Clean up comments.

[tcpdump] / print-tcp.c

diff --git a/print-tcp.c b/print-tcp.c
index 4b605733ff483dc1577e63a8081b46bd80fba672..3310b9e9b2aafcbb071bc5070418c9d154af47a3 100644 (file)
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -68,8 +68,8 @@ static void print_tcp_fastopen_option(netdissect_options *ndo, const u_char *cp,
 
 
 struct tha {
 
 
 struct tha {

-        struct in_addr src;
-        struct in_addr dst;
+        nd_ipv4 src;
+        nd_ipv4 dst;

         u_int port;
 };
 
         u_int port;
 };
 


@@ -81,8 +81,8 @@ struct tcp_seq_hash {
 };
 
 struct tha6 {
 };
 
 struct tha6 {

-        struct in6_addr src;
-        struct in6_addr dst;
+        nd_ipv6 src;
+        nd_ipv6 dst;

         u_int port;
 };
 
         u_int port;
 };
 


@@ -95,7 +95,7 @@ struct tcp_seq_hash6 {
 
 #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)
 
 static struct tcp_seq_hash tcp_seq_hash4[TSEQ_HASHSIZE];
 #define ZEROLENOPT(o) ((o) == TCPOPT_EOL || (o) == TCPOPT_NOP)
 
 static struct tcp_seq_hash tcp_seq_hash4[TSEQ_HASHSIZE];


@@ -136,7 +136,7 @@ static const struct tok tcp_option_values[] = {
         { 0, NULL }
 };
 
         { 0, NULL }
 };
 

-static int
+static uint16_t

 tcp_cksum(netdissect_options *ndo,
           const struct ip *ip,
           const struct tcphdr *tp,
 tcp_cksum(netdissect_options *ndo,
           const struct ip *ip,
           const struct tcphdr *tp,


@@ -146,7 +146,7 @@ tcp_cksum(netdissect_options *ndo,
                                 IPPROTO_TCP);
 }
 
                                 IPPROTO_TCP);
 }
 

-static int
+static uint16_t

 tcp6_cksum(netdissect_options *ndo,
            const struct ip6_hdr *ip6,
            const struct tcphdr *tp,
 tcp6_cksum(netdissect_options *ndo,
            const struct ip6_hdr *ip6,
            const struct tcphdr *tp,


@@ -195,11 +195,11 @@ tcp_print(netdissect_options *ndo,
                 return;
         }
 
                 return;
         }
 

-        sport = EXTRACT_BE_U_2(tp->th_sport);
-        dport = EXTRACT_BE_U_2(tp->th_dport);
+        sport = GET_BE_U_2(tp->th_sport);
+        dport = GET_BE_U_2(tp->th_dport);

 
         if (ip6) {
 
         if (ip6) {

-                if (EXTRACT_U_1(ip6->ip6_nxt) == IPPROTO_TCP) {
+                if (GET_U_1(ip6->ip6_nxt) == IPPROTO_TCP) {

                         ND_PRINT("%s.%s > %s.%s: ",
                                  ip6addr_string(ndo, ip6->ip6_src),
                                  tcpport_string(ndo, sport),
                         ND_PRINT("%s.%s > %s.%s: ",
                                  ip6addr_string(ndo, ip6->ip6_src),
                                  tcpport_string(ndo, sport),


@@ -210,7 +210,7 @@ tcp_print(netdissect_options *ndo,
                                  tcpport_string(ndo, sport), tcpport_string(ndo, dport));
                 }
         } else {
                                  tcpport_string(ndo, sport), tcpport_string(ndo, dport));
                 }
         } else {

-                if (EXTRACT_U_1(ip->ip_p) == IPPROTO_TCP) {
+                if (GET_U_1(ip->ip_p) == IPPROTO_TCP) {

                         ND_PRINT("%s.%s > %s.%s: ",
                                  ipaddr_string(ndo, ip->ip_src),
                                  tcpport_string(ndo, sport),
                         ND_PRINT("%s.%s > %s.%s: ",
                                  ipaddr_string(ndo, ip->ip_src),
                                  tcpport_string(ndo, sport),


@@ -227,15 +227,15 @@ tcp_print(netdissect_options *ndo,
         hlen = TH_OFF(tp) * 4;
 
         if (hlen < sizeof(*tp)) {
         hlen = TH_OFF(tp) * 4;
 
         if (hlen < sizeof(*tp)) {

-                ND_PRINT(" tcp %u [bad hdr length %u - too short, < %lu]",
-                         length - hlen, hlen, (unsigned long)sizeof(*tp));
+                ND_PRINT(" tcp %u [bad hdr length %u - too short, < %zu]",
+                         length - hlen, hlen, sizeof(*tp));

                 return;
         }
 
                 return;
         }
 

-        seq = EXTRACT_BE_U_4(tp->th_seq);
-        ack = EXTRACT_BE_U_4(tp->th_ack);
-        win = EXTRACT_BE_U_2(tp->th_win);
-        urp = EXTRACT_BE_U_2(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 (ndo->ndo_qflag) {
                 ND_PRINT("tcp %u", length - hlen);
 
         if (ndo->ndo_qflag) {
                 ND_PRINT("tcp %u", length - hlen);


@@ -246,7 +246,7 @@ tcp_print(netdissect_options *ndo,
                 return;
         }
 
                 return;
         }
 

-        flags = EXTRACT_U_1(tp->th_flags);
+        flags = GET_U_1(tp->th_flags);

         ND_PRINT("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
 
         if (!ndo->ndo_Sflag && (flags & TH_ACK)) {
         ND_PRINT("Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags));
 
         if (!ndo->ndo_Sflag && (flags & TH_ACK)) {


@@ -390,7 +390,7 @@ tcp_print(netdissect_options *ndo,
                 if (IP_V(ip) == 4) {
                         if (ND_TTEST_LEN(tp->th_sport, length)) {
                                 sum = tcp_cksum(ndo, ip, tp, length);
                 if (IP_V(ip) == 4) {
                         if (ND_TTEST_LEN(tp->th_sport, length)) {
                                 sum = tcp_cksum(ndo, ip, tp, length);

-                                tcp_sum = EXTRACT_BE_U_2(tp->th_sum);
+                                tcp_sum = GET_BE_U_2(tp->th_sum);

 
                                 ND_PRINT(", cksum 0x%04x", tcp_sum);
                                 if (sum != 0)
 
                                 ND_PRINT(", cksum 0x%04x", tcp_sum);
                                 if (sum != 0)


@@ -399,10 +399,10 @@ tcp_print(netdissect_options *ndo,
                                 else
                                         ND_PRINT(" (correct)");
                         }
                                 else
                                         ND_PRINT(" (correct)");
                         }

-                } else if (IP_V(ip) == 6 && ip6->ip6_plen) {
+                } else if (IP_V(ip) == 6) {

                         if (ND_TTEST_LEN(tp->th_sport, length)) {
                                 sum = tcp6_cksum(ndo, ip6, tp, length);
                         if (ND_TTEST_LEN(tp->th_sport, length)) {
                                 sum = tcp6_cksum(ndo, ip6, tp, length);

-                                tcp_sum = EXTRACT_BE_U_2(tp->th_sum);
+                                tcp_sum = GET_BE_U_2(tp->th_sum);

 
                                 ND_PRINT(", cksum 0x%04x", tcp_sum);
                                 if (sum != 0)
 
                                 ND_PRINT(", cksum 0x%04x", tcp_sum);
                                 if (sum != 0)


@@ -447,13 +447,13 @@ tcp_print(netdissect_options *ndo,
                         if (ch != '\0')
                                 ND_PRINT("%c", ch);
                         ND_TCHECK_1(cp);
                         if (ch != '\0')
                                 ND_PRINT("%c", ch);
                         ND_TCHECK_1(cp);

-                        opt = EXTRACT_U_1(cp);
+                        opt = GET_U_1(cp);

                         cp++;
                         if (ZEROLENOPT(opt))
                                 len = 1;
                         else {
                                 ND_TCHECK_1(cp);
                         cp++;
                         if (ZEROLENOPT(opt))
                                 len = 1;
                         else {
                                 ND_TCHECK_1(cp);

-                                len = EXTRACT_U_1(cp);
+                                len = GET_U_1(cp);

                                 cp++;  /* total including type, len */
                                 if (len < 2 || len > hlen)
                                         goto bad;
                                 cp++;  /* total including type, len */
                                 if (len < 2 || len > hlen)
                                         goto bad;


@@ -473,13 +473,13 @@ tcp_print(netdissect_options *ndo,
                         case TCPOPT_MAXSEG:
                                 datalen = 2;
                                 LENCHECK(datalen);
                         case TCPOPT_MAXSEG:
                                 datalen = 2;
                                 LENCHECK(datalen);

-                                ND_PRINT(" %u", EXTRACT_BE_U_2(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);

-                                ND_PRINT(" %u", EXTRACT_U_1(cp));
+                                ND_PRINT(" %u", GET_U_1(cp));

                                 break;
 
                         case TCPOPT_SACK:
                                 break;
 
                         case TCPOPT_SACK:


@@ -492,9 +492,9 @@ tcp_print(netdissect_options *ndo,
                                         ND_PRINT(" %u ", datalen / 8);
                                         for (i = 0; i < datalen; i += 8) {
                                                 LENCHECK(i + 4);
                                         ND_PRINT(" %u ", datalen / 8);
                                         for (i = 0; i < datalen; i += 8) {
                                                 LENCHECK(i + 4);

-                                                s = EXTRACT_BE_U_4(cp + i);
+                                                s = GET_BE_U_4(cp + i);

                                                 LENCHECK(i + 8);
                                                 LENCHECK(i + 8);

-                                                e = EXTRACT_BE_U_4(cp + i + 4);
+                                                e = GET_BE_U_4(cp + i + 4);

                                                 if (rev) {
                                                         s -= thseq;
                                                         e -= thseq;
                                                 if (rev) {
                                                         s -= thseq;
                                                         e -= thseq;


@@ -519,15 +519,15 @@ tcp_print(netdissect_options *ndo,
                                  */
                                 datalen = 4;
                                 LENCHECK(datalen);
                                  */
                                 datalen = 4;
                                 LENCHECK(datalen);

-                                ND_PRINT(" %u", EXTRACT_BE_U_4(cp));
+                                ND_PRINT(" %u", GET_BE_U_4(cp));

                                 break;
 
                         case TCPOPT_TIMESTAMP:
                                 datalen = 8;
                                 LENCHECK(datalen);
                                 ND_PRINT(" val %u ecr %u",
                                 break;
 
                         case TCPOPT_TIMESTAMP:
                                 datalen = 8;
                                 LENCHECK(datalen);
                                 ND_PRINT(" val %u ecr %u",

-                                             EXTRACT_BE_U_4(cp),
-                                             EXTRACT_BE_U_4(cp + 4));
+                                             GET_BE_U_4(cp),
+                                             GET_BE_U_4(cp + 4));

                                 break;
 
                         case TCPOPT_SIGNATURE:
                                 break;
 
                         case TCPOPT_SIGNATURE:


@@ -543,25 +543,27 @@ tcp_print(netdissect_options *ndo,
                                         break;
 
                                 case SIGNATURE_INVALID:
                                         break;
 
                                 case SIGNATURE_INVALID:

-                                        ND_PRINT("invalid");
+                                        nd_print_invalid(ndo);

                                         break;
 
                                 case CANT_CHECK_SIGNATURE:
                                         ND_PRINT("can't check - ");
                                         for (i = 0; i < TCP_SIGLEN; ++i)
                                         break;
 
                                 case CANT_CHECK_SIGNATURE:
                                         ND_PRINT("can't check - ");
                                         for (i = 0; i < TCP_SIGLEN; ++i)

-                                                ND_PRINT("%02x", EXTRACT_U_1(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)

-                                        ND_PRINT("%02x", EXTRACT_U_1(cp + i));
+                                        ND_PRINT("%02x", GET_U_1(cp + i));

 #endif
                                 break;
 
                         case TCPOPT_SCPS:
                                 datalen = 2;
                                 LENCHECK(datalen);
 #endif
                                 break;
 
                         case TCPOPT_SCPS:
                                 datalen = 2;
                                 LENCHECK(datalen);

-                                ND_PRINT(" cap %02x id %u", EXTRACT_U_1(cp), EXTRACT_U_1(cp + 1));
+                                ND_PRINT(" cap %02x id %u", GET_U_1(cp),
+                                         GET_U_1(cp + 1));

                                 break;
 
                         case TCPOPT_TCPAO:
                                 break;
 
                         case TCPOPT_TCPAO:


@@ -572,17 +574,19 @@ tcp_print(netdissect_options *ndo,
                                  * at this point.)
                                  */
                                 if (datalen < 2) {
                                  * at this point.)
                                  */
                                 if (datalen < 2) {

-                                        ND_PRINT(" invalid");
+                                        nd_print_invalid(ndo);

                                 } else {
                                         LENCHECK(1);
                                 } else {
                                         LENCHECK(1);

-                                        ND_PRINT(" keyid %u", EXTRACT_U_1(cp));
+                                        ND_PRINT(" keyid %u", GET_U_1(cp));

                                         LENCHECK(2);
                                         LENCHECK(2);

-                                        ND_PRINT(" rnextkeyid %u", EXTRACT_U_1(cp + 1));
+                                        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);
                                         if (datalen > 2) {
                                                 ND_PRINT(" mac 0x");
                                                 for (i = 2; i < datalen; i++) {
                                                         LENCHECK(i + 1);

-                                                        ND_PRINT("%02x", EXTRACT_U_1(cp + i));
+                                                        ND_PRINT("%02x",
+                                                                 GET_U_1(cp + i));

                                                 }
                                         }
                                 }
                                                 }
                                         }
                                 }


@@ -600,7 +604,7 @@ tcp_print(netdissect_options *ndo,
                         case TCPOPT_UTO:
                                 datalen = 2;
                                 LENCHECK(datalen);
                         case TCPOPT_UTO:
                                 datalen = 2;
                                 LENCHECK(datalen);

-                                utoval = EXTRACT_BE_U_2(cp);
+                                utoval = GET_BE_U_2(cp);

                                 ND_PRINT(" 0x%x", utoval);
                                 if (utoval & 0x0001)
                                         utoval = (utoval >> 1) * 60;
                                 ND_PRINT(" 0x%x", utoval);
                                 if (utoval & 0x0001)
                                         utoval = (utoval >> 1) * 60;


@@ -629,7 +633,7 @@ tcp_print(netdissect_options *ndo,
                                 if (datalen < 2)
                                         goto bad;
                                 /* RFC6994 */
                                 if (datalen < 2)
                                         goto bad;
                                 /* RFC6994 */

-                                magic = EXTRACT_BE_U_2(cp);
+                                magic = GET_BE_U_2(cp);

                                 ND_PRINT("-");
 
                                 switch(magic) {
                                 ND_PRINT("-");
 
                                 switch(magic) {


@@ -651,7 +655,7 @@ tcp_print(netdissect_options *ndo,
                                         ND_PRINT(" 0x");
                                 for (i = 0; i < datalen; ++i) {
                                         LENCHECK(i + 1);
                                         ND_PRINT(" 0x");
                                 for (i = 0; i < datalen; ++i) {
                                         LENCHECK(i + 1);

-                                        ND_PRINT("%02x", EXTRACT_U_1(cp + i));
+                                        ND_PRINT("%02x", GET_U_1(cp + i));

                                 }
                                 break;
                         }
                                 }
                                 break;
                         }


@@ -709,13 +713,16 @@ tcp_print(netdissect_options *ndo,
                 smtp_print(ndo, bp, length);
         } else if (IS_SRC_OR_DST_PORT(WHOIS_PORT)) {
                 ND_PRINT(": ");
                 smtp_print(ndo, bp, length);
         } else if (IS_SRC_OR_DST_PORT(WHOIS_PORT)) {
                 ND_PRINT(": ");

-                txtproto_print(ndo, bp, length, "whois", NULL, 0); /* RFC 3912 */
+                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(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);
 #ifdef ENABLE_SMB
         else if (IS_SRC_OR_DST_PORT(NETBIOS_SSN_PORT))
                 nbt_tcp_print(ndo, bp, length);


@@ -768,21 +775,21 @@ tcp_print(netdissect_options *ndo,
                 const struct sunrpc_msg *rp;
                 enum sunrpc_msg_type direction;
 
                 const struct sunrpc_msg *rp;
                 enum sunrpc_msg_type direction;
 

-                fraglen = EXTRACT_BE_U_4(bp) & 0x7FFFFFFF;
+                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)) {
                 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) EXTRACT_BE_U_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 ",
                         if (dport == NFS_PORT && direction == SUNRPC_CALL) {
                                 ND_PRINT(": NFS request xid %u ",

-                                         EXTRACT_BE_U_4(rp->rm_xid));
+                                         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 ",
                                 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 ",

-                                         EXTRACT_BE_U_4(rp->rm_xid));
+                                         GET_BE_U_4(rp->rm_xid));

                                 nfsreply_noaddr_print(ndo, (const u_char *)rp, fraglen, (const u_char *)ip);
                                 return;
                         }
                                 nfsreply_noaddr_print(ndo, (const u_char *)rp, fraglen, (const u_char *)ip);
                                 return;
                         }


@@ -820,7 +827,7 @@ static void
 print_tcp_rst_data(netdissect_options *ndo,
                    const u_char *sp, u_int length)
 {
 print_tcp_rst_data(netdissect_options *ndo,
                    const u_char *sp, u_int length)
 {

-        int c;
+        u_char c;

 
         ND_PRINT(ND_TTEST_LEN(sp, length) ? " [RST" : " [!RST");
         if (length > MAX_RST_DATA_LEN) {
 
         ND_PRINT(ND_TTEST_LEN(sp, length) ? " [RST" : " [!RST");
         if (length > MAX_RST_DATA_LEN) {


@@ -828,10 +835,11 @@ print_tcp_rst_data(netdissect_options *ndo,
                 ND_PRINT("+");                 /* indicate we truncate */
         }
         ND_PRINT(" ");
                 ND_PRINT("+");                 /* indicate we truncate */
         }
         ND_PRINT(" ");

-        while (length-- && sp < ndo->ndo_snapend) {
-                c = EXTRACT_U_1(sp);
+        while (length && sp < ndo->ndo_snapend) {
+                c = GET_U_1(sp);

                 sp++;
                 fn_print_char(ndo, c);
                 sp++;
                 fn_print_char(ndo, c);

+                length--;

         }
         ND_PRINT("]");
 }
         }
         ND_PRINT("]");
 }


@@ -851,11 +859,11 @@ print_tcp_fastopen_option(netdissect_options *ndo, const u_char *cp,
         } else {
                 /* Fast Open Cookie */
                 if (datalen % 2 != 0 || datalen < 4 || datalen > 16) {
         } else {
                 /* Fast Open Cookie */
                 if (datalen % 2 != 0 || datalen < 4 || datalen > 16) {

-                        ND_PRINT(" invalid");
+                        nd_print_invalid(ndo);

                 } else {
                         ND_PRINT(" cookie ");
                         for (i = 0; i < datalen; ++i)
                 } else {
                         ND_PRINT(" cookie ");
                         for (i = 0; i < datalen; ++i)

-                                ND_PRINT("%02x", EXTRACT_U_1(cp + i));
+                                ND_PRINT("%02x", GET_U_1(cp + i));

                 }
         }
 }
                 }
         }
 }


@@ -897,14 +905,14 @@ tcp_verify_signature(netdissect_options *ndo,
                 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));
                 MD5_Update(&ctx, (const char *)&ip->ip_dst, sizeof(ip->ip_dst));
                 MD5_Update(&ctx, (const char *)&zero_proto, sizeof(zero_proto));
                 MD5_Update(&ctx, (const char *)&ip->ip_p, sizeof(ip->ip_p));

-                tlen = EXTRACT_BE_U_2(ip->ip_len) - IP_HL(ip) * 4;
+                tlen = GET_BE_U_2(ip->ip_len) - IP_HL(ip) * 4;

                 tlen = htons(tlen);
                 MD5_Update(&ctx, (const char *)&tlen, sizeof(tlen));
         } else if (IP_V(ip) == 6) {
                 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));
                 tlen = htons(tlen);
                 MD5_Update(&ctx, (const char *)&tlen, sizeof(tlen));
         } else if (IP_V(ip) == 6) {
                 ip6 = (const struct ip6_hdr *)ip;
                 MD5_Update(&ctx, (const char *)&ip6->ip6_src, sizeof(ip6->ip6_src));
                 MD5_Update(&ctx, (const char *)&ip6->ip6_dst, sizeof(ip6->ip6_dst));

-                len32 = htonl(EXTRACT_BE_U_2(ip6->ip6_plen));
+                len32 = htonl(GET_BE_U_2(ip6->ip6_plen));

                 MD5_Update(&ctx, (const char *)&len32, sizeof(len32));
                 nxt = 0;
                 MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));
                 MD5_Update(&ctx, (const char *)&len32, sizeof(len32));
                 nxt = 0;
                 MD5_Update(&ctx, (const char *)&nxt, sizeof(nxt));