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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2017 by Delphix. All rights reserved.
*/
#ifndef _INET_TCP_STACK_H
#define _INET_TCP_STACK_H
#include <sys/netstack.h>
#include <inet/ip.h>
#include <inet/ipdrop.h>
#include <inet/tcp_stats.h>
#include <sys/sunddi.h>
#include <sys/sunldi.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
/*
* TCP stack instances
*/
struct tcp_stack {
netstack_t *tcps_netstack; /* Common netstack */
/*
* Extra privileged ports. In host byte order.
* Protected by tcp_epriv_port_lock.
*/
#define TCP_NUM_EPRIV_PORTS 64
int tcps_g_num_epriv_ports;
in_port_t tcps_g_epriv_ports[TCP_NUM_EPRIV_PORTS];
kmutex_t tcps_epriv_port_lock;
/*
* The smallest anonymous port in the priviledged port range which TCP
* looks for free port. Use in the option TCP_ANONPRIVBIND.
*/
in_port_t tcps_min_anonpriv_port;
/* holds the tcp tunables */
struct mod_prop_info_s *tcps_propinfo_tbl;
/* Hint not protected by any lock */
uint_t tcps_next_port_to_try;
/* TCP bind hash list - all tcp_t with state >= BOUND. */
struct tf_s *tcps_bind_fanout;
/* TCP queue hash list - all tcp_t in case they will be an acceptor. */
struct tf_s *tcps_acceptor_fanout;
/*
* MIB-2 stuff for SNMP
* Note: tcpInErrs {tcp 15} is accumulated in ip.c
*/
kstat_t *tcps_mibkp; /* kstat exporting mib2_tcp_t data */
kstat_t *tcps_kstat; /* kstat exporting tcp_stat_t data */
uint32_t tcps_iss_incr_extra;
/* Incremented for each connection */
kmutex_t tcps_iss_key_lock;
MD5_CTX tcps_iss_key;
/* Packet dropper for TCP IPsec policy drops. */
ipdropper_t tcps_dropper;
/*
* These two variables control the rate for TCP to generate RSTs in
* response to segments not belonging to any connections. We limit
* TCP to sent out tcp_rst_sent_rate (ndd param) number of RSTs in
* each 1 second interval. This is to protect TCP against DoS attack.
*/
int64_t tcps_last_rst_intrvl;
uint32_t tcps_rst_cnt;
ldi_ident_t tcps_ldi_ident;
/* Used to synchronize access when reclaiming memory */
mblk_t *tcps_ixa_cleanup_mp;
kmutex_t tcps_ixa_cleanup_lock;
kcondvar_t tcps_ixa_cleanup_ready_cv;
kcondvar_t tcps_ixa_cleanup_done_cv;
/* Variables for handling kmem reclaim call back. */
kmutex_t tcps_reclaim_lock;
boolean_t tcps_reclaim;
timeout_id_t tcps_reclaim_tid;
uint32_t tcps_reclaim_period;
/* Listener connection limit configuration. */
kmutex_t tcps_listener_conf_lock;
list_t tcps_listener_conf;
struct cc_algo *tcps_default_cc_algo;
/*
* Per CPU stats
*
* tcps_sc: array of pointer to per CPU stats. The i-th element in the
* array represents the stats of the CPU with cpu_seqid.
* tcps_sc_cnt: number of CPU stats in the tcps_sc array.
*/
tcp_stats_cpu_t **tcps_sc;
int tcps_sc_cnt;
};
typedef struct tcp_stack tcp_stack_t;
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _INET_TCP_STACK_H */
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