+ while(c->inbuf.len) {
+ /* Are we receiving a TCPpacket? */
+
+ if(c->tcplen) {
+ char *tcpbuffer = buffer_read(&c->inbuf, c->tcplen);
+ if(!tcpbuffer)
+ break;
+
+ if(!c->node) {
+ if(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(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] == 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;
+ }
+ }