* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-rip.c,v 1.37 1999-10-17 21:37:15 mcr Exp $ (LBL)";
-#endif
+/* \summary: Routing Information Protocol (RIP) printer */
-#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/udp.h>
+#include <netdissect-stdinc.h>
#include <stdio.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "extract.h" /* must come after interface.h */
+#include "extract.h"
+
+#include "af.h"
+
+static const char tstr[] = "[|rip]";
struct rip {
- u_char rip_cmd; /* request/response */
- u_char rip_vers; /* protocol version # */
- u_short rip_zero2; /* unused */
+ uint8_t rip_cmd; /* request/response */
+ uint8_t rip_vers; /* protocol version # */
+ uint8_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_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_short rip_family;
- u_short 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 */
+ uint16_t rip_family;
+ uint16_t rip_tag;
+ uint32_t rip_dest;
+ uint32_t rip_dest_mask;
+ uint32_t rip_router;
+ uint32_t rip_metric; /* cost of route */
};
static void
-rip_entry_print(register int vers, register const struct rip_netinfo *ni)
+rip_entry_print_v1(netdissect_options *ndo,
+ register const struct rip_netinfo *ni)
+{
+ register u_short family;
+
+ /* RFC 1058 */
+ family = EXTRACT_16BITS(&ni->rip_family);
+ if (family != BSD_AFNUM_INET && family != 0) {
+ ND_PRINT((ndo, "\n\t AFI %s, ", tok2str(bsd_af_values, "Unknown (%u)", family)));
+ print_unknown_data(ndo, (const uint8_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(ndo, (const uint8_t *)&ni->rip_family, "\n\t ", RIP_ROUTELEN);
+ return;
+ }
+ if (family == 0) {
+ ND_PRINT((ndo, "\n\t AFI 0, %s, metric: %u",
+ ipaddr_string(ndo, &ni->rip_dest),
+ EXTRACT_32BITS(&ni->rip_metric)));
+ return;
+ } /* BSD_AFNUM_INET */
+ ND_PRINT((ndo, "\n\t %s, metric: %u",
+ ipaddr_string(ndo, &ni->rip_dest),
+ EXTRACT_32BITS(&ni->rip_metric)));
+}
+
+static unsigned
+rip_entry_print_v2(netdissect_options *ndo,
+ register const struct rip_netinfo *ni, const unsigned remaining)
{
- register u_char *cp, *ep;
-
- if (EXTRACT_16BITS(&ni->rip_family) != AF_INET) {
-
- printf(" [family %d:", EXTRACT_16BITS(&ni->rip_family));
- cp = (u_char *)&ni->rip_tag;
- ep = (u_char *)&ni->rip_metric + sizeof(ni->rip_metric);
- for (; cp < ep; cp += 2)
- printf(" %04x", EXTRACT_16BITS(cp));
- printf("]");
- } else if (vers < 2) {
- /* RFC 1058 */
- printf(" %s", ipaddr_string(&ni->rip_dest));
- } else {
- /* RFC 1723 */
- printf(" {%s", ipaddr_string(&ni->rip_dest));
- if (ni->rip_dest_mask)
- printf("/%s", ipaddr_string(&ni->rip_dest_mask));
- if (ni->rip_router)
- printf("->%s", ipaddr_string(&ni->rip_router));
- if (ni->rip_tag)
- printf(" tag %04x", EXTRACT_16BITS(&ni->rip_tag));
- printf("}");
+ register u_short family;
+
+ family = EXTRACT_16BITS(&ni->rip_family);
+ if (family == 0xFFFF) { /* variable-sized authentication structures */
+ uint16_t auth_type = EXTRACT_16BITS(&ni->rip_tag);
+ if (auth_type == 2) {
+ register const u_char *p = (const u_char *)&ni->rip_dest;
+ u_int i = 0;
+ ND_PRINT((ndo, "\n\t Simple Text Authentication data: "));
+ for (; i < RIP_AUTHLEN; p++, i++)
+ ND_PRINT((ndo, "%c", ND_ISPRINT(*p) ? *p : '.'));
+ } else if (auth_type == 3) {
+ ND_PRINT((ndo, "\n\t Auth header:"));
+ ND_PRINT((ndo, " Packet Len %u,", EXTRACT_16BITS((const uint8_t *)ni + 4)));
+ ND_PRINT((ndo, " Key-ID %u,", *((const uint8_t *)ni + 6)));
+ ND_PRINT((ndo, " Auth Data Len %u,", *((const uint8_t *)ni + 7)));
+ ND_PRINT((ndo, " SeqNo %u,", EXTRACT_32BITS(&ni->rip_dest_mask)));
+ ND_PRINT((ndo, " MBZ %u,", EXTRACT_32BITS(&ni->rip_router)));
+ ND_PRINT((ndo, " MBZ %u", EXTRACT_32BITS(&ni->rip_metric)));
+ } else if (auth_type == 1) {
+ ND_PRINT((ndo, "\n\t Auth trailer:"));
+ print_unknown_data(ndo, (const uint8_t *)&ni->rip_dest, "\n\t ", remaining);
+ return remaining; /* AT spans till the packet end */
+ } else {
+ ND_PRINT((ndo, "\n\t Unknown (%u) Authentication data:",
+ EXTRACT_16BITS(&ni->rip_tag)));
+ print_unknown_data(ndo, (const uint8_t *)&ni->rip_dest, "\n\t ", remaining);
+ }
+ } else if (family != BSD_AFNUM_INET && family != 0) {
+ ND_PRINT((ndo, "\n\t AFI %s", tok2str(bsd_af_values, "Unknown (%u)", family)));
+ print_unknown_data(ndo, (const uint8_t *)&ni->rip_tag, "\n\t ", RIP_ROUTELEN-2);
+ } else { /* BSD_AFNUM_INET or AFI 0 */
+ ND_PRINT((ndo, "\n\t AFI %s, %15s/%-2d, tag 0x%04x, metric: %u, next-hop: ",
+ tok2str(bsd_af_values, "%u", family),
+ ipaddr_string(ndo, &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))
+ ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ni->rip_router)));
+ else
+ ND_PRINT((ndo, "self"));
}
- printf("(%d)", EXTRACT_32BITS(&ni->rip_metric));
+ return sizeof (*ni);
}
void
-rip_print(const u_char *dat, u_int length)
+rip_print(netdissect_options *ndo,
+ const u_char *dat, u_int length)
{
register const struct rip *rp;
register const struct rip_netinfo *ni;
- register int i, j, trunc;
+ register u_int i, j;
- i = min(length, snapend - dat) - sizeof(*rp);
- if (i < 0)
+ if (ndo->ndo_snapend < dat) {
+ ND_PRINT((ndo, " %s", tstr));
return;
+ }
+ i = ndo->ndo_snapend - dat;
+ if (i > length)
+ i = length;
+ if (i < sizeof(*rp)) {
+ ND_PRINT((ndo, " %s", tstr));
+ return;
+ }
+ i -= sizeof(*rp);
- rp = (struct rip *)dat;
- switch (rp->rip_cmd) {
-
- case RIPCMD_REQUEST:
- printf(" rip-req %d", length);
- break;
-
- case RIPCMD_RESPONSE:
- j = length / sizeof(*ni);
- if (j * sizeof(*ni) != length - 4)
- printf(" rip-resp %d[%d]:", j, length);
- else
- printf(" rip-resp %d:", j);
- trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
- ni = (struct rip_netinfo *)(rp + 1);
- for (; (i -= sizeof(*ni)) >= 0; ++ni)
- rip_entry_print(rp->rip_vers, ni);
- if (trunc)
- printf("[|rip]");
- break;
-
- case RIPCMD_TRACEON:
- printf(" rip-traceon %d: \"", length);
- (void)fn_print((const u_char *)(rp + 1), snapend);
- fputs("\"\n", stdout);
- break;
+ rp = (const struct rip *)dat;
- case RIPCMD_TRACEOFF:
- printf(" rip-traceoff %d", length);
- break;
+ ND_PRINT((ndo, "%sRIPv%u",
+ (ndo->ndo_vflag >= 1) ? "\n\t" : "",
+ rp->rip_vers));
- case RIPCMD_POLL:
- printf(" rip-poll %d", length);
+ 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(ndo, (const uint8_t *)&rp->rip_cmd, "\n\t", length);
break;
+ default:
+ /* dump version and lets see if we know the commands name*/
+ ND_PRINT((ndo, ", %s, length: %u",
+ tok2str(rip_cmd_values,
+ "unknown command (%u)",
+ rp->rip_cmd),
+ length));
- case RIPCMD_POLLENTRY:
- printf(" rip-pollentry %d", length);
- break;
+ if (ndo->ndo_vflag < 1)
+ return;
- default:
- printf(" rip-#%d %d", rp->rip_cmd, length);
- break;
- }
- switch (rp->rip_vers) {
+ switch (rp->rip_cmd) {
+ case RIPCMD_REQUEST:
+ case RIPCMD_RESPONSE:
+ j = length / sizeof(*ni);
+ ND_PRINT((ndo, ", routes: %u%s", j, rp->rip_vers == 2 ? " or less" : ""));
+ ni = (const struct rip_netinfo *)(rp + 1);
+ for (; i >= sizeof(*ni); ++ni) {
+ if (rp->rip_vers == 1)
+ {
+ rip_entry_print_v1(ndo, ni);
+ i -= sizeof(*ni);
+ }
+ else if (rp->rip_vers == 2)
+ i -= rip_entry_print_v2(ndo, ni, i);
+ else
+ break;
+ }
+ if (i)
+ ND_PRINT((ndo, "%s", tstr));
+ break;
- case 1:
- case 2:
- break;
+ case RIPCMD_TRACEOFF:
+ case RIPCMD_POLL:
+ case RIPCMD_POLLENTRY:
+ break;
- default:
- printf(" [vers %d]", rp->rip_vers);
- break;
+ case RIPCMD_TRACEON:
+ /* fall through */
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ if(!print_unknown_data(ndo, (const uint8_t *)rp, "\n\t", length))
+ return;
+ }
+ break;
+ }
+ /* do we want to see an additionally hexdump ? */
+ if (ndo->ndo_vflag> 1) {
+ if(!print_unknown_data(ndo, (const uint8_t *)rp, "\n\t", length))
+ return;
+ }
}
}
+
+
projects / tcpdump / blobdiff