a966dd71ad
gossip_store.c uses this to avoid two reads, and we want to use it elsewhere too. Also fix old comment on gossip_store_readhdr(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
#include "config.h"
|
|
#include <common/gossip_store.h>
|
|
#include <common/gossip_store_wiregen.h>
|
|
#include <unistd.h>
|
|
|
|
bool gossip_store_readhdr(int gossip_store_fd, size_t off,
|
|
size_t *len,
|
|
u32 *timestamp,
|
|
u16 *flags,
|
|
u16 *type)
|
|
{
|
|
struct gossip_hdr_and_type buf;
|
|
int r;
|
|
|
|
r = pread(gossip_store_fd, &buf, GOSSIP_HDR_AND_TYPE_SIZE, off);
|
|
if (r != GOSSIP_HDR_AND_TYPE_SIZE)
|
|
return false;
|
|
if (!(buf.hdr.flags & CPU_TO_BE16(GOSSIP_STORE_COMPLETED_BIT)))
|
|
return false;
|
|
*len = be16_to_cpu(buf.hdr.len);
|
|
if (flags)
|
|
*flags = be16_to_cpu(buf.hdr.flags);
|
|
if (timestamp)
|
|
*timestamp = be32_to_cpu(buf.hdr.timestamp);
|
|
if (type)
|
|
*type = be16_to_cpu(buf.type);
|
|
return true;
|
|
}
|
|
|
|
size_t find_gossip_store_end(int gossip_store_fd, size_t off)
|
|
{
|
|
size_t msglen;
|
|
u16 type;
|
|
|
|
while (gossip_store_readhdr(gossip_store_fd, off,
|
|
&msglen, NULL, NULL, &type)) {
|
|
/* Don't swallow end marker! */
|
|
if (type == WIRE_GOSSIP_STORE_ENDED)
|
|
break;
|
|
|
|
off += sizeof(struct gossip_hdr) + msglen;
|
|
}
|
|
return off;
|
|
}
|