ServiceRegistration/srp.c

   1 /* srp.c
   2  *
   3  * Service Registration Protocol Client
   4  *
   5  * Discover the service registration domain
   6  * Construct a DNS update
   7  * Include:
   8  *  Service Name: PTR Record
   9  *  Service Instance Name: SRV record
  10  *  Hostname: A, AAAA, KEY records
  11  * Sign with key using SIG(0)
  12  */
  13
  14 int
  15 main(int argc, char *argv)
  16 {
  17     char *host_name = "thread-demo";
  18     char *service_type "_printer._tcp";
  19     char *a_record = "127.0.0.1";
  20     char *aaaa_Record = "::1";
  21     int prKeyLen = 0;
  22     int puKeyLen = 0;
  23     uint8_t *prKey = NULL;
  24     uint8_t *puKey = NULL;
  25     dns_message_t *update;
  26     dns_name_t *hostname;
  27     dns_name_t *service_name;
  28     dns_name_t *service_instance_name;
  29     dns_wire_t message;
  30
  31     message.id = srp_random16();
  32     message.bitfield = 0;
  33     dns_qr_set(message, dns_qr_query);
  34     dns_opcode_set(message, dns_opcode_update);
  35     message.qdcount = message.ancount = message.nscount = message.arcount = 0;
  36
  37     update = dns_message_create();
  38     tld = dns_make_fqdn(update, "services.arpa");
  39     dns_update_initialize(update, tld, "2001:1::3");
  40     hostname = dns_make_fqdn(update, service_name, "services.arpa.");
  41     service_name = dns_make_fqdn(message, service_type, "services.arpa.");
  42     service_instance_name = dns_make_fqdn(message, service_name, service_name);
  43
  44     // _printer._tcp.services.arpa IN PTR thread-demo._printer._tcp.services.arpa
  45     // thread-demo._printer._tcp.services.arpa IN SRV 0 0 80 thread-demo.services.arpa
  46     // thread-demo.services.arpa IN A    127.0.0.1
  47     //                           IN AAAA ::1
  48     //                           IN KEY ojwefoijweojfwoeijfoiwejfoiwejfoiejf
  49
  50     dns_update_add(update, hostname, dns_make_a_rr(a_record));
  51     dns_update_add(update, hostname, dns_make_a_rr(aaaa_record));
  52     dns_update_add(update, service_instance_name, dns_make_srv_rr(0, 0, 80, hostname));
  53     dns_update_add(update, service_name, dns_make_ptr_rr(service_instance_name));
  54     dns_update_add(update, service_name, dns_make_key_rr(puKey, puKeyLen));
  55     dns_message_to_wire(update);
  56     dns_message_sign(update, prKey, prKeyLen, puKey, puKeyLen);
  57     dns_message_send(update);
  58     dns_message_await_response(update);
  59
  60     // Get the service name and type
  61     // Get the hostname
  62     // Get the key
  63     // Discover the registration domain (not for Thread)
  64     // Discover the SRP server (not for Thread)
  65     // Generate the update
  66     // Sign the update
  67     // Send the update
  68 }
  69
  70 // Local Variables:
  71 // mode: C
  72 // tab-width: 4
  73 // c-file-style: "bsd"
  74 // c-basic-offset: 4
  75 // fill-column: 108
  76 // indent-tabs-mode: nil
  77 // End: