/**************************************************************************** * net/getsockname.c * * Copyright (C) 2011-2012 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 #include #include #include #include #include #include #include "net.h" #ifdef CONFIG_NET /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Function: getsockname * * Description: * The getsockname() function retrieves the locally-bound name of the * specified socket, stores this address in the sockaddr structure pointed * to by the 'addr' argument, and stores the length of this address in the * object pointed to by the 'addrlen' argument. * * If the actual length of the address is greater than the length of the * supplied sockaddr structure, the stored address will be truncated. * * If the socket has not been bound to a local name, the value stored in * the object pointed to by address is unspecified. * * Parameters: * sockfd Socket descriptor of socket [in] * addr sockaddr structure to receive data [out] * addrlen Length of sockaddr structure [in/out] * * Returned Value: * On success, 0 is returned, the 'addr' argument points to the address * of the socket, and the 'addrlen' argument points to the length of the * address. Otherwise, -1 is returned and errno is set to indicate the error. * Possible errno values that may be returned include: * * EBADF - The socket argument is not a valid file descriptor. * EOPNOTSUPP - The operation is not supported for this socket's protocol. * EINVAL - The socket has been shut down. * * Assumptions: * ****************************************************************************/ int getsockname(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { FAR struct socket *psock = sockfd_socket(sockfd); FAR struct uip_driver_s *dev; #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) #ifdef CONFIG_NET_IPv6 FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr; #else FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr; #endif #endif int err; /* Verify that the sockfd corresponds to valid, allocated socket */ if (!psock || psock->s_crefs <= 0) { err = EBADF; goto errout; } /* Some sanity checking... Shouldn't need this on a buckled up embedded * system (?) */ #ifdef CONFIG_DEBUG if (!addr || !addrlen) { err = EINVAL; goto errout; } #endif /* Check if enough space has been provided for the full address */ #ifdef CONFIG_NET_IPv6 if (*addrlen < sizeof(struct sockaddr_in6)) #else if (*addrlen < sizeof(struct sockaddr_in)) #endif { /* This function is supposed to return the partial address if * a smaller buffer has been provided. This support has not * been implemented. */ err = ENOSYS; goto errout; } /* Set the port number */ switch (psock->s_type) { #ifdef CONFIG_NET_TCP case SOCK_STREAM: { FAR struct tcp_conn_s *tcp_conn = (FAR struct tcp_conn_s *)psock->s_conn; outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */ } break; #endif #ifdef CONFIG_NET_UDP case SOCK_DGRAM: { FAR struct udp_conn_s *udp_conn = (FAR struct udp_conn_s *)psock->s_conn; outaddr->sin_port = udp_conn->lport; /* Already in network byte order */ } break; #endif default: err = EOPNOTSUPP; goto errout; } /* ISSUE: As of this writing, the socket/connection does not know its IP * address. This is because the uIP design is only intended to support * a single network device and, therefore, only the network device knows * the IP address. * * Right now, we can just pick the first network device. But that may * not work in the future. */ netdev_semtake(); dev = g_netdevices; if (!dev) { netdev_semgive(); err = EINVAL; goto errout; } /* Set the address family and the IP address */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) #ifdef CONFIG_NET_IPv6 outaddr->sin_family = AF_INET6; memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipaddr, 16); *addrlen = sizeof(struct sockaddr_in6); #else outaddr->sin_family = AF_INET; outaddr->sin_addr.s_addr = dev->d_ipaddr; *addrlen = sizeof(struct sockaddr_in); #endif #endif netdev_semgive(); /* Return success */ return OK; errout: set_errno(err); return ERROR; } #endif /* CONFIG_NET */