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Fragmentation is allowed only if packet size exceeds the outgoing interface MTU

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This commit is contained in:
Frank Denis 2014-04-12 13:39:05 -07:00
parent ae6b9034b2
commit 22b6cb6c38
1 changed files with 4 additions and 1 deletions
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dnsblast.c
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@ -197,7 +197,10 @@ get_sock(const char * const host, const char * const port,
&(int[]) { MAX_UDP_BUFFER_SIZE }, sizeof (int));
setsockopt(sock, SOL_SOCKET, SO_SNDBUFFORCE,
&(int[]) { MAX_UDP_BUFFER_SIZE }, sizeof (int));
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
#if defined(IP_PMTUDISC_OMIT)
setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER,
&(int[]) { IP_PMTUDISC_OMIT }, sizeof (int));
#elif defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER,
&(int[]) { IP_PMTUDISC_DONT }, sizeof (int));
#elif defined(IP_DONTFRAG)