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62a5183fb5
We'll use this to keep a two-hour-ago "recent gossip offset" as an optimization. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
#ifndef LIGHTNING_COMMON_GOSSIP_STORE_H
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#define LIGHTNING_COMMON_GOSSIP_STORE_H
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#include "config.h"
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#include <ccan/endian/endian.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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struct gossip_state;
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struct gossip_rcvd_filter;
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/**
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* gossip_store -- On-disk storage related information
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*/
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#define GOSSIP_STORE_VERSION 10
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/**
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* Bit of length we use to mark a deleted record.
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*/
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#define GOSSIP_STORE_LEN_DELETED_BIT 0x80000000U
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/**
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* Bit of length we use to mark an important record.
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*/
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#define GOSSIP_STORE_LEN_PUSH_BIT 0x40000000U
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/**
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* Bit of length used to define a rate-limited record (do not rebroadcast)
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*/
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#define GOSSIP_STORE_LEN_RATELIMIT_BIT 0x20000000U
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/* Mask for extracting just the length part of len field */
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#define GOSSIP_STORE_LEN_MASK \
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(~(GOSSIP_STORE_LEN_PUSH_BIT | GOSSIP_STORE_LEN_DELETED_BIT | \
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GOSSIP_STORE_LEN_RATELIMIT_BIT))
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/**
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* gossip_hdr -- On-disk format header.
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*/
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struct gossip_hdr {
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beint32_t len; /* Length of message after header. */
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beint32_t crc; /* crc of message of timestamp, after header. */
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beint32_t timestamp; /* timestamp of msg. */
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};
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/**
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* Direct store accessor: loads gossip msg from store.
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*
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* Returns NULL if there are no more gossip msgs.
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* Updates *end if the known end of file has moved.
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* Updates *gossip_store_fd if file has been compacted.
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*/
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u8 *gossip_store_next(const tal_t *ctx,
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int *gossip_store_fd,
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u32 timestamp_min, u32 timestamp_max,
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bool push_only,
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bool with_spam,
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size_t *off, size_t *end);
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/**
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* Gossipd will be writing to this, and it's not atomic! Safest
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* way to find the "end" is to walk through.
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* @old_end: 1 if no previous end.
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*/
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size_t find_gossip_store_end(int gossip_store_fd, size_t old_end);
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/**
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* Return offset of first entry >= this timestamp.
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*/
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size_t find_gossip_store_by_timestamp(int gossip_store_fd,
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size_t off,
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u32 timestamp);
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#endif /* LIGHTNING_COMMON_GOSSIP_STORE_H */
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