test_connection: verify correct seq. number overflow for incoming packets

impl/test/unittest/test_connection.c

@@ -285,5 +285,32 @@ int main(void)
 
 	ASSERT_STATE(expected_state, conn);
 
+	LOG(LVL_INFO, "Generating 15 packets starting from the expected sequence number (4).");
+	LOG(LVL_INFO, "Reception must resume correctly and all packets must be accepted.");
+
+	for(size_t i = 0; i < 15; i++) {
+		// build connection parameters packet
+		header.dst_addr = dut_address;
+		header.src_addr = peer_address;
+		header.msg_type = L2_MSG_TYPE_DATA;
+		header.rx_seq_nr = 0;
+		header.tx_seq_nr = (4+i) % 16; // sequence numbers are valid from 0 to 15
+		header.tx_request = i == 14;
+
+		static_payload[0] = L2_PAYLOAD_TYPE_IPV4;
+		static_payload[1] = i;
+
+		payload_len = 2;
+
+		packet_len = layer2_encode_packet(&header, static_payload, payload_len, packet_buf, sizeof(packet_buf));
+
+		result_t result = connection_handle_packet(&conn, packet_buf, packet_len, &data_packet, &tx_req_rcvd);
+
+		ASSERT_RESULT(OK, result);
+	}
+
+	expected_state.next_expected_seq = 3;
+	ASSERT_STATE(expected_state, conn);
+
 	LOG(LVL_INFO, ">>> All assertions successful.");
 }