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bsc: Implement DTAP coming from the MSC and forward to the BSC API

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This commit is contained in:
Holger Hans Peter Freyther
2010-11-10 10:17:05 +01:00
parent 50c579b8c5
commit dbc698aef0
1 changed files with 38 additions and 1 deletions
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39
openbsc/src/bsc/osmo_bsc_bssap.c
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@@ -444,7 +444,44 @@ static int bssmap_rcvmsg_dt1(struct osmo_bsc_sccp_con *conn,
static int dtap_rcvmsg(struct osmo_bsc_sccp_con *conn,
struct msgb *msg, unsigned int length)
{
return -1;
struct dtap_header *header;
struct msgb *gsm48;
uint8_t *data;
if (!conn->conn) {
LOGP(DMSC, LOGL_ERROR, "No subscriber connection available\n");
return -1;
}
header = (struct dtap_header *) msg->l3h;
if (sizeof(*header) >= length) {
LOGP(DMSC, LOGL_ERROR, "The DTAP header does not fit. Wanted: %u got: %u\n", sizeof(*header), length);
LOGP(DMSC, LOGL_ERROR, "hex: %s\n", hexdump(msg->l3h, length));
return -1;
}
if (header->length > length - sizeof(*header)) {
LOGP(DMSC, LOGL_ERROR, "The DTAP l4 information does not fit: header: %u length: %u\n", header->length, length);
LOGP(DMSC, LOGL_ERROR, "hex: %s\n", hexdump(msg->l3h, length));
return -1;
}
LOGP(DMSC, LOGL_DEBUG, "DTAP message: SAPI: %u CHAN: %u\n", header->link_id & 0x07, header->link_id & 0xC0);
/* forward the data */
gsm48 = gsm48_msgb_alloc();
if (!gsm48) {
LOGP(DMSC, LOGL_ERROR, "Allocation of the message failed.\n");
return -1;
}
gsm48->l3h = gsm48->data;
data = msgb_put(gsm48, length - sizeof(*header));
memcpy(data, msg->l3h + sizeof(*header), length - sizeof(*header));
/* pass it to the filter for extra actions */
bsc_scan_msc_msg(conn->conn, gsm48);
return gsm0808_submit_dtap(conn->conn, gsm48, header->link_id, 1);
}
int bsc_handle_udt(struct gsm_network *network,