1 /* $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Michael Shalayeff. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* Cisco NetFlow protocol */ 34 35 #define NETDISSECT_REWORKED 36 #ifdef HAVE_CONFIG_H 37 #include "config.h" 38 #endif 39 40 #include <tcpdump-stdinc.h> 41 42 #include <stdio.h> 43 #include <string.h> 44 45 #include "interface.h" 46 #include "addrtoname.h" 47 #include "extract.h" 48 49 #include "tcp.h" 50 #include "ipproto.h" 51 52 struct nfhdr { 53 uint32_t ver_cnt; /* version [15], and # of records */ 54 uint32_t msys_uptime; 55 uint32_t utc_sec; 56 uint32_t utc_nsec; 57 uint32_t sequence; /* v5 flow sequence number */ 58 uint32_t reserved; /* v5 only */ 59 }; 60 61 struct nfrec { 62 struct in_addr src_ina; 63 struct in_addr dst_ina; 64 struct in_addr nhop_ina; 65 uint32_t ifaces; /* src,dst ifaces */ 66 uint32_t packets; 67 uint32_t octets; 68 uint32_t start_time; /* sys_uptime value */ 69 uint32_t last_time; /* sys_uptime value */ 70 uint32_t ports; /* src,dst ports */ 71 uint32_t proto_tos; /* proto, tos, pad, flags(v5) */ 72 uint32_t asses; /* v1: flags; v5: src,dst AS */ 73 uint32_t masks; /* src,dst addr prefix; v6: encaps */ 74 struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ 75 }; 76 77 void 78 cnfp_print(netdissect_options *ndo, 79 const u_char *cp, const u_char *bp _U_) 80 { 81 register const struct nfhdr *nh; 82 register const struct nfrec *nr; 83 struct protoent *pent; 84 int nrecs, ver; 85 #if 0 86 time_t t; 87 #endif 88 89 nh = (const struct nfhdr *)cp; 90 91 if ((const u_char *)(nh + 1) > ndo->ndo_snapend) 92 return; 93 94 nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff; 95 ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16; 96 #if 0 97 /* 98 * This is seconds since the UN*X epoch, and is followed by 99 * nanoseconds. XXX - format it, rather than just dumping the 100 * raw seconds-since-the-Epoch. 101 */ 102 t = EXTRACT_32BITS(&nh->utc_sec); 103 #endif 104 105 ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, 106 EXTRACT_32BITS(&nh->msys_uptime)/1000, 107 EXTRACT_32BITS(&nh->msys_uptime)%1000, 108 EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec))); 109 110 if (ver == 5 || ver == 6) { 111 ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence))); 112 nr = (const struct nfrec *)&nh[1]; 113 ndo->ndo_snaplen -= 24; 114 } else { 115 nr = (const struct nfrec *)&nh->sequence; 116 ndo->ndo_snaplen -= 16; 117 } 118 119 ND_PRINT((ndo, "%2u recs", nrecs)); 120 121 for (; nrecs-- && (const u_char *)(nr + 1) <= ndo->ndo_snapend; nr++) { 122 char buf[20]; 123 char asbuf[20]; 124 125 ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u", 126 EXTRACT_32BITS(&nr->start_time)/1000, 127 EXTRACT_32BITS(&nr->start_time)%1000, 128 EXTRACT_32BITS(&nr->last_time)/1000, 129 EXTRACT_32BITS(&nr->last_time)%1000)); 130 131 asbuf[0] = buf[0] = '\0'; 132 if (ver == 5 || ver == 6) { 133 snprintf(buf, sizeof(buf), "/%u", 134 (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff); 135 snprintf(asbuf, sizeof(asbuf), ":%u", 136 (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff); 137 } 138 ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, 139 EXTRACT_32BITS(&nr->ports) >> 16)); 140 141 if (ver == 5 || ver ==6) { 142 snprintf(buf, sizeof(buf), "/%d", 143 (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff); 144 snprintf(asbuf, sizeof(asbuf), ":%u", 145 EXTRACT_32BITS(&nr->asses) & 0xffff); 146 } 147 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, 148 EXTRACT_32BITS(&nr->ports) & 0xffff)); 149 150 ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr))); 151 152 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); 153 if (!pent || ndo->ndo_nflag) 154 ND_PRINT((ndo, "%u ", 155 (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff)); 156 else 157 ND_PRINT((ndo, "%s ", pent->p_name)); 158 159 /* tcp flags for tcp only */ 160 if (pent && pent->p_proto == IPPROTO_TCP) { 161 int flags; 162 if (ver == 1) 163 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff; 164 else 165 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff; 166 ND_PRINT((ndo, "%s%s%s%s%s%s%s", 167 flags & TH_FIN ? "F" : "", 168 flags & TH_SYN ? "S" : "", 169 flags & TH_RST ? "R" : "", 170 flags & TH_PUSH ? "P" : "", 171 flags & TH_ACK ? "A" : "", 172 flags & TH_URG ? "U" : "", 173 flags ? " " : "")); 174 } 175 176 buf[0]='\0'; 177 if (ver == 6) { 178 snprintf(buf, sizeof(buf), "(%u<>%u encaps)", 179 (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff, 180 (EXTRACT_32BITS(&nr->masks)) & 0xff); 181 } 182 ND_PRINT((ndo, "tos %u, %u (%u octets) %s", 183 EXTRACT_32BITS(&nr->proto_tos) & 0xff, 184 EXTRACT_32BITS(&nr->packets), 185 EXTRACT_32BITS(&nr->octets), buf)); 186 } 187 } 188