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#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/time.h>
#define TEST2(c, l, ...) ((c) ? 1 : \
(err++,printf(__FILE__":"#l": "#c" failed: " __VA_ARGS__),putchar('\n'),0))
#define TEST1(c, l, ...) TEST2(c, l, __VA_ARGS__)
#define TEST(c, ...) TEST1(c, __LINE__, __VA_ARGS__)
#define TESTE(c) TEST(c, "errno = %s", strerror(errno))
int test_socket(void)
{
int err = 0;
struct sockaddr_in sa = { .sin_family = AF_INET };
int s, c;
char buf[100];
TESTE((s=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP))>=0);
TESTE(bind(s, (void *)&sa, sizeof sa)==0);
TESTE(getsockname(s, (void *)&sa, (socklen_t[]){sizeof sa})==0);
TESTE(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO,
&(struct timeval){.tv_usec=1}, sizeof(struct timeval))==0);
TESTE((c=socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP))>=0);
sa.sin_addr.s_addr = htonl(0x7f000001);
TESTE(sendto(c, "x", 1, 0, (void *)&sa, sizeof sa)==1);
TESTE(recvfrom(s, buf, sizeof buf, 0, (void *)&sa, (socklen_t[]){sizeof sa})==1);
TEST(buf[0]=='x', "'%c'", buf[0]);
close(c);
close(s);
return err;
}
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