201 lines
5.0 KiB
C
201 lines
5.0 KiB
C
/*
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* (C) 2010-2011 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2011 by On-Waves
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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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#ifndef mtp_data_h
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#define mtp_data_h
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/timer.h>
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#include <osmocom/core/utils.h>
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struct bsc_data;
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struct mtp_link;
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struct mtp_level_3_mng *mng;
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struct rate_ctr_group;
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struct ss7_application;
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/* MTP Level3 timers */
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/* Timers for SS7 */
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#define MTP_T1 12, 0
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#define MTP_T2 30, 0
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#define START_DELAY 8, 0
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enum ss7_link_type {
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SS7_LTYPE_NONE,
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SS7_LTYPE_UDP,
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SS7_LTYPE_M2UA,
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SS7_LTYPE_M3UA_CLIENT,
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};
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/**
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* The state of the mtp_link in terms of layer3 and upwards
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*/
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struct mtp_link_set {
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struct llist_head entry;
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int nr;
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char *name;
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/**
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* Routing is very limited. We can only forward to one
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* other STP/Endpoint. For ISUP and SCCP we can statically
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* send it to another destination. We need to follow Q.704
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* more properly here.
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* DPC/OPC are the ones for the linkset,
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* sccp_dpc/isup_dpc are where we will send SCCP/ISUP messages
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* sccp_opc/isup_opc are what we announce in the TFP
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*/
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int dpc, opc;
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int sccp_dpc, isup_dpc;
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int sccp_opc, isup_opc;
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int ni;
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int spare;
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/* internal state */
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/* the MTP1 link is up */
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int available;
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int running;
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int sccp_up;
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int linkset_up;
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int last_sls;
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struct llist_head links;
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int nr_links;
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struct mtp_link *slc[16];
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int sltm_once;
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/* ssn map */
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int supported_ssn[256];
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int pcap_fd;
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/* special handling */
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int pass_all_isup;
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/* statistics */
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struct rate_ctr_group *ctrg;
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/* statistics for routing */
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int timeout_t18;
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int timeout_t20;
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struct osmo_timer_list T18;
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struct osmo_timer_list T20;
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/* custom data */
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struct bsc_data *bsc;
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struct ss7_application *app;
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};
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/**
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* One physical link to somewhere. This is the base
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* with the interface used by the mtp_link_set. There
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* will be specific implementations for M2UA, UDP and
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* other transport means.
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*/
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struct mtp_link {
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struct llist_head entry;
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int nr;
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char *name;
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int pcap_fd;
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struct mtp_link_set *set;
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int available;
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struct osmo_timer_list link_activate;
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/* link test routine */
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uint8_t test_ptrn[14];
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int blocked;
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int first_sls;
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int sltm_pending;
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int was_up;
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int slta_misses;
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struct osmo_timer_list t1_timer;
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struct osmo_timer_list t2_timer;
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/* statistics */
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struct rate_ctr_group *ctrg;
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/* callback's to implement */
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int (*write)(struct mtp_link *, struct msgb *msg);
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int (*shutdown)(struct mtp_link *);
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int (*reset)(struct mtp_link *data);
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int (*clear_queue)(struct mtp_link *data);
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/* for M3UA and others.. */
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int skip_link_test;
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/* private data */
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enum ss7_link_type type;
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void *data;
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};
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void mtp_link_set_stop(struct mtp_link_set *set);
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void mtp_link_set_reset(struct mtp_link_set *set);
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int mtp_link_set_data(struct mtp_link *link, struct msgb *msg);
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int mtp_link_handle_data(struct mtp_link *link, struct msgb *msg);
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int mtp_link_set_submit_sccp_data(struct mtp_link_set *set, int sls, const uint8_t *data, unsigned int length);
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int mtp_link_set_submit_isup_data(struct mtp_link_set *set, int sls, const uint8_t *data, unsigned int length);
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void mtp_link_set_init_slc(struct mtp_link_set *set);
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void mtp_link_block(struct mtp_link *link);
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void mtp_link_unblock(struct mtp_link *link);
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/* to be implemented for MSU sending */
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void mtp_link_submit(struct mtp_link *link, struct msgb *msg);
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void mtp_link_set_forward_sccp(struct mtp_link_set *set, struct msgb *msg, int sls);
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void mtp_link_set_forward_isup(struct mtp_link_set *set, struct msgb *msg, int sls);
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void mtp_link_restart(struct mtp_link *link);
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int mtp_link_set_send(struct mtp_link_set *set, struct msgb *msg);
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/* link related routines */
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void mtp_link_down(struct mtp_link *data);
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void mtp_link_up(struct mtp_link *data);
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void mtp_link_start_link_test(struct mtp_link *link);
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void mtp_link_stop_link_test(struct mtp_link *link);
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int mtp_link_slta(struct mtp_link *link, uint16_t l3_len, struct mtp_level_3_mng *mng);
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void mtp_link_failure(struct mtp_link *fail);
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/* internal routines */
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struct msgb *mtp_msg_alloc(struct mtp_link_set *set);
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/* link management */
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struct mtp_link_set *mtp_link_set_alloc(struct bsc_data *bsc);
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struct mtp_link_set *mtp_link_set_num(struct bsc_data *bsc, int num);
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struct mtp_link *mtp_link_alloc(struct mtp_link_set *set);
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struct mtp_link *mtp_link_num(struct mtp_link_set *set, int num);
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/* linkset handling */
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int mtp_link_verified(struct mtp_link *link);
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#endif
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