Xuyi Wang / mDNS

mDNS

Dependents:   OS

This is a mDNS server.

mDNSResponder.cpp@1:163dc87e95c3, 2015-08-11 (annotated)

Committer:
JBRYU
Date:
Tue Aug 11 17:11:58 2015 +0000
Revision:
1:163dc87e95c3
Parent:
0:0df3300689d2
Child:
2:2b00b659497a
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JBRYU 0:0df3300689d2 1 /*
JBRYU 0:0df3300689d2 2 ----------------------------------------------------
JBRYU 0:0df3300689d2 3 Made by JB RYU, KOR - 2015
JBRYU 0:0df3300689d2 4
JBRYU 0:0df3300689d2 5 origin - C / mdns-sd on CONTIKI-ipv6(uIP) I'd made
JBRYU 0:0df3300689d2 6
JBRYU 0:0df3300689d2 7 now - C++ (actually singleton C-style process)/
JBRYU 0:0df3300689d2 8 mdns-sd on MBED-ipv4(LWIP)
JBRYU 0:0df3300689d2 9 ----------------------------------------------------
JBRYU 0:0df3300689d2 10 More progressed things than others :
JBRYU 0:0df3300689d2 11 {
JBRYU 0:0df3300689d2 12 Parsing multi-Query (OK),
JBRYU 0:0df3300689d2 13 Check duplicated host and avoid (OK)
JBRYU 0:0df3300689d2 14 }
JBRYU 0:0df3300689d2 15
JBRYU 0:0df3300689d2 16 TODO : (Actully these are not necessary for my prj)
JBRYU 0:0df3300689d2 17 {
JBRYU 0:0df3300689d2 18 register multiple service,
JBRYU 0:0df3300689d2 19 managing records-caches
JBRYU 0:0df3300689d2 20 }
JBRYU 0:0df3300689d2 21 ----------------------------------------------------
JBRYU 0:0df3300689d2 22 Notes :
JBRYU 0:0df3300689d2 23 srv-instance-name = host-name
JBRYU 0:0df3300689d2 24 SEP-<rand 2byte><IP-hex 2byte>
JBRYU 0:0df3300689d2 25 There are some problems about lose-connection because
JBRYU 0:0df3300689d2 26 MBED-netsocketIFs are unstable (I think).
JBRYU 0:0df3300689d2 27 ----------------------------------------------------
JBRYU 0:0df3300689d2 28 */
JBRYU 0:0df3300689d2 29
JBRYU 0:0df3300689d2 30
JBRYU 0:0df3300689d2 31 #include "lwip/opt.h"
JBRYU 0:0df3300689d2 32 #include "mbed.h"
JBRYU 0:0df3300689d2 33 #include "EthernetInterface.h"
JBRYU 0:0df3300689d2 34 #include <cstring>
JBRYU 0:0df3300689d2 35 #if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
JBRYU 0:0df3300689d2 36
JBRYU 0:0df3300689d2 37 #include "mDNSResponder.h"
JBRYU 0:0df3300689d2 38 #include "dns-sd.h"
JBRYU 0:0df3300689d2 39
JBRYU 0:0df3300689d2 40 #define MDNS_DBG 1
JBRYU 0:0df3300689d2 41 #if (MDNS_DBG > 0)
JBRYU 0:0df3300689d2 42 #define MDBG(x...) printf(x)
JBRYU 0:0df3300689d2 43 #else
JBRYU 0:0df3300689d2 44 #define MDBG(x...)
JBRYU 0:0df3300689d2 45 #endif
JBRYU 0:0df3300689d2 46
JBRYU 0:0df3300689d2 47 mDNSResponder::mDNSResponder() : IP_str(NULL)
JBRYU 0:0df3300689d2 48 {}
JBRYU 0:0df3300689d2 49
JBRYU 0:0df3300689d2 50 /* initialize static instance */
JBRYU 0:0df3300689d2 51 char mDNSResponder::query_buf[1500] =
JBRYU 0:0df3300689d2 52 {
JBRYU 0:0df3300689d2 53 0,
JBRYU 0:0df3300689d2 54 };
JBRYU 0:0df3300689d2 55
JBRYU 0:0df3300689d2 56 MY_SD_DOMAINS mDNSResponder::SD_domains =
JBRYU 0:0df3300689d2 57 {
JBRYU 0:0df3300689d2 58 .numbers = N_CONTIKI_SERVICES,
JBRYU 0:0df3300689d2 59 .elements =
JBRYU 0:0df3300689d2 60 {
JBRYU 0:0df3300689d2 61 {
JBRYU 0:0df3300689d2 62 .inst_len = 8,
JBRYU 0:0df3300689d2 63 .instance = {'S','E','P','-','0','0','0','0'},
JBRYU 0:0df3300689d2 64 .serv_len = 12,
JBRYU 0:0df3300689d2 65 .service = {'_','s','m','a','r','t','e','n','e','r','g','y',},
JBRYU 0:0df3300689d2 66 .trl_len = 4,
JBRYU 0:0df3300689d2 67 .trl = {'_','t','c','p'},
JBRYU 0:0df3300689d2 68 .domain_len = 5,
JBRYU 0:0df3300689d2 69 .domain = {'l','o','c','a','l'},
JBRYU 0:0df3300689d2 70 .txt =
JBRYU 0:0df3300689d2 71 {
JBRYU 0:0df3300689d2 72 .len_txtvers = 9,
JBRYU 0:0df3300689d2 73 .txtvers = {'t','x','t','v','e','r','s','=','1'},
JBRYU 0:0df3300689d2 74 .len_dcap = 10,
JBRYU 0:0df3300689d2 75 .dcap = {'d','c','a','p','=','/','d','c','a','p'},
JBRYU 0:0df3300689d2 76 .len_path = 9,
JBRYU 0:0df3300689d2 77 .path = {'p','a','t','h','=','/','u','p','t'},
JBRYU 0:0df3300689d2 78 .len_https = 9,
JBRYU 0:0df3300689d2 79 .https = {'h','t','t','p','s','=','4','4','3'},
JBRYU 0:0df3300689d2 80 .len_level = 9,
JBRYU 0:0df3300689d2 81 .level = {'l','e','v','e','l','=','-','S','0'},
JBRYU 0:0df3300689d2 82 }
JBRYU 0:0df3300689d2 83 },
JBRYU 0:0df3300689d2 84 },
JBRYU 0:0df3300689d2 85 };
JBRYU 0:0df3300689d2 86
JBRYU 0:0df3300689d2 87 char mDNSResponder::
JBRYU 0:0df3300689d2 88 PTR_query_name[PTR_QUERY_NAME_LEN] =
JBRYU 0:0df3300689d2 89 {
JBRYU 0:0df3300689d2 90 0x05, 0x5f,
JBRYU 0:0df3300689d2 91 0x68, 0x74, 0x74, 0x70, 0x04, 0x5f, 0x74, 0x63,
JBRYU 0:0df3300689d2 92 0x70, 0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x00,
JBRYU 0:0df3300689d2 93 };
JBRYU 0:0df3300689d2 94
JBRYU 0:0df3300689d2 95 struct dns_hdr mDNSResponder::SD_res_hdr =
JBRYU 0:0df3300689d2 96 {
JBRYU 0:0df3300689d2 97 .id = 0x0000,
JBRYU 0:0df3300689d2 98 .flags1 = DNS_FLAG1_RESPONSE | DNS_FLAG1_AUTHORATIVE,
JBRYU 0:0df3300689d2 99 .flags2 = 0,
JBRYU 0:0df3300689d2 100 .numquestions = 0,
JBRYU 0:0df3300689d2 101 .numanswers = htons(1),
JBRYU 0:0df3300689d2 102 .numauthrr = 0,
JBRYU 0:0df3300689d2 103 .numextrarr = 0,
JBRYU 0:0df3300689d2 104 };
JBRYU 0:0df3300689d2 105
JBRYU 0:0df3300689d2 106 QR_MAP mDNSResponder::g_queries = {0,};
JBRYU 0:0df3300689d2 107
JBRYU 0:0df3300689d2 108 /* end of initialize static instance */
JBRYU 0:0df3300689d2 109
JBRYU 0:0df3300689d2 110 mDNSResponder::~mDNSResponder()
JBRYU 0:0df3300689d2 111 {
JBRYU 0:0df3300689d2 112 close();
JBRYU 0:0df3300689d2 113 }
JBRYU 0:0df3300689d2 114
JBRYU 0:0df3300689d2 115 void mDNSResponder::
JBRYU 0:0df3300689d2 116 register_service(char* number)
JBRYU 0:0df3300689d2 117 {
JBRYU 0:0df3300689d2 118 memcpy(&SD_domains.elements[0].instance[4], number, 4);
JBRYU 0:0df3300689d2 119 }
JBRYU 0:0df3300689d2 120
JBRYU 0:0df3300689d2 121 void mDNSResponder::
JBRYU 0:0df3300689d2 122 query_domain(void)
JBRYU 0:0df3300689d2 123 {
JBRYU 0:0df3300689d2 124 volatile uint8_t i;
JBRYU 0:0df3300689d2 125 struct dns_hdr* hdr;
JBRYU 0:0df3300689d2 126 struct dns_question* question;
JBRYU 0:0df3300689d2 127 uint8_t *query;
JBRYU 0:0df3300689d2 128
JBRYU 0:0df3300689d2 129 MDBG("start probe duplicate domain\n");
JBRYU 0:0df3300689d2 130
JBRYU 0:0df3300689d2 131 hdr = (struct dns_hdr *)query_buf;
JBRYU 0:0df3300689d2 132
JBRYU 0:0df3300689d2 133 memset(hdr, 0, sizeof(struct dns_hdr));
JBRYU 0:0df3300689d2 134
JBRYU 0:0df3300689d2 135 hdr->id = 0;
JBRYU 0:0df3300689d2 136 hdr->flags1 = DNS_FLAG1_RD;
JBRYU 0:0df3300689d2 137 hdr->numquestions = htons(1);
JBRYU 0:0df3300689d2 138
JBRYU 0:0df3300689d2 139 query = (unsigned char *)query_buf + sizeof(*hdr);
JBRYU 0:0df3300689d2 140
JBRYU 0:0df3300689d2 141 memcpy(query, &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 142 SD_domains.elements[0].inst_len+1);
JBRYU 0:0df3300689d2 143 query += SD_domains.elements[0].inst_len+1;
JBRYU 0:0df3300689d2 144
JBRYU 0:0df3300689d2 145 memcpy(query, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 146 SD_domains.elements[0].domain_len+1);
JBRYU 0:0df3300689d2 147 query += SD_domains.elements[0].domain_len+1;
JBRYU 0:0df3300689d2 148
JBRYU 0:0df3300689d2 149 *query = 0x00;
JBRYU 0:0df3300689d2 150 query++;
JBRYU 0:0df3300689d2 151
JBRYU 0:0df3300689d2 152 question = (struct dns_question*)query;
JBRYU 0:0df3300689d2 153 question->type = htons(DNS_TYPE_ANY);
JBRYU 0:0df3300689d2 154 question->obj = htons(DNS_CLASS_IN);
JBRYU 0:0df3300689d2 155
JBRYU 0:0df3300689d2 156 query += 4;
JBRYU 0:0df3300689d2 157
JBRYU 0:0df3300689d2 158 MDBG("send probe query(%d)\n",
JBRYU 0:0df3300689d2 159 (uint16_t)((uint32_t)query - (uint32_t)query_buf));
JBRYU 0:0df3300689d2 160
JBRYU 0:0df3300689d2 161 mdns_sock.sendTo(send_endpt, query_buf,
JBRYU 0:0df3300689d2 162 (query - (uint8_t *) query_buf));
JBRYU 0:0df3300689d2 163 }
JBRYU 0:0df3300689d2 164
JBRYU 0:0df3300689d2 165 void mDNSResponder::announce(char* ip)
JBRYU 0:0df3300689d2 166 {
JBRYU 0:0df3300689d2 167 send_endpt.set_address(MCAST, MDNS_PORT);
JBRYU 0:0df3300689d2 168
JBRYU 0:0df3300689d2 169 mdns_sock.bind(MDNS_PORT);
JBRYU 0:0df3300689d2 170 if (mdns_sock.join_multicast_group(MCAST) != 0)
JBRYU 0:0df3300689d2 171 {
JBRYU 0:0df3300689d2 172 printf("Error joining the multicast group\n");
JBRYU 0:0df3300689d2 173 while (true) {}
JBRYU 0:0df3300689d2 174 }
JBRYU 0:0df3300689d2 175
JBRYU 0:0df3300689d2 176 IP_str = ip;
JBRYU 0:0df3300689d2 177
JBRYU 0:0df3300689d2 178 IPstringToByte(IP_str);
JBRYU 0:0df3300689d2 179
JBRYU 0:0df3300689d2 180 char instance_number[4];
JBRYU 0:0df3300689d2 181 sprintf(instance_number, "%.2d%.2X",
JBRYU 0:0df3300689d2 182 0, IP_byte[3]);
JBRYU 0:0df3300689d2 183 register_service(instance_number);
JBRYU 0:0df3300689d2 184
JBRYU 0:0df3300689d2 185 query_domain();
JBRYU 0:0df3300689d2 186 }
JBRYU 0:0df3300689d2 187
JBRYU 0:0df3300689d2 188 void mDNSResponder::close()
JBRYU 0:0df3300689d2 189 {
JBRYU 0:0df3300689d2 190 mdns_sock.close();
JBRYU 0:0df3300689d2 191 }
JBRYU 0:0df3300689d2 192
JBRYU 0:0df3300689d2 193 void mDNSResponder::IPstringToByte(char* IPstr)
JBRYU 0:0df3300689d2 194 {
JBRYU 0:0df3300689d2 195 char ip1[4] = {0,}; char ip2[4] = {0,};
JBRYU 0:0df3300689d2 196 char ip3[4] = {0,}; char ip4[4] = {0,};
JBRYU 0:0df3300689d2 197 char* p;
JBRYU 0:0df3300689d2 198 char* p_dot;
JBRYU 0:0df3300689d2 199
JBRYU 0:0df3300689d2 200 p_dot = strstr(IPstr, ".");
JBRYU 0:0df3300689d2 201 memcpy(ip1, IPstr, p_dot-IPstr);
JBRYU 0:0df3300689d2 202 IP_byte[0] = (uint8_t)atoi((const char*)ip1);
JBRYU 0:0df3300689d2 203
JBRYU 0:0df3300689d2 204 p = p_dot + 1;
JBRYU 0:0df3300689d2 205 p_dot = strstr(p, ".");
JBRYU 0:0df3300689d2 206 memcpy(ip2, p, p_dot-p);
JBRYU 0:0df3300689d2 207 IP_byte[1] = (uint8_t)atoi((const char*)ip2);
JBRYU 0:0df3300689d2 208
JBRYU 0:0df3300689d2 209 p = p_dot + 1;
JBRYU 0:0df3300689d2 210 p_dot = strstr(p, ".");
JBRYU 0:0df3300689d2 211 memcpy(ip3, p, p_dot-p);
JBRYU 0:0df3300689d2 212 IP_byte[2] = (uint8_t)atoi((const char*)ip3);
JBRYU 0:0df3300689d2 213
JBRYU 0:0df3300689d2 214 p = p_dot + 1;
JBRYU 0:0df3300689d2 215 memcpy(ip4, p, 3);
JBRYU 0:0df3300689d2 216 IP_byte[3] = (uint8_t)atoi((const char*)ip4);
JBRYU 0:0df3300689d2 217 }
JBRYU 0:0df3300689d2 218
JBRYU 0:0df3300689d2 219 char* mDNSResponder::
JBRYU 0:0df3300689d2 220 skip_name(char* query)
JBRYU 0:0df3300689d2 221 {
JBRYU 0:0df3300689d2 222 unsigned char n;
JBRYU 0:0df3300689d2 223
JBRYU 0:0df3300689d2 224 do
JBRYU 0:0df3300689d2 225 {
JBRYU 0:0df3300689d2 226 n = *query;
JBRYU 0:0df3300689d2 227 if(n & 0xc0)
JBRYU 0:0df3300689d2 228 {
JBRYU 0:0df3300689d2 229 ++query;
JBRYU 0:0df3300689d2 230 break;
JBRYU 0:0df3300689d2 231 }
JBRYU 0:0df3300689d2 232
JBRYU 0:0df3300689d2 233 ++query;
JBRYU 0:0df3300689d2 234
JBRYU 0:0df3300689d2 235 while(n > 0)
JBRYU 0:0df3300689d2 236 {
JBRYU 0:0df3300689d2 237 ++query;
JBRYU 0:0df3300689d2 238 --n;
JBRYU 0:0df3300689d2 239 };
JBRYU 0:0df3300689d2 240 } while(*query != 0);
JBRYU 0:0df3300689d2 241
JBRYU 0:0df3300689d2 242 return query + 1;
JBRYU 0:0df3300689d2 243 }
JBRYU 0:0df3300689d2 244
JBRYU 0:0df3300689d2 245 char* mDNSResponder::
JBRYU 0:0df3300689d2 246 decode_name(char* query, char* packet)
JBRYU 0:0df3300689d2 247 {
JBRYU 0:0df3300689d2 248 char c = 0xff;
JBRYU 0:0df3300689d2 249 static char dest[MAX_DOMAIN_LEN];
JBRYU 0:0df3300689d2 250 int len = 0;
JBRYU 0:0df3300689d2 251
JBRYU 0:0df3300689d2 252 memset(dest, 0, MAX_DOMAIN_LEN);
JBRYU 0:0df3300689d2 253
JBRYU 0:0df3300689d2 254 MDBG("\n");
JBRYU 0:0df3300689d2 255 while((len < MAX_DOMAIN_LEN) && (c != 0x00))
JBRYU 0:0df3300689d2 256 {
JBRYU 0:0df3300689d2 257 c = *query;
JBRYU 0:0df3300689d2 258
JBRYU 0:0df3300689d2 259 while (c == 0xc0)
JBRYU 0:0df3300689d2 260 {
JBRYU 0:0df3300689d2 261 MDBG("%s : read offset\n", __FUNCTION__);
JBRYU 0:0df3300689d2 262 query++;
JBRYU 0:0df3300689d2 263 query = (char*)((uint32_t)packet + *query);
JBRYU 0:0df3300689d2 264 c = *query;
JBRYU 0:0df3300689d2 265 }
JBRYU 0:0df3300689d2 266
JBRYU 0:0df3300689d2 267 memset(&dest[len], c, 1);
JBRYU 0:0df3300689d2 268
JBRYU 0:0df3300689d2 269 query++;
JBRYU 0:0df3300689d2 270 len++;
JBRYU 0:0df3300689d2 271 }
JBRYU 0:0df3300689d2 272
JBRYU 0:0df3300689d2 273 MDBG("\n%s : %s\n", __FUNCTION__, dest);
JBRYU 0:0df3300689d2 274 return dest;
JBRYU 0:0df3300689d2 275 }
JBRYU 0:0df3300689d2 276
JBRYU 0:0df3300689d2 277 void mDNSResponder::
JBRYU 0:0df3300689d2 278 send_dns_ans(struct dns_hdr* hdr)
JBRYU 0:0df3300689d2 279 {
JBRYU 0:0df3300689d2 280 int i = 0;
JBRYU 0:0df3300689d2 281 uint8_t* ptr;
JBRYU 0:0df3300689d2 282 uint32_t off_inst = 0;
JBRYU 0:0df3300689d2 283 uint32_t off_serv = 0;
JBRYU 0:0df3300689d2 284 uint32_t off_domain = 0;
JBRYU 0:0df3300689d2 285 PTR_ANS* ptr_ans;
JBRYU 0:0df3300689d2 286 SRV_ANS* srv_ans;
JBRYU 0:0df3300689d2 287 struct dns_answer* A_ans;
JBRYU 0:0df3300689d2 288 TXT_ANS* txt_ans;
JBRYU 0:0df3300689d2 289 int numbers = g_queries.numbers;
JBRYU 0:0df3300689d2 290
JBRYU 0:0df3300689d2 291 uint8_t ans_mask = DNS_TYPE_ANY; //later, for addtional ans
JBRYU 0:0df3300689d2 292
JBRYU 0:0df3300689d2 293 memcpy(hdr, &SD_res_hdr, sizeof(struct dns_hdr));
JBRYU 0:0df3300689d2 294 hdr->numanswers = htons(numbers);
JBRYU 0:0df3300689d2 295 ptr = (uint8_t*)hdr + sizeof(struct dns_hdr);
JBRYU 0:0df3300689d2 296
JBRYU 0:0df3300689d2 297 while (numbers--)
JBRYU 0:0df3300689d2 298 {
JBRYU 0:0df3300689d2 299 switch (g_queries.reqs[i])
JBRYU 0:0df3300689d2 300 {
JBRYU 0:0df3300689d2 301 case DNS_TYPE_PTR :
JBRYU 0:0df3300689d2 302 ans_mask = ans_mask ^ DNS_TYPE_PTR;
JBRYU 0:0df3300689d2 303 if (off_serv == 0)
JBRYU 0:0df3300689d2 304 {
JBRYU 0:0df3300689d2 305 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 306
JBRYU 0:0df3300689d2 307 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 308 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 309 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 310
JBRYU 0:0df3300689d2 311 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 312 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 313 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 314
JBRYU 0:0df3300689d2 315 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 316 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 317 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 318 *ptr = 0x00;
JBRYU 0:0df3300689d2 319 ptr++;
JBRYU 0:0df3300689d2 320 }
JBRYU 0:0df3300689d2 321 else
JBRYU 0:0df3300689d2 322 {
JBRYU 0:0df3300689d2 323 *ptr = 0xc0;
JBRYU 0:0df3300689d2 324 ptr++;
JBRYU 0:0df3300689d2 325 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 326 ptr++;
JBRYU 0:0df3300689d2 327 }
JBRYU 0:0df3300689d2 328
JBRYU 0:0df3300689d2 329 ptr_ans = (PTR_ANS*)ptr;
JBRYU 0:0df3300689d2 330
JBRYU 0:0df3300689d2 331 ptr_ans->type = htons(DNS_TYPE_PTR);
JBRYU 0:0df3300689d2 332 ptr_ans->obj = htons(DNS_CLASS_IN);
JBRYU 0:0df3300689d2 333 ptr_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 334 ptr_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 335
JBRYU 0:0df3300689d2 336 int instance_len = SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 337
JBRYU 0:0df3300689d2 338 ptr = (uint8_t*)ptr_ans->name;
JBRYU 0:0df3300689d2 339
JBRYU 0:0df3300689d2 340 if (off_inst == 0)
JBRYU 0:0df3300689d2 341 {
JBRYU 0:0df3300689d2 342 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 343
JBRYU 0:0df3300689d2 344 ptr_ans->len = htons(instance_len + 3);
JBRYU 0:0df3300689d2 345
JBRYU 0:0df3300689d2 346 memcpy(ptr_ans->name,
JBRYU 0:0df3300689d2 347 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 348 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 349
JBRYU 0:0df3300689d2 350 ptr += instance_len + 1;
JBRYU 0:0df3300689d2 351 *ptr = 0xc0;
JBRYU 0:0df3300689d2 352 ptr++;
JBRYU 0:0df3300689d2 353 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 354 ptr++;
JBRYU 0:0df3300689d2 355 }
JBRYU 0:0df3300689d2 356 else
JBRYU 0:0df3300689d2 357 {
JBRYU 0:0df3300689d2 358 ptr_ans->len = htons(2);
JBRYU 0:0df3300689d2 359
JBRYU 0:0df3300689d2 360 *ptr = 0xc0;
JBRYU 0:0df3300689d2 361 ptr++;
JBRYU 0:0df3300689d2 362 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 363 ptr++;
JBRYU 0:0df3300689d2 364 }
JBRYU 0:0df3300689d2 365 break;
JBRYU 0:0df3300689d2 366 case DNS_TYPE_SRV :
JBRYU 0:0df3300689d2 367 ans_mask = ans_mask ^ DNS_TYPE_SRV;
JBRYU 0:0df3300689d2 368 if (off_inst == 0)
JBRYU 0:0df3300689d2 369 {
JBRYU 0:0df3300689d2 370 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 371
JBRYU 0:0df3300689d2 372 memcpy(ptr,
JBRYU 0:0df3300689d2 373 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 374 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 375
JBRYU 0:0df3300689d2 376 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 377
JBRYU 0:0df3300689d2 378 if (off_serv == 0)
JBRYU 0:0df3300689d2 379 {
JBRYU 0:0df3300689d2 380 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 381
JBRYU 0:0df3300689d2 382 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 383 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 384 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 385
JBRYU 0:0df3300689d2 386 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 387 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 388 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 389
JBRYU 0:0df3300689d2 390 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 391 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 392 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 393
JBRYU 0:0df3300689d2 394 *ptr = 0x00;
JBRYU 0:0df3300689d2 395 ptr++;
JBRYU 0:0df3300689d2 396 }
JBRYU 0:0df3300689d2 397 else
JBRYU 0:0df3300689d2 398 {
JBRYU 0:0df3300689d2 399 *ptr = 0xc0;
JBRYU 0:0df3300689d2 400 ptr++;
JBRYU 0:0df3300689d2 401 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 402 ptr++;
JBRYU 0:0df3300689d2 403 }
JBRYU 0:0df3300689d2 404 }
JBRYU 0:0df3300689d2 405 else
JBRYU 0:0df3300689d2 406 {
JBRYU 0:0df3300689d2 407 *ptr = 0xc0;
JBRYU 0:0df3300689d2 408 ptr++;
JBRYU 0:0df3300689d2 409 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 410 ptr++;
JBRYU 0:0df3300689d2 411 }
JBRYU 0:0df3300689d2 412
JBRYU 0:0df3300689d2 413 srv_ans = (SRV_ANS*)(ptr);
JBRYU 0:0df3300689d2 414 srv_ans->type = htons(DNS_TYPE_SRV);
JBRYU 0:0df3300689d2 415 srv_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 416 srv_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 417 srv_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 418 srv_ans->pri = 0;
JBRYU 0:0df3300689d2 419 srv_ans->wei = 0;
JBRYU 0:0df3300689d2 420 srv_ans->port = htons(8080);
JBRYU 0:0df3300689d2 421 ptr = (uint8_t*)srv_ans->name;
JBRYU 0:0df3300689d2 422
JBRYU 0:0df3300689d2 423 if (off_domain == 0)
JBRYU 0:0df3300689d2 424 {
JBRYU 0:0df3300689d2 425 off_domain = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 426
JBRYU 0:0df3300689d2 427 memcpy(ptr,
JBRYU 0:0df3300689d2 428 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 429 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 430
JBRYU 0:0df3300689d2 431 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 432
JBRYU 0:0df3300689d2 433 memcpy(ptr,
JBRYU 0:0df3300689d2 434 &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 435 1 + SD_domains.elements[0].domain_len);
JBRYU 0:0df3300689d2 436
JBRYU 0:0df3300689d2 437 ptr+= 1 + SD_domains.elements[0].domain_len;
JBRYU 0:0df3300689d2 438 *ptr = 0x00;
JBRYU 0:0df3300689d2 439 ptr++;
JBRYU 0:0df3300689d2 440 }
JBRYU 0:0df3300689d2 441 else
JBRYU 0:0df3300689d2 442 {
JBRYU 0:0df3300689d2 443 *ptr = 0xc0;
JBRYU 0:0df3300689d2 444 ptr++;
JBRYU 0:0df3300689d2 445 *ptr = (uint8_t)off_domain;
JBRYU 0:0df3300689d2 446 ptr++;
JBRYU 0:0df3300689d2 447 }
JBRYU 0:0df3300689d2 448 srv_ans->len =
JBRYU 0:0df3300689d2 449 htons((uint16_t)((uint32_t)ptr - (uint32_t)&srv_ans->pri));
JBRYU 0:0df3300689d2 450
JBRYU 0:0df3300689d2 451 break;
JBRYU 0:0df3300689d2 452 case DNS_TYPE_TXT :
JBRYU 0:0df3300689d2 453 ans_mask = ans_mask ^ DNS_TYPE_TXT;
JBRYU 0:0df3300689d2 454 if (off_inst == 0)
JBRYU 0:0df3300689d2 455 {
JBRYU 0:0df3300689d2 456 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 457
JBRYU 0:0df3300689d2 458 memcpy(ptr,
JBRYU 0:0df3300689d2 459 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 460 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 461
JBRYU 0:0df3300689d2 462 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 463
JBRYU 0:0df3300689d2 464 if (off_serv == 0)
JBRYU 0:0df3300689d2 465 {
JBRYU 0:0df3300689d2 466 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 467
JBRYU 0:0df3300689d2 468 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 469 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 470 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 471
JBRYU 0:0df3300689d2 472 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 473 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 474 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 475
JBRYU 0:0df3300689d2 476 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 477 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 478 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 479
JBRYU 0:0df3300689d2 480 *ptr = 0x00;
JBRYU 0:0df3300689d2 481 ptr++;
JBRYU 0:0df3300689d2 482 }
JBRYU 0:0df3300689d2 483 else
JBRYU 0:0df3300689d2 484 {
JBRYU 0:0df3300689d2 485 *ptr = 0xc0;
JBRYU 0:0df3300689d2 486 ptr++;
JBRYU 0:0df3300689d2 487 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 488 ptr++;
JBRYU 0:0df3300689d2 489 }
JBRYU 0:0df3300689d2 490 }
JBRYU 0:0df3300689d2 491 else
JBRYU 0:0df3300689d2 492 {
JBRYU 0:0df3300689d2 493 *ptr = 0xc0;
JBRYU 0:0df3300689d2 494 ptr++;
JBRYU 0:0df3300689d2 495 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 496 ptr++;
JBRYU 0:0df3300689d2 497 }
JBRYU 0:0df3300689d2 498
JBRYU 0:0df3300689d2 499 txt_ans = (TXT_ANS*)(ptr);
JBRYU 0:0df3300689d2 500 txt_ans->type = htons(DNS_TYPE_TXT);
JBRYU 0:0df3300689d2 501 txt_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 502 txt_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 503 txt_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 504 ptr = (uint8_t*)txt_ans->txt;
JBRYU 0:0df3300689d2 505
JBRYU 0:0df3300689d2 506 memcpy(ptr,
JBRYU 0:0df3300689d2 507 &SD_domains.elements[0].txt.len_txtvers,
JBRYU 0:0df3300689d2 508 1 + SD_domains.elements[0].txt.len_txtvers);
JBRYU 0:0df3300689d2 509 ptr += 1 + SD_domains.elements[0].txt.len_txtvers;
JBRYU 0:0df3300689d2 510
JBRYU 0:0df3300689d2 511 memcpy(ptr,
JBRYU 0:0df3300689d2 512 &SD_domains.elements[0].txt.len_dcap,
JBRYU 0:0df3300689d2 513 1 + SD_domains.elements[0].txt.len_dcap);
JBRYU 0:0df3300689d2 514 ptr += 1 + SD_domains.elements[0].txt.len_dcap;
JBRYU 0:0df3300689d2 515
JBRYU 0:0df3300689d2 516 memcpy(ptr,
JBRYU 0:0df3300689d2 517 &SD_domains.elements[0].txt.len_path,
JBRYU 0:0df3300689d2 518 1 + SD_domains.elements[0].txt.len_path);
JBRYU 0:0df3300689d2 519 ptr += 1 + SD_domains.elements[0].txt.len_path;
JBRYU 0:0df3300689d2 520
JBRYU 0:0df3300689d2 521 memcpy(ptr,
JBRYU 0:0df3300689d2 522 &SD_domains.elements[0].txt.len_https,
JBRYU 0:0df3300689d2 523 1 + SD_domains.elements[0].txt.len_https);
JBRYU 0:0df3300689d2 524 ptr += 1 + SD_domains.elements[0].txt.len_https;
JBRYU 0:0df3300689d2 525
JBRYU 0:0df3300689d2 526 memcpy(ptr,
JBRYU 0:0df3300689d2 527 &SD_domains.elements[0].txt.len_level,
JBRYU 0:0df3300689d2 528 1 + SD_domains.elements[0].txt.len_level);
JBRYU 0:0df3300689d2 529 ptr += 1 + SD_domains.elements[0].txt.len_level;
JBRYU 0:0df3300689d2 530
JBRYU 0:0df3300689d2 531 txt_ans->len =
JBRYU 0:0df3300689d2 532 htons((uint16_t)((uint32_t)ptr - (uint32_t)txt_ans->txt));
JBRYU 0:0df3300689d2 533
JBRYU 0:0df3300689d2 534 break;
JBRYU 0:0df3300689d2 535 case DNS_TYPE_A :
JBRYU 0:0df3300689d2 536 ans_mask = ans_mask ^ DNS_TYPE_A;
JBRYU 0:0df3300689d2 537 if (off_domain == 0)
JBRYU 0:0df3300689d2 538 {
JBRYU 0:0df3300689d2 539 off_domain = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 540
JBRYU 0:0df3300689d2 541 memcpy(ptr,
JBRYU 0:0df3300689d2 542 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 543 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 544
JBRYU 0:0df3300689d2 545 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 546
JBRYU 0:0df3300689d2 547 memcpy(ptr,
JBRYU 0:0df3300689d2 548 &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 549 1 + SD_domains.elements[0].domain_len);
JBRYU 0:0df3300689d2 550
JBRYU 0:0df3300689d2 551 ptr += 1 + SD_domains.elements[0].domain_len;
JBRYU 0:0df3300689d2 552 *ptr = 0x00;
JBRYU 0:0df3300689d2 553 ptr++;
JBRYU 0:0df3300689d2 554 }
JBRYU 0:0df3300689d2 555 else
JBRYU 0:0df3300689d2 556 {
JBRYU 0:0df3300689d2 557 *ptr = 0xc0;
JBRYU 0:0df3300689d2 558 ptr++;
JBRYU 0:0df3300689d2 559 *ptr = (uint8_t)off_domain;
JBRYU 0:0df3300689d2 560 ptr++;
JBRYU 0:0df3300689d2 561 }
JBRYU 0:0df3300689d2 562
JBRYU 0:0df3300689d2 563 A_ans = (struct dns_answer*)(ptr);
JBRYU 0:0df3300689d2 564
JBRYU 0:0df3300689d2 565 A_ans->type = htons(DNS_TYPE_A);
JBRYU 0:0df3300689d2 566 A_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 567 A_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 568 A_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 569 A_ans->len = htons(4);
JBRYU 0:0df3300689d2 570 memcpy((uint8_t*)A_ans->ipaddr,
JBRYU 0:0df3300689d2 571 IP_byte, 4);
JBRYU 0:0df3300689d2 572
JBRYU 0:0df3300689d2 573 ptr = (uint8_t*)&A_ans->ipaddr + 4;
JBRYU 0:0df3300689d2 574 break;
JBRYU 0:0df3300689d2 575
JBRYU 0:0df3300689d2 576 default :
JBRYU 0:0df3300689d2 577 break;
JBRYU 0:0df3300689d2 578 }
JBRYU 0:0df3300689d2 579 i++;
JBRYU 0:0df3300689d2 580 }
JBRYU 0:0df3300689d2 581
JBRYU 0:0df3300689d2 582 int send_len = ptr - (uint8_t*)hdr;
JBRYU 0:0df3300689d2 583
JBRYU 0:0df3300689d2 584 mdns_sock.sendTo(send_endpt, (char*)hdr, send_len);
JBRYU 0:0df3300689d2 585 }
JBRYU 0:0df3300689d2 586
JBRYU 0:0df3300689d2 587 void mDNSResponder::
JBRYU 0:0df3300689d2 588 MDNS_process(void const *args)
JBRYU 0:0df3300689d2 589 {
JBRYU 0:0df3300689d2 590 char rcv_buf[ 1500 ];
JBRYU 0:0df3300689d2 591 uint8_t nquestions, nanswers;
JBRYU 0:0df3300689d2 592 struct dns_hdr* hdr;
JBRYU 0:0df3300689d2 593 char *queryptr;
JBRYU 0:0df3300689d2 594 uint8_t is_request;
JBRYU 0:0df3300689d2 595 int len;
JBRYU 0:0df3300689d2 596
JBRYU 0:0df3300689d2 597 MDBG("MDNS Process\n");
JBRYU 0:0df3300689d2 598
JBRYU 0:0df3300689d2 599 while ((len = mdns_sock.receiveFrom(rcv_endpt,
JBRYU 0:0df3300689d2 600 rcv_buf, sizeof(rcv_buf))) != 0)
JBRYU 0:0df3300689d2 601 {
JBRYU 0:0df3300689d2 602 hdr = (struct dns_hdr *)rcv_buf;
JBRYU 0:0df3300689d2 603 queryptr = (char *)hdr + sizeof(*hdr);
JBRYU 0:0df3300689d2 604 is_request = ((hdr->flags1 & ~1) == 0) && (hdr->flags2 == 0);
JBRYU 0:0df3300689d2 605 nquestions = (uint8_t) ntohs(hdr->numquestions);
JBRYU 0:0df3300689d2 606 nanswers = (uint8_t) ntohs(hdr->numanswers);
JBRYU 0:0df3300689d2 607
JBRYU 0:0df3300689d2 608 MDBG("resolver: flags1=0x%02X flags2=0x%02X nquestions=%d,\
JBRYU 0:0df3300689d2 609 nanswers=%d, nauthrr=%d, nextrarr=%d\n",\
JBRYU 0:0df3300689d2 610 hdr->flags1, hdr->flags2, (uint8_t) nquestions, (uint8_t) nanswers,\
JBRYU 0:0df3300689d2 611 (uint8_t) ntohs(hdr->numauthrr),\
JBRYU 0:0df3300689d2 612 (uint8_t) ntohs(hdr->numextrarr));
JBRYU 0:0df3300689d2 613
JBRYU 0:0df3300689d2 614 if(hdr->id != 0)
JBRYU 0:0df3300689d2 615 {
JBRYU 0:0df3300689d2 616 return;
JBRYU 0:0df3300689d2 617 }
JBRYU 0:0df3300689d2 618
JBRYU 0:0df3300689d2 619 /** ANSWER HANDLING SECTION ************************************************/
JBRYU 0:0df3300689d2 620 struct dns_question* question = (struct dns_question *)skip_name(queryptr);
JBRYU 0:0df3300689d2 621
JBRYU 0:0df3300689d2 622 uint16_t type;
JBRYU 0:0df3300689d2 623
JBRYU 0:0df3300689d2 624 if (is_request)
JBRYU 0:0df3300689d2 625 {
JBRYU 0:0df3300689d2 626 char* name;
JBRYU 0:0df3300689d2 627
JBRYU 0:0df3300689d2 628 memset(&g_queries, 0, sizeof(QR_MAP));
JBRYU 0:0df3300689d2 629
JBRYU 0:0df3300689d2 630 while (nquestions--)
JBRYU 0:0df3300689d2 631 {
JBRYU 0:0df3300689d2 632 type = ntohs(question->type);
JBRYU 0:0df3300689d2 633 name = decode_name(queryptr, (char*)hdr);
JBRYU 0:0df3300689d2 634
JBRYU 0:0df3300689d2 635 if ((type & DNS_TYPE_PTR) == DNS_TYPE_PTR)
JBRYU 0:0df3300689d2 636 {
JBRYU 0:0df3300689d2 637 if (strncmp((const char*)name,
JBRYU 0:0df3300689d2 638 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 639 SD_domains.elements[0].serv_len + 1) == 0)
JBRYU 0:0df3300689d2 640 {
JBRYU 0:0df3300689d2 641 MDBG("recv PTR request\n");
JBRYU 0:0df3300689d2 642 g_queries.reqs[g_queries.numbers] = DNS_TYPE_PTR;
JBRYU 0:0df3300689d2 643 g_queries.numbers++;
JBRYU 0:0df3300689d2 644 }
JBRYU 0:0df3300689d2 645 }
JBRYU 0:0df3300689d2 646
JBRYU 0:0df3300689d2 647 if ((type & DNS_TYPE_SRV) == DNS_TYPE_SRV)
JBRYU 0:0df3300689d2 648 {
JBRYU 0:0df3300689d2 649 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 650 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 651 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 652 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 653 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 654 SD_domains.elements[0].serv_len+1) == 0))
JBRYU 0:0df3300689d2 655 {
JBRYU 0:0df3300689d2 656 MDBG("recv SRV request\n");
JBRYU 0:0df3300689d2 657 g_queries.reqs[g_queries.numbers] = DNS_TYPE_SRV;
JBRYU 0:0df3300689d2 658 g_queries.numbers++;
JBRYU 0:0df3300689d2 659 }
JBRYU 0:0df3300689d2 660 }
JBRYU 0:0df3300689d2 661
JBRYU 0:0df3300689d2 662 if ((type & DNS_TYPE_TXT) == DNS_TYPE_TXT)
JBRYU 0:0df3300689d2 663 {
JBRYU 0:0df3300689d2 664 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 665 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 666 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 667 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 668 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 669 SD_domains.elements[0].serv_len+1) == 0))
JBRYU 0:0df3300689d2 670 {
JBRYU 0:0df3300689d2 671 MDBG("recv TXT request\n");
JBRYU 0:0df3300689d2 672 g_queries.reqs[g_queries.numbers] = DNS_TYPE_TXT;
JBRYU 0:0df3300689d2 673 g_queries.numbers++;
JBRYU 0:0df3300689d2 674 }
JBRYU 0:0df3300689d2 675 }
JBRYU 0:0df3300689d2 676
JBRYU 0:0df3300689d2 677 if ((type & DNS_TYPE_A) == DNS_TYPE_A)
JBRYU 0:0df3300689d2 678 {
JBRYU 0:0df3300689d2 679 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 680 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 681 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 682 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 683 (const char*)&SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 684 SD_domains.elements[0].domain_len+1) == 0))
JBRYU 0:0df3300689d2 685 {
JBRYU 0:0df3300689d2 686 MDBG("recv AAAA request\n");
JBRYU 0:0df3300689d2 687 g_queries.reqs[g_queries.numbers] = DNS_TYPE_A;
JBRYU 0:0df3300689d2 688 g_queries.numbers++;
JBRYU 0:0df3300689d2 689 }
JBRYU 0:0df3300689d2 690 }
JBRYU 0:0df3300689d2 691
JBRYU 0:0df3300689d2 692 queryptr = (char*)question + sizeof(struct dns_question);
JBRYU 0:0df3300689d2 693 question = (struct dns_question *)skip_name(queryptr);
JBRYU 0:0df3300689d2 694 }
JBRYU 0:0df3300689d2 695
JBRYU 0:0df3300689d2 696 if (g_queries.numbers)
JBRYU 0:0df3300689d2 697 send_dns_ans(hdr);
JBRYU 0:0df3300689d2 698 }
JBRYU 0:0df3300689d2 699 else
JBRYU 0:0df3300689d2 700 {
JBRYU 0:0df3300689d2 701 if (strncmp((const char*)queryptr,
JBRYU 0:0df3300689d2 702 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 703 SD_domains.elements[0].inst_len + 1) == 0)
JBRYU 0:0df3300689d2 704 {
JBRYU 0:0df3300689d2 705 type = ntohs(question->type);
JBRYU 0:0df3300689d2 706 if (type == DNS_TYPE_A || type == DNS_TYPE_A)
JBRYU 0:0df3300689d2 707 {
JBRYU 0:0df3300689d2 708 char instance_number[4];
JBRYU 0:0df3300689d2 709 sprintf(instance_number, "%.2d%.2X",
JBRYU 0:0df3300689d2 710 (uint8_t)(rand()%100),
JBRYU 0:0df3300689d2 711 IP_byte[3]);
JBRYU 0:0df3300689d2 712 register_service(instance_number);
JBRYU 0:0df3300689d2 713 query_domain();
JBRYU 0:0df3300689d2 714 }
JBRYU 0:0df3300689d2 715 }
JBRYU 0:0df3300689d2 716 }
JBRYU 0:0df3300689d2 717
JBRYU 0:0df3300689d2 718 }
JBRYU 0:0df3300689d2 719 }
JBRYU 0:0df3300689d2 720 #endif
JBRYU 0:0df3300689d2 721