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bsc_api: Look into the msg and call the right API functions

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For certain messages we will need to call other GSM0808 functions. To
keep the bsc_hack working we will try to send this through the normal
messages first and then fallback to dtap if no handler is registered.

The gsm_04_08.c code is not forced to handle the IPA activation
and channel modify ack anymore. This is done transparently by the
BSC API now.
This commit is contained in:
Holger Hans Peter Freyther
2010-11-04 11:18:03 +01:00
parent fce9307553
commit 6c199e7d99
2 changed files with 51 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
openbsc/src/bsc_api.c
View File

@@ -31,6 +31,8 @@
#include <openbsc/handover.h>
#include <openbsc/debug.h>
#include <osmocore/protocol/gsm_08_08.h>
#include <osmocore/talloc.h>
static LLIST_HEAD(sub_connections);
@@ -147,6 +149,54 @@ int bsc_upqueue(struct gsm_network *net)
return work;
}
static void dispatch_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg)
{
struct bsc_api *api = msg->lchan->ts->trx->bts->network->bsc_api;
struct gsm48_hdr *gh;
uint8_t pdisc;
int rc;
if (msgb_l3len(msg) < sizeof(*gh)) {
LOGP(DMSC, LOGL_ERROR, "Message too short for a GSM48 header.\n");
return;
}
gh = msgb_l3(msg);
pdisc = gh->proto_discr & 0x0f;
switch (pdisc) {
case GSM48_PDISC_RR:
switch (gh->msg_type) {
case GSM48_MT_RR_CIPH_M_COMPL:
if (api->cipher_mode_compl)
return api->cipher_mode_compl(conn, msg,
conn->lchan->encr.alg_id);
break;
case GSM48_MT_RR_ASS_COMPL:
LOGP(DMSC, LOGL_ERROR, "Assignment command is not handled.\n");
break;
case GSM48_MT_RR_ASS_FAIL:
LOGP(DMSC, LOGL_ERROR, "Assignment failure is not handled.\n");
break;
case GSM48_MT_RR_CHAN_MODE_MODIF_ACK:
rc = gsm48_rx_rr_modif_ack(msg);
if (rc < 0 && api->assign_fail)
api->assign_fail(conn,
GSM0808_CAUSE_NO_RADIO_RESOURCE_AVAILABLE);
else if (rc >= 0 && api->assign_compl)
api->assign_compl(conn, 0);
return;
break;
}
break;
case GSM48_PDISC_MM:
break;
}
/* default case */
if (api->dtap)
api->dtap(conn, msg);
}
int gsm0408_rcvmsg(struct msgb *msg, uint8_t link_id)
{
int rc;
@@ -161,7 +211,7 @@ int gsm0408_rcvmsg(struct msgb *msg, uint8_t link_id)
if (lchan->conn) {
api->dtap(lchan->conn, msg);
dispatch_dtap(lchan->conn, msg);
} else {
rc = BSC_API_CONN_POL_REJECT;
lchan->conn = subscr_con_allocate(msg->lchan);

3
openbsc/src/gsm_04_08.c
View File

@@ -1198,9 +1198,6 @@ static int gsm0408_rcv_rr(struct gsm_subscriber_connection *conn, struct msgb *m
case GSM48_MT_RR_PAG_RESP:
rc = gsm48_rx_rr_pag_resp(conn, msg);
break;
case GSM48_MT_RR_CHAN_MODE_MODIF_ACK:
rc = gsm48_rx_rr_modif_ack(msg);
break;
case GSM48_MT_RR_STATUS:
rc = gsm48_rx_rr_status(msg);
break;