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net/sctp/associola.c
49.6 KB
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/* SCTP kernel implementation |
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* (C) Copyright IBM Corp. 2001, 2004 * Copyright (c) 1999-2000 Cisco, Inc. * Copyright (c) 1999-2001 Motorola, Inc. * Copyright (c) 2001 Intel Corp. * Copyright (c) 2001 La Monte H.P. Yarroll * |
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* This file is part of the SCTP kernel implementation |
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* * This module provides the abstraction for an SCTP association. * |
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* This SCTP implementation is free software; |
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* you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * |
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* This SCTP implementation is distributed in the hope that it |
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License |
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* along with GNU CC; see the file COPYING. If not, see * <http://www.gnu.org/licenses/>. |
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* * Please send any bug reports or fixes you make to the * 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: * La Monte H.P. Yarroll <piggy@acm.org> * Karl Knutson <karl@athena.chicago.il.us> * Jon Grimm <jgrimm@us.ibm.com> * Xingang Guo <xingang.guo@intel.com> * Hui Huang <hui.huang@nokia.com> * Sridhar Samudrala <sri@us.ibm.com> * Daisy Chang <daisyc@us.ibm.com> * Ryan Layer <rmlayer@us.ibm.com> * Kevin Gao <kevin.gao@intel.com> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/types.h> #include <linux/fcntl.h> #include <linux/poll.h> #include <linux/init.h> |
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#include <linux/slab.h> #include <linux/in.h> #include <net/ipv6.h> #include <net/sctp/sctp.h> #include <net/sctp/sm.h> /* Forward declarations for internal functions. */ |
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static void sctp_select_active_and_retran_path(struct sctp_association *asoc); |
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static void sctp_assoc_bh_rcv(struct work_struct *work); |
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static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc); |
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static void sctp_assoc_free_asconf_queue(struct sctp_association *asoc); |
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|
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/* 1st Level Abstractions. */ /* Initialize a new association from provided memory. */ |
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static struct sctp_association *sctp_association_init( struct sctp_association *asoc, const struct sctp_endpoint *ep, const struct sock *sk, enum sctp_scope scope, gfp_t gfp) |
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{ |
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struct net *net = sock_net(sk); |
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struct sctp_sock *sp; |
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struct sctp_paramhdr *p; |
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int i; |
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/* Retrieve the SCTP per socket area. */ sp = sctp_sk((struct sock *)sk); |
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/* Discarding const is appropriate here. */ asoc->ep = (struct sctp_endpoint *)ep; |
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asoc->base.sk = (struct sock *)sk; |
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sctp_endpoint_hold(asoc->ep); |
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sock_hold(asoc->base.sk); /* Initialize the common base substructure. */ asoc->base.type = SCTP_EP_TYPE_ASSOCIATION; /* Initialize the object handling fields. */ |
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refcount_set(&asoc->base.refcnt, 1); |
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/* Initialize the bind addr area. */ sctp_bind_addr_init(&asoc->base.bind_addr, ep->base.bind_addr.port); |
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asoc->state = SCTP_STATE_CLOSED; |
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asoc->cookie_life = ms_to_ktime(sp->assocparams.sasoc_cookie_life); |
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asoc->user_frag = sp->user_frag; |
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/* Set the association max_retrans and RTO values from the * socket values. */ asoc->max_retrans = sp->assocparams.sasoc_asocmaxrxt; |
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asoc->pf_retrans = net->sctp.pf_retrans; |
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|
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asoc->rto_initial = msecs_to_jiffies(sp->rtoinfo.srto_initial); asoc->rto_max = msecs_to_jiffies(sp->rtoinfo.srto_max); asoc->rto_min = msecs_to_jiffies(sp->rtoinfo.srto_min); |
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/* Initialize the association's heartbeat interval based on the * sock configured value. */ asoc->hbinterval = msecs_to_jiffies(sp->hbinterval); /* Initialize path max retrans value. */ asoc->pathmaxrxt = sp->pathmaxrxt; /* Initialize default path MTU. */ asoc->pathmtu = sp->pathmtu; /* Set association default SACK delay */ asoc->sackdelay = msecs_to_jiffies(sp->sackdelay); |
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asoc->sackfreq = sp->sackfreq; |
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/* Set the association default flags controlling * Heartbeat, SACK delay, and Path MTU Discovery. */ asoc->param_flags = sp->param_flags; |
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/* Initialize the maximum number of new data packets that can be sent |
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* in a burst. */ |
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asoc->max_burst = sp->max_burst; |
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|
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/* initialize association timers */ |
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asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] = asoc->rto_initial; asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] = asoc->rto_initial; asoc->timeouts[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] = asoc->rto_initial; |
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/* sctpimpguide Section 2.12.2 * If the 'T5-shutdown-guard' timer is used, it SHOULD be set to the * recommended value of 5 times 'RTO.Max'. */ |
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asoc->timeouts[SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD] |
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= 5 * asoc->rto_max; |
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asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] = asoc->sackdelay; |
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asoc->timeouts[SCTP_EVENT_TIMEOUT_AUTOCLOSE] = sp->autoclose * HZ; |
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|
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/* Initializes the timers */ |
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for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) setup_timer(&asoc->timers[i], sctp_timer_events[i], (unsigned long)asoc); |
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/* Pull default initialization values from the sock options. * Note: This assumes that the values have already been * validated in the sock. */ asoc->c.sinit_max_instreams = sp->initmsg.sinit_max_instreams; asoc->c.sinit_num_ostreams = sp->initmsg.sinit_num_ostreams; asoc->max_init_attempts = sp->initmsg.sinit_max_attempts; asoc->max_init_timeo = msecs_to_jiffies(sp->initmsg.sinit_max_init_timeo); |
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/* Set the local window size for receive. * This is also the rcvbuf space per association. * RFC 6 - A SCTP receiver MUST be able to receive a minimum of * 1500 bytes in one SCTP packet. */ |
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if ((sk->sk_rcvbuf/2) < SCTP_DEFAULT_MINWINDOW) |
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asoc->rwnd = SCTP_DEFAULT_MINWINDOW; else |
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asoc->rwnd = sk->sk_rcvbuf/2; |
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asoc->a_rwnd = asoc->rwnd; |
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/* Use my own max window until I learn something better. */ asoc->peer.rwnd = SCTP_DEFAULT_MAXWINDOW; |
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/* Initialize the receive memory counter */ atomic_set(&asoc->rmem_alloc, 0); |
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init_waitqueue_head(&asoc->wait); asoc->c.my_vtag = sctp_generate_tag(ep); |
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asoc->c.my_port = ep->base.bind_addr.port; asoc->c.initial_tsn = sctp_generate_tsn(ep); asoc->next_tsn = asoc->c.initial_tsn; asoc->ctsn_ack_point = asoc->next_tsn - 1; asoc->adv_peer_ack_point = asoc->ctsn_ack_point; asoc->highest_sacked = asoc->ctsn_ack_point; asoc->last_cwr_tsn = asoc->ctsn_ack_point; |
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|
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/* ADDIP Section 4.1 Asconf Chunk Procedures * * When an endpoint has an ASCONF signaled change to be sent to the * remote endpoint it should do the following: * ... * A2) a serial number should be assigned to the chunk. The serial * number SHOULD be a monotonically increasing number. The serial * numbers SHOULD be initialized at the start of the * association to the same value as the initial TSN. */ asoc->addip_serial = asoc->c.initial_tsn; |
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asoc->strreset_outseq = asoc->c.initial_tsn; |
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|
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INIT_LIST_HEAD(&asoc->addip_chunk_list); |
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INIT_LIST_HEAD(&asoc->asconf_ack_list); |
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/* Make an empty list of remote transport addresses. */ INIT_LIST_HEAD(&asoc->peer.transport_addr_list); /* RFC 2960 5.1 Normal Establishment of an Association * * After the reception of the first data chunk in an * association the endpoint must immediately respond with a * sack to acknowledge the data chunk. Subsequent * acknowledgements should be done as described in Section * 6.2. * * [We implement this by telling a new association that it * already received one packet.] */ asoc->peer.sack_needed = 1; |
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asoc->peer.sack_generation = 1; |
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|
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/* Assume that the peer will tell us if he recognizes ASCONF * as part of INIT exchange. |
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* The sctp_addip_noauth option is there for backward compatibility |
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* and will revert old behavior. |
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*/ |
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if (net->sctp.addip_noauth) |
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asoc->peer.asconf_capable = 1; |
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/* Create an input queue. */ sctp_inq_init(&asoc->base.inqueue); |
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sctp_inq_set_th_handler(&asoc->base.inqueue, sctp_assoc_bh_rcv); |
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/* Create an output queue. */ sctp_outq_init(asoc, &asoc->outqueue); if (!sctp_ulpq_init(&asoc->ulpq, asoc)) goto fail_init; |
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if (sctp_stream_init(&asoc->stream, asoc->c.sinit_num_ostreams, 0, gfp)) |
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goto fail_init; |
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/* Assume that peer would support both address types unless we are * told otherwise. */ asoc->peer.ipv4_address = 1; |
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if (asoc->base.sk->sk_family == PF_INET6) asoc->peer.ipv6_address = 1; |
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INIT_LIST_HEAD(&asoc->asocs); |
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asoc->default_stream = sp->default_stream; asoc->default_ppid = sp->default_ppid; asoc->default_flags = sp->default_flags; asoc->default_context = sp->default_context; asoc->default_timetolive = sp->default_timetolive; |
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asoc->default_rcv_context = sp->default_rcv_context; |
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|
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/* AUTH related initializations */ INIT_LIST_HEAD(&asoc->endpoint_shared_keys); |
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if (sctp_auth_asoc_copy_shkeys(ep, asoc, gfp)) |
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goto stream_free; |
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asoc->active_key_id = ep->active_key_id; |
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asoc->prsctp_enable = ep->prsctp_enable; |
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asoc->reconf_enable = ep->reconf_enable; |
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asoc->strreset_enable = ep->strreset_enable; |
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|
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/* Save the hmacs and chunks list into this association */ if (ep->auth_hmacs_list) memcpy(asoc->c.auth_hmacs, ep->auth_hmacs_list, ntohs(ep->auth_hmacs_list->param_hdr.length)); if (ep->auth_chunk_list) memcpy(asoc->c.auth_chunks, ep->auth_chunk_list, ntohs(ep->auth_chunk_list->param_hdr.length)); /* Get the AUTH random number for this association */ |
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p = (struct sctp_paramhdr *)asoc->c.auth_random; |
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p->type = SCTP_PARAM_RANDOM; |
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p->length = htons(sizeof(*p) + SCTP_AUTH_RANDOM_LENGTH); |
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get_random_bytes(p+1, SCTP_AUTH_RANDOM_LENGTH); |
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return asoc; |
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stream_free: |
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sctp_stream_free(&asoc->stream); |
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fail_init: |
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sock_put(asoc->base.sk); |
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sctp_endpoint_put(asoc->ep); |
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return NULL; } /* Allocate and initialize a new association */ struct sctp_association *sctp_association_new(const struct sctp_endpoint *ep, |
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const struct sock *sk, enum sctp_scope scope, gfp_t gfp) |
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{ struct sctp_association *asoc; |
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asoc = kzalloc(sizeof(*asoc), gfp); |
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if (!asoc) goto fail; if (!sctp_association_init(asoc, ep, sk, scope, gfp)) goto fail_init; |
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SCTP_DBG_OBJCNT_INC(assoc); |
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pr_debug("Created asoc %p ", asoc); |
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return asoc; fail_init: kfree(asoc); fail: return NULL; } /* Free this association if possible. There may still be users, so * the actual deallocation may be delayed. */ void sctp_association_free(struct sctp_association *asoc) { struct sock *sk = asoc->base.sk; struct sctp_transport *transport; struct list_head *pos, *temp; int i; |
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/* Only real associations count against the endpoint, so * don't bother for if this is a temporary association. */ |
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if (!list_empty(&asoc->asocs)) { |
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list_del(&asoc->asocs); /* Decrement the backlog value for a TCP-style listening * socket. */ if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) sk->sk_ack_backlog--; } |
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/* Mark as dead, so other users can know this structure is * going away. */ |
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asoc->base.dead = true; |
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/* Dispose of any data lying around in the outqueue. */ sctp_outq_free(&asoc->outqueue); /* Dispose of any pending messages for the upper layer. */ sctp_ulpq_free(&asoc->ulpq); /* Dispose of any pending chunks on the inqueue. */ sctp_inq_free(&asoc->base.inqueue); |
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sctp_tsnmap_free(&asoc->peer.tsn_map); |
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/* Free stream information. */ |
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sctp_stream_free(&asoc->stream); |
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|
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if (asoc->strreset_chunk) sctp_chunk_free(asoc->strreset_chunk); |
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/* Clean up the bound address list. */ sctp_bind_addr_free(&asoc->base.bind_addr); /* Do we need to go through all of our timers and * delete them? To be safe we will try to delete all, but we * should be able to go through and make a guess based * on our state. */ for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) { |
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if (del_timer(&asoc->timers[i])) |
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sctp_association_put(asoc); } /* Free peer's cached cookie. */ |
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kfree(asoc->peer.cookie); |
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kfree(asoc->peer.peer_random); kfree(asoc->peer.peer_chunks); kfree(asoc->peer.peer_hmacs); |
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/* Release the transport structures. */ list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) { transport = list_entry(pos, struct sctp_transport, transports); |
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list_del_rcu(pos); |
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sctp_unhash_transport(transport); |
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sctp_transport_free(transport); } |
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asoc->peer.transport_count = 0; |
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sctp_asconf_queue_teardown(asoc); |
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|
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/* Free pending address space being deleted */ |
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kfree(asoc->asconf_addr_del_pending); |
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|
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/* AUTH - Free the endpoint shared keys */ sctp_auth_destroy_keys(&asoc->endpoint_shared_keys); /* AUTH - Free the association shared key */ sctp_auth_key_put(asoc->asoc_shared_key); |
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sctp_association_put(asoc); } /* Cleanup and free up an association. */ static void sctp_association_destroy(struct sctp_association *asoc) { |
bb33381d0 net: sctp: rework... |
396 397 398 399 400 |
if (unlikely(!asoc->base.dead)) { WARN(1, "Attempt to destroy undead association %p! ", asoc); return; } |
1da177e4c Linux-2.6.12-rc2 |
401 402 403 404 405 406 407 408 409 |
sctp_endpoint_put(asoc->ep); sock_put(asoc->base.sk); if (asoc->assoc_id != 0) { spin_lock_bh(&sctp_assocs_id_lock); idr_remove(&sctp_assocs_id, asoc->assoc_id); spin_unlock_bh(&sctp_assocs_id_lock); } |
547b792ca net: convert BUG_... |
410 |
WARN_ON(atomic_read(&asoc->rmem_alloc)); |
049b3ff5a [SCTP]: Include u... |
411 |
|
862b5ab95 sctp: kfree_rcu asoc |
412 |
kfree_rcu(asoc, rcu); |
ff2266cdd net: sctp: remove... |
413 |
SCTP_DBG_OBJCNT_DEC(assoc); |
1da177e4c Linux-2.6.12-rc2 |
414 415 416 417 418 419 |
} /* Change the primary destination address for the peer. */ void sctp_assoc_set_primary(struct sctp_association *asoc, struct sctp_transport *transport) { |
319fa2a24 sctp: Correclty s... |
420 421 422 423 424 425 426 427 |
int changeover = 0; /* it's a changeover only if we already have a primary path * that we are changing */ if (asoc->peer.primary_path != NULL && asoc->peer.primary_path != transport) changeover = 1 ; |
1da177e4c Linux-2.6.12-rc2 |
428 429 430 431 432 433 434 435 436 |
asoc->peer.primary_path = transport; /* Set a default msg_name for events. */ memcpy(&asoc->peer.primary_addr, &transport->ipaddr, sizeof(union sctp_addr)); /* If the primary path is changing, assume that the * user wants to use this new path. */ |
ad8fec172 [SCTP]: Verify al... |
437 438 |
if ((transport->state == SCTP_ACTIVE) || (transport->state == SCTP_UNKNOWN)) |
1da177e4c Linux-2.6.12-rc2 |
439 440 441 442 443 444 445 446 447 448 449 450 |
asoc->peer.active_path = transport; /* * SFR-CACC algorithm: * Upon the receipt of a request to change the primary * destination address, on the data structure for the new * primary destination, the sender MUST do the following: * * 1) If CHANGEOVER_ACTIVE is set, then there was a switch * to this destination address earlier. The sender MUST set * CYCLING_CHANGEOVER to indicate that this switch is a * double switch to the same destination address. |
e0e9db178 sctp: Select a wo... |
451 452 453 |
* * Really, only bother is we have data queued or outstanding on * the association. |
1da177e4c Linux-2.6.12-rc2 |
454 |
*/ |
e0e9db178 sctp: Select a wo... |
455 456 |
if (!asoc->outqueue.outstanding_bytes && !asoc->outqueue.out_qlen) return; |
1da177e4c Linux-2.6.12-rc2 |
457 |
if (transport->cacc.changeover_active) |
319fa2a24 sctp: Correclty s... |
458 |
transport->cacc.cycling_changeover = changeover; |
1da177e4c Linux-2.6.12-rc2 |
459 460 461 462 |
/* 2) The sender MUST set CHANGEOVER_ACTIVE to indicate that * a changeover has occurred. */ |
319fa2a24 sctp: Correclty s... |
463 |
transport->cacc.changeover_active = changeover; |
1da177e4c Linux-2.6.12-rc2 |
464 465 466 467 468 469 |
/* 3) The sender MUST store the next TSN to be sent in * next_tsn_at_change. */ transport->cacc.next_tsn_at_change = asoc->next_tsn; } |
3f7a87d2f [SCTP] sctp_conne... |
470 471 472 473 |
/* Remove a transport from an association. */ void sctp_assoc_rm_peer(struct sctp_association *asoc, struct sctp_transport *peer) { |
8376fdc99 sctp: clear the t... |
474 475 476 |
struct sctp_transport *transport; struct list_head *pos; struct sctp_chunk *ch; |
3f7a87d2f [SCTP] sctp_conne... |
477 |
|
bb33381d0 net: sctp: rework... |
478 479 480 |
pr_debug("%s: association:%p addr:%pISpc ", __func__, asoc, &peer->ipaddr.sa); |
3f7a87d2f [SCTP] sctp_conne... |
481 482 483 484 485 486 487 488 |
/* If we are to remove the current retran_path, update it * to the next peer before removing this peer from the list. */ if (asoc->peer.retran_path == peer) sctp_assoc_update_retran_path(asoc); /* Remove this peer from the list. */ |
45122ca26 sctp: Add RCU pro... |
489 |
list_del_rcu(&peer->transports); |
4f0087812 sctp: apply rhash... |
490 491 |
/* Remove this peer from the transport hashtable */ sctp_unhash_transport(peer); |
3f7a87d2f [SCTP] sctp_conne... |
492 493 494 495 496 497 498 499 500 501 |
/* Get the first transport of asoc. */ pos = asoc->peer.transport_addr_list.next; transport = list_entry(pos, struct sctp_transport, transports); /* Update any entries that match the peer to be deleted. */ if (asoc->peer.primary_path == peer) sctp_assoc_set_primary(asoc, transport); if (asoc->peer.active_path == peer) asoc->peer.active_path = transport; |
9494c7c57 sctp: fix oops wh... |
502 503 |
if (asoc->peer.retran_path == peer) asoc->peer.retran_path = transport; |
3f7a87d2f [SCTP] sctp_conne... |
504 505 |
if (asoc->peer.last_data_from == peer) asoc->peer.last_data_from = transport; |
7b9438de0 sctp: add stream ... |
506 507 508 509 510 |
if (asoc->strreset_chunk && asoc->strreset_chunk->transport == peer) { asoc->strreset_chunk->transport = transport; sctp_transport_reset_reconf_timer(transport); } |
3f7a87d2f [SCTP] sctp_conne... |
511 512 513 514 515 516 517 |
/* If we remove the transport an INIT was last sent to, set it to * NULL. Combined with the update of the retran path above, this * will cause the next INIT to be sent to the next available * transport, maintaining the cycle. */ if (asoc->init_last_sent_to == peer) asoc->init_last_sent_to = NULL; |
6345b1998 sctp: fix panic w... |
518 519 520 521 522 523 524 |
/* If we remove the transport an SHUTDOWN was last sent to, set it * to NULL. Combined with the update of the retran path above, this * will cause the next SHUTDOWN to be sent to the next available * transport, maintaining the cycle. */ if (asoc->shutdown_last_sent_to == peer) asoc->shutdown_last_sent_to = NULL; |
10a43cea7 sctp: fix panic w... |
525 526 527 528 529 530 |
/* If we remove the transport an ASCONF was last sent to, set it to * NULL. */ if (asoc->addip_last_asconf && asoc->addip_last_asconf->transport == peer) asoc->addip_last_asconf->transport = NULL; |
31b02e154 sctp: Failover tr... |
531 532 533 534 535 |
/* If we have something on the transmitted list, we have to * save it off. The best place is the active path. */ if (!list_empty(&peer->transmitted)) { struct sctp_transport *active = asoc->peer.active_path; |
31b02e154 sctp: Failover tr... |
536 537 538 539 540 541 542 543 544 545 546 547 548 |
/* Reset the transport of each chunk on this list */ list_for_each_entry(ch, &peer->transmitted, transmitted_list) { ch->transport = NULL; ch->rtt_in_progress = 0; } list_splice_tail_init(&peer->transmitted, &active->transmitted); /* Start a T3 timer here in case it wasn't running so * that these migrated packets have a chance to get |
2bccbadf2 sctp: fix some co... |
549 |
* retransmitted. |
31b02e154 sctp: Failover tr... |
550 551 552 553 554 555 |
*/ if (!timer_pending(&active->T3_rtx_timer)) if (!mod_timer(&active->T3_rtx_timer, jiffies + active->rto)) sctp_transport_hold(active); } |
8376fdc99 sctp: clear the t... |
556 557 558 |
list_for_each_entry(ch, &asoc->outqueue.out_chunk_list, list) if (ch->transport == peer) ch->transport = NULL; |
3f7a87d2f [SCTP] sctp_conne... |
559 560 561 562 |
asoc->peer.transport_count--; sctp_transport_free(peer); } |
1da177e4c Linux-2.6.12-rc2 |
563 564 565 |
/* Add a transport address to an association. */ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, const union sctp_addr *addr, |
dd0fc66fb [PATCH] gfp flags... |
566 |
const gfp_t gfp, |
3f7a87d2f [SCTP] sctp_conne... |
567 |
const int peer_state) |
1da177e4c Linux-2.6.12-rc2 |
568 |
{ |
89bf3450c sctp: Push struct... |
569 |
struct net *net = sock_net(asoc->base.sk); |
1da177e4c Linux-2.6.12-rc2 |
570 571 572 573 574 575 576 |
struct sctp_transport *peer; struct sctp_sock *sp; unsigned short port; sp = sctp_sk(asoc->base.sk); /* AF_INET and AF_INET6 share common port field. */ |
4bdf4b5fe [SCTP]: Switch sc... |
577 |
port = ntohs(addr->v4.sin_port); |
1da177e4c Linux-2.6.12-rc2 |
578 |
|
bb33381d0 net: sctp: rework... |
579 580 581 |
pr_debug("%s: association:%p addr:%pISpc state:%d ", __func__, asoc, &addr->sa, peer_state); |
3f7a87d2f [SCTP] sctp_conne... |
582 |
|
1da177e4c Linux-2.6.12-rc2 |
583 584 585 586 587 588 |
/* Set the port if it has not been set yet. */ if (0 == asoc->peer.port) asoc->peer.port = port; /* Check to see if this is a duplicate. */ peer = sctp_assoc_lookup_paddr(asoc, addr); |
3f7a87d2f [SCTP] sctp_conne... |
589 |
if (peer) { |
add52379d sctp: Fix oops wh... |
590 591 592 593 |
/* An UNKNOWN state is only set on transports added by * user in sctp_connectx() call. Such transports should be * considered CONFIRMED per RFC 4960, Section 5.4. */ |
ad8fec172 [SCTP]: Verify al... |
594 |
if (peer->state == SCTP_UNKNOWN) { |
add52379d sctp: Fix oops wh... |
595 |
peer->state = SCTP_ACTIVE; |
ad8fec172 [SCTP]: Verify al... |
596 |
} |
1da177e4c Linux-2.6.12-rc2 |
597 |
return peer; |
3f7a87d2f [SCTP] sctp_conne... |
598 |
} |
1da177e4c Linux-2.6.12-rc2 |
599 |
|
89bf3450c sctp: Push struct... |
600 |
peer = sctp_transport_new(net, addr, gfp); |
1da177e4c Linux-2.6.12-rc2 |
601 602 603 604 |
if (!peer) return NULL; sctp_transport_set_owner(peer, asoc); |
52ccb8e90 [SCTP]: Update SC... |
605 606 607 608 609 610 611 |
/* Initialize the peer's heartbeat interval based on the * association configured value. */ peer->hbinterval = asoc->hbinterval; /* Set the path max_retrans. */ peer->pathmaxrxt = asoc->pathmaxrxt; |
2bccbadf2 sctp: fix some co... |
612 |
/* And the partial failure retrans threshold */ |
5aa93bcf6 sctp: Implement q... |
613 |
peer->pf_retrans = asoc->pf_retrans; |
52ccb8e90 [SCTP]: Update SC... |
614 615 616 617 |
/* Initialize the peer's SACK delay timeout based on the * association configured value. */ peer->sackdelay = asoc->sackdelay; |
d364d9276 sctp: Bring SCTP_... |
618 |
peer->sackfreq = asoc->sackfreq; |
52ccb8e90 [SCTP]: Update SC... |
619 620 621 622 623 |
/* Enable/disable heartbeat, SACK delay, and path MTU discovery * based on association setting. */ peer->param_flags = asoc->param_flags; |
8da645e10 sctp: Get rid of ... |
624 |
sctp_transport_route(peer, NULL, sp); |
1da177e4c Linux-2.6.12-rc2 |
625 |
/* Initialize the pmtu of the transport. */ |
8da645e10 sctp: Get rid of ... |
626 627 628 629 630 631 |
if (peer->param_flags & SPP_PMTUD_DISABLE) { if (asoc->pathmtu) peer->pathmtu = asoc->pathmtu; else peer->pathmtu = SCTP_DEFAULT_MAXSEGMENT; } |
1da177e4c Linux-2.6.12-rc2 |
632 633 634 635 636 637 |
/* If this is the first transport addr on this association, * initialize the association PMTU to the peer's PMTU. * If not and the current association PMTU is higher than the new * peer's PMTU, reset the association PMTU to the new peer's PMTU. */ |
52ccb8e90 [SCTP]: Update SC... |
638 639 |
if (asoc->pathmtu) asoc->pathmtu = min_t(int, peer->pathmtu, asoc->pathmtu); |
1da177e4c Linux-2.6.12-rc2 |
640 |
else |
52ccb8e90 [SCTP]: Update SC... |
641 |
asoc->pathmtu = peer->pathmtu; |
1da177e4c Linux-2.6.12-rc2 |
642 |
|
bb33381d0 net: sctp: rework... |
643 644 645 |
pr_debug("%s: association:%p PMTU set to %d ", __func__, asoc, asoc->pathmtu); |
6d0ccbac6 sctp: Prevent uni... |
646 |
peer->pmtu_pending = 0; |
1da177e4c Linux-2.6.12-rc2 |
647 |
|
f68b2e05f sctp: Fix SCTP_MA... |
648 |
asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); |
1da177e4c Linux-2.6.12-rc2 |
649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 |
/* The asoc->peer.port might not be meaningful yet, but * initialize the packet structure anyway. */ sctp_packet_init(&peer->packet, peer, asoc->base.bind_addr.port, asoc->peer.port); /* 7.2.1 Slow-Start * * o The initial cwnd before DATA transmission or after a sufficiently * long idle period MUST be set to * min(4*MTU, max(2*MTU, 4380 bytes)) * * o The initial value of ssthresh MAY be arbitrarily high * (for example, implementations MAY use the size of the * receiver advertised window). */ |
52ccb8e90 [SCTP]: Update SC... |
666 |
peer->cwnd = min(4*asoc->pathmtu, max_t(__u32, 2*asoc->pathmtu, 4380)); |
1da177e4c Linux-2.6.12-rc2 |
667 668 669 670 671 672 673 674 675 |
/* At this point, we may not have the receiver's advertised window, * so initialize ssthresh to the default value and it will be set * later when we process the INIT. */ peer->ssthresh = SCTP_DEFAULT_MAXWINDOW; peer->partial_bytes_acked = 0; peer->flight_size = 0; |
46d5a8085 sctp: Update max.... |
676 |
peer->burst_limited = 0; |
1da177e4c Linux-2.6.12-rc2 |
677 |
|
1da177e4c Linux-2.6.12-rc2 |
678 679 |
/* Set the transport's RTO.initial value */ peer->rto = asoc->rto_initial; |
196d67593 sctp: Add support... |
680 |
sctp_max_rto(asoc, peer); |
1da177e4c Linux-2.6.12-rc2 |
681 |
|
3f7a87d2f [SCTP] sctp_conne... |
682 683 |
/* Set the peer's active state. */ peer->state = peer_state; |
7fda702f9 sctp: use new rhl... |
684 685 686 687 688 |
/* Add this peer into the transport hashtable */ if (sctp_hash_transport(peer)) { sctp_transport_free(peer); return NULL; } |
1da177e4c Linux-2.6.12-rc2 |
689 |
/* Attach the remote transport to our asoc. */ |
45122ca26 sctp: Add RCU pro... |
690 |
list_add_tail_rcu(&peer->transports, &asoc->peer.transport_addr_list); |
3f7a87d2f [SCTP] sctp_conne... |
691 |
asoc->peer.transport_count++; |
1da177e4c Linux-2.6.12-rc2 |
692 693 694 695 696 697 |
/* If we do not yet have a primary path, set one. */ if (!asoc->peer.primary_path) { sctp_assoc_set_primary(asoc, peer); asoc->peer.retran_path = peer; } |
fbdf501c9 sctp: Do no selec... |
698 699 |
if (asoc->peer.active_path == asoc->peer.retran_path && peer->state != SCTP_UNCONFIRMED) { |
1da177e4c Linux-2.6.12-rc2 |
700 |
asoc->peer.retran_path = peer; |
3f7a87d2f [SCTP] sctp_conne... |
701 |
} |
1da177e4c Linux-2.6.12-rc2 |
702 703 704 705 706 707 708 709 710 711 |
return peer; } /* Delete a transport address from an association. */ void sctp_assoc_del_peer(struct sctp_association *asoc, const union sctp_addr *addr) { struct list_head *pos; struct list_head *temp; |
1da177e4c Linux-2.6.12-rc2 |
712 713 714 715 716 |
struct sctp_transport *transport; list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) { transport = list_entry(pos, struct sctp_transport, transports); if (sctp_cmp_addr_exact(addr, &transport->ipaddr)) { |
3f7a87d2f [SCTP] sctp_conne... |
717 718 |
/* Do book keeping for removing the peer and free it. */ sctp_assoc_rm_peer(asoc, transport); |
1da177e4c Linux-2.6.12-rc2 |
719 720 721 |
break; } } |
1da177e4c Linux-2.6.12-rc2 |
722 723 724 725 726 727 728 729 |
} /* Lookup a transport by address. */ struct sctp_transport *sctp_assoc_lookup_paddr( const struct sctp_association *asoc, const union sctp_addr *address) { struct sctp_transport *t; |
1da177e4c Linux-2.6.12-rc2 |
730 731 |
/* Cycle through all transports searching for a peer address. */ |
9dbc15f05 [SCTP]: "list_for... |
732 733 |
list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) { |
1da177e4c Linux-2.6.12-rc2 |
734 735 736 737 738 739 |
if (sctp_cmp_addr_exact(address, &t->ipaddr)) return t; } return NULL; } |
42e30bf34 [SCTP]: Handle th... |
740 741 742 743 744 745 746 747 748 749 750 751 752 |
/* Remove all transports except a give one */ void sctp_assoc_del_nonprimary_peers(struct sctp_association *asoc, struct sctp_transport *primary) { struct sctp_transport *temp; struct sctp_transport *t; list_for_each_entry_safe(t, temp, &asoc->peer.transport_addr_list, transports) { /* if the current transport is not the primary one, delete it */ if (t != primary) sctp_assoc_rm_peer(asoc, t); } |
42e30bf34 [SCTP]: Handle th... |
753 |
} |
1da177e4c Linux-2.6.12-rc2 |
754 755 756 757 758 759 |
/* Engage in transport control operations. * Mark the transport up or down and send a notification to the user. * Select and update the new active and retran paths. */ void sctp_assoc_control_transport(struct sctp_association *asoc, struct sctp_transport *transport, |
0ceaeebe2 sctp: remove the ... |
760 |
enum sctp_transport_cmd command, |
1da177e4c Linux-2.6.12-rc2 |
761 762 |
sctp_sn_error_t error) { |
1da177e4c Linux-2.6.12-rc2 |
763 |
struct sctp_ulpevent *event; |
0906e20fa [SCTP] bug: sctp_... |
764 |
struct sockaddr_storage addr; |
1da177e4c Linux-2.6.12-rc2 |
765 |
int spc_state = 0; |
5aa93bcf6 sctp: Implement q... |
766 |
bool ulp_notify = true; |
1da177e4c Linux-2.6.12-rc2 |
767 768 769 770 |
/* Record the transition on the transport. */ switch (command) { case SCTP_TRANSPORT_UP: |
1ae4114dc [SCTP]: Implement... |
771 772 773 774 775 776 777 778 779 |
/* If we are moving from UNCONFIRMED state due * to heartbeat success, report the SCTP_ADDR_CONFIRMED * state to the user, otherwise report SCTP_ADDR_AVAILABLE. */ if (SCTP_UNCONFIRMED == transport->state && SCTP_HEARTBEAT_SUCCESS == error) spc_state = SCTP_ADDR_CONFIRMED; else spc_state = SCTP_ADDR_AVAILABLE; |
5aa93bcf6 sctp: Implement q... |
780 |
/* Don't inform ULP about transition from PF to |
ac4f95993 net: sctp: sctp_a... |
781 |
* active state and set cwnd to 1 MTU, see SCTP |
5aa93bcf6 sctp: Implement q... |
782 783 784 785 |
* Quick failover draft section 5.1, point 5 */ if (transport->state == SCTP_PF) { ulp_notify = false; |
ac4f95993 net: sctp: sctp_a... |
786 |
transport->cwnd = asoc->pathmtu; |
5aa93bcf6 sctp: Implement q... |
787 |
} |
3f7a87d2f [SCTP] sctp_conne... |
788 |
transport->state = SCTP_ACTIVE; |
1da177e4c Linux-2.6.12-rc2 |
789 790 791 |
break; case SCTP_TRANSPORT_DOWN: |
40187886b sctp: release cac... |
792 793 794 |
/* If the transport was never confirmed, do not transition it * to inactive state. Also, release the cached route since * there may be a better route next time. |
cc75689a4 SCTP: Uncomfirmed... |
795 796 797 |
*/ if (transport->state != SCTP_UNCONFIRMED) transport->state = SCTP_INACTIVE; |
40187886b sctp: release cac... |
798 |
else { |
c86a773c7 sctp: add dst_pen... |
799 |
sctp_transport_dst_release(transport); |
061079ac0 sctp: not send SC... |
800 |
ulp_notify = false; |
40187886b sctp: release cac... |
801 |
} |
cc75689a4 SCTP: Uncomfirmed... |
802 |
|
1da177e4c Linux-2.6.12-rc2 |
803 804 |
spc_state = SCTP_ADDR_UNREACHABLE; break; |
5aa93bcf6 sctp: Implement q... |
805 806 807 808 |
case SCTP_TRANSPORT_PF: transport->state = SCTP_PF; ulp_notify = false; break; |
1da177e4c Linux-2.6.12-rc2 |
809 810 |
default: return; |
3ff50b799 [NET]: cleanup ex... |
811 |
} |
1da177e4c Linux-2.6.12-rc2 |
812 |
|
b82e8f31a net: sctp: refact... |
813 814 |
/* Generate and send a SCTP_PEER_ADDR_CHANGE notification * to the user. |
1da177e4c Linux-2.6.12-rc2 |
815 |
*/ |
5aa93bcf6 sctp: Implement q... |
816 817 818 819 |
if (ulp_notify) { memset(&addr, 0, sizeof(struct sockaddr_storage)); memcpy(&addr, &transport->ipaddr, transport->af_specific->sockaddr_len); |
b82e8f31a net: sctp: refact... |
820 |
|
5aa93bcf6 sctp: Implement q... |
821 822 823 824 825 |
event = sctp_ulpevent_make_peer_addr_change(asoc, &addr, 0, spc_state, error, GFP_ATOMIC); if (event) sctp_ulpq_tail_event(&asoc->ulpq, event); } |
1da177e4c Linux-2.6.12-rc2 |
826 827 |
/* Select new active and retran paths. */ |
b82e8f31a net: sctp: refact... |
828 |
sctp_select_active_and_retran_path(asoc); |
1da177e4c Linux-2.6.12-rc2 |
829 830 831 832 833 |
} /* Hold a reference to an association. */ void sctp_association_hold(struct sctp_association *asoc) { |
c638457a7 net, sctp: conver... |
834 |
refcount_inc(&asoc->base.refcnt); |
1da177e4c Linux-2.6.12-rc2 |
835 836 837 838 839 840 841 |
} /* Release a reference to an association and cleanup * if there are no more references. */ void sctp_association_put(struct sctp_association *asoc) { |
c638457a7 net, sctp: conver... |
842 |
if (refcount_dec_and_test(&asoc->base.refcnt)) |
1da177e4c Linux-2.6.12-rc2 |
843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 |
sctp_association_destroy(asoc); } /* Allocate the next TSN, Transmission Sequence Number, for the given * association. */ __u32 sctp_association_get_next_tsn(struct sctp_association *asoc) { /* From Section 1.6 Serial Number Arithmetic: * Transmission Sequence Numbers wrap around when they reach * 2**32 - 1. That is, the next TSN a DATA chunk MUST use * after transmitting TSN = 2*32 - 1 is TSN = 0. */ __u32 retval = asoc->next_tsn; asoc->next_tsn++; asoc->unack_data++; return retval; } /* Compare two addresses to see if they match. Wildcard addresses * only match themselves. */ int sctp_cmp_addr_exact(const union sctp_addr *ss1, const union sctp_addr *ss2) { struct sctp_af *af; af = sctp_get_af_specific(ss1->sa.sa_family); if (unlikely(!af)) return 0; return af->cmp_addr(ss1, ss2); } /* Return an ecne chunk to get prepended to a packet. * Note: We are sly and return a shared, prealloced chunk. FIXME: * No we don't, but we could/should. */ struct sctp_chunk *sctp_get_ecne_prepend(struct sctp_association *asoc) { |
8b7318d3e sctp: remove the ... |
884 885 |
if (!asoc->need_ecne) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
886 887 888 889 |
/* Send ECNE if needed. * Not being able to allocate a chunk here is not deadly. */ |
8b7318d3e sctp: remove the ... |
890 |
return sctp_make_ecne(asoc, asoc->last_ecne_tsn); |
1da177e4c Linux-2.6.12-rc2 |
891 892 893 894 895 896 897 898 899 900 |
} /* * Find which transport this TSN was sent on. */ struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *asoc, __u32 tsn) { struct sctp_transport *active; struct sctp_transport *match; |
1da177e4c Linux-2.6.12-rc2 |
901 902 |
struct sctp_transport *transport; struct sctp_chunk *chunk; |
dbc16db1e [SCTP]: Trivial s... |
903 |
__be32 key = htonl(tsn); |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 |
match = NULL; /* * FIXME: In general, find a more efficient data structure for * searching. */ /* * The general strategy is to search each transport's transmitted * list. Return which transport this TSN lives on. * * Let's be hopeful and check the active_path first. * Another optimization would be to know if there is only one * outbound path and not have to look for the TSN at all. * */ active = asoc->peer.active_path; |
9dbc15f05 [SCTP]: "list_for... |
923 924 |
list_for_each_entry(chunk, &active->transmitted, transmitted_list) { |
1da177e4c Linux-2.6.12-rc2 |
925 926 927 928 929 930 931 932 |
if (key == chunk->subh.data_hdr->tsn) { match = active; goto out; } } /* If not found, go search all the other transports. */ |
9dbc15f05 [SCTP]: "list_for... |
933 934 |
list_for_each_entry(transport, &asoc->peer.transport_addr_list, transports) { |
1da177e4c Linux-2.6.12-rc2 |
935 936 |
if (transport == active) |
2317f449a sctp: don't break... |
937 |
continue; |
9dbc15f05 [SCTP]: "list_for... |
938 939 |
list_for_each_entry(chunk, &transport->transmitted, transmitted_list) { |
1da177e4c Linux-2.6.12-rc2 |
940 941 942 943 944 945 946 947 948 949 950 951 |
if (key == chunk->subh.data_hdr->tsn) { match = transport; goto out; } } } out: return match; } /* Is this the association we are looking for? */ struct sctp_transport *sctp_assoc_is_match(struct sctp_association *asoc, |
4110cc255 sctp: Make the as... |
952 |
struct net *net, |
1da177e4c Linux-2.6.12-rc2 |
953 954 955 956 |
const union sctp_addr *laddr, const union sctp_addr *paddr) { struct sctp_transport *transport; |
e2fccedb0 [SCTP]: Switch sc... |
957 |
if ((htons(asoc->base.bind_addr.port) == laddr->v4.sin_port) && |
4110cc255 sctp: Make the as... |
958 959 |
(htons(asoc->peer.port) == paddr->v4.sin_port) && net_eq(sock_net(asoc->base.sk), net)) { |
1da177e4c Linux-2.6.12-rc2 |
960 961 962 963 964 965 966 967 968 969 970 |
transport = sctp_assoc_lookup_paddr(asoc, paddr); if (!transport) goto out; if (sctp_bind_addr_match(&asoc->base.bind_addr, laddr, sctp_sk(asoc->base.sk))) goto out; } transport = NULL; out: |
1da177e4c Linux-2.6.12-rc2 |
971 972 973 974 |
return transport; } /* Do delayed input processing. This is scheduled by sctp_rcv(). */ |
c4028958b WorkStruct: make ... |
975 |
static void sctp_assoc_bh_rcv(struct work_struct *work) |
1da177e4c Linux-2.6.12-rc2 |
976 |
{ |
c4028958b WorkStruct: make ... |
977 978 979 |
struct sctp_association *asoc = container_of(work, struct sctp_association, base.inqueue.immediate); |
55e26eb95 sctp: Push struct... |
980 |
struct net *net = sock_net(asoc->base.sk); |
bfc6f8270 sctp: remove the ... |
981 |
union sctp_subtype subtype; |
1da177e4c Linux-2.6.12-rc2 |
982 983 |
struct sctp_endpoint *ep; struct sctp_chunk *chunk; |
1da177e4c Linux-2.6.12-rc2 |
984 |
struct sctp_inq *inqueue; |
3b54f1fd8 sctp: delay the a... |
985 |
int first_time = 1; /* is this the first time through the loop */ |
1da177e4c Linux-2.6.12-rc2 |
986 |
int error = 0; |
3b54f1fd8 sctp: delay the a... |
987 |
int state; |
1da177e4c Linux-2.6.12-rc2 |
988 989 990 |
/* The association should be held so we should be safe. */ ep = asoc->ep; |
1da177e4c Linux-2.6.12-rc2 |
991 992 993 994 995 996 |
inqueue = &asoc->base.inqueue; sctp_association_hold(asoc); while (NULL != (chunk = sctp_inq_pop(inqueue))) { state = asoc->state; subtype = SCTP_ST_CHUNK(chunk->chunk_hdr->type); |
3b54f1fd8 sctp: delay the a... |
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 |
/* If the first chunk in the packet is AUTH, do special * processing specified in Section 6.3 of SCTP-AUTH spec */ if (first_time && subtype.chunk == SCTP_CID_AUTH) { struct sctp_chunkhdr *next_hdr; next_hdr = sctp_inq_peek(inqueue); if (!next_hdr) goto normal; /* If the next chunk is COOKIE-ECHO, skip the AUTH * chunk while saving a pointer to it so we can do * Authentication later (during cookie-echo * processing). */ if (next_hdr->type == SCTP_CID_COOKIE_ECHO) { chunk->auth_chunk = skb_clone(chunk->skb, GFP_ATOMIC); chunk->auth = 1; continue; } } normal: |
bbd0d5980 [SCTP]: Implement... |
1021 1022 1023 1024 1025 1026 1027 1028 1029 |
/* SCTP-AUTH, Section 6.3: * The receiver has a list of chunk types which it expects * to be received only after an AUTH-chunk. This list has * been sent to the peer during the association setup. It * MUST silently discard these chunks if they are not placed * after an AUTH chunk in the packet. */ if (sctp_auth_recv_cid(subtype.chunk, asoc) && !chunk->auth) continue; |
1da177e4c Linux-2.6.12-rc2 |
1030 1031 1032 1033 1034 |
/* Remember where the last DATA chunk came from so we * know where to send the SACK. */ if (sctp_chunk_is_data(chunk)) asoc->peer.last_data_from = chunk->transport; |
196d67593 sctp: Add support... |
1035 |
else { |
55e26eb95 sctp: Push struct... |
1036 |
SCTP_INC_STATS(net, SCTP_MIB_INCTRLCHUNKS); |
196d67593 sctp: Add support... |
1037 1038 1039 1040 |
asoc->stats.ictrlchunks++; if (chunk->chunk_hdr->type == SCTP_CID_SACK) asoc->stats.isacks++; } |
1da177e4c Linux-2.6.12-rc2 |
1041 1042 |
if (chunk->transport) |
e575235fc net: sctp: migrat... |
1043 |
chunk->transport->last_time_heard = ktime_get(); |
1da177e4c Linux-2.6.12-rc2 |
1044 1045 |
/* Run through the state machine. */ |
55e26eb95 sctp: Push struct... |
1046 |
error = sctp_do_sm(net, SCTP_EVENT_T_CHUNK, subtype, |
1da177e4c Linux-2.6.12-rc2 |
1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 |
state, ep, asoc, chunk, GFP_ATOMIC); /* Check to see if the association is freed in response to * the incoming chunk. If so, get out of the while loop. */ if (asoc->base.dead) break; /* If there is an error on chunk, discard this packet. */ if (error && chunk) chunk->pdiscard = 1; |
3b54f1fd8 sctp: delay the a... |
1058 1059 1060 |
if (first_time) first_time = 0; |
1da177e4c Linux-2.6.12-rc2 |
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 |
} sctp_association_put(asoc); } /* This routine moves an association from its old sk to a new sk. */ void sctp_assoc_migrate(struct sctp_association *assoc, struct sock *newsk) { struct sctp_sock *newsp = sctp_sk(newsk); struct sock *oldsk = assoc->base.sk; /* Delete the association from the old endpoint's list of * associations. */ list_del_init(&assoc->asocs); /* Decrement the backlog value for a TCP-style socket. */ if (sctp_style(oldsk, TCP)) oldsk->sk_ack_backlog--; /* Release references to the old endpoint and the sock. */ sctp_endpoint_put(assoc->ep); sock_put(assoc->base.sk); /* Get a reference to the new endpoint. */ assoc->ep = newsp->ep; sctp_endpoint_hold(assoc->ep); /* Get a reference to the new sock. */ assoc->base.sk = newsk; sock_hold(assoc->base.sk); /* Add the association to the new endpoint's list of associations. */ sctp_endpoint_add_asoc(newsp->ep, assoc); } /* Update an association (possibly from unexpected COOKIE-ECHO processing). */ |
5ee8aa689 sctp: handle erro... |
1097 1098 |
int sctp_assoc_update(struct sctp_association *asoc, struct sctp_association *new) |
1da177e4c Linux-2.6.12-rc2 |
1099 1100 1101 1102 1103 1104 1105 1106 |
{ struct sctp_transport *trans; struct list_head *pos, *temp; /* Copy in new parameters of peer. */ asoc->c = new->c; asoc->peer.rwnd = new->peer.rwnd; asoc->peer.sack_needed = new->peer.sack_needed; |
1be9a950c net: sctp: inheri... |
1107 |
asoc->peer.auth_capable = new->peer.auth_capable; |
1da177e4c Linux-2.6.12-rc2 |
1108 |
asoc->peer.i = new->peer.i; |
5ee8aa689 sctp: handle erro... |
1109 1110 1111 1112 |
if (!sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_INITIAL, asoc->peer.i.initial_tsn, GFP_ATOMIC)) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1113 1114 1115 1116 |
/* Remove any peer addresses not present in the new association. */ list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) { trans = list_entry(pos, struct sctp_transport, transports); |
0c42749cf sctp: fix potenti... |
1117 1118 1119 1120 |
if (!sctp_assoc_lookup_paddr(new, &trans->ipaddr)) { sctp_assoc_rm_peer(asoc, trans); continue; } |
749bf9215 [SCTP]: Reset som... |
1121 1122 1123 |
if (asoc->state >= SCTP_STATE_ESTABLISHED) sctp_transport_reset(trans); |
1da177e4c Linux-2.6.12-rc2 |
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 |
} /* If the case is A (association restart), use * initial_tsn as next_tsn. If the case is B, use * current next_tsn in case data sent to peer * has been discarded and needs retransmission. */ if (asoc->state >= SCTP_STATE_ESTABLISHED) { asoc->next_tsn = new->next_tsn; asoc->ctsn_ack_point = new->ctsn_ack_point; asoc->adv_peer_ack_point = new->adv_peer_ack_point; /* Reinitialize SSN for both local streams * and peer's streams. */ |
cee360ab4 sctp: define the ... |
1139 |
sctp_stream_clear(&asoc->stream); |
1da177e4c Linux-2.6.12-rc2 |
1140 |
|
0b58a8114 [SCTP]: Clean up ... |
1141 1142 1143 1144 1145 |
/* Flush the ULP reassembly and ordered queue. * Any data there will now be stale and will * cause problems. */ sctp_ulpq_flush(&asoc->ulpq); |
749bf9215 [SCTP]: Reset som... |
1146 1147 1148 1149 1150 |
/* reset the overall association error count so * that the restarted association doesn't get torn * down on the next retransmission timer. */ asoc->overall_error_count = 0; |
1da177e4c Linux-2.6.12-rc2 |
1151 1152 |
} else { /* Add any peer addresses from the new association. */ |
9dbc15f05 [SCTP]: "list_for... |
1153 |
list_for_each_entry(trans, &new->peer.transport_addr_list, |
5ee8aa689 sctp: handle erro... |
1154 1155 1156 1157 1158 |
transports) if (!sctp_assoc_lookup_paddr(asoc, &trans->ipaddr) && !sctp_assoc_add_peer(asoc, &trans->ipaddr, GFP_ATOMIC, trans->state)) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1159 1160 1161 |
asoc->ctsn_ack_point = asoc->next_tsn - 1; asoc->adv_peer_ack_point = asoc->ctsn_ack_point; |
3ab213791 sctp: fix stream ... |
1162 |
|
cee360ab4 sctp: define the ... |
1163 1164 |
if (sctp_state(asoc, COOKIE_WAIT)) sctp_stream_update(&asoc->stream, &new->stream); |
07d939677 [SCTP]: Set assoc... |
1165 |
|
4abf5a653 sctp: no need to ... |
1166 |
/* get a new assoc id if we don't have one yet. */ |
5ee8aa689 sctp: handle erro... |
1167 1168 |
if (sctp_assoc_set_id(asoc, GFP_ATOMIC)) return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1169 |
} |
a29a5bd4f [SCTP]: Implement... |
1170 |
|
9d2c881af sctp: fix some co... |
1171 |
/* SCTP-AUTH: Save the peer parameters from the new associations |
730fc3d05 [SCTP]: Implete S... |
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 |
* and also move the association shared keys over */ kfree(asoc->peer.peer_random); asoc->peer.peer_random = new->peer.peer_random; new->peer.peer_random = NULL; kfree(asoc->peer.peer_chunks); asoc->peer.peer_chunks = new->peer.peer_chunks; new->peer.peer_chunks = NULL; kfree(asoc->peer.peer_hmacs); asoc->peer.peer_hmacs = new->peer.peer_hmacs; new->peer.peer_hmacs = NULL; |
5ee8aa689 sctp: handle erro... |
1185 |
return sctp_auth_asoc_init_active_key(asoc, GFP_ATOMIC); |
1da177e4c Linux-2.6.12-rc2 |
1186 1187 1188 |
} /* Update the retran path for sending a retransmitted packet. |
4c47af4d5 net: sctp: rework... |
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 |
* See also RFC4960, 6.4. Multi-Homed SCTP Endpoints: * * When there is outbound data to send and the primary path * becomes inactive (e.g., due to failures), or where the * SCTP user explicitly requests to send data to an * inactive destination transport address, before reporting * an error to its ULP, the SCTP endpoint should try to send * the data to an alternate active destination transport * address if one exists. * * When retransmitting data that timed out, if the endpoint * is multihomed, it should consider each source-destination * address pair in its retransmission selection policy. * When retransmitting timed-out data, the endpoint should * attempt to pick the most divergent source-destination * pair from the original source-destination pair to which * the packet was transmitted. * * Note: Rules for picking the most divergent source-destination * pair are an implementation decision and are not specified * within this document. * * Our basic strategy is to round-robin transports in priorities |
2103d6b81 net: sctp: Don't ... |
1212 |
* according to sctp_trans_score() e.g., if no such |
4c47af4d5 net: sctp: rework... |
1213 1214 |
* transport with state SCTP_ACTIVE exists, round-robin through * SCTP_UNKNOWN, etc. You get the picture. |
1da177e4c Linux-2.6.12-rc2 |
1215 |
*/ |
4c47af4d5 net: sctp: rework... |
1216 |
static u8 sctp_trans_score(const struct sctp_transport *trans) |
1da177e4c Linux-2.6.12-rc2 |
1217 |
{ |
2103d6b81 net: sctp: Don't ... |
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 |
switch (trans->state) { case SCTP_ACTIVE: return 3; /* best case */ case SCTP_UNKNOWN: return 2; case SCTP_PF: return 1; default: /* case SCTP_INACTIVE */ return 0; /* worst case */ } |
4c47af4d5 net: sctp: rework... |
1228 |
} |
1da177e4c Linux-2.6.12-rc2 |
1229 |
|
a7288c4dd net: sctp: improv... |
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 |
static struct sctp_transport *sctp_trans_elect_tie(struct sctp_transport *trans1, struct sctp_transport *trans2) { if (trans1->error_count > trans2->error_count) { return trans2; } else if (trans1->error_count == trans2->error_count && ktime_after(trans2->last_time_heard, trans1->last_time_heard)) { return trans2; } else { return trans1; } } |
4c47af4d5 net: sctp: rework... |
1243 1244 1245 |
static struct sctp_transport *sctp_trans_elect_best(struct sctp_transport *curr, struct sctp_transport *best) { |
a7288c4dd net: sctp: improv... |
1246 |
u8 score_curr, score_best; |
ea4f19c1f net: sctp: spare ... |
1247 |
if (best == NULL || curr == best) |
4c47af4d5 net: sctp: rework... |
1248 |
return curr; |
4141ddc02 sctp: retran_path... |
1249 |
|
a7288c4dd net: sctp: improv... |
1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 |
score_curr = sctp_trans_score(curr); score_best = sctp_trans_score(best); /* First, try a score-based selection if both transport states * differ. If we're in a tie, lets try to make a more clever * decision here based on error counts and last time heard. */ if (score_curr > score_best) return curr; else if (score_curr == score_best) |
39d2adebf sctp: fix the tra... |
1260 |
return sctp_trans_elect_tie(best, curr); |
a7288c4dd net: sctp: improv... |
1261 1262 |
else return best; |
4c47af4d5 net: sctp: rework... |
1263 |
} |
1da177e4c Linux-2.6.12-rc2 |
1264 |
|
4c47af4d5 net: sctp: rework... |
1265 1266 1267 1268 |
void sctp_assoc_update_retran_path(struct sctp_association *asoc) { struct sctp_transport *trans = asoc->peer.retran_path; struct sctp_transport *trans_next = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1269 |
|
4c47af4d5 net: sctp: rework... |
1270 1271 1272 1273 1274 1275 1276 1277 1278 |
/* We're done as we only have the one and only path. */ if (asoc->peer.transport_count == 1) return; /* If active_path and retran_path are the same and active, * then this is the only active path. Use it. */ if (asoc->peer.active_path == asoc->peer.retran_path && asoc->peer.active_path->state == SCTP_ACTIVE) return; |
1da177e4c Linux-2.6.12-rc2 |
1279 |
|
4c47af4d5 net: sctp: rework... |
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 |
/* Iterate from retran_path's successor back to retran_path. */ for (trans = list_next_entry(trans, transports); 1; trans = list_next_entry(trans, transports)) { /* Manually skip the head element. */ if (&trans->transports == &asoc->peer.transport_addr_list) continue; if (trans->state == SCTP_UNCONFIRMED) continue; trans_next = sctp_trans_elect_best(trans, trans_next); /* Active is good enough for immediate return. */ if (trans_next->state == SCTP_ACTIVE) |
4141ddc02 sctp: retran_path... |
1291 |
break; |
4c47af4d5 net: sctp: rework... |
1292 1293 |
/* We've reached the end, time to update path. */ if (trans == asoc->peer.retran_path) |
1da177e4c Linux-2.6.12-rc2 |
1294 |
break; |
1da177e4c Linux-2.6.12-rc2 |
1295 |
} |
433131ba0 net: sctp: remove... |
1296 |
asoc->peer.retran_path = trans_next; |
3f7a87d2f [SCTP] sctp_conne... |
1297 |
|
4c47af4d5 net: sctp: rework... |
1298 1299 1300 |
pr_debug("%s: association:%p updated new path to addr:%pISpc ", __func__, asoc, &asoc->peer.retran_path->ipaddr.sa); |
3f7a87d2f [SCTP] sctp_conne... |
1301 |
} |
b82e8f31a net: sctp: refact... |
1302 1303 1304 |
static void sctp_select_active_and_retran_path(struct sctp_association *asoc) { struct sctp_transport *trans, *trans_pri = NULL, *trans_sec = NULL; |
a7288c4dd net: sctp: improv... |
1305 |
struct sctp_transport *trans_pf = NULL; |
b82e8f31a net: sctp: refact... |
1306 1307 1308 1309 |
/* Look for the two most recently used active transports. */ list_for_each_entry(trans, &asoc->peer.transport_addr_list, transports) { |
a7288c4dd net: sctp: improv... |
1310 |
/* Skip uninteresting transports. */ |
b82e8f31a net: sctp: refact... |
1311 |
if (trans->state == SCTP_INACTIVE || |
a7288c4dd net: sctp: improv... |
1312 |
trans->state == SCTP_UNCONFIRMED) |
b82e8f31a net: sctp: refact... |
1313 |
continue; |
a7288c4dd net: sctp: improv... |
1314 1315 1316 1317 1318 1319 1320 1321 |
/* Keep track of the best PF transport from our * list in case we don't find an active one. */ if (trans->state == SCTP_PF) { trans_pf = sctp_trans_elect_best(trans, trans_pf); continue; } /* For active transports, pick the most recent ones. */ |
b82e8f31a net: sctp: refact... |
1322 |
if (trans_pri == NULL || |
e575235fc net: sctp: migrat... |
1323 1324 |
ktime_after(trans->last_time_heard, trans_pri->last_time_heard)) { |
b82e8f31a net: sctp: refact... |
1325 1326 1327 |
trans_sec = trans_pri; trans_pri = trans; } else if (trans_sec == NULL || |
e575235fc net: sctp: migrat... |
1328 1329 |
ktime_after(trans->last_time_heard, trans_sec->last_time_heard)) { |
b82e8f31a net: sctp: refact... |
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 |
trans_sec = trans; } } /* RFC 2960 6.4 Multi-Homed SCTP Endpoints * * By default, an endpoint should always transmit to the primary * path, unless the SCTP user explicitly specifies the * destination transport address (and possibly source transport * address) to use. [If the primary is active but not most recent, * bump the most recently used transport.] */ if ((asoc->peer.primary_path->state == SCTP_ACTIVE || asoc->peer.primary_path->state == SCTP_UNKNOWN) && asoc->peer.primary_path != trans_pri) { trans_sec = trans_pri; trans_pri = asoc->peer.primary_path; } /* We did not find anything useful for a possible retransmission * path; either primary path that we found is the the same as * the current one, or we didn't generally find an active one. */ if (trans_sec == NULL) trans_sec = trans_pri; /* If we failed to find a usable transport, just camp on the |
aa4a83ee8 net: sctp: fix su... |
1357 |
* active or pick a PF iff it's the better choice. |
b82e8f31a net: sctp: refact... |
1358 1359 |
*/ if (trans_pri == NULL) { |
aa4a83ee8 net: sctp: fix su... |
1360 1361 |
trans_pri = sctp_trans_elect_best(asoc->peer.active_path, trans_pf); trans_sec = trans_pri; |
b82e8f31a net: sctp: refact... |
1362 1363 1364 1365 1366 1367 |
} /* Set the active and retran transports. */ asoc->peer.active_path = trans_pri; asoc->peer.retran_path = trans_sec; } |
4c47af4d5 net: sctp: rework... |
1368 1369 1370 |
struct sctp_transport * sctp_assoc_choose_alter_transport(struct sctp_association *asoc, struct sctp_transport *last_sent_to) |
3f7a87d2f [SCTP] sctp_conne... |
1371 |
{ |
9919b455f sctp: fix to choo... |
1372 1373 |
/* If this is the first time packet is sent, use the active path, * else use the retran path. If the last packet was sent over the |
3f7a87d2f [SCTP] sctp_conne... |
1374 1375 |
* retran path, update the retran path and use it. */ |
4c47af4d5 net: sctp: rework... |
1376 |
if (last_sent_to == NULL) { |
1da177e4c Linux-2.6.12-rc2 |
1377 |
return asoc->peer.active_path; |
4c47af4d5 net: sctp: rework... |
1378 |
} else { |
9919b455f sctp: fix to choo... |
1379 |
if (last_sent_to == asoc->peer.retran_path) |
1da177e4c Linux-2.6.12-rc2 |
1380 |
sctp_assoc_update_retran_path(asoc); |
4c47af4d5 net: sctp: rework... |
1381 |
|
1da177e4c Linux-2.6.12-rc2 |
1382 1383 |
return asoc->peer.retran_path; } |
1da177e4c Linux-2.6.12-rc2 |
1384 1385 1386 1387 1388 |
} /* Update the association's pmtu and frag_point by going through all the * transports. This routine is called when a transport's PMTU has changed. */ |
3ebfdf082 sctp: get sock fr... |
1389 |
void sctp_assoc_sync_pmtu(struct sctp_association *asoc) |
1da177e4c Linux-2.6.12-rc2 |
1390 1391 |
{ struct sctp_transport *t; |
1da177e4c Linux-2.6.12-rc2 |
1392 1393 1394 1395 1396 1397 |
__u32 pmtu = 0; if (!asoc) return; /* Get the lowest pmtu of all the transports. */ |
9dbc15f05 [SCTP]: "list_for... |
1398 1399 |
list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) { |
8a4794914 [SCTP] Flag a pmt... |
1400 |
if (t->pmtu_pending && t->dst) { |
3ebfdf082 sctp: get sock fr... |
1401 1402 |
sctp_transport_update_pmtu( t, SCTP_TRUNC4(dst_mtu(t->dst))); |
8a4794914 [SCTP] Flag a pmt... |
1403 1404 |
t->pmtu_pending = 0; } |
52ccb8e90 [SCTP]: Update SC... |
1405 1406 |
if (!pmtu || (t->pathmtu < pmtu)) pmtu = t->pathmtu; |
1da177e4c Linux-2.6.12-rc2 |
1407 1408 1409 |
} if (pmtu) { |
52ccb8e90 [SCTP]: Update SC... |
1410 |
asoc->pathmtu = pmtu; |
f68b2e05f sctp: Fix SCTP_MA... |
1411 |
asoc->frag_point = sctp_frag_point(asoc, pmtu); |
1da177e4c Linux-2.6.12-rc2 |
1412 |
} |
bb33381d0 net: sctp: rework... |
1413 1414 1415 |
pr_debug("%s: asoc:%p, pmtu:%d, frag_point:%d ", __func__, asoc, asoc->pathmtu, asoc->frag_point); |
1da177e4c Linux-2.6.12-rc2 |
1416 1417 1418 |
} /* Should we send a SACK to update our peer? */ |
ce4a03db9 sctp: convert sct... |
1419 |
static inline bool sctp_peer_needs_update(struct sctp_association *asoc) |
1da177e4c Linux-2.6.12-rc2 |
1420 |
{ |
e1fc3b14f sctp: Make sysctl... |
1421 |
struct net *net = sock_net(asoc->base.sk); |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 1424 1425 1426 1427 |
switch (asoc->state) { case SCTP_STATE_ESTABLISHED: case SCTP_STATE_SHUTDOWN_PENDING: case SCTP_STATE_SHUTDOWN_RECEIVED: case SCTP_STATE_SHUTDOWN_SENT: if ((asoc->rwnd > asoc->a_rwnd) && |
90f2f5318 sctp: Update SWS ... |
1428 |
((asoc->rwnd - asoc->a_rwnd) >= max_t(__u32, |
e1fc3b14f sctp: Make sysctl... |
1429 |
(asoc->base.sk->sk_rcvbuf >> net->sctp.rwnd_upd_shift), |
90f2f5318 sctp: Update SWS ... |
1430 |
asoc->pathmtu))) |
ce4a03db9 sctp: convert sct... |
1431 |
return true; |
1da177e4c Linux-2.6.12-rc2 |
1432 1433 1434 1435 |
break; default: break; } |
ce4a03db9 sctp: convert sct... |
1436 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
1437 |
} |
362d52040 Revert "net: sctp... |
1438 1439 |
/* Increase asoc's rwnd by len and send any window update SACK if needed. */ void sctp_assoc_rwnd_increase(struct sctp_association *asoc, unsigned int len) |
1da177e4c Linux-2.6.12-rc2 |
1440 1441 1442 |
{ struct sctp_chunk *sack; struct timer_list *timer; |
362d52040 Revert "net: sctp... |
1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 |
if (asoc->rwnd_over) { if (asoc->rwnd_over >= len) { asoc->rwnd_over -= len; } else { asoc->rwnd += (len - asoc->rwnd_over); asoc->rwnd_over = 0; } } else { asoc->rwnd += len; } |
1da177e4c Linux-2.6.12-rc2 |
1453 |
|
362d52040 Revert "net: sctp... |
1454 1455 1456 1457 1458 |
/* If we had window pressure, start recovering it * once our rwnd had reached the accumulated pressure * threshold. The idea is to recover slowly, but up * to the initial advertised window. */ |
1636098c4 sctp: fix recover... |
1459 |
if (asoc->rwnd_press) { |
362d52040 Revert "net: sctp... |
1460 1461 1462 1463 |
int change = min(asoc->pathmtu, asoc->rwnd_press); asoc->rwnd += change; asoc->rwnd_press -= change; } |
4d3c46e68 sctp: drop a_rwnd... |
1464 |
|
362d52040 Revert "net: sctp... |
1465 1466 1467 1468 |
pr_debug("%s: asoc:%p rwnd increased by %d to (%u, %u) - %u ", __func__, asoc, len, asoc->rwnd, asoc->rwnd_over, asoc->a_rwnd); |
1da177e4c Linux-2.6.12-rc2 |
1469 1470 1471 1472 1473 1474 |
/* Send a window update SACK if the rwnd has increased by at least the * minimum of the association's PMTU and half of the receive buffer. * The algorithm used is similar to the one described in * Section 4.2.3.3 of RFC 1122. */ |
362d52040 Revert "net: sctp... |
1475 |
if (sctp_peer_needs_update(asoc)) { |
1da177e4c Linux-2.6.12-rc2 |
1476 |
asoc->a_rwnd = asoc->rwnd; |
bb33381d0 net: sctp: rework... |
1477 1478 1479 1480 1481 |
pr_debug("%s: sending window update SACK- asoc:%p rwnd:%u " "a_rwnd:%u ", __func__, asoc, asoc->rwnd, asoc->a_rwnd); |
1da177e4c Linux-2.6.12-rc2 |
1482 1483 1484 1485 1486 |
sack = sctp_make_sack(asoc); if (!sack) return; asoc->peer.sack_needed = 0; |
cea8768f3 sctp: allow sctp_... |
1487 |
sctp_outq_tail(&asoc->outqueue, sack, GFP_ATOMIC); |
1da177e4c Linux-2.6.12-rc2 |
1488 1489 1490 |
/* Stop the SACK timer. */ timer = &asoc->timers[SCTP_EVENT_TIMEOUT_SACK]; |
25cc4ae91 net: remove redun... |
1491 |
if (del_timer(timer)) |
1da177e4c Linux-2.6.12-rc2 |
1492 1493 1494 |
sctp_association_put(asoc); } } |
362d52040 Revert "net: sctp... |
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 |
/* Decrease asoc's rwnd by len. */ void sctp_assoc_rwnd_decrease(struct sctp_association *asoc, unsigned int len) { int rx_count; int over = 0; if (unlikely(!asoc->rwnd || asoc->rwnd_over)) pr_debug("%s: association:%p has asoc->rwnd:%u, " "asoc->rwnd_over:%u! ", __func__, asoc, asoc->rwnd, asoc->rwnd_over); if (asoc->ep->rcvbuf_policy) rx_count = atomic_read(&asoc->rmem_alloc); else rx_count = atomic_read(&asoc->base.sk->sk_rmem_alloc); /* If we've reached or overflowed our receive buffer, announce * a 0 rwnd if rwnd would still be positive. Store the * the potential pressure overflow so that the window can be restored * back to original value. */ if (rx_count >= asoc->base.sk->sk_rcvbuf) over = 1; if (asoc->rwnd >= len) { asoc->rwnd -= len; if (over) { asoc->rwnd_press += asoc->rwnd; asoc->rwnd = 0; } } else { |
58b94d88d sctp: do not loos... |
1527 |
asoc->rwnd_over += len - asoc->rwnd; |
362d52040 Revert "net: sctp... |
1528 1529 1530 1531 1532 1533 1534 1535 |
asoc->rwnd = 0; } pr_debug("%s: asoc:%p rwnd decreased by %d to (%u, %u, %u) ", __func__, asoc, len, asoc->rwnd, asoc->rwnd_over, asoc->rwnd_press); } |
1da177e4c Linux-2.6.12-rc2 |
1536 1537 1538 1539 |
/* Build the bind address list for the association based on info from the * local endpoint and the remote peer. */ |
3182cd84f [SCTP]: __nocast ... |
1540 |
int sctp_assoc_set_bind_addr_from_ep(struct sctp_association *asoc, |
1c662018d sctp: remove the ... |
1541 |
enum sctp_scope scope, gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
1542 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1543 1544 1545 1546 1547 |
int flags; /* Use scoping rules to determine the subset of addresses from * the endpoint. */ |
1da177e4c Linux-2.6.12-rc2 |
1548 1549 1550 1551 1552 |
flags = (PF_INET6 == asoc->base.sk->sk_family) ? SCTP_ADDR6_ALLOWED : 0; if (asoc->peer.ipv4_address) flags |= SCTP_ADDR4_PEERSUPP; if (asoc->peer.ipv6_address) flags |= SCTP_ADDR6_PEERSUPP; |
4db67e808 sctp: Make the ad... |
1553 1554 |
return sctp_bind_addr_copy(sock_net(asoc->base.sk), &asoc->base.bind_addr, |
1da177e4c Linux-2.6.12-rc2 |
1555 1556 1557 1558 1559 1560 |
&asoc->ep->base.bind_addr, scope, gfp, flags); } /* Build the association's bind address list from the cookie. */ int sctp_assoc_set_bind_addr_from_cookie(struct sctp_association *asoc, |
3182cd84f [SCTP]: __nocast ... |
1561 |
struct sctp_cookie *cookie, |
dd0fc66fb [PATCH] gfp flags... |
1562 |
gfp_t gfp) |
1da177e4c Linux-2.6.12-rc2 |
1563 1564 1565 1566 1567 1568 1569 1570 |
{ int var_size2 = ntohs(cookie->peer_init->chunk_hdr.length); int var_size3 = cookie->raw_addr_list_len; __u8 *raw = (__u8 *)cookie->peer_init + var_size2; return sctp_raw_to_bind_addrs(&asoc->base.bind_addr, raw, var_size3, asoc->ep->base.bind_addr.port, gfp); } |
d808ad9ab [NET] SCTP: Fix w... |
1571 1572 |
/* Lookup laddr in the bind address list of an association. */ int sctp_assoc_lookup_laddr(struct sctp_association *asoc, |
1da177e4c Linux-2.6.12-rc2 |
1573 1574 |
const union sctp_addr *laddr) { |
559cf710b [SCTP]: Convert b... |
1575 |
int found = 0; |
1da177e4c Linux-2.6.12-rc2 |
1576 |
|
1da177e4c Linux-2.6.12-rc2 |
1577 1578 |
if ((asoc->base.bind_addr.port == ntohs(laddr->v4.sin_port)) && sctp_bind_addr_match(&asoc->base.bind_addr, laddr, |
559cf710b [SCTP]: Convert b... |
1579 |
sctp_sk(asoc->base.sk))) |
1da177e4c Linux-2.6.12-rc2 |
1580 |
found = 1; |
1da177e4c Linux-2.6.12-rc2 |
1581 |
|
1da177e4c Linux-2.6.12-rc2 |
1582 1583 |
return found; } |
07d939677 [SCTP]: Set assoc... |
1584 1585 1586 1587 |
/* Set an association id for a given association */ int sctp_assoc_set_id(struct sctp_association *asoc, gfp_t gfp) { |
d0164adc8 mm, page_alloc: d... |
1588 |
bool preload = gfpflags_allow_blocking(gfp); |
94960e8c2 sctp: convert to ... |
1589 |
int ret; |
c6ba68a26 sctp: support non... |
1590 1591 1592 |
/* If the id is already assigned, keep it. */ if (asoc->assoc_id) |
94960e8c2 sctp: convert to ... |
1593 |
return 0; |
07d939677 [SCTP]: Set assoc... |
1594 |
|
94960e8c2 sctp: convert to ... |
1595 1596 |
if (preload) idr_preload(gfp); |
07d939677 [SCTP]: Set assoc... |
1597 |
spin_lock_bh(&sctp_assocs_id_lock); |
713e00a32 sctp: convert sct... |
1598 1599 |
/* 0 is not a valid assoc_id, must be >= 1 */ ret = idr_alloc_cyclic(&sctp_assocs_id, asoc, 1, 0, GFP_NOWAIT); |
07d939677 [SCTP]: Set assoc... |
1600 |
spin_unlock_bh(&sctp_assocs_id_lock); |
94960e8c2 sctp: convert to ... |
1601 1602 1603 1604 |
if (preload) idr_preload_end(); if (ret < 0) return ret; |
07d939677 [SCTP]: Set assoc... |
1605 |
|
94960e8c2 sctp: convert to ... |
1606 1607 |
asoc->assoc_id = (sctp_assoc_t)ret; return 0; |
07d939677 [SCTP]: Set assoc... |
1608 |
} |
a08de64d0 [SCTP]: Update AS... |
1609 |
|
8b4472cc1 sctp: fix memory ... |
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 |
/* Free the ASCONF queue */ static void sctp_assoc_free_asconf_queue(struct sctp_association *asoc) { struct sctp_chunk *asconf; struct sctp_chunk *tmp; list_for_each_entry_safe(asconf, tmp, &asoc->addip_chunk_list, list) { list_del_init(&asconf->list); sctp_chunk_free(asconf); } } |
a08de64d0 [SCTP]: Update AS... |
1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 |
/* Free asconf_ack cache */ static void sctp_assoc_free_asconf_acks(struct sctp_association *asoc) { struct sctp_chunk *ack; struct sctp_chunk *tmp; list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list, transmitted_list) { list_del_init(&ack->transmitted_list); sctp_chunk_free(ack); } } /* Clean up the ASCONF_ACK queue */ void sctp_assoc_clean_asconf_ack_cache(const struct sctp_association *asoc) { struct sctp_chunk *ack; struct sctp_chunk *tmp; |
25985edce Fix common misspe... |
1639 |
/* We can remove all the entries from the queue up to |
a08de64d0 [SCTP]: Update AS... |
1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 |
* the "Peer-Sequence-Number". */ list_for_each_entry_safe(ack, tmp, &asoc->asconf_ack_list, transmitted_list) { if (ack->subh.addip_hdr->serial == htonl(asoc->peer.addip_serial)) break; list_del_init(&ack->transmitted_list); sctp_chunk_free(ack); } } /* Find the ASCONF_ACK whose serial number matches ASCONF */ struct sctp_chunk *sctp_assoc_lookup_asconf_ack( const struct sctp_association *asoc, __be32 serial) { |
a86998142 [SCTP]: Fix kerne... |
1658 |
struct sctp_chunk *ack; |
a08de64d0 [SCTP]: Update AS... |
1659 1660 1661 1662 1663 |
/* Walk through the list of cached ASCONF-ACKs and find the * ack chunk whose serial number matches that of the request. */ list_for_each_entry(ack, &asoc->asconf_ack_list, transmitted_list) { |
b69040d8e net: sctp: fix pa... |
1664 1665 |
if (sctp_chunk_pending(ack)) continue; |
a08de64d0 [SCTP]: Update AS... |
1666 1667 |
if (ack->subh.addip_hdr->serial == serial) { sctp_chunk_hold(ack); |
a86998142 [SCTP]: Fix kerne... |
1668 |
return ack; |
a08de64d0 [SCTP]: Update AS... |
1669 1670 |
} } |
a86998142 [SCTP]: Fix kerne... |
1671 |
return NULL; |
a08de64d0 [SCTP]: Update AS... |
1672 |
} |
a000c01e6 sctp: stop pendin... |
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 |
void sctp_asconf_queue_teardown(struct sctp_association *asoc) { /* Free any cached ASCONF_ACK chunk. */ sctp_assoc_free_asconf_acks(asoc); /* Free the ASCONF queue. */ sctp_assoc_free_asconf_queue(asoc); /* Free any cached ASCONF chunk. */ if (asoc->addip_last_asconf) sctp_chunk_free(asoc->addip_last_asconf); } |