samples: cellular: modem_shell: connect UDP sockets

This commit updates the sample to also connect UDP sockets. UDP sockets are connectionless, however the modem library supports invoking `connect` on a UDP socket to set its peer address. This simplifies the use of send which will internally use the peer address. This also fixes a problem when setting `RAI_NO_DATA` on a UDP socket, since `RAI_NO_DATA` requires the socket to be connected. Signed-off-by: Mirko Covizzi <[email protected]>
nrfconnect · Feb 1, 2024 · b417d0e · b417d0e
1 parent baba310
commit b417d0e
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Showing 2 changed files with 11 additions and 16 deletions.
diff --git a/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst b/doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst
@@ -363,6 +363,12 @@ Cellular samples
     * The MQTT and CoAP overlays to enable the Kconfig option :kconfig:option:`CONFIG_NRF_CLOUD_SEND_SERVICE_INFO_UI`.
       The sample no longer sends a device shadow update for MQTT and CoAP builds; this is now handled by the :ref:`lib_nrf_cloud` library.
     * To use the new :c:struct:`nrf_cloud_location_config` structure when calling the :c:func:`nrf_cloud_location_request` function.
+    * The ``connect`` subcommand to use the :c:func:`connect` function on non-secure datagram sockets.
+      This sets the peer address for the non-secure datagram socket.
+      This fixes a bug where using the ``connect`` subcommand and then using the ``rai_no_data`` option with the ``rai`` subcommand on a non-secure datagram socket would lead to an error.
+      The ``rai_no_data`` option requires the socket to be connected and have a peer address set.
+      This bug is caused by the non-secure datagram socket not being connected when using the ``connect`` subcommand.
+    * The ``send`` subcommand to use the :c:func:`send` function for non-secure datagram sockets that are connected and have a peer address set.
 
 * :ref:`nrf_cloud_multi_service` sample:
 

diff --git a/samples/cellular/modem_shell/src/sock/sock.c b/samples/cellular/modem_shell/src/sock/sock.c
@@ -604,8 +604,10 @@ int sock_open_and_connect(
 		}
 	}
 
-	if (type == SOCK_STREAM || (type == SOCK_DGRAM && secure)) {
-		/* Connect TCP and DTLS socket */
+	if (type == SOCK_STREAM || type == SOCK_DGRAM) {
+		/* Connect TCP or UDP socket.
+		 * UDP socket supports connect for setting peer address.
+		 */
 		err = connect(
 			fd,
 			socket_info->addrinfo->ai_addr,
@@ -689,7 +691,6 @@ static int sock_send(
 	bool data_hex_format)
 {
 	int bytes;
-	int dest_addr_len = 0;
 	int set, res;
 	char packet_number_prefix_str[5];
 
@@ -722,19 +723,7 @@ static int sock_send(
 		}
 	}
 
-	if (socket_info->type == SOCK_DGRAM && !socket_info->secure) {
-		/* UDP */
-		if (socket_info->family == AF_INET) {
-			dest_addr_len = sizeof(struct sockaddr_in);
-		} else if (socket_info->family == AF_INET6) {
-			dest_addr_len = sizeof(struct sockaddr_in6);
-		}
-		bytes = sendto(socket_info->fd, data, length, 0,
-			       socket_info->addrinfo->ai_addr, dest_addr_len);
-	} else {
-		/* TCP, DTLS and raw socket */
-		bytes = send(socket_info->fd, data, length, 0);
-	}
+	bytes = send(socket_info->fd, data, length, 0);
 	if (bytes < 0) {
 		/* Ideally we'd like to log the failure here but non-blocking
 		 * socket causes huge number of failures due to incorrectly