text: /*	$OpenBSD: print-cnfp.c,v 1.10 2018/07/06 05:47:22 dlg 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.
   *
   * 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 */
  
  #include <sys/types.h>
  #include <sys/time.h>
  #include <sys/socket.h>
  #include <netdb.h>
  
  #include <netinet/in.h>
  #include <netinet/tcp.h>
  #include <arpa/inet.h>
  
  #include <stdio.h>
  #include <string.h>
  
  #include "interface.h"
  #include "addrtoname.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 */
  
  };
  
  void
  cnfp_print(const u_char *cp, u_int len)
  {
  	const struct nfhdr *nh;
  	const struct nfrec *nr;
  	int nrecs, ver, proto;
  	time_t t;
  
  	nh = (struct nfhdr *)cp;
  
  	if ((u_char *)(nh + 1) > snapend)
  		return;
  
  	nrecs = ntohl(nh->ver_cnt) & 0xffff;
  	ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16;
  	t = ntohl(nh->utc_sec);
  /*	(p = ctime(&t))[24] = '\0'; */
  
  	printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
  	       ntohl(nh->msys_uptime)/1000, ntohl(nh->msys_uptime)%1000,
  	       ntohl(nh->utc_sec), ntohl(nh->utc_nsec));
  
  	if (ver == 5) {
  		printf("#%u, ", htonl(nh->sequence));
  		nr = (struct nfrec *)&nh[1];
  	} else
  		nr = (struct nfrec *)&nh->sequence;
  
  	printf("%2u recs", nrecs);
  
  	for (; nrecs-- && (u_char *)(nr + 1) <= snapend; nr++) {
  		char buf[5];
  		char asbuf[7];
  
  		printf("\n  started %u.%03u, last %u.%03u",
  			ntohl(nr->start_time)/1000, ntohl(nr->start_time)%1000,
  			ntohl(nr->last_time)/1000, ntohl(nr->last_time)%1000);
  
  		asbuf[0] = buf[0] = '\0';
  		if (ver == 5) {
  			snprintf(buf, sizeof buf, "/%d",
  			    (ntohl(nr->masks) >> 24) & 0xff);
  			snprintf(asbuf, sizeof asbuf, ":%d",
  			    (ntohl(nr->asses) >> 16) & 0xffff);
  		}
  		printf("\n    %s%s%s:%u ", inet_ntoa(nr->src_ina), buf, asbuf,
  			ntohl(nr->ports) >> 16);
  
  		if (ver == 5) {
  			snprintf(buf, sizeof buf, "/%d",
  			    (ntohl(nr->masks) >> 16) & 0xff);
  			snprintf(asbuf, sizeof asbuf, ":%d",
  			    ntohl(nr->asses) & 0xffff);
  		}
  		printf("> %s%s%s:%u ", inet_ntoa(nr->dst_ina), buf, asbuf,
  			ntohl(nr->ports) & 0xffff);
  
  		printf(">> %s\n    ", inet_ntoa(nr->nhop_ina));
  
  		proto = (ntohl(nr->proto_tos) >> 8) & 0xff;
  		printf("%s ", ipproto_string(proto));
  
  		/* tcp flags for tcp only */
  		if (proto == IPPROTO_TCP) {
  			int flags;
  			if (ver == 1)
  				flags = (ntohl(nr->asses) >> 24) & 0xff;
  			else
  				flags = (ntohl(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(' ');
  		}
  		printf("tos %u, %u (%u octets)", ntohl(nr->proto_tos) & 0xff,
  			ntohl(nr->packets), ntohl(nr->octets));
  
  
  	}
  
  }
  
  