#include <config.h>
#include <errno.h>
#include <unistd.h>
#include <isc/net.h>
#include <isc/strerror.h>
#include <isc/string.h>
#include <isc/util.h>
#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRANY)
const struct in6_addr isc_net_in6addrany = IN6ADDR_ANY_INIT;
#endif
static isc_boolean_t once = ISC_FALSE;
static isc_result_t ipv4_result = ISC_R_NOTFOUND;
static isc_result_t ipv6_result = ISC_R_NOTFOUND;
static isc_result_t
try_proto(int domain) {
SOCKET s;
isc_result_t result = ISC_R_SUCCESS;
char strbuf[ISC_STRERRORSIZE];
int errval;
s = socket(domain, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) {
errval = WSAGetLastError();
switch (errval) {
case WSAEAFNOSUPPORT:
case WSAEPROTONOSUPPORT:
case WSAEINVAL:
return (ISC_R_NOTFOUND);
default:
isc__strerror(errval, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"socket() %s failed",
strbuf);
return (ISC_R_UNEXPECTED);
}
}
#ifdef ISC_PLATFORM_HAVEIPV6
#ifdef ISC_PLATFORM_HAVEIN6PKTINFO
if (domain == PF_INET6) {
struct sockaddr_in6 sin6;
unsigned int len;
len = sizeof(sin6);
if (getsockname(s, (struct sockaddr *)&sin6, (void *)&len) < 0)
{
result = ISC_R_NOTFOUND;
} else {
if (len == sizeof(struct sockaddr_in6))
result = ISC_R_SUCCESS;
else {
result = ISC_R_NOTFOUND;
}
}
}
#endif
#endif
closesocket(s);
return (result);
}
static void
initialize_action(void) {
ipv4_result = try_proto(PF_INET);
#ifdef ISC_PLATFORM_HAVEIPV6
#ifdef ISC_PLATFORM_HAVEIN6PKTINFO
ipv6_result = try_proto(PF_INET6);
#endif
#endif
}
static void
initialize(void) {
if(once == ISC_FALSE) {
initialize_action();
once = ISC_TRUE;
}
}
isc_result_t
isc_net_probeipv4(void) {
initialize();
return (ipv4_result);
}
isc_result_t
isc_net_probeipv6(void) {
initialize();
return (ipv6_result);
}
BOOL Win32InitSockets() {
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(2, 0);
err = WSAStartup(wVersionRequested, &wsaData);
if ( err != 0 ) {
return(FALSE);
}
return(TRUE);
}