git migration: Refactor the ASTERISK_FILE_VERSION macro
[asterisk/asterisk.git] / main / channel_internal_api.c
index 6fc116a..a2fafbf 100644 (file)
  * \author Terry Wilson
  */
 
+/*** MODULEINFO
+       <support_level>core</support_level>
+ ***/
+
 #include "asterisk.h"
 
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+ASTERISK_REGISTER_FILE()
+
+#include <unistd.h>
+#include <fcntl.h>
 
+#include "asterisk/paths.h"
 #include "asterisk/channel.h"
-#include "asterisk/stringfields.h"
+#include "asterisk/channel_internal.h"
 #include "asterisk/data.h"
+#include "asterisk/endpoints.h"
 #include "asterisk/indications.h"
+#include "asterisk/stasis_cache_pattern.h"
+#include "asterisk/stasis_channels.h"
+#include "asterisk/stasis_endpoints.h"
+#include "asterisk/stringfields.h"
+#include "asterisk/test.h"
+
+/*!
+ * \brief Channel UniqueId structure
+ * \note channel creation time used for determining LinkedId Propagation
+ */
+struct ast_channel_id {
+       time_t creation_time;                           /*!< Creation time */
+       int creation_unique;                            /*!< sub-second unique value */
+       char unique_id[AST_MAX_UNIQUEID];       /*!< Unique Identifier */
+};
+
+/*!
+ * \brief Main Channel structure associated with a channel.
+ *
+ * \note When adding fields to this structure, it is important to add the field
+ *       'in position' with like-aligned fields, so as to keep the compiler from
+ *       having to add padding to align fields. The structure's fields are sorted
+ *       in this order: pointers, structures, long, int/enum, short, char. This
+ *       is especially important on 64-bit architectures, where mixing 4-byte
+ *       and 8-byte fields causes 4 bytes of padding to be added before many
+ *       8-byte fields.
+ */
+struct ast_channel {
+       const struct ast_channel_tech *tech;            /*!< Technology (point to channel driver) */
+       void *tech_pvt;                                 /*!< Private data used by the technology driver */
+       void *music_state;                              /*!< Music State*/
+       void *generatordata;                            /*!< Current generator data if there is any */
+       struct ast_generator *generator;                /*!< Current active data generator */
+       struct ast_channel *masq;                       /*!< Channel that will masquerade as us */
+       struct ast_channel *masqr;                      /*!< Who we are masquerading as */
+       const char *blockproc;                          /*!< Procedure causing blocking */
+       const char *appl;                               /*!< Current application */
+       const char *data;                               /*!< Data passed to current application */
+       struct ast_sched_context *sched;                /*!< Schedule context */
+       struct ast_filestream *stream;                  /*!< Stream itself. */
+       struct ast_filestream *vstream;                 /*!< Video Stream itself. */
+       ast_timing_func_t timingfunc;
+       void *timingdata;
+       struct ast_pbx *pbx;                            /*!< PBX private structure for this channel */
+       struct ast_trans_pvt *writetrans;               /*!< Write translation path */
+       struct ast_trans_pvt *readtrans;                /*!< Read translation path */
+       struct ast_audiohook_list *audiohooks;
+       struct ast_framehook_list *framehooks;
+       struct ast_cdr *cdr;                            /*!< Call Detail Record */
+       struct ast_tone_zone *zone;                     /*!< Tone zone as set in indications.conf or
+                                                        *   in the CHANNEL dialplan function */
+       struct ast_channel_monitor *monitor;            /*!< Channel monitoring */
+       ast_callid callid;                      /*!< Bound call identifier pointer */
+#ifdef HAVE_EPOLL
+       struct ast_epoll_data *epfd_data[AST_MAX_FDS];
+#endif
+       struct ao2_container *dialed_causes;            /*!< Contains tech-specific and Asterisk cause data from dialed channels */
+
+       AST_DECLARE_STRING_FIELDS(
+               AST_STRING_FIELD(name);         /*!< ASCII unique channel name */
+               AST_STRING_FIELD(language);     /*!< Language requested for voice prompts */
+               AST_STRING_FIELD(musicclass);   /*!< Default music class */
+               AST_STRING_FIELD(latest_musicclass);   /*!< Latest active music class */
+               AST_STRING_FIELD(accountcode);  /*!< Account code for billing */
+               AST_STRING_FIELD(peeraccount);  /*!< Peer account code for billing */
+               AST_STRING_FIELD(userfield);    /*!< Userfield for CEL billing */
+               AST_STRING_FIELD(call_forward); /*!< Where to forward to if asked to dial on this interface */
+               AST_STRING_FIELD(parkinglot);   /*! Default parking lot, if empty, default parking lot  */
+               AST_STRING_FIELD(hangupsource); /*! Who is responsible for hanging up this channel */
+               AST_STRING_FIELD(dialcontext);  /*!< Dial: Extension context that we were called from */
+       );
+
+       struct ast_channel_id uniqueid;         /*!< Unique Channel Identifier - can be specified on creation */
+       struct ast_channel_id linkedid;         /*!< Linked Channel Identifier - oldest propagated when bridged */
+
+       struct timeval whentohangup; /*!< Non-zero, set to actual time when channel is to be hung up */
+       pthread_t blocker;           /*!< If anyone is blocking, this is them */
+
+       /*!
+        * \brief Dialed/Called information.
+        * \note Set on incoming channels to indicate the originally dialed party.
+        * \note Dialed Number Identifier (DNID)
+        */
+       struct ast_party_dialed dialed;
+
+       /*!
+        * \brief Channel Caller ID information.
+        * \note The caller id information is the caller id of this
+        * channel when it is used to initiate a call.
+        */
+       struct ast_party_caller caller;
+
+       /*!
+        * \brief Channel Connected Line ID information.
+        * \note The connected line information identifies the channel
+        * connected/bridged to this channel.
+        */
+       struct ast_party_connected_line connected;
+
+       /*!
+        * \brief Channel Connected Line ID information that was last indicated.
+        */
+       struct ast_party_connected_line connected_indicated;
+
+       /*! \brief Redirecting/Diversion information */
+       struct ast_party_redirecting redirecting;
+
+       struct ast_frame dtmff;                         /*!< DTMF frame */
+       struct varshead varshead;                       /*!< A linked list for channel variables. See \ref AstChanVar */
+       ast_group_t callgroup;                          /*!< Call group for call pickups */
+       ast_group_t pickupgroup;                        /*!< Pickup group - which calls groups can be picked up? */
+       struct ast_namedgroups *named_callgroups;       /*!< Named call group for call pickups */
+       struct ast_namedgroups *named_pickupgroups;     /*!< Named pickup group - which call groups can be picked up? */
+       struct timeval creationtime;                    /*!< The time of channel creation */
+       struct timeval answertime;                              /*!< The time the channel was answered */
+       struct ast_readq_list readq;
+       struct ast_jb jb;                               /*!< The jitterbuffer state */
+       struct timeval dtmf_tv;                         /*!< The time that an in process digit began, or the last digit ended */
+       struct ast_hangup_handler_list hangup_handlers;/*!< Hangup handlers on the channel. */
+       struct ast_datastore_list datastores; /*!< Data stores on the channel */
+       struct ast_autochan_list autochans; /*!< Autochans on the channel */
+       unsigned long insmpl;                           /*!< Track the read/written samples for monitor use */
+       unsigned long outsmpl;                          /*!< Track the read/written samples for monitor use */
+
+       int fds[AST_MAX_FDS];                           /*!< File descriptors for channel -- Drivers will poll on
+                                                        *   these file descriptors, so at least one must be non -1.
+                                                        *   See \arg \ref AstFileDesc */
+       int softhangup;                         /*!< Whether or not we have been hung up...  Do not set this value
+                                                        *   directly, use ast_softhangup() */
+       int unbridged;              /*!< If non-zero, the bridge core needs to re-evaluate the current
+                                        bridging technology which is in use by this channel's bridge. */
+       int fdno;                                       /*!< Which fd had an event detected on */
+       int streamid;                                   /*!< For streaming playback, the schedule ID */
+       int vstreamid;                                  /*!< For streaming video playback, the schedule ID */
+       struct ast_format *oldwriteformat;  /*!< Original writer format */
+       int timingfd;                                   /*!< Timing fd */
+       enum ast_channel_state state;                   /*!< State of line -- Don't write directly, use ast_setstate() */
+       int rings;                                      /*!< Number of rings so far */
+       int priority;                                   /*!< Dialplan: Current extension priority */
+       int macropriority;                              /*!< Macro: Current non-macro priority. See app_macro.c */
+       int amaflags;                                   /*!< Set BEFORE PBX is started to determine AMA flags */
+       enum ast_channel_adsicpe adsicpe;               /*!< Whether or not ADSI is detected on CPE */
+       unsigned int fin;                               /*!< Frames in counters. The high bit is a debug mask, so
+                                                        *   the counter is only in the remaining bits */
+       unsigned int fout;                              /*!< Frames out counters. The high bit is a debug mask, so
+                                                        *   the counter is only in the remaining bits */
+       int hangupcause;                                /*!< Why is the channel hanged up. See causes.h */
+       unsigned int finalized:1;       /*!< Whether or not the channel has been successfully allocated */
+       struct ast_flags flags;                         /*!< channel flags of AST_FLAG_ type */
+       int alertpipe[2];
+       struct ast_format_cap *nativeformats;         /*!< Kinds of data this channel can natively handle */
+       struct ast_format *readformat;            /*!< Requested read format (after translation) */
+       struct ast_format *writeformat;           /*!< Requested write format (before translation) */
+       struct ast_format *rawreadformat;         /*!< Raw read format (before translation) */
+       struct ast_format *rawwriteformat;        /*!< Raw write format (after translation) */
+       unsigned int emulate_dtmf_duration;             /*!< Number of ms left to emulate DTMF for */
+#ifdef HAVE_EPOLL
+       int epfd;
+#endif
+       int visible_indication;                         /*!< Indication currently playing on the channel */
+       int hold_state;                                                 /*!< Current Hold/Unhold state */
+
+       unsigned short transfercapability;              /*!< ISDN Transfer Capability - AST_FLAG_DIGITAL is not enough */
+
+       struct ast_bridge *bridge;                      /*!< Bridge this channel is participating in */
+       struct ast_bridge_channel *bridge_channel;/*!< The bridge_channel this channel is linked with. */
+       struct ast_timer *timer;                        /*!< timer object that provided timingfd */
+
+       char context[AST_MAX_CONTEXT];                  /*!< Dialplan: Current extension context */
+       char exten[AST_MAX_EXTENSION];                  /*!< Dialplan: Current extension number */
+       char macrocontext[AST_MAX_CONTEXT];             /*!< Macro: Current non-macro context. See app_macro.c */
+       char macroexten[AST_MAX_EXTENSION];             /*!< Macro: Current non-macro extension. See app_macro.c */
+       char dtmf_digit_to_emulate;                     /*!< Digit being emulated */
+       char sending_dtmf_digit;                        /*!< Digit this channel is currently sending out. (zero if not sending) */
+       struct timeval sending_dtmf_tv;         /*!< The time this channel started sending the current digit. (Invalid if sending_dtmf_digit is zero.) */
+       struct stasis_cp_single *topics;                /*!< Topic for all channel's events */
+       struct stasis_forward *endpoint_forward;        /*!< Subscription for event forwarding to endpoint's topic */
+       struct stasis_forward *endpoint_cache_forward; /*!< Subscription for cache updates to endpoint's topic */
+};
+
+/*! \brief The monotonically increasing integer counter for channel uniqueids */
+static int uniqueint;
 
 /* AST_DATA definitions, which will probably have to be re-thought since the channel will be opaque */
 
@@ -52,21 +243,19 @@ AST_DATA_STRUCTURE(ast_callerid, DATA_EXPORT_CALLERID);
 #endif
 
 #define DATA_EXPORT_CHANNEL(MEMBER)                                            \
-       MEMBER(ast_channel, __do_not_use_blockproc, AST_DATA_STRING)                            \
-       MEMBER(ast_channel, __do_not_use_appl, AST_DATA_STRING)                         \
-       MEMBER(ast_channel, __do_not_use_data, AST_DATA_STRING)                         \
-       MEMBER(ast_channel, __do_not_use_name, AST_DATA_STRING) \
-       MEMBER(ast_channel, __do_not_use_language, AST_DATA_STRING)                             \
-       MEMBER(ast_channel, __do_not_use_musicclass, AST_DATA_STRING)                   \
-       MEMBER(ast_channel, __do_not_use_accountcode, AST_DATA_STRING)                  \
-       MEMBER(ast_channel, __do_not_use_peeraccount, AST_DATA_STRING)                  \
-       MEMBER(ast_channel, __do_not_use_userfield, AST_DATA_STRING)                            \
-       MEMBER(ast_channel, __do_not_use_call_forward, AST_DATA_STRING)                 \
-       MEMBER(ast_channel, __do_not_use_uniqueid, AST_DATA_STRING)                             \
-       MEMBER(ast_channel, __do_not_use_linkedid, AST_DATA_STRING)                             \
-       MEMBER(ast_channel, __do_not_use_parkinglot, AST_DATA_STRING)                   \
-       MEMBER(ast_channel, __do_not_use_hangupsource, AST_DATA_STRING)                 \
-       MEMBER(ast_channel, __do_not_use_dialcontext, AST_DATA_STRING)                  \
+       MEMBER(ast_channel, blockproc, AST_DATA_STRING)                         \
+       MEMBER(ast_channel, appl, AST_DATA_STRING)                              \
+       MEMBER(ast_channel, data, AST_DATA_STRING)                              \
+       MEMBER(ast_channel, name, AST_DATA_STRING) \
+       MEMBER(ast_channel, language, AST_DATA_STRING)                          \
+       MEMBER(ast_channel, musicclass, AST_DATA_STRING)                        \
+       MEMBER(ast_channel, accountcode, AST_DATA_STRING)                       \
+       MEMBER(ast_channel, peeraccount, AST_DATA_STRING)                       \
+       MEMBER(ast_channel, userfield, AST_DATA_STRING)                         \
+       MEMBER(ast_channel, call_forward, AST_DATA_STRING)                      \
+       MEMBER(ast_channel, parkinglot, AST_DATA_STRING)                        \
+       MEMBER(ast_channel, hangupsource, AST_DATA_STRING)                      \
+       MEMBER(ast_channel, dialcontext, AST_DATA_STRING)                       \
        MEMBER(ast_channel, rings, AST_DATA_INTEGER)                            \
        MEMBER(ast_channel, priority, AST_DATA_INTEGER)                         \
        MEMBER(ast_channel, macropriority, AST_DATA_INTEGER)                    \
@@ -75,40 +264,40 @@ AST_DATA_STRUCTURE(ast_callerid, DATA_EXPORT_CALLERID);
        MEMBER(ast_channel, fout, AST_DATA_UNSIGNED_INTEGER)                    \
        MEMBER(ast_channel, emulate_dtmf_duration, AST_DATA_UNSIGNED_INTEGER)   \
        MEMBER(ast_channel, visible_indication, AST_DATA_INTEGER)               \
-       MEMBER(ast_channel, __do_not_use_context, AST_DATA_STRING)                              \
-       MEMBER(ast_channel, __do_not_use_exten, AST_DATA_STRING)                                \
-       MEMBER(ast_channel, __do_not_use_macrocontext, AST_DATA_STRING)                 \
-       MEMBER(ast_channel, __do_not_use_macroexten, AST_DATA_STRING)
+       MEMBER(ast_channel, context, AST_DATA_STRING)                           \
+       MEMBER(ast_channel, exten, AST_DATA_STRING)                             \
+       MEMBER(ast_channel, macrocontext, AST_DATA_STRING)                      \
+       MEMBER(ast_channel, macroexten, AST_DATA_STRING)
 
 AST_DATA_STRUCTURE(ast_channel, DATA_EXPORT_CHANNEL);
 
 static void channel_data_add_flags(struct ast_data *tree,
        struct ast_channel *chan)
 {
-       ast_data_add_bool(tree, "DEFER_DTMF", ast_test_flag(chan, AST_FLAG_DEFER_DTMF));
-       ast_data_add_bool(tree, "WRITE_INT", ast_test_flag(chan, AST_FLAG_WRITE_INT));
-       ast_data_add_bool(tree, "BLOCKING", ast_test_flag(chan, AST_FLAG_BLOCKING));
-       ast_data_add_bool(tree, "ZOMBIE", ast_test_flag(chan, AST_FLAG_ZOMBIE));
-       ast_data_add_bool(tree, "EXCEPTION", ast_test_flag(chan, AST_FLAG_EXCEPTION));
-       ast_data_add_bool(tree, "MOH", ast_test_flag(chan, AST_FLAG_MOH));
-       ast_data_add_bool(tree, "SPYING", ast_test_flag(chan, AST_FLAG_SPYING));
-       ast_data_add_bool(tree, "NBRIDGE", ast_test_flag(chan, AST_FLAG_NBRIDGE));
-       ast_data_add_bool(tree, "IN_AUTOLOOP", ast_test_flag(chan, AST_FLAG_IN_AUTOLOOP));
-       ast_data_add_bool(tree, "OUTGOING", ast_test_flag(chan, AST_FLAG_OUTGOING));
-       ast_data_add_bool(tree, "IN_DTMF", ast_test_flag(chan, AST_FLAG_IN_DTMF));
-       ast_data_add_bool(tree, "EMULATE_DTMF", ast_test_flag(chan, AST_FLAG_EMULATE_DTMF));
-       ast_data_add_bool(tree, "END_DTMF_ONLY", ast_test_flag(chan, AST_FLAG_END_DTMF_ONLY));
-       ast_data_add_bool(tree, "ANSWERED_ELSEWHERE", ast_test_flag(chan, AST_FLAG_ANSWERED_ELSEWHERE));
-       ast_data_add_bool(tree, "MASQ_NOSTREAM", ast_test_flag(chan, AST_FLAG_MASQ_NOSTREAM));
-       ast_data_add_bool(tree, "BRIDGE_HANGUP_RUN", ast_test_flag(chan, AST_FLAG_BRIDGE_HANGUP_RUN));
-       ast_data_add_bool(tree, "BRIDGE_HANGUP_DONT", ast_test_flag(chan, AST_FLAG_BRIDGE_HANGUP_DONT));
-       ast_data_add_bool(tree, "DISABLE_WORKAROUNDS", ast_test_flag(chan, AST_FLAG_DISABLE_WORKAROUNDS));
+       ast_data_add_bool(tree, "DEFER_DTMF", ast_test_flag(ast_channel_flags(chan), AST_FLAG_DEFER_DTMF));
+       ast_data_add_bool(tree, "WRITE_INT", ast_test_flag(ast_channel_flags(chan), AST_FLAG_WRITE_INT));
+       ast_data_add_bool(tree, "BLOCKING", ast_test_flag(ast_channel_flags(chan), AST_FLAG_BLOCKING));
+       ast_data_add_bool(tree, "ZOMBIE", ast_test_flag(ast_channel_flags(chan), AST_FLAG_ZOMBIE));
+       ast_data_add_bool(tree, "EXCEPTION", ast_test_flag(ast_channel_flags(chan), AST_FLAG_EXCEPTION));
+       ast_data_add_bool(tree, "MOH", ast_test_flag(ast_channel_flags(chan), AST_FLAG_MOH));
+       ast_data_add_bool(tree, "SPYING", ast_test_flag(ast_channel_flags(chan), AST_FLAG_SPYING));
+       ast_data_add_bool(tree, "IN_AUTOLOOP", ast_test_flag(ast_channel_flags(chan), AST_FLAG_IN_AUTOLOOP));
+       ast_data_add_bool(tree, "OUTGOING", ast_test_flag(ast_channel_flags(chan), AST_FLAG_OUTGOING));
+       ast_data_add_bool(tree, "IN_DTMF", ast_test_flag(ast_channel_flags(chan), AST_FLAG_IN_DTMF));
+       ast_data_add_bool(tree, "EMULATE_DTMF", ast_test_flag(ast_channel_flags(chan), AST_FLAG_EMULATE_DTMF));
+       ast_data_add_bool(tree, "END_DTMF_ONLY", ast_test_flag(ast_channel_flags(chan), AST_FLAG_END_DTMF_ONLY));
+       ast_data_add_bool(tree, "MASQ_NOSTREAM", ast_test_flag(ast_channel_flags(chan), AST_FLAG_MASQ_NOSTREAM));
+       ast_data_add_bool(tree, "BRIDGE_HANGUP_RUN", ast_test_flag(ast_channel_flags(chan), AST_FLAG_BRIDGE_HANGUP_RUN));
+       ast_data_add_bool(tree, "DISABLE_WORKAROUNDS", ast_test_flag(ast_channel_flags(chan), AST_FLAG_DISABLE_WORKAROUNDS));
+       ast_data_add_bool(tree, "DISABLE_DEVSTATE_CACHE", ast_test_flag(ast_channel_flags(chan), AST_FLAG_DISABLE_DEVSTATE_CACHE));
+       ast_data_add_bool(tree, "BRIDGE_DUAL_REDIRECT_WAIT", ast_test_flag(ast_channel_flags(chan), AST_FLAG_BRIDGE_DUAL_REDIRECT_WAIT));
+       ast_data_add_bool(tree, "ORIGINATED", ast_test_flag(ast_channel_flags(chan), AST_FLAG_ORIGINATED));
+       ast_data_add_bool(tree, "DEAD", ast_test_flag(ast_channel_flags(chan), AST_FLAG_DEAD));
 }
 
 int ast_channel_data_add_structure(struct ast_data *tree,
        struct ast_channel *chan, int add_bridged)
 {
-       struct ast_channel *bc;
        struct ast_data *data_bridged;
        struct ast_data *data_cdr;
        struct ast_data *data_flags;
@@ -127,7 +316,7 @@ int ast_channel_data_add_structure(struct ast_data *tree,
        ast_data_add_structure(ast_channel, tree, chan);
 
        if (add_bridged) {
-               bc = ast_bridged_channel(chan);
+               RAII_VAR(struct ast_channel *, bc, ast_channel_bridge_peer(chan), ast_channel_cleanup);
                if (bc) {
                        data_bridged = ast_data_add_node(tree, "bridged");
                        if (!data_bridged) {
@@ -137,57 +326,59 @@ int ast_channel_data_add_structure(struct ast_data *tree,
                }
        }
 
-       ast_data_add_codec(tree, "oldwriteformat", &chan->oldwriteformat);
-       ast_data_add_codec(tree, "readformat", &chan->readformat);
-       ast_data_add_codec(tree, "writeformat", &chan->writeformat);
-       ast_data_add_codec(tree, "rawreadformat", &chan->rawreadformat);
-       ast_data_add_codec(tree, "rawwriteformat", &chan->rawwriteformat);
-       ast_data_add_codecs(tree, "nativeformats", chan->nativeformats);
+       ast_data_add_str(tree, "uniqueid", ast_channel_uniqueid(chan));
+       ast_data_add_str(tree, "linkedid", ast_channel_linkedid(chan));
+
+       ast_data_add_codec(tree, "oldwriteformat", ast_channel_oldwriteformat(chan));
+       ast_data_add_codec(tree, "readformat", ast_channel_readformat(chan));
+       ast_data_add_codec(tree, "writeformat", ast_channel_writeformat(chan));
+       ast_data_add_codec(tree, "rawreadformat", ast_channel_rawreadformat(chan));
+       ast_data_add_codec(tree, "rawwriteformat", ast_channel_rawwriteformat(chan));
+       ast_data_add_codecs(tree, "nativeformats", ast_channel_nativeformats(chan));
 
        /* state */
        enum_node = ast_data_add_node(tree, "state");
        if (!enum_node) {
                return -1;
        }
-       ast_data_add_str(enum_node, "text", ast_state2str(chan->_state));
-       ast_data_add_int(enum_node, "value", chan->_state);
+       ast_data_add_str(enum_node, "text", ast_state2str(ast_channel_state(chan)));
+       ast_data_add_int(enum_node, "value", ast_channel_state(chan));
 
        /* hangupcause */
        enum_node = ast_data_add_node(tree, "hangupcause");
        if (!enum_node) {
                return -1;
        }
-       ast_data_add_str(enum_node, "text", ast_cause2str(chan->hangupcause));
-       ast_data_add_int(enum_node, "value", chan->hangupcause);
+       ast_data_add_str(enum_node, "text", ast_cause2str(ast_channel_hangupcause(chan)));
+       ast_data_add_int(enum_node, "value", ast_channel_hangupcause(chan));
 
        /* amaflags */
        enum_node = ast_data_add_node(tree, "amaflags");
        if (!enum_node) {
                return -1;
        }
-       ast_data_add_str(enum_node, "text", ast_cdr_flags2str(chan->amaflags));
-       ast_data_add_int(enum_node, "value", chan->amaflags);
+       ast_data_add_str(enum_node, "text", ast_channel_amaflags2string(ast_channel_amaflags(chan)));
+       ast_data_add_int(enum_node, "value", ast_channel_amaflags(chan));
 
        /* transfercapability */
        enum_node = ast_data_add_node(tree, "transfercapability");
        if (!enum_node) {
                return -1;
        }
-       ast_data_add_str(enum_node, "text", ast_transfercapability2str(chan->transfercapability));
-       ast_data_add_int(enum_node, "value", chan->transfercapability);
+       ast_data_add_str(enum_node, "text", ast_transfercapability2str(ast_channel_transfercapability(chan)));
+       ast_data_add_int(enum_node, "value", ast_channel_transfercapability(chan));
 
        /* _softphangup */
        data_softhangup = ast_data_add_node(tree, "softhangup");
        if (!data_softhangup) {
                return -1;
        }
-       ast_data_add_bool(data_softhangup, "dev", chan->_softhangup & AST_SOFTHANGUP_DEV);
-       ast_data_add_bool(data_softhangup, "asyncgoto", chan->_softhangup & AST_SOFTHANGUP_ASYNCGOTO);
-       ast_data_add_bool(data_softhangup, "shutdown", chan->_softhangup & AST_SOFTHANGUP_SHUTDOWN);
-       ast_data_add_bool(data_softhangup, "timeout", chan->_softhangup & AST_SOFTHANGUP_TIMEOUT);
-       ast_data_add_bool(data_softhangup, "appunload", chan->_softhangup & AST_SOFTHANGUP_APPUNLOAD);
-       ast_data_add_bool(data_softhangup, "explicit", chan->_softhangup & AST_SOFTHANGUP_EXPLICIT);
-       ast_data_add_bool(data_softhangup, "unbridge", chan->_softhangup & AST_SOFTHANGUP_UNBRIDGE);
+       ast_data_add_bool(data_softhangup, "dev", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_DEV);
+       ast_data_add_bool(data_softhangup, "asyncgoto", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_ASYNCGOTO);
+       ast_data_add_bool(data_softhangup, "shutdown", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_SHUTDOWN);
+       ast_data_add_bool(data_softhangup, "timeout", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_TIMEOUT);
+       ast_data_add_bool(data_softhangup, "appunload", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_APPUNLOAD);
+       ast_data_add_bool(data_softhangup, "explicit", ast_channel_softhangup_internal_flag(chan) & AST_SOFTHANGUP_EXPLICIT);
 
        /* channel flags */
        data_flags = ast_data_add_node(tree, "flags");
@@ -196,7 +387,7 @@ int ast_channel_data_add_structure(struct ast_data *tree,
        }
        channel_data_add_flags(data_flags, chan);
 
-       ast_data_add_uint(tree, "timetohangup", chan->whentohangup.tv_sec);
+       ast_data_add_uint(tree, "timetohangup", ast_channel_whentohangup(chan)->tv_sec);
 
 #if 0  /* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
        /* callerid */
@@ -218,12 +409,12 @@ int ast_channel_data_add_structure(struct ast_data *tree,
 #endif
 
        /* tone zone */
-       if (chan->zone) {
+       if (ast_channel_zone(chan)) {
                data_zones = ast_data_add_node(tree, "zone");
                if (!data_zones) {
                        return -1;
                }
-               ast_tone_zone_data_add_structure(data_zones, chan->zone);
+               ast_tone_zone_data_add_structure(data_zones, ast_channel_zone(chan));
        }
 
        /* insert cdr */
@@ -232,8 +423,6 @@ int ast_channel_data_add_structure(struct ast_data *tree,
                return -1;
        }
 
-       ast_cdr_data_add_structure(data_cdr, chan->cdr, 1);
-
        return 0;
 }
 
@@ -245,15 +434,19 @@ int ast_channel_data_cmp_structure(const struct ast_data_search *tree,
 
 /* ACCESSORS */
 
-#define DEFINE_STRINGFIELD_SETTERS_FOR(field) \
+#define DEFINE_STRINGFIELD_SETTERS_FOR(field, publish, assert_on_null) \
 void ast_channel_##field##_set(struct ast_channel *chan, const char *value) \
 { \
-       ast_string_field_set(chan, __do_not_use_##field, value); \
+       if ((assert_on_null)) ast_assert(!ast_strlen_zero(value)); \
+       if (!strcmp(value, chan->field)) return; \
+       ast_string_field_set(chan, field, value); \
+       if (publish && ast_channel_internal_is_finalized(chan)) ast_channel_publish_snapshot(chan); \
 } \
   \
 void ast_channel_##field##_build_va(struct ast_channel *chan, const char *fmt, va_list ap) \
 { \
-       ast_string_field_build_va(chan, __do_not_use_##field, fmt, ap); \
+       ast_string_field_build_va(chan, field, fmt, ap); \
+       if (publish && ast_channel_internal_is_finalized(chan)) ast_channel_publish_snapshot(chan); \
 } \
 void ast_channel_##field##_build(struct ast_channel *chan, const char *fmt, ...) \
 { \
@@ -263,92 +456,1173 @@ void ast_channel_##field##_build(struct ast_channel *chan, const char *fmt, ...)
        va_end(ap); \
 }
 
-DEFINE_STRINGFIELD_SETTERS_FOR(name)
-DEFINE_STRINGFIELD_SETTERS_FOR(language)
-DEFINE_STRINGFIELD_SETTERS_FOR(musicclass)
-DEFINE_STRINGFIELD_SETTERS_FOR(accountcode)
-DEFINE_STRINGFIELD_SETTERS_FOR(peeraccount)
-DEFINE_STRINGFIELD_SETTERS_FOR(userfield)
-DEFINE_STRINGFIELD_SETTERS_FOR(call_forward)
-DEFINE_STRINGFIELD_SETTERS_FOR(uniqueid)
-DEFINE_STRINGFIELD_SETTERS_FOR(linkedid)
-DEFINE_STRINGFIELD_SETTERS_FOR(parkinglot)
-DEFINE_STRINGFIELD_SETTERS_FOR(hangupsource)
-DEFINE_STRINGFIELD_SETTERS_FOR(dialcontext)
+DEFINE_STRINGFIELD_SETTERS_FOR(name, 0, 1);
+DEFINE_STRINGFIELD_SETTERS_FOR(language, 1, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(musicclass, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(latest_musicclass, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(accountcode, 1, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(peeraccount, 1, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(userfield, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(call_forward, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(parkinglot, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(hangupsource, 0, 0);
+DEFINE_STRINGFIELD_SETTERS_FOR(dialcontext, 0, 0);
 
 #define DEFINE_STRINGFIELD_GETTER_FOR(field) const char *ast_channel_##field(const struct ast_channel *chan) \
 { \
-       return chan->__do_not_use_##field; \
-}
-
-DEFINE_STRINGFIELD_GETTER_FOR(name)
-DEFINE_STRINGFIELD_GETTER_FOR(language)
-DEFINE_STRINGFIELD_GETTER_FOR(musicclass)
-DEFINE_STRINGFIELD_GETTER_FOR(accountcode)
-DEFINE_STRINGFIELD_GETTER_FOR(peeraccount)
-DEFINE_STRINGFIELD_GETTER_FOR(userfield)
-DEFINE_STRINGFIELD_GETTER_FOR(call_forward)
-DEFINE_STRINGFIELD_GETTER_FOR(uniqueid)
-DEFINE_STRINGFIELD_GETTER_FOR(linkedid)
-DEFINE_STRINGFIELD_GETTER_FOR(parkinglot)
-DEFINE_STRINGFIELD_GETTER_FOR(hangupsource)
-DEFINE_STRINGFIELD_GETTER_FOR(dialcontext)
+       return chan->field; \
+}
+
+DEFINE_STRINGFIELD_GETTER_FOR(name);
+DEFINE_STRINGFIELD_GETTER_FOR(language);
+DEFINE_STRINGFIELD_GETTER_FOR(musicclass);
+DEFINE_STRINGFIELD_GETTER_FOR(latest_musicclass);
+DEFINE_STRINGFIELD_GETTER_FOR(accountcode);
+DEFINE_STRINGFIELD_GETTER_FOR(peeraccount);
+DEFINE_STRINGFIELD_GETTER_FOR(userfield);
+DEFINE_STRINGFIELD_GETTER_FOR(call_forward);
+DEFINE_STRINGFIELD_GETTER_FOR(parkinglot);
+DEFINE_STRINGFIELD_GETTER_FOR(hangupsource);
+DEFINE_STRINGFIELD_GETTER_FOR(dialcontext);
+
+const char *ast_channel_uniqueid(const struct ast_channel *chan)
+{
+       ast_assert(chan->uniqueid.unique_id[0] != '\0');
+       return chan->uniqueid.unique_id;
+}
+
+const char *ast_channel_linkedid(const struct ast_channel *chan)
+{
+       ast_assert(chan->linkedid.unique_id[0] != '\0');
+       return chan->linkedid.unique_id;
+}
 
 const char *ast_channel_appl(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_appl;
+       return chan->appl;
 }
 void ast_channel_appl_set(struct ast_channel *chan, const char *value)
 {
-       chan->__do_not_use_appl = value;
+       chan->appl = value;
 }
 const char *ast_channel_blockproc(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_blockproc;
+       return chan->blockproc;
 }
 void ast_channel_blockproc_set(struct ast_channel *chan, const char *value)
 {
-       chan->__do_not_use_blockproc = value;
+       chan->blockproc = value;
 }
 const char *ast_channel_data(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_data;
+       return chan->data;
 }
 void ast_channel_data_set(struct ast_channel *chan, const char *value)
 {
-       chan->__do_not_use_data = value;
+       chan->data = value;
 }
 
-
 const char *ast_channel_context(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_context;
+       return chan->context;
 }
 void ast_channel_context_set(struct ast_channel *chan, const char *value)
 {
-       ast_copy_string(chan->__do_not_use_context, value, sizeof(chan->__do_not_use_context));
+       ast_copy_string(chan->context, value, sizeof(chan->context));
 }
 const char *ast_channel_exten(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_exten;
+       return chan->exten;
 }
 void ast_channel_exten_set(struct ast_channel *chan, const char *value)
 {
-       ast_copy_string(chan->__do_not_use_exten, value, sizeof(chan->__do_not_use_exten));
+       ast_copy_string(chan->exten, value, sizeof(chan->exten));
 }
 const char *ast_channel_macrocontext(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_macrocontext;
+       return chan->macrocontext;
 }
 void ast_channel_macrocontext_set(struct ast_channel *chan, const char *value)
 {
-       ast_copy_string(chan->__do_not_use_macrocontext, value, sizeof(chan->__do_not_use_macrocontext));
+       ast_copy_string(chan->macrocontext, value, sizeof(chan->macrocontext));
 }
 const char *ast_channel_macroexten(const struct ast_channel *chan)
 {
-       return chan->__do_not_use_macroexten;
+       return chan->macroexten;
 }
 void ast_channel_macroexten_set(struct ast_channel *chan, const char *value)
 {
-       ast_copy_string(chan->__do_not_use_macroexten, value, sizeof(chan->__do_not_use_macroexten));
+       ast_copy_string(chan->macroexten, value, sizeof(chan->macroexten));
+}
+
+char ast_channel_dtmf_digit_to_emulate(const struct ast_channel *chan)
+{
+       return chan->dtmf_digit_to_emulate;
+}
+void ast_channel_dtmf_digit_to_emulate_set(struct ast_channel *chan, char value)
+{
+       chan->dtmf_digit_to_emulate = value;
+}
+
+char ast_channel_sending_dtmf_digit(const struct ast_channel *chan)
+{
+       return chan->sending_dtmf_digit;
+}
+void ast_channel_sending_dtmf_digit_set(struct ast_channel *chan, char value)
+{
+       chan->sending_dtmf_digit = value;
+}
+
+struct timeval ast_channel_sending_dtmf_tv(const struct ast_channel *chan)
+{
+       return chan->sending_dtmf_tv;
+}
+void ast_channel_sending_dtmf_tv_set(struct ast_channel *chan, struct timeval value)
+{
+       chan->sending_dtmf_tv = value;
+}
+
+enum ama_flags ast_channel_amaflags(const struct ast_channel *chan)
+{
+       return chan->amaflags;
+}
+
+void ast_channel_amaflags_set(struct ast_channel *chan, enum ama_flags value)
+{
+       if (chan->amaflags == value) {
+               return;
+       }
+       chan->amaflags = value;
+       ast_channel_publish_snapshot(chan);
+}
+
+#ifdef HAVE_EPOLL
+int ast_channel_epfd(const struct ast_channel *chan)
+{
+       return chan->epfd;
+}
+void ast_channel_epfd_set(struct ast_channel *chan, int value)
+{
+       chan->epfd = value;
+}
+#endif
+int ast_channel_fdno(const struct ast_channel *chan)
+{
+       return chan->fdno;
+}
+void ast_channel_fdno_set(struct ast_channel *chan, int value)
+{
+       chan->fdno = value;
+}
+int ast_channel_hangupcause(const struct ast_channel *chan)
+{
+       return chan->hangupcause;
+}
+void ast_channel_hangupcause_set(struct ast_channel *chan, int value)
+{
+       chan->hangupcause = value;
+}
+int ast_channel_macropriority(const struct ast_channel *chan)
+{
+       return chan->macropriority;
+}
+void ast_channel_macropriority_set(struct ast_channel *chan, int value)
+{
+       chan->macropriority = value;
+}
+int ast_channel_priority(const struct ast_channel *chan)
+{
+       return chan->priority;
+}
+void ast_channel_priority_set(struct ast_channel *chan, int value)
+{
+       chan->priority = value;
+}
+int ast_channel_rings(const struct ast_channel *chan)
+{
+       return chan->rings;
+}
+void ast_channel_rings_set(struct ast_channel *chan, int value)
+{
+       chan->rings = value;
+}
+int ast_channel_streamid(const struct ast_channel *chan)
+{
+       return chan->streamid;
+}
+void ast_channel_streamid_set(struct ast_channel *chan, int value)
+{
+       chan->streamid = value;
+}
+int ast_channel_timingfd(const struct ast_channel *chan)
+{
+       return chan->timingfd;
+}
+void ast_channel_timingfd_set(struct ast_channel *chan, int value)
+{
+       chan->timingfd = value;
+}
+int ast_channel_visible_indication(const struct ast_channel *chan)
+{
+       return chan->visible_indication;
+}
+void ast_channel_visible_indication_set(struct ast_channel *chan, int value)
+{
+       chan->visible_indication = value;
+}
+int ast_channel_hold_state(const struct ast_channel *chan)
+{
+       return chan->hold_state;
+}
+void ast_channel_hold_state_set(struct ast_channel *chan, int value)
+{
+       chan->hold_state = value;
+}
+int ast_channel_vstreamid(const struct ast_channel *chan)
+{
+       return chan->vstreamid;
+}
+void ast_channel_vstreamid_set(struct ast_channel *chan, int value)
+{
+       chan->vstreamid = value;
+}
+unsigned short ast_channel_transfercapability(const struct ast_channel *chan)
+{
+       return chan->transfercapability;
+}
+void ast_channel_transfercapability_set(struct ast_channel *chan, unsigned short value)
+{
+       chan->transfercapability = value;
+}
+unsigned int ast_channel_emulate_dtmf_duration(const struct ast_channel *chan)
+{
+       return chan->emulate_dtmf_duration;
+}
+void ast_channel_emulate_dtmf_duration_set(struct ast_channel *chan, unsigned int value)
+{
+       chan->emulate_dtmf_duration = value;
+}
+unsigned int ast_channel_fin(const struct ast_channel *chan)
+{
+       return chan->fin;
+}
+void ast_channel_fin_set(struct ast_channel *chan, unsigned int value)
+{
+       chan->fin = value;
+}
+unsigned int ast_channel_fout(const struct ast_channel *chan)
+{
+       return chan->fout;
+}
+void ast_channel_fout_set(struct ast_channel *chan, unsigned int value)
+{
+       chan->fout = value;
+}
+unsigned long ast_channel_insmpl(const struct ast_channel *chan)
+{
+       return chan->insmpl;
+}
+void ast_channel_insmpl_set(struct ast_channel *chan, unsigned long value)
+{
+       chan->insmpl = value;
+}
+unsigned long ast_channel_outsmpl(const struct ast_channel *chan)
+{
+       return chan->outsmpl;
+}
+void ast_channel_outsmpl_set(struct ast_channel *chan, unsigned long value)
+{
+       chan->outsmpl = value;
+}
+void *ast_channel_generatordata(const struct ast_channel *chan)
+{
+       return chan->generatordata;
+}
+void ast_channel_generatordata_set(struct ast_channel *chan, void *value)
+{
+       chan->generatordata = value;
+}
+void *ast_channel_music_state(const struct ast_channel *chan)
+{
+       return chan->music_state;
+}
+void ast_channel_music_state_set(struct ast_channel *chan, void *value)
+{
+       chan->music_state = value;
+}
+void *ast_channel_tech_pvt(const struct ast_channel *chan)
+{
+       return chan->tech_pvt;
+}
+void ast_channel_tech_pvt_set(struct ast_channel *chan, void *value)
+{
+       chan->tech_pvt = value;
+}
+void *ast_channel_timingdata(const struct ast_channel *chan)
+{
+       return chan->timingdata;
+}
+void ast_channel_timingdata_set(struct ast_channel *chan, void *value)
+{
+       chan->timingdata = value;
+}
+struct ast_audiohook_list *ast_channel_audiohooks(const struct ast_channel *chan)
+{
+       return chan->audiohooks;
+}
+void ast_channel_audiohooks_set(struct ast_channel *chan, struct ast_audiohook_list *value)
+{
+       chan->audiohooks = value;
+}
+struct ast_cdr *ast_channel_cdr(const struct ast_channel *chan)
+{
+       return chan->cdr;
+}
+void ast_channel_cdr_set(struct ast_channel *chan, struct ast_cdr *value)
+{
+       chan->cdr = value;
+}
+struct ast_channel *ast_channel_masq(const struct ast_channel *chan)
+{
+       return chan->masq;
+}
+void ast_channel_masq_set(struct ast_channel *chan, struct ast_channel *value)
+{
+       chan->masq = value;
+}
+struct ast_channel *ast_channel_masqr(const struct ast_channel *chan)
+{
+       return chan->masqr;
+}
+void ast_channel_masqr_set(struct ast_channel *chan, struct ast_channel *value)
+{
+       chan->masqr = value;
+}
+struct ast_channel_monitor *ast_channel_monitor(const struct ast_channel *chan)
+{
+       return chan->monitor;
+}
+void ast_channel_monitor_set(struct ast_channel *chan, struct ast_channel_monitor *value)
+{
+       chan->monitor = value;
+}
+struct ast_filestream *ast_channel_stream(const struct ast_channel *chan)
+{
+       return chan->stream;
+}
+void ast_channel_stream_set(struct ast_channel *chan, struct ast_filestream *value)
+{
+       chan->stream = value;
+}
+struct ast_filestream *ast_channel_vstream(const struct ast_channel *chan)
+{
+       return chan->vstream;
+}
+void ast_channel_vstream_set(struct ast_channel *chan, struct ast_filestream *value)
+{
+       chan->vstream = value;
+}
+struct ast_format_cap *ast_channel_nativeformats(const struct ast_channel *chan)
+{
+       return chan->nativeformats;
+}
+void ast_channel_nativeformats_set(struct ast_channel *chan, struct ast_format_cap *value)
+{
+       ao2_replace(chan->nativeformats, value);
+}
+struct ast_framehook_list *ast_channel_framehooks(const struct ast_channel *chan)
+{
+       return chan->framehooks;
+}
+void ast_channel_framehooks_set(struct ast_channel *chan, struct ast_framehook_list *value)
+{
+       chan->framehooks = value;
+}
+struct ast_generator *ast_channel_generator(const struct ast_channel *chan)
+{
+       return chan->generator;
+}
+void ast_channel_generator_set(struct ast_channel *chan, struct ast_generator *value)
+{
+       chan->generator = value;
+}
+struct ast_pbx *ast_channel_pbx(const struct ast_channel *chan)
+{
+       return chan->pbx;
+}
+void ast_channel_pbx_set(struct ast_channel *chan, struct ast_pbx *value)
+{
+       chan->pbx = value;
+}
+struct ast_sched_context *ast_channel_sched(const struct ast_channel *chan)
+{
+       return chan->sched;
+}
+void ast_channel_sched_set(struct ast_channel *chan, struct ast_sched_context *value)
+{
+       chan->sched = value;
+}
+struct ast_timer *ast_channel_timer(const struct ast_channel *chan)
+{
+       return chan->timer;
+}
+void ast_channel_timer_set(struct ast_channel *chan, struct ast_timer *value)
+{
+       chan->timer = value;
+}
+struct ast_tone_zone *ast_channel_zone(const struct ast_channel *chan)
+{
+       return chan->zone;
+}
+void ast_channel_zone_set(struct ast_channel *chan, struct ast_tone_zone *value)
+{
+       chan->zone = value;
+}
+struct ast_trans_pvt *ast_channel_readtrans(const struct ast_channel *chan)
+{
+       return chan->readtrans;
+}
+void ast_channel_readtrans_set(struct ast_channel *chan, struct ast_trans_pvt *value)
+{
+       chan->readtrans = value;
+}
+struct ast_trans_pvt *ast_channel_writetrans(const struct ast_channel *chan)
+{
+       return chan->writetrans;
+}
+void ast_channel_writetrans_set(struct ast_channel *chan, struct ast_trans_pvt *value)
+{
+       chan->writetrans = value;
+}
+const struct ast_channel_tech *ast_channel_tech(const struct ast_channel *chan)
+{
+       return chan->tech;
+}
+void ast_channel_tech_set(struct ast_channel *chan, const struct ast_channel_tech *value)
+{
+       chan->tech = value;
+}
+enum ast_channel_adsicpe ast_channel_adsicpe(const struct ast_channel *chan)
+{
+       return chan->adsicpe;
+}
+void ast_channel_adsicpe_set(struct ast_channel *chan, enum ast_channel_adsicpe value)
+{
+       chan->adsicpe = value;
+}
+enum ast_channel_state ast_channel_state(const struct ast_channel *chan)
+{
+       return chan->state;
+}
+ast_callid ast_channel_callid(const struct ast_channel *chan)
+{
+       return chan->callid;
+}
+void ast_channel_callid_set(struct ast_channel *chan, ast_callid callid)
+{
+       char call_identifier_from[AST_CALLID_BUFFER_LENGTH];
+       char call_identifier_to[AST_CALLID_BUFFER_LENGTH];
+       call_identifier_from[0] = '\0';
+       ast_callid_strnprint(call_identifier_to, sizeof(call_identifier_to), callid);
+       if (chan->callid) {
+               ast_callid_strnprint(call_identifier_from, sizeof(call_identifier_from), chan->callid);
+               ast_debug(3, "Channel Call ID changing from %s to %s\n", call_identifier_from, call_identifier_to);
+       }
+
+       chan->callid = callid;
+
+       ast_test_suite_event_notify("CallIDChange",
+               "State: CallIDChange\r\n"
+               "Channel: %s\r\n"
+               "CallID: %s\r\n"
+               "PriorCallID: %s",
+               ast_channel_name(chan),
+               call_identifier_to,
+               call_identifier_from);
+}
+
+void ast_channel_state_set(struct ast_channel *chan, enum ast_channel_state value)
+{
+       chan->state = value;
+}
+void ast_channel_set_oldwriteformat(struct ast_channel *chan, struct ast_format *format)
+{
+       ao2_replace(chan->oldwriteformat, format);
+}
+void ast_channel_set_rawreadformat(struct ast_channel *chan, struct ast_format *format)
+{
+       ao2_replace(chan->rawreadformat, format);
+}
+void ast_channel_set_rawwriteformat(struct ast_channel *chan, struct ast_format *format)
+{
+       ao2_replace(chan->rawwriteformat, format);
+}
+void ast_channel_set_readformat(struct ast_channel *chan, struct ast_format *format)
+{
+       ao2_replace(chan->readformat, format);
+}
+void ast_channel_set_writeformat(struct ast_channel *chan, struct ast_format *format)
+{
+       ao2_replace(chan->writeformat, format);
+}
+struct ast_format *ast_channel_oldwriteformat(struct ast_channel *chan)
+{
+       return chan->oldwriteformat;
+}
+struct ast_format *ast_channel_rawreadformat(struct ast_channel *chan)
+{
+       return chan->rawreadformat;
+}
+struct ast_format *ast_channel_rawwriteformat(struct ast_channel *chan)
+{
+       return chan->rawwriteformat;
+}
+struct ast_format *ast_channel_readformat(struct ast_channel *chan)
+{
+       return chan->readformat;
+}
+struct ast_format *ast_channel_writeformat(struct ast_channel *chan)
+{
+       return chan->writeformat;
+}
+struct ast_hangup_handler_list *ast_channel_hangup_handlers(struct ast_channel *chan)
+{
+       return &chan->hangup_handlers;
+}
+struct ast_datastore_list *ast_channel_datastores(struct ast_channel *chan)
+{
+       return &chan->datastores;
+}
+struct ast_autochan_list *ast_channel_autochans(struct ast_channel *chan)
+{
+       return &chan->autochans;
+}
+struct ast_readq_list *ast_channel_readq(struct ast_channel *chan)
+{
+       return &chan->readq;
+}
+struct ast_frame *ast_channel_dtmff(struct ast_channel *chan)
+{
+       return &chan->dtmff;
+}
+struct ast_jb *ast_channel_jb(struct ast_channel *chan)
+{
+       return &chan->jb;
+}
+struct ast_party_caller *ast_channel_caller(struct ast_channel *chan)
+{
+       return &chan->caller;
+}
+struct ast_party_connected_line *ast_channel_connected(struct ast_channel *chan)
+{
+       return &chan->connected;
+}
+struct ast_party_connected_line *ast_channel_connected_indicated(struct ast_channel *chan)
+{
+       return &chan->connected_indicated;
+}
+struct ast_party_id ast_channel_connected_effective_id(struct ast_channel *chan)
+{
+       return ast_party_id_merge(&chan->connected.id, &chan->connected.priv);
+}
+struct ast_party_dialed *ast_channel_dialed(struct ast_channel *chan)
+{
+       return &chan->dialed;
+}
+struct ast_party_redirecting *ast_channel_redirecting(struct ast_channel *chan)
+{
+       return &chan->redirecting;
+}
+struct ast_party_id ast_channel_redirecting_effective_orig(struct ast_channel *chan)
+{
+       return ast_party_id_merge(&chan->redirecting.orig, &chan->redirecting.priv_orig);
+}
+struct ast_party_id ast_channel_redirecting_effective_from(struct ast_channel *chan)
+{
+       return ast_party_id_merge(&chan->redirecting.from, &chan->redirecting.priv_from);
+}
+struct ast_party_id ast_channel_redirecting_effective_to(struct ast_channel *chan)
+{
+       return ast_party_id_merge(&chan->redirecting.to, &chan->redirecting.priv_to);
+}
+struct timeval *ast_channel_dtmf_tv(struct ast_channel *chan)
+{
+       return &chan->dtmf_tv;
+}
+struct timeval *ast_channel_whentohangup(struct ast_channel *chan)
+{
+       return &chan->whentohangup;
+}
+struct varshead *ast_channel_varshead(struct ast_channel *chan)
+{
+       return &chan->varshead;
+}
+void ast_channel_dtmff_set(struct ast_channel *chan, struct ast_frame *value)
+{
+       chan->dtmff = *value;
+}
+void ast_channel_jb_set(struct ast_channel *chan, struct ast_jb *value)
+{
+       chan->jb = *value;
+}
+void ast_channel_caller_set(struct ast_channel *chan, struct ast_party_caller *value)
+{
+       chan->caller = *value;
+}
+void ast_channel_connected_set(struct ast_channel *chan, struct ast_party_connected_line *value)
+{
+       chan->connected = *value;
+}
+void ast_channel_dialed_set(struct ast_channel *chan, struct ast_party_dialed *value)
+{
+       chan->dialed = *value;
+}
+void ast_channel_redirecting_set(struct ast_channel *chan, struct ast_party_redirecting *value)
+{
+       chan->redirecting = *value;
+}
+void ast_channel_dtmf_tv_set(struct ast_channel *chan, struct timeval *value)
+{
+       chan->dtmf_tv = *value;
+}
+void ast_channel_whentohangup_set(struct ast_channel *chan, struct timeval *value)
+{
+       chan->whentohangup = *value;
+}
+void ast_channel_varshead_set(struct ast_channel *chan, struct varshead *value)
+{
+       chan->varshead = *value;
+}
+struct timeval ast_channel_creationtime(struct ast_channel *chan)
+{
+       return chan->creationtime;
+}
+void ast_channel_creationtime_set(struct ast_channel *chan, struct timeval *value)
+{
+       chan->creationtime = *value;
+}
+
+struct timeval ast_channel_answertime(struct ast_channel *chan)
+{
+       return chan->answertime;
+}
+
+void ast_channel_answertime_set(struct ast_channel *chan, struct timeval *value)
+{
+       chan->answertime = *value;
+}
+
+/* Evil softhangup accessors */
+int ast_channel_softhangup_internal_flag(struct ast_channel *chan)
+{
+       return chan->softhangup;
+}
+void ast_channel_softhangup_internal_flag_set(struct ast_channel *chan, int value)
+{
+       chan->softhangup = value;
+}
+void ast_channel_softhangup_internal_flag_add(struct ast_channel *chan, int value)
+{
+       chan->softhangup |= value;
+}
+void ast_channel_softhangup_internal_flag_clear(struct ast_channel *chan, int value)
+{
+       chan ->softhangup &= ~value;
+}
+
+int ast_channel_unbridged_nolock(struct ast_channel *chan)
+{
+       return chan->unbridged;
+}
+
+int ast_channel_unbridged(struct ast_channel *chan)
+{
+       int res;
+       ast_channel_lock(chan);
+       res = ast_channel_unbridged_nolock(chan);
+       ast_channel_unlock(chan);
+       return res;
+}
+
+void ast_channel_set_unbridged_nolock(struct ast_channel *chan, int value)
+{
+       chan->unbridged = value;
+       ast_queue_frame(chan, &ast_null_frame);
+}
+
+void ast_channel_set_unbridged(struct ast_channel *chan, int value)
+{
+       ast_channel_lock(chan);
+       ast_channel_set_unbridged_nolock(chan, value);
+       ast_channel_unlock(chan);
+}
+
+void ast_channel_callid_cleanup(struct ast_channel *chan)
+{
+       chan->callid = 0;
+}
+
+/* Typedef accessors */
+ast_group_t ast_channel_callgroup(const struct ast_channel *chan)
+{
+       return chan->callgroup;
+}
+void ast_channel_callgroup_set(struct ast_channel *chan, ast_group_t value)
+{
+       chan->callgroup = value;
+}
+ast_group_t ast_channel_pickupgroup(const struct ast_channel *chan)
+{
+       return chan->pickupgroup;
+}
+void ast_channel_pickupgroup_set(struct ast_channel *chan, ast_group_t value)
+{
+       chan->pickupgroup = value;
+}
+struct ast_namedgroups *ast_channel_named_callgroups(const struct ast_channel *chan)
+{
+       return chan->named_callgroups;
+}
+void ast_channel_named_callgroups_set(struct ast_channel *chan, struct ast_namedgroups *value)
+{
+       ast_unref_namedgroups(chan->named_callgroups);
+       chan->named_callgroups = ast_ref_namedgroups(value);
+}
+struct ast_namedgroups *ast_channel_named_pickupgroups(const struct ast_channel *chan)
+{
+       return chan->named_pickupgroups;
+}
+void ast_channel_named_pickupgroups_set(struct ast_channel *chan, struct ast_namedgroups *value)
+{
+       ast_unref_namedgroups(chan->named_pickupgroups);
+       chan->named_pickupgroups = ast_ref_namedgroups(value);
+}
+
+/* Alertpipe functions */
+int ast_channel_alert_write(struct ast_channel *chan)
+{
+       char blah = 0x7F;
+       return ast_channel_alert_writable(chan) && write(chan->alertpipe[1], &blah, sizeof(blah)) != sizeof(blah);
+}
+
+ast_alert_status_t ast_channel_internal_alert_read(struct ast_channel *chan)
+{
+       int flags;
+       char blah;
+
+       if (!ast_channel_internal_alert_readable(chan)) {
+               return AST_ALERT_NOT_READABLE;
+       }
+
+       flags = fcntl(chan->alertpipe[0], F_GETFL);
+       /* For some odd reason, the alertpipe occasionally loses nonblocking status,
+        * which immediately causes a deadlock scenario.  Detect and prevent this. */
+       if ((flags & O_NONBLOCK) == 0) {
+               ast_log(LOG_ERROR, "Alertpipe on channel %s lost O_NONBLOCK?!!\n", ast_channel_name(chan));
+               if (fcntl(chan->alertpipe[0], F_SETFL, flags | O_NONBLOCK) < 0) {
+                       ast_log(LOG_WARNING, "Unable to set alertpipe nonblocking! (%d: %s)\n", errno, strerror(errno));
+                       return AST_ALERT_READ_FATAL;
+               }
+       }
+       if (read(chan->alertpipe[0], &blah, sizeof(blah)) < 0) {
+               if (errno != EINTR && errno != EAGAIN) {
+                       ast_log(LOG_WARNING, "read() failed: %s\n", strerror(errno));
+                       return AST_ALERT_READ_FAIL;
+               }
+       }
+
+       return AST_ALERT_READ_SUCCESS;
+}
+
+int ast_channel_alert_writable(struct ast_channel *chan)
+{
+       return chan->alertpipe[1] > -1;
+}
+
+int ast_channel_internal_alert_readable(struct ast_channel *chan)
+{
+       return chan->alertpipe[0] > -1;
+}
+
+void ast_channel_internal_alertpipe_clear(struct ast_channel *chan)
+{
+       chan->alertpipe[0] = chan->alertpipe[1] = -1;
+}
+
+void ast_channel_internal_alertpipe_close(struct ast_channel *chan)
+{
+       if (ast_channel_internal_alert_readable(chan)) {
+               close(chan->alertpipe[0]);
+       }
+       if (ast_channel_alert_writable(chan)) {
+               close(chan->alertpipe[1]);
+       }
+}
+
+int ast_channel_internal_alertpipe_init(struct ast_channel *chan)
+{
+       if (pipe(chan->alertpipe)) {
+               ast_log(LOG_WARNING, "Channel allocation failed: Can't create alert pipe! Try increasing max file descriptors with ulimit -n\n");
+               return -1;
+       } else {
+               int flags = fcntl(chan->alertpipe[0], F_GETFL);
+               if (fcntl(chan->alertpipe[0], F_SETFL, flags | O_NONBLOCK) < 0) {
+                       ast_log(LOG_WARNING, "Channel allocation failed: Unable to set alertpipe nonblocking! (%d: %s)\n", errno, strerror(errno));
+                       return -1;
+               }
+               flags = fcntl(chan->alertpipe[1], F_GETFL);
+               if (fcntl(chan->alertpipe[1], F_SETFL, flags | O_NONBLOCK) < 0) {
+                       ast_log(LOG_WARNING, "Channel allocation failed: Unable to set alertpipe nonblocking! (%d: %s)\n", errno, strerror(errno));
+                       return -1;
+               }
+       }
+       return 0;
+}
+
+int ast_channel_internal_alert_readfd(struct ast_channel *chan)
+{
+       return chan->alertpipe[0];
+}
+
+void ast_channel_internal_alertpipe_swap(struct ast_channel *chan1, struct ast_channel *chan2)
+{
+       int i;
+       for (i = 0; i < ARRAY_LEN(chan1->alertpipe); i++) {
+               SWAP(chan1->alertpipe[i], chan2->alertpipe[i]);
+       }
+}
+
+/* file descriptor array accessors */
+void ast_channel_internal_fd_set(struct ast_channel *chan, int which, int value)
+{
+       chan->fds[which] = value;
+}
+void ast_channel_internal_fd_clear(struct ast_channel *chan, int which)
+{
+       ast_channel_internal_fd_set(chan, which, -1);
+}
+void ast_channel_internal_fd_clear_all(struct ast_channel *chan)
+{
+       int i;
+       for (i = 0; i < AST_MAX_FDS; i++) {
+               ast_channel_internal_fd_clear(chan, i);
+       }
+}
+int ast_channel_fd(const struct ast_channel *chan, int which)
+{
+       return chan->fds[which];
+}
+int ast_channel_fd_isset(const struct ast_channel *chan, int which)
+{
+       return ast_channel_fd(chan, which) > -1;
+}
+
+#ifdef HAVE_EPOLL
+struct ast_epoll_data *ast_channel_internal_epfd_data(const struct ast_channel *chan, int which)
+{
+       return chan->epfd_data[which];
+}
+void ast_channel_internal_epfd_data_set(struct ast_channel *chan, int which , struct ast_epoll_data *value)
+{
+       chan->epfd_data[which] = value;
+}
+#endif
+
+pthread_t ast_channel_blocker(const struct ast_channel *chan)
+{
+       return chan->blocker;
+}
+void ast_channel_blocker_set(struct ast_channel *chan, pthread_t value)
+{
+       chan->blocker = value;
+}
+
+ast_timing_func_t ast_channel_timingfunc(const struct ast_channel *chan)
+{
+       return chan->timingfunc;
+}
+void ast_channel_timingfunc_set(struct ast_channel *chan, ast_timing_func_t value)
+{
+       chan->timingfunc = value;
+}
+
+struct ast_bridge *ast_channel_internal_bridge(const struct ast_channel *chan)
+{
+       return chan->bridge;
+}
+void ast_channel_internal_bridge_set(struct ast_channel *chan, struct ast_bridge *value)
+{
+       chan->bridge = value;
+       ast_channel_publish_snapshot(chan);
+}
+
+struct ast_bridge_channel *ast_channel_internal_bridge_channel(const struct ast_channel *chan)
+{
+       return chan->bridge_channel;
+}
+void ast_channel_internal_bridge_channel_set(struct ast_channel *chan, struct ast_bridge_channel *value)
+{
+       chan->bridge_channel = value;
+}
+
+struct ast_flags *ast_channel_flags(struct ast_channel *chan)
+{
+       return &chan->flags;
+}
+
+static int collect_names_cb(void *obj, void *arg, int flags) {
+       struct ast_control_pvt_cause_code *cause_code = obj;
+       struct ast_str **str = arg;
+
+       ast_str_append(str, 0, "%s%s", (ast_str_strlen(*str) ? "," : ""), cause_code->chan_name);
+
+       return 0;
+}
+
+struct ast_str *ast_channel_dialed_causes_channels(const struct ast_channel *chan)
+{
+       struct ast_str *chanlist = ast_str_create(128);
+
+       if (!chanlist) {
+               return NULL;
+       }
+
+       ao2_callback(chan->dialed_causes, 0, collect_names_cb, &chanlist);
+
+       return chanlist;
+}
+
+struct ast_control_pvt_cause_code *ast_channel_dialed_causes_find(const struct ast_channel *chan, const char *chan_name)
+{
+       return ao2_find(chan->dialed_causes, chan_name, OBJ_KEY);
+}
+
+int ast_channel_dialed_causes_add(const struct ast_channel *chan, const struct ast_control_pvt_cause_code *cause_code, int datalen)
+{
+       struct ast_control_pvt_cause_code *ao2_cause_code;
+       ao2_find(chan->dialed_causes, cause_code->chan_name, OBJ_KEY | OBJ_UNLINK | OBJ_NODATA);
+       ao2_cause_code = ao2_alloc(datalen, NULL);
+
+       if (ao2_cause_code) {
+               memcpy(ao2_cause_code, cause_code, datalen);
+               ao2_link(chan->dialed_causes, ao2_cause_code);
+               ao2_ref(ao2_cause_code, -1);
+               return 0;
+       } else {
+               return -1;
+       }
+}
+
+void ast_channel_dialed_causes_clear(const struct ast_channel *chan)
+{
+       ao2_callback(chan->dialed_causes, OBJ_UNLINK | OBJ_NODATA | OBJ_MULTIPLE, NULL, NULL);
+}
+
+/* \brief Hash function for pvt cause code frames */
+static int pvt_cause_hash_fn(const void *vpc, const int flags)
+{
+       const struct ast_control_pvt_cause_code *pc = vpc;
+       return ast_str_hash(ast_tech_to_upper(ast_strdupa(pc->chan_name)));
+}
+
+/* \brief Comparison function for pvt cause code frames */
+static int pvt_cause_cmp_fn(void *obj, void *vstr, int flags)
+{
+       struct ast_control_pvt_cause_code *pc = obj;
+       char *str = ast_tech_to_upper(ast_strdupa(vstr));
+       char *pc_str = ast_tech_to_upper(ast_strdupa(pc->chan_name));
+       return !strcmp(pc_str, str) ? CMP_MATCH | CMP_STOP : 0;
+}
+
+#define DIALED_CAUSES_BUCKETS 37
+
+struct ast_channel *__ast_channel_internal_alloc(void (*destructor)(void *obj), const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *file, int line, const char *function)
+{
+       struct ast_channel *tmp;
+#if defined(REF_DEBUG)
+       tmp = __ao2_alloc_debug(sizeof(*tmp), destructor,
+               AO2_ALLOC_OPT_LOCK_MUTEX, "", file, line, function, 1);
+#elif defined(__AST_DEBUG_MALLOC)
+       tmp = __ao2_alloc_debug(sizeof(*tmp), destructor,
+               AO2_ALLOC_OPT_LOCK_MUTEX, "", file, line, function, 0);
+#else
+       tmp = ao2_alloc(sizeof(*tmp), destructor);
+#endif
+
+       if ((ast_string_field_init(tmp, 128))) {
+               return ast_channel_unref(tmp);
+       }
+
+       if (!(tmp->dialed_causes = ao2_container_alloc(DIALED_CAUSES_BUCKETS, pvt_cause_hash_fn, pvt_cause_cmp_fn))) {
+               return ast_channel_unref(tmp);
+       }
+
+       /* set the creation time in the uniqueid */
+       tmp->uniqueid.creation_time = time(NULL);
+       tmp->uniqueid.creation_unique = ast_atomic_fetchadd_int(&uniqueint, 1);
+
+       /* use provided id or default to historical {system-}time.# format */
+       if (assignedids && !ast_strlen_zero(assignedids->uniqueid)) {
+               ast_copy_string(tmp->uniqueid.unique_id, assignedids->uniqueid, sizeof(tmp->uniqueid.unique_id));
+       } else if (ast_strlen_zero(ast_config_AST_SYSTEM_NAME)) {
+               snprintf(tmp->uniqueid.unique_id, sizeof(tmp->uniqueid.unique_id), "%li.%d",
+                       (long)(tmp->uniqueid.creation_time),
+                       tmp->uniqueid.creation_unique);
+       } else {
+               snprintf(tmp->uniqueid.unique_id, sizeof(tmp->uniqueid.unique_id), "%s-%li.%d",
+                       ast_config_AST_SYSTEM_NAME,
+                       (long)(tmp->uniqueid.creation_time),
+                       tmp->uniqueid.creation_unique);
+       }
+
+       /* copy linked id from parent channel if known */
+       if (requestor) {
+               tmp->linkedid = requestor->linkedid;
+       } else {
+               tmp->linkedid = tmp->uniqueid;
+       }
+
+       return tmp;
+}
+
+struct ast_channel *ast_channel_internal_oldest_linkedid(struct ast_channel *a, struct ast_channel *b)
+{
+       ast_assert(a->linkedid.creation_time != 0);
+       ast_assert(b->linkedid.creation_time != 0);
+
+       if (a->linkedid.creation_time < b->linkedid.creation_time) {
+               return a;
+       }
+       if (b->linkedid.creation_time < a->linkedid.creation_time) {
+               return b;
+       }
+       if (a->linkedid.creation_unique < b->linkedid.creation_unique) {
+               return a;
+       }
+       return b;
+}
+
+void ast_channel_internal_copy_linkedid(struct ast_channel *dest, struct ast_channel *source)
+{
+       if (dest->linkedid.creation_time == source->linkedid.creation_time
+               && dest->linkedid.creation_unique == source->linkedid.creation_unique
+               && !strcmp(dest->linkedid.unique_id, source->linkedid.unique_id)) {
+               return;
+       }
+       dest->linkedid = source->linkedid;
+       ast_channel_publish_snapshot(dest);
+}
+
+void ast_channel_internal_swap_uniqueid_and_linkedid(struct ast_channel *a, struct ast_channel *b)
+{
+       struct ast_channel_id temp;
+
+       temp = a->uniqueid;
+       a->uniqueid = b->uniqueid;
+       b->uniqueid = temp;
+
+       temp = a->linkedid;
+       a->linkedid = b->linkedid;
+       b->linkedid = temp;
+}
+
+void ast_channel_internal_swap_topics(struct ast_channel *a, struct ast_channel *b)
+{
+       struct stasis_cp_single *temp;
+
+       temp = a->topics;
+       a->topics = b->topics;
+       b->topics = temp;
+}
+
+void ast_channel_internal_set_fake_ids(struct ast_channel *chan, const char *uniqueid, const char *linkedid)
+{
+       ast_copy_string(chan->uniqueid.unique_id, uniqueid, sizeof(chan->uniqueid.unique_id));
+       ast_copy_string(chan->linkedid.unique_id, linkedid, sizeof(chan->linkedid.unique_id));
+}
+
+void ast_channel_internal_cleanup(struct ast_channel *chan)
+{
+       if (chan->dialed_causes) {
+               ao2_t_ref(chan->dialed_causes, -1,
+                       "done with dialed causes since the channel is going away");
+               chan->dialed_causes = NULL;
+       }
+
+       ast_string_field_free_memory(chan);
+
+       chan->endpoint_forward = stasis_forward_cancel(chan->endpoint_forward);
+       chan->endpoint_cache_forward = stasis_forward_cancel(chan->endpoint_cache_forward);
+
+       stasis_cp_single_unsubscribe(chan->topics);
+       chan->topics = NULL;
+}
+
+void ast_channel_internal_finalize(struct ast_channel *chan)
+{
+       chan->finalized = 1;
+}
+
+int ast_channel_internal_is_finalized(struct ast_channel *chan)
+{
+       return chan->finalized;
+}
+
+struct stasis_topic *ast_channel_topic(struct ast_channel *chan)
+{
+       if (!chan) {
+               return ast_channel_topic_all();
+       }
+
+       return stasis_cp_single_topic(chan->topics);
+}
+
+struct stasis_topic *ast_channel_topic_cached(struct ast_channel *chan)
+{
+       if (!chan) {
+               return ast_channel_topic_all_cached();
+       }
+
+       return stasis_cp_single_topic_cached(chan->topics);
+}
+
+int ast_channel_forward_endpoint(struct ast_channel *chan,
+       struct ast_endpoint *endpoint)
+{
+       ast_assert(chan != NULL);
+       ast_assert(endpoint != NULL);
+
+       chan->endpoint_forward =
+               stasis_forward_all(ast_channel_topic(chan),
+                       ast_endpoint_topic(endpoint));
+       if (!chan->endpoint_forward) {
+               return -1;
+       }
+
+       chan->endpoint_cache_forward = stasis_forward_all(ast_channel_topic_cached(chan),
+               ast_endpoint_topic(endpoint));
+       if (!chan->endpoint_cache_forward) {
+               chan->endpoint_forward = stasis_forward_cancel(chan->endpoint_forward);
+               return -1;
+       }
+
+       return 0;
+}
+
+int ast_channel_internal_setup_topics(struct ast_channel *chan)
+{
+       const char *topic_name = chan->uniqueid.unique_id;
+       ast_assert(chan->topics == NULL);
+
+       if (ast_strlen_zero(topic_name)) {
+               topic_name = "<dummy-channel>";
+       }
+
+       chan->topics = stasis_cp_single_create(
+               ast_channel_cache_all(), topic_name);
+       if (!chan->topics) {
+               return -1;
+       }
+
+       return 0;
 }