/* * 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 Inter-Asterisk eXchange Version 2 * * \author Mark Spencer * * \par See also * \arg \ref Config_iax * * \ingroup channel_drivers */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IAX_TRUNKING #include #ifdef __linux__ #include #else #include #endif /* __linux__ */ #endif #include "asterisk.h" ASTERISK_FILE_VERSION(__FILE__, "Revision: 16617 ") #include "asterisk/lock.h" #include "asterisk/frame.h" #include "asterisk/channel.h" #include "asterisk/logger.h" #include "asterisk/module.h" #include "asterisk/pbx.h" #include "asterisk/sched.h" #include "asterisk/io.h" #include "asterisk/config.h" #include "asterisk/options.h" #include "asterisk/cli.h" #include "asterisk/translate.h" #include "asterisk/md5.h" #include "asterisk/cdr.h" #include "asterisk/crypto.h" #include "asterisk/acl.h" #include "asterisk/manager.h" #include "asterisk/callerid.h" #include "asterisk/app.h" #include "asterisk/astdb.h" #include "asterisk/musiconhold.h" #include "asterisk/features.h" #include "asterisk/utils.h" #include "asterisk/causes.h" #include "asterisk/localtime.h" #include "asterisk/aes.h" #include "asterisk/dnsmgr.h" #include "asterisk/devicestate.h" #include "asterisk/netsock.h" #include "asterisk/stringfields.h" #include "iax2.h" #include "iax2-parser.h" #include "iax2-provision.h" /* Define NEWJB to use the new channel independent jitterbuffer, * otherwise, use the old jitterbuffer */ #define NEWJB /* Define SCHED_MULTITHREADED to run the scheduler in a special multithreaded mode. */ #define SCHED_MULTITHREADED /* Define DEBUG_SCHED_MULTITHREADED to keep track of where each thread is actually doing. */ #define DEBUG_SCHED_MULTITHREAD #ifdef NEWJB #include "../jitterbuf.h" #endif #ifndef IPTOS_MINCOST #define IPTOS_MINCOST 0x02 #endif #ifdef SO_NO_CHECK static int nochecksums = 0; #endif /* * Uncomment to try experimental IAX bridge optimization, * designed to reduce latency when IAX calls cannot * be trasnferred -- obsolete */ /* #define BRIDGE_OPTIMIZATION */ #define PTR_TO_CALLNO(a) ((unsigned short)(unsigned long)(a)) #define CALLNO_TO_PTR(a) ((void *)(unsigned long)(a)) #define DEFAULT_THREAD_COUNT 10 #define DEFAULT_RETRY_TIME 1000 #define MEMORY_SIZE 100 #define DEFAULT_DROP 3 /* Flag to use with trunk calls, keeping these calls high up. It halves our effective use but keeps the division between trunked and non-trunked better. */ #define TRUNK_CALL_START 0x4000 #define DEBUG_SUPPORT #define MIN_REUSE_TIME 60 /* Don't reuse a call number within 60 seconds */ /* Sample over last 100 units to determine historic jitter */ #define GAMMA (0.01) static struct ast_codec_pref prefs; static const char desc[] = "Inter Asterisk eXchange (Ver 2)"; static const char tdesc[] = "Inter Asterisk eXchange Driver (Ver 2)"; static char context[80] = "default"; static char language[MAX_LANGUAGE] = ""; static char regcontext[AST_MAX_CONTEXT] = ""; static int max_retries = 4; static int ping_time = 20; static int lagrq_time = 10; static int maxtrunkcall = TRUNK_CALL_START; static int maxnontrunkcall = 1; static int maxjitterbuffer=1000; #ifdef NEWJB static int resyncthreshold=1000; static int maxjitterinterps=10; #endif static int jittershrinkrate=2; static int trunkfreq = 20; static int authdebug = 1; static int autokill = 0; static int iaxcompat = 0; static int iaxdefaultdpcache=10 * 60; /* Cache dialplan entries for 10 minutes by default */ static int iaxdefaulttimeout = 5; /* Default to wait no more than 5 seconds for a reply to come back */ static int tos = 0; static int min_reg_expire; static int max_reg_expire; static int timingfd = -1; /* Timing file descriptor */ static struct ast_netsock_list *netsock; static int defaultsockfd = -1; static int usecnt; AST_MUTEX_DEFINE_STATIC(usecnt_lock); int (*iax2_regfunk)(char *username, int onoff) = NULL; /* Ethernet, etc */ #define IAX_CAPABILITY_FULLBANDWIDTH 0xFFFF /* T1, maybe ISDN */ #define IAX_CAPABILITY_MEDBANDWIDTH (IAX_CAPABILITY_FULLBANDWIDTH & \ ~AST_FORMAT_SLINEAR & \ ~AST_FORMAT_ULAW & \ ~AST_FORMAT_ALAW) /* A modem */ #define IAX_CAPABILITY_LOWBANDWIDTH (IAX_CAPABILITY_MEDBANDWIDTH & \ ~AST_FORMAT_G726 & \ ~AST_FORMAT_ADPCM) #define IAX_CAPABILITY_LOWFREE (IAX_CAPABILITY_LOWBANDWIDTH & \ ~AST_FORMAT_G723_1) #define DEFAULT_MAXMS 2000 /* Must be faster than 2 seconds by default */ #define DEFAULT_FREQ_OK 60 * 1000 /* How often to check for the host to be up */ #define DEFAULT_FREQ_NOTOK 10 * 1000 /* How often to check, if the host is down... */ static struct io_context *io; static struct sched_context *sched; static int iax2_capability = IAX_CAPABILITY_FULLBANDWIDTH; static int iax2_dropcount = DEFAULT_DROP; static int iaxdebug = 0; static int iaxtrunkdebug = 0; static int test_losspct = 0; #ifdef IAXTESTS static int test_late = 0; static int test_resync = 0; static int test_jit = 0; static int test_jitpct = 0; #endif /* IAXTESTS */ static char accountcode[AST_MAX_ACCOUNT_CODE]; static int amaflags = 0; static int delayreject = 0; static int iax2_encryption = 0; static struct ast_flags globalflags = { 0 }; static pthread_t netthreadid = AST_PTHREADT_NULL; static pthread_t schedthreadid = AST_PTHREADT_NULL; AST_MUTEX_DEFINE_STATIC(sched_lock); static int sched_halt = 0; static ast_cond_t sched_cond; enum { IAX_STATE_STARTED = (1 << 0), IAX_STATE_AUTHENTICATED = (1 << 1), IAX_STATE_TBD = (1 << 2), IAX_STATE_UNCHANGED = (1 << 3), } iax2_state; struct iax2_context { char context[AST_MAX_CONTEXT]; struct iax2_context *next; }; enum { IAX_HASCALLERID = (1 << 0), /*!< CallerID has been specified */ IAX_DELME = (1 << 1), /*!< Needs to be deleted */ IAX_TEMPONLY = (1 << 2), /*!< Temporary (realtime) */ IAX_TRUNK = (1 << 3), /*!< Treat as a trunk */ IAX_NOTRANSFER = (1 << 4), /*!< Don't native bridge */ IAX_USEJITTERBUF = (1 << 5), /*!< Use jitter buffer */ IAX_DYNAMIC = (1 << 6), /*!< dynamic peer */ IAX_SENDANI = (1 << 7), /*!< Send ANI along with CallerID */ /* (1 << 8) is currently unused due to the deprecation of an old option. Go ahead, take it! */ IAX_ALREADYGONE = (1 << 9), /*!< Already disconnected */ IAX_PROVISION = (1 << 10), /*!< This is a provisioning request */ IAX_QUELCH = (1 << 11), /*!< Whether or not we quelch audio */ IAX_ENCRYPTED = (1 << 12), /*!< Whether we should assume encrypted tx/rx */ IAX_KEYPOPULATED = (1 << 13), /*!< Whether we have a key populated */ IAX_CODEC_USER_FIRST = (1 << 14), /*!< are we willing to let the other guy choose the codec? */ IAX_CODEC_NOPREFS = (1 << 15), /*!< Force old behaviour by turning off prefs */ IAX_CODEC_NOCAP = (1 << 16), /*!< only consider requested format and ignore capabilities*/ IAX_RTCACHEFRIENDS = (1 << 17), /*!< let realtime stay till your reload */ IAX_RTUPDATE = (1 << 18), /*!< Send a realtime update */ IAX_RTAUTOCLEAR = (1 << 19), /*!< erase me on expire */ IAX_FORCEJITTERBUF = (1 << 20), /*!< Force jitterbuffer, even when bridged to a channel that can take jitter */ IAX_RTIGNOREREGEXPIRE = (1 << 21), /*!< When using realtime, ignore registration expiration */ IAX_TRUNKTIMESTAMPS = (1 << 22) /*!< Send trunk timestamps */ } iax2_flags; static int global_rtautoclear = 120; static int reload_config(void); static int iax2_reload(int fd, int argc, char *argv[]); struct iax2_user { char name[80]; char secret[80]; char dbsecret[80]; int authmethods; int encmethods; char accountcode[AST_MAX_ACCOUNT_CODE]; char inkeys[80]; /*!< Key(s) this user can use to authenticate to us */ char language[MAX_LANGUAGE]; int amaflags; unsigned int flags; int capability; char cid_num[AST_MAX_EXTENSION]; char cid_name[AST_MAX_EXTENSION]; struct ast_codec_pref prefs; struct ast_ha *ha; struct iax2_context *contexts; struct iax2_user *next; struct ast_variable *vars; }; struct iax2_peer { char name[80]; char username[80]; char secret[80]; char dbsecret[80]; char outkey[80]; /*!< What key we use to talk to this peer */ char context[AST_MAX_CONTEXT]; /*!< For transfers only */ char regexten[AST_MAX_EXTENSION]; /*!< Extension to register (if regcontext is used) */ char peercontext[AST_MAX_EXTENSION]; /*!< Context to pass to peer */ char mailbox[AST_MAX_EXTENSION]; /*!< Mailbox */ struct ast_codec_pref prefs; struct ast_dnsmgr_entry *dnsmgr; /*!< DNS refresh manager */ struct sockaddr_in addr; int formats; int sockfd; /*!< Socket to use for transmission */ struct in_addr mask; unsigned int flags; /* Dynamic Registration fields */ struct sockaddr_in defaddr; /*!< Default address if there is one */ int authmethods; /*!< Authentication methods (IAX_AUTH_*) */ int encmethods; /*!< Encryption methods (IAX_ENCRYPT_*) */ char inkeys[80]; /*!< Key(s) this peer can use to authenticate to us */ /* Suggested caller id if registering */ char cid_num[AST_MAX_EXTENSION]; /*!< Default context (for transfer really) */ char cid_name[AST_MAX_EXTENSION]; /*!< Default context (for transfer really) */ int expire; /*!< Schedule entry for expiry */ int expiry; /*!< How soon to expire */ int capability; /*!< Capability */ char zonetag[80]; /*!< Time Zone */ /* Qualification */ int callno; /*!< Call number of POKE request */ int pokeexpire; /*!< When to expire poke */ int lastms; /*!< How long last response took (in ms), or -1 for no response */ int maxms; /*!< Max ms we will accept for the host to be up, 0 to not monitor */ int pokefreqok; /*!< How often to check if the host is up */ int pokefreqnotok; /*!< How often to check when the host has been determined to be down */ int historicms; /*!< How long recent average responses took */ int smoothing; /*!< Sample over how many units to determine historic ms */ struct ast_ha *ha; struct iax2_peer *next; }; #define IAX2_TRUNK_PREFACE (sizeof(struct iax_frame) + sizeof(struct ast_iax2_meta_hdr) + sizeof(struct ast_iax2_meta_trunk_hdr)) static struct iax2_trunk_peer { ast_mutex_t lock; int sockfd; struct sockaddr_in addr; struct timeval txtrunktime; /*!< Transmit trunktime */ struct timeval rxtrunktime; /*!< Receive trunktime */ struct timeval lasttxtime; /*!< Last transmitted trunktime */ struct timeval trunkact; /*!< Last trunk activity */ unsigned int lastsent; /*!< Last sent time */ /* Trunk data and length */ unsigned char *trunkdata; unsigned int trunkdatalen; unsigned int trunkdataalloc; struct iax2_trunk_peer *next; int trunkerror; int calls; } *tpeers = NULL; AST_MUTEX_DEFINE_STATIC(tpeerlock); struct iax_firmware { struct iax_firmware *next; int fd; int mmaplen; int dead; struct ast_iax2_firmware_header *fwh; unsigned char *buf; }; enum iax_reg_state { REG_STATE_UNREGISTERED = 0, REG_STATE_REGSENT, REG_STATE_AUTHSENT, REG_STATE_REGISTERED, REG_STATE_REJECTED, REG_STATE_TIMEOUT, REG_STATE_NOAUTH }; enum iax_transfer_state { TRANSFER_NONE = 0, TRANSFER_BEGIN, TRANSFER_READY, TRANSFER_RELEASED, TRANSFER_PASSTHROUGH }; struct iax2_registry { struct sockaddr_in addr; /*!< Who we connect to for registration purposes */ char username[80]; char secret[80]; /*!< Password or key name in []'s */ char random[80]; int expire; /*!< Sched ID of expiration */ int refresh; /*!< How often to refresh */ enum iax_reg_state regstate; int messages; /*!< Message count */ int callno; /*!< Associated call number if applicable */ struct sockaddr_in us; /*!< Who the server thinks we are */ struct iax2_registry *next; }; static struct iax2_registry *registrations; /* Don't retry more frequently than every 10 ms, or less frequently than every 5 seconds */ #define MIN_RETRY_TIME 100 #define MAX_RETRY_TIME 10000 #define MAX_JITTER_BUFFER 50 #define MIN_JITTER_BUFFER 10 #define DEFAULT_TRUNKDATA 640 * 10 /*!< 40ms, uncompressed linear * 10 channels */ #define MAX_TRUNKDATA 640 * 200 /*!< 40ms, uncompressed linear * 200 channels */ #define MAX_TIMESTAMP_SKEW 160 /*!< maximum difference between actual and predicted ts for sending */ /* If consecutive voice frame timestamps jump by more than this many milliseconds, then jitter buffer will resync */ #define TS_GAP_FOR_JB_RESYNC 5000 /* If we have more than this much excess real jitter buffer, shrink it. */ static int max_jitter_buffer = MAX_JITTER_BUFFER; /* If we have less than this much excess real jitter buffer, enlarge it. */ static int min_jitter_buffer = MIN_JITTER_BUFFER; static int iaxthreadcount = DEFAULT_THREAD_COUNT; struct iax_rr { int jitter; int losspct; int losscnt; int packets; int delay; int dropped; int ooo; }; struct chan_iax2_pvt { /*! Socket to send/receive on for this call */ int sockfd; /*! Last received voice format */ int voiceformat; /*! Last received video format */ int videoformat; /*! Last sent voice format */ int svoiceformat; /*! Last sent video format */ int svideoformat; /*! What we are capable of sending */ int capability; /*! Last received timestamp */ unsigned int last; /*! Last sent timestamp - never send the same timestamp twice in a single call */ unsigned int lastsent; /*! Next outgoing timestamp if everything is good */ unsigned int nextpred; /*! True if the last voice we transmitted was not silence/CNG */ int notsilenttx; /*! Ping time */ unsigned int pingtime; /*! Max time for initial response */ int maxtime; /*! Peer Address */ struct sockaddr_in addr; struct ast_codec_pref prefs; /*! Our call number */ unsigned short callno; /*! Peer callno */ unsigned short peercallno; /*! Peer selected format */ int peerformat; /*! Peer capability */ int peercapability; /*! timeval that we base our transmission on */ struct timeval offset; /*! timeval that we base our delivery on */ struct timeval rxcore; #ifdef NEWJB /*! The jitterbuffer */ jitterbuf *jb; /*! active jb read scheduler id */ int jbid; #else /*! Historical delivery time */ int history[MEMORY_SIZE]; /*! Current base jitterbuffer */ int jitterbuffer; /*! Current jitter measure */ int jitter; /*! Historic jitter value */ int historicjitter; #endif /*! LAG */ int lag; /*! Error, as discovered by the manager */ int error; /*! Owner if we have one */ struct ast_channel *owner; /*! What's our state? */ struct ast_flags state; /*! Expiry (optional) */ int expiry; /*! Next outgoing sequence number */ unsigned char oseqno; /*! Next sequence number they have not yet acknowledged */ unsigned char rseqno; /*! Next incoming sequence number */ unsigned char iseqno; /*! Last incoming sequence number we have acknowledged */ unsigned char aseqno; /*! Peer name */ char peer[80]; /*! Default Context */ char context[80]; /*! Caller ID if available */ char cid_num[80]; char cid_name[80]; /*! Hidden Caller ID (i.e. ANI) if appropriate */ char ani[80]; /*! DNID */ char dnid[80]; /*! RDNIS */ char rdnis[80]; /*! Requested Extension */ char exten[AST_MAX_EXTENSION]; /*! Expected Username */ char username[80]; /*! Expected Secret */ char secret[80]; /*! permitted authentication methods */ int authmethods; /*! permitted encryption methods */ int encmethods; /*! MD5 challenge */ char challenge[10]; /*! Public keys permitted keys for incoming authentication */ char inkeys[80]; /*! Private key for outgoing authentication */ char outkey[80]; /*! Encryption AES-128 Key */ aes_encrypt_ctx ecx; /*! Decryption AES-128 Key */ aes_decrypt_ctx dcx; /*! 32 bytes of semi-random data */ unsigned char semirand[32]; /*! Preferred language */ char language[MAX_LANGUAGE]; /*! Hostname/peername for naming purposes */ char host[80]; /*! Associated registry */ struct iax2_registry *reg; /*! Associated peer for poking */ struct iax2_peer *peerpoke; /*! IAX_ flags */ unsigned int flags; /*! Transferring status */ enum iax_transfer_state transferring; /*! Transfer identifier */ int transferid; /*! Who we are IAX transfering to */ struct sockaddr_in transfer; /*! What's the new call number for the transfer */ unsigned short transfercallno; /*! Transfer decrypt AES-128 Key */ aes_encrypt_ctx tdcx; /*! Status of knowledge of peer ADSI capability */ int peeradsicpe; /*! Who we are bridged to */ unsigned short bridgecallno; unsigned int bridgesfmt; struct ast_trans_pvt *bridgetrans; int pingid; /*!< Transmit PING request */ int lagid; /*!< Retransmit lag request */ int autoid; /*!< Auto hangup for Dialplan requestor */ int authid; /*!< Authentication rejection ID */ int authfail; /*!< Reason to report failure */ int initid; /*!< Initial peer auto-congest ID (based on qualified peers) */ int calling_ton; int calling_tns; int calling_pres; char dproot[AST_MAX_EXTENSION]; char accountcode[AST_MAX_ACCOUNT_CODE]; int amaflags; struct iax2_dpcache *dpentries; struct ast_variable *vars; /*! last received remote rr */ struct iax_rr remote_rr; /*! Current base time: (just for stats) */ int min; /*! Dropped frame count: (just for stats) */ int frames_dropped; /*! received frame count: (just for stats) */ int frames_received; }; static struct ast_iax2_queue { struct iax_frame *head; struct iax_frame *tail; int count; ast_mutex_t lock; } iaxq; static struct ast_user_list { struct iax2_user *users; ast_mutex_t lock; } userl; static struct ast_peer_list { struct iax2_peer *peers; ast_mutex_t lock; } peerl; static struct ast_firmware_list { struct iax_firmware *wares; ast_mutex_t lock; } waresl; /*! Extension exists */ #define CACHE_FLAG_EXISTS (1 << 0) /*! Extension is nonexistent */ #define CACHE_FLAG_NONEXISTENT (1 << 1) /*! Extension can exist */ #define CACHE_FLAG_CANEXIST (1 << 2) /*! Waiting to hear back response */ #define CACHE_FLAG_PENDING (1 << 3) /*! Timed out */ #define CACHE_FLAG_TIMEOUT (1 << 4) /*! Request transmitted */ #define CACHE_FLAG_TRANSMITTED (1 << 5) /*! Timeout */ #define CACHE_FLAG_UNKNOWN (1 << 6) /*! Matchmore */ #define CACHE_FLAG_MATCHMORE (1 << 7) static struct iax2_dpcache { char peercontext[AST_MAX_CONTEXT]; char exten[AST_MAX_EXTENSION]; struct timeval orig; struct timeval expiry; int flags; unsigned short callno; int waiters[256]; struct iax2_dpcache *next; struct iax2_dpcache *peer; /*!< For linking in peers */ } *dpcache; AST_MUTEX_DEFINE_STATIC(dpcache_lock); static void reg_source_db(struct iax2_peer *p); static struct iax2_peer *realtime_peer(const char *peername, struct sockaddr_in *sin); static void destroy_peer(struct iax2_peer *peer); static int ast_cli_netstats(struct mansession *s, int fd, int limit_fmt); #define IAX_IOSTATE_IDLE 0 #define IAX_IOSTATE_READY 1 #define IAX_IOSTATE_PROCESSING 2 #define IAX_IOSTATE_SCHEDREADY 3 struct iax2_thread { ASTOBJ_COMPONENTS(struct iax2_thread); int iostate; #ifdef SCHED_MULTITHREADED void (*schedfunc)(void *); void *scheddata; #endif #ifdef DEBUG_SCHED_MULTITHREAD char curfunc[80]; #endif int actions; int halt; pthread_t threadid; int threadnum; struct sockaddr_in iosin; unsigned char buf[4096]; int iores; int iofd; time_t checktime; ast_mutex_t lock; ast_cond_t cond; }; struct iax2_thread_list { ASTOBJ_CONTAINER_COMPONENTS(struct iax2_thread); }; static struct iax2_thread_list idlelist, activelist; static void signal_condition(ast_mutex_t *lock, ast_cond_t *cond) { ast_mutex_lock(lock); ast_cond_signal(cond); ast_mutex_unlock(lock); } static void iax_debug_output(const char *data) { if (iaxdebug) ast_verbose("%s", data); } static void iax_error_output(const char *data) { ast_log(LOG_WARNING, "%s", data); } #ifdef NEWJB static void jb_error_output(const char *fmt, ...) { va_list args; char buf[1024]; va_start(args, fmt); vsnprintf(buf, 1024, fmt, args); va_end(args); ast_log(LOG_ERROR, buf); } static void jb_warning_output(const char *fmt, ...) { va_list args; char buf[1024]; va_start(args, fmt); vsnprintf(buf, 1024, fmt, args); va_end(args); ast_log(LOG_WARNING, buf); } static void jb_debug_output(const char *fmt, ...) { va_list args; char buf[1024]; va_start(args, fmt); vsnprintf(buf, 1024, fmt, args); va_end(args); ast_verbose(buf); } #endif /* XXX We probably should use a mutex when working with this XXX */ static struct chan_iax2_pvt *iaxs[IAX_MAX_CALLS]; static ast_mutex_t iaxsl[IAX_MAX_CALLS]; static struct timeval lastused[IAX_MAX_CALLS]; static int send_command(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int); static int send_command_locked(unsigned short callno, char, int, unsigned int, const unsigned char *, int, int); static int send_command_immediate(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int); static int send_command_final(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int, int); static int send_command_transfer(struct chan_iax2_pvt *, char, int, unsigned int, const unsigned char *, int); static struct iax2_user *build_user(const char *name, struct ast_variable *v, int temponly); static void destroy_user(struct iax2_user *user); static int expire_registry(void *data); static int iax2_write(struct ast_channel *c, struct ast_frame *f); static int iax2_do_register(struct iax2_registry *reg); static void prune_peers(void); static int iax2_poke_peer(struct iax2_peer *peer, int heldcall); static int iax2_provision(struct sockaddr_in *end, int sockfd, char *dest, const char *template, int force); static struct ast_channel *iax2_request(const char *type, int format, void *data, int *cause); static int iax2_devicestate(void *data); static int iax2_digit(struct ast_channel *c, char digit); static int iax2_sendtext(struct ast_channel *c, const char *text); static int iax2_sendimage(struct ast_channel *c, struct ast_frame *img); static int iax2_sendhtml(struct ast_channel *c, int subclass, const char *data, int datalen); static int iax2_call(struct ast_channel *c, char *dest, int timeout); static int iax2_hangup(struct ast_channel *c); static int iax2_answer(struct ast_channel *c); static struct ast_frame *iax2_read(struct ast_channel *c); static int iax2_write(struct ast_channel *c, struct ast_frame *f); static int iax2_indicate(struct ast_channel *c, int condition); static int iax2_setoption(struct ast_channel *c, int option, void *data, int datalen); static enum ast_bridge_result iax2_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms); static int iax2_transfer(struct ast_channel *c, const char *dest); static int iax2_fixup(struct ast_channel *oldchannel, struct ast_channel *newchan); static const struct ast_channel_tech iax2_tech = { .type = "IAX2", .description = tdesc, .capabilities = IAX_CAPABILITY_FULLBANDWIDTH, .properties = AST_CHAN_TP_WANTSJITTER, .requester = iax2_request, .devicestate = iax2_devicestate, .send_digit = iax2_digit, .send_text = iax2_sendtext, .send_image = iax2_sendimage, .send_html = iax2_sendhtml, .call = iax2_call, .hangup = iax2_hangup, .answer = iax2_answer, .read = iax2_read, .write = iax2_write, .write_video = iax2_write, .indicate = iax2_indicate, .setoption = iax2_setoption, .bridge = iax2_bridge, .transfer = iax2_transfer, .fixup = iax2_fixup, }; static struct iax2_thread *find_idle_thread(void) { struct iax2_thread *thread; thread = ASTOBJ_CONTAINER_UNLINK_START(&idlelist); return thread; } #ifdef SCHED_MULTITHREADED static int __schedule_action(void (*func)(void *data), void *data, const char *funcname) { struct iax2_thread *thread; static time_t lasterror; static time_t t; thread = find_idle_thread(); if (thread) { thread->schedfunc = func; thread->scheddata = data; thread->iostate = IAX_IOSTATE_SCHEDREADY; #ifdef DEBUG_SCHED_MULTITHREAD ast_copy_string(thread->curfunc, funcname, sizeof(thread->curfunc)); #endif signal_condition(&thread->lock, &thread->cond); return 0; } time(&t); if (t != lasterror) ast_log(LOG_NOTICE, "Out of idle IAX2 threads for scheduling!\n"); lasterror = t; return -1; } #define schedule_action(func, data) __schedule_action(func, data, __PRETTY_FUNCTION__) #endif static void __send_ping(void *data) { int callno = (long)data; send_command(iaxs[callno], AST_FRAME_IAX, IAX_COMMAND_PING, 0, NULL, 0, -1); } static int send_ping(void *data) { int callno = (long)data; if (iaxs[callno]) { #ifdef BRIDGE_OPTIMIZATION if (!iaxs[callno]->bridgecallno) #endif { #ifdef SCHED_MULTITHREADED if (schedule_action(__send_ping, data)) #endif __send_ping(data); } return 1; } else return 0; return 0; } static int get_encrypt_methods(const char *s) { int e; if (!strcasecmp(s, "aes128")) e = IAX_ENCRYPT_AES128; else if (ast_true(s)) e = IAX_ENCRYPT_AES128; else e = 0; return e; } static void __send_lagrq(void *data) { int callno = (long)data; /* Ping only if it's real not if it's bridged */ send_command(iaxs[callno], AST_FRAME_IAX, IAX_COMMAND_LAGRQ, 0, NULL, 0, -1); } static int send_lagrq(void *data) { int callno = (long)data; if (iaxs[callno]) { #ifdef BRIDGE_OPTIMIZATION if (!iaxs[callno]->bridgecallno) #endif { #ifdef SCHED_MULTITHREADED if (schedule_action(__send_lagrq, data)) #endif __send_lagrq(data); } return 1; } else return 0; return 0; } static unsigned char compress_subclass(int subclass) { int x; int power=-1; /* If it's 128 or smaller, just return it */ if (subclass < IAX_FLAG_SC_LOG) return subclass; /* Otherwise find its power */ for (x = 0; x < IAX_MAX_SHIFT; x++) { if (subclass & (1 << x)) { if (power > -1) { ast_log(LOG_WARNING, "Can't compress subclass %d\n", subclass); return 0; } else power = x; } } return power | IAX_FLAG_SC_LOG; } static int uncompress_subclass(unsigned char csub) { /* If the SC_LOG flag is set, return 2^csub otherwise csub */ if (csub & IAX_FLAG_SC_LOG) { /* special case for 'compressed' -1 */ if (csub == 0xff) return -1; else return 1 << (csub & ~IAX_FLAG_SC_LOG & IAX_MAX_SHIFT); } else return csub; } static struct iax2_peer *find_peer(const char *name, int realtime) { struct iax2_peer *peer; ast_mutex_lock(&peerl.lock); for(peer = peerl.peers; peer; peer = peer->next) { if (!strcasecmp(peer->name, name)) { break; } } ast_mutex_unlock(&peerl.lock); if(!peer && realtime) peer = realtime_peer(name, NULL); return peer; } static int iax2_getpeername(struct sockaddr_in sin, char *host, int len, int lockpeer) { struct iax2_peer *peer; int res = 0; if (lockpeer) ast_mutex_lock(&peerl.lock); peer = peerl.peers; while (peer) { if ((peer->addr.sin_addr.s_addr == sin.sin_addr.s_addr) && (peer->addr.sin_port == sin.sin_port)) { ast_copy_string(host, peer->name, len); res = 1; break; } peer = peer->next; } if (lockpeer) ast_mutex_unlock(&peerl.lock); if (!peer) { peer = realtime_peer(NULL, &sin); if (peer) { ast_copy_string(host, peer->name, len); if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); res = 1; } } return res; } static struct chan_iax2_pvt *new_iax(struct sockaddr_in *sin, int lockpeer, const char *host) { struct chan_iax2_pvt *tmp; if (!(tmp = ast_calloc(1, sizeof(*tmp)))) return NULL; tmp->prefs = prefs; tmp->callno = 0; tmp->peercallno = 0; tmp->transfercallno = 0; tmp->bridgecallno = 0; tmp->pingid = -1; tmp->lagid = -1; tmp->autoid = -1; tmp->authid = -1; tmp->initid = -1; /* ast_copy_string(tmp->context, context, sizeof(tmp->context)); */ ast_copy_string(tmp->exten, "s", sizeof(tmp->exten)); ast_copy_string(tmp->host, host, sizeof(tmp->host)); #ifdef NEWJB { jb_conf jbconf; tmp->jb = jb_new(); tmp->jbid = -1; jbconf.max_jitterbuf = maxjitterbuffer; jbconf.resync_threshold = resyncthreshold; jbconf.max_contig_interp = maxjitterinterps; jb_setconf(tmp->jb,&jbconf); } #endif return tmp; } static struct iax_frame *iaxfrdup2(struct iax_frame *fr) { /* Malloc() a copy of a frame */ struct iax_frame *new = iax_frame_new(DIRECTION_INGRESS, fr->af.datalen); if (new) { memcpy(new, fr, sizeof(struct iax_frame)); iax_frame_wrap(new, &fr->af); new->data = NULL; new->datalen = 0; new->direction = DIRECTION_INGRESS; new->retrans = -1; } return new; } #define NEW_PREVENT 0 #define NEW_ALLOW 1 #define NEW_FORCE 2 static int match(struct sockaddr_in *sin, unsigned short callno, unsigned short dcallno, struct chan_iax2_pvt *cur) { if ((cur->addr.sin_addr.s_addr == sin->sin_addr.s_addr) && (cur->addr.sin_port == sin->sin_port)) { /* This is the main host */ if ((cur->peercallno == callno) || ((dcallno == cur->callno) && !cur->peercallno)) { /* That's us. Be sure we keep track of the peer call number */ return 1; } } if ((cur->transfer.sin_addr.s_addr == sin->sin_addr.s_addr) && (cur->transfer.sin_port == sin->sin_port) && (cur->transferring)) { /* We're transferring */ if (dcallno == cur->callno) return 1; } return 0; } static void update_max_trunk(void) { int max = TRUNK_CALL_START; int x; /* XXX Prolly don't need locks here XXX */ for (x=TRUNK_CALL_START;xoseqno) { ast_log(LOG_WARNING, "Can't make trunk once a call has started!\n"); return -1; } if (callno & TRUNK_CALL_START) { ast_log(LOG_WARNING, "Call %d is already a trunk\n", callno); return -1; } gettimeofday(&now, NULL); for (x=TRUNK_CALL_START;x MIN_REUSE_TIME)) { iaxs[x] = iaxs[callno]; iaxs[x]->callno = x; iaxs[callno] = NULL; /* Update the two timers that should have been started */ if (iaxs[x]->pingid > -1) ast_sched_del(sched, iaxs[x]->pingid); if (iaxs[x]->lagid > -1) ast_sched_del(sched, iaxs[x]->lagid); iaxs[x]->pingid = ast_sched_add(sched, ping_time * 1000, send_ping, (void *)(long)x); iaxs[x]->lagid = ast_sched_add(sched, lagrq_time * 1000, send_lagrq, (void *)(long)x); if (locked) ast_mutex_unlock(&iaxsl[callno]); res = x; if (!locked) ast_mutex_unlock(&iaxsl[x]); break; } ast_mutex_unlock(&iaxsl[x]); } if (x >= IAX_MAX_CALLS - 1) { ast_log(LOG_WARNING, "Unable to trunk call: Insufficient space\n"); return -1; } ast_log(LOG_DEBUG, "Made call %d into trunk call %d\n", callno, x); /* We move this call from a non-trunked to a trunked call */ update_max_trunk(); update_max_nontrunk(); return res; } static int find_callno(unsigned short callno, unsigned short dcallno, struct sockaddr_in *sin, int new, int lockpeer, int sockfd) { int res = 0; int x; struct timeval now; char iabuf[INET_ADDRSTRLEN]; char host[80]; if (new <= NEW_ALLOW) { /* Look for an existing connection first */ for (x=1;(res < 1) && (x= NEW_ALLOW)) { if (!iax2_getpeername(*sin, host, sizeof(host), lockpeer)) snprintf(host, sizeof(host), "%s:%d", ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr), ntohs(sin->sin_port)); gettimeofday(&now, NULL); for (x=1;x MIN_REUSE_TIME)) break; ast_mutex_unlock(&iaxsl[x]); } /* We've still got lock held if we found a spot */ if (x >= TRUNK_CALL_START) { ast_log(LOG_WARNING, "No more space\n"); return 0; } iaxs[x] = new_iax(sin, lockpeer, host); update_max_nontrunk(); if (iaxs[x]) { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Creating new call structure %d\n", x); iaxs[x]->sockfd = sockfd; iaxs[x]->addr.sin_port = sin->sin_port; iaxs[x]->addr.sin_family = sin->sin_family; iaxs[x]->addr.sin_addr.s_addr = sin->sin_addr.s_addr; iaxs[x]->peercallno = callno; iaxs[x]->callno = x; iaxs[x]->pingtime = DEFAULT_RETRY_TIME; iaxs[x]->expiry = min_reg_expire; iaxs[x]->pingid = ast_sched_add(sched, ping_time * 1000, send_ping, (void *)(long)x); iaxs[x]->lagid = ast_sched_add(sched, lagrq_time * 1000, send_lagrq, (void *)(long)x); iaxs[x]->amaflags = amaflags; ast_copy_flags(iaxs[x], (&globalflags), IAX_NOTRANSFER | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF); ast_copy_string(iaxs[x]->accountcode, accountcode, sizeof(iaxs[x]->accountcode)); } else { ast_log(LOG_WARNING, "Out of resources\n"); ast_mutex_unlock(&iaxsl[x]); return 0; } ast_mutex_unlock(&iaxsl[x]); res = x; } return res; } static void iax2_frame_free(struct iax_frame *fr) { if (fr->retrans > -1) ast_sched_del(sched, fr->retrans); iax_frame_free(fr); } static int iax2_queue_frame(int callno, struct ast_frame *f) { /* Assumes lock for callno is already held... */ for (;;) { if (iaxs[callno] && iaxs[callno]->owner) { if (ast_mutex_trylock(&iaxs[callno]->owner->lock)) { /* Avoid deadlock by pausing and trying again */ ast_mutex_unlock(&iaxsl[callno]); usleep(1); ast_mutex_lock(&iaxsl[callno]); } else { ast_queue_frame(iaxs[callno]->owner, f); ast_mutex_unlock(&iaxs[callno]->owner->lock); break; } } else break; } return 0; } static void destroy_firmware(struct iax_firmware *cur) { /* Close firmware */ if (cur->fwh) { munmap(cur->fwh, ntohl(cur->fwh->datalen) + sizeof(*(cur->fwh))); } close(cur->fd); free(cur); } static int try_firmware(char *s) { struct stat stbuf; struct iax_firmware *cur; int ifd; int fd; int res; struct ast_iax2_firmware_header *fwh, fwh2; struct MD5Context md5; unsigned char sum[16]; unsigned char buf[1024]; int len, chunk; char *s2; char *last; s2 = alloca(strlen(s) + 100); if (!s2) { ast_log(LOG_WARNING, "Alloca failed!\n"); return -1; } last = strrchr(s, '/'); if (last) last++; else last = s; snprintf(s2, strlen(s) + 100, "/var/tmp/%s-%ld", last, (unsigned long)rand()); res = stat(s, &stbuf); if (res < 0) { ast_log(LOG_WARNING, "Failed to stat '%s': %s\n", s, strerror(errno)); return -1; } /* Make sure it's not a directory */ if (S_ISDIR(stbuf.st_mode)) return -1; ifd = open(s, O_RDONLY); if (ifd < 0) { ast_log(LOG_WARNING, "Cannot open '%s': %s\n", s, strerror(errno)); return -1; } fd = open(s2, O_RDWR | O_CREAT | O_EXCL); if (fd < 0) { ast_log(LOG_WARNING, "Cannot open '%s' for writing: %s\n", s2, strerror(errno)); close(ifd); return -1; } /* Unlink our newly created file */ unlink(s2); /* Now copy the firmware into it */ len = stbuf.st_size; while(len) { chunk = len; if (chunk > sizeof(buf)) chunk = sizeof(buf); res = read(ifd, buf, chunk); if (res != chunk) { ast_log(LOG_WARNING, "Only read %d of %d bytes of data :(: %s\n", res, chunk, strerror(errno)); close(ifd); close(fd); return -1; } res = write(fd, buf, chunk); if (res != chunk) { ast_log(LOG_WARNING, "Only write %d of %d bytes of data :(: %s\n", res, chunk, strerror(errno)); close(ifd); close(fd); return -1; } len -= chunk; } close(ifd); /* Return to the beginning */ lseek(fd, 0, SEEK_SET); if ((res = read(fd, &fwh2, sizeof(fwh2))) != sizeof(fwh2)) { ast_log(LOG_WARNING, "Unable to read firmware header in '%s'\n", s); close(fd); return -1; } if (ntohl(fwh2.magic) != IAX_FIRMWARE_MAGIC) { ast_log(LOG_WARNING, "'%s' is not a valid firmware file\n", s); close(fd); return -1; } if (ntohl(fwh2.datalen) != (stbuf.st_size - sizeof(fwh2))) { ast_log(LOG_WARNING, "Invalid data length in firmware '%s'\n", s); close(fd); return -1; } if (fwh2.devname[sizeof(fwh2.devname) - 1] || ast_strlen_zero((char *)fwh2.devname)) { ast_log(LOG_WARNING, "No or invalid device type specified for '%s'\n", s); close(fd); return -1; } fwh = mmap(NULL, stbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0); if (!fwh) { ast_log(LOG_WARNING, "mmap failed: %s\n", strerror(errno)); close(fd); return -1; } MD5Init(&md5); MD5Update(&md5, fwh->data, ntohl(fwh->datalen)); MD5Final(sum, &md5); if (memcmp(sum, fwh->chksum, sizeof(sum))) { ast_log(LOG_WARNING, "Firmware file '%s' fails checksum\n", s); munmap(fwh, stbuf.st_size); close(fd); return -1; } cur = waresl.wares; while(cur) { if (!strcmp((char *)cur->fwh->devname, (char *)fwh->devname)) { /* Found a candidate */ if (cur->dead || (ntohs(cur->fwh->version) < ntohs(fwh->version))) /* The version we have on loaded is older, load this one instead */ break; /* This version is no newer than what we have. Don't worry about it. We'll consider it a proper load anyhow though */ munmap(fwh, stbuf.st_size); close(fd); return 0; } cur = cur->next; } if (!cur) { /* Allocate a new one and link it */ if ((cur = ast_calloc(1, sizeof(*cur)))) { cur->fd = -1; cur->next = waresl.wares; waresl.wares = cur; } } if (cur) { if (cur->fwh) { munmap(cur->fwh, cur->mmaplen); } if (cur->fd > -1) close(cur->fd); cur->fwh = fwh; cur->fd = fd; cur->mmaplen = stbuf.st_size; cur->dead = 0; } return 0; } static int iax_check_version(char *dev) { int res = 0; struct iax_firmware *cur; if (!ast_strlen_zero(dev)) { ast_mutex_lock(&waresl.lock); cur = waresl.wares; while(cur) { if (!strcmp(dev, (char *)cur->fwh->devname)) { res = ntohs(cur->fwh->version); break; } cur = cur->next; } ast_mutex_unlock(&waresl.lock); } return res; } static int iax_firmware_append(struct iax_ie_data *ied, const unsigned char *dev, unsigned int desc) { int res = -1; unsigned int bs = desc & 0xff; unsigned int start = (desc >> 8) & 0xffffff; unsigned int bytes; struct iax_firmware *cur; if (!ast_strlen_zero((char *)dev) && bs) { start *= bs; ast_mutex_lock(&waresl.lock); cur = waresl.wares; while(cur) { if (!strcmp((char *)dev, (char *)cur->fwh->devname)) { iax_ie_append_int(ied, IAX_IE_FWBLOCKDESC, desc); if (start < ntohl(cur->fwh->datalen)) { bytes = ntohl(cur->fwh->datalen) - start; if (bytes > bs) bytes = bs; iax_ie_append_raw(ied, IAX_IE_FWBLOCKDATA, cur->fwh->data + start, bytes); } else { bytes = 0; iax_ie_append(ied, IAX_IE_FWBLOCKDATA); } if (bytes == bs) res = 0; else res = 1; break; } cur = cur->next; } ast_mutex_unlock(&waresl.lock); } return res; } static void reload_firmware(void) { struct iax_firmware *cur, *curl, *curp; DIR *fwd; struct dirent *de; char dir[256]; char fn[256]; /* Mark all as dead */ ast_mutex_lock(&waresl.lock); cur = waresl.wares; while(cur) { cur->dead = 1; cur = cur->next; } /* Now that we've freed them, load the new ones */ snprintf(dir, sizeof(dir), "%s/firmware/iax", (char *)ast_config_AST_VAR_DIR); fwd = opendir(dir); if (fwd) { while((de = readdir(fwd))) { if (de->d_name[0] != '.') { snprintf(fn, sizeof(fn), "%s/%s", dir, de->d_name); if (!try_firmware(fn)) { if (option_verbose > 1) ast_verbose(VERBOSE_PREFIX_2 "Loaded firmware '%s'\n", de->d_name); } } } closedir(fwd); } else ast_log(LOG_WARNING, "Error opening firmware directory '%s': %s\n", dir, strerror(errno)); /* Clean up leftovers */ cur = waresl.wares; curp = NULL; while(cur) { curl = cur; cur = cur->next; if (curl->dead) { if (curp) { curp->next = cur; } else { waresl.wares = cur; } destroy_firmware(curl); } else { curp = cur; } } ast_mutex_unlock(&waresl.lock); } static int iax2_send(struct chan_iax2_pvt *pvt, struct ast_frame *f, unsigned int ts, int seqno, int now, int transfer, int final); static int __do_deliver(void *data) { /* Just deliver the packet by using queueing. This is called by the IAX thread with the iaxsl lock held. */ struct iax_frame *fr = data; fr->retrans = -1; if (iaxs[fr->callno] && !ast_test_flag(iaxs[fr->callno], IAX_ALREADYGONE)) iax2_queue_frame(fr->callno, &fr->af); /* Free our iax frame */ iax2_frame_free(fr); /* And don't run again */ return 0; } #ifndef NEWJB static int __real_do_deliver(void *data) { /* Locking version of __do_deliver */ struct iax_frame *fr = data; int callno = fr->callno; int res; ast_mutex_lock(&iaxsl[callno]); res = __do_deliver(data); ast_mutex_unlock(&iaxsl[callno]); return res; } static int do_deliver(void *data) { #ifdef SCHED_MULTITHREADED if (schedule_action(__do_deliver, data)) #endif __real_do_deliver(data); return 0; } #endif /* NEWJB */ static int handle_error(void) { /* XXX Ideally we should figure out why an error occured and then abort those rather than continuing to try. Unfortunately, the published interface does not seem to work XXX */ #if 0 struct sockaddr_in *sin; int res; struct msghdr m; struct sock_extended_err e; m.msg_name = NULL; m.msg_namelen = 0; m.msg_iov = NULL; m.msg_control = &e; m.msg_controllen = sizeof(e); m.msg_flags = 0; res = recvmsg(netsocket, &m, MSG_ERRQUEUE); if (res < 0) ast_log(LOG_WARNING, "Error detected, but unable to read error: %s\n", strerror(errno)); else { if (m.msg_controllen) { sin = (struct sockaddr_in *)SO_EE_OFFENDER(&e); if (sin) ast_log(LOG_WARNING, "Receive error from %s\n", ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr)); else ast_log(LOG_WARNING, "No address detected??\n"); } else { ast_log(LOG_WARNING, "Local error: %s\n", strerror(e.ee_errno)); } } #endif return 0; } static int transmit_trunk(struct iax_frame *f, struct sockaddr_in *sin, int sockfd) { int res; res = sendto(sockfd, f->data, f->datalen, 0,(struct sockaddr *)sin, sizeof(*sin)); if (res < 0) { if (option_debug) ast_log(LOG_DEBUG, "Received error: %s\n", strerror(errno)); handle_error(); } else res = 0; return res; } static int send_packet(struct iax_frame *f) { int res; char iabuf[INET_ADDRSTRLEN]; int callno = f->callno; /* Called with iaxsl held */ if (option_debug > 2 && iaxdebug) ast_log(LOG_DEBUG, "Sending %d on %d/%d to %s:%d\n", f->ts, callno, iaxs[callno]->peercallno, ast_inet_ntoa(iabuf, sizeof(iabuf), iaxs[callno]->addr.sin_addr), ntohs(iaxs[callno]->addr.sin_port)); /* Don't send if there was an error, but return error instead */ if (!callno) { ast_log(LOG_WARNING, "Call number = %d\n", callno); return -1; } if (!iaxs[callno]) return -1; if (iaxs[callno]->error) return -1; if (f->transfer) { if (iaxdebug) iax_showframe(f, NULL, 0, &iaxs[callno]->transfer, f->datalen - sizeof(struct ast_iax2_full_hdr)); res = sendto(iaxs[callno]->sockfd, f->data, f->datalen, 0,(struct sockaddr *)&iaxs[callno]->transfer, sizeof(iaxs[callno]->transfer)); } else { if (iaxdebug) iax_showframe(f, NULL, 0, &iaxs[callno]->addr, f->datalen - sizeof(struct ast_iax2_full_hdr)); res = sendto(iaxs[callno]->sockfd, f->data, f->datalen, 0,(struct sockaddr *)&iaxs[callno]->addr, sizeof(iaxs[callno]->addr)); } if (res < 0) { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Received error: %s\n", strerror(errno)); handle_error(); } else res = 0; return res; } static int iax2_predestroy(int callno) { struct ast_channel *c; struct chan_iax2_pvt *pvt; ast_mutex_lock(&iaxsl[callno]); pvt = iaxs[callno]; if (!pvt) { ast_mutex_unlock(&iaxsl[callno]); return -1; } if (!ast_test_flag(pvt, IAX_ALREADYGONE)) { /* No more pings or lagrq's */ if (pvt->pingid > -1) ast_sched_del(sched, pvt->pingid); if (pvt->lagid > -1) ast_sched_del(sched, pvt->lagid); if (pvt->autoid > -1) ast_sched_del(sched, pvt->autoid); if (pvt->authid > -1) ast_sched_del(sched, pvt->authid); if (pvt->initid > -1) ast_sched_del(sched, pvt->initid); #ifdef NEWJB if (pvt->jbid > -1) ast_sched_del(sched, pvt->jbid); pvt->jbid = -1; #endif pvt->pingid = -1; pvt->lagid = -1; pvt->autoid = -1; pvt->initid = -1; pvt->authid = -1; ast_set_flag(pvt, IAX_ALREADYGONE); } c = pvt->owner; if (c) { c->_softhangup |= AST_SOFTHANGUP_DEV; c->tech_pvt = NULL; ast_queue_hangup(c); pvt->owner = NULL; ast_mutex_lock(&usecnt_lock); usecnt--; if (usecnt < 0) ast_log(LOG_WARNING, "Usecnt < 0???\n"); ast_mutex_unlock(&usecnt_lock); } ast_mutex_unlock(&iaxsl[callno]); ast_update_use_count(); return 0; } static int iax2_predestroy_nolock(int callno) { int res; ast_mutex_unlock(&iaxsl[callno]); res = iax2_predestroy(callno); ast_mutex_lock(&iaxsl[callno]); return res; } static void iax2_destroy(int callno) { struct chan_iax2_pvt *pvt; struct iax_frame *cur; struct ast_channel *owner; retry: ast_mutex_lock(&iaxsl[callno]); pvt = iaxs[callno]; gettimeofday(&lastused[callno], NULL); if (pvt) owner = pvt->owner; else owner = NULL; if (owner) { if (ast_mutex_trylock(&owner->lock)) { ast_log(LOG_NOTICE, "Avoiding IAX destroy deadlock\n"); ast_mutex_unlock(&iaxsl[callno]); usleep(1); goto retry; } } if (!owner) iaxs[callno] = NULL; if (pvt) { if (!owner) pvt->owner = NULL; /* No more pings or lagrq's */ if (pvt->pingid > -1) ast_sched_del(sched, pvt->pingid); if (pvt->lagid > -1) ast_sched_del(sched, pvt->lagid); if (pvt->autoid > -1) ast_sched_del(sched, pvt->autoid); if (pvt->authid > -1) ast_sched_del(sched, pvt->authid); if (pvt->initid > -1) ast_sched_del(sched, pvt->initid); #ifdef NEWJB if (pvt->jbid > -1) ast_sched_del(sched, pvt->jbid); pvt->jbid = -1; #endif pvt->pingid = -1; pvt->lagid = -1; pvt->autoid = -1; pvt->authid = -1; pvt->initid = -1; if (pvt->bridgetrans) ast_translator_free_path(pvt->bridgetrans); pvt->bridgetrans = NULL; /* Already gone */ ast_set_flag(pvt, IAX_ALREADYGONE); if (owner) { /* If there's an owner, prod it to give up */ owner->_softhangup |= AST_SOFTHANGUP_DEV; ast_queue_hangup(owner); } for (cur = iaxq.head; cur ; cur = cur->next) { /* Cancel any pending transmissions */ if (cur->callno == pvt->callno) cur->retries = -1; } if (pvt->reg) { pvt->reg->callno = 0; } if (!owner) { if (pvt->vars) { ast_variables_destroy(pvt->vars); pvt->vars = NULL; } #ifdef NEWJB { jb_frame frame; while(jb_getall(pvt->jb,&frame) == JB_OK) iax2_frame_free(frame.data); jb_destroy(pvt->jb); } #endif free(pvt); } } if (owner) { ast_mutex_unlock(&owner->lock); } ast_mutex_unlock(&iaxsl[callno]); if (callno & 0x4000) update_max_trunk(); } static void iax2_destroy_nolock(int callno) { /* Actually it's easier to unlock, kill it, and relock */ ast_mutex_unlock(&iaxsl[callno]); iax2_destroy(callno); ast_mutex_lock(&iaxsl[callno]); } static int update_packet(struct iax_frame *f) { /* Called with iaxsl lock held, and iaxs[callno] non-NULL */ struct ast_iax2_full_hdr *fh = f->data; /* Mark this as a retransmission */ fh->dcallno = ntohs(IAX_FLAG_RETRANS | f->dcallno); /* Update iseqno */ f->iseqno = iaxs[f->callno]->iseqno; fh->iseqno = f->iseqno; return 0; } static int attempt_transmit(void *data); static void __attempt_transmit(void *data) { /* Attempt to transmit the frame to the remote peer... Called without iaxsl held. */ struct iax_frame *f = data; int freeme=0; int callno = f->callno; char iabuf[INET_ADDRSTRLEN]; /* Make sure this call is still active */ if (callno) ast_mutex_lock(&iaxsl[callno]); if ((f->callno) && iaxs[f->callno]) { if ((f->retries < 0) /* Already ACK'd */ || (f->retries >= max_retries) /* Too many attempts */) { /* Record an error if we've transmitted too many times */ if (f->retries >= max_retries) { if (f->transfer) { /* Transfer timeout */ send_command(iaxs[f->callno], AST_FRAME_IAX, IAX_COMMAND_TXREJ, 0, NULL, 0, -1); } else if (f->final) { if (f->final) iax2_destroy_nolock(f->callno); } else { if (iaxs[f->callno]->owner) ast_log(LOG_WARNING, "Max retries exceeded to host %s on %s (type = %d, subclass = %d, ts=%d, seqno=%d)\n", ast_inet_ntoa(iabuf, sizeof(iabuf), iaxs[f->callno]->addr.sin_addr),iaxs[f->callno]->owner->name , f->af.frametype, f->af.subclass, f->ts, f->oseqno); iaxs[f->callno]->error = ETIMEDOUT; if (iaxs[f->callno]->owner) { struct ast_frame fr = { 0, }; /* Hangup the fd */ fr.frametype = AST_FRAME_CONTROL; fr.subclass = AST_CONTROL_HANGUP; iax2_queue_frame(f->callno, &fr); /* Remember, owner could disappear */ if (iaxs[f->callno]->owner) iaxs[f->callno]->owner->hangupcause = AST_CAUSE_DESTINATION_OUT_OF_ORDER; } else { if (iaxs[f->callno]->reg) { memset(&iaxs[f->callno]->reg->us, 0, sizeof(iaxs[f->callno]->reg->us)); iaxs[f->callno]->reg->regstate = REG_STATE_TIMEOUT; iaxs[f->callno]->reg->refresh = IAX_DEFAULT_REG_EXPIRE; } iax2_destroy_nolock(f->callno); } } } freeme++; } else { /* Update it if it needs it */ update_packet(f); /* Attempt transmission */ send_packet(f); f->retries++; /* Try again later after 10 times as long */ f->retrytime *= 10; if (f->retrytime > MAX_RETRY_TIME) f->retrytime = MAX_RETRY_TIME; /* Transfer messages max out at one second */ if (f->transfer && (f->retrytime > 1000)) f->retrytime = 1000; f->retrans = ast_sched_add(sched, f->retrytime, attempt_transmit, f); } } else { /* Make sure it gets freed */ f->retries = -1; freeme++; } if (callno) ast_mutex_unlock(&iaxsl[callno]); /* Do not try again */ if (freeme) { /* Don't attempt delivery, just remove it from the queue */ ast_mutex_lock(&iaxq.lock); if (f->prev) f->prev->next = f->next; else iaxq.head = f->next; if (f->next) f->next->prev = f->prev; else iaxq.tail = f->prev; iaxq.count--; ast_mutex_unlock(&iaxq.lock); f->retrans = -1; /* Free the IAX frame */ iax2_frame_free(f); } } static int attempt_transmit(void *data) { #ifdef SCHED_MULTITHREADED if (schedule_action(__attempt_transmit, data)) #endif __attempt_transmit(data); return 0; } static int iax2_set_jitter(int fd, int argc, char *argv[]) { #ifdef NEWJB ast_cli(fd, "sorry, this command is deprecated\n"); return RESULT_SUCCESS; #else if ((argc != 4) && (argc != 5)) return RESULT_SHOWUSAGE; if (argc == 4) { max_jitter_buffer = atoi(argv[3]); if (max_jitter_buffer < 0) max_jitter_buffer = 0; } else { if (argc == 5) { if ((atoi(argv[3]) >= 0) && (atoi(argv[3]) < IAX_MAX_CALLS)) { if (iaxs[atoi(argv[3])]) { iaxs[atoi(argv[3])]->jitterbuffer = atoi(argv[4]); if (iaxs[atoi(argv[3])]->jitterbuffer < 0) iaxs[atoi(argv[3])]->jitterbuffer = 0; } else ast_cli(fd, "No such call '%d'\n", atoi(argv[3])); } else ast_cli(fd, "%d is not a valid call number\n", atoi(argv[3])); } } return RESULT_SUCCESS; #endif } static char jitter_usage[] = "Usage: iax set jitter [callid] \n" " If used with a callid, it sets the jitter buffer to the given static\n" "value (until its next calculation). If used without a callid, the value is used\n" "to establish the maximum excess jitter buffer that is permitted before the jitter\n" "buffer size is reduced."; static int iax2_prune_realtime(int fd, int argc, char *argv[]) { struct iax2_peer *peer; if (argc != 4) return RESULT_SHOWUSAGE; if (!strcmp(argv[3],"all")) { reload_config(); ast_cli(fd, "OK cache is flushed.\n"); } else if ((peer = find_peer(argv[3], 0))) { if(ast_test_flag(peer, IAX_RTCACHEFRIENDS)) { ast_set_flag(peer, IAX_RTAUTOCLEAR); expire_registry(peer); ast_cli(fd, "OK peer %s was removed from the cache.\n", argv[3]); } else { ast_cli(fd, "SORRY peer %s is not eligible for this operation.\n", argv[3]); } } else { ast_cli(fd, "SORRY peer %s was not found in the cache.\n", argv[3]); } return RESULT_SUCCESS; } static int iax2_test_losspct(int fd, int argc, char *argv[]) { if (argc != 4) return RESULT_SHOWUSAGE; test_losspct = atoi(argv[3]); return RESULT_SUCCESS; } #ifdef IAXTESTS static int iax2_test_late(int fd, int argc, char *argv[]) { if (argc != 4) return RESULT_SHOWUSAGE; test_late = atoi(argv[3]); return RESULT_SUCCESS; } static int iax2_test_resync(int fd, int argc, char *argv[]) { if (argc != 4) return RESULT_SHOWUSAGE; test_resync = atoi(argv[3]); return RESULT_SUCCESS; } static int iax2_test_jitter(int fd, int argc, char *argv[]) { if (argc < 4 || argc > 5) return RESULT_SHOWUSAGE; test_jit = atoi(argv[3]); if (argc == 5) test_jitpct = atoi(argv[4]); return RESULT_SUCCESS; } #endif /* IAXTESTS */ /*! \brief peer_status: Report Peer status in character string */ /* returns 1 if peer is online, -1 if unmonitored */ static int peer_status(struct iax2_peer *peer, char *status, int statuslen) { int res = 0; if (peer->maxms) { if (peer->lastms < 0) { ast_copy_string(status, "UNREACHABLE", statuslen); } else if (peer->lastms > peer->maxms) { snprintf(status, statuslen, "LAGGED (%d ms)", peer->lastms); res = 1; } else if (peer->lastms) { snprintf(status, statuslen, "OK (%d ms)", peer->lastms); res = 1; } else { ast_copy_string(status, "UNKNOWN", statuslen); } } else { ast_copy_string(status, "Unmonitored", statuslen); res = -1; } return res; } /*! \brief Show one peer in detail */ static int iax2_show_peer(int fd, int argc, char *argv[]) { char status[30]; char cbuf[256]; char iabuf[INET_ADDRSTRLEN]; struct iax2_peer *peer; char codec_buf[512]; int x = 0, codec = 0, load_realtime = 0; if (argc < 4) return RESULT_SHOWUSAGE; load_realtime = (argc == 5 && !strcmp(argv[4], "load")) ? 1 : 0; peer = find_peer(argv[3], load_realtime); if (peer) { ast_cli(fd,"\n\n"); ast_cli(fd, " * Name : %s\n", peer->name); ast_cli(fd, " Secret : %s\n", ast_strlen_zero(peer->secret)?"":""); ast_cli(fd, " Context : %s\n", peer->context); ast_cli(fd, " Mailbox : %s\n", peer->mailbox); ast_cli(fd, " Dynamic : %s\n", ast_test_flag(peer, IAX_DYNAMIC) ? "Yes":"No"); ast_cli(fd, " Callerid : %s\n", ast_callerid_merge(cbuf, sizeof(cbuf), peer->cid_name, peer->cid_num, "")); ast_cli(fd, " Expire : %d\n", peer->expire); ast_cli(fd, " ACL : %s\n", (peer->ha?"Yes":"No")); ast_cli(fd, " Addr->IP : %s Port %d\n", peer->addr.sin_addr.s_addr ? ast_inet_ntoa(iabuf, sizeof(iabuf), peer->addr.sin_addr) : "(Unspecified)", ntohs(peer->addr.sin_port)); ast_cli(fd, " Defaddr->IP : %s Port %d\n", ast_inet_ntoa(iabuf, sizeof(iabuf), peer->defaddr.sin_addr), ntohs(peer->defaddr.sin_port)); ast_cli(fd, " Username : %s\n", peer->username); ast_cli(fd, " Codecs : "); ast_getformatname_multiple(codec_buf, sizeof(codec_buf) -1, peer->capability); ast_cli(fd, "%s\n", codec_buf); ast_cli(fd, " Codec Order : ("); for(x = 0; x < 32 ; x++) { codec = ast_codec_pref_index(&peer->prefs,x); if(!codec) break; ast_cli(fd, "%s", ast_getformatname(codec)); if(x < 31 && ast_codec_pref_index(&peer->prefs,x+1)) ast_cli(fd, "|"); } if (!x) ast_cli(fd, "none"); ast_cli(fd, ")\n"); ast_cli(fd, " Status : "); peer_status(peer, status, sizeof(status)); ast_cli(fd, "%s\n",status); ast_cli(fd, " Qualify : every %dms when OK, every %dms when UNREACHABLE (sample smoothing %s)\n", peer->pokefreqok, peer->pokefreqnotok, peer->smoothing ? "On" : "Off"); ast_cli(fd,"\n"); if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); } else { ast_cli(fd,"Peer %s not found.\n", argv[3]); ast_cli(fd,"\n"); } return RESULT_SUCCESS; } static char *complete_iax2_show_peer(const char *line, const char *word, int pos, int state) { int which = 0; struct iax2_peer *p; char *res = NULL; int wordlen = strlen(word); /* 0 - iax2; 1 - show; 2 - peer; 3 - */ if (pos == 3) { ast_mutex_lock(&peerl.lock); for (p = peerl.peers ; p ; p = p->next) { if (!strncasecmp(p->name, word, wordlen) && ++which > state) { res = ast_strdup(p->name); break; } } ast_mutex_unlock(&peerl.lock); } return res; } static int iax2_show_stats(int fd, int argc, char *argv[]) { struct iax_frame *cur; int cnt = 0, dead=0, final=0; if (argc != 3) return RESULT_SHOWUSAGE; for (cur = iaxq.head; cur ; cur = cur->next) { if (cur->retries < 0) dead++; if (cur->final) final++; cnt++; } ast_cli(fd, " IAX Statistics\n"); ast_cli(fd, "---------------------\n"); ast_cli(fd, "Outstanding frames: %d (%d ingress, %d egress)\n", iax_get_frames(), iax_get_iframes(), iax_get_oframes()); ast_cli(fd, "Packets in transmit queue: %d dead, %d final, %d total\n", dead, final, cnt); return RESULT_SUCCESS; } static int iax2_show_cache(int fd, int argc, char *argv[]) { struct iax2_dpcache *dp; char tmp[1024], *pc; int s; int x,y; struct timeval tv; gettimeofday(&tv, NULL); ast_mutex_lock(&dpcache_lock); dp = dpcache; ast_cli(fd, "%-20.20s %-12.12s %-9.9s %-8.8s %s\n", "Peer/Context", "Exten", "Exp.", "Wait.", "Flags"); while(dp) { s = dp->expiry.tv_sec - tv.tv_sec; tmp[0] = '\0'; if (dp->flags & CACHE_FLAG_EXISTS) strncat(tmp, "EXISTS|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_NONEXISTENT) strncat(tmp, "NONEXISTENT|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_CANEXIST) strncat(tmp, "CANEXIST|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_PENDING) strncat(tmp, "PENDING|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_TIMEOUT) strncat(tmp, "TIMEOUT|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_TRANSMITTED) strncat(tmp, "TRANSMITTED|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_MATCHMORE) strncat(tmp, "MATCHMORE|", sizeof(tmp) - strlen(tmp) - 1); if (dp->flags & CACHE_FLAG_UNKNOWN) strncat(tmp, "UNKNOWN|", sizeof(tmp) - strlen(tmp) - 1); /* Trim trailing pipe */ if (!ast_strlen_zero(tmp)) tmp[strlen(tmp) - 1] = '\0'; else ast_copy_string(tmp, "(none)", sizeof(tmp)); y=0; pc = strchr(dp->peercontext, '@'); if (!pc) pc = dp->peercontext; else pc++; for (x=0;xwaiters) / sizeof(dp->waiters[0]); x++) if (dp->waiters[x] > -1) y++; if (s > 0) ast_cli(fd, "%-20.20s %-12.12s %-9d %-8d %s\n", pc, dp->exten, s, y, tmp); else ast_cli(fd, "%-20.20s %-12.12s %-9.9s %-8d %s\n", pc, dp->exten, "(expired)", y, tmp); dp = dp->next; } ast_mutex_unlock(&dpcache_lock); return RESULT_SUCCESS; } static unsigned int calc_rxstamp(struct chan_iax2_pvt *p, unsigned int offset); #ifdef BRIDGE_OPTIMIZATION static unsigned int calc_fakestamp(struct chan_iax2_pvt *from, struct chan_iax2_pvt *to, unsigned int ts); static int forward_delivery(struct iax_frame *fr) { struct chan_iax2_pvt *p1, *p2; char iabuf[INET_ADDRSTRLEN]; int res, orig_ts; p1 = iaxs[fr->callno]; p2 = iaxs[p1->bridgecallno]; if (!p1) return -1; if (!p2) return -1; if (option_debug) ast_log(LOG_DEBUG, "forward_delivery: Forwarding ts=%d on %d/%d to %d/%d on %s:%d\n", fr->ts, p1->callno, p1->peercallno, p2->callno, p2->peercallno, ast_inet_ntoa(iabuf, sizeof(iabuf), p2->addr.sin_addr), ntohs(p2->addr.sin_port)); /* Undo wraparound - which can happen when full VOICE frame wasn't sent by our peer. This is necessary for when our peer is chan_iax2.c v1.1nn or earlier which didn't send full frame on timestamp wrap when doing optimized bridging (actually current code STILL doesn't) */ if (fr->ts + 50000 <= p1->last) { fr->ts = ( (p1->last & 0xFFFF0000) + 0x10000) | (fr->ts & 0xFFFF); if (option_debug) ast_log(LOG_DEBUG, "forward_delivery: pushed forward timestamp to %u\n", fr->ts); } /* Send with timestamp adjusted to the origin of the outbound leg */ /* But don't destroy inbound timestamp still needed later to set "last" */ orig_ts = fr->ts; fr->ts = calc_fakestamp(p1, p2, fr->ts); res = iax2_send(p2, &fr->af, fr->ts, -1, 0, 0, 0); fr->ts = orig_ts; return res; } #endif static void unwrap_timestamp(struct iax_frame *fr) { int x; if ( (fr->ts & 0xFFFF0000) == (iaxs[fr->callno]->last & 0xFFFF0000) ) { x = fr->ts - iaxs[fr->callno]->last; if (x < -50000) { /* Sudden big jump backwards in timestamp: What likely happened here is that miniframe timestamp has circled but we haven't gotten the update from the main packet. We'll just pretend that we did, and update the timestamp appropriately. */ fr->ts = ( (iaxs[fr->callno]->last & 0xFFFF0000) + 0x10000) | (fr->ts & 0xFFFF); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: pushed forward timestamp\n"); } if (x > 50000) { /* Sudden apparent big jump forwards in timestamp: What's likely happened is this is an old miniframe belonging to the previous top-16-bit timestamp that has turned up out of order. Adjust the timestamp appropriately. */ fr->ts = ( (iaxs[fr->callno]->last & 0xFFFF0000) - 0x10000) | (fr->ts & 0xFFFF); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: pushed back timestamp\n"); } } } #ifdef NEWJB static int get_from_jb(void *p); static void update_jbsched(struct chan_iax2_pvt *pvt) { int when; when = ast_tvdiff_ms(ast_tvnow(), pvt->rxcore); /* fprintf(stderr, "now = %d, next=%d\n", when, jb_next(pvt->jb)); */ when = jb_next(pvt->jb) - when; /* fprintf(stderr, "when = %d\n", when); */ if(pvt->jbid > -1) ast_sched_del(sched, pvt->jbid); if(when <= 0) { /* XXX should really just empty until when > 0.. */ when = 1; } pvt->jbid = ast_sched_add(sched, when, get_from_jb, (void *)pvt); /* Signal scheduler thread */ signal_condition(&sched_lock, &sched_cond); } static void __get_from_jb(void *p) { /* make sure pvt is valid! */ struct chan_iax2_pvt *pvt = p; struct iax_frame *fr; jb_frame frame; int ret; long now; long next; struct timeval tv; ast_mutex_lock(&iaxsl[pvt->callno]); /* fprintf(stderr, "get_from_jb called\n"); */ pvt->jbid = -1; gettimeofday(&tv,NULL); /* round up a millisecond since ast_sched_runq does; */ /* prevents us from spinning while waiting for our now */ /* to catch up with runq's now */ tv.tv_usec += 1000; now = ast_tvdiff_ms(tv, pvt->rxcore); if(now >= (next = jb_next(pvt->jb))) { ret = jb_get(pvt->jb,&frame,now,ast_codec_interp_len(pvt->voiceformat)); switch(ret) { case JB_OK: /*if(frame.type == JB_TYPE_VOICE && next + 20 != jb_next(pvt->jb)) fprintf(stderr, "NEXT %ld is not %ld+20!\n", jb_next(pvt->jb), next); */ fr = frame.data; __do_deliver(fr); break; case JB_INTERP: { struct ast_frame af; /*if(next + 20 != jb_next(pvt->jb)) fprintf(stderr, "NEXT %ld is not %ld+20!\n", jb_next(pvt->jb), next); */ /* create an interpolation frame */ /*fprintf(stderr, "Making Interpolation frame\n"); */ af.frametype = AST_FRAME_VOICE; af.subclass = pvt->voiceformat; af.datalen = 0; af.samples = frame.ms * 8; af.mallocd = 0; af.src = "IAX2 JB interpolation"; af.data = NULL; af.delivery = ast_tvadd(pvt->rxcore, ast_samp2tv(next, 1000)); af.offset=AST_FRIENDLY_OFFSET; /* queue the frame: For consistency, we would call __do_deliver here, but __do_deliver wants an iax_frame, * which we'd need to malloc, and then it would free it. That seems like a drag */ if (iaxs[pvt->callno] && !ast_test_flag(iaxs[pvt->callno], IAX_ALREADYGONE)) iax2_queue_frame(pvt->callno, &af); } break; case JB_DROP: /*if(next != jb_next(pvt->jb)) fprintf(stderr, "NEXT %ld is not next %ld!\n", jb_next(pvt->jb), next); */ iax2_frame_free(frame.data); break; case JB_NOFRAME: case JB_EMPTY: /* do nothing */ break; default: /* shouldn't happen */ break; } } update_jbsched(pvt); ast_mutex_unlock(&iaxsl[pvt->callno]); } static int get_from_jb(void *data) { #ifdef SCHED_MULTITHREADED if (schedule_action(__get_from_jb, data)) #endif __get_from_jb(data); return 0; } #endif /* while we transition from the old JB to the new one, we can either make two schedule_delivery functions, or * make preprocessor swiss-cheese out of this one. I'm not sure which is less revolting.. */ static int schedule_delivery(struct iax_frame *fr, int updatehistory, int fromtrunk, unsigned int *tsout) { #ifdef NEWJB int type, len; int ret; int needfree = 0; #else int x; int ms; int delay; unsigned int orig_ts; int drops[MEMORY_SIZE]; int min, max=0, prevjitterbuffer, maxone=0,y,z, match; /* Remember current jitterbuffer so we can log any change */ prevjitterbuffer = iaxs[fr->callno]->jitterbuffer; /* Similarly for the frame timestamp */ orig_ts = fr->ts; #endif #if 0 if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: ts=%d, last=%d, update=%d\n", fr->ts, iaxs[fr->callno]->last, updatehistory); #endif /* Attempt to recover wrapped timestamps */ unwrap_timestamp(fr); if (updatehistory) { #ifndef NEWJB /* Attempt to spot a change of timebase on timestamps coming from the other side We detect by noticing a jump in consecutive timestamps that can't reasonably be explained by network jitter or reordering. Sometimes, also, the peer stops sending us frames for a while - in this case this code might also resync us. But that's not a bad thing. Be careful of non-voice frames which are timestamped differently (especially ACKS!) [that's why we only do this when updatehistory is true] */ x = fr->ts - iaxs[fr->callno]->last; if (x > TS_GAP_FOR_JB_RESYNC || x < -TS_GAP_FOR_JB_RESYNC) { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: call=%d: TS jumped. resyncing rxcore (ts=%d, last=%d)\n", fr->callno, fr->ts, iaxs[fr->callno]->last); /* zap rxcore - calc_rxstamp will make a new one based on this frame */ iaxs[fr->callno]->rxcore = ast_tv(0, 0); /* wipe "last" if stamps have jumped backwards */ if (x<0) iaxs[fr->callno]->last = 0; /* should we also empty history? */ } /* ms is a measure of the "lateness" of the frame relative to the "reference" frame we received. (initially the very first, but also see code just above here). Understand that "ms" can easily be -ve if lag improves since the reference frame. Called by IAX thread, with iaxsl lock held. */ ms = calc_rxstamp(iaxs[fr->callno], fr->ts) - fr->ts; /* Rotate our history queue of "lateness". Don't worry about those initial zeros because the first entry will always be zero */ for (x=0;xcallno]->history[x] = iaxs[fr->callno]->history[x+1]; /* Add a history entry for this one */ iaxs[fr->callno]->history[x] = ms; #endif } #ifndef NEWJB else ms = 0; #endif /* delivery time is sender's sent timestamp converted back into absolute time according to our clock */ if ( !fromtrunk && !ast_tvzero(iaxs[fr->callno]->rxcore)) fr->af.delivery = ast_tvadd(iaxs[fr->callno]->rxcore, ast_samp2tv(fr->ts, 1000)); else { #if 0 ast_log(LOG_DEBUG, "schedule_delivery: set delivery to 0 as we don't have an rxcore yet, or frame is from trunk.\n"); #endif fr->af.delivery = ast_tv(0,0); } #ifndef NEWJB /* Initialize the minimum to reasonable values. It's too much work to do the same for the maximum, repeatedly */ min=iaxs[fr->callno]->history[0]; for (z=0;z < iax2_dropcount + 1;z++) { /* Start very optimistic ;-) */ max=-999999999; for (x=0;xcallno]->history[x]) { /* We have a candidate new maximum value. Make sure it's not in our drop list */ match = 0; for (y=0;!match && (ycallno]->history[x]; maxone = x; } } if (!z) { /* On our first pass, find the minimum too */ if (min > iaxs[fr->callno]->history[x]) min = iaxs[fr->callno]->history[x]; } } #if 1 drops[z] = maxone; #endif } #endif #ifdef NEWJB type = JB_TYPE_CONTROL; len = 0; if(fr->af.frametype == AST_FRAME_VOICE) { type = JB_TYPE_VOICE; len = ast_codec_get_samples(&fr->af) / 8; } else if(fr->af.frametype == AST_FRAME_CNG) { type = JB_TYPE_SILENCE; } if ( (!ast_test_flag(iaxs[fr->callno], IAX_USEJITTERBUF)) ) { if (tsout) *tsout = fr->ts; __do_deliver(fr); return -1; } /* if the user hasn't requested we force the use of the jitterbuffer, and we're bridged to * a channel that can accept jitter, then flush and suspend the jb, and send this frame straight through */ if( (!ast_test_flag(iaxs[fr->callno], IAX_FORCEJITTERBUF)) && iaxs[fr->callno]->owner && ast_bridged_channel(iaxs[fr->callno]->owner) && (ast_bridged_channel(iaxs[fr->callno]->owner)->tech->properties & AST_CHAN_TP_WANTSJITTER)) { jb_frame frame; /* deliver any frames in the jb */ while(jb_getall(iaxs[fr->callno]->jb,&frame) == JB_OK) __do_deliver(frame.data); jb_reset(iaxs[fr->callno]->jb); if (iaxs[fr->callno]->jbid > -1) ast_sched_del(sched, iaxs[fr->callno]->jbid); iaxs[fr->callno]->jbid = -1; /* deliver this frame now */ if (tsout) *tsout = fr->ts; __do_deliver(fr); return -1; } /* insert into jitterbuffer */ /* TODO: Perhaps we could act immediately if it's not droppable and late */ ret = jb_put(iaxs[fr->callno]->jb, fr, type, len, fr->ts, calc_rxstamp(iaxs[fr->callno],fr->ts)); if (ret == JB_DROP) { needfree++; } else if (ret == JB_SCHED) { update_jbsched(iaxs[fr->callno]); } #else /* Just for reference, keep the "jitter" value, the difference between the earliest and the latest. */ if (max >= min) iaxs[fr->callno]->jitter = max - min; /* IIR filter for keeping track of historic jitter, but always increase historic jitter immediately for increase */ if (iaxs[fr->callno]->jitter > iaxs[fr->callno]->historicjitter ) iaxs[fr->callno]->historicjitter = iaxs[fr->callno]->jitter; else iaxs[fr->callno]->historicjitter = GAMMA * (double)iaxs[fr->callno]->jitter + (1-GAMMA) * iaxs[fr->callno]->historicjitter; /* If our jitter buffer is too big (by a significant margin), then we slowly shrink it to avoid letting the change be perceived */ if (max < iaxs[fr->callno]->jitterbuffer - max_jitter_buffer) iaxs[fr->callno]->jitterbuffer -= jittershrinkrate; /* If our jitter buffer headroom is too small (by a significant margin), then we slowly enlarge it */ /* min_jitter_buffer should be SMALLER than max_jitter_buffer - leaving a "no mans land" in between - otherwise the jitterbuffer size will hunt up and down causing unnecessary disruption. Set maxexcessbuffer to say 150msec, minexcessbuffer to say 50 */ if (max > iaxs[fr->callno]->jitterbuffer - min_jitter_buffer) iaxs[fr->callno]->jitterbuffer += jittershrinkrate; /* If our jitter buffer is smaller than our maximum delay, grow the jitter buffer immediately to accomodate it (and a little more). */ if (max > iaxs[fr->callno]->jitterbuffer) iaxs[fr->callno]->jitterbuffer = max /* + ((float)iaxs[fr->callno]->jitter) * 0.1 */; /* update "min", just for RRs and stats */ iaxs[fr->callno]->min = min; /* Subtract the lateness from our jitter buffer to know how long to wait before sending our packet. */ delay = iaxs[fr->callno]->jitterbuffer - ms; /* Whatever happens, no frame waits longer than maxjitterbuffer */ if (delay > maxjitterbuffer) delay = maxjitterbuffer; /* If jitter buffer is disabled then just pretend the frame is "right on time" */ /* If frame came from trunk, also don't do any delay */ if ( (!ast_test_flag(iaxs[fr->callno], IAX_USEJITTERBUF)) || fromtrunk ) delay = 0; if (option_debug && iaxdebug) { /* Log jitter stats for possible offline analysis */ ast_log(LOG_DEBUG, "Jitter: call=%d ts=%d orig=%d last=%d %s: min=%d max=%d jb=%d %+d lateness=%d jbdelay=%d jitter=%d historic=%d\n", fr->callno, fr->ts, orig_ts, iaxs[fr->callno]->last, (fr->af.frametype == AST_FRAME_VOICE) ? "VOICE" : "CONTROL", min, max, iaxs[fr->callno]->jitterbuffer, iaxs[fr->callno]->jitterbuffer - prevjitterbuffer, ms, delay, iaxs[fr->callno]->jitter, iaxs[fr->callno]->historicjitter); } if (delay < 1) { /* Don't deliver it more than 4 ms late */ if ((delay > -4) || (fr->af.frametype != AST_FRAME_VOICE)) { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: Delivering immediately (Calculated delay is %d)\n", delay); if (tsout) *tsout = fr->ts; __do_deliver(fr); return -1; } else { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: Dropping voice packet since %dms delay is too old\n", delay); iaxs[fr->callno]->frames_dropped++; needfree++; } } else { if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "schedule_delivery: Scheduling delivery in %d ms\n", delay); fr->retrans = ast_sched_add(sched, delay, do_deliver, fr); signal_condition(&sched_lock, &sched_cond); } #endif if (tsout) *tsout = fr->ts; if (needfree) { /* Free our iax frame */ iax2_frame_free(fr); return -1; } return 0; } static int iax2_transmit(struct iax_frame *fr) { /* Lock the queue and place this packet at the end */ fr->next = NULL; fr->prev = NULL; /* By setting this to 0, the network thread will send it for us, and queue retransmission if necessary */ fr->sentyet = 0; ast_mutex_lock(&iaxq.lock); if (!iaxq.head) { /* Empty queue */ iaxq.head = fr; iaxq.tail = fr; } else { /* Double link */ iaxq.tail->next = fr; fr->prev = iaxq.tail; iaxq.tail = fr; } iaxq.count++; ast_mutex_unlock(&iaxq.lock); /* Wake up the network and scheduler thread */ pthread_kill(netthreadid, SIGURG); signal_condition(&sched_lock, &sched_cond); return 0; } static int iax2_digit(struct ast_channel *c, char digit) { return send_command_locked(PTR_TO_CALLNO(c->tech_pvt), AST_FRAME_DTMF, digit, 0, NULL, 0, -1); } static int iax2_sendtext(struct ast_channel *c, const char *text) { return send_command_locked(PTR_TO_CALLNO(c->tech_pvt), AST_FRAME_TEXT, 0, 0, (unsigned char *)text, strlen(text) + 1, -1); } static int iax2_sendimage(struct ast_channel *c, struct ast_frame *img) { return send_command_locked(PTR_TO_CALLNO(c->tech_pvt), AST_FRAME_IMAGE, img->subclass, 0, img->data, img->datalen, -1); } static int iax2_sendhtml(struct ast_channel *c, int subclass, const char *data, int datalen) { return send_command_locked(PTR_TO_CALLNO(c->tech_pvt), AST_FRAME_HTML, subclass, 0, (unsigned char *)data, datalen, -1); } static int iax2_fixup(struct ast_channel *oldchannel, struct ast_channel *newchan) { unsigned short callno = PTR_TO_CALLNO(newchan->tech_pvt); ast_mutex_lock(&iaxsl[callno]); if (iaxs[callno]) iaxs[callno]->owner = newchan; else ast_log(LOG_WARNING, "Uh, this isn't a good sign...\n"); ast_mutex_unlock(&iaxsl[callno]); return 0; } static struct iax2_peer *build_peer(const char *name, struct ast_variable *v, int temponly); static struct iax2_user *build_user(const char *name, struct ast_variable *v, int temponly); static void destroy_user(struct iax2_user *user); static int expire_registry(void *data); static struct iax2_peer *realtime_peer(const char *peername, struct sockaddr_in *sin) { struct ast_variable *var; struct ast_variable *tmp; struct iax2_peer *peer=NULL; time_t regseconds = 0, nowtime; int dynamic=0; if (peername) var = ast_load_realtime("iaxpeers", "name", peername, NULL); else { char iabuf[INET_ADDRSTRLEN]; char porta[25]; ast_inet_ntoa(iabuf, sizeof(iabuf), sin->sin_addr); sprintf(porta, "%d", ntohs(sin->sin_port)); var = ast_load_realtime("iaxpeers", "ipaddr", iabuf, "port", porta, NULL); if (var) { /* We'll need the peer name in order to build the structure! */ tmp = var; while(tmp) { if (!strcasecmp(tmp->name, "name")) peername = tmp->value; tmp = tmp->next; } } } if (!var) return NULL; peer = build_peer(peername, var, ast_test_flag((&globalflags), IAX_RTCACHEFRIENDS) ? 0 : 1); if (!peer) return NULL; tmp = var; while(tmp) { /* Make sure it's not a user only... */ if (!strcasecmp(tmp->name, "type")) { if (strcasecmp(tmp->value, "friend") && strcasecmp(tmp->value, "peer")) { /* Whoops, we weren't supposed to exist! */ destroy_peer(peer); peer = NULL; break; } } else if (!strcasecmp(tmp->name, "regseconds")) { ast_get_time_t(tmp->value, ®seconds, 0, NULL); } else if (!strcasecmp(tmp->name, "ipaddr")) { inet_aton(tmp->value, &(peer->addr.sin_addr)); } else if (!strcasecmp(tmp->name, "port")) { peer->addr.sin_port = htons(atoi(tmp->value)); } else if (!strcasecmp(tmp->name, "host")) { if (!strcasecmp(tmp->value, "dynamic")) dynamic = 1; } tmp = tmp->next; } if (!peer) return NULL; ast_variables_destroy(var); if (ast_test_flag((&globalflags), IAX_RTCACHEFRIENDS)) { ast_copy_flags(peer, &globalflags, IAX_RTAUTOCLEAR|IAX_RTCACHEFRIENDS); if (ast_test_flag(peer, IAX_RTAUTOCLEAR)) { if (peer->expire > -1) ast_sched_del(sched, peer->expire); peer->expire = ast_sched_add(sched, (global_rtautoclear) * 1000, expire_registry, peer); } ast_mutex_lock(&peerl.lock); peer->next = peerl.peers; peerl.peers = peer; ast_mutex_unlock(&peerl.lock); if (ast_test_flag(peer, IAX_DYNAMIC)) reg_source_db(peer); } else { ast_set_flag(peer, IAX_TEMPONLY); } if (!ast_test_flag(&globalflags, IAX_RTIGNOREREGEXPIRE) && dynamic) { time(&nowtime); if ((nowtime - regseconds) > IAX_DEFAULT_REG_EXPIRE) { memset(&peer->addr, 0, sizeof(peer->addr)); if (option_debug) ast_log(LOG_DEBUG, "realtime_peer: Bah, '%s' is expired (%d/%d/%d)!\n", peername, (int)(nowtime - regseconds), (int)regseconds, (int)nowtime); } else { if (option_debug) ast_log(LOG_DEBUG, "realtime_peer: Registration for '%s' still active (%d/%d/%d)!\n", peername, (int)(nowtime - regseconds), (int)regseconds, (int)nowtime); } } return peer; } static struct iax2_user *realtime_user(const char *username) { struct ast_variable *var; struct ast_variable *tmp; struct iax2_user *user=NULL; var = ast_load_realtime("iaxusers", "name", username, NULL); if (!var) return NULL; tmp = var; while(tmp) { /* Make sure it's not a peer only... */ if (!strcasecmp(tmp->name, "type")) { if (strcasecmp(tmp->value, "friend") && strcasecmp(tmp->value, "user")) { return NULL; } } tmp = tmp->next; } user = build_user(username, var, !ast_test_flag((&globalflags), IAX_RTCACHEFRIENDS)); if (!user) return NULL; ast_variables_destroy(var); if (ast_test_flag((&globalflags), IAX_RTCACHEFRIENDS)) { ast_set_flag(user, IAX_RTCACHEFRIENDS); ast_mutex_lock(&userl.lock); user->next = userl.users; userl.users = user; ast_mutex_unlock(&userl.lock); } else { ast_set_flag(user, IAX_TEMPONLY); } return user; } static void realtime_update_peer(const char *peername, struct sockaddr_in *sin) { char port[10]; char ipaddr[20]; char regseconds[20]; time_t nowtime; time(&nowtime); snprintf(regseconds, sizeof(regseconds), "%d", (int)nowtime); ast_inet_ntoa(ipaddr, sizeof(ipaddr), sin->sin_addr); snprintf(port, sizeof(port), "%d", ntohs(sin->sin_port)); ast_update_realtime("iaxpeers", "name", peername, "ipaddr", ipaddr, "port", port, "regseconds", regseconds, NULL); } struct create_addr_info { int capability; unsigned int flags; int maxtime; int encmethods; int found; int sockfd; char username[80]; char secret[80]; char outkey[80]; char timezone[80]; char prefs[32]; char context[AST_MAX_CONTEXT]; char peercontext[AST_MAX_CONTEXT]; }; static int create_addr(const char *peername, struct sockaddr_in *sin, struct create_addr_info *cai) { struct ast_hostent ahp; struct hostent *hp; struct iax2_peer *peer; ast_clear_flag(cai, IAX_SENDANI | IAX_TRUNK); cai->sockfd = defaultsockfd; cai->maxtime = 0; sin->sin_family = AF_INET; if (!(peer = find_peer(peername, 1))) { cai->found = 0; hp = ast_gethostbyname(peername, &ahp); if (hp) { memcpy(&sin->sin_addr, hp->h_addr, sizeof(sin->sin_addr)); sin->sin_port = htons(IAX_DEFAULT_PORTNO); /* use global iax prefs for unknown peer/user */ ast_codec_pref_convert(&prefs, cai->prefs, sizeof(cai->prefs), 1); return 0; } else { ast_log(LOG_WARNING, "No such host: %s\n", peername); return -1; } } cai->found = 1; /* if the peer has no address (current or default), return failure */ if (!(peer->addr.sin_addr.s_addr || peer->defaddr.sin_addr.s_addr)) { if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); return -1; } /* if the peer is being monitored and is currently unreachable, return failure */ if (peer->maxms && ((peer->lastms > peer->maxms) || (peer->lastms < 0))) { if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); return -1; } ast_copy_flags(cai, peer, IAX_SENDANI | IAX_TRUNK | IAX_NOTRANSFER | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF); cai->maxtime = peer->maxms; cai->capability = peer->capability; cai->encmethods = peer->encmethods; cai->sockfd = peer->sockfd; ast_codec_pref_convert(&peer->prefs, cai->prefs, sizeof(cai->prefs), 1); ast_copy_string(cai->context, peer->context, sizeof(cai->context)); ast_copy_string(cai->peercontext, peer->peercontext, sizeof(cai->peercontext)); ast_copy_string(cai->username, peer->username, sizeof(cai->username)); ast_copy_string(cai->timezone, peer->zonetag, sizeof(cai->timezone)); ast_copy_string(cai->outkey, peer->outkey, sizeof(cai->outkey)); if (ast_strlen_zero(peer->dbsecret)) { ast_copy_string(cai->secret, peer->secret, sizeof(cai->secret)); } else { char *family; char *key = NULL; family = ast_strdupa(peer->dbsecret); if (family) { key = strchr(family, '/'); if (key) *key++ = '\0'; } if (!family || !key || ast_db_get(family, key, cai->secret, sizeof(cai->secret))) { ast_log(LOG_WARNING, "Unable to retrieve database password for family/key '%s'!\n", peer->dbsecret); if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); return -1; } } if (peer->addr.sin_addr.s_addr) { sin->sin_addr = peer->addr.sin_addr; sin->sin_port = peer->addr.sin_port; } else { sin->sin_addr = peer->defaddr.sin_addr; sin->sin_port = peer->defaddr.sin_port; } if (ast_test_flag(peer, IAX_TEMPONLY)) destroy_peer(peer); return 0; } static void __auto_congest(void *nothing) { int callno = PTR_TO_CALLNO(nothing); struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_CONGESTION }; ast_mutex_lock(&iaxsl[callno]); if (iaxs[callno]) { iaxs[callno]->initid = -1; iax2_queue_frame(callno, &f); ast_log(LOG_NOTICE, "Auto-congesting call due to slow response\n"); } ast_mutex_unlock(&iaxsl[callno]); } static int auto_congest(void *data) { #ifdef SCHED_MULTITHREADED if (schedule_action(__auto_congest, data)) #endif __auto_congest(data); return 0; } static unsigned int iax2_datetime(char *tz) { time_t t; struct tm tm; unsigned int tmp; time(&t); localtime_r(&t, &tm); if (!ast_strlen_zero(tz)) ast_localtime(&t, &tm, tz); tmp = (tm.tm_sec >> 1) & 0x1f; /* 5 bits of seconds */ tmp |= (tm.tm_min & 0x3f) << 5; /* 6 bits of minutes */ tmp |= (tm.tm_hour & 0x1f) << 11; /* 5 bits of hours */ tmp |= (tm.tm_mday & 0x1f) << 16; /* 5 bits of day of month */ tmp |= ((tm.tm_mon + 1) & 0xf) << 21; /* 4 bits of month */ tmp |= ((tm.tm_year - 100) & 0x7f) << 25; /* 7 bits of year */ return tmp; } struct parsed_dial_string { char *username; char *password; char *key; char *peer; char *port; char *exten; char *context; char *options; }; /*! * \brief Parses an IAX dial string into its component parts. * \param data the string to be parsed * \param pds pointer to a \c struct \c parsed_dial_string to be filled in * \return nothing * * This function parses the string and fills the structure * with pointers to its component parts. The input string * will be modified. * * \note This function supports both plaintext passwords and RSA * key names; if the password string is formatted as '[keyname]', * then the keyname will be placed into the key field, and the * password field will be set to NULL. * * \note The dial string format is: * [username[:password]@]peer[:port][/exten[@@context]][/options] */ static void parse_dial_string(char *data, struct parsed_dial_string *pds) { if (ast_strlen_zero(data)) return; pds->peer = strsep(&data, "/"); pds->exten = strsep(&data, "/"); pds->options = data; if (pds->exten) { data = pds->exten; pds->exten = strsep(&data, "@"); pds->context = data; } if (strchr(pds->peer, '@')) { data = pds->peer; pds->username = strsep(&data, "@"); pds->peer = data; } if (pds->username) { data = pds->username; pds->username = strsep(&data, ":"); pds->password = data; } data = pds->peer; pds->peer = strsep(&data, ":"); pds->port = data; /* check for a key name wrapped in [] in the secret position, if found, move it to the key field instead */ if (pds->password && (pds->password[0] == '[')) { pds->key = ast_strip_quoted(pds->password, "[", "]"); pds->password = NULL; } } static int iax2_call(struct ast_channel *c, char *dest, int timeout) { struct sockaddr_in sin; char *l=NULL, *n=NULL, *tmpstr; struct iax_ie_data ied; char *defaultrdest = "s"; unsigned short callno = PTR_TO_CALLNO(c->tech_pvt); struct parsed_dial_string pds; struct create_addr_info cai; if ((c->_state != AST_STATE_DOWN) && (c->_state != AST_STATE_RESERVED)) { ast_log(LOG_WARNING, "Channel is already in use (%s)?\n", c->name); return -1; } memset(&cai, 0, sizeof(cai)); cai.encmethods = iax2_encryption; memset(&pds, 0, sizeof(pds)); tmpstr = ast_strdupa(dest); parse_dial_string(tmpstr, &pds); if (!pds.exten) pds.exten = defaultrdest; if (create_addr(pds.peer, &sin, &cai)) { ast_log(LOG_WARNING, "No address associated with '%s'\n", pds.peer); return -1; } if (!pds.username && !ast_strlen_zero(cai.username)) pds.username = cai.username; if (!pds.password && !ast_strlen_zero(cai.secret)) pds.password = cai.secret; if (!pds.key && !ast_strlen_zero(cai.outkey)) pds.key = cai.outkey; if (!pds.context && !ast_strlen_zero(cai.peercontext)) pds.context = cai.peercontext; /* Keep track of the context for outgoing calls too */ ast_copy_string(c->context, cai.context, sizeof(c->context)); if (pds.port) sin.sin_port = htons(atoi(pds.port)); l = c->cid.cid_num; n = c->cid.cid_name; /* Now build request */ memset(&ied, 0, sizeof(ied)); /* On new call, first IE MUST be IAX version of caller */ iax_ie_append_short(&ied, IAX_IE_VERSION, IAX_PROTO_VERSION); iax_ie_append_str(&ied, IAX_IE_CALLED_NUMBER, pds.exten); if (pds.options && strchr(pds.options, 'a')) { /* Request auto answer */ iax_ie_append(&ied, IAX_IE_AUTOANSWER); } iax_ie_append_str(&ied, IAX_IE_CODEC_PREFS, cai.prefs); if (l) { iax_ie_append_str(&ied, IAX_IE_CALLING_NUMBER, l); iax_ie_append_byte(&ied, IAX_IE_CALLINGPRES, c->cid.cid_pres); } else { if (n) iax_ie_append_byte(&ied, IAX_IE_CALLINGPRES, c->cid.cid_pres); else iax_ie_append_byte(&ied, IAX_IE_CALLINGPRES, AST_PRES_NUMBER_NOT_AVAILABLE); } iax_ie_append_byte(&ied, IAX_IE_CALLINGTON, c->cid.cid_ton); iax_ie_append_short(&ied, IAX_IE_CALLINGTNS, c->cid.cid_tns); if (n) iax_ie_append_str(&ied, IAX_IE_CALLING_NAME, n); if (ast_test_flag(iaxs[callno], IAX_SENDANI) && c->cid.cid_ani) iax_ie_append_str(&ied, IAX_IE_CALLING_ANI, c->cid.cid_ani); if (!ast_strlen_zero(c->language)) iax_ie_append_str(&ied, IAX_IE_LANGUAGE, c->language); if (!ast_strlen_zero(c->cid.cid_dnid)) iax_ie_append_str(&ied, IAX_IE_DNID, c->cid.cid_dnid); if (!ast_strlen_zero(c->cid.cid_rdnis)) iax_ie_append_str(&ied, IAX_IE_RDNIS, c->cid.cid_rdnis); if (pds.context) iax_ie_append_str(&ied, IAX_IE_CALLED_CONTEXT, pds.context); if (pds.username) iax_ie_append_str(&ied, IAX_IE_USERNAME, pds.username); if (cai.encmethods) iax_ie_append_short(&ied, IAX_IE_ENCRYPTION, cai.encmethods); ast_mutex_lock(&iaxsl[callno]); if (!ast_strlen_zero(c->context)) ast_copy_string(iaxs[callno]->context, c->context, sizeof(iaxs[callno]->context)); if (pds.username) ast_copy_string(iaxs[callno]->username, pds.username, sizeof(iaxs[callno]->username)); iaxs[callno]->encmethods = cai.encmethods; if (pds.key) ast_copy_string(iaxs[callno]->outkey, pds.key, sizeof(iaxs[callno]->outkey)); if (pds.password) ast_copy_string(iaxs[callno]->secret, pds.password, sizeof(iaxs[callno]->secret)); iax_ie_append_int(&ied, IAX_IE_FORMAT, c->nativeformats); iax_ie_append_int(&ied, IAX_IE_CAPABILITY, iaxs[callno]->capability); iax_ie_append_short(&ied, IAX_IE_ADSICPE, c->adsicpe); iax_ie_append_int(&ied, IAX_IE_DATETIME, iax2_datetime(cai.timezone)); if (iaxs[callno]->maxtime) { /* Initialize pingtime and auto-congest time */ iaxs[callno]->pingtime = iaxs[callno]->maxtime / 2; iaxs[callno]->initid = ast_sched_add(sched, iaxs[callno]->maxtime * 2, auto_congest, CALLNO_TO_PTR(callno)); } else if (autokill) { iaxs[callno]->pingtime = autokill / 2; iaxs[callno]->initid = ast_sched_add(sched, autokill * 2, auto_congest, CALLNO_TO_PTR(callno)); } /* Transmit the string in a "NEW" request */ send_command(iaxs[callno], AST_FRAME_IAX, IAX_COMMAND_NEW, 0, ied.buf, ied.pos, -1); ast_mutex_unlock(&iaxsl[callno]); ast_setstate(c, AST_STATE_RINGING); return 0; } static int iax2_hangup(struct ast_channel *c) { unsigned short callno = PTR_TO_CALLNO(c->tech_pvt); int alreadygone; struct iax_ie_data ied; memset(&ied, 0, sizeof(ied)); ast_mutex_lock(&iaxsl[callno]); if (callno && iaxs[callno]) { ast_log(LOG_DEBUG, "We're hanging up %s now...\n", c->name); alreadygone = ast_test_flag(iaxs[callno], IAX_ALREADYGONE); /* Send the hangup unless we have had a transmission error or are already gone */ iax_ie_append_byte(&ied, IAX_IE_CAUSECODE, (unsigned char)c->hangupcause); if (!iaxs[callno]->error && !alreadygone) send_command_final(iaxs[callno], AST_FRAME_IAX, IAX_COMMAND_HANGUP, 0, ied.buf, ied.pos, -1); /* Explicitly predestroy it */ iax2_predestroy_nolock(callno); /* If we were already gone to begin with, destroy us now */ if (alreadygone) { ast_log(LOG_DEBUG, "Really destroying %s now...\n", c->name); iax2_destroy_nolock(callno); } } ast_mutex_unlock(&iaxsl[callno]); if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Hungup '%s'\n", c->name); return 0; } static int iax2_setoption(struct ast_channel *c, int option, void *data, int datalen) { struct ast_option_header *h; int res; switch (option) { case AST_OPTION_TXGAIN: case AST_OPTION_RXGAIN: /* these two cannot be sent, because they require a result */ errno = ENOSYS; return -1; default: if (!(h = ast_malloc(datalen + sizeof(*h)))) return -1; h->flag = AST_OPTION_FLAG_REQUEST; h->option = htons(option); memcpy(h->data, data, datalen); res = send_command_locked(PTR_TO_CALLNO(c->tech_pvt), AST_FRAME_CONTROL, AST_CONTROL_OPTION, 0, (unsigned char *) h, datalen + sizeof(*h), -1); free(h); return res; } } static struct ast_frame *iax2_read(struct ast_channel *c) { ast_log(LOG_NOTICE, "I should never be called!\n"); return &ast_null_frame; } static int iax2_start_transfer(unsigned short callno0, unsigned short callno1) { int res; struct iax_ie_data ied0; struct iax_ie_data ied1; unsigned int transferid = rand(); memset(&ied0, 0, sizeof(ied0)); iax_ie_append_addr(&ied0, IAX_IE_APPARENT_ADDR, &iaxs[callno1]->addr); iax_ie_append_short(&ied0, IAX_IE_CALLNO, iaxs[callno1]->peercallno); iax_ie_append_int(&ied0, IAX_IE_TRANSFERID, transferid); memset(&ied1, 0, sizeof(ied1)); iax_ie_append_addr(&ied1, IAX_IE_APPARENT_ADDR, &iaxs[callno0]->addr); iax_ie_append_short(&ied1, IAX_IE_CALLNO, iaxs[callno0]->peercallno); iax_ie_append_int(&ied1, IAX_IE_TRANSFERID, transferid); res = send_command(iaxs[callno0], AST_FRAME_IAX, IAX_COMMAND_TXREQ, 0, ied0.buf, ied0.pos, -1); if (res) return -1; res = send_command(iaxs[callno1], AST_FRAME_IAX, IAX_COMMAND_TXREQ, 0, ied1.buf, ied1.pos, -1); if (res) return -1; iaxs[callno0]->transferring = TRANSFER_BEGIN; iaxs[callno1]->transferring = TRANSFER_BEGIN; return 0; } static void lock_both(unsigned short callno0, unsigned short callno1) { ast_mutex_lock(&iaxsl[callno0]); while (ast_mutex_trylock(&iaxsl[callno1])) { ast_mutex_unlock(&iaxsl[callno0]); usleep(10); ast_mutex_lock(&iaxsl[callno0]); } } static void unlock_both(unsigned short callno0, unsigned short callno1) { ast_mutex_unlock(&iaxsl[callno1]); ast_mutex_unlock(&iaxsl[callno0]); } static enum ast_bridge_result iax2_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms) { struct ast_channel *cs[3]; struct ast_channel *who; int to = -1; int res = -1; int transferstarted=0; struct ast_frame *f; unsigned short callno0 = PTR_TO_CALLNO(c0->tech_pvt); unsigned short callno1 = PTR_TO_CALLNO(c1->tech_pvt); struct timeval waittimer = {0, 0}, tv; lock_both(callno0, callno1); /* Put them in native bridge mode */ if (!flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1)) { iaxs[callno0]->bridgecallno = callno1; iaxs[callno1]->bridgecallno = callno0; } unlock_both(callno0, callno1); /* If not, try to bridge until we can execute a transfer, if we can */ cs[0] = c0; cs[1] = c1; for (/* ever */;;) { /* Check in case we got masqueraded into */ if ((c0->tech != &iax2_tech) || (c1->tech != &iax2_tech)) { if (option_verbose > 2) ast_verbose(VERBOSE_PREFIX_3 "Can't masquerade, we're different...\n"); /* Remove from native mode */ if (c0->tech == &iax2_tech) { ast_mutex_lock(&iaxsl[callno0]); iaxs[callno0]->bridgecallno = 0; ast_mutex_unlock(&iaxsl[callno0]); } if (c1->tech == &iax2_tech) { ast_mutex_lock(&iaxsl[callno1]); iaxs[callno1]->bridgecallno = 0; ast_mutex_unlock(&iaxsl[callno1]); } return AST_BRIDGE_FAILED_NOWARN; } if (c0->nativeformats != c1->nativeformats) { if (option_verbose > 2) { char buf0[255]; char buf1[255]; ast_getformatname_multiple(buf0, sizeof(buf0) -1, c0->nativeformats); ast_getformatname_multiple(buf1, sizeof(buf1) -1, c1->nativeformats); ast_verbose(VERBOSE_PREFIX_3 "Operating with different codecs %d[%s] %d[%s] , can't native bridge...\n", c0->nativeformats, buf0, c1->nativeformats, buf1); } /* Remove from native mode */ lock_both(callno0, callno1); iaxs[callno0]->bridgecallno = 0; iaxs[callno1]->bridgecallno = 0; unlock_both(callno0, callno1); return AST_BRIDGE_FAILED_NOWARN; } /* check if transfered and if we really want native bridging */ if (!transferstarted && !ast_test_flag(iaxs[callno0], IAX_NOTRANSFER) && !ast_test_flag(iaxs[callno1], IAX_NOTRANSFER) && !(flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))) { /* Try the transfer */ if (iax2_start_transfer(callno0, callno1)) ast_log(LOG_WARNING, "Unable to start the transfer\n"); transferstarted = 1; } if ((iaxs[callno0]->transferring == TRANSFER_RELEASED) && (iaxs[callno1]->transferring == TRANSFER_RELEASED)) { /* Call has been transferred. We're no longer involved */ gettimeofday(&tv, NULL); if (ast_tvzero(waittimer)) { waittimer = tv; } else if (tv.tv_sec - waittimer.tv_sec > IAX_LINGER_TIMEOUT) { c0->_softhangup |= AST_SOFTHANGUP_DEV; c1->_softhangup |= AST_SOFTHANGUP_DEV; *fo = NULL; *rc = c0; res = AST_BRIDGE_COMPLETE; break; } } to = 1000; who = ast_waitfor_n(cs, 2, &to); if (timeoutms > -1) { timeoutms -= (1000 - to); if (timeoutms < 0) timeoutms = 0; } if (!who) { if (!timeoutms) { res = AST_BRIDGE_RETRY; break; } if (ast_check_hangup(c0) || ast_check_hangup(c1)) { res = AST_BRIDGE_FAILED; break; } continue; } f = ast_read(who); if (!f) { *fo = NULL; *rc = who; res = AST_BRIDGE_COMPLETE; break; } if ((f->frametype == AST_FRAME_CONTROL) && !(flags & AST_BRIDGE_IGNORE_SIGS)) { *fo = f; *rc = who; res = AST_BRIDGE_COMPLETE; break; } if ((f->frametype == AST_FRAME_VOICE) || (f->frametype == AST_FRAME_TEXT) || (f->frametype == AST_FRAME_VIDEO) || (f->frametype == AST_FRAME_IMAGE) || (f->frametype == AST_FRAME_DTMF)) { if ((f->frametype == AST_FRAME_DTMF) && (flags & (AST_BRIDGE_DTMF_CHANNEL_0 | AST_BRIDGE_DTMF_CHANNEL_1))) { if ((who == c0)) { if ((flags & AST_BRIDGE_DTMF_CHANNEL_0)) { *rc = c0; *fo = f; res = AST_BRIDGE_COMPLETE; /* Remove from native mode */ break; } else goto tackygoto; } else if ((who == c1)) { if (flags & AST_BRIDGE_DTMF_CHANNEL_1) { *rc = c1; *fo = f; res = AST_BRIDGE_COMPLETE; break; } else goto tackygoto; } } else { #if 0 if (iaxdebug && option_debug) ast_log(LOG_DEBUG, "Read from %s\n", who->name); if (who == last) ast_log(LOG_DEBUG, "Servicing channel %s twice in a row?\n", last->name); last = who; #endif tackygoto: if (who == c0) ast_write(c1, f); else ast_write(c0, f); } ast_frfree(f); } else ast_frfree(f); /* Swap who gets priority */ cs[2] = cs[0]; cs[0] = cs[1]; cs[1] = cs[2]; } lock_both(callno0, callno1); if(iaxs[callno0]) iaxs[callno0]->bridgecallno = 0; if(iaxs[callno1]) iaxs[callno1]->bridgecallno = 0; unlock_both(callno0, callno1); return res; } static int iax2_answer(struct ast_channel *c) { unsigned short callno = PTR_TO_CALLNO(c->tech_pvt); if (option_debug) ast_log(LOG_DEBUG, "Answering IAX2 call\n"); return send_command_locked(callno, AST_FRAME_CONTROL, AST_CONTROL_ANSWER, 0, NULL, 0, -1); } static int iax2_indicate(struct ast_channel *c, int condition) { unsigned short callno = PTR_TO_CALLNO(c->tech_pvt); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Indicating condition %d\n", condition); return send_command_locked(callno, AST_FRAME_CONTROL, condition, 0, NULL, 0, -1); } static int iax2_transfer(struct ast_channel *c, const char *dest) { unsigned short callno = PTR_TO_CALLNO(c->tech_pvt); struct iax_ie_data ied; char tmp[256], *context; ast_copy_string(tmp, dest, sizeof(tmp)); context = strchr(tmp, '@'); if (context) { *context = '\0'; context++; } memset(&ied, 0, sizeof(ied)); iax_ie_append_str(&ied, IAX_IE_CALLED_NUMBER, tmp); if (context) iax_ie_append_str(&ied, IAX_IE_CALLED_CONTEXT, context); if (option_debug) ast_log(LOG_DEBUG, "Transferring '%s' to '%s'\n", c->name, dest); return send_command_locked(callno, AST_FRAME_IAX, IAX_COMMAND_TRANSFER, 0, ied.buf, ied.pos, -1); } static int iax2_write(struct ast_channel *c, struct ast_frame *f); static int iax2_getpeertrunk(struct sockaddr_in sin) { struct iax2_peer *peer; int res = 0; ast_mutex_lock(&peerl.lock); peer = peerl.peers; while(peer) { if ((peer->addr.sin_addr.s_addr == sin.sin_addr.s_addr) && (peer->addr.sin_port == sin.sin_port)) { res = ast_test_flag(peer, IAX_TRUNK); break; } peer = peer->next; } ast_mutex_unlock(&peerl.lock); return res; } /*! \brief Create new call, interface with the PBX core */ static struct ast_channel *ast_iax2_new(int callno, int state, int capability) { struct ast_channel *tmp; struct chan_iax2_pvt *i; struct ast_variable *v = NULL; /* Don't hold call lock */ ast_mutex_unlock(&iaxsl[callno]); tmp = ast_channel_alloc(1); ast_mutex_lock(&iaxsl[callno]); i = iaxs[callno]; if (i && tmp) { tmp->tech = &iax2_tech; ast_string_field_build(tmp, name, "IAX2/%s-%d", i->host, i->callno); /* We can support any format by default, until we get restricted */ tmp->nativeformats = capability; tmp->readformat = ast_best_codec(capability); tmp->writeformat = ast_best_codec(capability); tmp->tech_pvt = CALLNO_TO_PTR(i->callno); if (!ast_strlen_zero(i->cid_num)) tmp->cid.cid_num = ast_strdup(i->cid_num); if (!ast_strlen_zero(i->cid_name)) tmp->cid.cid_name = ast_strdup(i->cid_name); if (!ast_strlen_zero(i->ani)) tmp->cid.cid_ani = ast_strdup(i->ani); if (!ast_strlen_zero(i->language)) ast_string_field_set(tmp, language, i->language); if (!ast_strlen_zero(i->dnid)) tmp->cid.cid_dnid = ast_strdup(i->dnid); if (!ast_strlen_zero(i->rdnis)) tmp->cid.cid_rdnis = ast_strdup(i->rdnis); tmp->cid.cid_pres = i->calling_pres; tmp->cid.cid_ton = i->calling_ton; tmp->cid.cid_tns = i->calling_tns; if (!ast_strlen_zero(i->accountcode)) ast_string_field_set(tmp, accountcode, i->accountcode); if (i->amaflags) tmp->amaflags = i->amaflags; ast_copy_string(tmp->context, i->context, sizeof(tmp->context)); ast_copy_string(tmp->exten, i->exten, sizeof(tmp->exten)); tmp->adsicpe = i->peeradsicpe; i->owner = tmp; i->capability = capability; ast_setstate(tmp, state); ast_mutex_lock(&usecnt_lock); usecnt++; ast_mutex_unlock(&usecnt_lock); ast_update_use_count(); 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; } } for (v = i->vars ; v ; v = v->next) pbx_builtin_setvar_helper(tmp,v->name,v->value); } return tmp; } static unsigned int calc_txpeerstamp(struct iax2_trunk_peer *tpeer, int sampms, struct timeval *tv) { unsigned long int mssincetx; /* unsigned to handle overflows */ long int ms, pred; tpeer->trunkact = *tv; mssincetx = ast_tvdiff_ms(*tv, tpeer->lasttxtime); if (mssincetx > 5000 || ast_tvzero(tpeer->txtrunktime)) { /* If it's been at least 5 seconds since the last time we transmitted on this trunk, reset our timers */ tpeer->txtrunktime = *tv; tpeer->lastsent = 999999; } /* Update last transmit time now */ tpeer->lasttxtime = *tv; /* Calculate ms offset */ ms = ast_tvdiff_ms(*tv, tpeer->txtrunktime); /* Predict from last value */ pred = tpeer->lastsent + sampms; if (abs(ms - pred) < MAX_TIMESTAMP_SKEW) ms = pred; /* We never send the same timestamp twice, so fudge a little if we must */ if (ms == tpeer->lastsent) ms = tpeer->lastsent + 1; tpeer->lastsent = ms; return ms; } static unsigned int fix_peerts(struct timeval *tv, int callno, unsigned int ts) { long ms; /* NOT unsigned */ if (ast_tvzero(iaxs[callno]->rxcore)) { /* Initialize rxcore time if appropriate */ gettimeofday(&iaxs[callno]->rxcore, NULL); /* Round to nearest 20ms so traces look pretty */ iaxs[callno]->rxcore.tv_usec -= iaxs[callno]->rxcore.tv_usec % 20000; } /* Calculate difference between trunk and channel */ ms = ast_tvdiff_ms(*tv, iaxs[callno]->rxcore); /* Return as the sum of trunk time and the difference between trunk and real time */ return ms + ts; } static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, struct ast_frame *f) { int ms; int voice = 0; int genuine = 0; int adjust; struct timeval *delivery = NULL; /* What sort of frame do we have?: voice is self-explanatory "genuine" means an IAX frame - things like LAGRQ/RP, PING/PONG, ACK non-genuine frames are CONTROL frames [ringing etc], DTMF The "genuine" distinction is needed because genuine frames must get a clock-based timestamp, the others need a timestamp slaved to the voice frames so that they go in sequence */ if (f) { if (f->frametype == AST_FRAME_VOICE) { voice = 1; delivery = &f->delivery; } else if (f->frametype == AST_FRAME_IAX) { genuine = 1; } else if (f->frametype == AST_FRAME_CNG) { p->notsilenttx = 0; } } if (ast_tvzero(p->offset)) { gettimeofday(&p->offset, NULL); /* Round to nearest 20ms for nice looking traces */ p->offset.tv_usec -= p->offset.tv_usec % 20000; } /* If the timestamp is specified, just send it as is */ if (ts) return ts; /* If we have a time that the frame arrived, always use it to make our timestamp */ if (delivery && !ast_tvzero(*delivery)) { ms = ast_tvdiff_ms(*delivery, p->offset); if (option_debug > 2 && iaxdebug) ast_log(LOG_DEBUG, "calc_timestamp: call %d/%d: Timestamp slaved to delivery time\n", p->callno, iaxs[p->callno]->peercallno); } else { ms = ast_tvdiff_ms(ast_tvnow(), p->offset); if (ms < 0) ms = 0; if (voice) { /* On a voice frame, use predicted values if appropriate */ if (p->notsilenttx && abs(ms - p->nextpred) <= MAX_TIMESTAMP_SKEW) { /* Adjust our txcore, keeping voice and non-voice synchronized */ /* AN EXPLANATION: When we send voice, we usually send "calculated" timestamps worked out on the basis of the number of samples sent. When we send other frames, we usually send timestamps worked out from the real clock. The problem is that they can tend to drift out of step because the source channel's clock and our clock may not be exactly at the same rate. We fix this by continuously "tweaking" p->offset. p->offset is "time zero" for this call. Moving it adjusts timestamps for non-voice frames. We make the adjustment in the style of a moving average. Each time we adjust p->offset by 10% of the difference between our clock-derived timestamp and the predicted timestamp. That's why you see "10000" below even though IAX2 timestamps are in milliseconds. The use of a moving average avoids offset moving too radically. Generally, "adjust" roams back and forth around 0, with offset hardly changing at all. But if a consistent different starts to develop it will be eliminated over the course of 10 frames (200-300msecs) */ adjust = (ms - p->nextpred); if (adjust < 0) p->offset = ast_tvsub(p->offset, ast_samp2tv(abs(adjust), 10000)); else if (adjust > 0) p->offset = ast_tvadd(p->offset, ast_samp2tv(adjust, 10000)); if (!p->nextpred) { p->nextpred = ms; /*f->samples / 8;*/ if (p->nextpred <= p->lastsent) p->nextpred = p->lastsent + 3; } ms = p->nextpred; } else { /* in this case, just use the actual * time, since we're either way off * (shouldn't happen), or we're ending a * silent period -- and seed the next * predicted time. Also, round ms to the * next multiple of frame size (so our * silent periods are multiples of * frame size too) */ if (iaxdebug && abs(ms - p->nextpred) > MAX_TIMESTAMP_SKEW ) ast_log(LOG_DEBUG, "predicted timestamp skew (%u) > max (%u), using real ts instead.\n", abs(ms - p->nextpred), MAX_TIMESTAMP_SKEW); if (f->samples >= 8) /* check to make sure we dont core dump */ { int diff = ms % (f->samples / 8); if (diff) ms += f->samples/8 - diff; } p->nextpred = ms; p->notsilenttx = 1; } } else { /* On a dataframe, use last value + 3 (to accomodate jitter buffer shrinking) if appropriate unless it's a genuine frame */ if (genuine) { /* genuine (IAX LAGRQ etc) must keep their clock-based stamps */ if (ms <= p->lastsent) ms = p->lastsent + 3; } else if (abs(ms - p->lastsent) <= MAX_TIMESTAMP_SKEW) { /* non-genuine frames (!?) (DTMF, CONTROL) should be pulled into the predicted stream stamps */ ms = p->lastsent + 3; } } } p->lastsent = ms; if (voice) p->nextpred = p->nextpred + f->samples / 8; #if 0 printf("TS: %s - %dms\n", voice ? "Audio" : "Control", ms); #endif return ms; } #ifdef BRIDGE_OPTIMIZATION static unsigned int calc_fakestamp(struct chan_iax2_pvt *p1, struct chan_iax2_pvt *p2, unsigned int fakets) { int ms; /* Receive from p1, send to p2 */ /* Setup rxcore if necessary on outgoing channel */ if (ast_tvzero(p1->rxcore)) p1->rxcore = ast_tvnow(); /* Setup txcore if necessary on outgoing channel */ if (ast_tvzero(p2->offset)) p2->offset = ast_tvnow(); /* Now, ts is the timestamp of the original packet in the orignal context. Adding rxcore to it gives us when we would want the packet to be delivered normally. Subtracting txcore of the outgoing channel gives us what we'd expect */ ms = ast_tvdiff_ms(p1->rxcore, p2->offset); fakets += ms; p2->lastsent = fakets; return fakets; } #endif static unsigned int calc_rxstamp(struct chan_iax2_pvt *p, unsigned int offset) { /* Returns where in "receive time" we are. That is, how many ms since we received (or would have received) the frame with timestamp 0 */ int ms; #ifdef IAXTESTS int jit; #endif /* IAXTESTS */ /* Setup rxcore if necessary */ if (ast_tvzero(p->rxcore)) { p->rxcore = ast_tvnow(); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "calc_rxstamp: call=%d: rxcore set to %d.%6.6d - %dms\n", p->callno, (int)(p->rxcore.tv_sec), (int)(p->rxcore.tv_usec), offset); p->rxcore = ast_tvsub(p->rxcore, ast_samp2tv(offset, 1000)); #if 1 if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "calc_rxstamp: call=%d: works out as %d.%6.6d\n", p->callno, (int)(p->rxcore.tv_sec),(int)( p->rxcore.tv_usec)); #endif } ms = ast_tvdiff_ms(ast_tvnow(), p->rxcore); #ifdef IAXTESTS if (test_jit) { if (!test_jitpct || ((100.0 * rand() / (RAND_MAX + 1.0)) < test_jitpct)) { jit = (int)((float)test_jit * rand() / (RAND_MAX + 1.0)); if ((int)(2.0 * rand() / (RAND_MAX + 1.0))) jit = -jit; ms += jit; } } if (test_late) { ms += test_late; test_late = 0; } #endif /* IAXTESTS */ return ms; } static struct iax2_trunk_peer *find_tpeer(struct sockaddr_in *sin, int fd) { struct iax2_trunk_peer *tpeer; char iabuf[INET_ADDRSTRLEN]; /* Finds and locks trunk peer */ ast_mutex_lock(&tpeerlock); tpeer = tpeers; while(tpeer) { /* We don't lock here because tpeer->addr *never* changes */ if (!inaddrcmp(&tpeer->addr, sin)) { ast_mutex_lock(&tpeer->lock); break; } tpeer = tpeer->next; } if (!tpeer) { if ((tpeer = ast_calloc(1, sizeof(*tpeer)))) { ast_mutex_init(&tpeer->lock); tpeer->lastsent = 9999; memcpy(&tpeer->addr, sin, sizeof(tpeer->addr)); tpeer->trunkact = ast_tvnow(); ast_mutex_lock(&tpeer->lock); tpeer->next = tpeers; tpeer->sockfd = fd; tpeers = tpeer; #ifdef SO_NO_CHECK setsockopt(tpeer->sockfd, SOL_SOCKET, SO_NO_CHECK, &nochecksums, sizeof(nochecksums)); #endif ast_log(LOG_DEBUG, "Created trunk peer for '%s:%d'\n", ast_inet_ntoa(iabuf, sizeof(iabuf), tpeer->addr.sin_addr), ntohs(tpeer->addr.sin_port)); } } ast_mutex_unlock(&tpeerlock); return tpeer; } static int iax2_trunk_queue(struct chan_iax2_pvt *pvt, struct iax_frame *fr) { struct ast_frame *f; struct iax2_trunk_peer *tpeer; void *tmp, *ptr; struct ast_iax2_meta_trunk_entry *met; struct ast_iax2_meta_trunk_mini *mtm; char iabuf[INET_ADDRSTRLEN]; f = &fr->af; tpeer = find_tpeer(&pvt->addr, pvt->sockfd); if (tpeer) { if (tpeer->trunkdatalen + f->datalen + 4 >= tpeer->trunkdataalloc) { /* Need to reallocate space */ if (tpeer->trunkdataalloc < MAX_TRUNKDATA) { if (!(tmp = ast_realloc(tpeer->trunkdata, tpeer->trunkdataalloc + DEFAULT_TRUNKDATA + IAX2_TRUNK_PREFACE))) { ast_mutex_unlock(&tpeer->lock); return -1; } tpeer->trunkdataalloc += DEFAULT_TRUNKDATA; tpeer->trunkdata = tmp; ast_log(LOG_DEBUG, "Expanded trunk '%s:%d' to %d bytes\n", ast_inet_ntoa(iabuf, sizeof(iabuf), tpeer->addr.sin_addr), ntohs(tpeer->addr.sin_port), tpeer->trunkdataalloc); } else { ast_log(LOG_WARNING, "Maximum trunk data space exceeded to %s:%d\n", ast_inet_ntoa(iabuf, sizeof(iabuf), tpeer->addr.sin_addr), ntohs(tpeer->addr.sin_port)); ast_mutex_unlock(&tpeer->lock); return -1; } } /* Append to meta frame */ ptr = tpeer->trunkdata + IAX2_TRUNK_PREFACE + tpeer->trunkdatalen; if (ast_test_flag(&globalflags, IAX_TRUNKTIMESTAMPS)) { mtm = (struct ast_iax2_meta_trunk_mini *)ptr; mtm->len = htons(f->datalen); mtm->mini.callno = htons(pvt->callno); mtm->mini.ts = htons(0xffff & fr->ts); ptr += sizeof(struct ast_iax2_meta_trunk_mini); tpeer->trunkdatalen += sizeof(struct ast_iax2_meta_trunk_mini); } else { met = (struct ast_iax2_meta_trunk_entry *)ptr; /* Store call number and length in meta header */ met->callno = htons(pvt->callno); met->len = htons(f->datalen); /* Advance pointers/decrease length past trunk entry header */ ptr += sizeof(struct ast_iax2_meta_trunk_entry); tpeer->trunkdatalen += sizeof(struct ast_iax2_meta_trunk_entry); } /* Copy actual trunk data */ memcpy(ptr, f->data, f->datalen); tpeer->trunkdatalen += f->datalen; tpeer->calls++; ast_mutex_unlock(&tpeer->lock); } return 0; } static void build_enc_keys(const unsigned char *digest, aes_encrypt_ctx *ecx, aes_decrypt_ctx *dcx) { aes_encrypt_key128(digest, ecx); aes_decrypt_key128(digest, dcx); } static void memcpy_decrypt(unsigned char *dst, const unsigned char *src, int len, aes_decrypt_ctx *dcx) { #if 0 /* Debug with "fake encryption" */ int x; if (len % 16) ast_log(LOG_WARNING, "len should be multiple of 16, not %d!\n", len); for (x=0;x 0) { aes_decrypt(src, dst, dcx); for (x=0;x<16;x++) dst[x] ^= lastblock[x]; memcpy(lastblock, src, sizeof(lastblock)); dst += 16; src += 16; len -= 16; } #endif } static void memcpy_encrypt(unsigned char *dst, const unsigned char *src, int len, aes_encrypt_ctx *ecx) { #if 0 /* Debug with "fake encryption" */ int x; if (len % 16) ast_log(LOG_WARNING, "len should be multiple of 16, not %d!\n", len); for (x=0;x 0) { for (x=0;x<16;x++) curblock[x] ^= src[x]; aes_encrypt(curblock, dst, ecx); memcpy(curblock, dst, sizeof(curblock)); dst += 16; src += 16; len -= 16; } #endif } static int decode_frame(aes_decrypt_ctx *dcx, struct ast_iax2_full_hdr *fh, struct ast_frame *f, int *datalen) { int padding; unsigned char *workspace; workspace = alloca(*datalen); if (!workspace) return -1; if (ntohs(fh->scallno) & IAX_FLAG_FULL) { struct ast_iax2_full_enc_hdr *efh = (struct ast_iax2_full_enc_hdr *)fh; if (*datalen < 16 + sizeof(struct ast_iax2_full_hdr)) return -1; /* Decrypt */ memcpy_decrypt(workspace, efh->encdata, *datalen - sizeof(struct ast_iax2_full_enc_hdr), dcx); padding = 16 + (workspace[15] & 0xf); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Decoding full frame with length %d (padding = %d) (15=%02x)\n", *datalen, padding, workspace[15]); if (*datalen < padding + sizeof(struct ast_iax2_full_hdr)) return -1; *datalen -= padding; memcpy(efh->encdata, workspace + padding, *datalen - sizeof(struct ast_iax2_full_enc_hdr)); f->frametype = fh->type; if (f->frametype == AST_FRAME_VIDEO) { f->subclass = uncompress_subclass(fh->csub & ~0x40) | ((fh->csub >> 6) & 0x1); } else { f->subclass = uncompress_subclass(fh->csub); } } else { struct ast_iax2_mini_enc_hdr *efh = (struct ast_iax2_mini_enc_hdr *)fh; if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Decoding mini with length %d\n", *datalen); if (*datalen < 16 + sizeof(struct ast_iax2_mini_hdr)) return -1; /* Decrypt */ memcpy_decrypt(workspace, efh->encdata, *datalen - sizeof(struct ast_iax2_mini_enc_hdr), dcx); padding = 16 + (workspace[15] & 0x0f); if (*datalen < padding + sizeof(struct ast_iax2_mini_hdr)) return -1; *datalen -= padding; memcpy(efh->encdata, workspace + padding, *datalen - sizeof(struct ast_iax2_mini_enc_hdr)); } return 0; } static int encrypt_frame(aes_encrypt_ctx *ecx, struct ast_iax2_full_hdr *fh, unsigned char *poo, int *datalen) { int padding; unsigned char *workspace; workspace = alloca(*datalen + 32); if (!workspace) return -1; if (ntohs(fh->scallno) & IAX_FLAG_FULL) { struct ast_iax2_full_enc_hdr *efh = (struct ast_iax2_full_enc_hdr *)fh; if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Encoding full frame %d/%d with length %d\n", fh->type, fh->csub, *datalen); padding = 16 - ((*datalen - sizeof(struct ast_iax2_full_enc_hdr)) % 16); padding = 16 + (padding & 0xf); memcpy(workspace, poo, padding); memcpy(workspace + padding, efh->encdata, *datalen - sizeof(struct ast_iax2_full_enc_hdr)); workspace[15] &= 0xf0; workspace[15] |= (padding & 0xf); if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Encoding full frame %d/%d with length %d + %d padding (15=%02x)\n", fh->type, fh->csub, *datalen, padding, workspace[15]); *datalen += padding; memcpy_encrypt(efh->encdata, workspace, *datalen - sizeof(struct ast_iax2_full_enc_hdr), ecx); if (*datalen >= 32 + sizeof(struct ast_iax2_full_enc_hdr)) memcpy(poo, workspace + *datalen - 32, 32); } else { struct ast_iax2_mini_enc_hdr *efh = (struct ast_iax2_mini_enc_hdr *)fh; if (option_debug && iaxdebug) ast_log(LOG_DEBUG, "Encoding mini frame with length %d\n", *datalen); padding = 16 - ((*datalen - sizeof(struct ast_iax2_mini_enc_hdr)) % 16); padding = 16 + (padding & 0xf); memcpy(workspace, poo, padding); memcpy(workspace + padding, efh->encdata, *datalen - sizeof(struct ast_iax2_mini_enc_hdr)); workspace[15] &= 0xf0; workspace[15] |= (padding & 0x0f); *datalen += padding; memcpy_encrypt(efh->encdata, workspace, *datalen - sizeof(struct ast_iax2_mini_enc_hdr), ecx); if (*datalen >= 32 + sizeof(struct ast_iax2_mini_enc_hdr)) memcpy(poo, workspace + *datalen - 32, 32); } return 0; } static int decrypt_frame(int callno, struct ast_iax2_full_hdr *fh, struct ast_frame *f, int *datalen) { int res=-1; if (!ast_test_flag(iaxs[callno], IAX_KEYPOPULATED)) { /* Search for possible keys, given secrets */ struct MD5Context md5; unsigned char digest[16]; char *tmppw, *stringp; tmppw = ast_strdupa(iaxs[callno]->secret); stringp = tmppw; while((tmppw = strsep(&stringp, ";"))) { MD5Init(&md5); MD5Update(&md5, (unsigned char *)iaxs[callno]->challenge, strlen(iaxs[callno]->challenge)); MD5Update(&md5, (unsigned char *)tmppw, strlen(tmppw)); MD5Final(digest, &md5); build_enc_keys(digest, &iaxs[callno]->ecx, &iaxs[callno]->dcx); res = decode_frame(&iaxs[callno]->dcx, fh, f, datalen); if (!res) { ast_set_flag(iaxs[callno], IAX_KEYPOPULATED); break; } } } else res = decode_frame(&iaxs[callno]->dcx, fh, f, datalen); return res; } static int iax2_send(struct chan_iax2_pvt *pvt, struct ast_frame *f, unsigned int ts, int seqno, int now, int transfer, int final) { /* Queue a packet for delivery on a given private structure. Use "ts" for timestamp, or calculate if ts is 0. Send immediately without retransmission or delayed, with retransmission */ struct ast_iax2_full_hdr *fh; struct ast_iax2_mini_hdr *mh; struct ast_iax2_video_hdr *vh; struct { struct iax_frame fr2; unsigned char buffer[4096]; } frb; struct iax_frame *fr; int res; int sendmini=0; unsigned int lastsent; unsigned int fts; if (!pvt) { ast_log(LOG_WARNING, "No private structure for packet?\n"); return -1; } lastsent = pvt->lastsent; /* Calculate actual timestamp */ fts = calc_timestamp(pvt, ts, f); /* Bail here if this is an "interp" frame; we don't want or need to send these placeholders out * (the endpoint should detect the lost packet itself). But, we want to do this here, so that we * increment the "predicted timestamps" for voice, if we're predecting */ if(f->frametype == AST_FRAME_VOICE && f->datalen == 0) return 0; if ((ast_test_flag(pvt, IAX_TRUNK) || ((fts & 0xFFFF0000L) == (lastsent & 0xFFFF0000L))) /* High two bytes are the same on timestamp, or sending on a trunk */ && (f->frametype == AST_FRAME_VOICE) /* is a voice frame */ && (f->subclass == pvt->svoiceformat) /* is the same type */ ) { /* Force immediate rather than delayed transmission */ now = 1; /* Mark that mini-style frame is appropriate */ sendmini = 1; } if (((fts & 0xFFFF8000L) == (lastsent & 0xFFFF8000L)) && (f->frametype == AST_FRAME_VIDEO) && ((f->subclass & ~0x1) == pvt->svideoformat)) { now = 1; sendmini = 1; } /* Allocate an iax_frame */ if (now) { fr = &frb.fr2; } else fr = iax_frame_new(DIRECTION_OUTGRESS, ast_test_flag(pvt, IAX_ENCRYPTED) ? f->datalen + 32 : f->datalen); if (!fr) { ast_log(LOG_WARNING, "Out of memory\n"); return -1; } /* Copy our prospective frame into our immediate or retransmitted wrapper */ iax_frame_wrap(fr, f); fr->ts = fts; fr->callno = pvt->callno; fr->transfer = transfer; fr->final = final; if (!sendmini) { /* We need a full frame */ if (seqno > -1) fr->oseqno = seqno; else fr->oseqno = pvt->oseqno++; fr->iseqno = pvt->iseqno; fh = (struct ast_iax2_full_hdr *)(fr->af.data - sizeof(struct ast_iax2_full_hdr)); fh->scallno = htons(fr->callno | IAX_FLAG_FULL); fh->ts = htonl(fr->ts); fh->oseqno = fr->oseqno; if (transfer) { fh->iseqno = 0; } else fh->iseqno = fr->iseqno; /* Keep track of the last thing we've acknowledged */ if (!transfer) pvt->aseqno = fr->iseqno; fh->type = fr->af.frametype & 0xFF; if (fr->af.frametype == AST_FRAME_VIDEO) fh->csub = compress_subclass(fr->af.subclass & ~0x1) | ((fr->af.subclass & 0x1) << 6); else fh->csub = compress_subclass(fr->af.subclass); if (transfer) { fr->dcallno = pvt->transfercallno; } else fr->dcallno = pvt->peercallno; fh->dcallno = htons(fr->dcallno); fr->datalen = fr->af.datalen + sizeof(struct ast_iax2_full_hdr); fr->data = fh; fr->retries = 0; /* Retry after 2x the ping time has passed */ fr->retrytime = pvt->pingtime * 2; if (fr->retrytime < MIN_RETRY_TIME) fr->retrytime = MIN_RETRY_TIME; if (fr->retrytime > MAX_RETRY_TIME) fr->retrytime = MAX_RETRY_TIME; /* Acks' don't get retried */ if ((f->frametype == AST_FRAME_IAX) && (f->subclass == IAX_COMMAND_ACK)) fr->retries = -1; else if (f->frametype == AST_FRAME_VOICE) pvt->svoiceformat = f->subclass; else if (f->frametype == AST_FRAME_VIDEO) pvt->svideoformat = f->subclass & ~0x1; if (ast_test_flag(pvt, IAX_ENCRYPTED)) { if (ast_test_flag(pvt, IAX_KEYPOPULATED)) { if (iaxdebug) { if (fr->transfer) iax_showframe(fr, NULL, 2, &pvt->transfer, fr->datalen - sizeof(struct ast_iax2_full_hdr)); else iax_showframe(fr, NULL, 2, &pvt->addr, fr->datalen - sizeof(struct ast_iax2_full_hdr)); } encrypt_frame(&pvt->ecx, fh, pvt->semirand, &fr->datalen); } else ast_log(LOG_WARNING, "Supposed to send packet encrypted, but no key?\n"); } if (now) { res = send_packet(fr); } else res = iax2_transmit(fr); } else { if (ast_test_flag(pvt, IAX_TRUNK)) { iax2_trunk_queue(pvt, fr); res = 0; } else if (fr->af.frametype == AST_FRAME_VIDEO) { /* Video frame have no sequence number */ fr->oseqno = -1; fr->iseqno = -1; vh = (struct ast_iax2_video_hdr *)(fr->af.data - sizeof(struct ast_iax2_video_hdr)); vh->zeros = 0; vh->callno = htons(0x8000 | fr->callno); vh->ts = htons((fr->ts & 0x7FFF) | (fr->af.subclass & 0x1 ? 0x8000 : 0)); fr->datalen = fr->af.datalen + sizeof(struct ast_iax2_video_hdr); fr->data = vh; fr->retries = -1; res = send_packet(fr); } else { /* Mini-frames have no sequence number */ fr->oseqno = -1; fr->iseqno = -1; /* Mini frame will do */ mh = (struct ast_iax2_mini_hdr *)(fr->af.data - sizeof(struct ast_iax2_mini_hdr)); mh->callno = htons(fr->callno); mh->ts = htons(fr->ts & 0xFFFF); fr->datalen = fr->af.datalen + sizeof(struct ast_iax2_mini_hdr); fr->data = mh; fr->retries = -1; if (ast_test_flag(pvt, IAX_ENCRYPTED)) { if (ast_test_flag(pvt, IAX_KEYPOPULATED)) { encrypt_frame(&pvt->ecx, (struct ast_iax2_full_hdr *)mh, pvt->semirand, &fr->datalen); } else ast_log(LOG_WARNING, "Supposed to send packet encrypted, but no key?\n"); } res = send_packet(fr); } } return res; } static int iax2_show_users(int fd, int argc, char *argv[]) { regex_t regexbuf; int havepattern = 0; #define FORMAT "%-15.15s %-20.20s %-15.15s %-15.15s %-5.5s %-5.10s\n" #define FORMAT2 "%-15.15s %-20.20s %-15.15d %-15.15s %-5.5s %-5.10s\n" struct iax2_user *user; char auth[90]; char *pstr = ""; switch (argc) { case 5: if (!strcasecmp(argv[3], "like")) { if (regcomp(®exbuf, argv[4], REG_EXTENDED | REG_NOSUB)) return RESULT_SHOWUSAGE; havepattern = 1; } else return RESULT_SHOWUSAGE; case 3: break; default: return RESULT_SHOWUSAGE; } ast_mutex_lock(&userl.lock); ast_cli(fd, FORMAT, "Username", "Secret", "Authen", "Def.Context", "A/C","Codec Pref"); for(user=userl.users;user;user=user->next) { if (havepattern && regexec(®exbuf, user->name, 0, NULL, 0)) continue; if (!ast_strlen_zero(user->secret)) { ast_copy_string(auth,user->secret,sizeof(auth)); } else if (!ast_strlen_zero(user->inkeys)) { snprintf(auth, sizeof(auth), "Key: %-15.15s ", user->inkeys); } else ast_copy_string(auth, "-no secret-", sizeof(auth)); if(ast_test_flag(user,IAX_CODEC_NOCAP)) pstr = "REQ Only"; else if(ast_test_flag(user,IAX_CODEC_NOPREFS)) pstr = "Disabled"; else pstr = ast_test_flag(user,IAX_CODEC_USER_FIRST) ? "Caller" : "Host"; ast_cli(fd, FORMAT2, user->name, auth, user->authmethods, user->contexts ? user->contexts->context : context, user->ha ? "Yes" : "No", pstr); } ast_mutex_unlock(&userl.lock); if (havepattern) regfree(®exbuf); return RESULT_SUCCESS; #undef FORMAT #undef FORMAT2 } static int __iax2_show_peers(int manager, int fd, struct mansession *s, int argc, char *argv[]) { regex_t regexbuf; int havepattern = 0; int total_peers = 0; int online_peers = 0; int offline_peers = 0; int unmonitored_peers = 0; #define FORMAT2 "%-15.15s %-15.15s %s %-15.15s %-8s %s %-10s%s" #define FORMAT "%-15.15s %-15.15s %s %-15.15s %-5d%s %s %-10s%s" struct iax2_peer *peer; char name[256]; char iabuf[INET_ADDRSTRLEN]; int registeredonly=0; char *term = manager ? "\r\n" : "\n"; switch (argc) { case 6: if (!strcasecmp(argv[3], "registered")) registeredonly = 1; else return RESULT_SHOWUSAGE; if (!strcasecmp(argv[4], "like")) { if (regcomp(®exbuf, argv[5], REG_EXTENDED | REG_NOSUB)) return RESULT_SHOWUSAGE; havepattern = 1; } else return RESULT_SHOWUSAGE; break; case 5: if (!strcasecmp(argv[3], "like")) { if (regcomp(®exbuf, argv[4], REG_EXTENDED | REG_NOSUB)) return RESULT_SHOWUSAGE; havepattern = 1; } else return RESULT_SHOWUSAGE; break; case 4: if (!strcasecmp(argv[3], "registered")) registeredonly = 1; else return RESULT_SHOWUSAGE; break; case 3: break; default: return RESULT_SHOWUSAGE; } ast_mutex_lock(&peerl.lock); if (s) astman_append(s, FORMAT2, "Name/Username", "Host", " ", "Mask", "Port", " ", "Status", term); else ast_cli(fd, FORMAT2, "Name/Username", "Host", " ", "Mask", "Port", " ", "Status", term); for (peer = peerl.peers;peer;peer = peer->next) { char nm[20]; char status[20]; char srch[2000]; int retstatus; if (registeredonly && !peer->addr.sin_addr.s_addr) continue; if (havepattern && regexec(®exbuf, peer->name, 0, NULL, 0)) continue; if (!ast_strlen_zero(peer->username)) snprintf(name, sizeof(name), "%s/%s", peer->name, peer->username); else ast_copy_string(name, peer->name, sizeof(name)); retstatus = peer_status(peer, status, sizeof(status)); if (retstatus > 0) online_peers++; else if (!retstatus) offline_peers++; else unmonitored_peers++; ast_copy_string(nm, ast_inet_ntoa(iabuf, sizeof(iabuf), peer->mask), sizeof(nm)); snprintf(srch, sizeof(srch), FORMAT, name, peer->addr.sin_addr.s_addr ? ast_inet_ntoa(iabuf, sizeof(i