/* $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $ */ /* * Copyright (c) 1998 Michael Shalayeff * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Michael Shalayeff. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* Cisco NetFlow protocol */ #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.14.2.2 2003/11/16 08:51:15 guy Exp $"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" #include "tcp.h" #include "ipproto.h" struct nfhdr { u_int32_t ver_cnt; /* version [15], and # of records */ u_int32_t msys_uptime; u_int32_t utc_sec; u_int32_t utc_nsec; u_int32_t sequence; /* v5 flow sequence number */ u_int32_t reserved; /* v5 only */ }; struct nfrec { struct in_addr src_ina; struct in_addr dst_ina; struct in_addr nhop_ina; u_int32_t ifaces; /* src,dst ifaces */ u_int32_t packets; u_int32_t octets; u_int32_t start_time; /* sys_uptime value */ u_int32_t last_time; /* sys_uptime value */ u_int32_t ports; /* src,dst ports */ u_int32_t proto_tos; /* proto, tos, pad, flags(v5) */ u_int32_t asses; /* v1: flags; v5: src,dst AS */ u_int32_t masks; /* src,dst addr prefix; v6: encaps */ struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/ }; void cnfp_print(const u_char *cp, const u_char *bp) { register const struct nfhdr *nh; register const struct nfrec *nr; register const struct ip *ip; struct protoent *pent; int nrecs, ver; time_t t; ip = (const struct ip *)bp; nh = (const struct nfhdr *)cp; if ((const u_char *)(nh + 1) > snapend) return; nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff; ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16; t = EXTRACT_32BITS(&nh->utc_sec); /* (p = ctime(&t))[24] = '\0'; */ printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver, EXTRACT_32BITS(&nh->msys_uptime)/1000, EXTRACT_32BITS(&nh->msys_uptime)%1000, EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)); if (ver == 5 || ver == 6) { printf("#%u, ", EXTRACT_32BITS(&nh->sequence)); nr = (const struct nfrec *)&nh[1]; snaplen -= 24; } else { nr = (const struct nfrec *)&nh->sequence; snaplen -= 16; } printf("%2u recs", nrecs); for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) { char buf[20]; char asbuf[20]; printf("\n started %u.%03u, last %u.%03u", EXTRACT_32BITS(&nr->start_time)/1000, EXTRACT_32BITS(&nr->start_time)%1000, EXTRACT_32BITS(&nr->last_time)/1000, EXTRACT_32BITS(&nr->last_time)%1000); asbuf[0] = buf[0] = '\0'; if (ver == 5 || ver == 6) { snprintf(buf, sizeof(buf), "/%u", (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff); snprintf(asbuf, sizeof(asbuf), ":%u", (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff); } printf("\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf, EXTRACT_32BITS(&nr->ports) >> 16); if (ver == 5 || ver ==6) { snprintf(buf, sizeof(buf), "/%d", (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff); snprintf(asbuf, sizeof(asbuf), ":%u", EXTRACT_32BITS(&nr->asses) & 0xffff); } printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf, EXTRACT_32BITS(&nr->ports) & 0xffff); printf(">> %s\n ", intoa(nr->nhop_ina.s_addr)); pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); if (!pent || nflag) printf("%u ", (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff); else printf("%s ", pent->p_name); /* tcp flags for tcp only */ if (pent && pent->p_proto == IPPROTO_TCP) { int flags; if (ver == 1) flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff; else flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff; if (flags & TH_FIN) putchar('F'); if (flags & TH_SYN) putchar('S'); if (flags & TH_RST) putchar('R'); if (flags & TH_PUSH) putchar('P'); if (flags & TH_ACK) putchar('A'); if (flags & TH_URG) putchar('U'); if (flags) putchar(' '); } buf[0]='\0'; if (ver == 6) { snprintf(buf, sizeof(buf), "(%u<>%u encaps)", (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff, (EXTRACT_32BITS(&nr->masks)) & 0xff); } printf("tos %u, %u (%u octets) %s", EXTRACT_32BITS(&nr->proto_tos) & 0xff, EXTRACT_32BITS(&nr->packets), EXTRACT_32BITS(&nr->octets), buf); } }