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.c@171:f708d6776752, 2020-12-12 (annotated)

Committer:
andrewboyson
Date:
Sat Dec 12 20:10:02 2020 +0000
Revision:
171:f708d6776752
Parent:
170:96c637dc3f52
Child:
172:9bc3c7b2cca1
Modified NR to accept both IPV6 and IPV4 addresses instead of having two modules with diffrent address lengths. Encapsulated 32but address into lsb 128 bit address

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 61:aad055f1b0d1 1 #include <stdint.h>
andrewboyson 61:aad055f1b0d1 2 #include <stdbool.h>
andrewboyson 61:aad055f1b0d1 3 #include <string.h>
andrewboyson 61:aad055f1b0d1 4 #include <stdio.h>
andrewboyson 61:aad055f1b0d1 5
andrewboyson 13:9cd54f7db57a 6 #include "dns.h"
andrewboyson 13:9cd54f7db57a 7 #include "dnshdr.h"
andrewboyson 13:9cd54f7db57a 8 #include "dnsquery.h"
andrewboyson 13:9cd54f7db57a 9 #include "dnsreply.h"
andrewboyson 13:9cd54f7db57a 10 #include "dnsserver.h"
andrewboyson 32:679654f2d023 11 #include "log.h"
andrewboyson 32:679654f2d023 12 #include "dhcp.h"
andrewboyson 13:9cd54f7db57a 13
andrewboyson 83:08c983006a6e 14
andrewboyson 83:08c983006a6e 15 bool DnsSendRequestsViaIp4 = false;
andrewboyson 83:08c983006a6e 16
andrewboyson 47:73af5c0b0dc2 17 void DnsProtocolString(uint8_t protocol, int size, char* text)
andrewboyson 13:9cd54f7db57a 18 {
andrewboyson 13:9cd54f7db57a 19 switch (protocol)
andrewboyson 13:9cd54f7db57a 20 {
andrewboyson 13:9cd54f7db57a 21 case DNS_PROTOCOL_UDNS: strncpy (text, "DNS", size); break;
andrewboyson 13:9cd54f7db57a 22 case DNS_PROTOCOL_MDNS: strncpy (text, "MDNS", size); break;
andrewboyson 13:9cd54f7db57a 23 case DNS_PROTOCOL_LLMNR: strncpy (text, "LLMNR", size); break;
andrewboyson 13:9cd54f7db57a 24 default: snprintf(text, size, "%d", protocol); break;
andrewboyson 13:9cd54f7db57a 25 }
andrewboyson 13:9cd54f7db57a 26 }
andrewboyson 13:9cd54f7db57a 27
andrewboyson 47:73af5c0b0dc2 28 void DnsRecordTypeString(uint8_t recordtype, int size, char* text)
andrewboyson 13:9cd54f7db57a 29 {
andrewboyson 13:9cd54f7db57a 30 switch (recordtype)
andrewboyson 13:9cd54f7db57a 31 {
andrewboyson 13:9cd54f7db57a 32 case DNS_RECORD_A: strncpy (text, "A", size); break;
andrewboyson 13:9cd54f7db57a 33 case DNS_RECORD_AAAA: strncpy (text, "AAAA", size); break;
andrewboyson 13:9cd54f7db57a 34 case DNS_RECORD_PTR: strncpy (text, "PTR", size); break;
andrewboyson 15:6ca6778168b1 35 case DNS_RECORD_TXT: strncpy (text, "TXT", size); break;
andrewboyson 15:6ca6778168b1 36 case DNS_RECORD_SRV: strncpy (text, "SRV", size); break;
andrewboyson 13:9cd54f7db57a 37 default: snprintf(text, size, "%d", recordtype); break;
andrewboyson 13:9cd54f7db57a 38 }
andrewboyson 13:9cd54f7db57a 39 }
andrewboyson 47:73af5c0b0dc2 40 void DnsProtocolLog(uint8_t protocol)
andrewboyson 47:73af5c0b0dc2 41 {
andrewboyson 47:73af5c0b0dc2 42 switch (protocol)
andrewboyson 47:73af5c0b0dc2 43 {
andrewboyson 47:73af5c0b0dc2 44 case DNS_PROTOCOL_UDNS: Log ("DNS "); break;
andrewboyson 47:73af5c0b0dc2 45 case DNS_PROTOCOL_MDNS: Log ("MDNS "); break;
andrewboyson 47:73af5c0b0dc2 46 case DNS_PROTOCOL_LLMNR: Log ("LLMNR"); break;
andrewboyson 47:73af5c0b0dc2 47 default: LogF("%d", protocol); break;
andrewboyson 47:73af5c0b0dc2 48 }
andrewboyson 47:73af5c0b0dc2 49 }
andrewboyson 47:73af5c0b0dc2 50
andrewboyson 47:73af5c0b0dc2 51 void DnsRecordTypeLog(uint8_t recordtype)
andrewboyson 47:73af5c0b0dc2 52 {
andrewboyson 47:73af5c0b0dc2 53 switch (recordtype)
andrewboyson 47:73af5c0b0dc2 54 {
andrewboyson 47:73af5c0b0dc2 55 case DNS_RECORD_A: Log ("A" ); break;
andrewboyson 47:73af5c0b0dc2 56 case DNS_RECORD_AAAA: Log ("AAAA"); break;
andrewboyson 47:73af5c0b0dc2 57 case DNS_RECORD_PTR: Log ("PTR" ); break;
andrewboyson 47:73af5c0b0dc2 58 case DNS_RECORD_TXT: Log ("TXT" ); break;
andrewboyson 47:73af5c0b0dc2 59 case DNS_RECORD_SRV: Log ("SRV" ); break;
andrewboyson 47:73af5c0b0dc2 60 default: LogF("%d", recordtype); break;
andrewboyson 47:73af5c0b0dc2 61 }
andrewboyson 47:73af5c0b0dc2 62 }
andrewboyson 170:96c637dc3f52 63 int DnsGetNextProtocol(int protocol)
andrewboyson 41:db727df5f98b 64 {
andrewboyson 41:db727df5f98b 65 switch(protocol)
andrewboyson 41:db727df5f98b 66 {
andrewboyson 41:db727df5f98b 67 case DNS_PROTOCOL_NONE: return DNS_PROTOCOL_MDNS;
andrewboyson 41:db727df5f98b 68 case DNS_PROTOCOL_MDNS: return DNS_PROTOCOL_LLMNR;
andrewboyson 41:db727df5f98b 69 case DNS_PROTOCOL_LLMNR: return DNS_PROTOCOL_UDNS;
andrewboyson 41:db727df5f98b 70 case DNS_PROTOCOL_UDNS: return DNS_PROTOCOL_NONE;
andrewboyson 41:db727df5f98b 71 default: LogTimeF("DNS invalid protocol %d\r\n", protocol); return DNS_PROTOCOL_NONE;
andrewboyson 41:db727df5f98b 72 }
andrewboyson 41:db727df5f98b 73 }
andrewboyson 13:9cd54f7db57a 74
andrewboyson 43:bc028d5a6424 75 void DnsMain()
andrewboyson 13:9cd54f7db57a 76 {
andrewboyson 43:bc028d5a6424 77 DnsQueryMain();
andrewboyson 13:9cd54f7db57a 78 }
andrewboyson 13:9cd54f7db57a 79
andrewboyson 59:e0e556c8bd46 80 int DnsHandlePacketReceived(void (*traceback)(void), int dnsProtocol, int sizeRx, void* pPacketRx, int* pSizeTx, void* pPacketTx)
andrewboyson 13:9cd54f7db57a 81 {
andrewboyson 59:e0e556c8bd46 82 DnsHdrSetup(pPacketRx, sizeRx);
andrewboyson 13:9cd54f7db57a 83 DnsHdrRead();
andrewboyson 59:e0e556c8bd46 84
andrewboyson 13:9cd54f7db57a 85 int action;
andrewboyson 13:9cd54f7db57a 86 if (DnsHdrIsReply)
andrewboyson 13:9cd54f7db57a 87 {
andrewboyson 59:e0e556c8bd46 88 action = DnsReplyHandle(traceback, dnsProtocol);
andrewboyson 13:9cd54f7db57a 89 }
andrewboyson 13:9cd54f7db57a 90 else
andrewboyson 13:9cd54f7db57a 91 {
andrewboyson 59:e0e556c8bd46 92 action = DnsServerHandleQuery(traceback, dnsProtocol, pPacketTx, pSizeTx);
andrewboyson 13:9cd54f7db57a 93 }
andrewboyson 13:9cd54f7db57a 94 return action;
andrewboyson 13:9cd54f7db57a 95 }
andrewboyson 13:9cd54f7db57a 96
andrewboyson 171:f708d6776752 97 int DnsPollForPacketToSend(int ipType, void* pPacketTx, int* pSize)
andrewboyson 13:9cd54f7db57a 98 {
andrewboyson 171:f708d6776752 99 return DnsQueryPoll(ipType, pPacketTx, pSize);
andrewboyson 13:9cd54f7db57a 100 }