HttpConn.h

/*
Copyright (C) <2010-2011> Karl Hiramoto <karl@hiramoto.org>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#ifndef HTTP_CONN_H
#define HTTP_CONN_H 1

#include <stdbool.h>
#include <time.h>
#include <ubiqx/ubi_dLinkList.h>
#include <linux/netfilter/nf_conntrack_tcp.h>

#include "HttpReq.h"

/**
* @defgroup HttpConn  HTTP connection
* @{
*/

struct ContentFilter;

typedef ubi_dlList ipv4_tcp_pkt_list_t;

struct HttpConn {
	ubi_dlNode node;	/** ubiqx "internal" data */
	uint32_t id;
	struct Ipv4TcpTuple tuple;
	uint32_t server_seq_num;  // note sure if this needed
	uint32_t server_ack_num;
	uint32_t client_seq_num;
	uint32_t client_ack_num;
	bool server_data_altered;
	bool not_http; /// true if we detect connection that does not comply with HTTP
	uint32_t packet_count;
	uint32_t request_count;  /// how many requests have been sent
	time_t last_pkt; ///time last packet received, used to remove stale connections
	unsigned cur_request;
	unsigned cur_response;
	enum tcp_conntrack client_state;
	enum tcp_conntrack server_state;
	/// Contains pointer with reference to content filter and its rules
	struct WfConfig *config;

	struct PrivData *priv_data;

	/** linked list of HttpReq.  HTTP 1.1 persistent connections have multiple reqs per con.
	After request has been received by client we may remove from list.
	*/
	HttpReq_list_t *request_list;

	/** Linked list of packets from server, only used with out of order packets */
	ipv4_tcp_pkt_list_t *server_buffer;
	ipv4_tcp_pkt_list_t *client_buffer;

};


struct HttpConn* HttpConn_new(struct WfConfig *config);
void HttpConn_del(struct HttpConn **con);
int HttpConn_processsPkt(struct HttpConn* con, struct Ipv4TcpPkt *pkt);


typedef ubi_dlList HttpConn_list_t;


/** @}  */
#endif