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diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
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+/* SCTP kernel reference Implementation
+ * (C) Copyright IBM Corp. 2001, 2004
+ * Copyright (c) 1999-2000 Cisco, Inc.
+ * Copyright (c) 1999-2001 Motorola, Inc.
+ * Copyright (c) 2001-2003 Intel Corp.
+ *
+ * This file is part of the SCTP kernel reference Implementation
+ *
+ * The base lksctp header.
+ *
+ * The SCTP reference implementation is free software;
+ * you can redistribute it and/or modify it under the terms of
+ * the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * The SCTP reference implementation is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * ************************
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU CC; see the file COPYING. If not, write to
+ * the Free Software Foundation, 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Please send any bug reports or fixes you make to the
+ * email address(es):
+ * lksctp developers <lksctp-developers@lists.sourceforge.net>
+ *
+ * Or submit a bug report through the following website:
+ * http://www.sf.net/projects/lksctp
+ *
+ * Written or modified by:
+ * La Monte H.P. Yarroll <piggy@acm.org>
+ * Xingang Guo <xingang.guo@intel.com>
+ * Jon Grimm <jgrimm@us.ibm.com>
+ * Daisy Chang <daisyc@us.ibm.com>
+ * Sridhar Samudrala <sri@us.ibm.com>
+ * Ardelle Fan <ardelle.fan@intel.com>
+ * Ryan Layer <rmlayer@us.ibm.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.
+ */
+
+#ifndef __net_sctp_h__
+#define __net_sctp_h__
+
+/* Header Strategy.
+ * Start getting some control over the header file depencies:
+ * includes
+ * constants
+ * structs
+ * prototypes
+ * macros, externs, and inlines
+ *
+ * Move test_frame specific items out of the kernel headers
+ * and into the test frame headers. This is not perfect in any sense
+ * and will continue to evolve.
+ */
+
+
+#include <linux/config.h>
+
+#ifdef TEST_FRAME
+#undef CONFIG_PROC_FS
+#undef CONFIG_SCTP_DBG_OBJCNT
+#undef CONFIG_SYSCTL
+#endif /* TEST_FRAME */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/tty.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/jiffies.h>
+#include <linux/idr.h>
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/ipv6.h>
+#include <net/ip6_route.h>
+#endif
+
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <net/sock.h>
+#include <net/snmp.h>
+#include <net/sctp/structs.h>
+#include <net/sctp/constants.h>
+
+
+/* Set SCTP_DEBUG flag via config if not already set. */
+#ifndef SCTP_DEBUG
+#ifdef CONFIG_SCTP_DBG_MSG
+#define SCTP_DEBUG 1
+#else
+#define SCTP_DEBUG 0
+#endif /* CONFIG_SCTP_DBG */
+#endif /* SCTP_DEBUG */
+
+#ifdef CONFIG_IP_SCTP_MODULE
+#define SCTP_PROTOSW_FLAG 0
+#else /* static! */
+#define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
+#endif
+
+
+/* Certain internal static functions need to be exported when
+ * compiled into the test frame.
+ */
+#ifndef SCTP_STATIC
+#define SCTP_STATIC static
+#endif
+
+/*
+ * Function declarations.
+ */
+
+/*
+ * sctp/protocol.c
+ */
+extern struct sock *sctp_get_ctl_sock(void);
+extern int sctp_copy_local_addr_list(struct sctp_bind_addr *,
+ sctp_scope_t, int gfp, int flags);
+extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
+extern int sctp_register_pf(struct sctp_pf *, sa_family_t);
+
+/*
+ * sctp/socket.c
+ */
+int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
+int sctp_inet_listen(struct socket *sock, int backlog);
+void sctp_write_space(struct sock *sk);
+unsigned int sctp_poll(struct file *file, struct socket *sock,
+ poll_table *wait);
+
+/*
+ * sctp/primitive.c
+ */
+int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg);
+int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg);
+int sctp_primitive_ABORT(struct sctp_association *, void *arg);
+int sctp_primitive_SEND(struct sctp_association *, void *arg);
+int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg);
+int sctp_primitive_ASCONF(struct sctp_association *, void *arg);
+
+/*
+ * sctp/crc32c.c
+ */
+__u32 sctp_start_cksum(__u8 *ptr, __u16 count);
+__u32 sctp_update_cksum(__u8 *ptr, __u16 count, __u32 cksum);
+__u32 sctp_end_cksum(__u32 cksum);
+__u32 sctp_update_copy_cksum(__u8 *, __u8 *, __u16 count, __u32 cksum);
+
+/*
+ * sctp/input.c
+ */
+int sctp_rcv(struct sk_buff *skb);
+void sctp_v4_err(struct sk_buff *skb, u32 info);
+void sctp_hash_established(struct sctp_association *);
+void sctp_unhash_established(struct sctp_association *);
+void sctp_hash_endpoint(struct sctp_endpoint *);
+void sctp_unhash_endpoint(struct sctp_endpoint *);
+struct sock *sctp_err_lookup(int family, struct sk_buff *,
+ struct sctphdr *, struct sctp_endpoint **,
+ struct sctp_association **,
+ struct sctp_transport **);
+void sctp_err_finish(struct sock *, struct sctp_endpoint *,
+ struct sctp_association *);
+void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
+ struct sctp_transport *t, __u32 pmtu);
+void sctp_icmp_proto_unreachable(struct sock *sk,
+ struct sctp_endpoint *ep,
+ struct sctp_association *asoc,
+ struct sctp_transport *t);
+
+/*
+ * Section: Macros, externs, and inlines
+ */
+
+
+#ifdef TEST_FRAME
+#include <test_frame.h>
+#else
+
+/* spin lock wrappers. */
+#define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags)
+#define sctp_spin_unlock_irqrestore(lock, flags) \
+ spin_unlock_irqrestore(lock, flags)
+#define sctp_local_bh_disable() local_bh_disable()
+#define sctp_local_bh_enable() local_bh_enable()
+#define sctp_spin_lock(lock) spin_lock(lock)
+#define sctp_spin_unlock(lock) spin_unlock(lock)
+#define sctp_write_lock(lock) write_lock(lock)
+#define sctp_write_unlock(lock) write_unlock(lock)
+#define sctp_read_lock(lock) read_lock(lock)
+#define sctp_read_unlock(lock) read_unlock(lock)
+
+/* sock lock wrappers. */
+#define sctp_lock_sock(sk) lock_sock(sk)
+#define sctp_release_sock(sk) release_sock(sk)
+#define sctp_bh_lock_sock(sk) bh_lock_sock(sk)
+#define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk)
+#define SCTP_SOCK_SLEEP_PRE(sk) SOCK_SLEEP_PRE(sk)
+#define SCTP_SOCK_SLEEP_POST(sk) SOCK_SLEEP_POST(sk)
+
+/* SCTP SNMP MIB stats handlers */
+DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics);
+#define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field)
+#define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field)
+#define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field)
+#define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field)
+
+#endif /* !TEST_FRAME */
+
+
+/* Print debugging messages. */
+#if SCTP_DEBUG
+extern int sctp_debug_flag;
+#define SCTP_DEBUG_PRINTK(whatever...) \
+ ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever)))
+#define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; }
+#define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; }
+
+#define SCTP_ASSERT(expr, str, func) \
+ if (!(expr)) { \
+ SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \
+ str, (#expr), __FILE__, __FUNCTION__, __LINE__); \
+ func; \
+ }
+
+#else /* SCTP_DEBUG */
+
+#define SCTP_DEBUG_PRINTK(whatever...)
+#define SCTP_ENABLE_DEBUG
+#define SCTP_DISABLE_DEBUG
+#define SCTP_ASSERT(expr, str, func)
+
+#endif /* SCTP_DEBUG */
+
+
+/*
+ * Macros for keeping a global reference of object allocations.
+ */
+#ifdef CONFIG_SCTP_DBG_OBJCNT
+
+extern atomic_t sctp_dbg_objcnt_sock;
+extern atomic_t sctp_dbg_objcnt_ep;
+extern atomic_t sctp_dbg_objcnt_assoc;
+extern atomic_t sctp_dbg_objcnt_transport;
+extern atomic_t sctp_dbg_objcnt_chunk;
+extern atomic_t sctp_dbg_objcnt_bind_addr;
+extern atomic_t sctp_dbg_objcnt_bind_bucket;
+extern atomic_t sctp_dbg_objcnt_addr;
+extern atomic_t sctp_dbg_objcnt_ssnmap;
+extern atomic_t sctp_dbg_objcnt_datamsg;
+
+/* Macros to atomically increment/decrement objcnt counters. */
+#define SCTP_DBG_OBJCNT_INC(name) \
+atomic_inc(&sctp_dbg_objcnt_## name)
+#define SCTP_DBG_OBJCNT_DEC(name) \
+atomic_dec(&sctp_dbg_objcnt_## name)
+#define SCTP_DBG_OBJCNT(name) \
+atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
+
+/* Macro to help create new entries in in the global array of
+ * objcnt counters.
+ */
+#define SCTP_DBG_OBJCNT_ENTRY(name) \
+{.label= #name, .counter= &sctp_dbg_objcnt_## name}
+
+void sctp_dbg_objcnt_init(void);
+void sctp_dbg_objcnt_exit(void);
+
+#else
+
+#define SCTP_DBG_OBJCNT_INC(name)
+#define SCTP_DBG_OBJCNT_DEC(name)
+
+static inline void sctp_dbg_objcnt_init(void) { return; }
+static inline void sctp_dbg_objcnt_exit(void) { return; }
+
+#endif /* CONFIG_SCTP_DBG_OBJCOUNT */
+
+#if defined CONFIG_SYSCTL
+void sctp_sysctl_register(void);
+void sctp_sysctl_unregister(void);
+#else
+static inline void sctp_sysctl_register(void) { return; }
+static inline void sctp_sysctl_unregister(void) { return; }
+static inline int sctp_sysctl_jiffies_ms(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context) {
+ return -ENOSYS;
+}
+#endif
+
+/* Size of Supported Address Parameter for 'x' address types. */
+#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+int sctp_v6_init(void);
+void sctp_v6_exit(void);
+
+#else /* #ifdef defined(CONFIG_IPV6) */
+
+static inline int sctp_v6_init(void) { return 0; }
+static inline void sctp_v6_exit(void) { return; }
+
+#endif /* #if defined(CONFIG_IPV6) */
+
+/* Some wrappers, in case crypto not available. */
+#if defined (CONFIG_CRYPTO_HMAC)
+#define sctp_crypto_alloc_tfm crypto_alloc_tfm
+#define sctp_crypto_free_tfm crypto_free_tfm
+#define sctp_crypto_hmac crypto_hmac
+#else
+#define sctp_crypto_alloc_tfm(x...) NULL
+#define sctp_crypto_free_tfm(x...)
+#define sctp_crypto_hmac(x...)
+#endif
+
+
+/* Map an association to an assoc_id. */
+static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
+{
+ return (asoc?asoc->assoc_id:0);
+}
+
+/* Look up the association by its id. */
+struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
+
+
+/* A macro to walk a list of skbs. */
+#define sctp_skb_for_each(pos, head, tmp) \
+for (pos = (head)->next;\
+ tmp = (pos)->next, pos != ((struct sk_buff *)(head));\
+ pos = tmp)
+
+
+/* A helper to append an entire skb list (list) to another (head). */
+static inline void sctp_skb_list_tail(struct sk_buff_head *list,
+ struct sk_buff_head *head)
+{
+ unsigned long flags;
+
+ sctp_spin_lock_irqsave(&head->lock, flags);
+ sctp_spin_lock(&list->lock);
+
+ list_splice((struct list_head *)list, (struct list_head *)head->prev);
+
+ head->qlen += list->qlen;
+ list->qlen = 0;
+
+ sctp_spin_unlock(&list->lock);
+ sctp_spin_unlock_irqrestore(&head->lock, flags);
+}
+
+/**
+ * sctp_list_dequeue - remove from the head of the queue
+ * @list: list to dequeue from
+ *
+ * Remove the head of the list. The head item is
+ * returned or %NULL if the list is empty.
+ */
+
+static inline struct list_head *sctp_list_dequeue(struct list_head *list)
+{
+ struct list_head *result = NULL;
+
+ if (list->next != list) {
+ result = list->next;
+ list->next = result->next;
+ list->next->prev = list;
+ INIT_LIST_HEAD(result);
+ }
+ return result;
+}
+
+/* Tests if the list has one and only one entry. */
+static inline int sctp_list_single_entry(struct list_head *head)
+{
+ return ((head->next != head) && (head->next == head->prev));
+}
+
+/* Calculate the size (in bytes) occupied by the data of an iovec. */
+static inline size_t get_user_iov_size(struct iovec *iov, int iovlen)
+{
+ size_t retval = 0;
+
+ for (; iovlen > 0; --iovlen) {
+ retval += iov->iov_len;
+ iov++;
+ }
+
+ return retval;
+}
+
+/* Generate a random jitter in the range of -50% ~ +50% of input RTO. */
+static inline __s32 sctp_jitter(__u32 rto)
+{
+ static __u32 sctp_rand;
+ __s32 ret;
+
+ /* Avoid divide by zero. */
+ if (!rto)
+ rto = 1;
+
+ sctp_rand += jiffies;
+ sctp_rand ^= (sctp_rand << 12);
+ sctp_rand ^= (sctp_rand >> 20);
+
+ /* Choose random number from 0 to rto, then move to -50% ~ +50%
+ * of rto.
+ */
+ ret = sctp_rand % rto - (rto >> 1);
+ return ret;
+}
+
+/* Break down data chunks at this point. */
+static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu)
+{
+ int frag = pmtu;
+
+ frag -= sp->pf->af->net_header_len;
+ frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk);
+
+ if (sp->user_frag)
+ frag = min_t(int, frag, sp->user_frag);
+
+ frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN);
+
+ return frag;
+}
+
+/* Walk through a list of TLV parameters. Don't trust the
+ * individual parameter lengths and instead depend on
+ * the chunk length to indicate when to stop. Make sure
+ * there is room for a param header too.
+ */
+#define sctp_walk_params(pos, chunk, member)\
+_sctp_walk_params((pos), (chunk), WORD_ROUND(ntohs((chunk)->chunk_hdr.length)), member)
+
+#define _sctp_walk_params(pos, chunk, end, member)\
+for (pos.v = chunk->member;\
+ pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\
+ pos.v <= (void *)chunk + end - WORD_ROUND(ntohs(pos.p->length)) &&\
+ ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\
+ pos.v += WORD_ROUND(ntohs(pos.p->length)))
+
+#define sctp_walk_errors(err, chunk_hdr)\
+_sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
+
+#define _sctp_walk_errors(err, chunk_hdr, end)\
+for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \
+ sizeof(sctp_chunkhdr_t));\
+ (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\
+ (void *)err <= (void *)chunk_hdr + end - WORD_ROUND(ntohs(err->length)) &&\
+ ntohs(err->length) >= sizeof(sctp_errhdr_t); \
+ err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length))))
+
+#define sctp_walk_fwdtsn(pos, chunk)\
+_sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
+
+#define _sctp_walk_fwdtsn(pos, chunk, end)\
+for (pos = chunk->subh.fwdtsn_hdr->skip;\
+ (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
+ pos++)
+
+/* Round an int up to the next multiple of 4. */
+#define WORD_ROUND(s) (((s)+3)&~3)
+
+/* Make a new instance of type. */
+#define t_new(type, flags) (type *)kmalloc(sizeof(type), flags)
+
+/* Compare two timevals. */
+#define tv_lt(s, t) \
+ (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec))
+
+/* Add tv1 to tv2. */
+#define TIMEVAL_ADD(tv1, tv2) \
+({ \
+ suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \
+ time_t secs = (tv2).tv_sec + (tv1).tv_sec; \
+\
+ if (usecs >= 1000000) { \
+ usecs -= 1000000; \
+ secs++; \
+ } \
+ (tv2).tv_sec = secs; \
+ (tv2).tv_usec = usecs; \
+})
+
+/* External references. */
+
+extern struct proto sctp_prot;
+extern struct proto sctpv6_prot;
+extern struct proc_dir_entry *proc_net_sctp;
+void sctp_put_port(struct sock *sk);
+
+extern struct idr sctp_assocs_id;
+extern spinlock_t sctp_assocs_id_lock;
+
+/* Static inline functions. */
+
+/* Convert from an IP version number to an Address Family symbol. */
+static inline int ipver2af(__u8 ipver)
+{
+ switch (ipver) {
+ case 4:
+ return AF_INET;
+ case 6:
+ return AF_INET6;
+ default:
+ return 0;
+ };
+}
+
+/* Convert from an address parameter type to an address family. */
+static inline int param_type2af(__u16 type)
+{
+ switch (type) {
+ case SCTP_PARAM_IPV4_ADDRESS:
+ return AF_INET;
+ case SCTP_PARAM_IPV6_ADDRESS:
+ return AF_INET6;
+ default:
+ return 0;
+ };
+}
+
+/* Perform some sanity checks. */
+static inline int sctp_sanity_check(void)
+{
+ SCTP_ASSERT(sizeof(struct sctp_ulpevent) <=
+ sizeof(((struct sk_buff *)0)->cb),
+ "SCTP: ulpevent does not fit in skb!\n", return 0);
+
+ return 1;
+}
+
+/* Warning: The following hash functions assume a power of two 'size'. */
+/* This is the hash function for the SCTP port hash table. */
+static inline int sctp_phashfn(__u16 lport)
+{
+ return (lport & (sctp_port_hashsize - 1));
+}
+
+/* This is the hash function for the endpoint hash table. */
+static inline int sctp_ep_hashfn(__u16 lport)
+{
+ return (lport & (sctp_ep_hashsize - 1));
+}
+
+/* This is the hash function for the association hash table. */
+static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport)
+{
+ int h = (lport << 16) + rport;
+ h ^= h>>8;
+ return (h & (sctp_assoc_hashsize - 1));
+}
+
+/* This is the hash function for the association hash table. This is
+ * not used yet, but could be used as a better hash function when
+ * we have a vtag.
+ */
+static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag)
+{
+ int h = (lport << 16) + rport;
+ h ^= vtag;
+ return (h & (sctp_assoc_hashsize-1));
+}
+
+/* Is a socket of this style? */
+#define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
+static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style)
+{
+ return sctp_sk(sk)->type == style;
+}
+
+/* Is the association in this state? */
+#define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
+static inline int __sctp_state(const struct sctp_association *asoc,
+ sctp_state_t state)
+{
+ return asoc->state == state;
+}
+
+/* Is the socket in this state? */
+#define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
+static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state)
+{
+ return sk->sk_state == state;
+}
+
+/* Map v4-mapped v6 address back to v4 address */
+static inline void sctp_v6_map_v4(union sctp_addr *addr)
+{
+ addr->v4.sin_family = AF_INET;
+ addr->v4.sin_port = addr->v6.sin6_port;
+ addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
+}
+
+/* Map v4 address to v4-mapped v6 address */
+static inline void sctp_v4_map_v6(union sctp_addr *addr)
+{
+ addr->v6.sin6_family = AF_INET6;
+ addr->v6.sin6_port = addr->v4.sin_port;
+ addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
+ addr->v6.sin6_addr.s6_addr32[0] = 0;
+ addr->v6.sin6_addr.s6_addr32[1] = 0;
+ addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
+}
+
+#endif /* __net_sctp_h__ */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-04 18:02:45 +0000