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make driftnet read from pcap dumpfile #1

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make driftnet read from pcap dumpfile #1

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11 changes: 8 additions & 3 deletions driftnet.c
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Original file line number Diff line number Diff line change
Expand Up @@ -656,14 +656,19 @@ int main(int argc, char *argv[]) {
if (verbose)
fprintf(stderr, PROGNAME": using temporary file directory %s\n", tmpdir);

if (!interface && !(interface = pcap_lookupdev(ebuf))) {
if (!dumpfile && !interface && !(interface = pcap_lookupdev(ebuf))) {
fprintf(stderr, PROGNAME": pcap_lookupdev: %s\n", ebuf);
fprintf(stderr, PROGNAME": try specifying an interface with -i\n");
return -1;
}

if (verbose)
fprintf(stderr, PROGNAME": listening on %s%s\n", interface ? interface : "all interfaces", promisc ? " in promiscuous mode" : "");
if (verbose) {
if (interface) {
fprintf(stderr, PROGNAME": listening on %s%s\n", interface ? interface : "all interfaces", promisc ? " in promiscuous mode" : "");
} else if (dumpfile) {
fprintf(stderr, PROGNAME": processing packets from dumpfile '%s'\n", dumpfile);
}
}

/* Build up filter. */
if (optind < argc) {
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