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52 lines
1.6 KiB
52 lines
1.6 KiB
#ifndef LIGHTNING_LIGHTNINGD_GOSSIP_BROADCAST_H
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#define LIGHTNING_LIGHTNINGD_GOSSIP_BROADCAST_H
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#include "config.h"
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#include <ccan/intmap/intmap.h>
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#include <ccan/list/list.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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/* Common functionality to implement staggered broadcasts with replacement. */
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struct queued_message {
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int type;
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/* Unique tag specifying the msg origin */
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void *tag;
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/* Serialized payload */
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u8 *payload;
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};
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struct broadcast_state {
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u32 next_index;
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UINTMAP(struct queued_message *) broadcasts;
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};
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struct broadcast_state *new_broadcast_state(tal_t *ctx);
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/* Queue a new message to be broadcast and replace any outdated
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* broadcast. Replacement is done by comparing the `type` and the
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* `tag`, if both match the old message is dropped from the queue. The
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* new message is added to the top of the broadcast queue. Returns
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* true if a previous entry with the same tag has been evicted. */
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bool queue_broadcast(struct broadcast_state *bstate,
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const int type,
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const u8 *tag,
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const u8 *payload);
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/* Replace a queued message with @index, if it matches the type and
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* tag for the new message. The new message will be queued with the
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* next highest index. @index is updated to hold the index of the
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* newly queued message*/
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bool replace_broadcast(struct broadcast_state *bstate,
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u64 *index,
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const int type,
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const u8 *tag,
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const u8 *payload);
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struct queued_message *next_broadcast_message(struct broadcast_state *bstate, u64 last_index);
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#endif /* LIGHTNING_LIGHTNINGD_GOSSIP_BROADCAST_H */
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