summaryrefslogtreecommitdiff
path: root/print-tcp.c
diff options
context:
space:
mode:
Diffstat (limited to 'print-tcp.c')
-rw-r--r--print-tcp.c766
1 files changed, 435 insertions, 331 deletions
diff --git a/print-tcp.c b/print-tcp.c
index 88b4615..e0d0531 100644
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -23,9 +23,9 @@
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
+/* \summary: TCP printer */
+
#ifndef lint
-static const char rcsid[] _U_ =
-"@(#) $Header: /tcpdump/master/tcpdump/print-tcp.c,v 1.135 2008-11-09 23:35:03 mcr Exp $ (LBL)";
#else
__RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
#endif
@@ -34,49 +34,42 @@ __RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
-#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
#include "tcp.h"
#include "ip.h"
-#ifdef INET6
#include "ip6.h"
-#endif
#include "ipproto.h"
#include "rpc_auth.h"
#include "rpc_msg.h"
-#include "nameser.h"
-
#ifdef HAVE_LIBCRYPTO
#include <openssl/md5.h>
-#include <signature.h>
+#include "signature.h"
-static int tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
+static int tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
const u_char *data, int length, const u_char *rcvsig);
#endif
-static void print_tcp_rst_data(register const u_char *sp, u_int length);
+static void print_tcp_rst_data(netdissect_options *, register const u_char *sp, u_int length);
+static void print_tcp_fastopen_option(netdissect_options *ndo, register const u_char *cp,
+ u_int datalen, int exp);
#define MAX_RST_DATA_LEN 30
struct tha {
-#ifndef INET6
struct in_addr src;
struct in_addr dst;
-#else
- struct in6_addr src;
- struct in6_addr dst;
-#endif /*INET6*/
u_int port;
};
@@ -87,14 +80,28 @@ struct tcp_seq_hash {
tcp_seq ack;
};
+struct tha6 {
+ struct in6_addr src;
+ struct in6_addr dst;
+ u_int port;
+};
+
+struct tcp_seq_hash6 {
+ struct tcp_seq_hash6 *nxt;
+ struct tha6 addr;
+ tcp_seq seq;
+ tcp_seq ack;
+};
+
#define TSEQ_HASHSIZE 919
/* These tcp optinos do not have the size octet */
#define ZEROLENOPT(o) ((o) == TCPOPT_EOL || (o) == TCPOPT_NOP)
-static struct tcp_seq_hash tcp_seq_hash[TSEQ_HASHSIZE];
+static struct tcp_seq_hash tcp_seq_hash4[TSEQ_HASHSIZE];
+static struct tcp_seq_hash6 tcp_seq_hash6[TSEQ_HASHSIZE];
-struct tok tcp_flag_values[] = {
+static const struct tok tcp_flag_values[] = {
{ TH_FIN, "F" },
{ TH_SYN, "S" },
{ TH_RST, "R" },
@@ -106,7 +113,7 @@ struct tok tcp_flag_values[] = {
{ 0, NULL }
};
-struct tok tcp_option_values[] = {
+static const struct tok tcp_option_values[] = {
{ TCPOPT_EOL, "eol" },
{ TCPOPT_NOP, "nop" },
{ TCPOPT_MAXSEG, "mss" },
@@ -120,328 +127,293 @@ struct tok tcp_option_values[] = {
{ TCPOPT_CCNEW, "ccnew" },
{ TCPOPT_CCECHO, "" },
{ TCPOPT_SIGNATURE, "md5" },
- { TCPOPT_AUTH, "enhanced auth" },
+ { TCPOPT_SCPS, "scps" },
{ TCPOPT_UTO, "uto" },
+ { TCPOPT_TCPAO, "tcp-ao" },
+ { TCPOPT_MPTCP, "mptcp" },
+ { TCPOPT_FASTOPEN, "tfo" },
+ { TCPOPT_EXPERIMENT2, "exp" },
{ 0, NULL }
};
-static int tcp_cksum(register const struct ip *ip,
- register const struct tcphdr *tp,
- register u_int len)
+static int
+tcp_cksum(netdissect_options *ndo,
+ register const struct ip *ip,
+ register const struct tcphdr *tp,
+ register u_int len)
+{
+ return nextproto4_cksum(ndo, ip, (const uint8_t *)tp, len, len,
+ IPPROTO_TCP);
+}
+
+static int
+tcp6_cksum(netdissect_options *ndo,
+ register const struct ip6_hdr *ip6,
+ register const struct tcphdr *tp,
+ register u_int len)
{
- return (nextproto4_cksum(ip, (const u_int8_t *)tp, len,
- IPPROTO_TCP));
+ return nextproto6_cksum(ndo, ip6, (const uint8_t *)tp, len, len,
+ IPPROTO_TCP);
}
void
-tcp_print(register const u_char *bp, register u_int length,
- register const u_char *bp2, int fragmented)
+tcp_print(netdissect_options *ndo,
+ register const u_char *bp, register u_int length,
+ register const u_char *bp2, int fragmented)
{
register const struct tcphdr *tp;
register const struct ip *ip;
register u_char flags;
register u_int hlen;
register char ch;
- u_int16_t sport, dport, win, urp;
- u_int32_t seq, ack, thseq, thack;
+ uint16_t sport, dport, win, urp;
+ uint32_t seq, ack, thseq, thack;
u_int utoval;
- int threv;
-#ifdef INET6
+ uint16_t magic;
+ register int rev;
register const struct ip6_hdr *ip6;
-#endif
- tp = (struct tcphdr *)bp;
- ip = (struct ip *)bp2;
-#ifdef INET6
+ tp = (const struct tcphdr *)bp;
+ ip = (const struct ip *)bp2;
if (IP_V(ip) == 6)
- ip6 = (struct ip6_hdr *)bp2;
+ ip6 = (const struct ip6_hdr *)bp2;
else
ip6 = NULL;
-#endif /*INET6*/
ch = '\0';
- if (!TTEST(tp->th_dport)) {
- (void)printf("%s > %s: [|tcp]",
- ipaddr_string(&ip->ip_src),
- ipaddr_string(&ip->ip_dst));
+ if (!ND_TTEST(tp->th_dport)) {
+ ND_PRINT((ndo, "%s > %s: [|tcp]",
+ ipaddr_string(ndo, &ip->ip_src),
+ ipaddr_string(ndo, &ip->ip_dst)));
return;
}
sport = EXTRACT_16BITS(&tp->th_sport);
dport = EXTRACT_16BITS(&tp->th_dport);
- hlen = TH_OFF(tp) * 4;
-
- /*
- * If data present, header length valid, and NFS port used,
- * assume NFS.
- * Pass offset of data plus 4 bytes for RPC TCP msg length
- * to NFS print routines.
- */
- if (!qflag && hlen >= sizeof(*tp) && hlen <= length &&
- (length - hlen) >= 4) {
- u_char *fraglenp;
- u_int32_t fraglen;
- register struct sunrpc_msg *rp;
- enum sunrpc_msg_type direction;
-
- fraglenp = (u_char *)tp + hlen;
- if (TTEST2(*fraglenp, 4)) {
- fraglen = EXTRACT_32BITS(fraglenp) & 0x7FFFFFFF;
- if (fraglen > (length - hlen) - 4)
- fraglen = (length - hlen) - 4;
- rp = (struct sunrpc_msg *)(fraglenp + 4);
- if (TTEST(rp->rm_direction)) {
- direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
- if (dport == NFS_PORT &&
- direction == SUNRPC_CALL) {
- nfsreq_print((u_char *)rp, fraglen,
- (u_char *)ip);
- return;
- }
- if (sport == NFS_PORT &&
- direction == SUNRPC_REPLY) {
- nfsreply_print((u_char *)rp, fraglen,
- (u_char *)ip);
- return;
- }
- }
- }
- }
-#ifdef INET6
if (ip6) {
if (ip6->ip6_nxt == IPPROTO_TCP) {
- (void)printf("%s.%s > %s.%s: ",
- ip6addr_string(&ip6->ip6_src),
- tcpport_string(sport),
- ip6addr_string(&ip6->ip6_dst),
- tcpport_string(dport));
+ ND_PRINT((ndo, "%s.%s > %s.%s: ",
+ ip6addr_string(ndo, &ip6->ip6_src),
+ tcpport_string(ndo, sport),
+ ip6addr_string(ndo, &ip6->ip6_dst),
+ tcpport_string(ndo, dport)));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT((ndo, "%s > %s: ",
+ tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
}
- } else
-#endif /*INET6*/
- {
+ } else {
if (ip->ip_p == IPPROTO_TCP) {
- (void)printf("%s.%s > %s.%s: ",
- ipaddr_string(&ip->ip_src),
- tcpport_string(sport),
- ipaddr_string(&ip->ip_dst),
- tcpport_string(dport));
+ ND_PRINT((ndo, "%s.%s > %s.%s: ",
+ ipaddr_string(ndo, &ip->ip_src),
+ tcpport_string(ndo, sport),
+ ipaddr_string(ndo, &ip->ip_dst),
+ tcpport_string(ndo, dport)));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT((ndo, "%s > %s: ",
+ tcpport_string(ndo, sport), tcpport_string(ndo, dport)));
}
}
+ ND_TCHECK(*tp);
+
+ hlen = TH_OFF(tp) * 4;
+
if (hlen < sizeof(*tp)) {
- (void)printf(" tcp %d [bad hdr length %u - too short, < %lu]",
- length - hlen, hlen, (unsigned long)sizeof(*tp));
+ ND_PRINT((ndo, " tcp %d [bad hdr length %u - too short, < %lu]",
+ length - hlen, hlen, (unsigned long)sizeof(*tp)));
return;
}
- TCHECK(*tp);
-
seq = EXTRACT_32BITS(&tp->th_seq);
ack = EXTRACT_32BITS(&tp->th_ack);
win = EXTRACT_16BITS(&tp->th_win);
urp = EXTRACT_16BITS(&tp->th_urp);
- if (qflag) {
- (void)printf("tcp %d", length - hlen);
+ if (ndo->ndo_qflag) {
+ ND_PRINT((ndo, "tcp %d", length - hlen));
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
+ ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
+ hlen, length));
}
return;
}
flags = tp->th_flags;
- printf("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
+ ND_PRINT((ndo, "Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags)));
- if (!Sflag && (flags & TH_ACK)) {
- register struct tcp_seq_hash *th;
- const void *src, *dst;
- register int rev;
- struct tha tha;
+ if (!ndo->ndo_Sflag && (flags & TH_ACK)) {
/*
* Find (or record) the initial sequence numbers for
* this conversation. (we pick an arbitrary
* collating order so there's only one entry for
* both directions).
*/
-#ifdef INET6
rev = 0;
if (ip6) {
+ register struct tcp_seq_hash6 *th;
+ struct tcp_seq_hash6 *tcp_seq_hash;
+ const struct in6_addr *src, *dst;
+ struct tha6 tha;
+
+ tcp_seq_hash = tcp_seq_hash6;
src = &ip6->ip6_src;
dst = &ip6->ip6_dst;
if (sport > dport)
rev = 1;
else if (sport == dport) {
- if (memcmp(src, dst, sizeof ip6->ip6_dst) > 0)
+ if (UNALIGNED_MEMCMP(src, dst, sizeof ip6->ip6_dst) > 0)
rev = 1;
}
if (rev) {
- memcpy(&tha.src, dst, sizeof ip6->ip6_dst);
- memcpy(&tha.dst, src, sizeof ip6->ip6_src);
+ UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip6->ip6_dst);
+ UNALIGNED_MEMCPY(&tha.dst, src, sizeof ip6->ip6_src);
tha.port = dport << 16 | sport;
} else {
- memcpy(&tha.dst, dst, sizeof ip6->ip6_dst);
- memcpy(&tha.src, src, sizeof ip6->ip6_src);
+ UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip6->ip6_dst);
+ UNALIGNED_MEMCPY(&tha.src, src, sizeof ip6->ip6_src);
tha.port = sport << 16 | dport;
}
+
+ for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
+ th->nxt; th = th->nxt)
+ if (memcmp((char *)&tha, (char *)&th->addr,
+ sizeof(th->addr)) == 0)
+ break;
+
+ if (!th->nxt || (flags & TH_SYN)) {
+ /* didn't find it or new conversation */
+ if (th->nxt == NULL) {
+ th->nxt = (struct tcp_seq_hash6 *)
+ calloc(1, sizeof(*th));
+ if (th->nxt == NULL)
+ (*ndo->ndo_error)(ndo,
+ "tcp_print: calloc");
+ }
+ th->addr = tha;
+ if (rev)
+ th->ack = seq, th->seq = ack - 1;
+ else
+ th->seq = seq, th->ack = ack - 1;
+ } else {
+ if (rev)
+ seq -= th->ack, ack -= th->seq;
+ else
+ seq -= th->seq, ack -= th->ack;
+ }
+
+ thseq = th->seq;
+ thack = th->ack;
} else {
- /*
- * Zero out the tha structure; the src and dst
- * fields are big enough to hold an IPv6
- * address, but we only have IPv4 addresses
- * and thus must clear out the remaining 124
- * bits.
- *
- * XXX - should we just clear those bytes after
- * copying the IPv4 addresses, rather than
- * zeroing out the entire structure and then
- * overwriting some of the zeroes?
- *
- * XXX - this could fail if we see TCP packets
- * with an IPv6 address with the lower 124 bits
- * all zero and also see TCP packes with an
- * IPv4 address with the same 32 bits as the
- * upper 32 bits of the IPv6 address in question.
- * Can that happen? Is it likely enough to be
- * an issue?
- */
- memset(&tha, 0, sizeof(tha));
- src = &ip->ip_src;
- dst = &ip->ip_dst;
+ register struct tcp_seq_hash *th;
+ struct tcp_seq_hash *tcp_seq_hash;
+ struct tha tha;
+
+ tcp_seq_hash = tcp_seq_hash4;
if (sport > dport)
rev = 1;
else if (sport == dport) {
- if (memcmp(src, dst, sizeof ip->ip_dst) > 0)
+ if (UNALIGNED_MEMCMP(&ip->ip_src, &ip->ip_dst, sizeof ip->ip_dst) > 0)
rev = 1;
}
if (rev) {
- memcpy(&tha.src, dst, sizeof ip->ip_dst);
- memcpy(&tha.dst, src, sizeof ip->ip_src);
+ UNALIGNED_MEMCPY(&tha.src, &ip->ip_dst, sizeof ip->ip_dst);
+ UNALIGNED_MEMCPY(&tha.dst, &ip->ip_src, sizeof ip->ip_src);
tha.port = dport << 16 | sport;
} else {
- memcpy(&tha.dst, dst, sizeof ip->ip_dst);
- memcpy(&tha.src, src, sizeof ip->ip_src);
+ UNALIGNED_MEMCPY(&tha.dst, &ip->ip_dst, sizeof ip->ip_dst);
+ UNALIGNED_MEMCPY(&tha.src, &ip->ip_src, sizeof ip->ip_src);
tha.port = sport << 16 | dport;
}
- }
-#else
- rev = 0;
- src = &ip->ip_src;
- dst = &ip->ip_dst;
- if (sport > dport)
- rev = 1;
- else if (sport == dport) {
- if (memcmp(src, dst, sizeof ip->ip_dst) > 0)
- rev = 1;
- }
- if (rev) {
- memcpy(&tha.src, dst, sizeof ip->ip_dst);
- memcpy(&tha.dst, src, sizeof ip->ip_src);
- tha.port = dport << 16 | sport;
- } else {
- memcpy(&tha.dst, dst, sizeof ip->ip_dst);
- memcpy(&tha.src, src, sizeof ip->ip_src);
- tha.port = sport << 16 | dport;
- }
-#endif
- threv = rev;
- for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
- th->nxt; th = th->nxt)
- if (memcmp((char *)&tha, (char *)&th->addr,
- sizeof(th->addr)) == 0)
- break;
+ for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
+ th->nxt; th = th->nxt)
+ if (memcmp((char *)&tha, (char *)&th->addr,
+ sizeof(th->addr)) == 0)
+ break;
- if (!th->nxt || (flags & TH_SYN)) {
- /* didn't find it or new conversation */
- if (th->nxt == NULL) {
- th->nxt = (struct tcp_seq_hash *)
- calloc(1, sizeof(*th));
- if (th->nxt == NULL)
- error("tcp_print: calloc");
+ if (!th->nxt || (flags & TH_SYN)) {
+ /* didn't find it or new conversation */
+ if (th->nxt == NULL) {
+ th->nxt = (struct tcp_seq_hash *)
+ calloc(1, sizeof(*th));
+ if (th->nxt == NULL)
+ (*ndo->ndo_error)(ndo,
+ "tcp_print: calloc");
+ }
+ th->addr = tha;
+ if (rev)
+ th->ack = seq, th->seq = ack - 1;
+ else
+ th->seq = seq, th->ack = ack - 1;
+ } else {
+ if (rev)
+ seq -= th->ack, ack -= th->seq;
+ else
+ seq -= th->seq, ack -= th->ack;
}
- th->addr = tha;
- if (rev)
- th->ack = seq, th->seq = ack - 1;
- else
- th->seq = seq, th->ack = ack - 1;
- } else {
- if (rev)
- seq -= th->ack, ack -= th->seq;
- else
- seq -= th->seq, ack -= th->ack;
- }
- thseq = th->seq;
- thack = th->ack;
+ thseq = th->seq;
+ thack = th->ack;
+ }
} else {
/*fool gcc*/
- thseq = thack = threv = 0;
+ thseq = thack = rev = 0;
}
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
+ ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]",
+ hlen, length));
return;
}
- if (vflag && !Kflag && !fragmented) {
+ if (ndo->ndo_vflag && !ndo->ndo_Kflag && !fragmented) {
/* Check the checksum, if possible. */
- u_int16_t sum, tcp_sum;
+ uint16_t sum, tcp_sum;
if (IP_V(ip) == 4) {
- if (TTEST2(tp->th_sport, length)) {
- sum = tcp_cksum(ip, tp, length);
+ if (ND_TTEST2(tp->th_sport, length)) {
+ sum = tcp_cksum(ndo, ip, tp, length);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum));
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
- in_cksum_shouldbe(tcp_sum, sum));
+ ND_PRINT((ndo, " (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum)));
else
- (void)printf(" (correct)");
+ ND_PRINT((ndo, " (correct)"));
}
- }
-#ifdef INET6
- else if (IP_V(ip) == 6 && ip6->ip6_plen) {
- if (TTEST2(tp->th_sport, length)) {
- sum = nextproto6_cksum(ip6, (const u_int8_t *)tp, length, IPPROTO_TCP);
+ } else if (IP_V(ip) == 6 && ip6->ip6_plen) {
+ if (ND_TTEST2(tp->th_sport, length)) {
+ sum = tcp6_cksum(ndo, ip6, tp, length);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum));
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
- in_cksum_shouldbe(tcp_sum, sum));
+ ND_PRINT((ndo, " (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum)));
else
- (void)printf(" (correct)");
+ ND_PRINT((ndo, " (correct)"));
}
}
-#endif
}
length -= hlen;
- if (vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) {
- (void)printf(", seq %u", seq);
+ if (ndo->ndo_vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) {
+ ND_PRINT((ndo, ", seq %u", seq));
if (length > 0) {
- (void)printf(":%u", seq + length);
+ ND_PRINT((ndo, ":%u", seq + length));
}
}
if (flags & TH_ACK) {
- (void)printf(", ack %u", ack);
+ ND_PRINT((ndo, ", ack %u", ack));
}
- (void)printf(", win %d", win);
+ ND_PRINT((ndo, ", win %d", win));
if (flags & TH_URG)
- (void)printf(", urg %d", urp);
+ ND_PRINT((ndo, ", urg %d", urp));
/*
* Handle any options.
*/
@@ -452,16 +424,16 @@ tcp_print(register const u_char *bp, register u_int length,
hlen -= sizeof(*tp);
cp = (const u_char *)tp + sizeof(*tp);
- printf(", options [");
+ ND_PRINT((ndo, ", options ["));
while (hlen > 0) {
if (ch != '\0')
- putchar(ch);
- TCHECK(*cp);
+ ND_PRINT((ndo, "%c", ch));
+ ND_TCHECK(*cp);
opt = *cp++;
if (ZEROLENOPT(opt))
len = 1;
else {
- TCHECK(*cp);
+ ND_TCHECK(*cp);
len = *cp++; /* total including type, len */
if (len < 2 || len > hlen)
goto bad;
@@ -471,46 +443,46 @@ tcp_print(register const u_char *bp, register u_int length,
datalen = 0;
/* Bail if "l" bytes of data are not left or were not captured */
-#define LENCHECK(l) { if ((l) > hlen) goto bad; TCHECK2(*cp, l); }
+#define LENCHECK(l) { if ((l) > hlen) goto bad; ND_TCHECK2(*cp, l); }
- printf("%s", tok2str(tcp_option_values, "Unknown Option %u", opt));
+ ND_PRINT((ndo, "%s", tok2str(tcp_option_values, "unknown-%u", opt)));
switch (opt) {
case TCPOPT_MAXSEG:
datalen = 2;
LENCHECK(datalen);
- (void)printf(" %u", EXTRACT_16BITS(cp));
+ ND_PRINT((ndo, " %u", EXTRACT_16BITS(cp)));
break;
case TCPOPT_WSCALE:
datalen = 1;
LENCHECK(datalen);
- (void)printf(" %u", *cp);
+ ND_PRINT((ndo, " %u", *cp));
break;
case TCPOPT_SACK:
datalen = len - 2;
if (datalen % 8 != 0) {
- (void)printf("malformed sack");
+ ND_PRINT((ndo, " invalid sack"));
} else {
- u_int32_t s, e;
+ uint32_t s, e;
- (void)printf(" %d ", datalen / 8);
+ ND_PRINT((ndo, " %d ", datalen / 8));
for (i = 0; i < datalen; i += 8) {
LENCHECK(i + 4);
s = EXTRACT_32BITS(cp + i);
LENCHECK(i + 8);
e = EXTRACT_32BITS(cp + i + 4);
- if (threv) {
+ if (rev) {
s -= thseq;
e -= thseq;
} else {
s -= thack;
e -= thack;
}
- (void)printf("{%u:%u}", s, e);
+ ND_PRINT((ndo, "{%u:%u}", s, e));
}
}
break;
@@ -527,53 +499,74 @@ tcp_print(register const u_char *bp, register u_int length,
*/
datalen = 4;
LENCHECK(datalen);
- (void)printf(" %u", EXTRACT_32BITS(cp));
+ ND_PRINT((ndo, " %u", EXTRACT_32BITS(cp)));
break;
case TCPOPT_TIMESTAMP:
datalen = 8;
LENCHECK(datalen);
- (void)printf(" val %u ecr %u",
+ ND_PRINT((ndo, " val %u ecr %u",
EXTRACT_32BITS(cp),
- EXTRACT_32BITS(cp + 4));
+ EXTRACT_32BITS(cp + 4)));
break;
case TCPOPT_SIGNATURE:
datalen = TCP_SIGLEN;
LENCHECK(datalen);
+ ND_PRINT((ndo, " "));
#ifdef HAVE_LIBCRYPTO
- switch (tcp_verify_signature(ip, tp,
+ switch (tcp_verify_signature(ndo, ip, tp,
bp + TH_OFF(tp) * 4, length, cp)) {
case SIGNATURE_VALID:
- (void)printf("valid");
+ ND_PRINT((ndo, "valid"));
break;
case SIGNATURE_INVALID:
- (void)printf("invalid");
+ ND_PRINT((ndo, "invalid"));
break;
case CANT_CHECK_SIGNATURE:
- (void)printf("can't check - ");
+ ND_PRINT((ndo, "can't check - "));
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
break;
}
#else
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT((ndo, "%02x", cp[i]));
#endif
break;
- case TCPOPT_AUTH:
- (void)printf("keyid %d", *cp++);
- datalen = len - 3;
- for (i = 0; i < datalen; ++i) {
- LENCHECK(i);
- (void)printf("%02x", cp[i]);
- }
+ case TCPOPT_SCPS:
+ datalen = 2;
+ LENCHECK(datalen);
+ ND_PRINT((ndo, " cap %02x id %u", cp[0], cp[1]));
break;
+ case TCPOPT_TCPAO:
+ datalen = len - 2;
+ /* RFC 5925 Section 2.2:
+ * "The Length value MUST be greater than or equal to 4."
+ * (This includes the Kind and Length fields already processed
+ * at this point.)
+ */
+ if (datalen < 2) {
+ ND_PRINT((ndo, " invalid"));
+ } else {
+ LENCHECK(1);
+ ND_PRINT((ndo, " keyid %u", cp[0]));
+ LENCHECK(2);
+ ND_PRINT((ndo, " rnextkeyid %u", cp[1]));
+ if (datalen > 2) {
+ ND_PRINT((ndo, " mac 0x"));
+ for (i = 2; i < datalen; i++) {
+ LENCHECK(i + 1);
+ ND_PRINT((ndo, "%02x", cp[i]));
+ }
+ }
+ }
+ break;
case TCPOPT_EOL:
case TCPOPT_NOP:
@@ -588,19 +581,57 @@ tcp_print(register const u_char *bp, register u_int length,
datalen = 2;
LENCHECK(datalen);
utoval = EXTRACT_16BITS(cp);
- (void)printf("0x%x", utoval);
+ ND_PRINT((ndo, " 0x%x", utoval));
if (utoval & 0x0001)
utoval = (utoval >> 1) * 60;
else
utoval >>= 1;
- (void)printf(" %u", utoval);
+ ND_PRINT((ndo, " %u", utoval));
+ break;
+
+ case TCPOPT_MPTCP:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (!mptcp_print(ndo, cp-2, len, flags))
+ goto bad;
+ break;
+
+ case TCPOPT_FASTOPEN:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ ND_PRINT((ndo, " "));
+ print_tcp_fastopen_option(ndo, cp, datalen, FALSE);
+ break;
+
+ case TCPOPT_EXPERIMENT2:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (datalen < 2)
+ goto bad;
+ /* RFC6994 */
+ magic = EXTRACT_16BITS(cp);
+ ND_PRINT((ndo, "-"));
+
+ switch(magic) {
+
+ case 0xf989: /* TCP Fast Open RFC 7413 */
+ print_tcp_fastopen_option(ndo, cp + 2, datalen - 2, TRUE);
+ break;
+
+ default:
+ /* Unknown magic number */
+ ND_PRINT((ndo, "%04x", magic));
+ break;
+ }
break;
default:
datalen = len - 2;
+ if (datalen)
+ ND_PRINT((ndo, " 0x"));
for (i = 0; i < datalen; ++i) {
- LENCHECK(i);
- (void)printf("%02x", cp[i]);
+ LENCHECK(i + 1);
+ ND_PRINT((ndo, "%02x", cp[i]));
}
break;
}
@@ -614,18 +645,18 @@ tcp_print(register const u_char *bp, register u_int length,
if (!ZEROLENOPT(opt))
++datalen; /* size octet */
if (datalen != len)
- (void)printf("[len %d]", len);
+ ND_PRINT((ndo, "[len %d]", len));
ch = ',';
if (opt == TCPOPT_EOL)
break;
}
- putchar(']');
+ ND_PRINT((ndo, "]"));
}
/*
* Print length field before crawling down the stack.
*/
- printf(", length %u", length);
+ ND_PRINT((ndo, ", length %u", length));
if (length <= 0)
return;
@@ -634,53 +665,109 @@ tcp_print(register const u_char *bp, register u_int length,
* Decode payload if necessary.
*/
bp += TH_OFF(tp) * 4;
- if ((flags & TH_RST) && vflag) {
- print_tcp_rst_data(bp, length);
+ if ((flags & TH_RST) && ndo->ndo_vflag) {
+ print_tcp_rst_data(ndo, bp, length);
+ return;
+ }
+
+ if (ndo->ndo_packettype) {
+ switch (ndo->ndo_packettype) {
+ case PT_ZMTP1:
+ zmtp1_print(ndo, bp, length);
+ break;
+ case PT_RESP:
+ resp_print(ndo, bp, length);
+ break;
+ }
return;
- }
-
- if (sport == TELNET_PORT || dport == TELNET_PORT) {
- if (!qflag && vflag)
- 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);
-#ifdef TCPDUMP_DO_SMB
- else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
- nbt_tcp_print(bp, length);
- else if (sport == SMB_PORT || dport == SMB_PORT)
- smb_tcp_print(bp, length);
+ }
+
+ if (IS_SRC_OR_DST_PORT(TELNET_PORT)) {
+ telnet_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(SMTP_PORT)) {
+ ND_PRINT((ndo, ": "));
+ smtp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(BGP_PORT))
+ bgp_print(ndo, bp, length);
+ else if (IS_SRC_OR_DST_PORT(PPTP_PORT))
+ pptp_print(ndo, bp);
+ else if (IS_SRC_OR_DST_PORT(REDIS_PORT))
+ resp_print(ndo, bp, length);
+#ifdef ENABLE_SMB
+ else if (IS_SRC_OR_DST_PORT(NETBIOS_SSN_PORT))
+ nbt_tcp_print(ndo, bp, length);
+ else if (IS_SRC_OR_DST_PORT(SMB_PORT))
+ smb_tcp_print(ndo, 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 ||
- sport == MULTICASTDNS_PORT || dport == MULTICASTDNS_PORT)) {
+ else if (IS_SRC_OR_DST_PORT(BEEP_PORT))
+ beep_print(ndo, bp, length);
+ else if (IS_SRC_OR_DST_PORT(OPENFLOW_PORT_OLD) || IS_SRC_OR_DST_PORT(OPENFLOW_PORT_IANA))
+ openflow_print(ndo, bp, length);
+ else if (IS_SRC_OR_DST_PORT(FTP_PORT)) {
+ ND_PRINT((ndo, ": "));
+ ftp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(HTTP_PORT) || IS_SRC_OR_DST_PORT(HTTP_PORT_ALT)) {
+ ND_PRINT((ndo, ": "));
+ http_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(RTSP_PORT) || IS_SRC_OR_DST_PORT(RTSP_PORT_ALT)) {
+ ND_PRINT((ndo, ": "));
+ rtsp_print(ndo, bp, length);
+ } else if (length > 2 &&
+ (IS_SRC_OR_DST_PORT(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, 0);
- } else if (sport == MSDP_PORT || dport == MSDP_PORT) {
- msdp_print(bp, length);
- } else if (sport == RPKI_RTR_PORT || dport == RPKI_RTR_PORT) {
- rpki_rtr_print(bp, length);
+ ns_print(ndo, bp + 2, length - 2, 0);
+ } else if (IS_SRC_OR_DST_PORT(MSDP_PORT)) {
+ msdp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(RPKI_RTR_PORT)) {
+ rpki_rtr_print(ndo, bp, length);
}
- else if (length > 0 && (sport == LDP_PORT || dport == LDP_PORT)) {
- ldp_print(bp, length);
+ else if (length > 0 && (IS_SRC_OR_DST_PORT(LDP_PORT))) {
+ ldp_print(ndo, bp, length);
+ }
+ else if ((IS_SRC_OR_DST_PORT(NFS_PORT)) &&
+ length >= 4 && ND_TTEST2(*bp, 4)) {
+ /*
+ * If data present, header length valid, and NFS port used,
+ * assume NFS.
+ * Pass offset of data plus 4 bytes for RPC TCP msg length
+ * to NFS print routines.
+ */
+ uint32_t fraglen;
+ register const struct sunrpc_msg *rp;
+ enum sunrpc_msg_type direction;
+
+ fraglen = EXTRACT_32BITS(bp) & 0x7FFFFFFF;
+ if (fraglen > (length) - 4)
+ fraglen = (length) - 4;
+ rp = (const struct sunrpc_msg *)(bp + 4);
+ if (ND_TTEST(rp->rm_direction)) {
+ direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+ if (dport == NFS_PORT && direction == SUNRPC_CALL) {
+ ND_PRINT((ndo, ": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+ nfsreq_print_noaddr(ndo, (const u_char *)rp, fraglen, (const u_char *)ip);
+ return;
+ }
+ if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
+ ND_PRINT((ndo, ": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid)));
+ nfsreply_print_noaddr(ndo, (const u_char *)rp, fraglen, (const u_char *)ip);
+ return;
+ }
+ }
}
return;
bad:
- fputs("[bad opt]", stdout);
+ ND_PRINT((ndo, "[bad opt]"));
if (ch != '\0')
- putchar('>');
+ ND_PRINT((ndo, ">"));
return;
trunc:
- fputs("[|tcp]", stdout);
+ ND_PRINT((ndo, "[|tcp]"));
if (ch != '\0')
- putchar('>');
+ ND_PRINT((ndo, ">"));
}
/*
@@ -699,51 +786,73 @@ tcp_print(register const u_char *bp, register u_int length,
*/
static void
-print_tcp_rst_data(register const u_char *sp, u_int length)
+print_tcp_rst_data(netdissect_options *ndo,
+ register const u_char *sp, u_int length)
{
int c;
- if (TTEST2(*sp, length))
- printf(" [RST");
- else
- printf(" [!RST");
+ ND_PRINT((ndo, ND_TTEST2(*sp, length) ? " [RST" : " [!RST"));
if (length > MAX_RST_DATA_LEN) {
length = MAX_RST_DATA_LEN; /* can use -X for longer */
- putchar('+'); /* indicate we truncate */
+ ND_PRINT((ndo, "+")); /* indicate we truncate */
}
- putchar(' ');
- while (length-- && sp <= snapend) {
+ ND_PRINT((ndo, " "));
+ while (length-- && sp < ndo->ndo_snapend) {
c = *sp++;
- safeputchar(c);
+ safeputchar(ndo, c);
+ }
+ ND_PRINT((ndo, "]"));
+}
+
+static void
+print_tcp_fastopen_option(netdissect_options *ndo, register const u_char *cp,
+ u_int datalen, int exp)
+{
+ u_int i;
+
+ if (exp)
+ ND_PRINT((ndo, "tfo"));
+
+ if (datalen == 0) {
+ /* Fast Open Cookie Request */
+ ND_PRINT((ndo, " cookiereq"));
+ } else {
+ /* Fast Open Cookie */
+ if (datalen % 2 != 0 || datalen < 4 || datalen > 16) {
+ ND_PRINT((ndo, " invalid"));
+ } else {
+ ND_PRINT((ndo, " cookie "));
+ for (i = 0; i < datalen; ++i)
+ ND_PRINT((ndo, "%02x", cp[i]));
+ }
}
- putchar(']');
}
#ifdef HAVE_LIBCRYPTO
+USES_APPLE_DEPRECATED_API
static int
-tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
+tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
const u_char *data, int length, const u_char *rcvsig)
{
struct tcphdr tp1;
u_char sig[TCP_SIGLEN];
char zero_proto = 0;
MD5_CTX ctx;
- u_int16_t savecsum, tlen;
-#ifdef INET6
- struct ip6_hdr *ip6;
- u_int32_t len32;
- u_int8_t nxt;
-#endif
+ uint16_t savecsum, tlen;
+ const struct ip6_hdr *ip6;
+ uint32_t len32;
+ uint8_t nxt;
- if (data + length > snapend) {
- printf("snaplen too short, ");
+ if (data + length > ndo->ndo_snapend) {
+ ND_PRINT((ndo, "snaplen too short, "));
return (CANT_CHECK_SIGNATURE);
}
tp1 = *tp;
- if (sigsecret == NULL) {
- printf("shared secret not supplied with -M, ");
+ if (ndo->ndo_sigsecret == NULL) {
+ ND_PRINT((ndo, "shared secret not supplied with -M, "));
return (CANT_CHECK_SIGNATURE);
}
@@ -752,33 +861,27 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
* Step 1: Update MD5 hash with IP pseudo-header.
*/
if (IP_V(ip) == 4) {
- MD5_Update(&ctx, (char *)&ip->ip_src, sizeof(ip->ip_src));
- MD5_Update(&ctx, (char *)&ip->ip_dst, sizeof(ip->ip_dst));
- MD5_Update(&ctx, (char *)&zero_proto, sizeof(zero_proto));
- MD5_Update(&ctx, (char *)&ip->ip_p, sizeof(ip->ip_p));
+ MD5_Update(&ctx, (const char *)&ip->ip_src, sizeof(ip->ip_src));
+ MD5_Update(&ctx, (const char *)&ip->ip_dst, sizeof(ip->ip_dst));
+ MD5_Update(&ctx, (const char *)&zero_proto, sizeof(zero_proto));
+ MD5_Update(&ctx, (const char *)&ip->ip_p, sizeof(ip->ip_p));
tlen = EXTRACT_16BITS(&ip->ip_len) - IP_HL(ip) * 4;
tlen = htons(tlen);
- MD5_Update(&ctx, (char *)&tlen, sizeof(tlen));
-#ifdef INET6
+ MD5_Update(&ctx, (const char *)&tlen, sizeof(tlen));
} else if (IP_V(ip) == 6) {
- ip6 = (struct ip6_hdr *)ip;
- MD5_Update(&ctx, (char *)&ip6->ip6_src, sizeof(ip6->ip6_src));
- MD5_Update(&ctx, (char *)&ip6->ip6_dst, sizeof(ip6->ip6_dst));
+ ip6 = (const struct ip6_hdr *)ip;
+ MD5_Update(&ctx, (const char *)&ip6->ip6_src, sizeof(ip6->ip6_src));
+ MD5_Update(&ctx, (const char *)&ip6->ip6_dst, sizeof(ip6->ip6_dst));
len32 = htonl(EXTRACT_16BITS(&ip6->ip6_plen));
- MD5_Update(&ctx, (char *)&len32, sizeof(len32));
+ MD5_Update(&ctx, (const char *)&len32, sizeof(len32));
nxt = 0;
- MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
- MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
- MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
+ MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
+ MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
+ MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
nxt = IPPROTO_TCP;
- MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
-#endif
+ MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
} else {
-#ifdef INET6
- printf("IP version not 4 or 6, ");
-#else
- printf("IP version not 4, ");
-#endif
+ ND_PRINT((ndo, "IP version not 4 or 6, "));
return (CANT_CHECK_SIGNATURE);
}
@@ -788,7 +891,7 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
*/
savecsum = tp1.th_sum;
tp1.th_sum = 0;
- MD5_Update(&ctx, (char *)&tp1, sizeof(struct tcphdr));
+ MD5_Update(&ctx, (const char *)&tp1, sizeof(struct tcphdr));
tp1.th_sum = savecsum;
/*
* Step 3: Update MD5 hash with TCP segment data, if present.
@@ -798,7 +901,7 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
/*
* Step 4: Update MD5 hash with shared secret.
*/
- MD5_Update(&ctx, sigsecret, strlen(sigsecret));
+ MD5_Update(&ctx, ndo->ndo_sigsecret, strlen(ndo->ndo_sigsecret));
MD5_Final(sig, &ctx);
if (memcmp(rcvsig, sig, TCP_SIGLEN) == 0)
@@ -806,6 +909,7 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
else
return (SIGNATURE_INVALID);
}
+USES_APPLE_RST
#endif /* HAVE_LIBCRYPTO */
/*
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 10:23:18 +0000