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add support for arbitrary buffer number #20

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add support for arbitrary buffer number #20

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12 changes: 8 additions & 4 deletions util/exanic-capture.c
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Original file line number Diff line number Diff line change
Expand Up @@ -480,8 +480,9 @@ int main(int argc, char *argv[])
unsigned long file_size = 0, file_size_limit = 0;
char file_name_buf[4096];
int c;
int buffer_number = 0;

while ((c = getopt(argc, argv, "i:w:s:C:F:pHNh?")) != -1)
while ((c = getopt(argc, argv, "i:w:s:C:F:b:pHNh?")) != -1)
{
switch (c)
{
Expand Down Expand Up @@ -516,6 +517,8 @@ int main(int argc, char *argv[])
case 'N':
nsec_pcap = 1;
break;
case 'b':
buffer_number = atoi(optarg);
default:
goto usage_error;
}
Expand Down Expand Up @@ -566,7 +569,7 @@ int main(int argc, char *argv[])
if (filter)
rx = exanic_acquire_unused_filter_buffer(exanic, port_number);
else
rx = exanic_acquire_rx_buffer(exanic, port_number, 0);
rx = exanic_acquire_rx_buffer(exanic, port_number, buffer_number);

if (rx == NULL)
{
Expand Down Expand Up @@ -720,15 +723,16 @@ int main(int argc, char *argv[])
usage_error:
fprintf(stderr, "Usage: %s -i interface\n", argv[0]);
fprintf(stderr, " [-w savefile] [-s snaplen] [-C file_size]\n");
fprintf(stderr, " [-F file_format] [-p] [-H] [-N] [filter...]\n");
fprintf(stderr, " [-F file_format] [-p] [-H] [-N] [-b filter_buffer] [filter...]\n");
fprintf(stderr, " -i: specify Linux interface (e.g. eth0) or ExaNIC port name (e.g. exanic0:0)\n");
fprintf(stderr, " -w: dump frames to given file in specified format (- for stdout)\n");
fprintf(stderr, " -s: maximum data length to capture\n");
fprintf(stderr, " -C: file size at which to start a new save file (in millions of bytes)\n");
fprintf(stderr, " -F: file format [pcap|erf] (default is pcap)\n");
fprintf(stderr, " -p: do not attempt to put interface in promiscuous mode\n");
fprintf(stderr, " -H: use hardware timestamps (refer to documentation on how to sync clock)\n");
fprintf(stderr, " -N: write nanosecond-resolution pcap format\n\n");
fprintf(stderr, " -N: write nanosecond-resolution pcap format\n");
fprintf(stderr, " -b: read data from specific RX filter buffer number\n\n");
fprintf(stderr, "Filter examples:\n");
fprintf(stderr, " tcp port 80 (to/from tcp port 80)\n");
fprintf(stderr, " host 192.168.0.1 tcp port 80 (to/from 192.168.0.1:80)\n");
Expand Down