Merge http://linux-lksctp.bkbits.net/lksctp-2.5

into nuts.ninka.net:/home/davem/src/BK/net-2.5

include/linux/sctp.h

@@ -471,13 +471,54 @@ typedef struct sctp_cwr_chunk {
 	sctp_cwrhdr_t cwr_hdr;
 } sctp_cwr_chunk_t __attribute__((packed));
 
-
-/* FIXME:  Cleanup needs to continue below this line. */
-
 /*
  * ADDIP Section 3.1 New Chunk Types
  */
 
+/* ADDIP
+ * Section 3.1.1 Address Configuration Change Chunk (ASCONF)
+ *
+ * 	Serial Number: 32 bits (unsigned integer)
+ *	This value represents a Serial Number for the ASCONF Chunk. The
+ *	valid range of Serial Number is from 0 to 2^32-1.
+ *	Serial Numbers wrap back to 0 after reaching 2^32 -1.
+ *
+ *	Address Parameter: 8 or 20 bytes (depending on type)
+ *	The address is an address of the sender of the ASCONF chunk,
+ *	the address MUST be considered part of the association by the
+ *	peer endpoint. This field may be used by the receiver of the 
+ *	ASCONF to help in finding the association. This parameter MUST
+ *	be present in every ASCONF message i.e. it is a mandatory TLV
+ *	parameter.
+ *
+ *	ASCONF Parameter: TLV format
+ *	Each Address configuration change is represented by a TLV
+ *	parameter as defined in Section 3.2. One or more requests may
+ *	be present in an ASCONF Chunk.
+ *
+ * Section 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK)
+ * 
+ *	Serial Number: 32 bits (unsigned integer)
+ *	This value represents the Serial Number for the received ASCONF
+ *	Chunk that is acknowledged by this chunk. This value is copied
+ *	from the received ASCONF Chunk. 
+ *
+ *	ASCONF Parameter Response: TLV format
+ *	The ASCONF Parameter Response is used in the ASCONF-ACK to
+ *	report status of ASCONF processing.
+ */
+typedef struct sctp_addiphdr {
+	__u32	serial;
+	__u8	params[0];
+} sctp_addiphdr_t __attribute__((packed));
+
+typedef struct sctp_addip_chunk {
+	sctp_chunkhdr_t chunk_hdr;
+	sctp_addiphdr_t addip_hdr;
+} sctp_addip_chunk_t __attribute__((packed));
+
+/* FIXME:  Cleanup needs to continue below this line. */
+
 
 /* ADDIP Section 3.1.1
  *

include/net/sctp/command.h

@@ -87,6 +87,7 @@ typedef enum {
 	SCTP_CMD_RTO_PENDING,	 /* Set transport's rto_pending. */
 	SCTP_CMD_PART_DELIVER,	 /* Partial data delivery considerations. */
 	SCTP_CMD_RENEGE,         /* Renege data on an association. */
+	SCTP_CMD_SETUP_T4,	 /* ADDIP, setup T4 RTO timer parms. */
 	SCTP_CMD_LAST
 } sctp_verb_t;
 

include/net/sctp/constants.h

@@ -75,6 +75,9 @@ enum { SCTP_DEFAULT_INSTREAMS = SCTP_MAX_STREAM };
 #define SCTP_NUM_BASE_CHUNK_TYPES	(SCTP_CID_BASE_MAX + 1)
 #define SCTP_NUM_CHUNK_TYPES		(SCTP_NUM_BASE_CHUNKTYPES + 2)
 
+#define SCTP_CID_ADDIP_MIN		SCTP_CID_ASCONF
+#define SCTP_CID_ADDIP_MAX		SCTP_CID_ASCONF_ACK
+#define SCTP_NUM_ADDIP_CHUNK_TYPES	2
 
 /* These are the different flavours of event.  */
 typedef enum {
@@ -99,6 +102,7 @@ typedef enum {
 	SCTP_EVENT_TIMEOUT_T1_INIT,
 	SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
 	SCTP_EVENT_TIMEOUT_T3_RTX,
+	SCTP_EVENT_TIMEOUT_T4_RTO,
 	SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
 	SCTP_EVENT_TIMEOUT_HEARTBEAT,
 	SCTP_EVENT_TIMEOUT_SACK,
@@ -122,9 +126,10 @@ typedef enum {
 	SCTP_PRIMITIVE_ABORT,
 	SCTP_PRIMITIVE_SEND,
 	SCTP_PRIMITIVE_REQUESTHEARTBEAT,
+	SCTP_PRIMITIVE_ASCONF,
 } sctp_event_primitive_t;
 
-#define SCTP_EVENT_PRIMITIVE_MAX	SCTP_PRIMITIVE_REQUESTHEARTBEAT
+#define SCTP_EVENT_PRIMITIVE_MAX	SCTP_PRIMITIVE_ASCONF
 #define SCTP_NUM_PRIMITIVE_TYPES	(SCTP_EVENT_PRIMITIVE_MAX + 1)
 
 /* We define here a utility type for manipulating subtypes.

include/net/sctp/sm.h

@@ -117,6 +117,7 @@ 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_t2_timer_expire;
+sctp_state_fn_t sctp_sf_t4_timer_expire;
 sctp_state_fn_t sctp_sf_t5_timer_expire;
 sctp_state_fn_t sctp_sf_sendbeat_8_3;
 sctp_state_fn_t sctp_sf_beat_8_3;
@@ -137,6 +138,8 @@ sctp_state_fn_t sctp_sf_unk_chunk;
 sctp_state_fn_t sctp_sf_do_8_5_1_E_sa;
 sctp_state_fn_t sctp_sf_cookie_echoed_err;
 sctp_state_fn_t sctp_sf_do_5_2_6_stale;
+sctp_state_fn_t sctp_sf_do_asconf;
+sctp_state_fn_t sctp_sf_do_asconf_ack;
 
 /* Prototypes for primitive event state functions.  */
 sctp_state_fn_t sctp_sf_do_prm_asoc;
@@ -154,6 +157,7 @@ sctp_state_fn_t sctp_sf_error_closed;
 sctp_state_fn_t sctp_sf_error_shutdown;
 sctp_state_fn_t sctp_sf_ignore_primitive;
 sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
+sctp_state_fn_t sctp_sf_do_prm_asconf;
 
 /* Prototypes for other event state functions.  */
 sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
@@ -184,10 +188,6 @@ sctp_state_fn_t sctp_do_9_2_reshutack;
 sctp_state_fn_t sctp_do_8_3_hb_err;
 sctp_state_fn_t sctp_heartoff;
 
-/* Prototypes for addip related state functions.  Not in use. */
-sctp_state_fn_t sctp_addip_do_asconf;
-sctp_state_fn_t sctp_addip_do_asconf_ack;
-
 /* Prototypes for utility support functions.  */
 __u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
 const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t,
@@ -260,6 +260,14 @@ struct sctp_chunk *sctp_make_op_error(const struct sctp_association *,
 				 __u16 cause_code,
 				 const void *payload,
 				 size_t paylen);
+
+struct sctp_chunk *sctp_make_asconf(struct sctp_association *asoc,
+				    union sctp_addr *addr,
+				    int vparam_len);
+struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
+				       struct sctp_chunk *asconf,
+				       int vparam_len);
+
 void sctp_chunk_assign_tsn(struct sctp_chunk *);
 void sctp_chunk_assign_ssn(struct sctp_chunk *);
 

include/net/sctp/structs.h

@@ -169,11 +169,11 @@ extern struct sctp_globals {
 
 	/* This is the hash of all endpoints. */
 	int ep_hashsize;
-	struct sctp_hashbucket *ep_hashbucket;
+	struct sctp_hashbucket *ep_hashtable;
 
 	/* This is the hash of all associations. */
 	int assoc_hashsize;
-	struct sctp_hashbucket *assoc_hashbucket;
+	struct sctp_hashbucket *assoc_hashtable;
 
 	/* This is the sctp port control hash.	*/
 	int port_hashsize;
@@ -207,9 +207,9 @@ extern struct sctp_globals {
 #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_ep_hashtable		(sctp_globals.ep_hashtable)
 #define sctp_assoc_hashsize		(sctp_globals.assoc_hashsize)
-#define sctp_assoc_hashbucket		(sctp_globals.assoc_hashbucket)
+#define sctp_assoc_hashtable		(sctp_globals.assoc_hashtable)
 #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)
@@ -571,6 +571,7 @@ struct sctp_chunk {
 		struct sctp_ecnehdr *ecne_hdr;
 		struct sctp_cwrhdr *ecn_cwr_hdr;
 		struct sctp_errhdr *err_hdr;
+		struct sctp_addiphdr *addip_hdr;
 	} subh;
 
 	__u8 *chunk_end;
@@ -1385,8 +1386,10 @@ struct sctp_association {
 		int cookie_len;
 		void *cookie;
 
-		/* ADDIP Extention (ADDIP)		--xguo */
-		/* <expected peer-serial-number> minus 1 (ADDIP sec. 4.2 C1) */
+		/* ADDIP Section 4.2 Upon reception of an ASCONF Chunk.
+		 * C1) ... "Peer-Serial-Number'. This value MUST be initialized to the
+		 * Initial TSN Value minus 1
+		 */
 		__u32 addip_serial;
 	} peer;
 
@@ -1623,12 +1626,12 @@ struct sctp_association {
 	/* ADDIP Section 4.1 ASCONF Chunk Procedures
 	 *
 	 * A2) A serial number should be assigned to the Chunk. The
-	 * serial number should be a monotonically increasing
-	 * number. All serial numbers are defined to be initialized at
+	 * serial number SHOULD be a monotonically increasing
+	 * number. The serial number SHOULD be initialized at
 	 * the start of the association to the same value as the
-	 * Initial TSN.
-	 *
-	 * [and]
+	 * Initial TSN and every time a new ASCONF chunk is created
+	 * it is incremented by one after assigning the serial number
+	 * to the newly created chunk.
 	 *
 	 * ADDIP
 	 * 3.1.1  Address/Stream Configuration Change Chunk (ASCONF)
@@ -1637,14 +1640,11 @@ struct sctp_association {
 	 *
 	 * This value represents a Serial Number for the ASCONF
 	 * Chunk. The valid range of Serial Number is from 0 to
-	 * 4294967295 (2**32 - 1).  Serial Numbers wrap back to 0
+	 * 4294967295 (2^32 - 1).  Serial Numbers wrap back to 0
 	 * after reaching 4294967295.
 	 */
 	__u32 addip_serial;
 
-	/* Is the ADDIP extension enabled for this association? */
-	char addip_enable;
-
 	/* Need to send an ECNE Chunk? */
 	char need_ecne;
 

net/sctp/associola.c

@@ -221,12 +221,14 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
 	 * remote endpoint it should do the following:
 	 * ...
 	 * A2) a serial number should be assigned to the chunk. The serial
-	 * number should be a monotonically increasing number. All serial
-	 * numbers are defined to be initialized at the start of the
+	 * number SHOULD be a monotonically increasing number. The serial
+	 * numbers SHOULD be initialized at the start of the
 	 * association to the same value as the initial TSN.
 	 */
 	asoc->addip_serial = asoc->c.initial_tsn;
 
+	skb_queue_head_init(&asoc->addip_chunks);
+
 	/* Make an empty list of remote transport addresses.  */
 	INIT_LIST_HEAD(&asoc->peer.transport_addr_list);
 
@@ -264,8 +266,6 @@ struct sctp_association *sctp_association_init(struct sctp_association *asoc,
 	/* Set up the tsn tracking. */
 	sctp_tsnmap_init(&asoc->peer.tsn_map, SCTP_TSN_MAP_SIZE, 0);
 
-	skb_queue_head_init(&asoc->addip_chunks);
-
 	asoc->need_ecne = 0;
 
 	asoc->eyecatcher = SCTP_ASSOC_EYECATCHER;

net/sctp/debug.c

@@ -185,6 +185,7 @@ static const char *sctp_timer_tbl[] = {
 	"TIMEOUT_T1_INIT",
 	"TIMEOUT_T2_SHUTDOWN",
 	"TIMEOUT_T3_RTX",
+	"TIMEOUT_T4_RTO",
 	"TIMEOUT_T5_SHUTDOWN_GUARD",
 	"TIMEOUT_HEARTBEAT",
 	"TIMEOUT_SACK",

net/sctp/endpointola.c

@@ -131,6 +131,7 @@ struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
 	ep->timeouts[SCTP_EVENT_TIMEOUT_T2_SHUTDOWN] =
 		sp->rtoinfo.srto_initial * HZ / 1000;
 	ep->timeouts[SCTP_EVENT_TIMEOUT_T3_RTX] = 0;
+	ep->timeouts[SCTP_EVENT_TIMEOUT_T4_RTO] = 0;
 
 	/* sctpimpguide-05 Section 2.12.2
 	 * If the 'T5-shutdown-guard' timer is used, it SHOULD be set to the

net/sctp/input.c

@@ -528,7 +528,7 @@ void __sctp_hash_endpoint(struct sctp_endpoint *ep)
 	epb = &ep->base;
 
 	epb->hashent = sctp_ep_hashfn(epb->bind_addr.port);
-	head = &sctp_ep_hashbucket[epb->hashent];
+	head = &sctp_ep_hashtable[epb->hashent];
 
 	sctp_write_lock(&head->lock);
 	epp = &head->chain;
@@ -558,7 +558,7 @@ void __sctp_unhash_endpoint(struct sctp_endpoint *ep)
 
 	epb->hashent = sctp_ep_hashfn(epb->bind_addr.port);
 
-	head = &sctp_ep_hashbucket[epb->hashent];
+	head = &sctp_ep_hashtable[epb->hashent];
 
 	sctp_write_lock(&head->lock);
 
@@ -589,7 +589,7 @@ struct sctp_endpoint *__sctp_rcv_lookup_endpoint(const union sctp_addr *laddr)
 	int hash;
 
 	hash = sctp_ep_hashfn(laddr->v4.sin_port);
-	head = &sctp_ep_hashbucket[hash];
+	head = &sctp_ep_hashtable[hash];
 	read_lock(&head->lock);
 	for (epb = head->chain; epb; epb = epb->next) {
 		ep = sctp_ep(epb);
@@ -627,7 +627,7 @@ void __sctp_hash_established(struct sctp_association *asoc)
 	/* Calculate which chain this entry will belong to. */
 	epb->hashent = sctp_assoc_hashfn(epb->bind_addr.port, asoc->peer.port);
 
-	head = &sctp_assoc_hashbucket[epb->hashent];
+	head = &sctp_assoc_hashtable[epb->hashent];
 
 	sctp_write_lock(&head->lock);
 	epp = &head->chain;
@@ -658,7 +658,7 @@ void __sctp_unhash_established(struct sctp_association *asoc)
 	epb->hashent = sctp_assoc_hashfn(epb->bind_addr.port,
 					 asoc->peer.port);
 
-	head = &sctp_assoc_hashbucket[epb->hashent];
+	head = &sctp_assoc_hashtable[epb->hashent];
 
 	sctp_write_lock(&head->lock);
 
@@ -688,7 +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_assoc_hashbucket[hash];
+	head = &sctp_assoc_hashtable[hash];
 	read_lock(&head->lock);
 	for (epb = head->chain; epb; epb = epb->next) {
 		asoc = sctp_assoc(epb);

net/sctp/proc.c

@@ -172,7 +172,7 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 
 	seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT LADDRS\n");
 	for (hash = 0; hash < sctp_ep_hashsize; hash++) {
-		head = &sctp_ep_hashbucket[hash];
+		head = &sctp_ep_hashtable[hash];
 		read_lock(&head->lock);
 		for (epb = head->chain; epb; epb = epb->next) {
 			ep = sctp_ep(epb);
@@ -234,7 +234,7 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 	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];
+		head = &sctp_assoc_hashtable[hash];
 		read_lock(&head->lock);
 		for (epb = head->chain; epb; epb = epb->next) {
 			assoc = sctp_assoc(epb);

net/sctp/protocol.c

@@ -934,6 +934,8 @@ __init int sctp_init(void)
 {
 	int i;
 	int status = 0;
+	unsigned long goal;
+	int order;
 
 	/* SCTP_DEBUG sanity check. */
 	if (!sctp_sanity_check())
@@ -1017,52 +1019,75 @@ __init int sctp_init(void)
 	sctp_max_instreams    		= SCTP_DEFAULT_INSTREAMS;
 	sctp_max_outstreams   		= SCTP_DEFAULT_OUTSTREAMS;
 
-	/* Allocate and initialize the association hash table.  */
-	sctp_assoc_hashsize = 4096;
-	sctp_assoc_hashbucket = (struct sctp_hashbucket *)
-		kmalloc(4096 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
-	if (!sctp_assoc_hashbucket) {
+	/* Size and allocate the association hash table.
+	 * The methodology is similar to that of the tcp hash tables.
+	 */
+	if (num_physpages >= (128 * 1024))
+		goal = num_physpages >> (22 - PAGE_SHIFT);
+	else
+		goal = num_physpages >> (24 - PAGE_SHIFT);
+
+	for (order = 0; (1UL << order) < goal; order++)
+		;
+
+	do {
+		sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
+					sizeof(struct sctp_hashbucket);
+		if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
+			continue;
+		sctp_assoc_hashtable = (struct sctp_hashbucket *)
+					__get_free_pages(GFP_ATOMIC, order);
+	} while (!sctp_assoc_hashtable && --order > 0);
+	if (!sctp_assoc_hashtable) {
 		printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
 		status = -ENOMEM;
 		goto err_ahash_alloc;
 	}
 	for (i = 0; i < sctp_assoc_hashsize; i++) {
-		sctp_assoc_hashbucket[i].lock = RW_LOCK_UNLOCKED;
-		sctp_assoc_hashbucket[i].chain = NULL;
+		sctp_assoc_hashtable[i].lock = RW_LOCK_UNLOCKED;
+		sctp_assoc_hashtable[i].chain = NULL;
 	}
 
 	/* Allocate and initialize the endpoint hash table.  */
 	sctp_ep_hashsize = 64;
-	sctp_ep_hashbucket = (struct sctp_hashbucket *)
+	sctp_ep_hashtable = (struct sctp_hashbucket *)
 		kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
-	if (!sctp_ep_hashbucket) {
+	if (!sctp_ep_hashtable) {
 		printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
 		status = -ENOMEM;
 		goto err_ehash_alloc;
 	}
-
 	for (i = 0; i < sctp_ep_hashsize; i++) {
-		sctp_ep_hashbucket[i].lock = RW_LOCK_UNLOCKED;
-		sctp_ep_hashbucket[i].chain = NULL;
+		sctp_ep_hashtable[i].lock = RW_LOCK_UNLOCKED;
+		sctp_ep_hashtable[i].chain = NULL;
 	}
 
 	/* Allocate and initialize the SCTP port hash table.  */
-	sctp_port_hashsize = 4096;
-	sctp_port_hashtable = (struct sctp_bind_hashbucket *)
-		kmalloc(4096 * sizeof(struct sctp_bind_hashbucket),GFP_KERNEL);
+	do {
+		sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
+					sizeof(struct sctp_bind_hashbucket);
+		if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
+			continue;
+		sctp_port_hashtable = (struct sctp_bind_hashbucket *)
+					__get_free_pages(GFP_ATOMIC, order);
+	} while (!sctp_port_hashtable && --order > 0);
 	if (!sctp_port_hashtable) {
 		printk(KERN_ERR "SCTP: Failed bind hash alloc.");
 		status = -ENOMEM;
 		goto err_bhash_alloc;
 	}
-
-	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_port_alloc_lock = SPIN_LOCK_UNLOCKED;
+	sctp_port_rover = sysctl_local_port_range[0] - 1;
+
+	printk(KERN_INFO "SCTP: Hash tables configured "
+			 "(established %d bind %d)\n",
+		sctp_assoc_hashsize, sctp_port_hashsize);
+
 	sctp_sysctl_register();
 
 	INIT_LIST_HEAD(&sctp_address_families);
@@ -1096,11 +1121,15 @@ __init int sctp_init(void)
 err_v6_init:
 	sctp_sysctl_unregister();
 	list_del(&sctp_ipv4_specific.list);
-	kfree(sctp_port_hashtable);
+	free_pages((unsigned long)sctp_port_hashtable,
+		   get_order(sctp_port_hashsize *
+			     sizeof(struct sctp_bind_hashbucket)));
 err_bhash_alloc:
-	kfree(sctp_ep_hashbucket);
+	kfree(sctp_ep_hashtable);
 err_ehash_alloc:
-	kfree(sctp_assoc_hashbucket);
+	free_pages((unsigned long)sctp_assoc_hashtable,
+		   get_order(sctp_assoc_hashsize *
+			     sizeof(struct sctp_hashbucket)));
 err_ahash_alloc:
 	sctp_dbg_objcnt_exit();
 	sctp_proc_exit();
@@ -1136,9 +1165,13 @@ __exit void sctp_exit(void)
 	sctp_sysctl_unregister();
 	list_del(&sctp_ipv4_specific.list);
 
-	kfree(sctp_assoc_hashbucket);
-	kfree(sctp_ep_hashbucket);
-	kfree(sctp_port_hashtable);
+	free_pages((unsigned long)sctp_assoc_hashtable,
+		   get_order(sctp_assoc_hashsize *
+			     sizeof(struct sctp_hashbucket)));
+	kfree(sctp_ep_hashtable);
+	free_pages((unsigned long)sctp_port_hashtable,
+		   get_order(sctp_port_hashsize *
+			     sizeof(struct sctp_bind_hashbucket)));
 
 	kmem_cache_destroy(sctp_chunk_cachep);
 	kmem_cache_destroy(sctp_bucket_cachep);

net/sctp/sm_make_chunk.c

@@ -2088,3 +2088,85 @@ int sockaddr2sctp_addr(const union sctp_addr *sa, union sctp_addr_param *p)
 
 	return len;
 }
+
+/*
+ * ADDIP 3.1.1 Address Configuration Change Chunk (ASCONF)
+ *      0                   1                   2                   3
+ *      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     | Type = 0xC1   |  Chunk Flags  |      Chunk Length             |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                       Serial Number                           |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                    Address Parameter                          |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                     ASCONF Parameter #1                       |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     \                                                               \
+ *     /                             ....                              /
+ *     \                                                               \
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                     ASCONF Parameter #N                       |
+ *      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * Address Parameter and other parameter will not be wrapped in this function 
+ */
+struct sctp_chunk *sctp_make_asconf(struct sctp_association *asoc,
+				    union sctp_addr *addr, int vparam_len)
+{
+	sctp_addiphdr_t asconf;
+	struct sctp_chunk *retval;
+	int length = sizeof(asconf) + vparam_len;
+	union sctp_params addrparam;
+	int addrlen;
+
+	addrlen = sockaddr2sctp_addr(addr, (union sctp_addr_param *)&addrparam);
+	if (!addrlen)
+		return NULL;
+	length += addrlen;
+
+	/* Create the chunk.  */
+	retval = sctp_make_chunk(asoc, SCTP_CID_ASCONF, 0, length);
+	if (!retval)
+		return NULL;
+
+	asconf.serial = asoc->addip_serial++;
+
+	retval->subh.addip_hdr =
+		sctp_addto_chunk(retval, sizeof(asconf), &asconf);
+	retval->param_hdr.v =
+		sctp_addto_chunk(retval, addrlen, &addr);
+
+	return retval;
+}
+
+/*
+ * Unpack the parameters in an ASCONF chunk into an association and
+ * generate ASCONF-ACK chunk.
+ *
+ * ADDIP 3.1.2 Address Configuration Acknowledgement Chunk (ASCONF-ACK)
+ *      0                   1                   2                   3
+ *      0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     | Type = 0x80   |  Chunk Flags  |      Chunk Length             |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                       Serial Number                           |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                 ASCONF Parameter Response#1                   |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     \                                                               \
+ *     /                             ....                              /
+ *     \                                                               \
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *     |                 ASCONF Parameter Response#N                   |
+ *     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * All the parameter respoinces will be added in this function.
+ */
+struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
+					struct sctp_chunk *asconf,
+					int vparam_len)
+{
+	// FIXME: process asconf chunk
+	return NULL;
+}

net/sctp/sm_sideeffect.c

@@ -294,6 +294,12 @@ void sctp_generate_t2_shutdown_event(unsigned long data)
 	sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T2_SHUTDOWN);
 }
 
+void sctp_generate_t4_rto_event(unsigned long data)
+{
+	struct sctp_association *asoc = (struct sctp_association *) data;
+	sctp_generate_timeout_event(asoc, SCTP_EVENT_TIMEOUT_T4_RTO);
+}
+
 void sctp_generate_t5_shutdown_guard_event(unsigned long data)
 {
         struct sctp_association *asoc = (struct sctp_association *)data;
@@ -359,6 +365,7 @@ sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES] = {
 	sctp_generate_t1_init_event,
 	sctp_generate_t2_shutdown_event,
 	NULL,
+	sctp_generate_t4_rto_event,
 	sctp_generate_t5_shutdown_guard_event,
 	sctp_generate_heartbeat_event,
 	sctp_generate_sack_event,
@@ -666,6 +673,23 @@ static void sctp_cmd_delete_tcb(sctp_cmd_seq_t *cmds,
 	sctp_association_free(asoc);
 }
 
+/*
+ * ADDIP Section 4.1 ASCONF Chunk Procedures
+ * A4) Start a T-4 RTO timer, using the RTO value of the selected
+ * destination address (normally the primary path; see RFC2960
+ * section 6.4 for details).
+ */
+static void sctp_cmd_setup_t4(sctp_cmd_seq_t *cmds,
+				struct sctp_association *asoc,
+				struct sctp_chunk *chunk)
+{
+	struct sctp_transport *t;
+
+	t = asoc->peer.primary_path;
+	asoc->timeouts[SCTP_EVENT_TIMEOUT_T4_RTO] = t->rto;
+	chunk->transport = t;
+}
+
 /* These three macros allow us to pull the debugging code out of the
  * main flow of sctp_do_sm() to keep attention focused on the real
  * functionality there.
@@ -1177,6 +1201,10 @@ int sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
 					 GFP_ATOMIC);
 			break;
 
+		case SCTP_CMD_SETUP_T4:
+			sctp_cmd_setup_t4(commands, asoc, cmd->obj.ptr);
+			break;
+
 		default:
 			printk(KERN_WARNING "Impossible command: %u, %p\n",
 			       cmd->verb, cmd->obj.ptr);

net/sctp/sm_statefuns.c

@@ -3062,6 +3062,36 @@ sctp_disposition_t sctp_sf_do_8_5_1_E_sa(const struct sctp_endpoint *ep,
 	return sctp_sf_shut_8_4_5(ep, NULL, type, arg, commands);
 }
 
+/*
+ * ADDIP Section 4.2 Upon reception of an ASCONF Chunk
+ * When an endpoint receive an ASCONF Chunk from the remote peer
+ * special procedures MAY be needed to identify the association the
+ * ASCONF Chunk is associated with. To properly find the association
+ * the following procedures should be L1 to L4 and C1 to C5
+ */
+sctp_disposition_t sctp_sf_do_asconf(const struct sctp_endpoint *ep,
+				const struct sctp_association *asoc,
+				const sctp_subtype_t type, void *arg,
+				sctp_cmd_seq_t *commands)
+{
+	// FIXME: Handle the ASCONF chunk
+	return SCTP_DISPOSITION_CONSUME;
+}
+
+/*
+ * ADDIP Section 4.3 General rules for address manipulation
+ * When building TLV parameters for the ASCONF Chunk that will add or
+ * delete IP addresses the D0 to D13 rules should be applied:
+ */
+sctp_disposition_t sctp_sf_do_asconf_ack(const struct sctp_endpoint *ep,
+				const struct sctp_association *asoc,
+				const sctp_subtype_t type, void *arg,
+				sctp_cmd_seq_t *commands)
+{
+	// FIXME: Handle the ASCONF-ACK chunk
+	return SCTP_DISPOSITION_CONSUME;
+}
+
 /*
  * Process an unknown chunk.
  *
@@ -3815,6 +3845,26 @@ sctp_disposition_t sctp_sf_do_prm_requestheartbeat(
 				 commands);
 }
 
+/*
+ * ADDIP Section 4.1 ASCONF Chunk Procedures
+ * When an endpoint has an ASCONF signaled change to be sent to the
+ * remote endpoint it should do A1 to A9
+ */
+sctp_disposition_t sctp_sf_do_prm_asconf(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 *chunk = arg;
+
+	sctp_add_cmd_sf(commands, SCTP_CMD_SETUP_T4, SCTP_CHUNK(chunk));
+	sctp_add_cmd_sf(commands, SCTP_CMD_TIMER_START,
+			SCTP_TO(SCTP_EVENT_TIMEOUT_T4_RTO));
+	sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(chunk));
+	return SCTP_DISPOSITION_CONSUME;
+}
+
 /*
  * Ignore the primitive event
  *
@@ -4213,6 +4263,21 @@ sctp_disposition_t sctp_sf_t2_timer_expire(const struct sctp_endpoint *ep,
 	return SCTP_DISPOSITION_NOMEM;
 }
 
+/*
+ * ADDIP Section 4.1 ASCONF CHunk Procedures
+ * If the T-4 RTO timer expires the endpoint should do B1 to B5
+ */
+sctp_disposition_t sctp_sf_t4_timer_expire(
+	const struct sctp_endpoint *ep,
+	const struct sctp_association *asoc,
+	const sctp_subtype_t type,
+	void *arg,
+	sctp_cmd_seq_t *commands)
+{
+	// FIXME: need to handle t4 expire
+	return SCTP_DISPOSITION_CONSUME;
+}
+
 /* sctpimpguide-05 Section 2.12.2
  * The sender of the SHUTDOWN MAY also start an overall guard timer
  * 'T5-shutdown-guard' to bound the overall time for shutdown sequence.

net/sctp/sm_statetable.c

@@ -436,6 +436,55 @@ const sctp_sm_table_entry_t chunk_event_table[SCTP_NUM_BASE_CHUNK_TYPES][SCTP_ST
 	TYPE_SCTP_SHUTDOWN_COMPLETE,
 }; /* state_fn_t chunk_event_table[][] */
 
+#define TYPE_SCTP_ASCONF { \
+	/* SCTP_STATE_EMPTY */ \
+	{.fn = sctp_sf_ootb, .name = "sctp_sf_ootb"}, \
+	/* 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_do_asconf, .name = "sctp_sf_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"}, \
+} /* TYPE_SCTP_ASCONF */
+
+#define TYPE_SCTP_ASCONF_ACK { \
+	/* SCTP_STATE_EMPTY */ \
+	{.fn = sctp_sf_ootb, .name = "sctp_sf_ootb"}, \
+	/* 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_do_asconf_ack, .name = "sctp_sf_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"}, \
+} /* TYPE_SCTP_ASCONF_ACK */
+
+/* The primary index for this table is the chunk type.
+ * The secondary index for this table is the state.
+ */
+const sctp_sm_table_entry_t addip_chunk_event_table[SCTP_NUM_ADDIP_CHUNK_TYPES][SCTP_STATE_NUM_STATES] = {
+	TYPE_SCTP_ASCONF,
+	TYPE_SCTP_ASCONF_ACK,
+}; /*state_fn_t addip_chunk_event_table[][] */
 
 static const sctp_sm_table_entry_t
 chunk_event_table_unknown[SCTP_STATE_NUM_STATES] = {
@@ -582,6 +631,26 @@ chunk_event_table_unknown[SCTP_STATE_NUM_STATES] = {
 	 .name = "sctp_sf_do_prm_requestheartbeat"},          \
 } /* TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT */
 
+#define TYPE_SCTP_PRIMITIVE_ASCONF { \
+	/* SCTP_STATE_EMPTY */ \
+	{.fn = sctp_sf_bug, .name = "sctp_sf_bug"}, \
+	/* SCTP_STATE_CLOSED */ \
+	{.fn = sctp_sf_error_closed, .name = "sctp_sf_error_closed"}, \
+	/* SCTP_STATE_COOKIE_WAIT */ \
+	{.fn = sctp_sf_error_closed, .name = "sctp_sf_error_closed"}, \
+	/* SCTP_STATE_COOKIE_ECHOED */ \
+	{.fn = sctp_sf_error_closed, .name = "sctp_sf_error_closed"}, \
+	/* SCTP_STATE_ESTABLISHED */ \
+	{.fn = sctp_sf_do_prm_asconf, .name = "sctp_sf_do_prm_asconf"}, \
+	/* SCTP_STATE_SHUTDOWN_PENDING */ \
+	{.fn = sctp_sf_error_shutdown, .name = "sctp_sf_error_shutdown"}, \
+	/* SCTP_STATE_SHUTDOWN_SENT */ \
+	{.fn = sctp_sf_error_shutdown, .name = "sctp_sf_error_shutdown"}, \
+	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
+	{.fn = sctp_sf_error_shutdown, .name = "sctp_sf_error_shutdown"}, \
+	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
+	{.fn = sctp_sf_error_shutdown, .name = "sctp_sf_error_shutdown"}, \
+} /* TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT */
 
 /* The primary index for this table is the primitive type.
  * The secondary index for this table is the state.
@@ -592,6 +661,7 @@ const sctp_sm_table_entry_t primitive_event_table[SCTP_NUM_PRIMITIVE_TYPES][SCTP
 	TYPE_SCTP_PRIMITIVE_ABORT,
 	TYPE_SCTP_PRIMITIVE_SEND,
 	TYPE_SCTP_PRIMITIVE_REQUESTHEARTBEAT,
+	TYPE_SCTP_PRIMITIVE_ASCONF,
 };
 
 #define TYPE_SCTP_OTHER_NO_PENDING_TSN  { \
@@ -726,6 +796,27 @@ const sctp_sm_table_entry_t other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_N
 	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
 }
 
+#define TYPE_SCTP_EVENT_TIMEOUT_T4_RTO { \
+	/* SCTP_STATE_EMPTY */ \
+	{.fn = sctp_sf_bug, .name = "sctp_sf_bug"}, \
+	/* SCTP_STATE_CLOSED */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_COOKIE_WAIT */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_COOKIE_ECHOED */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_ESTABLISHED */ \
+	{.fn = sctp_sf_t4_timer_expire, .name = "sctp_sf_t4_timer_expire"}, \
+	/* SCTP_STATE_SHUTDOWN_PENDING */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_SHUTDOWN_SENT */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_SHUTDOWN_RECEIVED */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+	/* SCTP_STATE_SHUTDOWN_ACK_SENT */ \
+	{.fn = sctp_sf_timer_ignore, .name = "sctp_sf_timer_ignore"}, \
+}
+
 #define TYPE_SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD { \
 	/* SCTP_STATE_EMPTY */ \
 	{.fn = sctp_sf_bug, .name = "sctp_sf_bug"}, \
@@ -817,6 +908,7 @@ const sctp_sm_table_entry_t timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][SCTP_STA
 	TYPE_SCTP_EVENT_TIMEOUT_T1_INIT,
 	TYPE_SCTP_EVENT_TIMEOUT_T2_SHUTDOWN,
 	TYPE_SCTP_EVENT_TIMEOUT_T3_RTX,
+	TYPE_SCTP_EVENT_TIMEOUT_T4_RTO,
 	TYPE_SCTP_EVENT_TIMEOUT_T5_SHUTDOWN_GUARD,
 	TYPE_SCTP_EVENT_TIMEOUT_HEARTBEAT,
 	TYPE_SCTP_EVENT_TIMEOUT_SACK,
@@ -833,5 +925,10 @@ const sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t cid,
 		return &chunk_event_table[cid][state];
 	}
 
+	if (cid >= SCTP_CID_ADDIP_MIN && cid <= SCTP_CID_ADDIP_MAX) {
+		return &addip_chunk_event_table
+			[cid - SCTP_CID_ADDIP_MIN][state];
+	}
+
 	return &chunk_event_table_unknown[state];
 }

net/sctp/socket.c

@@ -455,47 +455,6 @@ int sctp_bindx_add(struct sock *sk, struct sockaddr_storage *addrs, int addrcnt)
 		}
 	}
 
-	/* Notify the peer(s), assuming we have (an) association(s).
-	 * FIXME: for UDP, we have a 1-1-many mapping amongst sk, ep and asoc,
-	 *        so we don't have to do much work on locating associations.
-	 *
-	 * However, when the separation of ep and asoc kicks in, especially
-	 * for TCP style connection, it becomes n-1-n mapping.  We will need
-	 * to do more fine work.  Until then, hold my peace.
-	 *							--xguo
-	 *
-	 * Really, I don't think that will be a problem.  The bind()
-	 * call on a socket will either know the endpoint
-	 * (e.g. TCP-style listen()ing socket, or UDP-style socket),
-	 * or exactly one association.  The former case is EXACTLY
-	 * what we have now.  In the former case we know the
-	 * association already.					--piggy
-	 *
-	 * This code will be working on either a UDP style or a TCP style
-	 * socket, or say either an endpoint or an association. The socket
-	 * type verification code need to be added later before calling the
-	 * ADDIP code.
-	 * 							--daisy
-	 */
-
-#ifdef CONFIG_IP_SCTP_ADDIP
-	/* Add these addresses to all associations on this endpoint.  */
-	if (retval >= 0) {
-		struct list_head *pos;
-		struct sctp_endpoint *ep;
-		struct sctp_association *asoc;
-		ep = sctp_sk(sk)->ep;
-
-		list_for_each(pos, &ep->asocs) {
-			asoc = list_entry(pos, struct sctp_association, asocs);
-
-			sctp_addip_addr_config(asoc,
-					       SCTP_PARAM_ADD_IP,
-					       addrs, addrcnt);
-		}
-	}
-#endif
-
 	return retval;
 }
 
@@ -591,28 +550,6 @@ int sctp_bindx_rem(struct sock *sk, struct sockaddr_storage *addrs, int addrcnt)
 		}
 	}
 
-	/*
-	 * This code will be working on either a UDP style or a TCP style
-	 * socket, * or say either an endpoint or an association. The socket
-	 * type verification code need to be added later before calling the
-	 * ADDIP code.
-	 * 							--daisy
-	 */
-#ifdef CONFIG_IP_SCTP_ADDIP
-	/* Remove these addresses from all associations on this endpoint.  */
-	if (retval >= 0) {
-		struct list_head *pos;
-		struct sctp_endpoint *ep;
-		struct sctp_association *asoc;
-
-		ep = sctp_sk(sk)->ep;
-		list_for_each(pos, &ep->asocs) {
-			asoc = list_entry(pos, struct sctp_association, asocs);
-			sctp_addip_addr_config(asoc, SCTP_PARAM_DEL_IP,
-					       addrs, addrcnt);
-		}
-	}
-#endif
 	return retval;
 }