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81 lines
2.2 KiB
81 lines
2.2 KiB
#include <ccan/mem/mem.h>
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#include <gossipd/broadcast.h>
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struct broadcast_state *new_broadcast_state(tal_t *ctx)
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{
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struct broadcast_state *bstate = tal(ctx, struct broadcast_state);
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uintmap_init(&bstate->broadcasts);
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/* Skip 0 because we initialize peers with 0 */
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bstate->next_index = 1;
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return bstate;
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}
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static struct queued_message *new_queued_message(tal_t *ctx,
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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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{
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struct queued_message *msg = tal(ctx, struct queued_message);
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msg->type = type;
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msg->tag = tal_dup_arr(msg, u8, tag, tal_len(tag), 0);
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msg->payload = tal_dup_arr(msg, u8, payload, tal_len(payload), 0);
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return msg;
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}
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bool replace_broadcast(struct broadcast_state *bstate, u64 *index,
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const int type, const u8 *tag, const u8 *payload)
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{
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struct queued_message *msg;
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bool evicted = false;
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msg = uintmap_get(&bstate->broadcasts, *index);
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if (msg && msg->type == type &&
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memeq(msg->tag, tal_len(msg->tag), tag, tal_len(tag))) {
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uintmap_del(&bstate->broadcasts, *index);
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tal_free(msg);
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evicted = true;
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}
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*index = bstate->next_index;
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/* Now add the message to the queue */
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msg = new_queued_message(bstate, type, tag, payload);
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uintmap_add(&bstate->broadcasts, *index, msg);
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bstate->next_index++;
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return evicted;
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}
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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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{
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struct queued_message *msg;
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u64 index;
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bool evicted = false;
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memcheck(tag, tal_len(tag));
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/* Remove any tag&type collisions */
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for (msg = uintmap_first(&bstate->broadcasts, &index);
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msg;
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msg = uintmap_after(&bstate->broadcasts, &index)) {
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if (msg->type == type &&
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memeq(msg->tag, tal_len(msg->tag), tag, tal_len(tag))) {
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uintmap_del(&bstate->broadcasts, index);
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tal_free(msg);
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evicted = true;
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break;
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}
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}
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/* Now add the message to the queue */
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msg = new_queued_message(bstate, type, tag, payload);
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uintmap_add(&bstate->broadcasts, bstate->next_index, msg);
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bstate->next_index += 1;
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return evicted;
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}
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struct queued_message *next_broadcast_message(struct broadcast_state *bstate, u64 last_index)
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{
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return uintmap_after(&bstate->broadcasts, &last_index);
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}
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