Andrew Boyson / net

A stack which works with or without an Mbed os library. Provides IPv4 or IPv6 with a full 1500 byte buffer.

Dependents:   oldheating gps motorhome heating

udp/dns/dns.cpp@13:9cd54f7db57a, 2017-05-01 (annotated)

Committer:
andrewboyson
Date:
Mon May 01 18:20:55 2017 +0000
Revision:
13:9cd54f7db57a
Child:
15:6ca6778168b1
Added ability to read DNS queries with encoded IP addresses

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 13:9cd54f7db57a 1 #include "dns.h"
andrewboyson 13:9cd54f7db57a 2 #include "dnshdr.h"
andrewboyson 13:9cd54f7db57a 3 #include "dnsquery.h"
andrewboyson 13:9cd54f7db57a 4 #include "dnsreply.h"
andrewboyson 13:9cd54f7db57a 5 #include "dnsserver.h"
andrewboyson 13:9cd54f7db57a 6 #include "io.h"
andrewboyson 13:9cd54f7db57a 7
andrewboyson 13:9cd54f7db57a 8 void DnsProtocolToString(uint8_t protocol, int size, char* text)
andrewboyson 13:9cd54f7db57a 9 {
andrewboyson 13:9cd54f7db57a 10 switch (protocol)
andrewboyson 13:9cd54f7db57a 11 {
andrewboyson 13:9cd54f7db57a 12 case DNS_PROTOCOL_UDNS: strncpy (text, "DNS", size); break;
andrewboyson 13:9cd54f7db57a 13 case DNS_PROTOCOL_MDNS: strncpy (text, "MDNS", size); break;
andrewboyson 13:9cd54f7db57a 14 case DNS_PROTOCOL_LLMNR: strncpy (text, "LLMNR", size); break;
andrewboyson 13:9cd54f7db57a 15 default: snprintf(text, size, "%d", protocol); break;
andrewboyson 13:9cd54f7db57a 16 }
andrewboyson 13:9cd54f7db57a 17 }
andrewboyson 13:9cd54f7db57a 18
andrewboyson 13:9cd54f7db57a 19 void DnsRecordTypeToString(uint8_t recordtype, int size, char* text)
andrewboyson 13:9cd54f7db57a 20 {
andrewboyson 13:9cd54f7db57a 21 switch (recordtype)
andrewboyson 13:9cd54f7db57a 22 {
andrewboyson 13:9cd54f7db57a 23 case DNS_RECORD_A: strncpy (text, "A", size); break;
andrewboyson 13:9cd54f7db57a 24 case DNS_RECORD_AAAA: strncpy (text, "AAAA", size); break;
andrewboyson 13:9cd54f7db57a 25 case DNS_RECORD_PTR: strncpy (text, "PTR", size); break;
andrewboyson 13:9cd54f7db57a 26 default: snprintf(text, size, "%d", recordtype); break;
andrewboyson 13:9cd54f7db57a 27 }
andrewboyson 13:9cd54f7db57a 28 }
andrewboyson 13:9cd54f7db57a 29
andrewboyson 13:9cd54f7db57a 30 void DnsTick()
andrewboyson 13:9cd54f7db57a 31 {
andrewboyson 13:9cd54f7db57a 32 DnsQueryTick();
andrewboyson 13:9cd54f7db57a 33 }
andrewboyson 13:9cd54f7db57a 34
andrewboyson 13:9cd54f7db57a 35 int DnsHandlePacketReceived(int dnsProtocol, int* pSize, void* pPacket)
andrewboyson 13:9cd54f7db57a 36 {
andrewboyson 13:9cd54f7db57a 37 DnsHdrSetup(pPacket);
andrewboyson 13:9cd54f7db57a 38 DnsHdrRead();
andrewboyson 13:9cd54f7db57a 39 int action;
andrewboyson 13:9cd54f7db57a 40 if (DnsHdrIsReply)
andrewboyson 13:9cd54f7db57a 41 {
andrewboyson 13:9cd54f7db57a 42 Led1 = 1;
andrewboyson 13:9cd54f7db57a 43 action = DnsReplyHandle(dnsProtocol, pSize);
andrewboyson 13:9cd54f7db57a 44 Led1 = 0;
andrewboyson 13:9cd54f7db57a 45 }
andrewboyson 13:9cd54f7db57a 46 else
andrewboyson 13:9cd54f7db57a 47 {
andrewboyson 13:9cd54f7db57a 48 Led2 = 1;
andrewboyson 13:9cd54f7db57a 49 action = DnsServerHandleQuery(dnsProtocol, pSize);
andrewboyson 13:9cd54f7db57a 50 Led2 = 0;
andrewboyson 13:9cd54f7db57a 51 }
andrewboyson 13:9cd54f7db57a 52 return action;
andrewboyson 13:9cd54f7db57a 53 }
andrewboyson 13:9cd54f7db57a 54
andrewboyson 13:9cd54f7db57a 55 int DnsPollForPacketToSend(void* pPacket, int* pSize)
andrewboyson 13:9cd54f7db57a 56 {
andrewboyson 13:9cd54f7db57a 57 DnsHdrSetup(pPacket);
andrewboyson 13:9cd54f7db57a 58 return DnsQueryPoll(pSize);
andrewboyson 13:9cd54f7db57a 59 }