Adding DNS config options

srsepc/hdr/mme/s1ap_common.h

@@ -90,6 +90,7 @@ typedef struct{
   uint16_t      mnc;        // BCD-coded with 0xF filler
   std::string   mme_bind_addr;
   std::string   mme_name;
+  std::string   dns_addr;
 } s1ap_args_t;
 
 typedef struct{

srsepc/src/main.cc

@@ -52,7 +52,6 @@ typedef struct {
   int           spgw_hex_limit;
   std::string   hss_level;
   int           hss_hex_limit;
-
   std::string   all_level;
   int           all_hex_limit;
   std::string   filename;
@@ -83,6 +82,7 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
   string mme_bind_addr;
   string spgw_bind_addr;
   string sgi_if_addr;
+  string dns_addr;
   string hss_db_file;
   string hss_auth_algo;
   string log_filename;
@@ -105,6 +105,7 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
     ("mme.mcc",             bpo::value<string>(&mcc)->default_value("001"),                          "Mobile Country Code")
     ("mme.mnc",             bpo::value<string>(&mnc)->default_value("01"),                           "Mobile Network Code")
     ("mme.mme_bind_addr",   bpo::value<string>(&mme_bind_addr)->default_value("127.0.0.1"),"IP address of MME for S1 connnection")
+    ("mme.dns_addr",        bpo::value<string>(&dns_addr)->default_value("8.8.8.8"),"IP address of the DNS server for the UEs")
     ("hss.db_file",         bpo::value<string>(&hss_db_file)->default_value("ue_db.csv"),".csv file that stores UE's keys")
     ("hss.auth_algo",       bpo::value<string>(&hss_auth_algo)->default_value("milenage"),"HSS uthentication algorithm.")
     ("spgw.gtpu_bind_addr", bpo::value<string>(&spgw_bind_addr)->default_value("127.0.0.1"),"IP address of SP-GW for the S1-U connection")
@@ -205,6 +206,7 @@ parse_args(all_args_t *args, int argc, char* argv[]) {
 
   args->mme_args.s1ap_args.mme_bind_addr = mme_bind_addr;
   args->mme_args.s1ap_args.mme_name = mme_name;
+  args->mme_args.s1ap_args.dns_addr = dns_addr;
   args->spgw_args.gtpu_bind_addr = spgw_bind_addr;
   args->spgw_args.sgi_if_addr = sgi_if_addr;
   args->hss_args.db_file = hss_db_file;

srsepc/src/mme/s1ap_nas_transport.cc

@@ -650,7 +650,7 @@ s1ap_nas_transport::handle_nas_service_request(uint32_t m_tmsi,
       //Delete eNB context and connect.
       m_s1ap_log->console("Service Request -- User has ECM context already\n");
       m_s1ap_log->info("Service Request -- User has ECM context already\n");
-      m_s1ap->m_s1ap_ctx_mngmt_proc->send_ue_context_release_command(ecm_ctx,reply_buffer);
+      //m_s1ap->m_s1ap_ctx_mngmt_proc->send_ue_context_release_command(ecm_ctx,reply_buffer);
       int default_bearer_id = 5;
       m_s1ap->m_s1ap_ctx_mngmt_proc->send_initial_context_setup_request(ue_emm_ctx, ecm_ctx, &ecm_ctx->erabs_ctx[default_bearer_id],false);
     }
@@ -1622,10 +1622,15 @@ s1ap_nas_transport::pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *u
   act_def_eps_bearer_context_req.protocol_cnfg_opts.N_opts = 1;
   act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].id = 0x0d;
   act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].len = 4;
-  act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[0] = 8;
-  act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[1] = 8;
-  act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[2] = 8;
-  act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[3] = 8;
+
+  struct sockaddr_in dns_addr;
+  inet_pton(AF_INET, m_s1ap->m_s1ap_args.dns_addr.c_str(), &(dns_addr.sin_addr));
+
+  memcpy(act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents,&dns_addr.sin_addr.s_addr, 4);
+  //act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[0] = 8;
+  //act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[1] = 8;
+  //act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[2] = 8;
+  //act_def_eps_bearer_context_req.protocol_cnfg_opts.opt[0].contents[3] = 8;
 
   //Make sure all unused options are set to false
   act_def_eps_bearer_context_req.negotiated_qos_present = false;