int
isc_win32os_versioncheck(unsigned int major, unsigned int minor,
unsigned int spmajor, unsigned int spminor) {
initialize_action();
if (major < isc_win32os_majorversion())
return (1);
if (major > isc_win32os_majorversion())
return (-1);
if (minor < isc_win32os_minorversion())
return (1);
if (minor > isc_win32os_minorversion())
return (-1);
if (spmajor < isc_win32os_servicepackmajor())
return (1);
if (spmajor > isc_win32os_servicepackmajor())
return (-1);
if (spminor < isc_win32os_servicepackminor())
return (1);
if (spminor > isc_win32os_servicepackminor())
return (-1);
/* Exact */
return (0);
}
isc_result_t
isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp) {
char strbuf[ISC_STRERRORSIZE];
isc_interfaceiter_t *iter;
isc_result_t result;
unsigned int major;
unsigned int minor;
unsigned int spmajor;
ULONG err;
int tries;
int error;
unsigned long bytesReturned = 0;
REQUIRE(mctx != NULL);
REQUIRE(iterp != NULL);
REQUIRE(*iterp == NULL);
iter = isc_mem_get(mctx, sizeof(*iter));
if (iter == NULL)
return (ISC_R_NOMEMORY);
InitSockets();
iter->mctx = mctx;
iter->ipaa = NULL;
iter->buf4 = NULL;
iter->buf6 = NULL;
iter->pos4 = NULL;
iter->ipaaCur = NULL;
iter->ipuaCur = NULL;
iter->ipaasize = 0;
iter->pos6 = 0;
iter->buf6size = 0;
iter->buf4size = 0;
iter->result = ISC_R_FAILURE;
iter->numIF = 0;
iter->v4IF = 0;
/*
* Use GetAdaptersAddresses in preference to ioctls when running
* on Windows XP SP1 or later. Earlier GetAdaptersAddresses do
* not appear to provide enough information to associate unicast
* addresses with their prefixes.
*/
if (!use_GAA_determined) {
major = isc_win32os_majorversion();
minor = isc_win32os_minorversion();
spmajor = isc_win32os_servicepackmajor();
if (major > 5 || (5 == major &&
(minor > 1 || (1 == minor && spmajor >= 1)))) {
if (NULL == hmod_iphlpapi)
hmod_iphlpapi = LoadLibrary("iphlpapi");
if (NULL != hmod_iphlpapi)
pGAA = (PGETADAPTERSADDRESSES)
GetProcAddress(
hmod_iphlpapi,
"GetAdaptersAddresses");
if (NULL != pGAA)
use_GAA = ISC_TRUE;
}
use_GAA_determined = ISC_TRUE;
}
if (!use_GAA)
goto use_ioctls;
iter->ipaasize = 16 * 1024;
for (tries = 0; tries < 5; tries++) {
iter->ipaa = isc_mem_reallocate(mctx, iter->ipaa,
iter->ipaasize);
if (NULL == iter->ipaa) {
result = ISC_R_NOMEMORY;
goto put_iter;
}
err = (*pGAA)(
AF_UNSPEC,
GAA_FLAG_INCLUDE_PREFIX | GAA_FLAG_SKIP_ANYCAST,
NULL,
iter->ipaa,
&iter->ipaasize);
if (NO_ERROR == err || ERROR_BUFFER_OVERFLOW != err)
break;
}
if (NO_ERROR != err) {
isc__strerror(err, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"GetAdaptersAddresses: %s",
strbuf);
result = ISC_R_UNEXPECTED;
goto gaa_failure;
}
iter->ipaaCur = iter->ipaa;
goto success;
use_ioctls:
/*
* Create an unbound datagram socket to do the
* SIO_GET_INTERFACE_LIST WSAIoctl on.
*/
if ((iter->socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
error = WSAGetLastError();
if (error == WSAEAFNOSUPPORT)
goto inet6_only;
isc__strerror(error, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"making interface scan socket: %s",
strbuf);
result = ISC_R_UNEXPECTED;
goto put_iter;
}
/*
* Get the interface configuration, allocating more memory if
* necessary.
*/
iter->buf4size = IFCONF_SIZE_INITIAL*sizeof(INTERFACE_INFO);
for (;;) {
iter->buf4 = isc_mem_get(mctx, iter->buf4size);
if (iter->buf4 == NULL) {
result = ISC_R_NOMEMORY;
goto alloc_failure;
}
if (WSAIoctl(iter->socket, SIO_GET_INTERFACE_LIST,
0, 0, iter->buf4, iter->buf4size,
&bytesReturned, 0, 0) == SOCKET_ERROR)
{
error = WSAGetLastError();
if (error != WSAEFAULT && error != WSAENOBUFS) {
errno = error;
isc__strerror(error, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: %s",
strbuf);
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
/*
* EINVAL. Retry with a bigger buffer.
*/
} else {
/*
* The WSAIoctl succeeded.
* If the number of the returned bytes is the same
* as the buffer size, we will grow it just in
* case and retry.
*/
if (bytesReturned > 0 &&
(bytesReturned < iter->buf4size))
break;
}
if (iter->buf4size >= IFCONF_SIZE_MAX*sizeof(INTERFACE_INFO)) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: "
"maximum buffer size exceeded");
result = ISC_R_UNEXPECTED;
goto ioctl_failure;
}
isc_mem_put(mctx, iter->buf4, iter->buf4size);
iter->buf4size += IFCONF_SIZE_INCREMENT *
sizeof(INTERFACE_INFO);
}
/*
* A newly created iterator has an undefined position
* until isc_interfaceiter_first() is called.
*/
iter->v4IF = bytesReturned/sizeof(INTERFACE_INFO);
/* We don't need the socket any more, so close it */
closesocket(iter->socket);
inet6_only:
/*
* Create an unbound datagram socket to do the
* SIO_ADDRESS_LIST_QUERY WSAIoctl on.
*/
if ((iter->socket = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
error = WSAGetLastError();
if (error == WSAEAFNOSUPPORT)
goto success;
isc__strerror(error, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"making interface scan socket: %s",
strbuf);
result = ISC_R_UNEXPECTED;
goto put_iter;
}
/*
* Get the interface configuration, allocating more memory if
* necessary.
*/
iter->buf6size = sizeof(SOCKET_ADDRESS_LIST) +
IFCONF_SIZE_INITIAL*sizeof(SOCKET_ADDRESS);
for (;;) {
iter->buf6 = isc_mem_get(mctx, iter->buf6size);
if (iter->buf6 == NULL) {
result = ISC_R_NOMEMORY;
goto ioctl_failure;
}
if (WSAIoctl(iter->socket, SIO_ADDRESS_LIST_QUERY,
0, 0, iter->buf6, iter->buf6size,
&bytesReturned, 0, 0) == SOCKET_ERROR)
{
error = WSAGetLastError();
if (error != WSAEFAULT && error != WSAENOBUFS) {
errno = error;
isc__strerror(error, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__,
"sio address list query: %s",
strbuf);
result = ISC_R_UNEXPECTED;
goto ioctl6_failure;
}
/*
* EINVAL. Retry with a bigger buffer.
*/
} else
break;
if (iter->buf6size >= IFCONF_SIZE_MAX*sizeof(SOCKET_ADDRESS)) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"get interface configuration: "
"maximum buffer size exceeded");
result = ISC_R_UNEXPECTED;
goto ioctl6_failure;
}
isc_mem_put(mctx, iter->buf6, iter->buf6size);
iter->buf6size += IFCONF_SIZE_INCREMENT *
sizeof(SOCKET_ADDRESS);
}
/*
* initialize loop__1 to [::1] and loopfe80__1 to [fe80::1].
* used by internal_current6().
*/
memset(&iter->loop__1, 0, sizeof(iter->loop__1));
memset(&iter->loopfe80__1, 0, sizeof(iter->loopfe80__1));
iter->loop__1.s6_addr[15] = 1;
iter->loopfe80__1.s6_addr[15] = 1;
iter->loopfe80__1.s6_addr[0] = 0xfe;
iter->loopfe80__1.s6_addr[1] = 0x80;
closesocket(iter->socket);
success:
iter->magic = IFITER_MAGIC;
*iterp = iter;
return (ISC_R_SUCCESS);
gaa_failure:
isc_mem_put(mctx, iter->ipaa, iter->ipaasize);
goto put_iter;
ioctl6_failure:
isc_mem_put(mctx, iter->buf6, iter->buf6size);
ioctl_failure:
if (iter->buf4 != NULL)
isc_mem_put(mctx, iter->buf4, iter->buf4size);
alloc_failure:
if (iter->socket >= 0)
(void) closesocket(iter->socket);
put_iter:
isc_mem_put(mctx, iter, sizeof(*iter));
return (result);
}