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153b7bf192
connectd is the only one who uses these routines now. The rest can be linked into a plugin. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#include "config.h"
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#include <ccan/crc32c/crc32c.h>
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#include <common/gossip_store.h>
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#include <common/per_peer_state.h>
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#include <common/status.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <gossipd/gossip_store_wiregen.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <wire/peer_wire.h>
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/* We cheat and read first two bytes of message too. */
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struct hdr_and_type {
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struct gossip_hdr hdr;
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be16 type;
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};
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/* Beware padding! */
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#define HDR_AND_TYPE_SIZE (sizeof(struct gossip_hdr) + sizeof(u16))
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bool gossip_store_readhdr(int gossip_store_fd, size_t off,
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size_t *len,
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u32 *timestamp,
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u16 *flags,
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u16 *type)
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{
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struct hdr_and_type buf;
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int r;
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r = pread(gossip_store_fd, &buf, HDR_AND_TYPE_SIZE, off);
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if (r != HDR_AND_TYPE_SIZE)
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return false;
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*len = be16_to_cpu(buf.hdr.len);
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if (flags)
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*flags = be16_to_cpu(buf.hdr.flags);
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if (timestamp)
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*timestamp = be32_to_cpu(buf.hdr.timestamp);
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if (type)
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*type = be16_to_cpu(buf.type);
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return true;
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}
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size_t find_gossip_store_end(int gossip_store_fd, size_t off)
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{
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size_t msglen;
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u16 type;
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while (gossip_store_readhdr(gossip_store_fd, off,
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&msglen, NULL, NULL, &type)) {
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/* Don't swallow end marker! */
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if (type == WIRE_GOSSIP_STORE_ENDED)
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break;
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off += sizeof(struct gossip_hdr) + msglen;
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}
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return off;
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}
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