1 /*
2 * Copyright 2017 Gary Mills
3 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Licensed under the Academic Free License version 2.1
6 */
7
8 #include <stdio.h>
9 #include <stdlib.h>
10 #include <unistd.h>
11 #include <signal.h>
12 #include <string.h>
13 #include <sys/types.h>
14 #include <sys/socket.h>
15 #include <sys/ioctl.h>
16 #include <sys/sockio.h>
17 #include <net/if.h>
18 #include <net/if_arp.h>
19 #include <netinet/in.h>
20 #include <arpa/inet.h>
21 #include <netdb.h>
22
23 #include <libhal.h>
24 #include <logger.h>
25
26 #include <glib.h>
27
28 #include "network-discovery.h"
29 #define NP(x) (x?x:"NULL")
30
31 extern int snmp_printer_info(char *hostname, char *community,
32 char **manufacturer, char **model, char **description,
33 char **serial_no, char ***command_set, char **uri);
34
35 void
network_device_name_to_udi(char * udi,size_t size,...)36 network_device_name_to_udi(char *udi, size_t size, ...)
37 {
38 va_list ap;
39 char *element;
40 int i;
41
42 udi[0] = '\0';
43 va_start(ap, size);
44 while ((element = va_arg(ap, char *)) != NULL) {
45 if (element[0] != '/')
46 strlcat(udi, "/", size);
47 strlcat(udi, element, size);
48 }
49 va_end(ap);
50
51 for (i = 0; udi[i] != '\0'; i++)
52 if (udi[i] == '.')
53 udi[i] = '_';
54 }
55
nop(int sig)56 static void nop(int sig) {}
57
58 static int
test_socket_access(struct in6_addr * addr,int port)59 test_socket_access(struct in6_addr *addr, int port)
60 {
61 int sd, rc;
62 struct sockaddr_in6 sin6;
63 void (*hndlr)(int);
64
65 memset(&sin6, 0, sizeof (sin6));
66 sin6.sin6_family = AF_INET6;
67 memcpy(&sin6.sin6_addr, addr, sizeof (*addr));
68 sin6.sin6_port = htons(port);
69
70 sd = socket(AF_INET6, SOCK_STREAM, 0);
71 hndlr = signal(SIGALRM, nop);
72 alarm(1);
73 rc = connect(sd, (struct sockaddr *)&sin6, sizeof (sin6));
74 alarm(0);
75 if (hndlr != NULL)
76 signal(SIGALRM, hndlr);
77 close(sd);
78
79 return ((rc < 0) ? 1 : 0);
80 }
81
82 int
is_listening(char * hostname,int port)83 is_listening(char *hostname, int port)
84 {
85 char *uri = NULL, addr_string[INET6_ADDRSTRLEN];
86 struct in6_addr ipv6addr[1];
87 int errnum;
88 struct hostent *hp;
89
90 hp = getipnodebyname(hostname, AF_INET6,
91 AI_ALL | AI_ADDRCONFIG | AI_V4MAPPED, &errnum);
92 if (hp != NULL) {
93 (void) memcpy(&ipv6addr, hp->h_addr_list[0], hp->h_length);
94 } else
95 return (-1);
96
97 return (test_socket_access(ipv6addr, port));
98 }
99
100 static char *
addr_to_string(char * prefix,uchar_t * mac,int mac_len,char * buf,int buf_len)101 addr_to_string(char *prefix, uchar_t *mac, int mac_len, char *buf, int buf_len)
102 {
103 int i, n = 0;
104
105 buf[0] = '\0';
106 if (prefix != NULL)
107 n = sprintf(buf, prefix);
108 for (i = 0; ((i < (mac_len)) && (n < buf_len)); i++)
109 n += sprintf(buf + n, "%2.2X", *mac++);
110
111 return (buf);
112 }
113
114 static char *
pseudo_serialno_from_addr(char * name)115 pseudo_serialno_from_addr(char *name)
116 {
117 int sd, errnum;
118 char buf[128];
119 struct hostent *hp;
120 struct xarpreq ar;
121
122 if (name == NULL)
123 return (NULL);
124
125 memset(&ar, 0, sizeof (ar));
126
127 hp = getipnodebyname(name, AF_INET6, AI_ADDRCONFIG, &errnum);
128 if (hp != NULL) {
129 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ar.xarp_pa;
130
131 sin6->sin6_family = AF_INET6;
132 (void) memcpy(&sin6->sin6_addr, hp->h_addr_list[0],
133 hp->h_length);
134 } else {
135 struct sockaddr_in *sin = (struct sockaddr_in *)&ar.xarp_pa;
136
137 sin->sin_family = AF_INET;
138 sin->sin_addr.s_addr = inet_addr(name);
139 }
140
141 sd = socket(AF_INET, SOCK_DGRAM, 0);
142
143 ar.xarp_ha.sdl_family = AF_LINK;
144 (void) ioctl(sd, SIOCGXARP, (caddr_t)&ar);
145
146 close(sd);
147
148 if (ar.xarp_flags & ATF_COM) { /* use the MAC address */
149 uchar_t *ea = (uchar_t *)LLADDR(&ar.xarp_ha);
150
151 addr_to_string("LLADDR-", ea, ar.xarp_ha.sdl_alen,
152 buf, sizeof (buf));
153
154 } else if (hp != NULL) { /* use the IPv6 address */
155 addr_to_string("IPV6ADDR-", (uchar_t *)&hp->h_addr_list[0],
156 hp->h_length, buf, sizeof (buf));
157 } else { /* use the IPv4 address */
158 struct sockaddr_in *sin = (struct sockaddr_in *)&ar.xarp_pa;
159
160 addr_to_string("IPV4ADDR-", (uchar_t *)&sin->sin_addr.s_addr, 4,
161 buf, sizeof (buf));
162 }
163
164 return (strdup(buf));
165 }
166
167 int
add_network_printer(LibHalContext * ctx,char * base,char * hostaddr,char * device,char * community)168 add_network_printer(LibHalContext *ctx, char *base, char *hostaddr,
169 char *device, char *community)
170 {
171 DBusError error;
172 int rc = -1;
173 char udi[128];
174 char *tmp_udi = NULL;
175 static char *parent = NULL;
176 char *manufacturer = NULL, *model = NULL, *description = NULL,
177 *uri = NULL, *sn, *serial;
178
179 sn = serial = pseudo_serialno_from_addr(hostaddr);
180
181 if (parent == NULL)
182 parent = getenv("UDI");
183
184 dbus_error_init(&error);
185
186 network_device_name_to_udi(udi, sizeof (udi), base, serial, NULL);
187
188 if (libhal_device_exists(ctx, udi, &error) == TRUE)
189 goto out;
190
191 if ((tmp_udi = libhal_new_device(ctx, &error)) == NULL)
192 goto out;
193
194 snmp_printer_info(hostaddr, community, &manufacturer, &model,
195 &description, &serial, NULL, &uri);
196
197 libhal_device_set_property_string(ctx, tmp_udi,
198 "info.parent", parent, &error);
199
200 libhal_device_set_property_string(ctx, tmp_udi,
201 "info.category", "printer", &error);
202
203 libhal_device_property_strlist_append(ctx, tmp_udi,
204 "info.capabilities", "printer", &error);
205 libhal_device_property_strlist_append(ctx, tmp_udi,
206 "info.capabilities", "network_device", &error);
207
208 libhal_device_set_property_string(ctx, tmp_udi,
209 "network_device.address", hostaddr, &error);
210
211 if ((community != NULL) && (strcasecmp(community, "public") != 0))
212 libhal_device_set_property_string(ctx, tmp_udi,
213 "network_device.snmp_community", community, &error);
214
215 if ((uri != NULL) || (device != NULL))
216 libhal_device_set_property_string(ctx, tmp_udi,
217 "printer.device", (uri ? uri : device), &error);
218
219 if (serial != NULL)
220 libhal_device_set_property_string(ctx, tmp_udi,
221 "printer.serial", serial, &error);
222
223 if (manufacturer != NULL)
224 libhal_device_set_property_string(ctx, tmp_udi,
225 "printer.vendor", manufacturer, &error);
226
227 if (model != NULL)
228 libhal_device_set_property_string(ctx, tmp_udi,
229 "printer.product", model, &error);
230
231 if (description != NULL)
232 libhal_device_set_property_string(ctx, tmp_udi,
233 "printer.description", description, &error);
234
235 /* commit the changes to the new UDI */
236 rc = libhal_device_commit_to_gdl(ctx, tmp_udi, udi, &error);
237
238 out:
239 HAL_DEBUG(("result: %s (%s): %s, %s, %s, %s, %s", hostaddr, udi,
240 NP(manufacturer), NP(model), NP(description), NP(serial),
241 NP(uri)));
242
243 if (tmp_udi != NULL)
244 free(tmp_udi);
245 if (manufacturer != NULL)
246 free(manufacturer);
247 if (model != NULL)
248 free(model);
249 if (description != NULL)
250 free(description);
251 if (uri != NULL)
252 free(uri);
253 if (sn != NULL)
254 free(sn);
255
256 if (dbus_error_is_set(&error)) {
257 HAL_WARNING(("%s: %s", error.name, error.message));
258 dbus_error_free(&error);
259 }
260
261 HAL_DEBUG(("add: %s (%s)", hostaddr, udi));
262
263 return (rc);
264 }
265
266 static int
number_of_interfaces(int s)267 number_of_interfaces(int s)
268 {
269 int rc = -1;
270 struct lifnum n;
271
272 memset(&n, 0 , sizeof (n));
273 n.lifn_family = AF_INET;
274 if (ioctl(s, SIOCGLIFNUM, (char *)&n) == 0)
275 rc = n.lifn_count;
276
277 return (rc);
278 }
279
280 static char *
broadcast_address(int s,char * ifname)281 broadcast_address(int s, char *ifname)
282 {
283 char *result = NULL;
284 struct lifreq r;
285
286 memset(&r, 0, sizeof (r));
287 strlcpy(r.lifr_name, ifname, sizeof (r.lifr_name));
288 if (ioctl(s, SIOCGLIFFLAGS, (caddr_t)&r) < 0) {
289 HAL_DEBUG(("broadcast_address: ioctl(SIOCGLIFFLAGS) failed."));
290 return (NULL);
291 }
292 if ((r.lifr_flags & (IFF_UP | IFF_LOOPBACK)) != IFF_UP) {
293 return (NULL);
294 }
295 if (ioctl(s, SIOCGLIFBRDADDR, (char *)&r) >= 0) {
296 char buf[INET_ADDRSTRLEN];
297 struct sockaddr_in *s =
298 (struct sockaddr_in *)&r.lifr_broadaddr;
299 result = (char *)inet_ntop(AF_INET,
300 &s->sin_addr, buf, sizeof (buf));
301 if (result != NULL)
302 result = strdup(result);
303 }
304
305 return (result);
306 }
307
308 GList *
broadcast_addresses()309 broadcast_addresses()
310 {
311 GList *result = NULL;
312 int s;
313 struct lifconf c;
314 int count;
315
316 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
317 return (NULL);
318
319 count = number_of_interfaces(s);
320
321 memset(&c, 0, sizeof (c));
322 c.lifc_family = AF_INET;
323 c.lifc_flags = 0;
324 c.lifc_buf = calloc(count, sizeof (struct lifreq));
325 c.lifc_len = (count * sizeof (struct lifreq));
326
327 if (ioctl(s, SIOCGLIFCONF, (char *)&c) == 0) {
328 struct lifreq *r = c.lifc_req;
329
330 for (count = c.lifc_len / sizeof (struct lifreq);
331 count > 0; count--, r++) {
332 char *address = broadcast_address(s, r->lifr_name);
333
334 if (address != NULL) /* add it to the list */
335 result = g_list_append(result, address);
336 }
337 }
338 free(c.lifc_buf);
339 close(s);
340
341 return (result);
342 }
343