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
resolve/nr.c@187:122fc1996c86, 2021-01-18 (annotated)
- Committer:
- andrewboyson
- Date:
- Mon Jan 18 18:23:46 2021 +0000
- Revision:
- 187:122fc1996c86
- Parent:
- 186:24198369b198
- Child:
- 188:57f44b620d0e
Changed Ip4Address to Ip4Addr.; Moved Ip6AddrIsExternal from NdpNeedsToBeRouted.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewboyson | 172:9bc3c7b2cca1 | 1 | #include <stdint.h> |
andrewboyson | 172:9bc3c7b2cca1 | 2 | #include <stdbool.h> |
andrewboyson | 172:9bc3c7b2cca1 | 3 | #include <string.h> |
andrewboyson | 172:9bc3c7b2cca1 | 4 | |
andrewboyson | 172:9bc3c7b2cca1 | 5 | #include "log.h" |
andrewboyson | 172:9bc3c7b2cca1 | 6 | #include "mstimer.h" |
andrewboyson | 172:9bc3c7b2cca1 | 7 | #include "net.h" |
andrewboyson | 172:9bc3c7b2cca1 | 8 | #include "eth.h" |
andrewboyson | 172:9bc3c7b2cca1 | 9 | #include "mac.h" |
andrewboyson | 172:9bc3c7b2cca1 | 10 | #include "dhcp.h" |
andrewboyson | 172:9bc3c7b2cca1 | 11 | #include "dns.h" |
andrewboyson | 172:9bc3c7b2cca1 | 12 | #include "dnsquery.h" |
andrewboyson | 172:9bc3c7b2cca1 | 13 | #include "dnslabel.h" |
andrewboyson | 172:9bc3c7b2cca1 | 14 | #include "http.h" |
andrewboyson | 182:ff48c6ea91c1 | 15 | #include "ip6addr.h" |
andrewboyson | 182:ff48c6ea91c1 | 16 | #include "ip4addr.h" |
andrewboyson | 182:ff48c6ea91c1 | 17 | #include "nr.h" |
andrewboyson | 183:ee809769bf89 | 18 | #include "ndp.h" |
andrewboyson | 172:9bc3c7b2cca1 | 19 | |
andrewboyson | 172:9bc3c7b2cca1 | 20 | bool Nr4Trace = false; //Do not use |
andrewboyson | 172:9bc3c7b2cca1 | 21 | bool NrTrace = false; |
andrewboyson | 172:9bc3c7b2cca1 | 22 | |
andrewboyson | 172:9bc3c7b2cca1 | 23 | #define CACHE_TIMEOUT_MS 3600 * 1000 |
andrewboyson | 172:9bc3c7b2cca1 | 24 | #define STALE_TIMEOUT_MS 1800 * 1000 |
andrewboyson | 172:9bc3c7b2cca1 | 25 | #define EMPTY_TIMEOUT_MS 300 * 1000 |
andrewboyson | 172:9bc3c7b2cca1 | 26 | #define REPLY_TIMEOUT_MS 100 |
andrewboyson | 172:9bc3c7b2cca1 | 27 | |
andrewboyson | 172:9bc3c7b2cca1 | 28 | #define RECORDS_COUNT 50 |
andrewboyson | 172:9bc3c7b2cca1 | 29 | |
andrewboyson | 172:9bc3c7b2cca1 | 30 | #define STATE_EMPTY 0 |
andrewboyson | 172:9bc3c7b2cca1 | 31 | #define STATE_WANT 1 |
andrewboyson | 172:9bc3c7b2cca1 | 32 | #define STATE_WAIT_FOR_ETH 2 |
andrewboyson | 172:9bc3c7b2cca1 | 33 | #define STATE_WAIT_TIMEOUT 3 |
andrewboyson | 172:9bc3c7b2cca1 | 34 | #define STATE_VALID 4 |
andrewboyson | 172:9bc3c7b2cca1 | 35 | |
andrewboyson | 182:ff48c6ea91c1 | 36 | #define TODO_NONE 0 |
andrewboyson | 182:ff48c6ea91c1 | 37 | #define TODO_NAME_FROM_ADDRESS 1 |
andrewboyson | 182:ff48c6ea91c1 | 38 | #define TODO_ADDRESS_FROM_NAME 2 |
andrewboyson | 182:ff48c6ea91c1 | 39 | |
andrewboyson | 182:ff48c6ea91c1 | 40 | #define ADDR_TYPE_A 4 |
andrewboyson | 182:ff48c6ea91c1 | 41 | #define ADDR_TYPE_AAAA 6 |
andrewboyson | 182:ff48c6ea91c1 | 42 | |
andrewboyson | 182:ff48c6ea91c1 | 43 | char NrTest[NR_NAME_MAX_LENGTH]; |
andrewboyson | 172:9bc3c7b2cca1 | 44 | |
andrewboyson | 172:9bc3c7b2cca1 | 45 | struct record |
andrewboyson | 172:9bc3c7b2cca1 | 46 | { |
andrewboyson | 182:ff48c6ea91c1 | 47 | uint32_t replyMs; //Need this in addition to the ageMs for when refreshing an existing entry |
andrewboyson | 172:9bc3c7b2cca1 | 48 | uint32_t ageMs; |
andrewboyson | 182:ff48c6ea91c1 | 49 | union |
andrewboyson | 182:ff48c6ea91c1 | 50 | { |
andrewboyson | 182:ff48c6ea91c1 | 51 | uint32_t A; |
andrewboyson | 182:ff48c6ea91c1 | 52 | uint8_t AAAA[16]; |
andrewboyson | 182:ff48c6ea91c1 | 53 | char address[16]; |
andrewboyson | 182:ff48c6ea91c1 | 54 | }; |
andrewboyson | 182:ff48c6ea91c1 | 55 | uint8_t addrType; //ADDR_TYPE_A (4) or ADDR_TYPE_AAAA (6) |
andrewboyson | 172:9bc3c7b2cca1 | 56 | uint8_t todo; |
andrewboyson | 172:9bc3c7b2cca1 | 57 | uint8_t state; |
andrewboyson | 172:9bc3c7b2cca1 | 58 | uint8_t dnsProtocol; |
andrewboyson | 172:9bc3c7b2cca1 | 59 | uint16_t ipProtocol; |
andrewboyson | 182:ff48c6ea91c1 | 60 | char name[NR_NAME_MAX_LENGTH]; |
andrewboyson | 172:9bc3c7b2cca1 | 61 | }; |
andrewboyson | 172:9bc3c7b2cca1 | 62 | static struct record records[RECORDS_COUNT]; |
andrewboyson | 172:9bc3c7b2cca1 | 63 | |
andrewboyson | 182:ff48c6ea91c1 | 64 | static void addrClear(const uint8_t addrType, char* ip) |
andrewboyson | 182:ff48c6ea91c1 | 65 | { |
andrewboyson | 182:ff48c6ea91c1 | 66 | switch (addrType) |
andrewboyson | 182:ff48c6ea91c1 | 67 | { |
andrewboyson | 182:ff48c6ea91c1 | 68 | case ADDR_TYPE_A : *(uint32_t*)ip = 0; break; |
andrewboyson | 182:ff48c6ea91c1 | 69 | case ADDR_TYPE_AAAA: Ip6AddrClear(ip); break; |
andrewboyson | 182:ff48c6ea91c1 | 70 | default: LogTimeF("NR - addrClear - Unknown addrType %d\r\n", addrType); break; |
andrewboyson | 182:ff48c6ea91c1 | 71 | } |
andrewboyson | 182:ff48c6ea91c1 | 72 | } |
andrewboyson | 182:ff48c6ea91c1 | 73 | static bool addrIsEmpty(const uint8_t addrType, const char* ip) |
andrewboyson | 182:ff48c6ea91c1 | 74 | { |
andrewboyson | 182:ff48c6ea91c1 | 75 | switch (addrType) |
andrewboyson | 182:ff48c6ea91c1 | 76 | { |
andrewboyson | 182:ff48c6ea91c1 | 77 | case ADDR_TYPE_A : return *(uint32_t*)ip == 0; |
andrewboyson | 182:ff48c6ea91c1 | 78 | case ADDR_TYPE_AAAA: return Ip6AddrIsEmpty(ip); |
andrewboyson | 182:ff48c6ea91c1 | 79 | default: return LogTimeF("NR - addrIsEmpty - Unknown addrType %d\r\n", addrType); |
andrewboyson | 182:ff48c6ea91c1 | 80 | } |
andrewboyson | 182:ff48c6ea91c1 | 81 | } |
andrewboyson | 182:ff48c6ea91c1 | 82 | static int addrLog(uint8_t addrType, const char* ip) |
andrewboyson | 182:ff48c6ea91c1 | 83 | { |
andrewboyson | 182:ff48c6ea91c1 | 84 | switch (addrType) |
andrewboyson | 182:ff48c6ea91c1 | 85 | { |
andrewboyson | 187:122fc1996c86 | 86 | case ADDR_TYPE_A : return Ip4AddrLog(*(uint32_t*)ip); |
andrewboyson | 182:ff48c6ea91c1 | 87 | case ADDR_TYPE_AAAA: return Ip6AddrLog(ip); |
andrewboyson | 182:ff48c6ea91c1 | 88 | default: return LogTimeF("NR - addrLog - Unknown addrType %d\r\n", addrType); |
andrewboyson | 182:ff48c6ea91c1 | 89 | } |
andrewboyson | 182:ff48c6ea91c1 | 90 | } |
andrewboyson | 182:ff48c6ea91c1 | 91 | |
andrewboyson | 182:ff48c6ea91c1 | 92 | static bool addrIsSame(uint8_t addrType, const char* ipA, const char* ipB) |
andrewboyson | 182:ff48c6ea91c1 | 93 | { |
andrewboyson | 182:ff48c6ea91c1 | 94 | switch (addrType) |
andrewboyson | 182:ff48c6ea91c1 | 95 | { |
andrewboyson | 182:ff48c6ea91c1 | 96 | case ADDR_TYPE_A : return *(uint32_t*)ipA == *(uint32_t*)ipB; |
andrewboyson | 182:ff48c6ea91c1 | 97 | case ADDR_TYPE_AAAA: return Ip6AddrIsSame(ipA, ipB); |
andrewboyson | 182:ff48c6ea91c1 | 98 | default: return LogTimeF("NR - addrIsSame - Unknown addrType %d\r\n", addrType); |
andrewboyson | 182:ff48c6ea91c1 | 99 | } |
andrewboyson | 182:ff48c6ea91c1 | 100 | } |
andrewboyson | 182:ff48c6ea91c1 | 101 | |
andrewboyson | 182:ff48c6ea91c1 | 102 | static void addrCopy(uint8_t addrType, char* ipTo, const char* ipFrom) |
andrewboyson | 182:ff48c6ea91c1 | 103 | { |
andrewboyson | 182:ff48c6ea91c1 | 104 | switch (addrType) |
andrewboyson | 182:ff48c6ea91c1 | 105 | { |
andrewboyson | 182:ff48c6ea91c1 | 106 | case ADDR_TYPE_A : *(uint32_t*)ipTo = *(uint32_t*)ipFrom; break; |
andrewboyson | 182:ff48c6ea91c1 | 107 | case ADDR_TYPE_AAAA: Ip6AddrCopy(ipTo, ipFrom); break; |
andrewboyson | 182:ff48c6ea91c1 | 108 | default: LogTimeF("NR - addrCopy - Unknown addrType %d\r\n", addrType); break; |
andrewboyson | 182:ff48c6ea91c1 | 109 | } |
andrewboyson | 182:ff48c6ea91c1 | 110 | } |
andrewboyson | 182:ff48c6ea91c1 | 111 | |
andrewboyson | 182:ff48c6ea91c1 | 112 | static int getExistingAddress(char* address, uint8_t addrType) |
andrewboyson | 172:9bc3c7b2cca1 | 113 | { |
andrewboyson | 172:9bc3c7b2cca1 | 114 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 115 | { |
andrewboyson | 172:9bc3c7b2cca1 | 116 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 117 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 118 | if (addrIsSame(addrType, records[i].address, address)) return i; |
andrewboyson | 172:9bc3c7b2cca1 | 119 | } |
andrewboyson | 172:9bc3c7b2cca1 | 120 | return -1; |
andrewboyson | 172:9bc3c7b2cca1 | 121 | } |
andrewboyson | 182:ff48c6ea91c1 | 122 | static int getExistingName(char* name, uint8_t addrType) |
andrewboyson | 172:9bc3c7b2cca1 | 123 | { |
andrewboyson | 172:9bc3c7b2cca1 | 124 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 125 | { |
andrewboyson | 172:9bc3c7b2cca1 | 126 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 127 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 128 | if (DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 182:ff48c6ea91c1 | 129 | } |
andrewboyson | 182:ff48c6ea91c1 | 130 | return -1; |
andrewboyson | 182:ff48c6ea91c1 | 131 | } |
andrewboyson | 182:ff48c6ea91c1 | 132 | static int getNameOnly(char* name, uint8_t addrType) |
andrewboyson | 182:ff48c6ea91c1 | 133 | { |
andrewboyson | 182:ff48c6ea91c1 | 134 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 182:ff48c6ea91c1 | 135 | { |
andrewboyson | 182:ff48c6ea91c1 | 136 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 137 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 138 | if (!addrIsEmpty(records[i].addrType, records[i].address)) continue; |
andrewboyson | 172:9bc3c7b2cca1 | 139 | if (DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 172:9bc3c7b2cca1 | 140 | } |
andrewboyson | 172:9bc3c7b2cca1 | 141 | return -1; |
andrewboyson | 172:9bc3c7b2cca1 | 142 | } |
andrewboyson | 182:ff48c6ea91c1 | 143 | static int getIpOnly(char* address, uint8_t addrType) |
andrewboyson | 172:9bc3c7b2cca1 | 144 | { |
andrewboyson | 172:9bc3c7b2cca1 | 145 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 146 | { |
andrewboyson | 172:9bc3c7b2cca1 | 147 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 148 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 149 | if (records[i].name[0] != 0) continue; |
andrewboyson | 182:ff48c6ea91c1 | 150 | if (addrIsSame(addrType, records[i].address, address)) return i; |
andrewboyson | 172:9bc3c7b2cca1 | 151 | } |
andrewboyson | 172:9bc3c7b2cca1 | 152 | return -1; |
andrewboyson | 172:9bc3c7b2cca1 | 153 | } |
andrewboyson | 182:ff48c6ea91c1 | 154 | static int getCorrespondingRequest(uint8_t addrType, char* address, char* name) |
andrewboyson | 172:9bc3c7b2cca1 | 155 | { |
andrewboyson | 172:9bc3c7b2cca1 | 156 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 157 | { |
andrewboyson | 172:9bc3c7b2cca1 | 158 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 159 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 160 | if (records[i].name[0] == 0 && addrIsSame(addrType, records[i].address, address)) return i; |
andrewboyson | 182:ff48c6ea91c1 | 161 | if (addrIsEmpty(records[i].addrType, records[i].address) && DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 182:ff48c6ea91c1 | 162 | } |
andrewboyson | 182:ff48c6ea91c1 | 163 | return -1; |
andrewboyson | 182:ff48c6ea91c1 | 164 | } |
andrewboyson | 182:ff48c6ea91c1 | 165 | static int getExistingEntry(uint8_t addrType, char* address, char* name) |
andrewboyson | 182:ff48c6ea91c1 | 166 | { |
andrewboyson | 182:ff48c6ea91c1 | 167 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 182:ff48c6ea91c1 | 168 | { |
andrewboyson | 182:ff48c6ea91c1 | 169 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 170 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 171 | if ( addrIsSame(addrType, records[i].address, address) && DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 172:9bc3c7b2cca1 | 172 | } |
andrewboyson | 172:9bc3c7b2cca1 | 173 | return -1; |
andrewboyson | 172:9bc3c7b2cca1 | 174 | } |
andrewboyson | 172:9bc3c7b2cca1 | 175 | static int getOldest() |
andrewboyson | 172:9bc3c7b2cca1 | 176 | { |
andrewboyson | 172:9bc3c7b2cca1 | 177 | int iOldest = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 178 | uint32_t ageOldest = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 179 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 180 | { |
andrewboyson | 172:9bc3c7b2cca1 | 181 | if (records[i].state == STATE_EMPTY) return i; //Found an empty slot so just return it |
andrewboyson | 172:9bc3c7b2cca1 | 182 | uint32_t age = MsTimerCount - records[i].ageMs; |
andrewboyson | 172:9bc3c7b2cca1 | 183 | if (age >= ageOldest) |
andrewboyson | 172:9bc3c7b2cca1 | 184 | { |
andrewboyson | 172:9bc3c7b2cca1 | 185 | ageOldest = age; |
andrewboyson | 172:9bc3c7b2cca1 | 186 | iOldest = i; |
andrewboyson | 172:9bc3c7b2cca1 | 187 | } |
andrewboyson | 172:9bc3c7b2cca1 | 188 | } |
andrewboyson | 172:9bc3c7b2cca1 | 189 | return iOldest; //Otherwise return the oldest |
andrewboyson | 172:9bc3c7b2cca1 | 190 | } |
andrewboyson | 182:ff48c6ea91c1 | 191 | static void makeRequestForNameFromAddress(uint8_t addrType, void* address ) |
andrewboyson | 172:9bc3c7b2cca1 | 192 | { |
andrewboyson | 172:9bc3c7b2cca1 | 193 | //Don't treat non ips |
andrewboyson | 182:ff48c6ea91c1 | 194 | if (addrIsEmpty(addrType, address)) return; |
andrewboyson | 172:9bc3c7b2cca1 | 195 | int i; |
andrewboyson | 172:9bc3c7b2cca1 | 196 | |
andrewboyson | 172:9bc3c7b2cca1 | 197 | //If a valid record already exists then request an update |
andrewboyson | 182:ff48c6ea91c1 | 198 | i = getExistingAddress(address, addrType); |
andrewboyson | 172:9bc3c7b2cca1 | 199 | if (i > -1) |
andrewboyson | 172:9bc3c7b2cca1 | 200 | { |
andrewboyson | 172:9bc3c7b2cca1 | 201 | if (records[i].state != STATE_VALID) return; |
andrewboyson | 172:9bc3c7b2cca1 | 202 | if (records[i].name[0] == 0) |
andrewboyson | 172:9bc3c7b2cca1 | 203 | { |
andrewboyson | 172:9bc3c7b2cca1 | 204 | if (!MsTimerRelative(records[i].ageMs, EMPTY_TIMEOUT_MS)) return; |
andrewboyson | 172:9bc3c7b2cca1 | 205 | } |
andrewboyson | 172:9bc3c7b2cca1 | 206 | else |
andrewboyson | 172:9bc3c7b2cca1 | 207 | { |
andrewboyson | 172:9bc3c7b2cca1 | 208 | if (!MsTimerRelative(records[i].ageMs, STALE_TIMEOUT_MS)) return; |
andrewboyson | 172:9bc3c7b2cca1 | 209 | } |
andrewboyson | 172:9bc3c7b2cca1 | 210 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 211 | { |
andrewboyson | 172:9bc3c7b2cca1 | 212 | LogTimeF("NR - renew name of "); |
andrewboyson | 182:ff48c6ea91c1 | 213 | addrLog(addrType, address); |
andrewboyson | 172:9bc3c7b2cca1 | 214 | Log("\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 215 | } |
andrewboyson | 172:9bc3c7b2cca1 | 216 | //Leave the address as is |
andrewboyson | 172:9bc3c7b2cca1 | 217 | //Leave the name as is |
andrewboyson | 172:9bc3c7b2cca1 | 218 | //Leave age as is |
andrewboyson | 172:9bc3c7b2cca1 | 219 | } |
andrewboyson | 172:9bc3c7b2cca1 | 220 | else |
andrewboyson | 172:9bc3c7b2cca1 | 221 | { |
andrewboyson | 172:9bc3c7b2cca1 | 222 | //If a record does not exist then find the first empty slot and add the IP and date |
andrewboyson | 172:9bc3c7b2cca1 | 223 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 224 | { |
andrewboyson | 172:9bc3c7b2cca1 | 225 | LogTimeF("NR - request name of "); |
andrewboyson | 182:ff48c6ea91c1 | 226 | addrLog(addrType, address); |
andrewboyson | 172:9bc3c7b2cca1 | 227 | Log("\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 228 | } |
andrewboyson | 172:9bc3c7b2cca1 | 229 | i = getOldest(); |
andrewboyson | 182:ff48c6ea91c1 | 230 | addrCopy(addrType, records[i].address, address); //Set the address |
andrewboyson | 182:ff48c6ea91c1 | 231 | records[i].name[0] = 0; //Clear the name |
andrewboyson | 182:ff48c6ea91c1 | 232 | records[i].ageMs = MsTimerCount; //Start age |
andrewboyson | 172:9bc3c7b2cca1 | 233 | } |
andrewboyson | 172:9bc3c7b2cca1 | 234 | records[i].todo = TODO_NAME_FROM_ADDRESS; |
andrewboyson | 182:ff48c6ea91c1 | 235 | records[i].addrType = addrType; |
andrewboyson | 172:9bc3c7b2cca1 | 236 | records[i].state = STATE_WANT; |
andrewboyson | 172:9bc3c7b2cca1 | 237 | records[i].replyMs = MsTimerCount; |
andrewboyson | 172:9bc3c7b2cca1 | 238 | records[i].ipProtocol = ETH_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 239 | records[i].dnsProtocol = DNS_PROTOCOL_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 240 | } |
andrewboyson | 182:ff48c6ea91c1 | 241 | static void makeRequestForAddressFromName(char* name, uint8_t addrType) |
andrewboyson | 172:9bc3c7b2cca1 | 242 | { |
andrewboyson | 172:9bc3c7b2cca1 | 243 | //Don't treat non names |
andrewboyson | 172:9bc3c7b2cca1 | 244 | if (!name[0]) return; |
andrewboyson | 172:9bc3c7b2cca1 | 245 | int i; |
andrewboyson | 172:9bc3c7b2cca1 | 246 | |
andrewboyson | 172:9bc3c7b2cca1 | 247 | //If a valid record already exists then request an update |
andrewboyson | 182:ff48c6ea91c1 | 248 | i = getExistingName(name, addrType); |
andrewboyson | 172:9bc3c7b2cca1 | 249 | if (i > -1) |
andrewboyson | 172:9bc3c7b2cca1 | 250 | { |
andrewboyson | 172:9bc3c7b2cca1 | 251 | if (records[i].state != STATE_VALID) return; |
andrewboyson | 182:ff48c6ea91c1 | 252 | if (addrIsEmpty(records[i].addrType, records[i].address)) |
andrewboyson | 172:9bc3c7b2cca1 | 253 | { |
andrewboyson | 172:9bc3c7b2cca1 | 254 | if (!MsTimerRelative(records[i].ageMs, EMPTY_TIMEOUT_MS)) return; |
andrewboyson | 172:9bc3c7b2cca1 | 255 | } |
andrewboyson | 172:9bc3c7b2cca1 | 256 | else |
andrewboyson | 172:9bc3c7b2cca1 | 257 | { |
andrewboyson | 172:9bc3c7b2cca1 | 258 | if (!MsTimerRelative(records[i].ageMs, STALE_TIMEOUT_MS)) return; |
andrewboyson | 172:9bc3c7b2cca1 | 259 | } |
andrewboyson | 172:9bc3c7b2cca1 | 260 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 261 | { |
andrewboyson | 182:ff48c6ea91c1 | 262 | if (addrType == ADDR_TYPE_A) LogTimeF("NR - renew A of %s\r\n", name); |
andrewboyson | 182:ff48c6ea91c1 | 263 | else LogTimeF("NR - renew AAAA of %s\r\n", name); |
andrewboyson | 172:9bc3c7b2cca1 | 264 | } |
andrewboyson | 172:9bc3c7b2cca1 | 265 | //Leave name as is |
andrewboyson | 172:9bc3c7b2cca1 | 266 | //Leave the address as is |
andrewboyson | 172:9bc3c7b2cca1 | 267 | //Leave age as is |
andrewboyson | 172:9bc3c7b2cca1 | 268 | } |
andrewboyson | 172:9bc3c7b2cca1 | 269 | else |
andrewboyson | 172:9bc3c7b2cca1 | 270 | { |
andrewboyson | 172:9bc3c7b2cca1 | 271 | //If a record does not exist then find the first empty slot and add the name and date |
andrewboyson | 172:9bc3c7b2cca1 | 272 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 273 | { |
andrewboyson | 182:ff48c6ea91c1 | 274 | if (addrType == ADDR_TYPE_A) LogTimeF("NR - request A of %s\r\n", name); |
andrewboyson | 182:ff48c6ea91c1 | 275 | else LogTimeF("NR - request AAAA of %s\r\n", name); |
andrewboyson | 172:9bc3c7b2cca1 | 276 | } |
andrewboyson | 172:9bc3c7b2cca1 | 277 | i = getOldest(); |
andrewboyson | 183:ee809769bf89 | 278 | strncpy(records[i].name, name, NR_NAME_MAX_LENGTH); //Set the name |
andrewboyson | 182:ff48c6ea91c1 | 279 | records[i].name[NR_NAME_MAX_LENGTH - 1] = 0; |
andrewboyson | 183:ee809769bf89 | 280 | addrClear(addrType, records[i].address); //Clear the address |
andrewboyson | 182:ff48c6ea91c1 | 281 | records[i].ageMs = MsTimerCount; //Start age |
andrewboyson | 172:9bc3c7b2cca1 | 282 | } |
andrewboyson | 182:ff48c6ea91c1 | 283 | records[i].todo = TODO_ADDRESS_FROM_NAME; |
andrewboyson | 182:ff48c6ea91c1 | 284 | records[i].addrType = addrType; |
andrewboyson | 172:9bc3c7b2cca1 | 285 | records[i].state = STATE_WANT; |
andrewboyson | 172:9bc3c7b2cca1 | 286 | records[i].replyMs = MsTimerCount; |
andrewboyson | 172:9bc3c7b2cca1 | 287 | records[i].ipProtocol = ETH_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 288 | records[i].dnsProtocol = DNS_PROTOCOL_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 289 | } |
andrewboyson | 182:ff48c6ea91c1 | 290 | static void updateRecord(int i, char* address, uint8_t addrType, char* name, int dnsProtocol, int ipProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 291 | { |
andrewboyson | 172:9bc3c7b2cca1 | 292 | records[i].todo = TODO_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 293 | records[i].ageMs = MsTimerCount; |
andrewboyson | 182:ff48c6ea91c1 | 294 | records[i].addrType = addrType; |
andrewboyson | 182:ff48c6ea91c1 | 295 | addrCopy(addrType, records[i].address, address); |
andrewboyson | 172:9bc3c7b2cca1 | 296 | records[i].dnsProtocol = dnsProtocol; |
andrewboyson | 172:9bc3c7b2cca1 | 297 | records[i].ipProtocol = ipProtocol; |
andrewboyson | 172:9bc3c7b2cca1 | 298 | records[i].state = STATE_VALID; |
andrewboyson | 182:ff48c6ea91c1 | 299 | strncpy(records[i].name, name, NR_NAME_MAX_LENGTH); |
andrewboyson | 182:ff48c6ea91c1 | 300 | records[i].name[NR_NAME_MAX_LENGTH - 1] = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 301 | } |
andrewboyson | 182:ff48c6ea91c1 | 302 | void addEntry(uint8_t addrType, void* address, char* name, int dnsProtocol, int ipProtocol) |
andrewboyson | 182:ff48c6ea91c1 | 303 | { |
andrewboyson | 172:9bc3c7b2cca1 | 304 | int i; |
andrewboyson | 172:9bc3c7b2cca1 | 305 | |
andrewboyson | 172:9bc3c7b2cca1 | 306 | //Print what is being handled |
andrewboyson | 172:9bc3c7b2cca1 | 307 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 308 | { |
andrewboyson | 172:9bc3c7b2cca1 | 309 | LogTimeF("NR - received "); |
andrewboyson | 182:ff48c6ea91c1 | 310 | addrLog(addrType, address); |
andrewboyson | 172:9bc3c7b2cca1 | 311 | Log(" == '"); |
andrewboyson | 172:9bc3c7b2cca1 | 312 | Log(name); |
andrewboyson | 172:9bc3c7b2cca1 | 313 | Log("'\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 314 | } |
andrewboyson | 172:9bc3c7b2cca1 | 315 | |
andrewboyson | 172:9bc3c7b2cca1 | 316 | //Ignore records which do not have both address and name |
andrewboyson | 182:ff48c6ea91c1 | 317 | if (addrIsEmpty(addrType, address) || name == 0 || name[0] == 0) |
andrewboyson | 172:9bc3c7b2cca1 | 318 | { |
andrewboyson | 172:9bc3c7b2cca1 | 319 | if (NrTrace) LogTimeF("NR -- ignoring invalid entry\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 320 | return; |
andrewboyson | 172:9bc3c7b2cca1 | 321 | } |
andrewboyson | 186:24198369b198 | 322 | //Ignore records with the name 'UNKNOWN' |
andrewboyson | 186:24198369b198 | 323 | if (strcmp(name, "UNKNOWN") == 0) return; |
andrewboyson | 172:9bc3c7b2cca1 | 324 | |
andrewboyson | 182:ff48c6ea91c1 | 325 | i = getExistingEntry(addrType, address, name); |
andrewboyson | 172:9bc3c7b2cca1 | 326 | if (i >= 0) |
andrewboyson | 182:ff48c6ea91c1 | 327 | { |
andrewboyson | 182:ff48c6ea91c1 | 328 | updateRecord(i, address, addrType, name, dnsProtocol, ipProtocol); |
andrewboyson | 182:ff48c6ea91c1 | 329 | if (NrTrace) LogTimeF("NR -- record %d - refresh existing entry\r\n", i); |
andrewboyson | 182:ff48c6ea91c1 | 330 | return; |
andrewboyson | 182:ff48c6ea91c1 | 331 | } |
andrewboyson | 182:ff48c6ea91c1 | 332 | |
andrewboyson | 182:ff48c6ea91c1 | 333 | i = getCorrespondingRequest(addrType, address, name); |
andrewboyson | 182:ff48c6ea91c1 | 334 | if (i >= 0) |
andrewboyson | 182:ff48c6ea91c1 | 335 | { |
andrewboyson | 182:ff48c6ea91c1 | 336 | updateRecord(i, address, addrType, name, dnsProtocol, ipProtocol); |
andrewboyson | 182:ff48c6ea91c1 | 337 | if (NrTrace) LogTimeF("NR -- record %d - replace request with new entry\r\n", i); |
andrewboyson | 182:ff48c6ea91c1 | 338 | i = getCorrespondingRequest(addrType, address, name); |
andrewboyson | 172:9bc3c7b2cca1 | 339 | if (i >= 0) |
andrewboyson | 172:9bc3c7b2cca1 | 340 | { |
andrewboyson | 182:ff48c6ea91c1 | 341 | if (NrTrace) LogTimeF("NR -- record %d - clear duplicate request\r\n", i, name); |
andrewboyson | 172:9bc3c7b2cca1 | 342 | records[i].state = STATE_EMPTY; |
andrewboyson | 172:9bc3c7b2cca1 | 343 | } |
andrewboyson | 172:9bc3c7b2cca1 | 344 | return; |
andrewboyson | 172:9bc3c7b2cca1 | 345 | } |
andrewboyson | 172:9bc3c7b2cca1 | 346 | |
andrewboyson | 172:9bc3c7b2cca1 | 347 | //No other entry exists so just add it to the next available space |
andrewboyson | 172:9bc3c7b2cca1 | 348 | i = getOldest(); |
andrewboyson | 182:ff48c6ea91c1 | 349 | if (NrTrace) LogTimeF("NR -- record %d - add entry\r\n", i); |
andrewboyson | 182:ff48c6ea91c1 | 350 | updateRecord(i, address, addrType, name, dnsProtocol, ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 351 | } |
andrewboyson | 182:ff48c6ea91c1 | 352 | static void addressToName(uint8_t addrType, void* address, char* name) |
andrewboyson | 172:9bc3c7b2cca1 | 353 | { |
andrewboyson | 172:9bc3c7b2cca1 | 354 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 355 | { |
andrewboyson | 172:9bc3c7b2cca1 | 356 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 357 | if (addrIsSame(addrType, records[i].address, address)) |
andrewboyson | 172:9bc3c7b2cca1 | 358 | { |
andrewboyson | 172:9bc3c7b2cca1 | 359 | strcpy(name, records[i].name); |
andrewboyson | 172:9bc3c7b2cca1 | 360 | return; |
andrewboyson | 172:9bc3c7b2cca1 | 361 | } |
andrewboyson | 172:9bc3c7b2cca1 | 362 | } |
andrewboyson | 172:9bc3c7b2cca1 | 363 | name[0] = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 364 | } |
andrewboyson | 182:ff48c6ea91c1 | 365 | static void nameToAddress(char* name, uint8_t addrType, void* address) |
andrewboyson | 172:9bc3c7b2cca1 | 366 | { |
andrewboyson | 172:9bc3c7b2cca1 | 367 | uint32_t newest = 0xFFFFFFFF; |
andrewboyson | 182:ff48c6ea91c1 | 368 | addrClear(addrType, address); |
andrewboyson | 172:9bc3c7b2cca1 | 369 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 370 | { |
andrewboyson | 172:9bc3c7b2cca1 | 371 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 372 | if (records[i].addrType != addrType) continue; |
andrewboyson | 182:ff48c6ea91c1 | 373 | if(addrIsEmpty(records[i].addrType, records[i].address)) continue; |
andrewboyson | 172:9bc3c7b2cca1 | 374 | if (!DnsLabelIsSame(records[i].name, name)) continue; |
andrewboyson | 172:9bc3c7b2cca1 | 375 | uint32_t age = MsTimerCount - records[i].ageMs; |
andrewboyson | 172:9bc3c7b2cca1 | 376 | if (age <= newest) |
andrewboyson | 172:9bc3c7b2cca1 | 377 | { |
andrewboyson | 172:9bc3c7b2cca1 | 378 | newest = age; |
andrewboyson | 182:ff48c6ea91c1 | 379 | addrCopy(addrType, address, records[i].address); |
andrewboyson | 172:9bc3c7b2cca1 | 380 | } |
andrewboyson | 172:9bc3c7b2cca1 | 381 | } |
andrewboyson | 172:9bc3c7b2cca1 | 382 | } |
andrewboyson | 182:ff48c6ea91c1 | 383 | void NrMakeRequestForNameFromAddress6(char* pAddress) { makeRequestForNameFromAddress(ADDR_TYPE_AAAA, pAddress); } |
andrewboyson | 182:ff48c6ea91c1 | 384 | void NrMakeRequestForNameFromAddress4(uint32_t address) { makeRequestForNameFromAddress(ADDR_TYPE_A, &address); } |
andrewboyson | 182:ff48c6ea91c1 | 385 | void NrMakeRequestForAddress6FromName(char* name) { makeRequestForAddressFromName(name, ADDR_TYPE_AAAA); } |
andrewboyson | 182:ff48c6ea91c1 | 386 | void NrMakeRequestForAddress4FromName(char* name) { makeRequestForAddressFromName(name, ADDR_TYPE_A ); } |
andrewboyson | 182:ff48c6ea91c1 | 387 | void NrAddAddress6(char* pAddress, char* name, int dnsProtocol) { addEntry(ADDR_TYPE_AAAA, pAddress, name, dnsProtocol, EthProtocol); } |
andrewboyson | 182:ff48c6ea91c1 | 388 | void NrAddAddress4(uint32_t address, char* name, int dnsProtocol) { addEntry(ADDR_TYPE_A, &address, name, dnsProtocol, EthProtocol); } |
andrewboyson | 182:ff48c6ea91c1 | 389 | void NrNameToAddress6(char* name, char* address) { nameToAddress(name, ADDR_TYPE_AAAA, address); } |
andrewboyson | 182:ff48c6ea91c1 | 390 | void NrNameToAddress4(char* name, uint32_t* pAddress) { nameToAddress(name, ADDR_TYPE_A, pAddress); } |
andrewboyson | 182:ff48c6ea91c1 | 391 | void NrAddress6ToName(char* pAddress, char* name) { addressToName(ADDR_TYPE_AAAA, pAddress, name); } |
andrewboyson | 182:ff48c6ea91c1 | 392 | void NrAddress4ToName(uint32_t address, char* name) { addressToName(ADDR_TYPE_A, &address, name); } |
andrewboyson | 182:ff48c6ea91c1 | 393 | |
andrewboyson | 172:9bc3c7b2cca1 | 394 | static char letterFromStateAndProtocol(uint8_t dnsState, uint8_t dnsProtocol, uint16_t ipProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 395 | { |
andrewboyson | 172:9bc3c7b2cca1 | 396 | switch (dnsState) |
andrewboyson | 172:9bc3c7b2cca1 | 397 | { |
andrewboyson | 172:9bc3c7b2cca1 | 398 | case STATE_WANT: return '}'; |
andrewboyson | 172:9bc3c7b2cca1 | 399 | case STATE_WAIT_FOR_ETH: return ']'; |
andrewboyson | 172:9bc3c7b2cca1 | 400 | case STATE_WAIT_TIMEOUT: return '>'; |
andrewboyson | 172:9bc3c7b2cca1 | 401 | |
andrewboyson | 172:9bc3c7b2cca1 | 402 | case STATE_VALID: |
andrewboyson | 172:9bc3c7b2cca1 | 403 | switch (dnsProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 404 | { |
andrewboyson | 172:9bc3c7b2cca1 | 405 | case DNS_PROTOCOL_UDNS: if (ipProtocol == ETH_IPV4) return 'd' ; else return 'D'; |
andrewboyson | 172:9bc3c7b2cca1 | 406 | case DNS_PROTOCOL_MDNS: if (ipProtocol == ETH_IPV4) return 'm' ; else return 'M'; |
andrewboyson | 172:9bc3c7b2cca1 | 407 | case DNS_PROTOCOL_LLMNR: if (ipProtocol == ETH_IPV4) return 'l' ; else return 'L'; |
andrewboyson | 172:9bc3c7b2cca1 | 408 | case DNS_PROTOCOL_NONE: return '-'; |
andrewboyson | 172:9bc3c7b2cca1 | 409 | default: return '?'; |
andrewboyson | 172:9bc3c7b2cca1 | 410 | } |
andrewboyson | 172:9bc3c7b2cca1 | 411 | default: return '~'; |
andrewboyson | 172:9bc3c7b2cca1 | 412 | } |
andrewboyson | 172:9bc3c7b2cca1 | 413 | } |
andrewboyson | 172:9bc3c7b2cca1 | 414 | void NrSendAjax() |
andrewboyson | 172:9bc3c7b2cca1 | 415 | { |
andrewboyson | 172:9bc3c7b2cca1 | 416 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 172:9bc3c7b2cca1 | 417 | { |
andrewboyson | 172:9bc3c7b2cca1 | 418 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 182:ff48c6ea91c1 | 419 | if (!addrIsEmpty(records[i].addrType, records[i].address) || records[i].name[0]) |
andrewboyson | 172:9bc3c7b2cca1 | 420 | { |
andrewboyson | 172:9bc3c7b2cca1 | 421 | HttpAddByteAsHex(i); |
andrewboyson | 172:9bc3c7b2cca1 | 422 | HttpAddChar('\t'); |
andrewboyson | 172:9bc3c7b2cca1 | 423 | HttpAddInt32AsHex(MsTimerCount - records[i].ageMs); |
andrewboyson | 172:9bc3c7b2cca1 | 424 | HttpAddChar('\t'); |
andrewboyson | 182:ff48c6ea91c1 | 425 | HttpAddNibbleAsHex(records[i].addrType); |
andrewboyson | 182:ff48c6ea91c1 | 426 | HttpAddChar('\t'); |
andrewboyson | 182:ff48c6ea91c1 | 427 | switch (records[i].addrType) |
andrewboyson | 182:ff48c6ea91c1 | 428 | { |
andrewboyson | 182:ff48c6ea91c1 | 429 | case ADDR_TYPE_A: |
andrewboyson | 182:ff48c6ea91c1 | 430 | { |
andrewboyson | 182:ff48c6ea91c1 | 431 | HttpAddInt32AsHex(records[i].A); |
andrewboyson | 182:ff48c6ea91c1 | 432 | break; |
andrewboyson | 182:ff48c6ea91c1 | 433 | } |
andrewboyson | 182:ff48c6ea91c1 | 434 | case ADDR_TYPE_AAAA: |
andrewboyson | 182:ff48c6ea91c1 | 435 | for (int b = 0; b < 16; b++) HttpAddByteAsHex(records[i].AAAA[b]); |
andrewboyson | 182:ff48c6ea91c1 | 436 | break; |
andrewboyson | 182:ff48c6ea91c1 | 437 | } |
andrewboyson | 172:9bc3c7b2cca1 | 438 | HttpAddChar('\t'); |
andrewboyson | 172:9bc3c7b2cca1 | 439 | HttpAddChar(letterFromStateAndProtocol(records[i].state, records[i].dnsProtocol, records[i].ipProtocol)); |
andrewboyson | 172:9bc3c7b2cca1 | 440 | HttpAddChar('\t'); |
andrewboyson | 172:9bc3c7b2cca1 | 441 | HttpAddText(records[i].name); |
andrewboyson | 172:9bc3c7b2cca1 | 442 | HttpAddChar('\n'); |
andrewboyson | 172:9bc3c7b2cca1 | 443 | } |
andrewboyson | 172:9bc3c7b2cca1 | 444 | } |
andrewboyson | 172:9bc3c7b2cca1 | 445 | } |
andrewboyson | 172:9bc3c7b2cca1 | 446 | static void clearCache(struct record* pr) |
andrewboyson | 172:9bc3c7b2cca1 | 447 | { |
andrewboyson | 172:9bc3c7b2cca1 | 448 | if (MsTimerRelative(pr->ageMs, CACHE_TIMEOUT_MS)) pr->state = STATE_EMPTY; |
andrewboyson | 172:9bc3c7b2cca1 | 449 | } |
andrewboyson | 172:9bc3c7b2cca1 | 450 | static void queryNameFromIp(struct record* pr) |
andrewboyson | 172:9bc3c7b2cca1 | 451 | { |
andrewboyson | 182:ff48c6ea91c1 | 452 | if (addrIsEmpty(pr->addrType, pr->address)) |
andrewboyson | 176:7eb916c22084 | 453 | { |
andrewboyson | 176:7eb916c22084 | 454 | LogTime("NR -- queryNameFromIp has no address\r\n"); |
andrewboyson | 176:7eb916c22084 | 455 | return; |
andrewboyson | 176:7eb916c22084 | 456 | } |
andrewboyson | 172:9bc3c7b2cca1 | 457 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 458 | { |
andrewboyson | 172:9bc3c7b2cca1 | 459 | LogTime("NR -- send "); |
andrewboyson | 172:9bc3c7b2cca1 | 460 | EthProtocolLog(pr->ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 461 | Log(" "); |
andrewboyson | 172:9bc3c7b2cca1 | 462 | DnsProtocolLog(pr->dnsProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 463 | Log(" request for name of "); |
andrewboyson | 182:ff48c6ea91c1 | 464 | addrLog(pr->addrType, pr->address); |
andrewboyson | 172:9bc3c7b2cca1 | 465 | Log("\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 466 | } |
andrewboyson | 182:ff48c6ea91c1 | 467 | if (pr->addrType == ADDR_TYPE_A) |
andrewboyson | 172:9bc3c7b2cca1 | 468 | { |
andrewboyson | 182:ff48c6ea91c1 | 469 | //uint32_t address4 = addrToIp4(pr->address); |
andrewboyson | 182:ff48c6ea91c1 | 470 | DnsQueryNameFromIp4(pr->A, pr->dnsProtocol, pr->ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 471 | } |
andrewboyson | 172:9bc3c7b2cca1 | 472 | else |
andrewboyson | 172:9bc3c7b2cca1 | 473 | { |
andrewboyson | 172:9bc3c7b2cca1 | 474 | DnsQueryNameFromIp6(pr->address, pr->dnsProtocol, pr->ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 475 | } |
andrewboyson | 172:9bc3c7b2cca1 | 476 | } |
andrewboyson | 182:ff48c6ea91c1 | 477 | static void queryIpFromName(struct record* pr) |
andrewboyson | 172:9bc3c7b2cca1 | 478 | { |
andrewboyson | 172:9bc3c7b2cca1 | 479 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 480 | { |
andrewboyson | 172:9bc3c7b2cca1 | 481 | LogTime("NR -- send "); |
andrewboyson | 172:9bc3c7b2cca1 | 482 | EthProtocolLog(pr->ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 483 | Log(" "); |
andrewboyson | 172:9bc3c7b2cca1 | 484 | DnsProtocolLog(pr->dnsProtocol); |
andrewboyson | 182:ff48c6ea91c1 | 485 | if (pr->addrType == ADDR_TYPE_A) Log(" request for A of name '"); |
andrewboyson | 182:ff48c6ea91c1 | 486 | else Log(" request for AAAA of name '"); |
andrewboyson | 172:9bc3c7b2cca1 | 487 | Log(pr->name); |
andrewboyson | 172:9bc3c7b2cca1 | 488 | Log("'\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 489 | } |
andrewboyson | 182:ff48c6ea91c1 | 490 | if (pr->addrType == ADDR_TYPE_A) DnsQueryIp4FromName(pr->name, pr->dnsProtocol, pr->ipProtocol); |
andrewboyson | 182:ff48c6ea91c1 | 491 | else DnsQueryIp6FromName(pr->name, pr->dnsProtocol, pr->ipProtocol); |
andrewboyson | 172:9bc3c7b2cca1 | 492 | } |
andrewboyson | 183:ee809769bf89 | 493 | static bool getIsExternal(struct record* pr) |
andrewboyson | 183:ee809769bf89 | 494 | { |
andrewboyson | 183:ee809769bf89 | 495 | switch(pr->todo) |
andrewboyson | 183:ee809769bf89 | 496 | { |
andrewboyson | 183:ee809769bf89 | 497 | case TODO_NAME_FROM_ADDRESS: |
andrewboyson | 183:ee809769bf89 | 498 | |
andrewboyson | 183:ee809769bf89 | 499 | if (pr->addrType == ADDR_TYPE_AAAA) |
andrewboyson | 183:ee809769bf89 | 500 | { |
andrewboyson | 187:122fc1996c86 | 501 | return Ip6AddrIsExternal((char*)pr->AAAA); |
andrewboyson | 183:ee809769bf89 | 502 | } |
andrewboyson | 183:ee809769bf89 | 503 | else |
andrewboyson | 183:ee809769bf89 | 504 | { |
andrewboyson | 187:122fc1996c86 | 505 | return Ip4AddrIsExternal(pr->A); |
andrewboyson | 183:ee809769bf89 | 506 | } |
andrewboyson | 183:ee809769bf89 | 507 | case TODO_ADDRESS_FROM_NAME: |
andrewboyson | 183:ee809769bf89 | 508 | return DnsLabelIsExternal(pr->name); |
andrewboyson | 183:ee809769bf89 | 509 | default: |
andrewboyson | 183:ee809769bf89 | 510 | LogTimeF("NR - getIsExternal - undefined todo '%d'\r\n", pr->todo); |
andrewboyson | 183:ee809769bf89 | 511 | return false; |
andrewboyson | 183:ee809769bf89 | 512 | } |
andrewboyson | 183:ee809769bf89 | 513 | } |
andrewboyson | 183:ee809769bf89 | 514 | static bool protocolIsAvailable(struct record* pr) |
andrewboyson | 183:ee809769bf89 | 515 | { |
andrewboyson | 183:ee809769bf89 | 516 | bool isExternal = getIsExternal(pr); |
andrewboyson | 183:ee809769bf89 | 517 | switch(pr->dnsProtocol) |
andrewboyson | 183:ee809769bf89 | 518 | { |
andrewboyson | 183:ee809769bf89 | 519 | case DNS_PROTOCOL_MDNS: return !isExternal; |
andrewboyson | 183:ee809769bf89 | 520 | case DNS_PROTOCOL_LLMNR: return !isExternal; |
andrewboyson | 183:ee809769bf89 | 521 | case DNS_PROTOCOL_UDNS: |
andrewboyson | 183:ee809769bf89 | 522 | if (pr->ipProtocol == ETH_IPV6) |
andrewboyson | 183:ee809769bf89 | 523 | { |
andrewboyson | 183:ee809769bf89 | 524 | if (Ip6AddrIsEmpty(NdpDnsServer)) return false; //No DNS server so not ok |
andrewboyson | 183:ee809769bf89 | 525 | if (isExternal) return true; //External and have DNS server so ok |
andrewboyson | 183:ee809769bf89 | 526 | return false; //Internal but have no DHCP6 domain name so not ok |
andrewboyson | 183:ee809769bf89 | 527 | } |
andrewboyson | 183:ee809769bf89 | 528 | else //ETH_IPV4 |
andrewboyson | 183:ee809769bf89 | 529 | { |
andrewboyson | 183:ee809769bf89 | 530 | if (DhcpDnsServerIp == 0) return false; //No DNS server so not ok |
andrewboyson | 183:ee809769bf89 | 531 | if (isExternal) return true; //External and have DNS server so ok |
andrewboyson | 183:ee809769bf89 | 532 | return DhcpDomainName[0] != 0; //Internal and have domain name so ok |
andrewboyson | 183:ee809769bf89 | 533 | } |
andrewboyson | 183:ee809769bf89 | 534 | case DNS_PROTOCOL_NONE: return true; //No protocol is valid as it designates 'not found' |
andrewboyson | 183:ee809769bf89 | 535 | default: return false; |
andrewboyson | 183:ee809769bf89 | 536 | } |
andrewboyson | 183:ee809769bf89 | 537 | } |
andrewboyson | 172:9bc3c7b2cca1 | 538 | static void makeNextProtocol(struct record* pr) |
andrewboyson | 172:9bc3c7b2cca1 | 539 | { |
andrewboyson | 172:9bc3c7b2cca1 | 540 | //If current protocol is empty or unknown then return with the first. |
andrewboyson | 172:9bc3c7b2cca1 | 541 | switch (pr->ipProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 542 | { |
andrewboyson | 172:9bc3c7b2cca1 | 543 | case ETH_IPV6: break; |
andrewboyson | 172:9bc3c7b2cca1 | 544 | case ETH_IPV4: break; |
andrewboyson | 172:9bc3c7b2cca1 | 545 | default: |
andrewboyson | 172:9bc3c7b2cca1 | 546 | pr->ipProtocol = ETH_IPV6; |
andrewboyson | 172:9bc3c7b2cca1 | 547 | pr->dnsProtocol = DNS_PROTOCOL_MDNS; |
andrewboyson | 172:9bc3c7b2cca1 | 548 | return; |
andrewboyson | 172:9bc3c7b2cca1 | 549 | } |
andrewboyson | 172:9bc3c7b2cca1 | 550 | switch (pr->dnsProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 551 | { |
andrewboyson | 172:9bc3c7b2cca1 | 552 | case DNS_PROTOCOL_MDNS: break; |
andrewboyson | 172:9bc3c7b2cca1 | 553 | case DNS_PROTOCOL_LLMNR: break; |
andrewboyson | 172:9bc3c7b2cca1 | 554 | case DNS_PROTOCOL_UDNS: break; |
andrewboyson | 172:9bc3c7b2cca1 | 555 | default: |
andrewboyson | 172:9bc3c7b2cca1 | 556 | pr->ipProtocol = ETH_IPV6; |
andrewboyson | 172:9bc3c7b2cca1 | 557 | pr->dnsProtocol = DNS_PROTOCOL_MDNS; |
andrewboyson | 172:9bc3c7b2cca1 | 558 | return; |
andrewboyson | 172:9bc3c7b2cca1 | 559 | |
andrewboyson | 172:9bc3c7b2cca1 | 560 | } |
andrewboyson | 172:9bc3c7b2cca1 | 561 | switch(pr->dnsProtocol) |
andrewboyson | 172:9bc3c7b2cca1 | 562 | { |
andrewboyson | 172:9bc3c7b2cca1 | 563 | case DNS_PROTOCOL_MDNS: |
andrewboyson | 172:9bc3c7b2cca1 | 564 | if (pr->ipProtocol == ETH_IPV6) |
andrewboyson | 172:9bc3c7b2cca1 | 565 | { |
andrewboyson | 172:9bc3c7b2cca1 | 566 | pr->ipProtocol = ETH_IPV4; |
andrewboyson | 172:9bc3c7b2cca1 | 567 | } |
andrewboyson | 172:9bc3c7b2cca1 | 568 | else |
andrewboyson | 172:9bc3c7b2cca1 | 569 | { |
andrewboyson | 172:9bc3c7b2cca1 | 570 | pr->ipProtocol = ETH_IPV6; |
andrewboyson | 172:9bc3c7b2cca1 | 571 | pr->dnsProtocol = DNS_PROTOCOL_LLMNR; |
andrewboyson | 172:9bc3c7b2cca1 | 572 | } |
andrewboyson | 172:9bc3c7b2cca1 | 573 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 574 | case DNS_PROTOCOL_LLMNR: |
andrewboyson | 172:9bc3c7b2cca1 | 575 | if (pr->ipProtocol == ETH_IPV6) |
andrewboyson | 172:9bc3c7b2cca1 | 576 | { |
andrewboyson | 172:9bc3c7b2cca1 | 577 | pr->ipProtocol = ETH_IPV4; |
andrewboyson | 172:9bc3c7b2cca1 | 578 | } |
andrewboyson | 172:9bc3c7b2cca1 | 579 | else |
andrewboyson | 172:9bc3c7b2cca1 | 580 | { |
andrewboyson | 172:9bc3c7b2cca1 | 581 | pr->ipProtocol = ETH_IPV6; |
andrewboyson | 172:9bc3c7b2cca1 | 582 | pr->dnsProtocol = DNS_PROTOCOL_UDNS; |
andrewboyson | 172:9bc3c7b2cca1 | 583 | } |
andrewboyson | 172:9bc3c7b2cca1 | 584 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 585 | case DNS_PROTOCOL_UDNS: |
andrewboyson | 172:9bc3c7b2cca1 | 586 | if (pr->ipProtocol == ETH_IPV6) |
andrewboyson | 172:9bc3c7b2cca1 | 587 | { |
andrewboyson | 172:9bc3c7b2cca1 | 588 | pr->ipProtocol = ETH_IPV4; |
andrewboyson | 172:9bc3c7b2cca1 | 589 | } |
andrewboyson | 172:9bc3c7b2cca1 | 590 | else |
andrewboyson | 172:9bc3c7b2cca1 | 591 | { |
andrewboyson | 172:9bc3c7b2cca1 | 592 | pr->ipProtocol = ETH_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 593 | pr->dnsProtocol = DNS_PROTOCOL_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 594 | } |
andrewboyson | 172:9bc3c7b2cca1 | 595 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 596 | } |
andrewboyson | 172:9bc3c7b2cca1 | 597 | } |
andrewboyson | 172:9bc3c7b2cca1 | 598 | |
andrewboyson | 172:9bc3c7b2cca1 | 599 | static void sendRequest(struct record* pr) |
andrewboyson | 172:9bc3c7b2cca1 | 600 | { |
andrewboyson | 172:9bc3c7b2cca1 | 601 | if (DnsQueryIsBusy) return; |
andrewboyson | 172:9bc3c7b2cca1 | 602 | |
andrewboyson | 172:9bc3c7b2cca1 | 603 | switch (pr->state) |
andrewboyson | 172:9bc3c7b2cca1 | 604 | { |
andrewboyson | 172:9bc3c7b2cca1 | 605 | case STATE_WANT: |
andrewboyson | 172:9bc3c7b2cca1 | 606 | makeNextProtocol(pr); |
andrewboyson | 183:ee809769bf89 | 607 | while (!protocolIsAvailable(pr)) makeNextProtocol(pr); |
andrewboyson | 172:9bc3c7b2cca1 | 608 | if (!pr->dnsProtocol || !pr->ipProtocol) //No more protocols to try so resolution has failed |
andrewboyson | 172:9bc3c7b2cca1 | 609 | { |
andrewboyson | 172:9bc3c7b2cca1 | 610 | if (pr->todo == TODO_NAME_FROM_ADDRESS) |
andrewboyson | 172:9bc3c7b2cca1 | 611 | { |
andrewboyson | 172:9bc3c7b2cca1 | 612 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 613 | { |
andrewboyson | 183:ee809769bf89 | 614 | LogTimeF("NR - record %d - request for name of ", pr - records); |
andrewboyson | 182:ff48c6ea91c1 | 615 | addrLog(pr->addrType, pr->address); |
andrewboyson | 172:9bc3c7b2cca1 | 616 | Log(" has timed out\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 617 | } |
andrewboyson | 172:9bc3c7b2cca1 | 618 | pr->name[0] = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 619 | } |
andrewboyson | 182:ff48c6ea91c1 | 620 | if (pr->todo == TODO_ADDRESS_FROM_NAME) |
andrewboyson | 172:9bc3c7b2cca1 | 621 | { |
andrewboyson | 172:9bc3c7b2cca1 | 622 | if (NrTrace) |
andrewboyson | 172:9bc3c7b2cca1 | 623 | { |
andrewboyson | 183:ee809769bf89 | 624 | LogTimeF("NR - record %d request for address of '", pr - records); |
andrewboyson | 172:9bc3c7b2cca1 | 625 | Log(pr->name); |
andrewboyson | 172:9bc3c7b2cca1 | 626 | Log("' has timed out\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 627 | Log("\r\n"); |
andrewboyson | 172:9bc3c7b2cca1 | 628 | } |
andrewboyson | 182:ff48c6ea91c1 | 629 | addrClear(pr->addrType, pr->address); |
andrewboyson | 172:9bc3c7b2cca1 | 630 | } |
andrewboyson | 172:9bc3c7b2cca1 | 631 | pr->todo = TODO_NONE; |
andrewboyson | 172:9bc3c7b2cca1 | 632 | pr->state = STATE_VALID; |
andrewboyson | 172:9bc3c7b2cca1 | 633 | pr->ageMs = MsTimerCount; |
andrewboyson | 172:9bc3c7b2cca1 | 634 | } |
andrewboyson | 172:9bc3c7b2cca1 | 635 | else |
andrewboyson | 172:9bc3c7b2cca1 | 636 | { |
andrewboyson | 172:9bc3c7b2cca1 | 637 | pr->state = STATE_WAIT_FOR_ETH; |
andrewboyson | 172:9bc3c7b2cca1 | 638 | } |
andrewboyson | 172:9bc3c7b2cca1 | 639 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 640 | case STATE_WAIT_FOR_ETH: |
andrewboyson | 172:9bc3c7b2cca1 | 641 | if (!DnsQueryIsBusy) |
andrewboyson | 172:9bc3c7b2cca1 | 642 | { |
andrewboyson | 172:9bc3c7b2cca1 | 643 | switch (pr->todo) |
andrewboyson | 172:9bc3c7b2cca1 | 644 | { |
andrewboyson | 182:ff48c6ea91c1 | 645 | case TODO_NAME_FROM_ADDRESS: queryNameFromIp(pr); break; |
andrewboyson | 182:ff48c6ea91c1 | 646 | case TODO_ADDRESS_FROM_NAME: queryIpFromName(pr); break; |
andrewboyson | 172:9bc3c7b2cca1 | 647 | } |
andrewboyson | 172:9bc3c7b2cca1 | 648 | pr->state = STATE_WAIT_TIMEOUT; |
andrewboyson | 172:9bc3c7b2cca1 | 649 | pr->replyMs = MsTimerCount; |
andrewboyson | 172:9bc3c7b2cca1 | 650 | } |
andrewboyson | 172:9bc3c7b2cca1 | 651 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 652 | case STATE_WAIT_TIMEOUT: |
andrewboyson | 172:9bc3c7b2cca1 | 653 | if (MsTimerRelative(pr->replyMs, REPLY_TIMEOUT_MS)) |
andrewboyson | 172:9bc3c7b2cca1 | 654 | { |
andrewboyson | 172:9bc3c7b2cca1 | 655 | pr->state = STATE_WANT; |
andrewboyson | 172:9bc3c7b2cca1 | 656 | } |
andrewboyson | 172:9bc3c7b2cca1 | 657 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 658 | default: |
andrewboyson | 172:9bc3c7b2cca1 | 659 | break; |
andrewboyson | 172:9bc3c7b2cca1 | 660 | } |
andrewboyson | 172:9bc3c7b2cca1 | 661 | } |
andrewboyson | 172:9bc3c7b2cca1 | 662 | void NrMain() |
andrewboyson | 172:9bc3c7b2cca1 | 663 | { |
andrewboyson | 172:9bc3c7b2cca1 | 664 | static int i = -1; |
andrewboyson | 172:9bc3c7b2cca1 | 665 | i++; |
andrewboyson | 172:9bc3c7b2cca1 | 666 | if (i >= RECORDS_COUNT) i = 0; |
andrewboyson | 172:9bc3c7b2cca1 | 667 | |
andrewboyson | 172:9bc3c7b2cca1 | 668 | struct record* pr = &records[i]; |
andrewboyson | 172:9bc3c7b2cca1 | 669 | |
andrewboyson | 172:9bc3c7b2cca1 | 670 | clearCache (pr); |
andrewboyson | 172:9bc3c7b2cca1 | 671 | sendRequest (pr); |
andrewboyson | 172:9bc3c7b2cca1 | 672 | } |
andrewboyson | 172:9bc3c7b2cca1 | 673 | void NrInit() |
andrewboyson | 172:9bc3c7b2cca1 | 674 | { |
andrewboyson | 172:9bc3c7b2cca1 | 675 | for (int i = 0; i < RECORDS_COUNT; i++) records[i].state = STATE_EMPTY; |
andrewboyson | 172:9bc3c7b2cca1 | 676 | } |