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 #ifndef lint 36 static const char rcsid[] _U_ = 37 "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.17 2005-04-20 20:53:18 guy Exp $"; 38 #endif 39 40 #ifdef HAVE_CONFIG_H 41 #include "config.h" 42 #endif 43 44 #include <tcpdump-stdinc.h> 45 46 #include <stdio.h> 47 #include <string.h> 48 49 #include "interface.h" 50 #include "addrtoname.h" 51 #include "extract.h" 52 53 #include "tcp.h" 54 #include "ipproto.h" 55 56 struct nfhdr { 57 u_int32_t ver_cnt; /* version [15], and # of records */ 58 u_int32_t msys_uptime; 59 u_int32_t utc_sec; 60 u_int32_t utc_nsec; 61 u_int32_t sequence; /* v5 flow sequence number */ 62 u_int32_t reserved; /* v5 only */ 63 }; 64 65 struct nfrec { 66 struct in_addr src_ina; 67 struct in_addr dst_ina; 68 struct in_addr nhop_ina; 69 u_int32_t ifaces; /* src,dst ifaces */ 70 u_int32_t packets; 71 u_int32_t octets; 72 u_int32_t start_time; /* sys_uptime value */ 73 u_int32_t last_time; /* sys_uptime value */ 74 u_int32_t ports; /* src,dst ports */ 75 u_int32_t proto_tos; /* proto, tos, pad, flags(v5) */ 76 u_int32_t asses; /* v1: flags; v5: src,dst AS */ 77 u_int32_t masks; /* src,dst addr prefix; v6: encaps */ 78 struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ 79 }; 80 81 void 82 cnfp_print(const u_char *cp, const u_char *bp _U_) 83 { 84 register const struct nfhdr *nh; 85 register const struct nfrec *nr; 86 struct protoent *pent; 87 int nrecs, ver; 88 #if 0 89 time_t t; 90 #endif 91 92 nh = (const struct nfhdr *)cp; 93 94 if ((const u_char *)(nh + 1) > snapend) 95 return; 96 97 nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff; 98 ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16; 99 #if 0 100 /* 101 * This is seconds since the UN*X epoch, and is followed by 102 * nanoseconds. XXX - format it, rather than just dumping the 103 * raw seconds-since-the-Epoch. 104 */ 105 t = EXTRACT_32BITS(&nh->utc_sec); 106 #endif 107 108 printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, 109 EXTRACT_32BITS(&nh->msys_uptime)/1000, 110 EXTRACT_32BITS(&nh->msys_uptime)%1000, 111 EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)); 112 113 if (ver == 5 || ver == 6) { 114 printf("#%u, ", EXTRACT_32BITS(&nh->sequence)); 115 nr = (const struct nfrec *)&nh[1]; 116 snaplen -= 24; 117 } else { 118 nr = (const struct nfrec *)&nh->sequence; 119 snaplen -= 16; 120 } 121 122 printf("%2u recs", nrecs); 123 124 for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) { 125 char buf[20]; 126 char asbuf[20]; 127 128 printf("\n started %u.%03u, last %u.%03u", 129 EXTRACT_32BITS(&nr->start_time)/1000, 130 EXTRACT_32BITS(&nr->start_time)%1000, 131 EXTRACT_32BITS(&nr->last_time)/1000, 132 EXTRACT_32BITS(&nr->last_time)%1000); 133 134 asbuf[0] = buf[0] = '\0'; 135 if (ver == 5 || ver == 6) { 136 snprintf(buf, sizeof(buf), "/%u", 137 (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff); 138 snprintf(asbuf, sizeof(asbuf), ":%u", 139 (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff); 140 } 141 printf("\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, 142 EXTRACT_32BITS(&nr->ports) >> 16); 143 144 if (ver == 5 || ver ==6) { 145 snprintf(buf, sizeof(buf), "/%d", 146 (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff); 147 snprintf(asbuf, sizeof(asbuf), ":%u", 148 EXTRACT_32BITS(&nr->asses) & 0xffff); 149 } 150 printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, 151 EXTRACT_32BITS(&nr->ports) & 0xffff); 152 153 printf(">> %s\n ", intoa(nr->nhop_ina.s_addr)); 154 155 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); 156 if (!pent || nflag) 157 printf("%u ", 158 (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); 159 else 160 printf("%s ", pent->p_name); 161 162 /* tcp flags for tcp only */ 163 if (pent && pent->p_proto == IPPROTO_TCP) { 164 int flags; 165 if (ver == 1) 166 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff; 167 else 168 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff; 169 if (flags & TH_FIN) putchar('F'); 170 if (flags & TH_SYN) putchar('S'); 171 if (flags & TH_RST) putchar('R'); 172 if (flags & TH_PUSH) putchar('P'); 173 if (flags & TH_ACK) putchar('A'); 174 if (flags & TH_URG) putchar('U'); 175 if (flags) 176 putchar(' '); 177 } 178 179 buf[0]='\0'; 180 if (ver == 6) { 181 snprintf(buf, sizeof(buf), "(%u<>%u encaps)", 182 (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff, 183 (EXTRACT_32BITS(&nr->masks)) & 0xff); 184 } 185 printf("tos %u, %u (%u octets) %s", 186 EXTRACT_32BITS(&nr->proto_tos) & 0xff, 187 EXTRACT_32BITS(&nr->packets), 188 EXTRACT_32BITS(&nr->octets), buf); 189 } 190 } 191