Implement part of Berkeley Socket API for libc-wasi (#1036)

Refer to [Networking API design](https://github.com/WebAssembly/WASI/issues/370) and [feat(socket): berkeley socket API v2](https://github.com/WebAssembly/WASI/pull/459): - Support the socket API of synchronous mode, including `socket/bind/listen/accept/send/recv/close/shutdown`, the asynchronous mode isn't supported yet. - Support adding `--addr-pool=<pool1,pool2,..>` argument for command line to identify the valid ip address range - Add socket-api sample and update the document
2022-03-10 15:13:38 +08:00
parent 0065743075
commit 9c87a1ee17
28 changed files with 2211 additions and 214 deletions
--- a/samples/socket-api/wasm-src/CMakeLists.txt
+++ b/samples/socket-api/wasm-src/CMakeLists.txt
@ -0,0 +1,80 @@
+# Copyright (C) 2019 Intel Corporation.  All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+cmake_minimum_required(VERSION 2.8...3.18)
+project(socket_api_sample_wasm_app)
+
+message(CHECK_START "Detecting WABT")
+if(NOT (DEFINED WABT_DIR OR DEFINED CACHE{WABT_DIR}))
+  find_path(WABT_DIR
+    wabt
+    PATHS /opt
+    NO_DEFAULT_PATH
+    NO_CMAKE_FIND_ROOT_PATH
+  )
+  if(DEFINED WABT_DIR)
+    set(WABT_DIR ${WABT_DIR}/wabt)
+  endif()
+endif()
+if(WABT_DIR)
+  message(CHECK_PASS "found")
+else()
+  message(CHECK_FAIL "not found")
+endif()
+
+message(CHECK_START "Detecting WASM_OBJDUMP at ${WABT_DIR}")
+find_program(WASM_OBJDUMP
+  wasm-objdump
+  PATHS "${WABT_DIR}/bin"
+  NO_DEFAULT_PATH
+  NO_CMAKE_FIND_ROOT_PATH
+)
+if(WASM_OBJDUMP)
+  message(CHECK_PASS "found")
+else()
+  message(CHECK_FAIL "not found")
+endif()
+
+set(SRC ${CMAKE_CURRENT_SOURCE_DIR})
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../core/iwasm/libraries/lib-socket/lib_socket_wasi.cmake)
+
+function(COMPILE_WITH_CLANG SOURCE_FILE)
+  get_filename_component(FILE_NAME ${SOURCE_FILE} NAME_WLE)
+
+  set(WASM_MODULE ${FILE_NAME}.wasm)
+
+  set(MAIN_TARGET_NAME MODULE_${FILE_NAME})
+
+  add_executable(${MAIN_TARGET_NAME} ${SOURCE_FILE})
+  set_target_properties(${MAIN_TARGET_NAME} PROPERTIES OUTPUT_NAME ${WASM_MODULE})
+  target_include_directories(${MAIN_TARGET_NAME} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/inc)
+  target_compile_options(${MAIN_TARGET_NAME} INTERFACE -pthread)
+  target_link_libraries(${MAIN_TARGET_NAME} socket_wasi_ext)
+  target_link_options(${MAIN_TARGET_NAME} PRIVATE
+    LINKER:--export=__heap_base
+    LINKER:--export=__data_end
+    LINKER:--shared-memory,--max-memory=196608
+    LINKER:--no-check-features
+    LINKER:--allow-undefined
+  )
+
+  if(EXISTS ${WASM_OBJDUMP})
+    message(STATUS "Dumping ${WASM_MODULE}...")
+    set(WASM_DUMP ${WASM_MODULE}.dump)
+    set(DUMP_TARGET_NAME DUMP_${FILE_NAME})
+
+    add_custom_command(OUTPUT ${WASM_DUMP}
+      COMMAND ${WASM_OBJDUMP} -dx ${WASM_MODULE} > ${WASM_DUMP}
+      COMMENT "Dumping ${WASM_MODULE}..."
+      DEPENDS ${MAIN_TARGET_NAME}
+    )
+
+    add_custom_target(${DUMP_TARGET_NAME} ALL
+      DEPENDS ${WASM_DUMP}
+    )
+  endif()
+endfunction()
+
+compile_with_clang(tcp_server.c)
+compile_with_clang(tcp_client.c)
--- a/samples/socket-api/wasm-src/inc/.gitkeep
+++ b/samples/socket-api/wasm-src/inc/.gitkeep
--- a/samples/socket-api/wasm-src/tcp_client.c
+++ b/samples/socket-api/wasm-src/tcp_client.c
@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#ifdef __wasi__
+#include <wasi_socket_ext.h>
+#endif
+
+int
+main(int argc, char *argv[])
+{
+    int socket_fd, ret, total_size = 0;
+    char buffer[1024] = { 0 };
+    struct sockaddr_in server_address = { 0 };
+
+    printf("[Client] Create socket\n");
+    socket_fd = socket(AF_INET, SOCK_STREAM, 0);
+    if (socket_fd == -1) {
+        perror("Create socket failed");
+        return EXIT_FAILURE;
+    }
+
+    /* 127.0.0.1:1234 */
+    server_address.sin_family = AF_INET;
+    server_address.sin_port = htons(1234);
+    server_address.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+    printf("[Client] Connect socket\n");
+    if (connect(socket_fd, (struct sockaddr *)&server_address,
+                sizeof(server_address))
+        == -1) {
+        perror("Connect failed");
+        close(socket_fd);
+        return EXIT_FAILURE;
+    }
+
+    printf("[Client] Client receive\n");
+    while (1) {
+        ret = recv(socket_fd, buffer + total_size, sizeof(buffer) - total_size,
+                   0);
+        if (ret <= 0)
+            break;
+        total_size += ret;
+    }
+
+    printf("[Client] %d bytes received:\n", total_size);
+    if (total_size > 0) {
+        printf("Buffer recieved:\n%s\n", buffer);
+    }
+
+    close(socket_fd);
+    printf("[Client] BYE \n");
+    return EXIT_SUCCESS;
+}
--- a/samples/socket-api/wasm-src/tcp_server.c
+++ b/samples/socket-api/wasm-src/tcp_server.c
@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <pthread.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#ifdef __wasi__
+#include <wasi_socket_ext.h>
+#endif
+
+#define WORKER_NUM 5
+
+void *
+run(void *arg)
+{
+    const char *message = "Say Hi from the Server\n";
+    int new_socket = *(int *)arg;
+    int i;
+
+    printf("[Server] Communicate with the new connection #%u @ %p ..\n",
+           new_socket, (void *)(uintptr_t)pthread_self());
+
+    for (i = 0; i < 5; i++) {
+        if (send(new_socket, message, strlen(message), 0) < 0) {
+            perror("Send failed");
+            break;
+        }
+    }
+
+    printf("[Server] Shuting down the new connection #%u ..\n", new_socket);
+    shutdown(new_socket, SHUT_RDWR);
+
+    return NULL;
+}
+
+int
+main(int argc, char *argv[])
+{
+    int socket_fd = -1, addrlen = 0;
+    struct sockaddr_in addr = { 0 };
+    unsigned connections = 0;
+    pthread_t workers[WORKER_NUM] = { 0 };
+    int client_sock_fds[WORKER_NUM] = { 0 };
+
+    printf("[Server] Create socket\n");
+    socket_fd = socket(AF_INET, SOCK_STREAM, 0);
+    if (socket_fd < 0) {
+        perror("Create socket failed");
+        goto fail;
+    }
+
+    /* 0.0.0.0:1234 */
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(1234);
+    addr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    printf("[Server] Bind socket\n");
+    addrlen = sizeof(addr);
+    if (bind(socket_fd, (struct sockaddr *)&addr, addrlen) < 0) {
+        perror("Bind failed");
+        goto fail;
+    }
+
+    printf("[Server] Listening on socket\n");
+    if (listen(socket_fd, 3) < 0) {
+        perror("Listen failed");
+        goto fail;
+    }
+
+    printf("[Server] Wait for clients to connect ..\n");
+    while (connections < WORKER_NUM) {
+        client_sock_fds[connections] =
+            accept(socket_fd, (struct sockaddr *)&addr, (socklen_t *)&addrlen);
+        if (client_sock_fds[connections] < 0) {
+            perror("Accept failed");
+            break;
+        }
+
+        printf("[Server] Client connected\n");
+        if (pthread_create(&workers[connections], NULL, run,
+                           &client_sock_fds[connections])) {
+            perror("Create a worker thread failed");
+            shutdown(client_sock_fds[connections], SHUT_RDWR);
+            break;
+        }
+
+        connections++;
+    }
+
+    if (connections == WORKER_NUM) {
+        printf("[Server] Achieve maximum amount of connections\n");
+    }
+
+    for (int i = 0; i < WORKER_NUM; i++) {
+        pthread_join(workers[i], NULL);
+    }
+
+    printf("[Server] Shuting down ..\n");
+    shutdown(socket_fd, SHUT_RDWR);
+    sleep(3);
+    printf("[Server] BYE \n");
+    return EXIT_SUCCESS;
+
+fail:
+    printf("[Server] Shuting down ..\n");
+    if (socket_fd >= 0)
+        close(socket_fd);
+    sleep(3);
+    return EXIT_FAILURE;
+}