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Not all systems have the IP_MTU_DISCOVER sockopt

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Matthieu Herrb 2015-09-29 19:18:07 +02:00
parent d625d804c6
commit 77734c3cb7
1 changed files with 2 additions and 1 deletions
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3
echoc.c
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@ -167,6 +167,7 @@ main(int argc, char *argv[])
if (buf == NULL) if (buf == NULL)
err(2, "malloc receive buffer"); err(2, "malloc receive buffer");
#ifdef IP_MTU_DISCOVER
/* set the DF flag ? */ /* set the DF flag ? */
if (nofragment) if (nofragment)
ch = IP_PMTUDISC_DO; ch = IP_PMTUDISC_DO;
@ -174,7 +175,7 @@ main(int argc, char *argv[])
ch = IP_PMTUDISC_DONT; ch = IP_PMTUDISC_DONT;
if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &ch, sizeof(ch)) < 0) if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &ch, sizeof(ch)) < 0)
err(2, "setsockopt IP_MTU_DISCOVER"); err(2, "setsockopt IP_MTU_DISCOVER");
#endif
while (1) { while (1) {
/* poll() loop to handle interruptions by SIGALRM */ /* poll() loop to handle interruptions by SIGALRM */
while (1) { while (1) {