diff options
Diffstat (limited to 'openbsc/src/gprs/sgsn_libgtp.c')
-rw-r--r-- | openbsc/src/gprs/sgsn_libgtp.c | 130 |
1 files changed, 111 insertions, 19 deletions
diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c index aaf7e7aa7..303fa887c 100644 --- a/openbsc/src/gprs/sgsn_libgtp.c +++ b/openbsc/src/gprs/sgsn_libgtp.c @@ -37,6 +37,7 @@ #include <osmocom/core/talloc.h> #include <osmocom/core/select.h> #include <osmocom/core/rate_ctr.h> +#include <osmocom/crypt/auth.h> #include <osmocom/gprs/gprs_bssgp.h> #include <osmocom/gsm/protocol/gsm_04_08_gprs.h> @@ -47,6 +48,11 @@ #include <openbsc/gprs_sgsn.h> #include <openbsc/gprs_gmm.h> #include <openbsc/gsm_subscriber.h> +#include <openbsc/iu.h> + +#include <osmocom/ranap/ranap_ies_defs.h> + +#include <asn1c/asn1helpers.h> #include <gtp.h> #include <pdp.h> @@ -218,7 +224,10 @@ struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn, memcpy(pdp->gsnlc.v, &sgsn->cfg.gtp_listenaddr.sin_addr, sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); - /* SGSN address for user plane */ + /* SGSN address for user plane + * Default to the control plane addr for now. If we are connected to a + * hnbgw via IuPS we'll need to send a PDP context update with the + * correct IP address after the RAB Assignment is complete */ pdp->gsnlu.l = sizeof(sgsn->cfg.gtp_listenaddr.sin_addr); memcpy(pdp->gsnlu.v, &sgsn->cfg.gtp_listenaddr.sin_addr, sizeof(sgsn->cfg.gtp_listenaddr.sin_addr)); @@ -239,7 +248,7 @@ struct sgsn_pdp_ctx *sgsn_create_pdp_ctx(struct sgsn_ggsn_ctx *ggsn, pdp->userloc_given = 1; pdp->userloc.l = 8; pdp->userloc.v[0] = 0; /* CGI for GERAN */ - bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->cell_id); + bssgp_create_cell_id(&pdp->userloc.v[1], &mmctx->ra, mmctx->gb.cell_id); /* include the IMEI(SV) */ pdp->imeisv_given = 1; @@ -304,6 +313,19 @@ static const struct cause_map gtp2sm_cause_map[] = { { 0, 0 } }; +static int send_act_pdp_cont_acc(struct sgsn_pdp_ctx *pctx) +{ + struct sgsn_signal_data sig_data; + + /* Inform others about it */ + memset(&sig_data, 0, sizeof(sig_data)); + sig_data.pdp = pctx; + osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); + + /* Send PDP CTX ACT to MS */ + return gsm48_tx_gsm_act_pdp_acc(pctx); +} + /* The GGSN has confirmed the creation of a PDP Context */ static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) { @@ -340,16 +362,17 @@ static int create_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) goto reject; } - /* Activate the SNDCP layer */ - sndcp_sm_activate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi); + if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { + /* Activate the SNDCP layer */ + sndcp_sm_activate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); - /* Inform others about it */ - memset(&sig_data, 0, sizeof(sig_data)); - sig_data.pdp = pctx; - osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_ACT, &sig_data); - /* Send PDP CTX ACT to MS */ - return gsm48_tx_gsm_act_pdp_acc(pctx); + return send_act_pdp_cont_acc(pctx); + } else { + /* Activate a radio bearer */ + iu_rab_act_ps(pdp->nsapi, pctx, 1); + return 0; + } reject: /* @@ -372,6 +395,70 @@ reject: return EOF; } +/* Callback for RAB assignment response */ +int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies) +{ + uint8_t rab_id; + bool require_pdp_update = false; + struct sgsn_pdp_ctx *pdp = NULL; + RANAP_RAB_SetupOrModifiedItem_t *item = &setup_ies->raB_SetupOrModifiedItem; + + rab_id = item->rAB_ID.buf[0]; + + pdp = sgsn_pdp_ctx_by_nsapi(ctx, rab_id); + if (!pdp) { + LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Response for unknown RAB/NSAPI=%u\n", rab_id); + return -1; + } + + if (item->transportLayerAddress) { + LOGPC(DRANAP, LOGL_INFO, " Setup: (%u/%s)", rab_id, osmo_hexdump(item->transportLayerAddress->buf, + item->transportLayerAddress->size)); + switch (item->transportLayerAddress->size) { + case 7: + /* It must be IPv4 inside a X213 NSAP */ + memcpy(pdp->lib->gsnlu.v, &item->transportLayerAddress->buf[3], 4); + break; + case 4: + /* It must be a raw IPv4 address */ + memcpy(pdp->lib->gsnlu.v, item->transportLayerAddress->buf, 4); + break; + case 16: + /* TODO: It must be a raw IPv6 address */ + case 19: + /* TODO: It must be IPv6 inside a X213 NSAP */ + default: + LOGP(DRANAP, LOGL_ERROR, "RAB Assignment Resp: Unknown " + "transport layer address size %u\n", + item->transportLayerAddress->size); + return -1; + } + require_pdp_update = true; + } + + /* The TEI on the RNC side might have changed, too */ + if (item->iuTransportAssociation && + item->iuTransportAssociation->present == RANAP_IuTransportAssociation_PR_gTP_TEI && + item->iuTransportAssociation->choice.gTP_TEI.buf && + item->iuTransportAssociation->choice.gTP_TEI.size >= 4) { + uint32_t tei = osmo_load32be(item->iuTransportAssociation->choice.gTP_TEI.buf); + LOGP(DRANAP, LOGL_DEBUG, "Updating TEID on RNC side from 0x%08x to 0x%08x\n", + pdp->lib->teid_own, tei); + pdp->lib->teid_own = tei; + require_pdp_update = true; + } + + if (require_pdp_update) + gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0); + + if (pdp->state != PDP_STATE_CR_CONF) { + send_act_pdp_cont_acc(pdp); + pdp->state = PDP_STATE_CR_CONF; + } + return 0; + +} + /* Confirmation of a PDP Context Delete */ static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) { @@ -387,8 +474,13 @@ static int delete_pdp_conf(struct pdp_t *pdp, void *cbp, int cause) osmo_signal_dispatch(SS_SGSN, S_SGSN_PDP_DEACT, &sig_data); if (pctx->mm) { - /* Deactivate the SNDCP layer */ - sndcp_sm_deactivate_ind(&pctx->mm->llme->lle[pctx->sapi], pctx->nsapi); + if (pctx->mm->ran_type == MM_CTX_T_GERAN_Gb) { + /* Deactivate the SNDCP layer */ + sndcp_sm_deactivate_ind(&pctx->mm->gb.llme->lle[pctx->sapi], pctx->nsapi); + } else { + /* Dectivate a radio bearer */ + iu_rab_deact(pctx->mm->iu.ue_ctx, 1); + } /* Confirm deactivation of PDP context to MS */ rc = gsm48_tx_gsm_deact_pdp_acc(pctx); @@ -521,9 +613,9 @@ static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) ud = msgb_put(msg, len); memcpy(ud, packet, len); - msgb_tlli(msg) = mm->tlli; - msgb_bvci(msg) = mm->bvci; - msgb_nsei(msg) = mm->nsei; + msgb_tlli(msg) = mm->gb.tlli; + msgb_bvci(msg) = mm->gb.bvci; + msgb_nsei(msg) = mm->gb.nsei; switch (mm->mm_state) { case GMM_REGISTERED_SUSPENDED: @@ -531,12 +623,12 @@ static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) memset(&pinfo, 0, sizeof(pinfo)); pinfo.mode = BSSGP_PAGING_PS; pinfo.scope = BSSGP_PAGING_BVCI; - pinfo.bvci = mm->bvci; + pinfo.bvci = mm->gb.bvci; pinfo.imsi = mm->imsi; pinfo.ptmsi = &mm->p_tmsi; pinfo.drx_params = mm->drx_parms; pinfo.qos[0] = 0; // FIXME - bssgp_tx_paging(mm->nsei, 0, &pinfo); + bssgp_tx_paging(mm->gb.nsei, 0, &pinfo); rate_ctr_inc(&mm->ctrg->ctr[GMM_CTR_PAGING_PS]); /* FIXME: queue the packet we received from GTP */ break; @@ -544,7 +636,7 @@ static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) break; default: LOGP(DGPRS, LOGL_ERROR, "GTP DATA IND for TLLI %08X in state " - "%u\n", mm->tlli, mm->mm_state); + "%u\n", mm->gb.tlli, mm->mm_state); msgb_free(msg); return -1; } @@ -557,7 +649,7 @@ static int cb_data_ind(struct pdp_t *lib, void *packet, unsigned int len) /* It is easier to have a global count */ pdp->cdr_bytes_out += len; - return sndcp_unitdata_req(msg, &mm->llme->lle[pdp->sapi], + return sndcp_unitdata_req(msg, &mm->gb.llme->lle[pdp->sapi], pdp->nsapi, mm); } |