IP_MTU_DISCOVER: Sets or receives the Path MTU Discovery setting for a socket. When enabled, Linux will perform Path MTU Discovery as defined in RFC 1191 on this socket. The don’t fragment flag is set on all outgoing datagrams. The system-wide default is controlled by the ip_no_pmtu_disc sysctl for SOCK_STREAM sockets, and disabled on all others.
31 rows · IP_DONTFRAGMENT: yes: yes: DWORD (boolean) Indicates that data should not be.
Machine 2: it is set to 1 Don’t Fragment: SET. So this led me to try and explicitly set it myself using: This Stack Question. and. int val = 1 setsockopt (sd, IPPROTO_IP, IP_DONTFRAGMENT, (char *)&val, sizeof (val)) But it has no effect what so ever with the result always being Don’t Fragment: Not SET.
5/10/2018 · err = setsockopt (s, level, IP_DONTFRAGMENT, (char *) &value, size) ok(!err, Expected 0, got %d with error %dn, err, GetLastError()) value = 0xdead err = getsockopt(s, level, IP_DONTFRAGMENT, (char *) &value, &size) ok(!err, Expected 0, got %d with error %dn, err, GetLastError()) ok(value == 0, Expected 0, got %dn, value) closesocket(s), 15 rows · Fragmentation with getsockopt and setsockopt . The IP_DONTFRAGMENT socket option,.
After starting the server using wine, it runs fine for a few hours. But after some time these two errors start to appear: fixme:winsock:WS_ setsockopt IP_DONTFRAGMENT is silently ignored! err:winsock:interface_bind Failed to bind to interface, receiving broadcast packets will not work on socket 0690. “`and the server is no longer reachable/listed …
setsockopt . setsockopt , and the corresponding getsockopt, can be used to get and set options for a socket. Use getsockopt to determine socket options. Use setsockopt to set socket options. The new value remains until it is modified again.
ret = setsockopt (s, IPPROTO_IP, IP_OPTIONS, (char *)&opthdr, sizeof (opthdr)) Once the option is set, it applies to any packets sent on the given socket. At any pointer thereafter, you can call getsockopt() with IP_OPTIONS to retrieve which options were set however, this will not return any data filled into the option-specific buffers.
