socket-util: add common API for querying socket MTU

2020-12-07 13:46:35 +01:00
parent 4e25d4cf0f
commit 52975f8672
2 changed files with 34 additions and 0 deletions
@@ -299,3 +299,5 @@ static inline int socket_set_transparent(int fd, int af, bool b) {
 static inline int socket_set_recvfragsize(int fd, int af, bool b) {
        return socket_set_option(fd, af, IP_RECVFRAGSIZE, IPV6_RECVFRAGSIZE, b);
 }
+
+int socket_get_mtu(int fd, int af, size_t *ret);