/**************************************************************************** * net/socket/bind.c * * Copyright (C) 2007-2009, 2012, 2014-2015 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * 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 #ifdef CONFIG_NET #include #include #include #include #include #include #ifdef CONFIG_NET_PKT # include #endif #include #include #include "socket/socket.h" #include "netdev/netdev.h" #include "tcp/tcp.h" #include "udp/udp.h" #include "pkt/pkt.h" #include "local/local.h" /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Function: pkt_bind * * Description: * Bind a raw socket to an network device. * * Parameters: * conn AF_PACKET connection structure * addr Peer address information * * Returned Value: * 0 on success; -1 on error with errno set appropriately * ****************************************************************************/ #ifdef CONFIG_NET_PKT static int pkt_bind(FAR struct pkt_conn_s *conn, FAR const struct sockaddr_ll *addr) { int ifindex; #if 0 char hwaddr[6] = {0x00, 0xa1, 0xb1, 0xc1, 0xd1, 0xe1}; /* our MAC for debugging */ #endif char hwaddr[6] = {0x00, 0xe0, 0xde, 0xad, 0xbe, 0xef}; /* MAC from ifconfig */ /* Look at the addr and identify network interface */ ifindex = addr->sll_ifindex; #if 0 /* Get the MAC address of that interface */ memcpy(hwaddr, g_netdevices->d_mac, 6); #endif /* Put ifindex and mac address into connection */ conn->ifindex = ifindex; memcpy(conn->lmac, hwaddr, 6); return OK; } #endif /* CONFIG_NET_PKT */ /**************************************************************************** * Public 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) { #ifdef CONFIG_NET_PKT FAR const struct sockaddr_ll *lladdr = (const struct sockaddr_ll *)addr; #endif socklen_t minlen; int err; int ret = OK; /* 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 */ switch (addr->sa_family) { #ifdef CONFIG_NET_IPv4 case AF_INET: minlen = sizeof(struct sockaddr_in); break; #endif #ifdef CONFIG_NET_IPv6 case AF_INET6: minlen = sizeof(struct sockaddr_in6); break; #endif #ifdef CONFIG_NET_LOCAL case AF_LOCAL: minlen = sizeof(sa_family_t); break; #endif #ifdef CONFIG_NET_PKT case AF_PACKET: minlen = sizeof(struct sockaddr_ll); break; #endif default: ndbg("ERROR: Unrecognized address family: %d\n", addr->sa_family); err = EAFNOSUPPORT; goto errout; } if (addrlen < minlen) { ndbg("ERROR: Invalid address length: %d < %d\n", addrlen, minlen); err = EBADF; goto errout; } /* Perform the binding depending on the protocol type */ switch (psock->s_type) { #ifdef CONFIG_NET_PKT case SOCK_RAW: ret = pkt_bind(psock->s_conn, lladdr); break; #endif /* Bind a stream socket which may either be TCP/IP or a local, Unix * domain socket. */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_LOCAL_STREAM) case SOCK_STREAM: { #ifdef CONFIG_NET_LOCAL_STREAM #ifdef CONFIG_NET_TCP /* Is this a Unix domain socket? */ if (psock->s_domain == PF_LOCAL) #endif { /* Bind the Unix domain connection structure */ ret = psock_local_bind(psock, addr, addrlen); } #endif /* CONFIG_NET_LOCAL_STREAM */ #ifdef CONFIG_NET_TCP #ifdef CONFIG_NET_LOCAL_STREAM else #endif { /* Bind the TCP/IP connection structure */ ret = tcp_bind(psock->s_conn, addr); } #endif /* CONFIG_NET_TCP */ /* Mark the socket bound */ if (ret >= 0) { psock->s_flags |= _SF_BOUND; } } break; #endif /* CONFIG_NET_TCP || CONFIG_NET_LOCAL_STREAM */ /* Bind a datagram socket which may either be TCP/IP or a local, Unix * domain socket. */ #if defined(CONFIG_NET_UDP) || defined(CONFIG_NET_LOCAL_DGRAM) case SOCK_DGRAM: { #ifdef CONFIG_NET_LOCAL_DGRAM #ifdef CONFIG_NET_UDP /* Is this a Unix domain socket? */ if (psock->s_domain == PF_LOCAL) #endif { /* Bind the Unix domain connection structure */ ret = psock_local_bind(psock, addr, addrlen); } #endif /* CONFIG_NET_LOCAL_DGRAM */ #ifdef CONFIG_NET_UDP #ifdef CONFIG_NET_LOCAL_DGRAM else #endif { /* Bind the UDPP/IP connection structure */ ret = udp_bind(psock->s_conn, addr); } #endif /* CONFIG_NET_UDP */ /* Mark the socket bound */ if (ret >= 0) { psock->s_flags |= _SF_BOUND; } } break; #endif /* CONFIG_NET_UDP || CONFIG_NET_LOCAL_DGRAM */ 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 */