50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* Simple binding of nanopb streams to TCP sockets.
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*/
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <pb_encode.h>
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#include <pb_decode.h>
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#include "common.h"
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static bool write_callback(pb_ostream_t *stream, const uint8_t *buf, size_t count)
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{
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int fd = (intptr_t)stream->state;
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return send(fd, buf, count, 0) == count;
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}
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static bool read_callback(pb_istream_t *stream, uint8_t *buf, size_t count)
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{
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int fd = (intptr_t)stream->state;
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int result;
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if (buf == NULL)
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{
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/* Well, this is a really inefficient way to skip input. */
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/* It is only used when there are unknown fields. */
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char dummy;
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while (count-- && recv(fd, &dummy, 1, 0) == 1);
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return count == 0;
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}
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result = recv(fd, buf, count, MSG_WAITALL);
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if (result == 0)
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stream->bytes_left = 0; /* EOF */
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return result == count;
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}
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pb_ostream_t pb_ostream_from_socket(int fd)
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{
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pb_ostream_t stream = {&write_callback, (void*)(intptr_t)fd, SIZE_MAX, 0};
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return stream;
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}
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pb_istream_t pb_istream_from_socket(int fd)
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{
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pb_istream_t stream = {&read_callback, (void*)(intptr_t)fd, SIZE_MAX};
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return stream;
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}
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