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-rw-r--r--osdep/Phy.hpp7
1 files changed, 4 insertions, 3 deletions
diff --git a/osdep/Phy.hpp b/osdep/Phy.hpp
index 84d154a3..2dcda982 100644
--- a/osdep/Phy.hpp
+++ b/osdep/Phy.hpp
@@ -244,14 +244,12 @@ public:
*/
static inline ZT_PHY_SOCKFD_TYPE getDescriptor(PhySocket *s) throw() { return reinterpret_cast<PhySocketImpl *>(s)->sock; }
-
/**
* @param s Socket object
* @return Pointer to user object
*/
static inline void** getuptr(PhySocket *s) throw() { return &(reinterpret_cast<PhySocketImpl *>(s)->uptr); }
-
/**
* Cause poll() to stop waiting immediately
*
@@ -384,7 +382,10 @@ public:
f = 0; setsockopt(s,IPPROTO_IP,IP_MTU_DISCOVER,&f,sizeof(f));
#endif
#ifdef SO_NO_CHECK
- if (_noCheck) {
+ // For now at least we only set SO_NO_CHECK on IPv4 sockets since some
+ // IPv6 stacks incorrectly discard zero checksum packets. May remove
+ // this restriction later once broken stuff dies more.
+ if ((localAddress->sa_family == AF_INET)&&(_noCheck)) {
f = 1; setsockopt(s,SOL_SOCKET,SO_NO_CHECK,(void *)&f,sizeof(f));
}
#endif