#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.73 2000-09-23 08:26:38 guy Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.95 2001-12-10 08:21:24 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include <rpc/rpc.h>
#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
-#ifdef INET6
-#include <netinet/ip6.h>
-#endif
-
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "tcp.h"
+#include "ip.h"
+#ifdef INET6
+#include "ip6.h"
+#endif
+
+#include "nameser.h"
+
static void print_tcp_rst_data(register const u_char *sp, u_int length);
#define MAX_RST_DATA_LEN 30
-/* Compatibility */
-#ifndef TCPOPT_WSCALE
-#define TCPOPT_WSCALE 3 /* window scale factor (rfc1072) */
-#endif
-#ifndef TCPOPT_SACKOK
-#define TCPOPT_SACKOK 4 /* selective ack ok (rfc1072) */
-#endif
-#ifndef TCPOPT_SACK
-#define TCPOPT_SACK 5 /* selective ack (rfc1072) */
-#endif
-#ifndef TCPOPT_ECHO
-#define TCPOPT_ECHO 6 /* echo (rfc1072) */
-#endif
-#ifndef TCPOPT_ECHOREPLY
-#define TCPOPT_ECHOREPLY 7 /* echo (rfc1072) */
-#endif
-#ifndef TCPOPT_TIMESTAMP
-#define TCPOPT_TIMESTAMP 8 /* timestamps (rfc1323) */
-#endif
-#ifndef TCPOPT_CC
-#define TCPOPT_CC 11 /* T/TCP CC options (rfc1644) */
-#endif
-#ifndef TCPOPT_CCNEW
-#define TCPOPT_CCNEW 12 /* T/TCP CC options (rfc1644) */
-#endif
-#ifndef TCPOPT_CCECHO
-#define TCPOPT_CCECHO 13 /* T/TCP CC options (rfc1644) */
-#endif
-
-/*
- * Definitions required for ECN
- * for use if the OS running tcpdump does not have ECN
- */
-#ifndef TH_ECNECHO
-#define TH_ECNECHO 0x40 /* ECN Echo in tcp header */
-#endif
-#ifndef TH_CWR
-#define TH_CWR 0x80 /* ECN Cwnd Reduced in tcp header*/
-#endif
struct tha {
#ifndef INET6
#define BGP_PORT 179
#endif
#define NETBIOS_SSN_PORT 139
+#ifndef PPTP_PORT
+#define PPTP_PORT 1723
+#endif
+#define BEEP_PORT 10288
#ifndef NFS_PORT
#define NFS_PORT 2049
#endif
+#define MSDP_PORT 639
static int tcp_cksum(register const struct ip *ip,
register const struct tcphdr *tp,
register int len)
{
- int i, tlen;
union phu {
struct phdr {
u_int32_t src;
} ph;
u_int16_t pa[6];
} phu;
- register const u_int16_t *sp;
- u_int32_t sum;
- tlen = ntohs(ip->ip_len) - ((const char *)tp-(const char*)ip);
+ const u_int16_t *sp;
/* pseudo-header.. */
- phu.ph.len = htons(tlen);
+ phu.ph.len = htons(len); /* XXX */
phu.ph.mbz = 0;
phu.ph.proto = IPPROTO_TCP;
memcpy(&phu.ph.src, &ip->ip_src.s_addr, sizeof(u_int32_t));
memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
sp = &phu.pa[0];
- sum = sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5];
-
- sp = (const u_int16_t *)tp;
-
- for (i=0; i<(tlen&~1); i+= 2)
- sum += *sp++;
-
- if (tlen & 1) {
- sum += htons( (*(const char *)sp) << 8);
- }
-
- while (sum > 0xffff)
- sum = (sum & 0xffff) + (sum >> 16);
- sum = ~sum & 0xffff;
-
- return (sum);
+ return in_cksum((u_short *)tp, len,
+ sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5]);
}
#ifdef INET6
sum += *sp++;
if (tlen & 1)
- sum += htons((*(const char *)sp) << 8);
+ sum += htons((*(const u_int8_t *)sp) << 8);
while (sum > 0xffff)
sum = (sum & 0xffff) + (sum >> 16);
void
tcp_print(register const u_char *bp, register u_int length,
- register const u_char *bp2)
+ register const u_char *bp2, int fragmented)
{
register const struct tcphdr *tp;
register const struct ip *ip;
tp = (struct tcphdr *)bp;
ip = (struct ip *)bp2;
#ifdef INET6
- if (ip->ip_v == 6)
+ if (IP_V(ip) == 6)
ip6 = (struct ip6_hdr *)bp2;
else
ip6 = NULL;
sport = ntohs(tp->th_sport);
dport = ntohs(tp->th_dport);
-
- hlen = tp->th_off * 4;
+ hlen = TH_OFF(tp) * 4;
/*
* If data present and NFS port used, assume NFS.
if (!qflag) {
if ((u_char *)tp + 4 + sizeof(struct rpc_msg) <= snapend &&
dport == NFS_PORT) {
- nfsreq_print((u_char *)tp + hlen + 4, length-hlen,
+ nfsreq_print((u_char *)tp + hlen + 4, length - hlen,
(u_char *)ip);
return;
} else if ((u_char *)tp + 4 + sizeof(struct rpc_msg)
<= snapend &&
sport == NFS_PORT) {
- nfsreply_print((u_char *)tp + hlen + 4,length-hlen,
+ nfsreply_print((u_char *)tp + hlen + 4, length - hlen,
(u_char *)ip);
return;
}
urp = ntohs(tp->th_urp);
if (qflag) {
- (void)printf("tcp %d", length - tp->th_off * 4);
+ (void)printf("tcp %d", length - TH_OFF(tp) * 4);
return;
}
if ((flags = tp->th_flags) & (TH_SYN|TH_FIN|TH_RST|TH_PUSH|
memset(&tha, 0, sizeof(tha));
rev = 0;
if (ip6) {
- if (sport > dport) {
+ if (sport > dport)
rev = 1;
- } else if (sport == dport) {
- int i;
-
- for (i = 0; i < 4; i++) {
- if (((u_int32_t *)(&ip6->ip6_src))[i] >
- ((u_int32_t *)(&ip6->ip6_dst))[i]) {
- rev = 1;
- break;
+ else if (sport == dport) {
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ if (((u_int32_t *)(&ip6->ip6_src))[i] >
+ ((u_int32_t *)(&ip6->ip6_dst))[i]) {
+ rev = 1;
+ break;
+ }
}
- }
}
if (rev) {
tha.src = ip6->ip6_dst;
th->ack = seq, th->seq = ack - 1;
else
th->seq = seq, th->ack = ack - 1;
-
} else {
if (rev)
seq -= th->ack, ack -= th->seq;
return;
}
- if (ip->ip_v == 4 && vflag) {
+ if (IP_V(ip) == 4 && vflag && !fragmented) {
int sum;
if (TTEST2(tp->th_sport, length)) {
sum = tcp_cksum(ip, tp, length);
}
}
#ifdef INET6
- if (ip->ip_v == 6 && ip6->ip6_plen && vflag) {
+ if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !fragmented) {
int sum;
if (TTEST2(tp->th_sport, length)) {
sum = tcp6_cksum(ip6, tp, length);
length -= hlen;
if (vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST))
- (void)printf(" %u:%u(%d)", seq, seq + length, length);
+ (void)printf(" %u:%u(%u)", seq, seq + length, length);
if (flags & TH_ACK)
(void)printf(" ack %u", ack);
/*
* Decode payload if necessary.
*/
- bp += (tp->th_off * 4);
+ bp += TH_OFF(tp) * 4;
if (flags & TH_RST) {
if (vflag)
print_tcp_rst_data(bp, length);
telnet_print(bp, length);
} else if (sport == BGP_PORT || dport == BGP_PORT)
bgp_print(bp, length);
+ else if (sport == PPTP_PORT || dport == PPTP_PORT)
+ pptp_print(bp, length);
+#ifdef TCPDUMP_DO_SMB
else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
nbt_tcp_print(bp, length);
+#endif
+ else if (sport == BEEP_PORT || dport == BEEP_PORT)
+ beep_print(bp, length);
+ else if (length > 2 &&
+ (sport == NAMESERVER_PORT || dport == NAMESERVER_PORT)) {
+ /*
+ * TCP DNS query has 2byte length at the head.
+ * XXX packet could be unaligned, it can go strange
+ */
+ ns_print(bp + 2, length - 2);
+ } else if (sport == MSDP_PORT || dport == MSDP_PORT) {
+ msdp_print(bp, length);
+ }
}
return;
bad:
putchar(' ');
while (length-- && sp <= snapend) {
c = *sp++;
- if (isprint(c))
- putchar(c);
- else
- putchar('.');
+ safeputchar(c);
}
putchar(']');
}
projects / tcpdump / blobdiff