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mISDN.cpp
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/*****************************************************************************\
** **
** Linux Call Router **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** **
** mISDN port abstraction for dss1 **
** **
\*****************************************************************************/
#include "main.h"
#include "myisdn.h"
#include <mISDN/q931.h>
#undef offsetof
#ifdef __compiler_offsetof
#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
#else
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#ifndef container_of
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#endif
// timeouts if activating/deactivating response from mISDN got lost
#define B_TIMER_ACTIVATING 1 // seconds
#define B_TIMER_DEACTIVATING 1 // seconds
/* list of mISDN ports */
struct mISDNport *mISDNport_first;
/* noise randomizer */
unsigned char mISDN_rand[256];
int mISDN_rand_count = 0;
#ifdef OLD_MT_ASSIGN
unsigned int mt_assign_pid = ~0;
#endif
int mISDNsocket = -1;
static int upqueue_pipe[2];
static struct lcr_fd upqueue_fd;
int upqueue_avail = 0;
static int mISDN_upqueue(struct lcr_fd *fd, unsigned int what, void *instance, int i);
static int mISDN_timeout(struct lcr_timer *timer, void *instance, int i);
static int my_mISDNlib_debug(const char *file, int line, const char *func, int level, const char *fmt, va_list va)
{
int ret = 0;
if (debug_fp > 0)
ret = vfprintf(debug_fp, fmt, va);
return ret;
}
static struct mi_ext_fn_s myfn;
int mISDN_initialize(void)
{
char filename[256];
int ver;
/* try to open raw socket to check kernel */
mISDNsocket = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE);
if (mISDNsocket < 0) {
fprintf(stderr, "Cannot open mISDN due to '%s'. (Does your Kernel support socket based mISDN? Protocol family is %d.)\n", strerror(errno), PF_ISDN);
return(-1);
}
/* init mlayer3 */
// set debug printout function
myfn.prt_debug = my_mISDNlib_debug;
ver = init_layer3(4, &myfn); // buffer of 4
/* open debug, if enabled and not only stack debugging */
if (options.deb) {
SPRINT(filename, "%s/debug.log", LOG_DIR);
debug_fp = fopen(filename, "a");
}
if (options.deb & DEBUG_STACK)
mISDN_set_debug_level(0xfffffeff);
else
mISDN_set_debug_level(0);
if (pipe(upqueue_pipe) < 0)
FATAL("Failed to open pipe\n");
memset(&upqueue_fd, 0, sizeof(upqueue_fd));
upqueue_fd.fd = upqueue_pipe[0];
register_fd(&upqueue_fd, LCR_FD_READ, mISDN_upqueue, NULL, 0);
return(0);
}
void mISDN_deinitialize(void)
{
cleanup_layer3();
if (debug_fp)
fclose(debug_fp);
debug_fp = NULL;
if (mISDNsocket > -1)
close(mISDNsocket);
if (upqueue_fd.inuse) {
unregister_fd(&upqueue_fd);
close(upqueue_pipe[0]);
close(upqueue_pipe[1]);
}
upqueue_avail = 0;
}
int load_timer(struct lcr_timer *timer, void *instance, int index);
/*
* constructor
*/
PmISDN::PmISDN(int type, mISDNport *mISDNport, char *portname, struct port_settings *settings, int channel, int exclusive, int mode) : Port(type, portname, settings)
{
p_m_mISDNport = mISDNport;
p_m_portnum = mISDNport->portnum;
p_m_b_index = -1;
p_m_b_channel = 0;
p_m_b_exclusive = 0;
p_m_b_reserve = 0;
p_m_b_mode = mode;
p_m_hold = 0;
p_m_tx_gain = mISDNport->ifport->interface->tx_gain;
p_m_rx_gain = mISDNport->ifport->interface->rx_gain;
p_m_conf = 0;
p_m_mute = 0;
p_m_txdata = 0;
p_m_delay = 0;
p_m_tx_dejitter = 0;
p_m_echo = 0;
p_m_tone = 0;
p_m_rxoff = 0;
p_m_inband_send_on = 0;
p_m_inband_receive_on = 0;
p_m_dtmf = !mISDNport->ifport->nodtmf;
memset(&p_m_timeout, 0, sizeof(p_m_timeout));
add_timer(&p_m_timeout, mISDN_timeout, this, 0);
p_m_remote_ref = 0; /* channel shall be exported to given remote */
p_m_remote_id = 0; /* remote admin socket */
SCPY(p_m_pipeline, mISDNport->ifport->interface->pipeline);
/* audio */
memset(&p_m_loadtimer, 0, sizeof(p_m_loadtimer));
add_timer(&p_m_loadtimer, load_timer, this, 0);
p_m_load = 0;
p_m_last_tv_sec = 0;
/* crypt */
p_m_crypt = 0;
p_m_crypt_listen = 0;
p_m_crypt_msg_loops = 0;
p_m_crypt_msg_loops = 0;
p_m_crypt_msg_len = 0;
p_m_crypt_msg[0] = '\0';
p_m_crypt_msg_current = 0;
p_m_crypt_key_len = 0;
p_m_crypt_listen = 0;
p_m_crypt_listen_state = 0;
p_m_crypt_listen_len = 0;
p_m_crypt_listen_msg[0] = '\0';
p_m_crypt_listen_crc = 0;
if (mISDNport->ifport->interface->bf_len >= 4 && mISDNport->ifport->interface->bf_len <= 56) {
memcpy(p_m_crypt_key, mISDNport->ifport->interface->bf_key, p_m_crypt_key_len);
p_m_crypt_key_len = mISDNport->ifport->interface->bf_len;
p_m_crypt = 1;
}
/* if any channel requested by constructor */
if (channel == CHANNEL_ANY) {
/* reserve channel */
p_m_b_reserve = 1;
mISDNport->b_reserved++;
}
/* reserve channel */
if (channel > 0) // only if constructor was called with a channel resevation
seize_bchannel(channel, exclusive);
/* we increase the number of objects: */
mISDNport->use++;
PDEBUG(DEBUG_ISDN, "Created new mISDNPort(%s). Currently %d objects use, port #%d\n", portname, mISDNport->use, p_m_portnum);
//inband_receive_on();
}
/*
* destructor
*/
PmISDN::~PmISDN()
{
struct lcr_msg *message;
del_timer(&p_m_timeout);
del_timer(&p_m_loadtimer);
/* remove bchannel relation */
drop_bchannel();
/* release epoint */
while (p_epointlist) {
PDEBUG(DEBUG_ISDN, "destroy mISDNPort(%s). endpoint still exists, releaseing.\n", p_name);
message = message_create(p_serial, p_epointlist->epoint_id, PORT_TO_EPOINT, MESSAGE_RELEASE);
message->param.disconnectinfo.cause = 16;
message->param.disconnectinfo.location = LOCATION_PRIVATE_LOCAL;
message_put(message);
/* remove from list */
free_epointlist(p_epointlist);
}
/* we decrease the number of objects: */
p_m_mISDNport->use--;
PDEBUG(DEBUG_ISDN, "destroyed mISDNPort(%s). Currently %d objects\n", p_name, p_m_mISDNport->use);
}
/*
* trace
*/
void chan_trace_header(struct mISDNport *mISDNport, class PmISDN *port, const char *msgtext, int direction)
{
/* init trace with given values */
start_trace(mISDNport?mISDNport->portnum:-1,
(mISDNport)?((mISDNport->ifport)?mISDNport->ifport->interface:NULL):NULL,
port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
port?port->p_dialinginfo.id:NULL,
direction,
CATEGORY_CH,
port?port->p_serial:0,
msgtext);
}
/*
* layer trace header
*/
static struct isdn_message {
const char *name;
unsigned int value;
} isdn_message[] = {
{"PH_ACTIVATE", L1_ACTIVATE_REQ},
{"PH_DEACTIVATE", L1_DEACTIVATE_REQ},
{"DL_ESTABLISH", L2_ESTABLISH_REQ},
{"DL_RELEASE", L2_RELEASE_REQ},
{"UNKNOWN", L3_UNKNOWN_REQ},
{"MT_TIMEOUT", L3_TIMEOUT_REQ},
{"MT_SETUP", L3_SETUP_REQ},
{"MT_SETUP_ACK", L3_SETUP_ACKNOWLEDGE_REQ},
{"MT_PROCEEDING", L3_PROCEEDING_REQ},
{"MT_ALERTING", L3_ALERTING_REQ},
{"MT_CONNECT", L3_CONNECT_REQ},
{"MT_CONNECT_ACK", L3_CONNECT_ACKNOWLEDGE_REQ},
{"MT_DISCONNECT", L3_DISCONNECT_REQ},
{"MT_RELEASE", L3_RELEASE_REQ},
{"MT_RELEASE_COMP", L3_RELEASE_COMPLETE_REQ},
{"MT_INFORMATION", L3_INFORMATION_REQ},
{"MT_PROGRESS", L3_PROGRESS_REQ},
{"MT_NOTIFY", L3_NOTIFY_REQ},
{"MT_SUSPEND", L3_SUSPEND_REQ},
{"MT_SUSPEND_ACK", L3_SUSPEND_ACKNOWLEDGE_REQ},
{"MT_SUSPEND_REJ", L3_SUSPEND_REJECT_REQ},
{"MT_RESUME", L3_RESUME_REQ},
{"MT_RESUME_ACK", L3_RESUME_ACKNOWLEDGE_REQ},
{"MT_RESUME_REJ", L3_RESUME_REJECT_REQ},
{"MT_HOLD", L3_HOLD_REQ},
{"MT_HOLD_ACK", L3_HOLD_ACKNOWLEDGE_REQ},
{"MT_HOLD_REJ", L3_HOLD_REJECT_REQ},
{"MT_RETRIEVE", L3_RETRIEVE_REQ},
{"MT_RETRIEVE_ACK", L3_RETRIEVE_ACKNOWLEDGE_REQ},
{"MT_RETRIEVE_REJ", L3_RETRIEVE_REJECT_REQ},
{"MT_FACILITY", L3_FACILITY_REQ},
{"MT_STATUS", L3_STATUS_REQ},
{"MT_RESTART", L3_RESTART_REQ},
{"MT_NEW_L3ID", L3_NEW_L3ID_REQ},
{"MT_RELEASE_L3ID", L3_RELEASE_L3ID_REQ},
{NULL, 0},
};
static const char *isdn_prim[4] = {
" REQUEST",
" CONFIRM",
" INDICATION",
" RESPONSE",
};
void l1l2l3_trace_header(struct mISDNport *mISDNport, class PmISDN *port, unsigned int msg, int direction)
{
int i;
char msgtext[64];
SCPY(msgtext, "<<UNKNOWN MESSAGE>>");
/* select message and primitive text */
i = 0;
while(isdn_message[i].name) {
// if (msg == L3_NOTIFY_REQ) printf("val = %x %s\n", isdn_message[i].value, isdn_message[i].name);
if (isdn_message[i].value == (msg&0xffffff00)) {
SCPY(msgtext, isdn_message[i].name);
break;
}
i++;
}
SCAT(msgtext, isdn_prim[msg&0x00000003]);
/* add direction */
if (direction && (msg&0xffffff00)!=L3_NEW_L3ID_REQ && (msg&0xffffff00)!=L3_RELEASE_L3ID_REQ) {
if (mISDNport) {
if (mISDNport->ntmode) {
if (direction == DIRECTION_OUT)
SCAT(msgtext, " N->U");
else
SCAT(msgtext, " N<-U");
} else {
if (direction == DIRECTION_OUT)
SCAT(msgtext, " U->N");
else
SCAT(msgtext, " U<-N");
}
}
}
/* init trace with given values */
start_trace(mISDNport?mISDNport->portnum:-1,
mISDNport?(mISDNport->ifport?mISDNport->ifport->interface:NULL):NULL,
port?numberrize_callerinfo(port->p_callerinfo.id, port->p_callerinfo.ntype, options.national, options.international):NULL,
port?port->p_dialinginfo.id:NULL,
direction,
CATEGORY_CH,
port?port->p_serial:0,
msgtext);
}
/*
* send control information to the channel (dsp-module)
*/
void ph_control(struct mISDNport *mISDNport, class PmISDN *isdnport, int sock, unsigned int c1, unsigned int c2, const char *trace_name, int trace_value)
{
unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+sizeof(int)];
struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
int ret;
if (sock < 0)
return;
ctrl->prim = PH_CONTROL_REQ;
ctrl->id = 0;
*d++ = c1;
*d++ = c2;
ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)*2, 0, NULL, 0);
if (ret <= 0)
PERROR("Failed to send to socket %d\n", sock);
chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
if (c1 == DSP_CONF_JOIN)
add_trace(trace_name, NULL, "0x%08x", trace_value);
else
add_trace(trace_name, NULL, "%d", trace_value);
end_trace();
}
void ph_control_block(struct mISDNport *mISDNport, class PmISDN *isdnport, int sock, unsigned int c1, void *c2, int c2_len, const char *trace_name, int trace_value)
{
unsigned char buffer[MISDN_HEADER_LEN+sizeof(int)+c2_len];
struct mISDNhead *ctrl = (struct mISDNhead *)buffer;
unsigned int *d = (unsigned int *)(buffer+MISDN_HEADER_LEN);
int ret;
if (sock < 0)
return;
ctrl->prim = PH_CONTROL_REQ;
ctrl->id = 0;
*d++ = c1;
memcpy(d, c2, c2_len);
ret = sendto(sock, buffer, MISDN_HEADER_LEN+sizeof(int)+c2_len, 0, NULL, 0);
if (ret <= 0)
PERROR("Failed to send to socket %d\n", sock);
chan_trace_header(mISDNport, isdnport, "BCHANNEL control", DIRECTION_OUT);
add_trace(trace_name, NULL, "%d", trace_value);
end_trace();
}
static int b_sock_callback(struct lcr_fd *fd, unsigned int what, void *instance, int i);
/*
* subfunction for bchannel_event
* create stack
*/
static int _bchannel_create(struct mISDNport *mISDNport, int i)
{
int ret;
struct sockaddr_mISDN addr;
if (mISDNport->b_sock[i].inuse) {
PERROR("Error: Socket already created for index %d\n", i);
return(0);
}
/* open socket */
//#warning testing without DSP
// mISDNport->b_sock[i].fd = socket(PF_ISDN, SOCK_DGRAM, (mISDNport->b_mode[i]==B_MODE_HDLC)?ISDN_P_B_HDLC:ISDN_P_B_RAW);
mISDNport->b_sock[i].fd = socket(PF_ISDN, SOCK_DGRAM, (mISDNport->b_mode[i]==B_MODE_HDLC)?ISDN_P_B_L2DSPHDLC:ISDN_P_B_L2DSP);
if (mISDNport->b_sock[i].fd < 0) {
PERROR("Error: Failed to open bchannel-socket for index %d with mISDN-DSP layer. Did you load mISDN_dsp.ko?\n", i);
return(0);
}
/* register callback for read */
register_fd(&mISDNport->b_sock[i], LCR_FD_READ, b_sock_callback, mISDNport, i);
/* bind socket to bchannel */
addr.family = AF_ISDN;
addr.dev = mISDNport->portnum;
addr.channel = i+1+(i>=15);
ret = bind(mISDNport->b_sock[i].fd, (struct sockaddr *)&addr, sizeof(addr));
if (ret < 0) {
PERROR("Error: Failed to bind bchannel-socket for index %d with mISDN-DSP layer (errno=%d). Did you load mISDN_dsp.ko?\n", i, errno);
close(mISDNport->b_sock[i].fd);
unregister_fd(&mISDNport->b_sock[i]);
return(0);
}
chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL create socket", DIRECTION_OUT);
add_trace("channel", NULL, "%d", i+1+(i>=15));
add_trace("socket", NULL, "%d", mISDNport->b_sock[i].fd);
end_trace();
return(1);
}
/*
* subfunction for bchannel_event
* activate / deactivate request
*/
static void _bchannel_activate(struct mISDNport *mISDNport, int i, int activate, int timeout)
{
struct mISDNhead act;
int ret;
if (!mISDNport->b_sock[i].inuse)
return;
act.prim = (activate)?PH_ACTIVATE_REQ:PH_DEACTIVATE_REQ;
act.id = 0;
ret = sendto(mISDNport->b_sock[i].fd, &act, MISDN_HEADER_LEN, 0, NULL, 0);
if (ret <= 0)
PERROR("Failed to send to socket %d\n", mISDNport->b_sock[i].fd);
/* trace */
chan_trace_header(mISDNport, mISDNport->b_port[i], activate ? "BCHANNEL activate" : "BCHANNEL deactivate", DIRECTION_OUT);
add_trace("channel", NULL, "%d", i+1+(i>=15));
if (timeout)
add_trace("event", NULL, "timeout recovery");
end_trace();
}
/*
* subfunction for bchannel_event
* set features
*/
static void _bchannel_configure(struct mISDNport *mISDNport, int i)
{
struct PmISDN *port;
int handle, mode;
if (!mISDNport->b_sock[i].inuse)
return;
handle = mISDNport->b_sock[i].fd;
port = mISDNport->b_port[i];
mode = mISDNport->b_mode[i];
if (!port) {
PERROR("bchannel index i=%d not associated with a port object\n", i);
return;
}
/* set dsp features */
if (port->p_m_txdata)
ph_control(mISDNport, port, handle, (port->p_m_txdata)?DSP_TXDATA_ON:DSP_TXDATA_OFF, 0, "DSP-TXDATA", port->p_m_txdata);
if (port->p_m_delay && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DSP_DELAY, port->p_m_delay, "DSP-DELAY", port->p_m_delay);
if (port->p_m_tx_dejitter && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DSP_TX_DEJITTER, port->p_m_tx_dejitter, "DSP-TX_DEJITTER", port->p_m_tx_dejitter);
if (port->p_m_tx_gain && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DSP_VOL_CHANGE_TX, port->p_m_tx_gain, "DSP-TX_GAIN", port->p_m_tx_gain);
if (port->p_m_rx_gain && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DSP_VOL_CHANGE_RX, port->p_m_rx_gain, "DSP-RX_GAIN", port->p_m_rx_gain);
if (port->p_m_pipeline[0] && mode == B_MODE_TRANSPARENT)
ph_control_block(mISDNport, port, handle, DSP_PIPELINE_CFG, port->p_m_pipeline, strlen(port->p_m_pipeline)+1, "DSP-PIPELINE", 0);
if (port->p_m_conf && !port->p_m_mute)
ph_control(mISDNport, port, handle, DSP_CONF_JOIN, port->p_m_conf, "DSP-CONF", port->p_m_conf);
if (port->p_m_echo)
ph_control(mISDNport, port, handle, DSP_ECHO_ON, 0, "DSP-ECHO", 1);
if (port->p_m_tone && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DSP_TONE_PATT_ON, port->p_m_tone, "DSP-TONE", port->p_m_tone);
if (port->p_m_rxoff)
ph_control(mISDNport, port, handle, DSP_RECEIVE_OFF, 0, "DSP-RXOFF", 1);
// if (port->p_m_txmix && mode == B_MODE_TRANSPARENT)
// ph_control(mISDNport, port, handle, DSP_MIX_ON, 0, "DSP-MIX", 1);
if (port->p_m_dtmf && mode == B_MODE_TRANSPARENT)
ph_control(mISDNport, port, handle, DTMF_TONE_START, 0, "DSP-DTMF", 1);
if (port->p_m_crypt && mode == B_MODE_TRANSPARENT)
ph_control_block(mISDNport, port, handle, DSP_BF_ENABLE_KEY, port->p_m_crypt_key, port->p_m_crypt_key_len, "DSP-CRYPT", port->p_m_crypt_key_len);
}
void PmISDN::set_conf(int oldconf, int newconf)
{
if (oldconf != newconf) {
PDEBUG(DEBUG_BCHANNEL, "we change conference from conf=%d to conf=%d.\n", oldconf, newconf);
if (p_m_b_index > -1)
if (p_m_mISDNport->b_state[p_m_b_index] == B_STATE_ACTIVE)
ph_control(p_m_mISDNport, this, p_m_mISDNport->b_sock[p_m_b_index].fd, (newconf)?DSP_CONF_JOIN:DSP_CONF_SPLIT, newconf, "DSP-CONF", newconf);
} else
PDEBUG(DEBUG_BCHANNEL, "we already have conf=%d.\n", newconf);
}
/*
* subfunction for bchannel_event
* destroy stack
*/
static void _bchannel_destroy(struct mISDNport *mISDNport, int i)
{
if (!mISDNport->b_sock[i].inuse)
return;
chan_trace_header(mISDNport, mISDNport->b_port[i], "BCHANNEL remove socket", DIRECTION_OUT);
add_trace("channel", NULL, "%d", i+1+(i>=15));
add_trace("socket", NULL, "%d", mISDNport->b_sock[i].fd);
end_trace();
close(mISDNport->b_sock[i].fd);
unregister_fd(&mISDNport->b_sock[i]);
}
/*
bchannel procedure
------------------
A bchannel goes through the following states in this order:
- B_STATE_IDLE
No one is using the bchannel.
It is available and not linked to Port class, nor reserved.
- B_STATE_ACTIVATING
The bchannel stack is created and an activation request is sent.
It MAY be linked to Port class, but already unlinked due to Port class removal.
- B_STATE_ACTIVE
The bchannel is active and cofigured to the Port class needs.
Also it is linked to a Port class, otherwhise it would be deactivated.
- B_STATE_DEACTIVATING
The bchannel is in deactivating state, due to deactivation request.
It may be linked to a Port class, that likes to reactivate it.
- B_STATE_IDLE
See above.
After deactivating bchannel, and if not used, the bchannel becomes idle again.
Also the bchannel may be exported, but only if the state is or becomes idle:
- B_STATE_EXPORTING
The bchannel assignment has been sent to the remove application.
- B_STATE_REMOTE
The bchannel assignment is acknowledged by the remote application.
- B_STATE_IMPORTING
The bchannel is re-imported by mISDN port object.
- B_STATE_IDLE
See above.
After re-importing bchannel, and if not used, the bchannel becomes idle again.
A bchannel can have the following events:
- B_EVENT_USE
A bchannel is required by a Port class.
- B_EVENT_ACTIVATED
The bchannel beomes active.
- B_EVENT_DROP
The bchannel is not required by Port class anymore
- B_EVENT_DEACTIVATED
The bchannel becomes inactive.
- B_EVENT_EXPORTED
The bchannel is now used by remote application.
- B_EVENT_IMPORTED
The bchannel is not used by remote application.
- B_EVENT_EXPORTREQUEST
The bchannel shall be exported to the remote application.
- B_EVENT_IMPORTREQUEST
The bchannel is released from the remote application.
All actions taken on these events depend on the current bchannel's state and if it is linked to a Port class.
if an export request is receive by remote application, p_m_remote_* is set.
the b_remote_*[index] indicates if and where the channel is exported to. (set from the point on, where export is initiated, until imported is acknowledged.)
- set on export request from remote application (if port is assigned)
- set on channel use, if requested by remote application (p_m_remote_*)
- cleared on drop request
the bchannel will be exported with ref and stack given. remote application uses the ref to link bchannel to the call.
the bchannel will be imported with stack given only. remote application must store stack id with the bchannel process.
the bchannel import/export is acknowledged with stack given.
if exporting, b_remote_*[index] is set to the remote socket id.
if importing has been acknowledged. b_remote_*[index] is cleared.
*/
/*
* process bchannel events
* - mISDNport is a pointer to the port's structure
* - i is the index of the bchannel
* - event is the B_EVENT_* value
* - port is the PmISDN class pointer
*/
void bchannel_event(struct mISDNport *mISDNport, int i, int event)
{
class PmISDN *b_port = mISDNport->b_port[i];
int state = mISDNport->b_state[i];
int timer = -1; // no change
unsigned int p_m_remote_ref = 0;
unsigned int p_m_remote_id = 0;
int p_m_tx_gain = 0;
int p_m_rx_gain = 0;
char *p_m_pipeline = NULL;
unsigned char *p_m_crypt_key = NULL;
int p_m_crypt_key_len = 0;
int p_m_crypt_key_type = 0;
unsigned int portid = (mISDNport->portnum<<8) + i+1+(i>=15);
if (b_port) {
p_m_remote_id = b_port->p_m_remote_id;
p_m_remote_ref = b_port->p_m_remote_ref;
p_m_tx_gain = b_port->p_m_tx_gain;
p_m_rx_gain = b_port->p_m_rx_gain;
p_m_pipeline = b_port->p_m_pipeline;
p_m_crypt_key = b_port->p_m_crypt_key;
p_m_crypt_key_len = b_port->p_m_crypt_key_len;
p_m_crypt_key_type = /*b_port->p_m_crypt_key_type*/1;
}
switch(event) {
case B_EVENT_USE:
/* port must be linked in order to allow activation */
if (!b_port)
FATAL("bchannel must be linked to a Port class\n");
switch(state) {
case B_STATE_IDLE:
if (p_m_remote_ref) {
/* export bchannel */
message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "assign");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_EXPORTING;
mISDNport->b_remote_id[i] = p_m_remote_id;
mISDNport->b_remote_ref[i] = p_m_remote_ref;
} else {
/* create stack and send activation request */
if (_bchannel_create(mISDNport, i)) {
_bchannel_activate(mISDNport, i, 1, 0);
state = B_STATE_ACTIVATING;
timer = B_TIMER_ACTIVATING;
}
}
break;
case B_STATE_ACTIVATING:
case B_STATE_EXPORTING:
/* do nothing, because it is already activating */
break;
case B_STATE_DEACTIVATING:
case B_STATE_IMPORTING:
/* do nothing, because we must wait until we can reactivate */
break;
default:
/* problems that might ocurr:
* B_EVENT_USE is received when channel already in use.
* bchannel exported, but not freed by other port
*/
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_EXPORTREQUEST:
/* special case where the bchannel is requested by remote */
if (!p_m_remote_ref) {
PERROR("export request without remote channel set, please correct.\n");
break;
}
switch(state) {
case B_STATE_IDLE:
/* in case, the bchannel is exported right after seize_bchannel */
/* export bchannel */
/* p_m_remote_id is set, when this event happens. */
message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "assign");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_EXPORTING;
mISDNport->b_remote_id[i] = p_m_remote_id;
mISDNport->b_remote_ref[i] = p_m_remote_ref;
break;
case B_STATE_ACTIVATING:
case B_STATE_EXPORTING:
/* do nothing, because it is already activating */
break;
case B_STATE_DEACTIVATING:
case B_STATE_IMPORTING:
/* do nothing, because we must wait until we can reactivate */
break;
case B_STATE_ACTIVE:
/* bchannel is active, so we deactivate */
_bchannel_activate(mISDNport, i, 0, 0);
state = B_STATE_DEACTIVATING;
timer = B_TIMER_DEACTIVATING;
break;
default:
/* problems that might ocurr:
* ... when channel already in use.
* bchannel exported, but not freed by other port
*/
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_IMPORTREQUEST:
/* special case where the bchannel is released by remote */
if (p_m_remote_ref) {
PERROR("import request with remote channel set, please correct.\n");
break;
}
switch(state) {
case B_STATE_IDLE:
case B_STATE_ACTIVE:
/* bchannel is not exported */
break;
case B_STATE_ACTIVATING:
case B_STATE_EXPORTING:
/* do nothing because we must wait until bchanenl is active before deactivating */
break;
case B_STATE_REMOTE:
/* bchannel is exported, so we re-import */
message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "remove");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_IMPORTING;
break;
case B_STATE_DEACTIVATING:
case B_STATE_IMPORTING:
/* we may have taken an already deactivating bchannel, but do not require it anymore, so we do nothing */
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_ACTIVATED:
timer = 0;
switch(state) {
case B_STATE_ACTIVATING:
if (b_port && !p_m_remote_id) {
/* bchannel is active and used by Port class, so we configure bchannel */
_bchannel_configure(mISDNport, i);
state = B_STATE_ACTIVE;
b_port->p_m_load = 0;
} else {
/* bchannel is active, but exported OR not used anymore (or has wrong stack config), so we deactivate */
_bchannel_activate(mISDNport, i, 0, 0);
state = B_STATE_DEACTIVATING;
timer = B_TIMER_DEACTIVATING;
}
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_EXPORTED:
switch(state) {
case B_STATE_EXPORTING:
if (b_port && p_m_remote_ref && p_m_remote_ref==mISDNport->b_remote_ref[i]) {
/* remote export done */
state = B_STATE_REMOTE;
} else {
/* bchannel is now exported, but we need bchannel back
* OR bchannel is not used anymore
* OR bchannel has been exported to an obsolete ref,
* so reimport, to later export to new remote */
message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "remove");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_IMPORTING;
}
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_DROP:
if (!b_port)
FATAL("bchannel must be linked to a Port class\n");
switch(state) {
case B_STATE_IDLE:
/* bchannel is idle due to an error, so we do nothing */
break;
case B_STATE_ACTIVATING:
case B_STATE_EXPORTING:
/* do nothing because we must wait until bchanenl is active before deactivating */
break;
case B_STATE_ACTIVE:
/* bchannel is active, so we deactivate */
_bchannel_activate(mISDNport, i, 0, 0);
state = B_STATE_DEACTIVATING;
timer = B_TIMER_DEACTIVATING;
break;
case B_STATE_REMOTE:
/* bchannel is exported, so we re-import */
message_bchannel_to_remote(mISDNport->b_remote_id[i], 0, BCHANNEL_REMOVE, portid, 0,0,0,0,0,0, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "remove");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_IMPORTING;
break;
case B_STATE_DEACTIVATING:
case B_STATE_IMPORTING:
/* we may have taken an already deactivating bchannel, but do not require it anymore, so we do nothing */
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_DEACTIVATED:
timer = 0;
switch(state) {
case B_STATE_IDLE:
/* ignore due to deactivation confirm after unloading */
break;
case B_STATE_DEACTIVATING:
_bchannel_destroy(mISDNport, i);
state = B_STATE_IDLE;
if (b_port) {
/* bchannel is now deactivate, but is requied by Port class, so we reactivate / export */
if (p_m_remote_ref) {
message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "assign");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_EXPORTING;
mISDNport->b_remote_id[i] = p_m_remote_id;
mISDNport->b_remote_ref[i] = p_m_remote_ref;
} else {
if (_bchannel_create(mISDNport, i)) {
_bchannel_activate(mISDNport, i, 1, 0);
state = B_STATE_ACTIVATING;
timer = B_TIMER_ACTIVATING;
}
}
}
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
case B_EVENT_IMPORTED:
switch(state) {
case B_STATE_IMPORTING:
state = B_STATE_IDLE;
mISDNport->b_remote_id[i] = 0;
mISDNport->b_remote_ref[i] = 0;
if (b_port) {
/* bchannel is now imported, but is requied by Port class, so we reactivate / export */
if (p_m_remote_ref) {
message_bchannel_to_remote(p_m_remote_id, p_m_remote_ref, BCHANNEL_ASSIGN, portid, p_m_tx_gain, p_m_rx_gain, p_m_pipeline, p_m_crypt_key, p_m_crypt_key_len, p_m_crypt_key_type, 0);
chan_trace_header(mISDNport, b_port, "MESSAGE_BCHANNEL (to remote application)", DIRECTION_NONE);
add_trace("type", NULL, "assign");
add_trace("channel", NULL, "%d.%d", portid>>8, portid&0xff);
end_trace();
state = B_STATE_EXPORTING;
mISDNport->b_remote_id[i] = p_m_remote_id;
mISDNport->b_remote_ref[i] = p_m_remote_ref;
} else {
if (_bchannel_create(mISDNport, i)) {
_bchannel_activate(mISDNport, i, 1, 0);
state = B_STATE_ACTIVATING;
timer = B_TIMER_ACTIVATING;
}
}
}
break;
default:
/* ignore, because not assigned */
;
}
break;
case B_EVENT_TIMEOUT:
timer = 0;
switch(state) {
case B_STATE_IDLE:
/* ignore due to deactivation confirm after unloading */
break;
case B_STATE_ACTIVATING:
_bchannel_activate(mISDNport, i, 1, 1);
timer = B_TIMER_ACTIVATING;
break;
case B_STATE_DEACTIVATING:
_bchannel_activate(mISDNport, i, 0, 1);
timer = B_TIMER_DEACTIVATING;
break;
default:
PERROR("Illegal event %d at state %d, please correct.\n", event, state);
}
break;
default:
PERROR("Illegal event %d, please correct.\n", event);
}
mISDNport->b_state[i] = state;
if (timer == 0)
unsched_timer(&mISDNport->b_timer[i]);
else if (timer > 0)
schedule_timer(&mISDNport->b_timer[i], timer, 0);
}
/*
* check for available channel and reserve+set it.
* give channel number or SEL_CHANNEL_ANY or SEL_CHANNEL_NO
* give exclusiv flag
* returns -(cause value) or x = channel x or 0 = no channel
* NOTE: no activation is done here
*/
int PmISDN::seize_bchannel(int channel, int exclusive)
{
int i;
/* the channel is what we have */
if (p_m_b_channel == channel)
return(channel);
/* if channel already in use, release it */