/* RFC 3515 */  sip_refer_to_t            *sip_refer_to;      /**< Refer-To (r) */  sip_referred_by_t         *sip_referred_by;   /**< Referred-By (b) */  sip_replaces_t            *sip_replaces;      /**< Replaces */  /* draft-ietf-sip-session-timer */  sip_session_expires_t     *sip_session_expires;				/**< Session-Expires (x) */  sip_min_se_t              *sip_min_se;        /**< Min-SE */  sip_path_t                *sip_path;        /**< Path */  sip_service_route_t       *sip_service_route; /**< Service-Route */  sip_reason_t              *sip_reason;        /**< Reason */  sip_security_client_t     *sip_security_client; /**< Security-Client */  sip_security_server_t     *sip_security_server; /**< Security-Server */  sip_security_verify_t     *sip_security_verify; /**< Security-Verify */  sip_privacy_t             *sip_privacy; /**< Privacy */  sip_etag_t                *sip_etag;          /**< SIP-ETag */  sip_if_match_t            *sip_if_match;      /**< SIP-If-Match */  /* Entity headers */  sip_mime_version_t        *sip_mime_version;	/**< MIME-Version */  sip_content_type_t        *sip_content_type;	/**< Content-Type (c) */  sip_content_encoding_t    *sip_content_encoding; 				/**< Content-Encoding (e) */  sip_content_language_t    *sip_content_language; /**< Content-Language */  sip_content_disposition_t *sip_content_disposition; 				/**< Content-Disposition */  sip_content_length_t      *sip_content_length;/**< Content-Length (l) */  /* === Headers end here */  sip_unknown_t             *sip_unknown;       /**< Unknown headers */  sip_separator_t           *sip_separator;     				/**< Separator between headers and payload */  sip_payload_t             *sip_payload;	/**< Message payload */  msg_multipart_t           *sip_multipart;     /**< Multipart MIME payload */};/** @ingroup sip_request * @brief Structure for @ref sip_request "SIP request line". */struct sip_request_s{  sip_common_t     rq_common[1];   /**< Common fragment info */  sip_error_t     *rq_next;	   /**< Link to next (dummy) */  sip_method_t     rq_method;	   /**< Method enum */  char const      *rq_method_name; /**< Method name */  url_t            rq_url[1];	   /**< RequestURI */  char const      *rq_version;     /**< Protocol version */};/**@ingroup sip_status * @brief Structure for @ref sip_status "SIP status line". */struct sip_status_s{  sip_common_t   st_common[1];	/**< Common fragment info */  sip_error_t   *st_next;	/**< Link to next (dummy) */  char const    *st_version;	/**< Protocol version */  int            st_status;	/**< Status code */  char const    *st_phrase;	/**< Status phrase */};/**@ingroup sip_from * @brief Structure for @From and @To headers. */struct sip_addr_s{  sip_common_t       a_common[1];   /**< Common fragment info */  sip_error_t       *a_next;  char const        *a_display;	    /**< Display name */  url_t              a_url[1];	    /**< URL */  msg_param_t const *a_params;	    /**< Parameter table  */  char const        *a_comment;	    /**< Comment */   char const        *a_tag;	    /**< Tag parameter */};#define a_user a_url->url_user#define a_host a_url->url_host/**@ingroup sip_accept * @brief Structure for @Accept header field. */struct sip_accept_s{  sip_common_t        ac_common[1]; /**< Common fragment info */  sip_accept_t       *ac_next;	    /**< Pointer to next @Accept value */  char const         *ac_type;	    /**< Pointer to type/subtype */  char const         *ac_subtype;   /**< Points after first slash in type */  msg_param_t const  *ac_params;    /**< List of parameters */  char const         *ac_q;	    /**< Value of q parameter */};/**@ingroup sip_allow * @brief Structure for @Allow header field. * * @NEW_1_12_5 (before used struct msg_list_s with @Allow). */struct sip_allow_s{  msg_common_t       k_common[1];   /**< Common fragment info */  msg_list_t        *k_next;	    /**< Link to next */  msg_param_t       *k_items;	    /**< List of allowed items */  uint32_t           k_bitmap;	    /**< Bitmap of allowed methods. 				       @NEW_1_12_5 */};/**@ingroup sip_authentication_info * @brief Structure for @AuthenticationInfo header. * * @deprecated Use struct msg_auth_info_s instead. */struct sip_authentication_info_s{  sip_common_t        ai_common[1]; /**< Common fragment info */  sip_error_t        *ai_next;	    /**< Dummy link to next */  msg_param_t const  *ai_params;    /**< List of authentication info */};/**@ingroup sip_call_id  * @brief Structure for @CallID (and @InReplyTo) header fields. */struct sip_call_id_s {		  sip_common_t   i_common[1];	    /**< Common fragment info */  sip_call_id_t *i_next;	    /**< Link to next (In-Reply-To) */  char const    *i_id;		    /**< ID value */  uint32_t       i_hash;	    /**< Hash value (always nonzero) */};/**@ingroup sip_call_info * @brief Structure for @CallInfo header. */struct sip_call_info_s{  sip_common_t        ci_common[1]; /**< Common fragment info */  sip_call_info_t    *ci_next;	    /**< Link to next @CallInfo */  url_t               ci_url[1];    /**< URI to call info  */  msg_param_t const  *ci_params;    /**< List of parameters */  char const         *ci_purpose;   /**< Value of @b purpose parameter */};/**@ingroup sip_cseq * @brief Structure for @CSeq header. */struct sip_cseq_s{  sip_common_t   cs_common[1];	    /**< Common fragment info */  sip_error_t   *cs_next;	    /**< Link to next (dummy) */  uint32_t       cs_seq;	    /**< Sequence number */  sip_method_t   cs_method;	    /**< Method enum */  char const    *cs_method_name;    /**< Method name */};/**@ingroup sip_contact * @brief Structure for @Contact header field. */struct sip_contact_s{  sip_common_t        m_common[1];  /**< Common fragment info */  sip_contact_t      *m_next;	    /**< Link to next @Contact header */  char const         *m_display;    /**< Display name */  url_t               m_url[1];	    /**< SIP URL */  msg_param_t const  *m_params;	    /**< List of contact-params */  char const         *m_comment;    /**< Comment */  char const         *m_q;	    /**< @Priority */  char const         *m_expires;    /**< Expiration time */};/**@ingroup sip_content_length * @brief Structure for @ContentLength header. */struct sip_content_length_s{  sip_common_t   l_common[1];	    /**< Common fragment info */  sip_error_t   *l_next;	    /**< Link to next (dummy) */  uint32_t       l_length;	    /**< Length in bytes */};#if DOCUMENTATION_ONLY/**@ingroup sip_content_type * * @brief Structure for @ContentType header. */struct sip_content_type_s{  sip_common_t        c_common[1];  /**< Common fragment info */  sip_error_t        *c_next;	    /**< Dummy link to next */  char const         *c_type;	    /**< Pointer to type/subtype */  char const         *c_subtype;    /**< Points after first slash in type */  msg_param_t const  *c_params;	    /**< List of parameters */};#endif/**@ingroup sip_date * @brief Structure for @Date header. */struct sip_date_s{  sip_common_t   d_common[1];	    /**< Common fragment info */  sip_date_t    *d_next;	    /**< Link to next (dummy) */  sip_time_t     d_time;	    /**< Seconds since Jan 1, 1900 */};/**@ingroup sip_error_info * @brief Structure for @ErrorInfo header. */struct sip_error_info_s{  sip_common_t        ei_common[1]; /**< Common fragment info */  sip_call_info_t    *ei_next;	    /**< Link to next @ErrorInfo */  url_t               ei_url[1];    /**< URI to error description */  msg_param_t const  *ei_params;    /**< List of parameters */};/**@ingroup sip_event * @brief Structure for @Event header. */struct sip_event_s {  sip_common_t        o_common[1];  /**< Common fragment info */  sip_error_t        *o_next;	    /**< Link to next (dummy) */  char const *        o_type;	    /**< @Event type */  msg_param_t const  *o_params;	    /**< List of parameters */  char const         *o_id;	    /**< @Event ID */};/**@ingroup sip_expires * @brief Structure for @Expires header. */struct sip_expires_s{  sip_common_t        ex_common[1]; /**< Common fragment info */  sip_error_t        *ex_next;	    /**< Link to next (dummy) */  sip_time_t          ex_date;	    /**< Seconds since Jan 1, 1900 */# define ex_time ex_date  sip_time_t          ex_delta;	    /**< Delta seconds */};/**@ingroup sip_max_forwards * @brief Structure for @MaxForwards header. */struct sip_max_forwards_s{  sip_common_t        mf_common[1]; /**< Common fragment info */  sip_error_t        *mf_next;	    /**< Link to next (dummy) */  unsigned long       mf_count;	    /**< Forwarding count */};/**@ingroup sip_min_expires * @brief Structure for @MinExpires header. */struct sip_min_expires_s{  sip_common_t        me_common[1]; /**< Common fragment info */  sip_error_t        *me_next;	    /**< Link to next (dummy) */  unsigned long       me_delta;	    /**< Seconds */};/**@ingroup sip_rack * @brief Structure for @b Rack header. */struct sip_rack_s{  sip_common_t        ra_common;        /**< Common fragment info */  sip_error_t        *ra_next;		/**< Dummy link to next */  uint32_t            ra_response;	/**< Sequence number of response */  uint32_t            ra_cseq;		/**< Sequence number of request  */  sip_method_t        ra_method;	/**< Original request method */  char const         *ra_method_name;	/**< Original request method name */};/**@ingroup sip_refer_to * @brief Structure for @ReferTo header. */struct sip_refer_to_s{  sip_common_t        r_common[1];  /**< Common fragment info */  sip_error_t        *r_next;	    /**< Link to next (dummy) */  char const         *r_display;  url_t               r_url[1];	    /**< URI to reference */  msg_param_t const  *r_params;	    /**< List of parameters */};/**@ingroup sip_referred_by * @brief Structure for @ReferredBy header. */struct sip_referred_by_s{  sip_common_t        b_common[1];  /**< Common fragment info */  sip_error_t        *b_next;	    /**< Link to next (dummy) */  char const         *b_display;  url_t               b_url[1];	    /**< Referrer-URI */  msg_param_t const  *b_params;	    /**< List of parameters */  char const         *b_cid;	    /**< The cid parameter */};/**@ingroup sip_replaces