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ipc: use more clever PnP enumerator

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2021-10-06 17:18:40 -06:00
parent 3ba6527130
commit 1ee37b8e48
3 changed files with 16 additions and 60 deletions
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2
src/Makefile
View File

@ -62,7 +62,7 @@ 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 -Lwincompat
LDLIBS += -lws2_32 -lsetupapi -lole32 -ladvapi32 -lntdll -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

66
src/ipc-windows.h
View File

@ -19,10 +19,11 @@
static bool have_cached_kernel_interfaces;
static struct hashtable cached_kernel_interfaces;
static const DEVPROPKEY devpkey_name = DEVPKEY_WG_NAME;
extern bool is_win7;
static int kernel_get_wireguard_interfaces(struct string_list *list)
{
HDEVINFO dev_info = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, NULL, NULL, DIGCF_PRESENT, NULL, NULL, NULL);
HDEVINFO dev_info = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, is_win7 ? L"ROOT\\WIREGUARD" : L"SWD\\WireGuard", NULL, DIGCF_PRESENT, NULL, NULL, NULL);
bool will_have_cached_kernel_interfaces = true;
if (dev_info == INVALID_HANDLE_VALUE) {
@ -31,9 +32,8 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
}
for (DWORD i = 0;; ++i) {
bool found = false;
DWORD buf_len = 0, value_type;
WCHAR *buf = NULL, adapter_name[MAX_ADAPTER_NAME];
DWORD buf_len;
WCHAR adapter_name[MAX_ADAPTER_NAME];
SP_DEVINFO_DATA dev_info_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
DEVPROPTYPE prop_type;
ULONG status, problem_code;
@ -46,31 +46,6 @@ static int kernel_get_wireguard_interfaces(struct string_list *list)
continue;
}
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)
break;
buf = malloc(buf_len);
if (!buf)
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]) {
free(buf);
continue;
}
for (WCHAR *item = buf; *item; item += wcslen(item) + 1) {
if (!_wcsicmp(item, L"wireguard")) {
found = true;
break;
}
}
free(buf);
if (!found)
continue;
if (!SetupDiGetDevicePropertyW(dev_info, &dev_info_data, &devpkey_name,
&prop_type, (PBYTE)adapter_name,
sizeof(adapter_name), NULL, 0) ||
@ -155,14 +130,14 @@ err_hash:
}
}
dev_info = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, NULL, NULL, DIGCF_PRESENT, NULL, NULL, NULL);
dev_info = SetupDiGetClassDevsExW(&GUID_DEVCLASS_NET, is_win7 ? L"ROOT\\WIREGUARD" : L"SWD\\WireGuard", NULL, DIGCF_PRESENT, NULL, NULL, NULL);
if (dev_info == INVALID_HANDLE_VALUE)
return NULL;
for (DWORD i = 0; !interfaces; ++i) {
bool found = false;
DWORD buf_len = 0, value_type;
WCHAR *buf = NULL, adapter_name[MAX_ADAPTER_NAME];
bool found;
DWORD buf_len;
WCHAR *buf, adapter_name[MAX_ADAPTER_NAME];
SP_DEVINFO_DATA dev_info_data = { .cbSize = sizeof(SP_DEVINFO_DATA) };
DEVPROPTYPE prop_type;
char *interface_name;
@ -173,31 +148,6 @@ err_hash:
continue;
}
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)
break;
buf = malloc(buf_len);
if (!buf)
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]) {
free(buf);
continue;
}
for (WCHAR *item = buf; *item; item += wcslen(item) + 1) {
if (!_wcsicmp(item, L"wireguard")) {
found = true;
break;
}
}
free(buf);
if (!found)
continue;
if (!SetupDiGetDevicePropertyW(dev_info, &dev_info_data, &devpkey_name,
&prop_type, (PBYTE)adapter_name,
sizeof(adapter_name), NULL, 0) ||

8
src/wincompat/init.c
View File

@ -10,16 +10,22 @@
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x4
#endif
extern void NTAPI RtlGetNtVersionNumbers(DWORD *major, DWORD *minor, DWORD *build);
bool is_win7 = false;
__attribute__((constructor)) static void init(void)
{
char *colormode;
DWORD console_mode;
DWORD console_mode, major, minor;
HANDLE stdout_handle;
WSADATA wsaData;
if (!SetDllDirectoryA("") || !SetDefaultDllDirectories(LOAD_LIBRARY_SEARCH_SYSTEM32))
abort();
RtlGetNtVersionNumbers(&major, &minor, NULL);
is_win7 = (major == 6 && minor <= 1) || major < 6;
WSAStartup(MAKEWORD(2, 2), &wsaData);
stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE); // We don't close this.