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Commit f5633ef0 authored by Jon Grimm's avatar Jon Grimm
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Hand merge.

parents 58acfd93 ec7bf6c1
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Showing with 808 additions and 376 deletions
include/net/sctp/sctp.h
View file @ f5633ef0
......@@ -119,12 +119,10 @@
*/
/*
* sctp_protocol.c
* sctp/protocol.c
*/
extern struct sctp_protocol sctp_proto;
extern struct sock *sctp_get_ctl_sock(void);
extern int sctp_copy_local_addr_list(struct sctp_protocol *,
struct sctp_bind_addr *,
extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
sctp_scope_t, int gfp, int flags);
extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
......@@ -275,6 +273,7 @@ extern atomic_t sctp_dbg_objcnt_assoc;
extern atomic_t sctp_dbg_objcnt_transport;
extern atomic_t sctp_dbg_objcnt_chunk;
extern atomic_t sctp_dbg_objcnt_bind_addr;
extern atomic_t sctp_dbg_objcnt_bind_bucket;
extern atomic_t sctp_dbg_objcnt_addr;
extern atomic_t sctp_dbg_objcnt_ssnmap;
extern atomic_t sctp_dbg_objcnt_datamsg;
......@@ -418,6 +417,10 @@ static inline __s32 sctp_jitter(__u32 rto)
static __u32 sctp_rand;
__s32 ret;
/* Avoid divide by zero. */
if (!rto)
rto = 1;
sctp_rand += jiffies;
sctp_rand ^= (sctp_rand << 12);
sctp_rand ^= (sctp_rand >> 20);
......@@ -448,7 +451,7 @@ static inline int sctp_frag_point(const struct sctp_opt *sp, int pmtu)
* there is room for a param header too.
*/
#define sctp_walk_params(pos, chunk, member)\
_sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member)
_sctp_walk_params((pos), (chunk), WORD_ROUND(ntohs((chunk)->chunk_hdr.length)), member)
#define _sctp_walk_params(pos, chunk, end, member)\
for (pos.v = chunk->member;\
......@@ -456,6 +459,18 @@ for (pos.v = chunk->member;\
pos.v <= (void *)chunk + end - WORD_ROUND(ntohs(pos.p->length)); \
pos.v += WORD_ROUND(ntohs(pos.p->length)))
#define sctp_walk_errors(err, chunk_hdr)\
_sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
#define _sctp_walk_errors(err, chunk_hdr, end)\
for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
sizeof(sctp_chunkhdr_t));\
(void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
(void *)err <= (void *)chunk_hdr + end - \
WORD_ROUND(ntohs(err->length));\
err = (sctp_errhdr_t *)((void *)err + \
WORD_ROUND(ntohs(err->length))))
/* Round an int up to the next multiple of 4. */
#define WORD_ROUND(s) (((s)+3)&~3)
......@@ -491,12 +506,6 @@ void sctp_put_port(struct sock *sk);
/* Static inline functions. */
/* Return the SCTP protocol structure. */
static inline struct sctp_protocol *sctp_get_protocol(void)
{
return &sctp_proto;
}
/* Convert from an IP version number to an Address Family symbol. */
static inline int ipver2af(__u8 ipver)
{
......@@ -524,24 +533,21 @@ static inline int sctp_sanity_check(void)
/* This is the hash function for the SCTP port hash table. */
static inline int sctp_phashfn(__u16 lport)
{
struct sctp_protocol *sctp_proto = sctp_get_protocol();
return (lport & (sctp_proto->port_hashsize - 1));
return (lport & (sctp_port_hashsize - 1));
}
/* This is the hash function for the endpoint hash table. */
static inline int sctp_ep_hashfn(__u16 lport)
{
struct sctp_protocol *sctp_proto = sctp_get_protocol();
return (lport & (sctp_proto->ep_hashsize - 1));
return (lport & (sctp_ep_hashsize - 1));
}
/* This is the hash function for the association hash table. */
static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
{
struct sctp_protocol *sctp_proto = sctp_get_protocol();
int h = (lport << 16) + rport;
h ^= h>>8;
return (h & (sctp_proto->assoc_hashsize - 1));
return (h & (sctp_assoc_hashsize - 1));
}
/* This is the hash function for the association hash table. This is
......@@ -550,10 +556,9 @@ static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
*/
static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
{
struct sctp_protocol *sctp_proto = sctp_get_protocol();
int h = (lport << 16) + rport;
h ^= vtag;
return (h & (sctp_proto->assoc_hashsize-1));
return (h & (sctp_assoc_hashsize-1));
}
/* WARNING: Do not change the layout of the members in sctp_sock! */
......
include/net/sctp/structs.h
View file @ f5633ef0
......@@ -71,7 +71,7 @@ union sctp_addr {
};
/* Forward declarations for data structures. */
struct sctp_protocol;
struct sctp_globals;
struct sctp_endpoint;
struct sctp_association;
struct sctp_transport;
......@@ -92,28 +92,28 @@ struct sctp_ssnmap;
/* Structures useful for managing bind/connect. */
typedef struct sctp_bind_bucket {
struct sctp_bind_bucket {
unsigned short port;
unsigned short fastreuse;
struct sctp_bind_bucket *next;
struct sctp_bind_bucket **pprev;
struct sock *sk;
} sctp_bind_bucket_t;
};
typedef struct sctp_bind_hashbucket {
struct sctp_bind_hashbucket {
spinlock_t lock;
struct sctp_bind_bucket *chain;
} sctp_bind_hashbucket_t;
};
/* Used for hashing all associations. */
typedef struct sctp_hashbucket {
struct sctp_hashbucket {
rwlock_t lock;
struct sctp_ep_common *chain;
} sctp_hashbucket_t __attribute__((__aligned__(8)));
} __attribute__((__aligned__(8)));
/* The SCTP protocol structure. */
struct sctp_protocol {
/* The SCTP globals structure. */
extern struct sctp_globals {
/* RFC2960 Section 14. Suggested SCTP Protocol Parameter Values
*
* The following protocol parameters are RECOMMENDED:
......@@ -167,17 +167,17 @@ struct sctp_protocol {
/* This is the hash of all endpoints. */
int ep_hashsize;
sctp_hashbucket_t *ep_hashbucket;
struct sctp_hashbucket *ep_hashbucket;
/* This is the hash of all associations. */
int assoc_hashsize;
sctp_hashbucket_t *assoc_hashbucket;
struct sctp_hashbucket *assoc_hashbucket;
/* This is the sctp port control hash. */
int port_hashsize;
int port_rover;
spinlock_t port_alloc_lock; /* Protects port_rover. */
sctp_bind_hashbucket_t *port_hashtable;
struct sctp_bind_hashbucket *port_hashtable;
/* This is the global local address list.
* We actively maintain this complete list of interfaces on
......@@ -187,8 +187,33 @@ struct sctp_protocol {
*/
struct list_head local_addr_list;
spinlock_t local_addr_lock;
};
} sctp_globals;
#define sctp_rto_initial (sctp_globals.rto_initial)
#define sctp_rto_min (sctp_globals.rto_min)
#define sctp_rto_max (sctp_globals.rto_max)
#define sctp_rto_alpha (sctp_globals.rto_alpha)
#define sctp_rto_beta (sctp_globals.rto_beta)
#define sctp_max_burst (sctp_globals.max_burst)
#define sctp_valid_cookie_life (sctp_globals.valid_cookie_life)
#define sctp_cookie_preserve_enable (sctp_globals.cookie_preserve_enable)
#define sctp_max_retrans_association (sctp_globals.max_retrans_association)
#define sctp_max_retrans_path (sctp_globals.max_retrans_path)
#define sctp_max_retrans_init (sctp_globals.max_retrans_init)
#define sctp_hb_interval (sctp_globals.hb_interval)
#define sctp_max_instreams (sctp_globals.max_instreams)
#define sctp_max_outstreams (sctp_globals.max_outstreams)
#define sctp_address_families (sctp_globals.address_families)
#define sctp_ep_hashsize (sctp_globals.ep_hashsize)
#define sctp_ep_hashbucket (sctp_globals.ep_hashbucket)
#define sctp_assoc_hashsize (sctp_globals.assoc_hashsize)
#define sctp_assoc_hashbucket (sctp_globals.assoc_hashbucket)
#define sctp_port_hashsize (sctp_globals.port_hashsize)
#define sctp_port_rover (sctp_globals.port_rover)
#define sctp_port_alloc_lock (sctp_globals.port_alloc_lock)
#define sctp_port_hashtable (sctp_globals.port_hashtable)
#define sctp_local_addr_list (sctp_globals.local_addr_list)
#define sctp_local_addr_lock (sctp_globals.local_addr_lock)
/*
* Pointers to address related SCTP functions.
......@@ -239,7 +264,9 @@ struct sctp_af {
int (*is_any) (const union sctp_addr *);
int (*available) (const union sctp_addr *);
int (*skb_iif) (const struct sk_buff *sk);
int (*is_ce) (const struct sk_buff *sk);
int (*is_ce) (const struct sk_buff *sk);
void (*seq_dump_addr)(struct seq_file *seq,
union sctp_addr *addr);
__u16 net_header_len;
int sockaddr_len;
sa_family_t sa_family;
......@@ -289,6 +316,10 @@ struct sctp_opt {
/* Various Socket Options. */
__u16 default_stream;
__u32 default_ppid;
__u16 default_flags;
__u32 default_context;
__u32 default_timetolive;
struct sctp_initmsg initmsg;
struct sctp_rtoinfo rtoinfo;
struct sctp_paddrparams paddrparam;
......@@ -461,7 +492,7 @@ struct sctp_datamsg {
/* Reference counting. */
atomic_t refcnt;
/* When is this message no longer interesting to the peer? */
unsigned long expires_at;
unsigned long expires_at;
/* Did the messenge fail to send? */
int send_error;
char send_failed;
......@@ -1492,13 +1523,12 @@ struct sctp_association {
*/
int counters[SCTP_NUMBER_COUNTERS];
struct {
__u16 stream;
__u16 flags;
__u32 ppid;
__u32 context;
__u32 timetolive;
} defaults;
/* Default send parameters. */
__u16 default_stream;
__u16 default_flags;
__u32 default_ppid;
__u32 default_context;
__u32 default_timetolive;
/* This tracks outbound ssn for a given stream. */
struct sctp_ssnmap *ssnmap;
......
include/net/sctp/user.h
View file @ f5633ef0
......@@ -485,6 +485,11 @@ struct sctp_paddrinfo {
__u32 spinfo_mtu;
};
/* Peer addresses's state. */
enum sctp_spinfo_state {
SCTP_INACTIVE,
SCTP_ACTIVE,
};
/*
* 7.1.1 Retransmission Timeout Parameters (SCTP_RTOINFO)
......
net/sctp/associola.c
View file @ f5633ef0
......@@ -96,7 +96,6 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
int gfp)
{
struct sctp_opt *sp;
struct sctp_protocol *proto = sctp_get_protocol();
int i;
/* Retrieve the SCTP per socket area. */
......@@ -129,26 +128,26 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
asoc->state_timestamp = jiffies;
/* Set things that have constant value. */
asoc->cookie_life.tv_sec = sctp_proto.valid_cookie_life / HZ;
asoc->cookie_life.tv_usec = (sctp_proto.valid_cookie_life % HZ) *
asoc->cookie_life.tv_sec = sctp_valid_cookie_life / HZ;
asoc->cookie_life.tv_usec = (sctp_valid_cookie_life % HZ) *
1000000L / HZ;
asoc->pmtu = 0;
asoc->frag_point = 0;
/* Initialize the default association max_retrans and RTO values. */
asoc->max_retrans = proto->max_retrans_association;
asoc->rto_initial = proto->rto_initial;
asoc->rto_max = proto->rto_max;
asoc->rto_min = proto->rto_min;
asoc->max_retrans = sctp_max_retrans_association;
asoc->rto_initial = sctp_rto_initial;
asoc->rto_max = sctp_rto_max;
asoc->rto_min = sctp_rto_min;
asoc->overall_error_threshold = 0;
asoc->overall_error_threshold = asoc->max_retrans;
asoc->overall_error_count = 0;
/* Initialize the maximum mumber of new data packets that can be sent
* in a burst.
*/
asoc->max_burst = proto->max_burst;
asoc->max_burst = sctp_max_burst;
/* Copy things from the endpoint. */
for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i) {
......@@ -277,6 +276,12 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
asoc->autoclose = sp->autoclose;
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;
return asoc;
fail_init:
......@@ -478,16 +483,8 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
peer->partial_bytes_acked = 0;
peer->flight_size = 0;
peer->error_threshold = peer->max_retrans;
/* Update the overall error threshold value of the association
* taking the new peer's error threshold into account.
*/
asoc->overall_error_threshold =
min(asoc->overall_error_threshold + peer->error_threshold,
asoc->max_retrans);
/* By default, enable heartbeat for peer address. */
peer->hb_allowed = 1;
......@@ -550,12 +547,12 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
/* Record the transition on the transport. */
switch (command) {
case SCTP_TRANSPORT_UP:
transport->active = 1;
transport->active = SCTP_ACTIVE;
spc_state = ADDRESS_AVAILABLE;
break;
case SCTP_TRANSPORT_DOWN:
transport->active = 0;
transport->active = SCTP_INACTIVE;
spc_state = ADDRESS_UNREACHABLE;
break;
......
net/sctp/bind_addr.c
View file @ f5633ef0
......@@ -329,12 +329,10 @@ static int sctp_copy_one_addr(struct sctp_bind_addr *dest,
union sctp_addr *addr,
sctp_scope_t scope, int gfp, int flags)
{
struct sctp_protocol *proto = sctp_get_protocol();
int error = 0;
if (sctp_is_any(addr)) {
error = sctp_copy_local_addr_list(proto, dest, scope,
gfp, flags);
error = sctp_copy_local_addr_list(dest, scope, gfp, flags);
} else if (sctp_in_scope(addr, scope)) {
/* Now that the address is in scope, check to see if
* the address type is supported by local sock as
......
net/sctp/input.c
View file @ f5633ef0
......@@ -503,9 +503,10 @@ int sctp_rcv_ootb(struct sk_buff *skb)
goto discard;
if (SCTP_CID_ERROR == ch->type) {
err = (sctp_errhdr_t *)(ch + sizeof(sctp_chunkhdr_t));
if (SCTP_ERROR_STALE_COOKIE == err->cause)
goto discard;
sctp_walk_errors(err, ch) {
if (SCTP_ERROR_STALE_COOKIE == err->cause)
goto discard;
}
}
ch = (sctp_chunkhdr_t *) ch_end;
......@@ -522,12 +523,12 @@ void __sctp_hash_endpoint(struct sctp_endpoint *ep)
{
struct sctp_ep_common **epp;
struct sctp_ep_common *epb;
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
epb = &ep->base;
epb->hashent = sctp_ep_hashfn(epb->bind_addr.port);
head = &sctp_proto.ep_hashbucket[epb->hashent];
head = &sctp_ep_hashbucket[epb->hashent];
sctp_write_lock(&head->lock);
epp = &head->chain;
......@@ -550,14 +551,14 @@ void sctp_hash_endpoint(struct sctp_endpoint *ep)
/* Remove endpoint from the hash table. */
void __sctp_unhash_endpoint(struct sctp_endpoint *ep)
{
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
epb = &ep->base;
epb->hashent = sctp_ep_hashfn(epb->bind_addr.port);
head = &sctp_proto.ep_hashbucket[epb->hashent];
head = &sctp_ep_hashbucket[epb->hashent];
sctp_write_lock(&head->lock);
......@@ -582,13 +583,13 @@ void sctp_unhash_endpoint(struct sctp_endpoint *ep)
/* Look up an endpoint. */
struct sctp_endpoint *__sctp_rcv_lookup_endpoint(const union sctp_addr *laddr)
{
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
struct sctp_endpoint *ep;
int hash;
hash = sctp_ep_hashfn(laddr->v4.sin_port);
head = &sctp_proto.ep_hashbucket[hash];
head = &sctp_ep_hashbucket[hash];
read_lock(&head->lock);
for (epb = head->chain; epb; epb = epb->next) {
ep = sctp_ep(epb);
......@@ -619,14 +620,14 @@ void __sctp_hash_established(struct sctp_association *asoc)
{
struct sctp_ep_common **epp;
struct sctp_ep_common *epb;
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
epb = &asoc->base;
/* Calculate which chain this entry will belong to. */
epb->hashent = sctp_assoc_hashfn(epb->bind_addr.port, asoc->peer.port);
head = &sctp_proto.assoc_hashbucket[epb->hashent];
head = &sctp_assoc_hashbucket[epb->hashent];
sctp_write_lock(&head->lock);
epp = &head->chain;
......@@ -649,7 +650,7 @@ void sctp_unhash_established(struct sctp_association *asoc)
/* Remove association from the hash table. */
void __sctp_unhash_established(struct sctp_association *asoc)
{
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
epb = &asoc->base;
......@@ -657,7 +658,7 @@ void __sctp_unhash_established(struct sctp_association *asoc)
epb->hashent = sctp_assoc_hashfn(epb->bind_addr.port,
asoc->peer.port);
head = &sctp_proto.assoc_hashbucket[epb->hashent];
head = &sctp_assoc_hashbucket[epb->hashent];
sctp_write_lock(&head->lock);
......@@ -677,7 +678,7 @@ struct sctp_association *__sctp_lookup_association(
const union sctp_addr *peer,
struct sctp_transport **pt)
{
sctp_hashbucket_t *head;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
struct sctp_association *asoc;
struct sctp_transport *transport;
......@@ -687,7 +688,7 @@ struct sctp_association *__sctp_lookup_association(
* have wildcards anyways.
*/
hash = sctp_assoc_hashfn(local->v4.sin_port, peer->v4.sin_port);
head = &sctp_proto.assoc_hashbucket[hash];
head = &sctp_assoc_hashbucket[hash];
read_lock(&head->lock);
for (epb = head->chain; epb; epb = epb->next) {
asoc = sctp_assoc(epb);
......@@ -766,6 +767,7 @@ static struct sctp_association *__sctp_rcv_init_lookup(struct sk_buff *skb,
sctp_chunkhdr_t *ch;
union sctp_params params;
sctp_init_chunk_t *init;
struct sctp_transport *transport;
ch = (sctp_chunkhdr_t *) skb->data;
......@@ -805,7 +807,7 @@ static struct sctp_association *__sctp_rcv_init_lookup(struct sk_buff *skb,
continue;
sctp_param2sockaddr(paddr, params.addr, ntohs(sh->source), 0);
asoc = __sctp_lookup_association(laddr, paddr, transportp);
asoc = __sctp_lookup_association(laddr, paddr, &transport);
if (asoc)
return asoc;
}
......
net/sctp/ipv6.c
View file @ f5633ef0
......@@ -61,6 +61,7 @@
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/random.h>
#include <linux/seq_file.h>
#include <net/protocol.h>
#include <net/tcp.h>
......@@ -578,6 +579,13 @@ static int sctp_v6_is_ce(const struct sk_buff *skb)
return *((__u32 *)(skb->nh.ipv6h)) & htonl(1<<20);
}
/* Dump the v6 addr to the seq file. */
static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
{
seq_printf(seq, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x ",
NIP6(addr->v6.sin6_addr));
}
/* Initialize a PF_INET6 socket msg_name. */
static void sctp_inet6_msgname(char *msgname, int *addr_len)
{
......@@ -840,6 +848,7 @@ static struct sctp_af sctp_ipv6_specific = {
.available = sctp_v6_available,
.skb_iif = sctp_v6_skb_iif,
.is_ce = sctp_v6_is_ce,
.seq_dump_addr = sctp_v6_seq_dump_addr,
.net_header_len = sizeof(struct ipv6hdr),
.sockaddr_len = sizeof(struct sockaddr_in6),
.sa_family = AF_INET6,
......
net/sctp/objcnt.c
View file @ f5633ef0
......@@ -53,6 +53,7 @@ SCTP_DBG_OBJCNT(ep);
SCTP_DBG_OBJCNT(transport);
SCTP_DBG_OBJCNT(assoc);
SCTP_DBG_OBJCNT(bind_addr);
SCTP_DBG_OBJCNT(bind_bucket);
SCTP_DBG_OBJCNT(chunk);
SCTP_DBG_OBJCNT(addr);
SCTP_DBG_OBJCNT(ssnmap);
......@@ -68,6 +69,7 @@ sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
SCTP_DBG_OBJCNT_ENTRY(transport),
SCTP_DBG_OBJCNT_ENTRY(chunk),
SCTP_DBG_OBJCNT_ENTRY(bind_addr),
SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
SCTP_DBG_OBJCNT_ENTRY(addr),
SCTP_DBG_OBJCNT_ENTRY(ssnmap),
SCTP_DBG_OBJCNT_ENTRY(datamsg),
......
net/sctp/proc.c
View file @ f5633ef0
......@@ -128,3 +128,162 @@ void sctp_snmp_proc_exit(void)
{
remove_proc_entry("snmp", proc_net_sctp);
}
/* Dump local addresses of an association/endpoint. */
static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
{
struct list_head *pos;
struct sockaddr_storage_list *laddr;
union sctp_addr *addr;
struct sctp_af *af;
list_for_each(pos, &epb->bind_addr.address_list) {
laddr = list_entry(pos, struct sockaddr_storage_list, list);
addr = (union sctp_addr *)&laddr->a;
af = sctp_get_af_specific(addr->sa.sa_family);
af->seq_dump_addr(seq, addr);
}
}
/* Dump remote addresses of an association. */
static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
{
struct list_head *pos;
struct sctp_transport *transport;
union sctp_addr *addr;
struct sctp_af *af;
list_for_each(pos, &assoc->peer.transport_addr_list) {
transport = list_entry(pos, struct sctp_transport, transports);
addr = (union sctp_addr *)&transport->ipaddr;
af = sctp_get_af_specific(addr->sa.sa_family);
af->seq_dump_addr(seq, addr);
}
}
/* Display sctp endpoints (/proc/net/sctp/eps). */
static int sctp_eps_seq_show(struct seq_file *seq, void *v)
{
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
struct sctp_endpoint *ep;
struct sock *sk;
int hash;
seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT LADDRS\n");
for (hash = 0; hash < sctp_ep_hashsize; hash++) {
head = &sctp_ep_hashbucket[hash];
read_lock(&head->lock);
for (epb = head->chain; epb; epb = epb->next) {
ep = sctp_ep(epb);
sk = epb->sk;
seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d ", ep, sk,
sctp_sk(sk)->type, sk->state, hash,
epb->bind_addr.port);
sctp_seq_dump_local_addrs(seq, epb);
seq_printf(seq, "\n");
}
read_unlock(&head->lock);
}
return 0;
}
/* Initialize the seq file operations for 'eps' object. */
static int sctp_eps_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, sctp_eps_seq_show, NULL);
}
static struct file_operations sctp_eps_seq_fops = {
.open = sctp_eps_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* Set up the proc fs entry for 'eps' object. */
int __init sctp_eps_proc_init(void)
{
struct proc_dir_entry *p;
p = create_proc_entry("eps", S_IRUGO, proc_net_sctp);
if (!p)
return -ENOMEM;
p->proc_fops = &sctp_eps_seq_fops;
return 0;
}
/* Cleanup the proc fs entry for 'eps' object. */
void sctp_eps_proc_exit(void)
{
remove_proc_entry("eps", proc_net_sctp);
}
/* Display sctp associations (/proc/net/sctp/assocs). */
static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
{
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
struct sctp_association *assoc;
struct sock *sk;
int hash;
seq_printf(seq, " ASSOC SOCK STY SST ST HBKT LPORT RPORT "
"LADDRS <-> RADDRS\n");
for (hash = 0; hash < sctp_assoc_hashsize; hash++) {
head = &sctp_assoc_hashbucket[hash];
read_lock(&head->lock);
for (epb = head->chain; epb; epb = epb->next) {
assoc = sctp_assoc(epb);
sk = epb->sk;
seq_printf(seq,
"%8p %8p %-3d %-3d %-2d %-4d %-5d %-5d ",
assoc, sk, sctp_sk(sk)->type, sk->state,
assoc->state, hash, epb->bind_addr.port,
assoc->peer.port);
sctp_seq_dump_local_addrs(seq, epb);
seq_printf(seq, "<-> ");
sctp_seq_dump_remote_addrs(seq, assoc);
seq_printf(seq, "\n");
}
read_unlock(&head->lock);
}
return 0;
}
/* Initialize the seq file operations for 'assocs' object. */
static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, sctp_assocs_seq_show, NULL);
}
static struct file_operations sctp_assocs_seq_fops = {
.open = sctp_assocs_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* Set up the proc fs entry for 'assocs' object. */
int __init sctp_assocs_proc_init(void)
{
struct proc_dir_entry *p;
p = create_proc_entry("assocs", S_IRUGO, proc_net_sctp);
if (!p)
return -ENOMEM;
p->proc_fops = &sctp_assocs_seq_fops;
return 0;
}
/* Cleanup the proc fs entry for 'assocs' object. */
void sctp_assocs_proc_exit(void)
{
remove_proc_entry("assocs", proc_net_sctp);
}
net/sctp/protocol.c
View file @ f5633ef0
/* SCTP kernel reference Implementation
* Copyright (c) 1999-2000 Cisco, Inc.
* Copyright (c) 1999-2001 Motorola, Inc.
* Copyright (c) 2001-2002 International Business Machines, Corp.
* Copyright (c) 2001-2003 International Business Machines, Corp.
* Copyright (c) 2001 Intel Corp.
* Copyright (c) 2001 Nokia, Inc.
* Copyright (c) 2001 La Monte H.P. Yarroll
......@@ -50,6 +50,7 @@
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/seq_file.h>
#include <net/protocol.h>
#include <net/ip.h>
#include <net/ipv6.h>
......@@ -59,7 +60,7 @@
#include <net/inet_ecn.h>
/* Global data structures. */
struct sctp_protocol sctp_proto;
struct sctp_globals sctp_globals;
struct proc_dir_entry *proc_net_sctp;
DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics);
......@@ -74,10 +75,17 @@ static struct sctp_pf *sctp_pf_inet_specific;
static struct sctp_af *sctp_af_v4_specific;
static struct sctp_af *sctp_af_v6_specific;
kmem_cache_t *sctp_chunk_cachep;
kmem_cache_t *sctp_bucket_cachep;
extern struct net_proto_family inet_family_ops;
extern int sctp_snmp_proc_init(void);
extern int sctp_snmp_proc_exit(void);
extern int sctp_eps_proc_init(void);
extern int sctp_eps_proc_exit(void);
extern int sctp_assocs_proc_init(void);
extern int sctp_assocs_proc_exit(void);
/* Return the address of the control sock. */
struct sock *sctp_get_ctl_sock(void)
......@@ -88,8 +96,6 @@ struct sock *sctp_get_ctl_sock(void)
/* Set up the proc fs entry for the SCTP protocol. */
__init int sctp_proc_init(void)
{
int rc = 0;
if (!proc_net_sctp) {
struct proc_dir_entry *ent;
ent = proc_mkdir("net/sctp", 0);
......@@ -97,20 +103,31 @@ __init int sctp_proc_init(void)
ent->owner = THIS_MODULE;
proc_net_sctp = ent;
} else
rc = -ENOMEM;
goto out_nomem;
}
if (sctp_snmp_proc_init())
rc = -ENOMEM;
goto out_nomem;
if (sctp_eps_proc_init())
goto out_nomem;
if (sctp_assocs_proc_init())
goto out_nomem;
return 0;
return rc;
out_nomem:
return -ENOMEM;
}
/* Clean up the proc fs entry for the SCTP protocol. */
/* Clean up the proc fs entry for the SCTP protocol.
* Note: Do not make this __exit as it is used in the init error
* path.
*/
void sctp_proc_exit(void)
{
sctp_snmp_proc_exit();
sctp_eps_proc_exit();
sctp_assocs_proc_exit();
if (proc_net_sctp) {
proc_net_sctp = NULL;
......@@ -153,7 +170,7 @@ static void sctp_v4_copy_addrlist(struct list_head *addrlist,
/* Extract our IP addresses from the system and stash them in the
* protocol structure.
*/
static void __sctp_get_local_addr_list(struct sctp_protocol *proto)
static void __sctp_get_local_addr_list(void)
{
struct net_device *dev;
struct list_head *pos;
......@@ -161,30 +178,30 @@ static void __sctp_get_local_addr_list(struct sctp_protocol *proto)
read_lock(&dev_base_lock);
for (dev = dev_base; dev; dev = dev->next) {
list_for_each(pos, &proto->address_families) {
__list_for_each(pos, &sctp_address_families) {
af = list_entry(pos, struct sctp_af, list);
af->copy_addrlist(&proto->local_addr_list, dev);
af->copy_addrlist(&sctp_local_addr_list, dev);
}
}
read_unlock(&dev_base_lock);
}
static void sctp_get_local_addr_list(struct sctp_protocol *proto)
static void sctp_get_local_addr_list(void)
{
unsigned long flags;
sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags);
__sctp_get_local_addr_list(&sctp_proto);
sctp_spin_unlock_irqrestore(&sctp_proto.local_addr_lock, flags);
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
__sctp_get_local_addr_list();
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
}
/* Free the existing local addresses. */
static void __sctp_free_local_addr_list(struct sctp_protocol *proto)
static void __sctp_free_local_addr_list(void)
{
struct sockaddr_storage_list *addr;
struct list_head *pos, *temp;
list_for_each_safe(pos, temp, &proto->local_addr_list) {
list_for_each_safe(pos, temp, &sctp_local_addr_list) {
addr = list_entry(pos, struct sockaddr_storage_list, list);
list_del(pos);
kfree(addr);
......@@ -192,18 +209,17 @@ static void __sctp_free_local_addr_list(struct sctp_protocol *proto)
}
/* Free the existing local addresses. */
static void sctp_free_local_addr_list(struct sctp_protocol *proto)
static void sctp_free_local_addr_list(void)
{
unsigned long flags;
sctp_spin_lock_irqsave(&proto->local_addr_lock, flags);
__sctp_free_local_addr_list(proto);
sctp_spin_unlock_irqrestore(&proto->local_addr_lock, flags);
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
__sctp_free_local_addr_list();
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
}
/* Copy the local addresses which are valid for 'scope' into 'bp'. */
int sctp_copy_local_addr_list(struct sctp_protocol *proto,
struct sctp_bind_addr *bp, sctp_scope_t scope,
int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
int gfp, int copy_flags)
{
struct sockaddr_storage_list *addr;
......@@ -211,8 +227,8 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto,
struct list_head *pos;
unsigned long flags;
sctp_spin_lock_irqsave(&proto->local_addr_lock, flags);
list_for_each(pos, &proto->local_addr_list) {
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
list_for_each(pos, &sctp_local_addr_list) {
addr = list_entry(pos, struct sockaddr_storage_list, list);
if (sctp_in_scope(&addr->a, scope)) {
/* Now that the address is in scope, check to see if
......@@ -233,7 +249,7 @@ int sctp_copy_local_addr_list(struct sctp_protocol *proto,
}
end_copy:
sctp_spin_unlock_irqrestore(&proto->local_addr_lock, flags);
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
return error;
}
......@@ -564,6 +580,12 @@ struct sock *sctp_v4_create_accept_sk(struct sock *sk,
return newsk;
}
/* Dump the v4 addr to the seq file. */
static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
{
seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
}
/* Event handler for inet address addition/deletion events.
* Basically, whenever there is an event, we re-build our local address list.
*/
......@@ -572,10 +594,10 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
{
unsigned long flags;
sctp_spin_lock_irqsave(&sctp_proto.local_addr_lock, flags);
__sctp_free_local_addr_list(&sctp_proto);
__sctp_get_local_addr_list(&sctp_proto);
sctp_spin_unlock_irqrestore(&sctp_proto.local_addr_lock, flags);
sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
__sctp_free_local_addr_list();
__sctp_get_local_addr_list();
sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
return NOTIFY_DONE;
}
......@@ -626,7 +648,7 @@ int sctp_register_af(struct sctp_af *af)
}
INIT_LIST_HEAD(&af->list);
list_add_tail(&af->list, &sctp_proto.address_families);
list_add_tail(&af->list, &sctp_address_families);
return 1;
}
......@@ -839,6 +861,7 @@ struct sctp_af sctp_ipv4_specific = {
.scope = sctp_v4_scope,
.skb_iif = sctp_v4_skb_iif,
.is_ce = sctp_v4_is_ce,
.seq_dump_addr = sctp_v4_seq_dump_addr,
.net_header_len = sizeof(struct iphdr),
.sockaddr_len = sizeof(struct sockaddr_in),
.sa_family = AF_INET,
......@@ -914,6 +937,22 @@ __init int sctp_init(void)
inet_register_protosw(&sctp_seqpacket_protosw);
inet_register_protosw(&sctp_stream_protosw);
/* Allocate a cache pools. */
sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
sizeof(struct sctp_bind_bucket),
0, SLAB_HWCACHE_ALIGN,
NULL, NULL);
if (!sctp_bucket_cachep)
goto err_bucket_cachep;
sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
sizeof(struct sctp_chunk),
0, SLAB_HWCACHE_ALIGN,
NULL, NULL);
if (!sctp_chunk_cachep)
goto err_chunk_cachep;
/* Allocate and initialise sctp mibs. */
status = init_sctp_mibs();
if (status)
......@@ -932,91 +971,91 @@ __init int sctp_init(void)
*/
/* The following protocol parameters are RECOMMENDED: */
/* RTO.Initial - 3 seconds */
sctp_proto.rto_initial = SCTP_RTO_INITIAL;
sctp_rto_initial = SCTP_RTO_INITIAL;
/* RTO.Min - 1 second */
sctp_proto.rto_min = SCTP_RTO_MIN;
sctp_rto_min = SCTP_RTO_MIN;
/* RTO.Max - 60 seconds */
sctp_proto.rto_max = SCTP_RTO_MAX;
sctp_rto_max = SCTP_RTO_MAX;
/* RTO.Alpha - 1/8 */
sctp_proto.rto_alpha = SCTP_RTO_ALPHA;
sctp_rto_alpha = SCTP_RTO_ALPHA;
/* RTO.Beta - 1/4 */
sctp_proto.rto_beta = SCTP_RTO_BETA;
sctp_rto_beta = SCTP_RTO_BETA;
/* Valid.Cookie.Life - 60 seconds */
sctp_proto.valid_cookie_life = 60 * HZ;
sctp_valid_cookie_life = 60 * HZ;
/* Whether Cookie Preservative is enabled(1) or not(0) */
sctp_proto.cookie_preserve_enable = 1;
sctp_cookie_preserve_enable = 1;
/* Max.Burst - 4 */
sctp_proto.max_burst = SCTP_MAX_BURST;
sctp_max_burst = SCTP_MAX_BURST;
/* Association.Max.Retrans - 10 attempts
* Path.Max.Retrans - 5 attempts (per destination address)
* Max.Init.Retransmits - 8 attempts
*/
sctp_proto.max_retrans_association = 10;
sctp_proto.max_retrans_path = 5;
sctp_proto.max_retrans_init = 8;
sctp_max_retrans_association = 10;
sctp_max_retrans_path = 5;
sctp_max_retrans_init = 8;
/* HB.interval - 30 seconds */
sctp_proto.hb_interval = 30 * HZ;
sctp_hb_interval = 30 * HZ;
/* Implementation specific variables. */
/* Initialize default stream count setup information. */
sctp_proto.max_instreams = SCTP_DEFAULT_INSTREAMS;
sctp_proto.max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
/* Allocate and initialize the association hash table. */
sctp_proto.assoc_hashsize = 4096;
sctp_proto.assoc_hashbucket = (sctp_hashbucket_t *)
kmalloc(4096 * sizeof(sctp_hashbucket_t), GFP_KERNEL);
if (!sctp_proto.assoc_hashbucket) {
sctp_assoc_hashsize = 4096;
sctp_assoc_hashbucket = (struct sctp_hashbucket *)
kmalloc(4096 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
if (!sctp_assoc_hashbucket) {
printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
status = -ENOMEM;
goto err_ahash_alloc;
}
for (i = 0; i < sctp_proto.assoc_hashsize; i++) {
sctp_proto.assoc_hashbucket[i].lock = RW_LOCK_UNLOCKED;
sctp_proto.assoc_hashbucket[i].chain = NULL;
for (i = 0; i < sctp_assoc_hashsize; i++) {
sctp_assoc_hashbucket[i].lock = RW_LOCK_UNLOCKED;
sctp_assoc_hashbucket[i].chain = NULL;
}
/* Allocate and initialize the endpoint hash table. */
sctp_proto.ep_hashsize = 64;
sctp_proto.ep_hashbucket = (sctp_hashbucket_t *)
kmalloc(64 * sizeof(sctp_hashbucket_t), GFP_KERNEL);
if (!sctp_proto.ep_hashbucket) {
sctp_ep_hashsize = 64;
sctp_ep_hashbucket = (struct sctp_hashbucket *)
kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
if (!sctp_ep_hashbucket) {
printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
status = -ENOMEM;
goto err_ehash_alloc;
}
for (i = 0; i < sctp_proto.ep_hashsize; i++) {
sctp_proto.ep_hashbucket[i].lock = RW_LOCK_UNLOCKED;
sctp_proto.ep_hashbucket[i].chain = NULL;
for (i = 0; i < sctp_ep_hashsize; i++) {
sctp_ep_hashbucket[i].lock = RW_LOCK_UNLOCKED;
sctp_ep_hashbucket[i].chain = NULL;
}
/* Allocate and initialize the SCTP port hash table. */
sctp_proto.port_hashsize = 4096;
sctp_proto.port_hashtable = (sctp_bind_hashbucket_t *)
kmalloc(4096 * sizeof(sctp_bind_hashbucket_t), GFP_KERNEL);
if (!sctp_proto.port_hashtable) {
sctp_port_hashsize = 4096;
sctp_port_hashtable = (struct sctp_bind_hashbucket *)
kmalloc(4096 * sizeof(struct sctp_bind_hashbucket),GFP_KERNEL);
if (!sctp_port_hashtable) {
printk(KERN_ERR "SCTP: Failed bind hash alloc.");
status = -ENOMEM;
goto err_bhash_alloc;
}
sctp_proto.port_alloc_lock = SPIN_LOCK_UNLOCKED;
sctp_proto.port_rover = sysctl_local_port_range[0] - 1;
for (i = 0; i < sctp_proto.port_hashsize; i++) {
sctp_proto.port_hashtable[i].lock = SPIN_LOCK_UNLOCKED;
sctp_proto.port_hashtable[i].chain = NULL;
sctp_port_alloc_lock = SPIN_LOCK_UNLOCKED;
sctp_port_rover = sysctl_local_port_range[0] - 1;
for (i = 0; i < sctp_port_hashsize; i++) {
sctp_port_hashtable[i].lock = SPIN_LOCK_UNLOCKED;
sctp_port_hashtable[i].chain = NULL;
}
sctp_sysctl_register();
INIT_LIST_HEAD(&sctp_proto.address_families);
INIT_LIST_HEAD(&sctp_address_families);
sctp_register_af(&sctp_ipv4_specific);
status = sctp_v6_init();
......@@ -1031,13 +1070,13 @@ __init int sctp_init(void)
}
/* Initialize the local address list. */
INIT_LIST_HEAD(&sctp_proto.local_addr_list);
sctp_proto.local_addr_lock = SPIN_LOCK_UNLOCKED;
INIT_LIST_HEAD(&sctp_local_addr_list);
sctp_local_addr_lock = SPIN_LOCK_UNLOCKED;
/* Register notifier for inet address additions/deletions. */
register_inetaddr_notifier(&sctp_inetaddr_notifier);
sctp_get_local_addr_list(&sctp_proto);
sctp_get_local_addr_list();
__unsafe(THIS_MODULE);
return 0;
......@@ -1047,16 +1086,20 @@ __init int sctp_init(void)
err_v6_init:
sctp_sysctl_unregister();
list_del(&sctp_ipv4_specific.list);
kfree(sctp_proto.port_hashtable);
kfree(sctp_port_hashtable);
err_bhash_alloc:
kfree(sctp_proto.ep_hashbucket);
kfree(sctp_ep_hashbucket);
err_ehash_alloc:
kfree(sctp_proto.assoc_hashbucket);
kfree(sctp_assoc_hashbucket);
err_ahash_alloc:
sctp_dbg_objcnt_exit();
sctp_proc_exit();
cleanup_sctp_mibs();
err_init_mibs:
kmem_cache_destroy(sctp_chunk_cachep);
err_chunk_cachep:
kmem_cache_destroy(sctp_bucket_cachep);
err_bucket_cachep:
inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
inet_unregister_protosw(&sctp_seqpacket_protosw);
inet_unregister_protosw(&sctp_stream_protosw);
......@@ -1074,7 +1117,7 @@ __exit void sctp_exit(void)
unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
/* Free the local address list. */
sctp_free_local_addr_list(&sctp_proto);
sctp_free_local_addr_list();
/* Free the control endpoint. */
sock_release(sctp_ctl_socket);
......@@ -1083,9 +1126,12 @@ __exit void sctp_exit(void)
sctp_sysctl_unregister();
list_del(&sctp_ipv4_specific.list);
kfree(sctp_proto.assoc_hashbucket);
kfree(sctp_proto.ep_hashbucket);
kfree(sctp_proto.port_hashtable);
kfree(sctp_assoc_hashbucket);
kfree(sctp_ep_hashbucket);
kfree(sctp_port_hashtable);
kmem_cache_destroy(sctp_chunk_cachep);
kmem_cache_destroy(sctp_bucket_cachep);
sctp_dbg_objcnt_exit();
sctp_proc_exit();
......
net/sctp/sm_make_chunk.c
View file @ f5633ef0
......@@ -68,6 +68,8 @@
#include <net/sctp/sctp.h>
#include <net/sctp/sm.h>
extern kmem_cache_t *sctp_chunk_cachep;
/* What was the inbound interface for this chunk? */
int sctp_chunk_iif(const struct sctp_chunk *chunk)
{
......@@ -874,7 +876,7 @@ struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *asoc,
const void *payload, const size_t paylen)
{
struct sctp_chunk *retval = sctp_make_chunk(asoc, SCTP_CID_HEARTBEAT,
0, paylen);
0, paylen);
if (!retval)
goto nodata;
......@@ -976,7 +978,9 @@ struct sctp_chunk *sctp_chunkify(struct sk_buff *skb,
const struct sctp_association *asoc,
struct sock *sk)
{
struct sctp_chunk *retval = t_new(struct sctp_chunk, GFP_ATOMIC);
struct sctp_chunk *retval;
retval = kmem_cache_alloc(sctp_chunk_cachep, SLAB_ATOMIC);
if (!retval)
goto nodata;
......@@ -1048,7 +1052,7 @@ const union sctp_addr *sctp_source(const struct sctp_chunk *chunk)
* arguments, reserving enough space for a 'paylen' byte payload.
*/
struct sctp_chunk *sctp_make_chunk(const struct sctp_association *asoc,
__u8 type, __u8 flags, int paylen)
__u8 type, __u8 flags, int paylen)
{
struct sctp_chunk *retval;
sctp_chunkhdr_t *chunk_hdr;
......@@ -1075,13 +1079,12 @@ struct sctp_chunk *sctp_make_chunk(const struct sctp_association *asoc,
}
retval->chunk_hdr = chunk_hdr;
retval->chunk_end = ((__u8 *)chunk_hdr) + sizeof(sctp_chunkhdr_t);
retval->chunk_end = ((__u8 *)chunk_hdr) + sizeof(struct sctp_chunkhdr);
/* Set the skb to the belonging sock for accounting. */
skb->sk = sk;
return retval;
nodata:
return NULL;
}
......@@ -1090,12 +1093,11 @@ struct sctp_chunk *sctp_make_chunk(const struct sctp_association *asoc,
/* Release the memory occupied by a chunk. */
static void sctp_chunk_destroy(struct sctp_chunk *chunk)
{
/* Free the chunk skb data and the SCTP_chunk stub itself. */
dev_kfree_skb(chunk->skb);
kfree(chunk);
SCTP_DBG_OBJCNT_DEC(chunk);
kmem_cache_free(sctp_chunk_cachep, chunk);
}
/* Possibly, free the chunk. */
......@@ -1728,8 +1730,12 @@ int sctp_verify_init(const struct sctp_association *asoc,
sctp_walk_params(param, peer_init, init_hdr.params) {
if (!sctp_verify_param(asoc, param, cid, chunk, errp))
return 0;
if (!sctp_verify_param(asoc, param, cid, chunk, errp)) {
if (SCTP_PARAM_HOST_NAME_ADDRESS == param.p->type)
return 0;
else
return 1;
}
} /* for (loop through all parameters) */
......@@ -1907,7 +1913,7 @@ int sctp_process_param(struct sctp_association *asoc, union sctp_params param,
break;
case SCTP_PARAM_COOKIE_PRESERVATIVE:
if (!sctp_proto.cookie_preserve_enable)
if (!sctp_cookie_preserve_enable)
break;
stale = ntohl(param.life->lifespan_increment);
......
net/sctp/sm_sideeffect.c
View file @ f5633ef0
......@@ -415,7 +415,8 @@ static void sctp_cmd_init_failed(sctp_cmd_seq_t *commands,
struct sctp_ulpevent *event;
event = sctp_ulpevent_make_assoc_change(asoc,0, SCTP_CANT_STR_ASSOC,
0, 0, 0, GFP_ATOMIC);
(__u16)error, 0, 0,
GFP_ATOMIC);
if (event)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
......
net/sctp/sm_statefuns.c
View file @ f5633ef0
......@@ -738,7 +738,7 @@ sctp_disposition_t sctp_sf_sendbeat_8_3(const struct sctp_endpoint *ep,
{
struct sctp_transport *transport = (struct sctp_transport *) arg;
if (asoc->overall_error_count >= asoc->overall_error_threshold) {
if (asoc->overall_error_count > asoc->overall_error_threshold) {
/* CMD_ASSOC_FAILED calls CMD_DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_ASSOC_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
......@@ -1238,7 +1238,6 @@ static sctp_disposition_t sctp_sf_do_unexpected_init(
* parameter type.
*/
sctp_addto_chunk(repl, len, unk_param);
sctp_chunk_free(err_chunk);
}
sctp_add_cmd_sf(commands, SCTP_CMD_NEW_ASOC, SCTP_ASOC(new_asoc));
......@@ -1788,24 +1787,17 @@ sctp_disposition_t sctp_sf_cookie_echoed_err(const struct sctp_endpoint *ep,
struct sctp_chunk *chunk = arg;
sctp_errhdr_t *err;
err = (sctp_errhdr_t *)(chunk->skb->data);
/* If we have gotten too many failures, give up. */
if (1 + asoc->counters[SCTP_COUNTER_INIT_ERROR] >
asoc->max_init_attempts) {
/* INIT_FAILED will issue an ulpevent. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(err->cause));
return SCTP_DISPOSITION_DELETE_TCB;
}
/* Process the error here */
switch (err->cause) {
case SCTP_ERROR_STALE_COOKIE:
return sctp_sf_do_5_2_6_stale(ep, asoc, type, arg, commands);
default:
return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
/* FUTURE FIXME: When PR-SCTP related and other optional
* parms are emitted, this will have to change to handle multiple
* errors.
*/
sctp_walk_errors(err, chunk->chunk_hdr) {
if (SCTP_ERROR_STALE_COOKIE == err->cause)
return sctp_sf_do_5_2_6_stale(ep, asoc, type,
arg, commands);
}
return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
}
/*
......@@ -2067,6 +2059,7 @@ sctp_disposition_t sctp_sf_do_9_2_shutdown(const struct sctp_endpoint *ep,
struct sctp_chunk *chunk = arg;
sctp_shutdownhdr_t *sdh;
sctp_disposition_t disposition;
struct sctp_ulpevent *ev;
/* Convert the elaborate header. */
sdh = (sctp_shutdownhdr_t *)chunk->skb->data;
......@@ -2097,12 +2090,28 @@ sctp_disposition_t sctp_sf_do_9_2_shutdown(const struct sctp_endpoint *ep,
arg, commands);
}
if (SCTP_DISPOSITION_NOMEM == disposition)
goto out;
/* - verify, by checking the Cumulative TSN Ack field of the
* chunk, that all its outstanding DATA chunks have been
* received by the SHUTDOWN sender.
*/
sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_CTSN,
SCTP_U32(chunk->subh.shutdown_hdr->cum_tsn_ack));
/* API 5.3.1.5 SCTP_SHUTDOWN_EVENT
* When a peer sends a SHUTDOWN, SCTP delivers this notification to
* inform the application that it should cease sending data.
*/
ev = sctp_ulpevent_make_shutdown_event(asoc, 0, GFP_ATOMIC);
if (!ev) {
disposition = SCTP_DISPOSITION_NOMEM;
goto out;
}
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, SCTP_ULPEVENT(ev));
out:
return disposition;
}
......@@ -2334,7 +2343,7 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
if (af && af->is_ce(chunk->skb) && asoc->peer.ecn_capable) {
/* Do real work as sideffect. */
sctp_add_cmd_sf(commands, SCTP_CMD_ECN_CE,
sctp_add_cmd_sf(commands, SCTP_CMD_ECN_CE,
SCTP_U32(tsn));
}
}
......@@ -2375,7 +2384,7 @@ sctp_disposition_t sctp_sf_eat_data_6_2(const struct sctp_endpoint *ep,
* PMTU. In cases, such as loopback, this might be a rather
* large spill over.
*/
if (!asoc->rwnd || asoc->rwnd_over ||
if (!asoc->rwnd || asoc->rwnd_over ||
(datalen > asoc->rwnd + asoc->frag_point)) {
/* If this is the next TSN, consider reneging to make
......@@ -2594,7 +2603,7 @@ sctp_disposition_t sctp_sf_eat_data_fast_4_4(const struct sctp_endpoint *ep,
if (af && af->is_ce(chunk->skb) && asoc->peer.ecn_capable) {
/* Do real work as sideffect. */
sctp_add_cmd_sf(commands, SCTP_CMD_ECN_CE,
sctp_add_cmd_sf(commands, SCTP_CMD_ECN_CE,
SCTP_U32(tsn));
}
}
......@@ -2740,6 +2749,9 @@ sctp_disposition_t sctp_sf_eat_sack_6_2(const struct sctp_endpoint *ep,
/* Pull the SACK chunk from the data buffer */
sackh = sctp_sm_pull_sack(chunk);
/* Was this a bogus SACK? */
if (!sackh)
return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
chunk->subh.sack_hdr = sackh;
ctsn = ntohl(sackh->cum_tsn_ack);
......@@ -4406,22 +4418,27 @@ sctp_disposition_t sctp_sf_timer_ignore(const struct sctp_endpoint *ep,
********************************************************************/
/* Pull the SACK chunk based on the SACK header. */
sctp_sackhdr_t *sctp_sm_pull_sack(struct sctp_chunk *chunk)
struct sctp_sackhdr *sctp_sm_pull_sack(struct sctp_chunk *chunk)
{
sctp_sackhdr_t *sack;
struct sctp_sackhdr *sack;
unsigned int len;
__u16 num_blocks;
__u16 num_dup_tsns;
/* FIXME: Protect ourselves from reading too far into
/* Protect ourselves from reading too far into
* the skb from a bogus sender.
*/
sack = (sctp_sackhdr_t *) chunk->skb->data;
skb_pull(chunk->skb, sizeof(sctp_sackhdr_t));
sack = (struct sctp_sackhdr *) chunk->skb->data;
num_blocks = ntohs(sack->num_gap_ack_blocks);
num_dup_tsns = ntohs(sack->num_dup_tsns);
len = sizeof(struct sctp_sackhdr);
len = (num_blocks + num_dup_tsns) * sizeof(__u32);
if (len > chunk->skb->len)
return NULL;
skb_pull(chunk->skb, len);
skb_pull(chunk->skb, (num_blocks + num_dup_tsns) * sizeof(__u32));
return sack;
}
......
net/sctp/sm_statetable.c
View file @ f5633ef0
......@@ -436,51 +436,6 @@ sctp_sm_table_entry_t chunk_event_table[SCTP_NUM_BASE_CHUNK_TYPES][SCTP_STATE_NU
TYPE_SCTP_SHUTDOWN_COMPLETE,
}; /* state_fn_t chunk_event_table[][] */
static sctp_sm_table_entry_t
chunk_event_table_asconf[SCTP_STATE_NUM_STATES] = {
/* SCTP_STATE_EMPTY */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_CLOSED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_COOKIE_WAIT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_COOKIE_ECHOED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_ESTABLISHED */
{.fn = sctp_sf_discard_chunk,
.name = "sctp_sf_discard_chunk (will be sctp_addip_do_asconf)"},
/* SCTP_STATE_SHUTDOWN_PENDING */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_SENT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_RECEIVED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_ACK_SENT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
}; /* chunk asconf */
static sctp_sm_table_entry_t
chunk_event_table_asconf_ack[SCTP_STATE_NUM_STATES] = {
/* SCTP_STATE_EMPTY */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_CLOSED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_COOKIE_WAIT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_COOKIE_ECHOED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_ESTABLISHED */
{.fn = sctp_sf_discard_chunk,
.name = "sctp_sf_discard_chunk (will be sctp_addip_do_asconf_ack)"},
/* SCTP_STATE_SHUTDOWN_PENDING */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_SENT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_RECEIVED */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
/* SCTP_STATE_SHUTDOWN_ACK_SENT */
{.fn = sctp_sf_discard_chunk, .name = "sctp_sf_discard_chunk"},
}; /* chunk asconf_ack */
static sctp_sm_table_entry_t
chunk_event_table_unknown[SCTP_STATE_NUM_STATES] = {
......@@ -783,7 +738,7 @@ sctp_sm_table_entry_t other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_NUM_STA
/* SCTP_STATE_ESTABLISHED */ \
{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
/* SCTP_STATE_SHUTDOWN_PENDING */ \
{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
{.fn = sctp_sf_t5_timer_expire, .name = "sctp_sf_t5_timer_expire"}, \
/* SCTP_STATE_SHUTDOWN_SENT */ \
{.fn = sctp_sf_t5_timer_expire, .name = "sctp_sf_t5_timer_expire"}, \
/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
......@@ -877,13 +832,5 @@ sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t cid, sctp_state_t stat
return &chunk_event_table[cid][state];
}
switch (cid) {
case SCTP_CID_ASCONF:
return &chunk_event_table_asconf[state];
case SCTP_CID_ASCONF_ACK:
return &chunk_event_table_asconf_ack[state];
default:
return &chunk_event_table_unknown[state];
}
return &chunk_event_table_unknown[state];
}
net/sctp/socket.c
View file @ f5633ef0
......@@ -99,6 +99,8 @@ static void sctp_sock_migrate(struct sock *, struct sock *,
struct sctp_association *, sctp_socket_type_t);
static char *sctp_hmac_alg = SCTP_COOKIE_HMAC_ALG;
extern kmem_cache_t *sctp_bucket_cachep;
/* Look up the association by its id. If this is not a UDP-style
* socket, the ID field is always ignored.
*/
......@@ -106,10 +108,16 @@ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
{
struct sctp_association *asoc = NULL;
/* If this is not a UDP-style socket, assoc id should be
* ignored.
*/
/* If this is not a UDP-style socket, assoc id should be ignored. */
if (!sctp_style(sk, UDP)) {
/* Return NULL if the socket state is not ESTABLISHED. It
* could be a TCP-style listening socket or a socket which
* hasn't yet called connect() to establish an association.
*/
if (!sctp_sstate(sk, ESTABLISHED))
return NULL;
/* Get the first and the only association from the list. */
if (!list_empty(&sctp_sk(sk)->ep->asocs))
asoc = list_entry(sctp_sk(sk)->ep->asocs.next,
struct sctp_association, asocs);
......@@ -132,6 +140,30 @@ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
return asoc;
}
/* Look up the transport from an address and an assoc id. If both address and
* id are specified, the associations matching the address and the id should be
* the same.
*/
struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
struct sockaddr_storage *addr,
sctp_assoc_t id)
{
struct sctp_association *addr_asoc = NULL, *id_asoc = NULL;
struct sctp_transport *transport;
addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep,
(union sctp_addr *)addr,
&transport);
if (!addr_asoc)
return NULL;
id_asoc = sctp_id2assoc(sk, id);
if (id_asoc && (id_asoc != addr_asoc))
return NULL;
return transport;
}
/* API 3.1.2 bind() - UDP Style Syntax
* The syntax of bind() is,
*
......@@ -710,7 +742,7 @@ SCTP_STATIC void sctp_close(struct sock *sk, long timeout)
struct sctp_association *asoc;
struct list_head *pos, *temp;
printk("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout);
SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout);
sctp_lock_sock(sk);
sk->sk_shutdown = SHUTDOWN_MASK;
......@@ -1061,11 +1093,11 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
/* If the user didn't specify SNDRCVINFO, make up one with
* some defaults.
*/
default_sinfo.sinfo_stream = asoc->defaults.stream;
default_sinfo.sinfo_flags = asoc->defaults.flags;
default_sinfo.sinfo_ppid = asoc->defaults.ppid;
default_sinfo.sinfo_context = asoc->defaults.context;
default_sinfo.sinfo_timetolive = asoc->defaults.timetolive;
default_sinfo.sinfo_stream = asoc->default_stream;
default_sinfo.sinfo_flags = asoc->default_flags;
default_sinfo.sinfo_ppid = asoc->default_ppid;
default_sinfo.sinfo_context = asoc->default_context;
default_sinfo.sinfo_timetolive = asoc->default_timetolive;
default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc);
sinfo = &default_sinfo;
}
......@@ -1333,6 +1365,13 @@ SCTP_STATIC int sctp_recvmsg(struct kiocb *iocb, struct sock *sk,
return err;
}
/* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
*
* This option is a on/off flag. If enabled no SCTP message
* fragmentation will be performed. Instead if a message being sent
* exceeds the current PMTU size, the message will NOT be sent and
* instead a error will be indicated to the user.
*/
static int sctp_setsockopt_disable_fragments(struct sock *sk,
char *optval, int optlen)
{
......@@ -1359,6 +1398,17 @@ static int sctp_setsockopt_events(struct sock *sk, char *optval,
return 0;
}
/* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
*
* This socket option is applicable to the UDP-style socket only. When
* set it will cause associations that are idle for more than the
* specified number of seconds to automatically close. An association
* being idle is defined an association that has NOT sent or received
* user data. The special value of '0' indicates that no automatic
* close of any associations should be performed. The option expects an
* integer defining the number of seconds of idle time before an
* association is closed.
*/
static int sctp_setsockopt_autoclose(struct sock *sk, char *optval,
int optlen)
{
......@@ -1376,12 +1426,41 @@ static int sctp_setsockopt_autoclose(struct sock *sk, char *optval,
return 0;
}
/* 7.1.13 Peer Address Parameters (SCTP_SET_PEER_ADDR_PARAMS)
*
* 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 following structure is used to access and modify an
* 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;
* };
*
* spp_assoc_id - (UDP 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.
* spp_pathmaxrxt - This contains the maximum number of
* retransmissions before this address shall be
* considered unreachable.
*/
static int sctp_setsockopt_peer_addr_params(struct sock *sk,
char *optval, int optlen)
{
struct sctp_paddrparams params;
struct sctp_association *asoc;
union sctp_addr *addr;
struct sctp_transport *trans;
int error;
......@@ -1390,15 +1469,10 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
asoc = sctp_id2assoc(sk, params.spp_assoc_id);
if (!asoc)
return -EINVAL;
addr = (union sctp_addr *) &(params.spp_address);
trans = sctp_assoc_lookup_paddr(asoc, addr);
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans)
return -ENOENT;
return -EINVAL;
/* Applications can enable or disable heartbeats for any peer address
* of an association, modify an address's heartbeat interval, force a
......@@ -1412,7 +1486,7 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
* and the current interval should remain unchanged.
*/
if (0xffffffff == params.spp_hbinterval) {
error = sctp_primitive_REQUESTHEARTBEAT (asoc, trans);
error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans);
if (error)
return error;
} else {
......@@ -1435,6 +1509,17 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
return 0;
}
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
*
* Applications can specify protocol parameters for the default association
* initialization. The option name argument to setsockopt() and getsockopt()
* is SCTP_INITMSG.
*
* Setting initialization parameters is effective only on an unconnected
* socket (for UDP-style sockets only future associations are effected
* by the change). With TCP-style sockets, this option is inherited by
* sockets derived from a listener socket.
*/
static int sctp_setsockopt_initmsg(struct sock *sk, char *optval, int optlen)
{
if (optlen != sizeof(struct sctp_initmsg))
......@@ -1445,7 +1530,7 @@ static int sctp_setsockopt_initmsg(struct sock *sk, char *optval, int optlen)
}
/*
* 7.1.15 Set default send parameters (SET_DEFAULT_SEND_PARAM)
* 7.1.14 Set default send parameters (SET_DEFAULT_SEND_PARAM)
*
* Applications that wish to use the sendto() system call may wish to
* specify a default set of parameters that would normally be supplied
......@@ -1463,6 +1548,7 @@ static int sctp_setsockopt_default_send_param(struct sock *sk,
{
struct sctp_sndrcvinfo info;
struct sctp_association *asoc;
struct sctp_opt *sp = sctp_sk(sk);
if (optlen != sizeof(struct sctp_sndrcvinfo))
return -EINVAL;
......@@ -1470,14 +1556,23 @@ static int sctp_setsockopt_default_send_param(struct sock *sk,
return -EFAULT;
asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
if (!asoc)
if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP))
return -EINVAL;
asoc->defaults.stream = info.sinfo_stream;
asoc->defaults.flags = info.sinfo_flags;
asoc->defaults.ppid = info.sinfo_ppid;
asoc->defaults.context = info.sinfo_context;
asoc->defaults.timetolive = info.sinfo_timetolive;
if (asoc) {
asoc->default_stream = info.sinfo_stream;
asoc->default_flags = info.sinfo_flags;
asoc->default_ppid = info.sinfo_ppid;
asoc->default_context = info.sinfo_context;
asoc->default_timetolive = info.sinfo_timetolive;
} else {
sp->default_stream = info.sinfo_stream;
sp->default_flags = info.sinfo_flags;
sp->default_ppid = info.sinfo_ppid;
sp->default_context = info.sinfo_context;
sp->default_timetolive = info.sinfo_timetolive;
}
return 0;
}
......@@ -1490,8 +1585,6 @@ static int sctp_setsockopt_default_send_param(struct sock *sk,
static int sctp_setsockopt_peer_prim(struct sock *sk, char *optval, int optlen)
{
struct sctp_setpeerprim prim;
struct sctp_association *asoc;
union sctp_addr *addr;
struct sctp_transport *trans;
if (optlen != sizeof(struct sctp_setpeerprim))
......@@ -1500,18 +1593,11 @@ static int sctp_setsockopt_peer_prim(struct sock *sk, char *optval, int optlen)
if (copy_from_user(&prim, optval, sizeof(struct sctp_setpeerprim)))
return -EFAULT;
asoc = sctp_id2assoc(sk, prim.sspp_assoc_id);
if (!asoc)
return -EINVAL;
/* Find the requested address. */
addr = (union sctp_addr *) &(prim.sspp_addr);
trans = sctp_assoc_lookup_paddr(asoc, addr);
trans = sctp_addr_id2transport(sk, &prim.sspp_addr, prim.sspp_assoc_id);
if (!trans)
return -ENOENT;
return -EINVAL;
sctp_assoc_set_primary(asoc, trans);
sctp_assoc_set_primary(trans->asoc, trans);
return 0;
}
......@@ -1906,13 +1992,10 @@ SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
SCTP_STATIC int sctp_init_sock(struct sock *sk)
{
struct sctp_endpoint *ep;
struct sctp_protocol *proto;
struct sctp_opt *sp;
SCTP_DEBUG_PRINTK("sctp_init_sock(sk: %p)\n", sk);
proto = sctp_get_protocol();
sp = sctp_sk(sk);
/* Initialize the SCTP per socket area. */
......@@ -1933,23 +2016,26 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
*/
sp->default_stream = 0;
sp->default_ppid = 0;
sp->default_flags = 0;
sp->default_context = 0;
sp->default_timetolive = 0;
/* Initialize default setup parameters. These parameters
* can be modified with the SCTP_INITMSG socket option or
* overridden by the SCTP_INIT CMSG.
*/
sp->initmsg.sinit_num_ostreams = proto->max_outstreams;
sp->initmsg.sinit_max_instreams = proto->max_instreams;
sp->initmsg.sinit_max_attempts = proto->max_retrans_init;
sp->initmsg.sinit_max_init_timeo = proto->rto_max / HZ;
sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
sp->initmsg.sinit_max_instreams = sctp_max_instreams;
sp->initmsg.sinit_max_attempts = sctp_max_retrans_init;
sp->initmsg.sinit_max_init_timeo = sctp_rto_max / HZ;
/* Initialize default RTO related parameters. These parameters can
* be modified for with the SCTP_RTOINFO socket option.
* FIXME: These are not used yet.
*/
sp->rtoinfo.srto_initial = proto->rto_initial;
sp->rtoinfo.srto_max = proto->rto_max;
sp->rtoinfo.srto_min = proto->rto_min;
sp->rtoinfo.srto_initial = sctp_rto_initial;
sp->rtoinfo.srto_max = sctp_rto_max;
sp->rtoinfo.srto_min = sctp_rto_min;
/* Initialize default event subscriptions.
* the struct sock is initialized to zero, so only
......@@ -1964,8 +2050,8 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
/* Default Peer Address Parameters. These defaults can
* be modified via SCTP_SET_PEER_ADDR_PARAMS
*/
sp->paddrparam.spp_hbinterval = proto->hb_interval / HZ;
sp->paddrparam.spp_pathmaxrxt = proto->max_retrans_path;
sp->paddrparam.spp_hbinterval = sctp_hb_interval / HZ;
sp->paddrparam.spp_pathmaxrxt = sctp_max_retrans_path;
/* If enabled no SCTP message fragmentation will be performed.
* Configure through SCTP_DISABLE_FRAGMENTS socket option.
......@@ -2131,6 +2217,64 @@ static int sctp_getsockopt_sctp_status(struct sock *sk, int len, char *optval,
return (retval);
}
/* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
*
* Applications can retrieve information about a specific peer address
* of an association, including its reachability state, congestion
* window, and retransmission timer values. This information is
* read-only.
*/
static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
char *optval, int *optlen)
{
struct sctp_paddrinfo pinfo;
struct sctp_transport *transport;
int retval = 0;
if (len != sizeof(pinfo)) {
retval = -EINVAL;
goto out;
}
if (copy_from_user(&pinfo, optval, sizeof(pinfo))) {
retval = -EFAULT;
goto out;
}
transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
pinfo.spinfo_assoc_id);
if (!transport)
return -EINVAL;
pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
pinfo.spinfo_state = transport->active;
pinfo.spinfo_cwnd = transport->cwnd;
pinfo.spinfo_srtt = transport->srtt;
pinfo.spinfo_rto = transport->rto;
pinfo.spinfo_mtu = transport->pmtu;
if (put_user(len, optlen)) {
retval = -EFAULT;
goto out;
}
if (copy_to_user(optval, &pinfo, len)) {
retval = -EFAULT;
goto out;
}
out:
return (retval);
}
/* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
*
* This option is a on/off flag. If enabled no SCTP message
* fragmentation will be performed. Instead if a message being sent
* exceeds the current PMTU size, the message will NOT be sent and
* instead a error will be indicated to the user.
*/
static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
char *optval, int *optlen)
{
......@@ -2148,6 +2292,11 @@ static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
return 0;
}
/* 7.1.15 Set notification and ancillary events (SCTP_SET_EVENTS)
*
* This socket option is used to specify various notifications and
* ancillary data the user wishes to receive.
*/
static int sctp_getsockopt_set_events(struct sock *sk, int len, char *optval, int *optlen)
{
if (len != sizeof(struct sctp_event_subscribe))
......@@ -2157,6 +2306,17 @@ static int sctp_getsockopt_set_events(struct sock *sk, int len, char *optval, in
return 0;
}
/* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
*
* This socket option is applicable to the UDP-style socket only. When
* set it will cause associations that are idle for more than the
* specified number of seconds to automatically close. An association
* being idle is defined an association that has NOT sent or received
* user data. The special value of '0' indicates that no automatic
* close of any associations should be performed. The option expects an
* integer defining the number of seconds of idle time before an
* association is closed.
*/
static int sctp_getsockopt_autoclose(struct sock *sk, int len, char *optval, int *optlen)
{
/* Applicable to UDP-style socket only */
......@@ -2240,12 +2400,41 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char *optval, int *
return retval;
}
/* 7.1.13 Peer Address Parameters (SCTP_SET_PEER_ADDR_PARAMS)
*
* 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 following structure is used to access and modify an
* 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;
* };
*
* spp_assoc_id - (UDP 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.
* spp_pathmaxrxt - This contains the maximum number of
* retransmissions before this address shall be
* considered unreachable.
*/
static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
char *optval, int *optlen)
{
struct sctp_paddrparams params;
struct sctp_association *asoc;
union sctp_addr *addr;
struct sctp_transport *trans;
if (len != sizeof(struct sctp_paddrparams))
......@@ -2253,15 +2442,10 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
if (copy_from_user(&params, optval, *optlen))
return -EFAULT;
asoc = sctp_id2assoc(sk, params.spp_assoc_id);
if (!asoc)
return -EINVAL;
addr = (union sctp_addr *) &(params.spp_address);
trans = sctp_assoc_lookup_paddr(asoc, addr);
trans = sctp_addr_id2transport(sk, &params.spp_address,
params.spp_assoc_id);
if (!trans)
return -ENOENT;
return -EINVAL;
/* The value of the heartbeat interval, in milliseconds. A value of 0,
* when modifying the parameter, specifies that the heartbeat on this
......@@ -2286,6 +2470,17 @@ static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
return 0;
}
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
*
* Applications can specify protocol parameters for the default association
* initialization. The option name argument to setsockopt() and getsockopt()
* is SCTP_INITMSG.
*
* Setting initialization parameters is effective only on an unconnected
* socket (for UDP-style sockets only future associations are effected
* by the change). With TCP-style sockets, this option is inherited by
* sockets derived from a listener socket.
*/
static int sctp_getsockopt_initmsg(struct sock *sk, int len, char *optval, int *optlen)
{
if (len != sizeof(struct sctp_initmsg))
......@@ -2491,7 +2686,7 @@ static int sctp_getsockopt_peer_prim(struct sock *sk, int len,
/*
*
* 7.1.15 Set default send parameters (SET_DEFAULT_SEND_PARAM)
* 7.1.14 Set default send parameters (SET_DEFAULT_SEND_PARAM)
*
* Applications that wish to use the sendto() system call may wish to
* specify a default set of parameters that would normally be supplied
......@@ -2511,6 +2706,7 @@ static int sctp_getsockopt_default_send_param(struct sock *sk,
{
struct sctp_sndrcvinfo info;
struct sctp_association *asoc;
struct sctp_opt *sp = sctp_sk(sk);
if (len != sizeof(struct sctp_sndrcvinfo))
return -EINVAL;
......@@ -2518,14 +2714,22 @@ static int sctp_getsockopt_default_send_param(struct sock *sk,
return -EFAULT;
asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
if (!asoc)
if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP))
return -EINVAL;
info.sinfo_stream = asoc->defaults.stream;
info.sinfo_flags = asoc->defaults.flags;
info.sinfo_ppid = asoc->defaults.ppid;
info.sinfo_context = asoc->defaults.context;
info.sinfo_timetolive = asoc->defaults.timetolive;
if (asoc) {
info.sinfo_stream = asoc->default_stream;
info.sinfo_flags = asoc->default_flags;
info.sinfo_ppid = asoc->default_ppid;
info.sinfo_context = asoc->default_context;
info.sinfo_timetolive = asoc->default_timetolive;
} else {
info.sinfo_stream = sp->default_stream;
info.sinfo_flags = sp->default_flags;
info.sinfo_ppid = sp->default_ppid;
info.sinfo_context = sp->default_context;
info.sinfo_timetolive = sp->default_timetolive;
}
if (copy_to_user(optval, &info, sizeof(struct sctp_sndrcvinfo)))
return -EFAULT;
......@@ -2698,6 +2902,10 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
case SCTP_MAXSEG:
retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
break;
case SCTP_GET_PEER_ADDR_INFO:
retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
optlen);
break;
default:
retval = -ENOPROTOOPT;
break;
......@@ -2721,7 +2929,7 @@ static void sctp_unhash(struct sock *sk)
*
* The port hash table (contained in the 'global' SCTP protocol storage
* returned by struct sctp_protocol *sctp_get_protocol()). The hash
* table is an array of 4096 lists (sctp_bind_hashbucket_t). Each
* table is an array of 4096 lists (sctp_bind_hashbucket). Each
* list (the list number is the port number hashed out, so as you
* would expect from a hash function, all the ports in a given list have
* such a number that hashes out to the same list number; you were
......@@ -2729,13 +2937,13 @@ static void sctp_unhash(struct sock *sk)
* link to the socket (struct sock) that uses it, the port number and
* a fastreuse flag (FIXME: NPI ipg).
*/
static sctp_bind_bucket_t *sctp_bucket_create(sctp_bind_hashbucket_t *head,
unsigned short snum);
static struct sctp_bind_bucket *sctp_bucket_create(
struct sctp_bind_hashbucket *head, unsigned short snum);
static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
{
sctp_bind_hashbucket_t *head; /* hash list */
sctp_bind_bucket_t *pp; /* hash list port iterator */
struct sctp_protocol *sctp = sctp_get_protocol();
struct sctp_bind_hashbucket *head; /* hash list */
struct sctp_bind_bucket *pp; /* hash list port iterator */
unsigned short snum;
int ret;
......@@ -2750,8 +2958,8 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
if (snum == 0) {
/* Search for an available port.
*
* 'sctp->port_rover' was the last port assigned, so
* we start to search from 'sctp->port_rover +
* 'sctp_port_rover' was the last port assigned, so
* we start to search from 'sctp_port_rover +
* 1'. What we do is first check if port 'rover' is
* already in the hash table; if not, we use that; if
* it is, we try next.
......@@ -2762,14 +2970,14 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
int rover;
int index;
sctp_spin_lock(&sctp->port_alloc_lock);
rover = sctp->port_rover;
sctp_spin_lock(&sctp_port_alloc_lock);
rover = sctp_port_rover;
do {
rover++;
if ((rover < low) || (rover > high))
rover = low;
index = sctp_phashfn(rover);
head = &sctp->port_hashtable[index];
head = &sctp_port_hashtable[index];
sctp_spin_lock(&head->lock);
for (pp = head->chain; pp; pp = pp->next)
if (pp->port == rover)
......@@ -2778,8 +2986,8 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
next:
sctp_spin_unlock(&head->lock);
} while (--remaining > 0);
sctp->port_rover = rover;
sctp_spin_unlock(&sctp->port_alloc_lock);
sctp_port_rover = rover;
sctp_spin_unlock(&sctp_port_alloc_lock);
/* Exhausted local port range during search? */
ret = 1;
......@@ -2799,7 +3007,7 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
* to the port number (snum) - we detect that with the
* port iterator, pp being NULL.
*/
head = &sctp->port_hashtable[sctp_phashfn(snum)];
head = &sctp_port_hashtable[sctp_phashfn(snum)];
sctp_spin_lock(&head->lock);
for (pp = head->chain; pp; pp = pp->next) {
if (pp->port == snum)
......@@ -3105,12 +3313,13 @@ unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
* 2nd Level Abstractions
********************************************************************/
static sctp_bind_bucket_t *sctp_bucket_create(sctp_bind_hashbucket_t *head, unsigned short snum)
static struct sctp_bind_bucket *sctp_bucket_create(
struct sctp_bind_hashbucket *head, unsigned short snum)
{
sctp_bind_bucket_t *pp;
struct sctp_bind_bucket *pp;
SCTP_DEBUG_PRINTK( "sctp_bucket_create() begins, snum=%d\n", snum);
pp = kmalloc(sizeof(sctp_bind_bucket_t), GFP_ATOMIC);
pp = kmem_cache_alloc(sctp_bucket_cachep, SLAB_ATOMIC);
SCTP_DBG_OBJCNT_INC(bind_bucket);
if (pp) {
pp->port = snum;
pp->fastreuse = 0;
......@@ -3120,31 +3329,36 @@ static sctp_bind_bucket_t *sctp_bucket_create(sctp_bind_hashbucket_t *head, unsi
head->chain = pp;
pp->pprev = &head->chain;
}
SCTP_DEBUG_PRINTK("sctp_bucket_create() ends, pp=%p\n", pp);
return pp;
}
/* Caller must hold hashbucket lock for this tb with local BH disabled */
static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
{
if (!pp->sk) {
if (pp->next)
pp->next->pprev = pp->pprev;
*(pp->pprev) = pp->next;
kmem_cache_free(sctp_bucket_cachep, pp);
SCTP_DBG_OBJCNT_DEC(bind_bucket);
}
}
/* FIXME: Comments! */
static __inline__ void __sctp_put_port(struct sock *sk)
{
struct sctp_protocol *sctp_proto = sctp_get_protocol();
sctp_bind_hashbucket_t *head =
&sctp_proto->port_hashtable[sctp_phashfn(inet_sk(sk)->num)];
sctp_bind_bucket_t *pp;
struct sctp_bind_hashbucket *head =
&sctp_port_hashtable[sctp_phashfn(inet_sk(sk)->num)];
struct sctp_bind_bucket *pp;
sctp_spin_lock(&head->lock);
pp = (sctp_bind_bucket_t *)sk->sk_prev;
pp = (struct sctp_bind_bucket *)sk->sk_prev;
if (sk->sk_bind_next)
sk->sk_bind_next->sk_bind_pprev = sk->sk_bind_pprev;
*(sk->sk_bind_pprev) = sk->sk_bind_next;
sk->sk_prev = NULL;
inet_sk(sk)->num = 0;
if (pp->sk) {
if (pp->next)
pp->next->pprev = pp->pprev;
*(pp->pprev) = pp->next;
kfree(pp);
}
sctp_bucket_destroy(pp);
sctp_spin_unlock(&head->lock);
}
......
net/sctp/sysctl.c
View file @ f5633ef0
......@@ -42,13 +42,11 @@
#include <net/sctp/structs.h>
#include <linux/sysctl.h>
extern struct sctp_protocol sctp_proto;
static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_RTO_INITIAL,
.procname = "rto_initial",
.data = &sctp_proto.rto_initial,
.data = &sctp_rto_initial,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -57,7 +55,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_RTO_MIN,
.procname = "rto_min",
.data = &sctp_proto.rto_min,
.data = &sctp_rto_min,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -66,7 +64,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_RTO_MAX,
.procname = "rto_max",
.data = &sctp_proto.rto_max,
.data = &sctp_rto_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -75,7 +73,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_VALID_COOKIE_LIFE,
.procname = "valid_cookie_life",
.data = &sctp_proto.valid_cookie_life,
.data = &sctp_valid_cookie_life,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -84,7 +82,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_MAX_BURST,
.procname = "max_burst",
.data = &sctp_proto.max_burst,
.data = &sctp_max_burst,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......@@ -92,7 +90,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_ASSOCIATION_MAX_RETRANS,
.procname = "association_max_retrans",
.data = &sctp_proto.max_retrans_association,
.data = &sctp_max_retrans_association,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......@@ -100,7 +98,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_PATH_MAX_RETRANS,
.procname = "path_max_retrans",
.data = &sctp_proto.max_retrans_path,
.data = &sctp_max_retrans_path,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......@@ -108,7 +106,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_MAX_INIT_RETRANSMITS,
.procname = "max_init_retransmits",
.data = &sctp_proto.max_retrans_init,
.data = &sctp_max_retrans_init,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......@@ -116,7 +114,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_HB_INTERVAL,
.procname = "hb_interval",
.data = &sctp_proto.hb_interval,
.data = &sctp_hb_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -125,7 +123,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_PRESERVE_ENABLE,
.procname = "cookie_preserve_enable",
.data = &sctp_proto.cookie_preserve_enable,
.data = &sctp_cookie_preserve_enable,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
......@@ -134,7 +132,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_RTO_ALPHA,
.procname = "rto_alpha_exp_divisor",
.data = &sctp_proto.rto_alpha,
.data = &sctp_rto_alpha,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......@@ -142,7 +140,7 @@ static ctl_table sctp_table[] = {
{
.ctl_name = NET_SCTP_RTO_BETA,
.procname = "rto_beta_exp_divisor",
.data = &sctp_proto.rto_beta,
.data = &sctp_rto_beta,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
......
net/sctp/transport.c
View file @ f5633ef0
......@@ -82,8 +82,6 @@ struct sctp_transport *sctp_transport_init(struct sctp_transport *peer,
const union sctp_addr *addr,
int gfp)
{
struct sctp_protocol *proto = sctp_get_protocol();
/* Copy in the address. */
peer->ipaddr = *addr;
peer->af_specific = sctp_get_af_specific(addr->sa.sa_family);
......@@ -99,7 +97,7 @@ struct sctp_transport *sctp_transport_init(struct sctp_transport *peer,
* parameter 'RTO.Initial'.
*/
peer->rtt = 0;
peer->rto = proto->rto_initial;
peer->rto = sctp_rto_initial;
peer->rttvar = 0;
peer->srtt = 0;
peer->rto_pending = 0;
......@@ -108,11 +106,11 @@ struct sctp_transport *sctp_transport_init(struct sctp_transport *peer,
peer->last_time_used = jiffies;
peer->last_time_ecne_reduced = jiffies;
peer->active = 1;
peer->active = SCTP_ACTIVE;
peer->hb_allowed = 0;
/* Initialize the default path max_retrans. */
peer->max_retrans = proto->max_retrans_path;
peer->max_retrans = sctp_max_retrans_path;
peer->error_threshold = 0;
peer->error_count = 0;
......@@ -272,8 +270,6 @@ void sctp_transport_put(struct sctp_transport *transport)
/* Update transport's RTO based on the newly calculated RTT. */
void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
{
struct sctp_protocol *proto = sctp_get_protocol();
/* Check for valid transport. */
SCTP_ASSERT(tp, "NULL transport", return);
......@@ -292,10 +288,10 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
* For example, assuming the default value of RTO.Alpha of
* 1/8, rto_alpha would be expressed as 3.
*/
tp->rttvar = tp->rttvar - (tp->rttvar >> proto->rto_beta)
+ ((abs(tp->srtt - rtt)) >> proto->rto_beta);
tp->srtt = tp->srtt - (tp->srtt >> proto->rto_alpha)
+ (rtt >> proto->rto_alpha);
tp->rttvar = tp->rttvar - (tp->rttvar >> sctp_rto_beta)
+ ((abs(tp->srtt - rtt)) >> sctp_rto_beta);
tp->srtt = tp->srtt - (tp->srtt >> sctp_rto_alpha)
+ (rtt >> sctp_rto_alpha);
} else {
/* 6.3.1 C2) When the first RTT measurement R is made, set
* SRTT <- R, RTTVAR <- R/2.
......
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