| 74 | } |
| 75 | |
| 76 | void DnsServer::onReceive(pbuf* buf, IpAddress remoteIP, uint16_t remotePort) |
| 77 | { |
| 78 | debug_d("DNS REQ from %s:%d", remoteIP.toString().c_str(), remotePort); |
| 79 | |
| 80 | // Allocated buffer with additional room for answer |
| 81 | char* buffer = new char[buf->tot_len + MAX_ANSWER_LENGTH]; |
| 82 | if(buffer == nullptr) { |
| 83 | return; |
| 84 | } |
| 85 | |
| 86 | unsigned requestLen = pbuf_copy_partial(buf, buffer, buf->tot_len, 0); |
| 87 | |
| 88 | debug_hex(DBG, "< DNS", buffer, requestLen); |
| 89 | |
| 90 | auto responseLen = processQuestion(buffer, requestLen); |
| 91 | if(responseLen != 0) { |
| 92 | debug_hex(DBG, "> DNS", buffer, responseLen); |
| 93 | sendTo(remoteIP, remotePort, buffer, responseLen); |
| 94 | } |
| 95 | |
| 96 | delete[] buffer; |
| 97 | } |
| 98 | |
| 99 | size_t DnsServer::processQuestion(char* buffer, size_t requestLen) |
| 100 | { |