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Diffstat (limited to 'nuttx/net/bind.c')
| -rw-r--r-- | nuttx/net/bind.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/nuttx/net/bind.c b/nuttx/net/bind.c new file mode 100644 index 000000000..da912e017 --- /dev/null +++ b/nuttx/net/bind.c @@ -0,0 +1,197 @@ +/**************************************************************************** + * net/bind.c + * + * Copyright (C) 2007-2009, 2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#ifdef CONFIG_NET + +#include <sys/types.h> +#include <sys/socket.h> +#include <errno.h> + +#include "net_internal.h" + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: psock_bind + * + * Description: + * bind() gives the socket 'psock' the local address 'addr'. 'addr' is + * 'addrlen' bytes long. Traditionally, this is called "assigning a name to + * a socket." When a socket is created with socket, it exists in a name + * space (address family) but has no name assigned. + * + * Parameters: + * psock Socket structure of the socket to bind + * addr Socket local address + * addrlen Length of 'addr' + * + * Returned Value: + * 0 on success; -1 on error with errno set appropriately + * + * EACCES + * The address is protected, and the user is not the superuser. + * EADDRINUSE + * The given address is already in use. + * EINVAL + * The socket is already bound to an address. + * ENOTSOCK + * psock is a descriptor for a file, not a socket. + * + * Assumptions: + * + ****************************************************************************/ + +int psock_bind(FAR struct socket *psock, const struct sockaddr *addr, + socklen_t addrlen) +{ +#if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) +#ifdef CONFIG_NET_IPv6 + FAR const struct sockaddr_in6 *inaddr = (const struct sockaddr_in6 *)addr; +#else + FAR const struct sockaddr_in *inaddr = (const struct sockaddr_in *)addr; +#endif +#endif + + int err; + int ret; + + /* Verify that the psock corresponds to valid, allocated socket */ + + if (!psock || psock->s_crefs <= 0) + { + err = ENOTSOCK; + goto errout; + } + + /* Verify that a valid address has been provided */ + +#ifdef CONFIG_NET_IPv6 + if (addr->sa_family != AF_INET6 || addrlen < sizeof(struct sockaddr_in6)) +#else + if (addr->sa_family != AF_INET || addrlen < sizeof(struct sockaddr_in)) +#endif + { + err = EBADF; + goto errout; + } + + /* Perform the binding depending on the protocol type */ + + switch (psock->s_type) + { +#ifdef CONFIG_NET_TCP + case SOCK_STREAM: + ret = uip_tcpbind(psock->s_conn, inaddr); + psock->s_flags |= _SF_BOUND; + break; +#endif + +#ifdef CONFIG_NET_UDP + case SOCK_DGRAM: + ret = uip_udpbind(psock->s_conn, inaddr); + break; +#endif + + default: + err = EBADF; + goto errout; + } + + /* Was the bind successful */ + + if (ret < 0) + { + err = -ret; + goto errout; + } + + return OK; + +errout: + *get_errno_ptr() = err; + return ERROR; +} + +/**************************************************************************** + * Function: bind + * + * Description: + * bind() gives the socket 'sockfd' the local address 'addr'. 'addr' is + * 'addrlen' bytes long. Traditionally, this is called "assigning a name to + * a socket." When a socket is created with socket, it exists in a name + * space (address family) but has no name assigned. + * + * Parameters: + * sockfd Socket descriptor of the socket to bind + * addr Socket local address + * addrlen Length of 'addr' + * + * Returned Value: + * 0 on success; -1 on error with errno set appropriately + * + * EACCES + * The address is protected, and the user is not the superuser. + * EADDRINUSE + * The given address is already in use. + * EBADF + * sockfd is not a valid descriptor. + * EINVAL + * The socket is already bound to an address. + * ENOTSOCK + * sockfd is a descriptor for a file, not a socket. + * + * Assumptions: + * + ****************************************************************************/ + +int bind(int sockfd, const struct sockaddr *addr, socklen_t addrlen) +{ + /* Make the socket descriptor to the underlying socket structure */ + + FAR struct socket *psock = sockfd_socket(sockfd); + + /* Then let psock_bind do all of the work */ + + return psock_bind(psock, addr, addrlen); +} + +#endif /* CONFIG_NET */ |