defs.c revision 55065 
1/*-
2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/ppp/defs.c 55065 1999-12-23 21:43:12Z brian $
27 */
28
29
30#include <sys/types.h>
31#include <netdb.h>
32#include <netinet/in.h>
33#include <arpa/inet.h>
34#include <sys/socket.h>
35
36#include <ctype.h>
37#include <errno.h>
38#include <stdlib.h>
39#include <string.h>
40#include <termios.h>
41#if !defined(__FreeBSD__) || __FreeBSD__ < 3
42#include <time.h>
43#endif
44#include <unistd.h>
45
46#include "defs.h"
47
48#define	issep(c)	((c) == '\t' || (c) == ' ')
49
50void
51randinit()
52{
53#if __FreeBSD__ >= 3
54  static int initdone;		/* srandomdev() call is only required once */
55
56  if (!initdone) {
57    initdone = 1;
58    srandomdev();
59  }
60#else
61  srandom((time(NULL)^getpid())+random());
62#endif
63}
64
65ssize_t
66fullread(int fd, void *v, size_t n)
67{
68  size_t got, total;
69
70  for (total = 0; total < n; total += got)
71    switch ((got = read(fd, (char *)v + total, n - total))) {
72      case 0:
73        return total;
74      case -1:
75        if (errno == EINTR)
76          got = 0;
77        else
78          return -1;
79    }
80  return total;
81}
82
83static struct {
84  int mode;
85  const char *name;
86} modes[] = {
87  { PHYS_INTERACTIVE, "interactive" },
88  { PHYS_AUTO, "auto" },
89  { PHYS_DIRECT, "direct" },
90  { PHYS_DEDICATED, "dedicated" },
91  { PHYS_DDIAL, "ddial" },
92  { PHYS_BACKGROUND, "background" },
93  { PHYS_FOREGROUND, "foreground" },
94  { PHYS_ALL, "*" },
95  { 0, 0 }
96};
97
98const char *
99mode2Nam(int mode)
100{
101  int m;
102
103  for (m = 0; modes[m].mode; m++)
104    if (modes[m].mode == mode)
105      return modes[m].name;
106
107  return "unknown";
108}
109
110int
111Nam2mode(const char *name)
112{
113  int m, got, len;
114
115  len = strlen(name);
116  got = -1;
117  for (m = 0; modes[m].mode; m++)
118    if (!strncasecmp(name, modes[m].name, len)) {
119      if (modes[m].name[len] == '\0')
120	return modes[m].mode;
121      if (got != -1)
122        return 0;
123      got = m;
124    }
125
126  return got == -1 ? 0 : modes[got].mode;
127}
128
129struct in_addr
130GetIpAddr(const char *cp)
131{
132  struct in_addr ipaddr;
133
134  if (!strcasecmp(cp, "default"))
135    ipaddr.s_addr = INADDR_ANY;
136  else if (inet_aton(cp, &ipaddr) == 0) {
137    const char *ptr;
138
139    /* Any illegal characters ? */
140    for (ptr = cp; *ptr != '\0'; ptr++)
141      if (!isalnum(*ptr) && strchr("-.", *ptr) == NULL)
142        break;
143
144    if (*ptr == '\0') {
145      struct hostent *hp;
146
147      hp = gethostbyname(cp);
148      if (hp && hp->h_addrtype == AF_INET)
149        memcpy(&ipaddr, hp->h_addr, hp->h_length);
150      else
151        ipaddr.s_addr = INADDR_NONE;
152    } else
153      ipaddr.s_addr = INADDR_NONE;
154  }
155
156  return ipaddr;
157}
158
159static const struct speeds {
160  int nspeed;
161  speed_t speed;
162} speeds[] = {
163#ifdef B50
164  { 50, B50, },
165#endif
166#ifdef B75
167  { 75, B75, },
168#endif
169#ifdef B110
170  { 110, B110, },
171#endif
172#ifdef B134
173  { 134, B134, },
174#endif
175#ifdef B150
176  { 150, B150, },
177#endif
178#ifdef B200
179  { 200, B200, },
180#endif
181#ifdef B300
182  { 300, B300, },
183#endif
184#ifdef B600
185  { 600, B600, },
186#endif
187#ifdef B1200
188  { 1200, B1200, },
189#endif
190#ifdef B1800
191  { 1800, B1800, },
192#endif
193#ifdef B2400
194  { 2400, B2400, },
195#endif
196#ifdef B4800
197  { 4800, B4800, },
198#endif
199#ifdef B9600
200  { 9600, B9600, },
201#endif
202#ifdef B19200
203  { 19200, B19200, },
204#endif
205#ifdef B38400
206  { 38400, B38400, },
207#endif
208#ifndef _POSIX_SOURCE
209#ifdef B7200
210  { 7200, B7200, },
211#endif
212#ifdef B14400
213  { 14400, B14400, },
214#endif
215#ifdef B28800
216  { 28800, B28800, },
217#endif
218#ifdef B57600
219  { 57600, B57600, },
220#endif
221#ifdef B76800
222  { 76800, B76800, },
223#endif
224#ifdef B115200
225  { 115200, B115200, },
226#endif
227#ifdef B230400
228  { 230400, B230400, },
229#endif
230#ifdef EXTA
231  { 19200, EXTA, },
232#endif
233#ifdef EXTB
234  { 38400, EXTB, },
235#endif
236#endif				/* _POSIX_SOURCE */
237  { 0, 0 }
238};
239
240int
241SpeedToInt(speed_t speed)
242{
243  const struct speeds *sp;
244
245  for (sp = speeds; sp->nspeed; sp++) {
246    if (sp->speed == speed) {
247      return sp->nspeed;
248    }
249  }
250  return 0;
251}
252
253speed_t
254IntToSpeed(int nspeed)
255{
256  const struct speeds *sp;
257
258  for (sp = speeds; sp->nspeed; sp++) {
259    if (sp->nspeed == nspeed) {
260      return sp->speed;
261    }
262  }
263  return B0;
264}
265
266char *
267findblank(char *p, int reduce)
268{
269  int instring;
270
271  instring = 0;
272  while (*p) {
273    if (*p == '\\') {
274      if (reduce) {
275        memmove(p, p + 1, strlen(p));
276        if (!*p)
277          break;
278      } else
279        p++;
280    } else if (*p == '"') {
281      memmove(p, p + 1, strlen(p));
282      instring = !instring;
283      continue;
284    } else if (!instring && (issep(*p) || *p == '#'))
285      return p;
286    p++;
287  }
288
289  return instring ? NULL : p;
290}
291
292int
293MakeArgs(char *script, char **pvect, int maxargs, int reduce)
294{
295  int nargs;
296
297  nargs = 0;
298  while (*script) {
299    script += strspn(script, " \t");
300    if (*script) {
301      if (nargs >= maxargs - 1)
302	break;
303      *pvect++ = script;
304      nargs++;
305      script = findblank(script, reduce);
306      if (script == NULL)
307        return -1;
308      else if (*script == '#')
309	*script = '\0';
310      else if (*script)
311	*script++ = '\0';
312    }
313  }
314  *pvect = NULL;
315  return nargs;
316}
317