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- /*
- * Copyright (c) 1983, 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)trace.c 5.11 (Berkeley) 2/28/91";
- #endif /* not lint */
-
- /*
- * Routing Table Management Daemon
- */
- #define RIPCMDS
- #include "defs.h"
- #include <sys/stat.h>
- #include <sys/signal.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include "pathnames.h"
-
- #define NRECORDS 50 /* size of circular trace buffer */
- #ifdef DEBUG
- FILE *ftrace = stdout;
- int traceactions = 0;
- #endif
- static struct timeval lastlog;
- static char *savetracename;
-
- traceinit(ifp)
- register struct interface *ifp;
- {
- static int iftraceinit();
-
- if (iftraceinit(ifp, &ifp->int_input) &&
- iftraceinit(ifp, &ifp->int_output))
- return;
- tracehistory = 0;
- fprintf(stderr, "traceinit: can't init %s\n", ifp->int_name);
- }
-
- static
- iftraceinit(ifp, ifd)
- struct interface *ifp;
- register struct ifdebug *ifd;
- {
- register struct iftrace *t;
-
- ifd->ifd_records =
- (struct iftrace *)malloc(NRECORDS * sizeof (struct iftrace));
- if (ifd->ifd_records == 0)
- return (0);
- ifd->ifd_front = ifd->ifd_records;
- ifd->ifd_count = 0;
- for (t = ifd->ifd_records; t < ifd->ifd_records + NRECORDS; t++) {
- t->ift_size = 0;
- t->ift_packet = 0;
- }
- ifd->ifd_if = ifp;
- return (1);
- }
-
- traceon(file)
- char *file;
- {
- struct stat stbuf;
-
- if (ftrace != NULL)
- return;
- if (stat(file, &stbuf) >= 0 && (stbuf.st_mode & S_IFMT) != S_IFREG)
- return;
- savetracename = file;
- (void) gettimeofday(&now, (struct timezone *)NULL);
- ftrace = fopen(file, "a");
- if (ftrace == NULL)
- return;
- dup2(fileno(ftrace), 1);
- dup2(fileno(ftrace), 2);
- traceactions = 1;
- fprintf(ftrace, "Tracing enabled %s\n", ctime((time_t *)&now.tv_sec));
- }
-
- traceoff()
- {
- if (!traceactions)
- return;
- if (ftrace != NULL) {
- int fd = open(_PATH_DEVNULL, O_RDWR);
-
- fprintf(ftrace, "Tracing disabled %s\n",
- ctime((time_t *)&now.tv_sec));
- fflush(ftrace);
- (void) dup2(fd, 1);
- (void) dup2(fd, 2);
- (void) close(fd);
- fclose(ftrace);
- ftrace = NULL;
- }
- traceactions = 0;
- tracehistory = 0;
- tracepackets = 0;
- tracecontents = 0;
- }
-
- void
- sigtrace(s)
- int s;
- {
-
- if (s == SIGUSR2)
- traceoff();
- else if (ftrace == NULL && savetracename)
- traceon(savetracename);
- else
- bumploglevel();
- }
-
- /*
- * Move to next higher level of tracing when -t option processed or
- * SIGUSR1 is received. Successive levels are:
- * traceactions
- * traceactions + tracepackets
- * traceactions + tracehistory (packets and contents after change)
- * traceactions + tracepackets + tracecontents
- */
- bumploglevel()
- {
-
- (void) gettimeofday(&now, (struct timezone *)NULL);
- if (traceactions == 0) {
- traceactions++;
- if (ftrace)
- fprintf(ftrace, "Tracing actions started %s\n",
- ctime((time_t *)&now.tv_sec));
- } else if (tracepackets == 0) {
- tracepackets++;
- tracehistory = 0;
- tracecontents = 0;
- if (ftrace)
- fprintf(ftrace, "Tracing packets started %s\n",
- ctime((time_t *)&now.tv_sec));
- } else if (tracehistory == 0) {
- tracehistory++;
- if (ftrace)
- fprintf(ftrace, "Tracing history started %s\n",
- ctime((time_t *)&now.tv_sec));
- } else {
- tracepackets++;
- tracecontents++;
- tracehistory = 0;
- if (ftrace)
- fprintf(ftrace, "Tracing packet contents started %s\n",
- ctime((time_t *)&now.tv_sec));
- }
- if (ftrace)
- fflush(ftrace);
- }
-
- trace(ifd, who, p, len, m)
- register struct ifdebug *ifd;
- struct sockaddr *who;
- char *p;
- int len, m;
- {
- register struct iftrace *t;
-
- if (ifd->ifd_records == 0)
- return;
- t = ifd->ifd_front++;
- if (ifd->ifd_front >= ifd->ifd_records + NRECORDS)
- ifd->ifd_front = ifd->ifd_records;
- if (ifd->ifd_count < NRECORDS)
- ifd->ifd_count++;
- if (t->ift_size > 0 && t->ift_size < len && t->ift_packet) {
- free(t->ift_packet);
- t->ift_packet = 0;
- }
- t->ift_stamp = now;
- t->ift_who = *who;
- if (len > 0 && t->ift_packet == 0) {
- t->ift_packet = malloc(len);
- if (t->ift_packet == 0)
- len = 0;
- }
- if (len > 0)
- bcopy(p, t->ift_packet, len);
- t->ift_size = len;
- t->ift_metric = m;
- }
-
- traceaction(fd, action, rt)
- FILE *fd;
- char *action;
- struct rt_entry *rt;
- {
- struct sockaddr_in *dst, *gate;
- static struct bits {
- int t_bits;
- char *t_name;
- } flagbits[] = {
- { RTF_UP, "UP" },
- { RTF_GATEWAY, "GATEWAY" },
- { RTF_HOST, "HOST" },
- { 0 }
- }, statebits[] = {
- { RTS_PASSIVE, "PASSIVE" },
- { RTS_REMOTE, "REMOTE" },
- { RTS_INTERFACE,"INTERFACE" },
- { RTS_CHANGED, "CHANGED" },
- { RTS_INTERNAL, "INTERNAL" },
- { RTS_EXTERNAL, "EXTERNAL" },
- { RTS_SUBNET, "SUBNET" },
- { 0 }
- };
- register struct bits *p;
- register int first;
- char *cp;
- struct interface *ifp;
-
- if (fd == NULL)
- return;
- if (lastlog.tv_sec != now.tv_sec || lastlog.tv_usec != now.tv_usec) {
- fprintf(fd, "\n%.19s:\n", ctime((time_t *)&now.tv_sec));
- lastlog = now;
- }
- fprintf(fd, "%s ", action);
- dst = (struct sockaddr_in *)&rt->rt_dst;
- gate = (struct sockaddr_in *)&rt->rt_router;
- fprintf(fd, "dst %s, ", inet_ntoa(dst->sin_addr));
- fprintf(fd, "router %s, metric %d, flags",
- inet_ntoa(gate->sin_addr), rt->rt_metric);
- cp = " %s";
- for (first = 1, p = flagbits; p->t_bits > 0; p++) {
- if ((rt->rt_flags & p->t_bits) == 0)
- continue;
- fprintf(fd, cp, p->t_name);
- if (first) {
- cp = "|%s";
- first = 0;
- }
- }
- fprintf(fd, " state");
- cp = " %s";
- for (first = 1, p = statebits; p->t_bits > 0; p++) {
- if ((rt->rt_state & p->t_bits) == 0)
- continue;
- fprintf(fd, cp, p->t_name);
- if (first) {
- cp = "|%s";
- first = 0;
- }
- }
- fprintf(fd, " timer %d\n", rt->rt_timer);
- if (tracehistory && !tracepackets &&
- (rt->rt_state & RTS_PASSIVE) == 0 && rt->rt_ifp)
- dumpif(fd, rt->rt_ifp);
- fflush(fd);
- if (ferror(fd))
- traceoff();
- }
-
- tracenewmetric(fd, rt, newmetric)
- FILE *fd;
- struct rt_entry *rt;
- int newmetric;
- {
- struct sockaddr_in *dst, *gate;
-
- if (fd == NULL)
- return;
- if (lastlog.tv_sec != now.tv_sec || lastlog.tv_usec != now.tv_usec) {
- fprintf(fd, "\n%.19s:\n", ctime((time_t *)&now.tv_sec));
- lastlog = now;
- }
- dst = (struct sockaddr_in *)&rt->rt_dst;
- gate = (struct sockaddr_in *)&rt->rt_router;
- fprintf(fd, "CHANGE metric dst %s, ", inet_ntoa(dst->sin_addr));
- fprintf(fd, "router %s, from %d to %d\n",
- inet_ntoa(gate->sin_addr), rt->rt_metric, newmetric);
- fflush(fd);
- if (ferror(fd))
- traceoff();
- }
-
- dumpif(fd, ifp)
- FILE *fd;
- register struct interface *ifp;
- {
- if (ifp->int_input.ifd_count || ifp->int_output.ifd_count) {
- fprintf(fd, "*** Packet history for interface %s ***\n",
- ifp->int_name);
- #ifdef notneeded
- dumptrace(fd, "to", &ifp->int_output);
- #endif
- dumptrace(fd, "from", &ifp->int_input);
- fprintf(fd, "*** end packet history ***\n");
- }
- }
-
- dumptrace(fd, dir, ifd)
- FILE *fd;
- char *dir;
- register struct ifdebug *ifd;
- {
- register struct iftrace *t;
- char *cp = !strcmp(dir, "to") ? "Output" : "Input";
-
- if (ifd->ifd_front == ifd->ifd_records &&
- ifd->ifd_front->ift_size == 0) {
- fprintf(fd, "%s: no packets.\n", cp);
- fflush(fd);
- return;
- }
- fprintf(fd, "%s trace:\n", cp);
- t = ifd->ifd_front - ifd->ifd_count;
- if (t < ifd->ifd_records)
- t += NRECORDS;
- for ( ; ifd->ifd_count; ifd->ifd_count--, t++) {
- if (t >= ifd->ifd_records + NRECORDS)
- t = ifd->ifd_records;
- if (t->ift_size == 0)
- continue;
- dumppacket(fd, dir, &t->ift_who, t->ift_packet, t->ift_size,
- &t->ift_stamp);
- }
- }
-
- dumppacket(fd, dir, who, cp, size, stamp)
- FILE *fd;
- struct sockaddr_in *who; /* should be sockaddr */
- char *dir, *cp;
- register int size;
- struct timeval *stamp;
- {
- register struct rip *msg = (struct rip *)cp;
- register struct netinfo *n;
-
- if (fd == NULL)
- return;
- if (msg->rip_cmd && msg->rip_cmd < RIPCMD_MAX)
- fprintf(fd, "%s %s %s.%d %.19s:\n", ripcmds[msg->rip_cmd],
- dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port),
- ctime((time_t *)&stamp->tv_sec));
- else {
- fprintf(fd, "Bad cmd 0x%x %s %x.%d %.19s\n", msg->rip_cmd,
- dir, inet_ntoa(who->sin_addr), ntohs(who->sin_port));
- fprintf(fd, "size=%d cp=%x packet=%x\n", size, cp, packet,
- ctime((time_t *)&stamp->tv_sec));
- fflush(fd);
- return;
- }
- if (tracepackets && tracecontents == 0) {
- fflush(fd);
- return;
- }
- switch (msg->rip_cmd) {
-
- case RIPCMD_REQUEST:
- case RIPCMD_RESPONSE:
- size -= 4 * sizeof (char);
- n = msg->rip_nets;
- for (; size > 0; n++, size -= sizeof (struct netinfo)) {
- if (size < sizeof (struct netinfo)) {
- fprintf(fd, "(truncated record, len %d)\n",
- size);
- break;
- }
- if (sizeof(n->rip_dst.sa_family) > 1)
- n->rip_dst.sa_family = ntohs(n->rip_dst.sa_family);
-
- switch ((int)n->rip_dst.sa_family) {
-
- case AF_INET:
- fprintf(fd, "\tdst %s metric %d\n",
- #define satosin(sa) ((struct sockaddr_in *)&sa)
- inet_ntoa(satosin(n->rip_dst)->sin_addr),
- ntohl(n->rip_metric));
- break;
-
- default:
- fprintf(fd, "\taf %d? metric %d\n",
- n->rip_dst.sa_family,
- ntohl(n->rip_metric));
- break;
- }
- }
- break;
-
- case RIPCMD_TRACEON:
- fprintf(fd, "\tfile=%*s\n", size, msg->rip_tracefile);
- break;
-
- case RIPCMD_TRACEOFF:
- break;
- }
- fflush(fd);
- if (ferror(fd))
- traceoff();
- }
-