*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-igrp.c,v 1.13 2000-09-23 08:26:34 guy Exp $ (LBL)";
-#endif
+/* \summary: Interior Gateway Routing Protocol (IGRP) printer */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
-#include <sys/param.h>
-#include <sys/types.h> /* concession to AIX */
-#include <sys/socket.h>
+#include "netdissect-stdinc.h"
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
+#include "netdissect.h"
+#include "extract.h"
-#include <errno.h>
-#include <stdio.h>
+/* Cisco IGRP definitions */
-#include "interface.h"
-#include "addrtoname.h"
-#include "igrp.h"
-#include "extract.h" /* must come after interface.h */
+/* IGRP Header */
+
+struct igrphdr {
+ nd_uint8_t ig_vop; /* protocol version number / opcode */
+#define IGRP_V(x) (((x) & 0xf0) >> 4)
+#define IGRP_OP(x) ((x) & 0x0f)
+ nd_uint8_t ig_ed; /* edition number */
+ nd_uint16_t ig_as; /* autonomous system number */
+ nd_uint16_t ig_ni; /* number of subnet in local net */
+ nd_uint16_t ig_ns; /* number of networks in AS */
+ nd_uint16_t ig_nx; /* number of networks outside AS */
+ nd_uint16_t ig_sum; /* checksum of IGRP header & data */
+};
+
+#define IGRP_UPDATE 1
+#define IGRP_REQUEST 2
+
+/* IGRP routing entry */
+
+struct igrprte {
+ nd_byte igr_net[3]; /* 3 significant octets of IP address */
+ nd_uint24_t igr_dly; /* delay in tens of microseconds */
+ nd_uint24_t igr_bw; /* bandwidth in units of 1 kb/s */
+ nd_uint16_t igr_mtu; /* MTU in octets */
+ nd_uint8_t igr_rel; /* percent packets successfully tx/rx */
+ nd_uint8_t igr_ld; /* percent of channel occupied */
+ nd_uint8_t igr_hct; /* hop count */
+};
+
+#define IGRP_RTE_SIZE 14 /* sizeof() is accurate now */
static void
-igrp_entry_print(register struct igrprte *igr, register int is_interior,
- register int is_exterior)
+igrp_entry_print(netdissect_options *ndo, const struct igrprte *igr)
{
- register u_int delay, bandwidth;
+ u_int delay, bandwidth;
u_int metric, mtu;
- if (is_interior)
- printf(" *.%d.%d.%d", igr->igr_net[0],
- igr->igr_net[1], igr->igr_net[2]);
- else if (is_exterior)
- printf(" X%d.%d.%d.0", igr->igr_net[0],
- igr->igr_net[1], igr->igr_net[2]);
- else
- printf(" %d.%d.%d.0", igr->igr_net[0],
- igr->igr_net[1], igr->igr_net[2]);
-
- delay = EXTRACT_24BITS(igr->igr_dly);
- bandwidth = EXTRACT_24BITS(igr->igr_bw);
- metric = bandwidth + delay;
- if (metric > 0xffffff)
- metric = 0xffffff;
- mtu = EXTRACT_16BITS(igr->igr_mtu);
-
- printf(" d=%d b=%d r=%d l=%d M=%d mtu=%d in %d hops",
+ delay = GET_BE_U_3(igr->igr_dly);
+ bandwidth = GET_BE_U_3(igr->igr_bw);
+ metric = ND_MIN(bandwidth + delay, 0xffffff);
+ mtu = GET_BE_U_2(igr->igr_mtu);
+
+ ND_PRINT(" d=%u b=%u r=%u l=%u M=%u mtu=%u in %u hops",
10 * delay, bandwidth == 0 ? 0 : 10000000 / bandwidth,
- igr->igr_rel, igr->igr_ld, metric,
- mtu, igr->igr_hct);
+ GET_U_1(igr->igr_rel), GET_U_1(igr->igr_ld), metric,
+ mtu, GET_U_1(igr->igr_hct));
}
-static struct tok op2str[] = {
+static const struct tok op2str[] = {
{ IGRP_UPDATE, "update" },
{ IGRP_REQUEST, "request" },
{ 0, NULL }
};
void
-igrp_print(register const u_char *bp, u_int length, register const u_char *bp2)
+igrp_print(netdissect_options *ndo, const u_char *bp, u_int length)
{
- register struct igrphdr *hdr;
- register struct ip *ip;
- register u_char *cp;
+ const struct igrphdr *hdr;
+ const u_char *cp;
u_int nint, nsys, next;
+ uint16_t cksum;
- hdr = (struct igrphdr *)bp;
- ip = (struct ip *)bp2;
- cp = (u_char *)(hdr + 1);
- (void)printf("%s > %s: igrp: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
+ ndo->ndo_protocol = "igrp";
+ hdr = (const struct igrphdr *)bp;
+ cp = (const u_char *)(hdr + 1);
+ ND_PRINT("igrp:");
/* Header */
- TCHECK(*hdr);
- nint = EXTRACT_16BITS(&hdr->ig_ni);
- nsys = EXTRACT_16BITS(&hdr->ig_ns);
- next = EXTRACT_16BITS(&hdr->ig_nx);
-
- (void)printf(" %s V%d edit=%d AS=%d (%d/%d/%d)",
- tok2str(op2str, "op-#%d", IGRP_OP(hdr->ig_vop)),
- IGRP_V(hdr->ig_vop),
- hdr->ig_ed,
- EXTRACT_16BITS(&hdr->ig_as),
+ nint = GET_BE_U_2(hdr->ig_ni);
+ nsys = GET_BE_U_2(hdr->ig_ns);
+ next = GET_BE_U_2(hdr->ig_nx);
+
+ ND_PRINT(" %s V%u edit=%u AS=%u (%u/%u/%u)",
+ tok2str(op2str, "op-#%u", IGRP_OP(GET_U_1(hdr->ig_vop))),
+ IGRP_V(GET_U_1(hdr->ig_vop)),
+ GET_U_1(hdr->ig_ed),
+ GET_BE_U_2(hdr->ig_as),
nint,
nsys,
next);
+ cksum = GET_BE_U_2(hdr->ig_sum);
+ if (ndo->ndo_vflag)
+ ND_PRINT(" checksum=0x%04x", cksum);
length -= sizeof(*hdr);
while (length >= IGRP_RTE_SIZE) {
+ const struct igrprte *igr = (const struct igrprte *)cp;
+ uint8_t net0 = GET_U_1(&igr->igr_net[0]);
+ uint8_t net1 = GET_U_1(&igr->igr_net[1]);
+ uint8_t net2 = GET_U_1(&igr->igr_net[2]);
+
if (nint > 0) {
- TCHECK2(*cp, IGRP_RTE_SIZE);
- igrp_entry_print((struct igrprte *)cp, 1, 0);
+ ND_PRINT(" *.%u.%u.%u", net0, net1, net2);
+ igrp_entry_print(ndo, igr);
--nint;
} else if (nsys > 0) {
- TCHECK2(*cp, IGRP_RTE_SIZE);
- igrp_entry_print((struct igrprte *)cp, 0, 0);
+ ND_PRINT(" %u.%u.%u.0", net0, net1, net2);
+ igrp_entry_print(ndo, igr);
--nsys;
} else if (next > 0) {
- TCHECK2(*cp, IGRP_RTE_SIZE);
- igrp_entry_print((struct igrprte *)cp, 0, 1);
+ ND_PRINT(" X%u.%u.%u.0", net0, net1, net2);
+ igrp_entry_print(ndo, igr);
--next;
} else {
- (void)printf("[extra bytes %d]", length);
+ ND_PRINT(" [extra bytes %u]", length);
break;
}
cp += IGRP_RTE_SIZE;
length -= IGRP_RTE_SIZE;
}
- if (nint == 0 && nsys == 0 && next == 0)
- return;
-trunc:
- fputs("[|igrp]", stdout);
+ if (nint || nsys || next || length)
+ nd_print_invalid(ndo);
}
projects / tcpdump / blobdiff