glenux/igmpgen
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feat: prepare group & packet version/type argument handling

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Glenn Y. Rolland 2023-12-26 10:51:36 +01:00
parent 5813cd1e72
commit a93a54a014
1 changed files with 16 additions and 9 deletions
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25
src/igmpgen.c
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@ -21,12 +21,13 @@ struct igmp_extra {
{ 2, "query", 0x11, 1, "224.0.0.1", 0 }, { 2, "query", 0x11, 1, "224.0.0.1", 0 },
{ 2, "report", 0x16, 1, "224.0.0.2", 1 }, { 2, "report", 0x16, 1, "224.0.0.2", 1 },
{ 2, "leave", 0x17, 1, "224.0.0.2", 0 }, { 2, "leave", 0x17, 1, "224.0.0.2", 0 },
/* Note: end of list (please keep) */
{ 0, 0, 0, 0 }, { 0, 0, 0, 0 },
}; };
void usage(char *name) void usage(char *name)
{ {
fprintf(stderr, "usage: %s -i ethdevice\n", name); fprintf(stderr, "usage: %s -i ethdevice -g group -t packet.version\n", name);
} }
int main(int argc, char **argv) int main(int argc, char **argv)
@ -37,7 +38,7 @@ int main(int argc, char **argv)
/* libnet stuff */ /* libnet stuff */
char neterr[LIBNET_ERRBUF_SIZE]; char neterr[LIBNET_ERRBUF_SIZE];
libnet_t * netcontext = NULL; libnet_t *netcontext = NULL;
char *device = NULL; char *device = NULL;
/* misc */ /* misc */
@ -45,7 +46,7 @@ int main(int argc, char **argv)
printf("IGMP packet generator\n\n"); printf("IGMP packet generator\n\n");
printf("Parsing command line...\n"); printf("Parsing command line...\n");
while((c = getopt(argc, argv, "i:")) != EOF) while((c = getopt(argc, argv, "i:g:t:")) != EOF)
{ {
switch (c) switch (c)
{ {
@ -53,7 +54,14 @@ int main(int argc, char **argv)
printf(" Net interface = [%s]\n", optarg); printf(" Net interface = [%s]\n", optarg);
device = optarg; device = optarg;
break; break;
case 'g':
/* Group argument handling */
printf(" Group = [%s]\n", optarg);
break;
case 't':
/* Packet version/type argument handling */
printf(" Packet version/type = [%s]\n", optarg);
break;
default: default:
usage(argv[0]); usage(argv[0]);
exit(1); exit(1);
@ -67,13 +75,11 @@ int main(int argc, char **argv)
printf("done\n"); printf("done\n");
/* /* Memory initialization */
* Memory initialization
*/
printf("Initializing libnet context..."); printf("Initializing libnet context...");
netcontext = libnet_init(LIBNET_RAW4, device, neterr); netcontext = libnet_init(LIBNET_RAW4, device, neterr);
if (!netcontext){ if (!netcontext){
fprintf(stderr,neterr); fprintf(stderr, neterr);
exit(1); exit(1);
} }
libnet_clear_packet(netcontext); libnet_clear_packet(netcontext);
@ -85,6 +91,7 @@ int main(int argc, char **argv)
printf("done\n"); printf("done\n");
/* Clean up and exit */
libnet_destroy(netcontext);
return 0; return 0;
} }