gprs: Handle incoming IPA CCM message in gsup_client_read_cb
Currently the IPA CCM messages are not handled by the GSUP client.
This means, that the client doesn't answer to PING and ID_GET and
logs notices when receiving PONG or ID_ACK. At least the PING
functionality (remotely originated PING) shall be supported.
This patch extends gsup_client_read_cb by a call to
ipaccess_bts_handle_ccm. Only when the return code is 0, the message
is processed further and checked for an OSMO/GSUP message. ID_GET
messages are answered by a dummy description, where only the
unit_name is set to 'SGSN'.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gprs_gsup_client.c b/openbsc/src/gprs/gprs_gsup_client.c
index 7bf67b7..9865429 100644
--- a/openbsc/src/gprs/gprs_gsup_client.c
+++ b/openbsc/src/gprs/gprs_gsup_client.c
@@ -105,6 +105,31 @@
struct ipaccess_head *hh = (struct ipaccess_head *) msg->data;
struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg);
struct gprs_gsup_client *gsupc = (struct gprs_gsup_client *)link->data;
+ int rc;
+ static struct ipaccess_unit ipa_dev = {
+ .unit_name = "SGSN"
+ };
+
+ msg->l2h = &hh->data[0];
+
+ rc = ipaccess_bts_handle_ccm(link, &ipa_dev, msg);
+
+ if (rc < 0) {
+ LOGP(DGPRS, LOGL_NOTICE,
+ "GSUP received an invalid IPA/CCM message from %s:%d\n",
+ link->addr, link->port);
+ /* Link has been closed */
+ gsupc->is_connected = 0;
+ msgb_free(msg);
+ return -1;
+ }
+
+ if (rc == 1) {
+ /* CCM message */
+
+ msgb_free(msg);
+ return 0;
+ }
if (hh->proto != IPAC_PROTO_OSMO)
goto invalid;