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  • /*
     * Asterisk -- An open source telephony toolkit.
     *
     * Copyright (C) 2012, Digium, Inc.
     *
     * Mark Spencer <markster@digium.com>
     *
     * 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 Channel Accessor API
     *
     * This file is intended to be the only file that ever accesses the
     * internals of an ast_channel. All other files should use the
     * accessor functions defined here.
     *
     * \author Terry Wilson
     */
    
    #include "asterisk.h"
    
    ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
    
    #include "asterisk/channel.h"
    #include "asterisk/stringfields.h"
    #include "asterisk/data.h"
    #include "asterisk/indications.h"
    
    /* AST_DATA definitions, which will probably have to be re-thought since the channel will be opaque */
    
    #if 0	/* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
    #define DATA_EXPORT_CALLERID(MEMBER)				\
    	MEMBER(ast_callerid, cid_dnid, AST_DATA_STRING)		\
    	MEMBER(ast_callerid, cid_num, AST_DATA_STRING)		\
    	MEMBER(ast_callerid, cid_name, AST_DATA_STRING)		\
    	MEMBER(ast_callerid, cid_ani, AST_DATA_STRING)		\
    	MEMBER(ast_callerid, cid_pres, AST_DATA_INTEGER)	\
    	MEMBER(ast_callerid, cid_ani2, AST_DATA_INTEGER)	\
    	MEMBER(ast_callerid, cid_tag, AST_DATA_STRING)
    
    AST_DATA_STRUCTURE(ast_callerid, DATA_EXPORT_CALLERID);
    #endif
    
    #define DATA_EXPORT_CHANNEL(MEMBER)						\
    	MEMBER(ast_channel, blockproc, AST_DATA_STRING)				\
    	MEMBER(ast_channel, appl, AST_DATA_STRING)				\
    	MEMBER(ast_channel, 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, rings, AST_DATA_INTEGER)				\
    	MEMBER(ast_channel, priority, AST_DATA_INTEGER)				\
    	MEMBER(ast_channel, macropriority, AST_DATA_INTEGER)			\
    	MEMBER(ast_channel, adsicpe, AST_DATA_INTEGER)				\
    	MEMBER(ast_channel, fin, AST_DATA_UNSIGNED_INTEGER)			\
    	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, 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));
    }
    
    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;
    	struct ast_data *data_zones;
    	struct ast_data *enum_node;
    	struct ast_data *data_softhangup;
    #if 0	/* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
    	struct ast_data *data_callerid;
    	char value_str[100];
    #endif
    
    	if (!tree) {
    		return -1;
    	}
    
    	ast_data_add_structure(ast_channel, tree, chan);
    
    	if (add_bridged) {
    		bc = ast_bridged_channel(chan);
    		if (bc) {
    			data_bridged = ast_data_add_node(tree, "bridged");
    			if (!data_bridged) {
    				return -1;
    			}
    			ast_channel_data_add_structure(data_bridged, bc, 0);
    		}
    	}
    
    	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);
    
    	/* 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);
    
    	/* 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);
    
    	/* 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);
    
    	/* 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);
    
    	/* _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);
    
    	/* channel flags */
    	data_flags = ast_data_add_node(tree, "flags");
    	if (!data_flags) {
    		return -1;
    	}
    	channel_data_add_flags(data_flags, chan);
    
    	ast_data_add_uint(tree, "timetohangup", chan->whentohangup.tv_sec);
    
    #if 0	/* XXX AstData: ast_callerid no longer exists. (Equivalent code not readily apparent.) */
    	/* callerid */
    	data_callerid = ast_data_add_node(tree, "callerid");
    	if (!data_callerid) {
    		return -1;
    	}
    	ast_data_add_structure(ast_callerid, data_callerid, &(chan->cid));
    	/* insert the callerid ton */
    	enum_node = ast_data_add_node(data_callerid, "cid_ton");
    	if (!enum_node) {
    		return -1;
    	}
    	ast_data_add_int(enum_node, "value", chan->cid.cid_ton);
    	snprintf(value_str, sizeof(value_str), "TON: %s/Plan: %s",
    		party_number_ton2str(chan->cid.cid_ton),
    		party_number_plan2str(chan->cid.cid_ton));
    	ast_data_add_str(enum_node, "text", value_str);
    #endif
    
    	/* tone zone */
    	if (chan->zone) {
    		data_zones = ast_data_add_node(tree, "zone");
    		if (!data_zones) {
    			return -1;
    		}
    		ast_tone_zone_data_add_structure(data_zones, chan->zone);
    	}
    
    	/* insert cdr */
    	data_cdr = ast_data_add_node(tree, "cdr");
    	if (!data_cdr) {
    		return -1;
    	}
    
    	ast_cdr_data_add_structure(data_cdr, chan->cdr, 1);
    
    	return 0;
    }
    
    int ast_channel_data_cmp_structure(const struct ast_data_search *tree,
    	struct ast_channel *chan, const char *structure_name)
    {
    	return ast_data_search_cmp_structure(tree, ast_channel, chan, structure_name);
    }
    
    /* ACCESSORS */
    
    
    #define DEFINE_STRINGFIELD_SETTERS_FOR(field) \
    void ast_channel_##field##_set(struct ast_channel *chan, const char *value) \
    { \
    	ast_string_field_set(chan, __do_not_use_##field, value); \
    } \
      \
    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); \
    } \
    void ast_channel_##field##_build(struct ast_channel *chan, const char *fmt, ...) \
    { \
    	va_list ap; \
    	va_start(ap, fmt); \
    	ast_channel_##field##_build_va(chan, fmt, ap); \
    	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 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)