503 lines
15 KiB
C
503 lines
15 KiB
C
/****************************************************************************
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* net/icmpv6/icmpv6_sockif.c
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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 <stdbool.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/net.h>
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#include <socket/socket.h>
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#include "icmpv6/icmpv6.h"
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#include "inet/inet.h"
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#ifdef CONFIG_NET_ICMPv6_SOCKET
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static int icmpv6_setup(FAR struct socket *psock);
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static sockcaps_t icmpv6_sockcaps(FAR struct socket *psock);
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static void icmpv6_addref(FAR struct socket *psock);
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static int icmpv6_netpoll(FAR struct socket *psock,
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FAR struct pollfd *fds, bool setup);
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static int icmpv6_close(FAR struct socket *psock);
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#ifdef CONFIG_NET_SOCKOPTS
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static int icmpv6_getsockopt(FAR struct socket *psock, int level,
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int option, FAR void *value,
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FAR socklen_t *value_len);
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static int icmpv6_setsockopt(FAR struct socket *psock, int level,
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int option, FAR const void *value,
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socklen_t value_len);
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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const struct sock_intf_s g_icmpv6_sockif =
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{
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icmpv6_setup, /* si_setup */
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icmpv6_sockcaps, /* si_sockcaps */
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icmpv6_addref, /* si_addref */
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NULL, /* si_bind */
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NULL, /* si_getsockname */
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NULL, /* si_getpeername */
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NULL, /* si_listen */
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NULL, /* si_connect */
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NULL, /* si_accept */
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icmpv6_netpoll, /* si_poll */
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icmpv6_sendmsg, /* si_sendmsg */
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icmpv6_recvmsg, /* si_recvmsg */
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icmpv6_close, /* si_close */
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icmpv6_ioctl, /* si_ioctl */
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NULL, /* si_socketpair */
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NULL /* si_shutdown */
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#ifdef CONFIG_NET_SOCKOPTS
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, icmpv6_getsockopt /* si_getsockopt */
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, icmpv6_setsockopt /* si_setsockopt */
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#endif
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmpv6_setup
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*
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* Description:
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* Called for socket() to verify that the provided socket type and
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* protocol are usable by this address family. Perform any family-
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* specific socket fields.
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*
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* Input Parameters:
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* psock A pointer to a user allocated socket structure to be
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* initialized.
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*
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* Returned Value:
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* Zero (OK) is returned on success. Otherwise, a negated errno value is
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* returned.
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*
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****************************************************************************/
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static int icmpv6_setup(FAR struct socket *psock)
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{
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/* SOCK_DGRAM or SOCK_CTRL and IPPROTO_ICMP6 are supported */
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if ((psock->s_type == SOCK_DGRAM || psock->s_type == SOCK_CTRL ||
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psock->s_type == SOCK_RAW) && psock->s_proto == IPPROTO_ICMP6)
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{
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/* Allocate the IPPROTO_ICMP6 socket connection structure and save in
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* the new socket instance.
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*/
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FAR struct icmpv6_conn_s *conn = icmpv6_alloc();
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if (conn == NULL)
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{
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/* Failed to reserve a connection structure */
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return -ENOMEM;
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}
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/* Set the reference count on the connection structure.
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* This reference count will be incremented only if the socket is
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* dup'ed
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*/
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DEBUGASSERT(conn->crefs == 0);
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conn->crefs = 1;
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if (psock->s_type != SOCK_RAW)
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{
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memset(&conn->filter, 0xff, sizeof(conn->filter));
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}
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/* Save the pre-allocated connection in the socket structure */
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psock->s_conn = conn;
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return OK;
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}
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else
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{
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return -EPROTONOSUPPORT;
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}
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}
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/****************************************************************************
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* Name: icmpv6_sockcaps
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*
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* Description:
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* Return the bit encoded capabilities of this socket.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose capabilities are being
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* queried.
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*
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* Returned Value:
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* The set of socket cababilities is returned.
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*
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****************************************************************************/
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static sockcaps_t icmpv6_sockcaps(FAR struct socket *psock)
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{
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return SOCKCAP_NONBLOCKING;
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}
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/****************************************************************************
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* Name: icmpv6_addref
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*
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* Description:
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* Increment the reference count on the underlying connection structure.
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*
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* Input Parameters:
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* psock - Socket structure of the socket whose reference count will be
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* incremented.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void icmpv6_addref(FAR struct socket *psock)
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{
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FAR struct icmpv6_conn_s *conn;
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conn = psock->s_conn;
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DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
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conn->crefs++;
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}
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/****************************************************************************
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* Name: icmpv6_netpoll
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*
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* Description:
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* The standard poll() operation redirects operations on socket descriptors
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* to net_poll which, indiectly, calls to function.
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*
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* Input Parameters:
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* psock - An instance of the internal socket structure.
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* fds - The structure describing the events to be monitored, OR NULL if
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* this is a request to stop monitoring events.
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* setup - true: Setup up the poll; false: Teardown the poll
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*
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* Returned Value:
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* 0: Success; Negated errno on failure
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*
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****************************************************************************/
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static int icmpv6_netpoll(FAR struct socket *psock, FAR struct pollfd *fds,
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bool setup)
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{
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/* Check if we are setting up or tearing down the poll */
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if (setup)
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{
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/* Perform the ICMPv6 poll() setup */
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return icmpv6_pollsetup(psock, fds);
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}
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else
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{
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/* Perform the ICMPv6 poll() teardown */
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return icmpv6_pollteardown(psock, fds);
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}
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}
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/****************************************************************************
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* Name: icmpv6_close
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*
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* Description:
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* Performs the close operation on a raw packet socket instance
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*
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* Input Parameters:
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* psock Socket instance
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*
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* Returned Value:
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* 0 on success; a negated errno value is returned on any failure.
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*
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* Assumptions:
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*
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****************************************************************************/
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static int icmpv6_close(FAR struct socket *psock)
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{
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FAR struct icmpv6_conn_s *conn;
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conn = psock->s_conn;
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/* Is this the last reference to the connection structure (there could be\
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* more if the socket was dup'ed).
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*/
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DEBUGASSERT(conn->crefs > 0);
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if (conn->crefs <= 1)
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{
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/* Yes... free any read-ahead data */
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iob_free_queue(&conn->readahead);
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/* Then free the connection structure */
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conn->crefs = 0; /* No more references on the connection */
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icmpv6_free(psock->s_conn); /* Free network resources */
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}
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else
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{
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/* No.. Just decrement the reference count */
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conn->crefs--;
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}
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return OK;
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}
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#ifdef CONFIG_NET_SOCKOPTS
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/****************************************************************************
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* Name: icmpv6_getsockopt_internal
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*
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* Description:
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* icmpv6_getsockopt_internal() sets the ICMPV6-protocol socket option
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* specified by the 'option' argument to the value pointed to by the
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* 'value' argument for the socket specified by the 'psock' argument.
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*
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* See <netinet/in.h> for the a complete list of values of ICMPV6 protocol
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* socket options.
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*
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* Input Parameters:
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* psock Socket structure of socket to operate on
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* option identifies the option to set
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* value Points to the argument value
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* value_len The length of the argument value
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*
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* Returned Value:
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* Returns zero (OK) on success. On failure, it returns a negated errno
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* value to indicate the nature of the error.
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*
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****************************************************************************/
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static int icmpv6_getsockopt_internal(FAR struct socket *psock, int option,
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FAR void *value,
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FAR socklen_t *value_len)
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{
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int ret;
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ninfo("option: %d\n", option);
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if (psock->s_type != SOCK_RAW)
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{
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return ENOPROTOOPT;
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}
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net_lock();
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switch (option)
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{
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case ICMP6_FILTER:
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{
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FAR struct icmpv6_conn_s *conn = psock->s_conn;
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if (*value_len > sizeof(struct icmp6_filter))
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{
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*value_len = sizeof(struct icmp6_filter);
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}
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memcpy(value, &conn->filter, *value_len);
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ret = OK;
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}
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break;
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default:
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nerr("ERROR: Unrecognized ICMPV6 option: %d\n", option);
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ret = -ENOPROTOOPT;
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break;
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}
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net_unlock();
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return ret;
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}
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/****************************************************************************
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* Name: icmpv6_getsockopt
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*
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* Description:
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* icmpv6_getsockopt() retrieve the value for the option specified by the
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* 'option' argument at the protocol level specified by the 'level'
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* argument. If the size of the option value is greater than 'value_len',
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* the value stored in the object pointed to by the 'value' argument will
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* be silently truncated. Otherwise, the length pointed to by the
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* 'value_len' argument will be modified to indicate the actual length
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* of the 'value'.
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*
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* The 'level' argument specifies the protocol level of the option. To
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* retrieve options at the socket level, specify the level argument as
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* SOL_SOCKET.
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*
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* See <sys/socket.h> a complete list of values for the 'option' argument.
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*
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* Input Parameters:
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* psock Socket structure of the socket to query
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* level Protocol level to set the option
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* option identifies the option to get
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* value Points to the argument value
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* value_len The length of the argument value
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*
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****************************************************************************/
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static int icmpv6_getsockopt(FAR struct socket *psock, int level, int option,
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FAR void *value, FAR socklen_t *value_len)
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{
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switch (level)
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{
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case IPPROTO_IPV6:
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return ipv6_getsockopt(psock, option, value, value_len);
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case IPPROTO_ICMPV6:
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return icmpv6_getsockopt_internal(psock, option, value, value_len);
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default:
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nerr("ERROR: Unrecognized ICMPV6 option: %d\n", option);
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return -ENOPROTOOPT;
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}
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}
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/****************************************************************************
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* Name: icmpv6_setsockopt_internal
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*
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* Description:
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* icmpv6_setsockopt_internal() sets the ICMPV6-protocol socket option
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* specified by the 'option' argument to the value pointed to by the
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* 'value' argument for the socket specified by the 'psock' argument.
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*
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* See <netinet/in.h> for the a complete list of values of ICMPV6 protocol
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* socket options.
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*
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* Input Parameters:
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* psock Socket structure of socket to operate on
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* option identifies the option to set
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* value Points to the argument value
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* value_len The length of the argument value
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*
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* Returned Value:
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* Returns zero (OK) on success. On failure, it returns a negated errno
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* value to indicate the nature of the error. See psock_setcockopt() for
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* the list of possible error values.
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*
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****************************************************************************/
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static int icmpv6_setsockopt_internal(FAR struct socket *psock, int option,
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FAR const void *value,
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socklen_t value_len)
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{
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int ret;
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ninfo("option: %d\n", option);
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if (psock->s_type != SOCK_RAW)
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{
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return ENOPROTOOPT;
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}
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net_lock();
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switch (option)
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{
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case ICMP6_FILTER:
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{
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FAR struct icmpv6_conn_s *conn = psock->s_conn;
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if (value_len > sizeof(struct icmp6_filter))
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{
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value_len = sizeof(struct icmp6_filter);
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}
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memcpy(&conn->filter, value, value_len);
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ret = OK;
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}
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break;
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default:
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nerr("ERROR: Unrecognized ICMP6 option: %d\n", option);
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ret = -ENOPROTOOPT;
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break;
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}
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net_unlock();
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return ret;
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}
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/****************************************************************************
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* Name: icmpv6_setsockopt
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*
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* Description:
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* icmpv6_setsockopt() sets the option specified by the 'option' argument,
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* at the protocol level specified by the 'level' argument, to the value
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* pointed to by the 'value' argument for the connection.
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*
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* The 'level' argument specifies the protocol level of the option. To set
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* options at the socket level, specify the level argument as SOL_SOCKET.
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*
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* See <sys/socket.h> a complete list of values for the 'option' argument.
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*
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* Input Parameters:
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* psock Socket structure of the socket to query
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* level Protocol level to set the option
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* option identifies the option to set
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* value Points to the argument value
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* value_len The length of the argument value
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*
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****************************************************************************/
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static int icmpv6_setsockopt(FAR struct socket *psock, int level, int option,
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FAR const void *value, socklen_t value_len)
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{
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switch (level)
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{
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case IPPROTO_IPV6:
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return ipv6_setsockopt(psock, option, value, value_len);
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case IPPROTO_ICMPV6:
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return icmpv6_setsockopt_internal(psock, option, value, value_len);
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default:
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nerr("ERROR: Unrecognized ICMPV6 option: %d\n", option);
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return -ENOPROTOOPT;
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}
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#endif /* CONFIG_NET_ICMPv6_SOCKET */
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