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ESP: Delete a useless custom bounds check
[tcpdump] / print-tcp.c
diff --git a/print-tcp.c b/print-tcp.c
index 032001d1564c88cac98746b47dd39228e882409f..4314ec22bfbe78aad18489c86f19c92642a900b8 100644 (file)
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -23,78 +23,86 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
+/* \summary: TCP printer */
+
 #ifndef lint
 #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
 
 #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"
-#endif
+#include <config.h>
 
 
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
 
 
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.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 "addrtoname.h"
 #include "extract.h"
 
+#include "diag-control.h"
+
 #include "tcp.h"
 
 #include "ip.h"
 #include "tcp.h"
 
 #include "ip.h"
-#ifdef INET6
 #include "ip6.h"
 #include "ip6.h"
-#endif
 #include "ipproto.h"
 #include "rpc_auth.h"
 #include "rpc_msg.h"
 
 #include "ipproto.h"
 #include "rpc_auth.h"
 #include "rpc_msg.h"
 
-#include "nameser.h"
-
 #ifdef HAVE_LIBCRYPTO
 #include <openssl/md5.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
 
 #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 {
 
 #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*/
+        nd_ipv4 src;
+        nd_ipv4 dst;
         u_int port;
 };
 
 struct tcp_seq_hash {
         struct tcp_seq_hash *nxt;
         struct tha addr;
         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;
+};
+
+struct tha6 {
+        nd_ipv6 src;
+        nd_ipv6 dst;
+        u_int port;
+};
+
+struct tcp_seq_hash6 {
+        struct tcp_seq_hash6 *nxt;
+        struct tha6 addr;
+        uint32_t seq;
+        uint32_t ack;
 };
 
 #define TSEQ_HASHSIZE 919
 
 };
 
 #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)
 
 #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[] = {
+const struct tok tcp_flag_values[] = {
         { TH_FIN, "F" },
         { TH_SYN, "S" },
         { TH_RST, "R" },
         { TH_FIN, "F" },
         { TH_SYN, "S" },
         { TH_RST, "R" },
@@ -103,10 +111,11 @@ struct tok tcp_flag_values[] = {
         { TH_URG, "U" },
         { TH_ECNECHO, "E" },
         { TH_CWR, "W" },
         { TH_URG, "U" },
         { TH_ECNECHO, "E" },
         { TH_CWR, "W" },
+        { TH_AE, "e" },
         { 0, NULL }
 };
 
         { 0, NULL }
 };
 
-struct tok tcp_option_values[] = {
+static const struct tok tcp_option_values[] = {
         { TCPOPT_EOL, "eol" },
         { TCPOPT_NOP, "nop" },
         { TCPOPT_MAXSEG, "mss" },
         { TCPOPT_EOL, "eol" },
         { TCPOPT_NOP, "nop" },
         { TCPOPT_MAXSEG, "mss" },
@@ -118,352 +127,338 @@ struct tok tcp_option_values[] = {
         { TCPOPT_TIMESTAMP, "TS" },
         { TCPOPT_CC, "cc" },
         { TCPOPT_CCNEW, "ccnew" },
         { TCPOPT_TIMESTAMP, "TS" },
         { TCPOPT_CC, "cc" },
         { TCPOPT_CCNEW, "ccnew" },
-        { TCPOPT_CCECHO, "" },
+        { TCPOPT_CCECHO, "ccecho" },
         { TCPOPT_SIGNATURE, "md5" },
         { TCPOPT_SIGNATURE, "md5" },
-        { TCPOPT_AUTH, "enhanced auth" },
+        { TCPOPT_SCPS, "scps" },
         { TCPOPT_UTO, "uto" },
         { TCPOPT_UTO, "uto" },
+        { TCPOPT_TCPAO, "tcp-ao" },
         { TCPOPT_MPTCP, "mptcp" },
         { TCPOPT_MPTCP, "mptcp" },
+        { TCPOPT_FASTOPEN, "tfo" },
+        { TCPOPT_EXPERIMENT2, "exp" },
         { 0, NULL }
 };
 
         { 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(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 (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
 }
 
 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;
+        uint16_t flags;
+        u_int hlen;
+        char ch;
+        uint16_t sport, dport, win, urp;
+        uint32_t seq, ack, thseq, thack;
         u_int utoval;
         u_int utoval;
-        int threv;
-#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)
         if (IP_V(ip) == 6)
-                ip6 = (struct ip6_hdr *)bp2;
+                ip6 = (const struct ip6_hdr *)bp2;
         else
                 ip6 = NULL;
         else
                 ip6 = NULL;
-#endif /*INET6*/
         ch = '\0';
         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;
-
-        /*
-        * 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) {
-                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 {
                 } 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 {
                 } 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)) {
         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) {
                 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;
         }
 
                 }
                 return;
         }
 
-        flags = tp->th_flags;
-        printf("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
+        flags = tcp_get_flags(tp);
+        ND_PRINT("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).
                  */
                 /*
                  * 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) {
                 rev = 0;
                 if (ip6) {
-                        src = &ip6->ip6_src;
-                        dst = &ip6->ip6_dst;
+                        struct tcp_seq_hash6 *th;
+                        struct tcp_seq_hash6 *tcp_seq_hash;
+                        const void *src, *dst;
+                        struct tha6 tha;
+
+                        tcp_seq_hash = tcp_seq_hash6;
+                        src = (const void *)ip6->ip6_src;
+                        dst = (const void *)ip6->ip6_dst;
                         if (sport > dport)
                                 rev = 1;
                         else if (sport == dport) {
                         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) {
                                         rev = 1;
                         }
                         if (rev) {
-                                memcpy(&tha.src, dst, sizeof ip6->ip6_dst);
-                                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 = ((u_int)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 */
+                                /* 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)
+                                                (*ndo->ndo_error)(ndo,
+                                                        S_ERR_ND_MEM_ALLOC,
+                                                        "%s: calloc", __func__);
+                                }
+                                th->addr = tha;
+                                if (rev)
+                                        th->ack = seq, th->seq = ack - 1;
+                                else
+                                        th->seq = seq, th->ack = ack - 1;
                         } else {
                         } else {
-                                memcpy(&tha.dst, dst, sizeof ip6->ip6_dst);
-                                memcpy(&tha.src, src, sizeof ip6->ip6_src);
-                                tha.port = sport << 16 | dport;
+                                if (rev)
+                                        seq -= th->ack, ack -= th->seq;
+                                else
+                                        seq -= th->seq, ack -= th->ack;
                         }
                         }
+
+                        thseq = th->seq;
+                        thack = th->ack;
                 } else {
                 } 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;
+                        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 (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) {
                                         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;
+                                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 {
                         } else {
-                                memcpy(&tha.dst, dst, sizeof ip->ip_dst);
-                                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;
                         }
                         }
-                }
-#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 */
+                                /* 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)
+                                                (*ndo->ndo_error)(ndo,
+                                                        S_ERR_ND_MEM_ALLOC,
+                                                        "%s: calloc", __func__);
+                                }
+                                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*/
         } else {
                 /*fool gcc*/
-                thseq = thack = threv = 0;
+                thseq = thack = rev = 0;
         }
         if (hlen > length) {
         }
         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. */
                 /* Check the checksum, if possible. */
-                u_int16_t sum, tcp_sum;
+                uint16_t sum, tcp_sum;
 
                 if (IP_V(ip) == 4) {
 
                 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)
                                 if (sum != 0)
-                                        (void)printf(" (incorrect -> 0x%04x)",
+                                        ND_PRINT(" (incorrect -> 0x%04x)",
                                             in_cksum_shouldbe(tcp_sum, sum));
                                 else
                                             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)
                                 if (sum != 0)
-                                        (void)printf(" (incorrect -> 0x%04x)",
+                                        ND_PRINT(" (incorrect -> 0x%04x)",
                                             in_cksum_shouldbe(tcp_sum, sum));
                                 else
                                             in_cksum_shouldbe(tcp_sum, sum));
                                 else
-                                        (void)printf(" (correct)");
+                                        ND_PRINT(" (correct)");
 
                         }
                 }
 
                         }
                 }
-#endif
         }
 
         length -= hlen;
         }
 
         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) {
 
                 if (length > 0) {
-                        (void)printf(":%u", seq + length);
+                        ND_PRINT(":%u", seq + length);
                 }
         }
 
                 }
         }
 
-        if (flags & TH_ACK) {
-                (void)printf(", ack %u", ack);
-        }
+        if (flags & TH_ACK)
+                ND_PRINT(", ack %u", ack);
+        else
+                if (ndo->ndo_vflag > 1 && ack != 0)
+                        ND_PRINT(", [ack %u != 0 while ACK flag not set]", ack);
 
 
-        (void)printf(", win %d", win);
+        ND_PRINT(", win %u", win);
 
         if (flags & TH_URG)
 
         if (flags & TH_URG)
-                (void)printf(", urg %d", urp);
+                ND_PRINT(", urg %u", urp);
+        else
+                if (ndo->ndo_vflag > 1 && urp != 0)
+                        ND_PRINT(", [urg %u != 0 while URG flag not set]", urp);
         /*
          * Handle any options.
          */
         if (hlen > sizeof(*tp)) {
         /*
          * 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);
 
                 hlen -= sizeof(*tp);
                 cp = (const u_char *)tp + sizeof(*tp);
-                printf(", options [");
-                while (hlen > 0) {
+                ND_PRINT(", options [");
+                while (hlen != 0) {
                         if (ch != '\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 {
                         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 */
                                 if (len < 2 || len > hlen)
                                         goto bad;
                                 --hlen;                /* account for length byte */
@@ -472,46 +467,46 @@ 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  */
                         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 Option %u", opt));
+                        ND_PRINT("%s", tok2str(tcp_option_values, "unknown-%u", opt));
 
                         switch (opt) {
 
                         case TCPOPT_MAXSEG:
                                 datalen = 2;
                                 LENCHECK(datalen);
 
                         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);
                                 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) {
                                 break;
 
                         case TCPOPT_SACK:
                                 datalen = len - 2;
                                 if (datalen % 8 != 0) {
-                                        (void)printf("malformed sack");
+                                        ND_PRINT(" invalid sack");
                                 } else {
                                 } 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);
                                         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);
                                                 LENCHECK(i + 8);
-                                                e = EXTRACT_32BITS(cp + i + 4);
-                                                if (threv) {
+                                                e = GET_BE_U_4(cp + i + 4);
+                                                if (rev) {
                                                         s -= thseq;
                                                         e -= thseq;
                                                 } else {
                                                         s -= thack;
                                                         e -= thack;
                                                 }
                                                         s -= thseq;
                                                         e -= thseq;
                                                 } else {
                                                         s -= thack;
                                                         e -= thack;
                                                 }
-                                                (void)printf("{%u:%u}", s, e);
+                                                ND_PRINT("{%u:%u}", s, e);
                                         }
                                 }
                                 break;
                                         }
                                 }
                                 break;
@@ -528,53 +523,79 @@ tcp_print(register const u_char *bp, register u_int length,
                                  */
                                 datalen = 4;
                                 LENCHECK(datalen);
                                  */
                                 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);
                                 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);
                                 break;
 
                         case TCPOPT_SIGNATURE:
                                 datalen = TCP_SIGLEN;
                                 LENCHECK(datalen);
+                                ND_TCHECK_LEN(cp, datalen);
+                                ND_PRINT(" ");
 #ifdef HAVE_LIBCRYPTO
 #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:
                                                              bp + TH_OFF(tp) * 4, length, cp)) {
 
                                 case SIGNATURE_VALID:
-                                        (void)printf("valid");
+                                        ND_PRINT("valid");
                                         break;
 
                                 case SIGNATURE_INVALID:
                                         break;
 
                                 case SIGNATURE_INVALID:
-                                        (void)printf("invalid");
+                                        nd_print_invalid(ndo);
                                         break;
 
                                 case CANT_CHECK_SIGNATURE:
                                         break;
 
                                 case CANT_CHECK_SIGNATURE:
-                                        (void)printf("can't check - ");
+                                        ND_PRINT("can't check - ");
                                         for (i = 0; i < TCP_SIGLEN; ++i)
                                         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)
                                         break;
                                 }
 #else
                                 for (i = 0; i < TCP_SIGLEN; ++i)
-                                        (void)printf("%02x", cp[i]);
+                                        ND_PRINT("%02x", GET_U_1(cp + i));
 #endif
                                 break;
 
 #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;
 
                                 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_EOL:
                         case TCPOPT_NOP:
@@ -588,27 +609,83 @@ tcp_print(register const u_char *bp, register u_int length,
                         case TCPOPT_UTO:
                                 datalen = 2;
                                 LENCHECK(datalen);
                         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;
                                 if (utoval & 0x0001)
                                         utoval = (utoval >> 1) * 60;
                                 else
                                         utoval >>= 1;
-                                (void)printf(" %u", utoval);
+                                ND_PRINT(" %u", utoval);
                                 break;
 
                         case TCPOPT_MPTCP:
                                 break;
 
                         case TCPOPT_MPTCP:
+                            {
+                                const u_char *snapend_save;
+                                int ret;
+
                                 datalen = len - 2;
                                 LENCHECK(datalen);
                                 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;
                                         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 = GET_BE_U_2(cp);
+                                ND_PRINT("-");
+
+                                switch(magic) {
+
+                                case 0xf989: /* TCP Fast Open RFC 7413 */
+                                        ND_PRINT("tfo");
+                                        print_tcp_fastopen_option(ndo, cp + 2, datalen - 2);
+                                        break;
+
+                                default:
+                                        /* Unknown magic number */
+                                        ND_PRINT("%04x", magic);
+                                        break;
+                                }
+                                break;
 
                         default:
                                 datalen = len - 2;
 
                         default:
                                 datalen = len - 2;
+                                if (datalen)
+                                        ND_PRINT(" 0x");
                                 for (i = 0; i < datalen; ++i) {
                                 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;
                         }
                                 }
                                 break;
                         }
@@ -618,88 +695,157 @@ tcp_print(register const u_char *bp, register u_int length,
                         hlen -= datalen;
 
                         /* Check specification against observed length */
                         hlen -= datalen;
 
                         /* Check specification against observed length */
-                        ++datalen;                     /* option octet */
+                        ++datalen;             /* option octet */
                         if (!ZEROLENOPT(opt))
                         if (!ZEROLENOPT(opt))
-                                ++datalen;             /* size octet */
+                                ++datalen;     /* size octet */
                         if (datalen != len)
                         if (datalen != len)
-                                (void)printf("[len %d]", len);
+                                ND_PRINT("[len %u]", len);
                         ch = ',';
                         if (opt == TCPOPT_EOL)
                                 break;
                 }
                         ch = ',';
                         if (opt == TCPOPT_EOL)
                                 break;
                 }
-                putchar(']');
+                ND_PRINT("]");
         }
 
         /*
          * Print length field before crawling down the stack.
          */
         }
 
         /*
          * Print length field before crawling down the stack.
          */
-        printf(", length %u", length);
+        ND_PRINT(", length %u", length);
 
 
-        if (length <= 0)
+        if (length == 0)
                 return;
 
         /*
          * Decode payload if necessary.
          */
                 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) {
+                if(ndo->ndo_vflag)
+                        print_tcp_rst_data(ndo, bp, length);
+                else
+                        ND_TCHECK_LEN(bp, length);
                 return;
                 return;
-        } 
+        }
 
 
-        if (packettype) {
-                switch (packettype) {
+        if (ndo->ndo_packettype) {
+                switch (ndo->ndo_packettype) {
                 case PT_ZMTP1:
                 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;
         }
 
                         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(FTP_PORT)) {
+                ND_PRINT(": ");
+                ftp_print(ndo, bp, length);
+        } else if (IS_SRC_OR_DST_PORT(SSH_PORT)) {
+                ssh_print(ndo, bp, length);
+        } else 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(": ");
+                whois_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(HTTP_PORT)) {
+                ND_PRINT(": ");
+                http_print(ndo, bp, length);
+#ifdef ENABLE_SMB
+        } else if (IS_SRC_OR_DST_PORT(NETBIOS_SSN_PORT)) {
+                nbt_tcp_print(ndo, bp, length);
+#endif
+        } else if (IS_SRC_OR_DST_PORT(BGP_PORT)) {
+                bgp_print(ndo, bp, length);
+        } else if (IS_SRC_OR_DST_PORT(RPKI_RTR_PORT)) {
+                rpki_rtr_print(ndo, bp, length);
+#ifdef ENABLE_SMB
+        } else if (IS_SRC_OR_DST_PORT(SMB_PORT)) {
+                smb_tcp_print(ndo, bp, length);
 #endif
 #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)) {
+        } else if (IS_SRC_OR_DST_PORT(RTSP_PORT)) {
+                ND_PRINT(": ");
+                rtsp_print(ndo, bp, length);
+        } else if (IS_SRC_OR_DST_PORT(MSDP_PORT)) {
+                msdp_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(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(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(HTTP_PORT_ALT)) {
+                ND_PRINT(": ");
+                http_print(ndo, bp, length);
+        } else if (IS_SRC_OR_DST_PORT(RTSP_PORT_ALT)) {
+                ND_PRINT(": ");
+                rtsp_print(ndo, bp, length);
+        } else if ((IS_SRC_OR_DST_PORT(NFS_PORT)) &&
+                 length >= 4) {
                 /*
                 /*
-                 * TCP DNS query has 2byte length at the head.
-                 * XXX packet could be unaligned, it can go strange
+                 * 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.
                  */
                  */
-                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);
+                uint32_t fraglen;
+                const struct sunrpc_msg *rp;
+                enum sunrpc_msg_type direction;
+
+                fraglen = GET_BE_U_4(bp) & 0x7FFFFFFF;
+                if (fraglen > (length) - 4)
+                        fraglen = (length) - 4;
+                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) {
+                                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) {
+                                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;
         }
 
         return;
- bad:
-        fputs("[bad opt]", stdout);
+bad:
+        ND_PRINT("[bad opt]");
         if (ch != '\0')
         if (ch != '\0')
-                putchar('>');
+                ND_PRINT("]");
         return;
         return;
- trunc:
-        fputs("[|tcp]", stdout);
-        if (ch != '\0')
-                putchar('>');
+invalid:
+        nd_print_invalid(ndo);
 }
 
 /*
 }
 
 /*
@@ -718,51 +864,65 @@ tcp_print(register const u_char *bp, register u_int length,
  */
 
 static void
  */
 
 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 */
         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
 }
 
 #ifdef HAVE_LIBCRYPTO
+DIAG_OFF_DEPRECATION
 static int
 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;
 {
         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;
 
 
         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);
         }
 
                 return (CANT_CHECK_SIGNATURE);
         }
 
@@ -771,33 +931,27 @@ 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) {
          * 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);
                 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) {
         } 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;
                 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;
                 nxt = IPPROTO_TCP;
-                MD5_Update(&ctx, (char *)&nxt, sizeof(nxt));
-#endif
+                MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
         } else {
         } 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);
         }
 
                 return (CANT_CHECK_SIGNATURE);
         }
 
@@ -805,10 +959,10 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
          * Step 2: Update MD5 hash with TCP header, excluding options.
          * The TCP checksum must be set to zero.
          */
          * 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 3: Update MD5 hash with TCP segment data, if present.
          */
@@ -817,7 +971,7 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
         /*
          * Step 4: Update MD5 hash with shared secret.
          */
         /*
          * 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)
         MD5_Final(sig, &ctx);
 
         if (memcmp(rcvsig, sig, TCP_SIGLEN) == 0)
@@ -825,11 +979,5 @@ tcp_verify_signature(const struct ip *ip, const struct tcphdr *tp,
         else
                 return (SIGNATURE_INVALID);
 }
         else
                 return (SIGNATURE_INVALID);
 }
+DIAG_ON_DEPRECATION
 #endif /* HAVE_LIBCRYPTO */
 #endif /* HAVE_LIBCRYPTO */
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
[mirror] the TCPdump network dissector