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      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