source: examples/skeleton/complete.c @ 35e0869

/* Complete libtrace skeleton program
 *
 * This libtrace skeleton includes everything you need for a useful libtrace
 * program, including command line parsing, dealing with bpf filters etc.
 *
 */
#include "libtrace.h"
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>

void per_packet(libtrace_packet_t *packet)
{
        /* Your code goes here */
}

void usage(char *argv0)
{
        fprintf(stderr,"usage: %s [ --filter | -f bpfexp ]  [ --snaplen | -s snap ]\n\t\t[ --promisc | -p flag] [ --help | -h ] [ --libtrace-help | -H ] libtraceuri...\n",argv0);
}

int main(int argc, char *argv[])
{
        libtrace_t *trace;
        libtrace_packet_t *packet;
        libtrace_filter_t *filter=NULL;
        int snaplen=-1;
        int promisc=-1;

        while(1) {
                int option_index;
                struct option long_options[] = {
                        { "filter",             1, 0, 'f' },
                        { "snaplen",            1, 0, 's' },
                        { "promisc",            1, 0, 'p' },
                        { "help",               0, 0, 'h' },
                        { "libtrace-help",      0, 0, 'H' },
                        { NULL,                 0, 0, 0 }
                };

                int c= getopt_long(argc, argv, "f:s:p:hH",
                                long_options, &option_index);

                if (c==-1)
                        break;

                switch (c) {
                        case 'f':
                                filter=trace_create_filter(optarg);
                                break;
                        case 's':
                                snaplen=atoi(optarg);
                                break;
                        case 'p':
                                promisc=atoi(optarg);
                                break;
                        case 'H':
                                trace_help();
                                return 1;
                        default:
                                fprintf(stderr,"Unknown option: %c\n",c);
                                /* FALL THRU */
                        case 'h':
                                usage(argv[0]);
                                return 1;
                }
        }

        if (optind>=argc) {
                fprintf(stderr,"Missing input uri\n");
                usage(argv[0]);
                return 1;
        }

        while (optind<argc) {
                trace = trace_create(argv[optind]);
                ++optind;

                if (trace_is_err(trace)) {
                        trace_perror(trace,"Opening trace file");
                        return 1;
                }

                if (snaplen>0)
                        if (trace_config(trace,TRACE_OPTION_SNAPLEN,&snaplen)) {
                                trace_perror(trace,"ignoring: ");
                        }
                if (filter)
                        if (trace_config(trace,TRACE_OPTION_FILTER,filter)) {
                                trace_perror(trace,"ignoring: ");
                        }
                if (promisc!=-1) {
                        if (trace_config(trace,TRACE_OPTION_PROMISC,&promisc)) {
                                trace_perror(trace,"ignoring: ");
                        }
                }

                if (trace_start(trace)) {
                        trace_perror(trace,"Starting trace");
                        trace_destroy(trace);
                        return 1;
                }

                packet = trace_create_packet();

                while (trace_read_packet(trace,packet)>0) {
                        per_packet(packet);
                }

                trace_destroy_packet(packet);

                if (trace_is_err(trace)) {
                        trace_perror(trace,"Reading packets");
                }

                trace_destroy(trace);
        }

        return 0;
}