//
// NCSWinHttpOpen: wrapper around WinHttpOpen
//
LPVOID NCSWinHttpOpen(LPCSTR pUserAgent, DWORD dwAccessType, LPCSTR pwszProxyName, LPCSTR pwszProxyBypass, DWORD dwFlags) {
if (pWinHttpOpen) {
LPVOID nResult = NULL;
DWORD dwType = NCSWinHttpGetAccessType(dwAccessType);
WCHAR wszUserAgent[NCS_MAX_WIDE_CHAR_LEN];
WCHAR wszProxyName[NCS_MAX_WIDE_CHAR_LEN];
WCHAR wszProxyBypass[NCS_MAX_WIDE_CHAR_LEN];
NCSCharToWideChar(pUserAgent, wszUserAgent);
NCSCharToWideChar(pwszProxyName, wszProxyName);
NCSCharToWideChar(pwszProxyBypass, wszProxyBypass);
nResult = pWinHttpOpen(wszUserAgent,
dwType,
pwszProxyName != NULL ? wszProxyName : WINHTTP_NO_PROXY_NAME,
pwszProxyBypass != NULL ? wszProxyBypass : WINHTTP_NO_PROXY_BYPASS,
dwFlags);
if (nResult == NULL) {
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL);
NCSLog(LOG_LOW, "NCScnet::NCSWinHttpOpen() FAILED : %s", (LPCTSTR)lpMsgBuf);
LocalFree( lpMsgBuf );
}
return nResult;
}
else {
return NULL;
}
}
// Detect any proxy configuration settings automatically.
static void windows_detect_autoproxy_settings() {
if (log_flags.proxy_debug) {
post_sysmon_msg("[proxy] automatic proxy check in progress");
}
HMODULE hModWinHttp = LoadLibrary("winhttp.dll");
if (!hModWinHttp) {
return;
}
pfnWinHttpOpen pWinHttpOpen =
(pfnWinHttpOpen)GetProcAddress(hModWinHttp, "WinHttpOpen");
if (!pWinHttpOpen) {
return;
}
pfnWinHttpCloseHandle pWinHttpCloseHandle =
(pfnWinHttpCloseHandle)(GetProcAddress(hModWinHttp, "WinHttpCloseHandle"));
if (!pWinHttpCloseHandle) {
return;
}
pfnWinHttpGetProxyForUrl pWinHttpGetProxyForUrl =
(pfnWinHttpGetProxyForUrl)(GetProcAddress(hModWinHttp, "WinHttpGetProxyForUrl"));
if (!pWinHttpGetProxyForUrl) {
return;
}
HINTERNET hWinHttp = NULL;
WINHTTP_AUTOPROXY_OPTIONS autoproxy_options;
WINHTTP_PROXY_INFO proxy_info;
PARSED_URL purl;
std::wstring network_test_url;
size_t pos;
memset(&autoproxy_options, 0, sizeof(autoproxy_options));
memset(&proxy_info, 0, sizeof(proxy_info));
autoproxy_options.dwFlags =
WINHTTP_AUTOPROXY_AUTO_DETECT;
autoproxy_options.dwAutoDetectFlags =
WINHTTP_AUTO_DETECT_TYPE_DHCP | WINHTTP_AUTO_DETECT_TYPE_DNS_A;
autoproxy_options.fAutoLogonIfChallenged = TRUE;
network_test_url = A2W(config.network_test_url).c_str();
hWinHttp = pWinHttpOpen(
L"BOINC client",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS,
NULL
);
char msg[1024], buf[1024];
strcpy(msg, "[proxy] ");
if (pWinHttpGetProxyForUrl(hWinHttp, network_test_url.c_str(), &autoproxy_options, &proxy_info)) {
// Apparently there are some conditions where WinHttpGetProxyForUrl can return
// success but where proxy_info.lpszProxy is null. Maybe related to UPNP?
//
// For the time being check to see if proxy_info.lpszProxy is non-null.
//
if (proxy_info.lpszProxy) {
std::string proxy(W2A(std::wstring(proxy_info.lpszProxy)));
std::string new_proxy;
if (log_flags.proxy_debug) {
strcat(msg, "proxy list: ");
strcat(msg, proxy.c_str());
}
if (!proxy.empty()) {
// Trim string if more than one proxy is defined
// proxy list is defined as:
// ([<scheme>=][<scheme>"://"]<server>[":"<port>])
// Find and erase first delimeter type.
pos = proxy.find(';');
if (pos != -1 ) {
new_proxy = proxy.erase(pos);
proxy = new_proxy;
}
// Find and erase second delimeter type.
pos = proxy.find(' ');
if (pos != -1 ) {
new_proxy = proxy.erase(pos);
proxy = new_proxy;
}
// Parse the remaining url
parse_url(proxy.c_str(), purl);
// Store the results for future use.
if (0 != strcmp(working_proxy_info.autodetect_server_name, purl.host)) {
// Reset clients connection error detection path
net_status.need_physical_connection = false;
working_proxy_info.autodetect_protocol = purl.protocol;
safe_strcpy(working_proxy_info.autodetect_server_name, purl.host);
working_proxy_info.autodetect_port = purl.port;
}
if (log_flags.proxy_debug) {
sprintf(buf, "proxy detected %s:%d", purl.host, purl.port);
strcat(msg, buf);
}
}
}
// Clean up
if (proxy_info.lpszProxy) GlobalFree(proxy_info.lpszProxy);
if (proxy_info.lpszProxyBypass) GlobalFree(proxy_info.lpszProxyBypass);
} else {
// We can get here if the user is switching from a network that
// requires a proxy to one that does not require a proxy.
working_proxy_info.autodetect_protocol = 0;
strcpy(working_proxy_info.autodetect_server_name, "");
working_proxy_info.autodetect_port = 0;
if (log_flags.proxy_debug) {
strcat(msg, "no automatic proxy detected");
}
}
if (hWinHttp) pWinHttpCloseHandle(hWinHttp);
FreeLibrary(hModWinHttp);
if (log_flags.proxy_debug) {
post_sysmon_msg(msg);
}
}
