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filter expression works

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wangyu- 2018-06-14 08:18:26 -05:00
parent fed5bdc700
commit 1a4c494978
1 changed files with 31 additions and 13 deletions
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44
network.cpp
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@ -275,24 +275,42 @@ int init_raw_socket()
} }
struct bpf_program filter;
char filter_exp[1000];
if(raw_mode==mode_faketcp)
{
if(pthread_create(&pcap_recv_thread, NULL, pcap_recv_thread_entry, 0)) { sprintf(filter_exp,"tcp and src %s and port %d",remote_ip,remote_port);
mylog(log_fatal, "Error creating thread\n");
myexit(-1);
} }
/* else if(raw_mode==mode_udp)
if (pcap_compile(handle, &fp, filter_exp, 0, net) == -1) { {
fprintf(stderr, "Couldn't parse filter %s: %s\n", filter_exp, pcap_geterr(handle)); sprintf(filter_exp,"udp and src %s and port %d",remote_ip,remote_port);
return(2); }
else if(raw_mode==mode_icmp)
{
sprintf(filter_exp,"icmp and src %s",remote_ip);
}
else
{
assert(0==1);
}
mylog(log_info,"filter expression is [%s]\n",filter_exp);
if (pcap_compile(pcap_handle, &filter, filter_exp, 0, PCAP_NETMASK_UNKNOWN ) == -1) {
printf("Bad filter - %s\n", pcap_geterr(pcap_handle));
assert(0==1);
} }
if (pcap_setfilter(handle, &fp) == -1) { if (pcap_setfilter(pcap_handle, &filter) == -1) {
fprintf(stderr, "Couldn't install filter %s: %s\n", filter_exp, pcap_geterr(handle)); printf("Error setting filter - %s\n", pcap_geterr(pcap_handle));
return(2); assert(0==1);
} }
*/ if(pthread_create(&pcap_recv_thread, NULL, pcap_recv_thread_entry, 0)) {
mylog(log_fatal, "Error creating thread\n");
myexit(-1);
}
g_ip_id_counter=get_true_random_number()%65535; g_ip_id_counter=get_true_random_number()%65535;