pcap_stats() example

pcap-stats-example.c

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

int main(int argc, char* argv[])
{
    struct pcap_stat stat;
    pcap_t* pcaph;
    char errbuf[PCAP_ERRBUF_SIZE];

    if (argc != 2) {
        printf("Usage: %s <if>\n", argv[0]);
        return 1;
    }

    pcaph = pcap_open_live(argv[1], 65535, 0, 0, errbuf);

    if (!pcaph) {
        fprintf(stderr, "Error opening interface %s: %s\n", argv[1], errbuf);
        return 2;
    }

    while(1) {
        if (pcap_stats(pcaph, &stat) == -1) {
            fprintf(stderr, "Error collecting stats\n");
            return 2;
        }

        printf("%u\n", stat.ps_recv);
        sleep(1);
    }

    pcap_close(pcaph);
}