1/*	$KAME: dump.c,v 1.13 2003/10/05 00:09:36 itojun Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1999 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD$
34 */
35
36#include <sys/types.h>
37#include <sys/capsicum.h>
38#include <sys/socket.h>
39#include <sys/queue.h>
40
41#include <net/if.h>
42#include <netinet/in.h>
43#include <netinet/icmp6.h>
44#include <arpa/inet.h>
45
46#include <capsicum_helpers.h>
47#include <errno.h>
48#include <stdio.h>
49#include <string.h>
50#include <syslog.h>
51#include <time.h>
52
53#include "rtsold.h"
54
55static const char * const ifstatstr[] =
56    { "IDLE", "DELAY", "PROBE", "DOWN", "TENTATIVE" };
57
58void
59rtsold_dump(FILE *fp)
60{
61	struct ifinfo *ifi;
62	struct rainfo *rai;
63	struct ra_opt *rao;
64	struct timespec now;
65	char ntopbuf[INET6_ADDRSTRLEN];
66
67	if (fseek(fp, 0, SEEK_SET) != 0) {
68		warnmsg(LOG_ERR, __func__, "fseek(): %s", strerror(errno));
69		return;
70	}
71	(void)ftruncate(fileno(fp), 0);
72
73	(void)clock_gettime(CLOCK_MONOTONIC_FAST, &now);
74
75	TAILQ_FOREACH(ifi, &ifinfo_head, ifi_next) {
76		fprintf(fp, "Interface %s\n", ifi->ifname);
77		fprintf(fp, "  probe interval: ");
78		if (ifi->probeinterval) {
79			fprintf(fp, "%d\n", ifi->probeinterval);
80			fprintf(fp, "  probe timer: %d\n", ifi->probetimer);
81		} else {
82			fprintf(fp, "infinity\n");
83			fprintf(fp, "  no probe timer\n");
84		}
85		fprintf(fp, "  interface status: %s\n",
86		    ifi->active > 0 ? "active" : "inactive");
87		fprintf(fp, "  other config: %s\n",
88		    ifi->otherconfig ? "on" : "off");
89		fprintf(fp, "  rtsold status: %s\n", ifstatstr[ifi->state]);
90		fprintf(fp, "  carrier detection: %s\n",
91		    ifi->mediareqok ? "available" : "unavailable");
92		fprintf(fp, "  probes: %d, dadcount = %d\n",
93		    ifi->probes, ifi->dadcount);
94		if (ifi->timer.tv_sec == tm_max.tv_sec &&
95		    ifi->timer.tv_nsec == tm_max.tv_nsec)
96			fprintf(fp, "  no timer\n");
97		else {
98			fprintf(fp, "  timer: interval=%d:%d, expire=%s\n",
99			    (int)ifi->timer.tv_sec,
100			    (int)ifi->timer.tv_nsec / 1000,
101			    (ifi->expire.tv_sec < now.tv_sec) ? "expired"
102			    : sec2str(&ifi->expire));
103		}
104		fprintf(fp, "  number of valid RAs: %d\n", ifi->racnt);
105
106		TAILQ_FOREACH(rai, &ifi->ifi_rainfo, rai_next) {
107			fprintf(fp, "   RA from %s\n",
108			    inet_ntop(AF_INET6, &rai->rai_saddr.sin6_addr,
109				ntopbuf, sizeof(ntopbuf)));
110			TAILQ_FOREACH(rao, &rai->rai_ra_opt, rao_next) {
111				fprintf(fp, "    option: ");
112				switch (rao->rao_type) {
113				case ND_OPT_RDNSS:
114					fprintf(fp, "RDNSS: %s (expire: %s)\n",
115					    (char *)rao->rao_msg,
116					    sec2str(&rao->rao_expire));
117					break;
118				case ND_OPT_DNSSL:
119					fprintf(fp, "DNSSL: %s (expire: %s)\n",
120					    (char *)rao->rao_msg,
121					    sec2str(&rao->rao_expire));
122					break;
123				default:
124					break;
125				}
126			}
127			fprintf(fp, "\n");
128		}
129	}
130	fflush(fp);
131}
132
133FILE *
134rtsold_init_dumpfile(const char *dumpfile)
135{
136	cap_rights_t rights;
137	FILE *fp;
138
139	if ((fp = fopen(dumpfile, "w")) == NULL) {
140		warnmsg(LOG_WARNING, __func__, "opening a dump file(%s): %s",
141		    dumpfile, strerror(errno));
142		return (NULL);
143	}
144
145	cap_rights_init(&rights, CAP_FSTAT, CAP_FTRUNCATE, CAP_SEEK, CAP_WRITE);
146	if (caph_rights_limit(fileno(fp), &rights) != 0) {
147		warnmsg(LOG_WARNING, __func__, "caph_rights_limit(%s): %s",
148		    dumpfile, strerror(errno));
149		return (NULL);
150	}
151	return (fp);
152}
153
154const char *
155sec2str(const struct timespec *total)
156{
157	static char result[256];
158	int days, hours, mins, secs;
159	int first = 1;
160	char *p = result;
161	char *ep = &result[sizeof(result)];
162	int n;
163	struct timespec now;
164	time_t tsec;
165
166	clock_gettime(CLOCK_MONOTONIC_FAST, &now);
167	tsec  = total->tv_sec;
168	tsec += total->tv_nsec / 1000 / 1000000;
169	tsec -= now.tv_sec;
170	tsec -= now.tv_nsec / 1000 / 1000000;
171
172	days = tsec / 3600 / 24;
173	hours = (tsec / 3600) % 24;
174	mins = (tsec / 60) % 60;
175	secs = tsec % 60;
176
177	if (days) {
178		first = 0;
179		n = snprintf(p, ep - p, "%dd", days);
180		if (n < 0 || n >= ep - p)
181			return "?";
182		p += n;
183	}
184	if (!first || hours) {
185		first = 0;
186		n = snprintf(p, ep - p, "%dh", hours);
187		if (n < 0 || n >= ep - p)
188			return "?";
189		p += n;
190	}
191	if (!first || mins) {
192		first = 0;
193		n = snprintf(p, ep - p, "%dm", mins);
194		if (n < 0 || n >= ep - p)
195			return "?";
196		p += n;
197	}
198	snprintf(p, ep - p, "%ds", secs);
199
200	return (result);
201}
202