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#include "port/sys.h"
#define TEST_GETADDRINFO
#include "port/netdb.c" /* for getaddrinfo, NI_MAXHOST */
#include "port/stdlib.h" /* for exit, EXIT_SUCCESS, itoa */
#include <stdio.h> /* for fprintf */
#include <string.h> /* for memset */
int main( void ) {
struct addrinfo hints;
struct addrinfo *result;
struct addrinfo *res;
int error;
char port_or_service[10];
/* tell getaddrinfo what we want */
memset( &hints, 0, sizeof( struct addrinfo ) );
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
/* resolve the domain name into a list of addresses */
itoa( 80, port_or_service, 10 );
error = getaddrinfo( "localhost", port_or_service, &hints, &result );
if( error != 0 ) {
fprintf( stderr, "getaddrinfo failed: %s (%d)\n",
gai_strerror( error ), error );
return EXIT_FAILURE;
}
/* loop over all returned results and do inverse lookup */
for( res = result; res != NULL; res = res->ai_next ) {
char s[100];
const struct sockaddr_in *addr_ipv4;
const struct sockaddr_in6 *addr_ipv6;
memset( s, 0, 100 );
switch( res->ai_family ) {
case AF_INET:
addr_ipv4 = (const struct sockaddr_in *)res->ai_addr;
inet_ntop( res->ai_family, &addr_ipv4->sin_addr, s, 100 );
break;
case AF_INET6:
addr_ipv6 = (const struct sockaddr_in6 *)res->ai_addr;
inet_ntop( res->ai_family, &addr_ipv6->sin6_addr, s, 100 );
break;
}
printf( "%d %d %s\n", res->ai_family, res->ai_socktype, s );
}
freeaddrinfo( result );
return EXIT_SUCCESS;
}
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