172 lines
4.8 KiB
C
172 lines
4.8 KiB
C
/****************************************************************************
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* net/inet/ipv4_getsockname.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <nuttx/net/net.h>
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#include <nuttx/net/netdev.h>
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#include "netdev/netdev.h"
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#include "udp/udp.h"
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#include "tcp/tcp.h"
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#include "inet/inet.h"
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#ifdef CONFIG_NET_IPv4
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ipv4_getsockname
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*
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* Description:
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* The ipv4_getsockname() function retrieves the locally-bound name of the
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* specified PF_NET socket.
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*
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* Input Parameters:
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* psock Point to the socket structure instance [in]
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* addr sockaddr structure to receive data [out]
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* addrlen Length of sockaddr structure [in/out]
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*
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* Returned Value:
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* On success, 0 is returned, the 'addr' argument points to the address
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* of the socket, and the 'addrlen' argument points to the length of the
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* address. Otherwise, a negated errno value is returned. See
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* getsockname() for the list of returned error values.
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*
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****************************************************************************/
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int ipv4_getsockname(FAR struct socket *psock, FAR struct sockaddr *addr,
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FAR socklen_t *addrlen)
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{
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#if defined(NET_TCP_HAVE_STACK) || defined(NET_UDP_HAVE_STACK)
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FAR struct sockaddr_in *outaddr = (FAR struct sockaddr_in *)addr;
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FAR struct net_driver_s *dev;
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in_addr_t lipaddr;
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in_addr_t ripaddr;
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/* Check if enough space has been provided for the full address */
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if (*addrlen < sizeof(struct sockaddr_in))
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{
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/* This function is supposed to return the partial address if
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* a smaller buffer has been provided. This support has not
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* been implemented.
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*/
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return -ENOSYS;
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}
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/* Set the port number */
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switch (psock->s_type)
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{
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#ifdef NET_TCP_HAVE_STACK
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case SOCK_STREAM:
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{
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FAR struct tcp_conn_s *tcp_conn = psock->s_conn;
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outaddr->sin_port = tcp_conn->lport; /* Already in network byte order */
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lipaddr = tcp_conn->u.ipv4.laddr;
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ripaddr = tcp_conn->u.ipv4.raddr;
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}
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break;
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#endif
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#ifdef NET_UDP_HAVE_STACK
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case SOCK_DGRAM:
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{
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FAR struct udp_conn_s *udp_conn = psock->s_conn;
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outaddr->sin_port = udp_conn->lport; /* Already in network byte order */
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lipaddr = udp_conn->u.ipv4.laddr;
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ripaddr = udp_conn->u.ipv4.raddr;
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}
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break;
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#endif
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default:
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return -EOPNOTSUPP;
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}
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if (lipaddr == 0)
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{
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outaddr->sin_family = psock->s_domain;
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outaddr->sin_addr.s_addr = 0;
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memset(outaddr->sin_zero, 0, sizeof(outaddr->sin_zero));
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*addrlen = sizeof(struct sockaddr_in);
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return OK;
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}
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net_lock();
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/* Find the device matching the IPv4 address in the connection structure.
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* NOTE: listening sockets have no ripaddr. Work around is to use the
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* lipaddr when ripaddr is not available.
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*/
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if (ripaddr == 0)
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{
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ripaddr = lipaddr;
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}
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dev = netdev_findby_ripv4addr(lipaddr, ripaddr);
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if (dev == NULL)
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{
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net_unlock();
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return -EINVAL;
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}
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/* Set the address family and the IP address */
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outaddr->sin_family = psock->s_domain;
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outaddr->sin_addr.s_addr = dev->d_ipaddr;
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memset(outaddr->sin_zero, 0, sizeof(outaddr->sin_zero));
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*addrlen = sizeof(struct sockaddr_in);
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net_unlock();
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/* Return success */
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return OK;
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#else
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return -EOPNOTSUPP;
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#endif
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}
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#endif /* CONFIG_NET_IPv4 */
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