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Add a command line argument to turn off blocking waiting for the user

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to press Ctrl-C (-b).  This allows tests with tight loops of mcgrabs
that can stress the multicast tables.

MFC after:	2 weeks
This commit is contained in:
George V. Neville-Neil 2014-01-16 21:46:43 +00:00
parent 6a187a73c3
commit 2d9872d14e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=260791
1 changed files with 12 additions and 6 deletions
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18
tools/tools/mcgrab/mcgrab.cc
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@ -88,7 +88,7 @@ void usage(string message)
//
// @return 0 for 0K, -1 for error, sets errno
//
void grab(char *interface, struct in_addr *group, int number) {
void grab(char *interface, struct in_addr *group, int number, int block) {
int sock;
@ -138,8 +138,10 @@ void grab(char *interface, struct in_addr *group, int number) {
group->s_addr = htonl(ntohl(group->s_addr) + 1);
}
printf("Press Control-C to exit.\n");
sleep(INT_MAX);
if (block > 0) {
printf("Press Control-C to exit.\n");
sleep(INT_MAX);
}
}
@ -160,11 +162,12 @@ int main(int argc, char**argv)
char* interface = 0; ///< Name of the interface
struct in_addr *group = NULL; ///< the multicast group address
int number = 0; ///< Number of addresses to grab
int block = 1; ///< Do we block or just return?
if (argc != 7)
if ((argc < 7) || (argc > 8))
usage();
while ((ch = getopt(argc, argv, "g:i:n:h")) != -1) {
while ((ch = getopt(argc, argv, "g:i:n:bh")) != -1) {
switch (ch) {
case 'g':
group = new (struct in_addr );
@ -178,12 +181,15 @@ int main(int argc, char**argv)
case 'n':
number = atoi(optarg);
break;
case 'b':
block = 0;
break;
case 'h':
usage(string("Help\n"));
break;
}
}
grab(interface, group, number);
grab(interface, group, number, block);
}