* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
+/* \summary: TCP printer */
+
#ifndef lint
#else
__RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
#endif
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
-#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include "interface.h"
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
+#include "diag-control.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,
- const u_char *data, int length, const u_char *rcvsig);
+static int tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
+ const u_char *data, u_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 *, const u_char *sp, u_int length);
+static void print_tcp_fastopen_option(netdissect_options *ndo, const u_char *cp,
+ u_int datalen);
#define MAX_RST_DATA_LEN 30
struct tha {
- struct in_addr src;
- struct in_addr dst;
+ nd_ipv4 src;
+ nd_ipv4 dst;
u_int port;
};
struct tcp_seq_hash {
struct tcp_seq_hash *nxt;
struct tha addr;
- tcp_seq seq;
- tcp_seq ack;
+ uint32_t seq;
+ uint32_t ack;
};
-#ifdef INET6
struct tha6 {
- struct in6_addr src;
- struct in6_addr dst;
+ nd_ipv6 src;
+ nd_ipv6 dst;
u_int port;
};
struct tcp_seq_hash6 {
struct tcp_seq_hash6 *nxt;
struct tha6 addr;
- tcp_seq seq;
- tcp_seq ack;
+ uint32_t seq;
+ uint32_t ack;
};
-#endif
#define TSEQ_HASHSIZE 919
-/* These tcp optinos do not have the size octet */
+/* These tcp options do not have the size octet */
#define ZEROLENOPT(o) ((o) == TCPOPT_EOL || (o) == TCPOPT_NOP)
static struct tcp_seq_hash tcp_seq_hash4[TSEQ_HASHSIZE];
-#ifdef INET6
static struct tcp_seq_hash6 tcp_seq_hash6[TSEQ_HASHSIZE];
-#endif
-static const struct tok tcp_flag_values[] = {
+const struct tok tcp_flag_values[] = {
{ TH_FIN, "F" },
{ TH_SYN, "S" },
{ TH_RST, "R" },
{ 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 uint16_t
+tcp_cksum(netdissect_options *ndo,
+ const struct ip *ip,
+ const struct tcphdr *tp,
+ u_int len)
{
- return (nextproto4_cksum(ip, (const u_int8_t *)tp, len,
- IPPROTO_TCP));
+ return nextproto4_cksum(ndo, ip, (const uint8_t *)tp, len, len,
+ IPPROTO_TCP);
+}
+
+static uint16_t
+tcp6_cksum(netdissect_options *ndo,
+ const struct ip6_hdr *ip6,
+ const struct tcphdr *tp,
+ u_int len)
+{
+ 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,
+ const u_char *bp, u_int length,
+ 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;
+ const struct tcphdr *tp;
+ const struct ip *ip;
+ u_char flags;
+ u_int hlen;
+ char ch;
+ uint16_t sport, dport, win, urp;
+ uint32_t seq, ack, thseq, thack;
u_int utoval;
- u_int16_t magic;
- register int rev;
-#ifdef INET6
- register const struct ip6_hdr *ip6;
-#endif
-
- tp = (struct tcphdr *)bp;
- ip = (struct ip *)bp2;
-#ifdef INET6
+ uint16_t magic;
+ int rev;
+ const struct ip6_hdr *ip6;
+ u_int header_len; /* Header length in bytes */
+
+ ndo->ndo_protocol = "tcp";
+ 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));
- return;
+ if (!ND_TTEST_2(tp->th_dport)) {
+ if (ip6) {
+ ND_PRINT("%s > %s:",
+ GET_IP6ADDR_STRING(ip6->ip6_src),
+ GET_IP6ADDR_STRING(ip6->ip6_dst));
+ } else {
+ ND_PRINT("%s > %s:",
+ GET_IPADDR_STRING(ip->ip_src),
+ GET_IPADDR_STRING(ip->ip_dst));
+ }
+ nd_trunc_longjmp(ndo);
}
- sport = EXTRACT_16BITS(&tp->th_sport);
- dport = EXTRACT_16BITS(&tp->th_dport);
+ sport = GET_BE_U_2(tp->th_sport);
+ dport = GET_BE_U_2(tp->th_dport);
- hlen = TH_OFF(tp) * 4;
-
-#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));
+ if (GET_U_1(ip6->ip6_nxt) == IPPROTO_TCP) {
+ ND_PRINT("%s.%s > %s.%s: ",
+ GET_IP6ADDR_STRING(ip6->ip6_src),
+ tcpport_string(ndo, sport),
+ GET_IP6ADDR_STRING(ip6->ip6_dst),
+ tcpport_string(ndo, dport));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT("%s > %s: ",
+ tcpport_string(ndo, sport), tcpport_string(ndo, dport));
}
- } else
-#endif /*INET6*/
- {
- 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));
+ } else {
+ if (GET_U_1(ip->ip_p) == IPPROTO_TCP) {
+ ND_PRINT("%s.%s > %s.%s: ",
+ GET_IPADDR_STRING(ip->ip_src),
+ tcpport_string(ndo, sport),
+ GET_IPADDR_STRING(ip->ip_dst),
+ tcpport_string(ndo, dport));
} else {
- (void)printf("%s > %s: ",
- tcpport_string(sport), tcpport_string(dport));
+ ND_PRINT("%s > %s: ",
+ tcpport_string(ndo, sport), tcpport_string(ndo, dport));
}
}
+ 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));
- return;
+ ND_PRINT(" tcp %u [bad hdr length %u - too short, < %zu]",
+ length - hlen, hlen, sizeof(*tp));
+ goto invalid;
}
- 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);
+ seq = GET_BE_U_4(tp->th_seq);
+ ack = GET_BE_U_4(tp->th_ack);
+ win = GET_BE_U_2(tp->th_win);
+ urp = GET_BE_U_2(tp->th_urp);
- if (qflag) {
- (void)printf("tcp %d", length - hlen);
+ if (ndo->ndo_qflag) {
+ ND_PRINT("tcp %u", length - hlen);
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
+ ND_PRINT(" [bad hdr length %u - too long, > %u]",
+ hlen, length);
+ goto invalid;
}
return;
}
- flags = tp->th_flags;
- printf("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
+ flags = GET_U_1(tp->th_flags);
+ ND_PRINT("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
- if (!Sflag && (flags & TH_ACK)) {
+ if (!ndo->ndo_Sflag && (flags & TH_ACK)) {
/*
* Find (or record) the initial sequence numbers for
* this conversation. (we pick an arbitrary
* both directions).
*/
rev = 0;
-#ifdef INET6
if (ip6) {
- register struct tcp_seq_hash6 *th;
+ struct tcp_seq_hash6 *th;
struct tcp_seq_hash6 *tcp_seq_hash;
- const struct in6_addr *src, *dst;
+ const void *src, *dst;
struct tha6 tha;
tcp_seq_hash = tcp_seq_hash6;
- src = &ip6->ip6_src;
- dst = &ip6->ip6_dst;
+ src = (const void *)ip6->ip6_src;
+ dst = (const void *)ip6->ip6_dst;
if (sport > dport)
rev = 1;
else if (sport == dport) {
- if (UNALIGNED_MEMCMP(src, dst, sizeof ip6->ip6_dst) > 0)
+ if (UNALIGNED_MEMCMP(src, dst, sizeof(ip6->ip6_dst)) > 0)
rev = 1;
}
if (rev) {
- UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip6->ip6_dst);
- UNALIGNED_MEMCPY(&tha.dst, src, sizeof ip6->ip6_src);
- tha.port = dport << 16 | sport;
+ UNALIGNED_MEMCPY(&tha.src, dst, sizeof(ip6->ip6_dst));
+ UNALIGNED_MEMCPY(&tha.dst, src, sizeof(ip6->ip6_src));
+ tha.port = ((u_int)dport) << 16 | sport;
} else {
- UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip6->ip6_dst);
- UNALIGNED_MEMCPY(&tha.src, src, sizeof ip6->ip6_src);
- tha.port = sport << 16 | dport;
+ UNALIGNED_MEMCPY(&tha.dst, dst, sizeof(ip6->ip6_dst));
+ UNALIGNED_MEMCPY(&tha.src, src, sizeof(ip6->ip6_src));
+ tha.port = ((u_int)sport) << 16 | dport;
}
for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
if (!th->nxt || (flags & TH_SYN)) {
/* didn't find it or new conversation */
+ /* calloc() return used by the 'tcp_seq_hash6'
+ hash table: do not free() */
if (th->nxt == NULL) {
th->nxt = (struct tcp_seq_hash6 *)
calloc(1, sizeof(*th));
if (th->nxt == NULL)
- error("tcp_print: calloc");
+ (*ndo->ndo_error)(ndo,
+ S_ERR_ND_MEM_ALLOC,
+ "%s: calloc", __func__);
}
th->addr = tha;
if (rev)
thseq = th->seq;
thack = th->ack;
} else {
-#else /*INET6*/
- {
-#endif /*INET6*/
- register struct tcp_seq_hash *th;
+ 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 (UNALIGNED_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) {
- UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip->ip_dst);
- UNALIGNED_MEMCPY(&tha.dst, src, sizeof ip->ip_src);
- tha.port = dport << 16 | sport;
+ UNALIGNED_MEMCPY(&tha.src, ip->ip_dst,
+ sizeof(ip->ip_dst));
+ UNALIGNED_MEMCPY(&tha.dst, ip->ip_src,
+ sizeof(ip->ip_src));
+ tha.port = ((u_int)dport) << 16 | sport;
} else {
- UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip->ip_dst);
- UNALIGNED_MEMCPY(&tha.src, src, sizeof ip->ip_src);
- tha.port = sport << 16 | dport;
+ UNALIGNED_MEMCPY(&tha.dst, ip->ip_dst,
+ sizeof(ip->ip_dst));
+ UNALIGNED_MEMCPY(&tha.src, ip->ip_src,
+ sizeof(ip->ip_src));
+ tha.port = ((u_int)sport) << 16 | dport;
}
for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE];
if (!th->nxt || (flags & TH_SYN)) {
/* didn't find it or new conversation */
+ /* calloc() return used by the 'tcp_seq_hash4'
+ hash table: do not free() */
if (th->nxt == NULL) {
th->nxt = (struct tcp_seq_hash *)
calloc(1, sizeof(*th));
if (th->nxt == NULL)
- error("tcp_print: calloc");
+ (*ndo->ndo_error)(ndo,
+ S_ERR_ND_MEM_ALLOC,
+ "%s: calloc", __func__);
}
th->addr = tha;
if (rev)
thseq = thack = rev = 0;
}
if (hlen > length) {
- (void)printf(" [bad hdr length %u - too long, > %u]",
- hlen, length);
- return;
+ ND_PRINT(" [bad hdr length %u - too long, > %u]",
+ hlen, length);
+ goto invalid;
}
- 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);
- tcp_sum = EXTRACT_16BITS(&tp->th_sum);
+ if (ND_TTEST_LEN(tp->th_sport, length)) {
+ sum = tcp_cksum(ndo, ip, tp, length);
+ tcp_sum = GET_BE_U_2(tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT(", cksum 0x%04x", tcp_sum);
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
+ ND_PRINT(" (incorrect -> 0x%04x)",
in_cksum_shouldbe(tcp_sum, sum));
else
- (void)printf(" (correct)");
+ ND_PRINT(" (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);
- tcp_sum = EXTRACT_16BITS(&tp->th_sum);
+ } else if (IP_V(ip) == 6) {
+ if (ND_TTEST_LEN(tp->th_sport, length)) {
+ sum = tcp6_cksum(ndo, ip6, tp, length);
+ tcp_sum = GET_BE_U_2(tp->th_sum);
- (void)printf(", cksum 0x%04x", tcp_sum);
+ ND_PRINT(", cksum 0x%04x", tcp_sum);
if (sum != 0)
- (void)printf(" (incorrect -> 0x%04x)",
+ ND_PRINT(" (incorrect -> 0x%04x)",
in_cksum_shouldbe(tcp_sum, sum));
else
- (void)printf(" (correct)");
+ ND_PRINT(" (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(", seq %u", seq);
if (length > 0) {
- (void)printf(":%u", seq + length);
+ ND_PRINT(":%u", seq + length);
}
}
if (flags & TH_ACK) {
- (void)printf(", ack %u", ack);
+ ND_PRINT(", ack %u", ack);
}
- (void)printf(", win %d", win);
+ ND_PRINT(", win %u", win);
if (flags & TH_URG)
- (void)printf(", urg %d", urp);
+ ND_PRINT(", urg %u", urp);
/*
* Handle any options.
*/
if (hlen > sizeof(*tp)) {
- register const u_char *cp;
- register u_int i, opt, datalen;
- register u_int len;
+ const u_char *cp;
+ u_int i, opt, datalen;
+ u_int len;
hlen -= sizeof(*tp);
cp = (const u_char *)tp + sizeof(*tp);
- printf(", options [");
+ ND_PRINT(", options [");
while (hlen > 0) {
if (ch != '\0')
- putchar(ch);
- TCHECK(*cp);
- opt = *cp++;
+ ND_PRINT("%c", ch);
+ opt = GET_U_1(cp);
+ cp++;
if (ZEROLENOPT(opt))
len = 1;
else {
- TCHECK(*cp);
- len = *cp++; /* total including type, len */
+ len = GET_U_1(cp);
+ cp++; /* total including type, len */
if (len < 2 || len > hlen)
goto bad;
--hlen; /* account for length byte */
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; }
- printf("%s", tok2str(tcp_option_values, "unknown-%u", opt));
+ ND_PRINT("%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(" %u", GET_BE_U_2(cp));
break;
case TCPOPT_WSCALE:
datalen = 1;
LENCHECK(datalen);
- (void)printf(" %u", *cp);
+ ND_PRINT(" %u", GET_U_1(cp));
break;
case TCPOPT_SACK:
datalen = len - 2;
if (datalen % 8 != 0) {
- (void)printf("malformed sack");
+ ND_PRINT(" invalid sack");
} else {
- u_int32_t s, e;
+ uint32_t s, e;
- (void)printf(" %d ", datalen / 8);
+ ND_PRINT(" %u ", datalen / 8);
for (i = 0; i < datalen; i += 8) {
LENCHECK(i + 4);
- s = EXTRACT_32BITS(cp + i);
+ s = GET_BE_U_4(cp + i);
LENCHECK(i + 8);
- e = EXTRACT_32BITS(cp + i + 4);
+ e = GET_BE_U_4(cp + i + 4);
if (rev) {
s -= thseq;
e -= thseq;
s -= thack;
e -= thack;
}
- (void)printf("{%u:%u}", s, e);
+ ND_PRINT("{%u:%u}", s, e);
}
}
break;
*/
datalen = 4;
LENCHECK(datalen);
- (void)printf(" %u", EXTRACT_32BITS(cp));
+ ND_PRINT(" %u", GET_BE_U_4(cp));
break;
case TCPOPT_TIMESTAMP:
datalen = 8;
LENCHECK(datalen);
- (void)printf(" val %u ecr %u",
- EXTRACT_32BITS(cp),
- EXTRACT_32BITS(cp + 4));
+ ND_PRINT(" val %u ecr %u",
+ GET_BE_U_4(cp),
+ GET_BE_U_4(cp + 4));
break;
case TCPOPT_SIGNATURE:
datalen = TCP_SIGLEN;
LENCHECK(datalen);
+ ND_TCHECK_LEN(cp, datalen);
+ ND_PRINT(" ");
#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("valid");
break;
case SIGNATURE_INVALID:
- (void)printf("invalid");
+ nd_print_invalid(ndo);
break;
case CANT_CHECK_SIGNATURE:
- (void)printf("can't check - ");
+ ND_PRINT("can't check - ");
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT("%02x",
+ GET_U_1(cp + i));
break;
}
#else
for (i = 0; i < TCP_SIGLEN; ++i)
- (void)printf("%02x", cp[i]);
+ ND_PRINT("%02x", GET_U_1(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(" cap %02x id %u", GET_U_1(cp),
+ GET_U_1(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_invalid(ndo);
+ } else {
+ LENCHECK(1);
+ ND_PRINT(" keyid %u", GET_U_1(cp));
+ LENCHECK(2);
+ ND_PRINT(" rnextkeyid %u",
+ GET_U_1(cp + 1));
+ if (datalen > 2) {
+ ND_PRINT(" mac 0x");
+ for (i = 2; i < datalen; i++) {
+ LENCHECK(i + 1);
+ ND_PRINT("%02x",
+ GET_U_1(cp + i));
+ }
+ }
+ }
+ break;
case TCPOPT_EOL:
case TCPOPT_NOP:
case TCPOPT_UTO:
datalen = 2;
LENCHECK(datalen);
- utoval = EXTRACT_16BITS(cp);
- (void)printf("0x%x", utoval);
+ utoval = GET_BE_U_2(cp);
+ ND_PRINT(" 0x%x", utoval);
if (utoval & 0x0001)
utoval = (utoval >> 1) * 60;
else
utoval >>= 1;
- (void)printf(" %u", utoval);
+ ND_PRINT(" %u", utoval);
break;
case TCPOPT_MPTCP:
+ {
+ const u_char *snapend_save;
+ int ret;
+
datalen = len - 2;
LENCHECK(datalen);
- if (!mptcp_print(cp-2, len, flags))
+ /* FIXME: Proof-read mptcp_print() and if it
+ * always covers all bytes when it returns 1,
+ * only do ND_TCHECK_LEN() if it returned 0.
+ */
+ ND_TCHECK_LEN(cp, datalen);
+ /* Update the snapend to the end of the option
+ * before calling mptcp_print(). Some options
+ * (MPTCP or others) may be present after a
+ * MPTCP option. This prevents that, in
+ * mptcp_print(), the remaining length < the
+ * remaining caplen.
+ */
+ snapend_save = ndo->ndo_snapend;
+ ndo->ndo_snapend = ND_MIN(cp - 2 + len,
+ ndo->ndo_snapend);
+ ret = mptcp_print(ndo, cp - 2, len, flags);
+ ndo->ndo_snapend = snapend_save;
+ if (!ret)
goto bad;
break;
+ }
+
+ case TCPOPT_FASTOPEN:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ ND_TCHECK_LEN(cp, datalen);
+ ND_PRINT(" ");
+ print_tcp_fastopen_option(ndo, cp, datalen);
+ break;
case TCPOPT_EXPERIMENT2:
datalen = len - 2;
LENCHECK(datalen);
+ ND_TCHECK_LEN(cp, datalen);
if (datalen < 2)
goto bad;
/* RFC6994 */
- magic = EXTRACT_16BITS(cp);
- (void)printf("-");
+ magic = GET_BE_U_2(cp);
+ ND_PRINT("-");
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]);
- }
- }
+ case 0xf989: /* TCP Fast Open RFC 7413 */
+ ND_PRINT("tfo");
+ print_tcp_fastopen_option(ndo, cp + 2, datalen - 2);
break;
default:
/* Unknown magic number */
- (void)printf("%04x", magic);
+ ND_PRINT("%04x", magic);
break;
}
break;
default:
datalen = len - 2;
if (datalen)
- printf(" 0x");
+ ND_PRINT(" 0x");
for (i = 0; i < datalen; ++i) {
- LENCHECK(i);
- (void)printf("%02x", cp[i]);
+ LENCHECK(i + 1);
+ ND_PRINT("%02x", GET_U_1(cp + i));
}
break;
}
hlen -= datalen;
/* Check specification against observed length */
- ++datalen; /* option octet */
+ ++datalen; /* option octet */
if (!ZEROLENOPT(opt))
- ++datalen; /* size octet */
+ ++datalen; /* size octet */
if (datalen != len)
- (void)printf("[len %d]", len);
+ ND_PRINT("[len %u]", len);
ch = ',';
if (opt == TCPOPT_EOL)
break;
}
- putchar(']');
+ ND_PRINT("]");
}
/*
* Print length field before crawling down the stack.
*/
- printf(", length %u", length);
+ ND_PRINT(", length %u", length);
if (length <= 0)
return;
/*
* Decode payload if necessary.
*/
- bp += TH_OFF(tp) * 4;
- if ((flags & TH_RST) && vflag) {
- print_tcp_rst_data(bp, length);
+ header_len = TH_OFF(tp) * 4;
+ /*
+ * Do a bounds check before decoding the payload.
+ * At least the header data is required.
+ */
+ if (!ND_TTEST_LEN(bp, header_len)) {
+ ND_PRINT(" [remaining caplen(%u) < header length(%u)]",
+ ND_BYTES_AVAILABLE_AFTER(bp), header_len);
+ nd_trunc_longjmp(ndo);
+ }
+ bp += header_len;
+ if ((flags & TH_RST) && ndo->ndo_vflag) {
+ print_tcp_rst_data(ndo, bp, length);
return;
}
- if (packettype) {
- switch (packettype) {
+ if (ndo->ndo_packettype) {
+ switch (ndo->ndo_packettype) {
case PT_ZMTP1:
- zmtp1_print(bp, length);
+ zmtp1_print(ndo, bp, length);
+ break;
+ case PT_RESP:
+ resp_print(ndo, bp, length);
+ break;
+ case PT_DOMAIN:
+ /* over_tcp: TRUE, is_mdns: FALSE */
+ domain_print(ndo, bp, length, TRUE, FALSE);
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(": ");
+ smtp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(WHOIS_PORT)) {
+ ND_PRINT(": ");
+ ndo->ndo_protocol = "whois"; /* needed by txtproto_print() */
+ txtproto_print(ndo, bp, length, NULL, 0); /* RFC 3912 */
+ } 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);
+ else if (IS_SRC_OR_DST_PORT(SSH_PORT))
+ ssh_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 (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)) {
- /*
- * 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);
- }
- 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)) {
+ 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(": ");
+ ftp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(HTTP_PORT) || IS_SRC_OR_DST_PORT(HTTP_PORT_ALT)) {
+ ND_PRINT(": ");
+ http_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(RTSP_PORT) || IS_SRC_OR_DST_PORT(RTSP_PORT_ALT)) {
+ ND_PRINT(": ");
+ rtsp_print(ndo, bp, length);
+ } else if (IS_SRC_OR_DST_PORT(NAMESERVER_PORT)) {
+ /* over_tcp: TRUE, is_mdns: FALSE */
+ domain_print(ndo, bp, length, TRUE, FALSE);
+ } 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 (IS_SRC_OR_DST_PORT(LDP_PORT)) {
+ ldp_print(ndo, bp, length);
+ } else if ((IS_SRC_OR_DST_PORT(NFS_PORT)) &&
+ length >= 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;
+ uint32_t fraglen;
+ const struct sunrpc_msg *rp;
enum sunrpc_msg_type direction;
- fraglen = EXTRACT_32BITS(bp) & 0x7FFFFFFF;
+ fraglen = GET_BE_U_4(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);
+ rp = (const struct sunrpc_msg *)(bp + 4);
+ if (ND_TTEST_4(rp->rm_direction)) {
+ direction = (enum sunrpc_msg_type) GET_BE_U_4(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);
+ ND_PRINT(": NFS request xid %u ",
+ GET_BE_U_4(rp->rm_xid));
+ nfsreq_noaddr_print(ndo, (const u_char *)rp, fraglen, (const 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);
+ ND_PRINT(": NFS reply xid %u ",
+ GET_BE_U_4(rp->rm_xid));
+ nfsreply_noaddr_print(ndo, (const u_char *)rp, fraglen, (const u_char *)ip);
return;
}
}
}
return;
- bad:
- fputs("[bad opt]", stdout);
+bad:
+ ND_PRINT("[bad opt]");
if (ch != '\0')
- putchar('>');
+ ND_PRINT("]");
return;
- trunc:
- fputs("[|tcp]", stdout);
- if (ch != '\0')
- putchar('>');
+invalid:
+ nd_print_invalid(ndo);
}
/*
*/
static void
-print_tcp_rst_data(register const u_char *sp, u_int length)
+print_tcp_rst_data(netdissect_options *ndo,
+ const u_char *sp, u_int length)
{
- int c;
-
- if (TTEST2(*sp, length))
- printf(" [RST");
- else
- printf(" [!RST");
+ ND_PRINT(ND_TTEST_LEN(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("+"); /* indicate we truncate */
}
- putchar(' ');
- while (length-- && sp <= snapend) {
- c = *sp++;
- safeputchar(c);
+ ND_PRINT(" ");
+ (void)nd_printn(ndo, sp, length, ndo->ndo_snapend);
+ ND_PRINT("]");
+}
+
+static void
+print_tcp_fastopen_option(netdissect_options *ndo, const u_char *cp,
+ u_int datalen)
+{
+ u_int i;
+
+ if (datalen == 0) {
+ /* Fast Open Cookie Request */
+ ND_PRINT(" cookiereq");
+ } else {
+ /* Fast Open Cookie */
+ if (datalen % 2 != 0 || datalen < 4 || datalen > 16) {
+ nd_print_invalid(ndo);
+ } else {
+ ND_PRINT(" cookie ");
+ for (i = 0; i < datalen; ++i)
+ ND_PRINT("%02x", GET_U_1(cp + i));
+ }
}
- putchar(']');
}
#ifdef HAVE_LIBCRYPTO
-USES_APPLE_DEPRECATED_API
+DIAG_OFF_DEPRECATION
static int
-tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
- const u_char *data, int length, const u_char *rcvsig)
+tcp_verify_signature(netdissect_options *ndo,
+ const struct ip *ip, const struct tcphdr *tp,
+ const u_char *data, u_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, ");
- return (CANT_CHECK_SIGNATURE);
- }
+ if (!ND_TTEST_LEN(data, length)) {
+ ND_PRINT("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("shared secret not supplied with -M, ");
return (CANT_CHECK_SIGNATURE);
}
* 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));
- tlen = EXTRACT_16BITS(&ip->ip_len) - IP_HL(ip) * 4;
+ 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 = GET_BE_U_2(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));
- len32 = htonl(EXTRACT_16BITS(&ip6->ip6_plen));
- MD5_Update(&ctx, (char *)&len32, sizeof(len32));
+ 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(GET_BE_U_2(ip6->ip6_plen));
+ 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("IP version not 4 or 6, ");
return (CANT_CHECK_SIGNATURE);
}
* Step 2: Update MD5 hash with TCP header, excluding options.
* The TCP checksum must be set to zero.
*/
- savecsum = tp1.th_sum;
- tp1.th_sum = 0;
- MD5_Update(&ctx, (char *)&tp1, sizeof(struct tcphdr));
- tp1.th_sum = savecsum;
+ memcpy(&savecsum, tp1.th_sum, sizeof(savecsum));
+ memset(tp1.th_sum, 0, sizeof(tp1.th_sum));
+ MD5_Update(&ctx, (const char *)&tp1, sizeof(struct tcphdr));
+ memcpy(tp1.th_sum, &savecsum, sizeof(tp1.th_sum));
/*
* Step 3: Update MD5 hash with TCP segment data, if present.
*/
/*
* 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)
else
return (SIGNATURE_INVALID);
}
-USES_APPLE_RST
+DIAG_ON_DEPRECATION
#endif /* HAVE_LIBCRYPTO */
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
projects / tcpdump / blobdiff