1#include <sys/socket.h>
 2#include <sys/time.h>
 3#include <errno.h>
 4#include "syscall.h"
 5
 6#define IS32BIT(x) !((x)+0x80000000ULL>>32)
 7#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
 8
 9int setsockopt(int fd, int level, int optname, const void *optval, socklen_t optlen)
10{
11	const struct timeval *tv;
12	time_t s;
13	suseconds_t us;
14
15	int r = __socketcall(setsockopt, fd, level, optname, optval, optlen, 0);
16
17	if (r==-ENOPROTOOPT) switch (level) {
18	case SOL_SOCKET:
19		switch (optname) {
20		case SO_RCVTIMEO:
21		case SO_SNDTIMEO:
22			if (SO_RCVTIMEO == SO_RCVTIMEO_OLD) break;
23			if (optlen < sizeof *tv) return __syscall_ret(-EINVAL);
24			tv = optval;
25			s = tv->tv_sec;
26			us = tv->tv_usec;
27			if (!IS32BIT(s)) return __syscall_ret(-ENOTSUP);
28
29			if (optname==SO_RCVTIMEO) optname=SO_RCVTIMEO_OLD;
30			if (optname==SO_SNDTIMEO) optname=SO_SNDTIMEO_OLD;
31
32			r = __socketcall(setsockopt, fd, level, optname,
33				((long[]){s, CLAMP(us)}), 2*sizeof(long), 0);
34			break;
35		case SO_TIMESTAMP:
36		case SO_TIMESTAMPNS:
37			if (SO_TIMESTAMP == SO_TIMESTAMP_OLD) break;
38			if (optname==SO_TIMESTAMP) optname=SO_TIMESTAMP_OLD;
39			if (optname==SO_TIMESTAMPNS) optname=SO_TIMESTAMPNS_OLD;
40			r = __socketcall(setsockopt, fd, level,
41				optname, optval, optlen, 0);
42			break;
43		}
44	}
45	return __syscall_ret(r);
46}