/* * Asterisk -- An open source telephony toolkit. * * Copyright (C) 1999 - 2006, Digium, Inc. * * Mark Spencer * * See http://www.asterisk.org for more information about * the Asterisk project. Please do not directly contact * any of the maintainers of this project for assistance; * the project provides a web site, mailing lists and IRC * channels for your use. * * This program is free software, distributed under the terms of * the GNU General Public License Version 2. See the LICENSE file * at the top of the source tree. */ /*! \file * * \brief Implementation of Media Gateway Control Protocol * * \author Mark Spencer * * \par See also * \arg \ref Config_mgcp * * \ingroup channel_drivers */ #include "asterisk.h" ASTERISK_FILE_VERSION(__FILE__, "$Revision$") #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "asterisk/lock.h" #include "asterisk/channel.h" #include "asterisk/config.h" #include "asterisk/logger.h" #include "asterisk/module.h" #include "asterisk/pbx.h" #include "asterisk/options.h" #include "asterisk/lock.h" #include "asterisk/sched.h" #include "asterisk/io.h" #include "asterisk/rtp.h" #include "asterisk/acl.h" #include "asterisk/callerid.h" #include "asterisk/cli.h" #include "asterisk/say.h" #include "asterisk/cdr.h" #include "asterisk/astdb.h" #include "asterisk/features.h" #include "asterisk/app.h" #include "asterisk/musiconhold.h" #include "asterisk/utils.h" #include "asterisk/causes.h" #include "asterisk/dsp.h" #include "asterisk/devicestate.h" #include "asterisk/stringfields.h" #include "asterisk/abstract_jb.h" #ifndef IPTOS_MINCOST #define IPTOS_MINCOST 0x02 #endif /* * Define to work around buggy dlink MGCP phone firmware which * appears not to know that "rt" is part of the "G" package. */ /* #define DLINK_BUGGY_FIRMWARE */ #define MGCPDUMPER #define DEFAULT_EXPIRY 120 #define MAX_EXPIRY 3600 #define CANREINVITE 1 #ifndef INADDR_NONE #define INADDR_NONE (in_addr_t)(-1) #endif /*! Global jitterbuffer configuration - by default, jb is disabled */ static struct ast_jb_conf default_jbconf = { .flags = 0, .max_size = -1, .resync_threshold = -1, .impl = "" }; static struct ast_jb_conf global_jbconf; static const char tdesc[] = "Media Gateway Control Protocol (MGCP)"; static const char config[] = "mgcp.conf"; #define MGCP_DTMF_RFC2833 (1 << 0) #define MGCP_DTMF_INBAND (1 << 1) #define MGCP_DTMF_HYBRID (1 << 2) #define DEFAULT_MGCP_GW_PORT 2427 /*!< From RFC 2705 */ #define DEFAULT_MGCP_CA_PORT 2727 /*!< From RFC 2705 */ #define MGCP_MAX_PACKET 1500 /*!< Also from RFC 2543, should sub headers tho */ #define DEFAULT_RETRANS 1000 /*!< How frequently to retransmit */ #define MAX_RETRANS 5 /*!< Try only 5 times for retransmissions */ /*! MGCP rtp stream modes { */ #define MGCP_CX_SENDONLY 0 #define MGCP_CX_RECVONLY 1 #define MGCP_CX_SENDRECV 2 #define MGCP_CX_CONF 3 #define MGCP_CX_CONFERENCE 3 #define MGCP_CX_MUTE 4 #define MGCP_CX_INACTIVE 4 /*! } */ static char *mgcp_cxmodes[] = { "sendonly", "recvonly", "sendrecv", "confrnce", "inactive" }; enum { MGCP_CMD_EPCF, MGCP_CMD_CRCX, MGCP_CMD_MDCX, MGCP_CMD_DLCX, MGCP_CMD_RQNT, MGCP_CMD_NTFY, MGCP_CMD_AUEP, MGCP_CMD_AUCX, MGCP_CMD_RSIP }; static char context[AST_MAX_EXTENSION] = "default"; static char language[MAX_LANGUAGE] = ""; static char musicclass[MAX_MUSICCLASS] = ""; static char cid_num[AST_MAX_EXTENSION] = ""; static char cid_name[AST_MAX_EXTENSION] = ""; static int dtmfmode = 0; static int nat = 0; static ast_group_t cur_callergroup = 0; static ast_group_t cur_pickupgroup = 0; static int tos = 0; static int immediate = 0; static int callwaiting = 0; static int callreturn = 0; static int slowsequence = 0; static int threewaycalling = 0; /*! This is for flashhook transfers */ static int transfer = 0; static int cancallforward = 0; static int singlepath = 0; static int canreinvite = CANREINVITE; static char accountcode[AST_MAX_ACCOUNT_CODE] = ""; static char mailbox[AST_MAX_EXTENSION]; static int amaflags = 0; static int adsi = 0; static unsigned int oseq; /*! Wait up to 16 seconds for first digit (FXO logic) */ static int firstdigittimeout = 16000; /*! How long to wait for following digits (FXO logic) */ static int gendigittimeout = 8000; /*! How long to wait for an extra digit, if there is an ambiguous match */ static int matchdigittimeout = 3000; /*! Protect the monitoring thread, so only one process can kill or start it, and not when it's doing something critical. */ AST_MUTEX_DEFINE_STATIC(netlock); AST_MUTEX_DEFINE_STATIC(monlock); /*! This is the thread for the monitor which checks for input on the channels which are not currently in use. */ static pthread_t monitor_thread = AST_PTHREADT_NULL; static int restart_monitor(void); static int capability = AST_FORMAT_ULAW; static int nonCodecCapability = AST_RTP_DTMF; static char ourhost[MAXHOSTNAMELEN]; static struct in_addr __ourip; static int ourport; static int mgcpdebug = 0; static struct sched_context *sched; static struct io_context *io; /*! The private structures of the mgcp channels are linked for ! selecting outgoing channels */ #define MGCP_MAX_HEADERS 64 #define MGCP_MAX_LINES 64 struct mgcp_request { int len; char *verb; char *identifier; char *endpoint; char *version; int headers; /*!< MGCP Headers */ char *header[MGCP_MAX_HEADERS]; int lines; /*!< SDP Content */ char *line[MGCP_MAX_LINES]; char data[MGCP_MAX_PACKET]; int cmd; /*!< int version of verb = command */ unsigned int trid; /*!< int version of identifier = transaction id */ struct mgcp_request *next; /*!< next in the queue */ }; /*! \brief mgcp_message: MGCP message for queuing up */ struct mgcp_message { struct mgcp_endpoint *owner_ep; struct mgcp_subchannel *owner_sub; int retrans; unsigned long expire; unsigned int seqno; int len; struct mgcp_message *next; char buf[0]; }; #define RESPONSE_TIMEOUT 30 /*!< in seconds */ struct mgcp_response { time_t whensent; int len; int seqno; struct mgcp_response *next; char buf[0]; }; #define MAX_SUBS 2 #define SUB_REAL 0 #define SUB_ALT 1 struct mgcp_subchannel { /*! subchannel magic string. Needed to prove that any subchannel pointer passed by asterisk really points to a valid subchannel memory area. Ugly.. But serves the purpose for the time being. */ #define MGCP_SUBCHANNEL_MAGIC "!978!" char magic[6]; ast_mutex_t lock; int id; struct ast_channel *owner; struct mgcp_endpoint *parent; struct ast_rtp *rtp; struct sockaddr_in tmpdest; char txident[80]; /*! \todo FIXME txident is replaced by rqnt_ident in endpoint. This should be obsoleted */ char cxident[80]; char callid[80]; int cxmode; struct mgcp_request *cx_queue; /*!< pending CX commands */ ast_mutex_t cx_queue_lock; /*!< CX queue lock */ int nat; int iseq; /*!< Not used? RTP? */ int outgoing; int alreadygone; struct mgcp_subchannel *next; /*!< for out circular linked list */ }; #define MGCP_ONHOOK 1 #define MGCP_OFFHOOK 2 #define TYPE_TRUNK 1 #define TYPE_LINE 2 struct mgcp_endpoint { ast_mutex_t lock; char name[80]; struct mgcp_subchannel *sub; /*!< Pointer to our current connection, channel and stuff */ char accountcode[AST_MAX_ACCOUNT_CODE]; char exten[AST_MAX_EXTENSION]; /*!< Extention where to start */ char context[AST_MAX_EXTENSION]; char language[MAX_LANGUAGE]; char cid_num[AST_MAX_EXTENSION]; /*!< Caller*ID number */ char cid_name[AST_MAX_EXTENSION]; /*!< Caller*ID name */ char lastcallerid[AST_MAX_EXTENSION]; /*!< Last Caller*ID */ char call_forward[AST_MAX_EXTENSION]; /*!< Last Caller*ID */ char mailbox[AST_MAX_EXTENSION]; char musicclass[MAX_MUSICCLASS]; char curtone[80]; /*!< Current tone */ char dtmf_buf[AST_MAX_EXTENSION]; /*!< place to collect digits be */ ast_group_t callgroup; ast_group_t pickupgroup; int callwaiting; int hascallwaiting; int transfer; int threewaycalling; int singlepath; int cancallforward; int canreinvite; int callreturn; int dnd; /* How does this affect callwait? Do we just deny a mgcp_request if we're dnd? */ int hascallerid; int hidecallerid; int dtmfmode; int amaflags; int type; int slowsequence; /*!< MS: Sequence the endpoint as a whole */ int group; int iseq; /*!< Not used? */ int lastout; /*!< tracking this on the subchannels. Is it needed here? */ int needdestroy; /*!< Not used? */ int capability; int nonCodecCapability; int onhooktime; int msgstate; /*!< voicemail message state */ int immediate; int hookstate; int adsi; char rqnt_ident[80]; /*!< request identifier */ struct mgcp_request *rqnt_queue; /*!< pending RQNT commands */ ast_mutex_t rqnt_queue_lock; struct mgcp_request *cmd_queue; /*!< pending commands other than RQNT */ ast_mutex_t cmd_queue_lock; int delme; /*!< needed for reload */ int needaudit; /*!< needed for reload */ struct ast_dsp *dsp; /*!< XXX Should there be a dsp/subchannel? XXX */ /* owner is tracked on the subchannels, and the *sub indicates whos in charge */ /* struct ast_channel *owner; */ /* struct ast_rtp *rtp; */ /* struct sockaddr_in tmpdest; */ /* message go the the endpoint and not the channel so they stay here */ struct mgcp_endpoint *next; struct mgcp_gateway *parent; }; static struct mgcp_gateway { /* A gateway containing one or more endpoints */ char name[80]; int isnamedottedip; /*!< is the name FQDN or dotted ip */ struct sockaddr_in addr; struct sockaddr_in defaddr; struct in_addr ourip; int dynamic; int expire; /*!< XXX Should we ever expire dynamic registrations? XXX */ struct mgcp_endpoint *endpoints; struct ast_ha *ha; /* obsolete time_t lastouttime; int lastout; int messagepending; */ /* Wildcard endpoint name */ char wcardep[30]; struct mgcp_message *msgs; /*!< gw msg queue */ ast_mutex_t msgs_lock; /*!< queue lock */ int retransid; /*!< retrans timer id */ int delme; /*!< needed for reload */ struct mgcp_response *responses; struct mgcp_gateway *next; } *gateways; AST_MUTEX_DEFINE_STATIC(mgcp_reload_lock); static int mgcp_reloading = 0; /*! \brief gatelock: mutex for gateway/endpoint lists */ AST_MUTEX_DEFINE_STATIC(gatelock); static int mgcpsock = -1; static struct sockaddr_in bindaddr; static struct ast_frame *mgcp_read(struct ast_channel *ast); static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest); static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone); static int transmit_modify_request(struct mgcp_subchannel *sub); static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername); static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp *rtp, int codecs); static int transmit_connection_del(struct mgcp_subchannel *sub); static int transmit_audit_endpoint(struct mgcp_endpoint *p); static void start_rtp(struct mgcp_subchannel *sub); static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub, int result, unsigned int ident, struct mgcp_request *resp); static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub); static int mgcp_do_reload(void); static int mgcp_reload(int fd, int argc, char *argv[]); static struct ast_channel *mgcp_request(const char *type, int format, void *data, int *cause); static int mgcp_call(struct ast_channel *ast, char *dest, int timeout); static int mgcp_hangup(struct ast_channel *ast); static int mgcp_answer(struct ast_channel *ast); static struct ast_frame *mgcp_read(struct ast_channel *ast); static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame); static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen); static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan); static int mgcp_senddigit_begin(struct ast_channel *ast, char digit); static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration); static int mgcp_devicestate(void *data); static const struct ast_channel_tech mgcp_tech = { .type = "MGCP", .description = tdesc, .capabilities = AST_FORMAT_ULAW, .properties = AST_CHAN_TP_WANTSJITTER | AST_CHAN_TP_CREATESJITTER, .requester = mgcp_request, .devicestate = mgcp_devicestate, .call = mgcp_call, .hangup = mgcp_hangup, .answer = mgcp_answer, .read = mgcp_read, .write = mgcp_write, .indicate = mgcp_indicate, .fixup = mgcp_fixup, .send_digit_begin = mgcp_senddigit_begin, .send_digit_end = mgcp_senddigit_end, .bridge = ast_rtp_bridge, }; static int has_voicemail(struct mgcp_endpoint *p) { return ast_app_has_voicemail(p->mailbox, NULL); } static int unalloc_sub(struct mgcp_subchannel *sub) { struct mgcp_endpoint *p = sub->parent; if (p->sub == sub) { ast_log(LOG_WARNING, "Trying to unalloc the real channel %s@%s?!?\n", p->name, p->parent->name); return -1; } ast_log(LOG_DEBUG, "Released sub %d of channel %s@%s\n", sub->id, p->name, p->parent->name); sub->owner = NULL; if (!ast_strlen_zero(sub->cxident)) { transmit_connection_del(sub); } sub->cxident[0] = '\0'; sub->callid[0] = '\0'; sub->cxmode = MGCP_CX_INACTIVE; sub->outgoing = 0; sub->alreadygone = 0; memset(&sub->tmpdest, 0, sizeof(sub->tmpdest)); if (sub->rtp) { ast_rtp_destroy(sub->rtp); sub->rtp = NULL; } dump_cmd_queues(NULL, sub); /* SC */ return 0; } /* modified for new transport mechanism */ static int __mgcp_xmit(struct mgcp_gateway *gw, char *data, int len) { int res; if (gw->addr.sin_addr.s_addr) res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->addr, sizeof(struct sockaddr_in)); else res=sendto(mgcpsock, data, len, 0, (struct sockaddr *)&gw->defaddr, sizeof(struct sockaddr_in)); if (res != len) { ast_log(LOG_WARNING, "mgcp_xmit returned %d: %s\n", res, strerror(errno)); } return res; } static int resend_response(struct mgcp_subchannel *sub, struct mgcp_response *resp) { struct mgcp_endpoint *p = sub->parent; int res; if (mgcpdebug) { ast_verbose("Retransmitting:\n%s\n to %s:%d\n", resp->buf, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port)); } res = __mgcp_xmit(p->parent, resp->buf, resp->len); if (res > 0) res = 0; return res; } static int send_response(struct mgcp_subchannel *sub, struct mgcp_request *req) { struct mgcp_endpoint *p = sub->parent; int res; if (mgcpdebug) { ast_verbose("Transmitting:\n%s\n to %s:%d\n", req->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port)); } res = __mgcp_xmit(p->parent, req->data, req->len); if (res > 0) res = 0; return res; } /* modified for new transport framework */ static void dump_queue(struct mgcp_gateway *gw, struct mgcp_endpoint *p) { struct mgcp_message *cur, *q = NULL, *w, *prev; ast_mutex_lock(&gw->msgs_lock); prev = NULL, cur = gw->msgs; while (cur) { if (!p || cur->owner_ep == p) { if (prev) prev->next = cur->next; else gw->msgs = cur->next; ast_log(LOG_NOTICE, "Removing message from %s transaction %u\n", gw->name, cur->seqno); w = cur; cur = cur->next; if (q) { w->next = q; } else { w->next = NULL; } q = w; } else { prev = cur, cur=cur->next; } } ast_mutex_unlock(&gw->msgs_lock); while (q) { cur = q; q = q->next; free(cur); } } static void mgcp_queue_frame(struct mgcp_subchannel *sub, struct ast_frame *f) { for(;;) { if (sub->owner) { if (!ast_mutex_trylock(&sub->owner->lock)) { ast_queue_frame(sub->owner, f); ast_mutex_unlock(&sub->owner->lock); break; } else { ast_mutex_unlock(&sub->lock); usleep(1); ast_mutex_lock(&sub->lock); } } else break; } } static void mgcp_queue_hangup(struct mgcp_subchannel *sub) { for(;;) { if (sub->owner) { if (!ast_mutex_trylock(&sub->owner->lock)) { ast_queue_hangup(sub->owner); ast_mutex_unlock(&sub->owner->lock); break; } else { ast_mutex_unlock(&sub->lock); usleep(1); ast_mutex_lock(&sub->lock); } } else break; } } static void mgcp_queue_control(struct mgcp_subchannel *sub, int control) { struct ast_frame f = { AST_FRAME_CONTROL, }; f.subclass = control; return mgcp_queue_frame(sub, &f); } static int retrans_pkt(const void *data) { struct mgcp_gateway *gw = (struct mgcp_gateway *)data; struct mgcp_message *cur, *exq = NULL, *w, *prev; int res = 0; /* find out expired msgs */ ast_mutex_lock(&gw->msgs_lock); prev = NULL, cur = gw->msgs; while (cur) { if (cur->retrans < MAX_RETRANS) { cur->retrans++; if (mgcpdebug) { ast_verbose("Retransmitting #%d transaction %u on [%s]\n", cur->retrans, cur->seqno, gw->name); } __mgcp_xmit(gw, cur->buf, cur->len); prev = cur; cur = cur->next; } else { if (prev) prev->next = cur->next; else gw->msgs = cur->next; ast_log(LOG_WARNING, "Maximum retries exceeded for transaction %u on [%s]\n", cur->seqno, gw->name); w = cur; cur = cur->next; if (exq) { w->next = exq; } else { w->next = NULL; } exq = w; } } if (!gw->msgs) { gw->retransid = -1; res = 0; } else { res = 1; } ast_mutex_unlock(&gw->msgs_lock); while (exq) { cur = exq; /* time-out transaction */ handle_response(cur->owner_ep, cur->owner_sub, 406, cur->seqno, NULL); exq = exq->next; free(cur); } return res; } /* modified for the new transaction mechanism */ static int mgcp_postrequest(struct mgcp_endpoint *p, struct mgcp_subchannel *sub, char *data, int len, unsigned int seqno) { struct mgcp_message *msg = malloc(sizeof(struct mgcp_message) + len); struct mgcp_message *cur; struct mgcp_gateway *gw = ((p && p->parent) ? p->parent : NULL); struct timeval tv; if (!msg) { return -1; } if (!gw) { return -1; } /* SC time(&t); if (gw->messagepending && (gw->lastouttime + 20 < t)) { ast_log(LOG_NOTICE, "Timeout waiting for response to message:%d, lastouttime: %ld, now: %ld. Dumping pending queue\n", gw->msgs ? gw->msgs->seqno : -1, (long) gw->lastouttime, (long) t); dump_queue(sub->parent); } */ msg->owner_sub = sub; msg->owner_ep = p; msg->seqno = seqno; msg->next = NULL; msg->len = len; msg->retrans = 0; memcpy(msg->buf, data, msg->len); ast_mutex_lock(&gw->msgs_lock); cur = gw->msgs; if (cur) { while(cur->next) cur = cur->next; cur->next = msg; } else { gw->msgs = msg; } if (gettimeofday(&tv, NULL) < 0) { /* This shouldn't ever happen, but let's be sure */ ast_log(LOG_NOTICE, "gettimeofday() failed!\n"); } else { msg->expire = tv.tv_sec * 1000 + tv.tv_usec / 1000 + DEFAULT_RETRANS; if (gw->retransid == -1) gw->retransid = ast_sched_add(sched, DEFAULT_RETRANS, retrans_pkt, (void *)gw); } ast_mutex_unlock(&gw->msgs_lock); /* SC if (!gw->messagepending) { gw->messagepending = 1; gw->lastout = seqno; gw->lastouttime = t; */ __mgcp_xmit(gw, msg->buf, msg->len); /* XXX Should schedule retransmission XXX */ /* SC } else ast_log(LOG_DEBUG, "Deferring transmission of transaction %d\n", seqno); */ return 0; } /* modified for new transport */ static int send_request(struct mgcp_endpoint *p, struct mgcp_subchannel *sub, struct mgcp_request *req, unsigned int seqno) { int res = 0; struct mgcp_request **queue, *q, *r, *t; ast_mutex_t *l; ast_log(LOG_DEBUG, "Slow sequence is %d\n", p->slowsequence); if (p->slowsequence) { queue = &p->cmd_queue; l = &p->cmd_queue_lock; ast_mutex_lock(l); } else { switch (req->cmd) { case MGCP_CMD_DLCX: queue = &sub->cx_queue; l = &sub->cx_queue_lock; ast_mutex_lock(l); q = sub->cx_queue; /* delete pending cx cmds */ while (q) { r = q->next; free(q); q = r; } *queue = NULL; break; case MGCP_CMD_CRCX: case MGCP_CMD_MDCX: queue = &sub->cx_queue; l = &sub->cx_queue_lock; ast_mutex_lock(l); break; case MGCP_CMD_RQNT: queue = &p->rqnt_queue; l = &p->rqnt_queue_lock; ast_mutex_lock(l); break; default: queue = &p->cmd_queue; l = &p->cmd_queue_lock; ast_mutex_lock(l); break; } } r = (struct mgcp_request *) malloc (sizeof(struct mgcp_request)); if (!r) { ast_log(LOG_WARNING, "Cannot post MGCP request: insufficient memory\n"); ast_mutex_unlock(l); return -1; } memcpy(r, req, sizeof(struct mgcp_request)); if (!(*queue)) { if (mgcpdebug) { ast_verbose("Posting Request:\n%s to %s:%d\n", req->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port)); } res = mgcp_postrequest(p, sub, req->data, req->len, seqno); } else { if (mgcpdebug) { ast_verbose("Queueing Request:\n%s to %s:%d\n", req->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port)); } } /* XXX find tail. We could also keep tail in the data struct for faster access */ for (t = *queue; t && t->next; t = t->next); r->next = NULL; if (t) t->next = r; else *queue = r; ast_mutex_unlock(l); return res; } static int mgcp_call(struct ast_channel *ast, char *dest, int timeout) { int res; struct mgcp_endpoint *p; struct mgcp_subchannel *sub; char tone[50] = ""; const char *distinctive_ring = NULL; struct varshead *headp; struct ast_var_t *current; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_call(%s)\n", ast->name); } sub = ast->tech_pvt; p = sub->parent; headp = &ast->varshead; AST_LIST_TRAVERSE(headp,current,entries) { /* Check whether there is an ALERT_INFO variable */ if (strcasecmp(ast_var_name(current),"ALERT_INFO") == 0) { distinctive_ring = ast_var_value(current); } } ast_mutex_lock(&sub->lock); switch (p->hookstate) { case MGCP_OFFHOOK: if (!ast_strlen_zero(distinctive_ring)) { snprintf(tone, sizeof(tone), "L/wt%s", distinctive_ring); if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP distinctive callwait %s\n", tone); } } else { snprintf(tone, sizeof(tone), "L/wt"); if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP normal callwait %s\n", tone); } } break; case MGCP_ONHOOK: default: if (!ast_strlen_zero(distinctive_ring)) { snprintf(tone, sizeof(tone), "L/r%s", distinctive_ring); if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP distinctive ring %s\n", tone); } } else { snprintf(tone, sizeof(tone), "L/rg"); if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP default ring\n"); } } break; } if ((ast->_state != AST_STATE_DOWN) && (ast->_state != AST_STATE_RESERVED)) { ast_log(LOG_WARNING, "mgcp_call called on %s, neither down nor reserved\n", ast->name); ast_mutex_unlock(&sub->lock); return -1; } res = 0; sub->outgoing = 1; sub->cxmode = MGCP_CX_RECVONLY; if (p->type == TYPE_LINE) { if (!sub->rtp) { start_rtp(sub); } else { transmit_modify_request(sub); } if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) { /* try to prevent a callwait from disturbing the other connection */ sub->next->cxmode = MGCP_CX_RECVONLY; transmit_modify_request(sub->next); } transmit_notify_request_with_callerid(sub, tone, ast->cid.cid_num, ast->cid.cid_name); ast_setstate(ast, AST_STATE_RINGING); if (sub->next->owner && !ast_strlen_zero(sub->next->cxident) && !ast_strlen_zero(sub->next->callid)) { /* Put the connection back in sendrecv */ sub->next->cxmode = MGCP_CX_SENDRECV; transmit_modify_request(sub->next); } } else { ast_log(LOG_NOTICE, "Don't know how to dial on trunks yet\n"); res = -1; } ast_mutex_unlock(&sub->lock); ast_queue_control(ast, AST_CONTROL_RINGING); return res; } static int mgcp_hangup(struct ast_channel *ast) { struct mgcp_subchannel *sub = ast->tech_pvt; struct mgcp_endpoint *p = sub->parent; if (option_debug) { ast_log(LOG_DEBUG, "mgcp_hangup(%s)\n", ast->name); } if (!ast->tech_pvt) { ast_log(LOG_DEBUG, "Asked to hangup channel not connected\n"); return 0; } if (strcmp(sub->magic, MGCP_SUBCHANNEL_MAGIC)) { ast_log(LOG_DEBUG, "Invalid magic. MGCP subchannel freed up already.\n"); return 0; } ast_mutex_lock(&sub->lock); if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_hangup(%s) on %s@%s\n", ast->name, p->name, p->parent->name); } if ((p->dtmfmode & MGCP_DTMF_INBAND) && p->dsp) { /* check whether other channel is active. */ if (!sub->next->owner) { if (p->dtmfmode & MGCP_DTMF_HYBRID) p->dtmfmode &= ~MGCP_DTMF_INBAND; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_2 "MGCP free dsp on %s@%s\n", p->name, p->parent->name); } ast_dsp_free(p->dsp); p->dsp = NULL; } } sub->owner = NULL; if (!ast_strlen_zero(sub->cxident)) { transmit_connection_del(sub); } sub->cxident[0] = '\0'; if ((sub == p->sub) && sub->next->owner) { if (p->hookstate == MGCP_OFFHOOK) { if (sub->next->owner && ast_bridged_channel(sub->next->owner)) { transmit_notify_request_with_callerid(p->sub, "L/wt", ast_bridged_channel(sub->next->owner)->cid.cid_num, ast_bridged_channel(sub->next->owner)->cid.cid_name); } } else { /* set our other connection as the primary and swith over to it */ p->sub = sub->next; p->sub->cxmode = MGCP_CX_RECVONLY; transmit_modify_request(p->sub); if (sub->next->owner && ast_bridged_channel(sub->next->owner)) { transmit_notify_request_with_callerid(p->sub, "L/rg", ast_bridged_channel(sub->next->owner)->cid.cid_num, ast_bridged_channel(sub->next->owner)->cid.cid_name); } } } else if ((sub == p->sub->next) && p->hookstate == MGCP_OFFHOOK) { transmit_notify_request(sub, "L/v"); } else if (p->hookstate == MGCP_OFFHOOK) { transmit_notify_request(sub, "L/ro"); } else { transmit_notify_request(sub, ""); } ast->tech_pvt = NULL; sub->alreadygone = 0; sub->outgoing = 0; sub->cxmode = MGCP_CX_INACTIVE; sub->callid[0] = '\0'; /* Reset temporary destination */ memset(&sub->tmpdest, 0, sizeof(sub->tmpdest)); if (sub->rtp) { ast_rtp_destroy(sub->rtp); sub->rtp = NULL; } ast_module_unref(ast_module_info->self); if ((p->hookstate == MGCP_ONHOOK) && (!sub->next->rtp)) { p->hidecallerid = 0; if (p->hascallwaiting && !p->callwaiting) { if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Enabling call waiting on %s\n", ast->name); p->callwaiting = -1; } if (has_voicemail(p)) { if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_hangup(%s) on %s@%s set vmwi(+)\n", ast->name, p->name, p->parent->name); } transmit_notify_request(sub, "L/vmwi(+)"); } else { if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_hangup(%s) on %s@%s set vmwi(-)\n", ast->name, p->name, p->parent->name); } transmit_notify_request(sub, "L/vmwi(-)"); } } ast_mutex_unlock(&sub->lock); return 0; } static int mgcp_show_endpoints(int fd, int argc, char *argv[]) { struct mgcp_gateway *g; struct mgcp_endpoint *e; int hasendpoints = 0; if (argc != 3) return RESULT_SHOWUSAGE; ast_mutex_lock(&gatelock); g = gateways; while(g) { e = g->endpoints; ast_cli(fd, "Gateway '%s' at %s (%s)\n", g->name, g->addr.sin_addr.s_addr ? ast_inet_ntoa(g->addr.sin_addr) : ast_inet_ntoa(g->defaddr.sin_addr), g->dynamic ? "Dynamic" : "Static"); while(e) { /* Don't show wilcard endpoint */ if (strcmp(e->name, g->wcardep) !=0) ast_cli(fd, " -- '%s@%s in '%s' is %s\n", e->name, g->name, e->context, e->sub->owner ? "active" : "idle"); hasendpoints = 1; e = e->next; } if (!hasendpoints) { ast_cli(fd, " << No Endpoints Defined >> "); } g = g->next; } ast_mutex_unlock(&gatelock); return RESULT_SUCCESS; } static char show_endpoints_usage[] = "Usage: mgcp show endpoints\n" " Lists all endpoints known to the MGCP (Media Gateway Control Protocol) subsystem.\n"; static char audit_endpoint_usage[] = "Usage: mgcp audit endpoint \n" " Lists the capabilities of an endpoint in the MGCP (Media Gateway Control Protocol) subsystem.\n" " mgcp debug MUST be on to see the results of this command.\n"; static char debug_usage[] = "Usage: mgcp set debug\n" " Enables dumping of MGCP packets for debugging purposes\n"; static char no_debug_usage[] = "Usage: mgcp set debug off\n" " Disables dumping of MGCP packets for debugging purposes\n"; static char mgcp_reload_usage[] = "Usage: mgcp reload\n" " Reloads MGCP configuration from mgcp.conf\n" " Deprecated: please use 'reload chan_mgcp.so' instead.\n"; static int mgcp_audit_endpoint(int fd, int argc, char *argv[]) { struct mgcp_gateway *g; struct mgcp_endpoint *e; int found = 0; char *ename,*gname, *c; if (!mgcpdebug) { return RESULT_SHOWUSAGE; } if (argc != 4) return RESULT_SHOWUSAGE; /* split the name into parts by null */ ename = argv[3]; gname = ename; while (*gname) { if (*gname == '@') { *gname = 0; gname++; break; } gname++; } if (gname[0] == '[') gname++; if ((c = strrchr(gname, ']'))) *c = '\0'; ast_mutex_lock(&gatelock); g = gateways; while(g) { if (!strcasecmp(g->name, gname)) { e = g->endpoints; while(e) { if (!strcasecmp(e->name, ename)) { found = 1; transmit_audit_endpoint(e); break; } e = e->next; } if (found) { break; } } g = g->next; } if (!found) { ast_cli(fd, " << Could not find endpoint >> "); } ast_mutex_unlock(&gatelock); return RESULT_SUCCESS; } static int mgcp_do_debug(int fd, int argc, char *argv[]) { if (argc != 3) return RESULT_SHOWUSAGE; mgcpdebug = 1; ast_cli(fd, "MGCP Debugging Enabled\n"); return RESULT_SUCCESS; } static int mgcp_no_debug(int fd, int argc, char *argv[]) { if (argc != 4) return RESULT_SHOWUSAGE; mgcpdebug = 0; ast_cli(fd, "MGCP Debugging Disabled\n"); return RESULT_SUCCESS; } static struct ast_cli_entry cli_mgcp[] = { { { "mgcp", "audit", "endpoint", NULL }, mgcp_audit_endpoint, "Audit specified MGCP endpoint", audit_endpoint_usage }, { { "mgcp", "show", "endpoints", NULL }, mgcp_show_endpoints, "List defined MGCP endpoints", show_endpoints_usage }, { { "mgcp", "set", "debug", NULL }, mgcp_do_debug, "Enable MGCP debugging", debug_usage }, { { "mgcp", "set", "debug", "off", NULL }, mgcp_no_debug, "Disable MGCP debugging", no_debug_usage }, { { "mgcp", "reload", NULL }, mgcp_reload, "Reload MGCP configuration", mgcp_reload_usage }, }; static int mgcp_answer(struct ast_channel *ast) { int res = 0; struct mgcp_subchannel *sub = ast->tech_pvt; struct mgcp_endpoint *p = sub->parent; ast_mutex_lock(&sub->lock); sub->cxmode = MGCP_CX_SENDRECV; if (!sub->rtp) { start_rtp(sub); } else { transmit_modify_request(sub); } /* verbose level check */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_answer(%s) on %s@%s-%d\n", ast->name, p->name, p->parent->name, sub->id); } if (ast->_state != AST_STATE_UP) { ast_setstate(ast, AST_STATE_UP); if (option_debug) ast_log(LOG_DEBUG, "mgcp_answer(%s)\n", ast->name); transmit_notify_request(sub, ""); transmit_modify_request(sub); } ast_mutex_unlock(&sub->lock); return res; } static struct ast_frame *mgcp_rtp_read(struct mgcp_subchannel *sub) { /* Retrieve audio/etc from channel. Assumes sub->lock is already held. */ struct ast_frame *f; f = ast_rtp_read(sub->rtp); /* Don't send RFC2833 if we're not supposed to */ if (f && (f->frametype == AST_FRAME_DTMF) && !(sub->parent->dtmfmode & MGCP_DTMF_RFC2833)) return &ast_null_frame; if (sub->owner) { /* We already hold the channel lock */ if (f->frametype == AST_FRAME_VOICE) { if (f->subclass != sub->owner->nativeformats) { ast_log(LOG_DEBUG, "Oooh, format changed to %d\n", f->subclass); sub->owner->nativeformats = f->subclass; ast_set_read_format(sub->owner, sub->owner->readformat); ast_set_write_format(sub->owner, sub->owner->writeformat); } /* Courtesy fearnor aka alex@pilosoft.com */ if ((sub->parent->dtmfmode & MGCP_DTMF_INBAND) && (sub->parent->dsp)) { #if 0 ast_log(LOG_NOTICE, "MGCP ast_dsp_process\n"); #endif f = ast_dsp_process(sub->owner, sub->parent->dsp, f); } } } return f; } static struct ast_frame *mgcp_read(struct ast_channel *ast) { struct ast_frame *f; struct mgcp_subchannel *sub = ast->tech_pvt; ast_mutex_lock(&sub->lock); f = mgcp_rtp_read(sub); ast_mutex_unlock(&sub->lock); return f; } static int mgcp_write(struct ast_channel *ast, struct ast_frame *frame) { struct mgcp_subchannel *sub = ast->tech_pvt; int res = 0; if (frame->frametype != AST_FRAME_VOICE) { if (frame->frametype == AST_FRAME_IMAGE) return 0; else { ast_log(LOG_WARNING, "Can't send %d type frames with MGCP write\n", frame->frametype); return 0; } } else { if (!(frame->subclass & ast->nativeformats)) { ast_log(LOG_WARNING, "Asked to transmit frame type %d, while native formats is %d (read/write = %d/%d)\n", frame->subclass, ast->nativeformats, ast->readformat, ast->writeformat); return -1; } } if (sub) { ast_mutex_lock(&sub->lock); if ((sub->parent->sub == sub) || !sub->parent->singlepath) { if (sub->rtp) { res = ast_rtp_write(sub->rtp, frame); } } ast_mutex_unlock(&sub->lock); } return res; } static int mgcp_fixup(struct ast_channel *oldchan, struct ast_channel *newchan) { struct mgcp_subchannel *sub = newchan->tech_pvt; ast_mutex_lock(&sub->lock); ast_log(LOG_NOTICE, "mgcp_fixup(%s, %s)\n", oldchan->name, newchan->name); if (sub->owner != oldchan) { ast_mutex_unlock(&sub->lock); ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, sub->owner); return -1; } sub->owner = newchan; ast_mutex_unlock(&sub->lock); return 0; } static int mgcp_senddigit_begin(struct ast_channel *ast, char digit) { /* Let asterisk play inband indications */ return -1; } static int mgcp_senddigit_end(struct ast_channel *ast, char digit, unsigned int duration) { struct mgcp_subchannel *sub = ast->tech_pvt; char tmp[4]; tmp[0] = 'D'; tmp[1] = '/'; tmp[2] = digit; tmp[3] = '\0'; ast_mutex_lock(&sub->lock); transmit_notify_request(sub, tmp); ast_mutex_unlock(&sub->lock); return -1; /* Return non-zero so that Asterisk will stop the inband indications */ } /*! * \brief mgcp_devicestate: channel callback for device status monitoring * \param data tech/resource name of MGCP device to query * * Callback for device state management in channel subsystem * to obtain device status (up/down) of a specific MGCP endpoint * * \return device status result (from devicestate.h) AST_DEVICE_INVALID (not available) or AST_DEVICE_UNKNOWN (available but unknown state) */ static int mgcp_devicestate(void *data) { struct mgcp_gateway *g; struct mgcp_endpoint *e = NULL; char *tmp, *endpt, *gw; int ret = AST_DEVICE_INVALID; endpt = ast_strdupa(data); if ((tmp = strchr(endpt, '@'))) { *tmp++ = '\0'; gw = tmp; } else goto error; ast_mutex_lock(&gatelock); g = gateways; while (g) { if (strcasecmp(g->name, gw) == 0) { e = g->endpoints; break; } g = g->next; } if (!e) goto error; while (e) { if (strcasecmp(e->name, endpt) == 0) break; e = e->next; } if (!e) goto error; /* * As long as the gateway/endpoint is valid, we'll * assume that the device is available and its state * can be tracked. */ ret = AST_DEVICE_UNKNOWN; error: ast_mutex_unlock(&gatelock); return ret; } static char *control2str(int ind) { switch (ind) { case AST_CONTROL_HANGUP: return "Other end has hungup"; case AST_CONTROL_RING: return "Local ring"; case AST_CONTROL_RINGING: return "Remote end is ringing"; case AST_CONTROL_ANSWER: return "Remote end has answered"; case AST_CONTROL_BUSY: return "Remote end is busy"; case AST_CONTROL_TAKEOFFHOOK: return "Make it go off hook"; case AST_CONTROL_OFFHOOK: return "Line is off hook"; case AST_CONTROL_CONGESTION: return "Congestion (circuits busy)"; case AST_CONTROL_FLASH: return "Flash hook"; case AST_CONTROL_WINK: return "Wink"; case AST_CONTROL_OPTION: return "Set a low-level option"; case AST_CONTROL_RADIO_KEY: return "Key Radio"; case AST_CONTROL_RADIO_UNKEY: return "Un-Key Radio"; } return "UNKNOWN"; } static int mgcp_indicate(struct ast_channel *ast, int ind, const void *data, size_t datalen) { struct mgcp_subchannel *sub = ast->tech_pvt; int res = 0; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP asked to indicate %d '%s' condition on channel %s\n", ind, control2str(ind), ast->name); } ast_mutex_lock(&sub->lock); switch(ind) { case AST_CONTROL_RINGING: #ifdef DLINK_BUGGY_FIRMWARE transmit_notify_request(sub, "rt"); #else transmit_notify_request(sub, "G/rt"); #endif break; case AST_CONTROL_BUSY: transmit_notify_request(sub, "L/bz"); break; case AST_CONTROL_CONGESTION: transmit_notify_request(sub, "G/cg"); break; case AST_CONTROL_HOLD: ast_moh_start(ast, data, NULL); break; case AST_CONTROL_UNHOLD: ast_moh_stop(ast); break; case -1: transmit_notify_request(sub, ""); break; default: ast_log(LOG_WARNING, "Don't know how to indicate condition %d\n", ind); res = -1; } ast_mutex_unlock(&sub->lock); return res; } static struct ast_channel *mgcp_new(struct mgcp_subchannel *sub, int state) { struct ast_channel *tmp; struct mgcp_endpoint *i = sub->parent; int fmt; tmp = ast_channel_alloc(1, state, i->cid_num, i->cid_name, i->accountcode, i->exten, i->context, i->amaflags, "MGCP/%s@%s-%d", i->name, i->parent->name, sub->id); if (tmp) { tmp->tech = &mgcp_tech; tmp->nativeformats = i->capability; if (!tmp->nativeformats) tmp->nativeformats = capability; fmt = ast_best_codec(tmp->nativeformats); ast_string_field_build(tmp, name, "MGCP/%s@%s-%d", i->name, i->parent->name, sub->id); if (sub->rtp) tmp->fds[0] = ast_rtp_fd(sub->rtp); if (i->dtmfmode & (MGCP_DTMF_INBAND | MGCP_DTMF_HYBRID)) { i->dsp = ast_dsp_new(); ast_dsp_set_features(i->dsp,DSP_FEATURE_DTMF_DETECT); /* this is to prevent clipping of dtmf tones during dsp processing */ ast_dsp_digitmode(i->dsp, DSP_DIGITMODE_NOQUELCH); } else { i->dsp = NULL; } if (state == AST_STATE_RING) tmp->rings = 1; tmp->writeformat = fmt; tmp->rawwriteformat = fmt; tmp->readformat = fmt; tmp->rawreadformat = fmt; tmp->tech_pvt = sub; if (!ast_strlen_zero(i->language)) ast_string_field_set(tmp, language, i->language); if (!ast_strlen_zero(i->accountcode)) ast_string_field_set(tmp, accountcode, i->accountcode); if (i->amaflags) tmp->amaflags = i->amaflags; sub->owner = tmp; ast_module_ref(ast_module_info->self); tmp->callgroup = i->callgroup; tmp->pickupgroup = i->pickupgroup; ast_string_field_set(tmp, call_forward, i->call_forward); ast_copy_string(tmp->context, i->context, sizeof(tmp->context)); ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten)); /* Don't use ast_set_callerid() here because it will * generate a needless NewCallerID event */ tmp->cid.cid_ani = ast_strdup(i->cid_num); if (!i->adsi) tmp->adsicpe = AST_ADSI_UNAVAILABLE; tmp->priority = 1; if (sub->rtp) ast_jb_configure(tmp, &global_jbconf); if (state != AST_STATE_DOWN) { if (ast_pbx_start(tmp)) { ast_log(LOG_WARNING, "Unable to start PBX on %s\n", tmp->name); ast_hangup(tmp); tmp = NULL; } } /* verbose level check */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_new(%s) created in state: %s\n", tmp->name, ast_state2str(state)); } } else { ast_log(LOG_WARNING, "Unable to allocate channel structure\n"); } return tmp; } static char* get_sdp_by_line(char* line, char *name, int nameLen) { if (strncasecmp(line, name, nameLen) == 0 && line[nameLen] == '=') { char* r = line + nameLen + 1; while (*r && (*r < 33)) ++r; return r; } return ""; } static char *get_sdp(struct mgcp_request *req, char *name) { int x; int len = strlen(name); char *r; for (x=0; xlines; x++) { r = get_sdp_by_line(req->line[x], name, len); if (r[0] != '\0') return r; } return ""; } static void sdpLineNum_iterator_init(int* iterator) { *iterator = 0; } static char* get_sdp_iterate(int* iterator, struct mgcp_request *req, char *name) { int len = strlen(name); char *r; while (*iterator < req->lines) { r = get_sdp_by_line(req->line[(*iterator)++], name, len); if (r[0] != '\0') return r; } return ""; } static char *__get_header(struct mgcp_request *req, char *name, int *start) { int x; int len = strlen(name); char *r; for (x=*start;xheaders;x++) { if (!strncasecmp(req->header[x], name, len) && (req->header[x][len] == ':')) { r = req->header[x] + len + 1; while(*r && (*r < 33)) r++; *start = x+1; return r; } } /* Don't return NULL, so get_header is always a valid pointer */ return ""; } static char *get_header(struct mgcp_request *req, char *name) { int start = 0; return __get_header(req, name, &start); } /*! \brief get_csv: (SC:) get comma separated value */ static char *get_csv(char *c, int *len, char **next) { char *s; *next = NULL, *len = 0; if (!c) return NULL; while (*c && (*c < 33 || *c == ',')) c++; s = c; while (*c && (*c >= 33 && *c != ',')) c++, (*len)++; *next = c; if (*len == 0) s = NULL, *next = NULL; return s; } static struct mgcp_subchannel *find_subchannel_and_lock(char *name, int msgid, struct sockaddr_in *sin) { struct mgcp_endpoint *p = NULL; struct mgcp_subchannel *sub = NULL; struct mgcp_gateway *g; char tmp[256] = ""; char *at = NULL, *c; int found = 0; if (name) { ast_copy_string(tmp, name, sizeof(tmp)); at = strchr(tmp, '@'); if (!at) { ast_log(LOG_NOTICE, "Endpoint '%s' has no at sign!\n", name); return NULL; } *at++ = '\0'; } ast_mutex_lock(&gatelock); if (at && (at[0] == '[')) { at++; c = strrchr(at, ']'); if (c) *c = '\0'; } g = gateways; while(g) { if ((!name || !strcasecmp(g->name, at)) && (sin || g->addr.sin_addr.s_addr || g->defaddr.sin_addr.s_addr)) { /* Found the gateway. If it's dynamic, save it's address -- now for the endpoint */ if (sin && g->dynamic && name) { if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) || (g->addr.sin_port != sin->sin_port)) { memcpy(&g->addr, sin, sizeof(g->addr)); if (ast_ouraddrfor(&g->addr.sin_addr, &g->ourip)) memcpy(&g->ourip, &__ourip, sizeof(g->ourip)); if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Registered MGCP gateway '%s' at %s port %d\n", g->name, ast_inet_ntoa(g->addr.sin_addr), ntohs(g->addr.sin_port)); } } /* not dynamic, check if the name matches */ else if (name) { if (strcasecmp(g->name, at)) { g = g->next; continue; } } /* not dynamic, no name, check if the addr matches */ else if (!name && sin) { if ((g->addr.sin_addr.s_addr != sin->sin_addr.s_addr) || (g->addr.sin_port != sin->sin_port)) { g = g->next; continue; } } else { g = g->next; continue; } /* SC */ p = g->endpoints; while(p) { if (option_debug) ast_log(LOG_DEBUG, "Searching on %s@%s for subchannel\n", p->name, g->name); if (msgid) { #if 0 /* new transport mech */ sub = p->sub; do { if (option_debug) ast_log(LOG_DEBUG, "Searching on %s@%s-%d for subchannel with lastout: %d\n", p->name, g->name, sub->id, msgid); if (sub->lastout == msgid) { if (option_debug) ast_log(LOG_DEBUG, "Found subchannel sub%d to handle request %d sub->lastout: %d\n", sub->id, msgid, sub->lastout); found = 1; break; } sub = sub->next; } while (sub != p->sub); if (found) { break; } #endif /* SC */ sub = p->sub; found = 1; /* SC */ break; } else if (name && !strcasecmp(p->name, tmp)) { ast_log(LOG_DEBUG, "Coundn't determine subchannel, assuming current master %s@%s-%d\n", p->name, g->name, p->sub->id); sub = p->sub; found = 1; break; } p = p->next; } if (sub && found) { ast_mutex_lock(&sub->lock); break; } } g = g->next; } ast_mutex_unlock(&gatelock); if (!sub) { if (name) { if (g) ast_log(LOG_NOTICE, "Endpoint '%s' not found on gateway '%s'\n", tmp, at); else ast_log(LOG_NOTICE, "Gateway '%s' (and thus its endpoint '%s') does not exist\n", at, tmp); } } return sub; } static void parse(struct mgcp_request *req) { /* Divide fields by NULL's */ char *c; int f = 0; c = req->data; /* First header starts immediately */ req->header[f] = c; while(*c) { if (*c == '\n') { /* We've got a new header */ *c = 0; #if 0 printf("Header: %s (%d)\n", req->header[f], strlen(req->header[f])); #endif if (ast_strlen_zero(req->header[f])) { /* Line by itself means we're now in content */ c++; break; } if (f >= MGCP_MAX_HEADERS - 1) { ast_log(LOG_WARNING, "Too many MGCP headers...\n"); } else f++; req->header[f] = c + 1; } else if (*c == '\r') { /* Ignore but eliminate \r's */ *c = 0; } c++; } /* Check for last header */ if (!ast_strlen_zero(req->header[f])) f++; req->headers = f; /* Now we process any mime content */ f = 0; req->line[f] = c; while(*c) { if (*c == '\n') { /* We've got a new line */ *c = 0; #if 0 printf("Line: %s (%d)\n", req->line[f], strlen(req->line[f])); #endif if (f >= MGCP_MAX_LINES - 1) { ast_log(LOG_WARNING, "Too many SDP lines...\n"); } else f++; req->line[f] = c + 1; } else if (*c == '\r') { /* Ignore and eliminate \r's */ *c = 0; } c++; } /* Check for last line */ if (!ast_strlen_zero(req->line[f])) f++; req->lines = f; /* Parse up the initial header */ c = req->header[0]; while(*c && *c < 33) c++; /* First the verb */ req->verb = c; while(*c && (*c > 32)) c++; if (*c) { *c = '\0'; c++; while(*c && (*c < 33)) c++; req->identifier = c; while(*c && (*c > 32)) c++; if (*c) { *c = '\0'; c++; while(*c && (*c < 33)) c++; req->endpoint = c; while(*c && (*c > 32)) c++; if (*c) { *c = '\0'; c++; while(*c && (*c < 33)) c++; req->version = c; while(*c && (*c > 32)) c++; while(*c && (*c < 33)) c++; while(*c && (*c > 32)) c++; *c = '\0'; } } } if (mgcpdebug) { ast_verbose("Verb: '%s', Identifier: '%s', Endpoint: '%s', Version: '%s'\n", req->verb, req->identifier, req->endpoint, req->version); ast_verbose("%d headers, %d lines\n", req->headers, req->lines); } if (*c) ast_log(LOG_WARNING, "Odd content, extra stuff left over ('%s')\n", c); } static int process_sdp(struct mgcp_subchannel *sub, struct mgcp_request *req) { char *m; char *c; char *a; char host[258]; int len; int portno; int peercapability, peerNonCodecCapability; struct sockaddr_in sin; char *codecs; struct ast_hostent ahp; struct hostent *hp; int codec, codec_count=0; int iterator; struct mgcp_endpoint *p = sub->parent; /* Get codec and RTP info from SDP */ m = get_sdp(req, "m"); c = get_sdp(req, "c"); if (ast_strlen_zero(m) || ast_strlen_zero(c)) { ast_log(LOG_WARNING, "Insufficient information for SDP (m = '%s', c = '%s')\n", m, c); return -1; } if (sscanf(c, "IN IP4 %256s", host) != 1) { ast_log(LOG_WARNING, "Invalid host in c= line, '%s'\n", c); return -1; } /* XXX This could block for a long time, and block the main thread! XXX */ hp = ast_gethostbyname(host, &ahp); if (!hp) { ast_log(LOG_WARNING, "Unable to lookup host in c= line, '%s'\n", c); return -1; } if (sscanf(m, "audio %d RTP/AVP %n", &portno, &len) != 1) { ast_log(LOG_WARNING, "Unable to determine port number for RTP in '%s'\n", m); return -1; } sin.sin_family = AF_INET; memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr)); sin.sin_port = htons(portno); ast_rtp_set_peer(sub->rtp, &sin); #if 0 printf("Peer RTP is at port %s:%d\n", ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port)); #endif /* Scan through the RTP payload types specified in a "m=" line: */ ast_rtp_pt_clear(sub->rtp); codecs = ast_strdupa(m + len); while (!ast_strlen_zero(codecs)) { if (sscanf(codecs, "%d%n", &codec, &len) != 1) { if (codec_count) break; ast_log(LOG_WARNING, "Error in codec string '%s' at '%s'\n", m, codecs); return -1; } ast_rtp_set_m_type(sub->rtp, codec); codec_count++; codecs += len; } /* Next, scan through each "a=rtpmap:" line, noting each */ /* specified RTP payload type (with corresponding MIME subtype): */ sdpLineNum_iterator_init(&iterator); while ((a = get_sdp_iterate(&iterator, req, "a"))[0] != '\0') { char* mimeSubtype = ast_strdupa(a); /* ensures we have enough space */ if (sscanf(a, "rtpmap: %u %[^/]/", &codec, mimeSubtype) != 2) continue; /* Note: should really look at the 'freq' and '#chans' params too */ ast_rtp_set_rtpmap_type(sub->rtp, codec, "audio", mimeSubtype, 0); } /* Now gather all of the codecs that were asked for: */ ast_rtp_get_current_formats(sub->rtp, &peercapability, &peerNonCodecCapability); p->capability = capability & peercapability; if (mgcpdebug) { ast_verbose("Capabilities: us - %d, them - %d, combined - %d\n", capability, peercapability, p->capability); ast_verbose("Non-codec capabilities: us - %d, them - %d, combined - %d\n", nonCodecCapability, peerNonCodecCapability, p->nonCodecCapability); } if (!p->capability) { ast_log(LOG_WARNING, "No compatible codecs!\n"); return -1; } return 0; } static int add_header(struct mgcp_request *req, char *var, char *value) { if (req->len >= sizeof(req->data) - 4) { ast_log(LOG_WARNING, "Out of space, can't add anymore\n"); return -1; } if (req->lines) { ast_log(LOG_WARNING, "Can't add more headers when lines have been added\n"); return -1; } req->header[req->headers] = req->data + req->len; snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s: %s\r\n", var, value); req->len += strlen(req->header[req->headers]); if (req->headers < MGCP_MAX_HEADERS) req->headers++; else { ast_log(LOG_WARNING, "Out of header space\n"); return -1; } return 0; } static int add_line(struct mgcp_request *req, char *line) { if (req->len >= sizeof(req->data) - 4) { ast_log(LOG_WARNING, "Out of space, can't add anymore\n"); return -1; } if (!req->lines) { /* Add extra empty return */ snprintf(req->data + req->len, sizeof(req->data) - req->len, "\r\n"); req->len += strlen(req->data + req->len); } req->line[req->lines] = req->data + req->len; snprintf(req->line[req->lines], sizeof(req->data) - req->len, "%s", line); req->len += strlen(req->line[req->lines]); if (req->lines < MGCP_MAX_LINES) req->lines++; else { ast_log(LOG_WARNING, "Out of line space\n"); return -1; } return 0; } static int init_resp(struct mgcp_request *req, char *resp, struct mgcp_request *orig, char *resprest) { /* Initialize a response */ if (req->headers || req->len) { ast_log(LOG_WARNING, "Request already initialized?!?\n"); return -1; } req->header[req->headers] = req->data + req->len; snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %s %s\r\n", resp, orig->identifier, resprest); req->len += strlen(req->header[req->headers]); if (req->headers < MGCP_MAX_HEADERS) req->headers++; else ast_log(LOG_WARNING, "Out of header space\n"); return 0; } static int init_req(struct mgcp_endpoint *p, struct mgcp_request *req, char *verb) { /* Initialize a response */ if (req->headers || req->len) { ast_log(LOG_WARNING, "Request already initialized?!?\n"); return -1; } req->header[req->headers] = req->data + req->len; /* check if we need brackets around the gw name */ if (p->parent->isnamedottedip) snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %d %s@[%s] MGCP 1.0\r\n", verb, oseq, p->name, p->parent->name); else snprintf(req->header[req->headers], sizeof(req->data) - req->len, "%s %d %s@%s MGCP 1.0\r\n", verb, oseq, p->name, p->parent->name); req->len += strlen(req->header[req->headers]); if (req->headers < MGCP_MAX_HEADERS) req->headers++; else ast_log(LOG_WARNING, "Out of header space\n"); return 0; } static int respprep(struct mgcp_request *resp, struct mgcp_endpoint *p, char *msg, struct mgcp_request *req, char *msgrest) { memset(resp, 0, sizeof(*resp)); init_resp(resp, msg, req, msgrest); return 0; } static int reqprep(struct mgcp_request *req, struct mgcp_endpoint *p, char *verb) { memset(req, 0, sizeof(struct mgcp_request)); oseq++; if (oseq > 999999999) oseq = 1; init_req(p, req, verb); return 0; } static int transmit_response(struct mgcp_subchannel *sub, char *msg, struct mgcp_request *req, char *msgrest) { struct mgcp_request resp; struct mgcp_endpoint *p = sub->parent; struct mgcp_response *mgr; respprep(&resp, p, msg, req, msgrest); mgr = malloc(sizeof(struct mgcp_response) + resp.len + 1); if (mgr) { /* Store MGCP response in case we have to retransmit */ memset(mgr, 0, sizeof(struct mgcp_response)); sscanf(req->identifier, "%d", &mgr->seqno); time(&mgr->whensent); mgr->len = resp.len; memcpy(mgr->buf, resp.data, resp.len); mgr->buf[resp.len] = '\0'; mgr->next = p->parent->responses; p->parent->responses = mgr; } return send_response(sub, &resp); } static int add_sdp(struct mgcp_request *resp, struct mgcp_subchannel *sub, struct ast_rtp *rtp) { int len; int codec; char costr[80]; struct sockaddr_in sin; char v[256]; char s[256]; char o[256]; char c[256]; char t[256]; char m[256] = ""; char a[1024] = ""; int x; struct sockaddr_in dest; struct mgcp_endpoint *p = sub->parent; /* XXX We break with the "recommendation" and send our IP, in order that our peer doesn't have to ast_gethostbyname() us XXX */ len = 0; if (!sub->rtp) { ast_log(LOG_WARNING, "No way to add SDP without an RTP structure\n"); return -1; } ast_rtp_get_us(sub->rtp, &sin); if (rtp) { ast_rtp_get_peer(rtp, &dest); } else { if (sub->tmpdest.sin_addr.s_addr) { dest.sin_addr = sub->tmpdest.sin_addr; dest.sin_port = sub->tmpdest.sin_port; /* Reset temporary destination */ memset(&sub->tmpdest, 0, sizeof(sub->tmpdest)); } else { dest.sin_addr = p->parent->ourip; dest.sin_port = sin.sin_port; } } if (mgcpdebug) { ast_verbose("We're at %s port %d\n", ast_inet_ntoa(p->parent->ourip), ntohs(sin.sin_port)); } snprintf(v, sizeof(v), "v=0\r\n"); snprintf(o, sizeof(o), "o=root %d %d IN IP4 %s\r\n", (int)getpid(), (int)getpid(), ast_inet_ntoa(dest.sin_addr)); snprintf(s, sizeof(s), "s=session\r\n"); snprintf(c, sizeof(c), "c=IN IP4 %s\r\n", ast_inet_ntoa(dest.sin_addr)); snprintf(t, sizeof(t), "t=0 0\r\n"); snprintf(m, sizeof(m), "m=audio %d RTP/AVP", ntohs(dest.sin_port)); for (x = 1; x <= AST_FORMAT_MAX_AUDIO; x <<= 1) { if (p->capability & x) { if (mgcpdebug) { ast_verbose("Answering with capability %d\n", x); } codec = ast_rtp_lookup_code(sub->rtp, 1, x); if (codec > -1) { snprintf(costr, sizeof(costr), " %d", codec); strncat(m, costr, sizeof(m) - strlen(m) - 1); snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype(1, x, 0)); strncat(a, costr, sizeof(a) - strlen(a) - 1); } } } for (x = 1; x <= AST_RTP_MAX; x <<= 1) { if (p->nonCodecCapability & x) { if (mgcpdebug) { ast_verbose("Answering with non-codec capability %d\n", x); } codec = ast_rtp_lookup_code(sub->rtp, 0, x); if (codec > -1) { snprintf(costr, sizeof(costr), " %d", codec); strncat(m, costr, sizeof(m) - strlen(m) - 1); snprintf(costr, sizeof(costr), "a=rtpmap:%d %s/8000\r\n", codec, ast_rtp_lookup_mime_subtype(0, x, 0)); strncat(a, costr, sizeof(a) - strlen(a) - 1); if (x == AST_RTP_DTMF) { /* Indicate we support DTMF... Not sure about 16, but MSN supports it so dang it, we will too... */ snprintf(costr, sizeof costr, "a=fmtp:%d 0-16\r\n", codec); strncat(a, costr, sizeof(a) - strlen(a) - 1); } } } } strncat(m, "\r\n", sizeof(m) - strlen(m) - 1); len = strlen(v) + strlen(s) + strlen(o) + strlen(c) + strlen(t) + strlen(m) + strlen(a); snprintf(costr, sizeof(costr), "%d", len); add_line(resp, v); add_line(resp, o); add_line(resp, s); add_line(resp, c); add_line(resp, t); add_line(resp, m); add_line(resp, a); return 0; } static int transmit_modify_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp *rtp, int codecs) { struct mgcp_request resp; char local[256]; char tmp[80]; int x; int capability; struct mgcp_endpoint *p = sub->parent; capability = p->capability; if (codecs) capability = codecs; if (ast_strlen_zero(sub->cxident) && rtp) { /* We don't have a CXident yet, store the destination and wait a bit */ ast_rtp_get_peer(rtp, &sub->tmpdest); return 0; } snprintf(local, sizeof(local), "p:20"); for (x=1;x<= AST_FORMAT_MAX_AUDIO; x <<= 1) { if (p->capability & x) { snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype(1, x, 0)); strncat(local, tmp, sizeof(local) - strlen(local) - 1); } } reqprep(&resp, p, "MDCX"); add_header(&resp, "C", sub->callid); add_header(&resp, "L", local); add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]); /* X header should not be sent. kept for compatibility */ add_header(&resp, "X", sub->txident); add_header(&resp, "I", sub->cxident); /*add_header(&resp, "S", "");*/ add_sdp(&resp, sub, rtp); /* fill in new fields */ resp.cmd = MGCP_CMD_MDCX; resp.trid = oseq; return send_request(p, sub, &resp, oseq); /* SC */ } static int transmit_connect_with_sdp(struct mgcp_subchannel *sub, struct ast_rtp *rtp) { struct mgcp_request resp; char local[256]; char tmp[80]; int x; struct mgcp_endpoint *p = sub->parent; snprintf(local, sizeof(local), "p:20"); for (x=1;x<= AST_FORMAT_MAX_AUDIO; x <<= 1) { if (p->capability & x) { snprintf(tmp, sizeof(tmp), ", a:%s", ast_rtp_lookup_mime_subtype(1, x, 0)); strncat(local, tmp, sizeof(local) - strlen(local) - 1); } } if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "Creating connection for %s@%s-%d in cxmode: %s callid: %s\n", p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid); } reqprep(&resp, p, "CRCX"); add_header(&resp, "C", sub->callid); add_header(&resp, "L", local); add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]); /* X header should not be sent. kept for compatibility */ add_header(&resp, "X", sub->txident); /*add_header(&resp, "S", "");*/ add_sdp(&resp, sub, rtp); /* fill in new fields */ resp.cmd = MGCP_CMD_CRCX; resp.trid = oseq; return send_request(p, sub, &resp, oseq); /* SC */ } static int transmit_notify_request(struct mgcp_subchannel *sub, char *tone) { struct mgcp_request resp; struct mgcp_endpoint *p = sub->parent; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP Asked to indicate tone: %s on %s@%s-%d in cxmode: %s\n", tone, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]); } ast_copy_string(p->curtone, tone, sizeof(p->curtone)); reqprep(&resp, p, "RQNT"); add_header(&resp, "X", p->rqnt_ident); /* SC */ switch (p->hookstate) { case MGCP_ONHOOK: add_header(&resp, "R", "L/hd(N)"); break; case MGCP_OFFHOOK: add_header(&resp, "R", (sub->rtp && (p->dtmfmode & MGCP_DTMF_INBAND)) ? "L/hu(N),L/hf(N)" : "L/hu(N),L/hf(N),D/[0-9#*](N)"); break; } if (!ast_strlen_zero(tone)) { add_header(&resp, "S", tone); } /* fill in new fields */ resp.cmd = MGCP_CMD_RQNT; resp.trid = oseq; return send_request(p, NULL, &resp, oseq); /* SC */ } static int transmit_notify_request_with_callerid(struct mgcp_subchannel *sub, char *tone, char *callernum, char *callername) { struct mgcp_request resp; char tone2[256]; char *l, *n; time_t t; struct tm tm; struct mgcp_endpoint *p = sub->parent; time(&t); ast_localtime(&t, &tm, NULL); n = callername; l = callernum; if (!n) n = ""; if (!l) l = ""; /* Keep track of last callerid for blacklist and callreturn */ ast_copy_string(p->lastcallerid, l, sizeof(p->lastcallerid)); snprintf(tone2, sizeof(tone2), "%s,L/ci(%02d/%02d/%02d/%02d,%s,%s)", tone, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, l, n); ast_copy_string(p->curtone, tone, sizeof(p->curtone)); reqprep(&resp, p, "RQNT"); add_header(&resp, "X", p->rqnt_ident); /* SC */ switch (p->hookstate) { case MGCP_ONHOOK: add_header(&resp, "R", "L/hd(N)"); break; case MGCP_OFFHOOK: add_header(&resp, "R", (sub->rtp && (p->dtmfmode & MGCP_DTMF_INBAND)) ? "L/hu(N),L/hf(N)" : "L/hu(N),L/hf(N),D/[0-9#*](N)"); break; } if (!ast_strlen_zero(tone2)) { add_header(&resp, "S", tone2); } if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "MGCP Asked to indicate tone: %s on %s@%s-%d in cxmode: %s\n", tone2, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode]); } /* fill in new fields */ resp.cmd = MGCP_CMD_RQNT; resp.trid = oseq; return send_request(p, NULL, &resp, oseq); /* SC */ } static int transmit_modify_request(struct mgcp_subchannel *sub) { struct mgcp_request resp; struct mgcp_endpoint *p = sub->parent; if (ast_strlen_zero(sub->cxident)) { /* We don't have a CXident yet, store the destination and wait a bit */ return 0; } if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "Modified %s@%s-%d with new mode: %s on callid: %s\n", p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid); } reqprep(&resp, p, "MDCX"); add_header(&resp, "C", sub->callid); add_header(&resp, "M", mgcp_cxmodes[sub->cxmode]); /* X header should not be sent. kept for compatibility */ add_header(&resp, "X", sub->txident); add_header(&resp, "I", sub->cxident); switch (sub->parent->hookstate) { case MGCP_ONHOOK: add_header(&resp, "R", "L/hd(N)"); break; case MGCP_OFFHOOK: add_header(&resp, "R", (sub->rtp && (p->dtmfmode & MGCP_DTMF_INBAND)) ? "L/hu(N), L/hf(N)" : "L/hu(N),L/hf(N),D/[0-9#*](N)"); break; } /* fill in new fields */ resp.cmd = MGCP_CMD_MDCX; resp.trid = oseq; return send_request(p, sub, &resp, oseq); /* SC */ } static int transmit_audit_endpoint(struct mgcp_endpoint *p) { struct mgcp_request resp; reqprep(&resp, p, "AUEP"); /* removed unknown param VS */ /*add_header(&resp, "F", "A,R,D,S,X,N,I,T,O,ES,E,MD,M");*/ add_header(&resp, "F", "A"); /* fill in new fields */ resp.cmd = MGCP_CMD_AUEP; resp.trid = oseq; return send_request(p, NULL, &resp, oseq); /* SC */ } static int transmit_connection_del(struct mgcp_subchannel *sub) { struct mgcp_endpoint *p = sub->parent; struct mgcp_request resp; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "Delete connection %s %s@%s-%d with new mode: %s on callid: %s\n", sub->cxident, p->name, p->parent->name, sub->id, mgcp_cxmodes[sub->cxmode], sub->callid); } reqprep(&resp, p, "DLCX"); /* check if call id is avail */ if (sub->callid[0]) add_header(&resp, "C", sub->callid); /* X header should not be sent. kept for compatibility */ add_header(&resp, "X", sub->txident); /* check if cxident is avail */ if (sub->cxident[0]) add_header(&resp, "I", sub->cxident); /* fill in new fields */ resp.cmd = MGCP_CMD_DLCX; resp.trid = oseq; return send_request(p, sub, &resp, oseq); /* SC */ } static int transmit_connection_del_w_params(struct mgcp_endpoint *p, char *callid, char *cxident) { struct mgcp_request resp; if (mgcpdebug) { ast_verbose(VERBOSE_PREFIX_3 "Delete connection %s %s@%s on callid: %s\n", cxident ? cxident : "", p->name, p->parent->name, callid ? callid : ""); } reqprep(&resp, p, "DLCX"); /* check if call id is avail */ if (callid && *callid) add_header(&resp, "C", callid); /* check if cxident is avail */ if (cxident && *cxident) add_header(&resp, "I", cxident); /* fill in new fields */ resp.cmd = MGCP_CMD_DLCX; resp.trid = oseq; return send_request(p, p->sub, &resp, oseq); } /*! \brief dump_cmd_queues: (SC:) cleanup pending commands */ static void dump_cmd_queues(struct mgcp_endpoint *p, struct mgcp_subchannel *sub) { struct mgcp_request *t, *q; if (p) { ast_mutex_lock(&p->rqnt_queue_lock); for (q = p->rqnt_queue; q; t = q->next, free(q), q=t); p->rqnt_queue = NULL; ast_mutex_unlock(&p->rqnt_queue_lock); ast_mutex_lock(&p->cmd_queue_lock); for (q = p->cmd_queue; q; t = q->next, free(q), q=t); p->cmd_queue = NULL; ast_mutex_unlock(&p->cmd_queue_lock); ast_mutex_lock(&p->sub->cx_queue_lock); for (q = p->sub->cx_queue; q; t = q->next, free(q), q=t); p->sub->cx_queue = NULL; ast_mutex_unlock(&p->sub->cx_queue_lock); ast_mutex_lock(&p->sub->next->cx_queue_lock); for (q = p->sub->next->cx_queue; q; t = q->next, free(q), q=t); p->sub->next->cx_queue = NULL; ast_mutex_unlock(&p->sub->next->cx_queue_lock); } else if (sub) { ast_mutex_lock(&sub->cx_queue_lock); for (q = sub->cx_queue; q; t = q->next, free(q), q=t); sub->cx_queue = NULL; ast_mutex_unlock(&sub->cx_queue_lock); } } /*! \brief find_command: (SC:) remove command transaction from queue */ static struct mgcp_request *find_command(struct mgcp_endpoint *p, struct mgcp_subchannel *sub, struct mgcp_request **queue, ast_mutex_t *l, int ident) { struct mgcp_request *prev, *req; ast_mutex_lock(l); for (prev = NULL, req = *queue; req; prev = req, req = req->next) { if (req->trid == ident) { /* remove from queue */ if (!prev) *queue = req->next; else prev->next = req->next; /* send next pending command */ if (*queue) { if (mgcpdebug) { ast_verbose("Posting Queued Request:\n%s to %s:%d\n", (*queue)->data, ast_inet_ntoa(p->parent->addr.sin_addr), ntohs(p->parent->addr.sin_port)); } mgcp_postrequest(p, sub, (*queue)->data, (*queue)->len, (*queue)->trid); } break; } } ast_mutex_unlock(l); return req; } /* modified for new transport mechanism */ static void handle_response(struct mgcp_endpoint *p, struct mgcp_subchannel *sub, int result, unsigned int ident, struct mgcp_request *resp) { char *c; struct mgcp_request *req; struct mgcp_gateway *gw = p->parent; if (result < 200) { /* provisional response */ return; } if (p->slowsequence) req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident); else if (sub) req = find_command(p, sub, &sub->cx_queue, &sub->cx_queue_lock, ident); else if (!(req = find_command(p, sub, &p->rqnt_queue, &p->rqnt_queue_lock, ident))) req = find_command(p, sub, &p->cmd_queue, &p->cmd_queue_lock, ident); if (!req) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "No command found on [%s] for transaction %d. Ignoring...\n", gw->name, ident); } return; } if (p && (result >= 400) && (result <= 599)) { switch (result) { case 401: p->hookstate = MGCP_OFFHOOK; break; case 402: p->hookstate = MGCP_ONHOOK; break; case 406: ast_log(LOG_NOTICE, "Transaction %d timed out\n", ident); break; case 407: ast_log(LOG_NOTICE, "Transaction %d aborted\n", ident); break; } if (sub) { if (sub->owner) { ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n", result, p->name, p->parent->name, sub ? sub->id:-1); mgcp_queue_hangup(sub); } } else { if (p->sub->next->owner) { ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n", result, p->name, p->parent->name, sub ? sub->id:-1); mgcp_queue_hangup(p->sub); } if (p->sub->owner) { ast_log(LOG_NOTICE, "Terminating on result %d from %s@%s-%d\n", result, p->name, p->parent->name, sub ? sub->id:-1); mgcp_queue_hangup(p->sub); } dump_cmd_queues(p, NULL); } } if (resp) { if (req->cmd == MGCP_CMD_CRCX) { if ((c = get_header(resp, "I"))) { if (!ast_strlen_zero(c) && sub) { /* if we are hanging up do not process this conn. */ if (sub->owner) { if (!ast_strlen_zero(sub->cxident)) { if (strcasecmp(c, sub->cxident)) { ast_log(LOG_WARNING, "Subchannel already has a cxident. sub->cxident: %s requested %s\n", sub->cxident, c); } } ast_copy_string(sub->cxident, c, sizeof(sub->cxident)); if (sub->tmpdest.sin_addr.s_addr) { transmit_modify_with_sdp(sub, NULL, 0); } } else { /* XXX delete this one callid and conn id may already be lost. so the following del conn may have a side effect of cleaning up the next subchannel */ transmit_connection_del(sub); } } } } if (req->cmd == MGCP_CMD_AUEP) { /* check stale connection ids */ if ((c = get_header(resp, "I"))) { char *v, *n; int len; while ((v = get_csv(c, &len, &n))) { if (len) { if (strncasecmp(v, p->sub->cxident, len) && strncasecmp(v, p->sub->next->cxident, len)) { /* connection id not found. delete it */ char cxident[80] = ""; if (len > (sizeof(cxident) - 1)) len = sizeof(cxident) - 1; ast_copy_string(cxident, v, len); if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Non existing connection id %s on %s@%s \n", cxident, p->name, gw->name); } transmit_connection_del_w_params(p, NULL, cxident); } } c = n; } } /* Try to determine the hookstate returned from an audit endpoint command */ if ((c = get_header(resp, "ES"))) { if (!ast_strlen_zero(c)) { if (strstr(c, "hu")) { if (p->hookstate != MGCP_ONHOOK) { /* XXX cleanup if we think we are offhook XXX */ if ((p->sub->owner || p->sub->next->owner ) && p->hookstate == MGCP_OFFHOOK) mgcp_queue_hangup(sub); p->hookstate = MGCP_ONHOOK; /* update the requested events according to the new hookstate */ transmit_notify_request(p->sub, ""); /* verbose level check */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Setting hookstate of %s@%s to ONHOOK\n", p->name, gw->name); } } } else if (strstr(c, "hd")) { if (p->hookstate != MGCP_OFFHOOK) { p->hookstate = MGCP_OFFHOOK; /* update the requested events according to the new hookstate */ transmit_notify_request(p->sub, ""); /* verbose level check */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Setting hookstate of %s@%s to OFFHOOK\n", p->name, gw->name); } } } } } } if (resp && resp->lines) { /* do not process sdp if we are hanging up. this may be a late response */ if (sub && sub->owner) { if (!sub->rtp) start_rtp(sub); if (sub->rtp) process_sdp(sub, resp); } } } free(req); } static void start_rtp(struct mgcp_subchannel *sub) { ast_mutex_lock(&sub->lock); /* check again to be on the safe side */ if (sub->rtp) { ast_rtp_destroy(sub->rtp); sub->rtp = NULL; } /* Allocate the RTP now */ sub->rtp = ast_rtp_new_with_bindaddr(sched, io, 1, 0, bindaddr.sin_addr); if (sub->rtp && sub->owner) sub->owner->fds[0] = ast_rtp_fd(sub->rtp); if (sub->rtp) ast_rtp_setnat(sub->rtp, sub->nat); #if 0 ast_rtp_set_callback(p->rtp, rtpready); ast_rtp_set_data(p->rtp, p); #endif /* Make a call*ID */ snprintf(sub->callid, sizeof(sub->callid), "%08lx%s", ast_random(), sub->txident); /* Transmit the connection create */ transmit_connect_with_sdp(sub, NULL); ast_mutex_unlock(&sub->lock); } static void *mgcp_ss(void *data) { struct ast_channel *chan = data; struct mgcp_subchannel *sub = chan->tech_pvt; struct mgcp_endpoint *p = sub->parent; /* char exten[AST_MAX_EXTENSION] = ""; */ int len = 0; int timeout = firstdigittimeout; int res= 0; int getforward = 0; int loop_pause = 100; len = strlen(p->dtmf_buf); while(len < AST_MAX_EXTENSION-1) { res = 1; /* Assume that we will get a digit */ while (strlen(p->dtmf_buf) == len){ ast_safe_sleep(chan, loop_pause); timeout -= loop_pause; if ( (timeout -= loop_pause) <= 0){ res = 0; break; } res = 1; } timeout = 0; len = strlen(p->dtmf_buf); if (!ast_ignore_pattern(chan->context, p->dtmf_buf)) { /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/ ast_indicate(chan, -1); } else { /* XXX Redundant? We should already be playing dialtone */ /*tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALTONE);*/ transmit_notify_request(sub, "L/dl"); } if (ast_exists_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) { if (!res || !ast_matchmore_extension(chan, chan->context, p->dtmf_buf, 1, p->cid_num)) { if (getforward) { /* Record this as the forwarding extension */ ast_copy_string(p->call_forward, p->dtmf_buf, sizeof(p->call_forward)); if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Setting call forward to '%s' on channel %s\n", p->call_forward, chan->name); } /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); if (res) break; usleep(500000); /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/ ast_indicate(chan, -1); sleep(1); memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALTONE);*/ transmit_notify_request(sub, "L/dl"); len = 0; getforward = 0; } else { /*res = tone_zone_play_tone(p->subs[index].zfd, -1);*/ ast_indicate(chan, -1); ast_copy_string(chan->exten, p->dtmf_buf, sizeof(chan->exten)); memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); ast_set_callerid(chan, p->hidecallerid ? "" : p->cid_num, p->hidecallerid ? "" : p->cid_name, chan->cid.cid_ani ? NULL : p->cid_num); ast_setstate(chan, AST_STATE_RING); /*zt_enable_ec(p);*/ if (p->dtmfmode & MGCP_DTMF_HYBRID) { p->dtmfmode |= MGCP_DTMF_INBAND; ast_indicate(chan, -1); } res = ast_pbx_run(chan); if (res) { ast_log(LOG_WARNING, "PBX exited non-zero\n"); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_CONGESTION);*/ /*transmit_notify_request(p, "nbz", 1);*/ transmit_notify_request(sub, "G/cg"); } return NULL; } } else { /* It's a match, but they just typed a digit, and there is an ambiguous match, so just set the timeout to matchdigittimeout and wait some more */ timeout = matchdigittimeout; } } else if (res == 0) { ast_log(LOG_DEBUG, "not enough digits (and no ambiguous match)...\n"); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_CONGESTION);*/ transmit_notify_request(sub, "G/cg"); /*zt_wait_event(p->subs[index].zfd);*/ ast_hangup(chan); return NULL; } else if (p->hascallwaiting && p->callwaiting && !strcmp(p->dtmf_buf, "*70")) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Disabling call waiting on %s\n", chan->name); } /* Disable call waiting if enabled */ p->callwaiting = 0; /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); len = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); timeout = firstdigittimeout; } else if (!strcmp(p->dtmf_buf,ast_pickup_ext())) { /* Scan all channels and see if any there * ringing channqels with that have call groups * that equal this channels pickup group */ if (ast_pickup_call(chan)) { ast_log(LOG_WARNING, "No call pickup possible...\n"); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_CONGESTION);*/ transmit_notify_request(sub, "G/cg"); } memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); ast_hangup(chan); return NULL; } else if (!p->hidecallerid && !strcmp(p->dtmf_buf, "*67")) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Disabling Caller*ID on %s\n", chan->name); } /* Disable Caller*ID if enabled */ p->hidecallerid = 1; ast_set_callerid(chan, "", "", NULL); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); len = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); timeout = firstdigittimeout; } else if (p->callreturn && !strcmp(p->dtmf_buf, "*69")) { res = 0; if (!ast_strlen_zero(p->lastcallerid)) { res = ast_say_digit_str(chan, p->lastcallerid, "", chan->language); } if (!res) /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); break; } else if (!strcmp(p->dtmf_buf, "*78")) { /* Do not disturb */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Enabled DND on channel %s\n", chan->name); } /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); p->dnd = 1; getforward = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); len = 0; } else if (!strcmp(p->dtmf_buf, "*79")) { /* Do not disturb */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Disabled DND on channel %s\n", chan->name); } /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); p->dnd = 0; getforward = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); len = 0; } else if (p->cancallforward && !strcmp(p->dtmf_buf, "*72")) { /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); getforward = 1; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); len = 0; } else if (p->cancallforward && !strcmp(p->dtmf_buf, "*73")) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Cancelling call forwarding on channel %s\n", chan->name); } /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); memset(p->call_forward, 0, sizeof(p->call_forward)); getforward = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); len = 0; } else if (!strcmp(p->dtmf_buf, ast_parking_ext()) && sub->next->owner && ast_bridged_channel(sub->next->owner)) { /* This is a three way call, the main call being a real channel, and we're parking the first call. */ ast_masq_park_call(ast_bridged_channel(sub->next->owner), chan, 0, NULL); if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Parking call to '%s'\n", chan->name); } break; } else if (!ast_strlen_zero(p->lastcallerid) && !strcmp(p->dtmf_buf, "*60")) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Blacklisting number %s\n", p->lastcallerid); } res = ast_db_put("blacklist", p->lastcallerid, "1"); if (!res) { /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); len = 0; } } else if (p->hidecallerid && !strcmp(p->dtmf_buf, "*82")) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Enabling Caller*ID on %s\n", chan->name); } /* Enable Caller*ID if enabled */ p->hidecallerid = 0; ast_set_callerid(chan, p->cid_num, p->cid_name, NULL); /*res = tone_zone_play_tone(p->subs[index].zfd, ZT_TONE_DIALRECALL);*/ transmit_notify_request(sub, "L/sl"); len = 0; memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); timeout = firstdigittimeout; } else if (!ast_canmatch_extension(chan, chan->context, p->dtmf_buf, 1, chan->cid.cid_num) && ((p->dtmf_buf[0] != '*') || (strlen(p->dtmf_buf) > 2))) { if (option_debug) ast_log(LOG_DEBUG, "Can't match %s from '%s' in context %s\n", p->dtmf_buf, chan->cid.cid_num ? chan->cid.cid_num : "", chan->context); break; } if (!timeout) timeout = gendigittimeout; if (len && !ast_ignore_pattern(chan->context, p->dtmf_buf)) /*tone_zone_play_tone(p->subs[index].zfd, -1);*/ ast_indicate(chan, -1); } #if 0 for (;;) { res = ast_waitfordigit(chan, to); if (!res) { ast_log(LOG_DEBUG, "Timeout...\n"); break; } if (res < 0) { ast_log(LOG_DEBUG, "Got hangup...\n"); ast_hangup(chan); break; } exten[pos++] = res; if (!ast_ignore_pattern(chan->context, exten)) ast_indicate(chan, -1); if (ast_matchmore_extension(chan, chan->context, exten, 1, chan->callerid)) { if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid)) to = 3000; else to = 8000; } else break; } if (ast_exists_extension(chan, chan->context, exten, 1, chan->callerid)) { ast_copy_string(chan->exten, exten, sizeof(chan->exten)1); if (!p->rtp) { start_rtp(p); } ast_setstate(chan, AST_STATE_RING); chan->rings = 1; if (ast_pbx_run(chan)) { ast_log(LOG_WARNING, "Unable to launch PBX on %s\n", chan->name); } else { memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); return NULL; } } #endif ast_hangup(chan); memset(p->dtmf_buf, 0, sizeof(p->dtmf_buf)); return NULL; } static int attempt_transfer(struct mgcp_endpoint *p) { /* ************************* * I hope this works. * Copied out of chan_zap * Cross your fingers * *************************/ /* In order to transfer, we need at least one of the channels to actually be in a call bridge. We can't conference two applications together (but then, why would we want to?) */ if (ast_bridged_channel(p->sub->owner)) { /* The three-way person we're about to transfer to could still be in MOH, so stop if now if appropriate */ if (ast_bridged_channel(p->sub->next->owner)) ast_queue_control(p->sub->next->owner, AST_CONTROL_UNHOLD); if (p->sub->owner->_state == AST_STATE_RINGING) { ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING); } if (ast_channel_masquerade(p->sub->next->owner, ast_bridged_channel(p->sub->owner))) { ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n", ast_bridged_channel(p->sub->owner)->name, p->sub->next->owner->name); return -1; } /* Orphan the channel */ unalloc_sub(p->sub->next); } else if (ast_bridged_channel(p->sub->next->owner)) { if (p->sub->owner->_state == AST_STATE_RINGING) { ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING); } ast_queue_control(p->sub->next->owner, AST_CONTROL_UNHOLD); if (ast_channel_masquerade(p->sub->owner, ast_bridged_channel(p->sub->next->owner))) { ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n", ast_bridged_channel(p->sub->next->owner)->name, p->sub->owner->name); return -1; } /*swap_subs(p, SUB_THREEWAY, SUB_REAL);*/ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Swapping %d for %d on %s@%s\n", p->sub->id, p->sub->next->id, p->name, p->parent->name); } p->sub = p->sub->next; unalloc_sub(p->sub->next); /* Tell the caller not to hangup */ return 1; } else { ast_log(LOG_DEBUG, "Neither %s nor %s are in a bridge, nothing to transfer\n", p->sub->owner->name, p->sub->next->owner->name); p->sub->next->owner->_softhangup |= AST_SOFTHANGUP_DEV; if (p->sub->next->owner) { p->sub->next->alreadygone = 1; mgcp_queue_hangup(p->sub->next); } } return 0; } static void handle_hd_hf(struct mgcp_subchannel *sub, char *ev) { struct mgcp_endpoint *p = sub->parent; struct ast_channel *c; pthread_t t; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); /* Off hook / answer */ if (sub->outgoing) { /* Answered */ if (sub->owner) { if (ast_bridged_channel(sub->owner)) ast_queue_control(sub->owner, AST_CONTROL_UNHOLD); sub->cxmode = MGCP_CX_SENDRECV; if (!sub->rtp) { start_rtp(sub); } else { transmit_modify_request(sub); } /*transmit_notify_request(sub, "aw");*/ transmit_notify_request(sub, ""); mgcp_queue_control(sub, AST_CONTROL_ANSWER); } } else { /* Start switch */ /*sub->cxmode = MGCP_CX_SENDRECV;*/ if (!sub->owner) { if (!sub->rtp) { start_rtp(sub); } else { transmit_modify_request(sub); } if (p->immediate) { /* The channel is immediately up. Start right away */ #ifdef DLINK_BUGGY_FIRMWARE transmit_notify_request(sub, "rt"); #else transmit_notify_request(sub, "G/rt"); #endif c = mgcp_new(sub, AST_STATE_RING); if (!c) { ast_log(LOG_WARNING, "Unable to start PBX on channel %s@%s\n", p->name, p->parent->name); transmit_notify_request(sub, "G/cg"); ast_hangup(c); } } else { if (has_voicemail(p)) { transmit_notify_request(sub, "L/sl"); } else { transmit_notify_request(sub, "L/dl"); } c = mgcp_new(sub, AST_STATE_DOWN); if (c) { if (ast_pthread_create(&t, &attr, mgcp_ss, c)) { ast_log(LOG_WARNING, "Unable to create switch thread: %s\n", strerror(errno)); ast_hangup(c); } } else { ast_log(LOG_WARNING, "Unable to create channel for %s@%s\n", p->name, p->parent->name); } } } else { if (p->hookstate == MGCP_OFFHOOK) { ast_log(LOG_WARNING, "Off hook, but already have owner on %s@%s\n", p->name, p->parent->name); } else { ast_log(LOG_WARNING, "On hook, but already have owner on %s@%s\n", p->name, p->parent->name); ast_log(LOG_WARNING, "If we're onhook why are we here trying to handle a hd or hf?\n"); } if (ast_bridged_channel(sub->owner)) ast_queue_control(sub->owner, AST_CONTROL_UNHOLD); sub->cxmode = MGCP_CX_SENDRECV; if (!sub->rtp) { start_rtp(sub); } else { transmit_modify_request(sub); } /*transmit_notify_request(sub, "aw");*/ transmit_notify_request(sub, ""); /*ast_queue_control(sub->owner, AST_CONTROL_ANSWER);*/ } } pthread_attr_destroy(&attr); } static int handle_request(struct mgcp_subchannel *sub, struct mgcp_request *req, struct sockaddr_in *sin) { char *ev, *s; struct ast_frame f = { 0, }; struct mgcp_endpoint *p = sub->parent; struct mgcp_gateway *g = NULL; int res; if (mgcpdebug) { ast_verbose("Handling request '%s' on %s@%s\n", req->verb, p->name, p->parent->name); } /* Clear out potential response */ if (!strcasecmp(req->verb, "RSIP")) { /* Test if this RSIP request is just a keepalive */ if(!strcasecmp( get_header(req, "RM"), "X-keepalive")) { if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Received keepalive request from %s@%s\n", p->name, p->parent->name); transmit_response(sub, "200", req, "OK"); } else { dump_queue(p->parent, p); dump_cmd_queues(p, NULL); if (option_verbose > 2 && (strcmp(p->name, p->parent->wcardep) != 0)) { ast_verbose(VERBOSE_PREFIX_3 "Resetting interface %s@%s\n", p->name, p->parent->name); } /* For RSIP on wildcard we reset all endpoints */ if (!strcmp(p->name, p->parent->wcardep)) { /* Reset all endpoints */ struct mgcp_endpoint *tmp_ep; g = p->parent; tmp_ep = g->endpoints; while (tmp_ep) { /*if ((strcmp(tmp_ep->name, "*") != 0) && (strcmp(tmp_ep->name, "aaln/" "*") != 0)) {*/ if (strcmp(tmp_ep->name, g->wcardep) != 0) { struct mgcp_subchannel *tmp_sub, *first_sub; if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Resetting interface %s@%s\n", tmp_ep->name, p->parent->name); } first_sub = tmp_ep->sub; tmp_sub = tmp_ep->sub; while (tmp_sub) { mgcp_queue_hangup(tmp_sub); tmp_sub = tmp_sub->next; if (tmp_sub == first_sub) break; } } tmp_ep = tmp_ep->next; } } else if (sub->owner) { mgcp_queue_hangup(sub); } transmit_response(sub, "200", req, "OK"); /* We dont send NTFY or AUEP to wildcard ep */ if (strcmp(p->name, p->parent->wcardep) != 0) { transmit_notify_request(sub, ""); /* Audit endpoint. Idea is to prevent lost lines due to race conditions */ transmit_audit_endpoint(p); } } } else if (!strcasecmp(req->verb, "NTFY")) { /* Acknowledge and be sure we keep looking for the same things */ transmit_response(sub, "200", req, "OK"); /* Notified of an event */ ev = get_header(req, "O"); s = strchr(ev, '/'); if (s) ev = s + 1; ast_log(LOG_DEBUG, "Endpoint '%s@%s-%d' observed '%s'\n", p->name, p->parent->name, sub->id, ev); /* Keep looking for events unless this was a hangup */ if (strcasecmp(ev, "hu") && strcasecmp(ev, "hd") && strcasecmp(ev, "ping")) { transmit_notify_request(sub, p->curtone); } if (!strcasecmp(ev, "hd")) { p->hookstate = MGCP_OFFHOOK; sub->cxmode = MGCP_CX_SENDRECV; handle_hd_hf(sub, ev); } else if (!strcasecmp(ev, "hf")) { /* We can assume we are offhook if we received a hookflash */ /* First let's just do call wait and ignore threeway */ /* We're currently in charge */ if (p->hookstate != MGCP_OFFHOOK) { /* Cisco c7940 sends hf even if the phone is onhook */ /* Thanks to point on IRC for pointing this out */ return -1; } /* do not let * conference two down channels */ if (sub->owner && sub->owner->_state == AST_STATE_DOWN && !sub->next->owner) return -1; if (p->callwaiting || p->transfer || p->threewaycalling) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Swapping %d for %d on %s@%s\n", p->sub->id, p->sub->next->id, p->name, p->parent->name); } p->sub = p->sub->next; /* transfer control to our next subchannel */ if (!sub->next->owner) { /* plave the first call on hold and start up a new call */ sub->cxmode = MGCP_CX_MUTE; if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP Muting %d on %s@%s\n", sub->id, p->name, p->parent->name); } transmit_modify_request(sub); if (sub->owner && ast_bridged_channel(sub->owner)) ast_queue_control(sub->owner, AST_CONTROL_HOLD); sub->next->cxmode = MGCP_CX_RECVONLY; handle_hd_hf(sub->next, ev); } else if (sub->owner && sub->next->owner) { /* We've got two active calls lets decide whether or not to conference or just flip flop */ if ((!sub->outgoing) && (!sub->next->outgoing)) { /* We made both calls lets conferenct */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP Conferencing %d and %d on %s@%s\n", sub->id, sub->next->id, p->name, p->parent->name); } sub->cxmode = MGCP_CX_CONF; sub->next->cxmode = MGCP_CX_CONF; if (ast_bridged_channel(sub->next->owner)) ast_queue_control(sub->next->owner, AST_CONTROL_UNHOLD); transmit_modify_request(sub); transmit_modify_request(sub->next); } else { /* Let's flipflop between calls */ /* XXX Need to check for state up ??? */ /* XXX Need a way to indicate the current call, or maybe the call that's waiting */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "We didn't make one of the calls FLIPFLOP %d and %d on %s@%s\n", sub->id, sub->next->id, p->name, p->parent->name); } sub->cxmode = MGCP_CX_MUTE; if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP Muting %d on %s@%s\n", sub->id, p->name, p->parent->name); } transmit_modify_request(sub); if (ast_bridged_channel(sub->owner)) ast_queue_control(sub->owner, AST_CONTROL_HOLD); if (ast_bridged_channel(sub->next->owner)) ast_queue_control(sub->next->owner, AST_CONTROL_HOLD); handle_hd_hf(sub->next, ev); } } else { /* We've most likely lost one of our calls find an active call and bring it up */ if (sub->owner) { p->sub = sub; } else if (sub->next->owner) { p->sub = sub->next; } else { /* We seem to have lost both our calls */ /* XXX - What do we do now? */ return -1; } if (ast_bridged_channel(p->sub->owner)) ast_queue_control(p->sub->owner, AST_CONTROL_UNHOLD); p->sub->cxmode = MGCP_CX_SENDRECV; transmit_modify_request(p->sub); } } else { ast_log(LOG_WARNING, "Callwaiting, call transfer or threeway calling not enabled on endpoint %s@%s\n", p->name, p->parent->name); } } else if (!strcasecmp(ev, "hu")) { p->hookstate = MGCP_ONHOOK; sub->cxmode = MGCP_CX_RECVONLY; ast_log(LOG_DEBUG, "MGCP %s@%s Went on hook\n", p->name, p->parent->name); /* Do we need to send MDCX before a DLCX ? if (sub->rtp) { transmit_modify_request(sub); } */ if (p->transfer && (sub->owner && sub->next->owner) && ((!sub->outgoing) || (!sub->next->outgoing))) { /* We're allowed to transfer, we have two avtive calls and */ /* we made at least one of the calls. Let's try and transfer */ ast_mutex_lock(&p->sub->next->lock); res = attempt_transfer(p); if (res < 0) { if (p->sub->next->owner) { sub->next->alreadygone = 1; mgcp_queue_hangup(sub->next); } } else if (res) { ast_log(LOG_WARNING, "Transfer attempt failed\n"); ast_mutex_unlock(&p->sub->next->lock); return -1; } ast_mutex_unlock(&p->sub->next->lock); } else { /* Hangup the current call */ /* If there is another active call, mgcp_hangup will ring the phone with the other call */ if (sub->owner) { sub->alreadygone = 1; mgcp_queue_hangup(sub); } else { /* verbose level check */ if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP handle_request(%s@%s-%d) ast_channel already destroyed, resending DLCX.\n", p->name, p->parent->name, sub->id); } /* Instruct the other side to remove the connection since it apparently * * still thinks the channel is active. * * For Cisco IAD2421 /BAK/ */ transmit_connection_del(sub); } } if ((p->hookstate == MGCP_ONHOOK) && (!sub->rtp) && (!sub->next->rtp)) { p->hidecallerid = 0; if (p->hascallwaiting && !p->callwaiting) { if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Enabling call waiting on MGCP/%s@%s-%d\n", p->name, p->parent->name, sub->id); p->callwaiting = -1; } if (has_voicemail(p)) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP handle_request(%s@%s) set vmwi(+)\n", p->name, p->parent->name); } transmit_notify_request(sub, "L/vmwi(+)"); } else { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP handle_request(%s@%s) set vmwi(-)\n", p->name, p->parent->name); } transmit_notify_request(sub, "L/vmwi(-)"); } } } else if ((strlen(ev) == 1) && (((ev[0] >= '0') && (ev[0] <= '9')) || ((ev[0] >= 'A') && (ev[0] <= 'D')) || (ev[0] == '*') || (ev[0] == '#'))) { if (sub && sub->owner && (sub->owner->_state >= AST_STATE_UP)) { f.frametype = AST_FRAME_DTMF; f.subclass = ev[0]; f.src = "mgcp"; /* XXX MUST queue this frame to all subs in threeway call if threeway call is active */ mgcp_queue_frame(sub, &f); ast_mutex_lock(&sub->next->lock); if (sub->next->owner) mgcp_queue_frame(sub->next, &f); ast_mutex_unlock(&sub->next->lock); if (strstr(p->curtone, "wt") && (ev[0] == 'A')) { memset(p->curtone, 0, sizeof(p->curtone)); } } else { p->dtmf_buf[strlen(p->dtmf_buf)] = ev[0]; p->dtmf_buf[strlen(p->dtmf_buf)] = '\0'; } } else if (!strcasecmp(ev, "T")) { /* Digit timeout -- unimportant */ } else if (!strcasecmp(ev, "ping")) { /* ping -- unimportant */ } else { ast_log(LOG_NOTICE, "Received unknown event '%s' from %s@%s\n", ev, p->name, p->parent->name); } } else { ast_log(LOG_WARNING, "Unknown verb '%s' received from %s\n", req->verb, ast_inet_ntoa(sin->sin_addr)); transmit_response(sub, "510", req, "Unknown verb"); } return 0; } static int find_and_retrans(struct mgcp_subchannel *sub, struct mgcp_request *req) { int seqno=0; time_t now; struct mgcp_response *prev = NULL, *cur, *next, *answer=NULL; time(&now); if (sscanf(req->identifier, "%d", &seqno) != 1) seqno = 0; cur = sub->parent->parent->responses; while(cur) { next = cur->next; if (now - cur->whensent > RESPONSE_TIMEOUT) { /* Delete this entry */ if (prev) prev->next = next; else sub->parent->parent->responses = next; free(cur); } else { if (seqno == cur->seqno) answer = cur; prev = cur; } cur = next; } if (answer) { resend_response(sub, answer); return 1; } return 0; } static int mgcpsock_read(int *id, int fd, short events, void *ignore) { struct mgcp_request req; struct sockaddr_in sin; struct mgcp_subchannel *sub; int res; socklen_t len; int result; int ident; len = sizeof(sin); memset(&req, 0, sizeof(req)); res = recvfrom(mgcpsock, req.data, sizeof(req.data) - 1, 0, (struct sockaddr *)&sin, &len); if (res < 0) { if (errno != ECONNREFUSED) ast_log(LOG_WARNING, "Recv error: %s\n", strerror(errno)); return 1; } req.data[res] = '\0'; req.len = res; if (mgcpdebug) { ast_verbose("MGCP read: \n%s\nfrom %s:%d\n", req.data, ast_inet_ntoa(sin.sin_addr), ntohs(sin.sin_port)); } parse(&req); if (req.headers < 1) { /* Must have at least one header */ return 1; } if (ast_strlen_zero(req.identifier)) { ast_log(LOG_NOTICE, "Message from %s missing identifier\n", ast_inet_ntoa(sin.sin_addr)); return 1; } if (sscanf(req.verb, "%d", &result) && sscanf(req.identifier, "%d", &ident)) { /* Try to find who this message is for, if it's important */ sub = find_subchannel_and_lock(NULL, ident, &sin); if (sub) { struct mgcp_gateway *gw = sub->parent->parent; struct mgcp_message *cur, *prev; ast_mutex_unlock(&sub->lock); ast_mutex_lock(&gw->msgs_lock); for (prev = NULL, cur = gw->msgs; cur; prev = cur, cur = cur->next) { if (cur->seqno == ident) { ast_log(LOG_DEBUG, "Got response back on transaction %d\n", ident); if (prev) prev->next = cur->next; else gw->msgs = cur->next; break; } } /* stop retrans timer if the queue is empty */ if (!gw->msgs && (gw->retransid != -1)) { ast_sched_del(sched, gw->retransid); gw->retransid = -1; } ast_mutex_unlock(&gw->msgs_lock); if (cur) { handle_response(cur->owner_ep, cur->owner_sub, result, ident, &req); free(cur); return 1; } ast_log(LOG_NOTICE, "Got response back on [%s] for transaction %d we aren't sending?\n", gw->name, ident); } } else { if (ast_strlen_zero(req.endpoint) || ast_strlen_zero(req.version) || ast_strlen_zero(req.verb)) { ast_log(LOG_NOTICE, "Message must have a verb, an idenitifier, version, and endpoint\n"); return 1; } /* Process request, with iflock held */ sub = find_subchannel_and_lock(req.endpoint, 0, &sin); if (sub) { /* look first to find a matching response in the queue */ if (!find_and_retrans(sub, &req)) /* pass the request off to the currently mastering subchannel */ handle_request(sub, &req, &sin); ast_mutex_unlock(&sub->lock); } } return 1; } static int *mgcpsock_read_id = NULL; static void *do_monitor(void *data) { int res; int reloading; /*struct mgcp_gateway *g;*/ /*struct mgcp_endpoint *e;*/ /*time_t thispass = 0, lastpass = 0;*/ /* Add an I/O event to our UDP socket */ if (mgcpsock > -1) mgcpsock_read_id = ast_io_add(io, mgcpsock, mgcpsock_read, AST_IO_IN, NULL); /* This thread monitors all the frame relay interfaces which are not yet in use (and thus do not have a separate thread) indefinitely */ /* From here on out, we die whenever asked */ for(;;) { /* Check for a reload request */ ast_mutex_lock(&mgcp_reload_lock); reloading = mgcp_reloading; mgcp_reloading = 0; ast_mutex_unlock(&mgcp_reload_lock); if (reloading) { if (option_verbose > 0) ast_verbose(VERBOSE_PREFIX_1 "Reloading MGCP\n"); mgcp_do_reload(); /* Add an I/O event to our UDP socket */ if (mgcpsock > -1) mgcpsock_read_id = ast_io_add(io, mgcpsock, mgcpsock_read, AST_IO_IN, NULL); } /* Check for interfaces needing to be killed */ /* Don't let anybody kill us right away. Nobody should lock the interface list and wait for the monitor list, but the other way around is okay. */ ast_mutex_lock(&monlock); /* Lock the network interface */ ast_mutex_lock(&netlock); #if 0 /* XXX THIS IS COMPLETELY HOSED */ /* The gateway goes into a state of panic */ /* If the vmwi indicator is sent while it is reseting interfaces */ lastpass = thispass; thispass = time(NULL); g = gateways; while(g) { if (thispass != lastpass) { e = g->endpoints; while(e) { if (e->type == TYPE_LINE) { res = has_voicemail(e); if ((e->msgstate != res) && (e->hookstate == MGCP_ONHOOK) && (!e->rtp)){ if (res) { transmit_notify_request(e, "L/vmwi(+)"); } else { transmit_notify_request(e, "L/vmwi(-)"); } e->msgstate = res; e->onhooktime = thispass; } } e = e->next; } } g = g->next; } #endif /* Okay, now that we know what to do, release the network lock */ ast_mutex_unlock(&netlock); /* And from now on, we're okay to be killed, so release the monitor lock as well */ ast_mutex_unlock(&monlock); pthread_testcancel(); /* Wait for sched or io */ res = ast_sched_wait(sched); /* copied from chan_sip.c */ if ((res < 0) || (res > 1000)) res = 1000; res = ast_io_wait(io, res); ast_mutex_lock(&monlock); if (res >= 0) ast_sched_runq(sched); ast_mutex_unlock(&monlock); } /* Never reached */ return NULL; } static int restart_monitor(void) { /* If we're supposed to be stopped -- stay stopped */ if (monitor_thread == AST_PTHREADT_STOP) return 0; if (ast_mutex_lock(&monlock)) { ast_log(LOG_WARNING, "Unable to lock monitor\n"); return -1; } if (monitor_thread == pthread_self()) { ast_mutex_unlock(&monlock); ast_log(LOG_WARNING, "Cannot kill myself\n"); return -1; } if (monitor_thread != AST_PTHREADT_NULL) { /* Wake up the thread */ pthread_kill(monitor_thread, SIGURG); } else { /* Start a new monitor */ if (ast_pthread_create_background(&monitor_thread, NULL, do_monitor, NULL) < 0) { ast_mutex_unlock(&monlock); ast_log(LOG_ERROR, "Unable to start monitor thread.\n"); return -1; } } ast_mutex_unlock(&monlock); return 0; } static struct ast_channel *mgcp_request(const char *type, int format, void *data, int *cause) { int oldformat; struct mgcp_subchannel *sub; struct ast_channel *tmpc = NULL; char tmp[256]; char *dest = data; oldformat = format; format &= capability; if (!format) { ast_log(LOG_NOTICE, "Asked to get a channel of unsupported format '%d'\n", format); return NULL; } ast_copy_string(tmp, dest, sizeof(tmp)); if (ast_strlen_zero(tmp)) { ast_log(LOG_NOTICE, "MGCP Channels require an endpoint\n"); return NULL; } sub = find_subchannel_and_lock(tmp, 0, NULL); if (!sub) { ast_log(LOG_WARNING, "Unable to find MGCP endpoint '%s'\n", tmp); *cause = AST_CAUSE_UNREGISTERED; return NULL; } if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_request(%s)\n", tmp); ast_verbose(VERBOSE_PREFIX_3 "MGCP cw: %d, dnd: %d, so: %d, sno: %d\n", sub->parent->callwaiting, sub->parent->dnd, sub->owner ? 1 : 0, sub->next->owner ? 1: 0); } /* Must be busy */ if (((sub->parent->callwaiting) && ((sub->owner) && (sub->next->owner))) || ((!sub->parent->callwaiting) && (sub->owner)) || (sub->parent->dnd && (ast_strlen_zero(sub->parent->call_forward)))) { if (sub->parent->hookstate == MGCP_ONHOOK) { if (has_voicemail(sub->parent)) { transmit_notify_request(sub,"L/vmwi(+)"); } else { transmit_notify_request(sub,"L/vmwi(-)"); } } *cause = AST_CAUSE_BUSY; ast_mutex_unlock(&sub->lock); return NULL; } tmpc = mgcp_new(sub->owner ? sub->next : sub, AST_STATE_DOWN); ast_mutex_unlock(&sub->lock); if (!tmpc) ast_log(LOG_WARNING, "Unable to make channel for '%s'\n", tmp); restart_monitor(); return tmpc; } /* modified for reload support */ /*! \brief build_gateway: parse mgcp.conf and create gateway/endpoint structures */ static struct mgcp_gateway *build_gateway(char *cat, struct ast_variable *v) { struct mgcp_gateway *gw; struct mgcp_endpoint *e; struct mgcp_subchannel *sub; /*char txident[80];*/ int i=0, y=0; int gw_reload = 0; int ep_reload = 0; canreinvite = CANREINVITE; /* locate existing gateway */ gw = gateways; while (gw) { if (!strcasecmp(cat, gw->name)) { /* gateway already exists */ gw->delme = 0; gw_reload = 1; break; } gw = gw->next; } if (!gw) gw = malloc(sizeof(struct mgcp_gateway)); if (gw) { if (!gw_reload) { memset(gw, 0, sizeof(struct mgcp_gateway)); gw->expire = -1; gw->retransid = -1; /* SC */ ast_mutex_init(&gw->msgs_lock); ast_copy_string(gw->name, cat, sizeof(gw->name)); /* check if the name is numeric ip */ if ((strchr(gw->name, '.')) && inet_addr(gw->name) != INADDR_NONE) gw->isnamedottedip = 1; } while(v) { if (!strcasecmp(v->name, "host")) { if (!strcasecmp(v->value, "dynamic")) { /* They'll register with us */ gw->dynamic = 1; memset(&gw->addr.sin_addr, 0, 4); if (gw->addr.sin_port) { /* If we've already got a port, make it the default rather than absolute */ gw->defaddr.sin_port = gw->addr.sin_port; gw->addr.sin_port = 0; } } else { /* Non-dynamic. Make sure we become that way if we're not */ if (gw->expire > -1) ast_sched_del(sched, gw->expire); gw->expire = -1; gw->dynamic = 0; if (ast_get_ip(&gw->addr, v->value)) { if (!gw_reload) { ast_mutex_destroy(&gw->msgs_lock); free(gw); } return NULL; } } } else if (!strcasecmp(v->name, "defaultip")) { if (ast_get_ip(&gw->defaddr, v->value)) { if (!gw_reload) { ast_mutex_destroy(&gw->msgs_lock); free(gw); } return NULL; } } else if (!strcasecmp(v->name, "permit") || !strcasecmp(v->name, "deny")) { gw->ha = ast_append_ha(v->name, v->value, gw->ha); } else if (!strcasecmp(v->name, "port")) { gw->addr.sin_port = htons(atoi(v->value)); } else if (!strcasecmp(v->name, "context")) { ast_copy_string(context, v->value, sizeof(context)); } else if (!strcasecmp(v->name, "dtmfmode")) { if (!strcasecmp(v->value, "inband")) dtmfmode = MGCP_DTMF_INBAND; else if (!strcasecmp(v->value, "rfc2833")) dtmfmode = MGCP_DTMF_RFC2833; else if (!strcasecmp(v->value, "hybrid")) dtmfmode = MGCP_DTMF_HYBRID; else if (!strcasecmp(v->value, "none")) dtmfmode = 0; else ast_log(LOG_WARNING, "'%s' is not a valid DTMF mode at line %d\n", v->value, v->lineno); } else if (!strcasecmp(v->name, "nat")) { nat = ast_true(v->value); } else if (!strcasecmp(v->name, "callerid")) { if (!strcasecmp(v->value, "asreceived")) { cid_num[0] = '\0'; cid_name[0] = '\0'; } else { ast_callerid_split(v->value, cid_name, sizeof(cid_name), cid_num, sizeof(cid_num)); } } else if (!strcasecmp(v->name, "language")) { ast_copy_string(language, v->value, sizeof(language)); } else if (!strcasecmp(v->name, "accountcode")) { ast_copy_string(accountcode, v->value, sizeof(accountcode)); } else if (!strcasecmp(v->name, "amaflags")) { y = ast_cdr_amaflags2int(v->value); if (y < 0) { ast_log(LOG_WARNING, "Invalid AMA flags: %s at line %d\n", v->value, v->lineno); } else { amaflags = y; } } else if (!strcasecmp(v->name, "musiconhold")) { ast_copy_string(musicclass, v->value, sizeof(musicclass)); } else if (!strcasecmp(v->name, "callgroup")) { cur_callergroup = ast_get_group(v->value); } else if (!strcasecmp(v->name, "pickupgroup")) { cur_pickupgroup = ast_get_group(v->value); } else if (!strcasecmp(v->name, "immediate")) { immediate = ast_true(v->value); } else if (!strcasecmp(v->name, "cancallforward")) { cancallforward = ast_true(v->value); } else if (!strcasecmp(v->name, "singlepath")) { singlepath = ast_true(v->value); } else if (!strcasecmp(v->name, "canreinvite")) { canreinvite = ast_true(v->value); } else if (!strcasecmp(v->name, "mailbox")) { ast_copy_string(mailbox, v->value, sizeof(mailbox)); } else if (!strcasecmp(v->name, "adsi")) { adsi = ast_true(v->value); } else if (!strcasecmp(v->name, "callreturn")) { callreturn = ast_true(v->value); } else if (!strcasecmp(v->name, "callwaiting")) { callwaiting = ast_true(v->value); } else if (!strcasecmp(v->name, "slowsequence")) { slowsequence = ast_true(v->value); } else if (!strcasecmp(v->name, "transfer")) { transfer = ast_true(v->value); } else if (!strcasecmp(v->name, "threewaycalling")) { threewaycalling = ast_true(v->value); } else if (!strcasecmp(v->name, "wcardep")) { /* locate existing endpoint */ e = gw->endpoints; while (e) { if (!strcasecmp(v->value, e->name)) { /* endpoint already exists */ e->delme = 0; ep_reload = 1; break; } e = e->next; } if (!e) { /* Allocate wildcard endpoint */ e = malloc(sizeof(struct mgcp_endpoint)); ep_reload = 0; } if (e) { if (!ep_reload) { memset(e, 0, sizeof(struct mgcp_endpoint)); ast_mutex_init(&e->lock); ast_mutex_init(&e->rqnt_queue_lock); ast_mutex_init(&e->cmd_queue_lock); ast_copy_string(e->name, v->value, sizeof(e->name)); e->needaudit = 1; } ast_copy_string(gw->wcardep, v->value, sizeof(gw->wcardep)); /* XXX Should we really check for uniqueness?? XXX */ ast_copy_string(e->accountcode, accountcode, sizeof(e->accountcode)); ast_copy_string(e->context, context, sizeof(e->context)); ast_copy_string(e->cid_num, cid_num, sizeof(e->cid_num)); ast_copy_string(e->cid_name, cid_name, sizeof(e->cid_name)); ast_copy_string(e->language, language, sizeof(e->language)); ast_copy_string(e->musicclass, musicclass, sizeof(e->musicclass)); ast_copy_string(e->mailbox, mailbox, sizeof(e->mailbox)); snprintf(e->rqnt_ident, sizeof(e->rqnt_ident), "%08lx", ast_random()); e->msgstate = -1; e->amaflags = amaflags; e->capability = capability; e->parent = gw; e->dtmfmode = dtmfmode; if (!ep_reload && e->sub && e->sub->rtp) e->dtmfmode |= MGCP_DTMF_INBAND; e->adsi = adsi; e->type = TYPE_LINE; e->immediate = immediate; e->callgroup=cur_callergroup; e->pickupgroup=cur_pickupgroup; e->callreturn = callreturn; e->cancallforward = cancallforward; e->singlepath = singlepath; e->canreinvite = canreinvite; e->callwaiting = callwaiting; e->hascallwaiting = callwaiting; e->slowsequence = slowsequence; e->transfer = transfer; e->threewaycalling = threewaycalling; e->onhooktime = time(NULL); /* ASSUME we're onhook */ e->hookstate = MGCP_ONHOOK; if (!ep_reload) { /*snprintf(txident, sizeof(txident), "%08lx", ast_random());*/ for (i = 0; i < MAX_SUBS; i++) { sub = malloc(sizeof(struct mgcp_subchannel)); if (sub) { ast_verbose(VERBOSE_PREFIX_3 "Allocating subchannel '%d' on %s@%s\n", i, e->name, gw->name); memset(sub, 0, sizeof(struct mgcp_subchannel)); ast_mutex_init(&sub->lock); ast_mutex_init(&sub->cx_queue_lock); sub->parent = e; sub->id = i; snprintf(sub->txident, sizeof(sub->txident), "%08lx", ast_random()); /*stnrcpy(sub->txident, txident, sizeof(sub->txident) - 1);*/ sub->cxmode = MGCP_CX_INACTIVE; sub->nat = nat; sub->next = e->sub; e->sub = sub; } else { /* XXX Should find a way to clean up our memory */ ast_log(LOG_WARNING, "Out of memory allocating subchannel\n"); return NULL; } } /* Make out subs a circular linked list so we can always sping through the whole bunch */ sub = e->sub; /* find the end of the list */ while(sub->next){ sub = sub->next; } /* set the last sub->next to the first sub */ sub->next = e->sub; e->next = gw->endpoints; gw->endpoints = e; } } } else if (!strcasecmp(v->name, "trunk") || !strcasecmp(v->name, "line")) { /* locate existing endpoint */ e = gw->endpoints; while (e) { if (!strcasecmp(v->value, e->name)) { /* endpoint already exists */ e->delme = 0; ep_reload = 1; break; } e = e->next; } if (!e) { e = malloc(sizeof(struct mgcp_endpoint)); ep_reload = 0; } if (e) { if (!ep_reload) { memset(e, 0, sizeof(struct mgcp_endpoint)); ast_mutex_init(&e->lock); ast_mutex_init(&e->rqnt_queue_lock); ast_mutex_init(&e->cmd_queue_lock); ast_copy_string(e->name, v->value, sizeof(e->name)); e->needaudit = 1; } /* XXX Should we really check for uniqueness?? XXX */ ast_copy_string(e->accountcode, accountcode, sizeof(e->accountcode)); ast_copy_string(e->context, context, sizeof(e->context)); ast_copy_string(e->cid_num, cid_num, sizeof(e->cid_num)); ast_copy_string(e->cid_name, cid_name, sizeof(e->cid_name)); ast_copy_string(e->language, language, sizeof(e->language)); ast_copy_string(e->musicclass, musicclass, sizeof(e->musicclass)); ast_copy_string(e->mailbox, mailbox, sizeof(e->mailbox)); if (!ast_strlen_zero(mailbox)) { ast_verbose(VERBOSE_PREFIX_3 "Setting mailbox '%s' on %s@%s\n", mailbox, gw->name, e->name); } if (!ep_reload) { /* XXX potential issue due to reload */ e->msgstate = -1; e->parent = gw; } e->amaflags = amaflags; e->capability = capability; e->dtmfmode = dtmfmode; e->adsi = adsi; if (!strcasecmp(v->name, "trunk")) e->type = TYPE_TRUNK; else e->type = TYPE_LINE; e->immediate = immediate; e->callgroup=cur_callergroup; e->pickupgroup=cur_pickupgroup; e->callreturn = callreturn; e->cancallforward = cancallforward; e->canreinvite = canreinvite; e->singlepath = singlepath; e->callwaiting = callwaiting; e->hascallwaiting = callwaiting; e->slowsequence = slowsequence; e->transfer = transfer; e->threewaycalling = threewaycalling; if (!ep_reload) { e->onhooktime = time(NULL); /* ASSUME we're onhook */ e->hookstate = MGCP_ONHOOK; snprintf(e->rqnt_ident, sizeof(e->rqnt_ident), "%08lx", ast_random()); } for (i = 0, sub = NULL; i < MAX_SUBS; i++) { if (!ep_reload) { sub = malloc(sizeof(struct mgcp_subchannel)); } else { if (!sub) sub = e->sub; else sub = sub->next; } if (sub) { if (!ep_reload) { ast_verbose(VERBOSE_PREFIX_3 "Allocating subchannel '%d' on %s@%s\n", i, e->name, gw->name); memset(sub, 0, sizeof(struct mgcp_subchannel)); ast_mutex_init(&sub->lock); ast_mutex_init(&sub->cx_queue_lock); ast_copy_string(sub->magic, MGCP_SUBCHANNEL_MAGIC, sizeof(sub->magic)); sub->parent = e; sub->id = i; snprintf(sub->txident, sizeof(sub->txident), "%08lx", ast_random()); sub->cxmode = MGCP_CX_INACTIVE; sub->next = e->sub; e->sub = sub; } sub->nat = nat; } else { /* XXX Should find a way to clean up our memory */ ast_log(LOG_WARNING, "Out of memory allocating subchannel\n"); return NULL; } } if (!ep_reload) { /* Make out subs a circular linked list so we can always sping through the whole bunch */ sub = e->sub; /* find the end of the list */ while (sub->next) { sub = sub->next; } /* set the last sub->next to the first sub */ sub->next = e->sub; e->next = gw->endpoints; gw->endpoints = e; } } } else ast_log(LOG_WARNING, "Don't know keyword '%s' at line %d\n", v->name, v->lineno); v = v->next; } } if (!ntohl(gw->addr.sin_addr.s_addr) && !gw->dynamic) { ast_log(LOG_WARNING, "Gateway '%s' lacks IP address and isn't dynamic\n", gw->name); if (!gw_reload) { ast_mutex_destroy(&gw->msgs_lock); free(gw); } return NULL; } gw->defaddr.sin_family = AF_INET; gw->addr.sin_family = AF_INET; if (gw->defaddr.sin_addr.s_addr && !ntohs(gw->defaddr.sin_port)) gw->defaddr.sin_port = htons(DEFAULT_MGCP_GW_PORT); if (gw->addr.sin_addr.s_addr && !ntohs(gw->addr.sin_port)) gw->addr.sin_port = htons(DEFAULT_MGCP_GW_PORT); if (gw->addr.sin_addr.s_addr) if (ast_ouraddrfor(&gw->addr.sin_addr, &gw->ourip)) memcpy(&gw->ourip, &__ourip, sizeof(gw->ourip)); return (gw_reload ? NULL : gw); } static enum ast_rtp_get_result mgcp_get_rtp_peer(struct ast_channel *chan, struct ast_rtp **rtp) { struct mgcp_subchannel *sub = NULL; if (!(sub = chan->tech_pvt) || !(sub->rtp)) return AST_RTP_GET_FAILED; *rtp = sub->rtp; if (sub->parent->canreinvite) return AST_RTP_TRY_NATIVE; else return AST_RTP_TRY_PARTIAL; } static int mgcp_set_rtp_peer(struct ast_channel *chan, struct ast_rtp *rtp, struct ast_rtp *vrtp, int codecs, int nat_active) { /* XXX Is there such thing as video support with MGCP? XXX */ struct mgcp_subchannel *sub; sub = chan->tech_pvt; if (sub && !sub->alreadygone) { transmit_modify_with_sdp(sub, rtp, codecs); return 0; } return -1; } static struct ast_rtp_protocol mgcp_rtp = { .type = "MGCP", .get_rtp_info = mgcp_get_rtp_peer, .set_rtp_peer = mgcp_set_rtp_peer, }; static void destroy_endpoint(struct mgcp_endpoint *e) { struct mgcp_subchannel *sub = e->sub->next, *s; int i; for (i = 0; i < MAX_SUBS; i++) { ast_mutex_lock(&sub->lock); if (!ast_strlen_zero(sub->cxident)) { transmit_connection_del(sub); } if (sub->rtp) { ast_rtp_destroy(sub->rtp); sub->rtp = NULL; } memset(sub->magic, 0, sizeof(sub->magic)); mgcp_queue_hangup(sub); dump_cmd_queues(NULL, sub); ast_mutex_unlock(&sub->lock); sub = sub->next; } if (e->dsp) { ast_dsp_free(e->dsp); } dump_queue(e->parent, e); dump_cmd_queues(e, NULL); sub = e->sub; for (i = 0; (i < MAX_SUBS) && sub; i++) { s = sub; sub = sub->next; ast_mutex_destroy(&s->lock); ast_mutex_destroy(&s->cx_queue_lock); free(s); } ast_mutex_destroy(&e->lock); ast_mutex_destroy(&e->rqnt_queue_lock); ast_mutex_destroy(&e->cmd_queue_lock); free(e); } static void destroy_gateway(struct mgcp_gateway *g) { if (g->ha) ast_free_ha(g->ha); dump_queue(g, NULL); free (g); } static void prune_gateways(void) { struct mgcp_gateway *g, *z, *r; struct mgcp_endpoint *e, *p, *t; ast_mutex_lock(&gatelock); /* prune gateways */ for (z = NULL, g = gateways; g;) { /* prune endpoints */ for (p = NULL, e = g->endpoints; e; ) { if (e->delme || g->delme) { t = e; e = e->next; if (!p) g->endpoints = e; else p->next = e; destroy_endpoint(t); } else { p = e; e = e->next; } } if (g->delme) { r = g; g = g->next; if (!z) gateways = g; else z->next = g; destroy_gateway(r); } else { z = g; g = g->next; } } ast_mutex_unlock(&gatelock); } static int reload_config(void) { struct ast_config *cfg; struct ast_variable *v; struct mgcp_gateway *g; struct mgcp_endpoint *e; char *cat; struct ast_hostent ahp; struct hostent *hp; int format; if (gethostname(ourhost, sizeof(ourhost)-1)) { ast_log(LOG_WARNING, "Unable to get hostname, MGCP disabled\n"); return 0; } cfg = ast_config_load(config); /* We *must* have a config file otherwise stop immediately */ if (!cfg) { ast_log(LOG_NOTICE, "Unable to load config %s, MGCP disabled\n", config); return 0; } memset(&bindaddr, 0, sizeof(bindaddr)); dtmfmode = 0; /* Copy the default jb config over global_jbconf */ memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf)); v = ast_variable_browse(cfg, "general"); while (v) { /* handle jb conf */ if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) { v = v->next; continue; } /* Create the interface list */ if (!strcasecmp(v->name, "bindaddr")) { if (!(hp = ast_gethostbyname(v->value, &ahp))) { ast_log(LOG_WARNING, "Invalid address: %s\n", v->value); } else { memcpy(&bindaddr.sin_addr, hp->h_addr, sizeof(bindaddr.sin_addr)); } } else if (!strcasecmp(v->name, "allow")) { format = ast_getformatbyname(v->value); if (format < 1) ast_log(LOG_WARNING, "Cannot allow unknown format '%s'\n", v->value); else capability |= format; } else if (!strcasecmp(v->name, "disallow")) { format = ast_getformatbyname(v->value); if (format < 1) ast_log(LOG_WARNING, "Cannot disallow unknown format '%s'\n", v->value); else capability &= ~format; } else if (!strcasecmp(v->name, "tos")) { if (sscanf(v->value, "%d", &format) == 1) tos = format & 0xff; else if (!strcasecmp(v->value, "lowdelay")) tos = IPTOS_LOWDELAY; else if (!strcasecmp(v->value, "throughput")) tos = IPTOS_THROUGHPUT; else if (!strcasecmp(v->value, "reliability")) tos = IPTOS_RELIABILITY; else if (!strcasecmp(v->value, "mincost")) tos = IPTOS_MINCOST; else if (!strcasecmp(v->value, "none")) tos = 0; else ast_log(LOG_WARNING, "Invalid tos value at line %d, should be 'lowdelay', 'throughput', 'reliability', 'mincost', or 'none'\n", v->lineno); } else if (!strcasecmp(v->name, "port")) { if (sscanf(v->value, "%d", &ourport) == 1) { bindaddr.sin_port = htons(ourport); } else { ast_log(LOG_WARNING, "Invalid port number '%s' at line %d of %s\n", v->value, v->lineno, config); } } v = v->next; } /* mark existing entries for deletion */ ast_mutex_lock(&gatelock); g = gateways; while (g) { g->delme = 1; e = g->endpoints; while (e) { e->delme = 1; e = e->next; } g = g->next; } ast_mutex_unlock(&gatelock); cat = ast_category_browse(cfg, NULL); while(cat) { if (strcasecmp(cat, "general")) { ast_mutex_lock(&gatelock); g = build_gateway(cat, ast_variable_browse(cfg, cat)); if (g) { if (option_verbose > 2) { ast_verbose(VERBOSE_PREFIX_3 "Added gateway '%s'\n", g->name); } g->next = gateways; gateways = g; } ast_mutex_unlock(&gatelock); /* FS: process queue and IO */ if (monitor_thread == pthread_self()) { if (sched) ast_sched_runq(sched); if (io) ast_io_wait(io, 10); } } cat = ast_category_browse(cfg, cat); } /* prune deleted entries etc. */ prune_gateways(); if (ntohl(bindaddr.sin_addr.s_addr)) { memcpy(&__ourip, &bindaddr.sin_addr, sizeof(__ourip)); } else { hp = ast_gethostbyname(ourhost, &ahp); if (!hp) { ast_log(LOG_WARNING, "Unable to get our IP address, MGCP disabled\n"); ast_config_destroy(cfg); return 0; } memcpy(&__ourip, hp->h_addr, sizeof(__ourip)); } if (!ntohs(bindaddr.sin_port)) bindaddr.sin_port = ntohs(DEFAULT_MGCP_CA_PORT); bindaddr.sin_family = AF_INET; ast_mutex_lock(&netlock); if (mgcpsock > -1) close(mgcpsock); if (mgcpsock_read_id != NULL) ast_io_remove(io, mgcpsock_read_id); mgcpsock_read_id = NULL; mgcpsock = socket(AF_INET, SOCK_DGRAM, 0); if (mgcpsock < 0) { ast_log(LOG_WARNING, "Unable to create MGCP socket: %s\n", strerror(errno)); } else { if (bind(mgcpsock, (struct sockaddr *)&bindaddr, sizeof(bindaddr)) < 0) { ast_log(LOG_WARNING, "Failed to bind to %s:%d: %s\n", ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port), strerror(errno)); close(mgcpsock); mgcpsock = -1; } else { if (option_verbose > 1) { ast_verbose(VERBOSE_PREFIX_2 "MGCP Listening on %s:%d\n", ast_inet_ntoa(bindaddr.sin_addr), ntohs(bindaddr.sin_port)); ast_verbose(VERBOSE_PREFIX_2 "Using TOS bits %d\n", tos); } if (setsockopt(mgcpsock, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))) ast_log(LOG_WARNING, "Unable to set TOS to %d\n", tos); } } ast_mutex_unlock(&netlock); ast_config_destroy(cfg); /* send audit only to the new endpoints */ g = gateways; while (g) { e = g->endpoints; while (e && e->needaudit) { e->needaudit = 0; transmit_audit_endpoint(e); ast_verbose(VERBOSE_PREFIX_3 "MGCP Auditing endpoint %s@%s for hookstate\n", e->name, g->name); e = e->next; } g = g->next; } return 0; } /*! \brief load_module: PBX load module - initialization ---*/ static int load_module(void) { if (!(sched = sched_context_create())) { ast_log(LOG_WARNING, "Unable to create schedule context\n"); return AST_MODULE_LOAD_FAILURE; } if (!(io = io_context_create())) { ast_log(LOG_WARNING, "Unable to create I/O context\n"); sched_context_destroy(sched); return AST_MODULE_LOAD_FAILURE; } if (reload_config()) return AST_MODULE_LOAD_DECLINE; /* Make sure we can register our mgcp channel type */ if (ast_channel_register(&mgcp_tech)) { ast_log(LOG_ERROR, "Unable to register channel class 'MGCP'\n"); io_context_destroy(io); sched_context_destroy(sched); return AST_MODULE_LOAD_FAILURE; } ast_rtp_proto_register(&mgcp_rtp); ast_cli_register_multiple(cli_mgcp, sizeof(cli_mgcp) / sizeof(struct ast_cli_entry)); /* And start the monitor for the first time */ restart_monitor(); return AST_MODULE_LOAD_SUCCESS; } /*! \brief mgcp_do_reload: Reload module */ static int mgcp_do_reload(void) { reload_config(); return 0; } static int mgcp_reload(int fd, int argc, char *argv[]) { static int deprecated = 0; if (!deprecated && argc > 0) { ast_log(LOG_WARNING, "'mgcp reload' is deprecated. Please use 'reload chan_mgcp.so' instead.\n"); deprecated = 1; } ast_mutex_lock(&mgcp_reload_lock); if (mgcp_reloading) { ast_verbose("Previous mgcp reload not yet done\n"); } else mgcp_reloading = 1; ast_mutex_unlock(&mgcp_reload_lock); restart_monitor(); return 0; } static int reload(void) { mgcp_reload(0, 0, NULL); return 0; } static int unload_module(void) { struct mgcp_endpoint *e; struct mgcp_gateway *g; /* Check to see if we're reloading */ if (ast_mutex_trylock(&mgcp_reload_lock)) { ast_log(LOG_WARNING, "MGCP is currently reloading. Unable to remove module.\n"); return -1; } else { mgcp_reloading = 1; ast_mutex_unlock(&mgcp_reload_lock); } /* First, take us out of the channel loop */ ast_channel_unregister(&mgcp_tech); /* Shut down the monitoring thread */ if (!ast_mutex_lock(&monlock)) { if (monitor_thread && (monitor_thread != AST_PTHREADT_STOP)) { pthread_cancel(monitor_thread); pthread_kill(monitor_thread, SIGURG); pthread_join(monitor_thread, NULL); } monitor_thread = AST_PTHREADT_STOP; ast_mutex_unlock(&monlock); } else { ast_log(LOG_WARNING, "Unable to lock the monitor\n"); /* We always want to leave this in a consistent state */ ast_channel_register(&mgcp_tech); mgcp_reloading = 0; mgcp_reload(0, 0, NULL); return -1; } if (!ast_mutex_lock(&gatelock)) { for (g = gateways; g; g = g->next) { g->delme = 1; for (e = g->endpoints; e; e = e->next) e->delme = 1; } prune_gateways(); ast_mutex_unlock(&gatelock); } else { ast_log(LOG_WARNING, "Unable to lock the gateways list.\n"); /* We always want to leave this in a consistent state */ ast_channel_register(&mgcp_tech); /* Allow the monitor to restart */ monitor_thread = AST_PTHREADT_NULL; mgcp_reloading = 0; mgcp_reload(0, 0, NULL); return -1; } close(mgcpsock); ast_rtp_proto_unregister(&mgcp_rtp); ast_cli_unregister_multiple(cli_mgcp, sizeof(cli_mgcp) / sizeof(struct ast_cli_entry)); sched_context_destroy(sched); return 0; } AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Media Gateway Control Protocol (MGCP)", .load = load_module, .unload = unload_module, .reload = reload, );