153f17a9db278d33517d9888dd77848f554522a38JP Abgrall/* $NetBSD: print-tcp.c,v 1.9 2007/07/26 18:15:12 plunky Exp $ */ 253f17a9db278d33517d9888dd77848f554522a38JP Abgrall 32949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 42949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 52949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * The Regents of the University of California. All rights reserved. 62949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 72949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Copyright (c) 1999-2004 The tcpdump.org project 82949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 92949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Redistribution and use in source and binary forms, with or without 102949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * modification, are permitted provided that: (1) source code distributions 112949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * retain the above copyright notice and this paragraph in its entirety, (2) 122949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * distributions including binary code include the above copyright notice and 132949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * this paragraph in its entirety in the documentation or other materials 142949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * provided with the distribution, and (3) all advertising materials mentioning 152949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * features or use of this software display the following acknowledgement: 162949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ``This product includes software developed by the University of California, 172949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 182949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * the University nor the names of its contributors may be used to endorse 192949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * or promote products derived from this software without specific prior 202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * written permission. 212949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 222949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 232949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 242949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 252949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 262949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifndef lint 2753f17a9db278d33517d9888dd77848f554522a38JP Abgrall#else 2853f17a9db278d33517d9888dd77848f554522a38JP Abgrall__RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $"); 292949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 302949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 31892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes#define NETDISSECT_REWORKED 322949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef HAVE_CONFIG_H 332949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "config.h" 342949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 352949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 362949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <tcpdump-stdinc.h> 372949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 382949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <stdlib.h> 392949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <string.h> 402949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 412949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "interface.h" 422949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "addrtoname.h" 432949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "extract.h" 442949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 452949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "tcp.h" 462949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 472949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "ip.h" 482949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 492949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "ip6.h" 502949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 512949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "ipproto.h" 522949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "rpc_auth.h" 532949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "rpc_msg.h" 542949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 552949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include "nameser.h" 562949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 572949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef HAVE_LIBCRYPTO 582949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#include <openssl/md5.h> 5953f17a9db278d33517d9888dd77848f554522a38JP Abgrall#include <signature.h> 602949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 61892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughesstatic int tcp_verify_signature(netdissect_options *ndo, 62892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes const struct ip *ip, const struct tcphdr *tp, 6353f17a9db278d33517d9888dd77848f554522a38JP Abgrall const u_char *data, int length, const u_char *rcvsig); 642949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 652949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 66892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughesstatic void print_tcp_rst_data(netdissect_options *, register const u_char *sp, u_int length); 672949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 682949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define MAX_RST_DATA_LEN 30 692949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 702949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 712949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstruct tha { 7253f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct in_addr src; 7353f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct in_addr dst; 7453f17a9db278d33517d9888dd77848f554522a38JP Abgrall u_int port; 752949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project}; 762949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 772949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstruct tcp_seq_hash { 7853f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tcp_seq_hash *nxt; 7953f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tha addr; 8053f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq seq; 8153f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq ack; 8253f17a9db278d33517d9888dd77848f554522a38JP Abgrall}; 8353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 8453f17a9db278d33517d9888dd77848f554522a38JP Abgrall#ifdef INET6 8553f17a9db278d33517d9888dd77848f554522a38JP Abgrallstruct tha6 { 8653f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct in6_addr src; 8753f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct in6_addr dst; 8853f17a9db278d33517d9888dd77848f554522a38JP Abgrall u_int port; 892949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project}; 902949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 9153f17a9db278d33517d9888dd77848f554522a38JP Abgrallstruct tcp_seq_hash6 { 9253f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tcp_seq_hash6 *nxt; 9353f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tha6 addr; 9453f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq seq; 9553f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq ack; 9653f17a9db278d33517d9888dd77848f554522a38JP Abgrall}; 9753f17a9db278d33517d9888dd77848f554522a38JP Abgrall#endif 9853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 992949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define TSEQ_HASHSIZE 919 1002949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 1012949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* These tcp optinos do not have the size octet */ 1022949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#define ZEROLENOPT(o) ((o) == TCPOPT_EOL || (o) == TCPOPT_NOP) 1032949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 10453f17a9db278d33517d9888dd77848f554522a38JP Abgrallstatic struct tcp_seq_hash tcp_seq_hash4[TSEQ_HASHSIZE]; 10553f17a9db278d33517d9888dd77848f554522a38JP Abgrall#ifdef INET6 10653f17a9db278d33517d9888dd77848f554522a38JP Abgrallstatic struct tcp_seq_hash6 tcp_seq_hash6[TSEQ_HASHSIZE]; 10753f17a9db278d33517d9888dd77848f554522a38JP Abgrall#endif 1082949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 10953f17a9db278d33517d9888dd77848f554522a38JP Abgrallstatic const struct tok tcp_flag_values[] = { 11053f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_FIN, "F" }, 11153f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_SYN, "S" }, 11253f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_RST, "R" }, 11353f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_PUSH, "P" }, 11453f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_ACK, "." }, 11553f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_URG, "U" }, 11653f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_ECNECHO, "E" }, 11753f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TH_CWR, "W" }, 11853f17a9db278d33517d9888dd77848f554522a38JP Abgrall { 0, NULL } 11953f17a9db278d33517d9888dd77848f554522a38JP Abgrall}; 1202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 12153f17a9db278d33517d9888dd77848f554522a38JP Abgrallstatic const struct tok tcp_option_values[] = { 12253f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_EOL, "eol" }, 12353f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_NOP, "nop" }, 12453f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_MAXSEG, "mss" }, 12553f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_WSCALE, "wscale" }, 12653f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_SACKOK, "sackOK" }, 12753f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_SACK, "sack" }, 12853f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_ECHO, "echo" }, 12953f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_ECHOREPLY, "echoreply" }, 13053f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_TIMESTAMP, "TS" }, 13153f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_CC, "cc" }, 13253f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_CCNEW, "ccnew" }, 13353f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_CCECHO, "" }, 13453f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_SIGNATURE, "md5" }, 13553f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_AUTH, "enhanced auth" }, 13653f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_UTO, "uto" }, 13753f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_MPTCP, "mptcp" }, 13853f17a9db278d33517d9888dd77848f554522a38JP Abgrall { TCPOPT_EXPERIMENT2, "exp" }, 13953f17a9db278d33517d9888dd77848f554522a38JP Abgrall { 0, NULL } 14053f17a9db278d33517d9888dd77848f554522a38JP Abgrall}; 1412949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 142892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughesstatic int 143892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughestcp_cksum(netdissect_options *ndo, 144892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register const struct ip *ip, 145892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register const struct tcphdr *tp, 146892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register u_int len) 1472949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project{ 148892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes return nextproto4_cksum(ndo, ip, (const uint8_t *)tp, len, len, 149892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes IPPROTO_TCP); 1502949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project} 1512949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 1522949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectvoid 153892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughestcp_print(netdissect_options *ndo, 154892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register const u_char *bp, register u_int length, 155892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register const u_char *bp2, int fragmented) 1562949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project{ 15753f17a9db278d33517d9888dd77848f554522a38JP Abgrall register const struct tcphdr *tp; 15853f17a9db278d33517d9888dd77848f554522a38JP Abgrall register const struct ip *ip; 15953f17a9db278d33517d9888dd77848f554522a38JP Abgrall register u_char flags; 16053f17a9db278d33517d9888dd77848f554522a38JP Abgrall register u_int hlen; 16153f17a9db278d33517d9888dd77848f554522a38JP Abgrall register char ch; 162892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint16_t sport, dport, win, urp; 163892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint32_t seq, ack, thseq, thack; 16453f17a9db278d33517d9888dd77848f554522a38JP Abgrall u_int utoval; 165892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint16_t magic; 16653f17a9db278d33517d9888dd77848f554522a38JP Abgrall register int rev; 1672949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 16853f17a9db278d33517d9888dd77848f554522a38JP Abgrall register const struct ip6_hdr *ip6; 1692949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 1702949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 17153f17a9db278d33517d9888dd77848f554522a38JP Abgrall tp = (struct tcphdr *)bp; 17253f17a9db278d33517d9888dd77848f554522a38JP Abgrall ip = (struct ip *)bp2; 1732949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 17453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (IP_V(ip) == 6) 17553f17a9db278d33517d9888dd77848f554522a38JP Abgrall ip6 = (struct ip6_hdr *)bp2; 17653f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 17753f17a9db278d33517d9888dd77848f554522a38JP Abgrall ip6 = NULL; 1782949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif /*INET6*/ 17953f17a9db278d33517d9888dd77848f554522a38JP Abgrall ch = '\0'; 180892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (!ND_TTEST(tp->th_dport)) { 181892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s > %s: [|tcp]", 182892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ipaddr_string(ndo, &ip->ip_src), 183892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ipaddr_string(ndo, &ip->ip_dst))); 18453f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 18553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 1862949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 18753f17a9db278d33517d9888dd77848f554522a38JP Abgrall sport = EXTRACT_16BITS(&tp->th_sport); 18853f17a9db278d33517d9888dd77848f554522a38JP Abgrall dport = EXTRACT_16BITS(&tp->th_dport); 1892949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 19053f17a9db278d33517d9888dd77848f554522a38JP Abgrall hlen = TH_OFF(tp) * 4; 1912949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 1922949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 19353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ip6) { 19453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ip6->ip6_nxt == IPPROTO_TCP) { 195892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s.%s > %s.%s: ", 196892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ip6addr_string(ndo, &ip6->ip6_src), 19753f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcpport_string(sport), 198892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ip6addr_string(ndo, &ip6->ip6_dst), 199892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes tcpport_string(dport))); 20053f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 201892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s > %s: ", 202892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes tcpport_string(sport), tcpport_string(dport))); 20353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 20453f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else 20553f17a9db278d33517d9888dd77848f554522a38JP Abgrall#endif /*INET6*/ 20653f17a9db278d33517d9888dd77848f554522a38JP Abgrall { 20753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ip->ip_p == IPPROTO_TCP) { 208892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s.%s > %s.%s: ", 209892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ipaddr_string(ndo, &ip->ip_src), 21053f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcpport_string(sport), 211892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ipaddr_string(ndo, &ip->ip_dst), 212892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes tcpport_string(dport))); 21353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 214892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s > %s: ", 215892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes tcpport_string(sport), tcpport_string(dport))); 21653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 21753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 21853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 21953f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (hlen < sizeof(*tp)) { 220892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " tcp %d [bad hdr length %u - too short, < %lu]", 221892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes length - hlen, hlen, (unsigned long)sizeof(*tp))); 22253f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 22353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 22453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 225892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_TCHECK(*tp); 22653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 22753f17a9db278d33517d9888dd77848f554522a38JP Abgrall seq = EXTRACT_32BITS(&tp->th_seq); 22853f17a9db278d33517d9888dd77848f554522a38JP Abgrall ack = EXTRACT_32BITS(&tp->th_ack); 22953f17a9db278d33517d9888dd77848f554522a38JP Abgrall win = EXTRACT_16BITS(&tp->th_win); 23053f17a9db278d33517d9888dd77848f554522a38JP Abgrall urp = EXTRACT_16BITS(&tp->th_urp); 23153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 232892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ndo->ndo_qflag) { 233892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "tcp %d", length - hlen)); 23453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (hlen > length) { 235892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]", 236892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes hlen, length)); 23753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 23853f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 23953f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 24053f17a9db278d33517d9888dd77848f554522a38JP Abgrall 24153f17a9db278d33517d9888dd77848f554522a38JP Abgrall flags = tp->th_flags; 242892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "Flags [%s]", bittok2str_nosep(tcp_flag_values, "none", flags))); 24353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 244892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (!ndo->ndo_Sflag && (flags & TH_ACK)) { 24553f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 24653f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Find (or record) the initial sequence numbers for 24753f17a9db278d33517d9888dd77848f554522a38JP Abgrall * this conversation. (we pick an arbitrary 24853f17a9db278d33517d9888dd77848f554522a38JP Abgrall * collating order so there's only one entry for 24953f17a9db278d33517d9888dd77848f554522a38JP Abgrall * both directions). 25053f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 25153f17a9db278d33517d9888dd77848f554522a38JP Abgrall rev = 0; 2522949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 25353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ip6) { 25453f17a9db278d33517d9888dd77848f554522a38JP Abgrall register struct tcp_seq_hash6 *th; 25553f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tcp_seq_hash6 *tcp_seq_hash; 25653f17a9db278d33517d9888dd77848f554522a38JP Abgrall const struct in6_addr *src, *dst; 25753f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tha6 tha; 25853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 25953f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq_hash = tcp_seq_hash6; 26053f17a9db278d33517d9888dd77848f554522a38JP Abgrall src = &ip6->ip6_src; 26153f17a9db278d33517d9888dd77848f554522a38JP Abgrall dst = &ip6->ip6_dst; 26253f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sport > dport) 26353f17a9db278d33517d9888dd77848f554522a38JP Abgrall rev = 1; 26453f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == dport) { 26553f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (UNALIGNED_MEMCMP(src, dst, sizeof ip6->ip6_dst) > 0) 26653f17a9db278d33517d9888dd77848f554522a38JP Abgrall rev = 1; 26753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 26853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) { 26953f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip6->ip6_dst); 27053f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.dst, src, sizeof ip6->ip6_src); 27153f17a9db278d33517d9888dd77848f554522a38JP Abgrall tha.port = dport << 16 | sport; 27253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 27353f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip6->ip6_dst); 27453f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.src, src, sizeof ip6->ip6_src); 27553f17a9db278d33517d9888dd77848f554522a38JP Abgrall tha.port = sport << 16 | dport; 27653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 27753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 27853f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE]; 27953f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->nxt; th = th->nxt) 28053f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (memcmp((char *)&tha, (char *)&th->addr, 28153f17a9db278d33517d9888dd77848f554522a38JP Abgrall sizeof(th->addr)) == 0) 28253f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 28353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 28453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (!th->nxt || (flags & TH_SYN)) { 28553f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* didn't find it or new conversation */ 28653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (th->nxt == NULL) { 28753f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->nxt = (struct tcp_seq_hash6 *) 28853f17a9db278d33517d9888dd77848f554522a38JP Abgrall calloc(1, sizeof(*th)); 28953f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (th->nxt == NULL) 29053f17a9db278d33517d9888dd77848f554522a38JP Abgrall error("tcp_print: calloc"); 29153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 29253f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->addr = tha; 29353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) 29453f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->ack = seq, th->seq = ack - 1; 29553f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 29653f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->seq = seq, th->ack = ack - 1; 29753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 29853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) 29953f17a9db278d33517d9888dd77848f554522a38JP Abgrall seq -= th->ack, ack -= th->seq; 30053f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 30153f17a9db278d33517d9888dd77848f554522a38JP Abgrall seq -= th->seq, ack -= th->ack; 30253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 30353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 30453f17a9db278d33517d9888dd77848f554522a38JP Abgrall thseq = th->seq; 30553f17a9db278d33517d9888dd77848f554522a38JP Abgrall thack = th->ack; 30653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 30753f17a9db278d33517d9888dd77848f554522a38JP Abgrall#else /*INET6*/ 30853f17a9db278d33517d9888dd77848f554522a38JP Abgrall { 30953f17a9db278d33517d9888dd77848f554522a38JP Abgrall#endif /*INET6*/ 31053f17a9db278d33517d9888dd77848f554522a38JP Abgrall register struct tcp_seq_hash *th; 31153f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tcp_seq_hash *tcp_seq_hash; 31253f17a9db278d33517d9888dd77848f554522a38JP Abgrall const struct in_addr *src, *dst; 31353f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct tha tha; 31453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 31553f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_seq_hash = tcp_seq_hash4; 31653f17a9db278d33517d9888dd77848f554522a38JP Abgrall src = &ip->ip_src; 31753f17a9db278d33517d9888dd77848f554522a38JP Abgrall dst = &ip->ip_dst; 31853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sport > dport) 31953f17a9db278d33517d9888dd77848f554522a38JP Abgrall rev = 1; 32053f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == dport) { 32153f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (UNALIGNED_MEMCMP(src, dst, sizeof ip->ip_dst) > 0) 32253f17a9db278d33517d9888dd77848f554522a38JP Abgrall rev = 1; 32353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 32453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) { 32553f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.src, dst, sizeof ip->ip_dst); 32653f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.dst, src, sizeof ip->ip_src); 32753f17a9db278d33517d9888dd77848f554522a38JP Abgrall tha.port = dport << 16 | sport; 32853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 32953f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.dst, dst, sizeof ip->ip_dst); 33053f17a9db278d33517d9888dd77848f554522a38JP Abgrall UNALIGNED_MEMCPY(&tha.src, src, sizeof ip->ip_src); 33153f17a9db278d33517d9888dd77848f554522a38JP Abgrall tha.port = sport << 16 | dport; 33253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 33353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 33453f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (th = &tcp_seq_hash[tha.port % TSEQ_HASHSIZE]; 33553f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->nxt; th = th->nxt) 33653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (memcmp((char *)&tha, (char *)&th->addr, 33753f17a9db278d33517d9888dd77848f554522a38JP Abgrall sizeof(th->addr)) == 0) 33853f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 33953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 34053f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (!th->nxt || (flags & TH_SYN)) { 34153f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* didn't find it or new conversation */ 34253f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (th->nxt == NULL) { 34353f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->nxt = (struct tcp_seq_hash *) 34453f17a9db278d33517d9888dd77848f554522a38JP Abgrall calloc(1, sizeof(*th)); 34553f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (th->nxt == NULL) 34653f17a9db278d33517d9888dd77848f554522a38JP Abgrall error("tcp_print: calloc"); 34753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 34853f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->addr = tha; 34953f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) 35053f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->ack = seq, th->seq = ack - 1; 35153f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 35253f17a9db278d33517d9888dd77848f554522a38JP Abgrall th->seq = seq, th->ack = ack - 1; 35353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 35453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) 35553f17a9db278d33517d9888dd77848f554522a38JP Abgrall seq -= th->ack, ack -= th->seq; 35653f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 35753f17a9db278d33517d9888dd77848f554522a38JP Abgrall seq -= th->seq, ack -= th->ack; 35853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 35953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 36053f17a9db278d33517d9888dd77848f554522a38JP Abgrall thseq = th->seq; 36153f17a9db278d33517d9888dd77848f554522a38JP Abgrall thack = th->ack; 36253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 36353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 36453f17a9db278d33517d9888dd77848f554522a38JP Abgrall /*fool gcc*/ 36553f17a9db278d33517d9888dd77848f554522a38JP Abgrall thseq = thack = rev = 0; 36653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 36753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (hlen > length) { 368892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " [bad hdr length %u - too long, > %u]", 369892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes hlen, length)); 37053f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 37153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 37253f17a9db278d33517d9888dd77848f554522a38JP Abgrall 373892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ndo->ndo_vflag && !ndo->ndo_Kflag && !fragmented) { 37453f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Check the checksum, if possible. */ 375892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint16_t sum, tcp_sum; 37653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 37753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (IP_V(ip) == 4) { 378892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ND_TTEST2(tp->th_sport, length)) { 379892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes sum = tcp_cksum(ndo, ip, tp, length); 38053f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_sum = EXTRACT_16BITS(&tp->th_sum); 38153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 382892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum)); 38353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sum != 0) 384892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " (incorrect -> 0x%04x)", 385892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes in_cksum_shouldbe(tcp_sum, sum))); 38653f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 387892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " (correct)")); 38853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 38953f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 39053f17a9db278d33517d9888dd77848f554522a38JP Abgrall#ifdef INET6 39153f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (IP_V(ip) == 6 && ip6->ip6_plen) { 392892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ND_TTEST2(tp->th_sport, length)) { 393892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes sum = nextproto6_cksum(ip6, (const uint8_t *)tp, 394892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes length, length, IPPROTO_TCP); 39553f17a9db278d33517d9888dd77848f554522a38JP Abgrall tcp_sum = EXTRACT_16BITS(&tp->th_sum); 39653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 397892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", cksum 0x%04x", tcp_sum)); 39853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sum != 0) 399892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " (incorrect -> 0x%04x)", 400892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes in_cksum_shouldbe(tcp_sum, sum))); 40153f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 402892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " (correct)")); 40353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 40453f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 40553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 4062949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 40753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 40853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 40953f17a9db278d33517d9888dd77848f554522a38JP Abgrall length -= hlen; 410892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ndo->ndo_vflag > 1 || length > 0 || flags & (TH_SYN | TH_FIN | TH_RST)) { 411892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", seq %u", seq)); 41253f17a9db278d33517d9888dd77848f554522a38JP Abgrall 41353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (length > 0) { 414892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ":%u", seq + length)); 41553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 41653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 41753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 41853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (flags & TH_ACK) { 419892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", ack %u", ack)); 42053f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 42153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 422892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", win %d", win)); 42353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 42453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (flags & TH_URG) 425892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", urg %d", urp)); 42653f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 42753f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Handle any options. 42853f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 42953f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (hlen > sizeof(*tp)) { 43053f17a9db278d33517d9888dd77848f554522a38JP Abgrall register const u_char *cp; 43153f17a9db278d33517d9888dd77848f554522a38JP Abgrall register u_int i, opt, datalen; 43253f17a9db278d33517d9888dd77848f554522a38JP Abgrall register u_int len; 43353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 43453f17a9db278d33517d9888dd77848f554522a38JP Abgrall hlen -= sizeof(*tp); 43553f17a9db278d33517d9888dd77848f554522a38JP Abgrall cp = (const u_char *)tp + sizeof(*tp); 436892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", options [")); 43753f17a9db278d33517d9888dd77848f554522a38JP Abgrall while (hlen > 0) { 43853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ch != '\0') 439892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%c", ch)); 440892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_TCHECK(*cp); 44153f17a9db278d33517d9888dd77848f554522a38JP Abgrall opt = *cp++; 44253f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ZEROLENOPT(opt)) 44353f17a9db278d33517d9888dd77848f554522a38JP Abgrall len = 1; 44453f17a9db278d33517d9888dd77848f554522a38JP Abgrall else { 445892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_TCHECK(*cp); 44653f17a9db278d33517d9888dd77848f554522a38JP Abgrall len = *cp++; /* total including type, len */ 44753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (len < 2 || len > hlen) 44853f17a9db278d33517d9888dd77848f554522a38JP Abgrall goto bad; 44953f17a9db278d33517d9888dd77848f554522a38JP Abgrall --hlen; /* account for length byte */ 45053f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 45153f17a9db278d33517d9888dd77848f554522a38JP Abgrall --hlen; /* account for type byte */ 45253f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 0; 4532949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 4542949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* Bail if "l" bytes of data are not left or were not captured */ 455892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes#define LENCHECK(l) { if ((l) > hlen) goto bad; ND_TCHECK2(*cp, l); } 4562949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 45753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 458892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%s", tok2str(tcp_option_values, "unknown-%u", opt))); 45953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 46053f17a9db278d33517d9888dd77848f554522a38JP Abgrall switch (opt) { 46153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 46253f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_MAXSEG: 46353f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 2; 46453f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 465892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " %u", EXTRACT_16BITS(cp))); 46653f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 46753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 46853f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_WSCALE: 46953f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 1; 47053f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 471892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " %u", *cp)); 47253f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 47353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 47453f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_SACK: 47553f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = len - 2; 47653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen % 8 != 0) { 477892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "malformed sack")); 47853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 479892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint32_t s, e; 48053f17a9db278d33517d9888dd77848f554522a38JP Abgrall 481892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " %d ", datalen / 8)); 48253f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 0; i < datalen; i += 8) { 48353f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(i + 4); 48453f17a9db278d33517d9888dd77848f554522a38JP Abgrall s = EXTRACT_32BITS(cp + i); 48553f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(i + 8); 48653f17a9db278d33517d9888dd77848f554522a38JP Abgrall e = EXTRACT_32BITS(cp + i + 4); 48753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (rev) { 48853f17a9db278d33517d9888dd77848f554522a38JP Abgrall s -= thseq; 48953f17a9db278d33517d9888dd77848f554522a38JP Abgrall e -= thseq; 49053f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 49153f17a9db278d33517d9888dd77848f554522a38JP Abgrall s -= thack; 49253f17a9db278d33517d9888dd77848f554522a38JP Abgrall e -= thack; 49353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 494892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "{%u:%u}", s, e)); 49553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 49653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 49753f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 49853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 49953f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_CC: 50053f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_CCNEW: 50153f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_CCECHO: 50253f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_ECHO: 50353f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_ECHOREPLY: 50453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 50553f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 50653f17a9db278d33517d9888dd77848f554522a38JP Abgrall * those options share their semantics. 50753f17a9db278d33517d9888dd77848f554522a38JP Abgrall * fall through 50853f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 50953f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 4; 51053f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 511892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " %u", EXTRACT_32BITS(cp))); 51253f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 51353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 51453f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_TIMESTAMP: 51553f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 8; 51653f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 517892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " val %u ecr %u", 51853f17a9db278d33517d9888dd77848f554522a38JP Abgrall EXTRACT_32BITS(cp), 519892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes EXTRACT_32BITS(cp + 4))); 52053f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 52153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 52253f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_SIGNATURE: 52353f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = TCP_SIGLEN; 52453f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 5252949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef HAVE_LIBCRYPTO 526892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes switch (tcp_verify_signature(ndo, ip, tp, 52753f17a9db278d33517d9888dd77848f554522a38JP Abgrall bp + TH_OFF(tp) * 4, length, cp)) { 52853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 52953f17a9db278d33517d9888dd77848f554522a38JP Abgrall case SIGNATURE_VALID: 530892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "valid")); 53153f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 53253f17a9db278d33517d9888dd77848f554522a38JP Abgrall 53353f17a9db278d33517d9888dd77848f554522a38JP Abgrall case SIGNATURE_INVALID: 534892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "invalid")); 53553f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 53653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 53753f17a9db278d33517d9888dd77848f554522a38JP Abgrall case CANT_CHECK_SIGNATURE: 538892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "can't check - ")); 53953f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 0; i < TCP_SIGLEN; ++i) 540892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%02x", cp[i])); 54153f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 54253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 5432949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#else 54453f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 0; i < TCP_SIGLEN; ++i) 545892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%02x", cp[i])); 5462949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 54753f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 54853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 54953f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_AUTH: 550892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "keyid %d", *cp++)); 55153f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = len - 3; 55253f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 0; i < datalen; ++i) { 55353f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(i); 554892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%02x", cp[i])); 55553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 55653f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 55753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 55853f17a9db278d33517d9888dd77848f554522a38JP Abgrall 55953f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_EOL: 56053f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_NOP: 56153f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_SACKOK: 56253f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 56353f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Nothing interesting. 56453f17a9db278d33517d9888dd77848f554522a38JP Abgrall * fall through 56553f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 56653f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 56753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 56853f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_UTO: 56953f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = 2; 57053f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 57153f17a9db278d33517d9888dd77848f554522a38JP Abgrall utoval = EXTRACT_16BITS(cp); 572892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "0x%x", utoval)); 57353f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (utoval & 0x0001) 57453f17a9db278d33517d9888dd77848f554522a38JP Abgrall utoval = (utoval >> 1) * 60; 57553f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 57653f17a9db278d33517d9888dd77848f554522a38JP Abgrall utoval >>= 1; 577892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " %u", utoval)); 57853f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 57953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 58053f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_MPTCP: 58153f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = len - 2; 58253f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 583892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (!mptcp_print(ndo, cp-2, len, flags)) 58453f17a9db278d33517d9888dd77848f554522a38JP Abgrall goto bad; 58553f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 58653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 58753f17a9db278d33517d9888dd77848f554522a38JP Abgrall case TCPOPT_EXPERIMENT2: 58853f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = len - 2; 58953f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(datalen); 59053f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen < 2) 59153f17a9db278d33517d9888dd77848f554522a38JP Abgrall goto bad; 59253f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* RFC6994 */ 59353f17a9db278d33517d9888dd77848f554522a38JP Abgrall magic = EXTRACT_16BITS(cp); 594892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "-")); 59553f17a9db278d33517d9888dd77848f554522a38JP Abgrall 59653f17a9db278d33517d9888dd77848f554522a38JP Abgrall switch(magic) { 59753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 59853f17a9db278d33517d9888dd77848f554522a38JP Abgrall case 0xf989: 599892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes /* TCP Fast Open: RFC 7413 */ 60053f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen == 2) { 60153f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Fast Open Cookie Request */ 602892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "tfo cookiereq")); 60353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 60453f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Fast Open Cookie */ 60553f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen % 2 != 0 || datalen < 6 || datalen > 18) { 606892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "tfo malformed")); 60753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 608892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "tfo cookie ")); 60953f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 2; i < datalen; ++i) 610892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%02x", cp[i])); 61153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 61253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 61353f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 61453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 61553f17a9db278d33517d9888dd77848f554522a38JP Abgrall default: 61653f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Unknown magic number */ 617892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%04x", magic)); 61853f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 61953f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 62053f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 62153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 62253f17a9db278d33517d9888dd77848f554522a38JP Abgrall default: 62353f17a9db278d33517d9888dd77848f554522a38JP Abgrall datalen = len - 2; 62453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen) 625892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " 0x")); 62653f17a9db278d33517d9888dd77848f554522a38JP Abgrall for (i = 0; i < datalen; ++i) { 62753f17a9db278d33517d9888dd77848f554522a38JP Abgrall LENCHECK(i); 628892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "%02x", cp[i])); 62953f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 63053f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 63153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 63253f17a9db278d33517d9888dd77848f554522a38JP Abgrall 63353f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Account for data printed */ 63453f17a9db278d33517d9888dd77848f554522a38JP Abgrall cp += datalen; 63553f17a9db278d33517d9888dd77848f554522a38JP Abgrall hlen -= datalen; 63653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 63753f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* Check specification against observed length */ 63853f17a9db278d33517d9888dd77848f554522a38JP Abgrall ++datalen; /* option octet */ 63953f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (!ZEROLENOPT(opt)) 64053f17a9db278d33517d9888dd77848f554522a38JP Abgrall ++datalen; /* size octet */ 64153f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (datalen != len) 642892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "[len %d]", len)); 64353f17a9db278d33517d9888dd77848f554522a38JP Abgrall ch = ','; 64453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (opt == TCPOPT_EOL) 64553f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 64653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 647892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "]")); 64853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 64953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 65053f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 65153f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Print length field before crawling down the stack. 65253f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 653892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ", length %u", length)); 65453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 65553f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (length <= 0) 65653f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 65753f17a9db278d33517d9888dd77848f554522a38JP Abgrall 65853f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 65953f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Decode payload if necessary. 66053f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 66153f17a9db278d33517d9888dd77848f554522a38JP Abgrall bp += TH_OFF(tp) * 4; 662892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if ((flags & TH_RST) && ndo->ndo_vflag) { 663892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes print_tcp_rst_data(ndo, bp, length); 66453f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 665892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes } 66653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 667892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ndo->ndo_packettype) { 668892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes switch (ndo->ndo_packettype) { 66953f17a9db278d33517d9888dd77848f554522a38JP Abgrall case PT_ZMTP1: 670892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes zmtp1_print(ndo, bp, length); 67153f17a9db278d33517d9888dd77848f554522a38JP Abgrall break; 67253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 67353f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 67453f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 67553f17a9db278d33517d9888dd77848f554522a38JP Abgrall 67653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sport == TELNET_PORT || dport == TELNET_PORT) { 677892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes telnet_print(ndo, bp, length); 678892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes } else if (sport == SMTP_PORT || dport == SMTP_PORT) { 679892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": ")); 680892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes smtp_print(ndo, bp, length); 68153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else if (sport == BGP_PORT || dport == BGP_PORT) 682892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes bgp_print(ndo, bp, length); 68353f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == PPTP_PORT || dport == PPTP_PORT) 684892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes pptp_print(ndo, bp); 6852949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef TCPDUMP_DO_SMB 68653f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == NETBIOS_SSN_PORT || dport == NETBIOS_SSN_PORT) 687892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes nbt_tcp_print(ndo, bp, length); 68853f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == SMB_PORT || dport == SMB_PORT) 689892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes smb_tcp_print(ndo, bp, length); 6902949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 69153f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (sport == BEEP_PORT || dport == BEEP_PORT) 692892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes beep_print(ndo, bp, length); 693892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes else if (sport == OPENFLOW_PORT_OLD || dport == OPENFLOW_PORT_OLD || 694892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes sport == OPENFLOW_PORT_IANA || dport == OPENFLOW_PORT_IANA) 695892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes openflow_print(ndo, bp, length); 696892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes else if (sport == FTP_PORT || dport == FTP_PORT) { 697892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": ")); 698892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ftp_print(ndo, bp, length); 699892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes } else if (sport == HTTP_PORT || dport == HTTP_PORT || 700892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes sport == HTTP_PORT_ALT || dport == HTTP_PORT_ALT) { 701892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": ")); 702892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes http_print(ndo, bp, length); 703892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes } else if (sport == RTSP_PORT || dport == RTSP_PORT || 704892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes sport == RTSP_PORT_ALT || dport == RTSP_PORT_ALT) { 705892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": ")); 706892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes rtsp_print(ndo, bp, length); 707892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes } else if (length > 2 && 70853f17a9db278d33517d9888dd77848f554522a38JP Abgrall (sport == NAMESERVER_PORT || dport == NAMESERVER_PORT || 70953f17a9db278d33517d9888dd77848f554522a38JP Abgrall sport == MULTICASTDNS_PORT || dport == MULTICASTDNS_PORT)) { 71053f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 71153f17a9db278d33517d9888dd77848f554522a38JP Abgrall * TCP DNS query has 2byte length at the head. 71253f17a9db278d33517d9888dd77848f554522a38JP Abgrall * XXX packet could be unaligned, it can go strange 71353f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 714892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ns_print(ndo, bp + 2, length - 2, 0); 71553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else if (sport == MSDP_PORT || dport == MSDP_PORT) { 716892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes msdp_print(ndo, bp, length); 71753f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else if (sport == RPKI_RTR_PORT || dport == RPKI_RTR_PORT) { 718892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes rpki_rtr_print(ndo, bp, length); 71953f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 72053f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if (length > 0 && (sport == LDP_PORT || dport == LDP_PORT)) { 721892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ldp_print(ndo, bp, length); 72253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 72353f17a9db278d33517d9888dd77848f554522a38JP Abgrall else if ((sport == NFS_PORT || dport == NFS_PORT) && 724892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes length >= 4 && ND_TTEST2(*bp, 4)) { 72553f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 72653f17a9db278d33517d9888dd77848f554522a38JP Abgrall * If data present, header length valid, and NFS port used, 72753f17a9db278d33517d9888dd77848f554522a38JP Abgrall * assume NFS. 72853f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Pass offset of data plus 4 bytes for RPC TCP msg length 72953f17a9db278d33517d9888dd77848f554522a38JP Abgrall * to NFS print routines. 73053f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 731892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint32_t fraglen; 73253f17a9db278d33517d9888dd77848f554522a38JP Abgrall register struct sunrpc_msg *rp; 73353f17a9db278d33517d9888dd77848f554522a38JP Abgrall enum sunrpc_msg_type direction; 73453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 73553f17a9db278d33517d9888dd77848f554522a38JP Abgrall fraglen = EXTRACT_32BITS(bp) & 0x7FFFFFFF; 73653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (fraglen > (length) - 4) 73753f17a9db278d33517d9888dd77848f554522a38JP Abgrall fraglen = (length) - 4; 73853f17a9db278d33517d9888dd77848f554522a38JP Abgrall rp = (struct sunrpc_msg *)(bp + 4); 739892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ND_TTEST(rp->rm_direction)) { 74053f17a9db278d33517d9888dd77848f554522a38JP Abgrall direction = (enum sunrpc_msg_type)EXTRACT_32BITS(&rp->rm_direction); 74153f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (dport == NFS_PORT && direction == SUNRPC_CALL) { 742892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": NFS request xid %u ", EXTRACT_32BITS(&rp->rm_xid))); 743892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes nfsreq_print_noaddr(ndo, (u_char *)rp, fraglen, (u_char *)ip); 74453f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 74553f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 74653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (sport == NFS_PORT && direction == SUNRPC_REPLY) { 747892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ": NFS reply xid %u ", EXTRACT_32BITS(&rp->rm_xid))); 748892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes nfsreply_print_noaddr(ndo, (u_char *)rp, fraglen, (u_char *)ip); 74953f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 75053f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 75153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 75253f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 75353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 75453f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 75553f17a9db278d33517d9888dd77848f554522a38JP Abgrall bad: 756892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "[bad opt]")); 75753f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ch != '\0') 758892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ">")); 75953f17a9db278d33517d9888dd77848f554522a38JP Abgrall return; 76053f17a9db278d33517d9888dd77848f554522a38JP Abgrall trunc: 761892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "[|tcp]")); 76253f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (ch != '\0') 763892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ">")); 7642949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project} 7652949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 7662949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project/* 7672949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * RFC1122 says the following on data in RST segments: 7682949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 7692949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 4.2.2.12 RST Segment: RFC-793 Section 3.4 7702949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 7712949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * A TCP SHOULD allow a received RST segment to include data. 7722949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 7732949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * DISCUSSION 7742949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * It has been suggested that a RST segment could contain 7752949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * ASCII text that encoded and explained the cause of the 7762949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * RST. No standard has yet been established for such 7772949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * data. 7782949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project * 7792949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project */ 7802949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 7812949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstatic void 782892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughesprint_tcp_rst_data(netdissect_options *ndo, 783892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes register const u_char *sp, u_int length) 7842949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project{ 78553f17a9db278d33517d9888dd77848f554522a38JP Abgrall int c; 78653f17a9db278d33517d9888dd77848f554522a38JP Abgrall 787892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, ND_TTEST2(*sp, length) ? " [RST" : " [!RST")); 78853f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (length > MAX_RST_DATA_LEN) { 78953f17a9db278d33517d9888dd77848f554522a38JP Abgrall length = MAX_RST_DATA_LEN; /* can use -X for longer */ 790892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "+")); /* indicate we truncate */ 79153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 792892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, " ")); 793892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes while (length-- && sp <= ndo->ndo_snapend) { 79453f17a9db278d33517d9888dd77848f554522a38JP Abgrall c = *sp++; 795892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes safeputchar(ndo, c); 79653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 797892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "]")); 7982949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project} 7992949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 8002949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef HAVE_LIBCRYPTO 80153f17a9db278d33517d9888dd77848f554522a38JP AbgrallUSES_APPLE_DEPRECATED_API 8022949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Projectstatic int 803892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughestcp_verify_signature(netdissect_options *ndo, 804892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes const struct ip *ip, const struct tcphdr *tp, 80553f17a9db278d33517d9888dd77848f554522a38JP Abgrall const u_char *data, int length, const u_char *rcvsig) 8062949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project{ 8072949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project struct tcphdr tp1; 80853f17a9db278d33517d9888dd77848f554522a38JP Abgrall u_char sig[TCP_SIGLEN]; 80953f17a9db278d33517d9888dd77848f554522a38JP Abgrall char zero_proto = 0; 81053f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_CTX ctx; 811892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint16_t savecsum, tlen; 8122949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 81353f17a9db278d33517d9888dd77848f554522a38JP Abgrall struct ip6_hdr *ip6; 814892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint32_t len32; 815892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes uint8_t nxt; 8162949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 8172949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 818892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (data + length > ndo->ndo_snapend) { 819892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "snaplen too short, ")); 8202949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project return (CANT_CHECK_SIGNATURE); 82153f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 8222949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project 82353f17a9db278d33517d9888dd77848f554522a38JP Abgrall tp1 = *tp; 82453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 825892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes if (ndo->ndo_sigsecret == NULL) { 826892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "shared secret not supplied with -M, ")); 82753f17a9db278d33517d9888dd77848f554522a38JP Abgrall return (CANT_CHECK_SIGNATURE); 82853f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 82953f17a9db278d33517d9888dd77848f554522a38JP Abgrall 83053f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Init(&ctx); 83153f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 83253f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Step 1: Update MD5 hash with IP pseudo-header. 83353f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 83453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (IP_V(ip) == 4) { 83553f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&ip->ip_src, sizeof(ip->ip_src)); 83653f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&ip->ip_dst, sizeof(ip->ip_dst)); 83753f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&zero_proto, sizeof(zero_proto)); 83853f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&ip->ip_p, sizeof(ip->ip_p)); 83953f17a9db278d33517d9888dd77848f554522a38JP Abgrall tlen = EXTRACT_16BITS(&ip->ip_len) - IP_HL(ip) * 4; 84053f17a9db278d33517d9888dd77848f554522a38JP Abgrall tlen = htons(tlen); 84153f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&tlen, sizeof(tlen)); 8422949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#ifdef INET6 84353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else if (IP_V(ip) == 6) { 84453f17a9db278d33517d9888dd77848f554522a38JP Abgrall ip6 = (struct ip6_hdr *)ip; 84553f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&ip6->ip6_src, sizeof(ip6->ip6_src)); 84653f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&ip6->ip6_dst, sizeof(ip6->ip6_dst)); 84753f17a9db278d33517d9888dd77848f554522a38JP Abgrall len32 = htonl(EXTRACT_16BITS(&ip6->ip6_plen)); 84853f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&len32, sizeof(len32)); 84953f17a9db278d33517d9888dd77848f554522a38JP Abgrall nxt = 0; 85053f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&nxt, sizeof(nxt)); 85153f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&nxt, sizeof(nxt)); 85253f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&nxt, sizeof(nxt)); 85353f17a9db278d33517d9888dd77848f554522a38JP Abgrall nxt = IPPROTO_TCP; 85453f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&nxt, sizeof(nxt)); 8552949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif 85653f17a9db278d33517d9888dd77848f554522a38JP Abgrall } else { 85753f17a9db278d33517d9888dd77848f554522a38JP Abgrall#ifdef INET6 858892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "IP version not 4 or 6, ")); 85953f17a9db278d33517d9888dd77848f554522a38JP Abgrall#else 860892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes ND_PRINT((ndo, "IP version not 4, ")); 86153f17a9db278d33517d9888dd77848f554522a38JP Abgrall#endif 86253f17a9db278d33517d9888dd77848f554522a38JP Abgrall return (CANT_CHECK_SIGNATURE); 86353f17a9db278d33517d9888dd77848f554522a38JP Abgrall } 86453f17a9db278d33517d9888dd77848f554522a38JP Abgrall 86553f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 86653f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Step 2: Update MD5 hash with TCP header, excluding options. 86753f17a9db278d33517d9888dd77848f554522a38JP Abgrall * The TCP checksum must be set to zero. 86853f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 86953f17a9db278d33517d9888dd77848f554522a38JP Abgrall savecsum = tp1.th_sum; 87053f17a9db278d33517d9888dd77848f554522a38JP Abgrall tp1.th_sum = 0; 87153f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, (char *)&tp1, sizeof(struct tcphdr)); 87253f17a9db278d33517d9888dd77848f554522a38JP Abgrall tp1.th_sum = savecsum; 87353f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 87453f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Step 3: Update MD5 hash with TCP segment data, if present. 87553f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 87653f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (length > 0) 87753f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Update(&ctx, data, length); 87853f17a9db278d33517d9888dd77848f554522a38JP Abgrall /* 87953f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Step 4: Update MD5 hash with shared secret. 88053f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 881892a68bdf2f50b40781212e4d7ee7369c8165953Elliott Hughes MD5_Update(&ctx, ndo->ndo_sigsecret, strlen(ndo->ndo_sigsecret)); 88253f17a9db278d33517d9888dd77848f554522a38JP Abgrall MD5_Final(sig, &ctx); 88353f17a9db278d33517d9888dd77848f554522a38JP Abgrall 88453f17a9db278d33517d9888dd77848f554522a38JP Abgrall if (memcmp(rcvsig, sig, TCP_SIGLEN) == 0) 88553f17a9db278d33517d9888dd77848f554522a38JP Abgrall return (SIGNATURE_VALID); 88653f17a9db278d33517d9888dd77848f554522a38JP Abgrall else 88753f17a9db278d33517d9888dd77848f554522a38JP Abgrall return (SIGNATURE_INVALID); 8882949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project} 88953f17a9db278d33517d9888dd77848f554522a38JP AbgrallUSES_APPLE_RST 8902949f58a438f6fd85f66a8b7ed4708042cde4b37The Android Open Source Project#endif /* HAVE_LIBCRYPTO */ 89153f17a9db278d33517d9888dd77848f554522a38JP Abgrall 89253f17a9db278d33517d9888dd77848f554522a38JP Abgrall/* 89353f17a9db278d33517d9888dd77848f554522a38JP Abgrall * Local Variables: 89453f17a9db278d33517d9888dd77848f554522a38JP Abgrall * c-style: whitesmith 89553f17a9db278d33517d9888dd77848f554522a38JP Abgrall * c-basic-offset: 8 89653f17a9db278d33517d9888dd77848f554522a38JP Abgrall * End: 89753f17a9db278d33517d9888dd77848f554522a38JP Abgrall */ 898