bool NetlibDoConnect(NetlibConnection *nlc)
{
NETLIBOPENCONNECTION *nloc = &nlc->nloc;
NetlibUser *nlu = nlc->nlu;
nlc->sinProxy.sin_family = AF_INET;
mir_free(nlc->szProxyServer); nlc->szProxyServer = NULL;
bool usingProxy = false, forceHttps = false;
if (nlu->settings.useProxy)
{
if (nlu->settings.proxyType == PROXYTYPE_IE)
{
usingProxy = NetlibGetIeProxyConn(nlc, false);
}
else
{
if (nlu->settings.szProxyServer && nlu->settings.szProxyServer[0])
{
nlc->szProxyServer = mir_strdup(nlu->settings.szProxyServer);
nlc->wProxyPort = nlu->settings.wProxyPort;
nlc->proxyType = nlu->settings.proxyType;
usingProxy = true;
}
}
}
retry:
if (usingProxy)
{
NetlibLogf(nlu,"(%p) Resolving proxy %s:%d for %s:%d ....", nlc, nlc->szProxyServer, nlc->wProxyPort, nloc->szHost, nloc->wPort);
nlc->sinProxy.sin_port = htons(nlc->wProxyPort);
nlc->sinProxy.sin_addr.S_un.S_addr = DnsLookup(nlu, nlc->szProxyServer);
if (nlc->sinProxy.sin_addr.S_un.S_addr == 0)
{
usingProxy = false;
nlc->proxyType = 0;
}
}
if (!usingProxy)
{
NetlibLogf(nlu,"(%p) Connecting to server %s:%d....", nlc, nloc->szHost, nloc->wPort);
nlc->sinProxy.sin_port = htons(nloc->wPort);
nlc->sinProxy.sin_addr.S_un.S_addr = DnsLookup(nlu, nloc->szHost);
}
else
NetlibLogf(nlu,"(%p) Connecting to proxy %s:%d for %s:%d ....", nlc, nlc->szProxyServer, nlc->wProxyPort, nloc->szHost, nloc->wPort);
if (nlc->sinProxy.sin_addr.S_un.S_addr == 0) return false;
if (my_connect(nlc, nloc) == SOCKET_ERROR)
{
if (usingProxy && (nlc->proxyType == PROXYTYPE_HTTPS || nlc->proxyType == PROXYTYPE_HTTP))
{
usingProxy = false;
if (!NetlibHttpFallbackToDirect(nlc, nlu, nloc))
{
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "connect", WSAGetLastError());
return false;
}
}
else
{
if (nlu->settings.useProxy && !usingProxy && nlu->settings.proxyType == PROXYTYPE_IE && !forceHttps)
{
forceHttps = true;
usingProxy = NetlibGetIeProxyConn(nlc, true);
if (usingProxy) goto retry;
}
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "connect", WSAGetLastError());
return false;
}
}
if (usingProxy && !((nloc->flags & (NLOCF_HTTP | NLOCF_SSL)) == NLOCF_HTTP &&
(nlc->proxyType == PROXYTYPE_HTTP || nlc->proxyType == PROXYTYPE_HTTPS)))
{
if (!WaitUntilWritable(nlc->s, 30000)) return false;
switch (nlc->proxyType)
{
case PROXYTYPE_SOCKS4:
if (!NetlibInitSocks4Connection(nlc, nlu, nloc)) return false;
break;
case PROXYTYPE_SOCKS5:
if (!NetlibInitSocks5Connection(nlc, nlu, nloc)) return false;
break;
case PROXYTYPE_HTTPS:
nlc->proxyAuthNeeded = true;
if (!NetlibInitHttpsConnection(nlc, nlu, nloc))
{
usingProxy = false;
if (!NetlibHttpFallbackToDirect(nlc, nlu, nloc))
return false;
}
break;
case PROXYTYPE_HTTP:
nlc->proxyAuthNeeded = true;
if (!(nlu->user.flags & NUF_HTTPGATEWAY || nloc->flags & NLOCF_HTTPGATEWAY) || nloc->flags & NLOCF_SSL)
{
//NLOCF_HTTP not specified and no HTTP gateway available: try HTTPS
if (!NetlibInitHttpsConnection(nlc, nlu, nloc))
{
//can't do HTTPS: try direct
usingProxy = false;
if (!NetlibHttpFallbackToDirect(nlc, nlu, nloc))
return false;
}
}
else
{
if (!NetlibInitHttpConnection(nlc, nlu, nloc)) return false;
}
break;
default:
SetLastError(ERROR_INVALID_PARAMETER);
FreePartiallyInitedConnection(nlc);
return false;
}
}
else if (nloc->flags & NLOCF_HTTPGATEWAY)
{
if (!NetlibInitHttpConnection(nlc, nlu, nloc)) return false;
nlc->usingDirectHttpGateway = true;
}
NetlibLogf(nlu,"(%d) Connected to %s:%d", nlc->s, nloc->szHost, nloc->wPort);
if (NLOCF_SSL & nloc->flags)
{
return NetlibStartSsl((WPARAM)nlc, 0) != 0;
}
return true;
}
bool NetlibDoConnect(NetlibConnection *nlc)
{
NETLIBOPENCONNECTION *nloc = &nlc->nloc;
NetlibUser *nlu = nlc->nlu;
mir_free(nlc->szProxyServer); nlc->szProxyServer = NULL;
bool usingProxy = false, forceHttps = false;
if (nlu->settings.useProxy) {
if (nlu->settings.proxyType == PROXYTYPE_IE)
usingProxy = NetlibGetIeProxyConn(nlc, false);
else {
if (nlu->settings.szProxyServer && nlu->settings.szProxyServer[0]) {
nlc->szProxyServer = mir_strdup(nlu->settings.szProxyServer);
nlc->wProxyPort = nlu->settings.wProxyPort;
nlc->proxyType = nlu->settings.proxyType;
usingProxy = true;
}
}
}
while (!my_connect(nlc, nloc)) {
// Fallback to direct only when using HTTP proxy, as this is what used by companies
// If other type of proxy used it's an indication of security nutcase, leave him alone
if (usingProxy && (nlc->proxyType == PROXYTYPE_HTTPS || nlc->proxyType == PROXYTYPE_HTTP)) {
usingProxy = false;
nlc->proxyType = 0;
NetlibLogf(nlu,"Fallback to direct connection");
continue;
}
if (nlu->settings.useProxy && !usingProxy && nlu->settings.proxyType == PROXYTYPE_IE && !forceHttps) {
forceHttps = true;
usingProxy = NetlibGetIeProxyConn(nlc, true);
if (usingProxy) continue;
}
NetlibLogf(nlu, "%s %d: %s() failed (%u)", __FILE__, __LINE__, "connect", WSAGetLastError());
return false;
}
if (usingProxy && !((nloc->flags & (NLOCF_HTTP | NLOCF_SSL)) == NLOCF_HTTP && (nlc->proxyType == PROXYTYPE_HTTP || nlc->proxyType == PROXYTYPE_HTTPS))) {
if (!WaitUntilWritable(nlc->s, 30000))
return false;
switch (nlc->proxyType) {
case PROXYTYPE_SOCKS4:
if (!NetlibInitSocks4Connection(nlc, nlu, nloc))
return false;
break;
case PROXYTYPE_SOCKS5:
if (!NetlibInitSocks5Connection(nlc, nlu, nloc))
return false;
break;
case PROXYTYPE_HTTPS:
nlc->proxyAuthNeeded = true;
if (!NetlibInitHttpsConnection(nlc, nlu, nloc)) {
usingProxy = false;
if (!NetlibHttpFallbackToDirect(nlc, nlu, nloc))
return false;
}
break;
case PROXYTYPE_HTTP:
nlc->proxyAuthNeeded = true;
if (!(nlu->user.flags & NUF_HTTPGATEWAY || nloc->flags & NLOCF_HTTPGATEWAY) || nloc->flags & NLOCF_SSL) {
//NLOCF_HTTP not specified and no HTTP gateway available: try HTTPS
if (!NetlibInitHttpsConnection(nlc, nlu, nloc)) {
//can't do HTTPS: try direct
usingProxy = false;
if (!NetlibHttpFallbackToDirect(nlc, nlu, nloc))
return false;
}
}
else if (!NetlibInitHttpConnection(nlc, nlu, nloc))
return false;
break;
default:
SetLastError(ERROR_INVALID_PARAMETER);
FreePartiallyInitedConnection(nlc);
return false;
}
}
else if (nloc->flags & NLOCF_HTTPGATEWAY) {
if (!NetlibInitHttpConnection(nlc, nlu, nloc)) return false;
nlc->usingDirectHttpGateway = true;
}
NetlibLogf(nlu, "(%d) Connected to %s:%d", nlc->s, nloc->szHost, nloc->wPort);
if (NLOCF_SSL & nloc->flags)
return NetlibStartSsl((WPARAM)nlc, 0) != 0;
return true;
}