static void* packetPollLoop(void* ptr) {
PcapInterface *iface = (PcapInterface*)ptr;
pcap_t *pd;
FILE *pcap_list = iface->get_pcap_list();
/* Wait until the initialization completes */
while(!iface->isRunning()) sleep(1);
do {
if(pcap_list != NULL) {
char path[256], *fname;
pcap_t *pcap_handle;
while((fname = fgets(path, sizeof(path), pcap_list)) != NULL) {
char pcap_error_buffer[PCAP_ERRBUF_SIZE];
int l = (int)strlen(path)-1;
if((l <= 1) || (path[0] == '#')) continue;
path[l--] = '\0';
/* Remove trailer white spaces */
while((l > 0) && (path[l] == ' ')) path[l--] = '\0';
if((pcap_handle = pcap_open_offline(path, pcap_error_buffer)) == NULL) {
ntop->getTrace()->traceEvent(TRACE_ERROR, "Unable to open file '%s': %s",
path, pcap_error_buffer);
} else {
ntop->getTrace()->traceEvent(TRACE_NORMAL, "Reading packes from pcap file %s", path);
iface->set_pcap_handle(pcap_handle);
break;
}
}
if(fname == NULL) {
ntop->getTrace()->traceEvent(TRACE_NORMAL, "No more pcap files to read");
fclose(pcap_list);
return(NULL);
} else
iface->set_datalink(pcap_datalink(pcap_handle));
}
pd = iface->get_pcap_handle();
while((pd != NULL)
&& iface->isRunning()
&& (!ntop->getGlobals()->isShutdown())) {
const u_char *pkt;
struct pcap_pkthdr *hdr;
int rc;
while(iface->idle()) { iface->purgeIdle(time(NULL)); sleep(1); }
if((rc = pcap_next_ex(pd, &hdr, &pkt)) > 0) {
if((rc > 0) && (pkt != NULL) && (hdr->caplen > 0)) {
int a, b;
#ifdef WIN32
/*
For some unknown reason, on Windows winpcap
gets crazy with specific packets and so ntopng
crashes. Copying the packet memory onto a local buffer
prevents that, as specified in
https://github.com/ntop/ntopng/issues/194
*/
u_char pkt_copy[1600];
struct pcap_pkthdr hdr_copy;
memcpy(&hdr_copy, hdr, sizeof(hdr_copy));
hdr_copy.len = min(hdr->len, sizeof(pkt_copy) - 1);
hdr_copy.caplen = min(hdr_copy.len, hdr_copy.caplen);
memcpy(pkt_copy, pkt, hdr_copy.len);
iface->packet_dissector(&hdr_copy, (const u_char*)pkt_copy, &a, &b);
#else
hdr->caplen = min_val(hdr->caplen, iface->getMTU());
iface->packet_dissector(hdr, pkt, &a, &b);
#endif
}
} else if(rc < 0) {
if(iface->read_from_pcap_dump())
break;
} else {
/* No packet received before the timeout */
iface->purgeIdle(time(NULL));
}
} /* while */
} while(pcap_list != NULL);
ntop->getTrace()->traceEvent(TRACE_NORMAL, "Terminated packet polling for %s", iface->get_name());
if(ntop->getPrefs()->shutdownWhenDone())
ntop->getGlobals()->shutdown();
return(NULL);
}
static void* packetPollLoop(void* ptr) {
PcapInterface *iface = (PcapInterface*)ptr;
pcap_t *pd;
FILE *pcap_list = iface->get_pcap_list();
/* Wait until the initialization completes */
while(!iface->isRunning()) sleep(1);
do {
if(pcap_list != NULL) {
char path[256], *fname;
pcap_t *pcap_handle;
while((fname = fgets(path, sizeof(path), pcap_list)) != NULL) {
char pcap_error_buffer[PCAP_ERRBUF_SIZE];
int l = (int)strlen(path)-1;
if((l <= 1) || (path[0] == '#')) continue;
path[l--] = '\0';
/* Remove trailer white spaces */
while((l > 0) && (path[l] == ' ')) path[l--] = '\0';
if((pcap_handle = pcap_open_offline(path, pcap_error_buffer)) == NULL) {
ntop->getTrace()->traceEvent(TRACE_ERROR, "Unable to open file '%s': %s",
path, pcap_error_buffer);
} else {
ntop->getTrace()->traceEvent(TRACE_NORMAL, "Reading packes from pcap file %s", path);
iface->set_pcap_handle(pcap_handle);
break;
}
}
if(fname == NULL) {
ntop->getTrace()->traceEvent(TRACE_NORMAL, "No more pcap files to read");
fclose(pcap_list);
return(NULL);
} else
iface->set_datalink(pcap_datalink(pcap_handle));
}
pd = iface->get_pcap_handle();
while((pd != NULL)
&& iface->isRunning()
&& (!ntop->getGlobals()->isShutdown())) {
const u_char *pkt;
struct pcap_pkthdr hdr;
while(iface->idle()) { iface->purgeIdle(time(NULL)); sleep(1); }
if((pkt = pcap_next(pd, &hdr)) != NULL) {
if((hdr.caplen > 0) && (hdr.len > 0)) {
int a_shaper_id, b_shaper_id;
iface->packet_dissector(&hdr, pkt, &a_shaper_id, &b_shaper_id);
}
} else {
if(iface->read_from_pcap_dump())
break;
iface->purgeIdle(time(NULL));
}
} /* while */
} while(pcap_list != NULL);
ntop->getTrace()->traceEvent(TRACE_NORMAL, "Terminated packet polling for %s", iface->get_name());
if(ntop->getPrefs()->shutdownWhenDone())
ntop->getGlobals()->shutdown();
return(NULL);
}