1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27
28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
29 /* All Rights Reserved */
30
31 /*
32 * *************************************************************
33 * dial() returns an fd for an open tty-line connected to the
34 * specified remote. The caller should trap all ways to
35 * terminate, and call undial(). This will release the `lock'
36 * file and return the outgoing line to the system. This routine
37 * would prefer that the calling routine not use the `alarm()'
38 * system call, nor issue a `signal(SIGALRM, xxx)' call.
39 * If you must, then please save and restore the alarm times.
40 * The sleep() library routine is ok, though.
41 *
42 * #include <sys/types.h>
43 * #include <sys/stat.h>
44 * #include "dial.h"
45 *
46 * int dial(call);
47 * CALL call;
48 *
49 * void undial(rlfd);
50 * int rlfd;
51 *
52 * rlfd is the "remote-lne file descriptor" returned from dial.
53 *
54 * The CALL structure as (defined in dial.h):
55 *
56 * typedef struct {
57 * struct termio *attr; ptr to term attribute structure
58 * int baud; no longer used --
59 * left in for backwards compatibility
60 * int speed; 212A modem: low=300, high=1200
61 * negative for "Any" speed
62 * char *line; device name for out-going line
63 * char *telno; ptr to tel-no digit string
64 * int modem no longer used --
65 * left in for backwards compatibility
66 * char *device no longer used --
67 * left in for backwards compatibility
68 * int dev_len no longer used --
69 * left in for backwards compatibility
70 * } CALL;
71 *
72 * The error returns from dial are negative, in the range -1
73 * to -13, and their meanings are:
74 *
75 * INTRPT -1: interrupt occured
76 * D_HUNG -2: dialer hung (no return from write)
77 * NO_ANS -3: no answer (caller script failed)
78 * ILL_BD -4: illegal baud-rate
79 * A_PROB -5: acu problem (open() failure)
80 * L_PROB -6: line problem (open() failure)
81 * NO_Ldv -7: can't open Devices file
82 * DV_NT_A -8: specified device not available
83 * DV_NT_K -9: specified device not known
84 * NO_BD_A -10: no dev available at requested baud-rate
85 * NO_BD_K -11: no device known at requested baud-rate
86 * DV_NT_E -12: requested speed does not match
87 * BAD_SYS -13: system not in Systems file
88 *
89 * Setting attributes in the termio structure indicated in
90 * the `attr' field of the CALL structure before passing the
91 * structure to dial(), will cause those attributes to be set
92 * before the connection is made. This can be important for
93 * some attributes such as parity and baud.
94 *
95 * With an error return (negative value), there will not be
96 * any `lock-file' entry, so no need to call undial().
97 * *************************************************************
98 */
99
100 #include "mt.h"
101
102 #include <stdio.h>
103 #include <stdlib.h>
104 #include <string.h>
105 #include <sys/types.h>
106 #include <unistd.h>
107 #include <setjmp.h>
108 #include <sys/stat.h>
109 #include <sys/times.h>
110
111 #include "dial.h"
112
113 #include "uucp.h"
114 #include "uucpdefs.c"
115
116 #include "callers.c"
117 #include "conn.c"
118 #include "getargs.c"
119 #include "interface.c"
120 #include "line.c"
121 #include "stoa.c"
122 #include "strecpy.c"
123 #include "strsave.c"
124 #include "sysfiles.c"
125 #include "ulockf.c"
126
127 static int rlfd; /* fd for remote comm line */
128
129 static jmp_buf Sjbuf; /* needed by connection routines */
130
131 /* VARARGS */
132 /* ARGSUSED */
133 static void
assert(const char * s1,const char * s2,int i1,const char * s3,int i2)134 assert(const char *s1, const char *s2, int i1, const char *s3, int i2)
135 { /* for ASSERT in conn() */
136 }
137
138 /* ARGSUSED */
139 static void
logent(const char * s1,const char * s2)140 logent(const char *s1, const char *s2)
141 { /* so we can load unlockf() */
142 }
143
144 static void
cleanup(int Cn)145 cleanup(int Cn) /* this is executed only in the parent process */
146 {
147 (void) restline();
148 (void) setuid(Euid);
149 if (Cn > 0)
150 (void) close(Cn);
151
152 rmlock(NULL); /* uucp routine in ulockf.c */
153 }
154
155 int
dial(CALL call)156 dial(CALL call)
157 {
158 char *alt[7];
159 char speed[10]; /* character value of speed passed to dial */
160
161 /* set service so we know which Sysfiles entries to use, then */
162 /* be sure can access Devices file(s). use "cu" entries ... */
163 /* dial is more like cu than like uucico. */
164
165 (void) strcpy(Progname, "cu");
166 setservice(Progname);
167 if (sysaccess(EACCESS_DEVICES) != 0)
168 /* can't read Devices file(s) */
169 return (NO_Ldv);
170
171 if (call.attr != NULL) {
172 if (call.attr->c_cflag & PARENB) {
173 Evenflag = ((call.attr->c_cflag & PARODD) ? 0 : 1);
174 Oddflag = ((call.attr->c_cflag & PARODD) ? 1 : 0);
175 }
176 line_8bit = (call.attr->c_cflag & CS8 ? 1 : 0);
177 }
178
179 if (call.speed <= 0)
180 (void) strcpy(speed, "Any");
181 else
182 (void) sprintf(speed, "%d", call.speed);
183
184 /* Determine whether contents of "telno" is a system name. */
185 if ((call.telno != NULL) &&
186 (strlen(call.telno) != strspn(call.telno, "0123456789=-*#"))) {
187 /* use conn() for system names */
188 rlfd = conn(call.telno);
189 } else {
190 alt[F_NAME] = "dummy"; /* to replace the Systems file fields */
191 alt[F_TIME] = "Any"; /* needed for getto(); [F_TYPE] and */
192 alt[F_TYPE] = ""; /* [F_PHONE] assignment below */
193 alt[F_CLASS] = speed;
194 alt[F_PHONE] = "";
195 alt[F_LOGIN] = "";
196 alt[6] = "";
197
198 if ((call.telno != NULL) && (*call.telno != '\0')) {
199 /* given a phone number, use an ACU */
200 alt[F_PHONE] = call.telno;
201 alt[F_TYPE] = "ACU";
202 } else {
203 /* otherwise, use a Direct connection */
204 alt[F_TYPE] = "Direct";
205 /* If device name starts with "/dev/", strip it off */
206 /* since Devices file entries will also be stripped. */
207 if ((call.line != NULL) &&
208 (strncmp(call.line, "/dev/", 5) == 0))
209 Myline = (call.line + 5);
210 else
211 Myline = call.line;
212 }
213
214 #ifdef forfutureuse
215 if (call->class != NULL)
216 alt[F_TYPE] = call->class;
217 #endif
218
219
220 rlfd = getto(alt);
221 }
222 if (rlfd < 0)
223 switch (Uerror) {
224 case SS_NO_DEVICE:
225 return (NO_BD_A);
226 case SS_DIAL_FAILED:
227 return (D_HUNG);
228 case SS_LOCKED_DEVICE:
229 return (DV_NT_A);
230 case SS_BADSYSTEM:
231 return (BAD_SYS);
232 case SS_CANT_ACCESS_DEVICE:
233 return (L_PROB);
234 case SS_CHAT_FAILED:
235 return (NO_ANS);
236 default:
237 return (-Uerror);
238 }
239 (void) savline();
240 if ((call.attr) && ioctl(rlfd, TCSETA, call.attr) < 0) {
241 perror("stty for remote");
242 return (L_PROB);
243 }
244 Euid = geteuid();
245 if (setuid(getuid()) && setgid(getgid()) < 0)
246 undial(rlfd);
247 return (rlfd);
248 }
249
250 /*
251 * undial(fd)
252 */
253 void
undial(int fd)254 undial(int fd)
255 {
256 sethup(fd);
257 (void) sleep(2);
258 cleanup(fd);
259 }
260