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/*
* Author: Steven Barth <steven at midlink.org>
*
* Copyright 2015 Deutsche Telekom AG
*
* Licensed 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.
*
*/
#pragma once
#include <libubox/list.h>
#include <libubox/uloop.h>
#include <libubox/avl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <string.h>
#include <stdbool.h>
#include "mrib.h"
#include "groups.h"
struct querier_iface {
struct list_head head;
struct list_head users;
struct uloop_timeout timeout;
struct groups_config cfg;
struct uloop_fd igmp_fd;
omgp_time_t igmp_next_query;
bool igmp_other_querier;
int igmp_startup_tries;
struct uloop_fd mld_fd;
omgp_time_t mld_next_query;
bool mld_other_querier;
int mld_startup_tries;
struct mrib_querier mrib;
struct groups groups;
int ifindex;
};
struct querier;
struct querier_user;
struct querier_user_iface;
typedef void (querier_iface_cb)(struct querier_user_iface *user, const struct in6_addr *group,
bool include, const struct in6_addr *sources, size_t len);
struct querier_user {
struct list_head head;
struct groups *groups;
struct querier *querier;
};
struct querier_user_iface {
struct list_head head;
struct querier_user user;
struct querier_iface *iface;
querier_iface_cb *user_cb;
};
/* External API */
int querier_init(struct querier *querier);
void querier_deinit(struct querier *querier);
int querier_attach(struct querier_user_iface *user, struct querier *querier,
int ifindex, querier_iface_cb *cb);
void querier_detach(struct querier_user_iface *user);
/* Internal API */
struct querier {
struct list_head ifaces;
};
#define QUERIER_MAX_SOURCE 75
#define QUERIER_MAX_GROUPS 256
#define QUERIER_SUPPRESS (1 << 3)
static inline in_addr_t querier_unmap(const struct in6_addr *addr6)
{
return addr6->s6_addr32[3];
}
static inline void querier_map(struct in6_addr *addr6, in_addr_t addr4)
{
addr6->s6_addr32[0] = 0;
addr6->s6_addr32[1] = 0;
addr6->s6_addr32[2] = cpu_to_be32(0xffff);
addr6->s6_addr32[3] = addr4;
}
void querier_announce(struct querier_user *user, omgp_time_t now, const struct group *group, bool enabled);
void querier_synthesize_events(struct querier *querier);
int querier_qqi(uint8_t qqic);
int querier_mrd(uint16_t mrc);
uint8_t querier_qqic(int qi);
uint16_t querier_mrc(int mrd);
void igmp_handle(struct mrib_querier *mrib, const struct igmphdr *igmp, size_t len,
const struct sockaddr_in *from);
int igmp_send_query(struct querier_iface *q,
const struct in6_addr *group,
const struct list_head *sources,
bool suppress);
void mld_handle(struct mrib_querier *mrib, const struct mld_hdr *hdr, size_t len,
const struct sockaddr_in6 *from);
ssize_t mld_send_query(struct querier_iface *q,
const struct in6_addr *group,
const struct list_head *sources,
bool suppress);
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