log.c revision 38472 
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 *	$Id: log.c,v 1.34 1998/08/09 15:34:11 brian Exp $
27 */
28
29#include <sys/types.h>
30
31#include <stdarg.h>
32#include <stdio.h>
33#include <string.h>
34#include <syslog.h>
35#include <termios.h>
36
37#include "defs.h"
38#include "command.h"
39#include "mbuf.h"
40#include "log.h"
41#include "descriptor.h"
42#include "prompt.h"
43
44static const char *LogNames[] = {
45  "Async",
46  "CBCP",
47  "CCP",
48  "Chat",
49  "Command",
50  "Connect",
51  "Debug",
52  "HDLC",
53  "ID0",
54  "IPCP",
55  "LCP",
56  "LQM",
57  "Phase",
58  "TCP/IP",
59  "Timer",
60  "Tun",
61  "Warning",
62  "Error",
63  "Alert"
64};
65
66#define MSK(n) (1<<((n)-1))
67
68static u_long LogMask = MSK(LogPHASE);
69static u_long LogMaskLocal = MSK(LogERROR) | MSK(LogALERT) | MSK(LogWARN);
70static int LogTunno = -1;
71static struct prompt *promptlist;	/* Where to log local stuff */
72int log_PromptListChanged;
73
74struct prompt *
75log_PromptList()
76{
77  return promptlist;
78}
79
80void
81log_RegisterPrompt(struct prompt *prompt)
82{
83  prompt->next = promptlist;
84  promptlist = prompt;
85  prompt->active = 1;
86  log_DiscardAllLocal(&prompt->logmask);
87}
88
89void
90log_ActivatePrompt(struct prompt *prompt)
91{
92  prompt->active = 1;
93  LogMaskLocal |= prompt->logmask;
94}
95
96static void
97LogSetMaskLocal(void)
98{
99  struct prompt *p;
100
101  LogMaskLocal = MSK(LogERROR) | MSK(LogALERT) | MSK(LogWARN);
102  for (p = promptlist; p; p = p->next)
103    LogMaskLocal |= p->logmask;
104}
105
106void
107log_DeactivatePrompt(struct prompt *prompt)
108{
109  if (prompt->active) {
110    prompt->active = 0;
111    LogSetMaskLocal();
112  }
113}
114
115void
116log_UnRegisterPrompt(struct prompt *prompt)
117{
118  if (prompt) {
119    struct prompt **p;
120
121    for (p = &promptlist; *p; p = &(*p)->next)
122      if (*p == prompt) {
123        *p = prompt->next;
124        prompt->next = NULL;
125        break;
126      }
127    LogSetMaskLocal();
128    log_PromptListChanged++;
129  }
130}
131
132void
133log_DestroyPrompts(struct server *s)
134{
135  struct prompt *p, *pn;
136
137  p = promptlist;
138  while (p) {
139    pn = p->next;
140    if (s && p->owner != s) {
141      p->next = NULL;
142      prompt_Destroy(p, 1);
143    }
144    p = pn;
145  }
146}
147
148void
149log_DisplayPrompts()
150{
151  struct prompt *p;
152
153  for (p = promptlist; p; p = p->next)
154    prompt_Required(p);
155}
156
157void
158log_WritePrompts(struct datalink *dl, const char *fmt,...)
159{
160  va_list ap;
161  struct prompt *p;
162
163  va_start(ap, fmt);
164  for (p = promptlist; p; p = p->next)
165    if (prompt_IsTermMode(p, dl))
166      prompt_vPrintf(p, fmt, ap);
167  va_end(ap);
168}
169
170void
171log_SetTtyCommandMode(struct datalink *dl)
172{
173  struct prompt *p;
174
175  for (p = promptlist; p; p = p->next)
176    if (prompt_IsTermMode(p, dl))
177      prompt_TtyCommandMode(p);
178}
179
180static int
181syslogLevel(int lev)
182{
183  switch (lev) {
184  case LogDEBUG:
185  case LogTIMER:
186    return LOG_DEBUG;
187  case LogWARN:
188    return LOG_WARNING;
189  case LogERROR:
190    return LOG_ERR;
191  case LogALERT:
192    return LOG_ALERT;
193  }
194  return lev >= LogMIN && lev <= LogMAX ? LOG_INFO : 0;
195}
196
197const char *
198log_Name(int id)
199{
200  return id < LogMIN || id > LogMAX ? "Unknown" : LogNames[id - 1];
201}
202
203void
204log_Keep(int id)
205{
206  if (id >= LogMIN && id <= LogMAXCONF)
207    LogMask |= MSK(id);
208}
209
210void
211log_KeepLocal(int id, u_long *mask)
212{
213  if (id >= LogMIN && id <= LogMAXCONF) {
214    LogMaskLocal |= MSK(id);
215    *mask |= MSK(id);
216  }
217}
218
219void
220log_Discard(int id)
221{
222  if (id >= LogMIN && id <= LogMAXCONF)
223    LogMask &= ~MSK(id);
224}
225
226void
227log_DiscardLocal(int id, u_long *mask)
228{
229  if (id >= LogMIN && id <= LogMAXCONF) {
230    *mask &= ~MSK(id);
231    LogSetMaskLocal();
232  }
233}
234
235void
236log_DiscardAll()
237{
238  LogMask = 0;
239}
240
241void
242log_DiscardAllLocal(u_long *mask)
243{
244  *mask = MSK(LogERROR) | MSK(LogALERT) | MSK(LogWARN);
245  LogSetMaskLocal();
246}
247
248int
249log_IsKept(int id)
250{
251  if (id < LogMIN || id > LogMAX)
252    return 0;
253  if (id > LogMAXCONF)
254    return LOG_KEPT_LOCAL | LOG_KEPT_SYSLOG;
255
256  return ((LogMaskLocal & MSK(id)) ? LOG_KEPT_LOCAL : 0) |
257    ((LogMask & MSK(id)) ? LOG_KEPT_SYSLOG : 0);
258}
259
260int
261log_IsKeptLocal(int id, u_long mask)
262{
263  if (id < LogMIN || id > LogMAX)
264    return 0;
265  if (id > LogMAXCONF)
266    return LOG_KEPT_LOCAL | LOG_KEPT_SYSLOG;
267
268  return ((mask & MSK(id)) ? LOG_KEPT_LOCAL : 0) |
269    ((LogMask & MSK(id)) ? LOG_KEPT_SYSLOG : 0);
270}
271
272void
273log_Open(const char *Name)
274{
275  openlog(Name, LOG_PID, LOG_DAEMON);
276}
277
278void
279log_SetTun(int tunno)
280{
281  LogTunno = tunno;
282}
283
284void
285log_Close()
286{
287  closelog();
288  LogTunno = -1;
289}
290
291void
292log_Printf(int lev, const char *fmt,...)
293{
294  va_list ap;
295  struct prompt *prompt;
296
297  va_start(ap, fmt);
298  if (log_IsKept(lev)) {
299    char nfmt[200];
300
301    if ((log_IsKept(lev) & LOG_KEPT_LOCAL) && promptlist) {
302      if ((log_IsKept(LogTUN) & LOG_KEPT_LOCAL) && LogTunno != -1)
303        snprintf(nfmt, sizeof nfmt, "%s%d: %s: %s", TUN_NAME,
304	         LogTunno, log_Name(lev), fmt);
305      else
306        snprintf(nfmt, sizeof nfmt, "%s: %s", log_Name(lev), fmt);
307
308      for (prompt = promptlist; prompt; prompt = prompt->next)
309        if (lev > LogMAXCONF || (prompt->logmask & MSK(lev)))
310          prompt_vPrintf(prompt, nfmt, ap);
311    }
312
313    if ((log_IsKept(lev) & LOG_KEPT_SYSLOG) &&
314        (lev != LogWARN || !promptlist)) {
315      if ((log_IsKept(LogTUN) & LOG_KEPT_SYSLOG) && LogTunno != -1)
316        snprintf(nfmt, sizeof nfmt, "%s%d: %s: %s", TUN_NAME,
317	         LogTunno, log_Name(lev), fmt);
318      else
319        snprintf(nfmt, sizeof nfmt, "%s: %s", log_Name(lev), fmt);
320      vsyslog(syslogLevel(lev), nfmt, ap);
321    }
322  }
323  va_end(ap);
324}
325
326void
327log_DumpBp(int lev, const char *hdr, const struct mbuf *bp)
328{
329  if (log_IsKept(lev)) {
330    char buf[50];
331    char *b;
332    const u_char *ptr;
333    int f;
334
335    if (hdr && *hdr)
336      log_Printf(lev, "%s\n", hdr);
337
338    b = buf;
339    do {
340      f = bp->cnt;
341      ptr = CONST_MBUF_CTOP(bp);
342      while (f--) {
343	sprintf(b, " %02x", (int) *ptr++);
344        b += 3;
345        if (b == buf + sizeof buf - 2) {
346          strcpy(b, "\n");
347          log_Printf(lev, buf);
348          b = buf;
349        }
350      }
351    } while ((bp = bp->next) != NULL);
352
353    if (b > buf) {
354      strcpy(b, "\n");
355      log_Printf(lev, buf);
356    }
357  }
358}
359
360void
361log_DumpBuff(int lev, const char *hdr, const u_char * ptr, int n)
362{
363  if (log_IsKept(lev)) {
364    char buf[50];
365    char *b;
366
367    if (hdr && *hdr)
368      log_Printf(lev, "%s\n", hdr);
369    while (n > 0) {
370      b = buf;
371      for (b = buf; b != buf + sizeof buf - 2 && n--; b += 3)
372	sprintf(b, " %02x", (int) *ptr++);
373      strcpy(b, "\n");
374      log_Printf(lev, buf);
375    }
376  }
377}
378
379int
380log_ShowLevel(struct cmdargs const *arg)
381{
382  int i;
383
384  prompt_Printf(arg->prompt, "Log:  ");
385  for (i = LogMIN; i <= LogMAX; i++)
386    if (log_IsKept(i) & LOG_KEPT_SYSLOG)
387      prompt_Printf(arg->prompt, " %s", log_Name(i));
388
389  prompt_Printf(arg->prompt, "\nLocal:");
390  for (i = LogMIN; i <= LogMAX; i++)
391    if (log_IsKeptLocal(i, arg->prompt->logmask) & LOG_KEPT_LOCAL)
392      prompt_Printf(arg->prompt, " %s", log_Name(i));
393
394  prompt_Printf(arg->prompt, "\n");
395
396  return 0;
397}
398
399int
400log_SetLevel(struct cmdargs const *arg)
401{
402  int i, res, argc, local;
403  char const *const *argv, *argp;
404
405  argc = arg->argc - arg->argn;
406  argv = arg->argv + arg->argn;
407  res = 0;
408
409  if (argc == 0 || strcasecmp(argv[0], "local"))
410    local = 0;
411  else {
412    if (arg->prompt == NULL) {
413      log_Printf(LogWARN, "set log local: Only available on the command line\n");
414      return 1;
415    }
416    argc--;
417    argv++;
418    local = 1;
419  }
420
421  if (argc == 0 || (argv[0][0] != '+' && argv[0][0] != '-')) {
422    if (local)
423      log_DiscardAllLocal(&arg->prompt->logmask);
424    else
425      log_DiscardAll();
426  }
427
428  while (argc--) {
429    argp = **argv == '+' || **argv == '-' ? *argv + 1 : *argv;
430    for (i = LogMIN; i <= LogMAX; i++)
431      if (strcasecmp(argp, log_Name(i)) == 0) {
432	if (**argv == '-') {
433          if (local)
434            log_DiscardLocal(i, &arg->prompt->logmask);
435          else
436	    log_Discard(i);
437	} else if (local)
438          log_KeepLocal(i, &arg->prompt->logmask);
439        else
440          log_Keep(i);
441	break;
442      }
443    if (i > LogMAX) {
444      log_Printf(LogWARN, "%s: Invalid log value\n", argp);
445      res = -1;
446    }
447    argv++;
448  }
449  return res;
450}
451
452int
453log_ShowWho(struct cmdargs const *arg)
454{
455  struct prompt *p;
456
457  for (p = promptlist; p; p = p->next) {
458    prompt_Printf(arg->prompt, "%s (%s)", p->src.type, p->src.from);
459    if (p == arg->prompt)
460      prompt_Printf(arg->prompt, " *");
461    if (!p->active)
462      prompt_Printf(arg->prompt, " ^Z");
463    prompt_Printf(arg->prompt, "\n");
464  }
465
466  return 0;
467}
468