Minimal version of the LTE downgrade analyzer

This also renames the lte_parser crate to telcom_parser, since it'll
handle any 2G or 3G parsing going forward.

telcom-parser/specs/PC5-RRC-Definitions.asn

@@ -0,0 +1,45 @@
+-- This file was generated by the Objective Systems ASN1C Compiler
+-- (http://www.obj-sys.com).  Version: 7.7.2, Date: 13-Oct-2023.
+
+PC5-RRC-Definitions DEFINITIONS AUTOMATIC TAGS ::= BEGIN
+
+IMPORTS
+
+TDD-ConfigSL-r12
+FROM EUTRA-RRC-Definitions ;
+
+-- Productions
+
+MasterInformationBlock-SL ::= SEQUENCE {
+   sl-Bandwidth-r12 [0] ENUMERATED { n6(0), n15(1), n25(2), n50(3), n75(4), 
+      n100(5) },
+   tdd-ConfigSL-r12 [1] TDD-ConfigSL-r12,
+   directFrameNumber-r12 [2] BIT STRING  (SIZE (10)),
+   directSubframeNumber-r12 [3] INTEGER (0..9),
+   inCoverage-r12 [4] BOOLEAN,
+   reserved-r12 [5] BIT STRING  (SIZE (19))
+}
+
+SBCCH-SL-BCH-MessageType ::= MasterInformationBlock-SL
+
+MasterInformationBlock-SL-V2X-r14 ::= SEQUENCE {
+   sl-Bandwidth-r14 [0] ENUMERATED { n6(0), n15(1), n25(2), n50(3), n75(4), 
+      n100(5) },
+   tdd-ConfigSL-r14 [1] TDD-ConfigSL-r12,
+   directFrameNumber-r14 [2] BIT STRING  (SIZE (10)),
+   directSubframeNumber-r14 [3] INTEGER (0..9),
+   inCoverage-r14 [4] BOOLEAN,
+   reserved-r14 [5] BIT STRING  (SIZE (27))
+}
+
+SBCCH-SL-BCH-MessageType-V2X-r14 ::= MasterInformationBlock-SL-V2X-r14
+
+SBCCH-SL-BCH-Message ::= SEQUENCE {
+   message [0] SBCCH-SL-BCH-MessageType
+}
+
+SBCCH-SL-BCH-Message-V2X-r14 ::= SEQUENCE {
+   message [0] SBCCH-SL-BCH-MessageType-V2X-r14
+}
+
+END