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Diffstat (limited to 'openbsc/src/libbsc/pcu_sock.c')
-rw-r--r--openbsc/src/libbsc/pcu_sock.c742
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;
-}
-