diff options
Diffstat (limited to 'openbsc/src/bsc_msc_ip.c')
| -rw-r--r-- | openbsc/src/bsc_msc_ip.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/openbsc/src/bsc_msc_ip.c b/openbsc/src/bsc_msc_ip.c index 18cfbeba9..71b7884b7 100644 --- a/openbsc/src/bsc_msc_ip.c +++ b/openbsc/src/bsc_msc_ip.c @@ -136,21 +136,35 @@ struct gsm_subscriber *find_subscriber(u_int8_t type, const char *mi_string) /* SCCP handling */ void msc_outgoing_sccp_data(struct sccp_connection *conn, struct msgb *msg, unsigned int len) { + struct gsm_lchan *lchan; struct bssmap_header *bs; if (len < 1) { - DEBUGP(DMSC, "The header is too short.\n"); + LOGP(DMSC, LOGL_ERROR, "The header is too short.\n"); + return; + } + + lchan = sccp_get_lchan(conn->data_ctx); + if (!lchan) { + LOGP(DMSC, LOGL_ERROR, "SCCP data without lchan for type: 0x%x\n", msg->l3h[0]); + return; + } + + /* that is bad */ + if (!lchan->msc_data) { + LOGP(DMSC, LOGL_ERROR, "SCCP data for lchan without msc data type: 0x%x\n", + msg->l3h[0]); return; } switch (msg->l3h[0]) { case BSSAP_MSG_BSS_MANAGEMENT: msg->l4h = &msg->l3h[sizeof(*bs)]; - msg->lchan = sccp_get_lchan(conn->data_ctx); + msg->lchan = lchan; bssmap_rcvmsg_dt1(conn, msg, len - sizeof(*bs)); break; case BSSAP_MSG_DTAP: - dtap_rcvmsg(sccp_get_lchan(conn->data_ctx), msg, len); + dtap_rcvmsg(lchan, msg, len); break; default: DEBUGPC(DMSC, "Unimplemented msg type: %d\n", msg->l3h[0]); |