BOOL netconn_resolve( WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr_in *sa )
{
char *hostname;
#ifdef HAVE_GETADDRINFO
struct addrinfo *res, hints;
int ret;
#else
struct hostent *he;
#endif
if (!(hostname = strdupWA( hostnameW ))) return FALSE;
#ifdef HAVE_GETADDRINFO
memset( &hints, 0, sizeof(struct addrinfo) );
hints.ai_family = AF_INET;
ret = getaddrinfo( hostname, NULL, &hints, &res );
heap_free( hostname );
if (ret != 0)
{
TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
return FALSE;
}
memset( sa, 0, sizeof(struct sockaddr_in) );
memcpy( &sa->sin_addr, &((struct sockaddr_in *)res->ai_addr)->sin_addr, sizeof(struct in_addr) );
sa->sin_family = res->ai_family;
sa->sin_port = htons( port );
freeaddrinfo( res );
#else
EnterCriticalSection( &cs_gethostbyname );
he = gethostbyname( hostname );
heap_free( hostname );
if (!he)
{
TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
LeaveCriticalSection( &cs_gethostbyname );
return FALSE;
}
memset( sa, 0, sizeof(struct sockaddr_in) );
memcpy( (char *)&sa->sin_addr, he->h_addr, he->h_length );
sa->sin_family = he->h_addrtype;
sa->sin_port = htons( port );
LeaveCriticalSection( &cs_gethostbyname );
#endif
return TRUE;
}
static DWORD resolve_hostname( WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr *sa, socklen_t *sa_len )
{
char *hostname;
#ifdef HAVE_GETADDRINFO
struct addrinfo *res, hints;
int ret;
#else
struct hostent *he;
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
#endif
if (!(hostname = strdupWA( hostnameW ))) return ERROR_OUTOFMEMORY;
#ifdef HAVE_GETADDRINFO
memset( &hints, 0, sizeof(struct addrinfo) );
/* Prefer IPv4 to IPv6 addresses, since some web servers do not listen on
* their IPv6 addresses even though they have IPv6 addresses in the DNS.
*/
hints.ai_family = AF_INET;
ret = getaddrinfo( hostname, NULL, &hints, &res );
if (ret != 0)
{
TRACE("failed to get IPv4 address of %s (%s), retrying with IPv6\n", debugstr_w(hostnameW), gai_strerror(ret));
hints.ai_family = AF_INET6;
ret = getaddrinfo( hostname, NULL, &hints, &res );
if (ret != 0)
{
TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
heap_free( hostname );
return ERROR_WINHTTP_NAME_NOT_RESOLVED;
}
}
heap_free( hostname );
if (*sa_len < res->ai_addrlen)
{
WARN("address too small\n");
freeaddrinfo( res );
return ERROR_WINHTTP_NAME_NOT_RESOLVED;
}
*sa_len = res->ai_addrlen;
memcpy( sa, res->ai_addr, res->ai_addrlen );
/* Copy port */
switch (res->ai_family)
{
case AF_INET:
((struct sockaddr_in *)sa)->sin_port = htons( port );
break;
case AF_INET6:
((struct sockaddr_in6 *)sa)->sin6_port = htons( port );
break;
}
freeaddrinfo( res );
return ERROR_SUCCESS;
#else
EnterCriticalSection( &cs_gethostbyname );
he = gethostbyname( hostname );
heap_free( hostname );
if (!he)
{
TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
LeaveCriticalSection( &cs_gethostbyname );
return ERROR_WINHTTP_NAME_NOT_RESOLVED;
}
if (*sa_len < sizeof(struct sockaddr_in))
{
WARN("address too small\n");
LeaveCriticalSection( &cs_gethostbyname );
return ERROR_WINHTTP_NAME_NOT_RESOLVED;
}
*sa_len = sizeof(struct sockaddr_in);
memset( sa, 0, sizeof(struct sockaddr_in) );
memcpy( &sin->sin_addr, he->h_addr, he->h_length );
sin->sin_family = he->h_addrtype;
sin->sin_port = htons( port );
LeaveCriticalSection( &cs_gethostbyname );
return ERROR_SUCCESS;
#endif
}
