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[SCTP] sctp_connectx() API support 

Implements sctp_connectx() as defined in the SCTP sockets API draft by
tunneling the request through a setsockopt().

Signed-off-by: Frank Filz <ffilzlnx@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 2005-06-20 13:14:57 -07:00 committed by David S. Miller
parent 8b22c249e7
commit 3f7a87d2fa
16 changed files with 677 additions and 260 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
include/net/sctp/command.h
View File

@ -65,9 +65,11 @@ typedef enum {
SCTP_CMD_TIMER_START, /* Start a timer. */
SCTP_CMD_TIMER_RESTART, /* Restart a timer. */
SCTP_CMD_TIMER_STOP, /* Stop a timer. */
SCTP_CMD_COUNTER_RESET, /* Reset a counter. */
SCTP_CMD_COUNTER_INC, /* Increment a counter. */
SCTP_CMD_INIT_CHOOSE_TRANSPORT, /* Choose transport for an INIT. */
SCTP_CMD_INIT_COUNTER_RESET, /* Reset init counter. */
SCTP_CMD_INIT_COUNTER_INC, /* Increment init counter. */
SCTP_CMD_INIT_RESTART, /* High level, do init timer work. */
SCTP_CMD_COOKIEECHO_RESTART, /* High level, do cookie-echo timer work. */
SCTP_CMD_INIT_FAILED, /* High level, do init failure work. */
SCTP_CMD_REPORT_DUP, /* Report a duplicate TSN. */
SCTP_CMD_STRIKE, /* Mark a strike against a transport. */
@ -118,7 +120,6 @@ typedef union {
int error;
sctp_state_t state;
sctp_event_timeout_t to;
sctp_counter_t counter;
void *ptr;
struct sctp_chunk *chunk;
struct sctp_association *asoc;
@ -165,7 +166,6 @@ SCTP_ARG_CONSTRUCTOR(U16, __u16, u16)
SCTP_ARG_CONSTRUCTOR(U8, __u8, u8)
SCTP_ARG_CONSTRUCTOR(ERROR, int, error)
SCTP_ARG_CONSTRUCTOR(STATE, sctp_state_t, state)
SCTP_ARG_CONSTRUCTOR(COUNTER, sctp_counter_t, counter)
SCTP_ARG_CONSTRUCTOR(TO, sctp_event_timeout_t, to)
SCTP_ARG_CONSTRUCTOR(PTR, void *, ptr)
SCTP_ARG_CONSTRUCTOR(CHUNK, struct sctp_chunk *, chunk)

7
include/net/sctp/constants.h
View File

@ -263,13 +263,6 @@ enum { SCTP_MIN_PMTU = 576 };
enum { SCTP_MAX_DUP_TSNS = 16 };
enum { SCTP_MAX_GABS = 16 };
typedef enum {
SCTP_COUNTER_INIT_ERROR,
} sctp_counter_t;
/* How many counters does an association need? */
#define SCTP_NUMBER_COUNTERS 5
/* Here we define the default timers. */
/* cookie timer def = ? seconds */

17
include/net/sctp/sctp.h
View File

@ -223,6 +223,22 @@ DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
extern int sctp_debug_flag;
#define SCTP_DEBUG_PRINTK(whatever...) \
((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
#define SCTP_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \
if (sctp_debug_flag) { \
if (saddr->sa.sa_family == AF_INET6) { \
printk(KERN_DEBUG \
lead "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x" trail, \
leadparm, \
NIP6(saddr->v6.sin6_addr), \
otherparms); \
} else { \
printk(KERN_DEBUG \
lead "%u.%u.%u.%u" trail, \
leadparm, \
NIPQUAD(saddr->v4.sin_addr.s_addr), \
otherparms); \
} \
}
#define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
#define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
@ -236,6 +252,7 @@ extern int sctp_debug_flag;
#else /* SCTP_DEBUG */
#define SCTP_DEBUG_PRINTK(whatever...)
#define SCTP_DEBUG_PRINTK_IPADDR(whatever...)
#define SCTP_ENABLE_DEBUG
#define SCTP_DISABLE_DEBUG
#define SCTP_ASSERT(expr, str, func)

8
include/net/sctp/sm.h
View File

@ -116,7 +116,8 @@ sctp_state_fn_t sctp_sf_eat_data_fast_4_4;
sctp_state_fn_t sctp_sf_eat_sack_6_2;
sctp_state_fn_t sctp_sf_tabort_8_4_8;
sctp_state_fn_t sctp_sf_operr_notify;
sctp_state_fn_t sctp_sf_t1_timer_expire;
sctp_state_fn_t sctp_sf_t1_init_timer_expire;
sctp_state_fn_t sctp_sf_t1_cookie_timer_expire;
sctp_state_fn_t sctp_sf_t2_timer_expire;
sctp_state_fn_t sctp_sf_t4_timer_expire;
sctp_state_fn_t sctp_sf_t5_timer_expire;
@ -258,7 +259,10 @@ struct sctp_chunk *sctp_make_fwdtsn(const struct sctp_association *asoc,
void sctp_chunk_assign_tsn(struct sctp_chunk *);
void sctp_chunk_assign_ssn(struct sctp_chunk *);
void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error);
sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands,
__u16 error,
const struct sctp_association *asoc,
struct sctp_transport *transport);
/* Prototypes for statetable processing. */

41
include/net/sctp/structs.h
View File

@ -867,10 +867,13 @@ struct sctp_transport {
*/
unsigned long last_time_ecne_reduced;
/* active : The current active state of this destination,
* : i.e. DOWN, UP, etc.
/* The number of times INIT has been sent on this transport. */
int init_sent_count;
/* state : The current state of this destination,
* : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKOWN.
*/
int active;
int state;
/* hb_allowed : The current heartbeat state of this destination,
* : i.e. ALLOW-HB, NO-HEARTBEAT, etc.
@ -1222,9 +1225,6 @@ struct sctp_endpoint {
/* sendbuf acct. policy. */
__u32 sndbuf_policy;
/* Name for debugging output... */
char *debug_name;
};
/* Recover the outter endpoint structure. */
@ -1314,11 +1314,23 @@ struct sctp_association {
* : association. Normally this information is
* : hashed or keyed for quick lookup and access
* : of the TCB.
* : The list is also initialized with the list
* : of addresses passed with the sctp_connectx()
* : call.
*
* It is a list of SCTP_transport's.
*/
struct list_head transport_addr_list;
/* transport_count
*
* Peer : A count of the number of peer addresses
* Transport : in the Peer Transport Address List.
* Address :
* Count :
*/
__u16 transport_count;
/* port
* The transport layer port number.
*/
@ -1486,6 +1498,9 @@ struct sctp_association {
/* Transport to which SHUTDOWN chunk was last sent. */
struct sctp_transport *shutdown_last_sent_to;
/* Transport to which INIT chunk was last sent. */
struct sctp_transport *init_last_sent_to;
/* Next TSN : The next TSN number to be assigned to a new
* : DATA chunk. This is sent in the INIT or INIT
* : ACK chunk to the peer and incremented each
@ -1549,8 +1564,11 @@ struct sctp_association {
/* The message size at which SCTP fragmentation will occur. */
__u32 frag_point;
/* Currently only one counter is used to count INIT errors. */
int counters[SCTP_NUMBER_COUNTERS];
/* Counter used to count INIT errors. */
int init_err_counter;
/* Count the number of INIT cycles (for doubling timeout). */
int init_cycle;
/* Default send parameters. */
__u16 default_stream;
@ -1708,6 +1726,8 @@ void sctp_association_free(struct sctp_association *);
void sctp_association_put(struct sctp_association *);
void sctp_association_hold(struct sctp_association *);
struct sctp_transport *sctp_assoc_choose_init_transport(
struct sctp_association *);
struct sctp_transport *sctp_assoc_choose_shutdown_transport(
struct sctp_association *);
void sctp_assoc_update_retran_path(struct sctp_association *);
@ -1717,9 +1737,12 @@ int sctp_assoc_lookup_laddr(struct sctp_association *asoc,
const union sctp_addr *laddr);
struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *,
const union sctp_addr *address,
const int gfp);
const int gfp,
const int peer_state);
void sctp_assoc_del_peer(struct sctp_association *asoc,
const union sctp_addr *addr);
void sctp_assoc_rm_peer(struct sctp_association *asoc,
struct sctp_transport *peer);
void sctp_assoc_control_transport(struct sctp_association *,
struct sctp_transport *,
sctp_transport_cmd_t, sctp_sn_error_t);

3
include/net/sctp/user.h
View File

@ -111,6 +111,8 @@ enum sctp_optname {
#define SCTP_GET_LOCAL_ADDRS_NUM SCTP_GET_LOCAL_ADDRS_NUM
SCTP_GET_LOCAL_ADDRS, /* Get all local addresss. */
#define SCTP_GET_LOCAL_ADDRS SCTP_GET_LOCAL_ADDRS
SCTP_SOCKOPT_CONNECTX, /* CONNECTX requests. */
#define SCTP_SOCKOPT_CONNECTX SCTP_SOCKOPT_CONNECTX
};
/*
@ -527,6 +529,7 @@ struct sctp_paddrinfo {
enum sctp_spinfo_state {
SCTP_INACTIVE,
SCTP_ACTIVE,
SCTP_UNKNOWN = 0xffff /* Value used for transport state unknown */
};
/*

151
net/sctp/associola.c
View File

@ -191,10 +191,6 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
asoc->last_cwr_tsn = asoc->ctsn_ack_point;
asoc->unack_data = 0;
SCTP_DEBUG_PRINTK("myctsnap for %s INIT as 0x%x.\n",
asoc->ep->debug_name,
asoc->ctsn_ack_point);
/* ADDIP Section 4.1 Asconf Chunk Procedures
*
* When an endpoint has an ASCONF signaled change to be sent to the
@ -211,6 +207,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
/* Make an empty list of remote transport addresses. */
INIT_LIST_HEAD(&asoc->peer.transport_addr_list);
asoc->peer.transport_count = 0;
/* RFC 2960 5.1 Normal Establishment of an Association
*
@ -288,6 +285,7 @@ struct sctp_association *sctp_association_new(const struct sctp_endpoint *ep,
asoc->base.malloced = 1;
SCTP_DBG_OBJCNT_INC(assoc);
SCTP_DEBUG_PRINTK("Created asoc %p\n", asoc);
return asoc;
@ -356,6 +354,8 @@ void sctp_association_free(struct sctp_association *asoc)
sctp_transport_free(transport);
}
asoc->peer.transport_count = 0;
/* Free any cached ASCONF_ACK chunk. */
if (asoc->addip_last_asconf_ack)
sctp_chunk_free(asoc->addip_last_asconf_ack);
@ -400,7 +400,7 @@ void sctp_assoc_set_primary(struct sctp_association *asoc,
/* If the primary path is changing, assume that the
* user wants to use this new path.
*/
if (transport->active)
if (transport->state != SCTP_INACTIVE)
asoc->peer.active_path = transport;
/*
@ -428,10 +428,58 @@ void sctp_assoc_set_primary(struct sctp_association *asoc,
transport->cacc.next_tsn_at_change = asoc->next_tsn;
}
/* Remove a transport from an association. */
void sctp_assoc_rm_peer(struct sctp_association *asoc,
struct sctp_transport *peer)
{
struct list_head *pos;
struct sctp_transport *transport;
SCTP_DEBUG_PRINTK_IPADDR("sctp_assoc_rm_peer:association %p addr: ",
" port: %d\n",
asoc,
(&peer->ipaddr),
peer->ipaddr.v4.sin_port);
/* If we are to remove the current retran_path, update it
* to the next peer before removing this peer from the list.
*/
if (asoc->peer.retran_path == peer)
sctp_assoc_update_retran_path(asoc);
/* Remove this peer from the list. */
list_del(&peer->transports);
/* Get the first transport of asoc. */
pos = asoc->peer.transport_addr_list.next;
transport = list_entry(pos, struct sctp_transport, transports);
/* Update any entries that match the peer to be deleted. */
if (asoc->peer.primary_path == peer)
sctp_assoc_set_primary(asoc, transport);
if (asoc->peer.active_path == peer)
asoc->peer.active_path = transport;
if (asoc->peer.last_data_from == peer)
asoc->peer.last_data_from = transport;
/* If we remove the transport an INIT was last sent to, set it to
* NULL. Combined with the update of the retran path above, this
* will cause the next INIT to be sent to the next available
* transport, maintaining the cycle.
*/
if (asoc->init_last_sent_to == peer)
asoc->init_last_sent_to = NULL;
asoc->peer.transport_count--;
sctp_transport_free(peer);
}
/* Add a transport address to an association. */
struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
const union sctp_addr *addr,
int gfp)
const int gfp,
const int peer_state)
{
struct sctp_transport *peer;
struct sctp_sock *sp;
@ -442,14 +490,25 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
/* AF_INET and AF_INET6 share common port field. */
port = addr->v4.sin_port;
SCTP_DEBUG_PRINTK_IPADDR("sctp_assoc_add_peer:association %p addr: ",
" port: %d state:%s\n",
asoc,
addr,
addr->v4.sin_port,
peer_state == SCTP_UNKNOWN?"UNKNOWN":"ACTIVE");
/* Set the port if it has not been set yet. */
if (0 == asoc->peer.port)
asoc->peer.port = port;
/* Check to see if this is a duplicate. */
peer = sctp_assoc_lookup_paddr(asoc, addr);
if (peer)
if (peer) {
if (peer_state == SCTP_ACTIVE &&
peer->state == SCTP_UNKNOWN)
peer->state = SCTP_ACTIVE;
return peer;
}
peer = sctp_transport_new(addr, gfp);
if (!peer)
@ -516,8 +575,12 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
/* Set the transport's RTO.initial value */
peer->rto = asoc->rto_initial;
/* Set the peer's active state. */
peer->state = peer_state;
/* Attach the remote transport to our asoc. */
list_add_tail(&peer->transports, &asoc->peer.transport_addr_list);
asoc->peer.transport_count++;
/* If we do not yet have a primary path, set one. */
if (!asoc->peer.primary_path) {
@ -525,8 +588,9 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
asoc->peer.retran_path = peer;
}
if (asoc->peer.active_path == asoc->peer.retran_path)
if (asoc->peer.active_path == asoc->peer.retran_path) {
asoc->peer.retran_path = peer;
}
return peer;
}
@ -537,37 +601,16 @@ void sctp_assoc_del_peer(struct sctp_association *asoc,
{
struct list_head *pos;
struct list_head *temp;
struct sctp_transport *peer = NULL;
struct sctp_transport *transport;
list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
transport = list_entry(pos, struct sctp_transport, transports);
if (sctp_cmp_addr_exact(addr, &transport->ipaddr)) {
peer = transport;
list_del(pos);
/* Do book keeping for removing the peer and free it. */
sctp_assoc_rm_peer(asoc, transport);
break;
}
}
/* The address we want delete is not in the association. */
if (!peer)
return;
/* Get the first transport of asoc. */
pos = asoc->peer.transport_addr_list.next;
transport = list_entry(pos, struct sctp_transport, transports);
/* Update any entries that match the peer to be deleted. */
if (asoc->peer.primary_path == peer)
sctp_assoc_set_primary(asoc, transport);
if (asoc->peer.active_path == peer)
asoc->peer.active_path = transport;
if (asoc->peer.retran_path == peer)
asoc->peer.retran_path = transport;
if (asoc->peer.last_data_from == peer)
asoc->peer.last_data_from = transport;
sctp_transport_free(peer);
}
/* Lookup a transport by address. */
@ -608,12 +651,12 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
/* Record the transition on the transport. */
switch (command) {
case SCTP_TRANSPORT_UP:
transport->active = SCTP_ACTIVE;
transport->state = SCTP_ACTIVE;
spc_state = SCTP_ADDR_AVAILABLE;
break;
case SCTP_TRANSPORT_DOWN:
transport->active = SCTP_INACTIVE;
transport->state = SCTP_INACTIVE;
spc_state = SCTP_ADDR_UNREACHABLE;
break;
@ -643,7 +686,7 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
list_for_each(pos, &asoc->peer.transport_addr_list) {
t = list_entry(pos, struct sctp_transport, transports);
if (!t->active)
if (t->state == SCTP_INACTIVE)
continue;
if (!first || t->last_time_heard > first->last_time_heard) {
second = first;
@ -663,7 +706,7 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
* [If the primary is active but not most recent, bump the most
* recently used transport.]
*/
if (asoc->peer.primary_path->active &&
if (asoc->peer.primary_path->state != SCTP_INACTIVE &&
first != asoc->peer.primary_path) {
second = first;
first = asoc->peer.primary_path;
@ -958,7 +1001,7 @@ void sctp_assoc_update(struct sctp_association *asoc,
transports);
if (!sctp_assoc_lookup_paddr(asoc, &trans->ipaddr))
sctp_assoc_add_peer(asoc, &trans->ipaddr,
GFP_ATOMIC);
GFP_ATOMIC, SCTP_ACTIVE);
}
asoc->ctsn_ack_point = asoc->next_tsn - 1;
@ -998,7 +1041,7 @@ void sctp_assoc_update_retran_path(struct sctp_association *asoc)
/* Try to find an active transport. */
if (t->active) {
if (t->state != SCTP_INACTIVE) {
break;
} else {
/* Keep track of the next transport in case
@ -1019,6 +1062,40 @@ void sctp_assoc_update_retran_path(struct sctp_association *asoc)
}
asoc->peer.retran_path = t;
SCTP_DEBUG_PRINTK_IPADDR("sctp_assoc_update_retran_path:association"
" %p addr: ",
" port: %d\n",
asoc,
(&t->ipaddr),
t->ipaddr.v4.sin_port);
}
/* Choose the transport for sending a INIT packet. */
struct sctp_transport *sctp_assoc_choose_init_transport(
struct sctp_association *asoc)
{
struct sctp_transport *t;
/* Use the retran path. If the last INIT was sent over the
* retran path, update the retran path and use it.
*/
if (!asoc->init_last_sent_to) {
t = asoc->peer.active_path;
} else {
if (asoc->init_last_sent_to == asoc->peer.retran_path)
sctp_assoc_update_retran_path(asoc);
t = asoc->peer.retran_path;
}
SCTP_DEBUG_PRINTK_IPADDR("sctp_assoc_update_retran_path:association"
" %p addr: ",
" port: %d\n",
asoc,
(&t->ipaddr),
t->ipaddr.v4.sin_port);
return t;
}
/* Choose the transport for sending a SHUTDOWN packet. */

1
net/sctp/endpointola.c
View File

@ -134,7 +134,6 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
ep->last_key = ep->current_key = 0;
ep->key_changed_at = jiffies;
ep->debug_name = "unnamedEndpoint";
return ep;
}

2
net/sctp/input.c
View File

@ -353,7 +353,7 @@ void sctp_icmp_proto_unreachable(struct sock *sk,
sctp_do_sm(SCTP_EVENT_T_OTHER,
SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),
asoc->state, asoc->ep, asoc, NULL,
asoc->state, asoc->ep, asoc, t,
GFP_ATOMIC);
}

11
net/sctp/outqueue.c
View File

@ -682,9 +682,9 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
if (!new_transport) {
new_transport = asoc->peer.active_path;
} else if (!new_transport->active) {
/* If the chunk is Heartbeat or Heartbeat Ack,
* send it to chunk->transport, even if it's
} else if (new_transport->state == SCTP_INACTIVE) {
/* If the chunk is Heartbeat or Heartbeat Ack,
* send it to chunk->transport, even if it's
* inactive.
*
* 3.3.6 Heartbeat Acknowledgement:
@ -840,7 +840,8 @@ int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout)
* Otherwise, we want to use the active path.
*/
new_transport = chunk->transport;
if (!new_transport || !new_transport->active)
if (!new_transport ||
new_transport->state == SCTP_INACTIVE)
new_transport = asoc->peer.active_path;
/* Change packets if necessary. */
@ -1454,7 +1455,7 @@ static void sctp_check_transmitted(struct sctp_outq *q,
/* Mark the destination transport address as
* active if it is not so marked.
*/
if (!transport->active) {
if (transport->state == SCTP_INACTIVE) {
sctp_assoc_control_transport(
transport->asoc,
transport,

20
net/sctp/sm_make_chunk.c
View File

@ -1830,7 +1830,7 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
* be a a better choice than any of the embedded addresses.
*/
if (peer_addr)
if(!sctp_assoc_add_peer(asoc, peer_addr, gfp))
if(!sctp_assoc_add_peer(asoc, peer_addr, gfp, SCTP_ACTIVE))
goto nomem;
/* Process the initialization parameters. */
@ -1841,6 +1841,14 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
goto clean_up;
}
/* Walk list of transports, removing transports in the UNKNOWN state. */
list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) {
transport = list_entry(pos, struct sctp_transport, transports);
if (transport->state == SCTP_UNKNOWN) {
sctp_assoc_rm_peer(asoc, transport);
}
}
/* The fixed INIT headers are always in network byte
* order.
*/
@ -1906,7 +1914,8 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
* stream sequence number shall be set to 0.
*/
/* Allocate storage for the negotiated streams if it is not a temporary * association.
/* Allocate storage for the negotiated streams if it is not a temporary
* association.
*/
if (!asoc->temp) {
int assoc_id;
@ -1952,6 +1961,9 @@ clean_up:
list_del_init(pos);
sctp_transport_free(transport);
}
asoc->peer.transport_count = 0;
nomem:
return 0;
}
@ -1995,7 +2007,7 @@ static int sctp_process_param(struct sctp_association *asoc,
af->from_addr_param(&addr, param.addr, asoc->peer.port, 0);
scope = sctp_scope(peer_addr);
if (sctp_in_scope(&addr, scope))
if (!sctp_assoc_add_peer(asoc, &addr, gfp))
if (!sctp_assoc_add_peer(asoc, &addr, gfp, SCTP_ACTIVE))
return 0;
break;
@ -2396,7 +2408,7 @@ static __u16 sctp_process_asconf_param(struct sctp_association *asoc,
* Due to Resource Shortage'.
*/
peer = sctp_assoc_add_peer(asoc, &addr, GFP_ATOMIC);
peer = sctp_assoc_add_peer(asoc, &addr, GFP_ATOMIC, SCTP_ACTIVE);
if (!peer)
return SCTP_ERROR_RSRC_LOW;

105
net/sctp/sm_sideeffect.c
View File

@ -414,11 +414,13 @@ static void sctp_do_8_2_transport_strike(struct sctp_association *asoc,
*/
asoc->overall_error_count++;
if (transport->active &&
if (transport->state != SCTP_INACTIVE &&
(transport->error_count++ >= transport->max_retrans)) {
SCTP_DEBUG_PRINTK("transport_strike: transport "
"IP:%d.%d.%d.%d failed.\n",
NIPQUAD(transport->ipaddr.v4.sin_addr));
SCTP_DEBUG_PRINTK_IPADDR("transport_strike:association %p",
" transport IP: port:%d failed.\n",
asoc,
(&transport->ipaddr),
transport->ipaddr.v4.sin_port);
sctp_assoc_control_transport(asoc, transport,
SCTP_TRANSPORT_DOWN,
SCTP_FAILED_THRESHOLD);
@ -593,7 +595,7 @@ static void sctp_cmd_transport_on(sctp_cmd_seq_t *cmds,
/* Mark the destination transport address as active if it is not so
* marked.
*/
if (!t->active)
if (t->state == SCTP_INACTIVE)
sctp_assoc_control_transport(asoc, t, SCTP_TRANSPORT_UP,
SCTP_HEARTBEAT_SUCCESS);
@ -665,8 +667,11 @@ static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds,
asoc->state = state;
SCTP_DEBUG_PRINTK("sctp_cmd_new_state: asoc %p[%s]\n",
asoc, sctp_state_tbl[state]);
if (sctp_style(sk, TCP)) {
/* Change the sk->sk_state of a TCP-style socket that has
/* Change the sk->sk_state of a TCP-style socket that has
* sucessfully completed a connect() call.
*/
if (sctp_state(asoc, ESTABLISHED) && sctp_sstate(sk, CLOSED))
@ -678,6 +683,16 @@ static void sctp_cmd_new_state(sctp_cmd_seq_t *cmds,
sk->sk_shutdown |= RCV_SHUTDOWN;
}
if (sctp_state(asoc, COOKIE_WAIT)) {
/* Reset init timeouts since they may have been
* increased due to timer expirations.
*/
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] =
asoc->ep->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT];
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] =
asoc->ep->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE];
}
if (sctp_state(asoc, ESTABLISHED) ||
sctp_state(asoc, CLOSED) ||
sctp_state(asoc, SHUTDOWN_RECEIVED)) {
@ -1120,10 +1135,10 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
* to be executed only during failed attempts of
* association establishment.
*/
if ((asoc->peer.retran_path !=
asoc->peer.primary_path) &&
(asoc->counters[SCTP_COUNTER_INIT_ERROR] > 0)) {
sctp_add_cmd_sf(commands,
if ((asoc->peer.retran_path !=
asoc->peer.primary_path) &&
(asoc->init_err_counter > 0)) {
sctp_add_cmd_sf(commands,
SCTP_CMD_FORCE_PRIM_RETRAN,
SCTP_NULL());
}
@ -1237,18 +1252,67 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
sctp_association_put(asoc);
break;
case SCTP_CMD_INIT_CHOOSE_TRANSPORT:
chunk = cmd->obj.ptr;
t = sctp_assoc_choose_init_transport(asoc);
asoc->init_last_sent_to = t;
chunk->transport = t;
t->init_sent_count++;
break;
case SCTP_CMD_INIT_RESTART:
/* Do the needed accounting and updates
* associated with restarting an initialization
* timer.
* timer. Only multiply the timeout by two if
* all transports have been tried at the current
* timeout.
*/
asoc->counters[SCTP_COUNTER_INIT_ERROR]++;
asoc->timeouts[cmd->obj.to] *= 2;
if (asoc->timeouts[cmd->obj.to] >
t = asoc->init_last_sent_to;
asoc->init_err_counter++;
if (t->init_sent_count > (asoc->init_cycle + 1)) {
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] *= 2;
if (asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] >
asoc->max_init_timeo) {
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT] =
asoc->max_init_timeo;
}
asoc->init_cycle++;
SCTP_DEBUG_PRINTK(
"T1 INIT Timeout adjustment"
" init_err_counter: %d"
" cycle: %d"
" timeout: %d\n",
asoc->init_err_counter,
asoc->init_cycle,
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT]);
}
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT));
break;
case SCTP_CMD_COOKIEECHO_RESTART:
/* Do the needed accounting and updates
* associated with restarting an initialization
* timer. Only multiply the timeout by two if
* all transports have been tried at the current
* timeout.
*/
asoc->init_err_counter++;
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] *= 2;
if (asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] >
asoc->max_init_timeo) {
asoc->timeouts[cmd->obj.to] =
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE] =
asoc->max_init_timeo;
}
SCTP_DEBUG_PRINTK(
"T1 COOKIE Timeout adjustment"
" init_err_counter: %d"
" timeout: %d\n",
asoc->init_err_counter,
asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE]);
/* If we've sent any data bundled with
* COOKIE-ECHO we need to resend.
@ -1261,7 +1325,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
sctp_add_cmd_sf(commands,
SCTP_CMD_TIMER_RESTART,
SCTP_TO(cmd->obj.to));
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_COOKIE));
break;
case SCTP_CMD_INIT_FAILED:
@ -1273,12 +1337,13 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
subtype, chunk, cmd->obj.u32);
break;
case SCTP_CMD_COUNTER_INC:
asoc->counters[cmd->obj.counter]++;
case SCTP_CMD_INIT_COUNTER_INC:
asoc->init_err_counter++;
break;
case SCTP_CMD_COUNTER_RESET:
asoc->counters[cmd->obj.counter] = 0;
case SCTP_CMD_INIT_COUNTER_RESET:
asoc->init_err_counter = 0;
asoc->init_cycle = 0;
break;
case SCTP_CMD_REPORT_DUP:

148
net/sctp/sm_statefuns.c
View File

@ -533,6 +533,9 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep,
sctp_add_cmd_sf(commands, SCTP_CMD_PEER_INIT,
SCTP_PEER_INIT(initchunk));
/* Reset init error count upon receipt of INIT-ACK. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_RESET, SCTP_NULL());
/* 5.1 C) "A" shall stop the T1-init timer and leave
* COOKIE-WAIT state. "A" shall then ... start the T1-cookie
* timer, and enter the COOKIE-ECHOED state.
@ -775,8 +778,7 @@ sctp_disposition_t sctp_sf_do_5_1E_ca(const struct sctp_endpoint *ep,
* from the COOKIE-ECHOED state to the COOKIE-WAIT
* state is performed.
*/
sctp_add_cmd_sf(commands, SCTP_CMD_COUNTER_RESET,
SCTP_COUNTER(SCTP_COUNTER_INIT_ERROR));
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_RESET, SCTP_NULL());
/* RFC 2960 5.1 Normal Establishment of an Association
*
@ -1019,10 +1021,22 @@ sctp_disposition_t sctp_sf_backbeat_8_3(const struct sctp_endpoint *ep,
link = sctp_assoc_lookup_paddr(asoc, &from_addr);
/* This should never happen, but lets log it if so. */
if (!link) {
printk(KERN_WARNING
"%s: Could not find address %d.%d.%d.%d\n",
__FUNCTION__, NIPQUAD(from_addr.v4.sin_addr));
if (unlikely(!link)) {
if (from_addr.sa.sa_family == AF_INET6) {
printk(KERN_WARNING
"%s association %p could not find address "
"%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
__FUNCTION__,
asoc,
NIP6(from_addr.v6.sin6_addr));
} else {
printk(KERN_WARNING
"%s association %p could not find address "
"%u.%u.%u.%u\n",
__FUNCTION__,
asoc,
NIPQUAD(from_addr.v4.sin_addr.s_addr));
}
return SCTP_DISPOSITION_DISCARD;
}
@ -2095,9 +2109,7 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep,
sctp_errhdr_t *err;
struct sctp_chunk *reply;
struct sctp_bind_addr *bp;
int attempts;
attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1;
int attempts = asoc->init_err_counter + 1;
if (attempts >= asoc->max_init_attempts) {
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
@ -2157,8 +2169,7 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep,
/* Cast away the const modifier, as we want to just
* rerun it through as a sideffect.
*/
sctp_add_cmd_sf(commands, SCTP_CMD_COUNTER_INC,
SCTP_COUNTER(SCTP_COUNTER_INIT_ERROR));
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_COUNTER_INC, SCTP_NULL());
sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_STOP,
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_COOKIE));
@ -2281,8 +2292,7 @@ sctp_disposition_t sctp_sf_cookie_wait_abort(const struct sctp_endpoint *ep,
if (len >= sizeof(struct sctp_chunkhdr) + sizeof(struct sctp_errhdr))
error = ((sctp_errhdr_t *)chunk->skb->data)->cause;
sctp_stop_t1_and_abort(commands, error);
return SCTP_DISPOSITION_ABORT;
return sctp_stop_t1_and_abort(commands, error, asoc, chunk->transport);
}
/*
@ -2294,8 +2304,8 @@ sctp_disposition_t sctp_sf_cookie_wait_icmp_abort(const struct sctp_endpoint *ep
void *arg,
sctp_cmd_seq_t *commands)
{
sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR);
return SCTP_DISPOSITION_ABORT;
return sctp_stop_t1_and_abort(commands, SCTP_ERROR_NO_ERROR, asoc,
(struct sctp_transport *)arg);
}
/*
@ -2318,8 +2328,12 @@ sctp_disposition_t sctp_sf_cookie_echoed_abort(const struct sctp_endpoint *ep,
*
* This is common code called by several sctp_sf_*_abort() functions above.
*/
void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error)
sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands,
__u16 error,
const struct sctp_association *asoc,
struct sctp_transport *transport)
{
SCTP_DEBUG_PRINTK("ABORT received (INIT).\n");
sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE,
SCTP_STATE(SCTP_STATE_CLOSED));
SCTP_INC_STATS(SCTP_MIB_ABORTEDS);
@ -2328,6 +2342,7 @@ void sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands, __u16 error)
/* CMD_INIT_FAILED will DELETE_TCB. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(error));
return SCTP_DISPOSITION_ABORT;
}
/*
@ -3805,6 +3820,10 @@ sctp_disposition_t sctp_sf_do_prm_asoc(const struct sctp_endpoint *ep,
sctp_add_cmd_sf(commands, SCTP_CMD_NEW_ASOC,
SCTP_ASOC((struct sctp_association *) asoc));
/* Choose transport for INIT. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT,
SCTP_CHUNK(repl));
/* After sending the INIT, "A" starts the T1-init timer and
* enters the COOKIE-WAIT state.
*/
@ -4589,7 +4608,7 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep,
}
/*
* sctp_sf_t1_timer_expire
* sctp_sf_t1_init_timer_expire
*
* Section: 4 Note: 2
* Verification Tag:
@ -4603,7 +4622,59 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep,
* endpoint MUST abort the initialization process and report the
* error to SCTP user.
*
* 3) If the T1-cookie timer expires, the endpoint MUST retransmit
* Outputs
* (timers, events)
*
*/
sctp_disposition_t sctp_sf_t1_init_timer_expire(const struct sctp_endpoint *ep,
const struct sctp_association *asoc,
const sctp_subtype_t type,
void *arg,
sctp_cmd_seq_t *commands)
{
struct sctp_chunk *repl = NULL;
struct sctp_bind_addr *bp;
int attempts = asoc->init_err_counter + 1;
SCTP_DEBUG_PRINTK("Timer T1 expired (INIT).\n");
if (attempts < asoc->max_init_attempts) {
bp = (struct sctp_bind_addr *) &asoc->base.bind_addr;
repl = sctp_make_init(asoc, bp, GFP_ATOMIC, 0);
if (!repl)
return SCTP_DISPOSITION_NOMEM;
/* Choose transport for INIT. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT,
SCTP_CHUNK(repl));
/* Issue a sideeffect to do the needed accounting. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_INIT));
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl));
} else {
SCTP_DEBUG_PRINTK("Giving up on INIT, attempts: %d"
" max_init_attempts: %d\n",
attempts, asoc->max_init_attempts);
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
SCTP_U32(SCTP_ERROR_NO_ERROR));
return SCTP_DISPOSITION_DELETE_TCB;
}
return SCTP_DISPOSITION_CONSUME;
}
/*
* sctp_sf_t1_cookie_timer_expire
*
* Section: 4 Note: 2
* Verification Tag:
* Inputs
* (endpoint, asoc)
*
* RFC 2960 Section 4 Notes
* 3) If the T1-cookie timer expires, the endpoint MUST retransmit
* COOKIE ECHO and re-start the T1-cookie timer without changing
* state. This MUST be repeated up to 'Max.Init.Retransmits' times.
* After that, the endpoint MUST abort the initialization process and
@ -4613,46 +4684,26 @@ sctp_disposition_t sctp_sf_do_6_2_sack(const struct sctp_endpoint *ep,
* (timers, events)
*
*/
sctp_disposition_t sctp_sf_t1_timer_expire(const struct sctp_endpoint *ep,
sctp_disposition_t sctp_sf_t1_cookie_timer_expire(const struct sctp_endpoint *ep,
const struct sctp_association *asoc,
const sctp_subtype_t type,
void *arg,
sctp_cmd_seq_t *commands)
{
struct sctp_chunk *repl;
struct sctp_bind_addr *bp;
sctp_event_timeout_t timer = (sctp_event_timeout_t) arg;
int timeout;
int attempts;
struct sctp_chunk *repl = NULL;
int attempts = asoc->init_err_counter + 1;
timeout = asoc->timeouts[timer];
attempts = asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1;
repl = NULL;
SCTP_DEBUG_PRINTK("Timer T1 expired.\n");
SCTP_DEBUG_PRINTK("Timer T1 expired (COOKIE-ECHO).\n");
if (attempts < asoc->max_init_attempts) {
switch (timer) {
case SCTP_EVENT_TIMEOUT_T1_INIT:
bp = (struct sctp_bind_addr *) &asoc->base.bind_addr;
repl = sctp_make_init(asoc, bp, GFP_ATOMIC, 0);
break;
case SCTP_EVENT_TIMEOUT_T1_COOKIE:
repl = sctp_make_cookie_echo(asoc, NULL);
break;
default:
BUG();
break;
};
repl = sctp_make_cookie_echo(asoc, NULL);
if (!repl)
goto nomem;
return SCTP_DISPOSITION_NOMEM;
/* Issue a sideeffect to do the needed accounting. */
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_RESTART,
SCTP_TO(timer));
sctp_add_cmd_sf(commands, SCTP_CMD_COOKIEECHO_RESTART,
SCTP_TO(SCTP_EVENT_TIMEOUT_T1_COOKIE));
sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl));
} else {
sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
@ -4661,9 +4712,6 @@ sctp_disposition_t sctp_sf_t1_timer_expire(const struct sctp_endpoint *ep,
}
return SCTP_DISPOSITION_CONSUME;
nomem:
return SCTP_DISPOSITION_NOMEM;
}
/* RFC2960 9.2 If the timer expires, the endpoint must re-send the SHUTDOWN

6
net/sctp/sm_statetable.c
View File

@ -783,7 +783,8 @@ static const sctp_sm_table_entry_t other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_
/* SCTP_STATE_COOKIE_WAIT */ \
{.fn = sctp_sf_bug, .name = "sctp_sf_bug"}, \
/* SCTP_STATE_COOKIE_ECHOED */ \
{.fn = sctp_sf_t1_timer_expire, .name = "sctp_sf_t1_timer_expire"}, \
{.fn = sctp_sf_t1_cookie_timer_expire, \
.name = "sctp_sf_t1_cookie_timer_expire"}, \
/* SCTP_STATE_ESTABLISHED */ \
{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
/* SCTP_STATE_SHUTDOWN_PENDING */ \
@ -802,7 +803,8 @@ static const sctp_sm_table_entry_t other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_
/* SCTP_STATE_CLOSED */ \
{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
/* SCTP_STATE_COOKIE_WAIT */ \
{.fn = sctp_sf_t1_timer_expire, .name = "sctp_sf_t1_timer_expire"}, \
{.fn = sctp_sf_t1_init_timer_expire, \
.name = "sctp_sf_t1_init_timer_expire"}, \
/* SCTP_STATE_COOKIE_ECHOED */ \
{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
/* SCTP_STATE_ESTABLISHED */ \

405
net/sctp/socket.c
View File

@ -262,18 +262,18 @@ static struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
* sockaddr_in6 [RFC 2553]),
* addr_len - the size of the address structure.
*/
SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
{
int retval = 0;
sctp_lock_sock(sk);
SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, uaddr: %p, addr_len: %d)\n",
sk, uaddr, addr_len);
SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n",
sk, addr, addr_len);
/* Disallow binding twice. */
if (!sctp_sk(sk)->ep->base.bind_addr.port)
retval = sctp_do_bind(sk, (union sctp_addr *)uaddr,
retval = sctp_do_bind(sk, (union sctp_addr *)addr,
addr_len);
else
retval = -EINVAL;
@ -318,23 +318,27 @@ SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
unsigned short snum;
int ret = 0;
SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d)\n",
sk, addr, len);
/* Common sockaddr verification. */
af = sctp_sockaddr_af(sp, addr, len);
if (!af)
if (!af) {
SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n",
sk, addr, len);
return -EINVAL;
}
snum = ntohs(addr->v4.sin_port);
SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ",
", port: %d, new port: %d, len: %d)\n",
sk,
addr,
bp->port, snum,
len);
/* PF specific bind() address verification. */
if (!sp->pf->bind_verify(sp, addr))
return -EADDRNOTAVAIL;
snum= ntohs(addr->v4.sin_port);
SCTP_DEBUG_PRINTK("sctp_do_bind: port: %d, new port: %d\n",
bp->port, snum);
/* We must either be unbound, or bind to the same port. */
if (bp->port && (snum != bp->port)) {
SCTP_DEBUG_PRINTK("sctp_do_bind:"
@ -816,7 +820,8 @@ out:
*
* Basically do nothing but copying the addresses from user to kernel
* land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
* This is used for tunneling the sctp_bindx() request through sctp_setsockopt() * from userspace.
* This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
* from userspace.
*
* We don't use copy_from_user() for optimization: we first do the
* sanity checks (buffer size -fast- and access check-healthy
@ -913,6 +918,243 @@ out:
return err;
}
/* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
*
* Common routine for handling connect() and sctp_connectx().
* Connect will come in with just a single address.
*/
static int __sctp_connect(struct sock* sk,
struct sockaddr *kaddrs,
int addrs_size)
{
struct sctp_sock *sp;
struct sctp_endpoint *ep;
struct sctp_association *asoc = NULL;
struct sctp_association *asoc2;
struct sctp_transport *transport;
union sctp_addr to;
struct sctp_af *af;
sctp_scope_t scope;
long timeo;
int err = 0;
int addrcnt = 0;
int walk_size = 0;
struct sockaddr *sa_addr;
void *addr_buf;
sp = sctp_sk(sk);
ep = sp->ep;
/* connect() cannot be done on a socket that is already in ESTABLISHED
* state - UDP-style peeled off socket or a TCP-style socket that
* is already connected.
* It cannot be done even on a TCP-style listening socket.
*/
if (sctp_sstate(sk, ESTABLISHED) ||
(sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
err = -EISCONN;
goto out_free;
}
/* Walk through the addrs buffer and count the number of addresses. */
addr_buf = kaddrs;
while (walk_size < addrs_size) {
sa_addr = (struct sockaddr *)addr_buf;
af = sctp_get_af_specific(sa_addr->sa_family);
/* If the address family is not supported or if this address
* causes the address buffer to overflow return EINVAL.
*/
if (!af || (walk_size + af->sockaddr_len) > addrs_size) {
err = -EINVAL;
goto out_free;
}
err = sctp_verify_addr(sk, (union sctp_addr *)sa_addr,
af->sockaddr_len);
if (err)
goto out_free;
memcpy(&to, sa_addr, af->sockaddr_len);
to.v4.sin_port = ntohs(to.v4.sin_port);
/* Check if there already is a matching association on the
* endpoint (other than the one created here).
*/
asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport);
if (asoc2 && asoc2 != asoc) {
if (asoc2->state >= SCTP_STATE_ESTABLISHED)
err = -EISCONN;
else
err = -EALREADY;
goto out_free;
}
/* If we could not find a matching association on the endpoint,
* make sure that there is no peeled-off association matching
* the peer address even on another socket.
*/
if (sctp_endpoint_is_peeled_off(ep, &to)) {
err = -EADDRNOTAVAIL;
goto out_free;
}
if (!asoc) {
/* If a bind() or sctp_bindx() is not called prior to
* an sctp_connectx() call, the system picks an
* ephemeral port and will choose an address set
* equivalent to binding with a wildcard address.
*/
if (!ep->base.bind_addr.port) {
if (sctp_autobind(sk)) {
err = -EAGAIN;
goto out_free;
}
}
scope = sctp_scope(&to);
asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
if (!asoc) {
err = -ENOMEM;
goto out_free;
}
}
/* Prime the peer's transport structures. */
transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL,
SCTP_UNKNOWN);
if (!transport) {
err = -ENOMEM;
goto out_free;
}
addrcnt++;
addr_buf += af->sockaddr_len;
walk_size += af->sockaddr_len;
}
err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL);
if (err < 0) {
goto out_free;
}
err = sctp_primitive_ASSOCIATE(asoc, NULL);
if (err < 0) {
goto out_free;
}
/* Initialize sk's dport and daddr for getpeername() */
inet_sk(sk)->dport = htons(asoc->peer.port);
af = sctp_get_af_specific(to.sa.sa_family);
af->to_sk_daddr(&to, sk);
timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK);
err = sctp_wait_for_connect(asoc, &timeo);
/* Don't free association on exit. */
asoc = NULL;
out_free:
SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p"
" kaddrs: %p err: %d\n",
asoc, kaddrs, err);
if (asoc)
sctp_association_free(asoc);
return err;
}
/* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
*
* API 8.9
* int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt);
*
* If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
* If the sd is an IPv6 socket, the addresses passed can either be IPv4
* or IPv6 addresses.
*
* A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
* Section 3.1.2 for this usage.
*
* addrs is a pointer to an array of one or more socket addresses. Each
* address is contained in its appropriate structure (i.e. struct
* sockaddr_in or struct sockaddr_in6) the family of the address type
* must be used to distengish the address length (note that this
* representation is termed a "packed array" of addresses). The caller
* specifies the number of addresses in the array with addrcnt.
*
* On success, sctp_connectx() returns 0. On failure, sctp_connectx() returns
* -1, and sets errno to the appropriate error code.
*
* For SCTP, the port given in each socket address must be the same, or
* sctp_connectx() will fail, setting errno to EINVAL.
*
* An application can use sctp_connectx to initiate an association with
* an endpoint that is multi-homed. Much like sctp_bindx() this call
* allows a caller to specify multiple addresses at which a peer can be
* reached. The way the SCTP stack uses the list of addresses to set up
* the association is implementation dependant. This function only
* specifies that the stack will try to make use of all the addresses in
* the list when needed.
*
* Note that the list of addresses passed in is only used for setting up
* the association. It does not necessarily equal the set of addresses
* the peer uses for the resulting association. If the caller wants to
* find out the set of peer addresses, it must use sctp_getpaddrs() to
* retrieve them after the association has been set up.
*
* Basically do nothing but copying the addresses from user to kernel
* land and invoking either sctp_connectx(). This is used for tunneling
* the sctp_connectx() request through sctp_setsockopt() from userspace.
*
* We don't use copy_from_user() for optimization: we first do the
* sanity checks (buffer size -fast- and access check-healthy
* pointer); if all of those succeed, then we can alloc the memory
* (expensive operation) needed to copy the data to kernel. Then we do
* the copying without checking the user space area
* (__copy_from_user()).
*
* On exit there is no need to do sockfd_put(), sys_setsockopt() does
* it.
*
* sk The sk of the socket
* addrs The pointer to the addresses in user land
* addrssize Size of the addrs buffer
*
* Returns 0 if ok, <0 errno code on error.
*/
SCTP_STATIC int sctp_setsockopt_connectx(struct sock* sk,
struct sockaddr __user *addrs,
int addrs_size)
{
int err = 0;
struct sockaddr *kaddrs;
SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n",
__FUNCTION__, sk, addrs, addrs_size);
if (unlikely(addrs_size <= 0))
return -EINVAL;
/* Check the user passed a healthy pointer. */
if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size)))
return -EFAULT;
/* Alloc space for the address array in kernel memory. */
kaddrs = (struct sockaddr *)kmalloc(addrs_size, GFP_KERNEL);
if (unlikely(!kaddrs))
return -ENOMEM;
if (__copy_from_user(kaddrs, addrs, addrs_size)) {
err = -EFAULT;
} else {
err = __sctp_connect(sk, kaddrs, addrs_size);
}
kfree(kaddrs);
return err;
}
/* API 3.1.4 close() - UDP Style Syntax
* Applications use close() to perform graceful shutdown (as described in
* Section 10.1 of [SCTP]) on ALL the associations currently represented
@ -1095,7 +1337,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
sp = sctp_sk(sk);
ep = sp->ep;
SCTP_DEBUG_PRINTK("Using endpoint: %s.\n", ep->debug_name);
SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep);
/* We cannot send a message over a TCP-style listening socket. */
if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) {
@ -1306,7 +1548,7 @@ SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk,
}
/* Prime the peer's transport structures. */
transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL);
transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN);
if (!transport) {
err = -ENOMEM;
goto out_free;
@ -2208,6 +2450,12 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
optlen, SCTP_BINDX_REM_ADDR);
break;
case SCTP_SOCKOPT_CONNECTX:
/* 'optlen' is the size of the addresses buffer. */
retval = sctp_setsockopt_connectx(sk, (struct sockaddr __user *)optval,
optlen);
break;
case SCTP_DISABLE_FRAGMENTS:
retval = sctp_setsockopt_disable_fragments(sk, optval, optlen);
break;
@ -2283,112 +2531,29 @@ out_nounlock:
*
* len: the size of the address.
*/
SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *uaddr,
SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *addr,
int addr_len)
{
struct sctp_sock *sp;
struct sctp_endpoint *ep;
struct sctp_association *asoc;
struct sctp_transport *transport;
union sctp_addr to;
struct sctp_af *af;
sctp_scope_t scope;
long timeo;
int err = 0;
struct sctp_af *af;
sctp_lock_sock(sk);
SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d)\n",
__FUNCTION__, sk, uaddr, addr_len);
SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n",
__FUNCTION__, sk, addr, addr_len);
sp = sctp_sk(sk);
ep = sp->ep;
/* connect() cannot be done on a socket that is already in ESTABLISHED
* state - UDP-style peeled off socket or a TCP-style socket that
* is already connected.
* It cannot be done even on a TCP-style listening socket.
*/
if (sctp_sstate(sk, ESTABLISHED) ||
(sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
err = -EISCONN;
goto out_unlock;
/* Validate addr_len before calling common connect/connectx routine. */
af = sctp_get_af_specific(addr->sa_family);
if (!af || addr_len < af->sockaddr_len) {
err = -EINVAL;
} else {
/* Pass correct addr len to common routine (so it knows there
* is only one address being passed.
*/
err = __sctp_connect(sk, addr, af->sockaddr_len);
}
err = sctp_verify_addr(sk, (union sctp_addr *)uaddr, addr_len);
if (err)
goto out_unlock;
if (addr_len > sizeof(to))
addr_len = sizeof(to);
memcpy(&to, uaddr, addr_len);
to.v4.sin_port = ntohs(to.v4.sin_port);
asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport);
if (asoc) {
if (asoc->state >= SCTP_STATE_ESTABLISHED)
err = -EISCONN;
else
err = -EALREADY;
goto out_unlock;
}
/* If we could not find a matching association on the endpoint,
* make sure that there is no peeled-off association matching the
* peer address even on another socket.
*/
if (sctp_endpoint_is_peeled_off(ep, &to)) {
err = -EADDRNOTAVAIL;
goto out_unlock;
}
/* If a bind() or sctp_bindx() is not called prior to a connect()
* call, the system picks an ephemeral port and will choose an address
* set equivalent to binding with a wildcard address.
*/
if (!ep->base.bind_addr.port) {
if (sctp_autobind(sk)) {
err = -EAGAIN;
goto out_unlock;
}
}
scope = sctp_scope(&to);
asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
if (!asoc) {
err = -ENOMEM;
goto out_unlock;
}
/* Prime the peer's transport structures. */
transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL);
if (!transport) {
sctp_association_free(asoc);
goto out_unlock;
}
err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL);
if (err < 0) {
sctp_association_free(asoc);
goto out_unlock;
}
err = sctp_primitive_ASSOCIATE(asoc, NULL);
if (err < 0) {
sctp_association_free(asoc);
goto out_unlock;
}
/* Initialize sk's dport and daddr for getpeername() */
inet_sk(sk)->dport = htons(asoc->peer.port);
af = sctp_get_af_specific(to.sa.sa_family);
af->to_sk_daddr(&to, sk);
timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK);
err = sctp_wait_for_connect(asoc, &timeo);
out_unlock:
sctp_release_sock(sk);
return err;
}
@ -2677,12 +2842,15 @@ static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
/* Map ipv4 address into v4-mapped-on-v6 address. */
sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk),
(union sctp_addr *)&status.sstat_primary.spinfo_address);
status.sstat_primary.spinfo_state = transport->active;
status.sstat_primary.spinfo_state = transport->state;
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;
if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
status.sstat_primary.spinfo_state = SCTP_ACTIVE;
if (put_user(len, optlen)) {
retval = -EFAULT;
goto out;
@ -2733,12 +2901,15 @@ static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
return -EINVAL;
pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
pinfo.spinfo_state = transport->active;
pinfo.spinfo_state = transport->state;
pinfo.spinfo_cwnd = transport->cwnd;
pinfo.spinfo_srtt = transport->srtt;
pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
pinfo.spinfo_mtu = transport->pmtu;
if (pinfo.spinfo_state == SCTP_UNKNOWN)
pinfo.spinfo_state = SCTP_ACTIVE;
if (put_user(len, optlen)) {
retval = -EFAULT;
goto out;
@ -3591,7 +3762,8 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
int retval = 0;
int len;
SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p, ...)\n", sk);
SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p... optname: %d)\n",
sk, optname);
/* I can hardly begin to describe how wrong this is. This is
* so broken as to be worse than useless. The API draft
@ -4596,8 +4768,7 @@ out:
return err;
do_error:
if (asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1 >=
asoc->max_init_attempts)
if (asoc->init_err_counter + 1 >= asoc->max_init_attempts)
err = -ETIMEDOUT;
else
err = -ECONNREFUSED;

4
net/sctp/transport.c
View File

@ -83,7 +83,9 @@ static struct sctp_transport *sctp_transport_init(struct sctp_transport *peer,
peer->last_time_used = jiffies;
peer->last_time_ecne_reduced = jiffies;
peer->active = SCTP_ACTIVE;
peer->init_sent_count = 0;
peer->state = SCTP_ACTIVE;
peer->hb_allowed = 0;
/* Initialize the default path max_retrans. */