699 lines
17 KiB
C
699 lines
17 KiB
C
/* main application for hnb-gw part of osmo-iuh */
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/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
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* (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/sctp.h>
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#include <arpa/inet.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/write_queue.h>
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#include <osmocom/ctrl/control_if.h>
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#include <osmocom/ctrl/control_cmd.h>
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#include <osmocom/ctrl/control_vty.h>
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#include <osmocom/ctrl/ports.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/command.h>
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#include <osmocom/vty/ports.h>
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#include <osmocom/netif/stream.h>
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#include <osmocom/ranap/ranap_common.h>
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#include <osmocom/sigtran/protocol/m3ua.h>
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#include <osmocom/sigtran/sccp_sap.h>
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#include <osmocom/iuh/hnbgw.h>
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#include <osmocom/iuh/hnbgw_hnbap.h>
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#include <osmocom/iuh/hnbgw_rua.h>
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#include <osmocom/iuh/hnbgw_cn.h>
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#include <osmocom/iuh/context_map.h>
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static const char * const osmo_hnbgw_copyright =
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"OsmoHNBGW - Osmocom Home Node B Gateway implementation\r\n"
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"Copyright (C) 2016 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>\r\n"
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"Contributions by Daniel Willmann, Harald Welte, Neels Hofmeyr\r\n"
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"License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n"
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"This is free software: you are free to change and redistribute it.\r\n"
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"There is NO WARRANTY, to the extent permitted by law.\r\n";
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static void *tall_hnb_ctx;
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static struct hnb_gw *g_hnb_gw;
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static struct hnb_gw *hnb_gw_create(void *ctx)
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{
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struct hnb_gw *gw = talloc_zero(ctx, struct hnb_gw);
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/* strdup so we can easily talloc_free in the VTY code */
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gw->config.iuh_local_ip = talloc_strdup(gw, HNBGW_LOCAL_IP_DEFAULT);
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gw->config.iuh_local_port = IUH_DEFAULT_SCTP_PORT;
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gw->config.log_prefix_hnb_id = true;
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gw->next_ue_ctx_id = 23;
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INIT_LLIST_HEAD(&gw->hnb_list);
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INIT_LLIST_HEAD(&gw->ue_list);
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context_map_init(gw);
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return gw;
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}
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struct hnb_context *hnb_context_by_id(struct hnb_gw *gw, uint32_t cid)
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{
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struct hnb_context *hnb;
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llist_for_each_entry(hnb, &gw->hnb_list, list) {
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if (hnb->id.cid == cid)
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return hnb;
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}
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return NULL;
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}
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struct hnb_context *hnb_context_by_identity_info(struct hnb_gw *gw, const char *identity_info)
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{
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struct hnb_context *hnb;
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llist_for_each_entry(hnb, &gw->hnb_list, list) {
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if (strcmp(identity_info, hnb->identity_info) == 0)
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return hnb;
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}
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return NULL;
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}
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unsigned hnb_contexts(const struct hnb_gw *gw)
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{
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unsigned num_ctx = 0;
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struct hnb_context *hnb;
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llist_for_each_entry(hnb, &gw->hnb_list, list) {
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num_ctx++;
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}
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return num_ctx;
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}
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struct ue_context *ue_context_by_id(struct hnb_gw *gw, uint32_t id)
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{
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struct ue_context *ue;
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llist_for_each_entry(ue, &gw->ue_list, list) {
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if (ue->context_id == id)
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return ue;
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}
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return NULL;
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}
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struct ue_context *ue_context_by_imsi(struct hnb_gw *gw, const char *imsi)
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{
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struct ue_context *ue;
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llist_for_each_entry(ue, &gw->ue_list, list) {
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if (!strcmp(ue->imsi, imsi))
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return ue;
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}
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return NULL;
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}
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struct ue_context *ue_context_by_tmsi(struct hnb_gw *gw, uint32_t tmsi)
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{
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struct ue_context *ue;
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llist_for_each_entry(ue, &gw->ue_list, list) {
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if (ue->tmsi == tmsi)
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return ue;
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}
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return NULL;
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}
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void ue_context_free_by_hnb(struct hnb_gw *gw, const struct hnb_context *hnb)
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{
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struct ue_context *ue, *tmp;
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llist_for_each_entry_safe(ue, tmp, &gw->ue_list, list) {
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if (ue->hnb == hnb)
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ue_context_free(ue);
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}
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}
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static uint32_t get_next_ue_ctx_id(struct hnb_gw *gw)
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{
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uint32_t id;
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do {
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id = gw->next_ue_ctx_id++;
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} while (ue_context_by_id(gw, id));
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return id;
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}
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struct ue_context *ue_context_alloc(struct hnb_context *hnb, const char *imsi,
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uint32_t tmsi)
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{
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struct ue_context *ue;
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ue = talloc_zero(tall_hnb_ctx, struct ue_context);
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if (!ue)
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return NULL;
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ue->hnb = hnb;
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if (imsi)
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OSMO_STRLCPY_ARRAY(ue->imsi, imsi);
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else
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ue->imsi[0] = '\0';
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ue->tmsi = tmsi;
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ue->context_id = get_next_ue_ctx_id(hnb->gw);
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llist_add_tail(&ue->list, &hnb->gw->ue_list);
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LOGP(DHNBAP, LOGL_INFO, "created UE context: id 0x%x, imsi %s, tmsi 0x%x\n",
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ue->context_id, imsi? imsi : "-", tmsi);
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return ue;
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}
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void ue_context_free(struct ue_context *ue)
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{
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llist_del(&ue->list);
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talloc_free(ue);
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}
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static int hnb_read_cb(struct osmo_stream_srv *conn)
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{
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struct hnb_context *hnb = osmo_stream_srv_get_data(conn);
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struct msgb *msg = msgb_alloc(IUH_MSGB_SIZE, "Iuh rx");
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int rc;
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if (!msg)
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return -ENOMEM;
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/* we store a reference to the HomeNodeB in the msg->dest for the
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* benefit of varoius downstream processing functions */
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msg->dst = hnb;
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rc = osmo_stream_srv_recv(conn, msg);
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if (rc == -EAGAIN) {
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/* Notification received */
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msgb_free(msg);
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return 0;
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} else if (rc < 0) {
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LOGHNB(hnb, DMAIN, LOGL_ERROR, "Error during sctp_recvmsg()\n");
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/* FIXME: clean up after disappeared HNB */
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hnb_context_release(hnb);
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goto out;
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} else if (rc == 0) {
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hnb_context_release(hnb);
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rc = -1;
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goto out;
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} else {
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msgb_put(msg, rc);
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}
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switch (msgb_sctp_ppid(msg)) {
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case IUH_PPI_HNBAP:
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hnb->hnbap_stream = msgb_sctp_stream(msg);
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rc = hnbgw_hnbap_rx(hnb, msg);
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break;
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case IUH_PPI_RUA:
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hnb->rua_stream = msgb_sctp_stream(msg);
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rc = hnbgw_rua_rx(hnb, msg);
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break;
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case IUH_PPI_SABP:
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case IUH_PPI_RNA:
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case IUH_PPI_PUA:
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LOGHNB(hnb, DMAIN, LOGL_ERROR, "Unimplemented SCTP PPID=%lu received\n", msgb_sctp_ppid(msg));
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rc = 0;
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break;
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default:
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LOGHNB(hnb, DMAIN, LOGL_ERROR, "Unknown SCTP PPID=%lu received\n", msgb_sctp_ppid(msg));
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rc = 0;
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break;
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}
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out:
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msgb_free(msg);
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return rc;
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}
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struct hnb_context *hnb_context_alloc(struct hnb_gw *gw, struct osmo_stream_srv_link *link, int new_fd)
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{
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struct hnb_context *ctx;
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ctx = talloc_zero(tall_hnb_ctx, struct hnb_context);
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if (!ctx)
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return NULL;
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INIT_LLIST_HEAD(&ctx->map_list);
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ctx->gw = gw;
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ctx->conn = osmo_stream_srv_create(tall_hnb_ctx, link, new_fd, hnb_read_cb, NULL, ctx);
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if (!ctx->conn) {
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LOGP(DMAIN, LOGL_INFO, "error while creating connection\n");
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talloc_free(ctx);
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return NULL;
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}
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llist_add_tail(&ctx->list, &gw->hnb_list);
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return ctx;
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}
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static const char *umts_cell_id_name(const struct umts_cell_id *ucid)
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{
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static __thread char buf[40];
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snprintf(buf, sizeof(buf), "%u-%u-L%u-R%u-S%u", ucid->mcc, ucid->mnc, ucid->lac, ucid->rac, ucid->sac);
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return buf;
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}
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const char *hnb_context_name(struct hnb_context *ctx)
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{
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if (!ctx)
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return "NULL";
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if (ctx->gw->config.log_prefix_hnb_id)
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return ctx->identity_info;
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else
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return umts_cell_id_name(&ctx->id);
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}
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void hnb_context_release(struct hnb_context *ctx)
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{
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struct hnbgw_context_map *map, *map2;
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/* remove from the list of HNB contexts */
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llist_del(&ctx->list);
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/* deactivate all context maps */
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llist_for_each_entry_safe(map, map2, &ctx->map_list, hnb_list) {
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/* remove it from list, as HNB context will soon be
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* gone. Let's hope the second osmo_llist_del in the
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* map garbage collector works fine? */
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llist_del(&map->hnb_list);
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llist_del(&map->cn_list);
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context_map_deactivate(map);
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}
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ue_context_free_by_hnb(ctx->gw, ctx);
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osmo_stream_srv_destroy(ctx->conn);
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talloc_free(ctx);
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}
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/*! call-back when the listen FD has something to read */
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static int accept_cb(struct osmo_stream_srv_link *srv, int fd)
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{
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struct hnb_gw *gw = osmo_stream_srv_link_get_data(srv);
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struct hnb_context *ctx;
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ctx = hnb_context_alloc(gw, srv, fd);
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if (!ctx)
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return -ENOMEM;
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return 0;
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}
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static const struct log_info_cat log_cat[] = {
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[DMAIN] = {
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.name = "DMAIN", .loglevel = LOGL_NOTICE, .enabled = 1,
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.color = "",
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.description = "Main program",
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},
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[DHNBAP] = {
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.name = "DHNBAP", .loglevel = LOGL_NOTICE, .enabled = 1,
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.color = "",
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.description = "Home Node B Application Part",
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},
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[DRUA] = {
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.name = "DRUA", .loglevel = LOGL_NOTICE, .enabled = 1,
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.color = "",
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.description = "RANAP User Adaptation",
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},
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[DRANAP] = {
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.name = "DRANAP", .loglevel = LOGL_NOTICE, .enabled = 1,
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.color = "",
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.description = "RAN Application Part",
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},
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};
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static const struct log_info hnbgw_log_info = {
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.cat = log_cat,
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.num_cat = ARRAY_SIZE(log_cat),
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};
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static struct vty_app_info vty_info = {
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.name = "OsmoHNBGW",
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.version = PACKAGE_VERSION,
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.go_parent_cb = hnbgw_vty_go_parent,
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};
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static struct {
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int daemonize;
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const char *config_file;
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bool log_disable_color;
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bool log_enable_timestamp;
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int log_level;
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const char *log_category_mask;
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} hnbgw_cmdline_config = {
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0,
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"osmo-hnbgw.cfg",
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false,
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false,
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0,
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NULL,
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};
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static void print_usage()
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{
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printf("Usage: osmo-hnbgw\n");
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}
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static void print_help()
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{
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printf(" -h --help This text.\n");
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printf(" -d option --debug=DHNBAP:DRUA:DRANAP:DMAIN Enable debugging.\n");
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printf(" -D --daemonize Fork the process into a background daemon.\n");
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printf(" -c --config-file filename The config file to use.\n");
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printf(" -s --disable-color\n");
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printf(" -T --timestamp Prefix every log line with a timestamp.\n");
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printf(" -V --version Print the version of OsmoHNBGW.\n");
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printf(" -e --log-level number Set a global loglevel.\n");
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printf("\nVTY reference generation:\n");
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printf(" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n");
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printf(" --vty-ref-xml Generate the VTY reference XML output and exit.\n");
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}
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static void handle_long_options(const char *prog_name, const int long_option)
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{
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static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT;
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switch (long_option) {
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case 1:
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vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg);
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if (vty_ref_mode < 0) {
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fprintf(stderr, "%s: Unknown VTY reference generation "
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"mode '%s'\n", prog_name, optarg);
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exit(2);
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}
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break;
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case 2:
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fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n",
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get_value_string(vty_ref_gen_mode_names, vty_ref_mode),
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get_value_string(vty_ref_gen_mode_desc, vty_ref_mode));
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vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode);
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exit(0);
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default:
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fprintf(stderr, "%s: error parsing cmdline options\n", prog_name);
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exit(2);
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}
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}
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static void handle_options(int argc, char **argv)
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{
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while (1) {
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int option_index = 0, c;
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static int long_option = 0;
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"debug", 1, 0, 'd'},
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{"daemonize", 0, 0, 'D'},
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{"config-file", 1, 0, 'c'},
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{"disable-color", 0, 0, 's'},
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{"timestamp", 0, 0, 'T'},
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{"version", 0, 0, 'V' },
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{"log-level", 1, 0, 'e'},
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{"vty-ref-mode", 1, &long_option, 1},
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{"vty-ref-xml", 0, &long_option, 2},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, "hd:Dc:sTVe:",
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 0:
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handle_long_options(argv[0], long_option);
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break;
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case 'h':
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print_usage();
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print_help();
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exit(0);
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case 's':
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hnbgw_cmdline_config.log_disable_color = true;
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break;
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case 'd':
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hnbgw_cmdline_config.log_category_mask = optarg;
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break;
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case 'D':
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hnbgw_cmdline_config.daemonize = 1;
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break;
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case 'c':
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hnbgw_cmdline_config.config_file = optarg;
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break;
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case 'T':
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hnbgw_cmdline_config.log_enable_timestamp = true;
|
|
break;
|
|
case 'e':
|
|
hnbgw_cmdline_config.log_level = atoi(optarg);
|
|
break;
|
|
case 'V':
|
|
print_version(1);
|
|
exit(0);
|
|
break;
|
|
default:
|
|
/* catch unknown options *as well as* missing arguments. */
|
|
fprintf(stderr, "Error in command line options. Exiting.\n");
|
|
exit(-1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc > optind) {
|
|
fprintf(stderr, "Unsupported positional arguments on command line\n");
|
|
exit(2);
|
|
}
|
|
}
|
|
|
|
CTRL_CMD_DEFINE_RO(hnb_info, "info");
|
|
static int get_hnb_info(struct ctrl_cmd *cmd, void *data)
|
|
{
|
|
struct hnb_context *hnb = data;
|
|
|
|
cmd->reply = talloc_strdup(cmd, hnb->identity_info);
|
|
|
|
return CTRL_CMD_REPLY;
|
|
}
|
|
|
|
CTRL_CMD_DEFINE_RO(hnbs, "num-hnb");
|
|
static int get_hnbs(struct ctrl_cmd *cmd, void *data)
|
|
{
|
|
cmd->reply = talloc_asprintf(cmd, "%u", hnb_contexts(data));
|
|
|
|
return CTRL_CMD_REPLY;
|
|
}
|
|
|
|
int hnb_ctrl_cmds_install()
|
|
{
|
|
int rc = 0;
|
|
|
|
rc |= ctrl_cmd_install(CTRL_NODE_ROOT, &cmd_hnbs);
|
|
rc |= ctrl_cmd_install(CTRL_NODE_HNB, &cmd_hnb_info);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int hnb_ctrl_node_lookup(void *data, vector vline, int *node_type, void **node_data, int *i)
|
|
{
|
|
const char *token = vector_slot(vline, *i);
|
|
struct hnb_context *hnb;
|
|
long num;
|
|
|
|
switch (*node_type) {
|
|
case CTRL_NODE_ROOT:
|
|
if (strcmp(token, "hnb") != 0)
|
|
return 0;
|
|
|
|
(*i)++;
|
|
|
|
if (!ctrl_parse_get_num(vline, *i, &num))
|
|
return -ERANGE;
|
|
|
|
hnb = hnb_context_by_id(data, num);
|
|
if (!hnb)
|
|
return -ENODEV;
|
|
|
|
*node_data = hnb;
|
|
*node_type = CTRL_NODE_HNB;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct osmo_stream_srv_link *srv;
|
|
int rc;
|
|
|
|
tall_hnb_ctx = talloc_named_const(NULL, 0, "hnb_context");
|
|
talloc_asn1_ctx = talloc_named_const(NULL, 1, "asn1_context");
|
|
msgb_talloc_ctx_init(tall_hnb_ctx, 0);
|
|
|
|
g_hnb_gw = hnb_gw_create(tall_hnb_ctx);
|
|
g_hnb_gw->config.rnc_id = 23;
|
|
|
|
rc = osmo_init_logging2(tall_hnb_ctx, &hnbgw_log_info);
|
|
if (rc < 0)
|
|
exit(1);
|
|
|
|
rc = osmo_ss7_init();
|
|
if (rc < 0) {
|
|
LOGP(DMAIN, LOGL_FATAL, "osmo_ss7_init() failed with rc=%d\n", rc);
|
|
exit(1);
|
|
}
|
|
|
|
vty_info.copyright = osmo_hnbgw_copyright;
|
|
vty_init(&vty_info);
|
|
|
|
osmo_ss7_vty_init_asp(tall_hnb_ctx);
|
|
osmo_sccp_vty_init();
|
|
hnbgw_vty_init(g_hnb_gw, tall_hnb_ctx);
|
|
ctrl_vty_init(tall_hnb_ctx);
|
|
logging_vty_add_cmds();
|
|
|
|
/* Handle options after vty_init(), for --version */
|
|
handle_options(argc, argv);
|
|
|
|
rc = vty_read_config_file(hnbgw_cmdline_config.config_file, NULL);
|
|
if (rc < 0) {
|
|
LOGP(DMAIN, LOGL_FATAL, "Failed to parse the config file: '%s'\n",
|
|
hnbgw_cmdline_config.config_file);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* cmdline options take precedence over config file, but if no options
|
|
* were passed we must not override the config file.
|
|
*/
|
|
if (hnbgw_cmdline_config.log_disable_color)
|
|
log_set_use_color(osmo_stderr_target, 0);
|
|
if (hnbgw_cmdline_config.log_category_mask)
|
|
log_parse_category_mask(osmo_stderr_target,
|
|
hnbgw_cmdline_config.log_category_mask);
|
|
if (hnbgw_cmdline_config.log_enable_timestamp)
|
|
log_set_print_timestamp(osmo_stderr_target, 1);
|
|
if (hnbgw_cmdline_config.log_level)
|
|
log_set_log_level(osmo_stderr_target,
|
|
hnbgw_cmdline_config.log_level);
|
|
|
|
rc = telnet_init_dynif(tall_hnb_ctx, g_hnb_gw, vty_get_bind_addr(), OSMO_VTY_PORT_HNBGW);
|
|
if (rc < 0) {
|
|
perror("Error binding VTY port");
|
|
exit(1);
|
|
}
|
|
|
|
g_hnb_gw->ctrl = ctrl_interface_setup_dynip2(g_hnb_gw, ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_HNBGW,
|
|
hnb_ctrl_node_lookup, _LAST_CTRL_NODE_HNB);
|
|
if (!g_hnb_gw->ctrl) {
|
|
LOGP(DMAIN, LOGL_ERROR, "Failed to create CTRL interface on %s:%u\n",
|
|
ctrl_vty_get_bind_addr(), OSMO_CTRL_PORT_HNBGW);
|
|
exit(1);
|
|
} else {
|
|
rc = hnb_ctrl_cmds_install();
|
|
if (rc) {
|
|
LOGP(DMAIN, LOGL_ERROR, "Failed to install CTRL interface commands\n");
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
ranap_set_log_area(DRANAP);
|
|
|
|
rc = hnbgw_cnlink_init(g_hnb_gw, "localhost", M3UA_PORT, "localhost");
|
|
if (rc < 0) {
|
|
LOGP(DMAIN, LOGL_ERROR, "Failed to initialize SCCP link to CN\n");
|
|
exit(1);
|
|
}
|
|
|
|
LOGP(DHNBAP, LOGL_NOTICE, "Using RNC-Id %u\n", g_hnb_gw->config.rnc_id);
|
|
|
|
OSMO_ASSERT(g_hnb_gw->config.iuh_local_ip);
|
|
LOGP(DMAIN, LOGL_NOTICE, "Listening for Iuh at %s %d\n",
|
|
g_hnb_gw->config.iuh_local_ip,
|
|
g_hnb_gw->config.iuh_local_port);
|
|
srv = osmo_stream_srv_link_create(tall_hnb_ctx);
|
|
if (!srv) {
|
|
perror("cannot create server");
|
|
exit(1);
|
|
}
|
|
osmo_stream_srv_link_set_data(srv, g_hnb_gw);
|
|
osmo_stream_srv_link_set_proto(srv, IPPROTO_SCTP);
|
|
osmo_stream_srv_link_set_nodelay(srv, true);
|
|
osmo_stream_srv_link_set_addr(srv, g_hnb_gw->config.iuh_local_ip);
|
|
osmo_stream_srv_link_set_port(srv, g_hnb_gw->config.iuh_local_port);
|
|
osmo_stream_srv_link_set_accept_cb(srv, accept_cb);
|
|
|
|
if (osmo_stream_srv_link_open(srv) < 0) {
|
|
perror("Cannot open server");
|
|
exit(1);
|
|
}
|
|
g_hnb_gw->iuh = srv;
|
|
|
|
if (hnbgw_cmdline_config.daemonize) {
|
|
rc = osmo_daemonize();
|
|
if (rc < 0) {
|
|
perror("Error during daemonize");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
while (1) {
|
|
rc = osmo_select_main(0);
|
|
if (rc < 0)
|
|
exit(3);
|
|
}
|
|
|
|
/* not reached */
|
|
exit(0);
|
|
}
|