*/
#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
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;
};
tcp_seq ack;
};
+#ifdef INET6
+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;
+};
+#endif
+
#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];
+#ifdef INET6
+static struct tcp_seq_hash6 tcp_seq_hash6[TSEQ_HASHSIZE];
+#endif
-struct tok tcp_flag_values[] = {
+static const struct tok tcp_flag_values[] = {
{ TH_FIN, "F" },
{ TH_SYN, "S" },
{ TH_RST, "R" },
{ 0, NULL }
};
-struct tok tcp_option_values[] = {
+static const struct tok tcp_option_values[] = {
{ TCPOPT_EOL, "eol" },
{ TCPOPT_NOP, "nop" },
{ TCPOPT_MAXSEG, "mss" },
{ TCPOPT_SIGNATURE, "md5" },
{ TCPOPT_AUTH, "enhanced auth" },
{ TCPOPT_UTO, "uto" },
+ { TCPOPT_MPTCP, "mptcp" },
+ { TCPOPT_EXPERIMENT2, "exp" },
{ 0, NULL }
};
register const struct tcphdr *tp,
register u_int len)
{
- union phu {
- struct phdr {
- u_int32_t src;
- u_int32_t dst;
- u_char mbz;
- u_char proto;
- u_int16_t len;
- } ph;
- u_int16_t pa[6];
- } phu;
- const u_int16_t *sp;
-
- /* pseudo-header.. */
- phu.ph.len = htons((u_int16_t)len);
- phu.ph.mbz = 0;
- phu.ph.proto = IPPROTO_TCP;
- memcpy(&phu.ph.src, &ip->ip_src.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];
- return in_cksum((u_short *)tp, len,
- sp[0]+sp[1]+sp[2]+sp[3]+sp[4]+sp[5]);
-}
-
-#ifdef INET6
-static int tcp6_cksum(const struct ip6_hdr *ip6, const struct tcphdr *tp,
- u_int len)
-{
- size_t i;
- u_int32_t sum = 0;
- union {
- struct {
- struct in6_addr ph_src;
- struct in6_addr ph_dst;
- u_int32_t ph_len;
- u_int8_t ph_zero[3];
- u_int8_t ph_nxt;
- } ph;
- u_int16_t pa[20];
- } phu;
-
- /* pseudo-header */
- memset(&phu, 0, sizeof(phu));
- phu.ph.ph_src = ip6->ip6_src;
- phu.ph.ph_dst = ip6->ip6_dst;
- phu.ph.ph_len = htonl(len);
- phu.ph.ph_nxt = IPPROTO_TCP;
-
- for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++)
- sum += phu.pa[i];
-
- return in_cksum((u_short *)tp, len, sum);
+ return (nextproto4_cksum(ip, (const u_int8_t *)tp, len,
+ IPPROTO_TCP));
}
-#endif
void
tcp_print(register const u_char *bp, register u_int length,
register char ch;
u_int16_t sport, dport, win, urp;
u_int32_t seq, ack, thseq, thack;
- int threv;
+ u_int utoval;
+ u_int16_t magic;
+ register int rev;
#ifdef INET6
register const struct ip6_hdr *ip6;
#endif
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) {
printf("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;
/*
* 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
- memset(&tha, 0, sizeof(tha));
rev = 0;
+#ifdef INET6
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)
+ error("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 {
+#else /*INET6*/
+ {
+#endif /*INET6*/
+ register struct tcp_seq_hash *th;
+ struct tcp_seq_hash *tcp_seq_hash;
+ const struct in_addr *src, *dst;
+ struct tha tha;
+
+ tcp_seq_hash = tcp_seq_hash4;
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)
+ if (UNALIGNED_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);
+ UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip->ip_dst);
+ UNALIGNED_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);
+ UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip->ip_dst);
+ UNALIGNED_MEMCPY(&tha.src, 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)
+ error("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]",
return;
}
- if (IP_V(ip) == 4 && vflag && !Kflag && !fragmented) {
+ if (vflag && !Kflag && !fragmented) {
+ /* Check the checksum, if possible. */
u_int16_t sum, tcp_sum;
- if (TTEST2(tp->th_sport, length)) {
- sum = tcp_cksum(ip, tp, length);
- (void)printf(", cksum 0x%04x",EXTRACT_16BITS(&tp->th_sum));
- if (sum != 0) {
+ if (IP_V(ip) == 4) {
+ if (TTEST2(tp->th_sport, length)) {
+ sum = tcp_cksum(ip, tp, length);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(" (incorrect -> 0x%04x)",in_cksum_shouldbe(tcp_sum, sum));
- } else
- (void)printf(" (correct)");
+
+ (void)printf(", cksum 0x%04x", tcp_sum);
+ if (sum != 0)
+ (void)printf(" (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum));
+ else
+ (void)printf(" (correct)");
+ }
}
- }
#ifdef INET6
- if (IP_V(ip) == 6 && ip6->ip6_plen && vflag && !Kflag && !fragmented) {
- u_int16_t sum,tcp_sum;
- if (TTEST2(tp->th_sport, length)) {
- sum = tcp6_cksum(ip6, tp, length);
- (void)printf(", cksum 0x%04x",EXTRACT_16BITS(&tp->th_sum));
- if (sum != 0) {
+ 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);
tcp_sum = EXTRACT_16BITS(&tp->th_sum);
- (void)printf(" (incorrect -> 0x%04x)",in_cksum_shouldbe(tcp_sum, sum));
- } else
- (void)printf(" (correct)");
+ (void)printf(", cksum 0x%04x", tcp_sum);
+ if (sum != 0)
+ (void)printf(" (incorrect -> 0x%04x)",
+ in_cksum_shouldbe(tcp_sum, sum));
+ else
+ (void)printf(" (correct)");
+
+ }
}
- }
#endif
+ }
length -= hlen;
if (vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) {
#define LENCHECK(l) { if ((l) > hlen) goto bad; TCHECK2(*cp, l); }
- printf("%s", tok2str(tcp_option_values, "Unknown Option %u", opt));
+ printf("%s", tok2str(tcp_option_values, "unknown-%u", opt));
switch (opt) {
s = EXTRACT_32BITS(cp + i);
LENCHECK(i + 8);
e = EXTRACT_32BITS(cp + i + 4);
- if (threv) {
+ if (rev) {
s -= thseq;
e -= thseq;
} else {
case TCPOPT_UTO:
datalen = 2;
LENCHECK(datalen);
- uint utoval = EXTRACT_16BITS(cp);
+ utoval = EXTRACT_16BITS(cp);
(void)printf("0x%x", utoval);
if (utoval & 0x0001)
utoval = (utoval >> 1) * 60;
(void)printf(" %u", utoval);
break;
+ case TCPOPT_MPTCP:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (!mptcp_print(cp-2, len, flags))
+ goto bad;
+ break;
+
+ case TCPOPT_EXPERIMENT2:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (datalen < 2)
+ goto bad;
+ /* RFC6994 */
+ magic = EXTRACT_16BITS(cp);
+ (void)printf("-");
+
+ switch(magic) {
+
+ case 0xf989:
+ /* TCP Fast Open: draft-ietf-tcpm-fastopen-04 */
+ if (datalen == 2) {
+ /* Fast Open Cookie Request */
+ (void)printf("tfo cookiereq");
+ } else {
+ /* Fast Open Cookie */
+ if (datalen % 2 != 0 || datalen < 6 || datalen > 18) {
+ (void)printf("tfo malformed");
+ } else {
+ (void)printf("tfo cookie ");
+ for (i = 2; i < datalen; ++i)
+ (void)printf("%02x", cp[i]);
+ }
+ }
+ break;
+
+ default:
+ /* Unknown magic number */
+ (void)printf("%04x", magic);
+ break;
+ }
+ break;
+
default:
datalen = len - 2;
+ if (datalen)
+ printf(" 0x");
for (i = 0; i < datalen; ++i) {
LENCHECK(i);
(void)printf("%02x", cp[i]);
if ((flags & TH_RST) && vflag) {
print_tcp_rst_data(bp, length);
return;
- }
+ }
+
+ if (packettype) {
+ switch (packettype) {
+ case PT_ZMTP1:
+ zmtp1_print(bp, length);
+ break;
+ }
+ return;
+ }
if (sport == TELNET_PORT || dport == TELNET_PORT) {
if (!qflag && vflag)
#endif
else if (sport == BEEP_PORT || dport == BEEP_PORT)
beep_print(bp, length);
+ else if (sport == OPENFLOW_PORT || dport == OPENFLOW_PORT)
+ openflow_print(bp, length);
else if (length > 2 &&
(sport == NAMESERVER_PORT || dport == NAMESERVER_PORT ||
sport == MULTICASTDNS_PORT || dport == MULTICASTDNS_PORT)) {
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);
}
else if (length > 0 && (sport == LDP_PORT || dport == LDP_PORT)) {
ldp_print(bp, length);
}
+ else if ((sport == NFS_PORT || dport == NFS_PORT) &&
+ length >= 4 && 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.
+ */
+ u_int32_t fraglen;
+ register struct sunrpc_msg *rp;
+ enum sunrpc_msg_type direction;
+
+ fraglen = EXTRACT_32BITS(bp) & 0x7FFFFFFF;
+ if (fraglen > (length) - 4)
+ fraglen = (length) - 4;
+ rp = (struct sunrpc_msg *)(bp + 4);
+ if (TTEST(rp->rm_direction)) {
+ direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+ if (dport == NFS_PORT && direction == SUNRPC_CALL) {
+ (void)printf(": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid));
+ nfsreq_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ return;
+ }
+ if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
+ (void)printf(": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid));
+ nfsreply_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ return;
+ }
+ }
+ }
return;
bad:
}
#ifdef HAVE_LIBCRYPTO
+USES_APPLE_DEPRECATED_API
static int
tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
const u_char *data, int length, const u_char *rcvsig)
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));
- len32 = htonl(ntohs(ip6->ip6_plen));
+ len32 = htonl(EXTRACT_16BITS(&ip6->ip6_plen));
MD5_Update(&ctx, (char *)&len32, sizeof(len32));
nxt = 0;
MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
else
return (SIGNATURE_INVALID);
}
+USES_APPLE_RST
#endif /* HAVE_LIBCRYPTO */
/*
projects / tcpdump / blobdiff