/* * (C) 2013 by Andreas Eversberg * 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 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 . * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../../bscconfig.h" void *ctx; struct gsm_network *bsc_gsmnet; /* override, requires '-Wl,--wrap=osmo_mgcpc_ep_ci_request'. * Catch modification of an MGCP connection. */ void __real_osmo_mgcpc_ep_ci_request(struct osmo_mgcpc_ep_ci *ci, enum mgcp_verb verb, const struct mgcp_conn_peer *verb_info, struct osmo_fsm_inst *notify, uint32_t event_success, uint32_t event_failure, void *notify_data); void __wrap_osmo_mgcpc_ep_ci_request(struct osmo_mgcpc_ep_ci *ci, enum mgcp_verb verb, const struct mgcp_conn_peer *verb_info, struct osmo_fsm_inst *notify, uint32_t event_success, uint32_t event_failure, void *notify_data) { struct mgcp_conn_peer fake_data = {}; /* All MGCP shall be successful */ if (!notify) return; osmo_fsm_inst_dispatch(notify, event_success, &fake_data); } /* measurement report */ uint8_t meas_rep_ba = 0, meas_rep_valid = 1, meas_valid = 1, meas_multi_rep = 0; uint8_t meas_ul_rxlev = 0, meas_ul_rxqual = 0; uint8_t meas_tx_power_ms = 0, meas_tx_power_bs = 0; uint8_t meas_dtx_ms = 0, meas_dtx_bs = 0, meas_nr = 0; char *codec_tch_f = NULL; char *codec_tch_h = NULL; struct neighbor_meas { uint8_t rxlev; uint8_t bsic; uint8_t bcch_f; }; static void gen_meas_rep(struct gsm_lchan *lchan, uint8_t rxlev, uint8_t rxqual, uint8_t ta, int neighbors_count, struct neighbor_meas *neighbors) { struct msgb *msg = msgb_alloc_headroom(256, 64, "RSL"); struct abis_rsl_dchan_hdr *dh; uint8_t chan_nr = gsm_lchan2chan_nr(lchan); uint8_t ulm[3], l1i[2], *buf; struct gsm48_hdr *gh; struct gsm48_meas_res *mr; dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN; dh->c.msg_type = RSL_MT_MEAS_RES; dh->ie_chan = RSL_IE_CHAN_NR; dh->chan_nr = chan_nr; msgb_tv_put(msg, RSL_IE_MEAS_RES_NR, meas_nr++); ulm[0] = meas_ul_rxlev | (meas_dtx_bs << 7); ulm[1] = meas_ul_rxlev; ulm[2] = (meas_ul_rxqual << 3) | meas_ul_rxqual; msgb_tlv_put(msg, RSL_IE_UPLINK_MEAS, sizeof(ulm), ulm); msgb_tv_put(msg, RSL_IE_BS_POWER, meas_tx_power_bs); l1i[0] = 0; l1i[1] = ta; msgb_tv_fixed_put(msg, RSL_IE_L1_INFO, sizeof(l1i), l1i); buf = msgb_put(msg, 3); buf[0] = RSL_IE_L3_INFO; buf[1] = (sizeof(*gh) + sizeof(*mr)) >> 8; buf[2] = (sizeof(*gh) + sizeof(*mr)) & 0xff; gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); mr = (struct gsm48_meas_res *) msgb_put(msg, sizeof(*mr)); gh->proto_discr = GSM48_PDISC_RR; gh->msg_type = GSM48_MT_RR_MEAS_REP; /* measurement results */ mr->rxlev_full = rxlev; mr->rxlev_sub = rxlev; mr->rxqual_full = rxqual; mr->rxqual_sub = rxqual; mr->dtx_used = meas_dtx_ms; mr->ba_used = meas_rep_ba; mr->meas_valid = 0; /* 0 = valid */ mr->no_nc_n_hi = neighbors_count >> 2; mr->no_nc_n_lo = neighbors_count & 3; mr->rxlev_nc1 = neighbors[0].rxlev; mr->rxlev_nc2_hi = neighbors[1].rxlev >> 1; mr->rxlev_nc2_lo = neighbors[1].rxlev & 1; mr->rxlev_nc3_hi = neighbors[2].rxlev >> 2; mr->rxlev_nc3_lo = neighbors[2].rxlev & 3; mr->rxlev_nc4_hi = neighbors[3].rxlev >> 3; mr->rxlev_nc4_lo = neighbors[3].rxlev & 7; mr->rxlev_nc5_hi = neighbors[4].rxlev >> 4; mr->rxlev_nc5_lo = neighbors[4].rxlev & 15; mr->rxlev_nc6_hi = neighbors[5].rxlev >> 5; mr->rxlev_nc6_lo = neighbors[5].rxlev & 31; mr->bsic_nc1_hi = neighbors[0].bsic >> 3; mr->bsic_nc1_lo = neighbors[0].bsic & 7; mr->bsic_nc2_hi = neighbors[1].bsic >> 4; mr->bsic_nc2_lo = neighbors[1].bsic & 15; mr->bsic_nc3_hi = neighbors[2].bsic >> 5; mr->bsic_nc3_lo = neighbors[2].bsic & 31; mr->bsic_nc4 = neighbors[3].bsic; mr->bsic_nc5 = neighbors[4].bsic; mr->bsic_nc6 = neighbors[5].bsic; mr->bcch_f_nc1 = neighbors[0].bcch_f; mr->bcch_f_nc2 = neighbors[1].bcch_f; mr->bcch_f_nc3 = neighbors[2].bcch_f; mr->bcch_f_nc4 = neighbors[3].bcch_f; mr->bcch_f_nc5_hi = neighbors[4].bcch_f >> 1; mr->bcch_f_nc5_lo = neighbors[4].bcch_f & 1; mr->bcch_f_nc6_hi = neighbors[5].bcch_f >> 2; mr->bcch_f_nc6_lo = neighbors[5].bcch_f & 3; msg->dst = lchan->ts->trx->bts->c0->rsl_link; msg->l2h = (unsigned char *)dh; msg->l3h = (unsigned char *)gh; abis_rsl_rcvmsg(msg); } enum gsm_phys_chan_config pchan_from_str(const char *str) { enum gsm_phys_chan_config pchan; if (!strcmp(str, "dyn")) return GSM_PCHAN_TCH_F_TCH_H_PDCH; if (!strcmp(str, "c+s4")) return GSM_PCHAN_CCCH_SDCCH4; if (!strcmp(str, "-")) return GSM_PCHAN_NONE; pchan = gsm_pchan_parse(str); if (pchan < 0) { fprintf(stderr, "Invalid timeslot pchan type: %s\n", str); exit(1); } return pchan; } const char * const bts_default_ts[] = { "c+s4", "TCH/F", "TCH/F", "TCH/F", "TCH/F", "TCH/H", "TCH/H", "-", }; static struct gsm_bts *_create_bts(int num_trx, const char * const *ts_args, int ts_args_count) { static int arfcn = 870; struct gsm_bts *bts; struct e1inp_sign_link *rsl_link; int i; int trx_i; struct gsm_bts_trx *trx; fprintf(stderr, "- Creating BTS %d, %d TRX\n", bsc_gsmnet->num_bts, num_trx); bts = bsc_bts_alloc_register(bsc_gsmnet, GSM_BTS_TYPE_UNKNOWN, 0x3f); if (!bts) { fprintf(stderr, "No resource for bts1\n"); return NULL; } bts->location_area_code = 23; bts->c0->arfcn = arfcn++; bts->codec.efr = 1; bts->codec.hr = 1; bts->codec.amr = 1; rsl_link = talloc_zero(ctx, struct e1inp_sign_link); rsl_link->trx = bts->c0; bts->c0->rsl_link = rsl_link; for (trx_i = 0; trx_i < num_trx; trx_i++) { while (!(trx = gsm_bts_trx_num(bts, trx_i))) gsm_bts_trx_alloc(bts); trx->mo.nm_state.operational = NM_OPSTATE_ENABLED; trx->mo.nm_state.availability = NM_AVSTATE_OK; trx->mo.nm_state.administrative = NM_STATE_UNLOCKED; trx->bb_transc.mo.nm_state.operational = NM_OPSTATE_ENABLED; trx->bb_transc.mo.nm_state.availability = NM_AVSTATE_OK; trx->bb_transc.mo.nm_state.administrative = NM_STATE_UNLOCKED; /* 4 full rate and 4 half rate channels */ for (i = 0; i < 8; i++) { int arg_i = trx_i * 8 + i; const char *ts_arg; if (arg_i >= ts_args_count) ts_arg = bts_default_ts[i]; else ts_arg = ts_args[arg_i]; fprintf(stderr, "\t%s", ts_arg); trx->ts[i].pchan_from_config = pchan_from_str(ts_arg); if (trx->ts[i].pchan_from_config == GSM_PCHAN_NONE) continue; trx->ts[i].mo.nm_state.operational = NM_OPSTATE_ENABLED; trx->ts[i].mo.nm_state.availability = NM_AVSTATE_OK; trx->ts[i].mo.nm_state.administrative = NM_STATE_UNLOCKED; } fprintf(stderr, "\n"); for (i = 0; i < ARRAY_SIZE(trx->ts); i++) { /* make sure ts->lchans[] get initialized */ osmo_fsm_inst_dispatch(trx->ts[i].fi, TS_EV_RSL_READY, 0); osmo_fsm_inst_dispatch(trx->ts[i].fi, TS_EV_OML_READY, 0); /* Unused dyn TS start out as used for PDCH */ switch (trx->ts[i].pchan_on_init) { case GSM_PCHAN_TCH_F_TCH_H_PDCH: case GSM_PCHAN_TCH_F_PDCH: trx->ts[i].pchan_is = GSM_PCHAN_PDCH; break; default: break; } } } for (i = 0; i < bsc_gsmnet->num_bts; i++) { if (gsm_generate_si(gsm_bts_num(bsc_gsmnet, i), SYSINFO_TYPE_2) <= 0) fprintf(stderr, "Error generating SI2\n"); } return bts; } const char *ts_use_str(struct gsm_bts_trx_ts *ts) { switch (ts->pchan_is) { case GSM_PCHAN_CCCH_SDCCH4: return "c+s4"; case GSM_PCHAN_NONE: return "-"; case GSM_PCHAN_TCH_F: if (lchan_state_is(&ts->lchan[0], LCHAN_ST_ESTABLISHED)) return "TCH/F"; else return "-"; case GSM_PCHAN_TCH_H: if (lchan_state_is(&ts->lchan[0], LCHAN_ST_ESTABLISHED) && lchan_state_is(&ts->lchan[1], LCHAN_ST_ESTABLISHED)) return "TCH/HH"; if (lchan_state_is(&ts->lchan[0], LCHAN_ST_ESTABLISHED)) return "TCH/H-"; if (lchan_state_is(&ts->lchan[1], LCHAN_ST_ESTABLISHED)) return "TCH/-H"; return "-"; default: return gsm_pchan_name(ts->pchan_is); } } bool _expect_ts_use(struct gsm_bts *bts, struct gsm_bts_trx *trx, const char * const *ts_use) { int i; int mismatching_ts = -1; fprintf(stderr, "bts %d trx %d: expect:", bts->nr, trx->nr); for (i = 0; i < 8; i++) fprintf(stderr, "\t%s", ts_use[i]); fprintf(stderr, "\nbts %d trx %d: got:", bts->nr, trx->nr); for (i = 0; i < 8; i++) { struct gsm_bts_trx_ts *ts = &trx->ts[i]; const char *use = ts_use_str(ts); fprintf(stderr, "\t%s", use); if (!strcmp(ts_use[i], "*")) continue; if (strcasecmp(ts_use[i], use) && mismatching_ts < 0) mismatching_ts = i; } fprintf(stderr, "\n"); if (mismatching_ts >= 0) { fprintf(stderr, "Test failed: mismatching TS use in bts %d trx %d ts %d\n", bts->nr, trx->nr, mismatching_ts); return false; } return true; } void create_conn(struct gsm_lchan *lchan) { static unsigned int next_imsi = 0; char imsi[sizeof(lchan->conn->bsub->imsi)]; struct gsm_network *net = lchan->ts->trx->bts->network; struct gsm_subscriber_connection *conn; struct mgcp_client *fake_mgcp_client = (void*)talloc_zero(net, int); conn = bsc_subscr_con_allocate(net); conn->user_plane.mgw_endpoint = osmo_mgcpc_ep_alloc(conn->fi, GSCON_EV_FORGET_MGW_ENDPOINT, fake_mgcp_client, net->mgw.tdefs, "test", "fake endpoint"); conn->sccp.msc = osmo_msc_data_alloc(net, 0); lchan->conn = conn; conn->lchan = lchan; /* Make up a new IMSI for this test, for logging the subscriber */ next_imsi ++; snprintf(imsi, sizeof(imsi), "%06u", next_imsi); lchan->conn->bsub = bsc_subscr_find_or_create_by_imsi(net->bsc_subscribers, imsi, BSUB_USE_CONN); /* kick the FSM from INIT through to the ACTIVE state */ osmo_fsm_inst_dispatch(conn->fi, GSCON_EV_MO_COMPL_L3, NULL); osmo_fsm_inst_dispatch(conn->fi, GSCON_EV_A_CONN_CFM, NULL); } struct gsm_lchan *lchan_act(struct gsm_lchan *lchan, int full_rate, const char *codec) { /* serious hack into osmo_fsm */ lchan->fi->state = LCHAN_ST_ESTABLISHED; lchan->ts->fi->state = TS_ST_IN_USE; lchan->type = full_rate ? GSM_LCHAN_TCH_F : GSM_LCHAN_TCH_H; if (lchan->ts->pchan_on_init == GSM_PCHAN_TCH_F_TCH_H_PDCH) lchan->ts->pchan_is = full_rate ? GSM_PCHAN_TCH_F : GSM_PCHAN_TCH_H; if (lchan->ts->pchan_on_init == GSM_PCHAN_TCH_F_PDCH) { OSMO_ASSERT(full_rate); lchan->ts->pchan_is = GSM_PCHAN_TCH_F; } LOG_LCHAN(lchan, LOGL_DEBUG, "activated by handover_test.c\n"); create_conn(lchan); if (!strcasecmp(codec, "FR") && full_rate) lchan->tch_mode = GSM48_CMODE_SPEECH_V1; else if (!strcasecmp(codec, "HR") && !full_rate) lchan->tch_mode = GSM48_CMODE_SPEECH_V1; else if (!strcasecmp(codec, "EFR") && full_rate) lchan->tch_mode = GSM48_CMODE_SPEECH_EFR; else if (!strcasecmp(codec, "AMR")) { lchan->tch_mode = GSM48_CMODE_SPEECH_AMR; lchan->activate.info.s15_s0 = 0x0002; } else { fprintf(stderr, "Given codec unknown\n"); exit(EXIT_FAILURE); } lchan->conn->codec_list = (struct gsm0808_speech_codec_list){ .codec = { { .fi=true, .type=GSM0808_SCT_FR1, }, { .fi=true, .type=GSM0808_SCT_FR2, }, { .fi=true, .type=GSM0808_SCT_FR3, }, { .fi=true, .type=GSM0808_SCT_HR1, }, { .fi=true, .type=GSM0808_SCT_HR3, }, }, .len = 5, }; return lchan; } struct gsm_lchan *create_lchan(struct gsm_bts *bts, int full_rate, const char *codec) { struct gsm_lchan *lchan; lchan = lchan_select_by_type(bts, (full_rate) ? GSM_LCHAN_TCH_F : GSM_LCHAN_TCH_H); if (!lchan) { fprintf(stderr, "No resource for lchan\n"); exit(EXIT_FAILURE); } return lchan_act(lchan, full_rate, codec); } static void lchan_clear(struct gsm_lchan *lchan) { lchan_release(lchan, true, false, 0); } static void ts_clear(struct gsm_bts_trx_ts *ts) { struct gsm_lchan *lchan; ts_for_each_lchan(lchan, ts) { if (lchan_state_is(lchan, LCHAN_ST_UNUSED)) continue; lchan_clear(lchan); } } bool _set_ts_use(struct gsm_bts *bts, struct gsm_bts_trx *trx, const char * const *ts_use) { int i; fprintf(stderr, "Setting TS use:"); for (i = 0; i < 8; i++) fprintf(stderr, "\t%s", ts_use[i]); fprintf(stderr, "\n"); for (i = 0; i < 8; i++) { struct gsm_bts_trx_ts *ts = &trx->ts[i]; const char *want_use = ts_use[i]; const char *is_use = ts_use_str(ts); if (!strcmp(want_use, "*")) continue; /* If it is already as desired, don't change anything */ if (!strcasecmp(want_use, is_use)) continue; if (!strcasecmp(want_use, "tch/f")) { if (!ts_is_capable_of_pchan(ts, GSM_PCHAN_TCH_F)) { fprintf(stderr, "Error: bts %d trx %d ts %d cannot be used as TCH/F\n", bts->nr, trx->nr, i); return false; } ts_clear(ts); lchan_act(&ts->lchan[0], true, codec_tch_f ? : "AMR"); } else if (!strcasecmp(want_use, "tch/h-") || !strcasecmp(want_use, "tch/hh") || !strcasecmp(want_use, "tch/-h")) { bool act[2]; int j; if (!ts_is_capable_of_pchan(ts, GSM_PCHAN_TCH_H)) { fprintf(stderr, "Error: bts %d trx %d ts %d cannot be used as TCH/H\n", bts->nr, trx->nr, i); return false; } if (ts->pchan_is != GSM_PCHAN_TCH_H) ts_clear(ts); act[0] = (want_use[4] == 'h' || want_use[4] == 'H'); act[1] = (want_use[5] == 'h' || want_use[5] == 'H'); for (j = 0; j < 2; j++) { if (lchan_state_is(&ts->lchan[j], LCHAN_ST_UNUSED)) { if (act[j]) lchan_act(&ts->lchan[j], false, codec_tch_h ? : "AMR"); } else if (!act[j]) lchan_clear(&ts->lchan[j]); } } else if (!strcmp(want_use, "-") || !strcasecmp(want_use, "PDCH")) { ts_clear(ts); } } return true; } /* parse channel request */ static int got_chan_req = 0; static struct gsm_lchan *chan_req_lchan = NULL; static int parse_chan_act(struct gsm_lchan *lchan, uint8_t *data) { chan_req_lchan = lchan; return 0; } static int parse_chan_rel(struct gsm_lchan *lchan, uint8_t *data) { chan_req_lchan = lchan; return 0; } /* parse handover request */ static int got_ho_req = 0; static struct gsm_lchan *ho_req_lchan = NULL; static int parse_ho_command(struct gsm_lchan *lchan, uint8_t *data, int len) { struct gsm48_hdr *gh = (struct gsm48_hdr *) data; struct gsm48_ho_cmd *ho = (struct gsm48_ho_cmd *) gh->data; int arfcn; struct gsm_bts *neigh; switch (gh->msg_type) { case GSM48_MT_RR_HANDO_CMD: arfcn = (ho->cell_desc.arfcn_hi << 8) | ho->cell_desc.arfcn_lo; /* look up trx. since every dummy bts uses different arfcn and * only one trx, it is simple */ llist_for_each_entry(neigh, &bsc_gsmnet->bts_list, list) { if (neigh->c0->arfcn != arfcn) continue; ho_req_lchan = lchan; return 0; } break; case GSM48_MT_RR_ASS_CMD: ho_req_lchan = lchan; return 0; break; default: fprintf(stderr, "Error, expecting HO or AS command\n"); return -EINVAL; } return -1; } /* send channel activation ack */ static void send_chan_act_ack(struct gsm_lchan *lchan, int act) { struct msgb *msg = msgb_alloc_headroom(256, 64, "RSL"); struct abis_rsl_dchan_hdr *dh; dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN; dh->c.msg_type = (act) ? RSL_MT_CHAN_ACTIV_ACK : RSL_MT_RF_CHAN_REL_ACK; dh->ie_chan = RSL_IE_CHAN_NR; dh->chan_nr = gsm_lchan2chan_nr(lchan); msg->dst = lchan->ts->trx->bts->c0->rsl_link; msg->l2h = (unsigned char *)dh; abis_rsl_rcvmsg(msg); } /* Send RLL Est Ind for SAPI[0] */ static void send_est_ind(struct gsm_lchan *lchan) { struct msgb *msg = msgb_alloc_headroom(256, 64, "RSL"); struct abis_rsl_rll_hdr *rh; uint8_t chan_nr = gsm_lchan2chan_nr(lchan); fprintf(stderr, "- Send EST IND for %s\n", gsm_lchan_name(lchan)); rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); rh->c.msg_discr = ABIS_RSL_MDISC_RLL; rh->c.msg_type = RSL_MT_EST_IND; rh->ie_chan = RSL_IE_CHAN_NR; rh->chan_nr = chan_nr; rh->ie_link_id = RSL_IE_LINK_IDENT; rh->link_id = 0x00; msg->dst = lchan->ts->trx->bts->c0->rsl_link; msg->l2h = (unsigned char *)rh; abis_rsl_rcvmsg(msg); } static void send_ho_detect(struct gsm_lchan *lchan) { struct msgb *msg = msgb_alloc_headroom(256, 64, "RSL"); struct abis_rsl_rll_hdr *rh; uint8_t chan_nr = gsm_lchan2chan_nr(lchan); fprintf(stderr, "- Send HO DETECT for %s\n", gsm_lchan_name(lchan)); rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); rh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN; rh->c.msg_type = RSL_MT_HANDO_DET; rh->ie_chan = RSL_IE_CHAN_NR; rh->chan_nr = chan_nr; rh->ie_link_id = RSL_IE_LINK_IDENT; rh->link_id = 0x00; msg->dst = lchan->ts->trx->bts->c0->rsl_link; msg->l2h = (unsigned char *)rh; abis_rsl_rcvmsg(msg); send_est_ind(lchan); osmo_fsm_inst_dispatch(lchan->fi, LCHAN_EV_RTP_READY, 0); } static void send_ho_complete(struct gsm_lchan *lchan, bool success) { struct msgb *msg = msgb_alloc_headroom(256, 64, "RSL"); struct abis_rsl_rll_hdr *rh; uint8_t chan_nr = gsm_lchan2chan_nr(lchan); uint8_t *buf; struct gsm48_hdr *gh; struct gsm48_ho_cpl *hc; if (success) fprintf(stderr, "- Send HO COMPLETE for %s\n", gsm_lchan_name(lchan)); else fprintf(stderr, "- Send HO FAIL to %s\n", gsm_lchan_name(lchan)); rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); rh->c.msg_discr = ABIS_RSL_MDISC_RLL; rh->c.msg_type = RSL_MT_DATA_IND; rh->ie_chan = RSL_IE_CHAN_NR; rh->chan_nr = chan_nr; rh->ie_link_id = RSL_IE_LINK_IDENT; rh->link_id = 0x00; buf = msgb_put(msg, 3); buf[0] = RSL_IE_L3_INFO; buf[1] = (sizeof(*gh) + sizeof(*hc)) >> 8; buf[2] = (sizeof(*gh) + sizeof(*hc)) & 0xff; gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); hc = (struct gsm48_ho_cpl *) msgb_put(msg, sizeof(*hc)); gh->proto_discr = GSM48_PDISC_RR; gh->msg_type = success ? GSM48_MT_RR_HANDO_COMPL : GSM48_MT_RR_HANDO_FAIL; msg->dst = lchan->ts->trx->bts->c0->rsl_link; msg->l2h = (unsigned char *)rh; msg->l3h = (unsigned char *)gh; abis_rsl_rcvmsg(msg); } static void lchan_release_ack(struct gsm_lchan *lchan) { if (lchan->fi && lchan->fi->state == LCHAN_ST_WAIT_BEFORE_RF_RELEASE) { /* don't wait before release */ osmo_fsm_inst_state_chg(lchan->fi, LCHAN_ST_WAIT_RF_RELEASE_ACK, 0, 0); /* ack the release */ osmo_fsm_inst_dispatch(lchan->fi, LCHAN_EV_RSL_RF_CHAN_REL_ACK, 0); } } /* override, requires '-Wl,--wrap=abis_rsl_sendmsg'. * Catch RSL messages sent towards the BTS. */ int __real_abis_rsl_sendmsg(struct msgb *msg); int __wrap_abis_rsl_sendmsg(struct msgb *msg) { struct abis_rsl_dchan_hdr *dh = (struct abis_rsl_dchan_hdr *) msg->data; struct e1inp_sign_link *sign_link = msg->dst; int rc; struct gsm_lchan *lchan = rsl_lchan_lookup(sign_link->trx, dh->chan_nr, &rc); struct gsm_lchan *other_lchan; if (rc) { fprintf(stderr, "rsl_lchan_lookup() failed\n"); exit(1); } switch (dh->c.msg_type) { case RSL_MT_CHAN_ACTIV: rc = parse_chan_act(lchan, dh->data); if (rc == 0) got_chan_req = 1; break; case RSL_MT_RF_CHAN_REL: rc = parse_chan_rel(lchan, dh->data); if (rc == 0) send_chan_act_ack(chan_req_lchan, 0); /* send dyn TS back to PDCH if unused */ switch (chan_req_lchan->ts->pchan_on_init) { case GSM_PCHAN_TCH_F_TCH_H_PDCH: case GSM_PCHAN_TCH_F_PDCH: switch (chan_req_lchan->ts->pchan_is) { case GSM_PCHAN_TCH_H: other_lchan = &chan_req_lchan->ts->lchan[ (chan_req_lchan == &chan_req_lchan->ts->lchan[0])? 1 : 0]; if (lchan_state_is(other_lchan, LCHAN_ST_ESTABLISHED)) break; /* else fall thru */ case GSM_PCHAN_TCH_F: chan_req_lchan->ts->pchan_is = GSM_PCHAN_PDCH; break; default: break; } break; default: break; } break; case RSL_MT_DATA_REQ: rc = parse_ho_command(lchan, msg->l3h, msgb_l3len(msg)); if (rc == 0) got_ho_req = 1; break; case RSL_MT_IPAC_CRCX: break; case RSL_MT_DEACTIVATE_SACCH: break; default: fprintf(stderr, "unknown rsl message=0x%x\n", dh->c.msg_type); } return 0; } struct gsm_bts *bts_by_num_str(const char *num_str) { struct gsm_bts *bts = gsm_bts_num(bsc_gsmnet, atoi(num_str)); OSMO_ASSERT(bts); return bts; } struct gsm_bts_trx *trx_by_num_str(struct gsm_bts *bts, const char *num_str) { struct gsm_bts_trx *trx = gsm_bts_trx_num(bts, atoi(num_str)); OSMO_ASSERT(trx); return trx; } #define LCHAN_ARGS "lchan <0-255> <0-255> <0-7> <0-7>" #define LCHAN_ARGS_DOC "identify an lchan\nBTS nr\nTRX nr\nTimeslot nr\nSubslot nr\n" static struct gsm_lchan *parse_lchan_args(const char **argv) { struct gsm_bts *bts = bts_by_num_str(argv[0]); struct gsm_bts_trx *trx = trx_by_num_str(bts, argv[1]); struct gsm_bts_trx_ts *ts = &trx->ts[atoi(argv[2])]; return &ts->lchan[atoi(argv[3])]; } #define TS_USE " (TCH/F|TCH/H-|TCH/-H|TCH/HH|PDCH" \ "|tch/f|tch/h-|tch/-h|tch/hh|pdch" \ "|-|*)" #define TS_USE_DOC "'TCH/F': one FR call\n" \ "'TCH/H-': HR TS with first subslot used as TCH/H, other subslot unused\n" \ "'TCH/HH': HR TS with both subslots used as TCH/H\n" \ "'TCH/-H': HR TS with only second subslot used as TCH/H\n" \ "'PDCH': TS used for PDCH (e.g. unused dynamic TS)\n" \ "'tch/f': one FR call\n" \ "'tch/h-': HR TS with first subslot used as TCH/H, other subslot unused\n" \ "'tch/hh': HR TS with both subslots used as TCH/H\n" \ "'tch/-h': HR TS with only second subslot used as TCH/H\n" \ "'pdch': TS used for PDCH (e.g. unused dynamic TS)\n" \ "'-': TS unused\n" \ "'*': TS allowed to be in any state\n" DEFUN(create_n_bts, create_n_bts_cmd, "create-n-bts <1-255>", "Create a number of BTS with four TCH/F and four TCH/H timeslots\n" "Number of BTS to create\n") { int i; int n = atoi(argv[0]); for (i = 0; i < n; i++) _create_bts(1, NULL, 0); return CMD_SUCCESS; } DEFUN(create_bts, create_bts_cmd, "create-bts trx-count <1-255> timeslots .TS_CFG", "Create a new BTS with specific timeslot configuration\n" "Create N TRX in the new BTS\n" "TRX count\n" "Timeslot config\n" "Timeslot types for 8 * trx-count, each being one of CCCH+SDCCH4|SDCCH8|TCH/F|TCH/H|TCH/F_TCH/H_PDCH|...;" " shorthands: cs+4 = CCCH+SDCCH4; dyn = TCH/F_TCH/H_PDCH\n") { int num_trx = atoi(argv[0]); _create_bts(num_trx, argv + 1, argc - 1); return CMD_SUCCESS; } DEFUN(create_ms, create_ms_cmd, "create-ms bts <0-999> (TCH/F|TCH/H) (AMR|HR|EFR)", "Create an MS using the next free matching lchan on a given BTS\n" "BTS index to subscribe on\n" "lchan type to select\n" "codec\n") { const char *bts_nr_str = argv[0]; const char *tch_type = argv[1]; const char *codec = argv[2]; struct gsm_lchan *lchan; fprintf(stderr, "- Creating mobile at BTS %s on " "%s with %s codec\n", bts_nr_str, tch_type, codec); lchan = create_lchan(bts_by_num_str(bts_nr_str), !strcmp(tch_type, "TCH/F"), codec); if (!lchan) { fprintf(stderr, "Failed to create lchan!\n"); return CMD_WARNING; } fprintf(stderr, " * New MS is at %s\n", gsm_lchan_name(lchan)); return CMD_SUCCESS; } DEFUN(meas_rep, meas_rep_cmd, "meas-rep " LCHAN_ARGS " rxlev <0-255> rxqual <0-7> ta <0-255>" " [neighbors] [<0-255>] [<0-255>] [<0-255>] [<0-255>] [<0-255>] [<0-255>]", "Send measurement report\n" LCHAN_ARGS_DOC "rxlev\nrxlev\n" "rxqual\nrxqual\n" "timing advance\ntiming advance\n" "neighbors list of rxlev reported by each neighbor cell\n" "neighbor 0 rxlev\n" "neighbor 1 rxlev\n" "neighbor 2 rxlev\n" "neighbor 3 rxlev\n" "neighbor 4 rxlev\n" "neighbor 5 rxlev\n" ) { struct gsm_lchan *lc; uint8_t rxlev; uint8_t rxqual; uint8_t ta; int i; struct neighbor_meas nm[6] = {}; lc = parse_lchan_args(argv); argv += 4; argc -= 4; rxlev = atoi(argv[0]); rxqual = atoi(argv[1]); ta = atoi(argv[2]); argv += 3; argc -= 3; if (!lchan_state_is(lc, LCHAN_ST_ESTABLISHED)) { fprintf(stderr, "Error: sending measurement report for %s which is in state %s\n", gsm_lchan_name(lc), lchan_state_name(lc)); exit(1); } /* skip the optional [neighbors] keyword */ if (argc) { argv++; argc--; } fprintf(stderr, "- Sending measurement report from %s: rxlev=%u rxqual=%u ta=%u (%d neighbors)\n", gsm_lchan_name(lc), rxlev, rxqual, ta, argc); for (i = 0; i < 6; i++) { int neighbor_bts_nr = i; /* since our bts is not in the list of neighbor cells, we need to shift */ if (neighbor_bts_nr >= lc->ts->trx->bts->nr) neighbor_bts_nr++; nm[i] = (struct neighbor_meas){ .rxlev = argc > i ? atoi(argv[i]) : 0, .bsic = 0x3f, .bcch_f = i, }; if (i < argc) fprintf(stderr, " * Neighbor cell #%d, actual BTS %d: rxlev=%d\n", i, neighbor_bts_nr, nm[i].rxlev); } got_chan_req = 0; gen_meas_rep(lc, rxlev, rxqual, ta, argc, nm); return CMD_SUCCESS; } DEFUN(congestion_check, congestion_check_cmd, "congestion-check", "Trigger a congestion check\n") { fprintf(stderr, "- Triggering congestion check\n"); got_chan_req = 0; hodec2_congestion_check(bsc_gsmnet); return CMD_SUCCESS; } DEFUN(expect_no_chan, expect_no_chan_cmd, "expect-no-chan", "Expect that no channel request was sent from BSC to any cell\n") { fprintf(stderr, "- Expecting no channel request\n"); if (got_chan_req) { fprintf(stderr, " * Got channel request at %s\n", gsm_lchan_name(chan_req_lchan)); fprintf(stderr, "Test failed, because channel was requested\n"); exit(1); } fprintf(stderr, " * Got no channel request\n"); return CMD_SUCCESS; } static void _expect_chan_activ(struct gsm_lchan *lchan) { fprintf(stderr, "- Expecting channel request at %s\n", gsm_lchan_name(lchan)); if (!got_chan_req) { fprintf(stderr, "Test failed, because no channel was requested\n"); exit(1); } fprintf(stderr, " * Got channel request at %s\n", gsm_lchan_name(chan_req_lchan)); if (lchan != chan_req_lchan) { fprintf(stderr, "Test failed, because channel was requested on a different lchan than expected\n" "expected: %s got: %s\n", gsm_lchan_name(lchan), gsm_lchan_name(chan_req_lchan)); exit(1); } } static void _ack_chan_activ(struct gsm_lchan *lchan) { fprintf(stderr, "- Acknowledging channel request on %s\n", gsm_lchan_name(lchan)); got_ho_req = 0; send_chan_act_ack(lchan, 1); } static void _expect_ho_req(struct gsm_lchan *lchan) { fprintf(stderr, "- Expecting handover/assignment request at %s\n", gsm_lchan_name(lchan)); if (!got_ho_req) { fprintf(stderr, "Test failed, because no handover was requested\n"); exit(1); } fprintf(stderr, " * Got handover/assignment request at %s\n", gsm_lchan_name(ho_req_lchan)); if (ho_req_lchan != lchan) { fprintf(stderr, "Test failed, because handover/assignment was not commanded on the expected lchan\n"); exit(1); } } DEFUN(expect_chan, expect_chan_cmd, "expect-chan " LCHAN_ARGS, "Expect a channel request from BSC to a cell for a specific lchan\n" LCHAN_ARGS_DOC) { _expect_chan_activ(parse_lchan_args(argv)); return CMD_SUCCESS; } DEFUN(ack_chan, ack_chan_cmd, "ack-chan", "ACK a previous Channel Request\n") { OSMO_ASSERT(got_chan_req); _ack_chan_activ(chan_req_lchan); return CMD_SUCCESS; } DEFUN(expect_ho_req, expect_ho_req_cmd, "expect-ho-req " LCHAN_ARGS, "Expect a handover of a given lchan\n" LCHAN_ARGS_DOC) { _expect_ho_req(parse_lchan_args(argv)); return CMD_SUCCESS; } DEFUN(ho_detection, ho_detection_cmd, "ho-detect", "Send Handover Detection to the most recent HO target lchan\n") { if (!got_chan_req) { fprintf(stderr, "Cannot ack handover/assignment, because no chan request\n"); exit(1); } if (!got_ho_req) { fprintf(stderr, "Cannot ack handover/assignment, because no ho request\n"); exit(1); } send_ho_detect(chan_req_lchan); return CMD_SUCCESS; } DEFUN(ho_complete, ho_complete_cmd, "ho-complete", "Send Handover Complete for the most recent HO target lchan\n") { if (!got_chan_req) { fprintf(stderr, "Cannot ack handover/assignment, because no chan request\n"); exit(1); } if (!got_ho_req) { fprintf(stderr, "Cannot ack handover/assignment, because no ho request\n"); exit(1); } send_ho_complete(chan_req_lchan, true); lchan_release_ack(ho_req_lchan); return CMD_SUCCESS; } DEFUN(expect_ho, expect_ho_cmd, "expect-ho from " LCHAN_ARGS " to " LCHAN_ARGS, "Expect a handover of a specific lchan to a specific target lchan;" " shorthand for expect-chan, ack-chan, expect-ho, ho-complete.\n" "lchan to handover from\n" LCHAN_ARGS_DOC "lchan that to handover to\n" LCHAN_ARGS_DOC) { struct gsm_lchan *from = parse_lchan_args(argv); struct gsm_lchan *to = parse_lchan_args(argv+4); _expect_chan_activ(to); _ack_chan_activ(to); _expect_ho_req(from); send_ho_detect(to); send_ho_complete(to, true); lchan_release_ack(from); return CMD_SUCCESS; } DEFUN(ho_failed, ho_failed_cmd, "ho-failed", "Fail the most recent handover request\n") { if (!got_chan_req) { fprintf(stderr, "Cannot fail handover, because no chan request\n"); exit(1); } got_chan_req = 0; got_ho_req = 0; send_ho_complete(ho_req_lchan, false); lchan_release_ack(chan_req_lchan); return CMD_SUCCESS; } DEFUN(expect_ts_use, expect_ts_use_cmd, "expect-ts-use trx <0-255> <0-255> states" TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE, "Expect timeslots of a BTS' TRX to be in a specific state\n" "Indicate a BTS and TRX\n" "BTS nr\n" "TRX nr\n" "List of 8 expected TS states\n" TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC) { struct gsm_bts *bts = bts_by_num_str(argv[0]); struct gsm_bts_trx *trx = trx_by_num_str(bts, argv[1]); argv += 2; argc -= 2; if (!_expect_ts_use(bts, trx, argv)) exit(1); return CMD_SUCCESS; } DEFUN(codec_f, codec_f_cmd, "codec tch/f (AMR|EFR|FR)", "Define which codec should be used for new TCH/F lchans (for set-ts-use)\n" "Configure the TCH/F codec to use\nAMR\nEFR\nFR\n") { osmo_talloc_replace_string(ctx, &codec_tch_f, argv[0]); return CMD_SUCCESS; } DEFUN(codec_h, codec_h_cmd, "codec tch/h (AMR|HR)", "Define which codec should be used for new TCH/H lchans (for set-ts-use)\n" "Configure the TCH/H codec to use\nAMR\nHR\n") { osmo_talloc_replace_string(ctx, &codec_tch_h, argv[0]); return CMD_SUCCESS; } DEFUN(set_ts_use, set_ts_use_cmd, "set-ts-use trx <0-255> <0-255> states" TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE TS_USE, "Put timeslots of a BTS' TRX into a specific state\n" "Indicate a BTS and TRX\n" "BTS nr\n" "TRX nr\n" "List of 8 TS states to apply\n" TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC TS_USE_DOC) { struct gsm_bts *bts = bts_by_num_str(argv[0]); struct gsm_bts_trx *trx = trx_by_num_str(bts, argv[1]); argv += 2; argc -= 2; if (!_set_ts_use(bts, trx, argv)) exit(1); if (!_expect_ts_use(bts, trx, argv)) exit(1); return CMD_SUCCESS; } static void ho_test_vty_init() { install_element(CONFIG_NODE, &create_n_bts_cmd); install_element(CONFIG_NODE, &create_bts_cmd); install_element(CONFIG_NODE, &create_ms_cmd); install_element(CONFIG_NODE, &meas_rep_cmd); install_element(CONFIG_NODE, &congestion_check_cmd); install_element(CONFIG_NODE, &expect_no_chan_cmd); install_element(CONFIG_NODE, &expect_chan_cmd); install_element(CONFIG_NODE, &ack_chan_cmd); install_element(CONFIG_NODE, &expect_ho_req_cmd); install_element(CONFIG_NODE, &ho_detection_cmd); install_element(CONFIG_NODE, &ho_complete_cmd); install_element(CONFIG_NODE, &expect_ho_cmd); install_element(CONFIG_NODE, &ho_failed_cmd); install_element(CONFIG_NODE, &expect_ts_use_cmd); install_element(CONFIG_NODE, &codec_f_cmd); install_element(CONFIG_NODE, &codec_h_cmd); install_element(CONFIG_NODE, &set_ts_use_cmd); } static const struct log_info_cat log_categories[] = { [DHO] = { .name = "DHO", .description = "Hand-Over Process", .color = "\033[1;38m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DHODEC] = { .name = "DHODEC", .description = "Hand-Over Decision", .color = "\033[1;38m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DMEAS] = { .name = "DMEAS", .description = "Radio Measurement Processing", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DREF] = { .name = "DREF", .description = "Reference Counting", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DRSL] = { .name = "DRSL", .description = "A-bis Radio Signalling Link (RSL)", .color = "\033[1;35m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DRR] = { .name = "DRR", .description = "RR", .color = "\033[1;35m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DRLL] = { .name = "DRLL", .description = "RLL", .color = "\033[1;35m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DMSC] = { .name = "DMSC", .description = "Mobile Switching Center", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DCHAN] = { .name = "DCHAN", .description = "lchan FSM", .color = "\033[1;32m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DTS] = { .name = "DTS", .description = "timeslot FSM", .color = "\033[1;31m", .enabled = 1, .loglevel = LOGL_DEBUG, }, [DAS] = { .name = "DAS", .description = "assignment FSM", .color = "\033[1;33m", .enabled = 1, .loglevel = LOGL_DEBUG, }, }; const struct log_info log_info = { .cat = log_categories, .num_cat = ARRAY_SIZE(log_categories), }; static struct vty_app_info vty_info = { .name = "ho_test", .copyright = "Copyright (C) 2020 sysmocom - s.f.m.c. GmbH\r\n" "License AGPLv3+: GNU AGPL version 3 or later \r\n" "This is free software: you are free to change and redistribute it.\r\n" "There is NO WARRANTY, to the extent permitted by law.\r\n", .version = PACKAGE_VERSION, .usr_attr_desc = { [BSC_VTY_ATTR_RESTART_ABIS_OML_LINK] = \ "This command applies on A-bis OML link (re)establishment", [BSC_VTY_ATTR_RESTART_ABIS_RSL_LINK] = \ "This command applies on A-bis RSL link (re)establishment", [BSC_VTY_ATTR_NEW_LCHAN] = \ "This command applies for newly created lchans", }, .usr_attr_letters = { [BSC_VTY_ATTR_RESTART_ABIS_OML_LINK] = 'o', [BSC_VTY_ATTR_RESTART_ABIS_RSL_LINK] = 'r', [BSC_VTY_ATTR_NEW_LCHAN] = 'l', }, }; int main(int argc, char **argv) { char *test_file = NULL; int rc; if (argc < 2) { fprintf(stderr, "Pass a handover test script as argument\n"); exit(1); } test_file = argv[1]; ctx = talloc_named_const(NULL, 0, "handover_test"); msgb_talloc_ctx_init(ctx, 0); vty_info.tall_ctx = ctx; osmo_init_logging2(ctx, &log_info); log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE); log_set_print_category(osmo_stderr_target, 1); log_set_print_category_hex(osmo_stderr_target, 0); log_set_print_level(osmo_stderr_target, 1); log_set_print_timestamp(osmo_stderr_target, 0); osmo_fsm_log_addr(false); bsc_network_alloc(); if (!bsc_gsmnet) exit(1); vty_init(&vty_info); bsc_vty_init(bsc_gsmnet); ho_test_vty_init(); ts_fsm_init(); lchan_fsm_init(); bsc_subscr_conn_fsm_init(); handover_fsm_init(); ho_set_algorithm(bsc_gsmnet->ho, 2); ho_set_ho_active(bsc_gsmnet->ho, true); ho_set_hodec2_as_active(bsc_gsmnet->ho, true); ho_set_hodec2_min_rxlev(bsc_gsmnet->ho, -100); ho_set_hodec2_rxlev_avg_win(bsc_gsmnet->ho, 1); ho_set_hodec2_rxlev_neigh_avg_win(bsc_gsmnet->ho, 1); ho_set_hodec2_rxqual_avg_win(bsc_gsmnet->ho, 10); ho_set_hodec2_pwr_hysteresis(bsc_gsmnet->ho, 3); ho_set_hodec2_pwr_interval(bsc_gsmnet->ho, 1); ho_set_hodec2_afs_bias_rxlev(bsc_gsmnet->ho, 0); ho_set_hodec2_min_rxqual(bsc_gsmnet->ho, 5); ho_set_hodec2_afs_bias_rxqual(bsc_gsmnet->ho, 0); ho_set_hodec2_max_distance(bsc_gsmnet->ho, 9999); ho_set_hodec2_ho_max(bsc_gsmnet->ho, 9999); ho_set_hodec2_penalty_max_dist(bsc_gsmnet->ho, 300); ho_set_hodec2_penalty_failed_ho(bsc_gsmnet->ho, 60); ho_set_hodec2_penalty_failed_as(bsc_gsmnet->ho, 60); /* We don't really need any specific model here */ bts_model_unknown_init(); /* Disable the congestion check timer, we will trigger manually. */ bsc_gsmnet->hodec2.congestion_check_interval_s = 0; handover_decision_1_init(); hodec2_init(bsc_gsmnet); rc = vty_read_config_file(test_file, NULL); if (rc < 0) { fprintf(stderr, "Failed to parse the test file: '%s'\n", test_file); } talloc_free(ctx); fprintf(stderr,"-------------------\n"); if (!rc) fprintf(stderr, "pass\n"); else fprintf(stderr, "FAIL\n"); return rc; } void rtp_socket_free() {} void rtp_send_frame() {} void rtp_socket_upstream() {} void rtp_socket_create() {} void rtp_socket_connect() {} void rtp_socket_proxy() {} void trau_mux_unmap() {} void trau_mux_map_lchan() {} void trau_recv_lchan() {} void trau_send_frame() {} int osmo_bsc_sigtran_send(struct gsm_subscriber_connection *conn, struct msgb *msg) { return 0; } int osmo_bsc_sigtran_open_conn(struct gsm_subscriber_connection *conn, struct msgb *msg) { return 0; } void bsc_sapi_n_reject(struct gsm_subscriber_connection *conn, uint8_t dlci, enum gsm0808_cause cause) {} void bsc_cipher_mode_compl(struct gsm_subscriber_connection *conn, struct msgb *msg, uint8_t chosen_encr) {} int bsc_compl_l3(struct gsm_lchan *lchan, struct msgb *msg, uint16_t chosen_channel) { return 0; } int bsc_paging_start(struct bsc_paging_params *params) { return 0; } void bsc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg) {} void bsc_assign_compl(struct gsm_subscriber_connection *conn, uint8_t rr_cause) {} void bsc_cm_update(struct gsm_subscriber_connection *conn, const uint8_t *cm2, uint8_t cm2_len, const uint8_t *cm3, uint8_t cm3_len) {} struct gsm0808_handover_required; int bsc_tx_bssmap_ho_required(struct gsm_lchan *lchan, const struct gsm0808_cell_id_list2 *target_cells) { return 0; } int bsc_tx_bssmap_ho_request_ack(struct gsm_subscriber_connection *conn, struct msgb *rr_ho_command) { return 0; } int bsc_tx_bssmap_ho_detect(struct gsm_subscriber_connection *conn) { return 0; } enum handover_result bsc_tx_bssmap_ho_complete(struct gsm_subscriber_connection *conn, struct gsm_lchan *lchan) { return HO_RESULT_OK; } void bsc_tx_bssmap_ho_failure(struct gsm_subscriber_connection *conn) {} void osmo_bsc_sigtran_tx_reset(void) {} void osmo_bsc_sigtran_tx_reset_ack(void) {} void osmo_bsc_sigtran_reset(void) {} void bssmap_reset_alloc(void) {} void bssmap_reset_is_conn_ready(void) {}