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osip结构体

/**
 * Structure for SIP Message (REQUEST and RESPONSE).
 * @struct osip_message
 */
  struct osip_message
  {
    char *sip_version;                /**< SIP version (SIP request only) */
    osip_uri_t *req_uri;              /**< Request-Uri (SIP request only) */
    char *sip_method;                 /**< METHOD (SIP request only) */

    int status_code;                  /**< Status Code (SIP answer only) */
    char *reason_phrase;              /**< Reason Phrase (SIP answer only) */

#ifndef MINISIZE
    osip_list_t accepts;             /**< Accept headers */
    osip_list_t accept_encodings;    /**< Accept-Encoding headers */
    osip_list_t accept_languages;    /**< Accept-Language headers */
    osip_list_t alert_infos;         /**< Alert-Info headers */
    osip_list_t allows;              /**< Allows headers */
    osip_list_t authentication_infos;/**< authentication_info headers */
#endif
    osip_list_t authorizations;      /**< Authorizations headers */
    osip_call_id_t *call_id;          /**< Call-ID header */
#ifndef MINISIZE
    osip_list_t call_infos;          /**< Call-Infos header */
#endif
    osip_list_t contacts;            /**< Contacts headers */
#ifndef MINISIZE
    osip_list_t content_encodings;   /**< Content-Encodings headers */
#endif
    osip_content_length_t *content_length;   /**< Content-Length header */
    osip_content_type_t *content_type;       /**< Content-Type header */
    osip_cseq_t *cseq;                /**< CSeq header */
#ifndef MINISIZE
    osip_list_t error_infos;         /**< Error-Info headers */
#endif
    osip_from_t *from;                /**< From header */
    osip_mime_version_t *mime_version;/**< Mime-Version header */
    osip_list_t proxy_authenticates; /**< Proxy-Authenticate headers */
#ifndef MINISIZE
    osip_list_t proxy_authentication_infos; /**< P-Authentication-Info headers */
#endif
    osip_list_t proxy_authorizations;/**< Proxy-authorization headers */
    osip_list_t record_routes;       /**< Record-Route headers */
    osip_list_t routes;              /**< Route headers */
    osip_to_t *to;                    /**< To header */
    osip_list_t vias;                /**< Vias headers */
    osip_list_t www_authenticates;   /**< WWW-Authenticate headers */

    osip_list_t headers;             /**< Other headers */

    osip_list_t bodies;              /**< List of attachements */

    /*
       1: structure and buffer "message" are identical.
       2: buffer "message" is not up to date with the structure info (call osip_message_to_str to update it).
     */
    int message_property;             /**@internal */
    char *message;                    /**@internal */
    size_t message_length;            /**@internal */

    void *application_data;           /**can be used by upper layer*/
  };

  

  typedef struct osip_list osip_list_t;

    struct osip_list

    {

    int nb_elt;

    __node_t *node;

  }

  typedef struct __node  __node_t;

  struct __node

  {

    void *next;      /*next __node_t containing element */

    void *element;  /*element in current node*/

  }

  int

  osip_message_parse (osip_message_t * sip, const char *buf, size_t length)

  {

    return _osip_message_parse(sip, buf, length, 0);

  }

  static int

  _osip_message_parse (osip_message_t *sip, const char *buf, size_t length,

              int sipfrag)

  {

    int i;

    const char *next_header_index;

    char *tmp;

    char *beg;

    

    tmp = osip_malloc (length + 2);

    if (tmp == NULL)

    {
      OSIP_TRACE (osip_trace

              (__FILE__, __LINE__, OSIP_ERROR, NULL, 

              "Could not allocate memory. \n"));

      return -1;

    }

    beg = tmp;

    memcpy (tmp, buf, length);

    tmp[length] = ‘\0‘;

    osip_util_replace_all_lws (tmp);

    //parse request or status line

    i = __osip_message_startline_parse (sip, tmp, &next_header_inde);

    if (i == -1 && !sipfrag)

    {

      osip_fee(beg);

      return -1;

    }    

    tmp = (char*) next_header_index;

    //parse headers

    i = msg_headers_parse (sip, tmp, &next_header_index);

    if (i == -1)

    {

      OSIP_TRACE (osip_trace

              (__FILE__, __LINE__, OSIP_ERROR, NULL,

              "error in msg_header_parse()\n"));

      osip_free (beg);

      return -1;

    }

    tmp = (char *) next_header_index;

 

    if (tmp[0] == ‘\0‘ || tmp[1] == ‘\0‘ || tmp[2] == ‘\0‘}

    {

      if (sip->content_length == NULL)

        osip_message_set_content_length (sip, "0");

      osip_free (beg);

      return 0;

    }

    i = msg_osip_body_parse (sip, tmp, &next_header_index, length - (tmp - beg));

    osip_free (beg);

    if (i == -1)

    {

      OSIP_TRACE (osip_trace

            (__FILE__, __LINE__, OSIP_ERROR, NULL,

            "error in msg_osip_body_parse()\n"));

      return -1;

    }

    /* this is mandatory in the osip stack */

    if (sip->content_length == NULL)

      osip_message_set_content_length (sip, "0");

    return 0;

}

 

  

osip结构体