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