tree 82cc01c58b61f253f16ea56b768bdcaecf7360fd
parent 7e31f847af411d5d29fd8189be6e91dc85581ffb
author Jacob Erlbeck <jerlbeck@sysmocom.de> 1411404874 +0200
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1412870475 +0200

gbproxy/test: Save and check received messages

Currently the only way to check, whether the right message have been
generated is to look into the generated text output. This is
error-prone if there are many messages.

This patch adds a way to optionally store all received messages into
a FIFO. They can then be checked by calling expect_msg() which
removes the first message from the FIFO and returns a pointer to it
or NULL if there is none. The pointer is only valid until the next
call to this function.

A few convenience functions are added to check for common message
types:

  - expect_gmm_msg checks for certain GSM 04.08 messages in LLC/GMM
  - expect_llc_msg checks for arbitrary LLC messages in BSSGP/UD
  - expect_bssgp_msg checks for arbitrary BSSG messages

Each of their arguments can be set by MATCH_ANY to ignore it while
matching. On success, they return a pointer to a statically
allocated struct containing the pointer to the msg and the full parse
context.

Recording is enabled by setting the global variable received_messages
to a pointer to a struct llist_head. It can be disabled again by
setting it to NULL.

Sponsored-by: On-Waves ehf