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 #include <sys/types.h> 36 #include <sys/time.h> 37 #include <sys/socket.h> 38 #include <netdb.h> 39 40 #include <netinet/in.h> 41 #include <netinet/tcp.h> 42 43 #include <stdio.h> 44 #include <string.h> 45 46 #include "interface.h" 47 48 struct nfhdr { 49 u_int32_t ver_cnt; /* version [15], and # of records */ 50 u_int32_t msys_uptime; 51 u_int32_t utc_sec; 52 u_int32_t utc_nsec; 53 u_int32_t sequence; /* v5 flow sequence number */ 54 u_int32_t reserved; /* v5 only */ 55 }; 56 57 struct nfrec { 58 in_addr_t src_ina; 59 in_addr_t dst_ina; 60 in_addr_t nhop_ina; 61 u_int32_t ifaces; /* src,dst ifaces */ 62 u_int32_t packets; 63 u_int32_t octets; 64 u_int32_t start_time; /* sys_uptime value */ 65 u_int32_t last_time; /* sys_uptime value */ 66 u_int32_t ports; /* src,dst ports */ 67 u_int32_t proto_tos; /* proto, tos, pad, flags(v5) */ 68 u_int32_t asses; /* v1: flags; v5: src,dst AS */ 69 u_int32_t masks; /* src,dst addr prefix */ 70 71 }; 72 73 void 74 cnfp_print(register const u_char *cp, u_int len, register const u_char *bp) 75 { 76 register const struct nfhdr *nh; 77 register const struct nfrec *nr; 78 register const struct ip *ip; 79 struct protoent *pent; 80 int nrecs, ver; 81 time_t t; 82 char *p; 83 84 ip = (struct ip *)bp; 85 nh = (struct nfhdr *)cp; 86 87 if ((u_char *)(nh + 1) > snapend) 88 return; 89 90 nrecs = ntohl(nh->ver_cnt) & 0xffff; 91 ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16; 92 t = ntohl(nh->utc_sec); 93 /* (p = ctime(&t))[24] = '\0'; */ 94 95 printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, 96 ntohl(nh->msys_uptime)/1000, ntohl(nh->msys_uptime)%1000, 97 ntohl(nh->utc_sec), ntohl(nh->utc_nsec)); 98 99 if (ver == 5) { 100 printf("#%u, ", htonl(nh->sequence)); 101 nr = (struct nfrec *)&nh[1]; 102 snaplen -= 24; 103 } else { 104 nr = (struct nfrec *)&nh->sequence; 105 snaplen -= 16; 106 } 107 108 printf("%2u recs", nrecs); 109 110 for (; nrecs-- && (u_char *)(nr + 1) <= snapend; nr++) { 111 char buf[5]; 112 char asbuf[7]; 113 114 printf("\n started %u.%03u, last %u.%03u", 115 ntohl(nr->start_time)/1000, ntohl(nr->start_time)%1000, 116 ntohl(nr->last_time)/1000, ntohl(nr->last_time)%1000); 117 118 asbuf[0] = buf[0] = '\0'; 119 if (ver == 5) { 120 sprintf(buf, "/%d", (ntohl(nr->masks) >> 24) & 0xff); 121 sprintf(asbuf, "%d:", (ntohl(nr->asses) >> 16) & 0xffff); 122 } 123 printf("\n %s%s%s:%u ", inet_ntoa(nr->src_ina), buf, asbuf, 124 ntohl(nr->ports) >> 16); 125 126 if (ver == 5) { 127 sprintf(buf, "/%d", (ntohl(nr->masks) >> 16) & 0xff); 128 sprintf(asbuf, "%d:", ntohl(nr->asses) & 0xffff); 129 } 130 printf("> %s%s%s:%u ", inet_ntoa(nr->dst_ina), buf, asbuf, 131 ntohl(nr->ports) & 0xffff); 132 133 printf(">> %s\n ", inet_ntoa(nr->nhop_ina)); 134 135 pent = getprotobynumber((ntohl(nr->proto_tos) >> 8) & 0xff); 136 if (!pent || nflag) 137 printf("%u ", (ntohl(nr->proto_tos) >> 8) & 0xff); 138 else 139 printf("%s ", pent->p_name); 140 141 /* tcp flags for tcp only */ 142 if (pent && pent->p_proto == IPPROTO_TCP) { 143 int flags; 144 if (ver == 1) 145 flags = (ntohl(nr->asses) >> 24) & 0xff; 146 else 147 flags = (ntohl(nr->proto_tos) >> 16) & 0xff; 148 if (flags & TH_FIN) putchar('F'); 149 if (flags & TH_SYN) putchar('S'); 150 if (flags & TH_RST) putchar('R'); 151 if (flags & TH_PUSH) putchar('P'); 152 if (flags & TH_ACK) putchar('A'); 153 if (flags & TH_URG) putchar('U'); 154 if (flags) 155 putchar(' '); 156 } 157 printf("tos %u, %u (%u octets)", ntohl(nr->proto_tos) & 0xff, 158 ntohl(nr->packets), ntohl(nr->octets)); 159 160 161 } 162 163 } 164 165