17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*45916cd2Sjpk * Common Development and Distribution License (the "License"). 6*45916cd2Sjpk * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 22*45916cd2Sjpk * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate #include <sys/types.h> 297c478bd9Sstevel@tonic-gate #include <sys/systm.h> 307c478bd9Sstevel@tonic-gate #include <sys/stream.h> 317c478bd9Sstevel@tonic-gate #include <sys/cmn_err.h> 327c478bd9Sstevel@tonic-gate #include <sys/strsubr.h> 337c478bd9Sstevel@tonic-gate #include <sys/strsun.h> 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate #include <netinet/in.h> 367c478bd9Sstevel@tonic-gate #include <netinet/ip6.h> 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate #include <inet/common.h> 397c478bd9Sstevel@tonic-gate #include <inet/ip.h> 407c478bd9Sstevel@tonic-gate #include <inet/mib2.h> 417c478bd9Sstevel@tonic-gate #include <inet/ipclassifier.h> 427c478bd9Sstevel@tonic-gate #include "sctp_impl.h" 437c478bd9Sstevel@tonic-gate #include "sctp_asconf.h" 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate /* Timer block states. */ 467c478bd9Sstevel@tonic-gate typedef enum { 477c478bd9Sstevel@tonic-gate SCTP_TB_RUNNING = 1, 487c478bd9Sstevel@tonic-gate SCTP_TB_IDLE, 497c478bd9Sstevel@tonic-gate /* Could not stop/free before mblk got queued */ 507c478bd9Sstevel@tonic-gate SCTP_TB_RESCHED, /* sctp_tb_time_left contains tick count */ 517c478bd9Sstevel@tonic-gate SCTP_TB_CANCELLED, 527c478bd9Sstevel@tonic-gate SCTP_TB_TO_BE_FREED 537c478bd9Sstevel@tonic-gate } timer_block_state; 547c478bd9Sstevel@tonic-gate 557c478bd9Sstevel@tonic-gate typedef struct sctp_tb_s { 567c478bd9Sstevel@tonic-gate timer_block_state sctp_tb_state; 577c478bd9Sstevel@tonic-gate timeout_id_t sctp_tb_tid; 587c478bd9Sstevel@tonic-gate mblk_t *sctp_tb_mp; 597c478bd9Sstevel@tonic-gate clock_t sctp_tb_time_left; 607c478bd9Sstevel@tonic-gate } sctp_tb_t; 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate static void sctp_timer_fire(sctp_tb_t *); 637c478bd9Sstevel@tonic-gate 647c478bd9Sstevel@tonic-gate /* 657c478bd9Sstevel@tonic-gate * sctp_timer mechanism. 667c478bd9Sstevel@tonic-gate * 677c478bd9Sstevel@tonic-gate * Each timer is represented by a timer mblk. When the 687c478bd9Sstevel@tonic-gate * timer fires, and the sctp_t is busy, the timer mblk will be put on 697c478bd9Sstevel@tonic-gate * the associated sctp_t timer queue so that it can be executed when 707c478bd9Sstevel@tonic-gate * the thread holding the lock on the sctp_t is done with its job. 717c478bd9Sstevel@tonic-gate * 727c478bd9Sstevel@tonic-gate * Note that there is no lock to protect the timer mblk state. The reason 737c478bd9Sstevel@tonic-gate * is that the timer state can only be changed by a thread holding the 747c478bd9Sstevel@tonic-gate * lock on the sctp_t. 757c478bd9Sstevel@tonic-gate * 767c478bd9Sstevel@tonic-gate * The interface consists of 4 entry points: 777c478bd9Sstevel@tonic-gate * sctp_timer_alloc - create a timer mblk 787c478bd9Sstevel@tonic-gate * sctp_timer_free - free a timer mblk 797c478bd9Sstevel@tonic-gate * sctp_timer - start, restart, stop the timer 807c478bd9Sstevel@tonic-gate * sctp_timer_valid - called by sctp_process_recvq to verify that 817c478bd9Sstevel@tonic-gate * the timer did indeed fire. 827c478bd9Sstevel@tonic-gate */ 837c478bd9Sstevel@tonic-gate 847c478bd9Sstevel@tonic-gate 857c478bd9Sstevel@tonic-gate /* 867c478bd9Sstevel@tonic-gate * Start, restart, stop the timer. 877c478bd9Sstevel@tonic-gate * If "tim" is -1 the timer is stopped. 887c478bd9Sstevel@tonic-gate * Otherwise, the timer is stopped if it is already running, and 897c478bd9Sstevel@tonic-gate * set to fire tim clock ticks from now. 907c478bd9Sstevel@tonic-gate */ 917c478bd9Sstevel@tonic-gate void 927c478bd9Sstevel@tonic-gate sctp_timer(sctp_t *sctp, mblk_t *mp, clock_t tim) 937c478bd9Sstevel@tonic-gate { 947c478bd9Sstevel@tonic-gate sctp_tb_t *sctp_tb; 957c478bd9Sstevel@tonic-gate int state; 967c478bd9Sstevel@tonic-gate 977c478bd9Sstevel@tonic-gate ASSERT(sctp != NULL && mp != NULL); 987c478bd9Sstevel@tonic-gate ASSERT((mp->b_rptr - mp->b_datap->db_base) == sizeof (sctp_tb_t)); 997c478bd9Sstevel@tonic-gate ASSERT(mp->b_datap->db_type == M_PCSIG); 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate sctp_tb = (sctp_tb_t *)mp->b_datap->db_base; 1027c478bd9Sstevel@tonic-gate if (tim >= 0) { 1037c478bd9Sstevel@tonic-gate state = sctp_tb->sctp_tb_state; 1047c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_time_left = tim; 1057c478bd9Sstevel@tonic-gate if (state == SCTP_TB_RUNNING) { 1067c478bd9Sstevel@tonic-gate if (untimeout(sctp_tb->sctp_tb_tid) < 0) { 1077c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_RESCHED; 1087c478bd9Sstevel@tonic-gate /* sctp_timer_valid will start timer */ 1097c478bd9Sstevel@tonic-gate return; 1107c478bd9Sstevel@tonic-gate } 1117c478bd9Sstevel@tonic-gate } else if (state != SCTP_TB_IDLE) { 1127c478bd9Sstevel@tonic-gate ASSERT(state != SCTP_TB_TO_BE_FREED); 1137c478bd9Sstevel@tonic-gate if (state == SCTP_TB_CANCELLED) { 1147c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_RESCHED; 1157c478bd9Sstevel@tonic-gate /* sctp_timer_valid will start timer */ 1167c478bd9Sstevel@tonic-gate return; 1177c478bd9Sstevel@tonic-gate } 1187c478bd9Sstevel@tonic-gate if (state == SCTP_TB_RESCHED) { 1197c478bd9Sstevel@tonic-gate /* sctp_timer_valid will start timer */ 1207c478bd9Sstevel@tonic-gate return; 1217c478bd9Sstevel@tonic-gate } 1227c478bd9Sstevel@tonic-gate } else { 1237c478bd9Sstevel@tonic-gate SCTP_REFHOLD(sctp); 1247c478bd9Sstevel@tonic-gate } 1257c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_RUNNING; 1267c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_tid = 1277c478bd9Sstevel@tonic-gate timeout((pfv_t)sctp_timer_fire, sctp_tb, tim); 1287c478bd9Sstevel@tonic-gate return; 1297c478bd9Sstevel@tonic-gate } 1307c478bd9Sstevel@tonic-gate switch (tim) { 1317c478bd9Sstevel@tonic-gate case -1: 1327c478bd9Sstevel@tonic-gate sctp_timer_stop(mp); 1337c478bd9Sstevel@tonic-gate break; 1347c478bd9Sstevel@tonic-gate default: 1357c478bd9Sstevel@tonic-gate ASSERT(0); 1367c478bd9Sstevel@tonic-gate break; 1377c478bd9Sstevel@tonic-gate } 1387c478bd9Sstevel@tonic-gate } 1397c478bd9Sstevel@tonic-gate 1407c478bd9Sstevel@tonic-gate /* 1417c478bd9Sstevel@tonic-gate * sctp_timer_alloc is called by sctp_init to allocate and initialize a 1427c478bd9Sstevel@tonic-gate * sctp timer. 1437c478bd9Sstevel@tonic-gate * 1447c478bd9Sstevel@tonic-gate * Allocate an M_PCSIG timer message. The space between db_base and 1457c478bd9Sstevel@tonic-gate * b_rptr is used by the sctp_timer mechanism, and after b_rptr there is 1467c478bd9Sstevel@tonic-gate * space for sctpt_t. 1477c478bd9Sstevel@tonic-gate */ 1487c478bd9Sstevel@tonic-gate mblk_t * 1497c478bd9Sstevel@tonic-gate sctp_timer_alloc(sctp_t *sctp, pfv_t func) 1507c478bd9Sstevel@tonic-gate { 1517c478bd9Sstevel@tonic-gate mblk_t *mp; 1527c478bd9Sstevel@tonic-gate sctp_tb_t *sctp_tb; 1537c478bd9Sstevel@tonic-gate sctpt_t *sctpt; 1547c478bd9Sstevel@tonic-gate 1557c478bd9Sstevel@tonic-gate if ((mp = allocb(sizeof (sctp_t) + sizeof (sctp_tb_t), BPRI_HI))) { 1567c478bd9Sstevel@tonic-gate mp->b_datap->db_type = M_PCSIG; 1577c478bd9Sstevel@tonic-gate sctp_tb = (sctp_tb_t *)mp->b_datap->db_base; 1587c478bd9Sstevel@tonic-gate mp->b_rptr = (uchar_t *)&sctp_tb[1]; 1597c478bd9Sstevel@tonic-gate mp->b_wptr = mp->b_rptr + sizeof (sctpt_t); 1607c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_IDLE; 1617c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_mp = mp; 1627c478bd9Sstevel@tonic-gate 1637c478bd9Sstevel@tonic-gate sctpt = (sctpt_t *)mp->b_rptr; 1647c478bd9Sstevel@tonic-gate sctpt->sctpt_sctp = sctp; 1657c478bd9Sstevel@tonic-gate sctpt->sctpt_faddr = NULL; /* set when starting timer */ 1667c478bd9Sstevel@tonic-gate sctpt->sctpt_pfv = func; 1677c478bd9Sstevel@tonic-gate return (mp); 1687c478bd9Sstevel@tonic-gate } 1697c478bd9Sstevel@tonic-gate return (NULL); 1707c478bd9Sstevel@tonic-gate } 1717c478bd9Sstevel@tonic-gate 1727c478bd9Sstevel@tonic-gate /* 1737c478bd9Sstevel@tonic-gate * timeout() callback function. 1747c478bd9Sstevel@tonic-gate * Put the message on the process control block's queue. 1757c478bd9Sstevel@tonic-gate * If the timer is stopped or freed after 1767c478bd9Sstevel@tonic-gate * it has fired then sctp_timer() and sctp_timer_valid() will clean 1777c478bd9Sstevel@tonic-gate * things up. 1787c478bd9Sstevel@tonic-gate */ 1797c478bd9Sstevel@tonic-gate static void 1807c478bd9Sstevel@tonic-gate sctp_timer_fire(sctp_tb_t *sctp_tb) 1817c478bd9Sstevel@tonic-gate { 1827c478bd9Sstevel@tonic-gate mblk_t *mp; 1837c478bd9Sstevel@tonic-gate sctp_t *sctp; 1847c478bd9Sstevel@tonic-gate sctpt_t *sctpt; 1857c478bd9Sstevel@tonic-gate 1867c478bd9Sstevel@tonic-gate mp = sctp_tb->sctp_tb_mp; 1877c478bd9Sstevel@tonic-gate ASSERT(sctp_tb == (sctp_tb_t *)mp->b_datap->db_base); 1887c478bd9Sstevel@tonic-gate ASSERT(mp->b_datap->db_type == M_PCSIG); 1897c478bd9Sstevel@tonic-gate 1907c478bd9Sstevel@tonic-gate sctpt = (sctpt_t *)mp->b_rptr; 1917c478bd9Sstevel@tonic-gate sctp = sctpt->sctpt_sctp; 1927c478bd9Sstevel@tonic-gate ASSERT(sctp != NULL); 1937c478bd9Sstevel@tonic-gate 1947c478bd9Sstevel@tonic-gate mutex_enter(&sctp->sctp_lock); 1957c478bd9Sstevel@tonic-gate if (sctp->sctp_running) { 1967c478bd9Sstevel@tonic-gate /* 1977c478bd9Sstevel@tonic-gate * Put the timer mblk to the special sctp_timer_mp list. 1987c478bd9Sstevel@tonic-gate * This timer will be handled when the thread using this 1997c478bd9Sstevel@tonic-gate * SCTP is done with its job. 2007c478bd9Sstevel@tonic-gate */ 2017c478bd9Sstevel@tonic-gate if (sctp->sctp_timer_mp == NULL) { 2027c478bd9Sstevel@tonic-gate SCTP_REFHOLD(sctp); 2037c478bd9Sstevel@tonic-gate sctp->sctp_timer_mp = mp; 2047c478bd9Sstevel@tonic-gate } else { 2057c478bd9Sstevel@tonic-gate linkb(sctp->sctp_timer_mp, mp); 2067c478bd9Sstevel@tonic-gate } 2077c478bd9Sstevel@tonic-gate mp->b_cont = NULL; 2087c478bd9Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 2097c478bd9Sstevel@tonic-gate } else { 2107c478bd9Sstevel@tonic-gate sctp->sctp_running = B_TRUE; 2117c478bd9Sstevel@tonic-gate mutex_exit(&sctp->sctp_lock); 2127c478bd9Sstevel@tonic-gate 2137c478bd9Sstevel@tonic-gate sctp_timer_call(sctp, mp); 2147c478bd9Sstevel@tonic-gate WAKE_SCTP(sctp); 2157c478bd9Sstevel@tonic-gate sctp_process_sendq(sctp); 2167c478bd9Sstevel@tonic-gate } 2177c478bd9Sstevel@tonic-gate SCTP_REFRELE(sctp); 2187c478bd9Sstevel@tonic-gate } 2197c478bd9Sstevel@tonic-gate 2207c478bd9Sstevel@tonic-gate /* 2217c478bd9Sstevel@tonic-gate * Logically free a timer mblk (that might have a pending timeout().) 2227c478bd9Sstevel@tonic-gate * If the timer has fired and the mblk has been put on the queue then 2237c478bd9Sstevel@tonic-gate * sctp_timer_valid will free the mblk. 2247c478bd9Sstevel@tonic-gate */ 2257c478bd9Sstevel@tonic-gate void 2267c478bd9Sstevel@tonic-gate sctp_timer_free(mblk_t *mp) 2277c478bd9Sstevel@tonic-gate { 2287c478bd9Sstevel@tonic-gate sctp_tb_t *sctp_tb; 2297c478bd9Sstevel@tonic-gate int state; 2307c478bd9Sstevel@tonic-gate sctpt_t *sctpt; 2317c478bd9Sstevel@tonic-gate 2327c478bd9Sstevel@tonic-gate ASSERT(mp != NULL); 2337c478bd9Sstevel@tonic-gate ASSERT((mp->b_rptr - mp->b_datap->db_base) == sizeof (sctp_tb_t)); 2347c478bd9Sstevel@tonic-gate ASSERT(mp->b_datap->db_type == M_PCSIG); 2357c478bd9Sstevel@tonic-gate 2367c478bd9Sstevel@tonic-gate sctp_tb = (sctp_tb_t *)mp->b_datap->db_base; 2377c478bd9Sstevel@tonic-gate state = sctp_tb->sctp_tb_state; 2387c478bd9Sstevel@tonic-gate 239*45916cd2Sjpk dprint(5, ("sctp_timer_free %p state %d\n", (void *)mp, state)); 2407c478bd9Sstevel@tonic-gate 2417c478bd9Sstevel@tonic-gate if (state == SCTP_TB_RUNNING) { 2427c478bd9Sstevel@tonic-gate if (untimeout(sctp_tb->sctp_tb_tid) < 0) { 2437c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_TO_BE_FREED; 2447c478bd9Sstevel@tonic-gate /* sctp_timer_valid will free the mblk */ 2457c478bd9Sstevel@tonic-gate return; 2467c478bd9Sstevel@tonic-gate } 2477c478bd9Sstevel@tonic-gate sctpt = (sctpt_t *)mp->b_rptr; 2487c478bd9Sstevel@tonic-gate SCTP_REFRELE(sctpt->sctpt_sctp); 2497c478bd9Sstevel@tonic-gate } else if (state != SCTP_TB_IDLE) { 2507c478bd9Sstevel@tonic-gate ASSERT(state != SCTP_TB_TO_BE_FREED); 2517c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_TO_BE_FREED; 2527c478bd9Sstevel@tonic-gate /* sctp_timer_valid will free the mblk */ 2537c478bd9Sstevel@tonic-gate return; 2547c478bd9Sstevel@tonic-gate } 2557c478bd9Sstevel@tonic-gate freeb(mp); 2567c478bd9Sstevel@tonic-gate } 2577c478bd9Sstevel@tonic-gate 2587c478bd9Sstevel@tonic-gate /* 2597c478bd9Sstevel@tonic-gate * Called from sctp_timer(,,-1) 2607c478bd9Sstevel@tonic-gate */ 2617c478bd9Sstevel@tonic-gate void 2627c478bd9Sstevel@tonic-gate sctp_timer_stop(mblk_t *mp) 2637c478bd9Sstevel@tonic-gate { 2647c478bd9Sstevel@tonic-gate sctp_tb_t *sctp_tb; 2657c478bd9Sstevel@tonic-gate int state; 2667c478bd9Sstevel@tonic-gate sctpt_t *sctpt; 2677c478bd9Sstevel@tonic-gate 2687c478bd9Sstevel@tonic-gate ASSERT(mp != NULL); 2697c478bd9Sstevel@tonic-gate ASSERT(mp->b_datap->db_type == M_PCSIG); 2707c478bd9Sstevel@tonic-gate 2717c478bd9Sstevel@tonic-gate sctp_tb = (sctp_tb_t *)mp->b_datap->db_base; 2727c478bd9Sstevel@tonic-gate state = sctp_tb->sctp_tb_state; 2737c478bd9Sstevel@tonic-gate 274*45916cd2Sjpk dprint(5, ("sctp_timer_stop %p %d\n", (void *)mp, state)); 2757c478bd9Sstevel@tonic-gate 2767c478bd9Sstevel@tonic-gate if (state == SCTP_TB_RUNNING) { 2777c478bd9Sstevel@tonic-gate if (untimeout(sctp_tb->sctp_tb_tid) < 0) { 2787c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_CANCELLED; 2797c478bd9Sstevel@tonic-gate } else { 2807c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_IDLE; 2817c478bd9Sstevel@tonic-gate sctpt = (sctpt_t *)mp->b_rptr; 2827c478bd9Sstevel@tonic-gate SCTP_REFRELE(sctpt->sctpt_sctp); 2837c478bd9Sstevel@tonic-gate } 2847c478bd9Sstevel@tonic-gate } else if (state == SCTP_TB_RESCHED) { 2857c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_CANCELLED; 2867c478bd9Sstevel@tonic-gate } 2877c478bd9Sstevel@tonic-gate } 2887c478bd9Sstevel@tonic-gate 2897c478bd9Sstevel@tonic-gate /* 2907c478bd9Sstevel@tonic-gate * The user of the sctp_timer mechanism is required to call 2917c478bd9Sstevel@tonic-gate * sctp_timer_valid() for each M_PCSIG message processed in the 2927c478bd9Sstevel@tonic-gate * service procedures. 2937c478bd9Sstevel@tonic-gate * sctp_timer_valid will return "true" if the timer actually did fire. 2947c478bd9Sstevel@tonic-gate */ 2957c478bd9Sstevel@tonic-gate 2967c478bd9Sstevel@tonic-gate static boolean_t 2977c478bd9Sstevel@tonic-gate sctp_timer_valid(mblk_t *mp) 2987c478bd9Sstevel@tonic-gate { 2997c478bd9Sstevel@tonic-gate sctp_tb_t *sctp_tb; 3007c478bd9Sstevel@tonic-gate int state; 3017c478bd9Sstevel@tonic-gate sctpt_t *sctpt; 3027c478bd9Sstevel@tonic-gate 3037c478bd9Sstevel@tonic-gate ASSERT(mp != NULL); 3047c478bd9Sstevel@tonic-gate ASSERT(mp->b_datap->db_type == M_PCSIG); 3057c478bd9Sstevel@tonic-gate 3067c478bd9Sstevel@tonic-gate sctp_tb = (sctp_tb_t *)DB_BASE(mp); 3077c478bd9Sstevel@tonic-gate sctpt = (sctpt_t *)mp->b_rptr; 3087c478bd9Sstevel@tonic-gate state = sctp_tb->sctp_tb_state; 3097c478bd9Sstevel@tonic-gate if (state != SCTP_TB_RUNNING) { 3107c478bd9Sstevel@tonic-gate ASSERT(state != SCTP_TB_IDLE); 3117c478bd9Sstevel@tonic-gate if (state == SCTP_TB_TO_BE_FREED) { 3127c478bd9Sstevel@tonic-gate /* 3137c478bd9Sstevel@tonic-gate * sctp_timer_free was called after the message 3147c478bd9Sstevel@tonic-gate * was putq'ed. 3157c478bd9Sstevel@tonic-gate */ 3167c478bd9Sstevel@tonic-gate freeb(mp); 3177c478bd9Sstevel@tonic-gate return (B_FALSE); 3187c478bd9Sstevel@tonic-gate } 3197c478bd9Sstevel@tonic-gate if (state == SCTP_TB_CANCELLED) { 3207c478bd9Sstevel@tonic-gate /* The timer was stopped after the mblk was putq'ed */ 3217c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_IDLE; 3227c478bd9Sstevel@tonic-gate return (B_FALSE); 3237c478bd9Sstevel@tonic-gate } 3247c478bd9Sstevel@tonic-gate if (state == SCTP_TB_RESCHED) { 3257c478bd9Sstevel@tonic-gate /* 3267c478bd9Sstevel@tonic-gate * The timer was stopped and then restarted after 3277c478bd9Sstevel@tonic-gate * the mblk was putq'ed. 3287c478bd9Sstevel@tonic-gate * sctp_tb_time_left contains the number of ticks that 3297c478bd9Sstevel@tonic-gate * the timer was restarted with. 3307c478bd9Sstevel@tonic-gate * The sctp will not be disapper between the time 3317c478bd9Sstevel@tonic-gate * the sctpt_t is marked SCTP_TB_RESCHED and when 3327c478bd9Sstevel@tonic-gate * we get here as sctp_add_recvq() does a refhold. 3337c478bd9Sstevel@tonic-gate */ 3347c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_RUNNING; 3357c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_tid = timeout((pfv_t)sctp_timer_fire, 3367c478bd9Sstevel@tonic-gate sctp_tb, sctp_tb->sctp_tb_time_left); 3377c478bd9Sstevel@tonic-gate SCTP_REFHOLD(sctpt->sctpt_sctp); 3387c478bd9Sstevel@tonic-gate return (B_FALSE); 3397c478bd9Sstevel@tonic-gate } 3407c478bd9Sstevel@tonic-gate } 3417c478bd9Sstevel@tonic-gate sctp_tb->sctp_tb_state = SCTP_TB_IDLE; 3427c478bd9Sstevel@tonic-gate return (B_TRUE); 3437c478bd9Sstevel@tonic-gate } 3447c478bd9Sstevel@tonic-gate 3457c478bd9Sstevel@tonic-gate /* 3467c478bd9Sstevel@tonic-gate * The SCTP timer call. Calls sctp_timer_valid() to verify whether 3477c478bd9Sstevel@tonic-gate * timer was cancelled or not. 3487c478bd9Sstevel@tonic-gate */ 3497c478bd9Sstevel@tonic-gate void 3507c478bd9Sstevel@tonic-gate sctp_timer_call(sctp_t *sctp, mblk_t *mp) 3517c478bd9Sstevel@tonic-gate { 3527c478bd9Sstevel@tonic-gate sctpt_t *sctpt = (sctpt_t *)mp->b_rptr; 3537c478bd9Sstevel@tonic-gate 3547c478bd9Sstevel@tonic-gate if (sctp_timer_valid(mp)) { 3557c478bd9Sstevel@tonic-gate (*sctpt->sctpt_pfv)(sctp, sctpt->sctpt_faddr); 3567c478bd9Sstevel@tonic-gate } 3577c478bd9Sstevel@tonic-gate } 3587c478bd9Sstevel@tonic-gate 3597c478bd9Sstevel@tonic-gate /* 3607c478bd9Sstevel@tonic-gate * Delayed ack 3617c478bd9Sstevel@tonic-gate */ 3627c478bd9Sstevel@tonic-gate void 3637c478bd9Sstevel@tonic-gate sctp_ack_timer(sctp_t *sctp) 3647c478bd9Sstevel@tonic-gate { 3657c478bd9Sstevel@tonic-gate sctp->sctp_ack_timer_running = 0; 3667c478bd9Sstevel@tonic-gate sctp->sctp_sack_toggle = 2; 3677c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpOutAckDelayed); 3687c478bd9Sstevel@tonic-gate sctp_sack(sctp, NULL); 3697c478bd9Sstevel@tonic-gate } 3707c478bd9Sstevel@tonic-gate 3717c478bd9Sstevel@tonic-gate /* 3727c478bd9Sstevel@tonic-gate * Peer address heartbeat timer handler 3737c478bd9Sstevel@tonic-gate */ 3747c478bd9Sstevel@tonic-gate void 3757c478bd9Sstevel@tonic-gate sctp_heartbeat_timer(sctp_t *sctp) 3767c478bd9Sstevel@tonic-gate { 3777c478bd9Sstevel@tonic-gate sctp_faddr_t *fp; 3787c478bd9Sstevel@tonic-gate int64_t now; 3797c478bd9Sstevel@tonic-gate int64_t earliest_expiry; 3807c478bd9Sstevel@tonic-gate int cnt; 3817c478bd9Sstevel@tonic-gate 3827c478bd9Sstevel@tonic-gate if (sctp->sctp_strikes >= sctp->sctp_pa_max_rxt) { 3837c478bd9Sstevel@tonic-gate /* 3847c478bd9Sstevel@tonic-gate * If there is a peer address with no strikes, 3857c478bd9Sstevel@tonic-gate * don't give up yet. If enough other peer 3867c478bd9Sstevel@tonic-gate * address are down, we could otherwise fail 3877c478bd9Sstevel@tonic-gate * the association prematurely. This is a 3887c478bd9Sstevel@tonic-gate * byproduct of our aggressive probe approach 3897c478bd9Sstevel@tonic-gate * when a heartbeat fails to connect. We may 3907c478bd9Sstevel@tonic-gate * wish to revisit this... 3917c478bd9Sstevel@tonic-gate */ 3927c478bd9Sstevel@tonic-gate if (!sctp_is_a_faddr_clean(sctp)) { 3937c478bd9Sstevel@tonic-gate /* time to give up */ 3947c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpAborted); 3957c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimHeartBeatDrop); 3967c478bd9Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_LOST, 0, NULL); 3977c478bd9Sstevel@tonic-gate sctp_clean_death(sctp, sctp->sctp_client_errno ? 3987c478bd9Sstevel@tonic-gate sctp->sctp_client_errno : ETIMEDOUT); 3997c478bd9Sstevel@tonic-gate return; 4007c478bd9Sstevel@tonic-gate } 4017c478bd9Sstevel@tonic-gate } 4027c478bd9Sstevel@tonic-gate 4037c478bd9Sstevel@tonic-gate /* Only send heartbeats in the established state */ 4047c478bd9Sstevel@tonic-gate if (sctp->sctp_state != SCTPS_ESTABLISHED) { 4057c478bd9Sstevel@tonic-gate dprint(5, ("sctp_heartbeat_timer: not in ESTABLISHED\n")); 4067c478bd9Sstevel@tonic-gate return; 4077c478bd9Sstevel@tonic-gate } 4087c478bd9Sstevel@tonic-gate 4097c478bd9Sstevel@tonic-gate now = lbolt64; 4107c478bd9Sstevel@tonic-gate earliest_expiry = 0; 4117c478bd9Sstevel@tonic-gate cnt = sctp_maxburst; 4127c478bd9Sstevel@tonic-gate 4137c478bd9Sstevel@tonic-gate /* 4147c478bd9Sstevel@tonic-gate * Walk through all faddrs. Since the timer should run infrequently 4157c478bd9Sstevel@tonic-gate * and the number of peer addresses should not be big, this should 4167c478bd9Sstevel@tonic-gate * be OK. 4177c478bd9Sstevel@tonic-gate */ 4187c478bd9Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp != NULL; fp = fp->next) { 4197c478bd9Sstevel@tonic-gate /* 4207c478bd9Sstevel@tonic-gate * Don't send heartbeat to this address if 4217c478bd9Sstevel@tonic-gate * 1. it is not reachable OR 4227c478bd9Sstevel@tonic-gate * 2. hb_interval == 0 and the address has been confirmed. 4237c478bd9Sstevel@tonic-gate */ 4247c478bd9Sstevel@tonic-gate if (fp->state == SCTP_FADDRS_UNREACH || 4257c478bd9Sstevel@tonic-gate (fp->hb_interval == 0 && 4267c478bd9Sstevel@tonic-gate fp->state != SCTP_FADDRS_UNCONFIRMED)) { 4277c478bd9Sstevel@tonic-gate continue; 4287c478bd9Sstevel@tonic-gate } 4297c478bd9Sstevel@tonic-gate 4307c478bd9Sstevel@tonic-gate /* 4317c478bd9Sstevel@tonic-gate * The heartbeat timer is expired. If the address is dead, 4327c478bd9Sstevel@tonic-gate * we still send heartbeat to it in case it becomes alive 4337c478bd9Sstevel@tonic-gate * again. But we will only send once every hb_interval. 4347c478bd9Sstevel@tonic-gate * 4357c478bd9Sstevel@tonic-gate * If the address is alive and there is a hearbeat pending, 4367c478bd9Sstevel@tonic-gate * resend the heartbeat and start exponential backoff on the 4377c478bd9Sstevel@tonic-gate * heartbeat timeout value. If there is no heartbeat pending, 4387c478bd9Sstevel@tonic-gate * just send out one. 4397c478bd9Sstevel@tonic-gate */ 4407c478bd9Sstevel@tonic-gate if (now >= fp->hb_expiry) { 4417c478bd9Sstevel@tonic-gate if (fp->hb_pending) { 4427c478bd9Sstevel@tonic-gate /* 4437c478bd9Sstevel@tonic-gate * If an address is not confirmed, no need 4447c478bd9Sstevel@tonic-gate * to bump the overall counter as it doesn't 4457c478bd9Sstevel@tonic-gate * matter as we will not use it to send data 4467c478bd9Sstevel@tonic-gate * and it should not affect the association. 4477c478bd9Sstevel@tonic-gate */ 4487c478bd9Sstevel@tonic-gate switch (fp->state) { 4497c478bd9Sstevel@tonic-gate case SCTP_FADDRS_ALIVE: 4507c478bd9Sstevel@tonic-gate sctp->sctp_strikes++; 4517c478bd9Sstevel@tonic-gate /* FALLTHRU */ 4527c478bd9Sstevel@tonic-gate case SCTP_FADDRS_UNCONFIRMED: 4537c478bd9Sstevel@tonic-gate /* 4547c478bd9Sstevel@tonic-gate * Retransmission implies that RTO 4557c478bd9Sstevel@tonic-gate * is probably not correct. 4567c478bd9Sstevel@tonic-gate */ 4577c478bd9Sstevel@tonic-gate fp->rtt_updates = 0; 4587c478bd9Sstevel@tonic-gate fp->strikes++; 4597c478bd9Sstevel@tonic-gate if (fp->strikes > fp->max_retr) { 4607c478bd9Sstevel@tonic-gate if (sctp_faddr_dead(sctp, fp, 4617c478bd9Sstevel@tonic-gate SCTP_FADDRS_DOWN) == -1) { 4627c478bd9Sstevel@tonic-gate /* Assoc is dead */ 4637c478bd9Sstevel@tonic-gate return; 4647c478bd9Sstevel@tonic-gate } 4657c478bd9Sstevel@tonic-gate /* 4667c478bd9Sstevel@tonic-gate * Addr is down; keep initial 4677c478bd9Sstevel@tonic-gate * RTO 4687c478bd9Sstevel@tonic-gate */ 4697c478bd9Sstevel@tonic-gate fp->rto = 4707c478bd9Sstevel@tonic-gate sctp->sctp_rto_initial; 4717c478bd9Sstevel@tonic-gate goto dead_addr; 4727c478bd9Sstevel@tonic-gate } else { 4737c478bd9Sstevel@tonic-gate SCTP_CALC_RXT(fp, 4747c478bd9Sstevel@tonic-gate sctp->sctp_rto_max); 4757c478bd9Sstevel@tonic-gate fp->hb_expiry = now + fp->rto; 4767c478bd9Sstevel@tonic-gate } 4777c478bd9Sstevel@tonic-gate break; 4787c478bd9Sstevel@tonic-gate case SCTP_FADDRS_DOWN: 4797c478bd9Sstevel@tonic-gate dead_addr: 4807c478bd9Sstevel@tonic-gate fp->hb_expiry = now + SET_HB_INTVL(fp); 4817c478bd9Sstevel@tonic-gate break; 4827c478bd9Sstevel@tonic-gate default: 4837c478bd9Sstevel@tonic-gate continue; 4847c478bd9Sstevel@tonic-gate } 4857c478bd9Sstevel@tonic-gate } else { 4867c478bd9Sstevel@tonic-gate fp->hb_expiry = now + fp->rto; 4877c478bd9Sstevel@tonic-gate } 4887c478bd9Sstevel@tonic-gate /* 4897c478bd9Sstevel@tonic-gate * Note that the total number of heartbeat we can send 4907c478bd9Sstevel@tonic-gate * out simultaneously is limited by sctp_maxburst. If 4917c478bd9Sstevel@tonic-gate * the limit is exceeded, we need to wait for the next 4927c478bd9Sstevel@tonic-gate * timeout to send them. This should only happen if 4937c478bd9Sstevel@tonic-gate * there is unconfirmed address. Note that hb_pending 4947c478bd9Sstevel@tonic-gate * is set in sctp_send_heartbeat(). So if a heartbeat 4957c478bd9Sstevel@tonic-gate * is not sent, it will not affect the state of the 4967c478bd9Sstevel@tonic-gate * peer address. 4977c478bd9Sstevel@tonic-gate */ 4987c478bd9Sstevel@tonic-gate if (fp->state != SCTP_FADDRS_UNCONFIRMED || cnt-- > 0) 4997c478bd9Sstevel@tonic-gate sctp_send_heartbeat(sctp, fp); 5007c478bd9Sstevel@tonic-gate } 5017c478bd9Sstevel@tonic-gate if (fp->hb_expiry < earliest_expiry || earliest_expiry == 0) 5027c478bd9Sstevel@tonic-gate earliest_expiry = fp->hb_expiry; 5037c478bd9Sstevel@tonic-gate } 5047c478bd9Sstevel@tonic-gate if (sctp->sctp_autoclose != 0) { 5057c478bd9Sstevel@tonic-gate int64_t expire; 5067c478bd9Sstevel@tonic-gate 5077c478bd9Sstevel@tonic-gate expire = sctp->sctp_active + sctp->sctp_autoclose; 5087c478bd9Sstevel@tonic-gate 5097c478bd9Sstevel@tonic-gate if (expire <= now) { 5107c478bd9Sstevel@tonic-gate dprint(3, ("sctp_heartbeat_timer: autoclosing\n")); 5117c478bd9Sstevel@tonic-gate sctp_send_shutdown(sctp, 0); 5127c478bd9Sstevel@tonic-gate return; 5137c478bd9Sstevel@tonic-gate } 5147c478bd9Sstevel@tonic-gate if (expire < earliest_expiry || earliest_expiry == 0) 5157c478bd9Sstevel@tonic-gate earliest_expiry = expire; 5167c478bd9Sstevel@tonic-gate } 5177c478bd9Sstevel@tonic-gate 5187c478bd9Sstevel@tonic-gate earliest_expiry -= now; 5197c478bd9Sstevel@tonic-gate if (earliest_expiry < 0) 5207c478bd9Sstevel@tonic-gate earliest_expiry = 1; 5217c478bd9Sstevel@tonic-gate sctp_timer(sctp, sctp->sctp_heartbeat_mp, earliest_expiry); 5227c478bd9Sstevel@tonic-gate } 5237c478bd9Sstevel@tonic-gate 5247c478bd9Sstevel@tonic-gate void 5257c478bd9Sstevel@tonic-gate sctp_rexmit_timer(sctp_t *sctp, sctp_faddr_t *fp) 5267c478bd9Sstevel@tonic-gate { 5277c478bd9Sstevel@tonic-gate mblk_t *mp; 5287c478bd9Sstevel@tonic-gate uint32_t rto_max = sctp->sctp_rto_max; 5297c478bd9Sstevel@tonic-gate 5307c478bd9Sstevel@tonic-gate ASSERT(fp != NULL); 5317c478bd9Sstevel@tonic-gate 5327c478bd9Sstevel@tonic-gate dprint(3, ("sctp_timer: faddr=%x:%x:%x:%x\n", 5337c478bd9Sstevel@tonic-gate SCTP_PRINTADDR(fp->faddr))); 5347c478bd9Sstevel@tonic-gate 5357c478bd9Sstevel@tonic-gate fp->timer_running = 0; 5367c478bd9Sstevel@tonic-gate 5377c478bd9Sstevel@tonic-gate /* Check is we've reached the max for retries */ 5387c478bd9Sstevel@tonic-gate if (sctp->sctp_state < SCTPS_ESTABLISHED) { 5397c478bd9Sstevel@tonic-gate if (fp->strikes >= sctp->sctp_max_init_rxt) { 5407c478bd9Sstevel@tonic-gate /* time to give up */ 5417c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpAborted); 5427c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetransDrop); 5437c478bd9Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_CANT_STR_ASSOC, 0, NULL); 5447c478bd9Sstevel@tonic-gate sctp_clean_death(sctp, sctp->sctp_client_errno ? 5457c478bd9Sstevel@tonic-gate sctp->sctp_client_errno : ETIMEDOUT); 5467c478bd9Sstevel@tonic-gate return; 5477c478bd9Sstevel@tonic-gate } 5487c478bd9Sstevel@tonic-gate } else if (sctp->sctp_state >= SCTPS_ESTABLISHED) { 5497c478bd9Sstevel@tonic-gate if (sctp->sctp_strikes >= sctp->sctp_pa_max_rxt) { 5507c478bd9Sstevel@tonic-gate /* time to give up */ 5517c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpAborted); 5527c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetransDrop); 5537c478bd9Sstevel@tonic-gate sctp_assoc_event(sctp, SCTP_COMM_LOST, 0, NULL); 5547c478bd9Sstevel@tonic-gate sctp_clean_death(sctp, sctp->sctp_client_errno ? 5557c478bd9Sstevel@tonic-gate sctp->sctp_client_errno : ETIMEDOUT); 5567c478bd9Sstevel@tonic-gate return; 5577c478bd9Sstevel@tonic-gate } 5587c478bd9Sstevel@tonic-gate } 5597c478bd9Sstevel@tonic-gate 5607c478bd9Sstevel@tonic-gate if (fp->strikes >= fp->max_retr) { 5617c478bd9Sstevel@tonic-gate if (sctp_faddr_dead(sctp, fp, SCTP_FADDRS_DOWN) == -1) { 5627c478bd9Sstevel@tonic-gate return; 5637c478bd9Sstevel@tonic-gate } 5647c478bd9Sstevel@tonic-gate } 5657c478bd9Sstevel@tonic-gate 5667c478bd9Sstevel@tonic-gate switch (sctp->sctp_state) { 5677c478bd9Sstevel@tonic-gate case SCTPS_ESTABLISHED: 5687c478bd9Sstevel@tonic-gate /* 5697c478bd9Sstevel@tonic-gate * Reset the heartbeat expiry time. We don't need a heartbeat 5707c478bd9Sstevel@tonic-gate * timer running if we are retransmitting. Otherwise, the drop 5717c478bd9Sstevel@tonic-gate * of heartbeat may just make this peer address to be marked 5727c478bd9Sstevel@tonic-gate * dead faster as fp->strikes is also increased for heartbeat. 5737c478bd9Sstevel@tonic-gate */ 5747c478bd9Sstevel@tonic-gate fp->hb_expiry = lbolt64 + SET_HB_INTVL(fp); 5757c478bd9Sstevel@tonic-gate fp->hb_pending = B_FALSE; 5767c478bd9Sstevel@tonic-gate 5777c478bd9Sstevel@tonic-gate /* FALLTHRU */ 5787c478bd9Sstevel@tonic-gate case SCTPS_SHUTDOWN_PENDING: 5797c478bd9Sstevel@tonic-gate case SCTPS_SHUTDOWN_RECEIVED: 5807c478bd9Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_RECEIVED) { 5817c478bd9Sstevel@tonic-gate (void) sctp_shutdown_received(sctp, NULL, 0, 1); 5827c478bd9Sstevel@tonic-gate } 5837c478bd9Sstevel@tonic-gate 5847c478bd9Sstevel@tonic-gate if (sctp->sctp_xmit_head == NULL && 5857c478bd9Sstevel@tonic-gate sctp->sctp_xmit_unsent == NULL) { 5867c478bd9Sstevel@tonic-gate /* Nothing to retransmit */ 5877c478bd9Sstevel@tonic-gate if (sctp->sctp_state == SCTPS_SHUTDOWN_PENDING) { 5887c478bd9Sstevel@tonic-gate sctp_send_shutdown(sctp, 1); 5897c478bd9Sstevel@tonic-gate } 5907c478bd9Sstevel@tonic-gate return; 5917c478bd9Sstevel@tonic-gate } 5927c478bd9Sstevel@tonic-gate 5937c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetrans); 5947c478bd9Sstevel@tonic-gate 5957c478bd9Sstevel@tonic-gate sctp_rexmit(sctp, fp); 5967c478bd9Sstevel@tonic-gate /* 5977c478bd9Sstevel@tonic-gate * sctp_rexmit() will increase the strikes and restart the 5987c478bd9Sstevel@tonic-gate * timer, so return here. 5997c478bd9Sstevel@tonic-gate */ 6007c478bd9Sstevel@tonic-gate return; 6017c478bd9Sstevel@tonic-gate case SCTPS_COOKIE_WAIT: 6027c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_T1expire); 6037c478bd9Sstevel@tonic-gate rxmit_init: 6047c478bd9Sstevel@tonic-gate /* retransmit init */ 605f551bb10Svi /* 606f551bb10Svi * We don't take the conn hash lock here since the source 607f551bb10Svi * address list won't be modified (it would have been done 608f551bb10Svi * the first time around). 609f551bb10Svi */ 6107c478bd9Sstevel@tonic-gate mp = sctp_init_mp(sctp); 6117c478bd9Sstevel@tonic-gate if (mp != NULL) { 6127c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetrans); 6137c478bd9Sstevel@tonic-gate sctp_add_sendq(sctp, mp); 6147c478bd9Sstevel@tonic-gate } 6157c478bd9Sstevel@tonic-gate rto_max = sctp->sctp_init_rto_max; 6167c478bd9Sstevel@tonic-gate break; 6177c478bd9Sstevel@tonic-gate case SCTPS_COOKIE_ECHOED: { 6187c478bd9Sstevel@tonic-gate ipha_t *iph; 6197c478bd9Sstevel@tonic-gate 6207c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_T1expire); 6217c478bd9Sstevel@tonic-gate if (sctp->sctp_cookie_mp == NULL) { 6227c478bd9Sstevel@tonic-gate sctp->sctp_state = SCTPS_COOKIE_WAIT; 6237c478bd9Sstevel@tonic-gate goto rxmit_init; 6247c478bd9Sstevel@tonic-gate } 6257c478bd9Sstevel@tonic-gate mp = dupmsg(sctp->sctp_cookie_mp); 6267c478bd9Sstevel@tonic-gate if (mp == NULL) 6277c478bd9Sstevel@tonic-gate break; 6287c478bd9Sstevel@tonic-gate iph = (ipha_t *)mp->b_rptr; 6297c478bd9Sstevel@tonic-gate /* Reset the IP ident. */ 6307c478bd9Sstevel@tonic-gate if (IPH_HDR_VERSION(iph) == IPV4_VERSION) 6317c478bd9Sstevel@tonic-gate iph->ipha_ident = 0; 6327c478bd9Sstevel@tonic-gate sctp_add_sendq(sctp, mp); 6337c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetrans); 6347c478bd9Sstevel@tonic-gate rto_max = sctp->sctp_init_rto_max; 6357c478bd9Sstevel@tonic-gate break; 6367c478bd9Sstevel@tonic-gate } 6377c478bd9Sstevel@tonic-gate case SCTPS_SHUTDOWN_SENT: 6387c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_T2expire); 6397c478bd9Sstevel@tonic-gate sctp_send_shutdown(sctp, 1); 6407c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetrans); 6417c478bd9Sstevel@tonic-gate break; 6427c478bd9Sstevel@tonic-gate case SCTPS_SHUTDOWN_ACK_SENT: 6437c478bd9Sstevel@tonic-gate /* We shouldn't have any more outstanding data */ 6447c478bd9Sstevel@tonic-gate ASSERT(sctp->sctp_xmit_head == NULL); 6457c478bd9Sstevel@tonic-gate ASSERT(sctp->sctp_xmit_unsent == NULL); 6467c478bd9Sstevel@tonic-gate 6477c478bd9Sstevel@tonic-gate BUMP_LOCAL(sctp->sctp_T2expire); 6487c478bd9Sstevel@tonic-gate (void) sctp_shutdown_received(sctp, NULL, 0, 1); 6497c478bd9Sstevel@tonic-gate BUMP_MIB(&sctp_mib, sctpTimRetrans); 6507c478bd9Sstevel@tonic-gate break; 6517c478bd9Sstevel@tonic-gate default: 6527c478bd9Sstevel@tonic-gate ASSERT(0); 6537c478bd9Sstevel@tonic-gate break; 6547c478bd9Sstevel@tonic-gate } 6557c478bd9Sstevel@tonic-gate 6567c478bd9Sstevel@tonic-gate fp->strikes++; 6577c478bd9Sstevel@tonic-gate sctp->sctp_strikes++; 6587c478bd9Sstevel@tonic-gate SCTP_CALC_RXT(fp, rto_max); 6597c478bd9Sstevel@tonic-gate 6607c478bd9Sstevel@tonic-gate SCTP_FADDR_TIMER_RESTART(sctp, fp, fp->rto); 6617c478bd9Sstevel@tonic-gate } 6627c478bd9Sstevel@tonic-gate 6637c478bd9Sstevel@tonic-gate /* 6647c478bd9Sstevel@tonic-gate * RTO calculation. timesent and now are both in ms. 6657c478bd9Sstevel@tonic-gate */ 6667c478bd9Sstevel@tonic-gate void 6677c478bd9Sstevel@tonic-gate sctp_update_rtt(sctp_t *sctp, sctp_faddr_t *fp, clock_t delta) 6687c478bd9Sstevel@tonic-gate { 6697c478bd9Sstevel@tonic-gate int rtt; 6707c478bd9Sstevel@tonic-gate 6717c478bd9Sstevel@tonic-gate /* Calculate the RTT in ms */ 6727c478bd9Sstevel@tonic-gate rtt = (int)delta; 6737c478bd9Sstevel@tonic-gate rtt = rtt > 0 ? rtt : 1; 6747c478bd9Sstevel@tonic-gate 675*45916cd2Sjpk dprint(5, ("sctp_update_rtt: fp = %p, rtt = %d\n", (void *)fp, rtt)); 6767c478bd9Sstevel@tonic-gate 6777c478bd9Sstevel@tonic-gate /* Is this the first RTT measurement? */ 6787c478bd9Sstevel@tonic-gate if (fp->srtt == -1) { 6797c478bd9Sstevel@tonic-gate fp->srtt = rtt; 6807c478bd9Sstevel@tonic-gate fp->rttvar = rtt / 2; 6817c478bd9Sstevel@tonic-gate fp->rto = 3 * rtt; /* == rtt + 4 * rttvar ( == rtt / 2) */ 6827c478bd9Sstevel@tonic-gate } else { 6837c478bd9Sstevel@tonic-gate int abs; 6847c478bd9Sstevel@tonic-gate /* 6857c478bd9Sstevel@tonic-gate * Versions of the RTO equations that use fixed-point math. 6867c478bd9Sstevel@tonic-gate * alpha and beta are NOT tunable in this implementation, 6877c478bd9Sstevel@tonic-gate * and so are hard-coded in. alpha = 1/8, beta = 1/4. 6887c478bd9Sstevel@tonic-gate */ 6897c478bd9Sstevel@tonic-gate abs = fp->srtt - rtt; 6907c478bd9Sstevel@tonic-gate abs = abs >= 0 ? abs : -abs; 6917c478bd9Sstevel@tonic-gate fp->rttvar = (3 * fp->rttvar + abs) >> 2; 6927c478bd9Sstevel@tonic-gate fp->rttvar = fp->rttvar != 0 ? fp->rttvar : 1; 6937c478bd9Sstevel@tonic-gate 6947c478bd9Sstevel@tonic-gate fp->srtt = (7 * fp->srtt + rtt) >> 3; 6957c478bd9Sstevel@tonic-gate fp->rto = fp->srtt + 4 * fp->rttvar; 6967c478bd9Sstevel@tonic-gate } 6977c478bd9Sstevel@tonic-gate 6987c478bd9Sstevel@tonic-gate dprint(5, ("sctp_update_rtt: srtt = %d, rttvar = %d, rto = %d\n", 6997c478bd9Sstevel@tonic-gate fp->srtt, fp->rttvar, fp->rto)); 7007c478bd9Sstevel@tonic-gate 7017c478bd9Sstevel@tonic-gate /* Bound the RTO by configured min and max values */ 7027c478bd9Sstevel@tonic-gate if (fp->rto < sctp->sctp_rto_min) { 7037c478bd9Sstevel@tonic-gate fp->rto = sctp->sctp_rto_min; 7047c478bd9Sstevel@tonic-gate } 7057c478bd9Sstevel@tonic-gate if (fp->rto > sctp->sctp_rto_max) { 7067c478bd9Sstevel@tonic-gate fp->rto = sctp->sctp_rto_max; 7077c478bd9Sstevel@tonic-gate } 7087c478bd9Sstevel@tonic-gate 7097c478bd9Sstevel@tonic-gate fp->rtt_updates++; 7107c478bd9Sstevel@tonic-gate } 7117c478bd9Sstevel@tonic-gate 7127c478bd9Sstevel@tonic-gate void 7137c478bd9Sstevel@tonic-gate sctp_free_faddr_timers(sctp_t *sctp) 7147c478bd9Sstevel@tonic-gate { 7157c478bd9Sstevel@tonic-gate sctp_faddr_t *fp; 7167c478bd9Sstevel@tonic-gate 7177c478bd9Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp != NULL; fp = fp->next) { 7187c478bd9Sstevel@tonic-gate if (fp->timer_mp != NULL) { 7197c478bd9Sstevel@tonic-gate sctp_timer_free(fp->timer_mp); 7207c478bd9Sstevel@tonic-gate fp->timer_mp = NULL; 7217c478bd9Sstevel@tonic-gate fp->timer_running = 0; 7227c478bd9Sstevel@tonic-gate } 7237c478bd9Sstevel@tonic-gate if (fp->rc_timer_mp != NULL) { 7247c478bd9Sstevel@tonic-gate sctp_timer_free(fp->rc_timer_mp); 7257c478bd9Sstevel@tonic-gate fp->rc_timer_mp = NULL; 7267c478bd9Sstevel@tonic-gate fp->rc_timer_running = 0; 7277c478bd9Sstevel@tonic-gate } 7287c478bd9Sstevel@tonic-gate } 7297c478bd9Sstevel@tonic-gate } 7307c478bd9Sstevel@tonic-gate 7317c478bd9Sstevel@tonic-gate void 7327c478bd9Sstevel@tonic-gate sctp_stop_faddr_timers(sctp_t *sctp) 7337c478bd9Sstevel@tonic-gate { 7347c478bd9Sstevel@tonic-gate sctp_faddr_t *fp; 7357c478bd9Sstevel@tonic-gate 7367c478bd9Sstevel@tonic-gate for (fp = sctp->sctp_faddrs; fp != NULL; fp = fp->next) { 7377c478bd9Sstevel@tonic-gate SCTP_FADDR_TIMER_STOP(fp); 7387c478bd9Sstevel@tonic-gate SCTP_FADDR_RC_TIMER_STOP(fp); 7397c478bd9Sstevel@tonic-gate } 7407c478bd9Sstevel@tonic-gate } 7417c478bd9Sstevel@tonic-gate 7427c478bd9Sstevel@tonic-gate void 7437c478bd9Sstevel@tonic-gate sctp_process_timer(sctp_t *sctp) 7447c478bd9Sstevel@tonic-gate { 7457c478bd9Sstevel@tonic-gate mblk_t *mp; 7467c478bd9Sstevel@tonic-gate 7477c478bd9Sstevel@tonic-gate ASSERT(sctp->sctp_running); 7487c478bd9Sstevel@tonic-gate ASSERT(MUTEX_HELD(&sctp->sctp_lock)); 7497c478bd9Sstevel@tonic-gate while ((mp = sctp->sctp_timer_mp) != NULL) { 7507c478bd9Sstevel@tonic-gate ASSERT(DB_TYPE(mp) == M_PCSIG); 7517c478bd9Sstevel@tonic-gate /* 7527c478bd9Sstevel@tonic-gate * Since the timer mblk can be freed in sctp_timer_call(), 7537c478bd9Sstevel@tonic-gate * we need to grab the b_cont before that. 7547c478bd9Sstevel@tonic-gate */ 7557c478bd9Sstevel@tonic-gate sctp->sctp_timer_mp = mp->b_cont; 7567c478bd9Sstevel@tonic-gate mp->b_cont = NULL; 7577c478bd9Sstevel@tonic-gate sctp_timer_call(sctp, mp); 7587c478bd9Sstevel@tonic-gate } 7597c478bd9Sstevel@tonic-gate SCTP_REFRELE(sctp); 7607c478bd9Sstevel@tonic-gate } 761