Merge master.kernel.org:/pub/scm/linux/kernel/git/sridhar/lksctp-2.6

include/net/sctp/sctp.h

@@ -175,6 +175,8 @@ void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
 void sctp_icmp_proto_unreachable(struct sock *sk,
 				 struct sctp_association *asoc,
 				 struct sctp_transport *t);
+void sctp_backlog_migrate(struct sctp_association *assoc,
+			  struct sock *oldsk, struct sock *newsk);
 
 /*
  *  Section:  Macros, externs, and inlines

include/net/sctp/structs.h

@@ -127,9 +127,9 @@ extern struct sctp_globals {
 	 * RTO.Alpha		    - 1/8  (3 when converted to right shifts.)
 	 * RTO.Beta		    - 1/4  (2 when converted to right shifts.)
 	 */
-	__u32 rto_initial;
-	__u32 rto_min;
-	__u32 rto_max;
+	unsigned long rto_initial;
+	unsigned long rto_min;
+	unsigned long rto_max;
 
 	/* Note: rto_alpha and rto_beta are really defined as inverse
 	 * powers of two to facilitate integer operations.
@@ -140,12 +140,18 @@ extern struct sctp_globals {
 	/* Max.Burst		    - 4 */
 	int max_burst;
 
-	/* Valid.Cookie.Life	    - 60  seconds  */
-	int valid_cookie_life;
-
 	/* Whether Cookie Preservative is enabled(1) or not(0) */
 	int cookie_preserve_enable;
 
+	/* Valid.Cookie.Life	    - 60  seconds  */
+	unsigned long valid_cookie_life;
+
+	/* Delayed SACK timeout  200ms default*/
+	unsigned long sack_timeout;
+
+	/* HB.interval		    - 30 seconds  */
+	unsigned long hb_interval;
+
 	/* Association.Max.Retrans  - 10 attempts
 	 * Path.Max.Retrans	    - 5	 attempts (per destination address)
 	 * Max.Init.Retransmits	    - 8	 attempts
@@ -168,12 +174,6 @@ extern struct sctp_globals {
 	 */
 	int rcvbuf_policy;
 
-	/* Delayed SACK timeout  200ms default*/
-	int sack_timeout;
-
-	/* HB.interval		    - 30 seconds  */
-	int hb_interval;
-
 	/* The following variables are implementation specific.	 */
 
 	/* Default initialization values to be applied to new associations. */
@@ -405,8 +405,9 @@ struct sctp_cookie {
 /* The format of our cookie that we send to our peer. */
 struct sctp_signed_cookie {
 	__u8 signature[SCTP_SECRET_SIZE];
+	__u32 __pad;		/* force sctp_cookie alignment to 64 bits */
 	struct sctp_cookie c;
-};
+} __attribute__((packed));
 
 /* This is another convenience type to allocate memory for address
  * params for the maximum size and pass such structures around
@@ -827,7 +828,7 @@ struct sctp_transport {
 	__u32 rtt;		/* This is the most recent RTT.	 */
 
 	/* RTO	       : The current retransmission timeout value.  */
-	__u32 rto;
+	unsigned long rto;
 
 	/* RTTVAR      : The current RTT variation.  */
 	__u32 rttvar;
@@ -877,22 +878,10 @@ struct sctp_transport {
 	/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
 	 * the destination address every heartbeat interval.
 	 */
-	__u32 hbinterval;
-
-	/* This is the max_retrans value for the transport and will
-	 * be initialized from the assocs value.  This can be changed
-	 * using SCTP_SET_PEER_ADDR_PARAMS socket option.
-	 */
-	__u16 pathmaxrxt;
-
-	/* PMTU	      : The current known path MTU.  */
-	__u32 pathmtu;
+	unsigned long hbinterval;
 
 	/* SACK delay timeout */
-	__u32 sackdelay;
-
-	/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
-	__u32 param_flags;
+	unsigned long sackdelay;
 
 	/* When was the last time (in jiffies) that we heard from this
 	 * transport?  We use this to pick new active and retran paths.
@@ -904,6 +893,18 @@ struct sctp_transport {
 	 */
 	unsigned long last_time_ecne_reduced;
 
+	/* This is the max_retrans value for the transport and will
+	 * be initialized from the assocs value.  This can be changed
+	 * using SCTP_SET_PEER_ADDR_PARAMS socket option.
+	 */
+	__u16 pathmaxrxt;
+
+	/* PMTU	      : The current known path MTU.  */
+	__u32 pathmtu;
+
+	/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
+	__u32 param_flags;
+
 	/* The number of times INIT has been sent on this transport. */
 	int init_sent_count;
 
@@ -1249,6 +1250,14 @@ struct sctp_endpoint {
 	int last_key;
 	int key_changed_at;
 
+ 	/* digest:  This is a digest of the sctp cookie.  This field is
+ 	 * 	    only used on the receive path when we try to validate
+ 	 * 	    that the cookie has not been tampered with.  We put
+ 	 * 	    this here so we pre-allocate this once and can re-use
+ 	 * 	    on every receive.
+ 	 */
+ 	__u8 digest[SCTP_SIGNATURE_SIZE];
+ 
 	/* sendbuf acct. policy.	*/
 	__u32 sndbuf_policy;
 
@@ -1499,9 +1508,9 @@ struct sctp_association {
 	 * These values will be initialized by system defaults, but can
 	 * be modified via the SCTP_RTOINFO socket option.
 	 */
-	__u32 rto_initial;
-	__u32 rto_max;
-	__u32 rto_min;
+	unsigned long rto_initial;
+	unsigned long rto_max;
+	unsigned long rto_min;
 
 	/* Maximum number of new data packets that can be sent in a burst.  */
 	int max_burst;
@@ -1519,13 +1528,13 @@ struct sctp_association {
 	__u16 init_retries;
 
 	/* The largest timeout or RTO value to use in attempting an INIT */
-	__u16 max_init_timeo;
+	unsigned long max_init_timeo;
 
 	/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
 	 * the destination address every heartbeat interval. This value
 	 * will be inherited by all new transports.
 	 */
-	__u32 hbinterval;
+	unsigned long hbinterval;
 
 	/* This is the max_retrans value for new transports in the
 	 * association.
@@ -1537,13 +1546,14 @@ struct sctp_association {
 	 */
 	__u32 pathmtu;
 
-	/* SACK delay timeout */
-	__u32 sackdelay;
-
 	/* Flags controling Heartbeat, SACK delay, and Path MTU Discovery. */
 	__u32 param_flags;
 
-	int timeouts[SCTP_NUM_TIMEOUT_TYPES];
+	/* SACK delay timeout */
+	unsigned long sackdelay;
+
+
+	unsigned long timeouts[SCTP_NUM_TIMEOUT_TYPES];
 	struct timer_list timers[SCTP_NUM_TIMEOUT_TYPES];
 
 	/* Transport to which SHUTDOWN chunk was last sent.  */
@@ -1648,7 +1658,10 @@ struct sctp_association {
 	/* How many duplicated TSNs have we seen?  */
 	int numduptsns;
 
-	/* Number of seconds of idle time before an association is closed.  */
+	/* Number of seconds of idle time before an association is closed.
+	 * In the association context, this is really used as a boolean
+	 * since the real timeout is stored in the timeouts array
+	 */
 	__u32 autoclose;
 
 	/* These are to support

net/sctp/input.c

@@ -257,20 +257,26 @@ int sctp_rcv(struct sk_buff *skb)
 	 */
 	sctp_bh_lock_sock(sk);
 
+	/* It is possible that the association could have moved to a different
+	 * socket if it is peeled off. If so, update the sk.
+	 */ 
+	if (sk != rcvr->sk) {
+		sctp_bh_lock_sock(rcvr->sk);
+		sctp_bh_unlock_sock(sk);
+		sk = rcvr->sk;
+	}
+
 	if (sock_owned_by_user(sk))
 		sk_add_backlog(sk, skb);
 	else
 		sctp_backlog_rcv(sk, skb);
 
-	/* Release the sock and any reference counts we took in the
-	 * lookup calls.
+	/* Release the sock and the sock ref we took in the lookup calls.
+	 * The asoc/ep ref will be released in sctp_backlog_rcv.
 	 */
 	sctp_bh_unlock_sock(sk);
-	if (asoc)
-		sctp_association_put(asoc);
-	else
-		sctp_endpoint_put(ep);
 	sock_put(sk);
+
 	return ret;
 
 discard_it:
@@ -296,12 +302,50 @@ int sctp_rcv(struct sk_buff *skb)
 int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
 {
 	struct sctp_chunk *chunk = SCTP_INPUT_CB(skb)->chunk;
-	struct sctp_inq *inqueue = &chunk->rcvr->inqueue;
-
-	sctp_inq_push(inqueue, chunk);
+ 	struct sctp_inq *inqueue = NULL;
+ 	struct sctp_ep_common *rcvr = NULL;
+
+ 	rcvr = chunk->rcvr;
+
+	BUG_TRAP(rcvr->sk == sk);
+
+ 	if (rcvr->dead) {
+ 		sctp_chunk_free(chunk);
+ 	} else {
+ 		inqueue = &chunk->rcvr->inqueue;
+ 		sctp_inq_push(inqueue, chunk);
+ 	}
+
+	/* Release the asoc/ep ref we took in the lookup calls in sctp_rcv. */ 
+ 	if (SCTP_EP_TYPE_ASSOCIATION == rcvr->type)
+ 		sctp_association_put(sctp_assoc(rcvr));
+ 	else
+ 		sctp_endpoint_put(sctp_ep(rcvr));
+  
         return 0;
 }
 
+void sctp_backlog_migrate(struct sctp_association *assoc, 
+			  struct sock *oldsk, struct sock *newsk)
+{
+	struct sk_buff *skb;
+	struct sctp_chunk *chunk;
+
+	skb = oldsk->sk_backlog.head;
+	oldsk->sk_backlog.head = oldsk->sk_backlog.tail = NULL;
+	while (skb != NULL) {
+		struct sk_buff *next = skb->next;
+
+		chunk = SCTP_INPUT_CB(skb)->chunk;
+		skb->next = NULL;
+		if (&assoc->base == chunk->rcvr)
+			sk_add_backlog(newsk, skb);
+		else
+			sk_add_backlog(oldsk, skb);
+		skb = next;
+	}
+}
+
 /* Handle icmp frag needed error. */
 void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
 			   struct sctp_transport *t, __u32 pmtu)
@@ -544,10 +588,16 @@ int sctp_rcv_ootb(struct sk_buff *skb)
 	sctp_errhdr_t *err;
 
 	ch = (sctp_chunkhdr_t *) skb->data;
-	ch_end = ((__u8 *) ch) + WORD_ROUND(ntohs(ch->length));
 
 	/* Scan through all the chunks in the packet.  */
-	while (ch_end > (__u8 *)ch && ch_end < skb->tail) {
+	do {
+		/* Break out if chunk length is less then minimal. */
+		if (ntohs(ch->length) < sizeof(sctp_chunkhdr_t))
+			break;
+
+		ch_end = ((__u8 *)ch) + WORD_ROUND(ntohs(ch->length));
+		if (ch_end > skb->tail)
+			break;
 
 		/* RFC 8.4, 2) If the OOTB packet contains an ABORT chunk, the
 		 * receiver MUST silently discard the OOTB packet and take no
@@ -578,8 +628,7 @@ int sctp_rcv_ootb(struct sk_buff *skb)
 		}
 
 		ch = (sctp_chunkhdr_t *) ch_end;
-	        ch_end = ((__u8 *) ch) + WORD_ROUND(ntohs(ch->length));
-	}
+	} while (ch_end < skb->tail);
 
 	return 0;
 

net/sctp/inqueue.c

@@ -73,8 +73,10 @@ void sctp_inq_free(struct sctp_inq *queue)
 	/* If there is a packet which is currently being worked on,
 	 * free it as well.
 	 */
-	if (queue->in_progress)
+	if (queue->in_progress) {
 		sctp_chunk_free(queue->in_progress);
+		queue->in_progress = NULL;
+	}
 
 	if (queue->malloced) {
 		/* Dump the master memory segment.  */

net/sctp/proc.c

@@ -176,7 +176,7 @@ static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_associa
 
 static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 {
-	if (*pos > sctp_ep_hashsize)
+	if (*pos >= sctp_ep_hashsize)
 		return NULL;
 
 	if (*pos < 0)
@@ -185,8 +185,6 @@ static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
 	if (*pos == 0)
 		seq_printf(seq, " ENDPT     SOCK   STY SST HBKT LPORT   UID INODE LADDRS\n");
 
-	++*pos;
-
 	return (void *)pos;
 }
 
@@ -198,11 +196,9 @@ static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
 
 static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
-	if (*pos > sctp_ep_hashsize)
+	if (++*pos >= sctp_ep_hashsize)
 		return NULL;
 
-	++*pos;
-
 	return pos;
 }
 
@@ -214,19 +210,19 @@ static int sctp_eps_seq_show(struct seq_file *seq, void *v)
 	struct sctp_ep_common *epb;
 	struct sctp_endpoint *ep;
 	struct sock *sk;
-	int    hash = *(int *)v;
+	int    hash = *(loff_t *)v;
 
-	if (hash > sctp_ep_hashsize)
+	if (hash >= sctp_ep_hashsize)
 		return -ENOMEM;
 
-	head = &sctp_ep_hashtable[hash-1];
+	head = &sctp_ep_hashtable[hash];
 	sctp_local_bh_disable();
 	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 %5d %5lu ", ep, sk,
-			   sctp_sk(sk)->type, sk->sk_state, hash-1,
+			   sctp_sk(sk)->type, sk->sk_state, hash,
 			   epb->bind_addr.port,
 			   sock_i_uid(sk), sock_i_ino(sk));
 
@@ -283,7 +279,7 @@ void sctp_eps_proc_exit(void)
 
 static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 {
-	if (*pos > sctp_assoc_hashsize)
+	if (*pos >= sctp_assoc_hashsize)
 		return NULL;
 
 	if (*pos < 0)
@@ -293,8 +289,6 @@ static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
 		seq_printf(seq, " ASSOC     SOCK   STY SST ST HBKT ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
 				"RPORT LADDRS <-> RADDRS\n");
 
-	++*pos;
-
 	return (void *)pos;
 }
 
@@ -306,11 +300,9 @@ static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
 
 static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
-	if (*pos > sctp_assoc_hashsize)
+	if (++*pos >= sctp_assoc_hashsize)
 		return NULL;
 
-	++*pos;
-
 	return pos;
 }
 
@@ -321,12 +313,12 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 	struct sctp_ep_common *epb;
 	struct sctp_association *assoc;
 	struct sock *sk;
-	int    hash = *(int *)v;
+	int    hash = *(loff_t *)v;
 
-	if (hash > sctp_assoc_hashsize)
+	if (hash >= sctp_assoc_hashsize)
 		return -ENOMEM;
 
-	head = &sctp_assoc_hashtable[hash-1];
+	head = &sctp_assoc_hashtable[hash];
 	sctp_local_bh_disable();
 	read_lock(&head->lock);
 	for (epb = head->chain; epb; epb = epb->next) {
@@ -335,7 +327,7 @@ static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
 		seq_printf(seq,
 			   "%8p %8p %-3d %-3d %-2d %-4d %4d %8d %8d %7d %5lu %-5d %5d ",
 			   assoc, sk, sctp_sk(sk)->type, sk->sk_state,
-			   assoc->state, hash-1, assoc->assoc_id,
+			   assoc->state, hash, assoc->assoc_id,
 			   (sk->sk_rcvbuf - assoc->rwnd),
 			   assoc->sndbuf_used,
 			   sock_i_uid(sk), sock_i_ino(sk),

net/sctp/sm_make_chunk.c

@@ -1275,7 +1275,12 @@ static sctp_cookie_param_t *sctp_pack_cookie(const struct sctp_endpoint *ep,
 	unsigned int keylen;
 	char *key;
 
-	headersize = sizeof(sctp_paramhdr_t) + SCTP_SECRET_SIZE;
+	/* Header size is static data prior to the actual cookie, including
+	 * any padding.
+	 */
+	headersize = sizeof(sctp_paramhdr_t) + 
+		     (sizeof(struct sctp_signed_cookie) - 
+		      sizeof(struct sctp_cookie));
 	bodysize = sizeof(struct sctp_cookie)
 		+ ntohs(init_chunk->chunk_hdr->length) + addrs_len;
 
@@ -1354,7 +1359,7 @@ struct sctp_association *sctp_unpack_cookie(
 	struct sctp_signed_cookie *cookie;
 	struct sctp_cookie *bear_cookie;
 	int headersize, bodysize, fixed_size;
-	__u8 digest[SCTP_SIGNATURE_SIZE];
+	__u8 *digest = ep->digest;
 	struct scatterlist sg;
 	unsigned int keylen, len;
 	char *key;
@@ -1362,7 +1367,12 @@ struct sctp_association *sctp_unpack_cookie(
 	struct sk_buff *skb = chunk->skb;
 	struct timeval tv;
 
-	headersize = sizeof(sctp_chunkhdr_t) + SCTP_SECRET_SIZE;
+	/* Header size is static data prior to the actual cookie, including
+	 * any padding.
+	 */
+	headersize = sizeof(sctp_chunkhdr_t) +
+		     (sizeof(struct sctp_signed_cookie) - 
+		      sizeof(struct sctp_cookie));
 	bodysize = ntohs(chunk->chunk_hdr->length) - headersize;
 	fixed_size = headersize + sizeof(struct sctp_cookie);
 

net/sctp/sm_sideeffect.c

@@ -1300,7 +1300,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
 					"T1 INIT Timeout adjustment"
 					" init_err_counter: %d"
 					" cycle: %d"
-					" timeout: %d\n",
+					" timeout: %ld\n",
 					asoc->init_err_counter,
 					asoc->init_cycle,
 					asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_INIT]);
@@ -1328,7 +1328,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
 			SCTP_DEBUG_PRINTK(
 				"T1 COOKIE Timeout adjustment"
 				" init_err_counter: %d"
-				" timeout: %d\n",
+				" timeout: %ld\n",
 				asoc->init_err_counter,
 				asoc->timeouts[SCTP_EVENT_TIMEOUT_T1_COOKIE]);
 

net/sctp/sm_statefuns.c

@@ -3090,6 +3090,8 @@ sctp_disposition_t sctp_sf_ootb(const struct sctp_endpoint *ep,
 			break;
 
 		ch_end = ((__u8 *)ch) + WORD_ROUND(ntohs(ch->length));
+		if (ch_end > skb->tail)
+			break;
 
 		if (SCTP_CID_SHUTDOWN_ACK == ch->type)
 			ootb_shut_ack = 1;

net/sctp/socket.c

@@ -2995,7 +2995,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 	sp->hbinterval  = jiffies_to_msecs(sctp_hb_interval);
 	sp->pathmaxrxt  = sctp_max_retrans_path;
 	sp->pathmtu     = 0; // allow default discovery
-	sp->sackdelay   = sctp_sack_timeout;
+	sp->sackdelay   = jiffies_to_msecs(sctp_sack_timeout);
 	sp->param_flags = SPP_HB_ENABLE |
 	                  SPP_PMTUD_ENABLE |
 	                  SPP_SACKDELAY_ENABLE;
@@ -5602,8 +5602,12 @@ static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
 	 */
 	newsp->type = type;
 
+	spin_lock_bh(&oldsk->sk_lock.slock);
+	/* Migrate the backlog from oldsk to newsk. */
+	sctp_backlog_migrate(assoc, oldsk, newsk);
 	/* Migrate the association to the new socket. */
 	sctp_assoc_migrate(assoc, newsk);
+	spin_unlock_bh(&oldsk->sk_lock.slock);
 
 	/* If the association on the newsk is already closed before accept()
 	 * is called, set RCV_SHUTDOWN flag.

net/sctp/sysctl.c

@@ -159,12 +159,9 @@ static ctl_table sctp_table[] = {
 		.ctl_name	= NET_SCTP_PRESERVE_ENABLE,
 		.procname	= "cookie_preserve_enable",
 		.data		= &sctp_cookie_preserve_enable,
-		.maxlen		= sizeof(long),
+		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
-		.strategy	= &sctp_sysctl_jiffies_ms,
-		.extra1         = &rto_timer_min,
-		.extra2         = &rto_timer_max
+		.proc_handler	= &proc_dointvec
 	},
 	{
 		.ctl_name	= NET_SCTP_RTO_ALPHA,

net/sctp/transport.c

@@ -350,7 +350,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
 	tp->rto_pending = 0;
 
 	SCTP_DEBUG_PRINTK("%s: transport: %p, rtt: %d, srtt: %d "
-			  "rttvar: %d, rto: %d\n", __FUNCTION__,
+			  "rttvar: %d, rto: %ld\n", __FUNCTION__,
 			  tp, rtt, tp->srtt, tp->rttvar, tp->rto);
 }