summaryrefslogtreecommitdiffstats
path: root/contrib/tcpdump/print-rip.c
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/tcpdump/print-rip.c')
-rw-r--r--contrib/tcpdump/print-rip.c257
1 files changed, 257 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-rip.c b/contrib/tcpdump/print-rip.c
new file mode 100644
index 0000000..27446a6
--- /dev/null
+++ b/contrib/tcpdump/print-rip.c
@@ -0,0 +1,257 @@
+/*
+ * Copyright (c) 1989, 1990, 1991, 1993, 1994, 1996
+ * 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: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.59 2006-03-23 14:58:44 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h" /* must come after interface.h */
+
+#include "af.h"
+
+struct rip {
+ u_int8_t rip_cmd; /* request/response */
+ u_int8_t rip_vers; /* protocol version # */
+ u_int8_t unused[2]; /* unused */
+};
+
+#define RIPCMD_REQUEST 1 /* want info */
+#define RIPCMD_RESPONSE 2 /* responding to request */
+#define RIPCMD_TRACEON 3 /* turn tracing on */
+#define RIPCMD_TRACEOFF 4 /* turn it off */
+#define RIPCMD_POLL 5 /* want info from everybody */
+#define RIPCMD_POLLENTRY 6 /* poll for entry */
+
+static const struct tok rip_cmd_values[] = {
+ { RIPCMD_REQUEST, "Request" },
+ { RIPCMD_RESPONSE, "Response" },
+ { RIPCMD_TRACEON, "Trace on" },
+ { RIPCMD_TRACEOFF, "Trace off" },
+ { RIPCMD_POLL, "Poll" },
+ { RIPCMD_POLLENTRY, "Poll Entry" },
+ { 0, NULL}
+};
+
+#define RIP_AUTHLEN 16
+#define RIP_ROUTELEN 20
+
+/*
+ * rfc 1723
+ *
+ * 0 1 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * | Command (1) | Version (1) | unused |
+ * +---------------+---------------+-------------------------------+
+ * | Address Family Identifier (2) | Route Tag (2) |
+ * +-------------------------------+-------------------------------+
+ * | IP Address (4) |
+ * +---------------------------------------------------------------+
+ * | Subnet Mask (4) |
+ * +---------------------------------------------------------------+
+ * | Next Hop (4) |
+ * +---------------------------------------------------------------+
+ * | Metric (4) |
+ * +---------------------------------------------------------------+
+ *
+ */
+
+struct rip_netinfo {
+ u_int16_t rip_family;
+ u_int16_t rip_tag;
+ u_int32_t rip_dest;
+ u_int32_t rip_dest_mask;
+ u_int32_t rip_router;
+ u_int32_t rip_metric; /* cost of route */
+};
+
+static void
+rip_entry_print_v1(register const struct rip_netinfo *ni)
+{
+ register u_short family;
+
+ /* RFC 1058 */
+ family = EXTRACT_16BITS(&ni->rip_family);
+ if (family != BSD_AFNUM_INET) {
+ printf("\n\t AFI %s, ", tok2str(bsd_af_values, "Unknown (%u)", family));
+ print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
+ return;
+ }
+ if (EXTRACT_16BITS(&ni->rip_tag) ||
+ EXTRACT_32BITS(&ni->rip_dest_mask) ||
+ EXTRACT_32BITS(&ni->rip_router)) {
+ /* MBZ fields not zero */
+ print_unknown_data((u_int8_t *)&ni->rip_family,"\n\t ",RIP_ROUTELEN);
+ return;
+ } /* BSD_AFNUM_INET */
+ printf("\n\t %s, metric: %u",
+ ipaddr_string(&ni->rip_dest),
+ EXTRACT_32BITS(&ni->rip_metric));
+}
+
+static void
+rip_entry_print_v2(register const struct rip_netinfo *ni)
+{
+ register u_char *p;
+ register u_short family;
+ u_char buf[RIP_AUTHLEN];
+
+ family = EXTRACT_16BITS(&ni->rip_family);
+ if (family == 0xFFFF) { /* 16 bytes authentication ? */
+ if (EXTRACT_16BITS(&ni->rip_tag) == 2) { /* simple text authentication ? */
+ memcpy(buf, &ni->rip_dest, sizeof(buf));
+ buf[sizeof(buf)-1] = '\0';
+ for (p = buf; *p; p++) {
+ if (!isprint(*p))
+ break;
+ }
+ printf("\n\t Simple Text Authentication data: %s", buf);
+ } else {
+ printf("\n\t Unknown (%u) Authentication data:",
+ EXTRACT_16BITS(&ni->rip_tag));
+ print_unknown_data((u_int8_t *)&ni->rip_dest,"\n\t ",RIP_AUTHLEN);
+ }
+ } else if (family != BSD_AFNUM_INET) {
+ printf("\n\t AFI %s", tok2str(bsd_af_values, "Unknown (%u)", family));
+ print_unknown_data((u_int8_t *)&ni->rip_tag,"\n\t ",RIP_ROUTELEN-2);
+ return;
+ } else { /* BSD_AFNUM_INET */
+ printf("\n\t AFI %s, %15s/%-2d, tag 0x%04x, metric: %u, next-hop: ",
+ tok2str(bsd_af_values, "Unknown (%u)", family),
+ ipaddr_string(&ni->rip_dest),
+ mask2plen(EXTRACT_32BITS(&ni->rip_dest_mask)),
+ EXTRACT_16BITS(&ni->rip_tag),
+ EXTRACT_32BITS(&ni->rip_metric));
+ if (EXTRACT_32BITS(&ni->rip_router))
+ printf("%s", ipaddr_string(&ni->rip_router));
+ else
+ printf("self");
+ }
+}
+
+void
+rip_print(const u_char *dat, u_int length)
+{
+ register const struct rip *rp;
+ register const struct rip_netinfo *ni;
+ register u_int i, j;
+ register int trunc;
+
+ if (snapend < dat) {
+ printf(" [|rip]");
+ return;
+ }
+ i = snapend - dat;
+ if (i > length)
+ i = length;
+ if (i < sizeof(*rp)) {
+ printf(" [|rip]");
+ return;
+ }
+ i -= sizeof(*rp);
+
+ rp = (struct rip *)dat;
+
+ printf("%sRIPv%u",
+ (vflag >= 1) ? "\n\t" : "",
+ rp->rip_vers);
+
+ switch (rp->rip_vers) {
+ case 0:
+ /*
+ * RFC 1058.
+ *
+ * XXX - RFC 1058 says
+ *
+ * 0 Datagrams whose version number is zero are to be ignored.
+ * These are from a previous version of the protocol, whose
+ * packet format was machine-specific.
+ *
+ * so perhaps we should just dump the packet, in hex.
+ */
+ print_unknown_data((u_int8_t *)&rp->rip_cmd,"\n\t",length);
+ break;
+ default:
+ /* dump version and lets see if we know the commands name*/
+ printf(", %s, length: %u",
+ tok2str(rip_cmd_values,
+ "unknown command (%u)",
+ rp->rip_cmd),
+ length);
+
+ if (vflag < 1)
+ return;
+
+ switch (rp->rip_cmd) {
+ case RIPCMD_RESPONSE:
+ j = length / sizeof(*ni);
+ printf(", routes: %u",j);
+ trunc = (i / sizeof(*ni)) != j;
+ ni = (struct rip_netinfo *)(rp + 1);
+ for (; i >= sizeof(*ni); ++ni) {
+ if (rp->rip_vers == 1)
+ rip_entry_print_v1(ni);
+ else if (rp->rip_vers == 2)
+ rip_entry_print_v2(ni);
+ else
+ break;
+ i -= sizeof(*ni);
+ }
+ if (trunc)
+ printf("[|rip]");
+ break;
+
+ case RIPCMD_REQUEST:
+ case RIPCMD_TRACEOFF:
+ case RIPCMD_POLL:
+ case RIPCMD_POLLENTRY:
+ break;
+
+ case RIPCMD_TRACEON:
+ /* fall through */
+ default:
+ if (vflag <= 1) {
+ if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
+ return;
+ }
+ break;
+ }
+ /* do we want to see an additionally hexdump ? */
+ if (vflag> 1) {
+ if(!print_unknown_data((u_int8_t *)rp,"\n\t",length))
+ return;
+ }
+ }
+}
+
+
OpenPOWER on IntegriCloud