pdcp: fix issue when setting SN length configuration

lib/src/upper/pdcp.cc

@@ -146,7 +146,11 @@ void pdcp::add_bearer(uint32_t lcid, srslte_pdcp_config_t cfg)
       goto unlock_and_exit;
     }
     pdcp_array.at(lcid)->init(rlc, rrc, gw, pdcp_log, lcid, cfg);
-    pdcp_log->info("Added bearer %s\n", rrc->get_rb_name(lcid).c_str());
+    pdcp_log->info("Add %s (lcid=%d, bearer_id=%d, sn_len=%dbits)\n",
+                   rrc->get_rb_name(lcid).c_str(),
+                   lcid,
+                   cfg.bearer_id,
+                   cfg.sn_len);
   } else {
     pdcp_log->warning("Bearer %s already configured. Reconfiguration not supported\n", rrc->get_rb_name(lcid).c_str());
   }
@@ -163,7 +167,11 @@ void pdcp::add_bearer_mrb(uint32_t lcid, srslte_pdcp_config_t cfg)
       goto unlock_and_exit;
     }
     pdcp_array_mrb.at(lcid)->init(rlc, rrc, gw, pdcp_log, lcid, cfg);
-    pdcp_log->info("Added bearer %s\n", rrc->get_rb_name(lcid).c_str());
+    pdcp_log->info("Add %s (lcid=%d, bearer_id=%d, sn_len=%dbits)\n",
+                   rrc->get_rb_name(lcid).c_str(),
+                   lcid,
+                   cfg.bearer_id,
+                   cfg.sn_len);
   } else {
     pdcp_log->warning("Bearer %s already configured. Reconfiguration not supported\n", rrc->get_rb_name(lcid).c_str());
   }

lib/src/upper/pdcp_entity.cc

@@ -67,23 +67,15 @@ void pdcp_entity::init(srsue::rlc_interface_pdcp      *rlc_,
   do_integrity  = false;
   do_encryption = false;
 
-  cfg.sn_len    = 0;
+  cfg = cfg_;
-  sn_len_bytes  = 0;
-
-  if (cfg.is_control) {
-    cfg.sn_len   = 5;
-    sn_len_bytes = 1;
-  }
-  if (cfg.is_data) {
-    cfg.sn_len   = 12;
-    sn_len_bytes = 2;
-  }
 
-  log->info("Init %s with bearer ID: %d\n", rrc->get_rb_name(lcid).c_str(), cfg.bearer_id);
+  // set length of SN field in bytes
+  sn_len_bytes = (cfg.sn_len == 5) ? 1 : 2;
 }
 
 // Reestablishment procedure: 36.323 5.2
-void pdcp_entity::reestablish() {
+void pdcp_entity::reestablish()
+{
   // For SRBs
   if (cfg.is_control) {
     tx_count = 0;

srsue/src/stack/rrc/rrc.cc

@@ -2980,7 +2980,6 @@ void rrc::add_srb(srb_to_add_mod_s* srb_cnfg)
 
 void rrc::add_drb(drb_to_add_mod_s* drb_cnfg)
 {
-
   if (!drb_cnfg->pdcp_cfg_present || !drb_cnfg->rlc_cfg_present || !drb_cnfg->lc_ch_cfg_present) {
     rrc_log->error("Cannot add DRB - incomplete configuration\n");
     return;
@@ -2994,7 +2993,7 @@ void rrc::add_drb(drb_to_add_mod_s* drb_cnfg)
   }
 
   // Setup PDCP
-  srslte_pdcp_config_t pdcp_cfg;
+  srslte_pdcp_config_t pdcp_cfg = {};
   pdcp_cfg.is_data = true;
   pdcp_cfg.bearer_id = drb_cnfg->drb_id;
   if (drb_cnfg->pdcp_cfg.rlc_um_present) {