1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 #ifndef _INET_TCP_STACK_H 27 #define _INET_TCP_STACK_H 28 29 #include <sys/netstack.h> 30 #include <inet/ip.h> 31 #include <inet/ipdrop.h> 32 #include <inet/tcp_stats.h> 33 #include <sys/sunddi.h> 34 #include <sys/sunldi.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 #ifdef _KERNEL 41 42 /* 43 * TCP stack instances 44 */ 45 struct tcp_stack { 46 netstack_t *tcps_netstack; /* Common netstack */ 47 48 /* 49 * Extra privileged ports. In host byte order. 50 * Protected by tcp_epriv_port_lock. 51 */ 52 #define TCP_NUM_EPRIV_PORTS 64 53 int tcps_g_num_epriv_ports; 54 in_port_t tcps_g_epriv_ports[TCP_NUM_EPRIV_PORTS]; 55 kmutex_t tcps_epriv_port_lock; 56 57 /* 58 * The smallest anonymous port in the priviledged port range which TCP 59 * looks for free port. Use in the option TCP_ANONPRIVBIND. 60 */ 61 in_port_t tcps_min_anonpriv_port; 62 63 /* holds the tcp tunables */ 64 struct mod_prop_info_s *tcps_propinfo_tbl; 65 66 /* Hint not protected by any lock */ 67 uint_t tcps_next_port_to_try; 68 69 /* TCP bind hash list - all tcp_t with state >= BOUND. */ 70 struct tf_s *tcps_bind_fanout; 71 72 /* TCP queue hash list - all tcp_t in case they will be an acceptor. */ 73 struct tf_s *tcps_acceptor_fanout; 74 75 /* 76 * MIB-2 stuff for SNMP 77 * Note: tcpInErrs {tcp 15} is accumulated in ip.c 78 */ 79 kstat_t *tcps_mibkp; /* kstat exporting mib2_tcp_t data */ 80 kstat_t *tcps_kstat; /* kstat exporting tcp_stat_t data */ 81 82 uint32_t tcps_iss_incr_extra; 83 /* Incremented for each connection */ 84 kmutex_t tcps_iss_key_lock; 85 MD5_CTX tcps_iss_key; 86 87 /* Packet dropper for TCP IPsec policy drops. */ 88 ipdropper_t tcps_dropper; 89 90 /* 91 * These two variables control the rate for TCP to generate RSTs in 92 * response to segments not belonging to any connections. We limit 93 * TCP to sent out tcp_rst_sent_rate (ndd param) number of RSTs in 94 * each 1 second interval. This is to protect TCP against DoS attack. 95 */ 96 int64_t tcps_last_rst_intrvl; 97 uint32_t tcps_rst_cnt; 98 99 ldi_ident_t tcps_ldi_ident; 100 101 /* Used to synchronize access when reclaiming memory */ 102 mblk_t *tcps_ixa_cleanup_mp; 103 kmutex_t tcps_ixa_cleanup_lock; 104 kcondvar_t tcps_ixa_cleanup_cv; 105 106 /* Variables for handling kmem reclaim call back. */ 107 kmutex_t tcps_reclaim_lock; 108 boolean_t tcps_reclaim; 109 timeout_id_t tcps_reclaim_tid; 110 uint32_t tcps_reclaim_period; 111 112 /* Listener connection limit configuration. */ 113 kmutex_t tcps_listener_conf_lock; 114 list_t tcps_listener_conf; 115 116 /* 117 * Per CPU stats 118 * 119 * tcps_sc: array of pointer to per CPU stats. The i-th element in the 120 * array represents the stats of the CPU with cpu_seqid. 121 * tcps_sc_cnt: number of CPU stats in the tcps_sc array. 122 */ 123 tcp_stats_cpu_t **tcps_sc; 124 int tcps_sc_cnt; 125 }; 126 127 typedef struct tcp_stack tcp_stack_t; 128 129 #endif /* _KERNEL */ 130 #ifdef __cplusplus 131 } 132 #endif 133 134 #endif /* _INET_TCP_STACK_H */ 135