14b22b933Srs /* -*- Mode: C; tab-width: 4 -*-
24b22b933Srs *
3*472cd20dSToomas Soome * Copyright (c) 2003-2020 Apple Inc. All rights reserved.
44b22b933Srs *
55ffb0c9bSToomas Soome * Redistribution and use in source and binary forms, with or without
64b22b933Srs * modification, are permitted provided that the following conditions are met:
74b22b933Srs *
85ffb0c9bSToomas Soome * 1. Redistributions of source code must retain the above copyright notice,
95ffb0c9bSToomas Soome * this list of conditions and the following disclaimer.
105ffb0c9bSToomas Soome * 2. Redistributions in binary form must reproduce the above copyright notice,
115ffb0c9bSToomas Soome * this list of conditions and the following disclaimer in the documentation
125ffb0c9bSToomas Soome * and/or other materials provided with the distribution.
13cda73f64SToomas Soome * 3. Neither the name of Apple Inc. ("Apple") nor the names of its
145ffb0c9bSToomas Soome * contributors may be used to endorse or promote products derived from this
155ffb0c9bSToomas Soome * software without specific prior written permission.
164b22b933Srs *
175ffb0c9bSToomas Soome * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
185ffb0c9bSToomas Soome * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
195ffb0c9bSToomas Soome * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
205ffb0c9bSToomas Soome * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
215ffb0c9bSToomas Soome * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
225ffb0c9bSToomas Soome * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
235ffb0c9bSToomas Soome * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
245ffb0c9bSToomas Soome * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
255ffb0c9bSToomas Soome * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
264b22b933Srs * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
274b22b933Srs */
284b22b933Srs
294b22b933Srs #include <errno.h>
304b22b933Srs #include <stdlib.h>
313b436d06SToomas Soome #include <fcntl.h>
325ffb0c9bSToomas Soome
33cda73f64SToomas Soome #include "dnssd_ipc.h"
34cda73f64SToomas Soome
355ffb0c9bSToomas Soome #if APPLE_OSX_mDNSResponder
365ffb0c9bSToomas Soome #include <mach-o/dyld.h>
375ffb0c9bSToomas Soome #include <uuid/uuid.h>
385ffb0c9bSToomas Soome #include <TargetConditionals.h>
39*472cd20dSToomas Soome #include "dns_sd_private.h"
40*472cd20dSToomas Soome #include "dnssd_clientstub_apple.h"
41*472cd20dSToomas Soome #include <CoreUtils/CommonServices.h>
42*472cd20dSToomas Soome #if !defined(__i386__)
43*472cd20dSToomas Soome #define CHECK_BUNDLE_VERSION 1
44*472cd20dSToomas Soome #else
45*472cd20dSToomas Soome #define CHECK_BUNDLE_VERSION 0
46*472cd20dSToomas Soome #endif
475ffb0c9bSToomas Soome #endif
484b22b933Srs
494b22b933Srs #if defined(_WIN32)
504b22b933Srs
515ffb0c9bSToomas Soome #define _SSIZE_T
525ffb0c9bSToomas Soome #include <CommonServices.h>
535ffb0c9bSToomas Soome #include <DebugServices.h>
545ffb0c9bSToomas Soome #include <winsock2.h>
555ffb0c9bSToomas Soome #include <ws2tcpip.h>
565ffb0c9bSToomas Soome #include <windows.h>
575ffb0c9bSToomas Soome #include <stdarg.h>
585ffb0c9bSToomas Soome #include <stdio.h>
594b22b933Srs
605ffb0c9bSToomas Soome #define sockaddr_mdns sockaddr_in
615ffb0c9bSToomas Soome #define AF_MDNS AF_INET
624b22b933Srs
635ffb0c9bSToomas Soome // Disable warning: "'type cast' : from data pointer 'void *' to function pointer"
645ffb0c9bSToomas Soome #pragma warning(disable:4055)
654b22b933Srs
665ffb0c9bSToomas Soome // Disable warning: "nonstandard extension, function/data pointer conversion in expression"
675ffb0c9bSToomas Soome #pragma warning(disable:4152)
684b22b933Srs
694b22b933Srs extern BOOL IsSystemServiceDisabled();
704b22b933Srs
715ffb0c9bSToomas Soome #define sleep(X) Sleep((X) * 1000)
724b22b933Srs
734b22b933Srs static int g_initWinsock = 0;
745ffb0c9bSToomas Soome #define LOG_WARNING kDebugLevelWarning
755ffb0c9bSToomas Soome #define LOG_INFO kDebugLevelInfo
syslog(int priority,const char * message,...)765ffb0c9bSToomas Soome static void syslog( int priority, const char * message, ...)
775ffb0c9bSToomas Soome {
785ffb0c9bSToomas Soome va_list args;
795ffb0c9bSToomas Soome int len;
805ffb0c9bSToomas Soome char * buffer;
815ffb0c9bSToomas Soome DWORD err = WSAGetLastError();
825ffb0c9bSToomas Soome (void) priority;
835ffb0c9bSToomas Soome va_start( args, message );
845ffb0c9bSToomas Soome len = _vscprintf( message, args ) + 1;
855ffb0c9bSToomas Soome buffer = malloc( len * sizeof(char) );
86cda73f64SToomas Soome if ( buffer ) { vsnprintf( buffer, len, message, args ); OutputDebugString( buffer ); free( buffer ); }
875ffb0c9bSToomas Soome WSASetLastError( err );
885ffb0c9bSToomas Soome }
894b22b933Srs #else
904b22b933Srs
91*472cd20dSToomas Soome #include <fcntl.h> // For O_RDWR etc.
925ffb0c9bSToomas Soome #include <sys/time.h>
935ffb0c9bSToomas Soome #include <sys/socket.h>
945ffb0c9bSToomas Soome #include <syslog.h>
954b22b933Srs
965ffb0c9bSToomas Soome #define sockaddr_mdns sockaddr_un
975ffb0c9bSToomas Soome #define AF_MDNS AF_LOCAL
984b22b933Srs
994b22b933Srs #endif
1004b22b933Srs
101*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
102*472cd20dSToomas Soome #include "bundle_utilities.h"
103*472cd20dSToomas Soome #include <os/feature_private.h>
104*472cd20dSToomas Soome #endif
105*472cd20dSToomas Soome
106*472cd20dSToomas Soome #if defined(_WIN32)
1075ffb0c9bSToomas Soome // <rdar://problem/4096913> Specifies how many times we'll try and connect to the server.
1084b22b933Srs
1094b22b933Srs #define DNSSD_CLIENT_MAXTRIES 4
110*472cd20dSToomas Soome #endif // _WIN32
1114b22b933Srs
1125ffb0c9bSToomas Soome // Uncomment the line below to use the old error return mechanism of creating a temporary named socket (e.g. in /var/tmp)
1135ffb0c9bSToomas Soome //#define USE_NAMED_ERROR_RETURN_SOCKET 1
1144b22b933Srs
1155ffb0c9bSToomas Soome // If the UDS client has not received a response from the daemon in 60 secs, it is unlikely to get one
1165ffb0c9bSToomas Soome // Note: Timeout of 3 secs should be sufficient in normal scenarios, but 60 secs is chosen as a safeguard since
1175ffb0c9bSToomas Soome // some clients may come up before mDNSResponder itself after a BOOT and on rare ocassions IOPM/Keychain/D2D calls
1185ffb0c9bSToomas Soome // in mDNSResponder's INIT may take a much longer time to return
1195ffb0c9bSToomas Soome #define DNSSD_CLIENT_TIMEOUT 60
1205ffb0c9bSToomas Soome
1215ffb0c9bSToomas Soome #ifndef CTL_PATH_PREFIX
1225ffb0c9bSToomas Soome #define CTL_PATH_PREFIX "/var/tmp/dnssd_result_socket."
1235ffb0c9bSToomas Soome #endif
1245ffb0c9bSToomas Soome
1255ffb0c9bSToomas Soome typedef struct
1265ffb0c9bSToomas Soome {
1275ffb0c9bSToomas Soome ipc_msg_hdr ipc_hdr;
1285ffb0c9bSToomas Soome DNSServiceFlags cb_flags;
1295ffb0c9bSToomas Soome uint32_t cb_interface;
1305ffb0c9bSToomas Soome DNSServiceErrorType cb_err;
1315ffb0c9bSToomas Soome } CallbackHeader;
1325ffb0c9bSToomas Soome
1335ffb0c9bSToomas Soome typedef struct _DNSServiceRef_t DNSServiceOp;
1345ffb0c9bSToomas Soome typedef struct _DNSRecordRef_t DNSRecord;
1355ffb0c9bSToomas Soome
1365ffb0c9bSToomas Soome #if !defined(_WIN32)
1375ffb0c9bSToomas Soome typedef struct
1385ffb0c9bSToomas Soome {
1395ffb0c9bSToomas Soome void *AppCallback; // Client callback function and context
1405ffb0c9bSToomas Soome void *AppContext;
1415ffb0c9bSToomas Soome } SleepKAContext;
1425ffb0c9bSToomas Soome #endif
1435ffb0c9bSToomas Soome
1445ffb0c9bSToomas Soome // client stub callback to process message from server and deliver results to client application
1455ffb0c9bSToomas Soome typedef void (*ProcessReplyFn)(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *msg, const char *const end);
1465ffb0c9bSToomas Soome
1475ffb0c9bSToomas Soome #define ValidatorBits 0x12345678
1485ffb0c9bSToomas Soome #define DNSServiceRefValid(X) (dnssd_SocketValid((X)->sockfd) && (((X)->sockfd ^ (X)->validator) == ValidatorBits))
1495ffb0c9bSToomas Soome
1505ffb0c9bSToomas Soome // When using kDNSServiceFlagsShareConnection, there is one primary _DNSServiceOp_t, and zero or more subordinates
1515ffb0c9bSToomas Soome // For the primary, the 'next' field points to the first subordinate, and its 'next' field points to the next, and so on.
1525ffb0c9bSToomas Soome // For the primary, the 'primary' field is NULL; for subordinates the 'primary' field points back to the associated primary
1535ffb0c9bSToomas Soome //
1545ffb0c9bSToomas Soome // _DNS_SD_LIBDISPATCH is defined where libdispatch/GCD is available. This does not mean that the application will use the
1555ffb0c9bSToomas Soome // DNSServiceSetDispatchQueue API. Hence any new code guarded with _DNS_SD_LIBDISPATCH should still be backwards compatible.
1565ffb0c9bSToomas Soome struct _DNSServiceRef_t
1575ffb0c9bSToomas Soome {
1585ffb0c9bSToomas Soome DNSServiceOp *next; // For shared connection
1595ffb0c9bSToomas Soome DNSServiceOp *primary; // For shared connection
1605ffb0c9bSToomas Soome dnssd_sock_t sockfd; // Connected socket between client and daemon
1615ffb0c9bSToomas Soome dnssd_sock_t validator; // Used to detect memory corruption, double disposals, etc.
1625ffb0c9bSToomas Soome client_context_t uid; // For shared connection requests, each subordinate DNSServiceRef has its own ID,
1635ffb0c9bSToomas Soome // unique within the scope of the same shared parent DNSServiceRef
1645ffb0c9bSToomas Soome uint32_t op; // request_op_t or reply_op_t
1655ffb0c9bSToomas Soome uint32_t max_index; // Largest assigned record index - 0 if no additional records registered
1665ffb0c9bSToomas Soome uint32_t logcounter; // Counter used to control number of syslog messages we write
1675ffb0c9bSToomas Soome int *moreptr; // Set while DNSServiceProcessResult working on this particular DNSServiceRef
1685ffb0c9bSToomas Soome ProcessReplyFn ProcessReply; // Function pointer to the code to handle received messages
1695ffb0c9bSToomas Soome void *AppCallback; // Client callback function and context
1705ffb0c9bSToomas Soome void *AppContext;
1715ffb0c9bSToomas Soome DNSRecord *rec;
1725ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
1735ffb0c9bSToomas Soome dispatch_source_t disp_source;
1745ffb0c9bSToomas Soome dispatch_queue_t disp_queue;
1755ffb0c9bSToomas Soome #endif
1765ffb0c9bSToomas Soome void *kacontext;
1775ffb0c9bSToomas Soome };
1785ffb0c9bSToomas Soome
1795ffb0c9bSToomas Soome struct _DNSRecordRef_t
1805ffb0c9bSToomas Soome {
1815ffb0c9bSToomas Soome DNSRecord *recnext;
1825ffb0c9bSToomas Soome void *AppContext;
1835ffb0c9bSToomas Soome DNSServiceRegisterRecordReply AppCallback;
1844b22b933Srs DNSRecordRef recref;
1854b22b933Srs uint32_t record_index; // index is unique to the ServiceDiscoveryRef
1865ffb0c9bSToomas Soome client_context_t uid; // For demultiplexing multiple DNSServiceRegisterRecord calls
1875ffb0c9bSToomas Soome DNSServiceOp *sdr;
1885ffb0c9bSToomas Soome };
1894b22b933Srs
190*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
_should_return_noauth_error(void)191*472cd20dSToomas Soome static bool _should_return_noauth_error(void)
192*472cd20dSToomas Soome {
193*472cd20dSToomas Soome static dispatch_once_t s_once = 0;
194*472cd20dSToomas Soome static bool s_should = false;
195*472cd20dSToomas Soome dispatch_once(&s_once,
196*472cd20dSToomas Soome ^{
197*472cd20dSToomas Soome s_should = bundle_sdk_is_ios14_or_later();
198*472cd20dSToomas Soome });
199*472cd20dSToomas Soome return s_should;
200*472cd20dSToomas Soome }
201*472cd20dSToomas Soome #endif
202*472cd20dSToomas Soome
203c65ebfc7SToomas Soome #if !defined(USE_TCP_LOOPBACK)
SetUDSPath(struct sockaddr_un * saddr,const char * path)204c65ebfc7SToomas Soome static void SetUDSPath(struct sockaddr_un *saddr, const char *path)
205c65ebfc7SToomas Soome {
206c65ebfc7SToomas Soome size_t pathLen;
207c65ebfc7SToomas Soome
208c65ebfc7SToomas Soome pathLen = strlen(path);
209c65ebfc7SToomas Soome if (pathLen < sizeof(saddr->sun_path))
210c65ebfc7SToomas Soome memcpy(saddr->sun_path, path, pathLen + 1);
211c65ebfc7SToomas Soome else
212c65ebfc7SToomas Soome saddr->sun_path[0] = '\0';
213c65ebfc7SToomas Soome }
214c65ebfc7SToomas Soome #endif
215c65ebfc7SToomas Soome
216*472cd20dSToomas Soome enum { write_all_success = 0, write_all_fail = -1, write_all_defunct = -2 };
217*472cd20dSToomas Soome
2185ffb0c9bSToomas Soome // Write len bytes. Return 0 on success, -1 on error
write_all(dnssd_sock_t sd,char * buf,size_t len)2195ffb0c9bSToomas Soome static int write_all(dnssd_sock_t sd, char *buf, size_t len)
2205ffb0c9bSToomas Soome {
2214b22b933Srs // Don't use "MSG_WAITALL"; it returns "Invalid argument" on some Linux versions; use an explicit while() loop instead.
222*472cd20dSToomas Soome //if (send(sd, buf, len, MSG_WAITALL) != len) return write_all_fail;
2234b22b933Srs while (len)
2245ffb0c9bSToomas Soome {
2255ffb0c9bSToomas Soome ssize_t num_written = send(sd, buf, (long)len, 0);
2265ffb0c9bSToomas Soome if (num_written < 0 || (size_t)num_written > len)
2275ffb0c9bSToomas Soome {
228c65ebfc7SToomas Soome // Check whether socket has gone defunct,
229c65ebfc7SToomas Soome // otherwise, an error here indicates some OS bug
2305ffb0c9bSToomas Soome // or that the mDNSResponder daemon crashed (which should never happen).
231c65ebfc7SToomas Soome #if !defined(__ppc__) && defined(SO_ISDEFUNCT)
232c65ebfc7SToomas Soome int defunct = 0;
2335ffb0c9bSToomas Soome socklen_t dlen = sizeof (defunct);
2345ffb0c9bSToomas Soome if (getsockopt(sd, SOL_SOCKET, SO_ISDEFUNCT, &defunct, &dlen) < 0)
2355ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub write_all: SO_ISDEFUNCT failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
2365ffb0c9bSToomas Soome if (!defunct)
2375ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub write_all(%d) failed %ld/%ld %d %s", sd,
2385ffb0c9bSToomas Soome (long)num_written, (long)len,
2395ffb0c9bSToomas Soome (num_written < 0) ? dnssd_errno : 0,
2405ffb0c9bSToomas Soome (num_written < 0) ? dnssd_strerror(dnssd_errno) : "");
2415ffb0c9bSToomas Soome else
2425ffb0c9bSToomas Soome syslog(LOG_INFO, "dnssd_clientstub write_all(%d) DEFUNCT", sd);
243*472cd20dSToomas Soome return defunct ? write_all_defunct : write_all_fail;
244c65ebfc7SToomas Soome #else
2455ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub write_all(%d) failed %ld/%ld %d %s", sd,
2465ffb0c9bSToomas Soome (long)num_written, (long)len,
2475ffb0c9bSToomas Soome (num_written < 0) ? dnssd_errno : 0,
2485ffb0c9bSToomas Soome (num_written < 0) ? dnssd_strerror(dnssd_errno) : "");
249*472cd20dSToomas Soome return write_all_fail;
250c65ebfc7SToomas Soome #endif
2515ffb0c9bSToomas Soome }
2525ffb0c9bSToomas Soome buf += num_written;
2535ffb0c9bSToomas Soome len -= num_written;
2544b22b933Srs }
255*472cd20dSToomas Soome return write_all_success;
2565ffb0c9bSToomas Soome }
2575ffb0c9bSToomas Soome
258*472cd20dSToomas Soome enum { read_all_success = 0, read_all_fail = -1, read_all_wouldblock = -2, read_all_defunct = -3 };
2594b22b933Srs
2605ffb0c9bSToomas Soome // Read len bytes. Return 0 on success, read_all_fail on error, or read_all_wouldblock for
read_all(dnssd_sock_t sd,char * buf,int len)2614b22b933Srs static int read_all(dnssd_sock_t sd, char *buf, int len)
2625ffb0c9bSToomas Soome {
2634b22b933Srs // Don't use "MSG_WAITALL"; it returns "Invalid argument" on some Linux versions; use an explicit while() loop instead.
2645ffb0c9bSToomas Soome //if (recv(sd, buf, len, MSG_WAITALL) != len) return -1;
2655ffb0c9bSToomas Soome
2664b22b933Srs while (len)
2675ffb0c9bSToomas Soome {
2685ffb0c9bSToomas Soome ssize_t num_read = recv(sd, buf, len, 0);
2695ffb0c9bSToomas Soome // It is valid to get an interrupted system call error e.g., somebody attaching
2705ffb0c9bSToomas Soome // in a debugger, retry without failing
271c65ebfc7SToomas Soome if ((num_read < 0) && (errno == EINTR))
272c65ebfc7SToomas Soome {
273c65ebfc7SToomas Soome syslog(LOG_INFO, "dnssd_clientstub read_all: EINTR continue");
274c65ebfc7SToomas Soome continue;
2755ffb0c9bSToomas Soome }
2765ffb0c9bSToomas Soome if ((num_read == 0) || (num_read < 0) || (num_read > len))
2775ffb0c9bSToomas Soome {
2785ffb0c9bSToomas Soome int printWarn = 0;
2795ffb0c9bSToomas Soome int defunct = 0;
280c65ebfc7SToomas Soome
281c65ebfc7SToomas Soome // Check whether socket has gone defunct,
282c65ebfc7SToomas Soome // otherwise, an error here indicates some OS bug
2835ffb0c9bSToomas Soome // or that the mDNSResponder daemon crashed (which should never happen).
2845ffb0c9bSToomas Soome #if defined(WIN32)
2855ffb0c9bSToomas Soome // <rdar://problem/7481776> Suppress logs for "A non-blocking socket operation
2865ffb0c9bSToomas Soome // could not be completed immediately"
2875ffb0c9bSToomas Soome if (WSAGetLastError() != WSAEWOULDBLOCK)
2885ffb0c9bSToomas Soome printWarn = 1;
2895ffb0c9bSToomas Soome #endif
2905ffb0c9bSToomas Soome #if !defined(__ppc__) && defined(SO_ISDEFUNCT)
2915ffb0c9bSToomas Soome {
2925ffb0c9bSToomas Soome socklen_t dlen = sizeof (defunct);
2935ffb0c9bSToomas Soome if (getsockopt(sd, SOL_SOCKET, SO_ISDEFUNCT, &defunct, &dlen) < 0)
2945ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub read_all: SO_ISDEFUNCT failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
2955ffb0c9bSToomas Soome }
2965ffb0c9bSToomas Soome if (!defunct)
2975ffb0c9bSToomas Soome printWarn = 1;
2985ffb0c9bSToomas Soome #endif
2995ffb0c9bSToomas Soome if (printWarn)
3005ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub read_all(%d) failed %ld/%ld %d %s", sd,
3015ffb0c9bSToomas Soome (long)num_read, (long)len,
3025ffb0c9bSToomas Soome (num_read < 0) ? dnssd_errno : 0,
3035ffb0c9bSToomas Soome (num_read < 0) ? dnssd_strerror(dnssd_errno) : "");
3045ffb0c9bSToomas Soome else if (defunct)
3055ffb0c9bSToomas Soome syslog(LOG_INFO, "dnssd_clientstub read_all(%d) DEFUNCT", sd);
306*472cd20dSToomas Soome return (num_read < 0 && dnssd_errno == dnssd_EWOULDBLOCK) ? read_all_wouldblock : (defunct ? read_all_defunct : read_all_fail);
3075ffb0c9bSToomas Soome }
3085ffb0c9bSToomas Soome buf += num_read;
3095ffb0c9bSToomas Soome len -= num_read;
3104b22b933Srs }
3115ffb0c9bSToomas Soome return read_all_success;
3125ffb0c9bSToomas Soome }
3135ffb0c9bSToomas Soome
3145ffb0c9bSToomas Soome // Returns 1 if more bytes remain to be read on socket descriptor sd, 0 otherwise
more_bytes(dnssd_sock_t sd)3155ffb0c9bSToomas Soome static int more_bytes(dnssd_sock_t sd)
3165ffb0c9bSToomas Soome {
3175ffb0c9bSToomas Soome struct timeval tv = { 0, 0 };
3185ffb0c9bSToomas Soome fd_set readfds;
3195ffb0c9bSToomas Soome fd_set *fs;
3205ffb0c9bSToomas Soome int ret;
3215ffb0c9bSToomas Soome
322c65ebfc7SToomas Soome #if defined(_WIN32)
323c65ebfc7SToomas Soome fs = &readfds;
324c65ebfc7SToomas Soome FD_ZERO(fs);
325c65ebfc7SToomas Soome FD_SET(sd, fs);
326c65ebfc7SToomas Soome ret = select((int)sd+1, fs, (fd_set*)NULL, (fd_set*)NULL, &tv);
327c65ebfc7SToomas Soome #else
328*472cd20dSToomas Soome // This whole thing would probably be better done using kevent() instead of select()
3295ffb0c9bSToomas Soome if (sd < FD_SETSIZE)
3305ffb0c9bSToomas Soome {
3315ffb0c9bSToomas Soome fs = &readfds;
3325ffb0c9bSToomas Soome FD_ZERO(fs);
3335ffb0c9bSToomas Soome }
3345ffb0c9bSToomas Soome else
3355ffb0c9bSToomas Soome {
3365ffb0c9bSToomas Soome // Compute the number of integers needed for storing "sd". Internally fd_set is stored
3375ffb0c9bSToomas Soome // as an array of ints with one bit for each fd and hence we need to compute
3385ffb0c9bSToomas Soome // the number of ints needed rather than the number of bytes. If "sd" is 32, we need
3395ffb0c9bSToomas Soome // two ints and not just one.
3405ffb0c9bSToomas Soome int nfdbits = sizeof (int) * 8;
3415ffb0c9bSToomas Soome int nints = (sd/nfdbits) + 1;
342cda73f64SToomas Soome fs = (fd_set *)calloc(nints, (size_t)sizeof(int));
343c65ebfc7SToomas Soome if (fs == NULL)
344c65ebfc7SToomas Soome {
345c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub more_bytes: malloc failed");
346c65ebfc7SToomas Soome return 0;
3475ffb0c9bSToomas Soome }
3485ffb0c9bSToomas Soome }
3495ffb0c9bSToomas Soome FD_SET(sd, fs);
3505ffb0c9bSToomas Soome ret = select((int)sd+1, fs, (fd_set*)NULL, (fd_set*)NULL, &tv);
351c65ebfc7SToomas Soome if (fs != &readfds)
3525ffb0c9bSToomas Soome free(fs);
353c65ebfc7SToomas Soome #endif
3545ffb0c9bSToomas Soome return (ret > 0);
3555ffb0c9bSToomas Soome }
3565ffb0c9bSToomas Soome
3575ffb0c9bSToomas Soome // set_waitlimit() implements a timeout using select. It is called from deliver_request() before recv() OR accept()
3585ffb0c9bSToomas Soome // to ensure the UDS clients are not blocked in these system calls indefinitely.
3595ffb0c9bSToomas Soome // Note: Ideally one should never be blocked here, because it indicates either mDNSResponder daemon is not yet up/hung/
360c65ebfc7SToomas Soome // superbusy/crashed or some other OS bug. For eg: On Windows which suffers from 3rd party software
361c65ebfc7SToomas Soome // (primarily 3rd party firewall software) interfering with proper functioning of the TCP protocol stack it is possible
3625ffb0c9bSToomas Soome // the next operation on this socket(recv/accept) is blocked since we depend on TCP to communicate with the system service.
set_waitlimit(dnssd_sock_t sock,int timeout)3635ffb0c9bSToomas Soome static int set_waitlimit(dnssd_sock_t sock, int timeout)
3645ffb0c9bSToomas Soome {
3655ffb0c9bSToomas Soome int gDaemonErr = kDNSServiceErr_NoError;
3665ffb0c9bSToomas Soome
367*472cd20dSToomas Soome // The comment below is wrong. The select() routine does not cause stack corruption.
368*472cd20dSToomas Soome // The use of FD_SET out of range for the bitmap is what causes stack corruption.
369*472cd20dSToomas Soome // For how to do this correctly, see the example using calloc() in more_bytes() above.
370*472cd20dSToomas Soome // Even better, both should be changed to use kevent() instead of select().
3715ffb0c9bSToomas Soome // To prevent stack corruption since select does not work with timeout if fds > FD_SETSIZE(1024)
3725ffb0c9bSToomas Soome if (!gDaemonErr && sock < FD_SETSIZE)
3735ffb0c9bSToomas Soome {
3745ffb0c9bSToomas Soome struct timeval tv;
3755ffb0c9bSToomas Soome fd_set set;
3765ffb0c9bSToomas Soome
3775ffb0c9bSToomas Soome FD_ZERO(&set);
3785ffb0c9bSToomas Soome FD_SET(sock, &set);
3795ffb0c9bSToomas Soome tv.tv_sec = timeout;
3805ffb0c9bSToomas Soome tv.tv_usec = 0;
3815ffb0c9bSToomas Soome if (!select((int)(sock + 1), &set, NULL, NULL, &tv))
3825ffb0c9bSToomas Soome {
3835ffb0c9bSToomas Soome // Ideally one should never hit this case: See comments before set_waitlimit()
3845ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub set_waitlimit:_daemon timed out (%d secs) without any response: Socket %d", timeout, sock);
3855ffb0c9bSToomas Soome gDaemonErr = kDNSServiceErr_Timeout;
3865ffb0c9bSToomas Soome }
3875ffb0c9bSToomas Soome }
3885ffb0c9bSToomas Soome return gDaemonErr;
3895ffb0c9bSToomas Soome }
3904b22b933Srs
3914b22b933Srs /* create_hdr
3924b22b933Srs *
3935ffb0c9bSToomas Soome * allocate and initialize an ipc message header. Value of len should initially be the
3945ffb0c9bSToomas Soome * length of the data, and is set to the value of the data plus the header. data_start
3955ffb0c9bSToomas Soome * is set to point to the beginning of the data section. SeparateReturnSocket should be
3965ffb0c9bSToomas Soome * non-zero for calls that can't receive an immediate error return value on their primary
3975ffb0c9bSToomas Soome * socket, and therefore require a separate return path for the error code result.
3984b22b933Srs * if zero, the path to a control socket is appended at the beginning of the message buffer.
3994b22b933Srs * data_start is set past this string.
4004b22b933Srs */
create_hdr(uint32_t op,size_t * len,char ** data_start,int SeparateReturnSocket,DNSServiceOp * ref)4015ffb0c9bSToomas Soome static ipc_msg_hdr *create_hdr(uint32_t op, size_t *len, char **data_start, int SeparateReturnSocket, DNSServiceOp *ref)
4025ffb0c9bSToomas Soome {
4034b22b933Srs char *msg = NULL;
4044b22b933Srs ipc_msg_hdr *hdr;
4054b22b933Srs int datalen;
4064b22b933Srs #if !defined(USE_TCP_LOOPBACK)
4075ffb0c9bSToomas Soome char ctrl_path[64] = ""; // "/var/tmp/dnssd_result_socket.xxxxxxxxxx-xxx-xxxxxx"
4084b22b933Srs #endif
4094b22b933Srs
4105ffb0c9bSToomas Soome if (SeparateReturnSocket)
4115ffb0c9bSToomas Soome {
4124b22b933Srs #if defined(USE_TCP_LOOPBACK)
4135ffb0c9bSToomas Soome *len += 2; // Allocate space for two-byte port number
4145ffb0c9bSToomas Soome #elif defined(USE_NAMED_ERROR_RETURN_SOCKET)
4155ffb0c9bSToomas Soome struct timeval tv;
4165ffb0c9bSToomas Soome if (gettimeofday(&tv, NULL) < 0)
4175ffb0c9bSToomas Soome { syslog(LOG_WARNING, "dnssd_clientstub create_hdr: gettimeofday failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno)); return NULL; }
418cda73f64SToomas Soome snprintf(ctrl_path, sizeof(ctrl_path), "%s%d-%.3lx-%.6lu", CTL_PATH_PREFIX, (int)getpid(),
4195ffb0c9bSToomas Soome (unsigned long)(tv.tv_sec & 0xFFF), (unsigned long)(tv.tv_usec));
4204b22b933Srs *len += strlen(ctrl_path) + 1;
4215ffb0c9bSToomas Soome #else
4225ffb0c9bSToomas Soome *len += 1; // Allocate space for single zero byte (empty C string)
4234b22b933Srs #endif
4245ffb0c9bSToomas Soome }
4254b22b933Srs
4264b22b933Srs datalen = (int) *len;
4274b22b933Srs *len += sizeof(ipc_msg_hdr);
4284b22b933Srs
4295ffb0c9bSToomas Soome // Write message to buffer
4304b22b933Srs msg = malloc(*len);
4315ffb0c9bSToomas Soome if (!msg) { syslog(LOG_WARNING, "dnssd_clientstub create_hdr: malloc failed"); return NULL; }
4325ffb0c9bSToomas Soome
4335ffb0c9bSToomas Soome memset(msg, 0, *len);
4345ffb0c9bSToomas Soome hdr = (ipc_msg_hdr *)msg;
4355ffb0c9bSToomas Soome hdr->version = VERSION;
4365ffb0c9bSToomas Soome hdr->datalen = datalen;
4375ffb0c9bSToomas Soome hdr->ipc_flags = 0;
4385ffb0c9bSToomas Soome hdr->op = op;
4395ffb0c9bSToomas Soome hdr->client_context = ref->uid;
4405ffb0c9bSToomas Soome hdr->reg_index = 0;
4414b22b933Srs *data_start = msg + sizeof(ipc_msg_hdr);
4424b22b933Srs #if defined(USE_TCP_LOOPBACK)
4435ffb0c9bSToomas Soome // Put dummy data in for the port, since we don't know what it is yet.
4445ffb0c9bSToomas Soome // The data will get filled in before we send the message. This happens in deliver_request().
4455ffb0c9bSToomas Soome if (SeparateReturnSocket) put_uint16(0, data_start);
4464b22b933Srs #else
4475ffb0c9bSToomas Soome if (SeparateReturnSocket) put_string(ctrl_path, data_start);
4484b22b933Srs #endif
4494b22b933Srs return hdr;
4505ffb0c9bSToomas Soome }
4514b22b933Srs
FreeDNSRecords(DNSServiceOp * sdRef)4525ffb0c9bSToomas Soome static void FreeDNSRecords(DNSServiceOp *sdRef)
4535ffb0c9bSToomas Soome {
4545ffb0c9bSToomas Soome DNSRecord *rec = sdRef->rec;
4555ffb0c9bSToomas Soome while (rec)
4564b22b933Srs {
4575ffb0c9bSToomas Soome DNSRecord *next = rec->recnext;
4585ffb0c9bSToomas Soome free(rec);
4595ffb0c9bSToomas Soome rec = next;
4605ffb0c9bSToomas Soome }
4615ffb0c9bSToomas Soome }
4624b22b933Srs
FreeDNSServiceOp(DNSServiceOp * x)4635ffb0c9bSToomas Soome static void FreeDNSServiceOp(DNSServiceOp *x)
4645ffb0c9bSToomas Soome {
4655ffb0c9bSToomas Soome // We don't use our DNSServiceRefValid macro here because if we're cleaning up after a socket() call failed
4665ffb0c9bSToomas Soome // then sockfd could legitimately contain a failing value (e.g. dnssd_InvalidSocket)
4675ffb0c9bSToomas Soome if ((x->sockfd ^ x->validator) != ValidatorBits)
468cda73f64SToomas Soome {
469cda73f64SToomas Soome }
4705ffb0c9bSToomas Soome else
4715ffb0c9bSToomas Soome {
4725ffb0c9bSToomas Soome x->next = NULL;
4735ffb0c9bSToomas Soome x->primary = NULL;
4745ffb0c9bSToomas Soome x->sockfd = dnssd_InvalidSocket;
4755ffb0c9bSToomas Soome x->validator = 0xDDDDDDDD;
4765ffb0c9bSToomas Soome x->op = request_op_none;
4775ffb0c9bSToomas Soome x->max_index = 0;
4785ffb0c9bSToomas Soome x->logcounter = 0;
4795ffb0c9bSToomas Soome x->moreptr = NULL;
4805ffb0c9bSToomas Soome x->ProcessReply = NULL;
4815ffb0c9bSToomas Soome x->AppCallback = NULL;
4825ffb0c9bSToomas Soome x->AppContext = NULL;
4835ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
4845ffb0c9bSToomas Soome if (x->disp_source) dispatch_release(x->disp_source);
4855ffb0c9bSToomas Soome x->disp_source = NULL;
4865ffb0c9bSToomas Soome x->disp_queue = NULL;
4875ffb0c9bSToomas Soome #endif
4885ffb0c9bSToomas Soome // DNSRecords may have been added to subordinate sdRef e.g., DNSServiceRegister/DNSServiceAddRecord
489c65ebfc7SToomas Soome // or on the main sdRef e.g., DNSServiceCreateConnection/DNSServiceRegisterRecord.
490c65ebfc7SToomas Soome // DNSRecords may have been freed if the application called DNSRemoveRecord.
4915ffb0c9bSToomas Soome FreeDNSRecords(x);
4925ffb0c9bSToomas Soome if (x->kacontext)
4935ffb0c9bSToomas Soome {
4945ffb0c9bSToomas Soome free(x->kacontext);
4955ffb0c9bSToomas Soome x->kacontext = NULL;
4965ffb0c9bSToomas Soome }
4975ffb0c9bSToomas Soome free(x);
4985ffb0c9bSToomas Soome }
4995ffb0c9bSToomas Soome }
5004b22b933Srs
5015ffb0c9bSToomas Soome // Return a connected service ref (deallocate with DNSServiceRefDeallocate)
ConnectToServer(DNSServiceRef * ref,DNSServiceFlags flags,uint32_t op,ProcessReplyFn ProcessReply,void * AppCallback,void * AppContext)5025ffb0c9bSToomas Soome static DNSServiceErrorType ConnectToServer(DNSServiceRef *ref, DNSServiceFlags flags, uint32_t op, ProcessReplyFn ProcessReply, void *AppCallback, void *AppContext)
5035ffb0c9bSToomas Soome {
504*472cd20dSToomas Soome #if defined(_WIN32)
5055ffb0c9bSToomas Soome int NumTries = 0;
506*472cd20dSToomas Soome #endif // _WIN32
5074b22b933Srs
5085ffb0c9bSToomas Soome dnssd_sockaddr_t saddr;
5095ffb0c9bSToomas Soome DNSServiceOp *sdr;
5104b22b933Srs
511c65ebfc7SToomas Soome if (!ref)
512c65ebfc7SToomas Soome {
513c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSService operation with NULL DNSServiceRef");
514c65ebfc7SToomas Soome return kDNSServiceErr_BadParam;
5155ffb0c9bSToomas Soome }
5164b22b933Srs
5175ffb0c9bSToomas Soome if (flags & kDNSServiceFlagsShareConnection)
5185ffb0c9bSToomas Soome {
5195ffb0c9bSToomas Soome if (!*ref)
5205ffb0c9bSToomas Soome {
5215ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub kDNSServiceFlagsShareConnection used with NULL DNSServiceRef");
5225ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
5235ffb0c9bSToomas Soome }
5245ffb0c9bSToomas Soome if (!DNSServiceRefValid(*ref) || ((*ref)->op != connection_request && (*ref)->op != connection_delegate_request) || (*ref)->primary)
5255ffb0c9bSToomas Soome {
5265ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub kDNSServiceFlagsShareConnection used with invalid DNSServiceRef %p %08X %08X op %d",
5275ffb0c9bSToomas Soome (*ref), (*ref)->sockfd, (*ref)->validator, (*ref)->op);
5285ffb0c9bSToomas Soome *ref = NULL;
5295ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
5305ffb0c9bSToomas Soome }
5315ffb0c9bSToomas Soome }
5324b22b933Srs
5335ffb0c9bSToomas Soome #if defined(_WIN32)
5345ffb0c9bSToomas Soome if (!g_initWinsock)
5355ffb0c9bSToomas Soome {
5365ffb0c9bSToomas Soome WSADATA wsaData;
5375ffb0c9bSToomas Soome g_initWinsock = 1;
5385ffb0c9bSToomas Soome if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { *ref = NULL; return kDNSServiceErr_ServiceNotRunning; }
5395ffb0c9bSToomas Soome }
5405ffb0c9bSToomas Soome // <rdar://problem/4096913> If the system service is disabled, we only want to try to connect once
541c65ebfc7SToomas Soome if (IsSystemServiceDisabled())
5425ffb0c9bSToomas Soome NumTries = DNSSD_CLIENT_MAXTRIES;
5435ffb0c9bSToomas Soome #endif
5445ffb0c9bSToomas Soome
5455ffb0c9bSToomas Soome sdr = malloc(sizeof(DNSServiceOp));
546c65ebfc7SToomas Soome if (!sdr)
547c65ebfc7SToomas Soome {
548c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: malloc failed");
549c65ebfc7SToomas Soome *ref = NULL;
550c65ebfc7SToomas Soome return kDNSServiceErr_NoMemory;
5515ffb0c9bSToomas Soome }
5525ffb0c9bSToomas Soome sdr->next = NULL;
5535ffb0c9bSToomas Soome sdr->primary = NULL;
5545ffb0c9bSToomas Soome sdr->sockfd = dnssd_InvalidSocket;
5555ffb0c9bSToomas Soome sdr->validator = sdr->sockfd ^ ValidatorBits;
5565ffb0c9bSToomas Soome sdr->op = op;
5575ffb0c9bSToomas Soome sdr->max_index = 0;
5585ffb0c9bSToomas Soome sdr->logcounter = 0;
5595ffb0c9bSToomas Soome sdr->moreptr = NULL;
5605ffb0c9bSToomas Soome sdr->uid.u32[0] = 0;
5615ffb0c9bSToomas Soome sdr->uid.u32[1] = 0;
5625ffb0c9bSToomas Soome sdr->ProcessReply = ProcessReply;
5635ffb0c9bSToomas Soome sdr->AppCallback = AppCallback;
5645ffb0c9bSToomas Soome sdr->AppContext = AppContext;
5655ffb0c9bSToomas Soome sdr->rec = NULL;
5665ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
5675ffb0c9bSToomas Soome sdr->disp_source = NULL;
5685ffb0c9bSToomas Soome sdr->disp_queue = NULL;
5694b22b933Srs #endif
5705ffb0c9bSToomas Soome sdr->kacontext = NULL;
571*472cd20dSToomas Soome
5725ffb0c9bSToomas Soome if (flags & kDNSServiceFlagsShareConnection)
5734b22b933Srs {
5745ffb0c9bSToomas Soome DNSServiceOp **p = &(*ref)->next; // Append ourselves to end of primary's list
575c65ebfc7SToomas Soome while (*p)
5765ffb0c9bSToomas Soome p = &(*p)->next;
5775ffb0c9bSToomas Soome *p = sdr;
5785ffb0c9bSToomas Soome // Preincrement counter before we use it -- it helps with debugging if we know the all-zeroes ID should never appear
579c65ebfc7SToomas Soome if (++(*ref)->uid.u32[0] == 0)
5805ffb0c9bSToomas Soome ++(*ref)->uid.u32[1]; // In parent DNSServiceOp increment UID counter
5815ffb0c9bSToomas Soome sdr->primary = *ref; // Set our primary pointer
5825ffb0c9bSToomas Soome sdr->sockfd = (*ref)->sockfd; // Inherit primary's socket
5835ffb0c9bSToomas Soome sdr->validator = (*ref)->validator;
5845ffb0c9bSToomas Soome sdr->uid = (*ref)->uid;
5855ffb0c9bSToomas Soome //printf("ConnectToServer sharing socket %d\n", sdr->sockfd);
5865ffb0c9bSToomas Soome }
5875ffb0c9bSToomas Soome else
5885ffb0c9bSToomas Soome {
5895ffb0c9bSToomas Soome #ifdef SO_NOSIGPIPE
5905ffb0c9bSToomas Soome const unsigned long optval = 1;
5915ffb0c9bSToomas Soome #endif
5925ffb0c9bSToomas Soome #ifndef USE_TCP_LOOPBACK
5935ffb0c9bSToomas Soome char* uds_serverpath = getenv(MDNS_UDS_SERVERPATH_ENVVAR);
5945ffb0c9bSToomas Soome if (uds_serverpath == NULL)
5955ffb0c9bSToomas Soome uds_serverpath = MDNS_UDS_SERVERPATH;
596cda73f64SToomas Soome else if (strlen(uds_serverpath) >= MAX_CTLPATH)
597cda73f64SToomas Soome {
598cda73f64SToomas Soome uds_serverpath = MDNS_UDS_SERVERPATH;
599cda73f64SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: using default path since env len is invalid");
600cda73f64SToomas Soome }
6015ffb0c9bSToomas Soome #endif
6025ffb0c9bSToomas Soome *ref = NULL;
6035ffb0c9bSToomas Soome sdr->sockfd = socket(AF_DNSSD, SOCK_STREAM, 0);
6045ffb0c9bSToomas Soome sdr->validator = sdr->sockfd ^ ValidatorBits;
6055ffb0c9bSToomas Soome if (!dnssd_SocketValid(sdr->sockfd))
6065ffb0c9bSToomas Soome {
6075ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: socket failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
6085ffb0c9bSToomas Soome FreeDNSServiceOp(sdr);
6095ffb0c9bSToomas Soome return kDNSServiceErr_NoMemory;
6105ffb0c9bSToomas Soome }
611*472cd20dSToomas Soome #if !defined(_WIN32)
612*472cd20dSToomas Soome int fcntl_flags = fcntl(sdr->sockfd, F_GETFD);
613*472cd20dSToomas Soome if (fcntl_flags != -1)
614*472cd20dSToomas Soome {
615*472cd20dSToomas Soome fcntl_flags |= FD_CLOEXEC;
616*472cd20dSToomas Soome int ret = fcntl(sdr->sockfd, F_SETFD, fcntl_flags);
617*472cd20dSToomas Soome if (ret == -1)
618*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: Failed to set FD_CLOEXEC on socket %d %s",
619*472cd20dSToomas Soome dnssd_errno, dnssd_strerror(dnssd_errno));
620*472cd20dSToomas Soome }
621*472cd20dSToomas Soome else
622*472cd20dSToomas Soome {
623*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: Failed to get the file descriptor flags of socket %d %s",
624*472cd20dSToomas Soome dnssd_errno, dnssd_strerror(dnssd_errno));
625*472cd20dSToomas Soome }
626*472cd20dSToomas Soome #endif // !defined(_WIN32)
6275ffb0c9bSToomas Soome #ifdef SO_NOSIGPIPE
6285ffb0c9bSToomas Soome // Some environments (e.g. OS X) support turning off SIGPIPE for a socket
6295ffb0c9bSToomas Soome if (setsockopt(sdr->sockfd, SOL_SOCKET, SO_NOSIGPIPE, &optval, sizeof(optval)) < 0)
6305ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: SO_NOSIGPIPE failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
6315ffb0c9bSToomas Soome #endif
6325ffb0c9bSToomas Soome #if defined(USE_TCP_LOOPBACK)
6335ffb0c9bSToomas Soome saddr.sin_family = AF_INET;
6345ffb0c9bSToomas Soome saddr.sin_addr.s_addr = inet_addr(MDNS_TCP_SERVERADDR);
6355ffb0c9bSToomas Soome saddr.sin_port = htons(MDNS_TCP_SERVERPORT);
6365ffb0c9bSToomas Soome #else
6375ffb0c9bSToomas Soome saddr.sun_family = AF_LOCAL;
638c65ebfc7SToomas Soome SetUDSPath(&saddr, uds_serverpath);
6395ffb0c9bSToomas Soome #if !defined(__ppc__) && defined(SO_DEFUNCTOK)
6405ffb0c9bSToomas Soome {
6415ffb0c9bSToomas Soome int defunct = 1;
6425ffb0c9bSToomas Soome if (setsockopt(sdr->sockfd, SOL_SOCKET, SO_DEFUNCTOK, &defunct, sizeof(defunct)) < 0)
6435ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: SO_DEFUNCTOK failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
6445ffb0c9bSToomas Soome }
6455ffb0c9bSToomas Soome #endif
6465ffb0c9bSToomas Soome #endif
647c65ebfc7SToomas Soome
648*472cd20dSToomas Soome #if defined(_WIN32)
6495ffb0c9bSToomas Soome while (1)
6505ffb0c9bSToomas Soome {
6515ffb0c9bSToomas Soome int err = connect(sdr->sockfd, (struct sockaddr *) &saddr, sizeof(saddr));
6525ffb0c9bSToomas Soome if (!err)
6535ffb0c9bSToomas Soome break; // If we succeeded, return sdr
654*472cd20dSToomas Soome
6555ffb0c9bSToomas Soome // If we failed, then it may be because the daemon is still launching.
6565ffb0c9bSToomas Soome // This can happen for processes that launch early in the boot process, while the
6575ffb0c9bSToomas Soome // daemon is still coming up. Rather than fail here, we wait 1 sec and try again.
6585ffb0c9bSToomas Soome // If, after DNSSD_CLIENT_MAXTRIES, we still can't connect to the daemon,
6595ffb0c9bSToomas Soome // then we give up and return a failure code.
6605ffb0c9bSToomas Soome if (++NumTries < DNSSD_CLIENT_MAXTRIES)
6615ffb0c9bSToomas Soome {
662c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: connect()-> No of tries: %d", NumTries);
6635ffb0c9bSToomas Soome sleep(1); // Sleep a bit, then try again
6645ffb0c9bSToomas Soome }
665c65ebfc7SToomas Soome else
6665ffb0c9bSToomas Soome {
667cda73f64SToomas Soome #if !defined(USE_TCP_LOOPBACK)
668c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: connect() failed path:%s Socket:%d Err:%d Errno:%d %s",
6695ffb0c9bSToomas Soome uds_serverpath, sdr->sockfd, err, dnssd_errno, dnssd_strerror(dnssd_errno));
670cda73f64SToomas Soome #endif
671c65ebfc7SToomas Soome dnssd_close(sdr->sockfd);
672c65ebfc7SToomas Soome FreeDNSServiceOp(sdr);
673c65ebfc7SToomas Soome return kDNSServiceErr_ServiceNotRunning;
6745ffb0c9bSToomas Soome }
6755ffb0c9bSToomas Soome }
676*472cd20dSToomas Soome #else
677*472cd20dSToomas Soome int err = connect(sdr->sockfd, (struct sockaddr *) &saddr, sizeof(saddr));
678*472cd20dSToomas Soome if (err)
679*472cd20dSToomas Soome {
680*472cd20dSToomas Soome #if !defined(USE_TCP_LOOPBACK)
681*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectToServer: connect() failed path:%s Socket:%d Err:%d Errno:%d %s",
682*472cd20dSToomas Soome uds_serverpath, sdr->sockfd, err, dnssd_errno, dnssd_strerror(dnssd_errno));
683*472cd20dSToomas Soome #endif
684*472cd20dSToomas Soome dnssd_close(sdr->sockfd);
685*472cd20dSToomas Soome FreeDNSServiceOp(sdr);
686*472cd20dSToomas Soome return kDNSServiceErr_ServiceNotRunning;
687*472cd20dSToomas Soome }
688*472cd20dSToomas Soome #endif
6895ffb0c9bSToomas Soome }
6905ffb0c9bSToomas Soome
6915ffb0c9bSToomas Soome *ref = sdr;
6925ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
6935ffb0c9bSToomas Soome }
6945ffb0c9bSToomas Soome
6955ffb0c9bSToomas Soome #define deliver_request_bailout(MSG) \
6963b436d06SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request: %s failed %d (%s)", (MSG), dnssd_errno, dnssd_strerror(dnssd_errno)); goto cleanup
6975ffb0c9bSToomas Soome
deliver_request(ipc_msg_hdr * hdr,DNSServiceOp * sdr)6985ffb0c9bSToomas Soome static DNSServiceErrorType deliver_request(ipc_msg_hdr *hdr, DNSServiceOp *sdr)
6995ffb0c9bSToomas Soome {
700c65ebfc7SToomas Soome uint32_t datalen;
701c65ebfc7SToomas Soome dnssd_sock_t listenfd = dnssd_InvalidSocket, errsd = dnssd_InvalidSocket;
702c65ebfc7SToomas Soome DNSServiceErrorType err = kDNSServiceErr_Unknown; // Default for the "goto cleanup" cases
703c65ebfc7SToomas Soome int MakeSeparateReturnSocket;
704*472cd20dSToomas Soome int ioresult;
705c65ebfc7SToomas Soome #if defined(USE_TCP_LOOPBACK) || defined(USE_NAMED_ERROR_RETURN_SOCKET)
706c65ebfc7SToomas Soome char *data;
707c65ebfc7SToomas Soome #endif
708c65ebfc7SToomas Soome
709cda73f64SToomas Soome if (!hdr)
710cda73f64SToomas Soome {
711cda73f64SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request: !hdr");
712cda73f64SToomas Soome return kDNSServiceErr_Unknown;
713cda73f64SToomas Soome }
714cda73f64SToomas Soome
715c65ebfc7SToomas Soome datalen = hdr->datalen; // We take a copy here because we're going to convert hdr->datalen to network byte order
7165ffb0c9bSToomas Soome #if defined(USE_TCP_LOOPBACK) || defined(USE_NAMED_ERROR_RETURN_SOCKET)
717c65ebfc7SToomas Soome data = (char *)hdr + sizeof(ipc_msg_hdr);
7185ffb0c9bSToomas Soome #endif
7195ffb0c9bSToomas Soome
7205ffb0c9bSToomas Soome // Note: need to check hdr->op, not sdr->op.
7215ffb0c9bSToomas Soome // hdr->op contains the code for the specific operation we're currently doing, whereas sdr->op
7225ffb0c9bSToomas Soome // contains the original parent DNSServiceOp (e.g. for an add_record_request, hdr->op will be
7235ffb0c9bSToomas Soome // add_record_request but the parent sdr->op will be connection_request or reg_service_request)
724c65ebfc7SToomas Soome MakeSeparateReturnSocket = (sdr->primary ||
725cda73f64SToomas Soome hdr->op == reg_record_request || hdr->op == add_record_request || hdr->op == update_record_request || hdr->op == remove_record_request);
7265ffb0c9bSToomas Soome
7275ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdr))
7285ffb0c9bSToomas Soome {
7295ffb0c9bSToomas Soome if (hdr)
7305ffb0c9bSToomas Soome free(hdr);
7315ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request: invalid DNSServiceRef %p %08X %08X", sdr, sdr->sockfd, sdr->validator);
7325ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
7335ffb0c9bSToomas Soome }
7344b22b933Srs
7355ffb0c9bSToomas Soome if (MakeSeparateReturnSocket)
7365ffb0c9bSToomas Soome {
7375ffb0c9bSToomas Soome #if defined(USE_TCP_LOOPBACK)
7385ffb0c9bSToomas Soome {
7395ffb0c9bSToomas Soome union { uint16_t s; u_char b[2]; } port;
7405ffb0c9bSToomas Soome dnssd_sockaddr_t caddr;
7415ffb0c9bSToomas Soome dnssd_socklen_t len = (dnssd_socklen_t) sizeof(caddr);
7425ffb0c9bSToomas Soome listenfd = socket(AF_DNSSD, SOCK_STREAM, 0);
7433b436d06SToomas Soome if (!dnssd_SocketValid(listenfd)) {
7443b436d06SToomas Soome deliver_request_bailout("TCP socket");
7453b436d06SToomas Soome }
7465ffb0c9bSToomas Soome
7475ffb0c9bSToomas Soome caddr.sin_family = AF_INET;
7485ffb0c9bSToomas Soome caddr.sin_port = 0;
7495ffb0c9bSToomas Soome caddr.sin_addr.s_addr = inet_addr(MDNS_TCP_SERVERADDR);
7503b436d06SToomas Soome if (bind(listenfd, (struct sockaddr*) &caddr, sizeof(caddr)) < 0) {
7513b436d06SToomas Soome deliver_request_bailout("TCP bind");
7523b436d06SToomas Soome }
7533b436d06SToomas Soome if (getsockname(listenfd, (struct sockaddr*) &caddr, &len) < 0) {
7543b436d06SToomas Soome deliver_request_bailout("TCP getsockname");
7553b436d06SToomas Soome }
7563b436d06SToomas Soome if (listen(listenfd, 1) < 0) {
7573b436d06SToomas Soome deliver_request_bailout("TCP listen");
7583b436d06SToomas Soome }
7595ffb0c9bSToomas Soome port.s = caddr.sin_port;
7605ffb0c9bSToomas Soome data[0] = port.b[0]; // don't switch the byte order, as the
7615ffb0c9bSToomas Soome data[1] = port.b[1]; // daemon expects it in network byte order
7625ffb0c9bSToomas Soome }
7635ffb0c9bSToomas Soome #elif defined(USE_NAMED_ERROR_RETURN_SOCKET)
7645ffb0c9bSToomas Soome {
7655ffb0c9bSToomas Soome mode_t mask;
7665ffb0c9bSToomas Soome int bindresult;
7675ffb0c9bSToomas Soome dnssd_sockaddr_t caddr;
7685ffb0c9bSToomas Soome listenfd = socket(AF_DNSSD, SOCK_STREAM, 0);
7693b436d06SToomas Soome if (!dnssd_SocketValid(listenfd)) {
7703b436d06SToomas Soome deliver_request_bailout("USE_NAMED_ERROR_RETURN_SOCKET socket");
7713b436d06SToomas Soome }
7725ffb0c9bSToomas Soome
7735ffb0c9bSToomas Soome caddr.sun_family = AF_LOCAL;
7745ffb0c9bSToomas Soome // According to Stevens (section 3.2), there is no portable way to
7755ffb0c9bSToomas Soome // determine whether sa_len is defined on a particular platform.
7765ffb0c9bSToomas Soome #ifndef NOT_HAVE_SA_LEN
7775ffb0c9bSToomas Soome caddr.sun_len = sizeof(struct sockaddr_un);
7785ffb0c9bSToomas Soome #endif
779c65ebfc7SToomas Soome SetUDSPath(&caddr, data);
7805ffb0c9bSToomas Soome mask = umask(0);
7815ffb0c9bSToomas Soome bindresult = bind(listenfd, (struct sockaddr *)&caddr, sizeof(caddr));
7825ffb0c9bSToomas Soome umask(mask);
7833b436d06SToomas Soome if (bindresult < 0) {
7843b436d06SToomas Soome deliver_request_bailout("USE_NAMED_ERROR_RETURN_SOCKET bind");
7853b436d06SToomas Soome }
7863b436d06SToomas Soome if (listen(listenfd, 1) < 0) {
7873b436d06SToomas Soome deliver_request_bailout("USE_NAMED_ERROR_RETURN_SOCKET listen");
7883b436d06SToomas Soome }
7895ffb0c9bSToomas Soome }
7905ffb0c9bSToomas Soome #else
7915ffb0c9bSToomas Soome {
7925ffb0c9bSToomas Soome dnssd_sock_t sp[2];
7933b436d06SToomas Soome if (socketpair(AF_DNSSD, SOCK_STREAM, 0, sp) < 0) {
7943b436d06SToomas Soome deliver_request_bailout("socketpair");
7953b436d06SToomas Soome }
7965ffb0c9bSToomas Soome else
7975ffb0c9bSToomas Soome {
7985ffb0c9bSToomas Soome errsd = sp[0]; // We'll read our four-byte error code from sp[0]
7995ffb0c9bSToomas Soome listenfd = sp[1]; // We'll send sp[1] to the daemon
8005ffb0c9bSToomas Soome #if !defined(__ppc__) && defined(SO_DEFUNCTOK)
8015ffb0c9bSToomas Soome {
8025ffb0c9bSToomas Soome int defunct = 1;
8035ffb0c9bSToomas Soome if (setsockopt(errsd, SOL_SOCKET, SO_DEFUNCTOK, &defunct, sizeof(defunct)) < 0)
804*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request: SO_DEFUNCTOK failed %d %s", dnssd_errno, dnssd_strerror(dnssd_errno));
8055ffb0c9bSToomas Soome }
8065ffb0c9bSToomas Soome #endif
8075ffb0c9bSToomas Soome }
8085ffb0c9bSToomas Soome }
8095ffb0c9bSToomas Soome #endif
8105ffb0c9bSToomas Soome }
8114b22b933Srs
8125ffb0c9bSToomas Soome #if !defined(USE_TCP_LOOPBACK) && !defined(USE_NAMED_ERROR_RETURN_SOCKET)
8135ffb0c9bSToomas Soome // If we're going to make a separate error return socket, and pass it to the daemon
8145ffb0c9bSToomas Soome // using sendmsg, then we'll hold back one data byte to go with it.
8155ffb0c9bSToomas Soome // On some versions of Unix (including Leopard) sending a control message without
8165ffb0c9bSToomas Soome // any associated data does not work reliably -- e.g. one particular issue we ran
8175ffb0c9bSToomas Soome // into is that if the receiving program is in a kqueue loop waiting to be notified
8185ffb0c9bSToomas Soome // of the received message, it doesn't get woken up when the control message arrives.
819c65ebfc7SToomas Soome if (MakeSeparateReturnSocket || sdr->op == send_bpf)
8205ffb0c9bSToomas Soome datalen--; // Okay to use sdr->op when checking for op == send_bpf
8215ffb0c9bSToomas Soome #endif
8225ffb0c9bSToomas Soome
8235ffb0c9bSToomas Soome // At this point, our listening socket is set up and waiting, if necessary, for the daemon to connect back to
8245ffb0c9bSToomas Soome ConvertHeaderBytes(hdr);
8255ffb0c9bSToomas Soome //syslog(LOG_WARNING, "dnssd_clientstub deliver_request writing %lu bytes", (unsigned long)(datalen + sizeof(ipc_msg_hdr)));
8265ffb0c9bSToomas Soome //if (MakeSeparateReturnSocket) syslog(LOG_WARNING, "dnssd_clientstub deliver_request name is %s", data);
8275ffb0c9bSToomas Soome #if TEST_SENDING_ONE_BYTE_AT_A_TIME
8285ffb0c9bSToomas Soome unsigned int i;
8295ffb0c9bSToomas Soome for (i=0; i<datalen + sizeof(ipc_msg_hdr); i++)
8305ffb0c9bSToomas Soome {
8315ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request writing %d", i);
832*472cd20dSToomas Soome ioresult = write_all(sdr->sockfd, ((char *)hdr)+i, 1);
833*472cd20dSToomas Soome if (ioresult < write_all_success)
834*472cd20dSToomas Soome {
835*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request write_all (byte %u) failed", i);
836*472cd20dSToomas Soome err = (ioresult == write_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning;
837*472cd20dSToomas Soome goto cleanup;
838*472cd20dSToomas Soome }
8395ffb0c9bSToomas Soome usleep(10000);
8405ffb0c9bSToomas Soome }
8414b22b933Srs #else
842*472cd20dSToomas Soome ioresult = write_all(sdr->sockfd, (char *)hdr, datalen + sizeof(ipc_msg_hdr));
843*472cd20dSToomas Soome if (ioresult < write_all_success)
8445ffb0c9bSToomas Soome {
8455ffb0c9bSToomas Soome // write_all already prints an error message if there is an error writing to
8465ffb0c9bSToomas Soome // the socket except for DEFUNCT. Logging here is unnecessary and also wrong
8475ffb0c9bSToomas Soome // in the case of DEFUNCT sockets
8485ffb0c9bSToomas Soome syslog(LOG_INFO, "dnssd_clientstub deliver_request ERROR: write_all(%d, %lu bytes) failed",
8495ffb0c9bSToomas Soome sdr->sockfd, (unsigned long)(datalen + sizeof(ipc_msg_hdr)));
850*472cd20dSToomas Soome err = (ioresult == write_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning;
8515ffb0c9bSToomas Soome goto cleanup;
8525ffb0c9bSToomas Soome }
8534b22b933Srs #endif
8545ffb0c9bSToomas Soome
855c65ebfc7SToomas Soome if (!MakeSeparateReturnSocket)
8565ffb0c9bSToomas Soome errsd = sdr->sockfd;
8575ffb0c9bSToomas Soome if (MakeSeparateReturnSocket || sdr->op == send_bpf) // Okay to use sdr->op when checking for op == send_bpf
8585ffb0c9bSToomas Soome {
8595ffb0c9bSToomas Soome #if defined(USE_TCP_LOOPBACK) || defined(USE_NAMED_ERROR_RETURN_SOCKET)
8605ffb0c9bSToomas Soome // At this point we may wait in accept for a few milliseconds waiting for the daemon to connect back to us,
8615ffb0c9bSToomas Soome // but that's okay -- the daemon should not take more than a few milliseconds to respond.
8625ffb0c9bSToomas Soome // set_waitlimit() ensures we do not block indefinitely just in case something is wrong
8635ffb0c9bSToomas Soome dnssd_sockaddr_t daddr;
8645ffb0c9bSToomas Soome dnssd_socklen_t len = sizeof(daddr);
865c65ebfc7SToomas Soome if ((err = set_waitlimit(listenfd, DNSSD_CLIENT_TIMEOUT)) != kDNSServiceErr_NoError)
8665ffb0c9bSToomas Soome goto cleanup;
8675ffb0c9bSToomas Soome errsd = accept(listenfd, (struct sockaddr *)&daddr, &len);
8683b436d06SToomas Soome if (!dnssd_SocketValid(errsd)) {
8695ffb0c9bSToomas Soome deliver_request_bailout("accept");
8703b436d06SToomas Soome }
8715ffb0c9bSToomas Soome #else
8725ffb0c9bSToomas Soome
8735ffb0c9bSToomas Soome struct iovec vec = { ((char *)hdr) + sizeof(ipc_msg_hdr) + datalen, 1 }; // Send the last byte along with the SCM_RIGHTS
8745ffb0c9bSToomas Soome struct msghdr msg;
8755ffb0c9bSToomas Soome struct cmsghdr *cmsg;
8765ffb0c9bSToomas Soome char cbuf[CMSG_SPACE(4 * sizeof(dnssd_sock_t))];
8775ffb0c9bSToomas Soome
8785ffb0c9bSToomas Soome msg.msg_name = 0;
8795ffb0c9bSToomas Soome msg.msg_namelen = 0;
8805ffb0c9bSToomas Soome msg.msg_iov = &vec;
8815ffb0c9bSToomas Soome msg.msg_iovlen = 1;
8825ffb0c9bSToomas Soome msg.msg_flags = 0;
8835ffb0c9bSToomas Soome if (MakeSeparateReturnSocket || sdr->op == send_bpf) // Okay to use sdr->op when checking for op == send_bpf
8845ffb0c9bSToomas Soome {
8855ffb0c9bSToomas Soome if (sdr->op == send_bpf)
8865ffb0c9bSToomas Soome {
8875ffb0c9bSToomas Soome int i;
8885ffb0c9bSToomas Soome char p[12]; // Room for "/dev/bpf999" with terminating null
8895ffb0c9bSToomas Soome for (i=0; i<100; i++)
8905ffb0c9bSToomas Soome {
8915ffb0c9bSToomas Soome snprintf(p, sizeof(p), "/dev/bpf%d", i);
8925ffb0c9bSToomas Soome listenfd = open(p, O_RDWR, 0);
893*472cd20dSToomas Soome //if (dnssd_SocketValid(listenfd)) syslog(LOG_WARNING, "dnssd_clientstub deliver_request Sending fd %d for %s", listenfd, p);
8945ffb0c9bSToomas Soome if (!dnssd_SocketValid(listenfd) && dnssd_errno != EBUSY)
895*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request Error opening %s %d (%s)", p, dnssd_errno, dnssd_strerror(dnssd_errno));
8965ffb0c9bSToomas Soome if (dnssd_SocketValid(listenfd) || dnssd_errno != EBUSY) break;
8975ffb0c9bSToomas Soome }
8985ffb0c9bSToomas Soome }
8995ffb0c9bSToomas Soome msg.msg_control = cbuf;
9005ffb0c9bSToomas Soome msg.msg_controllen = CMSG_LEN(sizeof(dnssd_sock_t));
9015ffb0c9bSToomas Soome
9025ffb0c9bSToomas Soome cmsg = CMSG_FIRSTHDR(&msg);
9035ffb0c9bSToomas Soome cmsg->cmsg_len = CMSG_LEN(sizeof(dnssd_sock_t));
9045ffb0c9bSToomas Soome cmsg->cmsg_level = SOL_SOCKET;
9055ffb0c9bSToomas Soome cmsg->cmsg_type = SCM_RIGHTS;
9065ffb0c9bSToomas Soome *((dnssd_sock_t *)CMSG_DATA(cmsg)) = listenfd;
9075ffb0c9bSToomas Soome }
9085ffb0c9bSToomas Soome
9095ffb0c9bSToomas Soome #if TEST_KQUEUE_CONTROL_MESSAGE_BUG
9105ffb0c9bSToomas Soome sleep(1);
9114b22b933Srs #endif
9124b22b933Srs
9135ffb0c9bSToomas Soome #if DEBUG_64BIT_SCM_RIGHTS
914*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request sendmsg read sd=%d write sd=%d %ld %ld %ld/%ld/%ld/%ld",
9155ffb0c9bSToomas Soome errsd, listenfd, sizeof(dnssd_sock_t), sizeof(void*),
9165ffb0c9bSToomas Soome sizeof(struct cmsghdr) + sizeof(dnssd_sock_t),
9175ffb0c9bSToomas Soome CMSG_LEN(sizeof(dnssd_sock_t)), (long)CMSG_SPACE(sizeof(dnssd_sock_t)),
9185ffb0c9bSToomas Soome (long)((char*)CMSG_DATA(cmsg) + 4 - cbuf));
9195ffb0c9bSToomas Soome #endif // DEBUG_64BIT_SCM_RIGHTS
9204b22b933Srs
9215ffb0c9bSToomas Soome if (sendmsg(sdr->sockfd, &msg, 0) < 0)
9224b22b933Srs {
9235ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request ERROR: sendmsg failed read sd=%d write sd=%d errno %d (%s)",
9245ffb0c9bSToomas Soome errsd, listenfd, dnssd_errno, dnssd_strerror(dnssd_errno));
9255ffb0c9bSToomas Soome err = kDNSServiceErr_Incompatible;
9265ffb0c9bSToomas Soome goto cleanup;
9274b22b933Srs }
9284b22b933Srs
9295ffb0c9bSToomas Soome #if DEBUG_64BIT_SCM_RIGHTS
930*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub deliver_request sendmsg read sd=%d write sd=%d okay", errsd, listenfd);
9315ffb0c9bSToomas Soome #endif // DEBUG_64BIT_SCM_RIGHTS
9324b22b933Srs
9335ffb0c9bSToomas Soome #endif
9345ffb0c9bSToomas Soome // Close our end of the socketpair *before* calling read_all() to get the four-byte error code.
9355ffb0c9bSToomas Soome // Otherwise, if the daemon closes our socket (or crashes), we will have to wait for a timeout
9365ffb0c9bSToomas Soome // in read_all() because the socket is not closed (we still have an open reference to it)
9375ffb0c9bSToomas Soome // Note: listenfd is overwritten in the case of send_bpf above and that will be closed here
9385ffb0c9bSToomas Soome // for send_bpf operation.
9395ffb0c9bSToomas Soome dnssd_close(listenfd);
9405ffb0c9bSToomas Soome listenfd = dnssd_InvalidSocket; // Make sure we don't close it a second time in the cleanup handling below
9415ffb0c9bSToomas Soome }
9425ffb0c9bSToomas Soome
9435ffb0c9bSToomas Soome // At this point we may wait in read_all for a few milliseconds waiting for the daemon to send us the error code,
9445ffb0c9bSToomas Soome // but that's okay -- the daemon should not take more than a few milliseconds to respond.
9455ffb0c9bSToomas Soome // set_waitlimit() ensures we do not block indefinitely just in case something is wrong
9465ffb0c9bSToomas Soome if (sdr->op == send_bpf) // Okay to use sdr->op when checking for op == send_bpf
9475ffb0c9bSToomas Soome err = kDNSServiceErr_NoError;
9485ffb0c9bSToomas Soome else if ((err = set_waitlimit(errsd, DNSSD_CLIENT_TIMEOUT)) == kDNSServiceErr_NoError)
9495ffb0c9bSToomas Soome {
950*472cd20dSToomas Soome ioresult = read_all(errsd, (char*)&err, (int)sizeof(err));
951*472cd20dSToomas Soome if (ioresult < read_all_success)
952*472cd20dSToomas Soome err = (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning; // On failure read_all will have written a message to syslog for us
9535ffb0c9bSToomas Soome else
9545ffb0c9bSToomas Soome err = ntohl(err);
9555ffb0c9bSToomas Soome }
9565ffb0c9bSToomas Soome //syslog(LOG_WARNING, "dnssd_clientstub deliver_request: retrieved error code %d", err);
9574b22b933Srs
9584b22b933Srs cleanup:
9595ffb0c9bSToomas Soome if (MakeSeparateReturnSocket)
9605ffb0c9bSToomas Soome {
9615ffb0c9bSToomas Soome if (dnssd_SocketValid(listenfd)) dnssd_close(listenfd);
9625ffb0c9bSToomas Soome if (dnssd_SocketValid(errsd)) dnssd_close(errsd);
9635ffb0c9bSToomas Soome #if defined(USE_NAMED_ERROR_RETURN_SOCKET)
9645ffb0c9bSToomas Soome // syslog(LOG_WARNING, "dnssd_clientstub deliver_request: removing UDS: %s", data);
9655ffb0c9bSToomas Soome if (unlink(data) != 0)
9665ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub WARNING: unlink(\"%s\") failed errno %d (%s)", data, dnssd_errno, dnssd_strerror(dnssd_errno));
9675ffb0c9bSToomas Soome // else syslog(LOG_WARNING, "dnssd_clientstub deliver_request: removed UDS: %s", data);
9684b22b933Srs #endif
9694b22b933Srs }
9704b22b933Srs
9715ffb0c9bSToomas Soome free(hdr);
9725ffb0c9bSToomas Soome return err;
9735ffb0c9bSToomas Soome }
9745ffb0c9bSToomas Soome
DNSServiceRefSockFD(DNSServiceRef sdRef)975c65ebfc7SToomas Soome dnssd_sock_t DNSSD_API DNSServiceRefSockFD(DNSServiceRef sdRef)
9765ffb0c9bSToomas Soome {
9775ffb0c9bSToomas Soome if (!sdRef) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRefSockFD called with NULL DNSServiceRef"); return dnssd_InvalidSocket; }
9785ffb0c9bSToomas Soome
9795ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
9804b22b933Srs {
9815ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRefSockFD called with invalid DNSServiceRef %p %08X %08X",
9825ffb0c9bSToomas Soome sdRef, sdRef->sockfd, sdRef->validator);
9835ffb0c9bSToomas Soome return dnssd_InvalidSocket;
9845ffb0c9bSToomas Soome }
9855ffb0c9bSToomas Soome
9865ffb0c9bSToomas Soome if (sdRef->primary)
9875ffb0c9bSToomas Soome {
9885ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRefSockFD undefined for kDNSServiceFlagsShareConnection subordinate DNSServiceRef %p", sdRef);
9895ffb0c9bSToomas Soome return dnssd_InvalidSocket;
9905ffb0c9bSToomas Soome }
9915ffb0c9bSToomas Soome
992c65ebfc7SToomas Soome return sdRef->sockfd;
9935ffb0c9bSToomas Soome }
9945ffb0c9bSToomas Soome
9955ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
CallbackWithError(DNSServiceRef sdRef,DNSServiceErrorType error)9965ffb0c9bSToomas Soome static void CallbackWithError(DNSServiceRef sdRef, DNSServiceErrorType error)
9975ffb0c9bSToomas Soome {
9985ffb0c9bSToomas Soome DNSServiceOp *sdr = sdRef;
9995ffb0c9bSToomas Soome DNSServiceOp *sdrNext;
10005ffb0c9bSToomas Soome DNSRecord *rec;
10015ffb0c9bSToomas Soome DNSRecord *recnext;
10025ffb0c9bSToomas Soome int morebytes;
10035ffb0c9bSToomas Soome
10045ffb0c9bSToomas Soome while (sdr)
10055ffb0c9bSToomas Soome {
10065ffb0c9bSToomas Soome // We can't touch the sdr after the callback as it can be deallocated in the callback
10075ffb0c9bSToomas Soome sdrNext = sdr->next;
10085ffb0c9bSToomas Soome morebytes = 1;
10095ffb0c9bSToomas Soome sdr->moreptr = &morebytes;
10105ffb0c9bSToomas Soome switch (sdr->op)
10115ffb0c9bSToomas Soome {
10125ffb0c9bSToomas Soome case resolve_request:
10135ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceResolveReply) sdr->AppCallback)(sdr, 0, 0, error, NULL, 0, 0, 0, NULL, sdr->AppContext);
10145ffb0c9bSToomas Soome break;
10155ffb0c9bSToomas Soome case query_request:
10165ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceQueryRecordReply)sdr->AppCallback)(sdr, 0, 0, error, NULL, 0, 0, 0, NULL, 0, sdr->AppContext);
10175ffb0c9bSToomas Soome break;
10185ffb0c9bSToomas Soome case addrinfo_request:
10195ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceGetAddrInfoReply)sdr->AppCallback)(sdr, 0, 0, error, NULL, NULL, 0, sdr->AppContext);
10205ffb0c9bSToomas Soome break;
10215ffb0c9bSToomas Soome case browse_request:
10225ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceBrowseReply) sdr->AppCallback)(sdr, 0, 0, error, NULL, 0, NULL, sdr->AppContext);
10235ffb0c9bSToomas Soome break;
10245ffb0c9bSToomas Soome case reg_service_request:
10255ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceRegisterReply) sdr->AppCallback)(sdr, 0, error, NULL, 0, NULL, sdr->AppContext);
10265ffb0c9bSToomas Soome break;
10275ffb0c9bSToomas Soome case enumeration_request:
10285ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceDomainEnumReply) sdr->AppCallback)(sdr, 0, 0, error, NULL, sdr->AppContext);
10295ffb0c9bSToomas Soome break;
10305ffb0c9bSToomas Soome case connection_request:
10315ffb0c9bSToomas Soome case connection_delegate_request:
10325ffb0c9bSToomas Soome // This means Register Record, walk the list of DNSRecords to do the callback
10335ffb0c9bSToomas Soome rec = sdr->rec;
10345ffb0c9bSToomas Soome while (rec)
10355ffb0c9bSToomas Soome {
10365ffb0c9bSToomas Soome recnext = rec->recnext;
10375ffb0c9bSToomas Soome if (rec->AppCallback) ((DNSServiceRegisterRecordReply)rec->AppCallback)(sdr, 0, 0, error, rec->AppContext);
10385ffb0c9bSToomas Soome // The Callback can call DNSServiceRefDeallocate which in turn frees sdr and all the records.
10395ffb0c9bSToomas Soome // Detect that and return early
1040*472cd20dSToomas Soome if (!morebytes) { syslog(LOG_WARNING, "dnssd_clientstub:Record: CallbackwithError morebytes zero"); return; }
10415ffb0c9bSToomas Soome rec = recnext;
10425ffb0c9bSToomas Soome }
10435ffb0c9bSToomas Soome break;
10445ffb0c9bSToomas Soome case port_mapping_request:
10455ffb0c9bSToomas Soome if (sdr->AppCallback) ((DNSServiceNATPortMappingReply)sdr->AppCallback)(sdr, 0, 0, error, 0, 0, 0, 0, 0, sdr->AppContext);
10465ffb0c9bSToomas Soome break;
10475ffb0c9bSToomas Soome default:
10485ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub CallbackWithError called with bad op %d", sdr->op);
10495ffb0c9bSToomas Soome }
10505ffb0c9bSToomas Soome // If DNSServiceRefDeallocate was called in the callback, morebytes will be zero. As the sdRef
10515ffb0c9bSToomas Soome // (and its subordinates) have been freed, we should not proceed further. Note that when we
10525ffb0c9bSToomas Soome // call the callback with a subordinate sdRef the application can call DNSServiceRefDeallocate
10535ffb0c9bSToomas Soome // on the main sdRef and DNSServiceRefDeallocate handles this case by walking all the sdRefs and
10545ffb0c9bSToomas Soome // clears the moreptr so that we can terminate here.
10555ffb0c9bSToomas Soome //
10565ffb0c9bSToomas Soome // If DNSServiceRefDeallocate was not called in the callback, then set moreptr to NULL so that
10575ffb0c9bSToomas Soome // we don't access the stack variable after we return from this function.
1058*472cd20dSToomas Soome if (!morebytes) { syslog(LOG_WARNING, "dnssd_clientstub:sdRef: CallbackwithError morebytes zero sdr %p", sdr); return; }
10595ffb0c9bSToomas Soome else {sdr->moreptr = NULL;}
10605ffb0c9bSToomas Soome sdr = sdrNext;
10614b22b933Srs }
10625ffb0c9bSToomas Soome }
10635ffb0c9bSToomas Soome #endif // _DNS_SD_LIBDISPATCH
10644b22b933Srs
10655ffb0c9bSToomas Soome // Handle reply from server, calling application client callback. If there is no reply
10664b22b933Srs // from the daemon on the socket contained in sdRef, the call will block.
DNSServiceProcessResult(DNSServiceRef sdRef)10674b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdRef)
10685ffb0c9bSToomas Soome {
10695ffb0c9bSToomas Soome int morebytes = 0;
1070*472cd20dSToomas Soome int ioresult;
1071*472cd20dSToomas Soome DNSServiceErrorType error;
10725ffb0c9bSToomas Soome
10735ffb0c9bSToomas Soome if (!sdRef) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult called with NULL DNSServiceRef"); return kDNSServiceErr_BadParam; }
10745ffb0c9bSToomas Soome
10755ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
10764b22b933Srs {
10775ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
10785ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
10795ffb0c9bSToomas Soome }
10804b22b933Srs
10815ffb0c9bSToomas Soome if (sdRef->primary)
10825ffb0c9bSToomas Soome {
10835ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult undefined for kDNSServiceFlagsShareConnection subordinate DNSServiceRef %p", sdRef);
10844b22b933Srs return kDNSServiceErr_BadReference;
10855ffb0c9bSToomas Soome }
10864b22b933Srs
10875ffb0c9bSToomas Soome if (!sdRef->ProcessReply)
10885ffb0c9bSToomas Soome {
10895ffb0c9bSToomas Soome static int num_logs = 0;
10905ffb0c9bSToomas Soome if (num_logs < 10) syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult called with DNSServiceRef with no ProcessReply function");
10915ffb0c9bSToomas Soome if (num_logs < 1000) num_logs++;else sleep(1);
10925ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
10934b22b933Srs }
10944b22b933Srs
10955ffb0c9bSToomas Soome do
10965ffb0c9bSToomas Soome {
10975ffb0c9bSToomas Soome CallbackHeader cbh;
10985ffb0c9bSToomas Soome char *data;
10995ffb0c9bSToomas Soome
11005ffb0c9bSToomas Soome // return NoError on EWOULDBLOCK. This will handle the case
11015ffb0c9bSToomas Soome // where a non-blocking socket is told there is data, but it was a false positive.
11025ffb0c9bSToomas Soome // On error, read_all will write a message to syslog for us, so don't need to duplicate that here
11035ffb0c9bSToomas Soome // Note: If we want to properly support using non-blocking sockets in the future
1104*472cd20dSToomas Soome ioresult = read_all(sdRef->sockfd, (void *)&cbh.ipc_hdr, sizeof(cbh.ipc_hdr));
1105*472cd20dSToomas Soome if (ioresult == read_all_fail || ioresult == read_all_defunct)
11065ffb0c9bSToomas Soome {
1107*472cd20dSToomas Soome error = (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning;
1108*472cd20dSToomas Soome
11095ffb0c9bSToomas Soome // Set the ProcessReply to NULL before callback as the sdRef can get deallocated
11105ffb0c9bSToomas Soome // in the callback.
11115ffb0c9bSToomas Soome sdRef->ProcessReply = NULL;
11125ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
11135ffb0c9bSToomas Soome // Call the callbacks with an error if using the dispatch API, as DNSServiceProcessResult
11145ffb0c9bSToomas Soome // is not called by the application and hence need to communicate the error. Cancel the
11155ffb0c9bSToomas Soome // source so that we don't get any more events
11165ffb0c9bSToomas Soome // Note: read_all fails if we could not read from the daemon which can happen if the
11175ffb0c9bSToomas Soome // daemon dies or the file descriptor is disconnected (defunct).
11185ffb0c9bSToomas Soome if (sdRef->disp_source)
11195ffb0c9bSToomas Soome {
11205ffb0c9bSToomas Soome dispatch_source_cancel(sdRef->disp_source);
11215ffb0c9bSToomas Soome dispatch_release(sdRef->disp_source);
11225ffb0c9bSToomas Soome sdRef->disp_source = NULL;
1123*472cd20dSToomas Soome CallbackWithError(sdRef, error);
11245ffb0c9bSToomas Soome }
11255ffb0c9bSToomas Soome #endif
11265ffb0c9bSToomas Soome // Don't touch sdRef anymore as it might have been deallocated
1127*472cd20dSToomas Soome return error;
11285ffb0c9bSToomas Soome }
1129*472cd20dSToomas Soome else if (ioresult == read_all_wouldblock)
11305ffb0c9bSToomas Soome {
11315ffb0c9bSToomas Soome if (morebytes && sdRef->logcounter < 100)
11325ffb0c9bSToomas Soome {
11335ffb0c9bSToomas Soome sdRef->logcounter++;
11345ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult error: select indicated data was waiting but read_all returned EWOULDBLOCK");
11355ffb0c9bSToomas Soome }
11365ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
11375ffb0c9bSToomas Soome }
11385ffb0c9bSToomas Soome
11395ffb0c9bSToomas Soome ConvertHeaderBytes(&cbh.ipc_hdr);
11405ffb0c9bSToomas Soome if (cbh.ipc_hdr.version != VERSION)
11415ffb0c9bSToomas Soome {
11425ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceProcessResult daemon version %d does not match client version %d", cbh.ipc_hdr.version, VERSION);
11435ffb0c9bSToomas Soome sdRef->ProcessReply = NULL;
11445ffb0c9bSToomas Soome return kDNSServiceErr_Incompatible;
11455ffb0c9bSToomas Soome }
11465ffb0c9bSToomas Soome
11475ffb0c9bSToomas Soome data = malloc(cbh.ipc_hdr.datalen);
11485ffb0c9bSToomas Soome if (!data) return kDNSServiceErr_NoMemory;
1149*472cd20dSToomas Soome ioresult = read_all(sdRef->sockfd, data, cbh.ipc_hdr.datalen);
1150*472cd20dSToomas Soome if (ioresult < read_all_success) // On error, read_all will write a message to syslog for us
11515ffb0c9bSToomas Soome {
1152*472cd20dSToomas Soome error = (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning;
1153*472cd20dSToomas Soome
11545ffb0c9bSToomas Soome // Set the ProcessReply to NULL before callback as the sdRef can get deallocated
11555ffb0c9bSToomas Soome // in the callback.
11565ffb0c9bSToomas Soome sdRef->ProcessReply = NULL;
11575ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
11585ffb0c9bSToomas Soome // Call the callbacks with an error if using the dispatch API, as DNSServiceProcessResult
11595ffb0c9bSToomas Soome // is not called by the application and hence need to communicate the error. Cancel the
11605ffb0c9bSToomas Soome // source so that we don't get any more events
11615ffb0c9bSToomas Soome if (sdRef->disp_source)
11625ffb0c9bSToomas Soome {
11635ffb0c9bSToomas Soome dispatch_source_cancel(sdRef->disp_source);
11645ffb0c9bSToomas Soome dispatch_release(sdRef->disp_source);
11655ffb0c9bSToomas Soome sdRef->disp_source = NULL;
1166*472cd20dSToomas Soome CallbackWithError(sdRef, error);
11675ffb0c9bSToomas Soome }
11685ffb0c9bSToomas Soome #endif
11695ffb0c9bSToomas Soome // Don't touch sdRef anymore as it might have been deallocated
11705ffb0c9bSToomas Soome free(data);
1171*472cd20dSToomas Soome return error;
11725ffb0c9bSToomas Soome }
11735ffb0c9bSToomas Soome else
11745ffb0c9bSToomas Soome {
11755ffb0c9bSToomas Soome const char *ptr = data;
11765ffb0c9bSToomas Soome cbh.cb_flags = get_flags (&ptr, data + cbh.ipc_hdr.datalen);
11775ffb0c9bSToomas Soome cbh.cb_interface = get_uint32 (&ptr, data + cbh.ipc_hdr.datalen);
11785ffb0c9bSToomas Soome cbh.cb_err = get_error_code(&ptr, data + cbh.ipc_hdr.datalen);
11795ffb0c9bSToomas Soome
11805ffb0c9bSToomas Soome // CAUTION: We have to handle the case where the client calls DNSServiceRefDeallocate from within the callback function.
11815ffb0c9bSToomas Soome // To do this we set moreptr to point to morebytes. If the client does call DNSServiceRefDeallocate(),
11825ffb0c9bSToomas Soome // then that routine will clear morebytes for us, and cause us to exit our loop.
11835ffb0c9bSToomas Soome morebytes = more_bytes(sdRef->sockfd);
11845ffb0c9bSToomas Soome if (morebytes)
11855ffb0c9bSToomas Soome {
11865ffb0c9bSToomas Soome cbh.cb_flags |= kDNSServiceFlagsMoreComing;
11875ffb0c9bSToomas Soome sdRef->moreptr = &morebytes;
11885ffb0c9bSToomas Soome }
11895ffb0c9bSToomas Soome if (ptr) sdRef->ProcessReply(sdRef, &cbh, ptr, data + cbh.ipc_hdr.datalen);
11905ffb0c9bSToomas Soome // Careful code here:
11915ffb0c9bSToomas Soome // If morebytes is non-zero, that means we set sdRef->moreptr above, and the operation was not
11925ffb0c9bSToomas Soome // cancelled out from under us, so now we need to clear sdRef->moreptr so we don't leave a stray
11935ffb0c9bSToomas Soome // dangling pointer pointing to a long-gone stack variable.
11945ffb0c9bSToomas Soome // If morebytes is zero, then one of two thing happened:
11955ffb0c9bSToomas Soome // (a) morebytes was 0 above, so we didn't set sdRef->moreptr, so we don't need to clear it
11965ffb0c9bSToomas Soome // (b) morebytes was 1 above, and we set sdRef->moreptr, but the operation was cancelled (with DNSServiceRefDeallocate()),
11975ffb0c9bSToomas Soome // so we MUST NOT try to dereference our stale sdRef pointer.
11985ffb0c9bSToomas Soome if (morebytes) sdRef->moreptr = NULL;
11995ffb0c9bSToomas Soome }
12005ffb0c9bSToomas Soome free(data);
12015ffb0c9bSToomas Soome } while (morebytes);
12025ffb0c9bSToomas Soome
12035ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
12045ffb0c9bSToomas Soome }
12055ffb0c9bSToomas Soome
DNSServiceRefDeallocate(DNSServiceRef sdRef)12064b22b933Srs void DNSSD_API DNSServiceRefDeallocate(DNSServiceRef sdRef)
12075ffb0c9bSToomas Soome {
12085ffb0c9bSToomas Soome if (!sdRef) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef"); return; }
12095ffb0c9bSToomas Soome
12105ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef)) // Also verifies dnssd_SocketValid(sdRef->sockfd) for us too
12115ffb0c9bSToomas Soome {
12125ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRefDeallocate called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
12135ffb0c9bSToomas Soome return;
12145ffb0c9bSToomas Soome }
12155ffb0c9bSToomas Soome
12165ffb0c9bSToomas Soome // If we're in the middle of a DNSServiceProcessResult() invocation for this DNSServiceRef, clear its morebytes flag to break it out of its while loop
12175ffb0c9bSToomas Soome if (sdRef->moreptr) *(sdRef->moreptr) = 0;
12185ffb0c9bSToomas Soome
12195ffb0c9bSToomas Soome if (sdRef->primary) // If this is a subordinate DNSServiceOp, just send a 'stop' command
12205ffb0c9bSToomas Soome {
12215ffb0c9bSToomas Soome DNSServiceOp **p = &sdRef->primary->next;
12225ffb0c9bSToomas Soome while (*p && *p != sdRef) p = &(*p)->next;
12235ffb0c9bSToomas Soome if (*p)
12245ffb0c9bSToomas Soome {
12255ffb0c9bSToomas Soome char *ptr;
12265ffb0c9bSToomas Soome size_t len = 0;
12275ffb0c9bSToomas Soome ipc_msg_hdr *hdr = create_hdr(cancel_request, &len, &ptr, 0, sdRef);
12285ffb0c9bSToomas Soome if (hdr)
12295ffb0c9bSToomas Soome {
12305ffb0c9bSToomas Soome ConvertHeaderBytes(hdr);
12315ffb0c9bSToomas Soome write_all(sdRef->sockfd, (char *)hdr, len);
12325ffb0c9bSToomas Soome free(hdr);
12335ffb0c9bSToomas Soome }
12345ffb0c9bSToomas Soome *p = sdRef->next;
12355ffb0c9bSToomas Soome FreeDNSServiceOp(sdRef);
12365ffb0c9bSToomas Soome }
12375ffb0c9bSToomas Soome }
12385ffb0c9bSToomas Soome else // else, make sure to terminate all subordinates as well
12395ffb0c9bSToomas Soome {
12405ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
12415ffb0c9bSToomas Soome // The cancel handler will close the fd if a dispatch source has been set
12425ffb0c9bSToomas Soome if (sdRef->disp_source)
12435ffb0c9bSToomas Soome {
12445ffb0c9bSToomas Soome // By setting the ProcessReply to NULL, we make sure that we never call
12455ffb0c9bSToomas Soome // the application callbacks ever, after returning from this function. We
12465ffb0c9bSToomas Soome // assume that DNSServiceRefDeallocate is called from the serial queue
12475ffb0c9bSToomas Soome // that was passed to DNSServiceSetDispatchQueue. Hence, dispatch_source_cancel
12485ffb0c9bSToomas Soome // should cancel all the blocks on the queue and hence there should be no more
12495ffb0c9bSToomas Soome // callbacks when we return from this function. Setting ProcessReply to NULL
12505ffb0c9bSToomas Soome // provides extra protection.
12515ffb0c9bSToomas Soome sdRef->ProcessReply = NULL;
12525ffb0c9bSToomas Soome shutdown(sdRef->sockfd, SHUT_WR);
12535ffb0c9bSToomas Soome dispatch_source_cancel(sdRef->disp_source);
12545ffb0c9bSToomas Soome dispatch_release(sdRef->disp_source);
12555ffb0c9bSToomas Soome sdRef->disp_source = NULL;
12565ffb0c9bSToomas Soome }
12575ffb0c9bSToomas Soome // if disp_queue is set, it means it used the DNSServiceSetDispatchQueue API. In that case,
12585ffb0c9bSToomas Soome // when the source was cancelled, the fd was closed in the handler. Currently the source
12595ffb0c9bSToomas Soome // is cancelled only when the mDNSResponder daemon dies
12605ffb0c9bSToomas Soome else if (!sdRef->disp_queue) dnssd_close(sdRef->sockfd);
12615ffb0c9bSToomas Soome #else
12625ffb0c9bSToomas Soome dnssd_close(sdRef->sockfd);
12635ffb0c9bSToomas Soome #endif
12645ffb0c9bSToomas Soome // Free DNSRecords added in DNSRegisterRecord if they have not
12655ffb0c9bSToomas Soome // been freed in DNSRemoveRecord
12665ffb0c9bSToomas Soome while (sdRef)
12675ffb0c9bSToomas Soome {
12685ffb0c9bSToomas Soome DNSServiceOp *p = sdRef;
12695ffb0c9bSToomas Soome sdRef = sdRef->next;
12705ffb0c9bSToomas Soome // When there is an error reading from the daemon e.g., bad fd, CallbackWithError
12715ffb0c9bSToomas Soome // is called which sets moreptr. It might set the moreptr on a subordinate sdRef
12725ffb0c9bSToomas Soome // but the application might call DNSServiceRefDeallocate with the main sdRef from
12735ffb0c9bSToomas Soome // the callback. Hence, when we loop through the subordinate sdRefs, we need
12745ffb0c9bSToomas Soome // to clear the moreptr so that CallbackWithError can terminate itself instead of
12755ffb0c9bSToomas Soome // walking through the freed sdRefs.
12765ffb0c9bSToomas Soome if (p->moreptr) *(p->moreptr) = 0;
12775ffb0c9bSToomas Soome FreeDNSServiceOp(p);
12785ffb0c9bSToomas Soome }
12795ffb0c9bSToomas Soome }
12805ffb0c9bSToomas Soome }
12815ffb0c9bSToomas Soome
DNSServiceGetProperty(const char * property,void * result,uint32_t * size)12825ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceGetProperty(const char *property, void *result, uint32_t *size)
12835ffb0c9bSToomas Soome {
1284c65ebfc7SToomas Soome DNSServiceErrorType err;
12855ffb0c9bSToomas Soome char *ptr;
1286c65ebfc7SToomas Soome size_t len;
12875ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
12885ffb0c9bSToomas Soome DNSServiceOp *tmp;
12895ffb0c9bSToomas Soome uint32_t actualsize;
1290*472cd20dSToomas Soome int ioresult;
12915ffb0c9bSToomas Soome
1292c65ebfc7SToomas Soome if (!property || !result || !size)
1293c65ebfc7SToomas Soome return kDNSServiceErr_BadParam;
1294c65ebfc7SToomas Soome
1295c65ebfc7SToomas Soome len = strlen(property) + 1;
1296c65ebfc7SToomas Soome err = ConnectToServer(&tmp, 0, getproperty_request, NULL, NULL, NULL);
12975ffb0c9bSToomas Soome if (err) return err;
12985ffb0c9bSToomas Soome
12995ffb0c9bSToomas Soome hdr = create_hdr(getproperty_request, &len, &ptr, 0, tmp);
13005ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(tmp); return kDNSServiceErr_NoMemory; }
13015ffb0c9bSToomas Soome
13025ffb0c9bSToomas Soome put_string(property, &ptr);
13035ffb0c9bSToomas Soome err = deliver_request(hdr, tmp); // Will free hdr for us
1304cda73f64SToomas Soome if (err) { DNSServiceRefDeallocate(tmp); return err; }
1305cda73f64SToomas Soome
1306*472cd20dSToomas Soome ioresult = read_all(tmp->sockfd, (char*)&actualsize, (int)sizeof(actualsize));
1307*472cd20dSToomas Soome if (ioresult < read_all_success)
1308*472cd20dSToomas Soome { DNSServiceRefDeallocate(tmp); return (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning; }
13095ffb0c9bSToomas Soome
13105ffb0c9bSToomas Soome actualsize = ntohl(actualsize);
1311*472cd20dSToomas Soome ioresult = read_all(tmp->sockfd, (char*)result, actualsize < *size ? actualsize : *size);
1312*472cd20dSToomas Soome if (ioresult < read_all_success)
1313*472cd20dSToomas Soome { DNSServiceRefDeallocate(tmp); return (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning; }
13145ffb0c9bSToomas Soome DNSServiceRefDeallocate(tmp);
13155ffb0c9bSToomas Soome
13165ffb0c9bSToomas Soome // Swap version result back to local process byte order
13175ffb0c9bSToomas Soome if (!strcmp(property, kDNSServiceProperty_DaemonVersion) && *size >= 4)
13185ffb0c9bSToomas Soome *(uint32_t*)result = ntohl(*(uint32_t*)result);
13195ffb0c9bSToomas Soome
13205ffb0c9bSToomas Soome *size = actualsize;
13215ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
13225ffb0c9bSToomas Soome }
13235ffb0c9bSToomas Soome
DNSServiceGetPID(const uint16_t srcport,int32_t * pid)13245ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceGetPID(const uint16_t srcport, int32_t *pid)
13255ffb0c9bSToomas Soome {
13265ffb0c9bSToomas Soome char *ptr;
13275ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
1328c65ebfc7SToomas Soome DNSServiceOp *tmp = NULL;
13295ffb0c9bSToomas Soome size_t len = sizeof(int32_t);
1330*472cd20dSToomas Soome int ioresult;
13315ffb0c9bSToomas Soome
13325ffb0c9bSToomas Soome DNSServiceErrorType err = ConnectToServer(&tmp, 0, getpid_request, NULL, NULL, NULL);
1333cda73f64SToomas Soome if (err) return err;
13345ffb0c9bSToomas Soome
13355ffb0c9bSToomas Soome hdr = create_hdr(getpid_request, &len, &ptr, 0, tmp);
1336cda73f64SToomas Soome if (!hdr) { DNSServiceRefDeallocate(tmp); return kDNSServiceErr_NoMemory; }
13374b22b933Srs
13385ffb0c9bSToomas Soome put_uint16(srcport, &ptr);
13395ffb0c9bSToomas Soome err = deliver_request(hdr, tmp); // Will free hdr for us
1340cda73f64SToomas Soome if (err) { DNSServiceRefDeallocate(tmp); return err; }
13415ffb0c9bSToomas Soome
1342*472cd20dSToomas Soome ioresult = read_all(tmp->sockfd, (char*)pid, sizeof(int32_t));
1343*472cd20dSToomas Soome if (ioresult < read_all_success)
1344*472cd20dSToomas Soome { DNSServiceRefDeallocate(tmp); return (ioresult == read_all_defunct) ? kDNSServiceErr_DefunctConnection : kDNSServiceErr_ServiceNotRunning; }
13455ffb0c9bSToomas Soome
13465ffb0c9bSToomas Soome DNSServiceRefDeallocate(tmp);
13475ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
13485ffb0c9bSToomas Soome }
13495ffb0c9bSToomas Soome
handle_resolve_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * end)13505ffb0c9bSToomas Soome static void handle_resolve_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *end)
13515ffb0c9bSToomas Soome {
13524b22b933Srs char fullname[kDNSServiceMaxDomainName];
13534b22b933Srs char target[kDNSServiceMaxDomainName];
13544b22b933Srs uint16_t txtlen;
13554b22b933Srs union { uint16_t s; u_char b[2]; } port;
13564b22b933Srs unsigned char *txtrecord;
13575ffb0c9bSToomas Soome
13585ffb0c9bSToomas Soome get_string(&data, end, fullname, kDNSServiceMaxDomainName);
13595ffb0c9bSToomas Soome get_string(&data, end, target, kDNSServiceMaxDomainName);
13605ffb0c9bSToomas Soome if (!data || data + 2 > end) goto fail;
13615ffb0c9bSToomas Soome
13624b22b933Srs port.b[0] = *data++;
13634b22b933Srs port.b[1] = *data++;
13645ffb0c9bSToomas Soome txtlen = get_uint16(&data, end);
13655ffb0c9bSToomas Soome txtrecord = (unsigned char *)get_rdata(&data, end, txtlen);
13664b22b933Srs
13675ffb0c9bSToomas Soome if (!data) goto fail;
13685ffb0c9bSToomas Soome ((DNSServiceResolveReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, fullname, target, port.s, txtlen, txtrecord, sdr->AppContext);
13695ffb0c9bSToomas Soome return;
13705ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
13715ffb0c9bSToomas Soome fail:
13725ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub handle_resolve_response: error reading result from daemon");
13735ffb0c9bSToomas Soome }
13745ffb0c9bSToomas Soome
1375*472cd20dSToomas Soome #if TARGET_OS_IPHONE
13765ffb0c9bSToomas Soome
13775ffb0c9bSToomas Soome static int32_t libSystemVersion = 0;
13785ffb0c9bSToomas Soome
13795ffb0c9bSToomas Soome // Return true if the iOS application linked against a version of libsystem where P2P
13805ffb0c9bSToomas Soome // interfaces were included by default when using kDNSServiceInterfaceIndexAny.
13815ffb0c9bSToomas Soome // Using 160.0.0 == 0xa00000 as the version threshold.
includeP2PWithIndexAny()13825ffb0c9bSToomas Soome static int includeP2PWithIndexAny()
13835ffb0c9bSToomas Soome {
13845ffb0c9bSToomas Soome if (libSystemVersion == 0)
13855ffb0c9bSToomas Soome libSystemVersion = NSVersionOfLinkTimeLibrary("System");
13865ffb0c9bSToomas Soome
13875ffb0c9bSToomas Soome if (libSystemVersion < 0xa00000)
13885ffb0c9bSToomas Soome return 1;
13895ffb0c9bSToomas Soome else
13905ffb0c9bSToomas Soome return 0;
13915ffb0c9bSToomas Soome }
13925ffb0c9bSToomas Soome
1393*472cd20dSToomas Soome #else // TARGET_OS_IPHONE
13945ffb0c9bSToomas Soome
13955ffb0c9bSToomas Soome // always return false for non iOS platforms
includeP2PWithIndexAny()13965ffb0c9bSToomas Soome static int includeP2PWithIndexAny()
13975ffb0c9bSToomas Soome {
13985ffb0c9bSToomas Soome return 0;
13995ffb0c9bSToomas Soome }
14005ffb0c9bSToomas Soome
1401*472cd20dSToomas Soome #endif // TARGET_OS_IPHONE
14024b22b933Srs
DNSServiceResolve(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,const char * name,const char * regtype,const char * domain,DNSServiceResolveReply callBack,void * context)14034b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceResolve
14045ffb0c9bSToomas Soome (
14055ffb0c9bSToomas Soome DNSServiceRef *sdRef,
14065ffb0c9bSToomas Soome DNSServiceFlags flags,
14075ffb0c9bSToomas Soome uint32_t interfaceIndex,
14085ffb0c9bSToomas Soome const char *name,
14095ffb0c9bSToomas Soome const char *regtype,
14105ffb0c9bSToomas Soome const char *domain,
14115ffb0c9bSToomas Soome DNSServiceResolveReply callBack,
14125ffb0c9bSToomas Soome void *context
14135ffb0c9bSToomas Soome )
14145ffb0c9bSToomas Soome {
14155ffb0c9bSToomas Soome char *ptr;
14164b22b933Srs size_t len;
14174b22b933Srs ipc_msg_hdr *hdr;
14184b22b933Srs DNSServiceErrorType err;
14194b22b933Srs
1420c65ebfc7SToomas Soome if (!sdRef || !name || !regtype || !domain || !callBack) return kDNSServiceErr_BadParam;
14215ffb0c9bSToomas Soome
14225ffb0c9bSToomas Soome // Need a real InterfaceID for WakeOnResolve
14235ffb0c9bSToomas Soome if ((flags & kDNSServiceFlagsWakeOnResolve) != 0 &&
14245ffb0c9bSToomas Soome ((interfaceIndex == kDNSServiceInterfaceIndexAny) ||
14255ffb0c9bSToomas Soome (interfaceIndex == kDNSServiceInterfaceIndexLocalOnly) ||
14265ffb0c9bSToomas Soome (interfaceIndex == kDNSServiceInterfaceIndexUnicast) ||
1427c65ebfc7SToomas Soome (interfaceIndex == kDNSServiceInterfaceIndexP2P) ||
1428c65ebfc7SToomas Soome (interfaceIndex == kDNSServiceInterfaceIndexBLE)))
14295ffb0c9bSToomas Soome {
14305ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
14315ffb0c9bSToomas Soome }
14325ffb0c9bSToomas Soome
14335ffb0c9bSToomas Soome if ((interfaceIndex == kDNSServiceInterfaceIndexAny) && includeP2PWithIndexAny())
14345ffb0c9bSToomas Soome flags |= kDNSServiceFlagsIncludeP2P;
14354b22b933Srs
14363b436d06SToomas Soome err = ConnectToServer(sdRef, flags, resolve_request, handle_resolve_response, (void *)callBack, context);
14375ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
14384b22b933Srs
14395ffb0c9bSToomas Soome // Calculate total message length
14404b22b933Srs len = sizeof(flags);
14414b22b933Srs len += sizeof(interfaceIndex);
14424b22b933Srs len += strlen(name) + 1;
14434b22b933Srs len += strlen(regtype) + 1;
14444b22b933Srs len += strlen(domain) + 1;
14454b22b933Srs
14465ffb0c9bSToomas Soome hdr = create_hdr(resolve_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
14475ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
14484b22b933Srs
14494b22b933Srs put_flags(flags, &ptr);
14505ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
14514b22b933Srs put_string(name, &ptr);
14524b22b933Srs put_string(regtype, &ptr);
14534b22b933Srs put_string(domain, &ptr);
14544b22b933Srs
14555ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
1456*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1457*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
1458*472cd20dSToomas Soome {
1459*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
1460*472cd20dSToomas Soome }
1461*472cd20dSToomas Soome #endif
14625ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
14634b22b933Srs return err;
14645ffb0c9bSToomas Soome }
14654b22b933Srs
handle_query_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)14665ffb0c9bSToomas Soome static void handle_query_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
14675ffb0c9bSToomas Soome {
1468*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1469*472cd20dSToomas Soome if (cbh->cb_err == kDNSServiceErr_PolicyDenied && !_should_return_noauth_error())
1470*472cd20dSToomas Soome {
1471*472cd20dSToomas Soome return;
1472*472cd20dSToomas Soome }
1473*472cd20dSToomas Soome #endif
14745ffb0c9bSToomas Soome uint32_t ttl;
14754b22b933Srs char name[kDNSServiceMaxDomainName];
14764b22b933Srs uint16_t rrtype, rrclass, rdlen;
14775ffb0c9bSToomas Soome const char *rdata;
14785ffb0c9bSToomas Soome
14795ffb0c9bSToomas Soome get_string(&data, end, name, kDNSServiceMaxDomainName);
14805ffb0c9bSToomas Soome rrtype = get_uint16(&data, end);
14815ffb0c9bSToomas Soome rrclass = get_uint16(&data, end);
14825ffb0c9bSToomas Soome rdlen = get_uint16(&data, end);
14835ffb0c9bSToomas Soome rdata = get_rdata(&data, end, rdlen);
14845ffb0c9bSToomas Soome ttl = get_uint32(&data, end);
14855ffb0c9bSToomas Soome
14865ffb0c9bSToomas Soome if (!data) syslog(LOG_WARNING, "dnssd_clientstub handle_query_response: error reading result from daemon");
14875ffb0c9bSToomas Soome else ((DNSServiceQueryRecordReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, name, rrtype, rrclass, rdlen, rdata, ttl, sdr->AppContext);
14885ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
14895ffb0c9bSToomas Soome }
14904b22b933Srs
1491*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
get_required_length_for_defaults(const xpc_object_t defaults)1492*472cd20dSToomas Soome static size_t get_required_length_for_defaults(const xpc_object_t defaults)
1493*472cd20dSToomas Soome {
1494*472cd20dSToomas Soome size_t required_len = 0;
1495*472cd20dSToomas Soome size_t plist_data_len = 0;
1496*472cd20dSToomas Soome // Add length for IPC_TLV_TYPE_RESOLVER_CONFIG_PLIST_DATA.
1497*472cd20dSToomas Soome if (xpc_dictionary_get_data(defaults, kDNSServiceDefaultsKey_ResolverConfigPListData, &plist_data_len))
1498*472cd20dSToomas Soome {
1499*472cd20dSToomas Soome required_len += get_required_tlv16_length(plist_data_len);
1500*472cd20dSToomas Soome }
1501*472cd20dSToomas Soome // Add length for IPC_TLV_TYPE_REQUIRE_PRIVACY.
1502*472cd20dSToomas Soome required_len += get_required_tlv16_length(sizeof(uint8_t));
1503*472cd20dSToomas Soome return required_len;
1504*472cd20dSToomas Soome }
1505*472cd20dSToomas Soome
put_tlvs_for_defaults(const xpc_object_t defaults,ipc_msg_hdr * const hdr,char ** ptr)1506*472cd20dSToomas Soome static void put_tlvs_for_defaults(const xpc_object_t defaults, ipc_msg_hdr *const hdr, char **ptr)
1507*472cd20dSToomas Soome {
1508*472cd20dSToomas Soome uint8_t require_privacy;
1509*472cd20dSToomas Soome size_t plist_data_len = 0;
1510*472cd20dSToomas Soome const uint8_t *const plist_data_ptr = xpc_dictionary_get_data(defaults,
1511*472cd20dSToomas Soome kDNSServiceDefaultsKey_ResolverConfigPListData, &plist_data_len);
1512*472cd20dSToomas Soome if (plist_data_ptr)
1513*472cd20dSToomas Soome {
1514*472cd20dSToomas Soome put_tlv16(IPC_TLV_TYPE_RESOLVER_CONFIG_PLIST_DATA, (uint16_t)plist_data_len, plist_data_ptr, ptr);
1515*472cd20dSToomas Soome }
1516*472cd20dSToomas Soome require_privacy = xpc_dictionary_get_bool(defaults, kDNSServiceDefaultsKey_RequirePrivacy) ? 1 : 0;
1517*472cd20dSToomas Soome put_tlv16(IPC_TLV_TYPE_REQUIRE_PRIVACY, sizeof(require_privacy), &require_privacy, ptr);
1518*472cd20dSToomas Soome hdr->ipc_flags |= IPC_FLAGS_TRAILING_TLVS;
1519*472cd20dSToomas Soome }
1520*472cd20dSToomas Soome #endif
1521*472cd20dSToomas Soome
DNSServiceQueryRecord(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,const char * name,uint16_t rrtype,uint16_t rrclass,DNSServiceQueryRecordReply callBack,void * context)15224b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceQueryRecord
15235ffb0c9bSToomas Soome (
15244b22b933Srs DNSServiceRef *sdRef,
15255ffb0c9bSToomas Soome DNSServiceFlags flags,
15265ffb0c9bSToomas Soome uint32_t interfaceIndex,
15274b22b933Srs const char *name,
15285ffb0c9bSToomas Soome uint16_t rrtype,
15295ffb0c9bSToomas Soome uint16_t rrclass,
15305ffb0c9bSToomas Soome DNSServiceQueryRecordReply callBack,
15314b22b933Srs void *context
15325ffb0c9bSToomas Soome )
15335ffb0c9bSToomas Soome {
15345ffb0c9bSToomas Soome char *ptr;
15354b22b933Srs size_t len;
15364b22b933Srs ipc_msg_hdr *hdr;
15374b22b933Srs DNSServiceErrorType err;
1538*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1539*472cd20dSToomas Soome xpc_object_t defaults;
1540*472cd20dSToomas Soome #endif
1541c65ebfc7SToomas Soome // NULL name handled below.
1542c65ebfc7SToomas Soome if (!sdRef || !callBack) return kDNSServiceErr_BadParam;
1543c65ebfc7SToomas Soome
15445ffb0c9bSToomas Soome if ((interfaceIndex == kDNSServiceInterfaceIndexAny) && includeP2PWithIndexAny())
15455ffb0c9bSToomas Soome flags |= kDNSServiceFlagsIncludeP2P;
15465ffb0c9bSToomas Soome
15473b436d06SToomas Soome err = ConnectToServer(sdRef, flags, query_request, handle_query_response, (void *)callBack, context);
15485ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
15494b22b933Srs
15504b22b933Srs if (!name) name = "\0";
15514b22b933Srs
15525ffb0c9bSToomas Soome // Calculate total message length
15534b22b933Srs len = sizeof(flags);
15545ffb0c9bSToomas Soome len += sizeof(uint32_t); // interfaceIndex
15554b22b933Srs len += strlen(name) + 1;
15564b22b933Srs len += 2 * sizeof(uint16_t); // rrtype, rrclass
1557*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1558*472cd20dSToomas Soome defaults = DNSServiceGetRetainedResolverDefaults();
1559*472cd20dSToomas Soome if (defaults)
1560*472cd20dSToomas Soome {
1561*472cd20dSToomas Soome len += get_required_length_for_defaults(defaults);
1562*472cd20dSToomas Soome }
1563*472cd20dSToomas Soome #endif
15645ffb0c9bSToomas Soome hdr = create_hdr(query_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
1565*472cd20dSToomas Soome if (!hdr)
1566*472cd20dSToomas Soome {
1567*472cd20dSToomas Soome DNSServiceRefDeallocate(*sdRef);
1568*472cd20dSToomas Soome *sdRef = NULL;
1569*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1570*472cd20dSToomas Soome xpc_forget(&defaults);
1571*472cd20dSToomas Soome #endif
1572*472cd20dSToomas Soome return kDNSServiceErr_NoMemory;
1573*472cd20dSToomas Soome }
15744b22b933Srs put_flags(flags, &ptr);
15755ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
15764b22b933Srs put_string(name, &ptr);
15775ffb0c9bSToomas Soome put_uint16(rrtype, &ptr);
15785ffb0c9bSToomas Soome put_uint16(rrclass, &ptr);
1579*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1580*472cd20dSToomas Soome if (defaults)
1581*472cd20dSToomas Soome {
1582*472cd20dSToomas Soome put_tlvs_for_defaults(defaults, hdr, &ptr);
1583*472cd20dSToomas Soome xpc_forget(&defaults);
1584*472cd20dSToomas Soome }
1585*472cd20dSToomas Soome #endif
15865ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
1587*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1588*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
1589*472cd20dSToomas Soome {
1590*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
1591*472cd20dSToomas Soome }
1592*472cd20dSToomas Soome #endif
15935ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
15945ffb0c9bSToomas Soome return err;
15955ffb0c9bSToomas Soome }
15965ffb0c9bSToomas Soome
handle_addrinfo_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)15975ffb0c9bSToomas Soome static void handle_addrinfo_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
15985ffb0c9bSToomas Soome {
1599*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1600*472cd20dSToomas Soome if (cbh->cb_err == kDNSServiceErr_PolicyDenied && !_should_return_noauth_error())
1601*472cd20dSToomas Soome {
1602*472cd20dSToomas Soome return;
1603*472cd20dSToomas Soome }
1604*472cd20dSToomas Soome #endif
16055ffb0c9bSToomas Soome char hostname[kDNSServiceMaxDomainName];
1606cda73f64SToomas Soome uint16_t rrtype, rrclass, rdlen;
16075ffb0c9bSToomas Soome const char *rdata;
16085ffb0c9bSToomas Soome uint32_t ttl;
16095ffb0c9bSToomas Soome
16105ffb0c9bSToomas Soome get_string(&data, end, hostname, kDNSServiceMaxDomainName);
16115ffb0c9bSToomas Soome rrtype = get_uint16(&data, end);
1612cda73f64SToomas Soome rrclass = get_uint16(&data, end);
16135ffb0c9bSToomas Soome rdlen = get_uint16(&data, end);
16145ffb0c9bSToomas Soome rdata = get_rdata (&data, end, rdlen);
16155ffb0c9bSToomas Soome ttl = get_uint32(&data, end);
1616cda73f64SToomas Soome (void)rrclass; // Unused
16175ffb0c9bSToomas Soome
16185ffb0c9bSToomas Soome // We only generate client callbacks for A and AAAA results (including NXDOMAIN results for
16195ffb0c9bSToomas Soome // those types, if the client has requested those with the kDNSServiceFlagsReturnIntermediates).
16205ffb0c9bSToomas Soome // Other result types, specifically CNAME referrals, are not communicated to the client, because
16215ffb0c9bSToomas Soome // the DNSServiceGetAddrInfoReply interface doesn't have any meaningful way to communiate CNAME referrals.
16225ffb0c9bSToomas Soome if (!data) syslog(LOG_WARNING, "dnssd_clientstub handle_addrinfo_response: error reading result from daemon");
16235ffb0c9bSToomas Soome else if (rrtype == kDNSServiceType_A || rrtype == kDNSServiceType_AAAA)
16245ffb0c9bSToomas Soome {
16255ffb0c9bSToomas Soome struct sockaddr_in sa4;
16265ffb0c9bSToomas Soome struct sockaddr_in6 sa6;
16275ffb0c9bSToomas Soome const struct sockaddr *const sa = (rrtype == kDNSServiceType_A) ? (struct sockaddr*)&sa4 : (struct sockaddr*)&sa6;
16285ffb0c9bSToomas Soome if (rrtype == kDNSServiceType_A)
16294b22b933Srs {
16305ffb0c9bSToomas Soome memset(&sa4, 0, sizeof(sa4));
16315ffb0c9bSToomas Soome #ifndef NOT_HAVE_SA_LEN
16325ffb0c9bSToomas Soome sa4.sin_len = sizeof(struct sockaddr_in);
16335ffb0c9bSToomas Soome #endif
16345ffb0c9bSToomas Soome sa4.sin_family = AF_INET;
16355ffb0c9bSToomas Soome // sin_port = 0;
16365ffb0c9bSToomas Soome if (!cbh->cb_err) memcpy(&sa4.sin_addr, rdata, rdlen);
16375ffb0c9bSToomas Soome }
16385ffb0c9bSToomas Soome else
16395ffb0c9bSToomas Soome {
16405ffb0c9bSToomas Soome memset(&sa6, 0, sizeof(sa6));
16415ffb0c9bSToomas Soome #ifndef NOT_HAVE_SA_LEN
16425ffb0c9bSToomas Soome sa6.sin6_len = sizeof(struct sockaddr_in6);
16435ffb0c9bSToomas Soome #endif
16445ffb0c9bSToomas Soome sa6.sin6_family = AF_INET6;
16455ffb0c9bSToomas Soome // sin6_port = 0;
16465ffb0c9bSToomas Soome // sin6_flowinfo = 0;
16475ffb0c9bSToomas Soome // sin6_scope_id = 0;
16485ffb0c9bSToomas Soome if (!cbh->cb_err)
16495ffb0c9bSToomas Soome {
16505ffb0c9bSToomas Soome memcpy(&sa6.sin6_addr, rdata, rdlen);
16515ffb0c9bSToomas Soome if (IN6_IS_ADDR_LINKLOCAL(&sa6.sin6_addr)) sa6.sin6_scope_id = cbh->cb_interface;
16525ffb0c9bSToomas Soome }
16534b22b933Srs }
1654*472cd20dSToomas Soome
1655*472cd20dSToomas Soome ((DNSServiceGetAddrInfoReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, hostname, sa, ttl, sdr->AppContext);
1656*472cd20dSToomas Soome }
1657*472cd20dSToomas Soome else if (cbh->cb_err == kDNSServiceErr_PolicyDenied)
1658*472cd20dSToomas Soome {
1659*472cd20dSToomas Soome ((DNSServiceGetAddrInfoReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, hostname, NULL, ttl, sdr->AppContext);
16605ffb0c9bSToomas Soome }
16615ffb0c9bSToomas Soome }
16624b22b933Srs
DNSServiceGetAddrInfo(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,uint32_t protocol,const char * hostname,DNSServiceGetAddrInfoReply callBack,void * context)16635ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceGetAddrInfo
16645ffb0c9bSToomas Soome (
16655ffb0c9bSToomas Soome DNSServiceRef *sdRef,
16665ffb0c9bSToomas Soome DNSServiceFlags flags,
16675ffb0c9bSToomas Soome uint32_t interfaceIndex,
16685ffb0c9bSToomas Soome uint32_t protocol,
16695ffb0c9bSToomas Soome const char *hostname,
16705ffb0c9bSToomas Soome DNSServiceGetAddrInfoReply callBack,
16715ffb0c9bSToomas Soome void *context /* may be NULL */
16725ffb0c9bSToomas Soome )
16735ffb0c9bSToomas Soome {
16745ffb0c9bSToomas Soome char *ptr;
16755ffb0c9bSToomas Soome size_t len;
16765ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
16775ffb0c9bSToomas Soome DNSServiceErrorType err;
1678*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1679*472cd20dSToomas Soome xpc_object_t defaults;
1680*472cd20dSToomas Soome #endif
16814b22b933Srs
1682c65ebfc7SToomas Soome if (!sdRef || !hostname || !callBack) return kDNSServiceErr_BadParam;
16834b22b933Srs
16843b436d06SToomas Soome err = ConnectToServer(sdRef, flags, addrinfo_request, handle_addrinfo_response, (void *)callBack, context);
16855ffb0c9bSToomas Soome if (err)
16864b22b933Srs {
16875ffb0c9bSToomas Soome return err; // On error ConnectToServer leaves *sdRef set to NULL
16884b22b933Srs }
16894b22b933Srs
16905ffb0c9bSToomas Soome // Calculate total message length
16915ffb0c9bSToomas Soome len = sizeof(flags);
16925ffb0c9bSToomas Soome len += sizeof(uint32_t); // interfaceIndex
16935ffb0c9bSToomas Soome len += sizeof(uint32_t); // protocol
16945ffb0c9bSToomas Soome len += strlen(hostname) + 1;
1695*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1696*472cd20dSToomas Soome defaults = DNSServiceGetRetainedResolverDefaults();
1697*472cd20dSToomas Soome if (defaults)
1698*472cd20dSToomas Soome {
1699*472cd20dSToomas Soome len += get_required_length_for_defaults(defaults);
1700*472cd20dSToomas Soome }
1701*472cd20dSToomas Soome #endif
17025ffb0c9bSToomas Soome hdr = create_hdr(addrinfo_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
1703*472cd20dSToomas Soome if (!hdr)
1704*472cd20dSToomas Soome {
1705*472cd20dSToomas Soome DNSServiceRefDeallocate(*sdRef);
1706*472cd20dSToomas Soome *sdRef = NULL;
1707*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1708*472cd20dSToomas Soome xpc_forget(&defaults);
1709*472cd20dSToomas Soome #endif
1710*472cd20dSToomas Soome return kDNSServiceErr_NoMemory;
1711*472cd20dSToomas Soome }
17125ffb0c9bSToomas Soome put_flags(flags, &ptr);
17135ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
17145ffb0c9bSToomas Soome put_uint32(protocol, &ptr);
17155ffb0c9bSToomas Soome put_string(hostname, &ptr);
1716*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder
1717*472cd20dSToomas Soome if (defaults)
1718*472cd20dSToomas Soome {
1719*472cd20dSToomas Soome put_tlvs_for_defaults(defaults, hdr, &ptr);
1720*472cd20dSToomas Soome xpc_forget(&defaults);
1721*472cd20dSToomas Soome }
1722*472cd20dSToomas Soome #endif
17235ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
1724*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1725*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
1726*472cd20dSToomas Soome {
1727*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
1728*472cd20dSToomas Soome }
1729*472cd20dSToomas Soome #endif
17305ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
17315ffb0c9bSToomas Soome return err;
17325ffb0c9bSToomas Soome }
17335ffb0c9bSToomas Soome
handle_browse_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)17345ffb0c9bSToomas Soome static void handle_browse_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
17355ffb0c9bSToomas Soome {
1736*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1737*472cd20dSToomas Soome if (cbh->cb_err == kDNSServiceErr_PolicyDenied && !_should_return_noauth_error())
1738*472cd20dSToomas Soome {
1739*472cd20dSToomas Soome return;
1740*472cd20dSToomas Soome }
1741*472cd20dSToomas Soome #endif
17425ffb0c9bSToomas Soome char replyName[256], replyType[kDNSServiceMaxDomainName], replyDomain[kDNSServiceMaxDomainName];
17435ffb0c9bSToomas Soome get_string(&data, end, replyName, 256);
17445ffb0c9bSToomas Soome get_string(&data, end, replyType, kDNSServiceMaxDomainName);
17455ffb0c9bSToomas Soome get_string(&data, end, replyDomain, kDNSServiceMaxDomainName);
17465ffb0c9bSToomas Soome if (!data) syslog(LOG_WARNING, "dnssd_clientstub handle_browse_response: error reading result from daemon");
17475ffb0c9bSToomas Soome else ((DNSServiceBrowseReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, replyName, replyType, replyDomain, sdr->AppContext);
17485ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
17495ffb0c9bSToomas Soome }
17505ffb0c9bSToomas Soome
DNSServiceBrowse(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,const char * regtype,const char * domain,DNSServiceBrowseReply callBack,void * context)17514b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceBrowse
17525ffb0c9bSToomas Soome (
17535ffb0c9bSToomas Soome DNSServiceRef *sdRef,
17545ffb0c9bSToomas Soome DNSServiceFlags flags,
17555ffb0c9bSToomas Soome uint32_t interfaceIndex,
17565ffb0c9bSToomas Soome const char *regtype,
17575ffb0c9bSToomas Soome const char *domain,
17585ffb0c9bSToomas Soome DNSServiceBrowseReply callBack,
17595ffb0c9bSToomas Soome void *context
17605ffb0c9bSToomas Soome )
17615ffb0c9bSToomas Soome {
17625ffb0c9bSToomas Soome char *ptr;
17634b22b933Srs size_t len;
17644b22b933Srs ipc_msg_hdr *hdr;
17654b22b933Srs DNSServiceErrorType err;
17664b22b933Srs
1767c65ebfc7SToomas Soome // NULL domain handled below
1768c65ebfc7SToomas Soome if (!sdRef || !regtype || !callBack) return kDNSServiceErr_BadParam;
1769c65ebfc7SToomas Soome
17705ffb0c9bSToomas Soome if ((interfaceIndex == kDNSServiceInterfaceIndexAny) && includeP2PWithIndexAny())
17715ffb0c9bSToomas Soome flags |= kDNSServiceFlagsIncludeP2P;
17724b22b933Srs
17733b436d06SToomas Soome err = ConnectToServer(sdRef, flags, browse_request, handle_browse_response, (void *)callBack, context);
17745ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
17754b22b933Srs
17765ffb0c9bSToomas Soome if (!domain) domain = "";
17774b22b933Srs len = sizeof(flags);
17784b22b933Srs len += sizeof(interfaceIndex);
17794b22b933Srs len += strlen(regtype) + 1;
17804b22b933Srs len += strlen(domain) + 1;
17814b22b933Srs
17825ffb0c9bSToomas Soome hdr = create_hdr(browse_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
17835ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
17845ffb0c9bSToomas Soome
17854b22b933Srs put_flags(flags, &ptr);
17865ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
17874b22b933Srs put_string(regtype, &ptr);
17884b22b933Srs put_string(domain, &ptr);
17894b22b933Srs
17905ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
1791*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1792*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
1793*472cd20dSToomas Soome {
1794*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
1795*472cd20dSToomas Soome }
1796*472cd20dSToomas Soome #endif
17975ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
17984b22b933Srs return err;
17995ffb0c9bSToomas Soome }
18004b22b933Srs
DNSServiceSetDefaultDomainForUser(DNSServiceFlags flags,const char * domain)18015ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceSetDefaultDomainForUser(DNSServiceFlags flags, const char *domain)
18025ffb0c9bSToomas Soome {
1803c65ebfc7SToomas Soome DNSServiceErrorType err;
18045ffb0c9bSToomas Soome DNSServiceOp *tmp;
18055ffb0c9bSToomas Soome char *ptr;
1806c65ebfc7SToomas Soome size_t len;
18075ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
1808c65ebfc7SToomas Soome
1809c65ebfc7SToomas Soome if (!domain) return kDNSServiceErr_BadParam;
1810c65ebfc7SToomas Soome len = sizeof(flags) + strlen(domain) + 1;
1811c65ebfc7SToomas Soome
1812c65ebfc7SToomas Soome err = ConnectToServer(&tmp, 0, setdomain_request, NULL, NULL, NULL);
18135ffb0c9bSToomas Soome if (err) return err;
18145ffb0c9bSToomas Soome
18155ffb0c9bSToomas Soome hdr = create_hdr(setdomain_request, &len, &ptr, 0, tmp);
18165ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(tmp); return kDNSServiceErr_NoMemory; }
18174b22b933Srs
18184b22b933Srs put_flags(flags, &ptr);
18194b22b933Srs put_string(domain, &ptr);
18205ffb0c9bSToomas Soome err = deliver_request(hdr, tmp); // Will free hdr for us
18215ffb0c9bSToomas Soome DNSServiceRefDeallocate(tmp);
18225ffb0c9bSToomas Soome return err;
18235ffb0c9bSToomas Soome }
18244b22b933Srs
handle_regservice_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)18255ffb0c9bSToomas Soome static void handle_regservice_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
18265ffb0c9bSToomas Soome {
1827*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1828*472cd20dSToomas Soome if (cbh->cb_err == kDNSServiceErr_PolicyDenied && !_should_return_noauth_error())
1829*472cd20dSToomas Soome {
1830*472cd20dSToomas Soome return;
1831*472cd20dSToomas Soome }
1832*472cd20dSToomas Soome #endif
18334b22b933Srs char name[256], regtype[kDNSServiceMaxDomainName], domain[kDNSServiceMaxDomainName];
18345ffb0c9bSToomas Soome get_string(&data, end, name, 256);
18355ffb0c9bSToomas Soome get_string(&data, end, regtype, kDNSServiceMaxDomainName);
18365ffb0c9bSToomas Soome get_string(&data, end, domain, kDNSServiceMaxDomainName);
18375ffb0c9bSToomas Soome if (!data) syslog(LOG_WARNING, "dnssd_clientstub handle_regservice_response: error reading result from daemon");
18385ffb0c9bSToomas Soome else ((DNSServiceRegisterReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_err, name, regtype, domain, sdr->AppContext);
18395ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
18405ffb0c9bSToomas Soome }
18414b22b933Srs
DNSServiceRegister(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,const char * name,const char * regtype,const char * domain,const char * host,uint16_t PortInNetworkByteOrder,uint16_t txtLen,const void * txtRecord,DNSServiceRegisterReply callBack,void * context)18424b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceRegister
18435ffb0c9bSToomas Soome (
18444b22b933Srs DNSServiceRef *sdRef,
18455ffb0c9bSToomas Soome DNSServiceFlags flags,
18465ffb0c9bSToomas Soome uint32_t interfaceIndex,
18474b22b933Srs const char *name,
18484b22b933Srs const char *regtype,
18494b22b933Srs const char *domain,
18504b22b933Srs const char *host,
18515ffb0c9bSToomas Soome uint16_t PortInNetworkByteOrder,
18525ffb0c9bSToomas Soome uint16_t txtLen,
18534b22b933Srs const void *txtRecord,
18545ffb0c9bSToomas Soome DNSServiceRegisterReply callBack,
18554b22b933Srs void *context
18565ffb0c9bSToomas Soome )
18575ffb0c9bSToomas Soome {
18585ffb0c9bSToomas Soome char *ptr;
18594b22b933Srs size_t len;
18604b22b933Srs ipc_msg_hdr *hdr;
18614b22b933Srs DNSServiceErrorType err;
18624b22b933Srs union { uint16_t s; u_char b[2]; } port = { PortInNetworkByteOrder };
18634b22b933Srs
1864c65ebfc7SToomas Soome if (!sdRef || !regtype) return kDNSServiceErr_BadParam;
18654b22b933Srs if (!name) name = "";
18664b22b933Srs if (!domain) domain = "";
18674b22b933Srs if (!host) host = "";
18684b22b933Srs if (!txtRecord) txtRecord = (void*)"";
18694b22b933Srs
18705ffb0c9bSToomas Soome // No callback must have auto-rename
18714b22b933Srs if (!callBack && (flags & kDNSServiceFlagsNoAutoRename)) return kDNSServiceErr_BadParam;
18724b22b933Srs
18735ffb0c9bSToomas Soome if ((interfaceIndex == kDNSServiceInterfaceIndexAny) && includeP2PWithIndexAny())
18745ffb0c9bSToomas Soome flags |= kDNSServiceFlagsIncludeP2P;
18755ffb0c9bSToomas Soome
18763b436d06SToomas Soome err = ConnectToServer(sdRef, flags, reg_service_request, callBack ? handle_regservice_response : NULL, (void *)callBack, context);
18775ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
18785ffb0c9bSToomas Soome
18794b22b933Srs len = sizeof(DNSServiceFlags);
18804b22b933Srs len += sizeof(uint32_t); // interfaceIndex
18814b22b933Srs len += strlen(name) + strlen(regtype) + strlen(domain) + strlen(host) + 4;
18824b22b933Srs len += 2 * sizeof(uint16_t); // port, txtLen
18834b22b933Srs len += txtLen;
18844b22b933Srs
18855ffb0c9bSToomas Soome hdr = create_hdr(reg_service_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
18865ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
1887cda73f64SToomas Soome if (!callBack) hdr->ipc_flags |= IPC_FLAGS_NOREPLY;
18885ffb0c9bSToomas Soome
18894b22b933Srs put_flags(flags, &ptr);
18905ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
18914b22b933Srs put_string(name, &ptr);
18924b22b933Srs put_string(regtype, &ptr);
18934b22b933Srs put_string(domain, &ptr);
18944b22b933Srs put_string(host, &ptr);
18954b22b933Srs *ptr++ = port.b[0];
18964b22b933Srs *ptr++ = port.b[1];
18975ffb0c9bSToomas Soome put_uint16(txtLen, &ptr);
18984b22b933Srs put_rdata(txtLen, txtRecord, &ptr);
18994b22b933Srs
19005ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
1901*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1902*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
1903*472cd20dSToomas Soome {
1904*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
1905*472cd20dSToomas Soome }
1906*472cd20dSToomas Soome #endif
19075ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
19084b22b933Srs return err;
19095ffb0c9bSToomas Soome }
19104b22b933Srs
handle_enumeration_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)19115ffb0c9bSToomas Soome static void handle_enumeration_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
19125ffb0c9bSToomas Soome {
19134b22b933Srs char domain[kDNSServiceMaxDomainName];
19145ffb0c9bSToomas Soome get_string(&data, end, domain, kDNSServiceMaxDomainName);
19155ffb0c9bSToomas Soome if (!data) syslog(LOG_WARNING, "dnssd_clientstub handle_enumeration_response: error reading result from daemon");
19165ffb0c9bSToomas Soome else ((DNSServiceDomainEnumReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, domain, sdr->AppContext);
19175ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
19185ffb0c9bSToomas Soome }
19194b22b933Srs
DNSServiceEnumerateDomains(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,DNSServiceDomainEnumReply callBack,void * context)19204b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceEnumerateDomains
19215ffb0c9bSToomas Soome (
19225ffb0c9bSToomas Soome DNSServiceRef *sdRef,
19235ffb0c9bSToomas Soome DNSServiceFlags flags,
19245ffb0c9bSToomas Soome uint32_t interfaceIndex,
19255ffb0c9bSToomas Soome DNSServiceDomainEnumReply callBack,
19265ffb0c9bSToomas Soome void *context
19275ffb0c9bSToomas Soome )
19285ffb0c9bSToomas Soome {
19295ffb0c9bSToomas Soome char *ptr;
19304b22b933Srs size_t len;
19314b22b933Srs ipc_msg_hdr *hdr;
19324b22b933Srs DNSServiceErrorType err;
1933c65ebfc7SToomas Soome int f1;
1934c65ebfc7SToomas Soome int f2;
19355ffb0c9bSToomas Soome
1936c65ebfc7SToomas Soome if (!sdRef || !callBack) return kDNSServiceErr_BadParam;
1937c65ebfc7SToomas Soome
1938c65ebfc7SToomas Soome f1 = (flags & kDNSServiceFlagsBrowseDomains) != 0;
1939c65ebfc7SToomas Soome f2 = (flags & kDNSServiceFlagsRegistrationDomains) != 0;
19404b22b933Srs if (f1 + f2 != 1) return kDNSServiceErr_BadParam;
19414b22b933Srs
19423b436d06SToomas Soome err = ConnectToServer(sdRef, flags, enumeration_request, handle_enumeration_response, (void *)callBack, context);
19435ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
19444b22b933Srs
19455ffb0c9bSToomas Soome len = sizeof(DNSServiceFlags);
19464b22b933Srs len += sizeof(uint32_t);
19474b22b933Srs
19485ffb0c9bSToomas Soome hdr = create_hdr(enumeration_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
19495ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
19504b22b933Srs
19514b22b933Srs put_flags(flags, &ptr);
19525ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
19534b22b933Srs
19545ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
19555ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
19565ffb0c9bSToomas Soome return err;
19575ffb0c9bSToomas Soome }
19585ffb0c9bSToomas Soome
ConnectionResponse(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * const data,const char * const end)19595ffb0c9bSToomas Soome static void ConnectionResponse(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *const data, const char *const end)
19605ffb0c9bSToomas Soome {
19615ffb0c9bSToomas Soome (void)data; // Unused
19625ffb0c9bSToomas Soome
19635ffb0c9bSToomas Soome //printf("ConnectionResponse got %d\n", cbh->ipc_hdr.op);
19645ffb0c9bSToomas Soome if (cbh->ipc_hdr.op != reg_record_reply_op)
19655ffb0c9bSToomas Soome {
19665ffb0c9bSToomas Soome // When using kDNSServiceFlagsShareConnection, need to search the list of associated DNSServiceOps
19675ffb0c9bSToomas Soome // to find the one this response is intended for, and then call through to its ProcessReply handler.
19685ffb0c9bSToomas Soome // We start with our first subordinate DNSServiceRef -- don't want to accidentally match the parent DNSServiceRef.
19695ffb0c9bSToomas Soome DNSServiceOp *op = sdr->next;
19705ffb0c9bSToomas Soome while (op && (op->uid.u32[0] != cbh->ipc_hdr.client_context.u32[0] || op->uid.u32[1] != cbh->ipc_hdr.client_context.u32[1]))
19715ffb0c9bSToomas Soome op = op->next;
19725ffb0c9bSToomas Soome // Note: We may sometimes not find a matching DNSServiceOp, in the case where the client has
19735ffb0c9bSToomas Soome // cancelled the subordinate DNSServiceOp, but there are still messages in the pipeline from the daemon
19745ffb0c9bSToomas Soome if (op && op->ProcessReply) op->ProcessReply(op, cbh, data, end);
19755ffb0c9bSToomas Soome // WARNING: Don't touch op or sdr after this -- client may have called DNSServiceRefDeallocate
19765ffb0c9bSToomas Soome return;
19775ffb0c9bSToomas Soome }
19785ffb0c9bSToomas Soome else
19795ffb0c9bSToomas Soome {
1980*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
1981*472cd20dSToomas Soome if (cbh->cb_err == kDNSServiceErr_PolicyDenied && !_should_return_noauth_error())
1982*472cd20dSToomas Soome {
1983*472cd20dSToomas Soome return;
1984*472cd20dSToomas Soome }
1985*472cd20dSToomas Soome #endif
19865ffb0c9bSToomas Soome DNSRecordRef rec;
19875ffb0c9bSToomas Soome for (rec = sdr->rec; rec; rec = rec->recnext)
19884b22b933Srs {
19895ffb0c9bSToomas Soome if (rec->uid.u32[0] == cbh->ipc_hdr.client_context.u32[0] && rec->uid.u32[1] == cbh->ipc_hdr.client_context.u32[1])
19905ffb0c9bSToomas Soome break;
19915ffb0c9bSToomas Soome }
19925ffb0c9bSToomas Soome // The record might have been freed already and hence not an
19935ffb0c9bSToomas Soome // error if the record is not found.
19945ffb0c9bSToomas Soome if (!rec)
19955ffb0c9bSToomas Soome {
1996*472cd20dSToomas Soome syslog(LOG_INFO, "dnssd_clientstub ConnectionResponse: Record not found");
19975ffb0c9bSToomas Soome return;
19985ffb0c9bSToomas Soome }
19995ffb0c9bSToomas Soome if (rec->sdr != sdr)
20005ffb0c9bSToomas Soome {
2001*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectionResponse: Record sdr mismatch: rec %p sdr %p", rec->sdr, sdr);
20025ffb0c9bSToomas Soome return;
20034b22b933Srs }
20044b22b933Srs
20055ffb0c9bSToomas Soome if (sdr->op == connection_request || sdr->op == connection_delegate_request)
20065ffb0c9bSToomas Soome {
20075ffb0c9bSToomas Soome rec->AppCallback(rec->sdr, rec, cbh->cb_flags, cbh->cb_err, rec->AppContext);
20085ffb0c9bSToomas Soome }
20095ffb0c9bSToomas Soome else
20105ffb0c9bSToomas Soome {
20115ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub ConnectionResponse: sdr->op != connection_request");
20125ffb0c9bSToomas Soome rec->AppCallback(rec->sdr, rec, 0, kDNSServiceErr_Unknown, rec->AppContext);
20135ffb0c9bSToomas Soome }
20145ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
20155ffb0c9bSToomas Soome }
20165ffb0c9bSToomas Soome }
20175ffb0c9bSToomas Soome
DNSServiceCreateConnection(DNSServiceRef * sdRef)20185ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceCreateConnection(DNSServiceRef *sdRef)
20195ffb0c9bSToomas Soome {
2020c65ebfc7SToomas Soome DNSServiceErrorType err;
20215ffb0c9bSToomas Soome char *ptr;
20225ffb0c9bSToomas Soome size_t len = 0;
20235ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
2024c65ebfc7SToomas Soome
2025c65ebfc7SToomas Soome if (!sdRef) return kDNSServiceErr_BadParam;
2026c65ebfc7SToomas Soome err = ConnectToServer(sdRef, 0, connection_request, ConnectionResponse, NULL, NULL);
20275ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
20285ffb0c9bSToomas Soome
20295ffb0c9bSToomas Soome hdr = create_hdr(connection_request, &len, &ptr, 0, *sdRef);
20305ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
20315ffb0c9bSToomas Soome
20325ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
20335ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
20344b22b933Srs return err;
20355ffb0c9bSToomas Soome }
20365ffb0c9bSToomas Soome
2037*472cd20dSToomas Soome #if APPLE_OSX_mDNSResponder && !TARGET_OS_SIMULATOR
DNSServiceCreateDelegateConnection(DNSServiceRef * sdRef,int32_t pid,uuid_t uuid)20385ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceCreateDelegateConnection(DNSServiceRef *sdRef, int32_t pid, uuid_t uuid)
20395ffb0c9bSToomas Soome {
20405ffb0c9bSToomas Soome char *ptr;
20415ffb0c9bSToomas Soome size_t len = 0;
20425ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
20434b22b933Srs
2044c65ebfc7SToomas Soome if (!sdRef) return kDNSServiceErr_BadParam;
20455ffb0c9bSToomas Soome DNSServiceErrorType err = ConnectToServer(sdRef, 0, connection_delegate_request, ConnectionResponse, NULL, NULL);
20465ffb0c9bSToomas Soome if (err)
20475ffb0c9bSToomas Soome {
20485ffb0c9bSToomas Soome return err; // On error ConnectToServer leaves *sdRef set to NULL
20494b22b933Srs }
20504b22b933Srs
2051c65ebfc7SToomas Soome // Only one of the two options can be set. If pid is zero, uuid is used.
20525ffb0c9bSToomas Soome // If both are specified only pid will be used. We send across the pid
20535ffb0c9bSToomas Soome // so that the daemon knows what to read from the socket.
20545ffb0c9bSToomas Soome
20555ffb0c9bSToomas Soome len += sizeof(int32_t);
20565ffb0c9bSToomas Soome
20575ffb0c9bSToomas Soome hdr = create_hdr(connection_delegate_request, &len, &ptr, 0, *sdRef);
20585ffb0c9bSToomas Soome if (!hdr)
20594b22b933Srs {
20605ffb0c9bSToomas Soome DNSServiceRefDeallocate(*sdRef);
20615ffb0c9bSToomas Soome *sdRef = NULL;
20625ffb0c9bSToomas Soome return kDNSServiceErr_NoMemory;
20635ffb0c9bSToomas Soome }
20644b22b933Srs
20655ffb0c9bSToomas Soome if (pid && setsockopt((*sdRef)->sockfd, SOL_SOCKET, SO_DELEGATED, &pid, sizeof(pid)) == -1)
2066*472cd20dSToomas Soome {
2067*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceCreateDelegateConnection: Could not setsockopt() for PID[%d], no entitlements or process(pid) invalid errno:%d (%s)", pid, errno, strerror(errno));
2068*472cd20dSToomas Soome // Free the hdr in case we return before calling deliver_request()
20695ffb0c9bSToomas Soome if (hdr)
20705ffb0c9bSToomas Soome free(hdr);
20715ffb0c9bSToomas Soome DNSServiceRefDeallocate(*sdRef);
20725ffb0c9bSToomas Soome *sdRef = NULL;
20735ffb0c9bSToomas Soome return kDNSServiceErr_NoAuth;
20745ffb0c9bSToomas Soome }
20754b22b933Srs
20765ffb0c9bSToomas Soome if (!pid && setsockopt((*sdRef)->sockfd, SOL_SOCKET, SO_DELEGATED_UUID, uuid, sizeof(uuid_t)) == -1)
20775ffb0c9bSToomas Soome {
2078*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceCreateDelegateConnection: Could not setsockopt() for UUID, no entitlements or process(uuid) invalid errno:%d (%s) ", errno, strerror(errno));
20795ffb0c9bSToomas Soome // Free the hdr in case we return before calling deliver_request()
20805ffb0c9bSToomas Soome if (hdr)
20815ffb0c9bSToomas Soome free(hdr);
20825ffb0c9bSToomas Soome DNSServiceRefDeallocate(*sdRef);
20835ffb0c9bSToomas Soome *sdRef = NULL;
20845ffb0c9bSToomas Soome return kDNSServiceErr_NoAuth;
20854b22b933Srs }
20864b22b933Srs
20875ffb0c9bSToomas Soome put_uint32(pid, &ptr);
20885ffb0c9bSToomas Soome
20895ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
20905ffb0c9bSToomas Soome if (err)
20914b22b933Srs {
20925ffb0c9bSToomas Soome DNSServiceRefDeallocate(*sdRef);
20935ffb0c9bSToomas Soome *sdRef = NULL;
20944b22b933Srs }
20955ffb0c9bSToomas Soome return err;
20965ffb0c9bSToomas Soome }
2097*472cd20dSToomas Soome #elif TARGET_OS_SIMULATOR // This hack is for Simulator platform only
DNSServiceCreateDelegateConnection(DNSServiceRef * sdRef,int32_t pid,uuid_t uuid)20985ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceCreateDelegateConnection(DNSServiceRef *sdRef, int32_t pid, uuid_t uuid)
20995ffb0c9bSToomas Soome {
21005ffb0c9bSToomas Soome (void) pid;
21015ffb0c9bSToomas Soome (void) uuid;
21025ffb0c9bSToomas Soome return DNSServiceCreateConnection(sdRef);
21035ffb0c9bSToomas Soome }
21045ffb0c9bSToomas Soome #endif
21054b22b933Srs
DNSServiceRegisterRecord(DNSServiceRef sdRef,DNSRecordRef * RecordRef,DNSServiceFlags flags,uint32_t interfaceIndex,const char * fullname,uint16_t rrtype,uint16_t rrclass,uint16_t rdlen,const void * rdata,uint32_t ttl,DNSServiceRegisterRecordReply callBack,void * context)21064b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceRegisterRecord
21075ffb0c9bSToomas Soome (
21085ffb0c9bSToomas Soome DNSServiceRef sdRef,
21094b22b933Srs DNSRecordRef *RecordRef,
21105ffb0c9bSToomas Soome DNSServiceFlags flags,
21115ffb0c9bSToomas Soome uint32_t interfaceIndex,
21124b22b933Srs const char *fullname,
21135ffb0c9bSToomas Soome uint16_t rrtype,
21145ffb0c9bSToomas Soome uint16_t rrclass,
21155ffb0c9bSToomas Soome uint16_t rdlen,
21164b22b933Srs const void *rdata,
21175ffb0c9bSToomas Soome uint32_t ttl,
21185ffb0c9bSToomas Soome DNSServiceRegisterRecordReply callBack,
21194b22b933Srs void *context
21205ffb0c9bSToomas Soome )
21215ffb0c9bSToomas Soome {
2122*472cd20dSToomas Soome DNSServiceErrorType err;
21235ffb0c9bSToomas Soome char *ptr;
21244b22b933Srs size_t len;
21254b22b933Srs ipc_msg_hdr *hdr = NULL;
21264b22b933Srs DNSRecordRef rref = NULL;
21275ffb0c9bSToomas Soome DNSRecord **p;
2128*472cd20dSToomas Soome // Verify that only one of the following flags is set.
21294b22b933Srs int f1 = (flags & kDNSServiceFlagsShared) != 0;
21304b22b933Srs int f2 = (flags & kDNSServiceFlagsUnique) != 0;
2131*472cd20dSToomas Soome int f3 = (flags & kDNSServiceFlagsKnownUnique) != 0;
2132*472cd20dSToomas Soome if (f1 + f2 + f3 != 1) return kDNSServiceErr_BadParam;
21334b22b933Srs
21345ffb0c9bSToomas Soome if ((interfaceIndex == kDNSServiceInterfaceIndexAny) && includeP2PWithIndexAny())
21355ffb0c9bSToomas Soome flags |= kDNSServiceFlagsIncludeP2P;
21365ffb0c9bSToomas Soome
2137c65ebfc7SToomas Soome if (!sdRef || !RecordRef || !fullname || (!rdata && rdlen) || !callBack)
2138c65ebfc7SToomas Soome {
2139c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRegisterRecord called with NULL parameter");
2140c65ebfc7SToomas Soome return kDNSServiceErr_BadParam;
2141c65ebfc7SToomas Soome }
21425ffb0c9bSToomas Soome
21435ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
21445ffb0c9bSToomas Soome {
21455ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRegisterRecord called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
21465ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
21475ffb0c9bSToomas Soome }
21485ffb0c9bSToomas Soome
21495ffb0c9bSToomas Soome if (sdRef->op != connection_request && sdRef->op != connection_delegate_request)
21505ffb0c9bSToomas Soome {
21515ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRegisterRecord called with non-DNSServiceCreateConnection DNSServiceRef %p %d", sdRef, sdRef->op);
21524b22b933Srs return kDNSServiceErr_BadReference;
21535ffb0c9bSToomas Soome }
21545ffb0c9bSToomas Soome
21554b22b933Srs *RecordRef = NULL;
21564b22b933Srs
21575ffb0c9bSToomas Soome len = sizeof(DNSServiceFlags);
21584b22b933Srs len += 2 * sizeof(uint32_t); // interfaceIndex, ttl
21594b22b933Srs len += 3 * sizeof(uint16_t); // rrtype, rrclass, rdlen
21604b22b933Srs len += strlen(fullname) + 1;
21614b22b933Srs len += rdlen;
21624b22b933Srs
21635ffb0c9bSToomas Soome // Bump up the uid. Normally for shared operations (kDNSServiceFlagsShareConnection), this
21645ffb0c9bSToomas Soome // is done in ConnectToServer. For DNSServiceRegisterRecord, ConnectToServer has already
21655ffb0c9bSToomas Soome // been called. As multiple DNSServiceRegisterRecords can be multiplexed over a single
21665ffb0c9bSToomas Soome // connection, we need a way to demultiplex the response so that the callback corresponding
21675ffb0c9bSToomas Soome // to the right DNSServiceRegisterRecord instance can be called. Use the same mechanism that
21685ffb0c9bSToomas Soome // is used by kDNSServiceFlagsShareConnection. create_hdr copies the uid value to ipc
21695ffb0c9bSToomas Soome // hdr->client_context which will be returned in the ipc response.
21705ffb0c9bSToomas Soome if (++sdRef->uid.u32[0] == 0)
21715ffb0c9bSToomas Soome ++sdRef->uid.u32[1];
21725ffb0c9bSToomas Soome hdr = create_hdr(reg_record_request, &len, &ptr, 1, sdRef);
21735ffb0c9bSToomas Soome if (!hdr) return kDNSServiceErr_NoMemory;
21745ffb0c9bSToomas Soome
21754b22b933Srs put_flags(flags, &ptr);
21765ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
21774b22b933Srs put_string(fullname, &ptr);
21785ffb0c9bSToomas Soome put_uint16(rrtype, &ptr);
21795ffb0c9bSToomas Soome put_uint16(rrclass, &ptr);
21805ffb0c9bSToomas Soome put_uint16(rdlen, &ptr);
21814b22b933Srs put_rdata(rdlen, rdata, &ptr);
21825ffb0c9bSToomas Soome put_uint32(ttl, &ptr);
21834b22b933Srs
21845ffb0c9bSToomas Soome rref = malloc(sizeof(DNSRecord));
21855ffb0c9bSToomas Soome if (!rref) { free(hdr); return kDNSServiceErr_NoMemory; }
21865ffb0c9bSToomas Soome rref->AppContext = context;
21875ffb0c9bSToomas Soome rref->AppCallback = callBack;
21884b22b933Srs rref->record_index = sdRef->max_index++;
21894b22b933Srs rref->sdr = sdRef;
21905ffb0c9bSToomas Soome rref->recnext = NULL;
21914b22b933Srs *RecordRef = rref;
21925ffb0c9bSToomas Soome // Remember the uid that we are sending across so that we can match
21935ffb0c9bSToomas Soome // when the response comes back.
21945ffb0c9bSToomas Soome rref->uid = sdRef->uid;
21954b22b933Srs hdr->reg_index = rref->record_index;
21964b22b933Srs
21975ffb0c9bSToomas Soome p = &(sdRef)->rec;
21985ffb0c9bSToomas Soome while (*p) p = &(*p)->recnext;
21995ffb0c9bSToomas Soome *p = rref;
22004b22b933Srs
2201*472cd20dSToomas Soome err = deliver_request(hdr, sdRef); // Will free hdr for us
2202*472cd20dSToomas Soome #if CHECK_BUNDLE_VERSION
2203*472cd20dSToomas Soome if (err == kDNSServiceErr_NoAuth && !_should_return_noauth_error())
2204*472cd20dSToomas Soome {
2205*472cd20dSToomas Soome err = kDNSServiceErr_NoError;
2206*472cd20dSToomas Soome }
2207*472cd20dSToomas Soome #endif
2208*472cd20dSToomas Soome return err;
22095ffb0c9bSToomas Soome }
22104b22b933Srs
22115ffb0c9bSToomas Soome // sdRef returned by DNSServiceRegister()
DNSServiceAddRecord(DNSServiceRef sdRef,DNSRecordRef * RecordRef,DNSServiceFlags flags,uint16_t rrtype,uint16_t rdlen,const void * rdata,uint32_t ttl)22124b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceAddRecord
22135ffb0c9bSToomas Soome (
22145ffb0c9bSToomas Soome DNSServiceRef sdRef,
22154b22b933Srs DNSRecordRef *RecordRef,
22165ffb0c9bSToomas Soome DNSServiceFlags flags,
22175ffb0c9bSToomas Soome uint16_t rrtype,
22185ffb0c9bSToomas Soome uint16_t rdlen,
22194b22b933Srs const void *rdata,
22205ffb0c9bSToomas Soome uint32_t ttl
22215ffb0c9bSToomas Soome )
22225ffb0c9bSToomas Soome {
22234b22b933Srs ipc_msg_hdr *hdr;
22244b22b933Srs size_t len = 0;
22254b22b933Srs char *ptr;
22264b22b933Srs DNSRecordRef rref;
22275ffb0c9bSToomas Soome DNSRecord **p;
22285ffb0c9bSToomas Soome
2229c65ebfc7SToomas Soome if (!sdRef || !RecordRef || (!rdata && rdlen))
2230c65ebfc7SToomas Soome {
2231c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceAddRecord called with NULL parameter");
2232c65ebfc7SToomas Soome return kDNSServiceErr_BadParam;
2233c65ebfc7SToomas Soome }
22345ffb0c9bSToomas Soome if (sdRef->op != reg_service_request)
22355ffb0c9bSToomas Soome {
22365ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceAddRecord called with non-DNSServiceRegister DNSServiceRef %p %d", sdRef, sdRef->op);
22375ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
22385ffb0c9bSToomas Soome }
22394b22b933Srs
22405ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
22415ffb0c9bSToomas Soome {
22425ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceAddRecord called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
22434b22b933Srs return kDNSServiceErr_BadReference;
22445ffb0c9bSToomas Soome }
22455ffb0c9bSToomas Soome
22464b22b933Srs *RecordRef = NULL;
22474b22b933Srs
22485ffb0c9bSToomas Soome len += 2 * sizeof(uint16_t); // rrtype, rdlen
22494b22b933Srs len += rdlen;
22504b22b933Srs len += sizeof(uint32_t);
22514b22b933Srs len += sizeof(DNSServiceFlags);
22524b22b933Srs
22535ffb0c9bSToomas Soome hdr = create_hdr(add_record_request, &len, &ptr, 1, sdRef);
22545ffb0c9bSToomas Soome if (!hdr) return kDNSServiceErr_NoMemory;
22554b22b933Srs put_flags(flags, &ptr);
22565ffb0c9bSToomas Soome put_uint16(rrtype, &ptr);
22575ffb0c9bSToomas Soome put_uint16(rdlen, &ptr);
22584b22b933Srs put_rdata(rdlen, rdata, &ptr);
22595ffb0c9bSToomas Soome put_uint32(ttl, &ptr);
22604b22b933Srs
22615ffb0c9bSToomas Soome rref = malloc(sizeof(DNSRecord));
22625ffb0c9bSToomas Soome if (!rref) { free(hdr); return kDNSServiceErr_NoMemory; }
22635ffb0c9bSToomas Soome rref->AppContext = NULL;
22645ffb0c9bSToomas Soome rref->AppCallback = NULL;
22654b22b933Srs rref->record_index = sdRef->max_index++;
22664b22b933Srs rref->sdr = sdRef;
22675ffb0c9bSToomas Soome rref->recnext = NULL;
22684b22b933Srs *RecordRef = rref;
22694b22b933Srs hdr->reg_index = rref->record_index;
22704b22b933Srs
22715ffb0c9bSToomas Soome p = &(sdRef)->rec;
22725ffb0c9bSToomas Soome while (*p) p = &(*p)->recnext;
22735ffb0c9bSToomas Soome *p = rref;
22745ffb0c9bSToomas Soome
22755ffb0c9bSToomas Soome return deliver_request(hdr, sdRef); // Will free hdr for us
22764b22b933Srs }
22774b22b933Srs
22785ffb0c9bSToomas Soome // DNSRecordRef returned by DNSServiceRegisterRecord or DNSServiceAddRecord
DNSServiceUpdateRecord(DNSServiceRef sdRef,DNSRecordRef RecordRef,DNSServiceFlags flags,uint16_t rdlen,const void * rdata,uint32_t ttl)22794b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceUpdateRecord
22805ffb0c9bSToomas Soome (
22815ffb0c9bSToomas Soome DNSServiceRef sdRef,
22825ffb0c9bSToomas Soome DNSRecordRef RecordRef,
22835ffb0c9bSToomas Soome DNSServiceFlags flags,
22845ffb0c9bSToomas Soome uint16_t rdlen,
22854b22b933Srs const void *rdata,
22865ffb0c9bSToomas Soome uint32_t ttl
22875ffb0c9bSToomas Soome )
22885ffb0c9bSToomas Soome {
22894b22b933Srs ipc_msg_hdr *hdr;
22904b22b933Srs size_t len = 0;
22914b22b933Srs char *ptr;
22924b22b933Srs
2293c65ebfc7SToomas Soome if (!sdRef || (!rdata && rdlen))
2294c65ebfc7SToomas Soome {
2295c65ebfc7SToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceUpdateRecord called with NULL parameter");
2296c65ebfc7SToomas Soome return kDNSServiceErr_BadParam;
2297c65ebfc7SToomas Soome }
22985ffb0c9bSToomas Soome
22995ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
23005ffb0c9bSToomas Soome {
23015ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceUpdateRecord called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
23025ffb0c9bSToomas Soome return kDNSServiceErr_BadReference;
23035ffb0c9bSToomas Soome }
23045ffb0c9bSToomas Soome
23055ffb0c9bSToomas Soome // Note: RecordRef is allowed to be NULL
23064b22b933Srs
23074b22b933Srs len += sizeof(uint16_t);
23084b22b933Srs len += rdlen;
23094b22b933Srs len += sizeof(uint32_t);
23104b22b933Srs len += sizeof(DNSServiceFlags);
23114b22b933Srs
23125ffb0c9bSToomas Soome hdr = create_hdr(update_record_request, &len, &ptr, 1, sdRef);
23135ffb0c9bSToomas Soome if (!hdr) return kDNSServiceErr_NoMemory;
23144b22b933Srs hdr->reg_index = RecordRef ? RecordRef->record_index : TXT_RECORD_INDEX;
23154b22b933Srs put_flags(flags, &ptr);
23165ffb0c9bSToomas Soome put_uint16(rdlen, &ptr);
23174b22b933Srs put_rdata(rdlen, rdata, &ptr);
23185ffb0c9bSToomas Soome put_uint32(ttl, &ptr);
23195ffb0c9bSToomas Soome return deliver_request(hdr, sdRef); // Will free hdr for us
23205ffb0c9bSToomas Soome }
23214b22b933Srs
DNSServiceRemoveRecord(DNSServiceRef sdRef,DNSRecordRef RecordRef,DNSServiceFlags flags)23224b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceRemoveRecord
23235ffb0c9bSToomas Soome (
23245ffb0c9bSToomas Soome DNSServiceRef sdRef,
23255ffb0c9bSToomas Soome DNSRecordRef RecordRef,
23265ffb0c9bSToomas Soome DNSServiceFlags flags
23275ffb0c9bSToomas Soome )
23285ffb0c9bSToomas Soome {
23294b22b933Srs ipc_msg_hdr *hdr;
23304b22b933Srs size_t len = 0;
23314b22b933Srs char *ptr;
23324b22b933Srs DNSServiceErrorType err;
23334b22b933Srs
23345ffb0c9bSToomas Soome if (!sdRef) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRemoveRecord called with NULL DNSServiceRef"); return kDNSServiceErr_BadParam; }
23355ffb0c9bSToomas Soome if (!RecordRef) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRemoveRecord called with NULL DNSRecordRef"); return kDNSServiceErr_BadParam; }
23365ffb0c9bSToomas Soome if (!sdRef->max_index) { syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRemoveRecord called with bad DNSServiceRef"); return kDNSServiceErr_BadReference; }
23375ffb0c9bSToomas Soome
23385ffb0c9bSToomas Soome if (!DNSServiceRefValid(sdRef))
23395ffb0c9bSToomas Soome {
23405ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceRemoveRecord called with invalid DNSServiceRef %p %08X %08X", sdRef, sdRef->sockfd, sdRef->validator);
23414b22b933Srs return kDNSServiceErr_BadReference;
23425ffb0c9bSToomas Soome }
23434b22b933Srs
23444b22b933Srs len += sizeof(flags);
23455ffb0c9bSToomas Soome hdr = create_hdr(remove_record_request, &len, &ptr, 1, sdRef);
23465ffb0c9bSToomas Soome if (!hdr) return kDNSServiceErr_NoMemory;
23474b22b933Srs hdr->reg_index = RecordRef->record_index;
23484b22b933Srs put_flags(flags, &ptr);
23495ffb0c9bSToomas Soome err = deliver_request(hdr, sdRef); // Will free hdr for us
23505ffb0c9bSToomas Soome if (!err)
23515ffb0c9bSToomas Soome {
23525ffb0c9bSToomas Soome // This RecordRef could have been allocated in DNSServiceRegisterRecord or DNSServiceAddRecord.
23535ffb0c9bSToomas Soome // If so, delink from the list before freeing
23545ffb0c9bSToomas Soome DNSRecord **p = &sdRef->rec;
23555ffb0c9bSToomas Soome while (*p && *p != RecordRef) p = &(*p)->recnext;
23565ffb0c9bSToomas Soome if (*p) *p = RecordRef->recnext;
23575ffb0c9bSToomas Soome free(RecordRef);
23584b22b933Srs }
23595ffb0c9bSToomas Soome return err;
23605ffb0c9bSToomas Soome }
23614b22b933Srs
DNSServiceReconfirmRecord(DNSServiceFlags flags,uint32_t interfaceIndex,const char * fullname,uint16_t rrtype,uint16_t rrclass,uint16_t rdlen,const void * rdata)23624b22b933Srs DNSServiceErrorType DNSSD_API DNSServiceReconfirmRecord
23635ffb0c9bSToomas Soome (
23645ffb0c9bSToomas Soome DNSServiceFlags flags,
23655ffb0c9bSToomas Soome uint32_t interfaceIndex,
23665ffb0c9bSToomas Soome const char *fullname,
23675ffb0c9bSToomas Soome uint16_t rrtype,
23685ffb0c9bSToomas Soome uint16_t rrclass,
23695ffb0c9bSToomas Soome uint16_t rdlen,
23705ffb0c9bSToomas Soome const void *rdata
23715ffb0c9bSToomas Soome )
23725ffb0c9bSToomas Soome {
2373c65ebfc7SToomas Soome DNSServiceErrorType err;
23744b22b933Srs char *ptr;
23754b22b933Srs size_t len;
23764b22b933Srs ipc_msg_hdr *hdr;
2377c65ebfc7SToomas Soome DNSServiceOp *tmp = NULL;
2378c65ebfc7SToomas Soome
2379c65ebfc7SToomas Soome if (!fullname || (!rdata && rdlen)) return kDNSServiceErr_BadParam;
23805ffb0c9bSToomas Soome
2381c65ebfc7SToomas Soome err = ConnectToServer(&tmp, flags, reconfirm_record_request, NULL, NULL, NULL);
23825ffb0c9bSToomas Soome if (err) return err;
23834b22b933Srs
23844b22b933Srs len = sizeof(DNSServiceFlags);
23854b22b933Srs len += sizeof(uint32_t);
23864b22b933Srs len += strlen(fullname) + 1;
23874b22b933Srs len += 3 * sizeof(uint16_t);
23884b22b933Srs len += rdlen;
23895ffb0c9bSToomas Soome hdr = create_hdr(reconfirm_record_request, &len, &ptr, 0, tmp);
23905ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(tmp); return kDNSServiceErr_NoMemory; }
23914b22b933Srs
23924b22b933Srs put_flags(flags, &ptr);
23935ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
23944b22b933Srs put_string(fullname, &ptr);
23955ffb0c9bSToomas Soome put_uint16(rrtype, &ptr);
23965ffb0c9bSToomas Soome put_uint16(rrclass, &ptr);
23975ffb0c9bSToomas Soome put_uint16(rdlen, &ptr);
23984b22b933Srs put_rdata(rdlen, rdata, &ptr);
23995ffb0c9bSToomas Soome
24005ffb0c9bSToomas Soome err = deliver_request(hdr, tmp); // Will free hdr for us
24014b22b933Srs DNSServiceRefDeallocate(tmp);
24025ffb0c9bSToomas Soome return err;
24035ffb0c9bSToomas Soome }
24045ffb0c9bSToomas Soome
24055ffb0c9bSToomas Soome
handle_port_mapping_response(DNSServiceOp * const sdr,const CallbackHeader * const cbh,const char * data,const char * const end)24065ffb0c9bSToomas Soome static void handle_port_mapping_response(DNSServiceOp *const sdr, const CallbackHeader *const cbh, const char *data, const char *const end)
24075ffb0c9bSToomas Soome {
24085ffb0c9bSToomas Soome union { uint32_t l; u_char b[4]; } addr;
24095ffb0c9bSToomas Soome uint8_t protocol;
24105ffb0c9bSToomas Soome union { uint16_t s; u_char b[2]; } internalPort;
24115ffb0c9bSToomas Soome union { uint16_t s; u_char b[2]; } externalPort;
24125ffb0c9bSToomas Soome uint32_t ttl;
24135ffb0c9bSToomas Soome
24145ffb0c9bSToomas Soome if (!data || data + 13 > end) goto fail;
24155ffb0c9bSToomas Soome
24165ffb0c9bSToomas Soome addr.b[0] = *data++;
24175ffb0c9bSToomas Soome addr.b[1] = *data++;
24185ffb0c9bSToomas Soome addr.b[2] = *data++;
24195ffb0c9bSToomas Soome addr.b[3] = *data++;
24205ffb0c9bSToomas Soome protocol = *data++;
24215ffb0c9bSToomas Soome internalPort.b[0] = *data++;
24225ffb0c9bSToomas Soome internalPort.b[1] = *data++;
24235ffb0c9bSToomas Soome externalPort.b[0] = *data++;
24245ffb0c9bSToomas Soome externalPort.b[1] = *data++;
24255ffb0c9bSToomas Soome ttl = get_uint32(&data, end);
24265ffb0c9bSToomas Soome if (!data) goto fail;
24275ffb0c9bSToomas Soome
24285ffb0c9bSToomas Soome ((DNSServiceNATPortMappingReply)sdr->AppCallback)(sdr, cbh->cb_flags, cbh->cb_interface, cbh->cb_err, addr.l, protocol, internalPort.s, externalPort.s, ttl, sdr->AppContext);
24295ffb0c9bSToomas Soome return;
24305ffb0c9bSToomas Soome // MUST NOT touch sdr after invoking AppCallback -- client is allowed to dispose it from within callback function
24315ffb0c9bSToomas Soome
24325ffb0c9bSToomas Soome fail :
24335ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub handle_port_mapping_response: error reading result from daemon");
24345ffb0c9bSToomas Soome }
24355ffb0c9bSToomas Soome
DNSServiceNATPortMappingCreate(DNSServiceRef * sdRef,DNSServiceFlags flags,uint32_t interfaceIndex,uint32_t protocol,uint16_t internalPortInNetworkByteOrder,uint16_t externalPortInNetworkByteOrder,uint32_t ttl,DNSServiceNATPortMappingReply callBack,void * context)24365ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceNATPortMappingCreate
24375ffb0c9bSToomas Soome (
24385ffb0c9bSToomas Soome DNSServiceRef *sdRef,
24395ffb0c9bSToomas Soome DNSServiceFlags flags,
24405ffb0c9bSToomas Soome uint32_t interfaceIndex,
24415ffb0c9bSToomas Soome uint32_t protocol, /* TCP and/or UDP */
24425ffb0c9bSToomas Soome uint16_t internalPortInNetworkByteOrder,
24435ffb0c9bSToomas Soome uint16_t externalPortInNetworkByteOrder,
24445ffb0c9bSToomas Soome uint32_t ttl, /* time to live in seconds */
24455ffb0c9bSToomas Soome DNSServiceNATPortMappingReply callBack,
24465ffb0c9bSToomas Soome void *context /* may be NULL */
24475ffb0c9bSToomas Soome )
24485ffb0c9bSToomas Soome {
24495ffb0c9bSToomas Soome char *ptr;
24505ffb0c9bSToomas Soome size_t len;
24515ffb0c9bSToomas Soome ipc_msg_hdr *hdr;
24525ffb0c9bSToomas Soome union { uint16_t s; u_char b[2]; } internalPort = { internalPortInNetworkByteOrder };
24535ffb0c9bSToomas Soome union { uint16_t s; u_char b[2]; } externalPort = { externalPortInNetworkByteOrder };
24545ffb0c9bSToomas Soome
24553b436d06SToomas Soome DNSServiceErrorType err = ConnectToServer(sdRef, flags, port_mapping_request, handle_port_mapping_response, (void *)callBack, context);
24565ffb0c9bSToomas Soome if (err) return err; // On error ConnectToServer leaves *sdRef set to NULL
24575ffb0c9bSToomas Soome
24585ffb0c9bSToomas Soome len = sizeof(flags);
24595ffb0c9bSToomas Soome len += sizeof(interfaceIndex);
24605ffb0c9bSToomas Soome len += sizeof(protocol);
24615ffb0c9bSToomas Soome len += sizeof(internalPort);
24625ffb0c9bSToomas Soome len += sizeof(externalPort);
24635ffb0c9bSToomas Soome len += sizeof(ttl);
24645ffb0c9bSToomas Soome
24655ffb0c9bSToomas Soome hdr = create_hdr(port_mapping_request, &len, &ptr, (*sdRef)->primary ? 1 : 0, *sdRef);
24665ffb0c9bSToomas Soome if (!hdr) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; return kDNSServiceErr_NoMemory; }
24675ffb0c9bSToomas Soome
24685ffb0c9bSToomas Soome put_flags(flags, &ptr);
24695ffb0c9bSToomas Soome put_uint32(interfaceIndex, &ptr);
24705ffb0c9bSToomas Soome put_uint32(protocol, &ptr);
24715ffb0c9bSToomas Soome *ptr++ = internalPort.b[0];
24725ffb0c9bSToomas Soome *ptr++ = internalPort.b[1];
24735ffb0c9bSToomas Soome *ptr++ = externalPort.b[0];
24745ffb0c9bSToomas Soome *ptr++ = externalPort.b[1];
24755ffb0c9bSToomas Soome put_uint32(ttl, &ptr);
24765ffb0c9bSToomas Soome
24775ffb0c9bSToomas Soome err = deliver_request(hdr, *sdRef); // Will free hdr for us
24785ffb0c9bSToomas Soome if (err) { DNSServiceRefDeallocate(*sdRef); *sdRef = NULL; }
24795ffb0c9bSToomas Soome return err;
24805ffb0c9bSToomas Soome }
24815ffb0c9bSToomas Soome
24825ffb0c9bSToomas Soome #if _DNS_SD_LIBDISPATCH
DNSServiceSetDispatchQueue(DNSServiceRef service,dispatch_queue_t queue)24835ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceSetDispatchQueue
24845ffb0c9bSToomas Soome (
24855ffb0c9bSToomas Soome DNSServiceRef service,
24865ffb0c9bSToomas Soome dispatch_queue_t queue
24875ffb0c9bSToomas Soome )
24885ffb0c9bSToomas Soome {
24895ffb0c9bSToomas Soome int dnssd_fd = DNSServiceRefSockFD(service);
24905ffb0c9bSToomas Soome if (dnssd_fd == dnssd_InvalidSocket) return kDNSServiceErr_BadParam;
24915ffb0c9bSToomas Soome if (!queue)
24925ffb0c9bSToomas Soome {
24935ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub: DNSServiceSetDispatchQueue dispatch queue NULL");
24945ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
24955ffb0c9bSToomas Soome }
24965ffb0c9bSToomas Soome if (service->disp_queue)
24975ffb0c9bSToomas Soome {
24985ffb0c9bSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSetDispatchQueue dispatch queue set already");
24995ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
25005ffb0c9bSToomas Soome }
25015ffb0c9bSToomas Soome if (service->disp_source)
25025ffb0c9bSToomas Soome {
2503*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSetDispatchQueue dispatch source set already");
25045ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
25055ffb0c9bSToomas Soome }
25065ffb0c9bSToomas Soome service->disp_source = dispatch_source_create(DISPATCH_SOURCE_TYPE_READ, dnssd_fd, 0, queue);
25075ffb0c9bSToomas Soome if (!service->disp_source)
25085ffb0c9bSToomas Soome {
2509*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSetDispatchQueue dispatch_source_create failed");
25105ffb0c9bSToomas Soome return kDNSServiceErr_NoMemory;
25115ffb0c9bSToomas Soome }
25125ffb0c9bSToomas Soome service->disp_queue = queue;
25135ffb0c9bSToomas Soome dispatch_source_set_event_handler(service->disp_source, ^{DNSServiceProcessResult(service);});
25145ffb0c9bSToomas Soome dispatch_source_set_cancel_handler(service->disp_source, ^{dnssd_close(dnssd_fd);});
25155ffb0c9bSToomas Soome dispatch_resume(service->disp_source);
25165ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
25175ffb0c9bSToomas Soome }
25185ffb0c9bSToomas Soome #endif // _DNS_SD_LIBDISPATCH
25195ffb0c9bSToomas Soome
25205ffb0c9bSToomas Soome #if !defined(_WIN32)
25215ffb0c9bSToomas Soome
SleepKeepaliveCallback(DNSServiceRef sdRef,DNSRecordRef rec,const DNSServiceFlags flags,DNSServiceErrorType errorCode,void * context)25225ffb0c9bSToomas Soome static void DNSSD_API SleepKeepaliveCallback(DNSServiceRef sdRef, DNSRecordRef rec, const DNSServiceFlags flags,
25235ffb0c9bSToomas Soome DNSServiceErrorType errorCode, void *context)
25245ffb0c9bSToomas Soome {
25255ffb0c9bSToomas Soome SleepKAContext *ka = (SleepKAContext *)context;
25265ffb0c9bSToomas Soome (void)rec; // Unused
25275ffb0c9bSToomas Soome (void)flags; // Unused
25285ffb0c9bSToomas Soome
25295ffb0c9bSToomas Soome if (sdRef->kacontext != context)
2530*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub SleepKeepaliveCallback context mismatch");
25315ffb0c9bSToomas Soome
25325ffb0c9bSToomas Soome if (ka->AppCallback)
25335ffb0c9bSToomas Soome ((DNSServiceSleepKeepaliveReply)ka->AppCallback)(sdRef, errorCode, ka->AppContext);
25345ffb0c9bSToomas Soome }
25355ffb0c9bSToomas Soome
2536*472cd20dSToomas Soome static DNSServiceErrorType _DNSServiceSleepKeepalive_sockaddr
2537*472cd20dSToomas Soome (
2538*472cd20dSToomas Soome DNSServiceRef * sdRef,
2539*472cd20dSToomas Soome DNSServiceFlags flags,
2540*472cd20dSToomas Soome const struct sockaddr * localAddr,
2541*472cd20dSToomas Soome const struct sockaddr * remoteAddr,
2542*472cd20dSToomas Soome unsigned int timeout,
2543*472cd20dSToomas Soome DNSServiceSleepKeepaliveReply callBack,
2544*472cd20dSToomas Soome void * context
2545*472cd20dSToomas Soome );
2546*472cd20dSToomas Soome
DNSServiceSleepKeepalive(DNSServiceRef * sdRef,DNSServiceFlags flags,int fd,unsigned int timeout,DNSServiceSleepKeepaliveReply callBack,void * context)25475ffb0c9bSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceSleepKeepalive
25485ffb0c9bSToomas Soome (
25495ffb0c9bSToomas Soome DNSServiceRef *sdRef,
25505ffb0c9bSToomas Soome DNSServiceFlags flags,
25515ffb0c9bSToomas Soome int fd,
25525ffb0c9bSToomas Soome unsigned int timeout,
25535ffb0c9bSToomas Soome DNSServiceSleepKeepaliveReply callBack,
25545ffb0c9bSToomas Soome void *context
25555ffb0c9bSToomas Soome )
25565ffb0c9bSToomas Soome {
25575ffb0c9bSToomas Soome struct sockaddr_storage lss;
25585ffb0c9bSToomas Soome struct sockaddr_storage rss;
25595ffb0c9bSToomas Soome socklen_t len1, len2;
25605ffb0c9bSToomas Soome
25615ffb0c9bSToomas Soome len1 = sizeof(lss);
25625ffb0c9bSToomas Soome if (getsockname(fd, (struct sockaddr *)&lss, &len1) < 0)
25635ffb0c9bSToomas Soome {
2564*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive: getsockname %d\n", errno);
25655ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
25665ffb0c9bSToomas Soome }
25675ffb0c9bSToomas Soome
25685ffb0c9bSToomas Soome len2 = sizeof(rss);
25695ffb0c9bSToomas Soome if (getpeername(fd, (struct sockaddr *)&rss, &len2) < 0)
25705ffb0c9bSToomas Soome {
2571*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive: getpeername %d\n", errno);
25725ffb0c9bSToomas Soome return kDNSServiceErr_BadParam;
25735ffb0c9bSToomas Soome }
25745ffb0c9bSToomas Soome
25755ffb0c9bSToomas Soome if (len1 != len2)
25765ffb0c9bSToomas Soome {
2577*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive local/remote info not same");
25785ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
25795ffb0c9bSToomas Soome }
2580*472cd20dSToomas Soome return _DNSServiceSleepKeepalive_sockaddr(sdRef, flags, (const struct sockaddr *)&lss, (const struct sockaddr *)&rss,
2581*472cd20dSToomas Soome timeout, callBack, context);
2582*472cd20dSToomas Soome }
2583*472cd20dSToomas Soome
DNSServiceSleepKeepalive_sockaddr(DNSServiceRef * sdRef,DNSServiceFlags flags,const struct sockaddr * localAddr,const struct sockaddr * remoteAddr,unsigned int timeout,DNSServiceSleepKeepaliveReply callBack,void * context)2584*472cd20dSToomas Soome DNSServiceErrorType DNSSD_API DNSServiceSleepKeepalive_sockaddr
2585*472cd20dSToomas Soome (
2586*472cd20dSToomas Soome DNSServiceRef * sdRef,
2587*472cd20dSToomas Soome DNSServiceFlags flags,
2588*472cd20dSToomas Soome const struct sockaddr * localAddr,
2589*472cd20dSToomas Soome const struct sockaddr * remoteAddr,
2590*472cd20dSToomas Soome unsigned int timeout,
2591*472cd20dSToomas Soome DNSServiceSleepKeepaliveReply callBack,
2592*472cd20dSToomas Soome void * context
2593*472cd20dSToomas Soome )
2594*472cd20dSToomas Soome {
2595*472cd20dSToomas Soome return _DNSServiceSleepKeepalive_sockaddr(sdRef, flags, localAddr, remoteAddr, timeout, callBack, context );
2596*472cd20dSToomas Soome }
2597*472cd20dSToomas Soome
_DNSServiceSleepKeepalive_sockaddr(DNSServiceRef * sdRef,DNSServiceFlags flags,const struct sockaddr * localAddr,const struct sockaddr * remoteAddr,unsigned int timeout,DNSServiceSleepKeepaliveReply callBack,void * context)2598*472cd20dSToomas Soome static DNSServiceErrorType _DNSServiceSleepKeepalive_sockaddr
2599*472cd20dSToomas Soome (
2600*472cd20dSToomas Soome DNSServiceRef * sdRef,
2601*472cd20dSToomas Soome DNSServiceFlags flags,
2602*472cd20dSToomas Soome const struct sockaddr * localAddr,
2603*472cd20dSToomas Soome const struct sockaddr * remoteAddr,
2604*472cd20dSToomas Soome unsigned int timeout,
2605*472cd20dSToomas Soome DNSServiceSleepKeepaliveReply callBack,
2606*472cd20dSToomas Soome void * context
2607*472cd20dSToomas Soome )
2608*472cd20dSToomas Soome {
2609*472cd20dSToomas Soome char source_str[INET6_ADDRSTRLEN];
2610*472cd20dSToomas Soome char target_str[INET6_ADDRSTRLEN];
2611*472cd20dSToomas Soome unsigned int len, proxyreclen;
2612*472cd20dSToomas Soome char buf[256];
2613*472cd20dSToomas Soome DNSServiceErrorType err;
2614*472cd20dSToomas Soome DNSRecordRef record = NULL;
2615*472cd20dSToomas Soome char name[10];
2616*472cd20dSToomas Soome char recname[128];
2617*472cd20dSToomas Soome SleepKAContext *ka;
2618*472cd20dSToomas Soome unsigned int i, unique;
2619*472cd20dSToomas Soome
2620*472cd20dSToomas Soome (void) flags; //unused
2621*472cd20dSToomas Soome if (!timeout) return kDNSServiceErr_BadParam;
26225ffb0c9bSToomas Soome
26235ffb0c9bSToomas Soome unique = 0;
2624*472cd20dSToomas Soome if ((localAddr->sa_family == AF_INET) && (remoteAddr->sa_family == AF_INET))
26255ffb0c9bSToomas Soome {
2626*472cd20dSToomas Soome const struct sockaddr_in *sl = (const struct sockaddr_in *)localAddr;
2627*472cd20dSToomas Soome const struct sockaddr_in *sr = (const struct sockaddr_in *)remoteAddr;
26285ffb0c9bSToomas Soome unsigned char *ptr = (unsigned char *)&sl->sin_addr;
26295ffb0c9bSToomas Soome
26305ffb0c9bSToomas Soome if (!inet_ntop(AF_INET, (const void *)&sr->sin_addr, target_str, sizeof (target_str)))
26315ffb0c9bSToomas Soome {
2632*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive remote info failed %d", errno);
26335ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26345ffb0c9bSToomas Soome }
26355ffb0c9bSToomas Soome if (!inet_ntop(AF_INET, (const void *)&sl->sin_addr, source_str, sizeof (source_str)))
26365ffb0c9bSToomas Soome {
2637*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive local info failed %d", errno);
26385ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26395ffb0c9bSToomas Soome }
26405ffb0c9bSToomas Soome // Sum of all bytes in the local address and port should result in a unique
26415ffb0c9bSToomas Soome // number in the local network
26425ffb0c9bSToomas Soome for (i = 0; i < sizeof(struct in_addr); i++)
26435ffb0c9bSToomas Soome unique += ptr[i];
26445ffb0c9bSToomas Soome unique += sl->sin_port;
26455ffb0c9bSToomas Soome len = snprintf(buf+1, sizeof(buf) - 1, "t=%u h=%s d=%s l=%u r=%u", timeout, source_str, target_str, ntohs(sl->sin_port), ntohs(sr->sin_port));
26465ffb0c9bSToomas Soome }
2647*472cd20dSToomas Soome else if ((localAddr->sa_family == AF_INET6) && (remoteAddr->sa_family == AF_INET6))
26485ffb0c9bSToomas Soome {
2649*472cd20dSToomas Soome const struct sockaddr_in6 *sl6 = (const struct sockaddr_in6 *)localAddr;
2650*472cd20dSToomas Soome const struct sockaddr_in6 *sr6 = (const struct sockaddr_in6 *)remoteAddr;
26515ffb0c9bSToomas Soome unsigned char *ptr = (unsigned char *)&sl6->sin6_addr;
26525ffb0c9bSToomas Soome
26535ffb0c9bSToomas Soome if (!inet_ntop(AF_INET6, (const void *)&sr6->sin6_addr, target_str, sizeof (target_str)))
26545ffb0c9bSToomas Soome {
2655*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive remote6 info failed %d", errno);
26565ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26575ffb0c9bSToomas Soome }
26585ffb0c9bSToomas Soome if (!inet_ntop(AF_INET6, (const void *)&sl6->sin6_addr, source_str, sizeof (source_str)))
26595ffb0c9bSToomas Soome {
2660*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive local6 info failed %d", errno);
26615ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26625ffb0c9bSToomas Soome }
26635ffb0c9bSToomas Soome for (i = 0; i < sizeof(struct in6_addr); i++)
26645ffb0c9bSToomas Soome unique += ptr[i];
26655ffb0c9bSToomas Soome unique += sl6->sin6_port;
26665ffb0c9bSToomas Soome len = snprintf(buf+1, sizeof(buf) - 1, "t=%u H=%s D=%s l=%u r=%u", timeout, source_str, target_str, ntohs(sl6->sin6_port), ntohs(sr6->sin6_port));
26675ffb0c9bSToomas Soome }
2668*472cd20dSToomas Soome else
2669*472cd20dSToomas Soome {
2670*472cd20dSToomas Soome return kDNSServiceErr_BadParam;
2671*472cd20dSToomas Soome }
26725ffb0c9bSToomas Soome
26735ffb0c9bSToomas Soome if (len >= (sizeof(buf) - 1))
26745ffb0c9bSToomas Soome {
2675*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive could not fit local/remote info");
26765ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26775ffb0c9bSToomas Soome }
26785ffb0c9bSToomas Soome // Include the NULL byte also in the first byte. The total length of the record includes the
26795ffb0c9bSToomas Soome // first byte also.
26805ffb0c9bSToomas Soome buf[0] = len + 1;
26815ffb0c9bSToomas Soome proxyreclen = len + 2;
26825ffb0c9bSToomas Soome
26835ffb0c9bSToomas Soome len = snprintf(name, sizeof(name), "%u", unique);
26845ffb0c9bSToomas Soome if (len >= sizeof(name))
26855ffb0c9bSToomas Soome {
2686*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive could not fit unique");
26875ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26885ffb0c9bSToomas Soome }
26895ffb0c9bSToomas Soome
26905ffb0c9bSToomas Soome len = snprintf(recname, sizeof(recname), "%s.%s", name, "_keepalive._dns-sd._udp.local");
26915ffb0c9bSToomas Soome if (len >= sizeof(recname))
26925ffb0c9bSToomas Soome {
2693*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive could not fit name");
26945ffb0c9bSToomas Soome return kDNSServiceErr_Unknown;
26955ffb0c9bSToomas Soome }
26965ffb0c9bSToomas Soome
26975ffb0c9bSToomas Soome ka = malloc(sizeof(SleepKAContext));
26985ffb0c9bSToomas Soome if (!ka) return kDNSServiceErr_NoMemory;
26993b436d06SToomas Soome ka->AppCallback = (void *)callBack;
27005ffb0c9bSToomas Soome ka->AppContext = context;
27015ffb0c9bSToomas Soome
27025ffb0c9bSToomas Soome err = DNSServiceCreateConnection(sdRef);
27035ffb0c9bSToomas Soome if (err)
27045ffb0c9bSToomas Soome {
2705*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive cannot create connection");
27065ffb0c9bSToomas Soome free(ka);
27075ffb0c9bSToomas Soome return err;
27084b22b933Srs }
27094b22b933Srs
27105ffb0c9bSToomas Soome // we don't care about the "record". When sdRef gets deallocated later, it will be freed too
27115ffb0c9bSToomas Soome err = DNSServiceRegisterRecord(*sdRef, &record, kDNSServiceFlagsUnique, 0, recname,
27125ffb0c9bSToomas Soome kDNSServiceType_NULL, kDNSServiceClass_IN, proxyreclen, buf, kDNSServiceInterfaceIndexAny, SleepKeepaliveCallback, ka);
27135ffb0c9bSToomas Soome if (err)
27145ffb0c9bSToomas Soome {
2715*472cd20dSToomas Soome syslog(LOG_WARNING, "dnssd_clientstub DNSServiceSleepKeepalive cannot create connection");
27165ffb0c9bSToomas Soome free(ka);
27175ffb0c9bSToomas Soome return err;
27185ffb0c9bSToomas Soome }
27195ffb0c9bSToomas Soome (*sdRef)->kacontext = ka;
27205ffb0c9bSToomas Soome return kDNSServiceErr_NoError;
27215ffb0c9bSToomas Soome }
27225ffb0c9bSToomas Soome #endif
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