+ printf("%s", tok2str(tcp_option_values, "Unknown Option %u", opt));
+
+ switch (opt) {
+
+ case TCPOPT_MAXSEG:
+ datalen = 2;
+ LENCHECK(datalen);
+ (void)printf(" %u", EXTRACT_16BITS(cp));
+ break;
+
+ case TCPOPT_WSCALE:
+ datalen = 1;
+ LENCHECK(datalen);
+ (void)printf(" %u", *cp);
+ break;
+
+ case TCPOPT_SACK:
+ datalen = len - 2;
+ if (datalen % 8 != 0) {
+ (void)printf("malformed sack");
+ } else {
+ u_int32_t s, e;
+
+ (void)printf(" %d ", datalen / 8);
+ for (i = 0; i < datalen; i += 8) {
+ LENCHECK(i + 4);
+ s = EXTRACT_32BITS(cp + i);
+ LENCHECK(i + 8);
+ e = EXTRACT_32BITS(cp + i + 4);
+ if (threv) {
+ s -= thseq;
+ e -= thseq;
+ } else {
+ s -= thack;
+ e -= thack;
+ }
+ (void)printf("{%u:%u}", s, e);
+ }
+ }
+ break;
+
+ case TCPOPT_CC:
+ case TCPOPT_CCNEW:
+ case TCPOPT_CCECHO:
+ case TCPOPT_ECHO:
+ case TCPOPT_ECHOREPLY:
+
+ /*
+ * those options share their semantics.
+ * fall through
+ */
+ datalen = 4;
+ LENCHECK(datalen);
+ (void)printf(" %u", EXTRACT_32BITS(cp));
+ break;
+
+ case TCPOPT_TIMESTAMP:
+ datalen = 8;
+ LENCHECK(datalen);
+ (void)printf(" val %u ecr %u",
+ EXTRACT_32BITS(cp),
+ EXTRACT_32BITS(cp + 4));
+ break;
+
+ case TCPOPT_SIGNATURE:
+ datalen = TCP_SIGLEN;
+ LENCHECK(datalen);
+#ifdef HAVE_LIBCRYPTO
+ switch (tcp_verify_signature(ip, tp,
+ bp + TH_OFF(tp) * 4, length, cp)) {
+
+ case SIGNATURE_VALID:
+ (void)printf("valid");
+ break;
+
+ case SIGNATURE_INVALID:
+ (void)printf("invalid");
+ break;
+
+ case CANT_CHECK_SIGNATURE:
+ (void)printf("can't check - ");
+ for (i = 0; i < TCP_SIGLEN; ++i)
+ (void)printf("%02x", cp[i]);
+ break;
+ }
+#else
+ for (i = 0; i < TCP_SIGLEN; ++i)
+ (void)printf("%02x", cp[i]);
+#endif
+ break;
+
+ case TCPOPT_AUTH:
+ (void)printf("keyid %d", *cp++);
+ datalen = len - 3;
+ for (i = 0; i < datalen; ++i) {
+ LENCHECK(i);
+ (void)printf("%02x", cp[i]);
+ }
+ 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;
+
+ default:
+ datalen = len - 2;
+ 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 (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);
projects / tcpdump / blobdiff