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29b83aed2a
We don't anticipate daemons across machines, but you never know. Suggested-by: Christian Decker Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
38 lines
801 B
C
38 lines
801 B
C
#include <assert.h>
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#include <ccan/endian/endian.h>
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#include <ccan/read_write_all/read_write_all.h>
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#include <errno.h>
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#include <wire/wire_io.h>
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#include <wire/wire_sync.h>
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bool wire_sync_write(int fd, const void *msg TAKES)
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{
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wire_len_t hdr = cpu_to_wirelen(tal_len(msg));
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bool ret;
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assert(tal_len(msg) < WIRE_LEN_LIMIT);
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ret = write_all(fd, &hdr, sizeof(hdr))
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&& write_all(fd, msg, tal_count(msg));
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if (taken(msg))
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tal_free(msg);
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return ret;
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}
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u8 *wire_sync_read(const tal_t *ctx, int fd)
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{
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wire_len_t len;
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u8 *msg;
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if (!read_all(fd, &len, sizeof(len)))
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return NULL;
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if (wirelen_to_cpu(len) >= WIRE_LEN_LIMIT) {
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errno = E2BIG;
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return NULL;
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}
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msg = tal_arr(ctx, u8, wirelen_to_cpu(len));
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if (!read_all(fd, msg, wirelen_to_cpu(len)))
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return tal_free(msg);
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return msg;
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}
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