diff options
Diffstat (limited to 'openbsc/src/libbsc/pcu_sock.c')
-rw-r--r-- | openbsc/src/libbsc/pcu_sock.c | 742 |
1 files changed, 0 insertions, 742 deletions
diff --git a/openbsc/src/libbsc/pcu_sock.c b/openbsc/src/libbsc/pcu_sock.c deleted file mode 100644 index 98e12fad4..000000000 --- a/openbsc/src/libbsc/pcu_sock.c +++ /dev/null @@ -1,742 +0,0 @@ -/* pcu_sock.c: Connect from PCU via unix domain socket */ - -/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> - * (C) 2009-2012 by Andreas Eversberg <jolly@eversberg.eu> - * (C) 2012 by Holger Hans Peter Freyther - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 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 General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - */ - -#include <stdio.h> -#include <unistd.h> -#include <stdlib.h> -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <sys/socket.h> -#include <sys/un.h> - -#include <osmocom/core/talloc.h> -#include <osmocom/core/select.h> -#include <osmocom/core/socket.h> -#include <osmocom/core/logging.h> -#include <osmocom/gsm/l1sap.h> -#include <osmocom/gsm/gsm0502.h> - -#include <openbsc/gsm_data.h> -#include <openbsc/pcu_if.h> -#include <openbsc/pcuif_proto.h> -#include <openbsc/signal.h> -#include <openbsc/debug.h> -#include <openbsc/abis_rsl.h> - -static int pcu_sock_send(struct gsm_bts *bts, struct msgb *msg); -uint32_t trx_get_hlayer1(struct gsm_bts_trx *trx); -int pcu_direct = 1; - -static const char *sapi_string[] = { - [PCU_IF_SAPI_RACH] = "RACH", - [PCU_IF_SAPI_AGCH] = "AGCH", - [PCU_IF_SAPI_PCH] = "PCH", - [PCU_IF_SAPI_BCCH] = "BCCH", - [PCU_IF_SAPI_PDTCH] = "PDTCH", - [PCU_IF_SAPI_PRACH] = "PRACH", - [PCU_IF_SAPI_PTCCH] = "PTCCH", - [PCU_IF_SAPI_AGCH_DT] = "AGCH_DT", -}; - -/* Check if BTS has a PCU connection */ -static bool pcu_connected(struct gsm_bts *bts) -{ - struct pcu_sock_state *state = bts->pcu_state; - - if (!state) - return false; - if (state->conn_bfd.fd <= 0) - return false; - return true; -} - -/* - * PCU messages - */ - -/* Set up an message buffer to package an pcu interface message */ -struct msgb *pcu_msgb_alloc(uint8_t msg_type, uint8_t bts_nr) -{ - struct msgb *msg; - struct gsm_pcu_if *pcu_prim; - - msg = msgb_alloc(sizeof(struct gsm_pcu_if), "pcu_sock_tx"); - if (!msg) - return NULL; - - msgb_put(msg, sizeof(struct gsm_pcu_if)); - pcu_prim = (struct gsm_pcu_if *) msg->data; - pcu_prim->msg_type = msg_type; - pcu_prim->bts_nr = bts_nr; - - return msg; -} - -/* Helper function exclusivly used by pcu_if_signal_cb() */ -static bool ts_should_be_pdch(struct gsm_bts_trx_ts *ts) { - if (ts->pchan == GSM_PCHAN_PDCH) - return true; - if (ts->pchan == GSM_PCHAN_TCH_F_PDCH) { - /* When we're busy deactivating the PDCH, we first set - * DEACT_PENDING, tell the PCU about it and wait for a - * response. So DEACT_PENDING means "no PDCH" to the PCU. - * Similarly, when we're activating PDCH, we set the - * ACT_PENDING and wait for an activation response from the - * PCU, so ACT_PENDING means "is PDCH". */ - if (ts->flags & TS_F_PDCH_ACTIVE) - return !(ts->flags & TS_F_PDCH_DEACT_PENDING); - else - return (ts->flags & TS_F_PDCH_ACT_PENDING); - } - if (ts->pchan == GSM_PCHAN_TCH_F_TCH_H_PDCH) { - /* - * When we're busy de-/activating the PDCH, we first set - * ts->dyn.pchan_want, tell the PCU about it and wait for a - * response. So only care about dyn.pchan_want here. - */ - return ts->dyn.pchan_want == GSM_PCHAN_PDCH; - } - return false; -} - -/* Send BTS properties to the PCU */ -static int pcu_tx_info_ind(struct gsm_bts *bts) -{ - struct msgb *msg; - struct gsm_pcu_if *pcu_prim; - struct gsm_pcu_if_info_ind *info_ind; - struct gprs_rlc_cfg *rlcc; - struct gsm_bts_gprs_nsvc *nsvc; - struct gsm_bts_trx *trx; - struct gsm_bts_trx_ts *ts; - int i, j; - - OSMO_ASSERT(bts); - OSMO_ASSERT(bts->network); - - LOGP(DPCU, LOGL_INFO, "Sending info for BTS %d\n",bts->nr); - - rlcc = &bts->gprs.cell.rlc_cfg; - - msg = pcu_msgb_alloc(PCU_IF_MSG_INFO_IND, bts->nr); - if (!msg) - return -ENOMEM; - - pcu_prim = (struct gsm_pcu_if *) msg->data; - info_ind = &pcu_prim->u.info_ind; - info_ind->version = PCU_IF_VERSION; - info_ind->flags |= PCU_IF_FLAG_ACTIVE; - - if (pcu_direct) - info_ind->flags |= PCU_IF_FLAG_SYSMO; - - /* RAI */ - info_ind->mcc = bts->network->country_code; - info_ind->mnc = bts->network->network_code; - info_ind->lac = bts->location_area_code; - info_ind->rac = bts->gprs.rac; - - /* NSE */ - info_ind->nsei = bts->gprs.nse.nsei; - memcpy(info_ind->nse_timer, bts->gprs.nse.timer, 7); - memcpy(info_ind->cell_timer, bts->gprs.cell.timer, 11); - - /* cell attributes */ - info_ind->cell_id = bts->cell_identity; - info_ind->repeat_time = rlcc->paging.repeat_time; - info_ind->repeat_count = rlcc->paging.repeat_count; - info_ind->bvci = bts->gprs.cell.bvci; - info_ind->t3142 = rlcc->parameter[RLC_T3142]; - info_ind->t3169 = rlcc->parameter[RLC_T3169]; - info_ind->t3191 = rlcc->parameter[RLC_T3191]; - info_ind->t3193_10ms = rlcc->parameter[RLC_T3193]; - info_ind->t3195 = rlcc->parameter[RLC_T3195]; - info_ind->n3101 = rlcc->parameter[RLC_N3101]; - info_ind->n3103 = rlcc->parameter[RLC_N3103]; - info_ind->n3105 = rlcc->parameter[RLC_N3105]; - info_ind->cv_countdown = rlcc->parameter[CV_COUNTDOWN]; - if (rlcc->cs_mask & (1 << GPRS_CS1)) - info_ind->flags |= PCU_IF_FLAG_CS1; - if (rlcc->cs_mask & (1 << GPRS_CS2)) - info_ind->flags |= PCU_IF_FLAG_CS2; - if (rlcc->cs_mask & (1 << GPRS_CS3)) - info_ind->flags |= PCU_IF_FLAG_CS3; - if (rlcc->cs_mask & (1 << GPRS_CS4)) - info_ind->flags |= PCU_IF_FLAG_CS4; - if (bts->gprs.mode == BTS_GPRS_EGPRS) { - if (rlcc->cs_mask & (1 << GPRS_MCS1)) - info_ind->flags |= PCU_IF_FLAG_MCS1; - if (rlcc->cs_mask & (1 << GPRS_MCS2)) - info_ind->flags |= PCU_IF_FLAG_MCS2; - if (rlcc->cs_mask & (1 << GPRS_MCS3)) - info_ind->flags |= PCU_IF_FLAG_MCS3; - if (rlcc->cs_mask & (1 << GPRS_MCS4)) - info_ind->flags |= PCU_IF_FLAG_MCS4; - if (rlcc->cs_mask & (1 << GPRS_MCS5)) - info_ind->flags |= PCU_IF_FLAG_MCS5; - if (rlcc->cs_mask & (1 << GPRS_MCS6)) - info_ind->flags |= PCU_IF_FLAG_MCS6; - if (rlcc->cs_mask & (1 << GPRS_MCS7)) - info_ind->flags |= PCU_IF_FLAG_MCS7; - if (rlcc->cs_mask & (1 << GPRS_MCS8)) - info_ind->flags |= PCU_IF_FLAG_MCS8; - if (rlcc->cs_mask & (1 << GPRS_MCS9)) - info_ind->flags |= PCU_IF_FLAG_MCS9; - } -#warning "isn't dl_tbf_ext wrong?: * 10 and no ntohs" - info_ind->dl_tbf_ext = rlcc->parameter[T_DL_TBF_EXT]; -#warning "isn't ul_tbf_ext wrong?: * 10 and no ntohs" - info_ind->ul_tbf_ext = rlcc->parameter[T_UL_TBF_EXT]; - info_ind->initial_cs = rlcc->initial_cs; - info_ind->initial_mcs = rlcc->initial_mcs; - - /* NSVC */ - for (i = 0; i < ARRAY_SIZE(info_ind->nsvci); i++) { - nsvc = &bts->gprs.nsvc[i]; - info_ind->nsvci[i] = nsvc->nsvci; - info_ind->local_port[i] = nsvc->local_port; - info_ind->remote_port[i] = nsvc->remote_port; - info_ind->remote_ip[i] = nsvc->remote_ip; - } - - for (i = 0; i < ARRAY_SIZE(info_ind->trx); i++) { - trx = gsm_bts_trx_num(bts, i); - if (!trx) - continue; - info_ind->trx[i].hlayer1 = 0x2342; - info_ind->trx[i].pdch_mask = 0; - info_ind->trx[i].arfcn = trx->arfcn; - for (j = 0; j < ARRAY_SIZE(trx->ts); j++) { - ts = &trx->ts[j]; - if (ts->mo.nm_state.operational == NM_OPSTATE_ENABLED - && ts_should_be_pdch(ts)) { - info_ind->trx[i].pdch_mask |= (1 << j); - info_ind->trx[i].tsc[j] = - (ts->tsc >= 0) ? ts->tsc : bts->bsic & 7; - LOGP(DPCU, LOGL_INFO, "trx=%d ts=%d: " - "available (tsc=%d arfcn=%d)\n", - trx->nr, ts->nr, - info_ind->trx[i].tsc[j], - info_ind->trx[i].arfcn); - } - } - } - - return pcu_sock_send(bts, msg); -} - -void pcu_info_update(struct gsm_bts *bts) -{ - if (pcu_connected(bts)) - pcu_tx_info_ind(bts); -} - -/* Forward rach indication to PCU */ -int pcu_tx_rach_ind(struct gsm_bts *bts, int16_t qta, uint16_t ra, uint32_t fn, - uint8_t is_11bit, enum ph_burst_type burst_type) -{ - struct msgb *msg; - struct gsm_pcu_if *pcu_prim; - struct gsm_pcu_if_rach_ind *rach_ind; - - /* Bail if no PCU is connected */ - if (!pcu_connected(bts)) { - LOGP(DRSL, LOGL_ERROR, "BTS %d CHAN RQD(GPRS) but PCU not " - "connected!\n", bts->nr); - return -ENODEV; - } - - LOGP(DPCU, LOGL_INFO, "Sending RACH indication: qta=%d, ra=%d, " - "fn=%d\n", qta, ra, fn); - - msg = pcu_msgb_alloc(PCU_IF_MSG_RACH_IND, bts->nr); - if (!msg) - return -ENOMEM; - pcu_prim = (struct gsm_pcu_if *) msg->data; - rach_ind = &pcu_prim->u.rach_ind; - - rach_ind->sapi = PCU_IF_SAPI_RACH; - rach_ind->ra = ra; - rach_ind->qta = qta; - rach_ind->fn = fn; - rach_ind->is_11bit = is_11bit; - rach_ind->burst_type = burst_type; - - return pcu_sock_send(bts, msg); -} - -/* Confirm the sending of an immediate assignment to the pcu */ -int pcu_tx_imm_ass_sent(struct gsm_bts *bts, uint32_t tlli) -{ - struct msgb *msg; - struct gsm_pcu_if *pcu_prim; - struct gsm_pcu_if_data_cnf_dt *data_cnf_dt; - - LOGP(DPCU, LOGL_INFO, "Sending PCH confirm with direct TLLI\n"); - - msg = pcu_msgb_alloc(PCU_IF_MSG_DATA_CNF_DT, bts->nr); - if (!msg) - return -ENOMEM; - pcu_prim = (struct gsm_pcu_if *) msg->data; - data_cnf_dt = &pcu_prim->u.data_cnf_dt; - - data_cnf_dt->sapi = PCU_IF_SAPI_PCH; - data_cnf_dt->tlli = tlli; - - return pcu_sock_send(bts, msg); -} - -/* we need to decode the raw RR paging messsage (see PCU code - * Encoding::write_paging_request) and extract the mobile identity - * (P-TMSI) from it */ -static int pcu_rx_rr_paging(struct gsm_bts *bts, uint8_t paging_group, - const uint8_t *raw_rr_msg) -{ - struct gsm48_paging1 *p1 = (struct gsm48_paging1 *) raw_rr_msg; - uint8_t chan_needed; - unsigned int mi_len; - uint8_t *mi; - int rc; - - switch (p1->msg_type) { - case GSM48_MT_RR_PAG_REQ_1: - chan_needed = (p1->cneed2 << 2) | p1->cneed1; - mi_len = p1->data[0]; - mi = p1->data+1; - LOGP(DPCU, LOGL_ERROR, "PCU Sends paging " - "request type %02x (chan_needed=%02x, mi_len=%u, mi=%s)\n", - p1->msg_type, chan_needed, mi_len, - osmo_hexdump_nospc(mi,mi_len)); - /* NOTE: We will have to add 2 to mi_len and subtract 2 from - * the mi pointer because rsl_paging_cmd() will perform the - * reverse operations. This is because rsl_paging_cmd() is - * normally expected to chop off the element identifier (0xC0) - * and the length field. In our parameter, we do not have - * those fields included. */ - rc = rsl_paging_cmd(bts, paging_group, mi_len+2, mi-2, - chan_needed, true); - break; - case GSM48_MT_RR_PAG_REQ_2: - case GSM48_MT_RR_PAG_REQ_3: - LOGP(DPCU, LOGL_ERROR, "PCU Sends unsupported paging " - "request type %02x\n", p1->msg_type); - rc = -EINVAL; - break; - default: - LOGP(DPCU, LOGL_ERROR, "PCU Sends unknown paging " - "request type %02x\n", p1->msg_type); - rc = -EINVAL; - break; - } - - return rc; -} - -static int pcu_rx_data_req(struct gsm_bts *bts, uint8_t msg_type, - struct gsm_pcu_if_data *data_req) -{ - uint8_t is_ptcch; - struct gsm_bts_trx *trx; - struct gsm_bts_trx_ts *ts; - struct msgb *msg; - char imsi_digit_buf[4]; - uint32_t tlli = -1; - uint8_t pag_grp; - int rc = 0; - - LOGP(DPCU, LOGL_DEBUG, "Data request received: sapi=%s arfcn=%d " - "block=%d data=%s\n", sapi_string[data_req->sapi], - data_req->arfcn, data_req->block_nr, - osmo_hexdump(data_req->data, data_req->len)); - - switch (data_req->sapi) { - case PCU_IF_SAPI_PCH: - /* the first three bytes are the last three digits of - * the IMSI, which we need to compute the paging group */ - imsi_digit_buf[0] = data_req->data[0]; - imsi_digit_buf[1] = data_req->data[1]; - imsi_digit_buf[2] = data_req->data[2]; - imsi_digit_buf[3] = '\0'; - LOGP(DPCU, LOGL_DEBUG, "SAPI PCH imsi %s\n", imsi_digit_buf); - pag_grp = gsm0502_calc_paging_group(&bts->si_common.chan_desc, - str_to_imsi(imsi_digit_buf)); - pcu_rx_rr_paging(bts, pag_grp, data_req->data+3); - break; - case PCU_IF_SAPI_AGCH: - msg = msgb_alloc(data_req->len, "pcu_agch"); - if (!msg) { - rc = -ENOMEM; - break; - } - msg->l3h = msgb_put(msg, data_req->len); - memcpy(msg->l3h, data_req->data, data_req->len); - - if (rsl_imm_assign_cmd(bts, msg->len, msg->data)) { - msgb_free(msg); - rc = -EIO; - } - break; - case PCU_IF_SAPI_AGCH_DT: - /* DT = direct tlli. A tlli is prefixed */ - - if (data_req->len < 5) { - LOGP(DPCU, LOGL_ERROR, "Received PCU data request with " - "invalid/small length %d\n", data_req->len); - break; - } - tlli = *((uint32_t *)data_req->data); - - msg = msgb_alloc(data_req->len - 4, "pcu_agch"); - if (!msg) { - rc = -ENOMEM; - break; - } - msg->l3h = msgb_put(msg, data_req->len - 4); - memcpy(msg->l3h, data_req->data + 4, data_req->len - 4); - - if (bts->type == GSM_BTS_TYPE_RBS2000) - rc = rsl_ericsson_imm_assign_cmd(bts, tlli, msg->len, msg->data); - else - rc = rsl_imm_assign_cmd(bts, msg->len, msg->data); - - if (rc) { - msgb_free(msg); - rc = -EIO; - } - break; - default: - LOGP(DPCU, LOGL_ERROR, "Received PCU data request with " - "unsupported sapi %d\n", data_req->sapi); - rc = -EINVAL; - } - - return rc; -} - -static int pcu_rx(struct gsm_network *net, uint8_t msg_type, - struct gsm_pcu_if *pcu_prim) -{ - int rc = 0; - struct gsm_bts *bts; - - /* FIXME: allow multiple BTS */ - bts = llist_entry(net->bts_list.next, struct gsm_bts, list); - - switch (msg_type) { - case PCU_IF_MSG_DATA_REQ: - case PCU_IF_MSG_PAG_REQ: - rc = pcu_rx_data_req(bts, msg_type, &pcu_prim->u.data_req); - break; - default: - LOGP(DPCU, LOGL_ERROR, "Received unknwon PCU msg type %d\n", - msg_type); - rc = -EINVAL; - } - - return rc; -} - -/* - * PCU socket interface - */ - -static int pcu_sock_send(struct gsm_bts *bts, struct msgb *msg) -{ - struct pcu_sock_state *state = bts->pcu_state; - struct osmo_fd *conn_bfd; - struct gsm_pcu_if *pcu_prim = (struct gsm_pcu_if *) msg->data; - - if (!state) { - if (pcu_prim->msg_type != PCU_IF_MSG_TIME_IND) - LOGP(DPCU, LOGL_INFO, "PCU socket not created, " - "dropping message\n"); - msgb_free(msg); - return -EINVAL; - } - conn_bfd = &state->conn_bfd; - if (conn_bfd->fd <= 0) { - if (pcu_prim->msg_type != PCU_IF_MSG_TIME_IND) - LOGP(DPCU, LOGL_NOTICE, "PCU socket not connected, " - "dropping message\n"); - msgb_free(msg); - return -EIO; - } - msgb_enqueue(&state->upqueue, msg); - conn_bfd->when |= BSC_FD_WRITE; - - return 0; -} - -static void pcu_sock_close(struct pcu_sock_state *state) -{ - struct osmo_fd *bfd = &state->conn_bfd; - struct gsm_bts *bts; - struct gsm_bts_trx *trx; - struct gsm_bts_trx_ts *ts; - int i, j; - - /* FIXME: allow multiple BTS */ - bts = llist_entry(state->net->bts_list.next, struct gsm_bts, list); - - LOGP(DPCU, LOGL_NOTICE, "PCU socket has LOST connection\n"); - - close(bfd->fd); - bfd->fd = -1; - osmo_fd_unregister(bfd); - - /* re-enable the generation of ACCEPT for new connections */ - state->listen_bfd.when |= BSC_FD_READ; - -#if 0 - /* remove si13, ... */ - bts->si_valid &= ~(1 << SYSINFO_TYPE_13); - osmo_signal_dispatch(SS_GLOBAL, S_NEW_SYSINFO, bts); -#endif - - /* release PDCH */ - for (i = 0; i < 8; i++) { - trx = gsm_bts_trx_num(bts, i); - if (!trx) - break; - for (j = 0; j < 8; j++) { - ts = &trx->ts[j]; - if (ts->mo.nm_state.operational == NM_OPSTATE_ENABLED - && ts->pchan == GSM_PCHAN_PDCH) { - printf("l1sap_chan_rel(trx,gsm_lchan2chan_nr(ts->lchan));\n"); - } - } - } - - /* flush the queue */ - while (!llist_empty(&state->upqueue)) { - struct msgb *msg = msgb_dequeue(&state->upqueue); - msgb_free(msg); - } -} - -static int pcu_sock_read(struct osmo_fd *bfd) -{ - struct pcu_sock_state *state = (struct pcu_sock_state *)bfd->data; - struct gsm_pcu_if *pcu_prim; - struct msgb *msg; - int rc; - - msg = msgb_alloc(sizeof(*pcu_prim), "pcu_sock_rx"); - if (!msg) - return -ENOMEM; - - pcu_prim = (struct gsm_pcu_if *) msg->tail; - - rc = recv(bfd->fd, msg->tail, msgb_tailroom(msg), 0); - if (rc == 0) - goto close; - - if (rc < 0) { - if (errno == EAGAIN) - return 0; - goto close; - } - - rc = pcu_rx(state->net, pcu_prim->msg_type, pcu_prim); - - /* as we always synchronously process the message in pcu_rx() and - * its callbacks, we can free the message here. */ - msgb_free(msg); - - return rc; - -close: - msgb_free(msg); - pcu_sock_close(state); - return -1; -} - -static int pcu_sock_write(struct osmo_fd *bfd) -{ - struct pcu_sock_state *state = bfd->data; - int rc; - - while (!llist_empty(&state->upqueue)) { - struct msgb *msg, *msg2; - struct gsm_pcu_if *pcu_prim; - - /* peek at the beginning of the queue */ - msg = llist_entry(state->upqueue.next, struct msgb, list); - pcu_prim = (struct gsm_pcu_if *)msg->data; - - bfd->when &= ~BSC_FD_WRITE; - - /* bug hunter 8-): maybe someone forgot msgb_put(...) ? */ - if (!msgb_length(msg)) { - LOGP(DPCU, LOGL_ERROR, "message type (%d) with ZERO " - "bytes!\n", pcu_prim->msg_type); - goto dontsend; - } - - /* try to send it over the socket */ - rc = write(bfd->fd, msgb_data(msg), msgb_length(msg)); - if (rc == 0) - goto close; - if (rc < 0) { - if (errno == EAGAIN) { - bfd->when |= BSC_FD_WRITE; - break; - } - goto close; - } - -dontsend: - /* _after_ we send it, we can deueue */ - msg2 = msgb_dequeue(&state->upqueue); - assert(msg == msg2); - msgb_free(msg); - } - return 0; - -close: - pcu_sock_close(state); - - return -1; -} - -static int pcu_sock_cb(struct osmo_fd *bfd, unsigned int flags) -{ - int rc = 0; - - if (flags & BSC_FD_READ) - rc = pcu_sock_read(bfd); - if (rc < 0) - return rc; - - if (flags & BSC_FD_WRITE) - rc = pcu_sock_write(bfd); - - return rc; -} - -/* accept connection comming from PCU */ -static int pcu_sock_accept(struct osmo_fd *bfd, unsigned int flags) -{ - struct pcu_sock_state *state = (struct pcu_sock_state *)bfd->data; - struct osmo_fd *conn_bfd = &state->conn_bfd; - struct sockaddr_un un_addr; - socklen_t len; - int rc; - - len = sizeof(un_addr); - rc = accept(bfd->fd, (struct sockaddr *) &un_addr, &len); - if (rc < 0) { - LOGP(DPCU, LOGL_ERROR, "Failed to accept a new connection\n"); - return -1; - } - - if (conn_bfd->fd >= 0) { - LOGP(DPCU, LOGL_NOTICE, "PCU connects but we already have " - "another active connection ?!?\n"); - /* We already have one PCU connected, this is all we support */ - state->listen_bfd.when &= ~BSC_FD_READ; - close(rc); - return 0; - } - - conn_bfd->fd = rc; - conn_bfd->when = BSC_FD_READ; - conn_bfd->cb = pcu_sock_cb; - conn_bfd->data = state; - - if (osmo_fd_register(conn_bfd) != 0) { - LOGP(DPCU, LOGL_ERROR, "Failed to register new connection " - "fd\n"); - close(conn_bfd->fd); - conn_bfd->fd = -1; - return -1; - } - - LOGP(DPCU, LOGL_NOTICE, "PCU socket connected to external PCU\n"); - - return 0; -} - -/* Open connection to PCU */ -int pcu_sock_init(const char *path, struct gsm_bts *bts) -{ - struct pcu_sock_state *state; - struct osmo_fd *bfd; - int rc; - - state = talloc_zero(NULL, struct pcu_sock_state); - if (!state) - return -ENOMEM; - - INIT_LLIST_HEAD(&state->upqueue); - state->net = bts->network; - state->conn_bfd.fd = -1; - - bfd = &state->listen_bfd; - - bfd->fd = osmo_sock_unix_init(SOCK_SEQPACKET, 0, path, - OSMO_SOCK_F_BIND); - if (bfd->fd < 0) { - LOGP(DPCU, LOGL_ERROR, "Could not create unix socket: %s\n", - strerror(errno)); - talloc_free(state); - return -1; - } - - bfd->when = BSC_FD_READ; - bfd->cb = pcu_sock_accept; - bfd->data = state; - - rc = osmo_fd_register(bfd); - if (rc < 0) { - LOGP(DPCU, LOGL_ERROR, "Could not register listen fd: %d\n", - rc); - close(bfd->fd); - talloc_free(state); - return rc; - } - - bts->pcu_state = state; - return 0; -} - -/* Close connection to PCU */ -void pcu_sock_exit(struct gsm_bts *bts) -{ - struct pcu_sock_state *state = bts->pcu_state; - struct osmo_fd *bfd, *conn_bfd; - - if (!state) - return; - - conn_bfd = &state->conn_bfd; - if (conn_bfd->fd > 0) - pcu_sock_close(state); - bfd = &state->listen_bfd; - close(bfd->fd); - osmo_fd_unregister(bfd); - talloc_free(state); - bts->pcu_state = NULL; -} - |