Xuyi Wang / mDNS

mDNS

Dependents:   OS

This is a mDNS server.

mDNSResponder.cpp@3:25a82eb200c7, 2015-08-14 (annotated)

Committer:
JBRYU
Date:
Fri Aug 14 12:31:10 2015 +0000
Revision:
3:25a82eb200c7
Parent:
2:2b00b659497a
Child:
4:47d30d199ce0
mDNS-SD

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 3:25a82eb200c7 7 now - mdns-sd on MBED-LWIP-ipv4
JBRYU 0:0df3300689d2 8 ----------------------------------------------------
JBRYU 0:0df3300689d2 9 More progressed things than others :
JBRYU 0:0df3300689d2 10 {
JBRYU 2:2b00b659497a 11 Parsing multi-records (OK),
JBRYU 0:0df3300689d2 12 Check duplicated host and avoid (OK)
JBRYU 0:0df3300689d2 13 }
JBRYU 0:0df3300689d2 14
JBRYU 0:0df3300689d2 15 TODO : (Actully these are not necessary for my prj)
JBRYU 0:0df3300689d2 16 {
JBRYU 0:0df3300689d2 17 register multiple service,
JBRYU 0:0df3300689d2 18 managing records-caches
JBRYU 0:0df3300689d2 19 }
JBRYU 0:0df3300689d2 20 ----------------------------------------------------
JBRYU 0:0df3300689d2 21 Notes :
JBRYU 0:0df3300689d2 22 srv-instance-name = host-name
JBRYU 2:2b00b659497a 23 SEP-<rand 2hex><IP 2hex>
JBRYU 0:0df3300689d2 24 ----------------------------------------------------
JBRYU 0:0df3300689d2 25 */
JBRYU 0:0df3300689d2 26
JBRYU 0:0df3300689d2 27
JBRYU 0:0df3300689d2 28 #include "lwip/opt.h"
JBRYU 0:0df3300689d2 29 #include "mbed.h"
JBRYU 0:0df3300689d2 30 #include "EthernetInterface.h"
JBRYU 0:0df3300689d2 31 #include <cstring>
JBRYU 0:0df3300689d2 32 #if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
JBRYU 0:0df3300689d2 33
JBRYU 0:0df3300689d2 34 #include "mDNSResponder.h"
JBRYU 0:0df3300689d2 35 #include "dns-sd.h"
JBRYU 0:0df3300689d2 36
JBRYU 0:0df3300689d2 37 #define MDNS_DBG 1
JBRYU 0:0df3300689d2 38 #if (MDNS_DBG > 0)
JBRYU 0:0df3300689d2 39 #define MDBG(x...) printf(x)
JBRYU 0:0df3300689d2 40 #else
JBRYU 0:0df3300689d2 41 #define MDBG(x...)
JBRYU 0:0df3300689d2 42 #endif
JBRYU 0:0df3300689d2 43
JBRYU 0:0df3300689d2 44 mDNSResponder::mDNSResponder() : IP_str(NULL)
JBRYU 0:0df3300689d2 45 {}
JBRYU 0:0df3300689d2 46
JBRYU 0:0df3300689d2 47 /* initialize static instance */
JBRYU 0:0df3300689d2 48 char mDNSResponder::query_buf[1500] =
JBRYU 0:0df3300689d2 49 {
JBRYU 0:0df3300689d2 50 0,
JBRYU 0:0df3300689d2 51 };
JBRYU 0:0df3300689d2 52
JBRYU 0:0df3300689d2 53 MY_SD_DOMAINS mDNSResponder::SD_domains =
JBRYU 0:0df3300689d2 54 {
JBRYU 0:0df3300689d2 55 .numbers = N_CONTIKI_SERVICES,
JBRYU 0:0df3300689d2 56 .elements =
JBRYU 0:0df3300689d2 57 {
JBRYU 0:0df3300689d2 58 {
JBRYU 0:0df3300689d2 59 .inst_len = 8,
JBRYU 0:0df3300689d2 60 .instance = {'S','E','P','-','0','0','0','0'},
JBRYU 0:0df3300689d2 61 .serv_len = 12,
JBRYU 0:0df3300689d2 62 .service = {'_','s','m','a','r','t','e','n','e','r','g','y',},
JBRYU 0:0df3300689d2 63 .trl_len = 4,
JBRYU 0:0df3300689d2 64 .trl = {'_','t','c','p'},
JBRYU 0:0df3300689d2 65 .domain_len = 5,
JBRYU 0:0df3300689d2 66 .domain = {'l','o','c','a','l'},
JBRYU 0:0df3300689d2 67 .txt =
JBRYU 0:0df3300689d2 68 {
JBRYU 0:0df3300689d2 69 .len_txtvers = 9,
JBRYU 0:0df3300689d2 70 .txtvers = {'t','x','t','v','e','r','s','=','1'},
JBRYU 0:0df3300689d2 71 .len_dcap = 10,
JBRYU 0:0df3300689d2 72 .dcap = {'d','c','a','p','=','/','d','c','a','p'},
JBRYU 0:0df3300689d2 73 .len_path = 9,
JBRYU 0:0df3300689d2 74 .path = {'p','a','t','h','=','/','u','p','t'},
JBRYU 0:0df3300689d2 75 .len_https = 9,
JBRYU 0:0df3300689d2 76 .https = {'h','t','t','p','s','=','4','4','3'},
JBRYU 0:0df3300689d2 77 .len_level = 9,
JBRYU 0:0df3300689d2 78 .level = {'l','e','v','e','l','=','-','S','0'},
JBRYU 0:0df3300689d2 79 }
JBRYU 0:0df3300689d2 80 },
JBRYU 0:0df3300689d2 81 },
JBRYU 0:0df3300689d2 82 };
JBRYU 0:0df3300689d2 83
JBRYU 0:0df3300689d2 84 struct dns_hdr mDNSResponder::SD_res_hdr =
JBRYU 0:0df3300689d2 85 {
JBRYU 0:0df3300689d2 86 .id = 0x0000,
JBRYU 0:0df3300689d2 87 .flags1 = DNS_FLAG1_RESPONSE | DNS_FLAG1_AUTHORATIVE,
JBRYU 0:0df3300689d2 88 .flags2 = 0,
JBRYU 0:0df3300689d2 89 .numquestions = 0,
JBRYU 0:0df3300689d2 90 .numanswers = htons(1),
JBRYU 0:0df3300689d2 91 .numauthrr = 0,
JBRYU 0:0df3300689d2 92 .numextrarr = 0,
JBRYU 0:0df3300689d2 93 };
JBRYU 0:0df3300689d2 94
JBRYU 0:0df3300689d2 95 QR_MAP mDNSResponder::g_queries = {0,};
JBRYU 0:0df3300689d2 96
JBRYU 0:0df3300689d2 97 /* end of initialize static instance */
JBRYU 0:0df3300689d2 98
JBRYU 0:0df3300689d2 99 mDNSResponder::~mDNSResponder()
JBRYU 0:0df3300689d2 100 {
JBRYU 0:0df3300689d2 101 close();
JBRYU 0:0df3300689d2 102 }
JBRYU 0:0df3300689d2 103
JBRYU 0:0df3300689d2 104 void mDNSResponder::
JBRYU 0:0df3300689d2 105 register_service(char* number)
JBRYU 0:0df3300689d2 106 {
JBRYU 0:0df3300689d2 107 memcpy(&SD_domains.elements[0].instance[4], number, 4);
JBRYU 0:0df3300689d2 108 }
JBRYU 0:0df3300689d2 109
JBRYU 0:0df3300689d2 110 void mDNSResponder::
JBRYU 0:0df3300689d2 111 query_domain(void)
JBRYU 0:0df3300689d2 112 {
JBRYU 0:0df3300689d2 113 volatile uint8_t i;
JBRYU 0:0df3300689d2 114 struct dns_hdr* hdr;
JBRYU 0:0df3300689d2 115 struct dns_question* question;
JBRYU 0:0df3300689d2 116 uint8_t *query;
JBRYU 0:0df3300689d2 117
JBRYU 0:0df3300689d2 118 MDBG("start probe duplicate domain\n");
JBRYU 0:0df3300689d2 119
JBRYU 0:0df3300689d2 120 hdr = (struct dns_hdr *)query_buf;
JBRYU 0:0df3300689d2 121
JBRYU 0:0df3300689d2 122 memset(hdr, 0, sizeof(struct dns_hdr));
JBRYU 0:0df3300689d2 123
JBRYU 0:0df3300689d2 124 hdr->id = 0;
JBRYU 0:0df3300689d2 125 hdr->flags1 = DNS_FLAG1_RD;
JBRYU 0:0df3300689d2 126 hdr->numquestions = htons(1);
JBRYU 0:0df3300689d2 127
JBRYU 0:0df3300689d2 128 query = (unsigned char *)query_buf + sizeof(*hdr);
JBRYU 0:0df3300689d2 129
JBRYU 0:0df3300689d2 130 memcpy(query, &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 131 SD_domains.elements[0].inst_len+1);
JBRYU 0:0df3300689d2 132 query += SD_domains.elements[0].inst_len+1;
JBRYU 0:0df3300689d2 133
JBRYU 0:0df3300689d2 134 memcpy(query, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 135 SD_domains.elements[0].domain_len+1);
JBRYU 0:0df3300689d2 136 query += SD_domains.elements[0].domain_len+1;
JBRYU 0:0df3300689d2 137
JBRYU 0:0df3300689d2 138 *query = 0x00;
JBRYU 0:0df3300689d2 139 query++;
JBRYU 0:0df3300689d2 140
JBRYU 0:0df3300689d2 141 question = (struct dns_question*)query;
JBRYU 0:0df3300689d2 142 question->type = htons(DNS_TYPE_ANY);
JBRYU 0:0df3300689d2 143 question->obj = htons(DNS_CLASS_IN);
JBRYU 0:0df3300689d2 144
JBRYU 0:0df3300689d2 145 query += 4;
JBRYU 0:0df3300689d2 146
JBRYU 0:0df3300689d2 147 MDBG("send probe query(%d)\n",
JBRYU 0:0df3300689d2 148 (uint16_t)((uint32_t)query - (uint32_t)query_buf));
JBRYU 0:0df3300689d2 149
JBRYU 0:0df3300689d2 150 mdns_sock.sendTo(send_endpt, query_buf,
JBRYU 0:0df3300689d2 151 (query - (uint8_t *) query_buf));
JBRYU 0:0df3300689d2 152 }
JBRYU 0:0df3300689d2 153
JBRYU 0:0df3300689d2 154 void mDNSResponder::announce(char* ip)
JBRYU 0:0df3300689d2 155 {
JBRYU 0:0df3300689d2 156 send_endpt.set_address(MCAST, MDNS_PORT);
JBRYU 0:0df3300689d2 157
JBRYU 0:0df3300689d2 158 mdns_sock.bind(MDNS_PORT);
JBRYU 0:0df3300689d2 159 if (mdns_sock.join_multicast_group(MCAST) != 0)
JBRYU 0:0df3300689d2 160 {
JBRYU 0:0df3300689d2 161 printf("Error joining the multicast group\n");
JBRYU 0:0df3300689d2 162 while (true) {}
JBRYU 0:0df3300689d2 163 }
JBRYU 0:0df3300689d2 164
JBRYU 0:0df3300689d2 165 IP_str = ip;
JBRYU 0:0df3300689d2 166
JBRYU 0:0df3300689d2 167 IPstringToByte(IP_str);
JBRYU 0:0df3300689d2 168
JBRYU 0:0df3300689d2 169 char instance_number[4];
JBRYU 3:25a82eb200c7 170 sprintf(instance_number, "%.2X%.2X",
JBRYU 0:0df3300689d2 171 0, IP_byte[3]);
JBRYU 0:0df3300689d2 172 register_service(instance_number);
JBRYU 0:0df3300689d2 173
JBRYU 0:0df3300689d2 174 query_domain();
JBRYU 0:0df3300689d2 175 }
JBRYU 0:0df3300689d2 176
JBRYU 0:0df3300689d2 177 void mDNSResponder::close()
JBRYU 0:0df3300689d2 178 {
JBRYU 0:0df3300689d2 179 mdns_sock.close();
JBRYU 0:0df3300689d2 180 }
JBRYU 0:0df3300689d2 181
JBRYU 0:0df3300689d2 182 void mDNSResponder::IPstringToByte(char* IPstr)
JBRYU 0:0df3300689d2 183 {
JBRYU 0:0df3300689d2 184 char ip1[4] = {0,}; char ip2[4] = {0,};
JBRYU 0:0df3300689d2 185 char ip3[4] = {0,}; char ip4[4] = {0,};
JBRYU 0:0df3300689d2 186 char* p;
JBRYU 0:0df3300689d2 187 char* p_dot;
JBRYU 0:0df3300689d2 188
JBRYU 0:0df3300689d2 189 p_dot = strstr(IPstr, ".");
JBRYU 0:0df3300689d2 190 memcpy(ip1, IPstr, p_dot-IPstr);
JBRYU 0:0df3300689d2 191 IP_byte[0] = (uint8_t)atoi((const char*)ip1);
JBRYU 0:0df3300689d2 192
JBRYU 0:0df3300689d2 193 p = p_dot + 1;
JBRYU 0:0df3300689d2 194 p_dot = strstr(p, ".");
JBRYU 0:0df3300689d2 195 memcpy(ip2, p, p_dot-p);
JBRYU 0:0df3300689d2 196 IP_byte[1] = (uint8_t)atoi((const char*)ip2);
JBRYU 0:0df3300689d2 197
JBRYU 0:0df3300689d2 198 p = p_dot + 1;
JBRYU 0:0df3300689d2 199 p_dot = strstr(p, ".");
JBRYU 0:0df3300689d2 200 memcpy(ip3, p, p_dot-p);
JBRYU 0:0df3300689d2 201 IP_byte[2] = (uint8_t)atoi((const char*)ip3);
JBRYU 0:0df3300689d2 202
JBRYU 0:0df3300689d2 203 p = p_dot + 1;
JBRYU 0:0df3300689d2 204 memcpy(ip4, p, 3);
JBRYU 0:0df3300689d2 205 IP_byte[3] = (uint8_t)atoi((const char*)ip4);
JBRYU 0:0df3300689d2 206 }
JBRYU 0:0df3300689d2 207
JBRYU 0:0df3300689d2 208 char* mDNSResponder::
JBRYU 0:0df3300689d2 209 skip_name(char* query)
JBRYU 0:0df3300689d2 210 {
JBRYU 0:0df3300689d2 211 unsigned char n;
JBRYU 0:0df3300689d2 212
JBRYU 0:0df3300689d2 213 do
JBRYU 0:0df3300689d2 214 {
JBRYU 0:0df3300689d2 215 n = *query;
JBRYU 0:0df3300689d2 216 if(n & 0xc0)
JBRYU 0:0df3300689d2 217 {
JBRYU 0:0df3300689d2 218 ++query;
JBRYU 0:0df3300689d2 219 break;
JBRYU 0:0df3300689d2 220 }
JBRYU 0:0df3300689d2 221
JBRYU 0:0df3300689d2 222 ++query;
JBRYU 0:0df3300689d2 223
JBRYU 0:0df3300689d2 224 while(n > 0)
JBRYU 0:0df3300689d2 225 {
JBRYU 0:0df3300689d2 226 ++query;
JBRYU 0:0df3300689d2 227 --n;
JBRYU 0:0df3300689d2 228 };
JBRYU 0:0df3300689d2 229 } while(*query != 0);
JBRYU 0:0df3300689d2 230
JBRYU 0:0df3300689d2 231 return query + 1;
JBRYU 0:0df3300689d2 232 }
JBRYU 0:0df3300689d2 233
JBRYU 0:0df3300689d2 234 char* mDNSResponder::
JBRYU 0:0df3300689d2 235 decode_name(char* query, char* packet)
JBRYU 0:0df3300689d2 236 {
JBRYU 0:0df3300689d2 237 char c = 0xff;
JBRYU 0:0df3300689d2 238 static char dest[MAX_DOMAIN_LEN];
JBRYU 0:0df3300689d2 239 int len = 0;
JBRYU 0:0df3300689d2 240
JBRYU 0:0df3300689d2 241 memset(dest, 0, MAX_DOMAIN_LEN);
JBRYU 0:0df3300689d2 242
JBRYU 0:0df3300689d2 243 MDBG("\n");
JBRYU 0:0df3300689d2 244 while((len < MAX_DOMAIN_LEN) && (c != 0x00))
JBRYU 0:0df3300689d2 245 {
JBRYU 0:0df3300689d2 246 c = *query;
JBRYU 0:0df3300689d2 247
JBRYU 0:0df3300689d2 248 while (c == 0xc0)
JBRYU 0:0df3300689d2 249 {
JBRYU 0:0df3300689d2 250 MDBG("%s : read offset\n", __FUNCTION__);
JBRYU 0:0df3300689d2 251 query++;
JBRYU 0:0df3300689d2 252 query = (char*)((uint32_t)packet + *query);
JBRYU 0:0df3300689d2 253 c = *query;
JBRYU 0:0df3300689d2 254 }
JBRYU 0:0df3300689d2 255
JBRYU 0:0df3300689d2 256 memset(&dest[len], c, 1);
JBRYU 0:0df3300689d2 257
JBRYU 0:0df3300689d2 258 query++;
JBRYU 0:0df3300689d2 259 len++;
JBRYU 0:0df3300689d2 260 }
JBRYU 0:0df3300689d2 261
JBRYU 0:0df3300689d2 262 MDBG("\n%s : %s\n", __FUNCTION__, dest);
JBRYU 0:0df3300689d2 263 return dest;
JBRYU 0:0df3300689d2 264 }
JBRYU 0:0df3300689d2 265
JBRYU 0:0df3300689d2 266 void mDNSResponder::
JBRYU 0:0df3300689d2 267 send_dns_ans(struct dns_hdr* hdr)
JBRYU 0:0df3300689d2 268 {
JBRYU 0:0df3300689d2 269 int i = 0;
JBRYU 0:0df3300689d2 270 uint8_t* ptr;
JBRYU 0:0df3300689d2 271 uint32_t off_inst = 0;
JBRYU 0:0df3300689d2 272 uint32_t off_serv = 0;
JBRYU 0:0df3300689d2 273 uint32_t off_domain = 0;
JBRYU 0:0df3300689d2 274 PTR_ANS* ptr_ans;
JBRYU 0:0df3300689d2 275 SRV_ANS* srv_ans;
JBRYU 0:0df3300689d2 276 struct dns_answer* A_ans;
JBRYU 0:0df3300689d2 277 TXT_ANS* txt_ans;
JBRYU 0:0df3300689d2 278 int numbers = g_queries.numbers;
JBRYU 0:0df3300689d2 279
JBRYU 0:0df3300689d2 280 uint8_t ans_mask = DNS_TYPE_ANY; //later, for addtional ans
JBRYU 0:0df3300689d2 281
JBRYU 0:0df3300689d2 282 memcpy(hdr, &SD_res_hdr, sizeof(struct dns_hdr));
JBRYU 0:0df3300689d2 283 hdr->numanswers = htons(numbers);
JBRYU 0:0df3300689d2 284 ptr = (uint8_t*)hdr + sizeof(struct dns_hdr);
JBRYU 0:0df3300689d2 285
JBRYU 0:0df3300689d2 286 while (numbers--)
JBRYU 0:0df3300689d2 287 {
JBRYU 0:0df3300689d2 288 switch (g_queries.reqs[i])
JBRYU 0:0df3300689d2 289 {
JBRYU 0:0df3300689d2 290 case DNS_TYPE_PTR :
JBRYU 0:0df3300689d2 291 ans_mask = ans_mask ^ DNS_TYPE_PTR;
JBRYU 0:0df3300689d2 292 if (off_serv == 0)
JBRYU 0:0df3300689d2 293 {
JBRYU 0:0df3300689d2 294 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 295
JBRYU 0:0df3300689d2 296 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 297 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 298 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 299
JBRYU 0:0df3300689d2 300 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 301 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 302 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 303
JBRYU 0:0df3300689d2 304 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 305 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 306 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 307 *ptr = 0x00;
JBRYU 0:0df3300689d2 308 ptr++;
JBRYU 0:0df3300689d2 309 }
JBRYU 0:0df3300689d2 310 else
JBRYU 0:0df3300689d2 311 {
JBRYU 0:0df3300689d2 312 *ptr = 0xc0;
JBRYU 0:0df3300689d2 313 ptr++;
JBRYU 0:0df3300689d2 314 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 315 ptr++;
JBRYU 0:0df3300689d2 316 }
JBRYU 0:0df3300689d2 317
JBRYU 0:0df3300689d2 318 ptr_ans = (PTR_ANS*)ptr;
JBRYU 0:0df3300689d2 319
JBRYU 0:0df3300689d2 320 ptr_ans->type = htons(DNS_TYPE_PTR);
JBRYU 0:0df3300689d2 321 ptr_ans->obj = htons(DNS_CLASS_IN);
JBRYU 0:0df3300689d2 322 ptr_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 323 ptr_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 324
JBRYU 0:0df3300689d2 325 int instance_len = SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 326
JBRYU 0:0df3300689d2 327 ptr = (uint8_t*)ptr_ans->name;
JBRYU 0:0df3300689d2 328
JBRYU 0:0df3300689d2 329 if (off_inst == 0)
JBRYU 0:0df3300689d2 330 {
JBRYU 0:0df3300689d2 331 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 332
JBRYU 0:0df3300689d2 333 ptr_ans->len = htons(instance_len + 3);
JBRYU 0:0df3300689d2 334
JBRYU 0:0df3300689d2 335 memcpy(ptr_ans->name,
JBRYU 0:0df3300689d2 336 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 337 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 338
JBRYU 0:0df3300689d2 339 ptr += instance_len + 1;
JBRYU 0:0df3300689d2 340 *ptr = 0xc0;
JBRYU 0:0df3300689d2 341 ptr++;
JBRYU 0:0df3300689d2 342 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 343 ptr++;
JBRYU 0:0df3300689d2 344 }
JBRYU 0:0df3300689d2 345 else
JBRYU 0:0df3300689d2 346 {
JBRYU 0:0df3300689d2 347 ptr_ans->len = htons(2);
JBRYU 0:0df3300689d2 348
JBRYU 0:0df3300689d2 349 *ptr = 0xc0;
JBRYU 0:0df3300689d2 350 ptr++;
JBRYU 0:0df3300689d2 351 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 352 ptr++;
JBRYU 0:0df3300689d2 353 }
JBRYU 0:0df3300689d2 354 break;
JBRYU 0:0df3300689d2 355 case DNS_TYPE_SRV :
JBRYU 0:0df3300689d2 356 ans_mask = ans_mask ^ DNS_TYPE_SRV;
JBRYU 0:0df3300689d2 357 if (off_inst == 0)
JBRYU 0:0df3300689d2 358 {
JBRYU 0:0df3300689d2 359 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 360
JBRYU 0:0df3300689d2 361 memcpy(ptr,
JBRYU 0:0df3300689d2 362 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 363 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 364
JBRYU 0:0df3300689d2 365 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 366
JBRYU 0:0df3300689d2 367 if (off_serv == 0)
JBRYU 0:0df3300689d2 368 {
JBRYU 0:0df3300689d2 369 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 370
JBRYU 0:0df3300689d2 371 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 372 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 373 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 374
JBRYU 0:0df3300689d2 375 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 376 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 377 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 378
JBRYU 0:0df3300689d2 379 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 380 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 381 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 382
JBRYU 0:0df3300689d2 383 *ptr = 0x00;
JBRYU 0:0df3300689d2 384 ptr++;
JBRYU 0:0df3300689d2 385 }
JBRYU 0:0df3300689d2 386 else
JBRYU 0:0df3300689d2 387 {
JBRYU 0:0df3300689d2 388 *ptr = 0xc0;
JBRYU 0:0df3300689d2 389 ptr++;
JBRYU 0:0df3300689d2 390 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 391 ptr++;
JBRYU 0:0df3300689d2 392 }
JBRYU 0:0df3300689d2 393 }
JBRYU 0:0df3300689d2 394 else
JBRYU 0:0df3300689d2 395 {
JBRYU 0:0df3300689d2 396 *ptr = 0xc0;
JBRYU 0:0df3300689d2 397 ptr++;
JBRYU 0:0df3300689d2 398 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 399 ptr++;
JBRYU 0:0df3300689d2 400 }
JBRYU 0:0df3300689d2 401
JBRYU 0:0df3300689d2 402 srv_ans = (SRV_ANS*)(ptr);
JBRYU 0:0df3300689d2 403 srv_ans->type = htons(DNS_TYPE_SRV);
JBRYU 0:0df3300689d2 404 srv_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 405 srv_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 406 srv_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 407 srv_ans->pri = 0;
JBRYU 0:0df3300689d2 408 srv_ans->wei = 0;
JBRYU 0:0df3300689d2 409 srv_ans->port = htons(8080);
JBRYU 0:0df3300689d2 410 ptr = (uint8_t*)srv_ans->name;
JBRYU 0:0df3300689d2 411
JBRYU 0:0df3300689d2 412 if (off_domain == 0)
JBRYU 0:0df3300689d2 413 {
JBRYU 0:0df3300689d2 414 off_domain = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 415
JBRYU 0:0df3300689d2 416 memcpy(ptr,
JBRYU 0:0df3300689d2 417 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 418 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 419
JBRYU 0:0df3300689d2 420 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 421
JBRYU 0:0df3300689d2 422 memcpy(ptr,
JBRYU 0:0df3300689d2 423 &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 424 1 + SD_domains.elements[0].domain_len);
JBRYU 0:0df3300689d2 425
JBRYU 0:0df3300689d2 426 ptr+= 1 + SD_domains.elements[0].domain_len;
JBRYU 0:0df3300689d2 427 *ptr = 0x00;
JBRYU 0:0df3300689d2 428 ptr++;
JBRYU 0:0df3300689d2 429 }
JBRYU 0:0df3300689d2 430 else
JBRYU 0:0df3300689d2 431 {
JBRYU 0:0df3300689d2 432 *ptr = 0xc0;
JBRYU 0:0df3300689d2 433 ptr++;
JBRYU 0:0df3300689d2 434 *ptr = (uint8_t)off_domain;
JBRYU 0:0df3300689d2 435 ptr++;
JBRYU 0:0df3300689d2 436 }
JBRYU 0:0df3300689d2 437 srv_ans->len =
JBRYU 0:0df3300689d2 438 htons((uint16_t)((uint32_t)ptr - (uint32_t)&srv_ans->pri));
JBRYU 0:0df3300689d2 439
JBRYU 0:0df3300689d2 440 break;
JBRYU 0:0df3300689d2 441 case DNS_TYPE_TXT :
JBRYU 0:0df3300689d2 442 ans_mask = ans_mask ^ DNS_TYPE_TXT;
JBRYU 0:0df3300689d2 443 if (off_inst == 0)
JBRYU 0:0df3300689d2 444 {
JBRYU 0:0df3300689d2 445 off_inst = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 446
JBRYU 0:0df3300689d2 447 memcpy(ptr,
JBRYU 0:0df3300689d2 448 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 449 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 450
JBRYU 0:0df3300689d2 451 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 452
JBRYU 0:0df3300689d2 453 if (off_serv == 0)
JBRYU 0:0df3300689d2 454 {
JBRYU 0:0df3300689d2 455 off_serv = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 456
JBRYU 0:0df3300689d2 457 memcpy(ptr, &SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 458 SD_domains.elements[0].serv_len + 1);
JBRYU 0:0df3300689d2 459 ptr += SD_domains.elements[0].serv_len + 1;
JBRYU 0:0df3300689d2 460
JBRYU 0:0df3300689d2 461 memcpy(ptr, &SD_domains.elements[0].trl_len,
JBRYU 0:0df3300689d2 462 SD_domains.elements[0].trl_len + 1);
JBRYU 0:0df3300689d2 463 ptr += SD_domains.elements[0].trl_len + 1;
JBRYU 0:0df3300689d2 464
JBRYU 0:0df3300689d2 465 memcpy(ptr, &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 466 SD_domains.elements[0].domain_len + 1);
JBRYU 0:0df3300689d2 467 ptr += SD_domains.elements[0].domain_len + 1;
JBRYU 0:0df3300689d2 468
JBRYU 0:0df3300689d2 469 *ptr = 0x00;
JBRYU 0:0df3300689d2 470 ptr++;
JBRYU 0:0df3300689d2 471 }
JBRYU 0:0df3300689d2 472 else
JBRYU 0:0df3300689d2 473 {
JBRYU 0:0df3300689d2 474 *ptr = 0xc0;
JBRYU 0:0df3300689d2 475 ptr++;
JBRYU 0:0df3300689d2 476 *ptr = (uint8_t)off_serv;
JBRYU 0:0df3300689d2 477 ptr++;
JBRYU 0:0df3300689d2 478 }
JBRYU 0:0df3300689d2 479 }
JBRYU 0:0df3300689d2 480 else
JBRYU 0:0df3300689d2 481 {
JBRYU 0:0df3300689d2 482 *ptr = 0xc0;
JBRYU 0:0df3300689d2 483 ptr++;
JBRYU 0:0df3300689d2 484 *ptr = (uint8_t)off_inst;
JBRYU 0:0df3300689d2 485 ptr++;
JBRYU 0:0df3300689d2 486 }
JBRYU 0:0df3300689d2 487
JBRYU 0:0df3300689d2 488 txt_ans = (TXT_ANS*)(ptr);
JBRYU 0:0df3300689d2 489 txt_ans->type = htons(DNS_TYPE_TXT);
JBRYU 0:0df3300689d2 490 txt_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 491 txt_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 492 txt_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 493 ptr = (uint8_t*)txt_ans->txt;
JBRYU 0:0df3300689d2 494
JBRYU 0:0df3300689d2 495 memcpy(ptr,
JBRYU 0:0df3300689d2 496 &SD_domains.elements[0].txt.len_txtvers,
JBRYU 0:0df3300689d2 497 1 + SD_domains.elements[0].txt.len_txtvers);
JBRYU 0:0df3300689d2 498 ptr += 1 + SD_domains.elements[0].txt.len_txtvers;
JBRYU 0:0df3300689d2 499
JBRYU 0:0df3300689d2 500 memcpy(ptr,
JBRYU 0:0df3300689d2 501 &SD_domains.elements[0].txt.len_dcap,
JBRYU 0:0df3300689d2 502 1 + SD_domains.elements[0].txt.len_dcap);
JBRYU 0:0df3300689d2 503 ptr += 1 + SD_domains.elements[0].txt.len_dcap;
JBRYU 0:0df3300689d2 504
JBRYU 0:0df3300689d2 505 memcpy(ptr,
JBRYU 0:0df3300689d2 506 &SD_domains.elements[0].txt.len_path,
JBRYU 0:0df3300689d2 507 1 + SD_domains.elements[0].txt.len_path);
JBRYU 0:0df3300689d2 508 ptr += 1 + SD_domains.elements[0].txt.len_path;
JBRYU 0:0df3300689d2 509
JBRYU 0:0df3300689d2 510 memcpy(ptr,
JBRYU 0:0df3300689d2 511 &SD_domains.elements[0].txt.len_https,
JBRYU 0:0df3300689d2 512 1 + SD_domains.elements[0].txt.len_https);
JBRYU 0:0df3300689d2 513 ptr += 1 + SD_domains.elements[0].txt.len_https;
JBRYU 0:0df3300689d2 514
JBRYU 0:0df3300689d2 515 memcpy(ptr,
JBRYU 0:0df3300689d2 516 &SD_domains.elements[0].txt.len_level,
JBRYU 0:0df3300689d2 517 1 + SD_domains.elements[0].txt.len_level);
JBRYU 0:0df3300689d2 518 ptr += 1 + SD_domains.elements[0].txt.len_level;
JBRYU 0:0df3300689d2 519
JBRYU 0:0df3300689d2 520 txt_ans->len =
JBRYU 0:0df3300689d2 521 htons((uint16_t)((uint32_t)ptr - (uint32_t)txt_ans->txt));
JBRYU 0:0df3300689d2 522
JBRYU 0:0df3300689d2 523 break;
JBRYU 0:0df3300689d2 524 case DNS_TYPE_A :
JBRYU 0:0df3300689d2 525 ans_mask = ans_mask ^ DNS_TYPE_A;
JBRYU 0:0df3300689d2 526 if (off_domain == 0)
JBRYU 0:0df3300689d2 527 {
JBRYU 0:0df3300689d2 528 off_domain = (uint32_t)ptr - (uint32_t)hdr;
JBRYU 0:0df3300689d2 529
JBRYU 0:0df3300689d2 530 memcpy(ptr,
JBRYU 0:0df3300689d2 531 &SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 532 1 + SD_domains.elements[0].inst_len);
JBRYU 0:0df3300689d2 533
JBRYU 0:0df3300689d2 534 ptr += 1 + SD_domains.elements[0].inst_len;
JBRYU 0:0df3300689d2 535
JBRYU 0:0df3300689d2 536 memcpy(ptr,
JBRYU 0:0df3300689d2 537 &SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 538 1 + SD_domains.elements[0].domain_len);
JBRYU 0:0df3300689d2 539
JBRYU 0:0df3300689d2 540 ptr += 1 + SD_domains.elements[0].domain_len;
JBRYU 0:0df3300689d2 541 *ptr = 0x00;
JBRYU 0:0df3300689d2 542 ptr++;
JBRYU 0:0df3300689d2 543 }
JBRYU 0:0df3300689d2 544 else
JBRYU 0:0df3300689d2 545 {
JBRYU 0:0df3300689d2 546 *ptr = 0xc0;
JBRYU 0:0df3300689d2 547 ptr++;
JBRYU 0:0df3300689d2 548 *ptr = (uint8_t)off_domain;
JBRYU 0:0df3300689d2 549 ptr++;
JBRYU 0:0df3300689d2 550 }
JBRYU 0:0df3300689d2 551
JBRYU 0:0df3300689d2 552 A_ans = (struct dns_answer*)(ptr);
JBRYU 0:0df3300689d2 553
JBRYU 0:0df3300689d2 554 A_ans->type = htons(DNS_TYPE_A);
JBRYU 0:0df3300689d2 555 A_ans->obj = htons(DNS_CLASS_IN | DNS_CASH_FLUSH);
JBRYU 0:0df3300689d2 556 A_ans->ttl[0] = 0;
JBRYU 0:0df3300689d2 557 A_ans->ttl[1] = htons(120);
JBRYU 0:0df3300689d2 558 A_ans->len = htons(4);
JBRYU 0:0df3300689d2 559 memcpy((uint8_t*)A_ans->ipaddr,
JBRYU 0:0df3300689d2 560 IP_byte, 4);
JBRYU 0:0df3300689d2 561
JBRYU 0:0df3300689d2 562 ptr = (uint8_t*)&A_ans->ipaddr + 4;
JBRYU 0:0df3300689d2 563 break;
JBRYU 0:0df3300689d2 564
JBRYU 0:0df3300689d2 565 default :
JBRYU 0:0df3300689d2 566 break;
JBRYU 0:0df3300689d2 567 }
JBRYU 0:0df3300689d2 568 i++;
JBRYU 0:0df3300689d2 569 }
JBRYU 0:0df3300689d2 570
JBRYU 0:0df3300689d2 571 int send_len = ptr - (uint8_t*)hdr;
JBRYU 0:0df3300689d2 572
JBRYU 0:0df3300689d2 573 mdns_sock.sendTo(send_endpt, (char*)hdr, send_len);
JBRYU 0:0df3300689d2 574 }
JBRYU 0:0df3300689d2 575
JBRYU 0:0df3300689d2 576 void mDNSResponder::
JBRYU 0:0df3300689d2 577 MDNS_process(void const *args)
JBRYU 0:0df3300689d2 578 {
JBRYU 0:0df3300689d2 579 char rcv_buf[ 1500 ];
JBRYU 0:0df3300689d2 580 uint8_t nquestions, nanswers;
JBRYU 0:0df3300689d2 581 struct dns_hdr* hdr;
JBRYU 0:0df3300689d2 582 char *queryptr;
JBRYU 0:0df3300689d2 583 uint8_t is_request;
JBRYU 0:0df3300689d2 584 int len;
JBRYU 0:0df3300689d2 585
JBRYU 0:0df3300689d2 586 MDBG("MDNS Process\n");
JBRYU 0:0df3300689d2 587
JBRYU 0:0df3300689d2 588 while ((len = mdns_sock.receiveFrom(rcv_endpt,
JBRYU 0:0df3300689d2 589 rcv_buf, sizeof(rcv_buf))) != 0)
JBRYU 0:0df3300689d2 590 {
JBRYU 0:0df3300689d2 591 hdr = (struct dns_hdr *)rcv_buf;
JBRYU 0:0df3300689d2 592 queryptr = (char *)hdr + sizeof(*hdr);
JBRYU 0:0df3300689d2 593 is_request = ((hdr->flags1 & ~1) == 0) && (hdr->flags2 == 0);
JBRYU 0:0df3300689d2 594 nquestions = (uint8_t) ntohs(hdr->numquestions);
JBRYU 0:0df3300689d2 595 nanswers = (uint8_t) ntohs(hdr->numanswers);
JBRYU 0:0df3300689d2 596
JBRYU 0:0df3300689d2 597 MDBG("resolver: flags1=0x%02X flags2=0x%02X nquestions=%d,\
JBRYU 0:0df3300689d2 598 nanswers=%d, nauthrr=%d, nextrarr=%d\n",\
JBRYU 0:0df3300689d2 599 hdr->flags1, hdr->flags2, (uint8_t) nquestions, (uint8_t) nanswers,\
JBRYU 0:0df3300689d2 600 (uint8_t) ntohs(hdr->numauthrr),\
JBRYU 0:0df3300689d2 601 (uint8_t) ntohs(hdr->numextrarr));
JBRYU 0:0df3300689d2 602
JBRYU 0:0df3300689d2 603 if(hdr->id != 0)
JBRYU 0:0df3300689d2 604 {
JBRYU 0:0df3300689d2 605 return;
JBRYU 0:0df3300689d2 606 }
JBRYU 0:0df3300689d2 607
JBRYU 0:0df3300689d2 608 /** ANSWER HANDLING SECTION ************************************************/
JBRYU 0:0df3300689d2 609 struct dns_question* question = (struct dns_question *)skip_name(queryptr);
JBRYU 0:0df3300689d2 610
JBRYU 0:0df3300689d2 611 uint16_t type;
JBRYU 0:0df3300689d2 612
JBRYU 0:0df3300689d2 613 if (is_request)
JBRYU 0:0df3300689d2 614 {
JBRYU 0:0df3300689d2 615 char* name;
JBRYU 0:0df3300689d2 616
JBRYU 0:0df3300689d2 617 memset(&g_queries, 0, sizeof(QR_MAP));
JBRYU 0:0df3300689d2 618
JBRYU 0:0df3300689d2 619 while (nquestions--)
JBRYU 0:0df3300689d2 620 {
JBRYU 0:0df3300689d2 621 type = ntohs(question->type);
JBRYU 0:0df3300689d2 622 name = decode_name(queryptr, (char*)hdr);
JBRYU 0:0df3300689d2 623
JBRYU 0:0df3300689d2 624 if ((type & DNS_TYPE_PTR) == DNS_TYPE_PTR)
JBRYU 0:0df3300689d2 625 {
JBRYU 0:0df3300689d2 626 if (strncmp((const char*)name,
JBRYU 0:0df3300689d2 627 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 628 SD_domains.elements[0].serv_len + 1) == 0)
JBRYU 0:0df3300689d2 629 {
JBRYU 0:0df3300689d2 630 MDBG("recv PTR request\n");
JBRYU 0:0df3300689d2 631 g_queries.reqs[g_queries.numbers] = DNS_TYPE_PTR;
JBRYU 0:0df3300689d2 632 g_queries.numbers++;
JBRYU 0:0df3300689d2 633 }
JBRYU 0:0df3300689d2 634 }
JBRYU 0:0df3300689d2 635
JBRYU 0:0df3300689d2 636 if ((type & DNS_TYPE_SRV) == DNS_TYPE_SRV)
JBRYU 0:0df3300689d2 637 {
JBRYU 0:0df3300689d2 638 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 639 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 640 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 641 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 642 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 643 SD_domains.elements[0].serv_len+1) == 0))
JBRYU 0:0df3300689d2 644 {
JBRYU 0:0df3300689d2 645 MDBG("recv SRV request\n");
JBRYU 0:0df3300689d2 646 g_queries.reqs[g_queries.numbers] = DNS_TYPE_SRV;
JBRYU 0:0df3300689d2 647 g_queries.numbers++;
JBRYU 0:0df3300689d2 648 }
JBRYU 0:0df3300689d2 649 }
JBRYU 0:0df3300689d2 650
JBRYU 0:0df3300689d2 651 if ((type & DNS_TYPE_TXT) == DNS_TYPE_TXT)
JBRYU 0:0df3300689d2 652 {
JBRYU 0:0df3300689d2 653 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 654 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 655 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 656 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 657 (const char*)&SD_domains.elements[0].serv_len,
JBRYU 0:0df3300689d2 658 SD_domains.elements[0].serv_len+1) == 0))
JBRYU 0:0df3300689d2 659 {
JBRYU 0:0df3300689d2 660 MDBG("recv TXT request\n");
JBRYU 0:0df3300689d2 661 g_queries.reqs[g_queries.numbers] = DNS_TYPE_TXT;
JBRYU 0:0df3300689d2 662 g_queries.numbers++;
JBRYU 0:0df3300689d2 663 }
JBRYU 0:0df3300689d2 664 }
JBRYU 0:0df3300689d2 665
JBRYU 0:0df3300689d2 666 if ((type & DNS_TYPE_A) == DNS_TYPE_A)
JBRYU 0:0df3300689d2 667 {
JBRYU 0:0df3300689d2 668 if ((strncmp((const char*)name,
JBRYU 0:0df3300689d2 669 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 670 SD_domains.elements[0].inst_len + 1) == 0) &&
JBRYU 0:0df3300689d2 671 (strncmp((const char*)(name + SD_domains.elements[0].inst_len+1),
JBRYU 0:0df3300689d2 672 (const char*)&SD_domains.elements[0].domain_len,
JBRYU 0:0df3300689d2 673 SD_domains.elements[0].domain_len+1) == 0))
JBRYU 0:0df3300689d2 674 {
JBRYU 0:0df3300689d2 675 MDBG("recv AAAA request\n");
JBRYU 0:0df3300689d2 676 g_queries.reqs[g_queries.numbers] = DNS_TYPE_A;
JBRYU 0:0df3300689d2 677 g_queries.numbers++;
JBRYU 0:0df3300689d2 678 }
JBRYU 0:0df3300689d2 679 }
JBRYU 0:0df3300689d2 680
JBRYU 0:0df3300689d2 681 queryptr = (char*)question + sizeof(struct dns_question);
JBRYU 0:0df3300689d2 682 question = (struct dns_question *)skip_name(queryptr);
JBRYU 0:0df3300689d2 683 }
JBRYU 0:0df3300689d2 684
JBRYU 0:0df3300689d2 685 if (g_queries.numbers)
JBRYU 0:0df3300689d2 686 send_dns_ans(hdr);
JBRYU 0:0df3300689d2 687 }
JBRYU 0:0df3300689d2 688 else
JBRYU 0:0df3300689d2 689 {
JBRYU 0:0df3300689d2 690 if (strncmp((const char*)queryptr,
JBRYU 0:0df3300689d2 691 (const char*)&SD_domains.elements[0].inst_len,
JBRYU 0:0df3300689d2 692 SD_domains.elements[0].inst_len + 1) == 0)
JBRYU 0:0df3300689d2 693 {
JBRYU 0:0df3300689d2 694 type = ntohs(question->type);
JBRYU 0:0df3300689d2 695 if (type == DNS_TYPE_A || type == DNS_TYPE_A)
JBRYU 0:0df3300689d2 696 {
JBRYU 0:0df3300689d2 697 char instance_number[4];
JBRYU 3:25a82eb200c7 698 sprintf(instance_number, "%.2X%.2X",
JBRYU 3:25a82eb200c7 699 (uint8_t)(rand()%256),
JBRYU 0:0df3300689d2 700 IP_byte[3]);
JBRYU 0:0df3300689d2 701 register_service(instance_number);
JBRYU 0:0df3300689d2 702 query_domain();
JBRYU 0:0df3300689d2 703 }
JBRYU 0:0df3300689d2 704 }
JBRYU 0:0df3300689d2 705 }
JBRYU 0:0df3300689d2 706
JBRYU 0:0df3300689d2 707 }
JBRYU 0:0df3300689d2 708 }
JBRYU 0:0df3300689d2 709 #endif
JBRYU 0:0df3300689d2 710