+
+ if(!c->node) {
+ if(c->outgoing && proxytype == PROXY_SOCKS4 && c->allow_request == ID) {
+ if(tcpbuffer[0] == 0 && tcpbuffer[1] == 0x5a) {
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request granted");
+ } else {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Proxy request rejected");
+ return false;
+ }
+ } else if(c->outgoing && proxytype == PROXY_SOCKS5 && c->allow_request == ID) {
+ if(tcpbuffer[0] != 5) {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Invalid response from proxy server");
+ return false;
+ }
+
+ if(tcpbuffer[1] == (char)0xff) {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Proxy request rejected: unsuitable authentication method");
+ return false;
+ }
+
+ if(tcpbuffer[2] != 5) {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Invalid response from proxy server");
+ return false;
+ }
+
+ if(tcpbuffer[3] == 0) {
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request granted");
+ } else {
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Proxy request rejected");
+ return false;
+ }
+ } else {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "c->tcplen set but c->node is NULL!");
+ abort();
+ }
+ } else {
+ if(c->allow_request == ALL) {
+ receive_tcppacket(c, tcpbuffer, c->tcplen);
+ } else {
+ logger(DEBUG_CONNECTIONS, LOG_ERR, "Got unauthorized TCP packet from %s (%s)", c->name, c->hostname);
+ return false;
+ }
+ }
+
+ c->tcplen = 0;