src/mrib.h

   1 /*
   2  * Author: Steven Barth <steven at midlink.org>
   3  *
   4  * Copyright 2015 Deutsche Telekom AG
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *  http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  */
  19
  20 #pragma once
  21
  22 #include <netinet/in.h>
  23 #include <libubox/list.h>
  24 #include <sys/socket.h>
  25
  26 #include <netinet/icmp6.h>
  27
  28 #define icmp6_filter icmpv6_filter
  29 #include <linux/igmp.h>
  30 #include <linux/icmpv6.h>
  31 #undef icmp6_filter
  32
  33 #define MRIB_DEFAULT_LIFETIME 125
  34
  35 #define IPV6_ALL_NODES_INIT             { { { 0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x1 } } }
  36 #define INADDR_ALLIGMPV3RTRS_GROUP      cpu_to_be32(0xe0000016U)
  37
  38 typedef uint32_t mrib_filter;
  39 struct mrib_iface;
  40 struct mrib_user;
  41 struct mrib_querier;
  42
  43 typedef void(mrib_cb)(struct mrib_user *user, const struct in6_addr *group,
  44                 const struct in6_addr *source, mrib_filter *filter);
  45
  46 typedef void(mrib_igmp_cb)(struct mrib_querier *mrib, const struct igmphdr *igmp, size_t len,
  47                 const struct sockaddr_in *from);
  48
  49 typedef void(mrib_mld_cb)(struct mrib_querier *mrib, const struct mld_hdr *mld, size_t len,
  50                 const struct sockaddr_in6 *from);
  51
  52 struct mrib_user {
  53         struct list_head head;
  54         struct mrib_iface *iface;
  55         mrib_cb *cb_newsource;
  56 };
  57
  58 struct mrib_querier {
  59         struct list_head head;
  60         struct mrib_iface *iface;
  61         mrib_igmp_cb *cb_igmp;
  62         mrib_mld_cb *cb_mld;
  63 };
  64
  65 // Register a new user to mrib
  66 int mrib_attach_user(struct mrib_user *user, int ifindex, mrib_cb *cb_newsource);
  67
  68 // Deregister a user from mrib
  69 void mrib_detach_user(struct mrib_user *user);
  70
  71 // Register a querier to mrib
  72 int mrib_attach_querier(struct mrib_querier *querier, int ifindex, mrib_igmp_cb *cb_igmp, mrib_mld_cb *cb_mld);
  73
  74 // Deregister a querier from mrib
  75 void mrib_detach_querier(struct mrib_querier *querier);
  76
  77 // Flush state for a multicast route
  78 int mrib_flush(struct mrib_user *user, const struct in6_addr *group, uint8_t group_plen, const struct in6_addr *source);
  79
  80 // Add interface to filter
  81 int mrib_filter_add(mrib_filter *filter, struct mrib_user *user);
  82
  83 // Send IGMP-packet
  84 int mrib_send_igmp(struct mrib_querier *querier, struct igmpv3_query *igmp, size_t len,
  85                 const struct sockaddr_in *dest);
  86
  87 // Send MLD-packet
  88 int mrib_send_mld(struct mrib_querier *querier, struct mld_hdr *mld, size_t len,
  89                 const struct sockaddr_in6 *dest);
  90
  91 // Get source address
  92 int mrib_mld_source(struct mrib_querier *q, struct in6_addr *source);
  93 int mrib_igmp_source(struct mrib_querier *q, struct in_addr *source);