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[SCTP]: Update SCTP_PEER_ADDR_PARAMS socket option to the latest api draft.

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This patch adds support to set/get heartbeat interval, maximum number of
retransmissions, pathmtu, sackdelay time for a particular transport/
association/socket as per the latest SCTP sockets api draft11.

Signed-off-by: Frank Filz <ffilz@us.ibm.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Frank Filz 2005-12-22 11:36:46 -08:00 committed by David S. Miller
parent fd9662555c
commit 52ccb8e90c
9 changed files with 602 additions and 227 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
include/net/sctp/structs.h
View File

@ -277,6 +277,24 @@ struct sctp_sock {
__u32 default_context;
__u32 default_timetolive;
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
* the destination address every heartbeat interval. This value
* will be inherited by all new associations.
*/
__u32 hbinterval;
/* This is the max_retrans value for new associations. */
__u16 pathmaxrxt;
/* The initial Path MTU to use for new associations. */
__u32 pathmtu;
/* The default SACK delay timeout for new associations. */
__u32 sackdelay;
/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
__u32 param_flags;
struct sctp_initmsg initmsg;
struct sctp_rtoinfo rtoinfo;
struct sctp_paddrparams paddrparam;
@ -845,9 +863,6 @@ struct sctp_transport {
/* Data that has been sent, but not acknowledged. */
__u32 flight_size;
/* PMTU : The current known path MTU. */
__u32 pmtu;
/* Destination */
struct dst_entry *dst;
/* Source address. */
@ -862,7 +877,22 @@ struct sctp_transport {
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
* the destination address every heartbeat interval.
*/
int hb_interval;
__u32 hbinterval;
/* This is the max_retrans value for the transport and will
* be initialized from the assocs value. This can be changed
* using SCTP_SET_PEER_ADDR_PARAMS socket option.
*/
__u16 pathmaxrxt;
/* PMTU : The current known path MTU. */
__u32 pathmtu;
/* SACK delay timeout */
__u32 sackdelay;
/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
__u32 param_flags;
/* When was the last time (in jiffies) that we heard from this
* transport? We use this to pick new active and retran paths.
@ -882,22 +912,11 @@ struct sctp_transport {
*/
int state;
/* hb_allowed : The current heartbeat state of this destination,
* : i.e. ALLOW-HB, NO-HEARTBEAT, etc.
*/
int hb_allowed;
/* These are the error stats for this destination. */
/* Error count : The current error count for this destination. */
unsigned short error_count;
/* This is the max_retrans value for the transport and will
* be initialized to proto.max_retrans.path. This can be changed
* using SCTP_SET_PEER_ADDR_PARAMS socket option.
*/
int max_retrans;
/* Per : A timer used by each destination.
* Destination :
* Timer :
@ -1502,6 +1521,28 @@ struct sctp_association {
/* The largest timeout or RTO value to use in attempting an INIT */
__u16 max_init_timeo;
/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
* the destination address every heartbeat interval. This value
* will be inherited by all new transports.
*/
__u32 hbinterval;
/* This is the max_retrans value for new transports in the
* association.
*/
__u16 pathmaxrxt;
/* Association : The smallest PMTU discovered for all of the
* PMTU : peer's transport addresses.
*/
__u32 pathmtu;
/* SACK delay timeout */
__u32 sackdelay;
/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
__u32 param_flags;
int timeouts[SCTP_NUM_TIMEOUT_TYPES];
struct timer_list timers[SCTP_NUM_TIMEOUT_TYPES];
@ -1571,11 +1612,6 @@ struct sctp_association {
*/
wait_queue_head_t wait;
/* Association : The smallest PMTU discovered for all of the
* PMTU : peer's transport addresses.
*/
__u32 pmtu;
/* The message size at which SCTP fragmentation will occur. */
__u32 frag_point;

16
include/net/sctp/user.h
View File

@ -503,11 +503,27 @@ struct sctp_setadaption {
* unreachable. The following structure is used to access and modify an
* address's parameters:
*/
enum sctp_spp_flags {
SPP_HB_ENABLE = 1, /*Enable heartbeats*/
SPP_HB_DISABLE = 2, /*Disable heartbeats*/
SPP_HB = SPP_HB_ENABLE | SPP_HB_DISABLE,
SPP_HB_DEMAND = 4, /*Send heartbeat immediately*/
SPP_PMTUD_ENABLE = 8, /*Enable PMTU discovery*/
SPP_PMTUD_DISABLE = 16, /*Disable PMTU discovery*/
SPP_PMTUD = SPP_PMTUD_ENABLE | SPP_PMTUD_DISABLE,
SPP_SACKDELAY_ENABLE = 32, /*Enable SACK*/
SPP_SACKDELAY_DISABLE = 64, /*Disable SACK*/
SPP_SACKDELAY = SPP_SACKDELAY_ENABLE | SPP_SACKDELAY_DISABLE,
};
struct sctp_paddrparams {
sctp_assoc_t spp_assoc_id;
struct sockaddr_storage spp_address;
__u32 spp_hbinterval;
__u16 spp_pathmaxrxt;
__u32 spp_pathmtu;
__u32 spp_sackdelay;
__u32 spp_flags;
} __attribute__((packed, aligned(4)));
/*

81
net/sctp/associola.c
View File

@ -110,7 +110,6 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
asoc->cookie_life.tv_sec = sp->assocparams.sasoc_cookie_life / 1000;
asoc->cookie_life.tv_usec = (sp->assocparams.sasoc_cookie_life % 1000)
* 1000;
asoc->pmtu = 0;
asoc->frag_point = 0;
/* Set the association max_retrans and RTO values from the
@ -123,6 +122,25 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
asoc->overall_error_count = 0;
/* 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);
/* Set the association default flags controlling
* Heartbeat, SACK delay, and Path MTU Discovery.
*/
asoc->param_flags = sp->param_flags;
/* Initialize the maximum mumber of new data packets that can be sent
* in a burst.
*/
@ -144,8 +162,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
= 5 * asoc->rto_max;
asoc->timeouts[SCTP_EVENT_TIMEOUT_HEARTBEAT] = 0;
asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] =
SCTP_DEFAULT_TIMEOUT_SACK;
asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] = asoc->sackdelay;
asoc->timeouts[SCTP_EVENT_TIMEOUT_AUTOCLOSE] =
sp->autoclose * HZ;
@ -540,23 +557,46 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
sctp_transport_set_owner(peer, asoc);
/* 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;
/* Initialize the peer's SACK delay timeout based on the
* association configured value.
*/
peer->sackdelay = asoc->sackdelay;
/* Enable/disable heartbeat, SACK delay, and path MTU discovery
* based on association setting.
*/
peer->param_flags = asoc->param_flags;
/* Initialize the pmtu of the transport. */
sctp_transport_pmtu(peer);
if (peer->param_flags & SPP_PMTUD_ENABLE)
sctp_transport_pmtu(peer);
else if (asoc->pathmtu)
peer->pathmtu = asoc->pathmtu;
else
peer->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
/* 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.
*/
if (asoc->pmtu)
asoc->pmtu = min_t(int, peer->pmtu, asoc->pmtu);
if (asoc->pathmtu)
asoc->pathmtu = min_t(int, peer->pathmtu, asoc->pathmtu);
else
asoc->pmtu = peer->pmtu;
asoc->pathmtu = peer->pathmtu;
SCTP_DEBUG_PRINTK("sctp_assoc_add_peer:association %p PMTU set to "
"%d\n", asoc, asoc->pmtu);
"%d\n", asoc, asoc->pathmtu);
asoc->frag_point = sctp_frag_point(sp, asoc->pmtu);
asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu);
/* The asoc->peer.port might not be meaningful yet, but
* initialize the packet structure anyway.
@ -574,7 +614,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
* (for example, implementations MAY use the size of the
* receiver advertised window).
*/
peer->cwnd = min(4*asoc->pmtu, max_t(__u32, 2*asoc->pmtu, 4380));
peer->cwnd = min(4*asoc->pathmtu, max_t(__u32, 2*asoc->pathmtu, 4380));
/* At this point, we may not have the receiver's advertised window,
* so initialize ssthresh to the default value and it will be set
@ -585,17 +625,6 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
peer->partial_bytes_acked = 0;
peer->flight_size = 0;
/* By default, enable heartbeat for peer address. */
peer->hb_allowed = 1;
/* Initialize the peer's heartbeat interval based on the
* sock configured value.
*/
peer->hb_interval = msecs_to_jiffies(sp->paddrparam.spp_hbinterval);
/* Set the path max_retrans. */
peer->max_retrans = sp->paddrparam.spp_pathmaxrxt;
/* Set the transport's RTO.initial value */
peer->rto = asoc->rto_initial;
@ -1155,18 +1184,18 @@ void sctp_assoc_sync_pmtu(struct sctp_association *asoc)
/* Get the lowest pmtu of all the transports. */
list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports);
if (!pmtu || (t->pmtu < pmtu))
pmtu = t->pmtu;
if (!pmtu || (t->pathmtu < pmtu))
pmtu = t->pathmtu;
}
if (pmtu) {
struct sctp_sock *sp = sctp_sk(asoc->base.sk);
asoc->pmtu = pmtu;
asoc->pathmtu = pmtu;
asoc->frag_point = sctp_frag_point(sp, pmtu);
}
SCTP_DEBUG_PRINTK("%s: asoc:%p, pmtu:%d, frag_point:%d\n",
__FUNCTION__, asoc, asoc->pmtu, asoc->frag_point);
__FUNCTION__, asoc, asoc->pathmtu, asoc->frag_point);
}
/* Should we send a SACK to update our peer? */
@ -1179,7 +1208,7 @@ static inline int sctp_peer_needs_update(struct sctp_association *asoc)
case SCTP_STATE_SHUTDOWN_SENT:
if ((asoc->rwnd > asoc->a_rwnd) &&
((asoc->rwnd - asoc->a_rwnd) >=
min_t(__u32, (asoc->base.sk->sk_rcvbuf >> 1), asoc->pmtu)))
min_t(__u32, (asoc->base.sk->sk_rcvbuf >> 1), asoc->pathmtu)))
return 1;
break;
default:

38
net/sctp/input.c
View File

@ -305,18 +305,36 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
struct sctp_transport *t, __u32 pmtu)
{
if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
printk(KERN_WARNING "%s: Reported pmtu %d too low, "
"using default minimum of %d\n", __FUNCTION__, pmtu,
SCTP_DEFAULT_MINSEGMENT);
pmtu = SCTP_DEFAULT_MINSEGMENT;
if (sock_owned_by_user(sk) || !t || (t->pathmtu == pmtu))
return;
if (t->param_flags & SPP_PMTUD_ENABLE) {
if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
printk(KERN_WARNING "%s: Reported pmtu %d too low, "
"using default minimum of %d\n",
__FUNCTION__, pmtu,
SCTP_DEFAULT_MINSEGMENT);
/* Use default minimum segment size and disable
* pmtu discovery on this transport.
*/
t->pathmtu = SCTP_DEFAULT_MINSEGMENT;
t->param_flags = (t->param_flags & ~SPP_HB) |
SPP_PMTUD_DISABLE;
} else {
t->pathmtu = pmtu;
}
/* Update association pmtu. */
sctp_assoc_sync_pmtu(asoc);
}
if (!sock_owned_by_user(sk) && t && (t->pmtu != pmtu)) {
t->pmtu = pmtu;
sctp_assoc_sync_pmtu(asoc);
sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
}
/* Retransmit with the new pmtu setting.
* Normally, if PMTU discovery is disabled, an ICMP Fragmentation
* Needed will never be sent, but if a message was sent before
* PMTU discovery was disabled that was larger than the PMTU, it
* would not be fragmented, so it must be re-transmitted fragmented.
*/
sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
}
/*

17
net/sctp/output.c
View File

@ -234,8 +234,8 @@ sctp_xmit_t sctp_packet_append_chunk(struct sctp_packet *packet,
goto finish;
pmtu = ((packet->transport->asoc) ?
(packet->transport->asoc->pmtu) :
(packet->transport->pmtu));
(packet->transport->asoc->pathmtu) :
(packet->transport->pathmtu));
too_big = (psize + chunk_len > pmtu);
@ -482,7 +482,9 @@ int sctp_packet_transmit(struct sctp_packet *packet)
if (!dst || (dst->obsolete > 1)) {
dst_release(dst);
sctp_transport_route(tp, NULL, sctp_sk(sk));
sctp_assoc_sync_pmtu(asoc);
if (asoc->param_flags & SPP_PMTUD_ENABLE) {
sctp_assoc_sync_pmtu(asoc);
}
}
nskb->dst = dst_clone(tp->dst);
@ -492,7 +494,10 @@ int sctp_packet_transmit(struct sctp_packet *packet)
SCTP_DEBUG_PRINTK("***sctp_transmit_packet*** skb len %d\n",
nskb->len);
(*tp->af_specific->sctp_xmit)(nskb, tp, packet->ipfragok);
if (tp->param_flags & SPP_PMTUD_ENABLE)
(*tp->af_specific->sctp_xmit)(nskb, tp, packet->ipfragok);
else
(*tp->af_specific->sctp_xmit)(nskb, tp, 1);
out:
packet->size = packet->overhead;
@ -577,7 +582,7 @@ static sctp_xmit_t sctp_packet_append_data(struct sctp_packet *packet,
* if ((flightsize + Max.Burst * MTU) < cwnd)
* cwnd = flightsize + Max.Burst * MTU
*/
max_burst_bytes = asoc->max_burst * asoc->pmtu;
max_burst_bytes = asoc->max_burst * asoc->pathmtu;
if ((transport->flight_size + max_burst_bytes) < transport->cwnd) {
transport->cwnd = transport->flight_size + max_burst_bytes;
SCTP_DEBUG_PRINTK("%s: cwnd limited by max_burst: "
@ -622,7 +627,7 @@ static sctp_xmit_t sctp_packet_append_data(struct sctp_packet *packet,
* data will fit or delay in hopes of bundling a full
* sized packet.
*/
if (len < asoc->pmtu - packet->overhead) {
if (len < asoc->pathmtu - packet->overhead) {
retval = SCTP_XMIT_NAGLE_DELAY;
goto finish;
}

26
net/sctp/sm_sideeffect.c
View File

@ -157,9 +157,12 @@ static int sctp_gen_sack(struct sctp_association *asoc, int force,
{
__u32 ctsn, max_tsn_seen;
struct sctp_chunk *sack;
struct sctp_transport *trans = asoc->peer.last_data_from;
int error = 0;
if (force)
if (force ||
(!trans && (asoc->param_flags & SPP_SACKDELAY_DISABLE)) ||
(trans && (trans->param_flags & SPP_SACKDELAY_DISABLE)))
asoc->peer.sack_needed = 1;
ctsn = sctp_tsnmap_get_ctsn(&asoc->peer.tsn_map);
@ -189,7 +192,22 @@ static int sctp_gen_sack(struct sctp_association *asoc, int force,
if (!asoc->peer.sack_needed) {
/* We will need a SACK for the next packet. */
asoc->peer.sack_needed = 1;
goto out;
/* Set the SACK delay timeout based on the
* SACK delay for the last transport
* data was received from, or the default
* for the association.
*/
if (trans)
asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] =
trans->sackdelay;
else
asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] =
asoc->sackdelay;
/* Restart the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
} else {
if (asoc->a_rwnd > asoc->rwnd)
asoc->a_rwnd = asoc->rwnd;
@ -205,7 +223,7 @@ static int sctp_gen_sack(struct sctp_association *asoc, int force,
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
}
out:
return error;
nomem:
error = -ENOMEM;
@ -415,7 +433,7 @@ static void sctp_do_8_2_transport_strike(struct sctp_association *asoc,
asoc->overall_error_count++;
if (transport->state != SCTP_INACTIVE &&
(transport->error_count++ >= transport->max_retrans)) {
(transport->error_count++ >= transport->pathmaxrxt)) {
SCTP_DEBUG_PRINTK_IPADDR("transport_strike:association %p",
" transport IP: port:%d failed.\n",
asoc,

20
net/sctp/sm_statefuns.c
View File

@ -900,7 +900,7 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const struct sctp_endpoint *ep,
* HEARTBEAT is sent (see Section 8.3).
*/
if (transport->hb_allowed) {
if (transport->param_flags & SPP_HB_ENABLE) {
if (SCTP_DISPOSITION_NOMEM ==
sctp_sf_heartbeat(ep, asoc, type, arg,
commands))
@ -1051,7 +1051,7 @@ sctp_disposition_t sctp_sf_backbeat_8_3(const struct sctp_endpoint *ep,
return SCTP_DISPOSITION_DISCARD;
}
max_interval = link->hb_interval + link->rto;
max_interval = link->hbinterval + link->rto;
/* Check if the timestamp looks valid. */
if (time_after(hbinfo->sent_at, jiffies) ||
@ -2691,14 +2691,9 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
* document allow. However, an SCTP transmitter MUST NOT be
* more aggressive than the following algorithms allow.
*/
if (chunk->end_of_packet) {
if (chunk->end_of_packet)
sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, SCTP_NOFORCE());
/* Start the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
}
return SCTP_DISPOSITION_CONSUME;
discard_force:
@ -2721,13 +2716,9 @@ discard_force:
return SCTP_DISPOSITION_DISCARD;
discard_noforce:
if (chunk->end_of_packet) {
if (chunk->end_of_packet)
sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, SCTP_NOFORCE());
/* Start the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
}
return SCTP_DISPOSITION_DISCARD;
consume:
return SCTP_DISPOSITION_CONSUME;
@ -3442,9 +3433,6 @@ sctp_disposition_t sctp_sf_eat_fwd_tsn(const struct sctp_endpoint *ep,
* send another.
*/
sctp_add_cmd_sf(commands, SCTP_CMD_GEN_SACK, SCTP_NOFORCE());
/* Start the SACK timer. */
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_SACK));
return SCTP_DISPOSITION_CONSUME;

523
net/sctp/socket.c
View File

@ -1941,106 +1941,275 @@ static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval,
* address's parameters:
*
* struct sctp_paddrparams {
* sctp_assoc_t spp_assoc_id;
* struct sockaddr_storage spp_address;
* uint32_t spp_hbinterval;
* uint16_t spp_pathmaxrxt;
* };
* sctp_assoc_t spp_assoc_id;
* struct sockaddr_storage spp_address;
* uint32_t spp_hbinterval;
* uint16_t spp_pathmaxrxt;
* uint32_t spp_pathmtu;
* uint32_t spp_sackdelay;
* uint32_t spp_flags;
* };
*
* spp_assoc_id - (UDP style socket) This is filled in the application,
* and identifies the association for this query.
* spp_assoc_id - (one-to-many style socket) This is filled in the
* application, and identifies the association for
* this query.
* spp_address - This specifies which address is of interest.
* spp_hbinterval - This contains the value of the heartbeat interval,
* in milliseconds. A value of 0, when modifying the
* parameter, specifies that the heartbeat on this
* address should be disabled. A value of UINT32_MAX
* (4294967295), when modifying the parameter,
* specifies that a heartbeat should be sent
* immediately to the peer address, and the current
* interval should remain unchanged.
* in milliseconds. If a value of zero
* is present in this field then no changes are to
* be made to this parameter.
* spp_pathmaxrxt - This contains the maximum number of
* retransmissions before this address shall be
* considered unreachable.
* considered unreachable. If a value of zero
* is present in this field then no changes are to
* be made to this parameter.
* spp_pathmtu - When Path MTU discovery is disabled the value
* specified here will be the "fixed" path mtu.
* Note that if the spp_address field is empty
* then all associations on this address will
* have this fixed path mtu set upon them.
*
* spp_sackdelay - When delayed sack is enabled, this value specifies
* the number of milliseconds that sacks will be delayed
* for. This value will apply to all addresses of an
* association if the spp_address field is empty. Note
* also, that if delayed sack is enabled and this
* value is set to 0, no change is made to the last
* recorded delayed sack timer value.
*
* spp_flags - These flags are used to control various features
* on an association. The flag field may contain
* zero or more of the following options.
*
* SPP_HB_ENABLE - Enable heartbeats on the
* specified address. Note that if the address
* field is empty all addresses for the association
* have heartbeats enabled upon them.
*
* SPP_HB_DISABLE - Disable heartbeats on the
* speicifed address. Note that if the address
* field is empty all addresses for the association
* will have their heartbeats disabled. Note also
* that SPP_HB_ENABLE and SPP_HB_DISABLE are
* mutually exclusive, only one of these two should
* be specified. Enabling both fields will have
* undetermined results.
*
* SPP_HB_DEMAND - Request a user initiated heartbeat
* to be made immediately.
*
* SPP_PMTUD_ENABLE - This field will enable PMTU
* discovery upon the specified address. Note that
* if the address feild is empty then all addresses
* on the association are effected.
*
* SPP_PMTUD_DISABLE - This field will disable PMTU
* discovery upon the specified address. Note that
* if the address feild is empty then all addresses
* on the association are effected. Not also that
* SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
* exclusive. Enabling both will have undetermined
* results.
*
* SPP_SACKDELAY_ENABLE - Setting this flag turns
* on delayed sack. The time specified in spp_sackdelay
* is used to specify the sack delay for this address. Note
* that if spp_address is empty then all addresses will
* enable delayed sack and take on the sack delay
* value specified in spp_sackdelay.
* SPP_SACKDELAY_DISABLE - Setting this flag turns
* off delayed sack. If the spp_address field is blank then
* delayed sack is disabled for the entire association. Note
* also that this field is mutually exclusive to
* SPP_SACKDELAY_ENABLE, setting both will have undefined
* results.
*/
static int sctp_setsockopt_peer_addr_params(struct sock *sk,
char __user *optval, int optlen)
int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
struct sctp_transport *trans,
struct sctp_association *asoc,
struct sctp_sock *sp,
int hb_change,
int pmtud_change,
int sackdelay_change)
{
struct sctp_paddrparams params;
struct sctp_transport *trans;
int error;
if (optlen != sizeof(struct sctp_paddrparams))
return -EINVAL;
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
/*
* API 7. Socket Options (setting the default value for the endpoint)
* All options that support specific settings on an association by
* filling in either an association id variable or a sockaddr_storage
* SHOULD also support setting of the same value for the entire endpoint
* (i.e. future associations). To accomplish this the following logic is
* used when setting one of these options:
* c) If neither the sockaddr_storage or association identification is
* set i.e. the sockaddr_storage is set to all 0's (INADDR_ANY) and
* the association identification is 0, the settings are a default
* and to be applied to the endpoint (all future associations).
*/
/* update default value for endpoint (all future associations) */
if (!params.spp_assoc_id &&
sctp_is_any(( union sctp_addr *)&params.spp_address)) {
/* Manual heartbeat on an endpoint is invalid. */
if (0xffffffff == params.spp_hbinterval)
return -EINVAL;
else if (params.spp_hbinterval)
sctp_sk(sk)->paddrparam.spp_hbinterval =
params.spp_hbinterval;
if (params.spp_pathmaxrxt)
sctp_sk(sk)->paddrparam.spp_pathmaxrxt =
params.spp_pathmaxrxt;
return 0;
}
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans)
return -EINVAL;
/* Applications can enable or disable heartbeats for any peer address
* of an association, modify an address's heartbeat interval, force a
* heartbeat to be sent immediately, and adjust the address's maximum
* number of retransmissions sent before an address is considered
* unreachable.
*
* The value of the heartbeat interval, in milliseconds. A value of
* UINT32_MAX (4294967295), when modifying the parameter, specifies
* that a heartbeat should be sent immediately to the peer address,
* and the current interval should remain unchanged.
*/
if (0xffffffff == params.spp_hbinterval) {
if (params->spp_flags & SPP_HB_DEMAND && trans) {
error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans);
if (error)
return error;
} else {
/* The value of the heartbeat interval, in milliseconds. A value of 0,
* when modifying the parameter, specifies that the heartbeat on this
* address should be disabled.
*/
if (params.spp_hbinterval) {
trans->hb_allowed = 1;
trans->hb_interval =
msecs_to_jiffies(params.spp_hbinterval);
} else
trans->hb_allowed = 0;
}
/* spp_pathmaxrxt contains the maximum number of retransmissions
* before this address shall be considered unreachable.
if (params->spp_hbinterval) {
if (trans) {
trans->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
} else if (asoc) {
asoc->hbinterval = msecs_to_jiffies(params->spp_hbinterval);
} else {
sp->hbinterval = params->spp_hbinterval;
}
}
if (hb_change) {
if (trans) {
trans->param_flags =
(trans->param_flags & ~SPP_HB) | hb_change;
} else if (asoc) {
asoc->param_flags =
(asoc->param_flags & ~SPP_HB) | hb_change;
} else {
sp->param_flags =
(sp->param_flags & ~SPP_HB) | hb_change;
}
}
if (params->spp_pathmtu) {
if (trans) {
trans->pathmtu = params->spp_pathmtu;
sctp_assoc_sync_pmtu(asoc);
} else if (asoc) {
asoc->pathmtu = params->spp_pathmtu;
sctp_frag_point(sp, params->spp_pathmtu);
} else {
sp->pathmtu = params->spp_pathmtu;
}
}
if (pmtud_change) {
if (trans) {
int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
(params->spp_flags & SPP_PMTUD_ENABLE);
trans->param_flags =
(trans->param_flags & ~SPP_PMTUD) | pmtud_change;
if (update) {
sctp_transport_pmtu(trans);
sctp_assoc_sync_pmtu(asoc);
}
} else if (asoc) {
asoc->param_flags =
(asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
} else {
sp->param_flags =
(sp->param_flags & ~SPP_PMTUD) | pmtud_change;
}
}
if (params->spp_sackdelay) {
if (trans) {
trans->sackdelay =
msecs_to_jiffies(params->spp_sackdelay);
} else if (asoc) {
asoc->sackdelay =
msecs_to_jiffies(params->spp_sackdelay);
} else {
sp->sackdelay = params->spp_sackdelay;
}
}
if (sackdelay_change) {
if (trans) {
trans->param_flags =
(trans->param_flags & ~SPP_SACKDELAY) |
sackdelay_change;
} else if (asoc) {
asoc->param_flags =
(asoc->param_flags & ~SPP_SACKDELAY) |
sackdelay_change;
} else {
sp->param_flags =
(sp->param_flags & ~SPP_SACKDELAY) |
sackdelay_change;
}
}
if (params->spp_pathmaxrxt) {
if (trans) {
trans->pathmaxrxt = params->spp_pathmaxrxt;
} else if (asoc) {
asoc->pathmaxrxt = params->spp_pathmaxrxt;
} else {
sp->pathmaxrxt = params->spp_pathmaxrxt;
}
}
return 0;
}
static int sctp_setsockopt_peer_addr_params(struct sock *sk,
char __user *optval, int optlen)
{
struct sctp_paddrparams params;
struct sctp_transport *trans = NULL;
struct sctp_association *asoc = NULL;
struct sctp_sock *sp = sctp_sk(sk);
int error;
int hb_change, pmtud_change, sackdelay_change;
if (optlen != sizeof(struct sctp_paddrparams))
return - EINVAL;
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
/* Validate flags and value parameters. */
hb_change = params.spp_flags & SPP_HB;
pmtud_change = params.spp_flags & SPP_PMTUD;
sackdelay_change = params.spp_flags & SPP_SACKDELAY;
if (hb_change == SPP_HB ||
pmtud_change == SPP_PMTUD ||
sackdelay_change == SPP_SACKDELAY ||
params.spp_sackdelay > 500 ||
(params.spp_pathmtu
&& params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
return -EINVAL;
/* If an address other than INADDR_ANY is specified, and
* no transport is found, then the request is invalid.
*/
if (params.spp_pathmaxrxt)
trans->max_retrans = params.spp_pathmaxrxt;
if (!sctp_is_any(( union sctp_addr *)&params.spp_address)) {
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans)
return -EINVAL;
}
/* Get association, if assoc_id != 0 and the socket is a one
* to many style socket, and an association was not found, then
* the id was invalid.
*/
asoc = sctp_id2assoc(sk, params.spp_assoc_id);
if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP))
return -EINVAL;
/* Heartbeat demand can only be sent on a transport or
* association, but not a socket.
*/
if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc)
return -EINVAL;
/* Process parameters. */
error = sctp_apply_peer_addr_params(&params, trans, asoc, sp,
hb_change, pmtud_change,
sackdelay_change);
if (error)
return error;
/* If changes are for association, also apply parameters to each
* transport.
*/
if (!trans && asoc) {
struct list_head *pos;
list_for_each(pos, &asoc->peer.transport_addr_list) {
trans = list_entry(pos, struct sctp_transport,
transports);
sctp_apply_peer_addr_params(&params, trans, asoc, sp,
hb_change, pmtud_change,
sackdelay_change);
}
}
return 0;
}
@ -2334,7 +2503,7 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optl
/* Update the frag_point of the existing associations. */
list_for_each(pos, &(sp->ep->asocs)) {
asoc = list_entry(pos, struct sctp_association, asocs);
asoc->frag_point = sctp_frag_point(sp, asoc->pmtu);
asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu);
}
return 0;
@ -2715,8 +2884,13 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
/* Default Peer Address Parameters. These defaults can
* be modified via SCTP_PEER_ADDR_PARAMS
*/
sp->paddrparam.spp_hbinterval = jiffies_to_msecs(sctp_hb_interval);
sp->paddrparam.spp_pathmaxrxt = sctp_max_retrans_path;
sp->hbinterval = jiffies_to_msecs(sctp_hb_interval);
sp->pathmaxrxt = sctp_max_retrans_path;
sp->pathmtu = 0; // allow default discovery
sp->sackdelay = sctp_sack_timeout;
sp->param_flags = SPP_HB_ENABLE |
SPP_PMTUD_ENABLE |
SPP_SACKDELAY_ENABLE;
/* If enabled no SCTP message fragmentation will be performed.
* Configure through SCTP_DISABLE_FRAGMENTS socket option.
@ -2865,7 +3039,7 @@ static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
status.sstat_primary.spinfo_cwnd = transport->cwnd;
status.sstat_primary.spinfo_srtt = transport->srtt;
status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
status.sstat_primary.spinfo_mtu = transport->pmtu;
status.sstat_primary.spinfo_mtu = transport->pathmtu;
if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
status.sstat_primary.spinfo_state = SCTP_ACTIVE;
@ -2924,7 +3098,7 @@ static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
pinfo.spinfo_cwnd = transport->cwnd;
pinfo.spinfo_srtt = transport->srtt;
pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
pinfo.spinfo_mtu = transport->pmtu;
pinfo.spinfo_mtu = transport->pathmtu;
if (pinfo.spinfo_state == SCTP_UNKNOWN)
pinfo.spinfo_state = SCTP_ACTIVE;
@ -3086,69 +3260,154 @@ out:
* address's parameters:
*
* struct sctp_paddrparams {
* sctp_assoc_t spp_assoc_id;
* struct sockaddr_storage spp_address;
* uint32_t spp_hbinterval;
* uint16_t spp_pathmaxrxt;
* };
* sctp_assoc_t spp_assoc_id;
* struct sockaddr_storage spp_address;
* uint32_t spp_hbinterval;
* uint16_t spp_pathmaxrxt;
* uint32_t spp_pathmtu;
* uint32_t spp_sackdelay;
* uint32_t spp_flags;
* };
*
* spp_assoc_id - (UDP style socket) This is filled in the application,
* and identifies the association for this query.
* spp_assoc_id - (one-to-many style socket) This is filled in the
* application, and identifies the association for
* this query.
* spp_address - This specifies which address is of interest.
* spp_hbinterval - This contains the value of the heartbeat interval,
* in milliseconds. A value of 0, when modifying the
* parameter, specifies that the heartbeat on this
* address should be disabled. A value of UINT32_MAX
* (4294967295), when modifying the parameter,
* specifies that a heartbeat should be sent
* immediately to the peer address, and the current
* interval should remain unchanged.
* in milliseconds. If a value of zero
* is present in this field then no changes are to
* be made to this parameter.
* spp_pathmaxrxt - This contains the maximum number of
* retransmissions before this address shall be
* considered unreachable.
* considered unreachable. If a value of zero
* is present in this field then no changes are to
* be made to this parameter.
* spp_pathmtu - When Path MTU discovery is disabled the value
* specified here will be the "fixed" path mtu.
* Note that if the spp_address field is empty
* then all associations on this address will
* have this fixed path mtu set upon them.
*
* spp_sackdelay - When delayed sack is enabled, this value specifies
* the number of milliseconds that sacks will be delayed
* for. This value will apply to all addresses of an
* association if the spp_address field is empty. Note
* also, that if delayed sack is enabled and this
* value is set to 0, no change is made to the last
* recorded delayed sack timer value.
*
* spp_flags - These flags are used to control various features
* on an association. The flag field may contain
* zero or more of the following options.
*
* SPP_HB_ENABLE - Enable heartbeats on the
* specified address. Note that if the address
* field is empty all addresses for the association
* have heartbeats enabled upon them.
*
* SPP_HB_DISABLE - Disable heartbeats on the
* speicifed address. Note that if the address
* field is empty all addresses for the association
* will have their heartbeats disabled. Note also
* that SPP_HB_ENABLE and SPP_HB_DISABLE are
* mutually exclusive, only one of these two should
* be specified. Enabling both fields will have
* undetermined results.
*
* SPP_HB_DEMAND - Request a user initiated heartbeat
* to be made immediately.
*
* SPP_PMTUD_ENABLE - This field will enable PMTU
* discovery upon the specified address. Note that
* if the address feild is empty then all addresses
* on the association are effected.
*
* SPP_PMTUD_DISABLE - This field will disable PMTU
* discovery upon the specified address. Note that
* if the address feild is empty then all addresses
* on the association are effected. Not also that
* SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
* exclusive. Enabling both will have undetermined
* results.
*
* SPP_SACKDELAY_ENABLE - Setting this flag turns
* on delayed sack. The time specified in spp_sackdelay
* is used to specify the sack delay for this address. Note
* that if spp_address is empty then all addresses will
* enable delayed sack and take on the sack delay
* value specified in spp_sackdelay.
* SPP_SACKDELAY_DISABLE - Setting this flag turns
* off delayed sack. If the spp_address field is blank then
* delayed sack is disabled for the entire association. Note
* also that this field is mutually exclusive to
* SPP_SACKDELAY_ENABLE, setting both will have undefined
* results.
*/
static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
char __user *optval, int __user *optlen)
char __user *optval, int __user *optlen)
{
struct sctp_paddrparams params;
struct sctp_transport *trans;
struct sctp_paddrparams params;
struct sctp_transport *trans = NULL;
struct sctp_association *asoc = NULL;
struct sctp_sock *sp = sctp_sk(sk);
if (len != sizeof(struct sctp_paddrparams))
return -EINVAL;
if (copy_from_user(&params, optval, len))
return -EFAULT;
/* If no association id is specified retrieve the default value
* for the endpoint that will be used for all future associations
/* If an address other than INADDR_ANY is specified, and
* no transport is found, then the request is invalid.
*/
if (!params.spp_assoc_id &&
sctp_is_any(( union sctp_addr *)&params.spp_address)) {
params.spp_hbinterval = sctp_sk(sk)->paddrparam.spp_hbinterval;
params.spp_pathmaxrxt = sctp_sk(sk)->paddrparam.spp_pathmaxrxt;
goto done;
if (!sctp_is_any(( union sctp_addr *)&params.spp_address)) {
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans) {
SCTP_DEBUG_PRINTK("Failed no transport\n");
return -EINVAL;
}
}
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans)
/* Get association, if assoc_id != 0 and the socket is a one
* to many style socket, and an association was not found, then
* the id was invalid.
*/
asoc = sctp_id2assoc(sk, params.spp_assoc_id);
if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) {
SCTP_DEBUG_PRINTK("Failed no association\n");
return -EINVAL;
}
/* The value of the heartbeat interval, in milliseconds. A value of 0,
* when modifying the parameter, specifies that the heartbeat on this
* address should be disabled.
*/
if (!trans->hb_allowed)
params.spp_hbinterval = 0;
else
params.spp_hbinterval = jiffies_to_msecs(trans->hb_interval);
if (trans) {
/* Fetch transport values. */
params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
params.spp_pathmtu = trans->pathmtu;
params.spp_pathmaxrxt = trans->pathmaxrxt;
params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
/* spp_pathmaxrxt contains the maximum number of retransmissions
* before this address shall be considered unreachable.
*/
params.spp_pathmaxrxt = trans->max_retrans;
/*draft-11 doesn't say what to return in spp_flags*/
params.spp_flags = trans->param_flags;
} else if (asoc) {
/* Fetch association values. */
params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
params.spp_pathmtu = asoc->pathmtu;
params.spp_pathmaxrxt = asoc->pathmaxrxt;
params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
/*draft-11 doesn't say what to return in spp_flags*/
params.spp_flags = asoc->param_flags;
} else {
/* Fetch socket values. */
params.spp_hbinterval = sp->hbinterval;
params.spp_pathmtu = sp->pathmtu;
params.spp_sackdelay = sp->sackdelay;
params.spp_pathmaxrxt = sp->pathmaxrxt;
/*draft-11 doesn't say what to return in spp_flags*/
params.spp_flags = sp->param_flags;
}
done:
if (copy_to_user(optval, &params, len))
return -EFAULT;

32
net/sctp/transport.c
View File

@ -86,10 +86,13 @@ static struct sctp_transport *sctp_transport_init(struct sctp_transport *peer,
peer->init_sent_count = 0;
peer->state = SCTP_ACTIVE;
peer->hb_allowed = 0;
peer->param_flags = SPP_HB_DISABLE |
SPP_PMTUD_ENABLE |
SPP_SACKDELAY_ENABLE;
peer->hbinterval = 0;
/* Initialize the default path max_retrans. */
peer->max_retrans = sctp_max_retrans_path;
peer->pathmaxrxt = sctp_max_retrans_path;
peer->error_count = 0;
INIT_LIST_HEAD(&peer->transmitted);
@ -229,10 +232,10 @@ void sctp_transport_pmtu(struct sctp_transport *transport)
dst = transport->af_specific->get_dst(NULL, &transport->ipaddr, NULL);
if (dst) {
transport->pmtu = dst_mtu(dst);
transport->pathmtu = dst_mtu(dst);
dst_release(dst);
} else
transport->pmtu = SCTP_DEFAULT_MAXSEGMENT;
transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
/* Caches the dst entry and source address for a transport's destination
@ -254,8 +257,11 @@ void sctp_transport_route(struct sctp_transport *transport,
af->get_saddr(asoc, dst, daddr, &transport->saddr);
transport->dst = dst;
if ((transport->param_flags & SPP_PMTUD_DISABLE) && transport->pathmtu) {
return;
}
if (dst) {
transport->pmtu = dst_mtu(dst);
transport->pathmtu = dst_mtu(dst);
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().
@ -264,7 +270,7 @@ void sctp_transport_route(struct sctp_transport *transport,
opt->pf->af->to_sk_saddr(&transport->saddr,
asoc->base.sk);
} else
transport->pmtu = SCTP_DEFAULT_MAXSEGMENT;
transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
/* Hold a reference to a transport. */
@ -369,7 +375,7 @@ void sctp_transport_raise_cwnd(struct sctp_transport *transport,
ssthresh = transport->ssthresh;
pba = transport->partial_bytes_acked;
pmtu = transport->asoc->pmtu;
pmtu = transport->asoc->pathmtu;
if (cwnd <= ssthresh) {
/* RFC 2960 7.2.1, sctpimpguide-05 2.14.2 When cwnd is less
@ -441,8 +447,8 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
* partial_bytes_acked = 0
*/
transport->ssthresh = max(transport->cwnd/2,
4*transport->asoc->pmtu);
transport->cwnd = transport->asoc->pmtu;
4*transport->asoc->pathmtu);
transport->cwnd = transport->asoc->pathmtu;
break;
case SCTP_LOWER_CWND_FAST_RTX:
@ -459,7 +465,7 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
* partial_bytes_acked = 0
*/
transport->ssthresh = max(transport->cwnd/2,
4*transport->asoc->pmtu);
4*transport->asoc->pathmtu);
transport->cwnd = transport->ssthresh;
break;
@ -479,7 +485,7 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
if ((jiffies - transport->last_time_ecne_reduced) >
transport->rtt) {
transport->ssthresh = max(transport->cwnd/2,
4*transport->asoc->pmtu);
4*transport->asoc->pathmtu);
transport->cwnd = transport->ssthresh;
transport->last_time_ecne_reduced = jiffies;
}
@ -496,7 +502,7 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
*/
if ((jiffies - transport->last_time_used) > transport->rto)
transport->cwnd = max(transport->cwnd/2,
4*transport->asoc->pmtu);
4*transport->asoc->pathmtu);
break;
};
@ -511,7 +517,7 @@ void sctp_transport_lower_cwnd(struct sctp_transport *transport,
unsigned long sctp_transport_timeout(struct sctp_transport *t)
{
unsigned long timeout;
timeout = t->hb_interval + t->rto + sctp_jitter(t->rto);
timeout = t->hbinterval + t->rto + sctp_jitter(t->rto);
timeout += jiffies;
return timeout;
}