add socket wrapper for at framework

you can use at framework to send/recv data in socket API
example: see examples\tcp_through_module_based_at_socket
project: see board\TencentOS_tiny_EVB_MX_Plus\KEIL\tcp_through_module_based_at_socket

net/socket_wrapper/tos_at_socket.c

@@ -0,0 +1,217 @@
+/*----------------------------------------------------------------------------
+ * Tencent is pleased to support the open source community by making TencentOS
+ * available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ * If you have downloaded a copy of the TencentOS binary from Tencent, please
+ * note that the TencentOS binary is licensed under the BSD 3-Clause License.
+ *
+ * If you have downloaded a copy of the TencentOS source code from Tencent,
+ * please note that TencentOS source code is licensed under the BSD 3-Clause
+ * License, except for the third-party components listed below which are
+ * subject to different license terms. Your integration of TencentOS into your
+ * own projects may require compliance with the BSD 3-Clause License, as well
+ * as the other licenses applicable to the third-party components included
+ * within TencentOS.
+ *---------------------------------------------------------------------------*/
+
+#include "tos_at_socket.h"
+#include "tos_at_socket_prv.h"
+#include "sal_module_wrapper.h"
+
+int socket(int domain, int type, int protocol)
+{
+    int pub_fd;
+    sal_proto_t proto;
+
+    protocol = protocol;
+
+    if (domain != AF_INET) {
+        return -1;
+    }
+
+    if (type == SOCK_STREAM) {
+        proto = TOS_SAL_PROTO_TCP;
+    } else if (type == SOCK_DGRAM) {
+        proto = TOS_SAL_PROTO_UDP;
+    } else {
+        return -1;
+    }
+
+    pub_fd = socket_id_alloc();
+    if (pub_fd < 0) {
+        return -1;
+    }
+
+    socket_set_protocol(pub_fd, proto);
+
+    return pub_fd;
+}
+
+static int sockaddr2ip(const struct sockaddr_in *addr_in, char ip[], int ip_len)
+{
+    snprintf(ip, 16, "%u.%u.%u.%u", ((uint8_t *)(&addr_in->sin_addr.s_addr))[0],
+                                    ((uint8_t *)(&addr_in->sin_addr.s_addr))[1],
+                                    ((uint8_t *)(&addr_in->sin_addr.s_addr))[2],
+                                    ((uint8_t *)(&addr_in->sin_addr.s_addr))[3]);
+
+    return 0;
+}
+
+static int sockaddr2port(const struct sockaddr_in *addr_in, char port[], int port_len)
+{
+    snprintf(port, port_len, "%d", htons(addr_in->sin_port));
+
+    return 0;
+}
+
+int connect(int socket, const struct sockaddr *address, socklen_t address_len)
+{
+    int prv_fd;
+    char ip[16], port[8];
+    const struct sockaddr_in *addr_in = (const struct sockaddr_in *)address;
+
+    SOCKET_ID_SANITY_CHECK(socket);
+
+    if (sockaddr2ip(addr_in, ip, sizeof(ip)) != 0) {
+        return -1;
+    }
+
+    if (sockaddr2port(addr_in, port, sizeof(port)) != 0) {
+        return -1;
+    }
+
+    prv_fd = tos_sal_module_connect(ip, port, socket_get_protocol(socket));
+    if (prv_fd < 0) {
+        return -1;
+    }
+
+    socket_set_fd(socket, prv_fd);
+
+    return 0;
+}
+
+int recv(int socket, void *buffer, size_t length, int flags)
+{
+    int total_len = 0, remain_len = length, recv_len;
+
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    if (!(flags & MSG_WAITALL)) {
+        return tos_sal_module_recv(socket_get_fd(socket), buffer, length);
+    }
+
+    while (total_len < length) {
+        recv_len = tos_sal_module_recv(socket_get_fd(socket),
+                                        (uint8_t *)buffer + total_len,
+                                        remain_len);
+
+        if (recv_len <= 0) {
+            continue;
+        }
+
+        remain_len -= recv_len;
+        total_len += recv_len;
+    }
+
+    return length;
+}
+
+int recvfrom(int socket, void *buffer, size_t length, int flags, struct sockaddr *address, socklen_t *address_len)
+{
+    int total_len = 0, remain_len = length, recv_len;
+
+    (void)address;
+    (void)address_len;
+
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    if (!(flags & MSG_WAITALL)) {
+        return tos_sal_module_recvfrom(socket_get_fd(socket), buffer, length);
+    }
+
+    while (total_len < length) {
+        recv_len = tos_sal_module_recvfrom(socket_get_fd(socket),
+                                        (uint8_t *)buffer + total_len,
+                                        remain_len);
+
+        if (recv_len <= 0) {
+            continue;
+        }
+
+        remain_len -= recv_len;
+        total_len += recv_len;
+    }
+
+    return length;
+}
+
+int send(int socket, const void *buffer, size_t length, int flags)
+{
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    return tos_sal_module_send(socket_get_fd(socket), buffer, length);
+}
+
+int sendto(int socket, const void *message, size_t length, int flags, const struct sockaddr *dest_addr, socklen_t dest_len)
+{
+    (void)dest_addr;
+    (void)dest_len;
+
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    return tos_sal_module_send(socket_get_fd(socket), message, length);
+}
+
+int shutdown(int socket, int how)
+{
+    int rc;
+
+    how = how;
+
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    if (socket_id_set_sanity_check(socket)) {
+        rc = tos_sal_module_close(socket_get_fd(socket));
+        if (rc != 0) {
+            return rc;
+        }
+    }
+
+    socket_id_free(socket);
+
+    return 0;
+}
+
+int read(int socket, void *buffer, size_t length)
+{
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    return tos_sal_module_recv(socket_get_fd(socket), buffer, length);
+}
+
+int close(int socket)
+{
+    int rc;
+
+    SOCKET_ID_SANITY_CHECK(socket);
+
+    if (socket_id_set_sanity_check(socket)) {
+        rc = tos_sal_module_close(socket_get_fd(socket));
+        if (rc != 0) {
+            return rc;
+        }
+    }
+
+    socket_id_free(socket);
+
+    return 0;
+}
+
+int write(int socket, const void *buffer, size_t length)
+{
+    SOCKET_ID_SET_SANITY_CHECK(socket);
+
+    return tos_sal_module_send(socket_get_fd(socket), buffer, length);
+}
+