/* OpenBSC Abis input driver for osmo-e1d */ /* (C) 2019 by Sylvain Munaut * * All Rights Reserved * * SPDX-License-Identifier: GPL-2.0+ * * 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. * */ #include "config.h" #include "internal.h" #ifdef HAVE_E1D #include #include #include #include #include #include #include #include #include #include #include #include #include #define TS_SIGN_ALLOC_SIZE 300 #define S(x) (1 << (x)) struct osmo_e1dp_client *g_e1d; struct osmo_fsm_inst *g_e1d_fsm_inst = NULL; static int invertbits = 1; /* pre-declaration */ extern struct e1inp_driver e1d_driver; static int e1d_want_write(struct e1inp_ts *e1i_ts); static int e1d_fd_cb(struct osmo_fd *bfd, unsigned int what); static int e1d_line_update(struct e1inp_line *line); /* flag array to remember which lines are handled by osmo-e1d */ bool lines[256]; enum fsm_e1d_client_states { ST_DISCONNECTED, ST_CONNECTED, }; enum fsm_e1d_client_evt { EV_CONN_LOST, EV_CONNECT, }; static const struct value_string fsm_e1d_client_evt_names[] = { OSMO_VALUE_STRING(EV_CONN_LOST), OSMO_VALUE_STRING(EV_CONNECT), { 0, NULL } }; struct e1inp_line *e1inp_port_find(uint8_t port_nr) { struct e1inp_line *e1i_line; /* iterate over global list of e1 lines */ llist_for_each_entry(e1i_line, &e1inp_line_list, list) { if (e1i_line->port_nr == port_nr) return e1i_line; } return NULL; } static void e1d_client_event_cb(enum osmo_e1dp_msg_type event, uint8_t intf, uint8_t line, uint8_t ts, uint8_t *data, int len) { struct e1inp_line *e1_line; struct input_signal_data isd; int signal; memset(&isd, 0, sizeof(isd)); /* we use higher 4 bits for interface, lower 4 bits for line, * resulting in max. 16 interfaces with 16 lines each */ e1_line = e1inp_port_find((intf << 4) | line); if (!e1_line) return; isd.line = e1_line; switch (event) { case E1DP_EVT_LOS_ON: signal = S_L_INP_LINE_LOS; break; case E1DP_EVT_LOS_OFF: signal = S_L_INP_LINE_NOLOS; break; case E1DP_EVT_AIS_ON: signal = S_L_INP_LINE_AIS; break; case E1DP_EVT_AIS_OFF: signal = S_L_INP_LINE_NOAIS; break; case E1DP_EVT_RAI_ON: signal = S_L_INP_LINE_RAI; break; case E1DP_EVT_RAI_OFF: signal = S_L_INP_LINE_NORAI; break; case E1DP_EVT_LOF_ON: signal = S_L_INP_LINE_LOF; break; case E1DP_EVT_LOF_OFF: signal = S_L_INP_LINE_NOLOF; break; case E1DP_EVT_SABITS: signal = S_L_INP_LINE_SA_BITS; if (len < 1) return; isd.sa_bits = *data; break; default: /* Ignore all other events. */ return; } osmo_signal_dispatch(SS_L_INPUT, signal, &isd); } static int fsm_e1_client_timer_cb(struct osmo_fsm_inst *fi) { osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONNECT, NULL); return 0; } static void fsm_e1d_client_disconnected_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data) { switch (event) { case EV_CONNECT: if (!g_e1d) { g_e1d = osmo_e1dp_client_create(NULL, "/tmp/osmo-e1d.ctl"); if (!g_e1d) { LOGPFSML(fi, LOGL_ERROR, "Unable to (re)connect to osmo-e1d daemon, retrying...\n"); osmo_fsm_inst_state_chg(g_e1d_fsm_inst, ST_DISCONNECTED, 1, 0); return; } osmo_e1dp_client_event_register(g_e1d, e1d_client_event_cb); } LOGPFSML(fi, LOGL_NOTICE, "Successfully (re)connected to osmo-e1d daemon!\n"); osmo_fsm_inst_state_chg(g_e1d_fsm_inst, ST_CONNECTED, 0, 0); break; default: OSMO_ASSERT(false); break; } } static void terminate_line(struct e1inp_line *line) { int ts; /* There should be technically no way to get a non e1d line into our private memory */ OSMO_ASSERT(line->driver == &e1d_driver); for (ts = 1; ts < line->num_ts; ts++) { unsigned int idx = ts - 1; struct e1inp_ts *e1i_ts = &line->ts[idx]; struct osmo_fd *bfd = &e1i_ts->driver.e1d.fd; /* Only affect file descriptors that are currently in use (do not reset file descriptor value since we * will use this value to detect if the file descriptor was in use when the connection broke.) */ if (bfd->fd >= 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "Terminating osmo-e1d connection to timeslot: %d\n", ts); osmo_fd_unregister(bfd); close(bfd->fd); bfd->fd = -1; } } } static void fsm_e1d_client_connected_onenter_cb(struct osmo_fsm_inst *fi, uint32_t prev_state) { unsigned int i; struct e1inp_line *line; int ret; /* Run a line update to re-establish lost connections */ for (i = 0; i < ARRAY_SIZE(lines); i++) { if (!lines[i]) continue; line = e1inp_line_find(i); if (!line) { /* Apparantly we lost a line - this should not happen */ lines[i] = false; continue; } ret = e1d_line_update(line); if (ret < 0) LOGPFSML(fi, LOGL_ERROR, "Line update failed after (re)connecting to osmo-e1d daemon!\n"); } } static void fsm_e1d_client_connected_cb(struct osmo_fsm_inst *fi, uint32_t event, void *data) { unsigned int i; struct e1inp_line *line; switch (event) { case EV_CONN_LOST: LOGPFSML(fi, LOGL_ERROR, "Lost connection to osmo-e1d daemon!\n"); /* Destroy e1d clinet */ if (g_e1d) { osmo_e1dp_client_destroy(g_e1d); g_e1d = NULL; } /* Terminate all lines at once */ for (i = 0; i < ARRAY_SIZE(lines); i++) { if (!lines[i]) continue; line = e1inp_line_find(i); if (!line) { /* Apparantly we lost a line - this should not happen */ lines[i] = false; continue; } terminate_line(line); } osmo_fsm_inst_state_chg(fi, ST_DISCONNECTED, 1, 0); break; default: OSMO_ASSERT(false); break; } } static bool e1d_connected(void) { if (g_e1d_fsm_inst && g_e1d_fsm_inst->state == ST_CONNECTED) return true; LOGPFSML(g_e1d_fsm_inst, LOGL_ERROR, "No connection to osmo-e1d daemon!\n"); return false; } static struct osmo_fsm_state fsm_e1d_client_states[] = { /* Initial CRCX state. This state is immediately entered and executed * when the FSM is started. The rationale is that we first have to * create a connectin before we can execute other operations on that * connection. */ [ST_DISCONNECTED] = { .in_event_mask = S(EV_CONNECT), .out_state_mask = S(ST_CONNECTED) | S(ST_DISCONNECTED), .name = OSMO_STRINGIFY(ST_DISCONNECTED), .action = fsm_e1d_client_disconnected_cb, }, /* Wait for the response to a CRCX operation, check and process the * results, change to ST_READY afterwards. */ [ST_CONNECTED] = { .in_event_mask = S(EV_CONN_LOST), .out_state_mask = S(ST_DISCONNECTED), .name = OSMO_STRINGIFY(ST_CONNECTED), .action = fsm_e1d_client_connected_cb, .onenter = fsm_e1d_client_connected_onenter_cb, }, }; static struct osmo_fsm fsm_e1d_client = { .name = "e1d_client", .states = fsm_e1d_client_states, .num_states = ARRAY_SIZE(fsm_e1d_client_states), .log_subsys = DLINP, .event_names = fsm_e1d_client_evt_names, .timer_cb = fsm_e1_client_timer_cb, }; static int handle_ts_sign_read(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg = msgb_alloc(TS_SIGN_ALLOC_SIZE, "E1D Signaling TS"); int ret; if (!msg) return -ENOMEM; ret = read(bfd->fd, msg->data, TS_SIGN_ALLOC_SIZE - 16); if (ret < 1) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "%s read error: %d %s\n", __func__, ret, ret < 0 ? strerror(errno) : "bytes read"); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); return ret; } msgb_put(msg, ret); return e1inp_rx_ts_lapd(e1i_ts, msg); } static void timeout_ts_sign_write(void *data) { struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; /* trigger write of ts1, due to tx delay timer */ e1d_want_write(e1i_ts); } static int handle_ts_sign_write(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct e1inp_sign_link *sign_link; struct msgb *msg; osmo_fd_write_disable(bfd); /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, &sign_link); if (!msg) { /* no message after tx delay timer */ return 0; } DEBUGP(DLMI, "TX: %s\n", osmo_hexdump(msg->data, msg->len)); lapd_transmit(e1i_ts->lapd, sign_link->tei, sign_link->sapi, msg); /* set tx delay timer for next event */ osmo_timer_setup(&e1i_ts->sign.tx_timer, timeout_ts_sign_write, e1i_ts); osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, 50000); return 0; } #define D_TSX_ALLOC_SIZE (D_BCHAN_TX_GRAN) static int handle_ts_trau_write(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; uint8_t tx_buf[D_BCHAN_TX_GRAN]; struct subch_mux *mx = &e1i_ts->trau.mux; int ret; ret = subchan_mux_out(mx, tx_buf, D_BCHAN_TX_GRAN); if (ret != D_BCHAN_TX_GRAN) { LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "Huh, got ret of %d\n", ret); if (ret < 0) return ret; } LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "BCHAN TX: %s\n", osmo_hexdump(tx_buf, D_BCHAN_TX_GRAN)); if (invertbits) osmo_revbytebits_buf(tx_buf, ret); ret = write(bfd->fd, tx_buf, ret); if (ret < D_BCHAN_TX_GRAN) { LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "send returns %d instead of %d\n", ret, D_BCHAN_TX_GRAN); if (ret <= 0) osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); } return ret; } static int handle_ts_trau_read(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "E1D Rx TSx"); int ret; if (!msg) return -ENOMEM; ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE); if (ret < 0 || ret != D_TSX_ALLOC_SIZE) { /* FIXME: The socket that we read from is of type SOCK_STREAM. This means that we might read less then * D_TSX_ALLOC_SIZE even though the connection is still fine. Since data is continuously written (in * chunks of D_TSX_ALLOC_SIZE) on the other side we should not get partial reads too often but it is * still possible and when it happens, a reconnect cycle will be triggered. To fix this we should add a * buffering mechainsm that buffers the incomplete read instead of dropping the connection. (changing * the socket type to SOCK_SEQPACKET would be an alternative, but it would break backward compatibility * of the interface.) */ LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "%s read error: %d %s\n", __func__, ret, ret < 0 ? strerror(errno) : "bytes read"); if (ret <= 0) osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); return ret; } if (invertbits) osmo_revbytebits_buf(msg->data, ret); msgb_put(msg, ret); msg->l2h = msg->data; LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "BCHAN RX: %s\n", osmo_hexdump(msgb_l2(msg), ret)); ret = e1inp_rx_ts(e1i_ts, msg, 0, 0); /* physical layer indicates that data has been sent, * we thus can send some more data */ ret = handle_ts_trau_write(bfd); return ret; } /* write to a raw channel TS */ static int handle_ts_raw_write(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg; int ret; /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, NULL); if (!msg) { osmo_fd_write_disable(bfd); return 0; } if (msg->len != D_BCHAN_TX_GRAN) { /* This might lead to a transmit underrun, as we call tx * from the rx path, as there's no select/poll on dahdi * */ LOGPITS(e1i_ts, DLINP, LOGL_NOTICE, "unexpected msg->len = %u, " "expected %u\n", msg->len, D_BCHAN_TX_GRAN); } LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN TX: %s\n", osmo_hexdump(msg->data, msg->len)); if (0/*invertbits*/) osmo_revbytebits_buf(msg->data, msg->len); ret = write(bfd->fd, msg->data, msg->len); if (ret < msg->len) { /* FIXME: The socket that we write to is of type SOCK_STREAM. This means that it may happen that the * syscall is not able to write the full data chunk at once. This is a rare event, but when it happens, * a reconnect cycle is triggered, even though the connection is still fine. To fix this, we should * buffer the remainder of the data to write it in the next cycle instead of dropping the connection. * (changing the socket type to SOCK_SEQPACKET would be an alternative, but it would break backward * compatibility of the interface.) */ LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "send returns %d instead of %d\n", ret, msg->len); if (ret <= 0) osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); } msgb_free(msg); return ret; } static int handle_ts_raw_read(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "E1D Raw TS"); int ret; if (!msg) return -ENOMEM; ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE); if (ret < 0 || ret != D_TSX_ALLOC_SIZE) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "%s read error: %d %s\n", __func__, ret, ret < 0 ? strerror(errno) : "bytes read"); msgb_free(msg); if (ret <= 0) osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); return ret; } if (0/*invertbits*/) osmo_revbytebits_buf(msg->data, ret); msgb_put(msg, ret); msg->l2h = msg->data; LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "RAW CHAN RX: %s\n", msgb_hexdump_l2(msg)); ret = e1inp_rx_ts(e1i_ts, msg, 0, 0); return ret; } /* write to a hdlc channel TS */ static int handle_ts_hdlc_write(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg; int ret; /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, NULL); if (!msg) { osmo_fd_write_disable(bfd); return 0; } LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "HDLC CHAN TX: %s\n", osmo_hexdump(msg->data, msg->len)); ret = write(bfd->fd, msg->data, msg->len); if (ret < msg->len) { LOGPITS(e1i_ts, DLINP, LOGL_NOTICE, "send returns %d instead of %d\n", ret, msg->len); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); } msgb_free(msg); return ret; } #define TSX_ALLOC_SIZE 4096 /* read from a hdlc channel TS */ static int handle_ts_hdlc_read(struct osmo_fd *bfd) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; struct msgb *msg = msgb_alloc(TSX_ALLOC_SIZE, "E1D HDLC TS"); int ret; if (!msg) return -ENOMEM; ret = read(bfd->fd, msg->data, TSX_ALLOC_SIZE); if (ret <= 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "%s read error: %d %s\n", __func__, ret, strerror(errno)); msgb_free(msg); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); return ret; } msgb_put(msg, ret); msg->l2h = msg->data; LOGPITS(e1i_ts, DLMIB, LOGL_DEBUG, "HDLC CHAN RX: %s\n", msgb_hexdump_l2(msg)); ret = e1inp_rx_ts(e1i_ts, msg, 0, 0); return ret; } static void e1d_write_msg(struct msgb *msg, void *cbdata) { struct osmo_fd *bfd = cbdata; struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; int ret; if (!e1d_connected()) { msgb_free(msg); return; } ret = write(bfd->fd, msg->data, msg->len); msgb_free(msg); if (ret < 0) { LOGPITS(e1i_ts, DLMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, line); } } static int e1d_fd_cb(struct osmo_fd *bfd, unsigned int what) { struct e1inp_line *line = bfd->data; unsigned int ts_nr = bfd->priv_nr; unsigned int idx = ts_nr-1; struct e1inp_ts *e1i_ts = &line->ts[idx]; int ret = 0; if (!e1d_connected()) return -EIO; switch (e1i_ts->type) { case E1INP_TS_TYPE_SIGN: if (what & OSMO_FD_READ) ret = handle_ts_sign_read(bfd); if (what & OSMO_FD_WRITE) ret = handle_ts_sign_write(bfd); break; case E1INP_TS_TYPE_TRAU: if (what & OSMO_FD_READ) ret = handle_ts_trau_read(bfd); /* handle_ts_trau_write() is called inside handle_ts_trau_read(). * OSMO_FD_WRITE flag is not required here and will not be set. */ break; case E1INP_TS_TYPE_RAW: if (what & OSMO_FD_READ) ret = handle_ts_raw_read(bfd); if (what & OSMO_FD_WRITE) ret = handle_ts_raw_write(bfd); break; case E1INP_TS_TYPE_HDLC: if (what & OSMO_FD_READ) ret = handle_ts_hdlc_read(bfd); if (what & OSMO_FD_WRITE) ret = handle_ts_hdlc_write(bfd); break; default: LOGPITS(e1i_ts, DLINP, LOGL_NOTICE, "unknown/unsupported E1 TS type %u\n", e1i_ts->type); break; } return ret; } static int e1d_want_write(struct e1inp_ts *e1i_ts) { if (!e1d_connected()) return -EIO; /* We never include the DAHDI B-Channel FD into the writeset */ if (e1i_ts->type == E1INP_TS_TYPE_TRAU || e1i_ts->type == E1INP_TS_TYPE_I460) { LOGPITS(e1i_ts, DLINP, LOGL_DEBUG, "Trying to write TRAU ts\n"); return 0; } osmo_fd_write_enable(&e1i_ts->driver.e1d.fd); return 0; } static int e1d_line_update(struct e1inp_line *line) { int ts; int ret; /* we use higher 4 bits for interface, lower 4 bits for line, * resulting in max. 16 interfaces with 16 lines each */ uint8_t e1d_intf = (line->port_nr >> 4) & 0xF; uint8_t e1d_line = line->port_nr & 0xF; struct osmo_e1dp_ts_info *ts_info; int num_ts_info; if (line->driver != &e1d_driver) return -EINVAL; /* Memorize that osmo-e1d is responsible for this line */ lines[line->num] = true; /* Spawn FSM to handle connection towards osmo-e1d */ if (!g_e1d_fsm_inst) { g_e1d_fsm_inst = osmo_fsm_inst_alloc(&fsm_e1d_client, NULL, NULL, LOGL_DEBUG, "fsm_e1d_client"); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONNECT, NULL); OSMO_ASSERT(g_e1d_fsm_inst); } /* In case no connection to osmo-e1d is available, we may postpone the line update until the connection is * available (again) */ if (!e1d_connected()) { LOGPIL(line, DLINP, LOGL_NOTICE, "No connection to osmo-e1d daemon, postponing Line update: %d %d=E1D(%d:%d) %d\n", line->num, line->port_nr, e1d_intf, e1d_line, line->num_ts); return 0; } LOGPIL(line, DLINP, LOGL_NOTICE, "Line update: %d %d=E1D(%d:%d) %d\n", line->num, line->port_nr, e1d_intf, e1d_line, line->num_ts); ret = osmo_e1dp_client_ts_query(g_e1d, &ts_info, &num_ts_info, e1d_intf, e1d_line, E1DP_INVALID); if (ret < 0) { LOGPIL(line, DLINP, LOGL_ERROR, "Cannot query E1D for timeslot information: %d, postpoining line update\n", ret); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, NULL); /* Since we have mechanisms in place that allow us to postpone the line update until the connection * to osmo-e1d is up again, we may pretend that the line update went ok. */ return 0; } for (ts=1; tsnum_ts; ts++) { unsigned int idx = ts-1; struct e1inp_ts *e1i_ts = &line->ts[idx]; struct osmo_fd *bfd = &e1i_ts->driver.e1d.fd; /* unregister FD if it was already registered/in use */ if (osmo_fd_is_registered(bfd)) osmo_fd_unregister(bfd); if (e1i_ts->type != E1INP_TS_TYPE_NONE && ts >= num_ts_info) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "Timeslot configured, but not existent " "on E1D side; skipping\n"); continue; } switch (e1i_ts->type) { case E1INP_TS_TYPE_NONE: /* close/release LAPD instance, if any */ if (e1i_ts->lapd) { lapd_instance_free(e1i_ts->lapd); e1i_ts->lapd = NULL; } if (bfd->fd >= 0) { close(bfd->fd); bfd->fd = -1; } continue; case E1INP_TS_TYPE_SIGN: if (bfd->fd >= 0 && ts_info[ts].cfg.mode != E1DP_TSMODE_HDLCFCS) { close(bfd->fd); bfd->fd = -1; } if (bfd->fd < 0) { bfd->fd = osmo_e1dp_client_ts_open(g_e1d, e1d_intf, e1d_line, ts, E1DP_TSMODE_HDLCFCS, D_BCHAN_TX_GRAN); } if (bfd->fd < 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "Could not open timeslot %d\n", ts); talloc_free(ts_info); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, NULL); return -EIO; } bfd->when = OSMO_FD_READ; if (!e1i_ts->lapd) { char name[32]; e1inp_ts_name(name, sizeof(name), e1i_ts); e1i_ts->lapd = lapd_instance_alloc2(1, e1d_write_msg, bfd, e1inp_dlsap_up, e1i_ts, &lapd_profile_abis, name); } break; case E1INP_TS_TYPE_HDLC: /* close/release LAPD instance, if any */ if (e1i_ts->lapd) { lapd_instance_free(e1i_ts->lapd); e1i_ts->lapd = NULL; } /* close, if old timeslot mode doesn't match new config */ if (bfd->fd >= 0 && ts_info[ts].cfg.mode != E1DP_TSMODE_HDLCFCS) { close(bfd->fd); bfd->fd = -1; } if (bfd->fd < 0) { bfd->fd = osmo_e1dp_client_ts_open(g_e1d, e1d_intf, e1d_line, ts, E1DP_TSMODE_HDLCFCS, D_BCHAN_TX_GRAN); } if (bfd->fd < 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "Could not open timeslot %d\n", ts); talloc_free(ts_info); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, NULL); return -EIO; } bfd->when = OSMO_FD_READ; break; case E1INP_TS_TYPE_TRAU: case E1INP_TS_TYPE_I460: case E1INP_TS_TYPE_RAW: /* close/release LAPD instance, if any */ if (e1i_ts->lapd) { lapd_instance_free(e1i_ts->lapd); e1i_ts->lapd = NULL; } /* close, if old timeslot mode doesn't match new config */ if (bfd->fd >= 0 && ts_info[ts].cfg.mode != E1DP_TSMODE_RAW) { close(bfd->fd); bfd->fd = -1; } if (bfd->fd < 0) { bfd->fd = osmo_e1dp_client_ts_open(g_e1d, e1d_intf, e1d_line, ts, E1DP_TSMODE_RAW, D_BCHAN_TX_GRAN); } if (bfd->fd < 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "Could not open timeslot %d\n", ts); talloc_free(ts_info); osmo_fsm_inst_dispatch(g_e1d_fsm_inst, EV_CONN_LOST, NULL); return -EIO; } bfd->when = OSMO_FD_READ; break; }; osmo_fd_setup(bfd, bfd->fd, bfd->when, e1d_fd_cb, line, ts); ret = osmo_fd_register(bfd); if (ret < 0) { LOGPITS(e1i_ts, DLINP, LOGL_ERROR, "could not register FD: %s\n", strerror(ret)); talloc_free(ts_info); close(bfd->fd); bfd->fd = -1; return ret; } } talloc_free(ts_info); return 0; } static int e1d_line_create(struct e1inp_line *line) { int ts; for (ts = 1; ts < line->num_ts; ts++) { unsigned int idx = ts - 1; struct e1inp_ts *e1i_ts = &line->ts[idx]; struct osmo_fd *bfd = &e1i_ts->driver.e1d.fd; bfd->fd = -1; } return 0; } static int set_sa_bits(struct e1inp_line *line, uint8_t sa_bits) { /* we use higher 4 bits for interface, lower 4 bits for line, * resulting in max. 16 interfaces with 16 lines each */ uint8_t e1d_intf = (line->port_nr >> 4) & 0xF; uint8_t e1d_line = line->port_nr & 0xF; return osmo_e1dp_client_set_sa_bits(g_e1d, e1d_intf, e1d_line, sa_bits); } struct e1inp_driver e1d_driver = { .name = "e1d", .want_write = e1d_want_write, .set_sa_bits = set_sa_bits, .line_update = e1d_line_update, .line_create = e1d_line_create, }; int e1inp_e1d_init(void) { OSMO_ASSERT(osmo_fsm_register(&fsm_e1d_client) == 0); memset(lines, 0, sizeof(lines)); /* register the driver with the core */ return e1inp_driver_register(&e1d_driver); } #endif /* HAVE_E1D */