log.c revision 1.4 
1/*	$OpenBSD: log.c,v 1.4 2010/04/15 15:44:37 claudio Exp $ */
2
3/*
4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <errno.h>
20#include <stdarg.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <syslog.h>
25#include <unistd.h>
26
27#include "ldpd.h"
28#include "log.h"
29
30static const char * const procnames[] = {
31	"parent",
32	"ldpe",
33	"lde"
34};
35
36int	debug;
37int	verbose;
38
39void	 logit(int, const char *, ...);
40
41void
42log_init(int n_debug)
43{
44	extern char	*__progname;
45
46	debug = n_debug;
47	verbose = n_debug;
48
49	if (!debug)
50		openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
51
52	tzset();
53}
54
55void
56log_verbose(int v)
57{
58	verbose = v;
59}
60
61void
62logit(int pri, const char *fmt, ...)
63{
64	va_list	ap;
65
66	va_start(ap, fmt);
67	vlog(pri, fmt, ap);
68	va_end(ap);
69}
70
71void
72vlog(int pri, const char *fmt, va_list ap)
73{
74	char	*nfmt;
75
76	if (debug) {
77		/* best effort in out of mem situations */
78		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
79			vfprintf(stderr, fmt, ap);
80			fprintf(stderr, "\n");
81		} else {
82			vfprintf(stderr, nfmt, ap);
83			free(nfmt);
84		}
85		fflush(stderr);
86	} else
87		vsyslog(pri, fmt, ap);
88}
89
90void
91log_warn(const char *emsg, ...)
92{
93	char	*nfmt;
94	va_list	 ap;
95
96	/* best effort to even work in out of memory situations */
97	if (emsg == NULL)
98		logit(LOG_CRIT, "%s", strerror(errno));
99	else {
100		va_start(ap, emsg);
101
102		if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
103			/* we tried it... */
104			vlog(LOG_CRIT, emsg, ap);
105			logit(LOG_CRIT, "%s", strerror(errno));
106		} else {
107			vlog(LOG_CRIT, nfmt, ap);
108			free(nfmt);
109		}
110		va_end(ap);
111	}
112}
113
114void
115log_warnx(const char *emsg, ...)
116{
117	va_list	 ap;
118
119	va_start(ap, emsg);
120	vlog(LOG_CRIT, emsg, ap);
121	va_end(ap);
122}
123
124void
125log_info(const char *emsg, ...)
126{
127	va_list	 ap;
128
129	va_start(ap, emsg);
130	vlog(LOG_INFO, emsg, ap);
131	va_end(ap);
132}
133
134void
135log_debug(const char *emsg, ...)
136{
137	va_list	 ap;
138
139	if (verbose) {
140		va_start(ap, emsg);
141		vlog(LOG_DEBUG, emsg, ap);
142		va_end(ap);
143	}
144}
145
146void
147fatal(const char *emsg)
148{
149	if (emsg == NULL)
150		logit(LOG_CRIT, "fatal in %s: %s", procnames[ldpd_process],
151		    strerror(errno));
152	else
153		if (errno)
154			logit(LOG_CRIT, "fatal in %s: %s: %s",
155			    procnames[ldpd_process], emsg, strerror(errno));
156		else
157			logit(LOG_CRIT, "fatal in %s: %s",
158			    procnames[ldpd_process], emsg);
159
160	if (ldpd_process == PROC_MAIN)
161		exit(1);
162	else				/* parent copes via SIGCHLD */
163		_exit(1);
164}
165
166void
167fatalx(const char *emsg)
168{
169	errno = 0;
170	fatal(emsg);
171}
172
173/* names */
174const char *
175nbr_state_name(int state)
176{
177	switch (state) {
178	case NBR_STA_DOWN:
179		return ("DOWN");
180	case NBR_STA_PRESENT:
181		return ("PRESENT");
182	case NBR_STA_INITIAL:
183		return ("INITIALIZED");
184	case NBR_STA_OPENREC:
185		return ("OPENREC");
186	case NBR_STA_OPENSENT:
187		return ("OPENSENT");
188	case NBR_STA_OPER:
189		return ("OPERATIONAL");
190	case NBR_STA_ACTIVE:
191		return ("ACTIVE");
192	default:
193		return ("UNKNW");
194	}
195}
196
197const char *
198if_state_name(int state)
199{
200	switch (state) {
201	case IF_STA_DOWN:
202		return ("DOWN");
203	case IF_STA_LOOPBACK:
204		return ("LOOP");
205	case IF_STA_ACTIVE:
206		return ("ACTIVE");
207	default:
208		return ("UNKNW");
209	}
210}
211
212const char *
213if_type_name(enum iface_type type)
214{
215	switch (type) {
216	case IF_TYPE_POINTOPOINT:
217		return ("POINTOPOINT");
218	case IF_TYPE_BROADCAST:
219		return ("BROADCAST");
220	case IF_TYPE_NBMA:
221		return ("NBMA");
222	case IF_TYPE_POINTOMULTIPOINT:
223		return ("POINTOMULTIPOINT");
224	case IF_TYPE_VIRTUALLINK:
225		return ("VIRTUALLINK");
226	}
227	/* NOTREACHED */
228	return ("UNKNOWN");
229}
230
231const char *
232notification_name(u_int32_t status)
233{
234	static char buf[16];
235
236	switch (status) {
237	case S_SUCCESS:
238		return ("Success");
239	case S_BAD_LDP_ID:
240		return ("Bad LDP Identifier");
241	case S_BAD_PROTO_VER:
242		return ("Bad Protocol Version");
243	case S_BAD_PDU_LEN:
244		return ("Bad PDU Length");
245	case S_UNKNOWN_MSG:
246		return ("Unknown Message Type");
247	case S_BAD_MSG_LEN:
248		return ("Bad Message Length");
249	case S_UNKNOWN_TLV:
250		return ("Unknown TLV");
251	case S_BAD_TLV_LEN:
252		return ("Bad TLV Length");
253	case S_BAD_TLV_VAL:
254		return ("Malformed TLV Value");
255	case S_HOLDTIME_EXP:
256		return ("Hold Timer Expired");
257	case S_SHUTDOWN:
258		return ("Shutdown");
259	case S_LOOP_DETECTED:
260		return ("Loop Detected");
261	case S_UNKNOWN_FEC:
262		return ("Unknown FEC");
263	case S_NO_ROUTE:
264		return ("No Route");
265	case S_NO_LABEL_RES:
266		return ("No Label Resources");
267	case S_AVAILABLE:
268		return ("Label Resources Available");
269	case S_NO_HELLO:
270		return ("Session Rejected, No Hello");
271	case S_PARM_ADV_MODE:
272		return ("Rejected Advertisement Mode Parameter");
273	case S_MAX_PDU_LEN:
274		return ("Rejected Max PDU Length Parameter");
275	case S_PARM_L_RANGE:
276		return ("Rejected Label Range Parameter");
277	case S_KEEPALIVE_TMR:
278		return ("KeepAlive Timer Expired");
279	case S_LAB_REQ_ABRT:
280		return ("Label Request Aborted");
281	case S_MISS_MSG:
282		return ("Missing Message Parameters");
283	case S_UNSUP_ADDR:
284		return ("Unsupported Address Family");
285	case S_KEEPALIVE_BAD:
286		return ("Bad KeepAlive Time");
287	case S_INTERN_ERR:
288		return ("Internal Error");
289	default:
290		snprintf(buf, sizeof(buf), "[%08x]", status);
291		return (buf);
292	}
293}
294