ipaccess: initial works to get BTS mode working
This patch adds the initial support to get BTS mode working with
the ipaccess driver.
Now, the driver handles IPA ping, pong and id_ack messages
internally in BTS modes, and it passes the signalling messages
to the client application by invoking the callback line operations.
Moreover, with this patch, each IPA link object always has one
E1 line object associated.
Still HSL BTS-mode remains unimplemented.
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index 71db51d..19e5a53 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -428,6 +428,56 @@
return 0;
}
+static int ipaccess_bts_cb(struct ipa_link *link, struct msgb *msg)
+{
+ struct ipaccess_head *hh = (struct ipaccess_head *) msg->data;
+ struct e1inp_ts *e1i_ts = NULL;
+ struct e1inp_sign_link *sign_link;
+
+ /* special handling for IPA CCM. */
+ if (hh->proto == IPAC_PROTO_IPACCESS) {
+ uint8_t msg_type = *(msg->l2h);
+
+ /* ping, pong and acknowledgment cases. */
+ ipaccess_rcvmsg_base(msg, &link->ofd);
+
+ /* this is a request for identification from the BSC. */
+ if (msg_type == IPAC_MSGT_ID_GET) {
+ LOGP(DINP, LOGL_NOTICE, "received ID get\n");
+ if (!link->line->ops.sign_link_up) {
+ LOGP(DINP, LOGL_ERROR, "Fix your application, "
+ "no action set if the signalling link "
+ "becomes ready\n");
+ return -EINVAL;
+ }
+ link->line->ops.sign_link_up(msg, link->line);
+ }
+ return 0;
+ } else if (link->port == IPA_TCP_PORT_OML)
+ e1i_ts = &link->line->ts[0];
+ else if (link->port == IPA_TCP_PORT_RSL)
+ e1i_ts = &link->line->ts[1];
+
+ /* look up for some existing signaling link. */
+ sign_link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0);
+ if (sign_link == NULL) {
+ LOGP(DINP, LOGL_ERROR, "no matching signalling link for "
+ "hh->proto=0x%02x\n", hh->proto);
+ msgb_free(msg);
+ return -EIO;
+ }
+ msg->dst = sign_link;
+
+ /* XXX better use e1inp_ts_rx? */
+ if (!link->line->ops.sign_link) {
+ LOGP(DINP, LOGL_ERROR, "Fix your application, "
+ "no action set for signalling messages.\n");
+ return -ENOENT;
+ }
+ link->line->ops.sign_link(msg, sign_link);
+ return 0;
+}
+
static int ipaccess_line_update(struct e1inp_line *line,
enum e1inp_line_role role, const char *addr)
{
@@ -473,8 +523,9 @@
LOGP(DINP, LOGL_NOTICE, "enabling ipaccess BTS mode\n");
- link = ipa_client_link_create(tall_ipa_ctx,
- addr, IPA_TCP_PORT_OML);
+ link = ipa_client_link_create(tall_ipa_ctx, line,
+ addr, IPA_TCP_PORT_OML,
+ ipaccess_bts_cb);
if (link == NULL) {
LOGP(DINP, LOGL_ERROR, "cannot create OML "
"BTS link: %s\n", strerror(errno));
@@ -487,8 +538,9 @@
ipa_client_link_destroy(link);
return -EIO;
}
- rsl_link = ipa_client_link_create(tall_ipa_ctx,
- addr, IPA_TCP_PORT_RSL);
+ rsl_link = ipa_client_link_create(tall_ipa_ctx, line,
+ addr, IPA_TCP_PORT_RSL,
+ ipaccess_bts_cb);
if (rsl_link == NULL) {
LOGP(DINP, LOGL_ERROR, "cannot create RSL "
"BTS link: %s\n", strerror(errno));