[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>

1 files changed, 32 insertions, 9 deletions

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 6c24d9cd3d66..dfad4d3c581c 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -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);