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111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
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* BIRD -- IGMP protocol
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*
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* (c) 2016 Ondrej Hlavaty <aearsis@eideo.cz>
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* (c) 2018 Ondrej Zajicek <santiago@crfreenet.org>
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* (c) 2018 CZ.NIC z.s.p.o.
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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#ifndef _BIRD_IGMP_H_
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#define _BIRD_IGMP_H_
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#include "nest/bird.h"
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#include "nest/iface.h"
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#include "nest/locks.h"
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#include "nest/protocol.h"
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#include "nest/route.h"
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#include "conf/conf.h"
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#include "lib/lists.h"
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#include "lib/hash.h"
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#include "lib/socket.h"
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#include "lib/timer.h"
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#define IGMP_PROTO 2
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#define IGMP_DEFAULT_ROBUSTNESS 2
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#define IGMP_DEFAULT_QUERY_INT (125 S_)
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#define IGMP_DEFAULT_RESPONSE_INT (10 S_)
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#define IGMP_DEFAULT_LAST_MEMBER_INT (1 S_)
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struct igmp_config
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{
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struct proto_config c;
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list iface_list; /* List of ifaces (struct igmp_iface_config) */
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};
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struct igmp_iface_config
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{
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struct iface_patt i;
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/* These are configurable */
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uint robustness, startup_query_cnt, last_member_query_cnt;
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btime query_int, query_response_int, startup_query_int, last_member_query_int;
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/* These are not */
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btime group_member_int, other_querier_int;
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};
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struct igmp_proto
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{
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struct proto p;
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list iface_list; /* List of interfaces (struct igmp_iface) */
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struct mif_group *mif_group; /* Associated MIF group for multicast routes */
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struct tbf log_pkt_tbf; /* TBF for packet messages */
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};
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struct igmp_iface
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{
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node n; /* Member of igmp_proto->iface_list */
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struct igmp_proto *proto;
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struct iface *iface; /* Underyling core interface */
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struct mif *mif; /* Associated multicast iface */
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struct igmp_iface_config *cf; /* Related config, must be updated in reconfigure */
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struct object_lock *lock; /* Interface lock */
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sock *sk; /* IGMP socket */
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HASH(struct igmp_group) groups;
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uint query_state; /* initial / querier / non-querier */
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int startup_query_cnt; /* Remaining startup queries to send */
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timer *query_timer, *other_present;
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};
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struct igmp_group
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{
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struct igmp_group *next; /* Member of igmp_iface->groups */
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struct igmp_iface *ifa;
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ip4_addr address;
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uint join_state;
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timer *join_timer, *v1_host_timer, *rxmt_timer;
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};
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#define IGMP_JS_NO_MEMBERS 0
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#define IGMP_JS_MEMBERS 1
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#define IGMP_JS_V1_MEMBERS 2
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#define IGMP_JS_CHECKING 3
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#define IGMP_QS_INIT 0
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#define IGMP_QS_QUERIER 1
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#define IGMP_QS_NONQUERIER 2
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/* igmp.c */
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void igmp_handle_query(struct igmp_iface *ifa, ip4_addr addr, ip4_addr from, btime resp_time);
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void igmp_handle_report(struct igmp_iface *ifa, ip4_addr addr, int version);
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void igmp_handle_leave(struct igmp_iface *ifa, ip4_addr addr);
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void igmp_finish_iface_config(struct igmp_iface_config *cf);
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/* packets.c */
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int igmp_open_socket(struct igmp_iface *ifa);
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void igmp_send_query(struct igmp_iface *ifa, ip4_addr addr, btime resp_time);
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#endif
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