defs.c revision 50479 
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 50479 1999-08-28 01:35:59Z peter $
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_ALL, "*" },
94  { 0, 0 }
95};
96
97const char *
98mode2Nam(int mode)
99{
100  int m;
101
102  for (m = 0; modes[m].mode; m++)
103    if (modes[m].mode == mode)
104      return modes[m].name;
105
106  return "unknown";
107}
108
109int
110Nam2mode(const char *name)
111{
112  int m, got, len;
113
114  len = strlen(name);
115  got = -1;
116  for (m = 0; modes[m].mode; m++)
117    if (!strncasecmp(name, modes[m].name, len)) {
118      if (modes[m].name[len] == '\0')
119	return modes[m].mode;
120      if (got != -1)
121        return 0;
122      got = m;
123    }
124
125  return got == -1 ? 0 : modes[got].mode;
126}
127
128struct in_addr
129GetIpAddr(const char *cp)
130{
131  struct in_addr ipaddr;
132
133  if (!strcasecmp(cp, "default"))
134    ipaddr.s_addr = INADDR_ANY;
135  else if (inet_aton(cp, &ipaddr) == 0) {
136    const char *ptr;
137
138    /* Any illegal characters ? */
139    for (ptr = cp; *ptr != '\0'; ptr++)
140      if (!isalnum(*ptr) && strchr("-.", *ptr) == NULL)
141        break;
142
143    if (*ptr == '\0') {
144      struct hostent *hp;
145
146      hp = gethostbyname(cp);
147      if (hp && hp->h_addrtype == AF_INET)
148        memcpy(&ipaddr, hp->h_addr, hp->h_length);
149      else
150        ipaddr.s_addr = INADDR_NONE;
151    } else
152      ipaddr.s_addr = INADDR_NONE;
153  }
154
155  return ipaddr;
156}
157
158static const struct speeds {
159  int nspeed;
160  speed_t speed;
161} speeds[] = {
162#ifdef B50
163  { 50, B50, },
164#endif
165#ifdef B75
166  { 75, B75, },
167#endif
168#ifdef B110
169  { 110, B110, },
170#endif
171#ifdef B134
172  { 134, B134, },
173#endif
174#ifdef B150
175  { 150, B150, },
176#endif
177#ifdef B200
178  { 200, B200, },
179#endif
180#ifdef B300
181  { 300, B300, },
182#endif
183#ifdef B600
184  { 600, B600, },
185#endif
186#ifdef B1200
187  { 1200, B1200, },
188#endif
189#ifdef B1800
190  { 1800, B1800, },
191#endif
192#ifdef B2400
193  { 2400, B2400, },
194#endif
195#ifdef B4800
196  { 4800, B4800, },
197#endif
198#ifdef B9600
199  { 9600, B9600, },
200#endif
201#ifdef B19200
202  { 19200, B19200, },
203#endif
204#ifdef B38400
205  { 38400, B38400, },
206#endif
207#ifndef _POSIX_SOURCE
208#ifdef B7200
209  { 7200, B7200, },
210#endif
211#ifdef B14400
212  { 14400, B14400, },
213#endif
214#ifdef B28800
215  { 28800, B28800, },
216#endif
217#ifdef B57600
218  { 57600, B57600, },
219#endif
220#ifdef B76800
221  { 76800, B76800, },
222#endif
223#ifdef B115200
224  { 115200, B115200, },
225#endif
226#ifdef B230400
227  { 230400, B230400, },
228#endif
229#ifdef EXTA
230  { 19200, EXTA, },
231#endif
232#ifdef EXTB
233  { 38400, EXTB, },
234#endif
235#endif				/* _POSIX_SOURCE */
236  { 0, 0 }
237};
238
239int
240SpeedToInt(speed_t speed)
241{
242  const struct speeds *sp;
243
244  for (sp = speeds; sp->nspeed; sp++) {
245    if (sp->speed == speed) {
246      return sp->nspeed;
247    }
248  }
249  return 0;
250}
251
252speed_t
253IntToSpeed(int nspeed)
254{
255  const struct speeds *sp;
256
257  for (sp = speeds; sp->nspeed; sp++) {
258    if (sp->nspeed == nspeed) {
259      return sp->speed;
260    }
261  }
262  return B0;
263}
264
265static char *
266findblank(char *p, int instring)
267{
268  if (instring) {
269    while (*p) {
270      if (*p == '\\') {
271	memmove(p, p + 1, strlen(p));
272	if (!*p)
273	  break;
274      } else if (*p == '"')
275	return (p);
276      p++;
277    }
278  } else {
279    while (*p) {
280      if (issep(*p))
281	return (p);
282      p++;
283    }
284  }
285
286  return p;
287}
288
289int
290MakeArgs(char *script, char **pvect, int maxargs)
291{
292  int nargs, nb;
293  int instring;
294
295  nargs = 0;
296  while (*script) {
297    nb = strspn(script, " \t");
298    script += nb;
299    if (*script) {
300      if (*script == '"') {
301	instring = 1;
302	script++;
303	if (*script == '\0')
304	  break;		/* Shouldn't return here. Need to NULL
305				 * terminate below */
306      } else
307	instring = 0;
308      if (nargs >= maxargs - 1)
309	break;
310      *pvect++ = script;
311      nargs++;
312      script = findblank(script, instring);
313      if (*script)
314	*script++ = '\0';
315    }
316  }
317  *pvect = NULL;
318  return nargs;
319}
320