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| | #include "lookup.h"
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
void __lookup_addrconfig( struct addrconfig *cfg ) {
int r;
int fd;
struct sockaddr_in sai = {
.sin_family = AF_INET,
.sin_port = htons( 42 ),
.sin_addr.s_addr = INADDR_LOOPBACK,
};
cfg->af_inet = false;
r = socket( AF_INET, SOCK_DGRAM, 0 );
if ( -1 != r ) {
fd = r;
r = connect( fd, (struct sockaddr *) & sai, sizeof( sai ) );
cfg->af_inet = 0 == r;
close( fd );
}
struct sockaddr_in6 sai6 = {
.sin6_family = AF_INET6,
.sin6_port = htons( 42 ),
.sin6_addr = IN6ADDR_LOOPBACK_INIT,
};
cfg->af_inet6 = false;
r = socket( AF_INET6, SOCK_DGRAM, 0 );
if ( -1 != r ) {
fd = r;
r = connect( fd, (struct sockaddr *) & sai6, sizeof( sai6 ) );
cfg->af_inet6 = 0 == r;
close( fd );
}
}
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