*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-dvmrp.c,v 1.15 1999-10-30 05:11:12 itojun Exp $ (LBL)";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-dvmrp.c,v 1.27 2003-11-19 09:42:04 guy Exp $ (LBL)";
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/socket.h>
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
-#include <netinet/tcp.h>
+#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
-#include <unistd.h>
#include "interface.h"
+#include "extract.h"
#include "addrtoname.h"
/*
#define DVMRP_PROBE 1 /* for finding neighbors */
#define DVMRP_REPORT 2 /* for reporting some or all routes */
#define DVMRP_ASK_NEIGHBORS 3 /* sent by mapper, asking for a list */
- /*
- * of this router's neighbors
- */
+ /* of this router's neighbors */
#define DVMRP_NEIGHBORS 4 /* response to such a request */
#define DVMRP_ASK_NEIGHBORS2 5 /* as above, want new format reply */
#define DVMRP_NEIGHBORS2 6
#define DVMRP_NF_DISABLED 0x20 /* administratively disabled */
#define DVMRP_NF_QUERIER 0x40 /* I am the subnet's querier */
-static void print_probe(const u_char *, const u_char *, u_int);
-static void print_report(const u_char *, const u_char *, u_int);
-static void print_neighbors(const u_char *, const u_char *, u_int);
-static void print_neighbors2(const u_char *, const u_char *, u_int);
-static void print_prune(const u_char *, const u_char *, u_int);
-static void print_graft(const u_char *, const u_char *, u_int);
-static void print_graft_ack(const u_char *, const u_char *, u_int);
+static int print_probe(const u_char *, const u_char *, u_int);
+static int print_report(const u_char *, const u_char *, u_int);
+static int print_neighbors(const u_char *, const u_char *, u_int);
+static int print_neighbors2(const u_char *, const u_char *, u_int);
+static int print_prune(const u_char *);
+static int print_graft(const u_char *);
+static int print_graft_ack(const u_char *);
static u_int32_t target_level;
if (bp >= ep)
return;
+ TCHECK(bp[1]);
type = bp[1];
- bp += 8;
- /*
- * Skip IGMP header
- */
+ /* Skip IGMP header */
+ bp += 8;
len -= 8;
switch (type) {
case DVMRP_PROBE:
printf(" Probe");
- if (vflag)
- print_probe(bp, ep, len);
+ if (vflag) {
+ if (print_probe(bp, ep, len) < 0)
+ goto trunc;
+ }
break;
case DVMRP_REPORT:
printf(" Report");
- if (vflag)
- print_report(bp, ep, len);
+ if (vflag > 1) {
+ if (print_report(bp, ep, len) < 0)
+ goto trunc;
+ }
break;
case DVMRP_ASK_NEIGHBORS:
case DVMRP_NEIGHBORS:
printf(" Neighbors(old)");
- print_neighbors(bp, ep, len);
+ if (print_neighbors(bp, ep, len) < 0)
+ goto trunc;
break;
case DVMRP_ASK_NEIGHBORS2:
* address field
*/
bp -= 4;
+ TCHECK2(bp[0], 4);
target_level = (bp[0] << 24) | (bp[1] << 16) |
(bp[2] << 8) | bp[3];
bp += 4;
- print_neighbors2(bp, ep, len);
+ if (print_neighbors2(bp, ep, len) < 0)
+ goto trunc;
break;
case DVMRP_PRUNE:
printf(" Prune");
- print_prune(bp, ep, len);
+ if (print_prune(bp) < 0)
+ goto trunc;
break;
case DVMRP_GRAFT:
printf(" Graft");
- print_graft(bp, ep, len);
+ if (print_graft(bp) < 0)
+ goto trunc;
break;
case DVMRP_GRAFT_ACK:
printf(" Graft-ACK");
- print_graft_ack(bp, ep, len);
+ if (print_graft_ack(bp) < 0)
+ goto trunc;
break;
default:
printf(" [type %d]", type);
break;
}
+ return;
+
+trunc:
+ printf("[|dvmrp]");
+ return;
}
-static void
+static int
print_report(register const u_char *bp, register const u_char *ep,
register u_int len)
{
register u_int32_t mask, origin;
- register int metric, i, width, done;
+ register int metric, done;
+ register u_int i, width;
while (len > 0) {
if (len < 3) {
printf(" [|]");
- return;
+ return (0);
}
+ TCHECK2(bp[0], 3);
mask = (u_int32_t)0xff << 24 | bp[0] << 16 | bp[1] << 8 | bp[2];
width = 1;
if (bp[0])
do {
if (bp + width + 1 > ep) {
printf(" [|]");
- return;
+ return (0);
}
if (len < width + 1) {
printf("\n\t [Truncated Report]");
- return;
+ return (0);
}
origin = 0;
- for (i = 0; i < width; ++i)
+ for (i = 0; i < width; ++i) {
+ TCHECK(*bp);
origin = origin << 8 | *bp++;
+ }
for ( ; i < 4; ++i)
origin <<= 8;
+ TCHECK(*bp);
metric = *bp++;
done = metric & 0x80;
metric &= 0x7f;
len -= width + 1;
} while (!done);
}
+ return (0);
+trunc:
+ return (-1);
}
-#define GET_ADDR(to) (memcpy((char *)to, (char *)bp, 4), bp += 4)
-
-static void
+static int
print_probe(register const u_char *bp, register const u_char *ep,
register u_int len)
{
register u_int32_t genid;
- u_char neighbor[4];
+ TCHECK2(bp[0], 4);
if ((len < 4) || ((bp + 4) > ep)) {
/* { (ctags) */
printf(" [|}");
- return;
+ return (0);
}
genid = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3];
bp += 4;
len -= 4;
- printf("\n\tgenid %u", genid);
+ if (vflag > 1)
+ printf("\n\t");
+ else
+ printf(" ");
+ printf("genid %u", genid);
+ if (vflag < 2)
+ return (0);
while ((len > 0) && (bp < ep)) {
- if ((len < 4) || ((bp + 4) > ep)) {
- printf(" [|]");
- return;
- }
- GET_ADDR(neighbor);
- len -= 4;
- printf("\n\tneighbor %s", ipaddr_string(neighbor));
+ TCHECK2(bp[0], 4);
+ printf("\n\tneighbor %s", ipaddr_string(bp));
+ bp += 4; len -= 4;
}
+ return (0);
+trunc:
+ return (-1);
}
-static void
+static int
print_neighbors(register const u_char *bp, register const u_char *ep,
register u_int len)
{
- u_char laddr[4], neighbor[4];
+ const u_char *laddr;
register u_char metric;
register u_char thresh;
register int ncount;
while (len > 0 && bp < ep) {
- if (len < 7 || (bp + 7) >= ep) {
- printf(" [|]");
- return;
- }
- GET_ADDR(laddr);
+ TCHECK2(bp[0], 7);
+ laddr = bp;
+ bp += 4;
metric = *bp++;
thresh = *bp++;
ncount = *bp++;
len -= 7;
- while (--ncount >= 0 && (len >= 4) && (bp + 4) < ep) {
- GET_ADDR(neighbor);
+ while (--ncount >= 0) {
+ TCHECK2(bp[0], 4);
printf(" [%s ->", ipaddr_string(laddr));
printf(" %s, (%d/%d)]",
- ipaddr_string(neighbor), metric, thresh);
+ ipaddr_string(bp), metric, thresh);
+ bp += 4;
len -= 4;
}
}
+ return (0);
+trunc:
+ return (-1);
}
-static void
+static int
print_neighbors2(register const u_char *bp, register const u_char *ep,
register u_int len)
{
- u_char laddr[4], neighbor[4];
+ const u_char *laddr;
register u_char metric, thresh, flags;
register int ncount;
(int)(target_level >> 8) & 0xff);
while (len > 0 && bp < ep) {
- if (len < 8 || (bp + 8) >= ep) {
- printf(" [|]");
- return;
- }
- GET_ADDR(laddr);
+ TCHECK2(bp[0], 8);
+ laddr = bp;
+ bp += 4;
metric = *bp++;
thresh = *bp++;
flags = *bp++;
ncount = *bp++;
len -= 8;
while (--ncount >= 0 && (len >= 4) && (bp + 4) <= ep) {
- GET_ADDR(neighbor);
printf(" [%s -> ", ipaddr_string(laddr));
- printf("%s (%d/%d", ipaddr_string(neighbor),
+ printf("%s (%d/%d", ipaddr_string(bp),
metric, thresh);
if (flags & DVMRP_NF_TUNNEL)
printf("/tunnel");
if (flags & DVMRP_NF_DOWN)
printf("/down");
printf(")]");
+ bp += 4;
len -= 4;
}
if (ncount != -1) {
printf(" [|]");
- return;
+ return (0);
}
}
+ return (0);
+trunc:
+ return (-1);
}
-static void
-print_prune(register const u_char *bp, register const u_char *ep,
- register u_int len)
+static int
+print_prune(register const u_char *bp)
{
- union a {
- u_char b[4];
- u_int32_t i;
- } prune_timer;
-
- if (len < 12 || (bp + 12) > ep) {
- printf(" [|]");
- return;
- }
+ TCHECK2(bp[0], 12);
printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
bp += 8;
- GET_ADDR(prune_timer.b);
- printf(" timer %d", (int)ntohl(prune_timer.i));
+ (void)printf(" timer ");
+ relts_print(EXTRACT_32BITS(bp));
+ return (0);
+trunc:
+ return (-1);
}
-static void
-print_graft(register const u_char *bp, register const u_char *ep,
- register u_int len)
+static int
+print_graft(register const u_char *bp)
{
-
- if (len < 8 || (bp + 8) > ep) {
- printf(" [|]");
- return;
- }
+ TCHECK2(bp[0], 8);
printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
+ return (0);
+trunc:
+ return (-1);
}
-static void
-print_graft_ack(register const u_char *bp, register const u_char *ep,
- register u_int len)
+static int
+print_graft_ack(register const u_char *bp)
{
-
- if (len < 8 || (bp + 8) > ep) {
- printf(" [|]");
- return;
- }
+ TCHECK2(bp[0], 8);
printf(" src %s grp %s", ipaddr_string(bp), ipaddr_string(bp + 4));
+ return (0);
+trunc:
+ return (-1);
}
projects / tcpdump / blobdiff