/**************************************************************************** * net/inet/ipv4_setsockopt.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include "netdev/netdev.h" #include "igmp/igmp.h" #include "inet/inet.h" #include "udp/udp.h" #ifdef CONFIG_NET_IPv4 /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: ipv4_setsockopt * * Description: * ipv4_setsockopt() sets the IPv4-protocol socket option specified by the * 'option' argument to the value pointed to by the 'value' argument for * the socket specified by the 'psock' argument. * * See for the a complete list of values of IPv4 protocol * socket options. * * Input Parameters: * psock Socket structure of socket to operate on * option identifies the option to set * value Points to the argument value * value_len The length of the argument value * * Returned Value: * Returns zero (OK) on success. On failure, it returns a negated errno * value to indicate the nature of the error. See psock_setcockopt() for * the list of possible error values. * ****************************************************************************/ int ipv4_setsockopt(FAR struct socket *psock, int option, FAR const void *value, socklen_t value_len) { #ifdef CONFIG_NET_IGMP int ret; ninfo("option: %d\n", option); /* With IPv4, the multicast-related socket options are simply an * alternative way to access IGMP. That IGMP functionality can also be * accessed via IOCTL commands (see netdev/netdev_ioctl.c) * * REVISIT: Clone the logic from netdev_ioctl.c here. */ net_lock(); switch (option) { case IP_MSFILTER: /* Access advanced, full-state filtering API */ { #if 0 /* REVISIT: This is not a proper implementation of IP_MSGFILTER */ FAR const struct ip_msfilter *imsf; FAR struct net_driver_s *dev; imsf = (FAR const struct ip_msfilter *)value; if (imsf == NULL || value_len < sizeof(struct ip_msfilter)) { nerr("ERROR: Bad value or value_len\n"); ret = -EINVAL; } else { /* Get the device associated with the local interface address */ dev = netdev_findby_lipv4addr(imsf->imsf_interface.s_addr); if (dev == NULL) { nwarn("WARNING: Could not find device\n"); ret = -ENODEV; } else if (imsf->imsf_fmode == MCAST_INCLUDE) { ret = igmp_joingroup(dev, &imsf->imsf_multiaddr); } else { DEBUGASSERT(imsf->imsf_fmode == MCAST_EXCLUDE); ret = igmp_leavegroup(dev, &imsf->imsf_multiaddr); } } #else ret = -ENOSYS; #endif } break; case IP_ADD_MEMBERSHIP: /* Join a multicast group */ case IP_DROP_MEMBERSHIP: /* Leave a multicast group */ { FAR const struct ip_mreq *mrec; FAR struct net_driver_s *dev; /* REVISIT: This is not a proper implementation of IP_MSGFILTER */ mrec = (FAR const struct ip_mreq *)value; if (mrec == NULL || value_len < sizeof(struct ip_mreq)) { nerr("ERROR: Bad value or value_len\n"); ret = -EINVAL; } else { /* Use the default network device is imr_interface is * INADDRY_ANY. */ if (mrec->imr_interface.s_addr == INADDR_ANY) { dev = netdev_default(); } else { /* Get the device associated with the local interface * address */ dev = netdev_findby_lipv4addr(mrec->imr_interface.s_addr); } if (dev == NULL) { nwarn("WARNING: Could not find device\n"); ret = -ENODEV; } else if (option == IP_ADD_MEMBERSHIP) { ret = igmp_joingroup(dev, &mrec->imr_multiaddr); } else { ret = igmp_leavegroup(dev, &mrec->imr_multiaddr); } } } break; case IP_MULTICAST_TTL: /* Set/read the time-to-live value of * outgoing multicast packets */ { FAR struct udp_conn_s *conn; int ttl; if (psock->s_type != SOCK_DGRAM || value == NULL || value_len == 0) { ret = -EINVAL; break; } ttl = (value_len >= sizeof(int)) ? *(FAR int *)value : (int)*(FAR unsigned char *)value; if (ttl <= 0 || ttl > 255) { ret = -EINVAL; } else { conn = (FAR struct udp_conn_s *)psock->s_conn; conn->ttl = ttl; ret = OK; } } break; /* The following IPv4 socket options are defined, but not implemented */ case IP_MULTICAST_IF: /* Set local device for a multicast * socket */ case IP_MULTICAST_LOOP: /* Set/read boolean that determines * whether sent multicast packets * should be looped back to local * sockets. */ case IP_UNBLOCK_SOURCE: /* Unblock previously blocked multicast * source */ case IP_BLOCK_SOURCE: /* Stop receiving multicast data from * source */ case IP_ADD_SOURCE_MEMBERSHIP: /* Join a multicast group; allow receive * only from source */ case IP_DROP_SOURCE_MEMBERSHIP: /* Leave a source-specific group. Stop * receiving data from a given multicast * group that come from a given source */ case IP_MULTICAST_ALL: /* Modify the delivery policy of * multicast messages bound to * INADDR_ANY */ #warning Missing logic nwarn("WARNING: Unimplemented IPv4 option: %d\n", option); ret = -ENOSYS; break; default: nerr("ERROR: Unrecognized IPv4 option: %d\n", option); ret = -ENOPROTOOPT; break; } net_unlock(); return ret; #else return -ENOPROTOOPT; #endif } #endif /* CONFIG_NET_IPv4 */