X-Git-Url: http://git.eversberg.eu/gitweb.cgi?p=lcr.git;a=blobdiff_plain;f=chan_lcr.c;h=e50847c53e4b99fdad1821896b00136841ed3c9b;hp=4abb766ebea25bd86c76bd18e809b9df01354391;hb=3ac6881c22bce18091f19b06958ac66016bf9a32;hpb=1e8009963503f713ab8b3866090b340a70f5aa77 diff --git a/chan_lcr.c b/chan_lcr.c index 4abb766..e50847c 100644 --- a/chan_lcr.c +++ b/chan_lcr.c @@ -11,23 +11,105 @@ /* -How does it work: +Registering to LCR: -To connect, open a socket and send a MESSAGE_HELLO to admin socket with +To connect, open an LCR socket and send a MESSAGE_HELLO to socket with the application name. This name is unique an can be used for routing calls. +Now the channel driver is linked to LCR and can receive and make calls. -To make a call, send a MESSAGE_NEWREF and a new reference is received. -When receiving a call, a new reference is received. -The reference is received with MESSAGE_NEWREF. -Make a MESSAGE_SETUP or receive a MESSAGE_SETUP with the reference. +Call is initiated by LCR: -To release call and reference, send or receive MESSAGE_RELEASE. -From that point on, the ref is not valid, so no other message may be sent -with that reference. +If a call is received from LCR, a MESSAGE_NEWREF is received first. +The ref_was_assigned ist set to 1. +A new chan_call instance is created. The call reference (ref) is given by +the received MESSAGE_NEWREF. The state is CHAN_LCR_STATE_IN_PREPARE. +After receiving MESSAGE_SETUP from LCR, the ast_channel instance is created +using ast_channel_alloc(1). The setup information is given to asterisk. +The new Asterisk instance pointer (ast) is stored to chan_call structure. +The state changes to CHAN_LCR_STATE_IN_SETUP. + + +Call is initiated by Asterisk: + +If a call is requested from Asterisk, a new chan_call instance is created. +The new Asterisk instance pointer (ast) is stored to chan_call structure. +The current call ref is set to 0, the state is CHAN_LCR_STATE_OUT_PREPARE. +If the call is received (lcr_call) A MESSAGE_NEWREF is sent to LCR requesting +a new call reference (ref). +The ref_was_assigned ist set to 1. +Further dialing information is queued. +After the new callref is received by special MESSAGE_NEWREF reply, new ref +is stored in the chan_call structure. +The setup information is sent to LCR using MESSAGE_SETUP. +The state changes to CHAN_LCR_STATE_OUT_SETUP. + + +Call is in process: + +During call process, messages are received and sent. +The state changes accordingly. +Any message is allowed to be sent to LCR at any time except MESSAGE_RELEASE. +If a MESSAGE_OVERLAP is received, further dialing is required. +Queued dialing information, if any, is sent to LCR using MESSAGE_DIALING. +In this case, the state changes to CHAN_LCR_STATE_OUT_DIALING. + + +Call is released by LCR: + +A MESSAGE_RELEASE is received with the call reference (ref) to be released. +The current ref is set to 0, to indicate released reference. +The ref_was_assigned==1 shows that there is no other ref to be assigned. +The state changes to CHAN_LCR_STATE_RELEASE. +ast_queue_hangup() is called, if asterisk instance (ast) exists, if not, +the chan_call instance is destroyed. +After lcr_hangup() is called-back by Asterisk, the chan_call instance +is destroyed, because the current ref is set to 0 and the state equals +CHAN_LCR_STATE_RELEASE. +If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, see the proceedure +"Call is released by Asterisk". + + +Call is released by Asterisk: + +lcr_hangup() is called-back by Asterisk. If the call reference (ref) is set, +a MESSAGE_RELEASE is sent to LCR and the chan_call instance is destroyed. +If the ref is 0 and the state is not CHAN_LCR_STATE_RELEASE, the new state is +set to CHAN_LCR_STATE_RELEASE. +The ref_was_assigned==0 shows that a ref is still requested. +Later, if the MESSAGE_NEWREF reply is received, a MESSAGE_RELEASE is sent to +LCR and the chan_call instance is destroyed. +If the ref is 0 and the state is CHAN_LCR_STATE_RELEASE, see the proceedure +"Call is released by LCR". + + +Locking issues: + +The deadlocking problem: + +- chan_lcr locks chan_lock and waits inside ast_queue_xxxx() for ast_channel +to be unlocked. +- ast_channel thread locks ast_channel and calls a tech function and waits +there for chan_lock to be unlocked. + +The solution: + +Never call ast_queue_xxxx() if ast_channel is not locked and don't wait until +ast_channel can be locked. All messages to asterisk are queued inside call +instance and will be handled using a try-lock to get ast_channel lock. +If it succeeds to lock ast_channel, the ast_queue_xxxx can safely called even +if the lock is incremented and decremented there. + +Exception: Calling ast_queue_frame inside ast->tech->read is safe, because +it is called from ast_channel process which has already locked ast_channel. */ + +/* Choose if you want to have chan_lcr for Asterisk 1.4.x or CallWeaver 1.2.x */ +#define LCR_FOR_ASTERISK +/* #define LCR_FOR_CALLWEAVER */ + #include #include #include @@ -35,54 +117,183 @@ with that reference. #include #include #include +//#include #include #include #include #include #include + +#include + +#define HAVE_ATTRIBUTE_always_inline 1 +#define HAVE_ARPA_INET_H 1 +#define HAVE_TIMERSUB 1 +#define HAVE_STRTOQ 1 +#define HAVE_INET_ATON 1 + +#include +#ifdef LCR_FOR_ASTERISK +#include +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef LCR_FOR_ASTERISK +#include +#endif +#ifdef LCR_FOR_CALLWEAVER +#include +#endif + +#include +#include +#include +#include + #include "extension.h" #include "message.h" -#include "admin.h" +#include "callerid.h" +#include "lcrsocket.h" #include "cause.h" #include "bchannel.h" +#include "options.h" #include "chan_lcr.h" -int sock; +CHAN_LCR_STATE // state description structure +MESSAGES // message text + +#ifdef LCR_FOR_CALLWEAVER +AST_MUTEX_DEFINE_STATIC(rand_lock); +#endif + +unsigned char flip_bits[256]; + +#ifdef LCR_FOR_CALLWEAVER +static struct ast_frame nullframe = { AST_FRAME_NULL, }; +#endif + +int lcr_debug=1; +int mISDN_created=1; + +char lcr_type[]="lcr"; + +#ifdef LCR_FOR_CALLWEAVER +static ast_mutex_t usecnt_lock; +static int usecnt=0; +static char *desc = "Channel driver for mISDN/LCR Support (Bri/Pri)"; +#endif + +pthread_t chan_tid; +ast_mutex_t chan_lock; /* global lock */ +ast_mutex_t log_lock; /* logging log */ +int quit; + +int glob_channel = 0; + +int lcr_sock = -1; struct admin_list { struct admin_list *next; - struct admin_msg msg; + struct admin_message msg; } *admin_first = NULL; +static struct ast_channel_tech lcr_tech; + +/* + * logging + */ +void chan_lcr_log(int type, const char *file, int line, const char *function, struct chan_call *call, struct ast_channel *ast, const char *fmt, ...) +{ + char buffer[1024]; + char call_text[128] = "NULL"; + char ast_text[128] = "NULL"; + va_list args; + + ast_mutex_lock(&log_lock); + + va_start(args,fmt); + vsnprintf(buffer,sizeof(buffer)-1,fmt,args); + buffer[sizeof(buffer)-1]=0; + va_end(args); + + if (call) + sprintf(call_text, "%d", call->ref); + if (ast) + strncpy(ast_text, ast->name, sizeof(ast_text)-1); + ast_text[sizeof(ast_text)-1] = '\0'; + + ast_log(type, file, line, function, "[call=%s ast=%s] %s", call_text, ast_text, buffer); + + ast_mutex_unlock(&log_lock); +} + /* * channel and call instances */ struct chan_call *call_first; -struct chan_call *find_call_ref(unsigned long ref) +/* + * find call by ref + * special case: 0: find new ref, that has not been assigned a ref yet + */ + +struct chan_call *find_call_ref(unsigned int ref) { struct chan_call *call = call_first; - - while(call) - { - if (call->ref == ref) + int assigned = (ref > 0); + + while(call) { + if (call->ref == ref && call->ref_was_assigned == assigned) break; call = call->next; } return(call); } -struct chan_call *find_call_handle(unsigned long handle) +void free_call(struct chan_call *call) { - struct chan_call *call = call_first; + struct chan_call **temp = &call_first; - while(call) - { - if (call->bchannel_handle == handle) - break; - call = call->next; + while(*temp) { + if (*temp == call) { + *temp = (*temp)->next; + if (call->pipe[0] > -1) + close(call->pipe[0]); + if (call->pipe[1] > -1) + close(call->pipe[1]); + if (call->bchannel) { + if (call->bchannel->call != call) + CERROR(call, NULL, "Linked bchannel structure has no link to us.\n"); + call->bchannel->call = NULL; + } + if (call->bridge_call) { + if (call->bridge_call->bridge_call != call) + CERROR(call, NULL, "Linked call structure has no link to us.\n"); + call->bridge_call->bridge_call = NULL; + } + if (call->trans) + ast_translator_free_path(call->trans); + if (call->dsp) + ast_dsp_free(call->dsp); + CDEBUG(call, NULL, "Call instance freed.\n"); + free(call); + return; + } + temp = &((*temp)->next); } - return(call); + CERROR(call, NULL, "Call instance not found in list.\n"); } struct chan_call *alloc_call(void) @@ -92,367 +303,2556 @@ struct chan_call *alloc_call(void) while(*callp) callp = &((*callp)->next); - *callp = (struct chan_call *)malloc(sizeof(struct chan_call)); + *callp = (struct chan_call *)calloc(1, sizeof(struct chan_call)); + if (*callp) + memset(*callp, 0, sizeof(struct chan_call)); + if (pipe((*callp)->pipe) < 0) { + CERROR(*callp, NULL, "Failed to create pipe.\n"); + free_call(*callp); + return(NULL); + } + fcntl((*callp)->pipe[0], F_SETFL, O_NONBLOCK); + CDEBUG(*callp, NULL, "Call instance allocated.\n"); return(*callp); } -void free_call(struct chan_call *call) +unsigned short new_bridge_id(void) { - struct chan_call **temp = &call_first; + struct chan_call *call; + unsigned short id = 1; - while(*temp) - { - if (*temp == call) - { - *temp = (*temp)->next; - free(call); - return; + /* search for lowest bridge id that is not in use and not 0 */ + while(id) { + call = call_first; + while(call) { + if (call->bridge_id == id) + break; + call = call->next; } - temp = &((*temp)->next); + if (!call) + break; + id++; } -} - - -/* - * receive bchannel data - */ -void rx_data(struct bchannel *bchannel, unsigned char *data, int len) -{ -} - -void rx_dtmf(struct bchannel *bchannel, char tone) -{ + CDEBUG(NULL, NULL, "New bridge ID %d.\n", id); + return(id); } /* * enque message to LCR */ -int send_message(int message_type, unsigned long ref, union parameter *param) +int send_message(int message_type, unsigned int ref, union parameter *param) { struct admin_list *admin, **adminp; + if (lcr_sock < 0) { + CDEBUG(NULL, NULL, "Ignoring message %d, because socket is closed.\n", message_type); + return -1; + } + CDEBUG(NULL, NULL, "Sending %s to socket.\n", messages_txt[message_type]); + adminp = &admin_first; while(*adminp) adminp = &((*adminp)->next); - admin = (struct admin_list *)malloc(sizeof(struct admin_list)); + admin = (struct admin_list *)calloc(1, sizeof(struct admin_list)); + if (!admin) { + CERROR(NULL, NULL, "No memory for message to LCR.\n"); + return -1; + } *adminp = admin; - admin->msg.type = message_type; - admin->msg.ref = ref; - memcpy(&admin->msg.param, param, sizeof(union parameter)); + admin->msg.message = ADMIN_MESSAGE; + admin->msg.u.msg.type = message_type; + admin->msg.u.msg.ref = ref; + memcpy(&admin->msg.u.msg.param, param, sizeof(union parameter)); return(0); } /* - * message received from LCR + * apply options (in locked state) */ -int receive_message(int message_type, unsigned long ref, union parameter *param) +void apply_opt(struct chan_call *call, char *data) { union parameter newparam; - struct bchannel *bchannel; - struct chan_call *call; + char string[1024], *p = string, *opt, *key; + int gain, i; - memset(&newparam, 0, sizeof(union parameter)); + if (!data[0]) + return; // no opts - /* handle bchannel message*/ - if (message_type == MESSAGE_BCHANNEL) - { - switch(param->bchannel.type) - { - case BCHANNEL_ASSIGN: - if ((bchannel = find_bchannel_handle(param->bchannel.handle))) - { - fprintf(stderr, "error: bchannel handle %x already assigned.\n", param->bchannel.handle); - return(-1); + strncpy(string, data, sizeof(string)-1); + string[sizeof(string)-1] = '\0'; + + /* parse options */ + while((opt = strsep(&p, ":"))) { + switch(opt[0]) { + case 'd': + if (opt[1] == '\0') { + CERROR(call, call->ast, "Option 'd' (display) expects parameter.\n", opt); + break; } - /* create bchannel */ - bchannel = alloc_bchannel(param->bchannel.handle); - if (!bchannel) - { - fprintf(stderr, "error: alloc bchannel handle %x failed.\n", param->bchannel.handle); - return(-1); + CDEBUG(call, call->ast, "Option 'd' (display) with text '%s'.\n", opt+1); + if (call->state == CHAN_LCR_STATE_OUT_PREPARE) + strncpy(call->display, opt+1, sizeof(call->display)-1); + else { + memset(&newparam, 0, sizeof(union parameter)); + strncpy(newparam.notifyinfo.display, opt+1, sizeof(newparam.notifyinfo.display)-1); + send_message(MESSAGE_NOTIFY, call->ref, &newparam); } - - /* configure channel */ - bchannel->b_tx_gain = param->bchannel.tx_gain; - bchannel->b_rx_gain = param->bchannel.rx_gain; - strncpy(bchannel->b_pipeline, param->bchannel.pipeline, sizeof(bchannel->b_pipeline)-1); - if (param->bchannel.crypt_len) - { - bchannel->b_crypt_len = param->bchannel.crypt_len; - bchannel->b_crypt_type = param->bchannel.crypt_type; - memcpy(bchannel->b_crypt_key, param->bchannel.crypt, param->bchannel.crypt_len); + break; + case 'n': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 'n' (no DTMF) expects no parameter.\n", opt); + break; } - bchannel->b_txdata = 0; - bchannel->b_dtmf = 1; - bchannel->b_tx_dejitter = 1; - - /* in case, ref is not set, this bchannel instance must - * be created until it is removed again by LCR */ - /* link to call */ - if ((call = find_call_ref(ref))) - { - bchannel->ref = ref; - call->bchannel_handle = param->bchannel.handle; + CDEBUG(call, call->ast, "Option 'n' (no DTMF).\n"); + if (call->dsp_dtmf) { + call->dsp_dtmf = 0; + if (call->bchannel) + bchannel_dtmf(call->bchannel, 0); } - if (bchannel_create(bchannel)) - bchannel_activate(bchannel, 1); - - /* acknowledge */ - newparam.bchannel.type = BCHANNEL_ASSIGN_ACK; - newparam.bchannel.handle = param->bchannel.handle; - send_message(MESSAGE_BCHANNEL, 0, &newparam); break; - - case BCHANNEL_REMOVE: - if (!(bchannel = find_bchannel_handle(param->bchannel.handle))) - { - fprintf(stderr, "error: bchannel handle %x not assigned.\n", param->bchannel.handle); - return(-1); + case 'c': + if (opt[1] == '\0') { + CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter.\n", opt); + break; } - /* unlink from call */ - if ((call = find_call_ref(bchannel->ref))) - { - call->bchannel_handle = 0; + key = opt+1; + /* check for 0xXXXX... type of key */ + if (!!strncmp((char *)key, "0x", 2)) { + CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter starting with '0x'.\n", opt); + break; } - /* destroy and remove bchannel */ - free_bchannel(bchannel); - - /* acknowledge */ - newparam.bchannel.type = BCHANNEL_REMOVE_ACK; - newparam.bchannel.handle = param->bchannel.handle; - send_message(MESSAGE_BCHANNEL, 0, &newparam); - + key+=2; + if (strlen(key) > 56*2 || (strlen(key) % 1)) { + CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with max 56 bytes ('0x' + 112 characters)\n", opt); + break; + } + i = 0; + while(*key) { + if (*key>='0' && *key<='9') + call->bf_key[i] = (*key-'0') << 8; + else if (*key>='a' && *key<='f') + call->bf_key[i] = (*key-'a'+10) << 8; + else if (*key>='A' && *key<='F') + call->bf_key[i] = (*key-'A'+10) << 8; + else + break; + key++; + if (*key>='0' && *key<='9') + call->bf_key[i] += (*key - '0'); + else if (*key>='a' && *key<='f') + call->bf_key[i] += (*key - 'a' + 10); + else if (*key>='A' && *key<='F') + call->bf_key[i] += (*key - 'A' + 10); + else + break; + key++; + i++; + } + if (*key) { + CERROR(call, call->ast, "Option 'c' (encrypt) expects key parameter with hex values 0-9,a-f.\n"); + break; + } + call->bf_len = i; + CDEBUG(call, call->ast, "Option 'c' (encrypt) blowfish key '%s' (len=%d).\n", opt+1, i); + if (call->bchannel) + bchannel_blowfish(call->bchannel, call->bf_key, call->bf_len); break; + case 'h': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 'h' (HDLC) expects no parameter.\n", opt); + break; + } + CDEBUG(call, call->ast, "Option 'h' (HDLC).\n"); + if (!call->hdlc) + call->hdlc = 1; + break; + case 't': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 't' (no_dsp) expects no parameter.\n", opt); + break; + } + CDEBUG(call, call->ast, "Option 't' (no dsp).\n"); + if (!call->nodsp) + call->nodsp = 1; + break; + case 'e': + if (opt[1] == '\0') { + CERROR(call, call->ast, "Option 'e' (echo cancel) expects parameter.\n", opt); + break; + } + CDEBUG(call, call->ast, "Option 'e' (echo cancel) with config '%s'.\n", opt+1); + strncpy(call->pipeline, opt+1, sizeof(call->pipeline)-1); + if (call->bchannel) + bchannel_pipeline(call->bchannel, call->pipeline); + break; + case 'f': + if (opt[1] == '\0') { + CERROR(call, call->ast, "Option 'f' (faxdetect) expects parameter.\n", opt); + break; + } + call->faxdetect=atoi(opt+1); + if (!call->dsp) + call->dsp=ast_dsp_new(); + if (call->dsp) { + #ifdef LCR_FOR_CALLWEAVER + ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT| DSP_FEATURE_FAX_CNG_DETECT); + #endif + #ifdef LCR_FOR_ASTERISK + #ifdef DSP_FEATURE_DTMF_DETECT + ast_dsp_set_features(call->dsp, DSP_FEATURE_DTMF_DETECT| DSP_FEATURE_FAX_DETECT); + #else + ast_dsp_set_features(call->dsp, DSP_FEATURE_DIGIT_DETECT| DSP_FEATURE_FAX_DETECT); + #endif - default: - fprintf(stderr, "received unknown bchannel message %d\n", param->bchannel.type); - } - return(0); - } - - /* handle new ref */ - if (message_type == MESSAGE_NEWREF) - { - if (param->direction) - { - /* new ref from lcr */ - if (!ref || find_call_ref(ref)) - { - fprintf(stderr, "illegal new ref %d received\n", ref); - return(-1); + #endif + if (!call->trans) + #ifdef LCR_FOR_CALLWEAVER + call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, 8000, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW, 8000); + #endif + #ifdef LCR_FOR_ASTERISK + call->trans=ast_translator_build_path(AST_FORMAT_SLINEAR, (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW); + #endif } - call = alloc_call(); - call->ref = ref; - } else - { - /* new ref, as requested from this remote application */ - call = find_call_ref(0); - if (!call) - { - /* send release, if ref does not exist */ - newparam.disconnectinfo.cause = CAUSE_NORMAL; - newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL; - send_message(MESSAGE_RELEASE, ref, &newparam); - return(0); + CDEBUG(call, call->ast, "Option 'f' (faxdetect) with config '%s'.\n", call->faxdetect); + break; + case 'r': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 'r' (re-buffer 160 bytes) expects no parameter.\n", opt); + break; } - call->ref = ref; -#warning process call (send setup, if pending) + CDEBUG(call, call->ast, "Option 'r' (re-buffer 160 bytes)"); + call->rebuffer = 1; + call->framepos = 0; + break; + case 's': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 's' (inband DTMF) expects no parameter.\n", opt); + break; + } + CDEBUG(call, call->ast, "Option 's' (inband DTMF).\n"); + call->inband_dtmf = 1; + break; + case 'v': + if (opt[1] != 'r' && opt[1] != 't') { + CERROR(call, call->ast, "Option 'v' (volume) expects parameter.\n", opt); + break; + } + gain = atoi(opt+2); + if (gain < -8 || gain >8) { + CERROR(call, call->ast, "Option 'v' (volume) expects parameter in range of -8 through 8.\n"); + break; + } + CDEBUG(call, call->ast, "Option 'v' (volume) with gain 2^%d.\n", gain); + if (opt[1] == 'r') { + call->rx_gain = gain; + if (call->bchannel) + bchannel_gain(call->bchannel, call->rx_gain, 0); + } else { + call->tx_gain = gain; + if (call->bchannel) + bchannel_gain(call->bchannel, call->tx_gain, 1); + } + break; + case 'k': + if (opt[1] != '\0') { + CERROR(call, call->ast, "Option 'k' (keypad) expects no parameter.\n", opt); + break; + } + CDEBUG(call, call->ast, "Option 'k' (keypad).\n"); + if (!call->keypad) + call->keypad = 1; + break; + default: + CERROR(call, call->ast, "Option '%s' unknown.\n", opt); } - return(0); + } + + /* re-open, if bchannel is created */ + if (call->bchannel && call->bchannel->b_sock > -1) { + bchannel_destroy(call->bchannel); + if (bchannel_create(call->bchannel, ((call->nodsp || call->faxdetect > 0)?1:0) + ((call->hdlc)?2:0))) + bchannel_activate(call->bchannel, 1); } +} - /* check ref */ - if (!ref) - { - fprintf(stderr, "received message %d without ref\n", message_type); - return(-1); - } - call = find_call_ref(ref); - if (!call) - { - /* ignore ref that is not used (anymore) */ - return(0); - } +/* + * send setup info to LCR + * this function is called, when asterisk call is received and ref is received + */ +static void send_setup_to_lcr(struct chan_call *call) +{ + union parameter newparam; + struct ast_channel *ast = call->ast; - /* handle messages */ - switch(message_type) - { -#warning we must see if ref is a reply or a request, do we?? - case MESSAGE_RELEASE: -#warning release call - free_call(call); - return(0); + if (!call->ast || !call->ref) + return; - case MESSAGE_SETUP: -#warning handle incoming setup, send to asterisk + CDEBUG(call, call->ast, "Sending setup to LCR. (interface=%s dialstring=%s, cid=%s)\n", call->interface, call->dialstring, call->cid_num); + + /* send setup message to LCR */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.setup.dialinginfo.itype = INFO_ITYPE_ISDN; + newparam.setup.dialinginfo.ntype = INFO_NTYPE_UNKNOWN; + if (call->keypad) + strncpy(newparam.setup.dialinginfo.keypad, call->dialstring, sizeof(newparam.setup.dialinginfo.keypad)-1); + else + strncpy(newparam.setup.dialinginfo.id, call->dialstring, sizeof(newparam.setup.dialinginfo.id)-1); + strncpy(newparam.setup.dialinginfo.interfaces, call->interface, sizeof(newparam.setup.dialinginfo.interfaces)-1); + newparam.setup.callerinfo.itype = INFO_ITYPE_CHAN; + newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN; + strncpy(newparam.setup.callerinfo.display, call->display, sizeof(newparam.setup.callerinfo.display)-1); + call->display[0] = '\0'; + if (call->cid_num[0]) + strncpy(newparam.setup.callerinfo.id, call->cid_num, sizeof(newparam.setup.callerinfo.id)-1); + if (call->cid_name[0]) + strncpy(newparam.setup.callerinfo.name, call->cid_name, sizeof(newparam.setup.callerinfo.name)-1); + if (call->cid_rdnis[0]) { + strncpy(newparam.setup.redirinfo.id, call->cid_rdnis, sizeof(newparam.setup.redirinfo.id)-1); + newparam.setup.redirinfo.itype = INFO_ITYPE_CHAN; + newparam.setup.redirinfo.ntype = INFO_NTYPE_UNKNOWN; + } + switch(ast->cid.cid_pres & AST_PRES_RESTRICTION) { + case AST_PRES_RESTRICTED: + newparam.setup.callerinfo.present = INFO_PRESENT_RESTRICTED; break; + case AST_PRES_UNAVAILABLE: + newparam.setup.callerinfo.present = INFO_PRESENT_NOTAVAIL; + break; + case AST_PRES_ALLOWED: + default: + newparam.setup.callerinfo.present = INFO_PRESENT_ALLOWED; } - return(0); + switch(ast->cid.cid_ton) { + case 4: + newparam.setup.callerinfo.ntype = INFO_NTYPE_SUBSCRIBER; + break; + case 2: + newparam.setup.callerinfo.ntype = INFO_NTYPE_NATIONAL; + break; + case 1: + newparam.setup.callerinfo.ntype = INFO_NTYPE_INTERNATIONAL; + break; + default: + newparam.setup.callerinfo.ntype = INFO_NTYPE_UNKNOWN; + } + newparam.setup.capainfo.bearer_capa = ast->transfercapability; + newparam.setup.capainfo.bearer_mode = INFO_BMODE_CIRCUIT; + if (call->hdlc) + newparam.setup.capainfo.source_mode = B_MODE_HDLC; + else { + newparam.setup.capainfo.source_mode = B_MODE_TRANSPARENT; + newparam.setup.capainfo.bearer_info1 = (options.law=='a')?3:2; + } + newparam.setup.capainfo.hlc = INFO_HLC_NONE; + newparam.setup.capainfo.exthlc = INFO_HLC_NONE; + send_message(MESSAGE_SETUP, call->ref, &newparam); + + /* change to outgoing setup state */ + call->state = CHAN_LCR_STATE_OUT_SETUP; +} + +/* + * send dialing info to LCR + * this function is called, when setup acknowledge is received and dialing + * info is available. + */ +static void send_dialque_to_lcr(struct chan_call *call) +{ + union parameter newparam; + + if (!call->ast || !call->ref || !call->dialque[0]) + return; + + CDEBUG(call, call->ast, "Sending dial queue to LCR. (dialing=%s)\n", call->dialque); + + /* send setup message to LCR */ + memset(&newparam, 0, sizeof(union parameter)); + if (call->keypad) + strncpy(newparam.information.keypad, call->dialque, sizeof(newparam.information.keypad)-1); + else + strncpy(newparam.information.id, call->dialque, sizeof(newparam.information.id)-1); + call->dialque[0] = '\0'; + send_message(MESSAGE_INFORMATION, call->ref, &newparam); } +/* + * in case of a bridge, the unsupported message can be forwarded directly + * to the remote call. + */ +static void bridge_message_if_bridged(struct chan_call *call, int message_type, union parameter *param) +{ + /* check bridge */ + if (!call) return; + if (!call->bridge_call) return; + CDEBUG(call, NULL, "Sending message due bridging.\n"); + send_message(message_type, call->bridge_call->ref, param); +} -/* asterisk handler - * warning! not thread safe - * returns -1 for socket error, 0 for no work, 1 for work +/* + * send release message to LCR and import bchannel if exported */ -int handle_socket(void) +static void send_release_and_import(struct chan_call *call, int cause, int location) { - int work = 0; - int len; - struct admin_message msg; - struct admin_list *admin; + union parameter newparam; - /* read from socket */ - len = read(sock, &msg, sizeof(msg)); - if (len == 0) - { - printf("Socket closed\n"); - return(-1); // socket closed + /* importing channel */ + if (call->bchannel) { + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_RELEASE; + newparam.bchannel.handle = call->bchannel->handle; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); } - if (len > 0) - { - if (len != sizeof(msg)) - { - fprintf(stderr, "Socket short read (%d)\n", len); - return(-1); // socket error - } - if (msg.message != ADMIN_MESSAGE) - { - fprintf(stderr, "Socket received illegal message %d\n", msg.message); - return(-1); // socket error + /* sending release */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.disconnectinfo.cause = cause; + newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL; + send_message(MESSAGE_RELEASE, call->ref, &newparam); +} + +/* + * check if extension matches and start asterisk + * if it can match, proceed + * if not, release + */ +static void lcr_start_pbx(struct chan_call *call, struct ast_channel *ast, int complete) +{ + int cause, ret; + union parameter newparam; + char *exten = ast->exten; + if (!*exten) + exten = "s"; + + CDEBUG(call, ast, "Try to start pbx. (exten=%s context=%s complete=%s)\n", exten, ast->context, complete?"yes":"no"); + + if (complete) { + /* if not match */ + if (!ast_canmatch_extension(ast, ast->context, exten, 1, call->oad)) { + CDEBUG(call, ast, "Got 'sending complete', but extension '%s' will not match at context '%s' - releasing.\n", exten, ast->context); + cause = 1; + goto release; } - receive_message(msg.u.msg.type, msg.u.msg.ref, &msg.u.msg.param); - printf("message received %d\n", msg.u.msg.type); - work = 1; - } else - { - if (errno != EWOULDBLOCK) - { - fprintf(stderr, "Socket error %d\n", errno); - return(-1); + if (!ast_exists_extension(ast, ast->context, exten, 1, call->oad)) { + CDEBUG(call, ast, "Got 'sending complete', but extension '%s' would match at context '%s', if more digits would be dialed - releasing.\n", exten, ast->context); + cause = 28; + goto release; } - } + CDEBUG(call, ast, "Got 'sending complete', extensions matches.\n"); + /* send setup acknowledge to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + send_message(MESSAGE_PROCEEDING, call->ref, &newparam); - /* write to socket */ - if (!admin_first) - return(work); - admin = admin_first; - len = write(sock, &admin->msg, sizeof(msg)); - if (len == 0) - { - printf("Socket closed\n"); - return(-1); // socket closed + /* change state */ + call->state = CHAN_LCR_STATE_IN_PROCEEDING; + + goto start; } - if (len > 0) - { - if (len != sizeof(msg)) - { - fprintf(stderr, "Socket short write (%d)\n", len); - return(-1); // socket error + + if (ast_canmatch_extension(ast, ast->context, exten, 1, call->oad)) { + /* send setup acknowledge to lcr */ + if (call->state != CHAN_LCR_STATE_IN_DIALING) { + memset(&newparam, 0, sizeof(union parameter)); + send_message(MESSAGE_OVERLAP, call->ref, &newparam); } - /* free head */ - admin_first = admin->next; - free(admin); - work = 1; - } else - { - if (errno != EWOULDBLOCK) - { - fprintf(stderr, "Socket error %d\n", errno); - return(-1); + /* change state */ + call->state = CHAN_LCR_STATE_IN_DIALING; + + /* if match, start pbx */ + if (ast_exists_extension(ast, ast->context, exten, 1, call->oad)) { + CDEBUG(call, ast, "Extensions matches.\n"); + goto start; } + + /* if can match */ + CDEBUG(call, ast, "Extensions may match, if more digits are dialed.\n"); + return; } - return(work); + if (!*ast->exten) { + /* if can match */ + CDEBUG(call, ast, "There is no 's' extension (and we tried to match it implicitly). Extensions may match, if more digits are dialed.\n"); + return; + } + + /* if not match */ + cause = 1; + release: + /* release lcr */ + CDEBUG(call, ast, "Releasing due to extension missmatch.\n"); + send_release_and_import(call, cause, LOCATION_PRIVATE_LOCAL); + call->ref = 0; + /* release asterisk */ + ast->hangupcause = call->cause; + /* change to release state */ + call->state = CHAN_LCR_STATE_RELEASE; + ast_hangup(ast); // call will be destroyed here + return; + + start: + /* send setup to asterisk */ + CDEBUG(call, ast, "Starting call to Asterisk due to matching extension.\n"); + + #ifdef LCR_FOR_CALLWEAVER + ast->type = "LCR"; + snprintf(ast->name, sizeof(ast->name), "LCR/%s-%04x",ast->cid.cid_num, ast_random() & 0xffff); + #endif + + ret = ast_pbx_start(ast); + if (ret < 0) { + cause = (ret==-2)?34:27; + goto release; + } + call->pbx_started = 1; + ast_setstate(ast, AST_STATE_RING); } /* - * main function + * incoming setup from LCR */ -int main(int argc, char *argv[]) +static void lcr_in_setup(struct chan_call *call, int message_type, union parameter *param) { - char *socket_name = SOCKET_NAME; + struct ast_channel *ast; + + CDEBUG(call, NULL, "Incomming setup from LCR. (callerid %s, dialing %s)\n", param->setup.callerinfo.id, param->setup.dialinginfo.id); + + /* create asterisk channel instrance */ + + #ifdef LCR_FOR_CALLWEAVER + ast = ast_channel_alloc(1); + #endif + + #ifdef LCR_FOR_ASTERISK + ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel); + #endif + + if (!ast) { + /* release */ + CERROR(call, NULL, "Failed to create Asterisk channel - releasing.\n"); + send_release_and_import(call, CAUSE_RESSOURCEUNAVAIL, LOCATION_PRIVATE_LOCAL); + /* remove call */ + free_call(call); + return; + } + /* link together */ + call->ast = ast; + ast->tech_pvt = call; + ast->tech = &lcr_tech; + ast->fds[0] = call->pipe[0]; + + /* fill setup information */ + if (param->setup.dialinginfo.id) + strncpy(ast->exten, param->setup.dialinginfo.id, AST_MAX_EXTENSION-1); + if (param->setup.context[0]) + strncpy(ast->context, param->setup.context, AST_MAX_CONTEXT-1); + else + strncpy(ast->context, param->setup.callerinfo.interface, AST_MAX_CONTEXT-1); + if (param->setup.callerinfo.id[0]) + ast->cid.cid_num = strdup(param->setup.callerinfo.id); + if (param->setup.callerinfo.name[0]) + ast->cid.cid_name = strdup(param->setup.callerinfo.name); + if (param->setup.redirinfo.id[0]) + ast->cid.cid_name = strdup(numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international)); + switch (param->setup.callerinfo.present) { + case INFO_PRESENT_ALLOWED: + ast->cid.cid_pres = AST_PRES_ALLOWED; + break; + case INFO_PRESENT_RESTRICTED: + ast->cid.cid_pres = AST_PRES_RESTRICTED; + break; + default: + ast->cid.cid_pres = AST_PRES_UNAVAILABLE; + } + switch (param->setup.callerinfo.ntype) { + case INFO_NTYPE_SUBSCRIBER: + ast->cid.cid_ton = 4; + break; + case INFO_NTYPE_NATIONAL: + ast->cid.cid_ton = 2; + break; + case INFO_NTYPE_INTERNATIONAL: + ast->cid.cid_ton = 1; + break; + default: + ast->cid.cid_ton = 0; + } + ast->transfercapability = param->setup.capainfo.bearer_capa; + /* enable hdlc if transcap is data */ + if (param->setup.capainfo.source_mode == B_MODE_HDLC) + call->hdlc = 1; + strncpy(call->oad, numberrize_callerinfo(param->setup.callerinfo.id, param->setup.callerinfo.ntype, options.national, options.international), sizeof(call->oad)-1); + + /* configure channel */ + ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW; + ast->readformat = ast->rawreadformat = ast->nativeformats; + ast->writeformat = ast->rawwriteformat = ast->nativeformats; + ast->priority = 1; + ast->hangupcause = 0; + + /* change state */ + call->state = CHAN_LCR_STATE_IN_SETUP; + + if (!call->pbx_started) + lcr_start_pbx(call, ast, param->setup.dialinginfo.sending_complete); +} + +/* + * incoming setup acknowledge from LCR + */ +static void lcr_in_overlap(struct chan_call *call, int message_type, union parameter *param) +{ + if (!call->ast) return; + + CDEBUG(call, call->ast, "Incomming setup acknowledge from LCR.\n"); + + /* send pending digits in dialque */ + if (call->dialque[0]) + send_dialque_to_lcr(call); + /* change to overlap state */ + call->state = CHAN_LCR_STATE_OUT_DIALING; +} + +/* + * incoming proceeding from LCR + */ +static void lcr_in_proceeding(struct chan_call *call, int message_type, union parameter *param) +{ + CDEBUG(call, call->ast, "Incomming proceeding from LCR.\n"); + + /* change state */ + call->state = CHAN_LCR_STATE_OUT_PROCEEDING; + /* queue event for asterisk */ + if (call->ast && call->pbx_started) + strncat(call->queue_string, "P", sizeof(call->queue_string)-1); +} + +/* + * incoming alerting from LCR + */ +static void lcr_in_alerting(struct chan_call *call, int message_type, union parameter *param) +{ + CDEBUG(call, call->ast, "Incomming alerting from LCR.\n"); + + /* change state */ + call->state = CHAN_LCR_STATE_OUT_ALERTING; + /* queue event to asterisk */ + if (call->ast && call->pbx_started) + strncat(call->queue_string, "R", sizeof(call->queue_string)-1); +} + +/* + * incoming connect from LCR + */ +static void lcr_in_connect(struct chan_call *call, int message_type, union parameter *param) +{ + union parameter newparam; + + CDEBUG(call, call->ast, "Incomming connect (answer) from LCR.\n"); + + /* change state */ + call->state = CHAN_LCR_STATE_CONNECT; + /* request bchannel */ + if (!call->bchannel) { + CDEBUG(call, call->ast, "Requesting B-channel.\n"); + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_REQUEST; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); + } + /* copy connectinfo */ + memcpy(&call->connectinfo, ¶m->connectinfo, sizeof(struct connect_info)); + /* queue event to asterisk */ + if (call->ast && call->pbx_started) + strncat(call->queue_string, "N", sizeof(call->queue_string)-1); +} + +/* + * incoming disconnect from LCR + */ +static void lcr_in_disconnect(struct chan_call *call, int message_type, union parameter *param) +{ + struct ast_channel *ast = call->ast; + + CDEBUG(call, call->ast, "Incomming disconnect from LCR. (cause=%d)\n", param->disconnectinfo.cause); + + /* change state */ + call->state = CHAN_LCR_STATE_IN_DISCONNECT; + /* save cause */ + call->cause = param->disconnectinfo.cause; + call->location = param->disconnectinfo.location; + /* if bridge, forward disconnect and return */ +#ifdef TODO + feature flag + if (call->bridge_call) { + CDEBUG(call, call->ast, "Only signal disconnect via bridge.\n"); + bridge_message_if_bridged(call, message_type, param); + return; + } +#endif + /* release lcr with same cause */ + send_release_and_import(call, call->cause, call->location); + call->ref = 0; + /* change to release state */ + call->state = CHAN_LCR_STATE_RELEASE; + /* queue release asterisk */ + if (ast) { + ast->hangupcause = call->cause; + if (call->pbx_started) + strcpy(call->queue_string, "H"); // overwrite other indications + else { + ast_hangup(ast); // call will be destroyed here + } + } +} + +/* + * incoming release from LCR + */ +static void lcr_in_release(struct chan_call *call, int message_type, union parameter *param) +{ + struct ast_channel *ast = call->ast; + + CDEBUG(call, call->ast, "Incomming release from LCR, releasing ref. (cause=%d)\n", param->disconnectinfo.cause); + + /* release ref */ + call->ref = 0; + /* change to release state */ + call->state = CHAN_LCR_STATE_RELEASE; + /* copy release info */ + if (!call->cause) { + call->cause = param->disconnectinfo.cause; + call->location = param->disconnectinfo.location; + } + /* if we have an asterisk instance, queue hangup, else we are done */ + if (ast) { + ast->hangupcause = call->cause; + if (call->pbx_started) + strcpy(call->queue_string, "H"); + else { + ast_hangup(ast); // call will be destroyed here + } + } else { + free_call(call); + } + +} + +/* + * incoming information from LCR + */ +static void lcr_in_information(struct chan_call *call, int message_type, union parameter *param) +{ + struct ast_channel *ast = call->ast; + + CDEBUG(call, call->ast, "Incoming information from LCR. (dialing=%s)\n", param->information.id); + + if (!ast) return; + + /* pbx not started */ + if (!call->pbx_started) { + CDEBUG(call, call->ast, "Asterisk not started, adding digits to number.\n"); + strncat(ast->exten, param->information.id, AST_MAX_EXTENSION-1); + lcr_start_pbx(call, ast, param->information.sending_complete); + return; + } + + /* change dailing state after setup */ + if (call->state == CHAN_LCR_STATE_IN_SETUP) { + CDEBUG(call, call->ast, "Changing from SETUP to DIALING state.\n"); + call->state = CHAN_LCR_STATE_IN_DIALING; +// ast_setstate(ast, AST_STATE_DIALING); + } + + /* queue digits */ + if (call->state == CHAN_LCR_STATE_IN_DIALING && param->information.id[0]) + strncat(call->queue_string, param->information.id, sizeof(call->queue_string)-1); + + /* use bridge to forware message not supported by asterisk */ + if (call->state == CHAN_LCR_STATE_CONNECT) { + CDEBUG(call, call->ast, "Call is connected, bridging.\n"); + bridge_message_if_bridged(call, message_type, param); + } +} + +/* + * incoming information from LCR + */ +static void lcr_in_notify(struct chan_call *call, int message_type, union parameter *param) +{ + union parameter newparam; + + CDEBUG(call, call->ast, "Incomming notify from LCR. (notify=%d)\n", param->notifyinfo.notify); + + /* request bchannel, if call is resumed and we don't have it */ + if (param->notifyinfo.notify == INFO_NOTIFY_USER_RESUMED && !call->bchannel && call->ref) { + CDEBUG(call, call->ast, "Reqesting bchannel at resume.\n"); + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_REQUEST; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); + } + + if (!call->ast) return; + + /* use bridge to forware message not supported by asterisk */ + bridge_message_if_bridged(call, message_type, param); +} + +/* + * incoming information from LCR + */ +static void lcr_in_facility(struct chan_call *call, int message_type, union parameter *param) +{ + CDEBUG(call, call->ast, "Incomming facility from LCR.\n"); + + if (!call->ast) return; + + /* use bridge to forware message not supported by asterisk */ + bridge_message_if_bridged(call, message_type, param); +} + +/* + * incoming pattern from LCR + */ +static void lcr_in_pattern(struct chan_call *call, int message_type, union parameter *param) +{ + union parameter newparam; + + CDEBUG(call, call->ast, "Incomming pattern indication from LCR.\n"); + + if (!call->ast) return; + + /* pattern are indicated only once */ + if (call->has_pattern) + return; + call->has_pattern = 1; + + /* request bchannel */ + if (!call->bchannel) { + CDEBUG(call, call->ast, "Requesting B-channel.\n"); + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_REQUEST; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); + } + /* queue PROGRESS, because tones are available */ + if (call->ast && call->pbx_started) + strncat(call->queue_string, "T", sizeof(call->queue_string)-1); +} + +/* + * got dtmf from bchannel (locked state) + */ +void lcr_in_dtmf(struct chan_call *call, int val) +{ + struct ast_channel *ast = call->ast; + char digit[2]; + + if (!ast) + return; + if (!call->pbx_started) + return; + + if (!call->dsp_dtmf) { + CDEBUG(call, call->ast, "Recognised DTMF digit '%c', but ignoring. This is fixed in later mISDN driver.\n", val); + return; + } + + CDEBUG(call, call->ast, "Recognised DTMF digit '%c'.\n", val); + digit[0] = val; + digit[1] = '\0'; + strncat(call->queue_string, digit, sizeof(call->queue_string)-1); +} + +/* + * message received from LCR + */ +int receive_message(int message_type, unsigned int ref, union parameter *param) +{ + struct bchannel *bchannel; + struct chan_call *call; + union parameter newparam; + + memset(&newparam, 0, sizeof(union parameter)); + + /* handle bchannel message*/ + if (message_type == MESSAGE_BCHANNEL) { + switch(param->bchannel.type) { + case BCHANNEL_ASSIGN: + CDEBUG(NULL, NULL, "Received BCHANNEL_ASSIGN message. (handle=%08lx) for ref %d\n", param->bchannel.handle, ref); + if ((bchannel = find_bchannel_handle(param->bchannel.handle))) { + CERROR(NULL, NULL, "bchannel handle %x already assigned.\n", (int)param->bchannel.handle); + return(-1); + } + /* create bchannel */ + bchannel = alloc_bchannel(param->bchannel.handle); + if (!bchannel) { + CERROR(NULL, NULL, "alloc bchannel handle %x failed.\n", (int)param->bchannel.handle); + return(-1); + } + + /* configure channel */ + bchannel->b_tx_gain = param->bchannel.tx_gain; + bchannel->b_rx_gain = param->bchannel.rx_gain; + strncpy(bchannel->b_pipeline, param->bchannel.pipeline, sizeof(bchannel->b_pipeline)-1); + if (param->bchannel.crypt_len && param->bchannel.crypt_len <= sizeof(bchannel->b_bf_key)) { + bchannel->b_bf_len = param->bchannel.crypt_len; + memcpy(bchannel->b_bf_key, param->bchannel.crypt, param->bchannel.crypt_len); + } + bchannel->b_txdata = 0; + bchannel->b_tx_dejitter = 1; + + /* in case, ref is not set, this bchannel instance must + * be created until it is removed again by LCR */ + /* link to call */ + call = find_call_ref(ref); + if (call) { + bchannel->call = call; + call->bchannel = bchannel; + if (call->dsp_dtmf) + bchannel_dtmf(bchannel, 1); + if (call->bf_len) + bchannel_blowfish(bchannel, call->bf_key, call->bf_len); + if (call->pipeline[0]) + bchannel_pipeline(bchannel, call->pipeline); + if (call->rx_gain) + bchannel_gain(bchannel, call->rx_gain, 0); + if (call->tx_gain) + bchannel_gain(bchannel, call->tx_gain, 1); + if (call->bridge_id) { + CDEBUG(call, call->ast, "Join bchannel, because call is already bridged.\n"); + bchannel_join(bchannel, call->bridge_id); + } + /* create only, if call exists, othewhise it bchannel is freed below... */ + if (bchannel_create(bchannel, ((call->nodsp || call->faxdetect > 0)?1:0) + ((call->hdlc)?2:0))) + bchannel_activate(bchannel, 1); + } + /* acknowledge */ + newparam.bchannel.type = BCHANNEL_ASSIGN_ACK; + newparam.bchannel.handle = param->bchannel.handle; + send_message(MESSAGE_BCHANNEL, 0, &newparam); + /* if call has released before bchannel is assigned */ + if (!call) { + newparam.bchannel.type = BCHANNEL_RELEASE; + newparam.bchannel.handle = param->bchannel.handle; + send_message(MESSAGE_BCHANNEL, 0, &newparam); + } + + break; + + case BCHANNEL_REMOVE: + CDEBUG(NULL, NULL, "Received BCHANNEL_REMOVE message. (handle=%08lx)\n", param->bchannel.handle); + if (!(bchannel = find_bchannel_handle(param->bchannel.handle))) { + CERROR(NULL, NULL, "Bchannel handle %x not assigned.\n", (int)param->bchannel.handle); + return(-1); + } + /* unklink from call and destroy bchannel */ + free_bchannel(bchannel); + + /* acknowledge */ + newparam.bchannel.type = BCHANNEL_REMOVE_ACK; + newparam.bchannel.handle = param->bchannel.handle; + send_message(MESSAGE_BCHANNEL, 0, &newparam); + + break; + + default: + CDEBUG(NULL, NULL, "Received unknown bchannel message %d.\n", param->bchannel.type); + } + return(0); + } + + /* handle new ref */ + if (message_type == MESSAGE_NEWREF) { + if (param->direction) { + /* new ref from lcr */ + CDEBUG(NULL, NULL, "Received new ref by LCR, due to incomming call. (ref=%ld)\n", ref); + if (!ref || find_call_ref(ref)) { + CERROR(NULL, NULL, "Illegal new ref %ld received.\n", ref); + return(-1); + } + /* allocate new call instance */ + call = alloc_call(); + /* new state */ + call->state = CHAN_LCR_STATE_IN_PREPARE; + /* set ref */ + call->ref = ref; + call->ref_was_assigned = 1; + /* set dtmf (default, use option 'n' to disable */ + call->dsp_dtmf = 1; + /* wait for setup (or release from asterisk) */ + } else { + /* new ref, as requested from this remote application */ + CDEBUG(NULL, NULL, "Received new ref by LCR, as requested from chan_lcr. (ref=%ld)\n", ref); + call = find_call_ref(0); + if (!call) { + /* send release, if ref does not exist */ + CDEBUG(NULL, NULL, "No call found, that requests a ref.\n"); + send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL); + return(0); + } + /* store new ref */ + call->ref = ref; + call->ref_was_assigned = 1; + /* send pending setup info */ + if (call->state == CHAN_LCR_STATE_OUT_PREPARE) + send_setup_to_lcr(call); + /* release if asterisk has signed off */ + else if (call->state == CHAN_LCR_STATE_RELEASE) { + /* send release */ + if (call->cause) + send_release_and_import(call, call->cause, call->location); + else + send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL); + /* free call */ + free_call(call); + return(0); + } + } + return(0); + } + + /* check ref */ + if (!ref) { + CERROR(NULL, NULL, "Received message %d without ref.\n", message_type); + return(-1); + } + call = find_call_ref(ref); + if (!call) { + /* ignore ref that is not used (anymore) */ + CDEBUG(NULL, NULL, "Message %d from LCR ignored, because no call instance found.\n", message_type); + return(0); + } + + /* handle messages */ + switch(message_type) { + case MESSAGE_SETUP: + lcr_in_setup(call, message_type, param); + break; + + case MESSAGE_OVERLAP: + lcr_in_overlap(call, message_type, param); + break; + + case MESSAGE_PROCEEDING: + lcr_in_proceeding(call, message_type, param); + break; + + case MESSAGE_ALERTING: + lcr_in_alerting(call, message_type, param); + break; + + case MESSAGE_CONNECT: + lcr_in_connect(call, message_type, param); + break; + + case MESSAGE_DISCONNECT: + lcr_in_disconnect(call, message_type, param); + break; + + case MESSAGE_RELEASE: + lcr_in_release(call, message_type, param); + break; + + case MESSAGE_INFORMATION: + lcr_in_information(call, message_type, param); + break; + + case MESSAGE_NOTIFY: + lcr_in_notify(call, message_type, param); + break; + + case MESSAGE_FACILITY: + lcr_in_facility(call, message_type, param); + break; + + case MESSAGE_PATTERN: // audio available from LCR + if (!call->has_pattern) + lcr_in_pattern(call, message_type, param); + break; + + case MESSAGE_NOPATTERN: // audio not available from LCR + break; + + case MESSAGE_AUDIOPATH: // if remote audio connected or hold + call->audiopath = param->audiopath; + break; + + default: + CDEBUG(call, call->ast, "Message %d from LCR unhandled.\n", message_type); + break; + } + return(0); +} + +/* + * release all calls (due to broken socket) + */ +static void release_all_calls(void) +{ + struct chan_call *call; + +again: + call = call_first; + while(call) { + /* no ast, so we may directly free call */ + if (!call->ast) { + CDEBUG(call, NULL, "Freeing call, because no Asterisk channel is linked.\n"); + free_call(call); + goto again; + } + /* already in release process */ + if (call->state == CHAN_LCR_STATE_RELEASE) { + call = call->next; + continue; + } + /* release or queue release */ + call->ref = 0; + call->state = CHAN_LCR_STATE_RELEASE; + if (!call->pbx_started) { + CDEBUG(call, call->ast, "Releasing call, because no Asterisk channel is not started.\n"); + ast_hangup(call->ast); // call will be destroyed here + goto again; + } + CDEBUG(call, call->ast, "Queue call release, because Asterisk channel is running.\n"); + strcpy(call->queue_string, "H"); + call = call->next; + } + + /* release all bchannels */ + while(bchannel_first) + free_bchannel(bchannel_first); +} + + +/* asterisk handler + * warning! not thread safe + * returns -1 for socket error, 0 for no work, 1 for work + */ +int handle_socket(void) +{ + int work = 0; + int len; + struct admin_list *admin; + struct admin_message msg; + + /* read from socket */ + len = read(lcr_sock, &msg, sizeof(msg)); + if (len == 0) { + CERROR(NULL, NULL, "Socket closed.\n"); + return(-1); // socket closed + } + if (len > 0) { + if (len != sizeof(msg)) { + CERROR(NULL, NULL, "Socket short read. (len %d)\n", len); + return(-1); // socket error + } + if (msg.message != ADMIN_MESSAGE) { + CERROR(NULL, NULL, "Socket received illegal message %d.\n", msg.message); + return(-1); + } + receive_message(msg.u.msg.type, msg.u.msg.ref, &msg.u.msg.param); + work = 1; + } else { + if (errno != EWOULDBLOCK) { + CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno); + return(-1); + } + } + + /* write to socket */ + if (!admin_first) + return(work); + admin = admin_first; + len = write(lcr_sock, &admin->msg, sizeof(msg)); + if (len == 0) { + CERROR(NULL, NULL, "Socket closed.\n"); + return(-1); // socket closed + } + if (len > 0) { + if (len != sizeof(msg)) { + CERROR(NULL, NULL, "Socket short write. (len %d)\n", len); + return(-1); // socket error + } + /* free head */ + admin_first = admin->next; + free(admin); + + work = 1; + } else { + if (errno != EWOULDBLOCK) { + CERROR(NULL, NULL, "Socket failed (errno %d).\n", errno); + return(-1); + } + } + + return(work); +} + +/* + * open and close socket and thread + */ +int open_socket(void) +{ + int ret; int conn; struct sockaddr_un sock_address; - int ret; - unsigned long on = 1; + unsigned int on = 1; union parameter param; + + /* open socket */ + if ((lcr_sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { + CERROR(NULL, NULL, "Failed to create socket.\n"); + return(lcr_sock); + } + + /* set socket address and name */ + memset(&sock_address, 0, sizeof(sock_address)); + sock_address.sun_family = PF_UNIX; + sprintf(sock_address.sun_path, SOCKET_NAME, options.lock); + + /* connect socket */ + if ((conn = connect(lcr_sock, (struct sockaddr *)&sock_address, SUN_LEN(&sock_address))) < 0) { + close(lcr_sock); + lcr_sock = -1; + CDEBUG(NULL, NULL, "Failed to connect to socket '%s'. Is LCR running?\n", sock_address.sun_path); + return(conn); + } + + /* set non-blocking io */ + if ((ret = ioctl(lcr_sock, FIONBIO, (unsigned char *)(&on))) < 0) { + close(lcr_sock); + lcr_sock = -1; + CERROR(NULL, NULL, "Failed to set socket into non-blocking IO.\n"); + return(ret); + } + + /* enque hello message */ + memset(¶m, 0, sizeof(param)); + strcpy(param.hello.application, "asterisk"); + send_message(MESSAGE_HELLO, 0, ¶m); + + return(lcr_sock); +} + +void close_socket(void) +{ + struct admin_list *admin, *temp; + + /* flush pending messages */ + admin = admin_first; + while(admin) { + temp = admin; + admin = admin->next; + free(temp); + } + admin_first = NULL; + + /* close socket */ + if (lcr_sock >= 0) + close(lcr_sock); + lcr_sock = -1; +} + + +/* sending queue to asterisk */ +static int queue_send(void) +{ + int work = 0; + struct chan_call *call; + struct ast_channel *ast; + struct ast_frame fr; + char *p; + + call = call_first; + while(call) { + p = call->queue_string; + ast = call->ast; + if (*p && ast) { + /* there is something to queue */ + if (!ast_channel_trylock(ast)) { /* succeed */ + while(*p) { + switch (*p) { + case 'T': + CDEBUG(call, ast, "Sending queued PROGRESS to Asterisk.\n"); + ast_queue_control(ast, AST_CONTROL_PROGRESS); + break; + case 'P': + CDEBUG(call, ast, "Sending queued PROCEEDING to Asterisk.\n"); + ast_queue_control(ast, AST_CONTROL_PROCEEDING); + break; + case 'R': + CDEBUG(call, ast, "Sending queued RINGING to Asterisk.\n"); + ast_queue_control(ast, AST_CONTROL_RINGING); + ast_setstate(ast, AST_STATE_RINGING); + break; + case 'N': + CDEBUG(call, ast, "Sending queued ANSWER to Asterisk.\n"); + ast_queue_control(ast, AST_CONTROL_ANSWER); + break; + case 'H': + CDEBUG(call, ast, "Sending queued HANGUP to Asterisk.\n"); + ast_queue_hangup(ast); + break; + case '1': case '2': case '3': case 'A': + case '4': case '5': case '6': case 'B': + case '7': case '8': case '9': case 'C': + case '*': case '0': case '#': case 'D': + CDEBUG(call, ast, "Sending queued digit '%c' to Asterisk.\n", *p); + /* send digit to asterisk */ + memset(&fr, 0, sizeof(fr)); + + #ifdef LCR_FOR_ASTERISK + fr.frametype = AST_FRAME_DTMF_BEGIN; + #endif + + #ifdef LCR_FOR_CALLWEAVER + fr.frametype = AST_FRAME_DTMF; + #endif + + fr.subclass = *p; + fr.delivery = ast_tv(0, 0); + ast_queue_frame(ast, &fr); + + #ifdef LCR_FOR_ASTERISK + fr.frametype = AST_FRAME_DTMF_END; + ast_queue_frame(ast, &fr); + #endif + + break; + default: + CDEBUG(call, ast, "Ignoring queued digit 0x%02x.\n", *p); + } + p++; + } + call->queue_string[0] = '\0'; + ast_channel_unlock(ast); + work = 1; + } + } + call = call->next; + } + + return work; +} + +/* signal handler */ +void sighandler(int sigset) +{ +} + +/* chan_lcr thread */ +static void *chan_thread(void *arg) +{ int work; + int ret; + union parameter param; + time_t retry = 0, now; + + bchannel_pid = getpid(); + +// signal(SIGPIPE, sighandler); + + memset(¶m, 0, sizeof(union parameter)); + if (lcr_sock < 0) + time(&retry); + + ast_mutex_lock(&chan_lock); + + while(!quit) { + work = 0; + + if (lcr_sock > 0) { + /* handle socket */ + ret = handle_socket(); + if (ret < 0) { + CERROR(NULL, NULL, "Handling of socket failed - closing for some seconds.\n"); + close_socket(); + release_all_calls(); + time(&retry); + } + if (ret) + work = 1; + } else { + time(&now); + if (retry && now-retry > 5) { + CDEBUG(NULL, NULL, "Retry to open socket.\n"); + retry = 0; + if (open_socket() < 0) { + time(&retry); + } + work = 1; + } + + } + + /* handle mISDN */ + ret = bchannel_handle(); + if (ret) + work = 1; + + /* handle messages to asterisk */ + ret = queue_send(); + if (ret) + work = 1; + + /* delay if no work done */ + if (!work) { + ast_mutex_unlock(&chan_lock); + + #ifdef LCR_FOR_ASTERISK + usleep(30000); + #endif + + #ifdef LCR_FOR_CALLWEAVER + usleep(20000); + #endif + + ast_mutex_lock(&chan_lock); + } + } + + close_socket(); + + CERROR(NULL, NULL, "Thread exit.\n"); + + ast_mutex_unlock(&chan_lock); + +// signal(SIGPIPE, SIG_DFL); + + return NULL; +} + +/* + * new asterisk instance + */ +static +struct ast_channel *lcr_request(const char *type, int format, void *data, int *cause) +{ + char exten[256], *dial, *interface, *opt; + struct ast_channel *ast; + struct chan_call *call; + + ast_mutex_lock(&chan_lock); + CDEBUG(NULL, NULL, "Received request from Asterisk. (data=%s)\n", (char *)data); + + /* if socket is closed */ + if (lcr_sock < 0) { + CERROR(NULL, NULL, "Rejecting call from Asterisk, because LCR not running.\n"); + ast_mutex_unlock(&chan_lock); + return NULL; + } + + /* create call instance */ + call = alloc_call(); + if (!call) { + /* failed to create instance */ + ast_mutex_unlock(&chan_lock); + return NULL; + } + + /* create asterisk channel instrance */ + + #ifdef LCR_FOR_ASTERISK + ast = ast_channel_alloc(1, AST_STATE_RESERVED, NULL, NULL, "", NULL, "", 0, "%s/%d", lcr_type, ++glob_channel); + #endif + + #ifdef LCR_FOR_CALLWEAVER + ast = ast_channel_alloc(1); + #endif + + if (!ast) { + CERROR(NULL, NULL, "Failed to create Asterisk channel.\n"); + free_call(call); + /* failed to create instance */ + ast_mutex_unlock(&chan_lock); + return NULL; + } + ast->tech = &lcr_tech; + ast->tech_pvt = (void *)1L; // set pointer or asterisk will not call + /* configure channel */ + ast->nativeformats = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW; + ast->readformat = ast->rawreadformat = ast->nativeformats; + ast->writeformat = ast->rawwriteformat = ast->nativeformats; + ast->priority = 1; + ast->hangupcause = 0; + + /* link together */ + call->ast = ast; + ast->tech_pvt = call; + ast->fds[0] = call->pipe[0]; + call->pbx_started = 0; + /* set state */ + call->state = CHAN_LCR_STATE_OUT_PREPARE; + + /* + * Extract interface, dialstring, options from data. + * Formats can be: + * + * / + * //options + */ + strncpy(exten, (char *)data, sizeof(exten)-1); + exten[sizeof(exten)-1] = '\0'; + if ((dial = strchr(exten, '/'))) { + *dial++ = '\0'; + interface = exten; + if ((opt = strchr(dial, '/'))) + *opt++ = '\0'; + else + opt = ""; + } else { + dial = exten; + interface = ""; + opt = ""; + } + strncpy(call->interface, interface, sizeof(call->interface)-1); + strncpy(call->dialstring, dial, sizeof(call->dialstring)-1); + apply_opt(call, (char *)opt); + + ast_mutex_unlock(&chan_lock); + return ast; +} + +/* + * call from asterisk + */ +static int lcr_call(struct ast_channel *ast, char *dest, int timeout) +{ + union parameter newparam; + struct chan_call *call; + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + + #ifdef LCR_FOR_CALLWEAVER + ast->type = "LCR"; + snprintf(ast->name, sizeof(ast->name), "LCR/%s-%04x",call->dialstring, ast_random() & 0xffff); + #endif + + if (!call) { + CERROR(NULL, ast, "Received call from Asterisk, but call instance does not exist.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } + + CDEBUG(NULL, ast, "Received call from Asterisk.\n"); + + /* pbx process is started */ + call->pbx_started = 1; + /* send MESSAGE_NEWREF */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.direction = 0; /* request from app */ + send_message(MESSAGE_NEWREF, 0, &newparam); + + /* set hdlc if capability requires hdlc */ + if (ast->transfercapability == INFO_BC_DATAUNRESTRICTED + || ast->transfercapability == INFO_BC_DATARESTRICTED + || ast->transfercapability == INFO_BC_VIDEO) + call->hdlc = 1; + /* if hdlc is forced by option, we change transcap to data */ + if (call->hdlc + && ast->transfercapability != INFO_BC_DATAUNRESTRICTED + && ast->transfercapability != INFO_BC_DATARESTRICTED + && ast->transfercapability != INFO_BC_VIDEO) + ast->transfercapability = INFO_BC_DATAUNRESTRICTED; + + call->cid_num[0] = 0; + call->cid_name[0] = 0; + call->cid_rdnis[0] = 0; + + if (ast->cid.cid_num) if (ast->cid.cid_num[0]) + strncpy(call->cid_num, ast->cid.cid_num, + sizeof(call->cid_num)-1); + + if (ast->cid.cid_name) if (ast->cid.cid_name[0]) + strncpy(call->cid_name, ast->cid.cid_name, + sizeof(call->cid_name)-1); + if (ast->cid.cid_rdnis) if (ast->cid.cid_rdnis[0]) + strncpy(call->cid_rdnis, ast->cid.cid_rdnis, + sizeof(call->cid_rdnis)-1); + + ast_mutex_unlock(&chan_lock); + return 0; +} + +static void send_digit_to_chan(struct ast_channel * ast, char digit ) +{ + static const char* dtmf_tones[] = { + "!941+1336/100,!0/100", /* 0 */ + "!697+1209/100,!0/100", /* 1 */ + "!697+1336/100,!0/100", /* 2 */ + "!697+1477/100,!0/100", /* 3 */ + "!770+1209/100,!0/100", /* 4 */ + "!770+1336/100,!0/100", /* 5 */ + "!770+1477/100,!0/100", /* 6 */ + "!852+1209/100,!0/100", /* 7 */ + "!852+1336/100,!0/100", /* 8 */ + "!852+1477/100,!0/100", /* 9 */ + "!697+1633/100,!0/100", /* A */ + "!770+1633/100,!0/100", /* B */ + "!852+1633/100,!0/100", /* C */ + "!941+1633/100,!0/100", /* D */ + "!941+1209/100,!0/100", /* * */ + "!941+1477/100,!0/100" }; /* # */ + + if (digit >= '0' && digit <='9') + ast_playtones_start(ast,0,dtmf_tones[digit-'0'], 0); + else if (digit >= 'A' && digit <= 'D') + ast_playtones_start(ast,0,dtmf_tones[digit-'A'+10], 0); + else if (digit == '*') + ast_playtones_start(ast,0,dtmf_tones[14], 0); + else if (digit == '#') + ast_playtones_start(ast,0,dtmf_tones[15], 0); + else { + /* not handled */ + ast_log(LOG_DEBUG, "Unable to handle DTMF tone " + "'%c' for '%s'\n", digit, ast->name); + } +} + +#ifdef LCR_FOR_ASTERISK +static int lcr_digit_begin(struct ast_channel *ast, char digit) +#endif +#ifdef LCR_FOR_CALLWEAVER +static int lcr_digit(struct ast_channel *ast, char digit) +#endif +{ + struct chan_call *call; + union parameter newparam; + char buf[]="x"; + +#ifdef LCR_FOR_CALLWEAVER + int inband_dtmf = 0; +#endif + + /* only pass IA5 number space */ + if (digit > 126 || digit < 32) + return 0; + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received digit from Asterisk, but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } + + CDEBUG(call, ast, "Received digit '%c' from Asterisk.\n", digit); + + /* send information or queue them */ + if (call->ref && call->state == CHAN_LCR_STATE_OUT_DIALING) { + CDEBUG(call, ast, "Sending digit to LCR, because we are in dialing state.\n"); + memset(&newparam, 0, sizeof(union parameter)); + if (call->keypad) { + newparam.information.keypad[0] = digit; + newparam.information.keypad[1] = '\0'; + } else { + newparam.information.id[0] = digit; + newparam.information.id[1] = '\0'; + } + send_message(MESSAGE_INFORMATION, call->ref, &newparam); + } else + if (!call->ref + && (call->state == CHAN_LCR_STATE_OUT_PREPARE || call->state == CHAN_LCR_STATE_OUT_SETUP)) { + CDEBUG(call, ast, "Queue digits, because we are in setup/dialing state and have no ref yet.\n"); + *buf = digit; + strncat(call->dialque, buf, strlen(call->dialque)-1); + } - /* open socket */ - if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) - { - fprintf(stderr, "Failed to create socket.\n"); - exit(EXIT_FAILURE); + ast_mutex_unlock(&chan_lock); + +#ifdef LCR_FOR_ASTERISK + return(0); +} + +static int lcr_digit_end(struct ast_channel *ast, char digit, unsigned int duration) +{ + int inband_dtmf = 0; + struct chan_call *call; +#endif + + ast_mutex_lock(&chan_lock); + + call = ast->tech_pvt; + + if (!call) { + CERROR(NULL, ast, + "Received digit from Asterisk, " + "but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; } - /* set socket address and name */ - memset(&sock_address, 0, sizeof(sock_address)); - sock_address.sun_family = PF_UNIX; - strcpy(sock_address.sun_path, socket_name); + CDEBUG(call, ast, "DIGIT END '%c' from Asterisk.\n", digit); - /* connect socket */ - if ((conn = connect(sock, (struct sockaddr *)&sock_address, SUN_LEN(&sock_address))) < 0) - { - close(sock); - fprintf(stderr, "Failed to connect to socket \"%s\".\nIs LCR running?\n", sock_address.sun_path); - exit(EXIT_FAILURE); + if (call->state == CHAN_LCR_STATE_CONNECT && call->inband_dtmf) { + inband_dtmf = 1; } - /* set non-blocking io */ - if (ioctl(sock, FIONBIO, (unsigned char *)(&on)) < 0) - { - close(sock); - fprintf(stderr, "Failed to set socket into non-blocking IO.\n"); - exit(EXIT_FAILURE); + ast_mutex_unlock(&chan_lock); + + if (inband_dtmf) { + CDEBUG(call, ast, "-> sending '%c' inband.\n", digit); + send_digit_to_chan(ast, digit); } - /* enque hello message */ - memset(¶m, 0, sizeof(param)); - strcpy(param.hello.application, "asterisk"); - send_message(MESSAGE_HELLO, 0, ¶m); + return (0); +} + +static int lcr_answer(struct ast_channel *ast) +{ + union parameter newparam; + struct chan_call *call; - /* bchannel */ - if (!bchannel_initialize()) - goto bchannel_failed; + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received answer from Asterisk, but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } - while(42) - { - work = 0; + CDEBUG(call, ast, "Received answer from Asterisk (maybe during lcr_bridge).\n"); + + /* copy connectinfo, if bridged */ + if (call->bridge_call) + memcpy(&call->connectinfo, &call->bridge_call->connectinfo, sizeof(struct connect_info)); + /* send connect message to lcr */ + if (call->state != CHAN_LCR_STATE_CONNECT) { + memset(&newparam, 0, sizeof(union parameter)); + memcpy(&newparam.connectinfo, &call->connectinfo, sizeof(struct connect_info)); + send_message(MESSAGE_CONNECT, call->ref, &newparam); + call->state = CHAN_LCR_STATE_CONNECT; + } + /* change state */ + /* request bchannel */ + if (!call->bchannel) { + CDEBUG(call, ast, "Requesting B-channel.\n"); + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_REQUEST; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); + } + /* enable keypad */ +// memset(&newparam, 0, sizeof(union parameter)); +// send_message(MESSAGE_ENABLEKEYPAD, call->ref, &newparam); + + ast_mutex_unlock(&chan_lock); + return 0; +} + +static int lcr_hangup(struct ast_channel *ast) +{ + struct chan_call *call; + pthread_t tid = pthread_self(); + + if (!pthread_equal(tid, chan_tid)) + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received hangup from Asterisk, but no call instance exists.\n"); + if (!pthread_equal(tid, chan_tid)) + ast_mutex_unlock(&chan_lock); + return -1; + } + + if (!pthread_equal(tid, chan_tid)) + CDEBUG(call, ast, "Received hangup from Asterisk thread.\n"); + else + CDEBUG(call, ast, "Received hangup from LCR thread.\n"); + + /* disconnect asterisk, maybe not required */ + ast->tech_pvt = NULL; + ast->fds[0] = -1; + if (call->ref) { + /* release */ + CDEBUG(call, ast, "Releasing ref and freeing call instance.\n"); + if (ast->hangupcause > 0) + send_release_and_import(call, ast->hangupcause, LOCATION_PRIVATE_LOCAL); + else + send_release_and_import(call, CAUSE_NORMAL, LOCATION_PRIVATE_LOCAL); + /* remove call */ + free_call(call); + if (!pthread_equal(tid, chan_tid)) + ast_mutex_unlock(&chan_lock); + return 0; + } else { + /* ref is not set, due to prepare setup or release */ + if (call->state == CHAN_LCR_STATE_RELEASE) { + /* we get the response to our release */ + CDEBUG(call, ast, "Freeing call instance, because we have no ref AND we are requesting no ref.\n"); + free_call(call); + } else { + /* during prepare, we change to release state */ + CDEBUG(call, ast, "We must wait until we received our ref, until we can free call instance.\n"); + call->state = CHAN_LCR_STATE_RELEASE; + call->ast = NULL; + } + } + if (!pthread_equal(tid, chan_tid)) + ast_mutex_unlock(&chan_lock); + return 0; +} + +static int lcr_write(struct ast_channel *ast, struct ast_frame *f) +{ + struct chan_call *call; + + if (!f->subclass) + CDEBUG(NULL, ast, "No subclass\n"); + if (!(f->subclass & ast->nativeformats)) + CDEBUG(NULL, ast, "Unexpected format.\n"); + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + ast_mutex_unlock(&chan_lock); + return -1; + } + if (call->bchannel && f->samples) + bchannel_transmit(call->bchannel, *((unsigned char **)&(f->data)), f->samples); + ast_mutex_unlock(&chan_lock); + return 0; +} + + +static struct ast_frame *lcr_read(struct ast_channel *ast) +{ + struct chan_call *call; + int len; + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + ast_mutex_unlock(&chan_lock); + return NULL; + } + if (call->pipe[0] > -1) { + if (call->rebuffer && !call->hdlc) { + /* Make sure we have a complete 20ms (160byte) frame */ + len=read(call->pipe[0],call->read_buff + call->framepos, 160 - call->framepos); + if (len > 0) { + call->framepos += len; + } + } else { + len = read(call->pipe[0], call->read_buff, sizeof(call->read_buff)); + } + if (len < 0 && errno == EAGAIN) { + ast_mutex_unlock(&chan_lock); + + #ifdef LCR_FOR_ASTERISK + return &ast_null_frame; + #endif + + #ifdef LCR_FOR_CALLWEAVER + return &nullframe; + #endif + + } + if (len <= 0) { + close(call->pipe[0]); + call->pipe[0] = -1; + ast_mutex_unlock(&chan_lock); + return NULL; + } else if (call->rebuffer && call->framepos < 160) { + /* Not a complete frame, so we send a null-frame */ + ast_mutex_unlock(&chan_lock); + return &ast_null_frame; + } + } + + call->read_fr.frametype = AST_FRAME_VOICE; + call->read_fr.subclass = ast->nativeformats; + if (call->rebuffer) { + call->read_fr.datalen = call->framepos; + call->read_fr.samples = call->framepos; + call->framepos = 0; + } else { + call->read_fr.datalen = len; + call->read_fr.samples = len; + } + call->read_fr.delivery = ast_tv(0,0); + *((unsigned char **)&(call->read_fr.data)) = call->read_buff; + ast_mutex_unlock(&chan_lock); + + return &call->read_fr; +} + +static int lcr_indicate(struct ast_channel *ast, int cond, const void *data, size_t datalen) +{ + union parameter newparam; + int res = 0; + struct chan_call *call; - /* handle socket */ - ret = handle_socket(); - if (ret < 0) + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received indicate from Asterisk, but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } + + switch (cond) { + case AST_CONTROL_BUSY: + CDEBUG(call, ast, "Received indicate AST_CONTROL_BUSY from Asterisk.\n"); + ast_setstate(ast, AST_STATE_BUSY); + if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) { + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.disconnectinfo.cause = 17; + newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL; + send_message(MESSAGE_DISCONNECT, call->ref, &newparam); + /* change state */ + call->state = CHAN_LCR_STATE_OUT_DISCONNECT; + } + break; + case AST_CONTROL_CONGESTION: + CDEBUG(call, ast, "Received indicate AST_CONTROL_CONGESTION from Asterisk. (cause %d)\n", ast->hangupcause); + if (call->state != CHAN_LCR_STATE_OUT_DISCONNECT) { + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.disconnectinfo.cause = ast->hangupcause; + newparam.disconnectinfo.location = LOCATION_PRIVATE_LOCAL; + send_message(MESSAGE_DISCONNECT, call->ref, &newparam); + /* change state */ + call->state = CHAN_LCR_STATE_OUT_DISCONNECT; + } + break; + case AST_CONTROL_PROCEEDING: + CDEBUG(call, ast, "Received indicate AST_CONTROL_PROCEEDING from Asterisk.\n"); + if (call->state == CHAN_LCR_STATE_IN_SETUP + || call->state == CHAN_LCR_STATE_IN_DIALING) { + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + send_message(MESSAGE_PROCEEDING, call->ref, &newparam); + /* change state */ + call->state = CHAN_LCR_STATE_IN_PROCEEDING; + } + break; + case AST_CONTROL_RINGING: + CDEBUG(call, ast, "Received indicate AST_CONTROL_RINGING from Asterisk.\n"); + ast_setstate(ast, AST_STATE_RING); + if (call->state == CHAN_LCR_STATE_IN_SETUP + || call->state == CHAN_LCR_STATE_IN_DIALING + || call->state == CHAN_LCR_STATE_IN_PROCEEDING) { + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + send_message(MESSAGE_ALERTING, call->ref, &newparam); + /* change state */ + call->state = CHAN_LCR_STATE_IN_ALERTING; + } + break; + case AST_CONTROL_PROGRESS: + CDEBUG(call, ast, "Received indicate AST_CONTROL_PROGRESS from Asterisk.\n"); + /* request bchannel */ + if (!call->bchannel) { + CDEBUG(call, ast, "Requesting B-channel.\n"); + memset(&newparam, 0, sizeof(union parameter)); + newparam.bchannel.type = BCHANNEL_REQUEST; + send_message(MESSAGE_BCHANNEL, call->ref, &newparam); + } + break; + case -1: + CDEBUG(call, ast, "Received indicate -1.\n"); + res = -1; break; - if (ret) - work = 1; - /* handle mISDN */ - ret = bchannel_handle(); - if (ret) - work = 1; + case AST_CONTROL_VIDUPDATE: + CDEBUG(call, ast, "Received indicate AST_CONTROL_VIDUPDATE.\n"); + res = -1; + break; + case AST_CONTROL_HOLD: + CDEBUG(call, ast, "Received indicate AST_CONTROL_HOLD from Asterisk.\n"); + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_HOLD; + send_message(MESSAGE_NOTIFY, call->ref, &newparam); + + /*start music onhold*/ + #ifdef LCR_FOR_ASTERISK + ast_moh_start(ast,data,ast->musicclass); + #endif + + #ifdef LCR_FOR_CALLWEAVER + ast_moh_start(ast, NULL); + #endif + + call->on_hold = 1; + break; + case AST_CONTROL_UNHOLD: + CDEBUG(call, ast, "Received indicate AST_CONTROL_UNHOLD from Asterisk.\n"); + /* send message to lcr */ + memset(&newparam, 0, sizeof(union parameter)); + newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL; + send_message(MESSAGE_NOTIFY, call->ref, &newparam); + + /*stop moh*/ + ast_moh_stop(ast); + call->on_hold = 0; + break; +#ifdef AST_CONTROL_SRCUPDATE + case AST_CONTROL_SRCUPDATE: + CDEBUG(call, ast, "Received AST_CONTROL_SRCUPDATE from Asterisk.\n"); + break; +#endif + default: + CERROR(call, ast, "Received indicate from Asterisk with unknown condition %d.\n", cond); + res = -1; + break; + } + + /* return */ + ast_mutex_unlock(&chan_lock); + return res; +} + +/* + * fixup asterisk + */ +static int lcr_fixup(struct ast_channel *oldast, struct ast_channel *ast) +{ + struct chan_call *call; + + if (!ast) { + return -1; + } + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received fixup from Asterisk, but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } + + CDEBUG(call, ast, "Received fixup from Asterisk.\n"); + call->ast = ast; + ast_mutex_unlock(&chan_lock); + return 0; +} + +/* + * send_text asterisk + */ +static int lcr_send_text(struct ast_channel *ast, const char *text) +{ + struct chan_call *call; + union parameter newparam; + + ast_mutex_lock(&chan_lock); + call = ast->tech_pvt; + if (!call) { + CERROR(NULL, ast, "Received send_text from Asterisk, but no call instance exists.\n"); + ast_mutex_unlock(&chan_lock); + return -1; + } + + CDEBUG(call, ast, "Received send_text from Asterisk. (text=%s)\n", text); + memset(&newparam, 0, sizeof(union parameter)); + strncpy(newparam.notifyinfo.display, text, sizeof(newparam.notifyinfo.display)-1); + send_message(MESSAGE_NOTIFY, call->ref, &newparam); + ast_mutex_lock(&chan_lock); + return 0; +} + +/* + * bridge process + */ +enum ast_bridge_result lcr_bridge(struct ast_channel *ast1, + struct ast_channel *ast2, int flags, + struct ast_frame **fo, + struct ast_channel **rc, int timeoutms) + +{ + struct chan_call *call1, *call2; + struct ast_channel *carr[2], *who; + int to; + struct ast_frame *f; + int bridge_id; + + CDEBUG(NULL, NULL, "Received bridging request from Asterisk.\n"); + + carr[0] = ast1; + carr[1] = ast2; + + /* join via dsp (if the channels are currently open) */ + ast_mutex_lock(&chan_lock); + call1 = ast1->tech_pvt; + call2 = ast2->tech_pvt; + if (!call1 || !call2) { + CDEBUG(NULL, NULL, "Bridge, but we don't have two call instances, exitting.\n"); + ast_mutex_unlock(&chan_lock); + return AST_BRIDGE_COMPLETE; + } + + /* join, if both call instances uses dsp + ignore the case of fax detection here it may be benificial for ISDN fax machines or pass through. + */ + if (!call1->nodsp && !call2->nodsp) { + CDEBUG(NULL, NULL, "Both calls use DSP, bridging via DSP.\n"); + + /* get bridge id and join */ + bridge_id = new_bridge_id(); + + call1->bridge_id = bridge_id; + if (call1->bchannel) + bchannel_join(call1->bchannel, bridge_id); + + call2->bridge_id = bridge_id; + if (call2->bchannel) + bchannel_join(call2->bchannel, bridge_id); + } else + if (call1->nodsp && call2->nodsp) + CDEBUG(NULL, NULL, "Both calls use no DSP, bridging in channel driver.\n"); + else + CDEBUG(NULL, NULL, "One call uses no DSP, bridging in channel driver.\n"); + call1->bridge_call = call2; + call2->bridge_call = call1; + + if (call1->state == CHAN_LCR_STATE_IN_SETUP + || call1->state == CHAN_LCR_STATE_IN_DIALING + || call1->state == CHAN_LCR_STATE_IN_PROCEEDING + || call1->state == CHAN_LCR_STATE_IN_ALERTING) { + CDEBUG(call1, ast1, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n"); + lcr_answer(ast1); + } + if (call2->state == CHAN_LCR_STATE_IN_SETUP + || call2->state == CHAN_LCR_STATE_IN_DIALING + || call2->state == CHAN_LCR_STATE_IN_PROCEEDING + || call2->state == CHAN_LCR_STATE_IN_ALERTING) { + CDEBUG(call2, ast2, "Bridge established before lcr_answer, so we call it ourself: Calling lcr_answer...\n"); + lcr_answer(ast2); + } + + /* sometimes SIP phones forget to send RETRIEVE before TRANSFER + so let's do it for them. Hmpf. + */ + + if (call1->on_hold) { + union parameter newparam; + + memset(&newparam, 0, sizeof(union parameter)); + newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL; + send_message(MESSAGE_NOTIFY, call1->ref, &newparam); + + call1->on_hold = 0; + } + + if (call2->on_hold) { + union parameter newparam; + + memset(&newparam, 0, sizeof(union parameter)); + newparam.notifyinfo.notify = INFO_NOTIFY_REMOTE_RETRIEVAL; + send_message(MESSAGE_NOTIFY, call2->ref, &newparam); + + call2->on_hold = 0; + } + + ast_mutex_unlock(&chan_lock); + + while(1) { + to = -1; + who = ast_waitfor_n(carr, 2, &to); + + if (!who) { + CDEBUG(NULL, NULL, "Empty read on bridge, breaking out.\n"); + break; + } + f = ast_read(who); + + if (!f || f->frametype == AST_FRAME_CONTROL) { + if (!f) + CDEBUG(NULL, NULL, "Got hangup.\n"); + else + CDEBUG(NULL, NULL, "Got CONTROL.\n"); + /* got hangup .. */ + *fo=f; + *rc=who; + break; + } + + if ( f->frametype == AST_FRAME_DTMF ) { + CDEBUG(NULL, NULL, "Got DTMF.\n"); + *fo=f; + *rc=who; + break; + } + + + if (who == ast1) { + ast_write(ast2,f); + } + else { + ast_write(ast1,f); + } + + } + + CDEBUG(NULL, NULL, "Releasing bridge.\n"); + + /* split channels */ + ast_mutex_lock(&chan_lock); + call1 = ast1->tech_pvt; + call2 = ast2->tech_pvt; + if (call1 && call1->bridge_id) { + call1->bridge_id = 0; + if (call1->bchannel) + bchannel_join(call1->bchannel, 0); + if (call1->bridge_call) + call1->bridge_call->bridge_call = NULL; + } + if (call2 && call1->bridge_id) { + call2->bridge_id = 0; + if (call2->bchannel) + bchannel_join(call2->bchannel, 0); + if (call2->bridge_call) + call2->bridge_call->bridge_call = NULL; + } + call1->bridge_call = NULL; + call2->bridge_call = NULL; + + ast_mutex_unlock(&chan_lock); + return AST_BRIDGE_COMPLETE; +} +static struct ast_channel_tech lcr_tech = { + .type="LCR", + .description = "Channel driver for connecting to Linux-Call-Router", + .capabilities = AST_FORMAT_ALAW, + .requester = lcr_request, + + #ifdef LCR_FOR_ASTERISK + .send_digit_begin = lcr_digit_begin, + .send_digit_end = lcr_digit_end, + #endif + + #ifdef LCR_FOR_CALLWEAVER + .send_digit = lcr_digit, + #endif + + .call = lcr_call, + .bridge = lcr_bridge, + .hangup = lcr_hangup, + .answer = lcr_answer, + .read = lcr_read, + .write = lcr_write, + .indicate = lcr_indicate, + .fixup = lcr_fixup, + .send_text = lcr_send_text, + .properties = 0 +}; + + +/* + * cli + */ +#if 0 +static int lcr_show_lcr (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_show_calls (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_reload_routing (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_reload_interfaces (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_port_block (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_port_unblock (int fd, int argc, char *argv[]) +{ + return 0; +} + +static int lcr_port_unload (int fd, int argc, char *argv[]) +{ + return 0; +} + +static struct ast_cli_entry cli_show_lcr = +{ {"lcr", "show", "lcr", NULL}, + lcr_show_lcr, + "Shows current states of LCR core", + "Usage: lcr show lcr\n", +}; + +static struct ast_cli_entry cli_show_calls = +{ {"lcr", "show", "calls", NULL}, + lcr_show_calls, + "Shows current calls made by LCR and Asterisk", + "Usage: lcr show calls\n", +}; + +static struct ast_cli_entry cli_reload_routing = +{ {"lcr", "reload", "routing", NULL}, + lcr_reload_routing, + "Reloads routing conf of LCR, current uncomplete calls will be disconnected", + "Usage: lcr reload routing\n", +}; + +static struct ast_cli_entry cli_reload_interfaces = +{ {"lcr", "reload", "interfaces", NULL}, + lcr_reload_interfaces, + "Reloads interfaces conf of LCR", + "Usage: lcr reload interfaces\n", +}; + +static struct ast_cli_entry cli_port_block = +{ {"lcr", "port", "block", NULL}, + lcr_port_block, + "Blocks LCR port for further calls", + "Usage: lcr port block \"\"\n", +}; + +static struct ast_cli_entry cli_port_unblock = +{ {"lcr", "port", "unblock", NULL}, + lcr_port_unblock, + "Unblocks or loads LCR port, port is opened my mISDN", + "Usage: lcr port unblock \"\"\n", +}; + +static struct ast_cli_entry cli_port_unload = +{ {"lcr", "port", "unload", NULL}, + lcr_port_unload, + "Unloads LCR port, port is closes by mISDN", + "Usage: lcr port unload \"\"\n", +}; +#endif + + +#ifdef LCR_FOR_ASTERISK +static int lcr_config_exec(struct ast_channel *ast, void *data) +#endif + +#ifdef LCR_FOR_CALLWEAVER +static int lcr_config_exec(struct ast_channel *ast, void *data, char **argv) +#endif +{ + struct chan_call *call; + + ast_mutex_lock(&chan_lock); + + #ifdef LCR_FOR_ASTERISK + CDEBUG(NULL, ast, "Received lcr_config (data=%s)\n", (char *)data); + #endif + + #ifdef LCR_FOR_CALLWEAVER + CDEBUG(NULL, ast, "Received lcr_config (data=%s)\n", argv[0]); + #endif + + /* find channel */ + call = call_first; + while(call) { + if (call->ast == ast) + break; + call = call->next; + } + if (call) + + #ifdef LCR_FOR_ASTERISK + apply_opt(call, (char *)data); + #endif + + #ifdef LCR_FOR_CALLWEAVER + apply_opt(call, (char *)argv[0]); + #endif + + else + CERROR(NULL, ast, "lcr_config app not called by chan_lcr channel.\n"); + + ast_mutex_unlock(&chan_lock); + return 0; +} + +/* + * module loading and destruction + */ +int load_module(void) +{ + u_short i; + + for (i = 0; i < 256; i++) { + flip_bits[i] = (i>>7) | ((i>>5)&2) | ((i>>3)&4) | ((i>>1)&8) + | (i<<7) | ((i&2)<<5) | ((i&4)<<3) | ((i&8)<<1); + } + + if (read_options() == 0) { + CERROR(NULL, NULL, "%s", options_error); + + #ifdef LCR_FOR_ASTERISK + return AST_MODULE_LOAD_DECLINE; + #endif + + #ifdef LCR_FOR_CALLWEAVER + return 0; + #endif + + } + + ast_mutex_init(&chan_lock); + ast_mutex_init(&log_lock); + + if (open_socket() < 0) { + /* continue with closed socket */ + } + + if (bchannel_initialize()) { + CERROR(NULL, NULL, "Unable to open mISDN device\n"); + close_socket(); + + #ifdef LCR_FOR_ASTERISK + return AST_MODULE_LOAD_DECLINE; + #endif + + #ifdef LCR_FOR_CALLWEAVER + return 0; + #endif + } + mISDN_created = 1; + + lcr_tech.capabilities = (options.law=='a')?AST_FORMAT_ALAW:AST_FORMAT_ULAW; + if (ast_channel_register(&lcr_tech)) { + CERROR(NULL, NULL, "Unable to register channel class\n"); + bchannel_deinitialize(); + close_socket(); + + #ifdef LCR_FOR_ASTERISK + return AST_MODULE_LOAD_DECLINE; + #endif + + #ifdef LCR_FOR_CALLWEAVER + return 0; + #endif + } + + ast_register_application("lcr_config", lcr_config_exec, "lcr_config", + + #ifdef LCR_FOR_ASTERISK + "lcr_config(::...)\n" + #endif + + #ifdef LCR_FOR_CALLWEAVER + "lcr_config(::...)\n", + #endif + + "Sets LCR opts. and optargs\n" + "\n" + "The available options are:\n" + " d - Send display text on called phone, text is the optarg.\n" + " n - Don't detect dtmf tones on called channel.\n" + " h - Force data call (HDLC).\n" + " t - Disable mISDN_dsp features (required for fax application).\n" + " f - Adding fax detection. It it timeouts, mISDN_dsp is used.\n" + " Use time to detect for optarg.\n" + " c - Make crypted outgoing call, optarg is keyindex.\n" + " e - Perform echo cancelation on this channel.\n" + " Takes mISDN pipeline option as optarg.\n" + " s - Send Non Inband DTMF as inband.\n" + " r - re-buffer packets (160 bytes). Required for some SIP-phones and fax applications.\n" + " vr - rxgain control\n" + " vt - txgain control\n" + " Volume changes at factor 2 ^ optarg.\n" + " k - use keypad to dial this call.\n" + ); + + +#if 0 + ast_cli_register(&cli_show_lcr); + ast_cli_register(&cli_show_calls); + ast_cli_register(&cli_reload_routing); + ast_cli_register(&cli_reload_interfaces); + ast_cli_register(&cli_port_block); + ast_cli_register(&cli_port_unblock); + ast_cli_register(&cli_port_unload); +#endif + + quit = 0; + if ((pthread_create(&chan_tid, NULL, chan_thread, NULL)<0)) { + /* failed to create thread */ + bchannel_deinitialize(); + close_socket(); + ast_channel_unregister(&lcr_tech); + + #ifdef LCR_FOR_ASTERISK + return AST_MODULE_LOAD_DECLINE; + #endif + + #ifdef LCR_FOR_CALLWEAVER + return 0; + #endif - if (!work) - usleep(30000); } + return 0; +} + +int unload_module(void) +{ + /* First, take us out of the channel loop */ + CDEBUG(NULL, NULL, "-- Unregistering mISDN Channel Driver --\n"); - bchannel_deinitialize(); - bchannel_failed: + quit = 1; + pthread_join(chan_tid, NULL); - /* close socket */ - close(sock); - /* now we say good bye */ - if (ret) - { - printf("%s\n", ret); - exit(EXIT_FAILURE); + ast_channel_unregister(&lcr_tech); + + ast_unregister_application("lcr_config"); + + + if (mISDN_created) { + bchannel_deinitialize(); + mISDN_created = 0; + } + + if (lcr_sock >= 0) { + close(lcr_sock); + lcr_sock = -1; } + + return 0; } +int reload_module(void) +{ +// reload_config(); + return 0; +} +#ifdef LCR_FOR_ASTERISK +#define AST_MODULE "chan_lcr" +#endif +#ifdef LCR_FOR_CALLWEAVER +int usecount(void) +{ + int res; + ast_mutex_lock(&usecnt_lock); + res = usecnt; + ast_mutex_unlock(&usecnt_lock); + return res; +} +#endif +#ifdef LCR_FOR_ASTERISK +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Channel driver for Linux-Call-Router Support (ISDN BRI/PRI)", + .load = load_module, + .unload = unload_module, + .reload = reload_module, + ); +#endif +#ifdef LCR_FOR_CALLWEAVER +char *description(void) +{ + return desc; +} +#endif