ipc: set socket receive buffer

Set the sockets receive buffer size to match the send buffer.  On
FreeBSD without this calls to sendto() will result in an ENOBUFS error
if the message is larger than net.local.dgram.recvspace sysctl.

lib/ipc_socket.c

@@ -112,7 +112,7 @@ set_sock_size(int sockfd, size_t max_msg_size)
 
 	rc = getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &optval, &optlen);
 
-	qb_util_log(LOG_TRACE, "%d: getsockopt(%d, needed:%d) actual:%d",
+	qb_util_log(LOG_TRACE, "%d: getsockopt(%d, SO_SNDBUF, needed:%d) actual:%d",
 		rc, sockfd, max_msg_size, optval);
 
 	/* The optvat <= max_msg_size check is weird...
@@ -126,6 +126,25 @@ set_sock_size(int sockfd, size_t max_msg_size)
 		optlen = sizeof(optval);
 		rc = setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &optval, optlen);
 	}
+
+	if (rc != 0) {
+		return rc;
+	}
+
+	rc = getsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &optval, &optlen);
+
+	qb_util_log(LOG_TRACE, "%d: getsockopt(%d, SO_RCVBUF, needed:%d) actual:%d",
+		rc, sockfd, max_msg_size, optval);
+
+	/* Set the sockets receive buffer size to match the send buffer.  On
+	 * FreeBSD without this calls to sendto() will result in an ENOBUFS error
+	 * if the message is larger than net.local.dgram.recvspace sysctl. */
+	if (rc == 0 && optval <= max_msg_size) {
+		optval = max_msg_size;
+		optlen = sizeof(optval);
+		rc = setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &optval, optlen);
+	}
+
 	return rc;
 }