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ipc: windows: use devpkey instead of nci for name

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-07-31 00:39:58 +02:00
parent fabe24df3a
commit 52597c3515
4 changed files with 41 additions and 120 deletions
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9
src/Makefile
View file

@ -62,16 +62,13 @@ ifeq ($(PLATFORM),windows)
CC := x86_64-w64-mingw32-clang
WINDRES := $(shell $(CC) $(CFLAGS) -print-prog-name=windres 2>/dev/null)
CFLAGS += -Iwincompat/include -include wincompat/compat.h -DWINVER=0x0601 -D_WIN32_WINNT=0x0601 -flto
LDLIBS += -lws2_32 -lsetupapi -lole32 -ladvapi32 -lnci -Lwincompat
LDLIBS += -lws2_32 -lsetupapi -lole32 -ladvapi32 -Lwincompat
LDFLAGS += -flto -Wl,--dynamicbase -Wl,--nxcompat -Wl,--tsaware -mconsole
LDFLAGS += -Wl,--major-os-version=6 -Wl,--minor-os-version=1 -Wl,--major-subsystem-version=6 -Wl,--minor-subsystem-version=1
# The use of -Wl,/delayload: here implies we're using llvm-mingw
LDFLAGS += -Wl,/delayload:ws2_32.dll -Wl,/delayload:setupapi.dll -Wl,/delayload:ole32.dll -Wl,/delayload:advapi32.dll -Wl,/delayload:nci.dll
LDFLAGS += -Wl,/delayload:ws2_32.dll -Wl,/delayload:setupapi.dll -Wl,/delayload:ole32.dll -Wl,/delayload:advapi32.dll
VERSION := $(patsubst "%",%,$(filter "%",$(file < version.h)))
wg: wincompat/libc.o wincompat/init.o wincompat/loader.o wincompat/resources.o wincompat/nci.lib
wincompat/nci.lib: wincompat/include/nci.h
-@$(if $(BUILT_IN_RM),$(BUILT_IN_RM),$(RM)) $@
$(LINK.o) -DGENERATE_LIB -shared -xc $< -o wincompat/nci.dll -Wl,--out-implib,$@
wg: wincompat/libc.o wincompat/init.o wincompat/loader.o wincompat/resources.o
wincompat/resources.o: wincompat/resources.rc wincompat/manifest.xml
$(WINDRES) -DVERSION_STR=$(VERSION) -O coff -c 65001 -i $< -o $@
endif

116
src/ipc-windows.h
View file

@ -11,7 +11,6 @@
#include <initguid.h>
#include <devguid.h>
#include <ddk/ndisguid.h>
#include <nci.h>
#include <wireguard.h>
#include <hashtable.h>
@ -19,6 +18,7 @@
static bool have_cached_kernel_interfaces;
static struct hashtable cached_kernel_interfaces;
static const DEVPROPKEY devpkey_name = DEVPKEY_WG_NAME;
static int kernel_get_wireguard_interfaces(struct string_list *list)
{
@ -32,11 +32,10 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
for (DWORD i = 0;; ++i) {
bool found = false;
DWORD buf_len = 0, value_type, ret;
DWORD buf_len = 0, value_type;
WCHAR *buf = NULL, adapter_name[MAX_ADAPTER_NAME];
SP_DEVINFO_DATA dev_info_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
HKEY key;
GUID instance_id;
DEVPROPTYPE prop_type;
ULONG status, problem_code;
char *interface_name;
struct hashtable_entry *entry;
@ -49,11 +48,12 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
while (!SetupDiGetDeviceRegistryPropertyW(dev_info, &dev_info_data, SPDRP_HARDWAREID, &value_type, (BYTE *)buf, buf_len, &buf_len)) {
free(buf);
buf = NULL;
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
goto skip;
break;
buf = malloc(buf_len);
if (!buf)
goto skip;
break;
}
if (!buf || value_type != REG_MULTI_SZ || buf_len < sizeof(*buf) * 2 || buf[buf_len / sizeof(*buf) - 1] || buf[buf_len / sizeof(*buf) - 2]) {
@ -70,45 +70,25 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
free(buf);
if (!found)
continue;
buf = NULL;
buf_len = 0;
key = SetupDiOpenDevRegKey(dev_info, &dev_info_data, DICS_FLAG_GLOBAL, 0, DIREG_DRV, KEY_QUERY_VALUE);
if (key == INVALID_HANDLE_VALUE)
if (!SetupDiGetDevicePropertyW(dev_info, &dev_info_data, &devpkey_name,
&prop_type, (PBYTE)adapter_name,
sizeof(adapter_name), NULL, 0) ||
prop_type != DEVPROP_TYPE_STRING)
continue;
buf_len = 39 * sizeof(*buf);
buf = malloc(buf_len);
if (!buf)
continue;
while ((ret = RegQueryValueExW(key, L"NetCfgInstanceId", NULL, &value_type, (BYTE *)buf, &buf_len)) != ERROR_SUCCESS) {
free(buf);
if (ret != ERROR_MORE_DATA)
goto cleanup_key;
buf = malloc(buf_len);
if (!buf)
goto cleanup_key;
}
if (!buf || value_type != REG_SZ || buf_len < sizeof(*buf) || buf[buf_len / sizeof(*buf) - 1])
goto cleanup_buf;
if (FAILED(CLSIDFromString(buf, &instance_id)))
goto cleanup_buf;
if (NciGetConnectionName(&instance_id, adapter_name, sizeof(adapter_name), NULL) != ERROR_SUCCESS)
goto cleanup_buf;
adapter_name[_countof(adapter_name) - 1] = L'0';
if (!adapter_name[0])
goto cleanup_buf;
continue;
buf_len = WideCharToMultiByte(CP_UTF8, 0, adapter_name, -1, NULL, 0, NULL, NULL);
if (!buf_len)
goto cleanup_buf;
continue;
interface_name = malloc(buf_len);
if (!interface_name)
goto cleanup_buf;
continue;
buf_len = WideCharToMultiByte(CP_UTF8, 0, adapter_name, -1, interface_name, buf_len, NULL, NULL);
if (!buf_len) {
free(interface_name);
goto cleanup_buf;
continue;
}
if (CM_Get_DevNode_Status(&status, &problem_code, dev_info_data.DevInst, 0) == CR_SUCCESS &&
@ -118,26 +98,20 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
entry = hashtable_find_or_insert_entry(&cached_kernel_interfaces, interface_name);
free(interface_name);
if (!entry)
goto cleanup_entry;
continue;
if (SetupDiGetDeviceInstanceIdW(dev_info, &dev_info_data, NULL, 0, &buf_len) || GetLastError() != ERROR_INSUFFICIENT_BUFFER)
goto cleanup_entry;
continue;
entry->value = calloc(sizeof(WCHAR), buf_len);
if (!entry->value)
goto cleanup_entry;
continue;
if (!SetupDiGetDeviceInstanceIdW(dev_info, &dev_info_data, entry->value, buf_len, &buf_len)) {
free(entry->value);
entry->value = NULL;
goto cleanup_entry;
continue;
}
cleanup_entry:
will_have_cached_kernel_interfaces |= entry != NULL && entry->value != NULL;
cleanup_buf:
free(buf);
cleanup_key:
RegCloseKey(key);
skip:;
will_have_cached_kernel_interfaces = true;
}
SetupDiDestroyDeviceInfoList(dev_info);
have_cached_kernel_interfaces = will_have_cached_kernel_interfaces;
@ -187,11 +161,10 @@ err_hash:
for (DWORD i = 0; !interfaces; ++i) {
bool found = false;
DWORD buf_len = 0, value_type, ret;
DWORD buf_len = 0, value_type;
WCHAR *buf = NULL, adapter_name[MAX_ADAPTER_NAME];
SP_DEVINFO_DATA dev_info_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
HKEY key;
GUID instance_id;
DEVPROPTYPE prop_type;
char *interface_name;
if (!SetupDiEnumDeviceInfo(dev_info, i, &dev_info_data)) {
@ -202,11 +175,12 @@ err_hash:
while (!SetupDiGetDeviceRegistryPropertyW(dev_info, &dev_info_data, SPDRP_HARDWAREID, &value_type, (BYTE *)buf, buf_len, &buf_len)) {
free(buf);
buf = NULL;
if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
goto skip;
break;
buf = malloc(buf_len);
if (!buf)
goto skip;
break;
}
if (!buf || value_type != REG_MULTI_SZ || buf_len < sizeof(*buf) * 2 || buf[buf_len / sizeof(*buf) - 1] || buf[buf_len / sizeof(*buf) - 2]) {
@ -223,53 +197,28 @@ err_hash:
free(buf);
if (!found)
continue;
found = false;
buf = NULL;
buf_len = 0;
key = SetupDiOpenDevRegKey(dev_info, &dev_info_data, DICS_FLAG_GLOBAL, 0, DIREG_DRV, KEY_QUERY_VALUE);
if (key == INVALID_HANDLE_VALUE)
if (!SetupDiGetDevicePropertyW(dev_info, &dev_info_data, &devpkey_name,
&prop_type, (PBYTE)adapter_name,
sizeof(adapter_name), NULL, 0) ||
prop_type != DEVPROP_TYPE_STRING)
continue;
buf_len = 39 * sizeof(*buf);
buf = malloc(buf_len);
if (!buf)
continue;
while ((ret = RegQueryValueExW(key, L"NetCfgInstanceId", NULL, &value_type, (BYTE *)buf, &buf_len)) != ERROR_SUCCESS) {
free(buf);
if (ret != ERROR_MORE_DATA)
goto cleanup_key;
buf = malloc(buf_len);
if (!buf)
goto cleanup_key;
}
if (!buf || value_type != REG_SZ || buf_len < sizeof(*buf) || buf[buf_len / sizeof(*buf) - 1])
goto cleanup_buf;
if (FAILED(CLSIDFromString(buf, &instance_id)))
goto cleanup_buf;
if (NciGetConnectionName(&instance_id, adapter_name, sizeof(adapter_name), NULL) != ERROR_SUCCESS)
goto cleanup_buf;
adapter_name[_countof(adapter_name) - 1] = L'0';
if (!adapter_name[0])
goto cleanup_buf;
continue;
buf_len = WideCharToMultiByte(CP_UTF8, 0, adapter_name, -1, NULL, 0, NULL, NULL);
if (!buf_len)
goto cleanup_buf;
continue;
interface_name = malloc(buf_len);
if (!interface_name)
goto cleanup_buf;
continue;
buf_len = WideCharToMultiByte(CP_UTF8, 0, adapter_name, -1, interface_name, buf_len, NULL, NULL);
if (!buf_len) {
free(interface_name);
goto cleanup_buf;
continue;
}
found = !strcmp(interface_name, iface);
free(interface_name);
cleanup_buf:
free(buf);
cleanup_key:
RegCloseKey(key);
if (!found)
continue;
@ -296,7 +245,6 @@ cleanup_key:
}
cleanup_instance_id:
free(buf);
skip:;
}
SetupDiDestroyDeviceInfoList(dev_info);
if (!interfaces) {

6
src/uapi/windows/wireguard.h
View file

@ -71,4 +71,10 @@ typedef struct _WG_IOCTL_INTERFACE
#define WG_IOCTL_GET CTL_CODE(45208U, 321, METHOD_OUT_DIRECT, FILE_READ_DATA | FILE_WRITE_DATA)
#define WG_IOCTL_SET CTL_CODE(45208U, 322, METHOD_IN_DIRECT, FILE_READ_DATA | FILE_WRITE_DATA)
#define DEVPKEY_WG_NAME (DEVPROPKEY) { \
{ 0x65726957, 0x7547, 0x7261, { 0x64, 0x4e, 0x61, 0x6d, 0x65, 0x4b, 0x65, 0x79 } }, \
DEVPROPID_FIRST_USABLE + 1 \
}
#endif

30
src/wincompat/include/nci.h
View file

@ -1,30 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0
*
* Copyright (C) 2018-2021 WireGuard LLC. All Rights Reserved.
*/
#ifndef _NCI_H
#define _NCI_H
#include <windows.h>
#ifdef GENERATE_LIB
#define DECLSPEC __declspec(dllexport)
#define STUB { return 0; }
#else
#define DECLSPEC __declspec(dllimport)
#define STUB ;
#endif
EXTERN_C DECLSPEC DWORD WINAPI
NciSetConnectionName(const GUID *Guid, const WCHAR *NewName) STUB
EXTERN_C DECLSPEC DWORD WINAPI
NciGetConnectionName(
const GUID *Guid,
WCHAR *Name,
DWORD InDestNameBytes,
DWORD *OutDestNameBytes) STUB
#endif