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#include <netdb.h>
#include <inttypes.h>
#include <lt_inttypes.h>
#include <stdio.h>
#include "libtrace.h"
#include "tracereport.h"
#include "report.h"
static uint64_t rx_errors = 0;
static uint64_t ip_errors = 0;
static uint64_t tcp_errors = 0;
void error_per_packet(struct libtrace_packet_t *packet)
{
struct libtrace_ip *ip = trace_get_ip(packet);
struct libtrace_tcp *tcp = trace_get_tcp(packet);
void *link = trace_get_packet_buffer(packet,NULL,NULL);
if (!link) {
++rx_errors;
}
/* This isn't quite as simple as it seems.
*
* If the packets were captured via wdcap's anonymisation module,
* the checksum is set to 0 when it is correct and 1 if incorrect.
*
* If a different capture method is used, there's a good chance the
* checksum has not been altered
*/
if (ip) {
if (ntohs(ip->ip_sum)!=0)
++ip_errors;
}
if (tcp) {
if (ntohs(tcp->check)!=0)
++tcp_errors;
}
}
void error_report(void)
{
FILE *out = fopen("error.rpt", "w");
if (!out) {
perror("fopen");
return;
}
fprintf(out, "RX Errors: %" PRIu64 "\n",rx_errors);
fprintf(out, "IP Checksum errors: %" PRIu64 "\n",ip_errors);
/*printf("TCP Checksum errors: %" PRIu64 "\n",tcp_errors); */
fclose(out);
}
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