+ 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]);
+ }
+ break;
+
+
+ case TCPOPT_EOL:
+ case TCPOPT_NOP:
+ case TCPOPT_SACKOK:
+ /*
+ * Nothing interesting.
+ * fall through
+ */
+ break;
+
+ case TCPOPT_UTO:
+ datalen = 2;
+ LENCHECK(datalen);
+ utoval = EXTRACT_16BITS(cp);
+ (void)printf("0x%x", utoval);
+ if (utoval & 0x0001)
+ utoval = (utoval >> 1) * 60;
+ else
+ utoval >>= 1;
+ (void)printf(" %u", utoval);
+ break;
+
+ case TCPOPT_MPTCP:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (!mptcp_print(cp-2, len, flags))
+ goto bad;
+ break;
+
+ case TCPOPT_EXPERIMENT2:
+ datalen = len - 2;
+ LENCHECK(datalen);
+ if (datalen < 2)
+ goto bad;
+ /* RFC6994 */
+ magic = EXTRACT_16BITS(cp);
+ (void)printf("-");
+
+ switch(magic) {
+
+ case 0xf989:
+ /* TCP Fast Open: draft-ietf-tcpm-fastopen-04 */
+ if (datalen == 2) {
+ /* Fast Open Cookie Request */
+ (void)printf("tfo cookiereq");
+ } else {
+ /* Fast Open Cookie */
+ if (datalen % 2 != 0 || datalen < 6 || datalen > 18) {
+ (void)printf("tfo malformed");
+ } else {
+ (void)printf("tfo cookie ");
+ for (i = 2; i < datalen; ++i)
+ (void)printf("%02x", cp[i]);
+ }
+ }
+ break;
+
+ default:
+ /* Unknown magic number */
+ (void)printf("%04x", magic);
+ break;
+ }
+ break;
+
+ default:
+ datalen = len - 2;
+ if (datalen)
+ printf(" 0x");
+ for (i = 0; i < datalen; ++i) {
+ LENCHECK(i);
+ (void)printf("%02x", cp[i]);
+ }
+ break;
+ }
+
+ /* Account for data printed */
+ cp += datalen;
+ hlen -= datalen;
+
+ /* Check specification against observed length */
+ ++datalen; /* option octet */
+ if (!ZEROLENOPT(opt))
+ ++datalen; /* size octet */
+ if (datalen != len)
+ (void)printf("[len %d]", len);
+ ch = ',';
+ if (opt == TCPOPT_EOL)
+ break;
+ }
+ putchar(']');
+ }
+
+ /*
+ * Print length field before crawling down the stack.
+ */
+ printf(", length %u", length);
+
+ if (length <= 0)
+ return;
+
+ /*
+ * Decode payload if necessary.
+ */
+ bp += TH_OFF(tp) * 4;
+ if ((flags & TH_RST) && vflag) {
+ print_tcp_rst_data(bp, length);
+ return;
+ }
+
+ if (packettype) {
+ switch (packettype) {
+ case PT_ZMTP1:
+ zmtp1_print(gndo, bp, length);
+ break;
+ }
+ return;
+ }
+
+ if (sport == TELNET_PORT || dport == TELNET_PORT) {
+ if (!qflag && vflag)
+ telnet_print(bp, length);
+ } else if (sport == BGP_PORT || dport == BGP_PORT)
+ bgp_print(bp, length);
+ else if (sport == PPTP_PORT || dport == PPTP_PORT)
+ pptp_print(bp);
+#ifdef TCPDUMP_DO_SMB
+ else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT)
+ nbt_tcp_print(bp, length);
+ else if (sport == SMB_PORT || dport == SMB_PORT)
+ smb_tcp_print(bp, length);
+#endif
+ else if (sport == BEEP_PORT || dport == BEEP_PORT)
+ beep_print(gndo, bp, length);
+ else if (sport == OPENFLOW_PORT || dport == OPENFLOW_PORT)
+ openflow_print(bp, length);
+ else if (length > 2 &&
+ (sport == NAMESERVER_PORT || dport == NAMESERVER_PORT ||
+ sport == MULTICASTDNS_PORT || dport == MULTICASTDNS_PORT)) {
+ /*
+ * TCP DNS query has 2byte length at the head.
+ * XXX packet could be unaligned, it can go strange
+ */
+ ns_print(bp + 2, length - 2, 0);
+ } else if (sport == MSDP_PORT || dport == MSDP_PORT) {
+ msdp_print(gndo, bp, length);
+ } else if (sport == RPKI_RTR_PORT || dport == RPKI_RTR_PORT) {
+ rpki_rtr_print(bp, length);
+ }
+ else if (length > 0 && (sport == LDP_PORT || dport == LDP_PORT)) {
+ ldp_print(bp, length);
+ }
+ else if ((sport == NFS_PORT || dport == NFS_PORT) &&
+ length >= 4 && TTEST2(*bp, 4)) {
+ /*
+ * If data present, header length valid, and NFS port used,
+ * assume NFS.
+ * Pass offset of data plus 4 bytes for RPC TCP msg length
+ * to NFS print routines.
+ */
+ u_int32_t fraglen;
+ register struct sunrpc_msg *rp;
+ enum sunrpc_msg_type direction;
+
+ fraglen = EXTRACT_32BITS(bp) & 0x7FFFFFFF;
+ if (fraglen > (length) - 4)
+ fraglen = (length) - 4;
+ rp = (struct sunrpc_msg *)(bp + 4);
+ if (TTEST(rp->rm_direction)) {
+ direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction);
+ if (dport == NFS_PORT && direction == SUNRPC_CALL) {
+ (void)printf(": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid));
+ nfsreq_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ return;
+ }
+ if (sport == NFS_PORT && direction == SUNRPC_REPLY) {
+ (void)printf(": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid));
+ nfsreply_print_noaddr((u_char *)rp, fraglen, (u_char *)ip);
+ return;
+ }
+ }
+ }
+
+ return;
+ bad:
+ fputs("[bad opt]", stdout);
+ if (ch != '\0')
+ putchar('>');
+ return;
+ trunc:
+ fputs("[|tcp]", stdout);
+ if (ch != '\0')
+ putchar('>');
projects / tcpdump / blobdiff