This patch adds signal handling to release memory in the exit
path of the tests. This is good to check what memory we are
leaking in the exist path of the tests.
The sequence to trigger the crash was:
1) establish a full A-bis IPA link (both OML and RSL correctly established
and ID_RESP received from BTS).
2) nc 127.0.0.1 3002 # establish OML link only
I forgot to set to NULL the oml and rsl links we're using. Otherwise,
the test calls e1inp_sign_link_destroy(rsl) which does not exists.
struct e1inp_line_ops {
- enum e1inp_line_role role;
- char *addr;
- void *data;
+ union {
+ struct {
+ enum e1inp_line_role role; /* BSC or BTS mode. */
+ const char *addr; /* IP address .*/
+ void *dev; /* device parameters. */
+ } ipa;
+ struct {
+ const char *port; /* e.g. /dev/ttyUSB0 */
+ unsigned int delay;
+ } rs232;
+ } cfg;
Now this structure contains the configuration details for the
virtual E1 line, instead of using a pointer.
This also get the line_update callback to its original layout:
+ int (*line_update)(struct e1inp_line *line);
It's not a good idea to confuse the two changes with each other. Moving the
Abis part into a separate library is independent from the question whether we
have talloc inside libosmocore or use a stand-alone talloc library.
The ipaccess driver is tricky. Since it uses two ports for OML
and RSL links, the link for RSL needs to be done in the same
line that the OML link.
Now the BSC examples uses the virtual E1 line where the OML
link is for the RSL one.
This patch also verifies that the OML link is up before the
someone tries to get the RSL link up.
This patch steals some code from openBSC to implement the
OML software activate request ack message which is delivered
to the BTS.
This allows to test the ->sign_link(...) path.
This patch is a major update of the callback infrastructure, now
the e1input_ops looks like the following:
struct e1inp_sign_link * (*sign_link_up)(void *unit_info, struct e1inp_line *line, enum e1inp_sign_type type);
void (*sign_link_down)(struct e1inp_line *line);
int (*sign_link)(struct msgb *msg, struct e1inp_sign_link *link);
The sign_link_up and sign_link_down will be used by the A-bis over IP
input drivers.
The sign_link_up callback is used if we receive a ID_RESP message, in
that case, we have to set up the sign link for the corresponding new
OML/RSL signal link. The pointer to unit_info provides a data structure
that contains the BTS device details if we run as BSC, and the requested
device information from the BSC if we run as BTS. The sign_link_up
callback must return the new sign_link created.
The sign_link_down callback is invoked if the line does down, which
means that the counterpart has closed the socket.
The sign_link callback is used to handle all RSL/OML messages.
I have also added the following callback to the e1inp_driver:
+ void (*close)(struct e1inp_ts *ts);
Which is invoked if you call e1inp_sign_link_destroy(). This callback
is used to close the socket that is linked to that timeslot. This is
useful for A-bis over IP drivers since sockets are closed if the
OML/RSL signalling link is destroyed.
As you can notice, I have also added all the ID_RESP parsing into
libosmo-abis for both ipaccess and hsl drivers.
This patch also contains a rework of the ipa_client_link whose
integration with the e1_input infrastructure was broken (the
transmission path was broken).
This patch also contains more develop examples that act as BSC
and BTS for the ipaccess driver.
Sorry, I know it would be better to split all these changes into
logical pieces but many of them are tightly related.
This is under heavy development stage, it's anyway hard to track
changes until this becomes more stable.
This patch uses the new libosmocore logging infrastructure
that allows to invoke log_init(&my_log_info) multiple times
so we can register categories from libraries and applications.
struct e1inp_line_ops {
int (*sign_link_up)(struct msgb *msg, struct e1inp_line *line);
int (*sign_link)(struct msgb *msg, struct e1inp_sign_link *link);
int (*error)(struct msgb *msg, int error);
};
The description of the operations is the following:
* sign_link_up is invoked if the signalling link becomes up. In A-bis
over IP, we have to wait until the other peer identifies itself as
a BTS/BSC device, then this function is invoked. This function is not
used by ISDN drivers, the signalling link can be set up just after
the line is created.
* sign_link is called if we receive OML/RSL message. This function
is used both by ISDN and A-bis over IP drivers.
* error is called if we receive a malformed message. It is used both
by ISDN and A-bis over IP drivers.
Pau Espin
Pablo Neira Ayuso
Harald Welte