226 lines
6.6 KiB
C
226 lines
6.6 KiB
C
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#include <pthread.h>
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#include "../libtimer/timer.h"
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#include "../libselect/select.h"
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#include "../libosmocc/endpoint.h"
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#include "../libosmocc/helper.h"
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#include "../libsample/sample.h"
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#include "../libjitter/jitter.h"
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#include "../libph_socket/ph_socket.h"
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#include "tones.h"
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#define B_MODE_TRANSPARENT 0
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#define B_MODE_HDLC 1
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#define B_STATE_IDLE 0 /* not open */
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#define B_STATE_ACTIVATING 1 /* DL_ESTABLISH sent */
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#define B_STATE_ACTIVE 2 /* channel active */
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#define B_STATE_DEACTIVATING 3 /* DL_RELEASE sent */
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#define B_EVENT_USE 0 /* activate bchannel */
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#define B_EVENT_ACTIVATED 1 /* DL_ESTABLISH received */
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#define B_EVENT_DROP 2 /* deactivate bchannel */
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#define B_EVENT_DEACTIVATED 3 /* DL_RELEASE received */
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#define B_EVENT_TIMEOUT 4 /* timeout happed during (de)activation */
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#define TONES_TYPE_AMERICAN 1
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#define TONES_TYPE_GERMAN 2
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#define TONES_TYPE_OLDGERMAN 3
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#define DIRECTION_ORIGINATOR 0
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#define DIRECTION_TERMINATOR 1
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enum isdn_state {
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ISDN_STATE_IDLE = 0, /* no call */
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ISDN_STATE_IN_SETUP, /* incoming connection */
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ISDN_STATE_OUT_SETUP, /* outgoing connection */
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ISDN_STATE_IN_OVERLAP, /* more informatiopn needed */
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ISDN_STATE_OUT_OVERLAP, /* more informatiopn needed */
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ISDN_STATE_IN_PROCEEDING,/* call is proceeding */
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ISDN_STATE_OUT_PROCEEDING,/* call is proceeding */
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ISDN_STATE_IN_ALERTING, /* call is ringing */
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ISDN_STATE_OUT_ALERTING,/* call is ringing */
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ISDN_STATE_IN_CONNECTING,/* wait for ack after answer */
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ISDN_STATE_OUT_CONNECTING,/* wait for ack after answer */
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ISDN_STATE_CONNECT, /* call is connected and transmission is enabled */
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ISDN_STATE_IN_DISCONNECT,/* incoming disconnected */
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ISDN_STATE_OUT_DISCONNECT,/* outgoing disconnected */
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ISDN_STATE_OUT_RELEASE, /* call released */
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ISDN_STATE_SUSPENDED, /* call suspended */
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};
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struct isdn;
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struct b_timer_inst {
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struct isdn *isdn_ep;
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int index;
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};
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struct msn_list {
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struct msn_list *next;
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char msn[0];
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};
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struct select_channel {
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struct select_channel *next;
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int channel;
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};
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struct isdn;
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struct isdn_b_sock {
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int index;
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struct isdn *isdn_ep;
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struct osmo_fd ofd;
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};
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struct call_list;
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typedef struct isdn {
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struct call_list *call_list;
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struct msn_list *msn_list;
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/* settings */
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char law;
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struct select_channel *out_channel; /* list of outgoing channels to select */
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struct select_channel *in_channel; /* the same for incoming channels */
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int out_channel_exclusive; /* force channel */
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int serving_location; /* who we serve when sending causes towards interface */
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const char *timeouts;
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int tx_delay;
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int local_tones;
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/* osmo-cc */
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struct osmo_cc_endpoint cc_ep;
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/* mISDN */
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char *portname;
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int portnum;
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int ntmode;
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int ptp;
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int pri;
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int l1hold;
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int l2hold;
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int l2sock;
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void *l2inst;
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ph_socket_t *ph_socket;
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pthread_mutex_t upqueue_lock;
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struct mqueue upqueue;
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int upqueue_initialized;
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int upqueue_pipe[2];
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struct osmo_fd upqueue_ofd;
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struct mlayer3 *ml3;
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int los, ais, rdi, slip_rx, slip_tx;
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int l1link; /* current state */
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int l2link; /* current state */
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struct timer l2establish_timer;
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int b_num;
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int b_reserved;
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int b_mode[128];
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int b_state[128];
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struct isdn_b_sock b_sock[128];
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struct call_list *b_call[128];
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struct timer b_timer[128];
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struct b_timer_inst b_timer_inst[128];
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uint8_t b_buffer[128][160];
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int b_buffer_pos[128];
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unsigned char l2mask[16]; /* 128 bits for each tei */
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/* bridging */
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int bridge_possible;
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int bridge_cardnum;
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int bridge_portnum;
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/* clock for tone on hold */
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struct timer clock_timer;
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double last_time_clock;
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} isdn_t;
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typedef struct call_list {
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struct call_list *next;
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isdn_t *isdn_ep;
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/* mISDN states */
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uint32_t l3_pid;
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uint16_t l3_ces;
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/* tone states */
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struct isdn_tone isdn_tone;
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/* osmo-cc states */
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uint32_t cc_callref;
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osmo_cc_session_t *cc_session;
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osmo_cc_session_codec_t *codec;
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const char *sdp;
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char codec_law;
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int codec_negotiated;
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int audio_path;
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/* bchannel states */
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int b_index;
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int b_channel;
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int b_exclusive;
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int b_reserve;
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int b_mode;
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int b_transmitting;
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double b_rx_time;
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/* call states */
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int direction; /* originator or terminator of call */
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enum isdn_state state;
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int any_dialing; /* if any digit was dialed, we track this for dial tone */
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int channel_negotiated;
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int send_local_tones; /* using locally generated tones, because upper layer does not provide them */
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int send_remote_tones; /* using remote tones, as we received a progress indicator 1 or 8 from upper layer */
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int proceeding_sent;
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int sending_complete; /* send proceeding when osmo-cc requests overlap */
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int setup_comp_req_channel_assignment; /* must assign channel on setup comp req */
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uint8_t collect_cause, collect_location;
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int hold; /* if call is on hold */
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int conference_3pty; /* if call is the active call in a 3pty conference */
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int park_len;
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uint8_t park_callid[8];
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/* bridge states */
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int can_bridge; /* last state sent to the server */
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int bridge_enabled; /* last state received by the server */
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int bridge_bank_tx;
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int bridge_slot_tx;
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int bridge_bank_rx;
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int bridge_slot_rx;
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/* jitter buffer for tx and 3pty call */
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jitter_t tx_dejitter;
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jitter_t conf_dejitter;
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} call_t;
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/* channel selection */
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int hunt_bchannel_in(isdn_t *isdn_ep, int channel, int exclusive);
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int hunt_bchannel_out(isdn_t *isdn_ep, int *channel, int *exclusive);
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int open_bchannel_in(call_t *call, int channel, int exclusive);
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int open_bchannel_out(call_t *call, unsigned int cmd, int channel, int exclusive);
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/* isdn instance */
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isdn_t *isdn_create(void);
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void isdn_destroy(isdn_t *isdn_ep);
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int isdn_initialize(isdn_t *isdn_ep, ph_socket_t *ph_socket, char law, const char *portname, int ntmode, int ptp, int layer1hold, int layer2hold, const char *channel_out, const char *channel_in, const char *timeouts, int tx_delay, int local_tones, int serving_location);
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int isdn_open(isdn_t *isdn_ep);
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void isdn_close(isdn_t *isdn_ep);
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void isdn_add_msn(isdn_t *isdn_ep, const char *msn);
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/* call instance */
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call_t *call_create(isdn_t *isdn_ep, int direction, int channel, int exclusive, int mode);
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void call_create_jitter(call_t *call, int data);
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void call_destroy(call_t *call);
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/* channel allocation and handling */
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void bchannel_tone(call_t *call, int tone);
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void bchannel_bridge(call_t *call, int pcm_bridge, int rx_slot, int tx_slot, int rx_bank, int tx_bank);
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void bchannel_event(isdn_t *isdn_ep, int index, int event);
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int seize_bchannel(call_t *call, int channel, int exclusive);
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void drop_bchannel(call_t *call);
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void rtp_receive(struct osmo_cc_session_codec *codec, uint8_t marker, uint16_t sequence_number, uint32_t timestamp, uint32_t ssrc, uint8_t *data, int len);
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void enable_hold_clock(isdn_t *isdn_ep);
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