/**************************************************************************** * net/socket/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 #include "netdev/netdev.h" #include "tcp/tcp.h" #include "udp/udp.h" #include "socket/socket.h" #ifdef CONFIG_NET /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Function: get_ipv4_sockname * * Description: * The getsockname() function retrieves the locally-bound name of the * specified PF_NET socket. * * Parameters: * psock Point to the socket structure instance [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: * ****************************************************************************/ #ifdef CONFIG_NET_IPv4 int ipv4_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { FAR struct net_driver_s *dev; #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr; #endif #ifdef CONFIG_NETDEV_MULTINIC in_addr_t lipaddr; in_addr_t ripaddr; #endif /* Check if enough space has been provided for the full address */ if (*addrlen < sizeof(struct sockaddr_in)) { /* This function is supposed to return the partial address if * a smaller buffer has been provided. This support has not * been implemented. */ return -ENOSYS; } /* 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 */ #ifdef CONFIG_NETDEV_MULTINIC lipaddr = tcp_conn->u.ipv4.laddr; ripaddr = tcp_conn->u.ipv4.raddr; #endif } 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 */ #ifdef CONFIG_NETDEV_MULTINIC lipaddr = udp_conn->u.ipv4.laddr; ripaddr = udp_conn->u.ipv4.raddr; #endif } break; #endif default: return -EOPNOTSUPP; } /* The socket/connection does not know its IP address unless * CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only * a single network device and only the network device knows the IP address. */ netdev_semtake(); #ifdef CONFIG_NETDEV_MULTINIC /* Find the device matching the IPv4 address in the connection structure */ dev = netdev_findby_ipv4addr(lipaddr, ripaddr); #else /* There is only one, the first network device in the list. */ dev = g_netdevices; #endif if (!dev) { netdev_semgive(); return -EINVAL; } /* Set the address family and the IP address */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) outaddr->sin_family = AF_INET; outaddr->sin_addr.s_addr = dev->d_ipaddr; *addrlen = sizeof(struct sockaddr_in); #endif netdev_semgive(); /* Return success */ return OK; } #endif /**************************************************************************** * Function: ipv6_getsockname * * Description: * The getsockname() function retrieves the locally-bound name of the * specified PF_NET6 socket. * * Parameters: * psock Point to the socket structure instance [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: * ****************************************************************************/ #ifdef CONFIG_NET_IPv6 int ipv6_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr, FAR socklen_t *addrlen) { FAR struct net_driver_s *dev; #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) FAR struct sockaddr_in6 *outaddr = (FAR struct sockaddr_in6 *)addr; #endif #ifdef CONFIG_NETDEV_MULTINIC net_ipv6addr_t *lipaddr; net_ipv6addr_t *ripaddr; #endif /* Check if enough space has been provided for the full address */ if (*addrlen < sizeof(struct sockaddr_in6)) { /* This function is supposed to return the partial address if * a smaller buffer has been provided. This support has not * been implemented. */ return -ENOSYS; } /* 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->sin6_port = tcp_conn->lport; /* Already in network byte order */ #ifdef CONFIG_NETDEV_MULTINIC lipaddr = &tcp_conn->u.ipv6.laddr; ripaddr = &tcp_conn->u.ipv6.raddr; #endif } 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->sin6_port = udp_conn->lport; /* Already in network byte order */ #ifdef CONFIG_NETDEV_MULTINIC lipaddr = &udp_conn->u.ipv6.laddr; ripaddr = &udp_conn->u.ipv6.raddr; #endif } break; #endif default: return -EOPNOTSUPP; } /* The socket/connection does not know its IP address unless * CONFIG_NETDEV_MULTINIC is selected. Otherwise the design supports only * a single network device and only the network device knows the IP address. */ netdev_semtake(); #ifdef CONFIG_NETDEV_MULTINIC /* Find the device matching the IPv6 address in the connection structure */ dev = netdev_findby_ipv6addr(*lipaddr, *ripaddr); #else /* There is only one, the first network device in the list. */ dev = g_netdevices; #endif if (!dev) { netdev_semgive(); return -EINVAL; } /* Set the address family and the IP address */ #if defined(CONFIG_NET_TCP) || defined(CONFIG_NET_UDP) outaddr->sin6_family = AF_INET6; memcpy(outaddr->sin6_addr.in6_u.u6_addr8, dev->d_ipv6addr, 16); *addrlen = sizeof(struct sockaddr_in6); #endif netdev_semgive(); /* Return success */ return OK; } #endif /**************************************************************************** * 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); int ret; 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 /* Handle by address domain */ switch (psock->s_domain) { #ifdef CONFIG_NET_IPv4 case PF_INET: ret = ipv4_getsockname(psock, addr, addrlen); break; #endif #ifdef CONFIG_NET_IPv6 case PF_INET6: ret = ipv6_getsockname(psock, addr, addrlen); break; #endif case PF_PACKET: default: err = EAFNOSUPPORT; goto errout; } /* Check for failure */ if (ret < 0) { err = -ret; goto errout; } return OK; errout: set_errno(err); return ERROR; } #endif /* CONFIG_NET */