tcptxthandler.h

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/*
** Copyright (C) 2004 Russell Leighton
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/




#ifndef __AWHANDLER_TCPTXT__
#define __AWHANDLER_TCPTXT__

#include <regex.h>

#include "sysnet.h" 
#include "monitor.h"
#include "wire.h"

typedef struct {

  aw_event_sig_t
   connect,                  /* could connect */
   noconnect,                /* could NOT connect */
   service,                  /* regex matched */
   noservice,                /* regex did NOT match */
   triptime;                 /* time to connect+handshake */


  u_int32_t
   statefull;            /* if non-zero then connect/noconnect, service/noservice events will be statefull,
                            meaning you only get events on transitions from connect <-> noconnect, service <-> noservice
                          */


} aw_tcptxthandler_events_t;

typedef enum {

  AW_TCPTXTHANDLER_IDLE,               /* not doing anything */
  AW_TCPTXTHANDLER_WAIT_CONNECT,       /* waiting on a connect() */
  AW_TCPTXTHANDLER_WAIT_WRITE,         /* waiting on a write() */
  AW_TCPTXTHANDLER_WAIT_READ,          /* waiting on a read() */
  AW_TCPTXTHANDLER_DONE                /* done */

} aw_tcptxthandler_state_cd_t;

/* should be bigger than the MTU you expect...usually, at least 1500 */
#define AW_TCPTXTHANDLER_READ_BUFFER_SIZE 4096

typedef struct {

  aw_tcptxthandler_state_cd_t
   state_cd;

  int32_t
   sfd;

  aw_event_t
   *current_event;

  /* marks start of connection */
  aw_timestamp_t
   starttime;

  /* bytes read or written (depending on state_cd) */
  u_int32_t
   nbytes;

  /* -1 on start and the value of Content-Length: (if present in header) plus header size */
  int32_t
   data_left;

  byte_t
   read_buffer[AW_TCPTXTHANDLER_READ_BUFFER_SIZE];

  /* 1 if last handler could connect, -1 if noconnect */
  int32_t
   connect;

  /* 1 if last handler could check service, -1 if noservice */
  int32_t
   service;

} aw_tcptxthandler_state_t;

typedef struct {

  aw_handler_t 
    handler_header;

  aw_tcptxthandler_state_t
   state;

  aw_tcptxthandler_events_t
   events;

  struct sockaddr_in
    service_addr;

  /* used for timeout callbacks */
  aw_address_t
   timeout_event_id;

  /* sched for timeout alarm */
  aw_alarm_sched_t
   timeout_sched;

  byte_t
    *url,                      /* full URL */
    *protocol,                 /* parsed from URL */
    *hostname,                 /* parsed from URL */
    *path,                     /* parsed from URL */
    *cmd;                      /* request */

  /* holds compiled regular expression  */
  regex_t
   pattern;

  /* called for every event to allow altering of cmd (optional) */
  void (*process_event)(aw_handler_args_t *args, aw_event_t *event);

} aw_tcptxthandler_t ;


aw_tcptxthandler_t *aw_create_tcptxthandler(const aw_tcptxthandler_events_t *events,
                                            const byte_t *url,
                                            const u_int32_t default_port,
                                            const byte_t *cmd,
                                            const byte_t *regexp,
                                            const aw_timestamp_t timeout,
                                            int32_t (*regevent)(aw_handler_t *h, aw_address_t *eventid, u_int32_t index),
                                            int32_t (*regmaskevent)(aw_handler_t *h, aw_address_t *eventid, u_int32_t index),
                                            const aw_alarm_sched_t *sched,
                                            aw_logger_t *logger
                                            );

int32_t aw_init_tcptxthandler(aw_tcptxthandler_t *h,
                              const aw_tcptxthandler_events_t *events,
                              const byte_t *url,
                              const u_int32_t default_port,
                              const byte_t *cmd,
                              const byte_t *regexp,
                              const aw_timestamp_t timeout,
                              int32_t (*regevent)(aw_handler_t *h, aw_address_t *eventid, u_int32_t index),
                              int32_t (*regmaskevent)(aw_handler_t *h, aw_address_t *eventid, u_int32_t index),
                              const aw_alarm_sched_t *sched,
                              aw_logger_t *logger
                              );


void aw_free_tcptxthandler(aw_tcptxthandler_t *p);


aw_handler_t *aw_wire_tcptxthandler(aw_wire_mkhandler_args_t *args);

aw_handler_t *aw_wire_tcptxthandler_wrapper(const u_int32_t default_port, const byte_t *cmd, 
                                            const byte_t *regexp,
                                            aw_wire_mkhandler_args_t *args);


#endif

Aware 0.11.1 Copyright (C) 1998-2005 Russell Leighton (russ@elegant-software.com)