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NetBSD/sbin/routed/trace.c

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/* $NetBSD: trace.c,v 1.20 1997/10/19 18:23:55 mycroft Exp $ */
/*
* Copyright (c) 1983, 1988, 1993
* The 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.
*/
#if !defined(lint) && !defined(sgi) && !defined(__NetBSD__)
static char sccsid[] = "@(#)trace.c 8.1 (Berkeley) 6/5/93";
#elif defined(__NetBSD__)
#include <sys/cdefs.h>
__RCSID("$NetBSD: trace.c,v 1.20 1997/10/19 18:23:55 mycroft Exp $");
#endif
#define RIPCMDS
#include "defs.h"
#include "pathnames.h"
#include <sys/stat.h>
#include <sys/signal.h>
#include <fcntl.h>
#ifdef sgi
/* use *stat64 for files on large filesystems */
#define stat stat64
#endif
#define NRECORDS 50 /* size of circular trace buffer */
int tracelevel, new_tracelevel;
FILE *ftrace = stdout; /* output trace file */
static char *sigtrace_pat = "%s";
static char savetracename[MAXPATHLEN+1];
char inittracename[MAXPATHLEN+1];
int file_trace; /* 1=tracing to file, not stdout */
static void trace_dump(void);
/* convert string to printable characters
*/
static char *
qstring(u_char *s, int len)
{
static char buf[8*20+1];
char *p;
u_char *s2, c;
for (p = buf; len != 0 && p < &buf[sizeof(buf)-1]; len--) {
c = *s++;
if (c == '\0') {
for (s2 = s+1; s2 < &s[len]; s2++) {
if (*s2 != '\0')
break;
}
if (s2 >= &s[len])
goto exit;
}
if (c >= ' ' && c < 0x7f && c != '\\') {
*p++ = c;
continue;
}
*p++ = '\\';
switch (c) {
case '\\':
*p++ = '\\';
break;
case '\n':
*p++= 'n';
break;
case '\r':
*p++= 'r';
break;
case '\t':
*p++ = 't';
break;
case '\b':
*p++ = 'b';
break;
default:
p += sprintf(p,"%o",c);
break;
}
}
exit:
*p = '\0';
return buf;
}
/* convert IP address to a string, but not into a single buffer
*/
char *
naddr_ntoa(naddr a)
{
#define NUM_BUFS 4
static int bufno;
static struct {
char str[16]; /* xxx.xxx.xxx.xxx\0 */
} bufs[NUM_BUFS];
char *s;
struct in_addr addr;
addr.s_addr = a;
s = strcpy(bufs[bufno].str, inet_ntoa(addr));
bufno = (bufno+1) % NUM_BUFS;
return s;
#undef NUM_BUFS
}
char *
saddr_ntoa(struct sockaddr *sa)
{
return (sa == 0) ? "?" : naddr_ntoa(S_ADDR(sa));
}
static char *
ts(time_t secs) {
static char s[20];
secs += epoch.tv_sec;
#ifdef sgi
(void)cftime(s, "%T", &secs);
#else
memmove(s, ctime(&secs)+11, 8);
s[8] = '\0';
#endif
return s;
}
/* On each event, display a time stamp.
* This assumes that 'now' is update once for each event, and
* that at least now.tv_usec changes.
*/
static struct timeval lastlog_time;
void
lastlog(void)
{
if (lastlog_time.tv_sec != now.tv_sec
|| lastlog_time.tv_usec != now.tv_usec) {
(void)fprintf(ftrace, "-- %s --\n", ts(now.tv_sec));
lastlog_time = now;
}
}
static void
tmsg(char *p, ...)
{
va_list args;
if (ftrace != 0) {
lastlog();
va_start(args, p);
vfprintf(ftrace, p, args);
(void)fputc('\n',ftrace);
fflush(ftrace);
}
}
static void
trace_close(void)
{
int fd;
fflush(stdout);
fflush(stderr);
if (ftrace != 0 && file_trace) {
if (ftrace != stdout)
fclose(ftrace);
ftrace = 0;
fd = open(_PATH_DEVNULL, O_RDWR);
(void)dup2(fd, STDIN_FILENO);
(void)dup2(fd, STDOUT_FILENO);
(void)dup2(fd, STDERR_FILENO);
(void)close(fd);
}
lastlog_time.tv_sec = 0;
}
void
trace_flush(void)
{
if (ftrace != 0) {
fflush(ftrace);
if (ferror(ftrace))
trace_off("tracing off: ", strerror(ferror(ftrace)));
}
}
void
trace_off(char *p, ...)
{
va_list args;
if (ftrace != 0) {
lastlog();
va_start(args, p);
vfprintf(ftrace, p, args);
(void)fputc('\n',ftrace);
}
trace_close();
new_tracelevel = tracelevel = 0;
}
/* log a change in tracing
*/
void
tracelevel_msg(char *pat,
int dump) /* -1=no dump, 0=default, 1=force */
{
static char *off_msgs[MAX_TRACELEVEL] = {
"Tracing actions stopped",
"Tracing packets stopped",
"Tracing packet contents stopped",
"Tracing kernel changes stopped",
};
static char *on_msgs[MAX_TRACELEVEL] = {
"Tracing actions started",
"Tracing packets started",
"Tracing packet contents started",
"Tracing kernel changes started",
};
u_int old_tracelevel = tracelevel;
if (new_tracelevel < 0)
new_tracelevel = 0;
else if (new_tracelevel > MAX_TRACELEVEL)
new_tracelevel = MAX_TRACELEVEL;
if (new_tracelevel < tracelevel) {
if (new_tracelevel <= 0) {
trace_off(pat, off_msgs[0]);
} else do {
tmsg(pat, off_msgs[tracelevel]);
}
while (--tracelevel != new_tracelevel);
} else if (new_tracelevel > tracelevel) {
do {
tmsg(pat, on_msgs[tracelevel++]);
} while (tracelevel != new_tracelevel);
}
if (dump > 0
|| (dump == 0 && old_tracelevel == 0 && tracelevel != 0))
trace_dump();
}
void
set_tracefile(char *filename,
char *pat,
int dump) /* -1=no dump, 0=default, 1=force */
{
struct stat stbuf;
FILE *n_ftrace;
char *fn;
/* Allow a null filename to increase the level if the trace file
* is already open or if coming from a trusted source, such as
* a signal or the command line.
*/
if (filename == 0 || filename[0] == '\0') {
filename = 0;
if (ftrace == 0) {
if (inittracename[0] == '\0') {
msglog("missing trace file name");
return;
}
fn = inittracename;
} else {
fn = 0;
}
} else if (!strcmp(filename,"dump/../table")) {
trace_dump();
return;
} else {
/* Allow the file specified with "-T file" to be reopened,
* but require all other names specified over the net to
* match the official path. The path can specify a directory
* in which the file is to be created.
*/
if (strcmp(filename, inittracename)
#ifdef _PATH_TRACE
&& (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
|| strstr(filename,"../")
|| 0 > stat(_PATH_TRACE, &stbuf))
#endif
) {
msglog("wrong trace file \"%s\"", filename);
return;
}
/* If the new tracefile exists, it must be a regular file.
*/
if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
msglog("wrong type (%#x) of trace file \"%s\"",
stbuf.st_mode, filename);
return;
}
fn = filename;
}
if (fn != 0) {
n_ftrace = fopen(fn, "a");
if (n_ftrace == 0) {
msglog("failed to open trace file \"%s\" %s",
fn, strerror(errno));
if (fn == inittracename)
inittracename[0] = '\0';
return;
}
tmsg("switch to trace file %s", fn);
file_trace = 1;
trace_close();
if (fn != savetracename)
strncpy(savetracename, fn, sizeof(savetracename)-1);
ftrace = n_ftrace;
fflush(stdout);
fflush(stderr);
dup2(fileno(ftrace), STDOUT_FILENO);
dup2(fileno(ftrace), STDERR_FILENO);
}
if (new_tracelevel == 0 || filename == 0)
new_tracelevel++;
tracelevel_msg(pat, dump != 0 ? dump : (filename != 0));
}
/* ARGSUSED */
void
sigtrace_on(int s)
{
new_tracelevel++;
sigtrace_pat = "SIGUSR1: %s";
}
/* ARGSUSED */
void
sigtrace_off(int s)
{
new_tracelevel--;
sigtrace_pat = "SIGUSR2: %s";
}
/* Set tracing after a signal.
*/
void
set_tracelevel(void)
{
if (new_tracelevel == tracelevel)
return;
/* If tracing entirely off, and there was no tracefile specified
* on the command line, then leave it off.
*/
if (new_tracelevel > tracelevel && ftrace == 0) {
if (savetracename[0] != '\0') {
set_tracefile(savetracename,sigtrace_pat,0);
} else if (inittracename[0] != '\0') {
set_tracefile(inittracename,sigtrace_pat,0);
} else {
new_tracelevel = 0;
return;
}
} else {
tracelevel_msg(sigtrace_pat, 0);
}
}
/* display an address
*/
char *
addrname(naddr addr, /* in network byte order */
naddr mask,
int force) /* 0=show mask if nonstandard, */
{ /* 1=always show mask, 2=never */
#define NUM_BUFS 4
static int bufno;
static struct {
char str[15+20];
} bufs[NUM_BUFS];
char *s, *sp;
naddr dmask;
int i;
s = strcpy(bufs[bufno].str, naddr_ntoa(addr));
bufno = (bufno+1) % NUM_BUFS;
if (force == 1 || (force == 0 && mask != std_mask(addr))) {
sp = &s[strlen(s)];
dmask = mask & -mask;
if (mask + dmask == 0) {
for (i = 0; i != 32 && ((1<<i) & mask) == 0; i++)
continue;
(void)sprintf(sp, "/%d", 32-i);
} else {
(void)sprintf(sp, " (mask %#x)", (u_int)mask);
}
}
return s;
#undef NUM_BUFS
}
/* display a bit-field
*/
struct bits {
int bits_mask;
int bits_clear;
char *bits_name;
};
static struct bits if_bits[] = {
{ IFF_LOOPBACK, 0, "LOOPBACK" },
{ IFF_POINTOPOINT, 0, "PT-TO-PT" },
{ 0, 0, 0}
};
static struct bits is_bits[] = {
{ IS_ALIAS, 0, "ALIAS" },
{ IS_SUBNET, 0, "" },
{ IS_REMOTE, (IS_NO_RDISC
| IS_BCAST_RDISC), "REMOTE" },
{ IS_PASSIVE, (IS_NO_RDISC
| IS_NO_RIP
| IS_NO_SUPER_AG
| IS_PM_RDISC
| IS_NO_AG), "PASSIVE" },
{ IS_EXTERNAL, 0, "EXTERNAL" },
{ IS_CHECKED, 0, "" },
{ IS_ALL_HOSTS, 0, "" },
{ IS_ALL_ROUTERS, 0, "" },
{ IS_DISTRUST, 0, "DISTRUST" },
{ IS_BROKE, IS_SICK, "BROKEN" },
{ IS_SICK, 0, "SICK" },
{ IS_DUP, 0, "DUPLICATE" },
{ IS_REDIRECT_OK, 0, "REDIRECT_OK" },
{ IS_NEED_NET_SYN, 0, "" },
{ IS_NO_AG, IS_NO_SUPER_AG, "NO_AG" },
{ IS_NO_SUPER_AG, 0, "NO_SUPER_AG" },
{ (IS_NO_RIPV1_IN
| IS_NO_RIPV2_IN
| IS_NO_RIPV1_OUT
| IS_NO_RIPV2_OUT), 0, "NO_RIP" },
{ (IS_NO_RIPV1_IN
| IS_NO_RIPV1_OUT), 0, "RIPV2" },
{ IS_NO_RIPV1_IN, 0, "NO_RIPV1_IN" },
{ IS_NO_RIPV2_IN, 0, "NO_RIPV2_IN" },
{ IS_NO_RIPV1_OUT, 0, "NO_RIPV1_OUT" },
{ IS_NO_RIPV2_OUT, 0, "NO_RIPV2_OUT" },
{ (IS_NO_ADV_IN
| IS_NO_SOL_OUT
| IS_NO_ADV_OUT), IS_BCAST_RDISC, "NO_RDISC" },
{ IS_NO_SOL_OUT, 0, "NO_SOLICIT" },
{ IS_SOL_OUT, 0, "SEND_SOLICIT" },
{ IS_NO_ADV_OUT, IS_BCAST_RDISC, "NO_RDISC_ADV" },
{ IS_ADV_OUT, 0, "RDISC_ADV" },
{ IS_BCAST_RDISC, 0, "BCAST_RDISC" },
{ IS_PM_RDISC, 0, "" },
{ 0, 0, "%#x"}
};
static struct bits rs_bits[] = {
{ RS_IF, 0, "IF" },
{ RS_NET_INT, RS_NET_SYN, "NET_INT" },
{ RS_NET_SYN, 0, "NET_SYN" },
{ RS_SUBNET, 0, "" },
{ RS_LOCAL, 0, "LOCAL" },
{ RS_MHOME, 0, "MHOME" },
{ RS_STATIC, 0, "STATIC" },
{ RS_RDISC, 0, "RDISC" },
{ 0, 0, "%#x"}
};
static void
trace_bits(struct bits *tbl,
u_int field,
int force)
{
int b;
char c;
if (force) {
(void)putc('<', ftrace);
c = 0;
} else {
c = '<';
}
while (field != 0
&& (b = tbl->bits_mask) != 0) {
if ((b & field) == b) {
if (tbl->bits_name[0] != '\0') {
if (c)
(void)putc(c, ftrace);
(void)fprintf(ftrace, "%s", tbl->bits_name);
c = '|';
}
if (0 == (field &= ~(b | tbl->bits_clear)))
break;
}
tbl++;
}
if (field != 0 && tbl->bits_name != 0) {
if (c)
(void)putc(c, ftrace);
(void)fprintf(ftrace, tbl->bits_name, field);
c = '|';
}
if (c != '<' || force)
(void)fputs("> ", ftrace);
}
char *
rtname(naddr dst,
naddr mask,
naddr gate)
{
static char buf[3*4+3+1+2+3 /* "xxx.xxx.xxx.xxx/xx-->" */
+3*4+3+1]; /* "xxx.xxx.xxx.xxx" */
int i;
i = sprintf(buf, "%-16s-->", addrname(dst, mask, 0));
(void)sprintf(&buf[i], "%-*s", 15+20-MAX(20,i), naddr_ntoa(gate));
return buf;
}
static void
print_rts(struct rt_spare *rts,
int force_metric, /* -1=suppress, 0=default */
int force_ifp, /* -1=suppress, 0=default */
int force_router, /* -1=suppress, 0=default, 1=display */
int force_tag, /* -1=suppress, 0=default, 1=display */
int force_time) /* 0=suppress, 1=display */
{
if (force_metric >= 0)
(void)fprintf(ftrace, "metric=%-2d ", rts->rts_metric);
if (force_ifp >= 0)
(void)fprintf(ftrace, "%s ", (rts->rts_ifp == 0 ?
"if?" : rts->rts_ifp->int_name));
if (force_router > 0
|| (force_router == 0 && rts->rts_router != rts->rts_gate))
(void)fprintf(ftrace, "router=%s ",
naddr_ntoa(rts->rts_router));
if (force_time > 0)
(void)fprintf(ftrace, "%s ", ts(rts->rts_time));
if (force_tag > 0
|| (force_tag == 0 && rts->rts_tag != 0))
(void)fprintf(ftrace, "tag=%#x ",
ntohs(rts->rts_tag));
}
void
trace_if(char *act,
struct interface *ifp)
{
if (!TRACEACTIONS || ftrace == 0)
return;
lastlog();
(void)fprintf(ftrace, "%-3s interface %-4s ", act, ifp->int_name);
(void)fprintf(ftrace, "%-15s-->%-15s ",
naddr_ntoa(ifp->int_addr),
addrname(((ifp->int_if_flags & IFF_POINTOPOINT)
? ifp->int_dstaddr
: htonl(ifp->int_net)),
ifp->int_mask, 1));
if (ifp->int_metric != 0)
(void)fprintf(ftrace, "metric=%d ", ifp->int_metric);
if (!IS_RIP_OUT_OFF(ifp->int_state)
&& ifp->int_d_metric != 0)
(void)fprintf(ftrace, "fake_default=%d ", ifp->int_d_metric);
trace_bits(if_bits, ifp->int_if_flags, 0);
trace_bits(is_bits, ifp->int_state, 0);
(void)fputc('\n',ftrace);
}
void
trace_upslot(struct rt_entry *rt,
struct rt_spare *rts,
naddr gate,
naddr router,
struct interface *ifp,
int metric,
u_short tag,
time_t new_time)
{
struct rt_spare new;
if (!TRACEACTIONS || ftrace == 0)
return;
if (rts->rts_gate == gate
&& rts->rts_router == router
&& rts->rts_metric == metric
&& rts->rts_tag == tag)
return;
new.rts_ifp = ifp;
new.rts_gate = gate;
new.rts_router = router;
new.rts_metric = metric;
new.rts_time = new_time;
new.rts_tag = tag;
lastlog();
if (gate == 0) {
(void)fprintf(ftrace, "Del #%d %-35s ",
(int)(rts - rt->rt_spares),
rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
print_rts(&new, 0,0,0,0,
rts != rt->rt_spares || AGE_RT(rt->rt_state,ifp));
} else if (rts->rts_gate != RIP_DEFAULT) {
(void)fprintf(ftrace, "Chg #%d %-35s ",
(int)(rts - rt->rt_spares),
rtname(rt->rt_dst, rt->rt_mask, rts->rts_gate));
print_rts(rts, 0,0,
rts->rts_gate != gate,
rts->rts_tag != tag,
rts != rt->rt_spares || AGE_RT(rt->rt_state,
rt->rt_ifp));
(void)fprintf(ftrace, "\n %19s%-16s ", "",
gate != rts->rts_gate ? naddr_ntoa(gate) : "");
print_rts(&new,
-(metric == rts->rts_metric),
-(ifp == rts->rts_ifp),
0,
rts->rts_tag != tag,
new_time != rts->rts_time && (rts != rt->rt_spares
|| AGE_RT(rt->rt_state,
ifp)));
} else {
(void)fprintf(ftrace, "Add #%d %-35s ",
(int)(rts - rt->rt_spares),
rtname(rt->rt_dst, rt->rt_mask, gate));
print_rts(&new, 0,0,0,0,
rts != rt->rt_spares || AGE_RT(rt->rt_state,ifp));
}
(void)fputc('\n',ftrace);
}
/* talk about a change made to the kernel table
*/
void
trace_kernel(char *p, ...)
{
va_list args;
if (!TRACEKERNEL || ftrace == 0)
return;
lastlog();
va_start(args, p);
vfprintf(ftrace, p, args);
(void)fputc('\n',ftrace);
}
/* display a message if tracing actions
*/
void
trace_act(char *p, ...)
{
va_list args;
if (!TRACEACTIONS || ftrace == 0)
return;
lastlog();
va_start(args, p);
vfprintf(ftrace, p, args);
(void)fputc('\n',ftrace);
}
/* display a message if tracing packets
*/
void
trace_pkt(char *p, ...)
{
va_list args;
if (!TRACEPACKETS || ftrace == 0)
return;
lastlog();
va_start(args, p);
vfprintf(ftrace, p, args);
(void)fputc('\n',ftrace);
}
void
trace_change(struct rt_entry *rt,
u_int state,
naddr gate, /* forward packets here */
naddr router, /* on the authority of this router */
int metric,
u_short tag,
struct interface *ifp,
time_t new_time,
char *label)
{
struct rt_spare new;
if (ftrace == 0)
return;
if (rt->rt_metric == metric
&& rt->rt_gate == gate
&& rt->rt_router == router
&& rt->rt_state == state
&& rt->rt_tag == tag)
return;
new.rts_ifp = ifp;
new.rts_gate = gate;
new.rts_router = router;
new.rts_metric = metric;
new.rts_time = new_time;
new.rts_tag = tag;
lastlog();
(void)fprintf(ftrace, "%s %-35s ",
label,
rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
print_rts(rt->rt_spares,
0,0,0,0, AGE_RT(rt->rt_state, rt->rt_ifp));
trace_bits(rs_bits, rt->rt_state, rt->rt_state != state);
(void)fprintf(ftrace, "\n%*s %19s%-16s ",
(int)strlen(label), "", "",
rt->rt_gate != gate ? naddr_ntoa(gate) : "");
print_rts(&new,
-(metric == rt->rt_metric),
-(ifp == rt->rt_ifp),
0,
rt->rt_tag != tag,
rt->rt_time != new_time && AGE_RT(rt->rt_state,ifp));
if (rt->rt_state != state)
trace_bits(rs_bits, state, 1);
(void)fputc('\n',ftrace);
}
void
trace_add_del(char * action, struct rt_entry *rt)
{
if (ftrace == 0)
return;
lastlog();
(void)fprintf(ftrace, "%s %-35s ",
action,
rtname(rt->rt_dst, rt->rt_mask, rt->rt_gate));
print_rts(rt->rt_spares, 0,0,0,0,AGE_RT(rt->rt_state,rt->rt_ifp));
trace_bits(rs_bits, rt->rt_state, 0);
(void)fputc('\n',ftrace);
}
/* ARGSUSED */
static int
walk_trace(struct radix_node *rn,
struct walkarg *w)
{
#define RT ((struct rt_entry *)rn)
struct rt_spare *rts;
int i, age = AGE_RT(RT->rt_state, RT->rt_ifp);
(void)fprintf(ftrace, " %-35s ",
rtname(RT->rt_dst, RT->rt_mask, RT->rt_gate));
print_rts(&RT->rt_spares[0], 0,0,0,0,age);
trace_bits(rs_bits, RT->rt_state, 0);
if (RT->rt_poison_time >= now_garbage
&& RT->rt_poison_metric < RT->rt_metric)
(void)fprintf(ftrace, "pm=%d@%s",
RT->rt_poison_metric, ts(RT->rt_poison_time));
rts = &RT->rt_spares[1];
for (i = 1; i < NUM_SPARES; i++, rts++) {
if (rts->rts_gate != RIP_DEFAULT) {
(void)fprintf(ftrace,"\n #%d%15s%-16s ",
i, "", naddr_ntoa(rts->rts_gate));
print_rts(rts, 0,0,0,0,1);
}
}
(void)fputc('\n',ftrace);
return 0;
}
static void
trace_dump(void)
{
struct interface *ifp;
if (ftrace == 0)
return;
lastlog();
(void)fputs("current daemon state:\n", ftrace);
for (ifp = ifnet; ifp != 0; ifp = ifp->int_next)
trace_if("", ifp);
(void)rn_walktree(rhead, walk_trace, 0);
}
void
trace_rip(char *dir1, char *dir2,
struct sockaddr_in *who,
struct interface *ifp,
struct rip *msg,
int size) /* total size of message */
{
struct netinfo *n, *lim;
# define NA (msg->rip_auths)
int i, seen_route;
if (!TRACEPACKETS || ftrace == 0)
return;
lastlog();
if (msg->rip_cmd >= RIPCMD_MAX
|| msg->rip_vers == 0) {
(void)fprintf(ftrace, "%s bad RIPv%d cmd=%d %s"
" %s.%d size=%d\n",
dir1, msg->rip_vers, msg->rip_cmd, dir2,
naddr_ntoa(who->sin_addr.s_addr),
ntohs(who->sin_port),
size);
return;
}
(void)fprintf(ftrace, "%s RIPv%d %s %s %s.%d%s%s\n",
dir1, msg->rip_vers, ripcmds[msg->rip_cmd], dir2,
naddr_ntoa(who->sin_addr.s_addr), ntohs(who->sin_port),
ifp ? " via " : "", ifp ? ifp->int_name : "");
if (!TRACECONTENTS)
return;
seen_route = 0;
switch (msg->rip_cmd) {
case RIPCMD_REQUEST:
case RIPCMD_RESPONSE:
n = msg->rip_nets;
lim = (struct netinfo *)((char*)msg + size);
for (; n < lim; n++) {
if (!seen_route
&& n->n_family == RIP_AF_UNSPEC
&& ntohl(n->n_metric) == HOPCNT_INFINITY
&& msg->rip_cmd == RIPCMD_REQUEST
&& (n+1 == lim
|| (n+2 == lim
&& (n+1)->n_family == RIP_AF_AUTH))) {
(void)fputs("\tQUERY ", ftrace);
if (n->n_dst != 0)
(void)fprintf(ftrace, "%s ",
naddr_ntoa(n->n_dst));
if (n->n_mask != 0)
(void)fprintf(ftrace, "mask=%#x ",
(u_int)ntohl(n->n_mask));
if (n->n_nhop != 0)
(void)fprintf(ftrace, "nhop=%s ",
naddr_ntoa(n->n_nhop));
if (n->n_tag != 0)
(void)fprintf(ftrace, "tag=%#x ",
ntohs(n->n_tag));
(void)fputc('\n',ftrace);
continue;
}
if (n->n_family == RIP_AF_AUTH) {
if (NA->a_type == RIP_AUTH_PW
&& n == msg->rip_nets) {
(void)fprintf(ftrace, "\tPassword"
" Authentication:"
" \"%s\"\n",
qstring(NA->au.au_pw,
RIP_AUTH_PW_LEN));
continue;
}
if (NA->a_type == RIP_AUTH_MD5
&& n == msg->rip_nets) {
(void)fprintf(ftrace,
"\tMD5 Authentication"
" len=%d KeyID=%u"
" seqno=%u"
" rsvd=%#x,%#x\n",
NA->au.a_md5.md5_pkt_len,
NA->au.a_md5.md5_keyid,
NA->au.a_md5.md5_seqno,
NA->au.a_md5.rsvd[0],
NA->au.a_md5.rsvd[1]);
continue;
}
(void)fprintf(ftrace,
"\tAuthentication"
" type %d: ",
ntohs(NA->a_type));
for (i = 0;
i < sizeof(NA->au.au_pw);
i++)
(void)fprintf(ftrace, "%02x ",
NA->au.au_pw[i]);
(void)fputc('\n',ftrace);
continue;
}
seen_route = 1;
if (n->n_family != RIP_AF_INET) {
(void)fprintf(ftrace,
"\t(af %d) %-18s mask=%#x ",
ntohs(n->n_family),
naddr_ntoa(n->n_dst),
(u_int)ntohl(n->n_mask));
} else if (msg->rip_vers == RIPv1) {
(void)fprintf(ftrace, "\t%-18s ",
addrname(n->n_dst,
ntohl(n->n_mask),
n->n_mask==0 ? 2 : 1));
} else {
(void)fprintf(ftrace, "\t%-18s ",
addrname(n->n_dst,
ntohl(n->n_mask),
n->n_mask==0 ? 2 : 0));
}
(void)fprintf(ftrace, "metric=%-2d ",
(u_int)ntohl(n->n_metric));
if (n->n_nhop != 0)
(void)fprintf(ftrace, " nhop=%s ",
naddr_ntoa(n->n_nhop));
if (n->n_tag != 0)
(void)fprintf(ftrace, "tag=%#x",
ntohs(n->n_tag));
(void)fputc('\n',ftrace);
}
if (size != (char *)n - (char *)msg)
(void)fprintf(ftrace, "truncated record, len %d\n",
size);
break;
case RIPCMD_TRACEON:
fprintf(ftrace, "\tfile=\"%.*s\"\n", size-4,
msg->rip_tracefile);
break;
case RIPCMD_TRACEOFF:
break;
}
}
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