source: test/test-decode.c

/*
 * This file is part of libtrace
 *
 * Copyright (c) 2007 The University of Waikato, Hamilton, New Zealand.
 * Authors: Daniel Lawson 
 *          Perry Lorier 
 *          
 * All rights reserved.
 *
 * This code has been developed by the University of Waikato WAND 
 * research group. For further information please see http://www.wand.net.nz/
 *
 * libtrace is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * libtrace is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with libtrace; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: test-rtclient.c,v 1.2 2006/02/27 03:41:12 perry Exp $
 *
 */
#ifndef WIN32
#  include <sys/time.h>
#  include <netinet/in.h>
#  include <netinet/in_systm.h>
#  include <netinet/tcp.h>
#  include <netinet/ip.h>
#  include <netinet/ip_icmp.h>
#  include <arpa/inet.h>
#  include <sys/socket.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <string.h>

#include "dagformat.h"
#include "libtrace.h"
#include "libpacketdump.h"

void iferr(libtrace_t *trace)
{
        libtrace_err_t err = trace_get_err(trace);
        if (err.err_num==0)
                return;
        printf("Error: %s\n",err.problem);
        exit(1);
}

const char *lookup_uri(const char *type) {
        if (strchr(type,':') || strchr(type,'/'))
                return type;
        if (!strcmp(type,"erf"))
                return "erf:traces/100_packets.erf";
        if (!strcmp(type,"rawerf"))
                return "rawerf:traces/100_packets.erf";
        if (!strcmp(type,"pcap"))
                return "pcap:traces/100_packets.pcap";
        if (!strcmp(type,"pcapng"))
                return "pcap:traces/100_packets.pcapng";
        if (!strcmp(type,"wtf"))
                return "wtf:traces/wed.wtf";
        if (!strcmp(type,"rtclient"))
                return "rtclient:chasm";
        if (!strcmp(type,"pcapfile"))
                return "pcapfile:traces/100_packets.pcap";
        if (!strcmp(type,"pcapfilens"))
                return "pcapfile:traces/100_packetsns.pcap";
        if (!strcmp(type, "duck"))
                return "duck:traces/100_packets.duck";
        if (!strcmp(type, "legacyatm"))
                return "legacyatm:traces/legacyatm.gz";
        if (!strcmp(type, "legacypos"))
                return "legacypos:traces/legacypos.gz";
        if (!strcmp(type, "legacyeth"))
                return "legacyeth:traces/legacyeth.gz";
        if (!strcmp(type, "tsh"))
                return "tsh:traces/10_packets.tsh.gz";
        return type;
}

int main(int argc, char *argv[]) {
        int psize = 0;
        int error = 0;
        int count = 0;
        int level = 0;
        int expected = 100;
        libtrace_t *trace;
        libtrace_packet_t *packet;
        libtrace_filter_t *filter_tcp = trace_create_filter("tcp");
        libtrace_filter_t *filter_udp = 
                trace_create_filter("udp and ip[6:2] & 0x1fff = 0");
        libtrace_filter_t *filter_icmp = trace_create_filter("icmp");

        if (argc<2) {
                fprintf(stderr,"usage: %s type\n",argv[0]);
                return 1;
        }

        trace = trace_create(lookup_uri(argv[1]));
        iferr(trace);

        if (strcmp(argv[1],"rtclient")==0) expected=101;
        
        level=0;

        trace_start(trace);
        iferr(trace);
        
        packet=trace_create_packet();
        for (;;) {
                uint8_t proto;
                bool lt_tcp;
                bool bpf_tcp;
                if ((psize = trace_read_packet(trace, packet)) <0) {
                        error = 1;
                        iferr(trace);
                        break;
                }
                if (psize == 0) {
                        error = 0;
                        break;
                }

                lt_tcp = trace_get_transport(packet,&proto,NULL) && proto == 6;
                bpf_tcp = trace_apply_filter(filter_tcp,packet)>0;

                if (lt_tcp != bpf_tcp) {
                        error=1;
                        printf("tcp problem\n");
                        if (trace_get_tcp(packet)) {
                                printf(" libtrace thinks this is a tcp packet\n");
                        }
                        else {
                                printf(" libtrace doesn't think this is a tcp packet\n");
                        }
                        if (trace_apply_filter(filter_tcp,packet)) {
                                printf(" bpf thinks this is a tcp packet\n");
                        }
                        else {
                                printf(" bpf doesn't think this is a tcp packet\n");
                        }
                        trace_dump_packet(packet);
                        break;
                }
                if ((trace_get_udp(packet)!=NULL) ^ (trace_apply_filter(filter_udp,packet)>0)) {
                        error=1;
                        printf("udp problem\n");
                        if (trace_get_udp(packet)) {
                                printf(" libtrace thinks this is a udp packet\n");
                        }
                        else {
                                printf(" libtrace doesn't think this is a udp packet\n");
                        }
                        if (trace_apply_filter(filter_udp,packet)) {
                                printf(" bpf thinks this is a udp packet\n");
                        }
                        else {
                                printf(" bpf doesn't think this is a udp packet\n");
                        }
                        trace_dump_packet(packet);
                        break;
                }
                if ((trace_get_icmp(packet)!=NULL) ^ (trace_apply_filter(filter_icmp,packet)>0)) {
                        error=1;
                        printf("icmp problem\n");
                        trace_dump_packet(packet);
                        break;
                }
                count ++;
                if (count>100)
                        break;
        }
        trace_destroy_packet(packet);
        if (error == 0) {
                if (count == expected) {
                        printf("success: %d packets read\n",expected);
                } else {
                        printf("failure: %d packets expected, %d seen\n",expected,count);
                        error = 1;
                }
        } else {
                iferr(trace);
        }
        trace_destroy(trace);
        return error;
}