/* * 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 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #ifndef _INET_TCP_IMPL_H #define _INET_TCP_IMPL_H /* * TCP implementation private declarations. These interfaces are * used to build the IP module and are not meant to be accessed * by any modules except IP itself. They are undocumented and are * subject to change without notice. */ #ifdef __cplusplus extern "C" { #endif #ifdef _KERNEL #include #include #define TCP_MOD_ID 5105 /* * Was this tcp created via socket() interface? */ #define TCP_IS_SOCKET(tcp) ((tcp)->tcp_issocket) /* * Is this tcp not attached to any upper client? */ #define TCP_IS_DETACHED(tcp) ((tcp)->tcp_detached) #define TCP_TIMER(tcp, f, tim) \ tcp_timeout(tcp->tcp_connp, f, tim) #define TCP_TIMER_CANCEL(tcp, id) \ tcp_timeout_cancel(tcp->tcp_connp, id) /* * To restart the TCP retransmission timer. */ #define TCP_TIMER_RESTART(tcp, intvl) { \ if ((tcp)->tcp_timer_tid != 0) \ (void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid); \ (tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer, \ MSEC_TO_TICK(intvl)); \ } /* * Before caching the conn IRE, we need to make sure certain TCP * states are in sync with the ire. The mismatch could occur if the * TCP state has been set in tcp_adapt_ire() using a different IRE, * e.g if an address was not present during an initial connect(), * tcp_adapt_ire() will set the state using the interface route. * Subsequently, if the address is added to the local machine, the * retransmitted SYN will get the correct (loopback) IRE, but the TCP * state (tcp_loopback and tcp_localnet) will remain out of sync. * This is especially an issue with TCP fusion which relies on the * TCP state to be accurate. * * This check/change should be made only if the TCP is not yet in * the established state, else it would lead to inconsistencies. */ #define TCP_CHECK_IREINFO(tcp, ire) { \ if ((tcp)->tcp_state < TCPS_ESTABLISHED) { \ if (((ire)->ire_type & (IRE_LOOPBACK | \ IRE_LOCAL)) && !(tcp)->tcp_loopback) { \ (tcp)->tcp_loopback = B_TRUE; \ } else if ((tcp)->tcp_loopback && \ !((ire)->ire_type & (IRE_LOOPBACK | IRE_LOCAL))) { \ (tcp)->tcp_loopback = B_FALSE; \ } \ if ((tcp)->tcp_ipversion == IPV4_VERSION) { \ (tcp)->tcp_localnet = \ ((ire)->ire_gateway_addr == 0); \ } else { \ (tcp)->tcp_localnet = \ IN6_IS_ADDR_UNSPECIFIED( \ &(ire)->ire_gateway_addr_v6); \ } \ } \ } /* * Write-side flow-control is implemented via the per instance STREAMS * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s) * and clearing QFULL and calling qbackenable() to restart the flow based * on the number of TCP unsent bytes (i.e. those not on the wire waiting * for a remote ACK). * * This is different than a standard STREAMS kmod which when using the * STREAMS Q the framework would automatictly flow-control based on the * defined hiwat/lowat values as mblk_t's are enqueued/dequeued. * * As of FireEngine TCP write-side flow-control needs to take into account * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes * (i.e. from tcp_wput() -> tcp_output()). * * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to * count the number of bytes enqueued by tcp_wput() and the number of bytes * dequeued and processed by tcp_output(). * * So, the total number of bytes unsent is (squeue_bytes + unsent) with all * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES. */ extern void tcp_clrqfull(tcp_t *); extern void tcp_setqfull(tcp_t *); #define TCP_UNSENT_BYTES(tcp) \ ((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent) /* Named Dispatch Parameter Management Structure */ typedef struct tcpparam_s { uint32_t tcp_param_min; uint32_t tcp_param_max; uint32_t tcp_param_val; char *tcp_param_name; } tcpparam_t; #define tcps_time_wait_interval tcps_params[0].tcp_param_val #define tcps_conn_req_max_q tcps_params[1].tcp_param_val #define tcps_conn_req_max_q0 tcps_params[2].tcp_param_val #define tcps_conn_req_min tcps_params[3].tcp_param_val #define tcps_conn_grace_period tcps_params[4].tcp_param_val #define tcps_cwnd_max_ tcps_params[5].tcp_param_val #define tcps_dbg tcps_params[6].tcp_param_val #define tcps_smallest_nonpriv_port tcps_params[7].tcp_param_val #define tcps_ip_abort_cinterval tcps_params[8].tcp_param_val #define tcps_ip_abort_linterval tcps_params[9].tcp_param_val #define tcps_ip_abort_interval tcps_params[10].tcp_param_val #define tcps_ip_notify_cinterval tcps_params[11].tcp_param_val #define tcps_ip_notify_interval tcps_params[12].tcp_param_val #define tcps_ipv4_ttl tcps_params[13].tcp_param_val #define tcps_keepalive_interval_high tcps_params[14].tcp_param_max #define tcps_keepalive_interval tcps_params[14].tcp_param_val #define tcps_keepalive_interval_low tcps_params[14].tcp_param_min #define tcps_maxpsz_multiplier tcps_params[15].tcp_param_val #define tcps_mss_def_ipv4 tcps_params[16].tcp_param_val #define tcps_mss_max_ipv4 tcps_params[17].tcp_param_val #define tcps_mss_min tcps_params[18].tcp_param_val #define tcps_naglim_def tcps_params[19].tcp_param_val #define tcps_rexmit_interval_initial tcps_params[20].tcp_param_val #define tcps_rexmit_interval_max tcps_params[21].tcp_param_val #define tcps_rexmit_interval_min tcps_params[22].tcp_param_val #define tcps_deferred_ack_interval tcps_params[23].tcp_param_val #define tcps_snd_lowat_fraction tcps_params[24].tcp_param_val #define tcps_sth_rcv_hiwat tcps_params[25].tcp_param_val #define __tcps_not_used1 tcps_params[26].tcp_param_val #define tcps_dupack_fast_retransmit tcps_params[27].tcp_param_val #define tcps_ignore_path_mtu tcps_params[28].tcp_param_val #define tcps_smallest_anon_port tcps_params[29].tcp_param_val #define tcps_largest_anon_port tcps_params[30].tcp_param_val #define tcps_xmit_hiwat tcps_params[31].tcp_param_val #define tcps_xmit_lowat tcps_params[32].tcp_param_val #define tcps_recv_hiwat tcps_params[33].tcp_param_val #define tcps_recv_hiwat_minmss tcps_params[34].tcp_param_val #define tcps_fin_wait_2_flush_interval tcps_params[35].tcp_param_val #define tcps_max_buf tcps_params[36].tcp_param_val #define tcps_strong_iss tcps_params[37].tcp_param_val #define tcps_rtt_updates tcps_params[38].tcp_param_val #define tcps_wscale_always tcps_params[39].tcp_param_val #define tcps_tstamp_always tcps_params[40].tcp_param_val #define tcps_tstamp_if_wscale tcps_params[41].tcp_param_val #define tcps_rexmit_interval_extra tcps_params[42].tcp_param_val #define tcps_deferred_acks_max tcps_params[43].tcp_param_val #define tcps_slow_start_after_idle tcps_params[44].tcp_param_val #define tcps_slow_start_initial tcps_params[45].tcp_param_val #define tcps_sack_permitted tcps_params[46].tcp_param_val #define __tcps_not_used2 tcps_params[47].tcp_param_val #define tcps_ipv6_hoplimit tcps_params[48].tcp_param_val #define tcps_mss_def_ipv6 tcps_params[49].tcp_param_val #define tcps_mss_max_ipv6 tcps_params[50].tcp_param_val #define tcps_rev_src_routes tcps_params[51].tcp_param_val #define tcps_local_dack_interval tcps_params[52].tcp_param_val #define tcps_local_dacks_max tcps_params[53].tcp_param_val #define tcps_ecn_permitted tcps_params[54].tcp_param_val #define tcps_rst_sent_rate_enabled tcps_params[55].tcp_param_val #define tcps_rst_sent_rate tcps_params[56].tcp_param_val #define tcps_push_timer_interval tcps_params[57].tcp_param_val #define tcps_use_smss_as_mss_opt tcps_params[58].tcp_param_val #define tcps_keepalive_abort_interval_high tcps_params[59].tcp_param_max #define tcps_keepalive_abort_interval tcps_params[59].tcp_param_val #define tcps_keepalive_abort_interval_low tcps_params[59].tcp_param_min extern struct qinit tcp_rinitv4, tcp_rinitv6; extern boolean_t do_tcp_fusion; extern int tcp_maxpsz_set(tcp_t *, boolean_t); extern void tcp_timers_stop(tcp_t *); extern void tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t); extern void tcp_push_timer(void *); extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), clock_t); extern clock_t tcp_timeout_cancel(conn_t *, timeout_id_t); extern void tcp_fuse(tcp_t *, uchar_t *, tcph_t *); extern void tcp_unfuse(tcp_t *); extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t); extern void tcp_fuse_output_urg(tcp_t *, mblk_t *); extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **); extern size_t tcp_fuse_set_rcv_hiwat(tcp_t *, size_t); extern int tcp_fuse_maxpsz_set(tcp_t *); extern void tcp_fuse_backenable(tcp_t *tcp); /* * Object to represent database of options to search passed to * {sock,tpi}optcom_req() interface routine to take care of option * management and associated methods. */ extern optdb_obj_t tcp_opt_obj; extern uint_t tcp_max_optsize; extern sock_lower_handle_t tcp_create(int, int, int, sock_downcalls_t **, uint_t *, int *, int, cred_t *); extern int tcp_fallback(sock_lower_handle_t, queue_t *, boolean_t, so_proto_quiesced_cb_t); extern sock_downcalls_t sock_tcp_downcalls; #endif /* _KERNEL */ #ifdef __cplusplus } #endif #endif /* _INET_TCP_IMPL_H */