#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.84 2001-02-03 05:04:49 itojun Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.98 2002-08-01 08:53:31 risso Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <sys/param.h>
-#include <sys/time.h>
+#include <tcpdump-stdinc.h>
#include <rpc/rpc.h>
-#include <netinet/in.h>
-
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <ctype.h>
-#include <unistd.h>
#include "interface.h"
#include "addrtoname.h"
#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
-#define BXXP_PORT 10288
+#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));
+ if (IP_HL(ip) == 5)
+ memcpy(&phu.ph.dst, &ip->ip_dst.s_addr, sizeof(u_int32_t));
+ else
+ phu.ph.dst = ip_finddst(ip);
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 u_int8_t *)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
sport = ntohs(tp->th_sport);
dport = ntohs(tp->th_dport);
-
hlen = TH_OFF(tp) * 4;
/*
} 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;
}
}
if (IP_V(ip) == 4 && vflag && !fragmented) {
- int sum;
+ u_int16_t sum, tcp_sum;
if (TTEST2(tp->th_sport, length)) {
sum = tcp_cksum(ip, tp, length);
- if (sum != 0)
- (void)printf(" [bad tcp cksum %x!]", sum);
- else
+ if (sum != 0) {
+ tcp_sum = ntohs(tp->th_sum);
+ (void)printf(" [bad tcp cksum %x (->%x)!]",
+ tcp_sum, in_cksum_shouldbe(tcp_sum, sum));
+ } else
(void)printf(" [tcp sum ok]");
}
}
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);
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);
- else if (sport == BXXP_PORT || dport == BXXP_PORT)
- bxxp_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 */
+ /*
+ * 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;
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