Fix recvmsg.
@@ -673,7 +673,7 @@ int picoquic_recvmsg(SOCKET_TYPE fd,
bytes_recv = recvmsg(fd, &msg, 0);
- if (bytes_recv > 0) {
+ if (bytes_recv <= 0) {
addr_from->ss_family = 0;
} else {
/* Get the control information */
