5 files changed, 62 insertions, 101 deletions

diff --git a/include/net/sctp/constants.h b/include/net/sctp/constants.h
index 58f714a3b670..63908840eef0 100644
--- a/include/net/sctp/constants.h
+++ b/include/net/sctp/constants.h
@@ -308,6 +308,10 @@ enum { SCTP_MAX_GABS = 16 };
 
 #define SCTP_DEFAULT_MINWINDOW  1500    /* default minimum rwnd size */
 #define SCTP_DEFAULT_MAXWINDOW  65535   /* default rwnd size */
+#define SCTP_DEFAULT_RWND_SHIFT  4      /* by default, update on 1/16 of
+                                         * rcvbuf, which is 1/8 of initial
+                                         * window
+                                         */
 #define SCTP_DEFAULT_MAXSEGMENT 1500    /* MTU size, this is the limit
                                          * to which we will raise the P-MTU.
                                          */
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 8a6d5297de16..78740ec57d5d 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -227,8 +227,7 @@ DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
 #endif /* !TEST_FRAME */
 
 /* sctp mib definitions */
-enum
-{
+enum {
         SCTP_MIB_NUM = 0,
         SCTP_MIB_CURRESTAB,                     /* CurrEstab */
         SCTP_MIB_ACTIVEESTABS,                  /* ActiveEstabs */
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index c1dd89365833..851c813adb3a 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -243,7 +243,8 @@ struct sctp_chunk *sctp_make_op_error(const struct sctp_association *,
                                  const struct sctp_chunk *chunk,
                                  __be16 cause_code,
                                  const void *payload,
-                                 size_t paylen);
+                                 size_t paylen,
+                                 size_t reserve_tail);
 
 struct sctp_chunk *sctp_make_asconf_update_ip(struct sctp_association *,
                                               union sctp_addr *,
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index cd2e18778f81..ff3017744711 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -231,6 +231,11 @@ extern struct sctp_globals {
         /* Flag to indicate whether computing and verifying checksum
          * is disabled. */
         int checksum_disable;
+
+        /* Threshold for rwnd update SACKS.  Receive buffer shifted this many
+         * bits is an indicator of when to send and window update SACK.
+         */
+        int rwnd_update_shift;
 } sctp_globals;
 
 #define sctp_rto_initial                (sctp_globals.rto_initial)
@@ -267,6 +272,7 @@ extern struct sctp_globals {
 #define sctp_prsctp_enable              (sctp_globals.prsctp_enable)
 #define sctp_auth_enable                (sctp_globals.auth_enable)
 #define sctp_checksum_disable           (sctp_globals.checksum_disable)
+#define sctp_rwnd_upd_shift             (sctp_globals.rwnd_update_shift)
 
 /* SCTP Socket type: UDP or TCP style. */
 typedef enum {
@@ -893,7 +899,6 @@ struct sctp_transport {
          */
         /* RTO         : The current retransmission timeout value.  */
         unsigned long rto;
-        unsigned long last_rto;
 
         __u32 rtt;              /* This is the most recent RTT.  */
 
@@ -936,6 +941,8 @@ struct sctp_transport {
         /* Data that has been sent, but not acknowledged. */
         __u32 flight_size;
 
+        __u32 burst_limited;    /* Holds old cwnd when max.burst is applied */
+
         /* TSN marking the fast recovery exit point */
         __u32 fast_recovery_exit;
 
@@ -944,12 +951,6 @@ struct sctp_transport {
         /* Source address. */
         union sctp_addr saddr;
 
-        /* When was the last time(in jiffies) that a data packet was sent on
-         * this transport?  This is used to adjust the cwnd when the transport
-         * becomes inactive.
-         */
-        unsigned long last_time_used;
-
         /* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
          * the destination address every heartbeat interval.
          */
@@ -988,7 +989,7 @@ struct sctp_transport {
         int init_sent_count;
 
         /* state       : The current state of this destination,
-         *             : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKOWN.
+         *             : i.e. SCTP_ACTIVE, SCTP_INACTIVE, SCTP_UNKNOWN.
          */
         int state;
 
@@ -1070,6 +1071,8 @@ void sctp_transport_put(struct sctp_transport *);
 void sctp_transport_update_rto(struct sctp_transport *, __u32);
 void sctp_transport_raise_cwnd(struct sctp_transport *, __u32, __u32);
 void sctp_transport_lower_cwnd(struct sctp_transport *, sctp_lower_cwnd_t);
+void sctp_transport_burst_limited(struct sctp_transport *);
+void sctp_transport_burst_reset(struct sctp_transport *);
 unsigned long sctp_transport_timeout(struct sctp_transport *);
 void sctp_transport_reset(struct sctp_transport *);
 void sctp_transport_update_pmtu(struct sctp_transport *, u32);
diff --git a/include/net/sctp/user.h b/include/net/sctp/user.h
index be2334aaf52e..2b2769c5ca9f 100644
--- a/include/net/sctp/user.h
+++ b/include/net/sctp/user.h
@@ -60,96 +60,49 @@ typedef __s32 sctp_assoc_t;
 /* The following symbols come from the Sockets API Extensions for
  * SCTP <draft-ietf-tsvwg-sctpsocket-07.txt>.
  */
-enum sctp_optname {
-        SCTP_RTOINFO,
-#define SCTP_RTOINFO SCTP_RTOINFO
-        SCTP_ASSOCINFO,
-#define SCTP_ASSOCINFO SCTP_ASSOCINFO
-        SCTP_INITMSG,
-#define SCTP_INITMSG SCTP_INITMSG
-        SCTP_NODELAY,   /* Get/set nodelay option. */
-#define SCTP_NODELAY    SCTP_NODELAY
-        SCTP_AUTOCLOSE,
-#define SCTP_AUTOCLOSE SCTP_AUTOCLOSE
-        SCTP_SET_PEER_PRIMARY_ADDR, 
-#define SCTP_SET_PEER_PRIMARY_ADDR SCTP_SET_PEER_PRIMARY_ADDR
-        SCTP_PRIMARY_ADDR,
-#define SCTP_PRIMARY_ADDR SCTP_PRIMARY_ADDR
-        SCTP_ADAPTATION_LAYER,
-#define SCTP_ADAPTATION_LAYER SCTP_ADAPTATION_LAYER
-        SCTP_DISABLE_FRAGMENTS,
-#define SCTP_DISABLE_FRAGMENTS SCTP_DISABLE_FRAGMENTS
-        SCTP_PEER_ADDR_PARAMS,
-#define SCTP_PEER_ADDR_PARAMS SCTP_PEER_ADDR_PARAMS
-        SCTP_DEFAULT_SEND_PARAM,
-#define SCTP_DEFAULT_SEND_PARAM SCTP_DEFAULT_SEND_PARAM
-        SCTP_EVENTS,
-#define SCTP_EVENTS SCTP_EVENTS
-        SCTP_I_WANT_MAPPED_V4_ADDR,  /* Turn on/off mapped v4 addresses  */
-#define SCTP_I_WANT_MAPPED_V4_ADDR SCTP_I_WANT_MAPPED_V4_ADDR
-        SCTP_MAXSEG,    /* Get/set maximum fragment. */
-#define SCTP_MAXSEG     SCTP_MAXSEG
-        SCTP_STATUS,
-#define SCTP_STATUS SCTP_STATUS
-        SCTP_GET_PEER_ADDR_INFO,
-#define SCTP_GET_PEER_ADDR_INFO SCTP_GET_PEER_ADDR_INFO
-        SCTP_DELAYED_ACK,
-#define SCTP_DELAYED_ACK_TIME SCTP_DELAYED_ACK
-#define SCTP_DELAYED_ACK SCTP_DELAYED_ACK
-        SCTP_CONTEXT,   /* Receive Context */
-#define SCTP_CONTEXT SCTP_CONTEXT
-        SCTP_FRAGMENT_INTERLEAVE,
-#define SCTP_FRAGMENT_INTERLEAVE SCTP_FRAGMENT_INTERLEAVE
-        SCTP_PARTIAL_DELIVERY_POINT,    /* Set/Get partial delivery point */
-#define SCTP_PARTIAL_DELIVERY_POINT SCTP_PARTIAL_DELIVERY_POINT
-        SCTP_MAX_BURST,         /* Set/Get max burst */
-#define SCTP_MAX_BURST SCTP_MAX_BURST
-        SCTP_AUTH_CHUNK,        /* Set only: add a chunk type to authenticat */
-#define SCTP_AUTH_CHUNK SCTP_AUTH_CHUNK
-        SCTP_HMAC_IDENT,
-#define SCTP_HMAC_IDENT SCTP_HMAC_IDENT
-        SCTP_AUTH_KEY,
-#define SCTP_AUTH_KEY SCTP_AUTH_KEY
-        SCTP_AUTH_ACTIVE_KEY,
-#define SCTP_AUTH_ACTIVE_KEY SCTP_AUTH_ACTIVE_KEY
-        SCTP_AUTH_DELETE_KEY,
-#define SCTP_AUTH_DELETE_KEY SCTP_AUTH_DELETE_KEY
-        SCTP_PEER_AUTH_CHUNKS,          /* Read only */
-#define SCTP_PEER_AUTH_CHUNKS SCTP_PEER_AUTH_CHUNKS
-        SCTP_LOCAL_AUTH_CHUNKS,         /* Read only */
-#define SCTP_LOCAL_AUTH_CHUNKS SCTP_LOCAL_AUTH_CHUNKS
-        SCTP_GET_ASSOC_NUMBER,          /* Read only */
-#define SCTP_GET_ASSOC_NUMBER SCTP_GET_ASSOC_NUMBER
-
-
-        /* Internal Socket Options. Some of the sctp library functions are 
-         * implemented using these socket options.
-         */
-        SCTP_SOCKOPT_BINDX_ADD = 100,/* BINDX requests for adding addresses. */
-#define SCTP_SOCKOPT_BINDX_ADD  SCTP_SOCKOPT_BINDX_ADD
-        SCTP_SOCKOPT_BINDX_REM, /* BINDX requests for removing addresses. */
-#define SCTP_SOCKOPT_BINDX_REM  SCTP_SOCKOPT_BINDX_REM
-        SCTP_SOCKOPT_PEELOFF,   /* peel off association. */
-#define SCTP_SOCKOPT_PEELOFF    SCTP_SOCKOPT_PEELOFF
-        SCTP_GET_PEER_ADDRS_NUM_OLD,    /* Get number of peer addresss. */
-#define SCTP_GET_PEER_ADDRS_NUM_OLD     SCTP_GET_PEER_ADDRS_NUM_OLD
-        SCTP_GET_PEER_ADDRS_OLD,        /* Get all peer addresss. */
-#define SCTP_GET_PEER_ADDRS_OLD SCTP_GET_PEER_ADDRS_OLD
-        SCTP_GET_LOCAL_ADDRS_NUM_OLD,   /* Get number of local addresss. */
-#define SCTP_GET_LOCAL_ADDRS_NUM_OLD    SCTP_GET_LOCAL_ADDRS_NUM_OLD
-        SCTP_GET_LOCAL_ADDRS_OLD,       /* Get all local addresss. */
-#define SCTP_GET_LOCAL_ADDRS_OLD        SCTP_GET_LOCAL_ADDRS_OLD
-        SCTP_SOCKOPT_CONNECTX_OLD, /* CONNECTX old requests. */
-#define SCTP_SOCKOPT_CONNECTX_OLD       SCTP_SOCKOPT_CONNECTX_OLD
-        SCTP_GET_PEER_ADDRS,    /* Get all peer addresss. */
-#define SCTP_GET_PEER_ADDRS     SCTP_GET_PEER_ADDRS
-        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
-        SCTP_SOCKOPT_CONNECTX3, /* CONNECTX requests. (new implementation) */
-#define SCTP_SOCKOPT_CONNECTX3  SCTP_SOCKOPT_CONNECTX3
-};
+#define SCTP_RTOINFO    0
+#define SCTP_ASSOCINFO  1
+#define SCTP_INITMSG    2
+#define SCTP_NODELAY    3               /* Get/set nodelay option. */
+#define SCTP_AUTOCLOSE  4
+#define SCTP_SET_PEER_PRIMARY_ADDR 5
+#define SCTP_PRIMARY_ADDR       6
+#define SCTP_ADAPTATION_LAYER   7
+#define SCTP_DISABLE_FRAGMENTS  8
+#define SCTP_PEER_ADDR_PARAMS   9
+#define SCTP_DEFAULT_SEND_PARAM 10
+#define SCTP_EVENTS     11
+#define SCTP_I_WANT_MAPPED_V4_ADDR 12   /* Turn on/off mapped v4 addresses  */
+#define SCTP_MAXSEG     13              /* Get/set maximum fragment. */
+#define SCTP_STATUS     14
+#define SCTP_GET_PEER_ADDR_INFO 15
+#define SCTP_DELAYED_ACK_TIME   16
+#define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
+#define SCTP_CONTEXT    17
+#define SCTP_FRAGMENT_INTERLEAVE        18
+#define SCTP_PARTIAL_DELIVERY_POINT     19 /* Set/Get partial delivery point */
+#define SCTP_MAX_BURST  20              /* Set/Get max burst */
+#define SCTP_AUTH_CHUNK 21      /* Set only: add a chunk type to authenticate */
+#define SCTP_HMAC_IDENT 22
+#define SCTP_AUTH_KEY   23
+#define SCTP_AUTH_ACTIVE_KEY    24
+#define SCTP_AUTH_DELETE_KEY    25
+#define SCTP_PEER_AUTH_CHUNKS   26      /* Read only */
+#define SCTP_LOCAL_AUTH_CHUNKS  27      /* Read only */
+#define SCTP_GET_ASSOC_NUMBER   28      /* Read only */
+
+/* Internal Socket Options. Some of the sctp library functions are
+ * implemented using these socket options.
+ */
+#define SCTP_SOCKOPT_BINDX_ADD  100     /* BINDX requests for adding addrs */
+#define SCTP_SOCKOPT_BINDX_REM  101     /* BINDX requests for removing addrs. */
+#define SCTP_SOCKOPT_PEELOFF    102     /* peel off association. */
+/* Options 104-106 are deprecated and removed. Do not use this space */
+#define SCTP_SOCKOPT_CONNECTX_OLD       107     /* CONNECTX old requests. */
+#define SCTP_GET_PEER_ADDRS     108             /* Get all peer addresss. */
+#define SCTP_GET_LOCAL_ADDRS    109             /* Get all local addresss. */
+#define SCTP_SOCKOPT_CONNECTX   110             /* CONNECTX requests. */
+#define SCTP_SOCKOPT_CONNECTX3  111     /* CONNECTX requests (updated) */
 
 /*
  * 5.2.1 SCTP Initiation Structure (SCTP_INIT)
@@ -206,6 +159,7 @@ enum sctp_sinfo_flags {
         SCTP_UNORDERED = 1,  /* Send/receive message unordered. */
         SCTP_ADDR_OVER = 2,  /* Override the primary destination. */
         SCTP_ABORT=4,        /* Send an ABORT message to the peer. */
+        SCTP_SACK_IMMEDIATELY = 8,      /* SACK should be sent without delay */
         SCTP_EOF=MSG_FIN,    /* Initiate graceful shutdown process. */  
 };