1 files changed, 111 insertions, 41 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 1e8132b8c4d9..388d0fb1a377 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2731,17 +2731,57 @@ static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optva
 	return err;
 }
 
-static int sctp_setsockopt_adaption_layer(struct sock *sk, char __user *optval,
+static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
 					  int optlen)
 {
-	struct sctp_setadaption adaption;
+	struct sctp_setadaptation adaptation;
 
-	if (optlen != sizeof(struct sctp_setadaption))
+	if (optlen != sizeof(struct sctp_setadaptation))
 		return -EINVAL;
-	if (copy_from_user(&adaption, optval, optlen)) 
+	if (copy_from_user(&adaptation, optval, optlen))
 		return -EFAULT;
 
-	sctp_sk(sk)->adaption_ind = adaption.ssb_adaption_ind;
+	sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind;
+
+	return 0;
+}
+
+/*
+ * 7.1.29.  Set or Get the default context (SCTP_CONTEXT)
+ *
+ * The context field in the sctp_sndrcvinfo structure is normally only
+ * used when a failed message is retrieved holding the value that was
+ * sent down on the actual send call.  This option allows the setting of
+ * a default context on an association basis that will be received on
+ * reading messages from the peer.  This is especially helpful in the
+ * one-2-many model for an application to keep some reference to an
+ * internal state machine that is processing messages on the
+ * association.  Note that the setting of this value only effects
+ * received messages from the peer and does not effect the value that is
+ * saved with outbound messages.
+ */
+static int sctp_setsockopt_context(struct sock *sk, char __user *optval,
+				   int optlen)
+{
+	struct sctp_assoc_value params;
+	struct sctp_sock *sp;
+	struct sctp_association *asoc;
+
+	if (optlen != sizeof(struct sctp_assoc_value))
+		return -EINVAL;
+	if (copy_from_user(&params, optval, optlen))
+		return -EFAULT;
+
+	sp = sctp_sk(sk);
+
+	if (params.assoc_id != 0) {
+		asoc = sctp_id2assoc(sk, params.assoc_id);
+		if (!asoc)
+			return -EINVAL;
+		asoc->default_rcv_context = params.assoc_value;
+	} else {
+		sp->default_rcv_context = params.assoc_value;
+	}
 
 	return 0;
 }
@@ -2854,8 +2894,11 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
 	case SCTP_MAXSEG:
 		retval = sctp_setsockopt_maxseg(sk, optval, optlen);
 		break;
-	case SCTP_ADAPTION_LAYER:
-		retval = sctp_setsockopt_adaption_layer(sk, optval, optlen);
+	case SCTP_ADAPTATION_LAYER:
+		retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen);
+		break;
+	case SCTP_CONTEXT:
+		retval = sctp_setsockopt_context(sk, optval, optlen);
 		break;
 
 	default:
@@ -3016,6 +3059,8 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 	sp->default_context = 0;
 	sp->default_timetolive = 0;
 
+	sp->default_rcv_context = 0;
+
 	/* Initialize default setup parameters. These parameters
 	 * can be modified with the SCTP_INITMSG socket option or
 	 * overridden by the SCTP_INIT CMSG.
@@ -3078,7 +3123,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 	/* User specified fragmentation limit. */
 	sp->user_frag         = 0;
 
-	sp->adaption_ind = 0;
+	sp->adaptation_ind = 0;
 
 	sp->pf = sctp_get_pf_specific(sk->sk_family);
 
@@ -3821,10 +3866,9 @@ static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
 	sctp_assoc_t id;
 	struct sctp_bind_addr *bp;
 	struct sctp_association *asoc;
-	struct list_head *pos;
+	struct list_head *pos, *temp;
 	struct sctp_sockaddr_entry *addr;
 	rwlock_t *addr_lock;
-	unsigned long flags;
 	int cnt = 0;
 
 	if (len != sizeof(sctp_assoc_t))
@@ -3859,8 +3903,7 @@ static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
 		addr = list_entry(bp->address_list.next,
 				  struct sctp_sockaddr_entry, list);
 		if (sctp_is_any(&addr->a)) {
-			sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
-			list_for_each(pos, &sctp_local_addr_list) {
+			list_for_each_safe(pos, temp, &sctp_local_addr_list) {
 				addr = list_entry(pos,
 						  struct sctp_sockaddr_entry,
 						  list);
@@ -3869,8 +3912,6 @@ static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
 					continue;
 				cnt++;
 			}
-			sctp_spin_unlock_irqrestore(&sctp_local_addr_lock,
-						    flags);
 		} else {
 			cnt = 1;
 		}
@@ -3892,15 +3933,13 @@ done:
 static int sctp_copy_laddrs_to_user_old(struct sock *sk, __u16 port, int max_addrs,
 					void __user *to)
 {
-	struct list_head *pos;
+	struct list_head *pos, *next;
 	struct sctp_sockaddr_entry *addr;
-	unsigned long flags;
 	union sctp_addr temp;
 	int cnt = 0;
 	int addrlen;
 
-	sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
-	list_for_each(pos, &sctp_local_addr_list) {
+	list_for_each_safe(pos, next, &sctp_local_addr_list) {
 		addr = list_entry(pos, struct sctp_sockaddr_entry, list);
 		if ((PF_INET == sk->sk_family) && 
 		    (AF_INET6 == addr->a.sa.sa_family))
@@ -3909,16 +3948,13 @@ static int sctp_copy_laddrs_to_user_old(struct sock *sk, __u16 port, int max_add
 		sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk),
 								&temp);
 		addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len;
-		if (copy_to_user(to, &temp, addrlen)) {
-			sctp_spin_unlock_irqrestore(&sctp_local_addr_lock,
-						    flags);
+		if (copy_to_user(to, &temp, addrlen))
 			return -EFAULT;
-		}
+
 		to += addrlen;
 		cnt ++;
 		if (cnt >= max_addrs) break;
 	}
-	sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
 
 	return cnt;
 }
@@ -3926,15 +3962,13 @@ static int sctp_copy_laddrs_to_user_old(struct sock *sk, __u16 port, int max_add
 static int sctp_copy_laddrs_to_user(struct sock *sk, __u16 port,
 				    void __user **to, size_t space_left)
 {
-	struct list_head *pos;
+	struct list_head *pos, *next;
 	struct sctp_sockaddr_entry *addr;
-	unsigned long flags;
 	union sctp_addr temp;
 	int cnt = 0;
 	int addrlen;
 
-	sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
-	list_for_each(pos, &sctp_local_addr_list) {
+	list_for_each_safe(pos, next, &sctp_local_addr_list) {
 		addr = list_entry(pos, struct sctp_sockaddr_entry, list);
 		if ((PF_INET == sk->sk_family) && 
 		    (AF_INET6 == addr->a.sa.sa_family))
@@ -3945,16 +3979,13 @@ static int sctp_copy_laddrs_to_user(struct sock *sk, __u16 port,
 		addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len;
 		if(space_left<addrlen)
 			return -ENOMEM;
-		if (copy_to_user(*to, &temp, addrlen)) {
-			sctp_spin_unlock_irqrestore(&sctp_local_addr_lock,
-						    flags);
+		if (copy_to_user(*to, &temp, addrlen))
 			return -EFAULT;
-		}
+
 		*to += addrlen;
 		cnt ++;
 		space_left -= addrlen;
 	}
-	sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
 
 	return cnt;
 }
@@ -4179,21 +4210,21 @@ static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
 }
 
 /*
- * 7.1.11  Set Adaption Layer Indicator (SCTP_ADAPTION_LAYER)
+ * 7.1.11  Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
  *
- * Requests that the local endpoint set the specified Adaption Layer
+ * Requests that the local endpoint set the specified Adaptation Layer
  * Indication parameter for all future INIT and INIT-ACK exchanges.
  */
-static int sctp_getsockopt_adaption_layer(struct sock *sk, int len,
+static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
 				  char __user *optval, int __user *optlen)
 {
-	struct sctp_setadaption adaption;
+	struct sctp_setadaptation adaptation;
 
-	if (len != sizeof(struct sctp_setadaption))
+	if (len != sizeof(struct sctp_setadaptation))
 		return -EINVAL;
 
-	adaption.ssb_adaption_ind = sctp_sk(sk)->adaption_ind;
-	if (copy_to_user(optval, &adaption, len))
+	adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
+	if (copy_to_user(optval, &adaptation, len))
 		return -EFAULT;
 
 	return 0;
@@ -4435,6 +4466,42 @@ static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
 }
 
 /*
+ * 7.1.29.  Set or Get the default context (SCTP_CONTEXT)
+ * (chapter and verse is quoted at sctp_setsockopt_context())
+ */
+static int sctp_getsockopt_context(struct sock *sk, int len,
+				   char __user *optval, int __user *optlen)
+{
+	struct sctp_assoc_value params;
+	struct sctp_sock *sp;
+	struct sctp_association *asoc;
+
+	if (len != sizeof(struct sctp_assoc_value))
+		return -EINVAL;
+
+	if (copy_from_user(&params, optval, len))
+		return -EFAULT;
+
+	sp = sctp_sk(sk);
+
+	if (params.assoc_id != 0) {
+		asoc = sctp_id2assoc(sk, params.assoc_id);
+		if (!asoc)
+			return -EINVAL;
+		params.assoc_value = asoc->default_rcv_context;
+	} else {
+		params.assoc_value = sp->default_rcv_context;
+	}
+
+	if (put_user(len, optlen))
+		return -EFAULT;
+	if (copy_to_user(optval, &params, len))
+		return -EFAULT;
+
+	return 0;
+}
+
+/*
  * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG)
  *
  * This socket option specifies the maximum size to put in any outgoing
@@ -4568,10 +4635,13 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
 		retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
 							optlen);
 		break;
-	case SCTP_ADAPTION_LAYER:
-		retval = sctp_getsockopt_adaption_layer(sk, len, optval,
+	case SCTP_ADAPTATION_LAYER:
+		retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
 							optlen);
 		break;
+	case SCTP_CONTEXT:
+		retval = sctp_getsockopt_context(sk, len, optval, optlen);
+		break;
 	default:
 		retval = -ENOPROTOOPT;
 		break;