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Though these can never be used uninitialized, initialize to NULL to
avoid compiler warnings like:
pfcp_msg.c:188:66: warning: 'h_no_seid' may be used uninitialized
Change-Id: Icb338b200fe3186ccd7fd3f502c1723f60947190
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During code review, it was indicated that some TLV protocols that we
will likely deal with in the near future also employ an I, and instance
value of a tag. Add TLIV support.
A usage example for a manually implemented TLIV structure is found in
tests/libosmo-gtlv/gtlv_test.c.
A usage example for a generated TLIV protocol is found in
tests/libosmo-gtlv/test_tliv/.
Related: SYS#5599
Change-Id: I0a076e54dfba6038cc779cb7c8f3967d212226aa
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Add osmo_gtlv_coding: describe the value part of a TLV (decode and
encode), describe a struct with its members, and get/put readily decoded
structs from/to a raw PDU, directly.
With osmo_gtlv_coding defined for a protocol's tags, we only deal with
encoded PDUs or fully decoded C structs, no TLV related
re-implementations clutter up the message handling code.
A usage example is given in gtlv_dec_enc_test. The first real use will be
the PFCP protocol in osmo-upf.git.
With osmo_gtlv_coding, there still is a lot of monkey work involved in
describing the decoded structs. A subsequent patch adds a generator for
osmo_gtlv_coding and message structs from tag value lists.
Related: SYS#5599
Change-Id: I65de793105882a452124ee58adb0e58469e6e796
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