stratcon_jlog_streamer.h

/*
 * Copyright (c) 2007, OmniTI Computer Consulting, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * Neither the name OmniTI Computer Consulting, Inc. nor the names
 *       of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written
 *       permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _STRATCON_LOG_STREAMER_H
#define _STRATCON_LOG_STREAMER_H

#include "noit_conf.h"
#include "utils/noit_atomic.h"
#include "jlog/jlog.h"
#include <netinet/in.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include "stratcon_datastore.h"

#define DEFAULT_NOIT_CONNECTION_TIMEOUT 60000 /* 60 seconds */

typedef struct noit_connection_ctx_t {
  noit_atomic32_t refcnt;
  union {
    struct sockaddr remote;
    struct sockaddr_un remote_un;
    struct sockaddr_in remote_in;
    struct sockaddr_in6 remote_in6;
  } r;
  socklen_t remote_len;
  char *remote_str;
  char *remote_cn;
  u_int32_t current_backoff;
  int wants_shutdown;
  int wants_permanent_shutdown;
  int max_silence;
  noit_hash_table *config;
  noit_hash_table *sslconfig;
  struct timeval last_connect;
  eventer_t timeout_event;
  eventer_t retry_event;
  eventer_t e;

  eventer_func_t consumer_callback;
  void (*consumer_free)(void *);
  void *consumer_ctx;
} noit_connection_ctx_t;

typedef struct jlog_streamer_ctx_t {
  u_int32_t jlog_feed_cmd;
  int bytes_expected;
  int bytes_read;
  char *buffer;         /* These guys are for doing partial reads */

  enum {
    JLOG_STREAMER_WANT_INITIATE = 0,
    JLOG_STREAMER_WANT_COUNT = 1,
    JLOG_STREAMER_WANT_HEADER = 2,
    JLOG_STREAMER_WANT_BODY = 3,
    JLOG_STREAMER_IS_ASYNC = 4,
    JLOG_STREAMER_WANT_CHKPT = 5,
    JLOG_STREAMER_WANT_ERROR = 6,
  } state;
  int count;            /* Number of jlog messages we need to read */
  int needs_chkpt;
  struct {
    jlog_id   chkpt;
    u_int32_t tv_sec;
    u_int32_t tv_usec;
    u_int32_t message_len;
  } header;

  u_int64_t total_events;
  u_int64_t total_bytes_read;

  void (*push)(stratcon_datastore_op_t, struct sockaddr *, const char *, void *, eventer_t);
} jlog_streamer_ctx_t;

API_EXPORT(void)
  stratcon_jlog_streamer_init(const char *toplevel);
API_EXPORT(void)
  stratcon_jlog_streamer_reload(const char *toplevel);
API_EXPORT(int)
  stratcon_jlog_recv_handler(eventer_t e, int mask, void *closure,
                             struct timeval *now);
API_EXPORT(jlog_streamer_ctx_t *)
  stratcon_jlog_streamer_ctx_alloc(void);
API_EXPORT(void)
  jlog_streamer_ctx_free(void *cl);
API_EXPORT(int)
  noit_connection_update_timeout(noit_connection_ctx_t *ctx);
API_EXPORT(int)
  noit_connection_disable_timeout(noit_connection_ctx_t *ctx);
API_EXPORT(void)
  noit_connection_ctx_dealloc(noit_connection_ctx_t *ctx);
API_EXPORT(void)
  stratcon_streamer_connection(const char *toplevel, const char *destination,
                               eventer_func_t handler,
                               void *(*handler_alloc)(void), void *handler_ctx,
                               void (*handler_free)(void *));

/*! \fn int stratcon_find_noit_ip_by_cn(const char *cn, char *ip, int len)
    \brief find the remote IPv4 address for the cn if it is configured
    \param cn the remote CN in which you are interested
    \param ip the buffer where the IP will be stored if it is found
    \param len the length of the passed buffer
    \return 0 on success, -1 if the CN is not in the cache, > 0 represents the size needed if the supplied buffer is too short.
 */

API_EXPORT(int)
  stratcon_find_noit_ip_by_cn(const char *cn, char *ip, int len);


#endif