From e5ddab3e1d81059f8ace8fddcd4482e089ce56ef Mon Sep 17 00:00:00 2001
From: Roman Khassraf <roman@khassraf.at>
Date: Sun, 4 Dec 2016 16:19:40 +0100
Subject: #240: Implemented block for extraction of information from cipher
 mode command messages

---
 grc/gsm_block_tree.xml             |  1 +
 grc/misc_utils/CMakeLists.txt      |  1 +
 grc/misc_utils/gsm_extract_cmc.xml | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+)
 create mode 100755 grc/misc_utils/gsm_extract_cmc.xml

(limited to 'grc')

diff --git a/grc/gsm_block_tree.xml b/grc/gsm_block_tree.xml
index f9ff1ff..ff13a87 100644
--- a/grc/gsm_block_tree.xml
+++ b/grc/gsm_block_tree.xml
@@ -58,6 +58,7 @@
       <block>gsm_message_file_source</block>
       <block>gsm_extract_system_info</block>
       <block>gsm_extract_immediate_assignment</block>
+      <block>gsm_extract_cmc</block>
       <block>gsm_controlled_rotator_cc</block>
       <block>gsm_controlled_fractional_resampler_cc</block>
       <block>gsm_message_printer</block>
diff --git a/grc/misc_utils/CMakeLists.txt b/grc/misc_utils/CMakeLists.txt
index 7bdf894..7bd9c6d 100644
--- a/grc/misc_utils/CMakeLists.txt
+++ b/grc/misc_utils/CMakeLists.txt
@@ -20,6 +20,7 @@
 install(FILES
     gsm_extract_system_info.xml
     gsm_extract_immediate_assignment.xml
+    gsm_extract_cmc.xml
     gsm_controlled_rotator_cc.xml
     gsm_message_printer.xml
     gsm_bursts_printer.xml
diff --git a/grc/misc_utils/gsm_extract_cmc.xml b/grc/misc_utils/gsm_extract_cmc.xml
new file mode 100755
index 0000000..66a6408
--- /dev/null
+++ b/grc/misc_utils/gsm_extract_cmc.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<block>
+  <name>Extract Cipher Mode Command</name>
+  <key>gsm_extract_cmc</key>
+  <import>import grgsm</import>
+  <make>grgsm.extract_cmc()</make>
+  <sink>
+    <name>msgs</name>
+    <type>message</type>
+  </sink>
+  <doc>
+Extracts the framenumber and the assigned encryption algorithm from Cipher Mode Commands.
+
+Input: decoded control channel messages
+
+The information can be retrieved using following functions:
+get_frame_numbers(), get_a5_versions()
+
+</doc>
+</block>
-- 
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