forked from mirrors/linux
92548ec2f1
There are 3 timers described in rfc8899#section-5.1.1: PROBE_TIMER, PMTU_RAISE_TIMER, CONFIRMATION_TIMER This patches adds a 'probe_timer' in transport, and it works as either PROBE_TIMER or PMTU_RAISE_TIMER. At most time, it works as PROBE_TIMER and expires every a 'probe_interval' time to send the HB probe packet. When transport pl enters COMPLETE state, it works as PMTU_RAISE_TIMER and expires in 'probe_interval * 30' time to go back to SEARCH state and do searching again. SCTP HB is an acknowledged packet, CONFIRMATION_TIMER is not needed. The timer will start when transport pl enters BASE state and stop when it enters DISABLED state. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
170 lines
3.8 KiB
C
170 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001 Intel Corp.
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*
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* This file is part of the SCTP kernel implementation
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*
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* This file converts numerical ID value to alphabetical names for SCTP
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* terms such as chunk type, parameter time, event type, etc.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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* Xingang Guo <xingang.guo@intel.com>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Daisy Chang <daisyc@us.ibm.com>
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* Sridhar Samudrala <sri@us.ibm.com>
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*/
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#include <net/sctp/sctp.h>
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/* These are printable forms of Chunk ID's from section 3.1. */
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static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
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"DATA",
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"INIT",
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"INIT_ACK",
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"SACK",
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"HEARTBEAT",
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"HEARTBEAT_ACK",
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"ABORT",
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"SHUTDOWN",
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"SHUTDOWN_ACK",
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"ERROR",
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"COOKIE_ECHO",
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"COOKIE_ACK",
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"ECN_ECNE",
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"ECN_CWR",
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"SHUTDOWN_COMPLETE",
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};
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/* Lookup "chunk type" debug name. */
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const char *sctp_cname(const union sctp_subtype cid)
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{
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if (cid.chunk <= SCTP_CID_BASE_MAX)
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return sctp_cid_tbl[cid.chunk];
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switch (cid.chunk) {
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case SCTP_CID_ASCONF:
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return "ASCONF";
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case SCTP_CID_ASCONF_ACK:
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return "ASCONF_ACK";
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case SCTP_CID_FWD_TSN:
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return "FWD_TSN";
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case SCTP_CID_AUTH:
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return "AUTH";
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case SCTP_CID_RECONF:
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return "RECONF";
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case SCTP_CID_I_DATA:
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return "I_DATA";
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case SCTP_CID_I_FWD_TSN:
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return "I_FWD_TSN";
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default:
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break;
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}
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return "unknown chunk";
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}
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/* These are printable forms of the states. */
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const char *const sctp_state_tbl[SCTP_STATE_NUM_STATES] = {
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"STATE_CLOSED",
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"STATE_COOKIE_WAIT",
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"STATE_COOKIE_ECHOED",
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"STATE_ESTABLISHED",
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"STATE_SHUTDOWN_PENDING",
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"STATE_SHUTDOWN_SENT",
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"STATE_SHUTDOWN_RECEIVED",
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"STATE_SHUTDOWN_ACK_SENT",
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};
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/* Events that could change the state of an association. */
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const char *const sctp_evttype_tbl[] = {
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"EVENT_T_unknown",
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"EVENT_T_CHUNK",
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"EVENT_T_TIMEOUT",
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"EVENT_T_OTHER",
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"EVENT_T_PRIMITIVE"
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};
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/* Return value of a state function */
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const char *const sctp_status_tbl[] = {
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"DISPOSITION_DISCARD",
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"DISPOSITION_CONSUME",
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"DISPOSITION_NOMEM",
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"DISPOSITION_DELETE_TCB",
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"DISPOSITION_ABORT",
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"DISPOSITION_VIOLATION",
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"DISPOSITION_NOT_IMPL",
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"DISPOSITION_ERROR",
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"DISPOSITION_BUG"
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};
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/* Printable forms of primitives */
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static const char *const sctp_primitive_tbl[SCTP_NUM_PRIMITIVE_TYPES] = {
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"PRIMITIVE_ASSOCIATE",
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"PRIMITIVE_SHUTDOWN",
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"PRIMITIVE_ABORT",
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"PRIMITIVE_SEND",
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"PRIMITIVE_REQUESTHEARTBEAT",
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"PRIMITIVE_ASCONF",
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};
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/* Lookup primitive debug name. */
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const char *sctp_pname(const union sctp_subtype id)
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{
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if (id.primitive <= SCTP_EVENT_PRIMITIVE_MAX)
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return sctp_primitive_tbl[id.primitive];
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return "unknown_primitive";
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}
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static const char *const sctp_other_tbl[] = {
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"NO_PENDING_TSN",
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"ICMP_PROTO_UNREACH",
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};
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/* Lookup "other" debug name. */
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const char *sctp_oname(const union sctp_subtype id)
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{
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if (id.other <= SCTP_EVENT_OTHER_MAX)
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return sctp_other_tbl[id.other];
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return "unknown 'other' event";
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}
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static const char *const sctp_timer_tbl[] = {
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"TIMEOUT_NONE",
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"TIMEOUT_T1_COOKIE",
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"TIMEOUT_T1_INIT",
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"TIMEOUT_T2_SHUTDOWN",
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"TIMEOUT_T3_RTX",
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"TIMEOUT_T4_RTO",
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"TIMEOUT_T5_SHUTDOWN_GUARD",
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"TIMEOUT_HEARTBEAT",
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"TIMEOUT_RECONF",
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"TIMEOUT_PROBE",
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"TIMEOUT_SACK",
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"TIMEOUT_AUTOCLOSE",
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};
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/* Lookup timer debug name. */
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const char *sctp_tname(const union sctp_subtype id)
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{
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BUILD_BUG_ON(SCTP_EVENT_TIMEOUT_MAX + 1 != ARRAY_SIZE(sctp_timer_tbl));
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if (id.timeout < ARRAY_SIZE(sctp_timer_tbl))
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return sctp_timer_tbl[id.timeout];
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return "unknown_timer";
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}
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