f49c5d523a
MFC after: 1 month
188 lines
6.0 KiB
C
188 lines
6.0 KiB
C
/* $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $ */
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/*
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* Copyright (c) 1998 Michael Shalayeff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Michael Shalayeff.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Cisco NetFlow protocol */
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "tcp.h"
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#include "ipproto.h"
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struct nfhdr {
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uint32_t ver_cnt; /* version [15], and # of records */
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uint32_t msys_uptime;
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uint32_t utc_sec;
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uint32_t utc_nsec;
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uint32_t sequence; /* v5 flow sequence number */
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uint32_t reserved; /* v5 only */
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};
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struct nfrec {
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struct in_addr src_ina;
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struct in_addr dst_ina;
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struct in_addr nhop_ina;
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uint32_t ifaces; /* src,dst ifaces */
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uint32_t packets;
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uint32_t octets;
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uint32_t start_time; /* sys_uptime value */
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uint32_t last_time; /* sys_uptime value */
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uint32_t ports; /* src,dst ports */
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uint32_t proto_tos; /* proto, tos, pad, flags(v5) */
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uint32_t asses; /* v1: flags; v5: src,dst AS */
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uint32_t masks; /* src,dst addr prefix; v6: encaps */
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struct in_addr peer_nexthop; /* v6: IP address of the nexthop within the peer (FIB)*/
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};
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void
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cnfp_print(netdissect_options *ndo,
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const u_char *cp, const u_char *bp _U_)
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{
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register const struct nfhdr *nh;
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register const struct nfrec *nr;
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struct protoent *pent;
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int nrecs, ver;
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#if 0
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time_t t;
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#endif
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nh = (const struct nfhdr *)cp;
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if ((const u_char *)(nh + 1) > ndo->ndo_snapend)
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return;
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nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
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ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
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#if 0
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/*
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* This is seconds since the UN*X epoch, and is followed by
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* nanoseconds. XXX - format it, rather than just dumping the
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* raw seconds-since-the-Epoch.
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*/
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t = EXTRACT_32BITS(&nh->utc_sec);
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#endif
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ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
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EXTRACT_32BITS(&nh->msys_uptime)/1000,
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EXTRACT_32BITS(&nh->msys_uptime)%1000,
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EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
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if (ver == 5 || ver == 6) {
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ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
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nr = (const struct nfrec *)&nh[1];
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ndo->ndo_snaplen -= 24;
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} else {
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nr = (const struct nfrec *)&nh->sequence;
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ndo->ndo_snaplen -= 16;
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}
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ND_PRINT((ndo, "%2u recs", nrecs));
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for (; nrecs-- && (const u_char *)(nr + 1) <= ndo->ndo_snapend; nr++) {
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char buf[20];
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char asbuf[20];
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ND_PRINT((ndo, "\n started %u.%03u, last %u.%03u",
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EXTRACT_32BITS(&nr->start_time)/1000,
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EXTRACT_32BITS(&nr->start_time)%1000,
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EXTRACT_32BITS(&nr->last_time)/1000,
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EXTRACT_32BITS(&nr->last_time)%1000));
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asbuf[0] = buf[0] = '\0';
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if (ver == 5 || ver == 6) {
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snprintf(buf, sizeof(buf), "/%u",
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(EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
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snprintf(asbuf, sizeof(asbuf), ":%u",
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(EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
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}
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ND_PRINT((ndo, "\n %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
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EXTRACT_32BITS(&nr->ports) >> 16));
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if (ver == 5 || ver ==6) {
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snprintf(buf, sizeof(buf), "/%d",
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(EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
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snprintf(asbuf, sizeof(asbuf), ":%u",
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EXTRACT_32BITS(&nr->asses) & 0xffff);
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}
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ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
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EXTRACT_32BITS(&nr->ports) & 0xffff));
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ND_PRINT((ndo, ">> %s\n ", intoa(nr->nhop_ina.s_addr)));
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pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
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if (!pent || ndo->ndo_nflag)
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ND_PRINT((ndo, "%u ",
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(EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff));
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else
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ND_PRINT((ndo, "%s ", pent->p_name));
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/* tcp flags for tcp only */
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if (pent && pent->p_proto == IPPROTO_TCP) {
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int flags;
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if (ver == 1)
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flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
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else
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flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
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ND_PRINT((ndo, "%s%s%s%s%s%s%s",
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flags & TH_FIN ? "F" : "",
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flags & TH_SYN ? "S" : "",
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flags & TH_RST ? "R" : "",
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flags & TH_PUSH ? "P" : "",
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flags & TH_ACK ? "A" : "",
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flags & TH_URG ? "U" : "",
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flags ? " " : ""));
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}
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buf[0]='\0';
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if (ver == 6) {
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snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
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(EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
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(EXTRACT_32BITS(&nr->masks)) & 0xff);
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}
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ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
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EXTRACT_32BITS(&nr->proto_tos) & 0xff,
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EXTRACT_32BITS(&nr->packets),
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EXTRACT_32BITS(&nr->octets), buf));
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}
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}
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