#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.80 2000-01-25 01:03:23 fenner Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-ip.c,v 1.104 2002-05-29 09:47:04 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include <sys/socket.h>
#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>
-
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#endif
+
+#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "interface.h"
#include "extract.h" /* must come after interface.h */
+#include "ip.h"
+
/* Compatibility */
#ifndef IPPROTO_ND
#define IPPROTO_ND 77
#endif
-#ifndef IN_CLASSD
-#define IN_CLASSD(i) (((int32_t)(i) & 0xf0000000) == 0xe0000000)
-#endif
-
-/* (following from ipmulti/mrouted/prune.h) */
-
-/*
- * The packet format for a traceroute request.
- */
-struct tr_query {
- u_int tr_src; /* traceroute source */
- u_int tr_dst; /* traceroute destination */
- u_int tr_raddr; /* traceroute response address */
- u_int tr_rttlqid; /* response ttl and qid */
-};
-
-#define TR_GETTTL(x) (int)(((x) >> 24) & 0xff)
-#define TR_GETQID(x) ((x) & 0x00ffffff)
-
-/*
- * Traceroute response format. A traceroute response has a tr_query at the
- * beginning, followed by one tr_resp for each hop taken.
- */
-struct tr_resp {
- u_int tr_qarr; /* query arrival time */
- u_int tr_inaddr; /* incoming interface address */
- u_int tr_outaddr; /* outgoing interface address */
- u_int tr_rmtaddr; /* parent address in source tree */
- u_int tr_vifin; /* input packet count on interface */
- u_int tr_vifout; /* output packet count on interface */
- u_int tr_pktcnt; /* total incoming packets for src-grp */
- u_char tr_rproto; /* routing proto deployed on router */
- u_char tr_fttl; /* ttl required to forward on outvif */
- u_char tr_smask; /* subnet mask for src addr */
- u_char tr_rflags; /* forwarding error codes */
-};
-
-/* defs within mtrace */
-#define TR_QUERY 1
-#define TR_RESP 2
-
-/* fields for tr_rflags (forwarding error codes) */
-#define TR_NO_ERR 0
-#define TR_WRONG_IF 1
-#define TR_PRUNED 2
-#define TR_OPRUNED 3
-#define TR_SCOPED 4
-#define TR_NO_RTE 5
-#define TR_NO_FWD 7
-#define TR_NO_SPACE 0x81
-#define TR_OLD_ROUTER 0x82
-
-/* fields for tr_rproto (routing protocol) */
-#define TR_PROTO_DVMRP 1
-#define TR_PROTO_MOSPF 2
-#define TR_PROTO_PIM 3
-#define TR_PROTO_CBT 4
-
-static void print_mtrace(register const u_char *bp, register u_int len)
-{
- register struct tr_query *tr = (struct tr_query *)(bp + 8);
-
- printf("mtrace %lu: %s to %s reply-to %s",
- (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
- ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
- ipaddr_string(&tr->tr_raddr));
- if (IN_CLASSD(ntohl(tr->tr_raddr)))
- printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
-}
-
-static void print_mresp(register const u_char *bp, register u_int len)
-{
- register struct tr_query *tr = (struct tr_query *)(bp + 8);
-
- printf("mresp %lu: %s to %s reply-to %s",
- (u_long)TR_GETQID(ntohl(tr->tr_rttlqid)),
- ipaddr_string(&tr->tr_src), ipaddr_string(&tr->tr_dst),
- ipaddr_string(&tr->tr_raddr));
- if (IN_CLASSD(ntohl(tr->tr_raddr)))
- printf(" with-ttl %d", TR_GETTTL(ntohl(tr->tr_rttlqid)));
-}
-
-static void
-igmp_print(register const u_char *bp, register u_int len,
- register const u_char *bp2)
-{
- register const struct ip *ip;
-
- ip = (const struct ip *)bp2;
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
-
- if (qflag) {
- (void)printf("igmp");
- return;
- }
-
- TCHECK2(bp[0], 8);
- switch (bp[0]) {
- case 0x11:
- (void)printf("igmp query");
- if (EXTRACT_32BITS(&bp[4]))
- (void)printf(" [gaddr %s]", ipaddr_string(&bp[4]));
- if (len != 8)
- (void)printf(" [len %d]", len);
- break;
- case 0x12:
- (void)printf("igmp v1 report %s", ipaddr_string(&bp[4]));
- if (len != 8)
- (void)printf(" [len %d]", len);
- break;
- case 0x16:
- (void)printf("igmp v2 report %s", ipaddr_string(&bp[4]));
- break;
- case 0x17:
- (void)printf("igmp leave %s", ipaddr_string(&bp[4]));
- break;
- case 0x13:
- (void)printf("igmp dvmrp");
- if (len < 8)
- (void)printf(" [len %d]", len);
- else
- dvmrp_print(bp, len);
- break;
- case 0x14:
- (void)printf("igmp pimv1");
- pimv1_print(bp, len);
- break;
- case 0x1e:
- print_mresp(bp, len);
- break;
- case 0x1f:
- print_mtrace(bp, len);
- break;
- default:
- (void)printf("igmp-%d", bp[0]);
- break;
- }
-
- if (vflag && TTEST2(bp[0], len)) {
- /* Check the IGMP checksum */
- if (in_cksum((const u_short*)bp, len, 0))
- printf(" bad igmp cksum %x!", EXTRACT_16BITS(&bp[2]));
- }
- return;
-trunc:
- fputs("[|igmp]", stdout);
-}
-
/*
* print the recorded route in an IP RR, LSRR or SSRR option.
*/
for (; length > 0; cp += len, length -= len) {
int tt = *cp;
- len = (tt == IPOPT_NOP || tt == IPOPT_EOL) ? 1 : cp[1];
+ if (tt == IPOPT_NOP || tt == IPOPT_EOL)
+ len = 1;
+ else {
+ if (&cp[1] >= snapend) {
+ printf("[|ip]");
+ return;
+ }
+ len = cp[1];
+ }
if (len <= 0) {
printf("[|ip op len %d]", len);
return;
printf("{%d}", len);
else if (cp[2] || cp[3])
printf("%d.%d", cp[2], cp[3]);
- break;
+ break;
default:
printf(" IPOPT-%d{%d}", cp[0], len);
* don't modifiy the packet.
*/
u_short
-in_cksum(const u_short *addr, register int len, u_short csum)
+in_cksum(const u_short *addr, register u_int len, int csum)
{
int nleft = len;
const u_short *w = addr;
register const u_char *cp;
u_char nh;
int advance;
+ struct protoent *proto;
ip = (const struct ip *)bp;
#ifdef LBL_ALIGN
/*
* If the IP header is not aligned, copy into abuf.
- * This will never happen with BPF. It does happen raw packet
- * dumps from -r.
*/
if ((long)ip & 3) {
static u_char *abuf = NULL;
(void)printf("truncated-ip %d", length);
return;
}
- hlen = ip->ip_hl * 4;
+ hlen = IP_HL(ip) * 4;
if (hlen < sizeof (struct ip)) {
(void)printf("bad-hlen %d", hlen);
return;
len = ntohs(ip->ip_len);
if (length < len)
- (void)printf("truncated-ip - %d bytes missing!",
+ (void)printf("truncated-ip - %d bytes missing! ",
len - length);
len -= hlen;
len0 = len;
cp = (const u_char *)ip + hlen;
nh = ip->ip_p;
- if (nh != IPPROTO_TCP && nh != IPPROTO_UDP) {
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP 132
+#endif
+ if (nh != IPPROTO_TCP && nh != IPPROTO_UDP &&
+ nh != IPPROTO_SCTP) {
(void)printf("%s > %s: ", ipaddr_string(&ip->ip_src),
ipaddr_string(&ip->ip_dst));
}
#endif
case IPPROTO_ESP:
{
- int enh;
- advance = esp_print(cp, (const u_char *)ip, &enh);
+ int enh, padlen;
+ advance = esp_print(cp, (const u_char *)ip, &enh, &padlen);
cp += advance;
- len -= advance;
+ len -= advance + padlen;
if (enh < 0)
break;
nh = enh & 0xff;
goto again;
}
+ case IPPROTO_SCTP:
+ sctp_print(cp, (const u_char *)ip, len);
+ break;
+
case IPPROTO_TCP:
- tcp_print(cp, len, (const u_char *)ip);
+ tcp_print(cp, len, (const u_char *)ip, (off &~ 0x6000));
break;
case IPPROTO_UDP:
- udp_print(cp, len, (const u_char *)ip);
+ udp_print(cp, len, (const u_char *)ip, (off &~ 0x6000));
break;
case IPPROTO_ICMP:
break;
case IPPROTO_ND:
-#if 0
- (void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
-#endif
(void)printf(" nd %d", len);
break;
#define IPPROTO_IGMP 2
#endif
case IPPROTO_IGMP:
- igmp_print(cp, len, (const u_char *)ip);
+ igmp_print(cp, len);
break;
case 4:
/* DVMRP multicast tunnel (ip-in-ip encapsulation) */
-#if 0
- if (vflag)
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
-#endif
ip_print(cp, len);
if (! vflag) {
- printf(" (ipip)");
+ printf(" (ipip-proto-4)");
return;
}
break;
#endif
case IP6PROTO_ENCAP:
/* ip6-in-ip encapsulation */
-#if 0
- if (vflag)
- (void)printf("%s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
-#endif
ip6_print(cp, len);
- if (! vflag) {
- printf(" (encap)");
- return;
- }
break;
#endif /*INET6*/
#define IPPROTO_GRE 47
#endif
case IPPROTO_GRE:
- if (vflag)
- (void)printf("gre %s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
/* do it */
gre_print(cp, len);
- if (! vflag) {
- printf(" (gre encap)");
- return;
- }
- break;
+ break;
#ifndef IPPROTO_MOBILE
#define IPPROTO_MOBILE 55
#endif
case IPPROTO_MOBILE:
- if (vflag)
- (void)printf("mobile %s > %s: ",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
mobile_print(cp, len);
- if (! vflag) {
- printf(" (mobile encap)");
- return;
- }
break;
#ifndef IPPROTO_PIM
pim_print(cp, len);
break;
- default:
-#if 0
- (void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
+#ifndef IPPROTO_VRRP
+#define IPPROTO_VRRP 112
#endif
- (void)printf(" ip-proto-%d %d", nh, len);
+ case IPPROTO_VRRP:
+ vrrp_print(cp, len, ip->ip_ttl);
+ break;
+
+ default:
+ if ((proto = getprotobynumber(nh)) != NULL)
+ (void)printf(" %s", proto->p_name);
+ else
+ (void)printf(" ip-proto-%d", nh);
+ printf(" %d", len);
break;
}
}
if (off & 0x3fff) {
/*
* if this isn't the first frag, we're missing the
- * next level protocol header. print the ip addr.
+ * next level protocol header. print the ip addr
+ * and the protocol.
*/
- if (off & 0x1fff)
+ if (off & 0x1fff) {
(void)printf("%s > %s:", ipaddr_string(&ip->ip_src),
ipaddr_string(&ip->ip_dst));
+ if ((proto = getprotobynumber(ip->ip_p)) != NULL)
+ (void)printf(" %s", proto->p_name);
+ else
+ (void)printf(" ip-proto-%d", ip->ip_p);
+ }
#ifndef IP_MF
#define IP_MF 0x2000
#endif /* IP_MF */
if (ip->ip_tos) {
(void)printf(" [tos 0x%x", (int)ip->ip_tos);
/* ECN bits */
- if (ip->ip_tos&0x02) {
- (void)printf(",ECT");
- if (ip->ip_tos&0x01)
+ if (ip->ip_tos & 0x03) {
+ switch (ip->ip_tos & 0x03) {
+ case 1:
+ (void)printf(",ECT(1)");
+ break;
+ case 2:
+ (void)printf(",ECT(0)");
+ break;
+ case 3:
(void)printf(",CE");
+ }
}
(void)printf("] ");
}
(void)printf("%sid %d", sep, (int)ntohs(ip->ip_id));
sep = ", ";
}
+ (void)printf("%slen %d", sep, (int)ntohs(ip->ip_len));
+ sep = ", ";
if ((u_char *)ip + hlen <= snapend) {
sum = in_cksum((const u_short *)ip, hlen, 0);
if (sum != 0) {
- (void)printf("%sbad cksum %x!", sep,
- ntohs(ip->ip_sum));
+ (void)printf("%sbad cksum %x (->%x)!", sep,
+ ntohs(ip->ip_sum),
+ ntohs(ip->ip_sum)-sum);
sep = ", ";
}
}
printf(")");
}
}
+
+void
+ipN_print(register const u_char *bp, register u_int length)
+{
+ struct ip *ip, hdr;
+
+ ip = (struct ip *)bp;
+ if (length < 4) {
+ (void)printf("truncated-ip %d", length);
+ return;
+ }
+ memcpy (&hdr, (char *)ip, 4);
+ switch (IP_V(&hdr)) {
+ case 4:
+ ip_print (bp, length);
+ return;
+#ifdef INET6
+ case 6:
+ ip6_print (bp, length);
+ return;
+#endif
+ default:
+ (void)printf("unknown ip %d", IP_V(&hdr));
+ return;
+ }
+}
projects / tcpdump / blobdiff