[GPRS] hand SNDCP N-PDUs to the GTP to the GGSN
This so far only works for UNIT-DATA and only if the N-PDU is not fragmented at
the SNDCP layer.
diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c
index 7df9325..03de8cc 100644
--- a/openbsc/src/gprs/sgsn_libgtp.c
+++ b/openbsc/src/gprs/sgsn_libgtp.c
@@ -42,6 +42,8 @@
#include <openbsc/signal.h>
#include <openbsc/debug.h>
#include <openbsc/sgsn.h>
+#include <openbsc/gprs_llc.h>
+#include <openbsc/gprs_bssgp.h>
#include <openbsc/gprs_sgsn.h>
#include <openbsc/gprs_gmm.h>
@@ -255,6 +257,9 @@
goto reject;
}
+ /* Activate the SNDCP layer */
+ sndcp_sm_activate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi);
+
/* Send PDP CTX ACT to MS */
return gsm48_tx_gsm_act_pdp_acc(pctx);
@@ -356,6 +361,36 @@
return 0;
}
+/* Called by SNDCP when it has received/re-assembled a N-PDU */
+int sgsn_rx_sndcp_ud_ind(uint32_t tlli, uint8_t nsapi, struct msgb *msg,
+ uint32_t npdu_len, uint8_t *npdu)
+{
+ struct sgsn_mm_ctx *mmctx;
+ struct sgsn_pdp_ctx *pdp;
+ struct gprs_ra_id ra_id;
+
+ /* look-up the MM context for this message */
+ bssgp_parse_cell_id(&ra_id, msgb_bcid(msg));
+ mmctx = sgsn_mm_ctx_by_tlli(tlli, &ra_id);
+ if (!mmctx) {
+ LOGP(DGPRS, LOGL_ERROR,
+ "Cannot find MM CTX for TLLI %08x\n", tlli);
+ return -EIO;
+ }
+ /* look-up the PDP context for this message */
+ pdp = sgsn_pdp_ctx_by_nsapi(mmctx, nsapi);
+ if (!pdp) {
+ LOGP(DGPRS, LOGL_ERROR, "Cannot find PDP CTX for "
+ "TLLI=%08x, NSAPI=%u\n", tlli, nsapi);
+ return -EIO;
+ }
+ if (!pdp->lib) {
+ LOGP(DGPRS, LOGL_ERROR, "PDP CTX without libgtp\n");
+ return -EIO;
+ }
+ return gtp_data_req(pdp->ggsn->gsn, pdp->lib, npdu, npdu_len);
+}
+
/* libgtp select loop integration */
static int sgsn_gtp_fd_cb(struct bsc_fd *fd, unsigned int what)
{