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/nr6.c@167:3ba4e3c49631, 2020-04-02 (annotated)
- Committer:
- andrewboyson
- Date:
- Thu Apr 02 19:08:25 2020 +0000
- Revision:
- 167:3ba4e3c49631
- Parent:
- 159:3ebef2d02f7f
- Child:
- 170:96c637dc3f52
Modified resolution cache ajaxs to include the index
Who changed what in which revision?
User | Revision | Line number | New 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 | |
andrewboyson | 60:1d8c7a1e7483 | 5 | #include "log.h" |
andrewboyson | 93:580fc113d9e9 | 6 | #include "mstimer.h" |
andrewboyson | 60:1d8c7a1e7483 | 7 | #include "net.h" |
andrewboyson | 60:1d8c7a1e7483 | 8 | #include "mac.h" |
andrewboyson | 60:1d8c7a1e7483 | 9 | #include "ip6addr.h" |
andrewboyson | 128:79052cb4a41c | 10 | #include "dhcp.h" |
andrewboyson | 60:1d8c7a1e7483 | 11 | #include "dns.h" |
andrewboyson | 60:1d8c7a1e7483 | 12 | #include "dnsquery.h" |
andrewboyson | 128:79052cb4a41c | 13 | #include "dnslabel.h" |
andrewboyson | 60:1d8c7a1e7483 | 14 | #include "http.h" |
andrewboyson | 60:1d8c7a1e7483 | 15 | |
andrewboyson | 60:1d8c7a1e7483 | 16 | bool Nr6Trace = false; |
andrewboyson | 60:1d8c7a1e7483 | 17 | |
andrewboyson | 93:580fc113d9e9 | 18 | #define NAME_MAX_LENGTH 20 |
andrewboyson | 93:580fc113d9e9 | 19 | #define CACHE_TIMEOUT_MS 3600 * 1000 |
andrewboyson | 93:580fc113d9e9 | 20 | #define FREEZE_TIMEOUT_MS 1800 * 1000 |
andrewboyson | 116:60521b29e4c9 | 21 | #define REPLY_TIMEOUT_MS 1 * 1000 |
andrewboyson | 60:1d8c7a1e7483 | 22 | |
andrewboyson | 60:1d8c7a1e7483 | 23 | #define RECORDS_COUNT 20 |
andrewboyson | 60:1d8c7a1e7483 | 24 | |
andrewboyson | 60:1d8c7a1e7483 | 25 | #define STATE_EMPTY 0 |
andrewboyson | 60:1d8c7a1e7483 | 26 | #define STATE_WANT 1 |
andrewboyson | 60:1d8c7a1e7483 | 27 | #define STATE_SENT 2 |
andrewboyson | 60:1d8c7a1e7483 | 28 | #define STATE_VALID 3 |
andrewboyson | 60:1d8c7a1e7483 | 29 | |
andrewboyson | 60:1d8c7a1e7483 | 30 | #define TODO_NONE 0 |
andrewboyson | 60:1d8c7a1e7483 | 31 | #define TODO_NAME_FROM_IP 1 |
andrewboyson | 60:1d8c7a1e7483 | 32 | #define TODO_IP_FROM_NAME 2 |
andrewboyson | 60:1d8c7a1e7483 | 33 | |
andrewboyson | 60:1d8c7a1e7483 | 34 | struct record |
andrewboyson | 60:1d8c7a1e7483 | 35 | { |
andrewboyson | 60:1d8c7a1e7483 | 36 | uint32_t elapsed; |
andrewboyson | 60:1d8c7a1e7483 | 37 | char ip[16]; |
andrewboyson | 60:1d8c7a1e7483 | 38 | uint8_t todo; |
andrewboyson | 60:1d8c7a1e7483 | 39 | uint8_t state; |
andrewboyson | 60:1d8c7a1e7483 | 40 | uint8_t protocol; |
andrewboyson | 60:1d8c7a1e7483 | 41 | char name[NAME_MAX_LENGTH]; |
andrewboyson | 60:1d8c7a1e7483 | 42 | }; |
andrewboyson | 60:1d8c7a1e7483 | 43 | static struct record records[RECORDS_COUNT]; |
andrewboyson | 60:1d8c7a1e7483 | 44 | |
andrewboyson | 60:1d8c7a1e7483 | 45 | static int getExistingIp(char* ip) |
andrewboyson | 60:1d8c7a1e7483 | 46 | { |
andrewboyson | 60:1d8c7a1e7483 | 47 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 48 | { |
andrewboyson | 60:1d8c7a1e7483 | 49 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 60:1d8c7a1e7483 | 50 | if (Ip6AddressIsSame(records[i].ip, ip)) return i; |
andrewboyson | 60:1d8c7a1e7483 | 51 | } |
andrewboyson | 60:1d8c7a1e7483 | 52 | return -1; |
andrewboyson | 60:1d8c7a1e7483 | 53 | } |
andrewboyson | 60:1d8c7a1e7483 | 54 | static int getExistingName(char* name) |
andrewboyson | 60:1d8c7a1e7483 | 55 | { |
andrewboyson | 60:1d8c7a1e7483 | 56 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 57 | { |
andrewboyson | 60:1d8c7a1e7483 | 58 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 128:79052cb4a41c | 59 | if (DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 60:1d8c7a1e7483 | 60 | } |
andrewboyson | 60:1d8c7a1e7483 | 61 | return -1; |
andrewboyson | 60:1d8c7a1e7483 | 62 | } |
andrewboyson | 60:1d8c7a1e7483 | 63 | static int getNameOnly(char* name) |
andrewboyson | 60:1d8c7a1e7483 | 64 | { |
andrewboyson | 60:1d8c7a1e7483 | 65 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 66 | { |
andrewboyson | 60:1d8c7a1e7483 | 67 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 60:1d8c7a1e7483 | 68 | if (!Ip6AddressIsEmpty(records[i].ip)) continue; |
andrewboyson | 128:79052cb4a41c | 69 | if (DnsLabelIsSame(records[i].name, name)) return i; |
andrewboyson | 60:1d8c7a1e7483 | 70 | } |
andrewboyson | 60:1d8c7a1e7483 | 71 | return -1; |
andrewboyson | 60:1d8c7a1e7483 | 72 | } |
andrewboyson | 60:1d8c7a1e7483 | 73 | static int getOldest() |
andrewboyson | 60:1d8c7a1e7483 | 74 | { |
andrewboyson | 93:580fc113d9e9 | 75 | int iOldest = 0; |
andrewboyson | 93:580fc113d9e9 | 76 | uint32_t ageOldest = 0; |
andrewboyson | 60:1d8c7a1e7483 | 77 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 78 | { |
andrewboyson | 60:1d8c7a1e7483 | 79 | if (records[i].state == STATE_EMPTY) return i; //Found an empty slot so just return it |
andrewboyson | 93:580fc113d9e9 | 80 | uint32_t age = MsTimerCount - records[i].elapsed; |
andrewboyson | 93:580fc113d9e9 | 81 | if (age >= ageOldest) |
andrewboyson | 60:1d8c7a1e7483 | 82 | { |
andrewboyson | 93:580fc113d9e9 | 83 | ageOldest = age; |
andrewboyson | 93:580fc113d9e9 | 84 | iOldest = i; |
andrewboyson | 60:1d8c7a1e7483 | 85 | } |
andrewboyson | 60:1d8c7a1e7483 | 86 | } |
andrewboyson | 93:580fc113d9e9 | 87 | return iOldest; //Otherwise return the oldest |
andrewboyson | 60:1d8c7a1e7483 | 88 | } |
andrewboyson | 60:1d8c7a1e7483 | 89 | void Nr6MakeRequestForNameFromIp(char* ip) |
andrewboyson | 60:1d8c7a1e7483 | 90 | { |
andrewboyson | 60:1d8c7a1e7483 | 91 | //Don't treat non ips |
andrewboyson | 60:1d8c7a1e7483 | 92 | if (!ip[0]) return; |
andrewboyson | 60:1d8c7a1e7483 | 93 | int i; |
andrewboyson | 60:1d8c7a1e7483 | 94 | |
andrewboyson | 60:1d8c7a1e7483 | 95 | //If a record already exists then request an update |
andrewboyson | 60:1d8c7a1e7483 | 96 | i = getExistingIp(ip); |
andrewboyson | 60:1d8c7a1e7483 | 97 | if (i > -1) |
andrewboyson | 60:1d8c7a1e7483 | 98 | { |
andrewboyson | 133:a37eb35a03f1 | 99 | if (!MsTimerRelative(records[i].elapsed, FREEZE_TIMEOUT_MS)) return; |
andrewboyson | 60:1d8c7a1e7483 | 100 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 101 | { |
andrewboyson | 60:1d8c7a1e7483 | 102 | LogTimeF("NR - renew name of "); |
andrewboyson | 60:1d8c7a1e7483 | 103 | Ip6AddressLog(ip); |
andrewboyson | 60:1d8c7a1e7483 | 104 | Log("\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 105 | } |
andrewboyson | 60:1d8c7a1e7483 | 106 | records[i].todo = TODO_NAME_FROM_IP; |
andrewboyson | 60:1d8c7a1e7483 | 107 | records[i].state = STATE_WANT; |
andrewboyson | 60:1d8c7a1e7483 | 108 | records[i].protocol = DnsGetNextProtocol6(DNS_PROTOCOL_NONE); |
andrewboyson | 93:580fc113d9e9 | 109 | records[i].elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 110 | return; |
andrewboyson | 60:1d8c7a1e7483 | 111 | } |
andrewboyson | 60:1d8c7a1e7483 | 112 | |
andrewboyson | 60:1d8c7a1e7483 | 113 | //If a record does not exist then find the first empty slot and add the IP and date |
andrewboyson | 60:1d8c7a1e7483 | 114 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 115 | { |
andrewboyson | 60:1d8c7a1e7483 | 116 | LogTimeF("NR - request name of "); |
andrewboyson | 60:1d8c7a1e7483 | 117 | Ip6AddressLog(ip); |
andrewboyson | 60:1d8c7a1e7483 | 118 | Log("\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 119 | } |
andrewboyson | 60:1d8c7a1e7483 | 120 | i = getOldest(); |
andrewboyson | 60:1d8c7a1e7483 | 121 | Ip6AddressCopy(records[i].ip, ip); |
andrewboyson | 60:1d8c7a1e7483 | 122 | records[i].todo = TODO_NAME_FROM_IP; |
andrewboyson | 60:1d8c7a1e7483 | 123 | records[i].state = STATE_WANT; |
andrewboyson | 60:1d8c7a1e7483 | 124 | records[i].protocol = DnsGetNextProtocol6(DNS_PROTOCOL_NONE); |
andrewboyson | 93:580fc113d9e9 | 125 | records[i].elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 126 | records[i].name[0] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 127 | } |
andrewboyson | 60:1d8c7a1e7483 | 128 | void Nr6MakeRequestForIpFromName(char* name) |
andrewboyson | 60:1d8c7a1e7483 | 129 | { |
andrewboyson | 60:1d8c7a1e7483 | 130 | //Don't treat non names |
andrewboyson | 60:1d8c7a1e7483 | 131 | if (!name[0]) return; |
andrewboyson | 60:1d8c7a1e7483 | 132 | int i; |
andrewboyson | 60:1d8c7a1e7483 | 133 | |
andrewboyson | 60:1d8c7a1e7483 | 134 | //If a record already exists then request an update |
andrewboyson | 60:1d8c7a1e7483 | 135 | i = getExistingName(name); |
andrewboyson | 60:1d8c7a1e7483 | 136 | if (i > -1) |
andrewboyson | 60:1d8c7a1e7483 | 137 | { |
andrewboyson | 133:a37eb35a03f1 | 138 | if (!MsTimerRelative(records[i].elapsed, FREEZE_TIMEOUT_MS)) return; |
andrewboyson | 60:1d8c7a1e7483 | 139 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 140 | { |
andrewboyson | 60:1d8c7a1e7483 | 141 | LogTimeF("NR - renew IPv6 of %s\r\n", name); |
andrewboyson | 60:1d8c7a1e7483 | 142 | } |
andrewboyson | 60:1d8c7a1e7483 | 143 | records[i].todo = TODO_IP_FROM_NAME; |
andrewboyson | 60:1d8c7a1e7483 | 144 | records[i].state = STATE_WANT; |
andrewboyson | 60:1d8c7a1e7483 | 145 | records[i].protocol = DnsGetNextProtocol6(DNS_PROTOCOL_NONE); |
andrewboyson | 93:580fc113d9e9 | 146 | records[i].elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 147 | return; |
andrewboyson | 60:1d8c7a1e7483 | 148 | } |
andrewboyson | 60:1d8c7a1e7483 | 149 | |
andrewboyson | 60:1d8c7a1e7483 | 150 | //If a record does not exist then find the first empty slot and add the name and date |
andrewboyson | 60:1d8c7a1e7483 | 151 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 152 | { |
andrewboyson | 60:1d8c7a1e7483 | 153 | LogTimeF("NR - request IPv6 of %s\r\n", name); |
andrewboyson | 60:1d8c7a1e7483 | 154 | } |
andrewboyson | 60:1d8c7a1e7483 | 155 | i = getOldest(); |
andrewboyson | 60:1d8c7a1e7483 | 156 | records[i].ip[0] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 157 | records[i].todo = TODO_IP_FROM_NAME; |
andrewboyson | 60:1d8c7a1e7483 | 158 | records[i].state = STATE_WANT; |
andrewboyson | 60:1d8c7a1e7483 | 159 | records[i].protocol = DnsGetNextProtocol6(DNS_PROTOCOL_NONE); |
andrewboyson | 93:580fc113d9e9 | 160 | records[i].elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 161 | strncpy(records[i].name, name, NAME_MAX_LENGTH); |
andrewboyson | 60:1d8c7a1e7483 | 162 | records[i].name[NAME_MAX_LENGTH - 1] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 163 | } |
andrewboyson | 60:1d8c7a1e7483 | 164 | static void addIpRecord(int i, char* ip, char* name, int protocol) |
andrewboyson | 60:1d8c7a1e7483 | 165 | { |
andrewboyson | 60:1d8c7a1e7483 | 166 | records[i].todo = TODO_NONE; |
andrewboyson | 93:580fc113d9e9 | 167 | records[i].elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 168 | Ip6AddressCopy(records[i].ip, ip); |
andrewboyson | 60:1d8c7a1e7483 | 169 | records[i].protocol = protocol; |
andrewboyson | 60:1d8c7a1e7483 | 170 | records[i].state = STATE_VALID; |
andrewboyson | 60:1d8c7a1e7483 | 171 | strncpy(records[i].name, name, NAME_MAX_LENGTH); |
andrewboyson | 60:1d8c7a1e7483 | 172 | records[i].name[NAME_MAX_LENGTH - 1] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 173 | } |
andrewboyson | 60:1d8c7a1e7483 | 174 | void Nr6AddIpRecord(char* ip, char* name, int protocol) |
andrewboyson | 60:1d8c7a1e7483 | 175 | { |
andrewboyson | 60:1d8c7a1e7483 | 176 | int i; |
andrewboyson | 60:1d8c7a1e7483 | 177 | |
andrewboyson | 60:1d8c7a1e7483 | 178 | //Get existing ip and, if found, add it then clear any name only entries |
andrewboyson | 60:1d8c7a1e7483 | 179 | i = getExistingIp(ip); |
andrewboyson | 60:1d8c7a1e7483 | 180 | if (i >= 0) |
andrewboyson | 60:1d8c7a1e7483 | 181 | { |
andrewboyson | 60:1d8c7a1e7483 | 182 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 183 | { |
andrewboyson | 128:79052cb4a41c | 184 | if (DnsLabelIsSame(name, records[i].name)) LogTimeF("NR - confirm existing "); |
andrewboyson | 128:79052cb4a41c | 185 | else LogTimeF("NR - replace name for existing ip "); |
andrewboyson | 60:1d8c7a1e7483 | 186 | Ip6AddressLog(ip); |
andrewboyson | 60:1d8c7a1e7483 | 187 | Log(" == '"); |
andrewboyson | 60:1d8c7a1e7483 | 188 | Log(name); |
andrewboyson | 60:1d8c7a1e7483 | 189 | Log("'\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 190 | } |
andrewboyson | 60:1d8c7a1e7483 | 191 | addIpRecord(i, ip, name, protocol); |
andrewboyson | 60:1d8c7a1e7483 | 192 | |
andrewboyson | 60:1d8c7a1e7483 | 193 | i = getNameOnly(name); |
andrewboyson | 60:1d8c7a1e7483 | 194 | if (i >= 0) |
andrewboyson | 60:1d8c7a1e7483 | 195 | { |
andrewboyson | 60:1d8c7a1e7483 | 196 | if (Nr6Trace) LogTimeF("NR - clear name '%s' with no ip\r\n", name); |
andrewboyson | 60:1d8c7a1e7483 | 197 | records[i].state = STATE_EMPTY; |
andrewboyson | 60:1d8c7a1e7483 | 198 | } |
andrewboyson | 60:1d8c7a1e7483 | 199 | return; |
andrewboyson | 60:1d8c7a1e7483 | 200 | } |
andrewboyson | 60:1d8c7a1e7483 | 201 | |
andrewboyson | 60:1d8c7a1e7483 | 202 | //Get name only entry and, if found, add it |
andrewboyson | 60:1d8c7a1e7483 | 203 | i = getNameOnly(name); |
andrewboyson | 60:1d8c7a1e7483 | 204 | if (i >= 0) |
andrewboyson | 60:1d8c7a1e7483 | 205 | { |
andrewboyson | 60:1d8c7a1e7483 | 206 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 207 | { |
andrewboyson | 60:1d8c7a1e7483 | 208 | LogTimeF("NR - add ip for name "); |
andrewboyson | 60:1d8c7a1e7483 | 209 | Ip6AddressLog(ip); |
andrewboyson | 60:1d8c7a1e7483 | 210 | Log(" == '"); |
andrewboyson | 60:1d8c7a1e7483 | 211 | Log(name); |
andrewboyson | 60:1d8c7a1e7483 | 212 | Log("'\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 213 | } |
andrewboyson | 60:1d8c7a1e7483 | 214 | addIpRecord(i, ip, name, protocol); |
andrewboyson | 60:1d8c7a1e7483 | 215 | return; |
andrewboyson | 60:1d8c7a1e7483 | 216 | } |
andrewboyson | 60:1d8c7a1e7483 | 217 | |
andrewboyson | 60:1d8c7a1e7483 | 218 | //No other entry exists so just add it to the next available space |
andrewboyson | 60:1d8c7a1e7483 | 219 | i = getOldest(); |
andrewboyson | 60:1d8c7a1e7483 | 220 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 221 | { |
andrewboyson | 60:1d8c7a1e7483 | 222 | LogTimeF("NR - add ip for name %s "); |
andrewboyson | 60:1d8c7a1e7483 | 223 | Ip6AddressLog(ip); |
andrewboyson | 60:1d8c7a1e7483 | 224 | Log("== '"); |
andrewboyson | 60:1d8c7a1e7483 | 225 | Log(name); |
andrewboyson | 60:1d8c7a1e7483 | 226 | Log("'\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 227 | } |
andrewboyson | 60:1d8c7a1e7483 | 228 | addIpRecord(i, ip, name, protocol); |
andrewboyson | 60:1d8c7a1e7483 | 229 | } |
andrewboyson | 60:1d8c7a1e7483 | 230 | void Nr6IpToName(char* ip, char* name) |
andrewboyson | 60:1d8c7a1e7483 | 231 | { |
andrewboyson | 60:1d8c7a1e7483 | 232 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 233 | { |
andrewboyson | 60:1d8c7a1e7483 | 234 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 60:1d8c7a1e7483 | 235 | if (Ip6AddressIsSame(records[i].ip, ip)) |
andrewboyson | 60:1d8c7a1e7483 | 236 | { |
andrewboyson | 60:1d8c7a1e7483 | 237 | strcpy(name, records[i].name); |
andrewboyson | 60:1d8c7a1e7483 | 238 | return; |
andrewboyson | 60:1d8c7a1e7483 | 239 | } |
andrewboyson | 60:1d8c7a1e7483 | 240 | } |
andrewboyson | 60:1d8c7a1e7483 | 241 | name[0] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 242 | } |
andrewboyson | 60:1d8c7a1e7483 | 243 | void Nr6NameToIp(char* name, char* ip) |
andrewboyson | 60:1d8c7a1e7483 | 244 | { |
andrewboyson | 93:580fc113d9e9 | 245 | uint32_t newest = 0xFFFFFFFF; |
andrewboyson | 60:1d8c7a1e7483 | 246 | Ip6AddressClear(ip); |
andrewboyson | 60:1d8c7a1e7483 | 247 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 248 | { |
andrewboyson | 60:1d8c7a1e7483 | 249 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 60:1d8c7a1e7483 | 250 | if(Ip6AddressIsEmpty(records[i].ip)) continue; |
andrewboyson | 128:79052cb4a41c | 251 | if (!DnsLabelIsSame(records[i].name, name)) continue; |
andrewboyson | 93:580fc113d9e9 | 252 | uint32_t age = MsTimerCount - records[i].elapsed; |
andrewboyson | 93:580fc113d9e9 | 253 | if (age <= newest) |
andrewboyson | 60:1d8c7a1e7483 | 254 | { |
andrewboyson | 93:580fc113d9e9 | 255 | newest = age; |
andrewboyson | 60:1d8c7a1e7483 | 256 | Ip6AddressCopy(ip, records[i].ip); |
andrewboyson | 60:1d8c7a1e7483 | 257 | } |
andrewboyson | 60:1d8c7a1e7483 | 258 | } |
andrewboyson | 60:1d8c7a1e7483 | 259 | } |
andrewboyson | 116:60521b29e4c9 | 260 | bool Nr6HaveIpForName(char* name) |
andrewboyson | 116:60521b29e4c9 | 261 | { |
andrewboyson | 116:60521b29e4c9 | 262 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 116:60521b29e4c9 | 263 | { |
andrewboyson | 116:60521b29e4c9 | 264 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 116:60521b29e4c9 | 265 | if(Ip6AddressIsEmpty(records[i].ip)) continue; |
andrewboyson | 128:79052cb4a41c | 266 | if (!DnsLabelIsSame(records[i].name, name)) return true; |
andrewboyson | 116:60521b29e4c9 | 267 | } |
andrewboyson | 116:60521b29e4c9 | 268 | return false; |
andrewboyson | 116:60521b29e4c9 | 269 | } |
andrewboyson | 60:1d8c7a1e7483 | 270 | static char letterFromStateAndProtocol(uint8_t dnsState, uint8_t protocol) |
andrewboyson | 60:1d8c7a1e7483 | 271 | { |
andrewboyson | 60:1d8c7a1e7483 | 272 | switch (dnsState) |
andrewboyson | 60:1d8c7a1e7483 | 273 | { |
andrewboyson | 60:1d8c7a1e7483 | 274 | case STATE_WANT: |
andrewboyson | 60:1d8c7a1e7483 | 275 | case STATE_SENT: return '>'; |
andrewboyson | 60:1d8c7a1e7483 | 276 | |
andrewboyson | 60:1d8c7a1e7483 | 277 | case STATE_VALID: |
andrewboyson | 60:1d8c7a1e7483 | 278 | switch (protocol) |
andrewboyson | 60:1d8c7a1e7483 | 279 | { |
andrewboyson | 60:1d8c7a1e7483 | 280 | case DNS_PROTOCOL_UDNS: return 'd'; |
andrewboyson | 60:1d8c7a1e7483 | 281 | case DNS_PROTOCOL_MDNS: return 'm'; |
andrewboyson | 60:1d8c7a1e7483 | 282 | case DNS_PROTOCOL_LLMNR: return 'l'; |
andrewboyson | 60:1d8c7a1e7483 | 283 | case DNS_PROTOCOL_NONE: return '-'; |
andrewboyson | 60:1d8c7a1e7483 | 284 | default: return '?'; |
andrewboyson | 60:1d8c7a1e7483 | 285 | } |
andrewboyson | 60:1d8c7a1e7483 | 286 | default: return '~'; |
andrewboyson | 60:1d8c7a1e7483 | 287 | } |
andrewboyson | 60:1d8c7a1e7483 | 288 | } |
andrewboyson | 60:1d8c7a1e7483 | 289 | void Nr6SendHttp() |
andrewboyson | 60:1d8c7a1e7483 | 290 | { |
andrewboyson | 60:1d8c7a1e7483 | 291 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 60:1d8c7a1e7483 | 292 | { |
andrewboyson | 60:1d8c7a1e7483 | 293 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 60:1d8c7a1e7483 | 294 | if (!Ip6AddressIsEmpty(records[i].ip) || records[i].name[0]) |
andrewboyson | 60:1d8c7a1e7483 | 295 | { |
andrewboyson | 93:580fc113d9e9 | 296 | HttpAddF("%4u ", (MsTimerCount - records[i].elapsed) / 1000 / 60); |
andrewboyson | 60:1d8c7a1e7483 | 297 | |
andrewboyson | 60:1d8c7a1e7483 | 298 | int ipLen = Ip6AddressHttp(records[i].ip); |
andrewboyson | 159:3ebef2d02f7f | 299 | HttpAddFillChar(' ', 40 - ipLen); |
andrewboyson | 60:1d8c7a1e7483 | 300 | |
andrewboyson | 60:1d8c7a1e7483 | 301 | HttpAddChar(letterFromStateAndProtocol(records[i].state, records[i].protocol)); |
andrewboyson | 60:1d8c7a1e7483 | 302 | |
andrewboyson | 60:1d8c7a1e7483 | 303 | HttpAddChar(' '); |
andrewboyson | 60:1d8c7a1e7483 | 304 | |
andrewboyson | 60:1d8c7a1e7483 | 305 | HttpAddText(records[i].name); |
andrewboyson | 60:1d8c7a1e7483 | 306 | |
andrewboyson | 60:1d8c7a1e7483 | 307 | HttpAddChar('\r'); |
andrewboyson | 60:1d8c7a1e7483 | 308 | HttpAddChar('\n'); |
andrewboyson | 60:1d8c7a1e7483 | 309 | } |
andrewboyson | 60:1d8c7a1e7483 | 310 | } |
andrewboyson | 60:1d8c7a1e7483 | 311 | } |
andrewboyson | 140:9000ea70b220 | 312 | void Nr6SendAjax() |
andrewboyson | 140:9000ea70b220 | 313 | { |
andrewboyson | 140:9000ea70b220 | 314 | for (int i = 0; i < RECORDS_COUNT; i++) |
andrewboyson | 140:9000ea70b220 | 315 | { |
andrewboyson | 140:9000ea70b220 | 316 | if (records[i].state == STATE_EMPTY) continue; |
andrewboyson | 140:9000ea70b220 | 317 | if (!Ip6AddressIsEmpty(records[i].ip) || records[i].name[0]) |
andrewboyson | 140:9000ea70b220 | 318 | { |
andrewboyson | 167:3ba4e3c49631 | 319 | HttpAddByteAsHex(i); |
andrewboyson | 167:3ba4e3c49631 | 320 | HttpAddChar('\t'); |
andrewboyson | 140:9000ea70b220 | 321 | HttpAddInt32AsHex(MsTimerCount - records[i].elapsed); |
andrewboyson | 167:3ba4e3c49631 | 322 | HttpAddChar('\t'); |
andrewboyson | 140:9000ea70b220 | 323 | for (int b = 0; b < 16; b++) HttpAddByteAsHex(records[i].ip[b]); |
andrewboyson | 167:3ba4e3c49631 | 324 | HttpAddChar('\t'); |
andrewboyson | 140:9000ea70b220 | 325 | HttpAddChar(letterFromStateAndProtocol(records[i].state, records[i].protocol)); |
andrewboyson | 167:3ba4e3c49631 | 326 | HttpAddChar('\t'); |
andrewboyson | 140:9000ea70b220 | 327 | HttpAddText(records[i].name); |
andrewboyson | 140:9000ea70b220 | 328 | HttpAddChar('\n'); |
andrewboyson | 140:9000ea70b220 | 329 | } |
andrewboyson | 140:9000ea70b220 | 330 | } |
andrewboyson | 140:9000ea70b220 | 331 | } |
andrewboyson | 60:1d8c7a1e7483 | 332 | static void clearCache(struct record* pr) |
andrewboyson | 60:1d8c7a1e7483 | 333 | { |
andrewboyson | 133:a37eb35a03f1 | 334 | if (MsTimerRelative(pr->elapsed, CACHE_TIMEOUT_MS)) pr->state = STATE_EMPTY; |
andrewboyson | 60:1d8c7a1e7483 | 335 | } |
andrewboyson | 60:1d8c7a1e7483 | 336 | static void nextProtocol(struct record* pr) |
andrewboyson | 60:1d8c7a1e7483 | 337 | { |
andrewboyson | 133:a37eb35a03f1 | 338 | if (pr->state == STATE_SENT && MsTimerRelative(pr->elapsed, REPLY_TIMEOUT_MS) && pr->protocol) |
andrewboyson | 60:1d8c7a1e7483 | 339 | { |
andrewboyson | 60:1d8c7a1e7483 | 340 | pr->protocol = DnsGetNextProtocol6(pr->protocol); |
andrewboyson | 60:1d8c7a1e7483 | 341 | if (pr->protocol) |
andrewboyson | 60:1d8c7a1e7483 | 342 | { |
andrewboyson | 60:1d8c7a1e7483 | 343 | pr->state = STATE_WANT; |
andrewboyson | 60:1d8c7a1e7483 | 344 | } |
andrewboyson | 60:1d8c7a1e7483 | 345 | else |
andrewboyson | 60:1d8c7a1e7483 | 346 | { |
andrewboyson | 60:1d8c7a1e7483 | 347 | if (pr->todo == TODO_NAME_FROM_IP) pr->name[0] = 0; |
andrewboyson | 60:1d8c7a1e7483 | 348 | if (pr->todo == TODO_IP_FROM_NAME) Ip6AddressClear(pr->ip); |
andrewboyson | 60:1d8c7a1e7483 | 349 | pr->state = STATE_VALID; |
andrewboyson | 60:1d8c7a1e7483 | 350 | } |
andrewboyson | 93:580fc113d9e9 | 351 | pr->elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 352 | } |
andrewboyson | 60:1d8c7a1e7483 | 353 | } |
andrewboyson | 60:1d8c7a1e7483 | 354 | static void queryNameFromIp(struct record* pr) |
andrewboyson | 60:1d8c7a1e7483 | 355 | { |
andrewboyson | 60:1d8c7a1e7483 | 356 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 357 | { |
andrewboyson | 60:1d8c7a1e7483 | 358 | LogTime("NR - send "); |
andrewboyson | 60:1d8c7a1e7483 | 359 | DnsProtocolLog(pr->protocol); |
andrewboyson | 60:1d8c7a1e7483 | 360 | Log(" request for name from IP6 "); |
andrewboyson | 60:1d8c7a1e7483 | 361 | Ip6AddressLog(pr->ip); |
andrewboyson | 60:1d8c7a1e7483 | 362 | Log("\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 363 | } |
andrewboyson | 60:1d8c7a1e7483 | 364 | DnsQueryNameFromIp6(pr->ip, pr->protocol); |
andrewboyson | 60:1d8c7a1e7483 | 365 | } |
andrewboyson | 60:1d8c7a1e7483 | 366 | static void queryIpFromName(struct record* pr) |
andrewboyson | 60:1d8c7a1e7483 | 367 | { |
andrewboyson | 60:1d8c7a1e7483 | 368 | if (Nr6Trace) |
andrewboyson | 60:1d8c7a1e7483 | 369 | { |
andrewboyson | 60:1d8c7a1e7483 | 370 | LogTime("NR - send "); |
andrewboyson | 60:1d8c7a1e7483 | 371 | DnsProtocolLog(pr->protocol); |
andrewboyson | 60:1d8c7a1e7483 | 372 | Log(" request for IP6 from name '"); |
andrewboyson | 60:1d8c7a1e7483 | 373 | Log(pr->name); |
andrewboyson | 60:1d8c7a1e7483 | 374 | Log("'\r\n"); |
andrewboyson | 60:1d8c7a1e7483 | 375 | } |
andrewboyson | 60:1d8c7a1e7483 | 376 | DnsQueryIp6FromName(pr->name, pr->protocol); |
andrewboyson | 60:1d8c7a1e7483 | 377 | } |
andrewboyson | 60:1d8c7a1e7483 | 378 | static void sendRequest(struct record* pr) |
andrewboyson | 60:1d8c7a1e7483 | 379 | { |
andrewboyson | 60:1d8c7a1e7483 | 380 | if ( DnsQueryIsBusy ) return; |
andrewboyson | 60:1d8c7a1e7483 | 381 | if ( pr->state != STATE_WANT) return; |
andrewboyson | 60:1d8c7a1e7483 | 382 | if (!pr->protocol ) return; |
andrewboyson | 60:1d8c7a1e7483 | 383 | |
andrewboyson | 60:1d8c7a1e7483 | 384 | if (pr->todo == TODO_NAME_FROM_IP) queryNameFromIp(pr); |
andrewboyson | 60:1d8c7a1e7483 | 385 | if (pr->todo == TODO_IP_FROM_NAME) queryIpFromName(pr); |
andrewboyson | 60:1d8c7a1e7483 | 386 | |
andrewboyson | 60:1d8c7a1e7483 | 387 | pr->state = STATE_SENT; |
andrewboyson | 93:580fc113d9e9 | 388 | pr->elapsed = MsTimerCount; |
andrewboyson | 60:1d8c7a1e7483 | 389 | } |
andrewboyson | 60:1d8c7a1e7483 | 390 | void Nr6Main() |
andrewboyson | 60:1d8c7a1e7483 | 391 | { |
andrewboyson | 60:1d8c7a1e7483 | 392 | static int i = -1; |
andrewboyson | 60:1d8c7a1e7483 | 393 | i++; |
andrewboyson | 60:1d8c7a1e7483 | 394 | if (i >= RECORDS_COUNT) i = 0; |
andrewboyson | 60:1d8c7a1e7483 | 395 | |
andrewboyson | 60:1d8c7a1e7483 | 396 | struct record* pr = &records[i]; |
andrewboyson | 60:1d8c7a1e7483 | 397 | |
andrewboyson | 60:1d8c7a1e7483 | 398 | clearCache (pr); |
andrewboyson | 60:1d8c7a1e7483 | 399 | nextProtocol(pr); |
andrewboyson | 60:1d8c7a1e7483 | 400 | sendRequest (pr); |
andrewboyson | 60:1d8c7a1e7483 | 401 | } |
andrewboyson | 60:1d8c7a1e7483 | 402 | void Nr6Init() |
andrewboyson | 60:1d8c7a1e7483 | 403 | { |
andrewboyson | 60:1d8c7a1e7483 | 404 | for (int i = 0; i < RECORDS_COUNT; i++) records[i].state = STATE_EMPTY; |
andrewboyson | 60:1d8c7a1e7483 | 405 | } |