[utest][lwip]add lwip api testcase.

.github/utest/lwip/lwip.cfg

@@ -0,0 +1,20 @@
+# dependencies
+CONFIG_RT_CONSOLEBUF_SIZE=1024
+CONFIG_RT_NAME_MAX=24
+CONFIG_RT_USING_CI_ACTION=y
+
+CONFIG_RT_LWIP_NETIF_LOOPBACK=y
+CONFIG_LWIP_NETIF_LOOPBACK=1
+CONFIG_RT_UTEST_TC_USING_LWIP=y
+CONFIG_RT_UTEST_LWIP_DNS_TEST=y
+CONFIG_RT_UTEST_LWIP_TCP_TEST=y
+CONFIG_RT_UTEST_LWIP_UDP_TEST=y
+CONFIG_RT_UTEST_LWIP_ICMP_TEST=y
+CONFIG_RT_UTEST_LWIP_SOCKET_OPT_TEST=y
+CONFIG_RT_UTEST_LWIP_ADDR_CONV_TEST=y
+CONFIG_RT_UTEST_LWIP_NETIF_TEST=y
+CONFIG_RT_UTEST_LWIP_TCP_PORT=1234
+CONFIG_RT_UTEST_LWIP_UDP_PORT=1235
+CONFIG_RT_UTEST_LWIP_TEST_URL="www.rt-thread.org"
+CONFIG_RT_UTEST_LWIP_TEST_ADDR="180.163.146.111"
+CONFIG_BSP_DRV_EMAC=y

.github/workflows/utest_auto_run.yml

@@ -58,6 +58,9 @@ jobs:
           - platform: { UTEST: "A9",            RTT_BSP: "bsp/qemu-vexpress-a9",      QEMU_ARCH: "arm",     QEMU_MACHINE: "vexpress-a9", SD_FILE: "sd.bin", KERNEL: "standard", "SMP_RUN":"" }
             config_file: "cpp11/cpp11.cfg"
 
+          - platform: { UTEST: "A9",            RTT_BSP: "bsp/qemu-vexpress-a9",      QEMU_ARCH: "arm",     QEMU_MACHINE: "vexpress-a9", SD_FILE: "sd.bin", KERNEL: "standard", "SMP_RUN":"" }
+            config_file: "lwip/lwip.cfg"
+
     env:
       TEST_QEMU_ARCH: ${{ matrix.platform.QEMU_ARCH }}
       TEST_QEMU_MACHINE: ${{ matrix.platform.QEMU_MACHINE }}

Kconfig.utestcases

@@ -23,6 +23,7 @@ rsource "src/klibc/utest/Kconfig"
 
 rsource "components/drivers/audio/utest/Kconfig"
 rsource "components/dfs/utest/Kconfig"
+rsource "components/net/utest/Kconfig"
 
 endif
 

components/net/utest/Kconfig

@@ -0,0 +1,107 @@
+if RT_USING_LWIP
+    menu "LwIP Network Unit Testcase"
+
+    config RT_UTEST_TC_USING_LWIP
+        bool "lwIP API test"
+        help
+            Enable lwIP network stack unit tests including DNS resolution,
+            TCP/UDP socket operations, and network interface tests
+
+        if RT_UTEST_TC_USING_LWIP
+
+            config RT_UTEST_LWIP_DNS_TEST
+                bool "DNS resolution test"
+                default y
+                help
+                    Enable DNS resolution unit tests including gethostbyname()
+                    and gethostbyname_r() functions for hostname to IP resolution,
+                    as well as getaddrinfo() and freeaddrinfo() for address info
+                    retrieval and release. Tests verify successful resolution
+                    without hardcoded IP comparisons.
+
+            config RT_UTEST_LWIP_TCP_TEST
+                bool "TCP socket test"
+                default y
+                help
+                    Enable TCP socket unit tests including client-server communication
+                    with echo functionality, socket creation, binding, listening,
+                    accepting connections, data transmission with varying buffer sizes,
+                    socket options (TCP_NODELAY, SO_REUSEADDR, SO_REUSEPORT),
+                    and connection management (shutdown, close).
+
+            config RT_UTEST_LWIP_UDP_TEST
+                bool "UDP socket test"
+                default y
+                help
+                    Enable UDP socket unit tests including datagram transmission
+                    and reception, client-server echo communication, socket binding
+                    to any port, select() operations with timeout, recvfrom/sendto
+                    functions, and timeout handling for receive operations.
+
+            config RT_UTEST_LWIP_ICMP_TEST
+                bool "ICMP ping test"
+                default y
+                help
+                    Enable ICMP ping unit tests using raw sockets to send
+                    ICMP echo requests and receive echo replies. Tests verify
+                    basic ICMP functionality with loopback address (127.0.0.1).
+
+            config RT_UTEST_LWIP_SOCKET_OPT_TEST
+                bool "Socket options test"
+                default y
+                help
+                    Enable socket options unit tests including setsockopt()
+                    and getsockopt() functions. Tests verify setting and
+                    retrieving socket options such as SO_REUSEADDR.
+
+            config RT_UTEST_LWIP_ADDR_CONV_TEST
+                bool "Address conversion test"
+                default y
+                help
+                    Enable address conversion unit tests including inet_addr()
+                    for converting string IP addresses to binary format and
+                    inet_ntoa() for converting binary addresses back to strings.
+                    Tests verify proper conversion functionality.
+
+            config RT_UTEST_LWIP_NETIF_TEST
+                bool "Network interface management test"
+                default y
+                help
+                    Enable network interface management unit tests including
+                    netif_set_up(), netif_set_down(), and netif_set_default()
+                    functions. Tests verify interface state changes and
+                    default interface configuration.
+
+            config RT_UTEST_LWIP_TCP_PORT
+                int "TCP test port"
+                default 1234
+                range 1024 65535
+                help
+                    Configure the TCP port number for unit test communication.
+                    Must be in the range 1024-65535 to avoid system ports
+
+            config RT_UTEST_LWIP_UDP_PORT
+                int "UDP test port"
+                default 1235
+                range 1024 65535
+                help
+                    Configure the UDP port number for unit test communication.
+                    Must be in the range 1024-65535 to avoid system ports
+
+            config RT_UTEST_LWIP_TEST_URL
+                string "Test domain name"
+                default "www.rt-thread.org"
+                help
+                    Configure the domain name for DNS resolution tests.
+                    This domain will be resolved to verify DNS functionality
+
+            config RT_UTEST_LWIP_TEST_ADDR
+                string "Expected IP address"
+                default "180.163.146.111"
+                help
+                    Configure the expected IP address for DNS resolution verification.
+                    This should match the actual IP of the test domain
+
+        endif
+    endmenu
+endif

components/net/utest/SConscript

@@ -0,0 +1,15 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = []
+CPPPATH = [cwd]
+
+if GetDepend('RT_UTEST_TC_USING_LWIP'):
+    # Add lwIP test source if enabled
+    src += ['tc_lwip.c']
+
+# Define the test group with proper dependencies
+group = DefineGroup('utestcases', src, depend = ['RT_USING_UTESTCASES', 'RT_USING_LWIP'], CPPPATH = CPPPATH)
+
+Return('group')