1 files changed, 57 insertions, 36 deletions

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 314a2fa21d6b..350f250b0dc7 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -177,6 +177,10 @@ struct sctp_sock {
 	 * will be inherited by all new associations.
 	 */
 	__u32 hbinterval;
+	__u32 probe_interval;
+
+	__be16 udp_port;
+	__be16 encap_port;
 
 	/* This is the max_retrans value for new associations. */
 	__u16 pathmaxrxt;
@@ -226,12 +230,14 @@ struct sctp_sock {
 		data_ready_signalled:1;
 
 	atomic_t pd_mode;
+
+	/* Fields after this point will be skipped on copies, like on accept
+	 * and peeloff operations
+	 */
+
 	/* Receive to here while partial delivery is in effect. */
 	struct sk_buff_head pd_lobby;
 
-	/* These must be the last fields, as they will skipped on copies,
-	 * like on accept and peeloff operations
-	 */
 	struct list_head auto_asconf_list;
 	int do_auto_asconf;
 };
@@ -326,7 +332,7 @@ struct sctp_cookie {
 	 * the association TCB is re-constructed from the cookie.
 	 */
 	__u32 raw_addr_list_len;
-	struct sctp_init_chunk peer_init[0];
+	struct sctp_init_chunk peer_init[];
 };
 
 
@@ -380,6 +386,7 @@ struct sctp_sender_hb_info {
 	union sctp_addr daddr;
 	unsigned long sent_at;
 	__u64 hb_nonce;
+	__u32 probe_size;
 };
 
 int sctp_stream_init(struct sctp_stream *stream, __u16 outcnt, __u16 incnt,
@@ -431,23 +438,13 @@ struct sctp_af {
 	int		(*setsockopt)	(struct sock *sk,
 					 int level,
 					 int optname,
-					 char __user *optval,
+					 sockptr_t optval,
 					 unsigned int optlen);
 	int		(*getsockopt)	(struct sock *sk,
 					 int level,
 					 int optname,
 					 char __user *optval,
 					 int __user *optlen);
-	int		(*compat_setsockopt)	(struct sock *sk,
-					 int level,
-					 int optname,
-					 char __user *optval,
-					 unsigned int optlen);
-	int		(*compat_getsockopt)	(struct sock *sk,
-					 int level,
-					 int optname,
-					 char __user *optval,
-					 int __user *optlen);
 	void		(*get_dst)	(struct sctp_transport *t,
 					 union sctp_addr *saddr,
 					 struct flowi *fl,
@@ -466,7 +463,7 @@ struct sctp_af {
 					 int saddr);
 	void		(*from_sk)	(union sctp_addr *,
 					 struct sock *sk);
-	void		(*from_addr_param) (union sctp_addr *,
+	bool		(*from_addr_param) (union sctp_addr *,
 					    union sctp_addr_param *,
 					    __be16 port, int iif);
 	int		(*to_addr_param) (const union sctp_addr *,
@@ -661,6 +658,7 @@ struct sctp_chunk {
 		data_accepted:1,	/* At least 1 chunk accepted */
 		auth:1,			/* IN: was auth'ed | OUT: needs auth */
 		has_asconf:1,		/* IN: have seen an asconf before */
+		pmtu_probe:1,		/* Used by PLPMTUD, can be set in s HB chunk */
 		tsn_missing_report:2,	/* Data chunk missing counter. */
 		fast_retransmit:2;	/* Is this chunk fast retransmitted? */
 };
@@ -863,6 +861,7 @@ struct sctp_transport {
 	 * the destination address every heartbeat interval.
 	 */
 	unsigned long hbinterval;
+	unsigned long probe_interval;
 
 	/* SACK delay timeout */
 	unsigned long sackdelay;
@@ -885,6 +884,8 @@ struct sctp_transport {
 	 */
 	unsigned long last_time_ecne_reduced;
 
+	__be16 encap_port;
+
 	/* This is the max_retrans value for the transport and will
 	 * be initialized from the assocs value.  This can be changed
 	 * using the SCTP_SET_PEER_ADDR_PARAMS socket option.
@@ -937,6 +938,9 @@ struct sctp_transport {
 	/* Timer to handler reconf chunk rtx */
 	struct timer_list reconf_timer;
 
+	/* Timer to send a probe HB packet for PLPMTUD */
+	struct timer_list probe_timer;
+
 	/* Since we're using per-destination retransmission timers
 	 * (see above), we're also using per-destination "transmitted"
 	 * queues.  This probably ought to be a private struct
@@ -979,6 +983,14 @@ struct sctp_transport {
 		char cacc_saw_newack;
 	} cacc;
 
+	struct {
+		__u16 pmtu;
+		__u16 probe_size;
+		__u16 probe_high;
+		__u8 probe_count;
+		__u8 state;
+	} pl; /* plpmtud related */
+
 	/* 64-bit random number sent with heartbeat. */
 	__u64 hb_nonce;
 
@@ -996,6 +1008,8 @@ void sctp_transport_free(struct sctp_transport *);
 void sctp_transport_reset_t3_rtx(struct sctp_transport *);
 void sctp_transport_reset_hb_timer(struct sctp_transport *);
 void sctp_transport_reset_reconf_timer(struct sctp_transport *transport);
+void sctp_transport_reset_probe_timer(struct sctp_transport *transport);
+void sctp_transport_reset_raise_timer(struct sctp_transport *transport);
 int sctp_transport_hold(struct sctp_transport *);
 void sctp_transport_put(struct sctp_transport *);
 void sctp_transport_update_rto(struct sctp_transport *, __u32);
@@ -1010,6 +1024,8 @@ bool sctp_transport_update_pmtu(struct sctp_transport *t, u32 pmtu);
 void sctp_transport_immediate_rtx(struct sctp_transport *);
 void sctp_transport_dst_release(struct sctp_transport *t);
 void sctp_transport_dst_confirm(struct sctp_transport *t);
+void sctp_transport_pl_send(struct sctp_transport *t);
+bool sctp_transport_pl_recv(struct sctp_transport *t);
 
 
 /* This is the structure we use to queue packets as they come into
@@ -1125,13 +1141,14 @@ static inline void sctp_outq_cork(struct sctp_outq *q)
  */
 struct sctp_input_cb {
 	union {
-		struct inet_skb_parm	h4;
+		struct inet_skb_parm    h4;
 #if IS_ENABLED(CONFIG_IPV6)
-		struct inet6_skb_parm	h6;
+		struct inet6_skb_parm   h6;
 #endif
 	} header;
 	struct sctp_chunk *chunk;
 	struct sctp_af *af;
+	__be16 encap_port;
 };
 #define SCTP_INPUT_CB(__skb)	((struct sctp_input_cb *)&((__skb)->cb[0]))
 
@@ -1226,10 +1243,6 @@ enum sctp_endpoint_type {
  */
 
 struct sctp_ep_common {
-	/* Fields to help us manage our entries in the hash tables. */
-	struct hlist_node node;
-	int hashent;
-
 	/* Runtime type information.  What kind of endpoint is this? */
 	enum sctp_endpoint_type type;
 
@@ -1281,6 +1294,10 @@ struct sctp_endpoint {
 	/* Common substructure for endpoint and association. */
 	struct sctp_ep_common base;
 
+	/* Fields to help us manage our entries in the hash tables. */
+	struct hlist_node node;
+	int hashent;
+
 	/* Associations: A list of current associations and mappings
 	 *	      to the data consumers for each association. This
 	 *	      may be in the form of a hash table or other
@@ -1337,16 +1354,7 @@ struct sctp_endpoint {
 	      reconf_enable:1;
 
 	__u8  strreset_enable;
-
-	/* Security identifiers from incoming (INIT). These are set by
-	 * security_sctp_assoc_request(). These will only be used by
-	 * SCTP TCP type sockets and peeled off connections as they
-	 * cause a new socket to be generated. security_sctp_sk_clone()
-	 * will then plug these into the new socket.
-	 */
-
-	u32 secid;
-	u32 peer_secid;
+	struct rcu_head rcu;
 };
 
 /* Recover the outter endpoint structure. */
@@ -1362,7 +1370,7 @@ static inline struct sctp_endpoint *sctp_ep(struct sctp_ep_common *base)
 struct sctp_endpoint *sctp_endpoint_new(struct sock *, gfp_t);
 void sctp_endpoint_free(struct sctp_endpoint *);
 void sctp_endpoint_put(struct sctp_endpoint *);
-void sctp_endpoint_hold(struct sctp_endpoint *);
+int sctp_endpoint_hold(struct sctp_endpoint *ep);
 void sctp_endpoint_add_asoc(struct sctp_endpoint *, struct sctp_association *);
 struct sctp_association *sctp_endpoint_lookup_assoc(
 	const struct sctp_endpoint *ep,
@@ -1398,7 +1406,7 @@ struct sctp_stream_priorities {
 	struct list_head prio_sched;
 	/* List of streams scheduled */
 	struct list_head active;
-	/* The next stream stream in line */
+	/* The next stream in line */
 	struct sctp_stream_out_ext *next;
 	__u16 prio;
 };
@@ -1460,7 +1468,7 @@ struct sctp_stream {
 		struct {
 			/* List of streams scheduled */
 			struct list_head rr_list;
-			/* The next stream stream in line */
+			/* The next stream in line */
 			struct sctp_stream_out_ext *rr_next;
 		};
 	};
@@ -1770,7 +1778,7 @@ struct sctp_association {
 	int max_burst;
 
 	/* This is the max_retrans value for the association.  This value will
-	 * be initialized initialized from system defaults, but can be
+	 * be initialized from system defaults, but can be
 	 * modified by the SCTP_ASSOCINFO socket option.
 	 */
 	int max_retrans;
@@ -1797,6 +1805,9 @@ struct sctp_association {
 	 * will be inherited by all new transports.
 	 */
 	unsigned long hbinterval;
+	unsigned long probe_interval;
+
+	__be16 encap_port;
 
 	/* This is the max_retrans value for new transports in the
 	 * association.
@@ -2083,6 +2094,16 @@ struct sctp_association {
 	__u64 abandoned_unsent[SCTP_PR_INDEX(MAX) + 1];
 	__u64 abandoned_sent[SCTP_PR_INDEX(MAX) + 1];
 
+	/* Security identifiers from incoming (INIT). These are set by
+	 * security_sctp_assoc_request(). These will only be used by
+	 * SCTP TCP type sockets and peeled off connections as they
+	 * cause a new socket to be generated. security_sctp_sk_clone()
+	 * will then plug these into the new socket.
+	 */
+
+	u32 secid;
+	u32 peer_secid;
+
 	struct rcu_head rcu;
 };