pcapperf.c

#include <pcap.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char* argv[]) {
  if (argc != 2) {
    fprintf(stderr, "usage) pcapperf <dev>\n");
    return 1;
  }
  
  pcap_t *pd;
  char ebuf[PCAP_ERRBUF_SIZE];
  
  pd = pcap_open_live(argv[1], 0xffff, 1, 1, ebuf);
  if (pd == NULL) {
    fprintf(stderr, "pcap_open_live: %s\n", ebuf);
    return 1;
  }

  int rc;
  struct pcap_pkthdr *pkthdr;
  const u_char* pkt;
  struct timeval prev_tv, tv, dtv;
  int pkt_count = 0;
  int recv_size = 0;
  gettimeofday(&prev_tv, NULL);

  for (;;) {    
    rc = pcap_next_ex(pd, &pkthdr, &pkt);
    if (rc != 1) {
      continue;
    }
    
    pkt_count++;
    recv_size += pkthdr->caplen;
    
    gettimeofday(&tv, NULL);
    timersub(&tv, &prev_tv, &dtv);
    if (tv.tv_sec - prev_tv.tv_sec > 0) {
      double c = (double)pkt_count;
      double s = (double)recv_size;
      double d = (double)dtv.tv_sec + ((double)dtv.tv_usec) / 1000000;

      printf("%ld, %10.6lf pps,%10.6lf bps\n", tv.tv_sec, c / d, s / d);

      pkt_count = 0;
      recv_size = 0;
      memcpy(&prev_tv, &tv, sizeof(prev_tv));
    }
  }
}