patch-2.4.26 linux-2.4.26/include/net/sctp/sm.h

• Lines: 337
• Date: 2004-04-14 06:05:40.000000000 -0700
• Orig file: linux-2.4.25/include/net/sctp/sm.h
• Orig date: 2003-11-28 10:26:21.000000000 -0800

diff -urN linux-2.4.25/include/net/sctp/sm.h linux-2.4.26/include/net/sctp/sm.h
@@ -1,15 +1,11 @@
 /* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2003
  * Copyright (c) 1999-2000 Cisco, Inc.
  * Copyright (c) 1999-2001 Motorola, Inc.
  * Copyright (c) 2001 Intel Corp.
- * Copyright (c) 2001-2002 International Business Machines Corp.
  *
  * This file is part of the SCTP kernel reference Implementation
  *
- * This file is part of the implementation of the add-IP extension,
- * based on <draft-ietf-tsvwg-addip-sctp-02.txt> June 29, 2001,
- * for the SCTP kernel reference Implementation.
- *
  * These are definitions needed by the state machine.
  *
  * The SCTP reference implementation is free software;
@@ -45,12 +41,12 @@
  *    Sridhar Samudrala <sri@us.ibm.com>
  *    Daisy Chang <daisyc@us.ibm.com>
  *    Ardelle Fan <ardelle.fan@intel.com>
+ *    Kevin Gao <kevin.gao@intel.com>
  *
  * Any bugs reported given to us we will try to fix... any fixes shared will
  * be incorporated into the next SCTP release.
  */
 
-
 #include <linux/types.h>
 #include <linux/compiler.h>
 #include <linux/slab.h>
@@ -89,7 +85,7 @@
 typedef void (sctp_timer_event_t) (unsigned long);
 typedef struct {
 	sctp_state_fn_t *fn;
-	char *name;
+	const char *name;
 } sctp_sm_table_entry_t;
 
 /* A naming convention of "sctp_sf_xxx" applies to all the state functions
@@ -122,6 +118,7 @@
 sctp_state_fn_t sctp_sf_operr_notify;
 sctp_state_fn_t sctp_sf_t1_timer_expire;
 sctp_state_fn_t sctp_sf_t2_timer_expire;
+sctp_state_fn_t sctp_sf_t4_timer_expire;
 sctp_state_fn_t sctp_sf_t5_timer_expire;
 sctp_state_fn_t sctp_sf_sendbeat_8_3;
 sctp_state_fn_t sctp_sf_beat_8_3;
@@ -142,6 +139,8 @@
 sctp_state_fn_t sctp_sf_do_8_5_1_E_sa;
 sctp_state_fn_t sctp_sf_cookie_echoed_err;
 sctp_state_fn_t sctp_sf_do_5_2_6_stale;
+sctp_state_fn_t sctp_sf_do_asconf;
+sctp_state_fn_t sctp_sf_do_asconf_ack;
 
 /* Prototypes for primitive event state functions.  */
 sctp_state_fn_t sctp_sf_do_prm_asoc;
@@ -159,6 +158,7 @@
 sctp_state_fn_t sctp_sf_error_shutdown;
 sctp_state_fn_t sctp_sf_ignore_primitive;
 sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
+sctp_state_fn_t sctp_sf_do_prm_asconf;
 
 /* Prototypes for other event state functions.  */
 sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
@@ -181,9 +181,6 @@
 sctp_state_fn_t sctp_sf_do_9_2_reshut;
 sctp_state_fn_t sctp_sf_do_9_2_shutack;
 
-sctp_state_fn_t lucky;
-sctp_state_fn_t other_stupid;
-
 /* Prototypes for timeout event state functions.  Not in use. */
 sctp_state_fn_t sctp_do_4_2_reinit;
 sctp_state_fn_t sctp_do_4_3_reecho;
@@ -192,15 +189,11 @@
 sctp_state_fn_t sctp_do_8_3_hb_err;
 sctp_state_fn_t sctp_heartoff;
 
-/* Prototypes for addip related state functions.  Not in use. */
-sctp_state_fn_t sctp_addip_do_asconf;
-sctp_state_fn_t sctp_addip_do_asconf_ack;
-
 /* Prototypes for utility support functions.  */
 __u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
-sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t event_type,
-					    sctp_state_t state,
-					    sctp_subtype_t event_subtype);
+const sctp_sm_table_entry_t *sctp_sm_lookup_event(sctp_event_t,
+					    sctp_state_t,
+					    sctp_subtype_t);
 int sctp_chunk_iif(const struct sctp_chunk *);
 struct sctp_association *sctp_make_temp_asoc(const struct sctp_endpoint *,
 					     struct sctp_chunk *,
@@ -209,71 +202,84 @@
 void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
 
 /* Prototypes for chunk-building functions.  */
-sctp_chunk_t *sctp_make_init(const struct sctp_association *,
-			     const sctp_bind_addr_t *,
+struct sctp_chunk *sctp_make_init(const struct sctp_association *,
+			     const struct sctp_bind_addr *,
 			     int gfp, int vparam_len);
-sctp_chunk_t *sctp_make_init_ack(const struct sctp_association *,
-				 const sctp_chunk_t *,
+struct sctp_chunk *sctp_make_init_ack(const struct sctp_association *,
+				 const struct sctp_chunk *,
 				 const int gfp,
 				 const int unkparam_len);
-sctp_chunk_t *sctp_make_cookie_echo(const struct sctp_association *,
-				    const sctp_chunk_t *);
-sctp_chunk_t *sctp_make_cookie_ack(const struct sctp_association *,
-				   const sctp_chunk_t *);
-sctp_chunk_t *sctp_make_cwr(const struct sctp_association *,
+struct sctp_chunk *sctp_make_cookie_echo(const struct sctp_association *,
+				    const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_cookie_ack(const struct sctp_association *,
+				   const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_cwr(const struct sctp_association *,
 				 const __u32 lowest_tsn,
-				 const sctp_chunk_t *);
-sctp_chunk_t *sctp_make_datafrag(struct sctp_association *,
+				 const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_datafrag(struct sctp_association *,
 				 const struct sctp_sndrcvinfo *sinfo,
 				 int len, const __u8 *data,
 				 __u8 flags, __u16 ssn);
-sctp_chunk_t * sctp_make_datafrag_empty(struct sctp_association *,
+struct sctp_chunk * sctp_make_datafrag_empty(struct sctp_association *,
 					const struct sctp_sndrcvinfo *sinfo,
 					int len, const __u8 flags,
 					__u16 ssn);
-sctp_chunk_t *sctp_make_data(struct sctp_association *,
+struct sctp_chunk *sctp_make_data(struct sctp_association *,
 			     const struct sctp_sndrcvinfo *sinfo,
 			     int len, const __u8 *data);
-sctp_chunk_t *sctp_make_data_empty(struct sctp_association *,
+struct sctp_chunk *sctp_make_data_empty(struct sctp_association *,
 				   const struct sctp_sndrcvinfo *, int len);
-sctp_chunk_t *sctp_make_ecne(const struct sctp_association *,
+struct sctp_chunk *sctp_make_ecne(const struct sctp_association *,
 				  const __u32);
-sctp_chunk_t *sctp_make_sack(const struct sctp_association *);
-sctp_chunk_t *sctp_make_shutdown(const struct sctp_association *asoc);
-sctp_chunk_t *sctp_make_shutdown_ack(const struct sctp_association *asoc,
-					  const sctp_chunk_t *);
-sctp_chunk_t *sctp_make_shutdown_complete(const struct sctp_association *,
-					  const sctp_chunk_t *);
-void sctp_init_cause(sctp_chunk_t *, __u16 cause, const void *, size_t);
-sctp_chunk_t *sctp_make_abort(const struct sctp_association *,
-			      const sctp_chunk_t *,
+struct sctp_chunk *sctp_make_sack(const struct sctp_association *);
+struct sctp_chunk *sctp_make_shutdown(const struct sctp_association *asoc,
+				      const struct sctp_chunk *chunk);
+struct sctp_chunk *sctp_make_shutdown_ack(const struct sctp_association *asoc,
+					  const struct sctp_chunk *);
+struct sctp_chunk *sctp_make_shutdown_complete(const struct sctp_association *,
+					  const struct sctp_chunk *);
+void sctp_init_cause(struct sctp_chunk *, __u16 cause, const void *, size_t);
+struct sctp_chunk *sctp_make_abort(const struct sctp_association *,
+			      const struct sctp_chunk *,
 			      const size_t hint);
-sctp_chunk_t *sctp_make_abort_no_data(const struct sctp_association *,
-				      const sctp_chunk_t *,
+struct sctp_chunk *sctp_make_abort_no_data(const struct sctp_association *,
+				      const struct sctp_chunk *,
 				      __u32 tsn);
-sctp_chunk_t *sctp_make_abort_user(const struct sctp_association *,
-				   const sctp_chunk_t *,
+struct sctp_chunk *sctp_make_abort_user(const struct sctp_association *,
+				   const struct sctp_chunk *,
 				   const struct msghdr *);
-sctp_chunk_t *sctp_make_heartbeat(const struct sctp_association *,
+struct sctp_chunk *sctp_make_heartbeat(const struct sctp_association *,
 				  const struct sctp_transport *,
 				  const void *payload,
 				  const size_t paylen);
-sctp_chunk_t *sctp_make_heartbeat_ack(const struct sctp_association *,
-				      const sctp_chunk_t *,
+struct sctp_chunk *sctp_make_heartbeat_ack(const struct sctp_association *,
+				      const struct sctp_chunk *,
 				      const void *payload,
 				      const size_t paylen);
-sctp_chunk_t *sctp_make_op_error(const struct sctp_association *,
-				 const sctp_chunk_t *chunk,
+struct sctp_chunk *sctp_make_op_error(const struct sctp_association *,
+				 const struct sctp_chunk *chunk,
 				 __u16 cause_code,
 				 const void *payload,
 				 size_t paylen);
-void sctp_chunk_assign_tsn(sctp_chunk_t *);
-void sctp_chunk_assign_ssn(sctp_chunk_t *);
-int sctp_datachunks_from_user(struct sctp_association *,
-			      const struct sctp_sndrcvinfo *,
-			      struct msghdr *, int len,
-			      struct sk_buff_head *);
 
+struct sctp_chunk *sctp_make_asconf(struct sctp_association *asoc,
+				    union sctp_addr *addr,
+				    int vparam_len);
+struct sctp_chunk *sctp_make_asconf_update_ip(struct sctp_association *,
+					      union sctp_addr *,
+					      struct sockaddr *,
+					      int, __u16);
+struct sctp_chunk *sctp_make_asconf_set_prim(struct sctp_association *asoc,
+					     union sctp_addr *addr);
+struct sctp_chunk *sctp_make_asconf_ack(const struct sctp_association *asoc,
+					__u32 serial, int vparam_len);
+struct sctp_chunk *sctp_process_asconf(struct sctp_association *asoc,
+				       struct sctp_chunk *asconf);
+int sctp_process_asconf_ack(struct sctp_association *asoc,
+			    struct sctp_chunk *asconf_ack);
+
+void sctp_chunk_assign_tsn(struct sctp_chunk *);
+void sctp_chunk_assign_ssn(struct sctp_chunk *);
 
 /* Prototypes for statetable processing. */
 
@@ -294,24 +300,17 @@
                       int gfp);
 
 /* 2nd level prototypes */
-int
-sctp_cmd_interpreter(sctp_event_t event_type, sctp_subtype_t subtype,
-		     sctp_state_t state,
-		     struct sctp_endpoint *ep,
-		     struct sctp_association *asoc,
-		     void *event_arg,
-		     sctp_disposition_t status,
-		     sctp_cmd_seq_t *retval,
-		     int gfp);
+int sctp_cmd_interpreter(sctp_event_t, sctp_subtype_t, sctp_state_t,
+			 struct sctp_endpoint *, struct sctp_association *,
+			 void *event_arg, sctp_disposition_t,
+			 sctp_cmd_seq_t *retval, int gfp);
 
 
 int sctp_gen_sack(struct sctp_association *, int force, sctp_cmd_seq_t *);
-void sctp_do_TSNdup(struct sctp_association *, sctp_chunk_t *, long gap);
-
 void sctp_generate_t3_rtx_event(unsigned long peer);
 void sctp_generate_heartbeat_event(unsigned long peer);
 
-sctp_sackhdr_t *sctp_sm_pull_sack(sctp_chunk_t *);
+sctp_sackhdr_t *sctp_sm_pull_sack(struct sctp_chunk *);
 struct sctp_packet *sctp_abort_pkt_new(const struct sctp_endpoint *,
 				       const struct sctp_association *,
 				       struct sctp_chunk *chunk,
@@ -321,39 +320,33 @@
 				      const struct sctp_chunk *);
 void sctp_ootb_pkt_free(struct sctp_packet *);
 
-sctp_cookie_param_t *
+struct sctp_cookie_param *
 sctp_pack_cookie(const struct sctp_endpoint *, const struct sctp_association *,
 		 const struct sctp_chunk *, int *cookie_len,
 		 const __u8 *, int addrs_len);
 struct sctp_association *sctp_unpack_cookie(const struct sctp_endpoint *,
 				       const struct sctp_association *,
-				       sctp_chunk_t *, int gfp, int *err,
-				       sctp_chunk_t **err_chk_p);
+				       struct sctp_chunk *, int gfp, int *err,
+				       struct sctp_chunk **err_chk_p);
 int sctp_addip_addr_config(struct sctp_association *, sctp_param_t,
 			   struct sockaddr_storage*, int);
 void sctp_send_stale_cookie_err(const struct sctp_endpoint *ep,
 				const struct sctp_association *asoc,
-				const sctp_chunk_t *chunk,
+				const struct sctp_chunk *chunk,
 				sctp_cmd_seq_t *commands,
-				sctp_chunk_t *err_chunk);
+				struct sctp_chunk *err_chunk);
 
 /* 3rd level prototypes */
 __u32 sctp_generate_tag(const struct sctp_endpoint *);
 __u32 sctp_generate_tsn(const struct sctp_endpoint *);
 
-/* 4th level prototypes */
-void sctp_param2sockaddr(union sctp_addr *addr, sctp_addr_param_t *,
-			 __u16 port, int iif);
-int sctp_addr2sockaddr(const union sctp_params, union sctp_addr *);
-int sockaddr2sctp_addr(const union sctp_addr *, sctp_addr_param_t *);
-
 /* Extern declarations for major data structures.  */
-sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t, sctp_state_t);
-extern sctp_sm_table_entry_t
+const sctp_sm_table_entry_t *sctp_chunk_event_lookup(sctp_cid_t, sctp_state_t);
+extern const sctp_sm_table_entry_t
 primitive_event_table[SCTP_NUM_PRIMITIVE_TYPES][SCTP_STATE_NUM_STATES];
-extern sctp_sm_table_entry_t
+extern const sctp_sm_table_entry_t
 other_event_table[SCTP_NUM_OTHER_TYPES][SCTP_STATE_NUM_STATES];
-extern sctp_sm_table_entry_t
+extern const sctp_sm_table_entry_t
 timeout_event_table[SCTP_NUM_TIMEOUT_TYPES][SCTP_STATE_NUM_STATES];
 extern sctp_timer_event_t *sctp_timer_events[SCTP_NUM_TIMEOUT_TYPES];
 
@@ -361,7 +354,7 @@
 
 
 /* Get the size of a DATA chunk payload. */
-static inline __u16 sctp_data_size(sctp_chunk_t *chunk)
+static inline __u16 sctp_data_size(struct sctp_chunk *chunk)
 {
 	__u16 size;
 
@@ -438,6 +431,21 @@
 	return (((s) == (t)) || (((s) - (t)) & SSN_SIGN_BIT));
 }
 
+/*
+ * ADDIP 3.1.1
+ * The valid range of Serial Number is from 0 to 4294967295 (2**32 - 1). Serial
+ * Numbers wrap back to 0 after reaching 4294967295.
+ */
+enum {
+	ADDIP_SERIAL_SIGN_BIT = (1<<31)
+};
+
+static inline int ADDIP_SERIAL_gte(__u16 s, __u16 t)
+{
+	return (((s) == (t)) || (((t) - (s)) & ADDIP_SERIAL_SIGN_BIT));
+}
+
+
 /* Run sctp_add_cmd() generating a BUG() if there is a failure.  */
 static inline void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
 {
@@ -449,7 +457,7 @@
  * tag and the T bit is set in the Chunk Flags.
  */
 static inline int
-sctp_vtag_verify_either(const sctp_chunk_t *chunk,
+sctp_vtag_verify_either(const struct sctp_chunk *chunk,
 			const struct sctp_association *asoc)
 {
         /* RFC 2960 Section 8.5.1, sctpimpguide-06 Section 2.13.2