apache 2.2 & 2.4 conn_rec 不同点

apache 2.2 

/** 
 * @brief Structure to store things which are per connection 
 */
struct conn_rec {
    /** Pool associated with this connection */
    apr_pool_t *pool;
    /** Physical vhost this conn came in on */
    server_rec *base_server;
    /** used by http_vhost.c */
    void *vhost_lookup_data;


    /* Information about the connection itself */
    /** local address */
    apr_sockaddr_t *local_addr;
    /** remote address */
    apr_sockaddr_t *remote_addr;


    /** Client's IP address */
    char *remote_ip;
    /** Client's DNS name, if known.  NULL if DNS hasn't been checked,
     *  "" if it has and no address was found.  N.B. Only access this though
     * get_remote_host() */
    char *remote_host;
    /** Only ever set if doing rfc1413 lookups.  N.B. Only access this through
     *  get_remote_logname() */
    char *remote_logname;


    /** Are we still talking? */
    unsigned aborted:1;


    /** Are we going to keep the connection alive for another request?
     * @see ap_conn_keepalive_e */
    ap_conn_keepalive_e keepalive;


    /** have we done double-reverse DNS? -1 yes/failure, 0 not yet, 
     *  1 yes/success */
    signed int double_reverse:2;


    /** How many times have we used it? */
    int keepalives;
    /** server IP address */
    char *local_ip;
    /** used for ap_get_server_name when UseCanonicalName is set to DNS
     *  (ignores setting of HostnameLookups) */
    char *local_host;


    /** ID of this connection; unique at any point in time */
    long id; 
    /** Config vector containing pointers to connections per-server
     *  config structures. */
    struct ap_conf_vector_t *conn_config;
    /** Notes on *this* connection: send note from one module to
     *  another. must remain valid for all requests on this conn */
    apr_table_t *notes;
    /** A list of input filters to be used for this connection */
    struct ap_filter_t *input_filters;
    /** A list of output filters to be used for this connection */
    struct ap_filter_t *output_filters;
    /** handle to scoreboard information for this connection */
    void *sbh;
    /** The bucket allocator to use for all bucket/brigade creations */
    struct apr_bucket_alloc_t *bucket_alloc;
    /** The current state of this connection */
    conn_state_t *cs;
    /** Is there data pending in the input filters? */ 
    int data_in_input_filters;
    
    /** Are there any filters that clogg/buffer the input stream, breaking
     *  the event mpm.
     */
    int clogging_input_filters;
};

apache 2.4

/**
 * @brief Structure to store things which are per connection
 */
struct conn_rec {
    /** Pool associated with this connection */
    apr_pool_t *pool;
    /** Physical vhost this conn came in on */
    server_rec *base_server;
    /** used by http_vhost.c */
    void *vhost_lookup_data;


    /* Information about the connection itself */
    /** local address */
    apr_sockaddr_t *local_addr;
    /** remote address; this is the end-point of the next hop, for the address
     *  of the request creator, see useragent_addr in request_rec
     */
    apr_sockaddr_t *client_addr;


    /** Client's IP address; this is the end-point of the next hop, for the
     *  IP of the request creator, see useragent_ip in request_rec
     */
    char *client_ip;
    /** Client's DNS name, if known.  NULL if DNS hasn't been checked,
     *  "" if it has and no address was found.  N.B. Only access this though
     * get_remote_host() */
    char *remote_host;
    /** Only ever set if doing rfc1413 lookups.  N.B. Only access this through
     *  get_remote_logname() */
    char *remote_logname;


    /** server IP address */
    char *local_ip;
    /** used for ap_get_server_name when UseCanonicalName is set to DNS
     *  (ignores setting of HostnameLookups) */
    char *local_host;


    /** ID of this connection; unique at any point in time */
    long id;
    /** Config vector containing pointers to connections per-server
     *  config structures. */
    struct ap_conf_vector_t *conn_config;
    /** Notes on *this* connection: send note from one module to
     *  another. must remain valid for all requests on this conn */
    apr_table_t *notes;
    /** A list of input filters to be used for this connection */
    struct ap_filter_t *input_filters;
    /** A list of output filters to be used for this connection */
    struct ap_filter_t *output_filters;
    /** handle to scoreboard information for this connection */
    void *sbh;
    /** The bucket allocator to use for all bucket/brigade creations */
    struct apr_bucket_alloc_t *bucket_alloc;
    /** The current state of this connection; may be NULL if not used by MPM */
    conn_state_t *cs;
    /** Is there data pending in the input filters? */
    int data_in_input_filters;
    /** Is there data pending in the output filters? */
    int data_in_output_filters;


    /** Are there any filters that clogg/buffer the input stream, breaking
     *  the event mpm.
     */
    unsigned int clogging_input_filters:1;


    /** have we done double-reverse DNS? -1 yes/failure, 0 not yet,
     *  1 yes/success */
    signed int double_reverse:2;


    /** Are we still talking? */
    unsigned aborted;


    /** Are we going to keep the connection alive for another request?
     * @see ap_conn_keepalive_e */
    ap_conn_keepalive_e keepalive;


    /** How many times have we used it? */
    int keepalives;


    /** Optional connection log level configuration. May point to a server or
     *  per_dir config, i.e. must be copied before modifying */
    const struct ap_logconf *log;


    /** Id to identify this connection in error log. Set when the first
     *  error log entry for this connection is generated.
     */
    const char *log_id;




    /** This points to the current thread being used to process this request,
     * over the lifetime of a request, the value may change. Users of the connection
     * record should not rely upon it staying the same between calls that invole
     * the MPM.
     */
#if APR_HAS_THREADS
    apr_thread_t *current_thread;
#endif
};