| /* GPRS SNDCP protocol implementation as per 3GPP TS 04.65 */ |
| |
| /* (C) 2010 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2010 by On-Waves |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <errno.h> |
| #include <stdint.h> |
| |
| #include <osmocore/msgb.h> |
| #include <osmocore/linuxlist.h> |
| #include <osmocore/timer.h> |
| #include <osmocore/talloc.h> |
| |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gprs_bssgp.h> |
| #include <openbsc/gprs_llc.h> |
| #include <openbsc/sgsn.h> |
| |
| #include "gprs_sndcp.h" |
| |
| /* Chapter 7.2: SN-PDU Formats */ |
| struct sndcp_common_hdr { |
| /* octet 1 */ |
| uint8_t nsapi:4; |
| uint8_t more:1; |
| uint8_t type:1; |
| uint8_t first:1; |
| uint8_t spare:1; |
| } __attribute__((packed)); |
| |
| /* PCOMP / DCOMP only exist in first fragment */ |
| struct sndcp_comp_hdr { |
| /* octet 2 */ |
| uint8_t pcomp:4; |
| uint8_t dcomp:4; |
| } __attribute__((packed)); |
| |
| struct sndcp_udata_hdr { |
| /* octet 3 */ |
| uint8_t npdu_high:4; |
| uint8_t seg_nr:4; |
| /* octet 4 */ |
| uint8_t npdu_low; |
| } __attribute__((packed)); |
| |
| |
| static void *tall_sndcp_ctx; |
| |
| /* A fragment queue entry, containing one framgent of a N-PDU */ |
| struct defrag_queue_entry { |
| struct llist_head list; |
| /* segment number of this fragment */ |
| uint32_t seg_nr; |
| /* length of the data area of this fragment */ |
| uint32_t data_len; |
| /* pointer to the data of this fragment */ |
| uint8_t *data; |
| }; |
| |
| LLIST_HEAD(gprs_sndcp_entities); |
| |
| /* Enqueue a fragment into the defragment queue */ |
| static int defrag_enqueue(struct gprs_sndcp_entity *sne, uint8_t seg_nr, |
| uint8_t *data, uint32_t data_len) |
| { |
| struct defrag_queue_entry *dqe; |
| |
| dqe = talloc_zero(tall_sndcp_ctx, struct defrag_queue_entry); |
| if (!dqe) |
| return -ENOMEM; |
| dqe->data = talloc_zero_size(dqe, data_len); |
| if (!dqe->data) { |
| talloc_free(dqe); |
| return -ENOMEM; |
| } |
| dqe->seg_nr = seg_nr; |
| dqe->data_len = data_len; |
| |
| llist_add(&dqe->list, &sne->defrag.frag_list); |
| |
| if (seg_nr > sne->defrag.highest_seg) |
| sne->defrag.highest_seg = seg_nr; |
| |
| sne->defrag.seg_have |= (1 << seg_nr); |
| sne->defrag.tot_len += data_len; |
| |
| memcpy(dqe->data, data, data_len); |
| |
| return 0; |
| } |
| |
| /* return if we have all segments of this N-PDU */ |
| static int defrag_have_all_segments(struct gprs_sndcp_entity *sne) |
| { |
| uint32_t seg_needed = 0; |
| unsigned int i; |
| |
| /* create a bitmask of needed segments */ |
| for (i = 0; i <= sne->defrag.highest_seg; i++) |
| seg_needed |= (1 << i); |
| |
| if (seg_needed == sne->defrag.seg_have) |
| return 1; |
| |
| return 0; |
| } |
| |
| static struct defrag_queue_entry *defrag_get_seg(struct gprs_sndcp_entity *sne, |
| uint32_t seg_nr) |
| { |
| struct defrag_queue_entry *dqe; |
| |
| llist_for_each_entry(dqe, &sne->defrag.frag_list, list) { |
| if (dqe->seg_nr == seg_nr) { |
| llist_del(&dqe->list); |
| return dqe; |
| } |
| } |
| return NULL; |
| } |
| |
| /* Perform actual defragmentation and create an output packet */ |
| static int defrag_segments(struct gprs_sndcp_entity *sne) |
| { |
| struct msgb *msg; |
| unsigned int seg_nr; |
| uint8_t *npdu; |
| |
| LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Defragment output PDU %u " |
| "num_seg=%u tot_len=%u\n", sne->lle->llme->tlli, sne->nsapi, |
| sne->defrag.npdu, sne->defrag.highest_seg, sne->defrag.tot_len); |
| msg = msgb_alloc_headroom(sne->defrag.tot_len+256, 128, "SNDCP Defrag"); |
| if (!msg) |
| return -ENOMEM; |
| |
| /* FIXME: message headers + identifiers */ |
| |
| npdu = msg->data; |
| |
| for (seg_nr = 0; seg_nr <= sne->defrag.highest_seg; seg_nr++) { |
| struct defrag_queue_entry *dqe; |
| uint8_t *data; |
| |
| dqe = defrag_get_seg(sne, seg_nr); |
| if (!dqe) { |
| LOGP(DSNDCP, LOGL_ERROR, "Segment %u missing\n", seg_nr); |
| talloc_free(msg); |
| return -EIO; |
| } |
| /* actually append the segment to the N-PDU */ |
| data = msgb_put(msg, dqe->data_len); |
| memcpy(data, dqe->data, dqe->data_len); |
| |
| /* release memory for the fragment queue entry */ |
| talloc_free(dqe); |
| } |
| |
| /* FIXME: cancel timer */ |
| |
| /* actually send the N-PDU to the SGSN core code, which then |
| * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */ |
| return sgsn_rx_sndcp_ud_ind(&sne->ra_id, sne->lle->llme->tlli, |
| sne->nsapi, msg, sne->defrag.tot_len, npdu); |
| } |
| |
| static int defrag_input(struct gprs_sndcp_entity *sne, struct msgb *msg, uint8_t *hdr, |
| unsigned int len) |
| { |
| struct sndcp_common_hdr *sch; |
| struct sndcp_comp_hdr *scomph = NULL; |
| struct sndcp_udata_hdr *suh; |
| uint16_t npdu_num; |
| uint8_t *data; |
| int rc; |
| |
| sch = (struct sndcp_common_hdr *) hdr; |
| if (sch->first) { |
| scomph = (struct sndcp_comp_hdr *) (hdr + 1); |
| suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr)); |
| } else |
| suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr)); |
| |
| data = (uint8_t *)suh + sizeof(struct sndcp_udata_hdr); |
| |
| npdu_num = (suh->npdu_high << 8) | suh->npdu_low; |
| |
| LOGP(DSNDCP, LOGL_DEBUG, "TLLI=0x%08x NSAPI=%u: Input PDU %u Segment %u " |
| "Length %u %s %s\n", sne->lle->llme->tlli, sne->nsapi, npdu_num, |
| suh->seg_nr, len, sch->first ? "F " : "", sch->more ? "M" : ""); |
| |
| if (sch->first) { |
| /* first segment of a new packet. Discard all leftover fragments of |
| * previous packet */ |
| if (!llist_empty(&sne->defrag.frag_list)) { |
| struct defrag_queue_entry *dqe, *dqe2; |
| LOGP(DSNDCP, LOGL_INFO, "TLLI=0x%08x NSAPI=%u: Dropping " |
| "SN-PDU %u due to insufficient segments (%04x)\n", |
| sne->lle->llme->tlli, sne->nsapi, sne->defrag.npdu, |
| sne->defrag.seg_have); |
| llist_for_each_entry_safe(dqe, dqe2, &sne->defrag.frag_list, list) { |
| llist_del(&dqe->list); |
| talloc_free(dqe); |
| } |
| } |
| /* store the currently de-fragmented PDU number */ |
| sne->defrag.npdu = npdu_num; |
| |
| /* Re-set fragmentation state */ |
| sne->defrag.no_more = sne->defrag.highest_seg = sne->defrag.seg_have = 0; |
| sne->defrag.tot_len = 0; |
| /* FIXME: (re)start timer */ |
| } |
| |
| if (sne->defrag.npdu != npdu_num) { |
| LOGP(DSNDCP, LOGL_INFO, "Segment for different SN-PDU " |
| "(%u != %u)\n", npdu_num, sne->defrag.npdu); |
| /* FIXME */ |
| } |
| |
| /* FIXME: check if seg_nr already exists */ |
| /* make sure to subtract length of SNDCP header from 'len' */ |
| rc = defrag_enqueue(sne, suh->seg_nr, data, len - (data - hdr)); |
| if (rc < 0) |
| return rc; |
| |
| if (!sch->more) { |
| /* this is suppsed to be the last segment of the N-PDU, but it |
| * might well be not the last to arrive */ |
| sne->defrag.no_more = 1; |
| } |
| |
| if (sne->defrag.no_more) { |
| /* we have already received the last segment before, let's check |
| * if all the previous segments exist */ |
| if (defrag_have_all_segments(sne)) |
| return defrag_segments(sne); |
| } |
| |
| return 0; |
| } |
| |
| static struct gprs_sndcp_entity *gprs_sndcp_entity_by_lle(const struct gprs_llc_lle *lle, |
| uint8_t nsapi) |
| { |
| struct gprs_sndcp_entity *sne; |
| |
| llist_for_each_entry(sne, &gprs_sndcp_entities, list) { |
| if (sne->lle == lle && sne->nsapi == nsapi) |
| return sne; |
| } |
| return NULL; |
| } |
| |
| static struct gprs_sndcp_entity *gprs_sndcp_entity_alloc(struct gprs_llc_lle *lle, |
| uint8_t nsapi) |
| { |
| struct gprs_sndcp_entity *sne; |
| |
| sne = talloc_zero(tall_sndcp_ctx, struct gprs_sndcp_entity); |
| if (!sne) |
| return NULL; |
| |
| sne->lle = lle; |
| sne->nsapi = nsapi; |
| sne->defrag.timer.data = sne; |
| //sne->fqueue.timer.cb = FIXME; |
| sne->rx_state = SNDCP_RX_S_FIRST; |
| INIT_LLIST_HEAD(&sne->defrag.frag_list); |
| |
| llist_add(&sne->list, &gprs_sndcp_entities); |
| |
| return sne; |
| } |
| |
| /* Entry point for the SNSM-ACTIVATE.indication */ |
| int sndcp_sm_activate_ind(struct gprs_llc_lle *lle, uint8_t nsapi) |
| { |
| LOGP(DSNDCP, LOGL_INFO, "SNSM-ACTIVATE.ind (lle=%p TLLI=%08x, " |
| "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi); |
| |
| if (gprs_sndcp_entity_by_lle(lle, nsapi)) { |
| LOGP(DSNDCP, LOGL_ERROR, "Trying to ACTIVATE " |
| "already-existing entity (TLLI=%08x, NSAPI=%u)\n", |
| lle->llme->tlli, nsapi); |
| return -EEXIST; |
| } |
| |
| if (!gprs_sndcp_entity_alloc(lle, nsapi)) { |
| LOGP(DSNDCP, LOGL_ERROR, "Out of memory during ACTIVATE\n"); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| /* Entry point for the SNSM-DEACTIVATE.indication */ |
| int sndcp_sm_deactivate_ind(struct gprs_llc_lle *lle, uint8_t nsapi) |
| { |
| struct gprs_sndcp_entity *sne; |
| |
| LOGP(DSNDCP, LOGL_INFO, "SNSM-DEACTIVATE.ind (lle=%p, TLLI=%08x, " |
| "SAPI=%u, NSAPI=%u)\n", lle, lle->llme->tlli, lle->sapi, nsapi); |
| |
| sne = gprs_sndcp_entity_by_lle(lle, nsapi); |
| if (!sne) { |
| LOGP(DSNDCP, LOGL_ERROR, "SNSM-DEACTIVATE.ind for non-" |
| "existing TLLI=%08x SAPI=%u NSAPI=%u\n", lle->llme->tlli, |
| lle->sapi, nsapi); |
| return -ENOENT; |
| } |
| llist_del(&sne->list); |
| /* frag queue entries are hierarchically allocated, so no need to |
| * free them explicitly here */ |
| talloc_free(sne); |
| |
| return 0; |
| } |
| |
| /* Fragmenter state */ |
| struct sndcp_frag_state { |
| uint8_t frag_nr; |
| struct msgb *msg; /* original message */ |
| uint8_t *next_byte; /* first byte of next fragment */ |
| |
| struct gprs_sndcp_entity *sne; |
| void *mmcontext; |
| }; |
| |
| /* returns '1' if there are more fragments to send, '0' if none */ |
| static int sndcp_send_ud_frag(struct sndcp_frag_state *fs) |
| { |
| struct gprs_sndcp_entity *sne = fs->sne; |
| struct gprs_llc_lle *lle = sne->lle; |
| struct sndcp_common_hdr *sch; |
| struct sndcp_comp_hdr *scomph; |
| struct sndcp_udata_hdr *suh; |
| struct msgb *fmsg; |
| unsigned int max_payload_len; |
| unsigned int len; |
| uint8_t *data; |
| int rc, more; |
| |
| fmsg = msgb_alloc_headroom(fs->sne->lle->params.n201_u+256, 128, |
| "SNDCP Frag"); |
| if (!fmsg) |
| return -ENOMEM; |
| |
| /* make sure lower layers route the fragment like the original */ |
| msgb_tlli(fmsg) = msgb_tlli(fs->msg); |
| msgb_bvci(fmsg) = msgb_bvci(fs->msg); |
| msgb_nsei(fmsg) = msgb_nsei(fs->msg); |
| |
| /* prepend common SNDCP header */ |
| sch = (struct sndcp_common_hdr *) msgb_put(fmsg, sizeof(*sch)); |
| sch->nsapi = sne->nsapi; |
| /* Set FIRST bit if we are the first fragment in a series */ |
| if (fs->frag_nr == 0) |
| sch->first = 1; |
| sch->type = 1; |
| |
| /* append the compression header for first fragment */ |
| if (sch->first) { |
| scomph = (struct sndcp_comp_hdr *) |
| msgb_put(fmsg, sizeof(*scomph)); |
| scomph->pcomp = 0; |
| scomph->dcomp = 0; |
| } |
| |
| /* append the user-data header */ |
| suh = (struct sndcp_udata_hdr *) msgb_put(fmsg, sizeof(*suh)); |
| suh->npdu_low = sne->tx_npdu_nr & 0xff; |
| suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf; |
| suh->seg_nr = fs->frag_nr % 0xf; |
| |
| /* calculate remaining length to be sent */ |
| len = (fs->msg->data + fs->msg->len) - fs->next_byte; |
| /* how much payload can we actually send via LLC? */ |
| max_payload_len = lle->params.n201_u - (sizeof(*sch) + sizeof(*suh)); |
| if (sch->first) |
| max_payload_len -= sizeof(*scomph); |
| /* check if we're exceeding the max */ |
| if (len > max_payload_len) |
| len = max_payload_len; |
| |
| /* copy the actual fragment data into our fmsg */ |
| data = msgb_put(fmsg, len); |
| memcpy(data, fs->next_byte, len); |
| |
| /* Increment fragment number and data pointer to next fragment */ |
| fs->frag_nr++; |
| fs->next_byte += len; |
| |
| /* determine if we have more fragemnts to send */ |
| if ((fs->msg->data + fs->msg->len) <= fs->next_byte) |
| more = 0; |
| else |
| more = 1; |
| |
| /* set the MORE bit of the SNDCP header accordingly */ |
| sch->more = more; |
| |
| rc = gprs_llc_tx_ui(fmsg, lle->sapi, 0, fs->mmcontext); |
| if (rc < 0) { |
| /* abort in case of error, do not advance frag_nr / next_byte */ |
| msgb_free(fmsg); |
| return rc; |
| } |
| |
| if (!more) { |
| /* we've sent all fragments */ |
| msgb_free(fs->msg); |
| memset(fs, 0, sizeof(*fs)); |
| /* increment NPDU number for next frame */ |
| sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff; |
| return 0; |
| } |
| |
| /* default: more fragments to send */ |
| return 1; |
| } |
| |
| /* Request transmission of a SN-PDU over specified LLC Entity + SAPI */ |
| int sndcp_unitdata_req(struct msgb *msg, struct gprs_llc_lle *lle, uint8_t nsapi, |
| void *mmcontext) |
| { |
| struct gprs_sndcp_entity *sne; |
| struct sndcp_common_hdr *sch; |
| struct sndcp_comp_hdr *scomph; |
| struct sndcp_udata_hdr *suh; |
| struct sndcp_frag_state fs; |
| |
| /* Identifiers from UP: (TLLI, SAPI) + (BVCI, NSEI) */ |
| |
| sne = gprs_sndcp_entity_by_lle(lle, nsapi); |
| if (!sne) { |
| LOGP(DSNDCP, LOGL_ERROR, "Cannot find SNDCP Entity\n"); |
| return -EIO; |
| } |
| |
| /* Check if we need to fragment this N-PDU into multiple SN-PDUs */ |
| if (msg->len > lle->params.n201_u - |
| (sizeof(*sch) + sizeof(*suh) + sizeof(*scomph))) { |
| /* initialize the fragmenter state */ |
| fs.msg = msg; |
| fs.frag_nr = 0; |
| fs.next_byte = msg->data; |
| fs.sne = sne; |
| fs.mmcontext = mmcontext; |
| |
| /* call function to generate and send fragments until all |
| * of the N-PDU has been sent */ |
| while (1) { |
| int rc = sndcp_send_ud_frag(&fs); |
| if (rc == 0) |
| return 0; |
| if (rc < 0) |
| return rc; |
| } |
| /* not reached */ |
| return 0; |
| } |
| |
| /* this is the non-fragmenting case where we only build 1 SN-PDU */ |
| |
| /* prepend the user-data header */ |
| suh = (struct sndcp_udata_hdr *) msgb_push(msg, sizeof(*suh)); |
| suh->npdu_low = sne->tx_npdu_nr & 0xff; |
| suh->npdu_high = (sne->tx_npdu_nr >> 8) & 0xf; |
| suh->seg_nr = 0; |
| sne->tx_npdu_nr = (sne->tx_npdu_nr + 1) % 0xfff; |
| |
| scomph = (struct sndcp_comp_hdr *) msgb_push(msg, sizeof(*scomph)); |
| scomph->pcomp = 0; |
| scomph->dcomp = 0; |
| |
| /* prepend common SNDCP header */ |
| sch = (struct sndcp_common_hdr *) msgb_push(msg, sizeof(*sch)); |
| sch->first = 1; |
| sch->type = 1; |
| sch->nsapi = nsapi; |
| |
| return gprs_llc_tx_ui(msg, lle->sapi, 0, mmcontext); |
| } |
| |
| /* Section 5.1.2.17 LL-UNITDATA.ind */ |
| int sndcp_llunitdata_ind(struct msgb *msg, struct gprs_llc_lle *lle, |
| uint8_t *hdr, uint16_t len) |
| { |
| struct gprs_sndcp_entity *sne; |
| struct sndcp_common_hdr *sch = (struct sndcp_common_hdr *)hdr; |
| struct sndcp_comp_hdr *scomph = NULL; |
| struct sndcp_udata_hdr *suh; |
| uint8_t *npdu; |
| uint16_t npdu_num; |
| int npdu_len; |
| |
| sch = (struct sndcp_common_hdr *) hdr; |
| if (sch->first) { |
| scomph = (struct sndcp_comp_hdr *) (hdr + 1); |
| suh = (struct sndcp_udata_hdr *) (hdr + 1 + sizeof(struct sndcp_common_hdr)); |
| } else |
| suh = (struct sndcp_udata_hdr *) (hdr + sizeof(struct sndcp_common_hdr)); |
| |
| if (sch->type == 0) { |
| LOGP(DSNDCP, LOGL_ERROR, "SN-DATA PDU at unitdata_ind() function\n"); |
| return -EINVAL; |
| } |
| |
| if (len < sizeof(*sch) + sizeof(*suh)) { |
| LOGP(DSNDCP, LOGL_ERROR, "SN-UNITDATA PDU too short (%u)\n", len); |
| return -EIO; |
| } |
| |
| sne = gprs_sndcp_entity_by_lle(lle, sch->nsapi); |
| if (!sne) { |
| LOGP(DSNDCP, LOGL_ERROR, "Message for non-existing SNDCP Entity " |
| "(lle=%p, TLLI=%08x, SAPI=%u, NSAPI=%u)\n", lle, |
| lle->llme->tlli, lle->sapi, sch->nsapi); |
| return -EIO; |
| } |
| /* FIXME: move this RA_ID up to the LLME or even higher */ |
| bssgp_parse_cell_id(&sne->ra_id, msgb_bcid(msg)); |
| |
| /* any non-first segment is by definition something to defragment |
| * as is any segment that tells us there are more segments */ |
| if (!sch->first || sch->more) |
| return defrag_input(sne, msg, hdr, len); |
| |
| if (scomph && (scomph->pcomp || scomph->dcomp)) { |
| LOGP(DSNDCP, LOGL_ERROR, "We don't support compression yet\n"); |
| return -EIO; |
| } |
| |
| npdu_num = (suh->npdu_high << 8) | suh->npdu_low; |
| npdu = (uint8_t *)suh + sizeof(*suh); |
| npdu_len = (msg->data + msg->len) - npdu; |
| if (npdu_len <= 0) { |
| LOGP(DSNDCP, LOGL_ERROR, "Short SNDCP N-PDU: %d\n", npdu_len); |
| return -EIO; |
| } |
| /* actually send the N-PDU to the SGSN core code, which then |
| * hands it off to the correct GTP tunnel + GGSN via gtp_data_req() */ |
| return sgsn_rx_sndcp_ud_ind(&sne->ra_id, lle->llme->tlli, sne->nsapi, msg, npdu_len, npdu); |
| } |
| |
| /* Section 5.1.2.1 LL-RESET.ind */ |
| static int sndcp_ll_reset_ind(struct gprs_sndcp_entity *se) |
| { |
| /* treat all outstanding SNDCP-LLC request type primitives as not sent */ |
| /* reset all SNDCP XID parameters to default values */ |
| } |
| |
| static int sndcp_ll_status_ind() |
| { |
| /* inform the SM sub-layer by means of SNSM-STATUS.req */ |
| } |
| |
| #if 0 |
| static struct sndcp_state_list {{ |
| uint32_t states; |
| unsigned int type; |
| int (*rout)(struct gprs_sndcp_entity *se, struct msgb *msg); |
| } sndcp_state_list[] = { |
| { ALL_STATES, |
| LL_RESET_IND, sndcp_ll_reset_ind }, |
| { ALL_STATES, |
| LL_ESTABLISH_IND, sndcp_ll_est_ind }, |
| { SBIT(SNDCP_S_EST_RQD), |
| LL_ESTABLISH_RESP, sndcp_ll_est_ind }, |
| { SBIT(SNDCP_S_EST_RQD), |
| LL_ESTABLISH_CONF, sndcp_ll_est_conf }, |
| { SBIT(SNDCP_S_ |
| }; |
| |
| static int sndcp_rx_llc_prim() |
| { |
| case LL_ESTABLISH_REQ: |
| case LL_RELEASE_REQ: |
| case LL_XID_REQ: |
| case LL_DATA_REQ: |
| LL_UNITDATA_REQ, /* TLLI, SN-PDU, Ref, QoS, Radio Prio, Ciph */ |
| |
| switch (prim) { |
| case LL_RESET_IND: |
| case LL_ESTABLISH_IND: |
| case LL_ESTABLISH_RESP: |
| case LL_ESTABLISH_CONF: |
| case LL_RELEASE_IND: |
| case LL_RELEASE_CONF: |
| case LL_XID_IND: |
| case LL_XID_RESP: |
| case LL_XID_CONF: |
| case LL_DATA_IND: |
| case LL_DATA_CONF: |
| case LL_UNITDATA_IND: |
| case LL_STATUS_IND: |
| } |
| #endif |