/* the main processing function: opens pcap_t interface, creates and initializes
the CapEnv instance, starts the data processing and handles deinitialization sequence */
int proceed( const SSTRACE_ARGS* args )
{
pcap_t* p = NULL;
CapEnv* env = NULL;
int rc = 0;
/* First, open the pcap adapter */
p = open_adapter( args );
if( !p ) return -1;
/* Create and initialize the CapEnv structure */
env = CapEnvCreate( p, 100, 0, 0, 0 );
if( args->keyfile[0] != 0 ) {
rc = CapEnvSetSSL_ServerInfo( env, &args->server_ip, args->port,
args->keyfile, args->pwd );
}
if (rc == 0 ) CapEnvSetSessionCallback( env, session_event_handler, NULL );
if( rc == 0 )
{
rc = CapEnvCapture( env );
if( rc != 0 )
{
sprintf( ErrBuffer, "CapEnvCapture failed. Pcap error message:%s", pcap_geterr(p) );
}
}
if( env )
{
CapEnvDestroy( env );
env = NULL;
}
if( p )
{
pcap_close( p );
p = NULL;
}
return rc;
}
static int proceed(void)
{
pcap_t* p = NULL;
CapEnv* env = NULL;
int rc = 0;
struct bpf_program fp; /* The compiled filter expression */
char filter_exp[1024];
p = pcap_open_live(config.cap[capindex]->src_interface, 1550, 1, 500, errbuf.common);
if (!p)
{
if (config.daemon)
syslog(LOG_CRIT, "pcap_open_live error: %s", errbuf.common);
else
fprintf(stderr, "ERROR: pcap_open_live error: %s\n", errbuf.common);
return(-1);
}
sprintf( filter_exp, "ip host %s and tcp port %d", inet_ntoa(config.cap[capindex]->server_ip), config.cap[capindex]->port );
if (pcap_compile(p, &fp, filter_exp, 0, 0) == -1)
{
fprintf(stderr, "Couldn't parse filter %s: %s\n", filter_exp, pcap_geterr(p));
return(-1);
}
if (pcap_setfilter(p, &fp) == -1)
{
fprintf(stderr, "Couldn't install filter %s: %s\n", filter_exp, pcap_geterr(p));
return(-1);
}
// 255 is sessionTableSize
// First 0 means use default key_timeout_interval - libdssl 2.1.1 will use 3600 here
// Second 0 means use default tcp_timeout_interval - libdssl 2.1.1 will use 180 here
env = CapEnvCreate(p, 255, 0, 0);
rc = CapEnvSetSSL_ServerInfo(env, &config.cap[capindex]->server_ip, config.cap[capindex]->port,
config.cap[capindex]->keyfile, config.cap[capindex]->pwd);
if (rc != 0)
{
if (config.daemon)
syslog(LOG_CRIT, "CapEnvSetSSL_ServerInfo() failed, code %d: %s", \
rc, dssl_error(rc));
else
fprintf(stderr,"ERROR: CapEnvSetSSL_ServerInfo() failed, code %d.\n", rc);
return(-1);
}
CapEnvSetSessionCallback(env, session_event_handler, NULL);
rc = CapEnvCapture(env);
if (rc != 0)
{
if (config.daemon)
syslog(LOG_CRIT, "CapEnvCapture() failed.");
else
fprintf(stderr,"CapEnvCapture() failed.\n");
return(-1);
}
if (env)
{
CapEnvDestroy(env);
env = NULL;
}
if (p)
{
pcap_close(p);
p = NULL;
}
return(rc);
}