[net][sal] Add SAL (socket abstraction layer) framework

components/net/sal_socket/socket/net_sockets.c

@@ -0,0 +1,284 @@
+/*
+ * File      : net_sockets.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2015, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2015-02-17     Bernard      First version
+ * 2018-05-17     ChenYong     Add socket abstraction layer
+ */
+
+#include <dfs.h>
+#include <dfs_file.h>
+#include <dfs_poll.h>
+#include <dfs_net.h>
+
+#include <sys/socket.h>
+
+int accept(int s, struct sockaddr *addr, socklen_t *addrlen)
+{
+    int new_socket = -1;
+    int socket = dfs_net_getsocket(s);
+
+    new_socket = sal_accept(socket, addr, addrlen);
+    if (new_socket != -1)
+    {
+        /* this is a new socket, create it in file system fd */
+        int fd;
+        struct dfs_fd *d;
+
+        /* allocate a fd */
+        fd = fd_new();
+        if (fd < 0)
+        {
+            rt_set_errno(-ENOMEM);
+            sal_closesocket(socket);
+
+            return -1;
+        }
+
+        d = fd_get(fd);
+        if(d)
+        {
+            /* this is a socket fd */
+            d->type = FT_SOCKET;
+            d->path = NULL;
+
+            d->fops = dfs_net_get_fops();
+
+            d->flags = O_RDWR; /* set flags as read and write */
+            d->size = 0;
+            d->pos = 0;
+
+            /* set socket to the data of dfs_fd */
+            d->data = (void *) new_socket;
+
+            /* release the ref-count of fd */
+            fd_put(d);
+
+            return fd;
+        }
+
+        return -1;
+    }
+
+    return -1;
+}
+RTM_EXPORT(accept);
+
+int bind(int s, const struct sockaddr *name, socklen_t namelen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_bind(socket, name, namelen);
+}
+RTM_EXPORT(bind);
+
+int shutdown(int s, int how)
+{
+    int socket;
+    struct dfs_fd *d;
+
+    d = fd_get(s);
+    if (d == NULL)
+    {
+        rt_set_errno(-EBADF);
+
+        return -1;
+    }
+
+    socket = dfs_net_getsocket(s);
+    if (sal_shutdown(socket, how) == 0)
+    {
+        /* socket has been closed, delete it from file system fd */
+        fd_put(d);
+        fd_put(d);
+
+        return 0;
+    }
+
+    return -1;
+
+}
+RTM_EXPORT(shutdown);
+
+int getpeername(int s, struct sockaddr *name, socklen_t *namelen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_getpeername(socket, name, namelen);
+}
+RTM_EXPORT(getpeername);
+
+int getsockname(int s, struct sockaddr *name, socklen_t *namelen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_getsockname(socket, name, namelen);
+}
+RTM_EXPORT(getsockname);
+
+int getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_getsockopt(socket, level, optname, optval, optlen);
+}
+RTM_EXPORT(getsockopt);
+
+int setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_setsockopt(socket, level, optname, optval, optlen);
+}
+RTM_EXPORT(setsockopt);
+
+int connect(int s, const struct sockaddr *name, socklen_t namelen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_connect(socket, name, namelen);
+}
+RTM_EXPORT(connect);
+
+int listen(int s, int backlog)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_listen(socket, backlog);
+}
+RTM_EXPORT(listen);
+
+int recv(int s, void *mem, size_t len, int flags)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_recvfrom(socket, mem, len, flags, NULL, NULL);
+}
+RTM_EXPORT(recv);
+
+int recvfrom(int s, void *mem, size_t len, int flags,
+             struct sockaddr *from, socklen_t *fromlen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_recvfrom(socket, mem, len, flags, from, fromlen);
+}
+RTM_EXPORT(recvfrom);
+
+int send(int s, const void *dataptr, size_t size, int flags)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_sendto(socket, dataptr, size, flags, NULL, 0);
+}
+RTM_EXPORT(send);
+
+int sendto(int s, const void *dataptr, size_t size, int flags,
+           const struct sockaddr *to, socklen_t tolen)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_sendto(socket, dataptr, size, flags, to, tolen);
+}
+RTM_EXPORT(sendto);
+
+int socket(int domain, int type, int protocol)
+{
+    /* create a BSD socket */
+    int fd;
+    int socket;
+    struct dfs_fd *d;
+
+    /* allocate a fd */
+    fd = fd_new();
+    if (fd < 0)
+    {
+        rt_set_errno(-ENOMEM);
+
+        return -1;
+    }
+    d = fd_get(fd);
+
+    /* create socket  and then put it to the dfs_fd */
+    socket = sal_socket(domain, type, protocol);
+    if (socket >= 0)
+    {
+        /* this is a socket fd */
+        d->type = FT_SOCKET;
+        d->path = NULL;
+
+        d->fops = dfs_net_get_fops();
+
+        d->flags = O_RDWR; /* set flags as read and write */
+        d->size = 0;
+        d->pos = 0;
+
+        /* set socket to the data of dfs_fd */
+        d->data = (void *) socket;
+    }
+    else
+    {
+        /* release fd */
+        fd_put(d);
+        fd_put(d);
+
+        rt_set_errno(-ENOMEM);
+
+       return -1;
+    }
+
+    /* release the ref-count of fd */
+    fd_put(d);
+
+    return fd;
+}
+RTM_EXPORT(socket);
+
+int closesocket(int s)
+{
+    int socket = dfs_net_getsocket(s);
+    struct dfs_fd *d;
+
+    d = fd_get(s);
+    if(!d)
+    {
+        return -1;
+    }
+
+    if (sal_closesocket(socket) == 0)
+    {
+        /* socket has been closed, delete it from file system fd */
+        fd_put(d);
+        fd_put(d);
+
+        return 0;
+    }
+
+    return -1;
+}
+RTM_EXPORT(closesocket);
+
+int ioctlsocket(int s, long cmd, void *arg)
+{
+    int socket = dfs_net_getsocket(s);
+
+    return sal_ioctlsocket(socket, cmd, arg);
+}
+RTM_EXPORT(ioctlsocket);