302 lines
9.6 KiB
C
302 lines
9.6 KiB
C
/****************************************************************************
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* net/inet/ipv4_setsockopt.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 <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/net/net.h>
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#include <netinet/in.h>
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#include "netdev/netdev.h"
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#include "netfilter/iptables.h"
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#include "igmp/igmp.h"
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#include "inet/inet.h"
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#include "udp/udp.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_setsockopt
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*
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* Description:
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* ipv4_setsockopt() sets the IPv4-protocol socket option specified by the
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* 'option' argument to the value pointed to by the 'value' argument for
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* 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 IPv4 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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int ipv4_setsockopt(FAR struct socket *psock, int option,
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FAR const void *value, 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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/* With IPv4, the multicast-related socket options are simply an
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* alternative way to access IGMP. That IGMP functionality can also be
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* accessed via IOCTL commands (see netdev/netdev_ioctl.c)
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*
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* REVISIT: Clone the logic from netdev_ioctl.c here.
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*/
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net_lock();
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switch (option)
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{
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#ifdef CONFIG_NET_IGMP
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case IP_MSFILTER: /* Access advanced, full-state filtering API */
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{
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#if 0 /* REVISIT: This is not a proper implementation of IP_MSGFILTER */
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FAR const struct ip_msfilter *imsf;
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FAR struct net_driver_s *dev;
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imsf = (FAR const struct ip_msfilter *)value;
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if (imsf == NULL || value_len < sizeof(struct ip_msfilter))
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{
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nerr("ERROR: Bad value or value_len\n");
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ret = -EINVAL;
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}
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else
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{
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/* Get the device associated with the local interface address */
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dev = netdev_findby_lipv4addr(imsf->imsf_interface.s_addr);
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if (dev == NULL)
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{
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nwarn("WARNING: Could not find device\n");
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ret = -ENODEV;
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}
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else if (imsf->imsf_fmode == MCAST_INCLUDE)
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{
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ret = igmp_joingroup(dev, &imsf->imsf_multiaddr);
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}
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else
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{
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DEBUGASSERT(imsf->imsf_fmode == MCAST_EXCLUDE);
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ret = igmp_leavegroup(dev, &imsf->imsf_multiaddr);
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}
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}
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#else
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ret = -ENOSYS;
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#endif
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}
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break;
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case IP_ADD_MEMBERSHIP: /* Join a multicast group */
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case IP_DROP_MEMBERSHIP: /* Leave a multicast group */
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{
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FAR const struct ip_mreq *mrec;
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FAR struct net_driver_s *dev;
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/* REVISIT: This is not a proper implementation of IP_MSGFILTER */
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mrec = (FAR const struct ip_mreq *)value;
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if (mrec == NULL || value_len < sizeof(struct ip_mreq))
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{
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nerr("ERROR: Bad value or value_len\n");
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ret = -EINVAL;
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}
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else
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{
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/* Use the default network device is imr_interface is
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* INADDRY_ANY.
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*/
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if (mrec->imr_interface.s_addr == INADDR_ANY)
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{
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dev = netdev_default();
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}
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else
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{
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/* Get the device associated with the local interface
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* address
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*/
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dev = netdev_findby_lipv4addr(mrec->imr_interface.s_addr);
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}
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if (dev == NULL)
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{
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nwarn("WARNING: Could not find device\n");
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ret = -ENODEV;
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}
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else if (option == IP_ADD_MEMBERSHIP)
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{
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ret = igmp_joingroup(dev, &mrec->imr_multiaddr);
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}
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else
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{
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ret = igmp_leavegroup(dev, &mrec->imr_multiaddr);
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}
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}
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}
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break;
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#if defined(CONFIG_NET_UDP) && !defined(CONFIG_NET_UDP_NO_STACK)
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case IP_MULTICAST_TTL: /* Set/read the time-to-live value of
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* outgoing multicast packets */
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{
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FAR struct udp_conn_s *conn;
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int ttl;
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if (psock->s_type != SOCK_DGRAM ||
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value == NULL || value_len == 0)
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{
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ret = -EINVAL;
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break;
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}
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ttl = (value_len >= sizeof(int)) ?
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*(FAR int *)value : (int)*(FAR unsigned char *)value;
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if (ttl <= 0 || ttl > 255)
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{
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ret = -EINVAL;
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}
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else
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{
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conn = (FAR struct udp_conn_s *)psock->s_conn;
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conn->ttl = ttl;
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ret = OK;
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}
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}
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break;
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#endif
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/* The following IPv4 socket options are defined, but not implemented */
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case IP_MULTICAST_IF: /* Set local device for a multicast
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* socket */
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case IP_MULTICAST_LOOP: /* Set/read boolean that determines
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* whether sent multicast packets
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* should be looped back to local
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* sockets. */
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case IP_UNBLOCK_SOURCE: /* Unblock previously blocked multicast
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* source */
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case IP_BLOCK_SOURCE: /* Stop receiving multicast data from
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* source */
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case IP_ADD_SOURCE_MEMBERSHIP: /* Join a multicast group; allow receive
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* only from source */
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case IP_DROP_SOURCE_MEMBERSHIP: /* Leave a source-specific group. Stop
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* receiving data from a given multicast
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* group that come from a given source */
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case IP_MULTICAST_ALL: /* Modify the delivery policy of
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* multicast messages bound to
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* INADDR_ANY */
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#warning Missing logic
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nwarn("WARNING: Unimplemented IPv4 option: %d\n", option);
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ret = -ENOSYS;
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break;
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#endif /* CONFIG_NET_IGMP */
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#if defined(CONFIG_NET_UDP) && !defined(CONFIG_NET_UDP_NO_STACK)
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case IP_PKTINFO:
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{
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FAR struct udp_conn_s *conn;
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int enable;
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if (psock->s_type != SOCK_DGRAM ||
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value == NULL || value_len == 0)
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{
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ret = -EINVAL;
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break;
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}
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enable = (value_len >= sizeof(int)) ?
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*(FAR int *)value : (int)*(FAR unsigned char *)value;
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conn = (FAR struct udp_conn_s *)psock->s_conn;
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if (enable)
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{
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conn->flags |= _UDP_FLAG_PKTINFO;
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}
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else
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{
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conn->flags &= ~_UDP_FLAG_PKTINFO;
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}
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ret = OK;
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}
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break;
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#endif
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case IP_TOS:
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{
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FAR struct socket_conn_s *conn =
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(FAR struct socket_conn_s *)psock->s_conn;
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int tos;
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tos = (value_len >= sizeof(int)) ?
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*(FAR int *)value : (int)*(FAR unsigned char *)value;
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if (tos < 0 || tos > 0xff)
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{
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nerr("ERROR: invalid tos:%d\n", tos);
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ret = -EINVAL;
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}
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else
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{
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conn->s_tos = tos;
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ret = OK;
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}
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}
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break;
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#ifdef CONFIG_NET_IPTABLES
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case IPT_SO_SET_REPLACE:
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ret = ipt_setsockopt(psock, option, value, value_len);
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break;
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#endif
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default:
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nerr("ERROR: Unrecognized IPv4 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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#endif /* CONFIG_NET_IPv4 */
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