/* See LICENSE file for copyright and license details. */
#ifndef FORTIFY_SYS_SOCKET_H_
#define FORTIFY_SYS_SOCKET_H_

#include_next <sys/socket.h>

#if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0

#define __errordecl(name, msg) extern void name(void) __attribute__((__error__(msg)))

__errordecl(__recv_error, "recv: buffer overflow detected");
static inline __attribute__ ((always_inline))
ssize_t
__fortify_recv(int sockfd, void *buf, size_t n, int flags)
{
	size_t bos = __builtin_object_size(buf, 0);

	if (__builtin_constant_p(n) && n > bos)
		__recv_error();

	if (n > bos)
		__builtin_trap();
	return recv(sockfd, buf, n, flags);
}

#undef recv
#define recv(sockfd, buf, n, flags) __fortify_recv(sockfd, buf, n, flags)

#endif

#endif