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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
55 static const char * const ifstatstr[] =
56     { "IDLE", "DELAY", "PROBE", "DOWN", "TENTATIVE" };
57
58 void
59 rtsold_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, "  managed config: %s\n",
88                     ifi->managedconfig ? "on" : "off");
89                 fprintf(fp, "  other config: %s\n",
90                     ifi->otherconfig ? "on" : "off");
91                 fprintf(fp, "  rtsold status: %s\n", ifstatstr[ifi->state]);
92                 fprintf(fp, "  carrier detection: %s\n",
93                     ifi->mediareqok ? "available" : "unavailable");
94                 fprintf(fp, "  probes: %d, dadcount = %d\n",
95                     ifi->probes, ifi->dadcount);
96                 if (ifi->timer.tv_sec == tm_max.tv_sec &&
97                     ifi->timer.tv_nsec == tm_max.tv_nsec)
98                         fprintf(fp, "  no timer\n");
99                 else {
100                         fprintf(fp, "  timer: interval=%d:%d, expire=%s\n",
101                             (int)ifi->timer.tv_sec,
102                             (int)ifi->timer.tv_nsec / 1000,
103                             (ifi->expire.tv_sec < now.tv_sec) ? "expired"
104                             : sec2str(&ifi->expire));
105                 }
106                 fprintf(fp, "  number of valid RAs: %d\n", ifi->racnt);
107
108                 TAILQ_FOREACH(rai, &ifi->ifi_rainfo, rai_next) {
109                         fprintf(fp, "   RA from %s\n",
110                             inet_ntop(AF_INET6, &rai->rai_saddr.sin6_addr,
111                                 ntopbuf, sizeof(ntopbuf)));
112                         TAILQ_FOREACH(rao, &rai->rai_ra_opt, rao_next) {
113                                 fprintf(fp, "    option: ");
114                                 switch (rao->rao_type) {
115                                 case ND_OPT_RDNSS:
116                                         fprintf(fp, "RDNSS: %s (expire: %s)\n",
117                                             (char *)rao->rao_msg,
118                                             sec2str(&rao->rao_expire));
119                                         break;
120                                 case ND_OPT_DNSSL:
121                                         fprintf(fp, "DNSSL: %s (expire: %s)\n",
122                                             (char *)rao->rao_msg,
123                                             sec2str(&rao->rao_expire));
124                                         break;
125                                 default:
126                                         break;
127                                 }
128                         }
129                         fprintf(fp, "\n");
130                 }
131         }
132         fflush(fp);
133 }
134
135 FILE *
136 rtsold_init_dumpfile(const char *dumpfile)
137 {
138         cap_rights_t rights;
139         FILE *fp;
140
141         if ((fp = fopen(dumpfile, "w")) == NULL) {
142                 warnmsg(LOG_WARNING, __func__, "opening a dump file(%s): %s",
143                     dumpfile, strerror(errno));
144                 return (NULL);
145         }
146
147         cap_rights_init(&rights, CAP_FSTAT, CAP_FTRUNCATE, CAP_SEEK, CAP_WRITE);
148         if (caph_rights_limit(fileno(fp), &rights) != 0) {
149                 warnmsg(LOG_WARNING, __func__, "caph_rights_limit(%s): %s",
150                     dumpfile, strerror(errno));
151                 (void)fclose(fp);
152                 return (NULL);
153         }
154         return (fp);
155 }
156
157 const char *
158 sec2str(const struct timespec *total)
159 {
160         static char result[256];
161         int days, hours, mins, secs;
162         int first = 1;
163         char *p = result;
164         char *ep = &result[sizeof(result)];
165         int n;
166         struct timespec now;
167         time_t tsec;
168
169         clock_gettime(CLOCK_MONOTONIC_FAST, &now);
170         tsec  = total->tv_sec;
171         tsec += total->tv_nsec / 1000 / 1000000;
172         tsec -= now.tv_sec;
173         tsec -= now.tv_nsec / 1000 / 1000000;
174
175         days = tsec / 3600 / 24;
176         hours = (tsec / 3600) % 24;
177         mins = (tsec / 60) % 60;
178         secs = tsec % 60;
179
180         if (days) {
181                 first = 0;
182                 n = snprintf(p, ep - p, "%dd", days);
183                 if (n < 0 || n >= ep - p)
184                         return "?";
185                 p += n;
186         }
187         if (!first || hours) {
188                 first = 0;
189                 n = snprintf(p, ep - p, "%dh", hours);
190                 if (n < 0 || n >= ep - p)
191                         return "?";
192                 p += n;
193         }
194         if (!first || mins) {
195                 first = 0;
196                 n = snprintf(p, ep - p, "%dm", mins);
197                 if (n < 0 || n >= ep - p)
198                         return "?";
199                 p += n;
200         }
201         snprintf(p, ep - p, "%ds", secs);
202
203         return (result);
204 }