Copy IE unicast channel function from WS info instead of FHSS configu… (#2310)

* Copy IE unicast channel function from WS info instead of FHSS configuration

* Added comment

Author: Jarkko Paso

source/6LoWPAN/ws/ws_bootstrap.c

@@ -412,7 +412,8 @@ static void ws_bootstrap_llc_hopping_update(struct protocol_interface_info_entry
     memcpy(cur->ws_info->hopping_schdule.channel_mask, fhss_configuration->channel_mask, sizeof(uint32_t) * 8);
     cur->ws_info->hopping_schdule.uc_fixed_channel = fhss_configuration->unicast_fixed_channel;
     cur->ws_info->hopping_schdule.bc_fixed_channel = fhss_configuration->broadcast_fixed_channel;
-    cur->ws_info->hopping_schdule.uc_channel_function = fhss_configuration->ws_uc_channel_function;
+    // Read UC channel function from WS info because FHSS might be temporarily configured to fixed channel during discovery.
+    cur->ws_info->hopping_schdule.uc_channel_function = cur->ws_info->fhss_uc_channel_function;
     cur->ws_info->hopping_schdule.bc_channel_function = fhss_configuration->ws_bc_channel_function;
     cur->ws_info->hopping_schdule.fhss_bc_dwell_interval = fhss_configuration->fhss_bc_dwell_interval;
     cur->ws_info->hopping_schdule.fhss_broadcast_interval = fhss_configuration->fhss_broadcast_interval;