From e571e96518aaedbbb858c6c2b0ad536ea62722c6 Mon Sep 17 00:00:00 2001
From: Roman Khassraf <roman@khassraf.at>
Date: Sun, 12 Apr 2015 15:35:41 +0200
Subject: Added subslot assignment to frames, which enables filtering by
 subslot in e.g. wireshark

---
 .../universal_ctrl_chans_demapper_impl.cc          | 45 ++++++++++++++++++++++
 lib/demapping/universal_ctrl_chans_demapper_impl.h |  1 +
 2 files changed, 46 insertions(+)

(limited to 'lib/demapping')

diff --git a/lib/demapping/universal_ctrl_chans_demapper_impl.cc b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
index 403167f..c9e461a 100644
--- a/lib/demapping/universal_ctrl_chans_demapper_impl.cc
+++ b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
@@ -55,6 +55,8 @@ namespace gr {
         {
             d_starts_fn_mod51[ii]=0;
             d_channel_types[ii]=0;
+	    d_subslots[ii] = 0;
+	    d_subslots[ii+51] = 0;
         }
         
         std::vector<int>::const_iterator s;
@@ -78,6 +80,48 @@ namespace gr {
             }
         }
         
+        std::set<int> distinct_channels(channel_types.begin(), channel_types.end());
+	std::set<int>::iterator it;
+        unsigned int subslot;
+	
+	for (it=distinct_channels.begin(); it != distinct_channels.end(); it++)
+	{
+	    subslot = 0;
+	    for(s=starts_fn_mod51.begin();s != starts_fn_mod51.end(); s++)
+	    {
+		if ((d_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4)))
+		{
+		    for(int ii=0; ii<4; ii++)
+		    {
+			d_subslots[*s+ii] = subslot;
+			d_subslots[*s+ii+51] = subslot;
+		    }
+		    subslot++;
+		}
+	    }
+	    
+	    if (*it == GSMTAP_CHANNEL_ACCH or 
+		*it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH) or
+		*it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH4) or
+		*it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_SDCCH8) or
+		*it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_F) or
+		*it == (GSMTAP_CHANNEL_ACCH|GSMTAP_CHANNEL_TCH_H)
+	    )
+	    {
+		for(s=starts_fn_mod51.begin();s != starts_fn_mod51.end(); s++)
+		{
+		    if ((d_channel_types[*s] == *it) and (*s >= 0) and (*s <= (51-4)))
+		    {
+			for(int ii=0; ii<4; ii++)
+			{
+			    d_subslots[*s+ii+51] = subslot;
+			}
+			subslot++;
+		    }
+		}
+	    }
+	}
+        
         
         message_port_register_in(pmt::mp("bursts"));
         set_msg_handler(pmt::mp("bursts"), boost::bind(&universal_ctrl_chans_demapper_impl::filter_ctrl_chans, this, _1));
@@ -104,6 +148,7 @@ namespace gr {
         
         if(header->timeslot==d_timeslot){
 	    header->sub_type = ch_type;
+	    header->sub_slot = d_subslots[fn_mod51 + (51 * (frame_nr % 2))];
 	    
             if(fn_mod51>=fn51_start && fn_mod51<=fn51_stop)
             {
diff --git a/lib/demapping/universal_ctrl_chans_demapper_impl.h b/lib/demapping/universal_ctrl_chans_demapper_impl.h
index aade90d..67e917e 100644
--- a/lib/demapping/universal_ctrl_chans_demapper_impl.h
+++ b/lib/demapping/universal_ctrl_chans_demapper_impl.h
@@ -33,6 +33,7 @@ namespace gr {
      private:
       unsigned int d_starts_fn_mod51[51];
       unsigned int d_channel_types[51];
+      unsigned int d_subslots[102];
       unsigned int d_timeslot;
       uint32_t d_frame_numbers[4];
       pmt::pmt_t d_bursts[4];
-- 
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