From ed5cacb240b846c106f0fc6a3ab8e8721f4c70a5 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 17 Aug 2011 22:44:07 +0200 Subject: src: port openBSC over libosmo-abis This is a big patch that ports openBSC over libosmo-abis. Sorry, the changes that are included here are all dependent of libosmo-abis, splitting them into smaller pieces would leave the repository in some intermediate state, which is not desired. The main changes are: - The directory libabis/ has been removed as it now lives in libosmo-abis. - new configuration file format for nanoBTS and HSL femto, we need to define the virtual e1_line and attach it to the OML link. - all the existing BTS drivers (nanoBTS, hsl femto, Nokia site, BS11 and rbs2000) now use the new libosmo-abis framework. - use r232 input driver available in libosmo-abis for bs11_config. - use ipa_msg_recv instead of old ipaccess_read_msg function. - delete definition of gsm_e1_subslot and input_signal_data. These structures now lives in libosmo-abis. Most of this patch are deletions of libabis/ which has been moved to libosmo-abis. This patch also modifies openBSC to use all the new definitions available in libosmocore and libosmo-abis. In order to do that, we have replaced the following: - DINP, DMI, DMIB and DMUX by their respective DL* correspondences. - SS_GLOBAL by SS_L_GLOBAL - SS_INPUT by SS_L_INPUT - S_GLOBAL_SHUTDOWN by S_L_GLOBAL_SHUTDOWN - SS_INPUT by SS_L_INPUT - S_INP_* by S_L_INP_* sub-signals - E1INP_NODE by L_E1INP_NODE vty node This patch has been tested with: - one nanoBTS - the HSL femto with the examples available under libosmo-abis - BS11 with both dahdi and misdn drivers. --- openbsc/src/libabis/input/hsl.c | 458 ---------------------------------------- 1 file changed, 458 deletions(-) delete mode 100644 openbsc/src/libabis/input/hsl.c (limited to 'openbsc/src/libabis/input/hsl.c') diff --git a/openbsc/src/libabis/input/hsl.c b/openbsc/src/libabis/input/hsl.c deleted file mode 100644 index 7f2e75d62..000000000 --- a/openbsc/src/libabis/input/hsl.c +++ /dev/null @@ -1,458 +0,0 @@ -/* OpenBSC Abis input driver for HSL Femto */ - -/* (C) 2011 by Harald Welte - * (C) 2011 by On-Waves - * - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation; either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see . - * - */ - -/* HSL uses a much more primitive/simplified version of the IPA multiplex. - * - * They have taken out the nice parts like the ID_GET / ID_RESP for resolving - * the UNIT ID, as well as the keepalive ping/pong messages. Furthermore, the - * Stream Identifiers are fixed on the BTS side (RSL always 0, OML always 0xff) - * and both OML+RSL share a single TCP connection. - * - * Other oddities include the encapsulation of BSSGP messages in the L3_INFO IE - * of RSL - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define HSL_TCP_PORT 2500 -#define HSL_PROTO_DEBUG 0xdd - -#define PRIV_OML 1 -#define PRIV_RSL 2 - -/* data structure for one E1 interface with A-bis */ -struct hsl_e1_handle { - struct osmo_fd listen_fd; - struct gsm_network *gsmnet; -}; - -static struct hsl_e1_handle *e1h; - - -#define TS1_ALLOC_SIZE 900 - -#define OML_UP 0x0001 -#define RSL_UP 0x0002 - -int hsl_drop_oml(struct gsm_bts *bts) -{ - struct gsm_bts_trx *trx; - struct e1inp_ts *ts; - struct e1inp_line *line; - struct osmo_fd *bfd; - - if (!bts || !bts->oml_link) - return -1; - - /* send OML down */ - ts = bts->oml_link->ts; - line = ts->line; - e1inp_event(ts, S_INP_TEI_DN, bts->oml_link->tei, bts->oml_link->sapi); - - bfd = &ts->driver.ipaccess.fd; - osmo_fd_unregister(bfd); - close(bfd->fd); - bfd->fd = -1; - - /* clean up OML and RSL */ - e1inp_sign_link_destroy(bts->oml_link); - bts->oml_link = NULL; - e1inp_sign_link_destroy(bts->c0->rsl_link); - bts->c0->rsl_link = NULL; - bts->ip_access.flags = 0; - - /* kill the E1 line now... as we have no one left to use it */ - talloc_free(line); - - return -1; -} - -static int hsl_drop_ts_fd(struct e1inp_ts *ts, struct osmo_fd *bfd) -{ - struct e1inp_sign_link *link, *link2; - int bts_nr = -1; - - llist_for_each_entry_safe(link, link2, &ts->sign.sign_links, list) { - bts_nr = link->trx->bts->bts_nr; - e1inp_sign_link_destroy(link); - } - - osmo_fd_unregister(bfd); - close(bfd->fd); - bfd->fd = -1; - - talloc_free(ts->line); - - return bts_nr; -} - -struct gsm_bts *find_bts_by_serno(struct gsm_network *net, unsigned long serno) -{ - struct gsm_bts *bts; - - llist_for_each_entry(bts, &net->bts_list, list) { - if (bts->type != GSM_BTS_TYPE_HSL_FEMTO) - continue; - - if (serno == bts->hsl.serno) - return bts; - } - - return NULL; -} - - -static int process_hsl_rsl(struct msgb *msg, struct e1inp_line *line) -{ - char serno_buf[16]; - uint8_t serno_len; - unsigned long serno; - struct gsm_bts *bts; - - switch (msg->l2h[1]) { - case 0x80: - /*, contains Serial Number + SW version */ - if (msg->l2h[2] != 0xc0) - break; - serno_len = msg->l2h[3]; - if (serno_len > sizeof(serno_buf)-1) - serno_len = sizeof(serno_buf)-1; - memcpy(serno_buf, msg->l2h+4, serno_len); - serno_buf[serno_len] = '\0'; - serno = strtoul(serno_buf, NULL, 10); - bts = find_bts_by_serno(e1h->gsmnet, serno); - if (!bts) { - LOGP(DINP, LOGL_ERROR, "Unable to find BTS config for " - "serial number %lu(%s)\n", serno, serno_buf); - return -EIO; - } - - DEBUGP(DINP, "Identified HSL BTS Serial Number %lu\n", serno); - - /* we shouldn't hardcode it, but HSL femto also hardcodes it... */ - bts->oml_tei = 255; - bts->c0->rsl_tei = 0; - bts->oml_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1], - E1INP_SIGN_OML, bts->c0, - bts->oml_tei, 0); - bts->c0->rsl_link = e1inp_sign_link_create(&line->ts[PRIV_OML - 1], - E1INP_SIGN_RSL, bts->c0, - bts->c0->rsl_tei, 0); - e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 255, 0); - e1inp_event(&line->ts[PRIV_OML-1], S_INP_TEI_UP, 0, 0); - bts->ip_access.flags |= OML_UP; - bts->ip_access.flags |= (RSL_UP << 0); - msgb_free(msg); - return 1; /* == we have taken over the msg */ - case 0x82: - /* FIXME: do something with BSSGP, i.e. forward it over - * NSIP to OsmoSGSN */ - msgb_free(msg); - return 1; - } - return 0; -} - -static int handle_ts1_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 e1inp_sign_link *link; - struct msgb *msg; - struct ipaccess_head *hh; - int ret = 0, error; - - msg = ipaccess_read_msg(bfd, &error); - if (!msg) { - if (error == 0) { - int ret = hsl_drop_ts_fd(e1i_ts, bfd); - if (ret >= 0) - LOGP(DINP, LOGL_NOTICE, "BTS %u disappeared, dead socket\n", - ret); - else - LOGP(DINP, LOGL_NOTICE, "unknown BTS disappeared, dead socket\n"); - } - return error; - } - - DEBUGP(DMI, "RX %u: %s\n", ts_nr, osmo_hexdump(msgb_l2(msg), msgb_l2len(msg))); - - hh = (struct ipaccess_head *) msg->data; - if (hh->proto == HSL_PROTO_DEBUG) { - LOGP(DINP, LOGL_NOTICE, "HSL debug: %s\n", msg->data + sizeof(*hh)); - msgb_free(msg); - return ret; - } - - /* HSL proprietary RSL extension */ - if (hh->proto == 0 && (msg->l2h[0] == 0x81 || msg->l2h[0] == 0x80)) { - ret = process_hsl_rsl(msg, line); - if (ret < 0) { - /* FIXME: close connection */ - hsl_drop_ts_fd(e1i_ts, bfd); - return ret; - } else if (ret == 1) - return 0; - /* else: continue... */ - } -#ifdef HSL_SR_1_0 - /* HSL for whatever reason chose to use 0x81 instead of 0x80 for FOM */ - if (hh->proto == 255 && msg->l2h[0] == (ABIS_OM_MDISC_FOM | 0x01)) - msg->l2h[0] = ABIS_OM_MDISC_FOM; -#endif - link = e1inp_lookup_sign_link(e1i_ts, hh->proto, 0); - if (!link) { - LOGP(DINP, LOGL_ERROR, "no matching signalling link for " - "hh->proto=0x%02x\n", hh->proto); - msgb_free(msg); - return -EIO; - } - msg->dst = link; - - switch (link->type) { - case E1INP_SIGN_RSL: - if (!(link->trx->bts->ip_access.flags & (RSL_UP << link->trx->nr))) { - e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi); - link->trx->bts->ip_access.flags |= (RSL_UP << link->trx->nr); - } - ret = abis_rsl_rcvmsg(msg); - break; - case E1INP_SIGN_OML: - if (!(link->trx->bts->ip_access.flags & OML_UP)) { - e1inp_event(e1i_ts, S_INP_TEI_UP, link->tei, link->sapi); - link->trx->bts->ip_access.flags |= OML_UP; - } - ret = abis_nm_rcvmsg(msg); - break; - default: - LOGP(DINP, LOGL_NOTICE, "Unknown HSL protocol class 0x%02x\n", hh->proto); - msgb_free(msg); - break; - } - return ret; -} - -static int ts_want_write(struct e1inp_ts *e1i_ts) -{ - e1i_ts->driver.ipaccess.fd.when |= BSC_FD_WRITE; - - return 0; -} - -static void timeout_ts1_write(void *data) -{ - struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; - - /* trigger write of ts1, due to tx delay timer */ - ts_want_write(e1i_ts); -} - -static int handle_ts1_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; - uint8_t proto; - int ret; - - bfd->when &= ~BSC_FD_WRITE; - - /* 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; - } - - switch (sign_link->type) { - case E1INP_SIGN_OML: - proto = IPAC_PROTO_OML; -#ifdef HSL_SR_1_0 - /* HSL uses 0x81 for FOM for some reason */ - if (msg->data[0] == ABIS_OM_MDISC_FOM) - msg->data[0] = ABIS_OM_MDISC_FOM | 0x01; -#endif - break; - case E1INP_SIGN_RSL: - proto = IPAC_PROTO_RSL; - break; - default: - msgb_free(msg); - bfd->when |= BSC_FD_WRITE; /* come back for more msg */ - return -EINVAL; - } - - msg->l2h = msg->data; - ipaccess_prepend_header(msg, sign_link->tei); - - DEBUGP(DMI, "TX %u: %s\n", ts_nr, osmo_hexdump(msg->l2h, msgb_l2len(msg))); - - ret = send(bfd->fd, msg->data, msg->len, 0); - msgb_free(msg); - - /* set tx delay timer for next event */ - e1i_ts->sign.tx_timer.cb = timeout_ts1_write; - e1i_ts->sign.tx_timer.data = e1i_ts; - - /* Reducing this might break the nanoBTS 900 init. */ - osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, e1i_ts->sign.delay); - - return ret; -} - -/* callback from select.c in case one of the fd's can be read/written */ -static int hsl_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; - int rc = 0; - - /* In case of early RSL we might not yet have a line */ - - if (line) - e1i_ts = &line->ts[idx]; - - if (!line || e1i_ts->type == E1INP_TS_TYPE_SIGN) { - if (what & BSC_FD_READ) - rc = handle_ts1_read(bfd); - if (what & BSC_FD_WRITE) - rc = handle_ts1_write(bfd); - } else - LOGP(DINP, LOGL_ERROR, "unknown E1 TS type %u\n", e1i_ts->type); - - return rc; -} - -struct e1inp_driver hsl_driver = { - .name = "HSL", - .want_write = ts_want_write, - .default_delay = 0, -}; - -/* callback of the OML listening filedescriptor */ -static int listen_fd_cb(struct osmo_fd *listen_bfd, unsigned int what) -{ - int ret; - int idx = 0; - int i; - struct e1inp_line *line; - struct e1inp_ts *e1i_ts; - struct osmo_fd *bfd; - struct sockaddr_in sa; - socklen_t sa_len = sizeof(sa); - - if (!(what & BSC_FD_READ)) - return 0; - - ret = accept(listen_bfd->fd, (struct sockaddr *) &sa, &sa_len); - if (ret < 0) { - perror("accept"); - return ret; - } - LOGP(DINP, LOGL_NOTICE, "accept()ed new HSL link from %s\n", - inet_ntoa(sa.sin_addr)); - - line = talloc_zero(tall_bsc_ctx, struct e1inp_line); - if (!line) { - close(ret); - return -ENOMEM; - } - line->driver = &hsl_driver; - //line->driver_data = e1h; - /* create virrtual E1 timeslots for signalling */ - e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); - - /* initialize the fds */ - for (i = 0; i < ARRAY_SIZE(line->ts); ++i) - line->ts[i].driver.ipaccess.fd.fd = -1; - - e1i_ts = &line->ts[idx]; - - bfd = &e1i_ts->driver.ipaccess.fd; - bfd->fd = ret; - bfd->data = line; - bfd->priv_nr = PRIV_OML; - bfd->cb = hsl_fd_cb; - bfd->when = BSC_FD_READ; - ret = osmo_fd_register(bfd); - if (ret < 0) { - LOGP(DINP, LOGL_ERROR, "could not register FD\n"); - close(bfd->fd); - talloc_free(line); - return ret; - } - - return ret; - //return e1inp_line_register(line); -} - -int hsl_setup(struct gsm_network *gsmnet) -{ - int ret; - - e1h = talloc_zero(tall_bsc_ctx, struct hsl_e1_handle); - if (!e1h) - return -ENOMEM; - - e1h->gsmnet = gsmnet; - - /* Listen for connections */ - ret = make_sock(&e1h->listen_fd, IPPROTO_TCP, INADDR_ANY, HSL_TCP_PORT, - 0, listen_fd_cb, NULL); - if (ret < 0) - return ret; - - return 0; -} - -void e1inp_hsl_init(void) -{ - e1inp_driver_register(&hsl_driver); -} -- cgit v1.2.3