diff options
Diffstat (limited to 'ANDROID_3.4.5/include/net/sctp/sctp.h')
-rw-r--r-- | ANDROID_3.4.5/include/net/sctp/sctp.h | 720 |
1 files changed, 0 insertions, 720 deletions
diff --git a/ANDROID_3.4.5/include/net/sctp/sctp.h b/ANDROID_3.4.5/include/net/sctp/sctp.h deleted file mode 100644 index a2ef8146..00000000 --- a/ANDROID_3.4.5/include/net/sctp/sctp.h +++ /dev/null @@ -1,720 +0,0 @@ -/* SCTP kernel 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 implementation - * - * The base lksctp header. - * - * This SCTP 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. - * - * This SCTP 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/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 IS_ENABLED(CONFIG_IPV6) -#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, gfp_t 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); -extern void sctp_addr_wq_mgmt(struct sctp_sockaddr_entry *, int); - -/* - * 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); -void sctp_data_ready(struct sock *sk, int len); -unsigned int sctp_poll(struct file *file, struct socket *sock, - poll_table *wait); -void sctp_sock_rfree(struct sk_buff *skb); -void sctp_copy_sock(struct sock *newsk, struct sock *sk, - struct sctp_association *asoc); -extern struct percpu_counter sctp_sockets_allocated; -extern int sctp_asconf_mgmt(struct sctp_sock *, struct sctp_sockaddr_entry *); - -/* - * 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/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_association **, - struct sctp_transport **); -void sctp_err_finish(struct sock *, 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_association *asoc, - struct sctp_transport *t); -void sctp_backlog_migrate(struct sctp_association *assoc, - struct sock *oldsk, struct sock *newsk); - -/* - * sctp/proc.c - */ -int sctp_snmp_proc_init(void); -void sctp_snmp_proc_exit(void); -int sctp_eps_proc_init(void); -void sctp_eps_proc_exit(void); -int sctp_assocs_proc_init(void); -void sctp_assocs_proc_exit(void); -int sctp_remaddr_proc_init(void); -void sctp_remaddr_proc_exit(void); - - -/* - * Module global variables - */ - - /* - * sctp/protocol.c - */ -extern struct kmem_cache *sctp_chunk_cachep __read_mostly; -extern struct kmem_cache *sctp_bucket_cachep __read_mostly; - -/* - * 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) - -/* 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 */ - -/* sctp mib definitions */ -enum { - SCTP_MIB_NUM = 0, - SCTP_MIB_CURRESTAB, /* CurrEstab */ - SCTP_MIB_ACTIVEESTABS, /* ActiveEstabs */ - SCTP_MIB_PASSIVEESTABS, /* PassiveEstabs */ - SCTP_MIB_ABORTEDS, /* Aborteds */ - SCTP_MIB_SHUTDOWNS, /* Shutdowns */ - SCTP_MIB_OUTOFBLUES, /* OutOfBlues */ - SCTP_MIB_CHECKSUMERRORS, /* ChecksumErrors */ - SCTP_MIB_OUTCTRLCHUNKS, /* OutCtrlChunks */ - SCTP_MIB_OUTORDERCHUNKS, /* OutOrderChunks */ - SCTP_MIB_OUTUNORDERCHUNKS, /* OutUnorderChunks */ - SCTP_MIB_INCTRLCHUNKS, /* InCtrlChunks */ - SCTP_MIB_INORDERCHUNKS, /* InOrderChunks */ - SCTP_MIB_INUNORDERCHUNKS, /* InUnorderChunks */ - SCTP_MIB_FRAGUSRMSGS, /* FragUsrMsgs */ - SCTP_MIB_REASMUSRMSGS, /* ReasmUsrMsgs */ - SCTP_MIB_OUTSCTPPACKS, /* OutSCTPPacks */ - SCTP_MIB_INSCTPPACKS, /* InSCTPPacks */ - SCTP_MIB_T1_INIT_EXPIREDS, - SCTP_MIB_T1_COOKIE_EXPIREDS, - SCTP_MIB_T2_SHUTDOWN_EXPIREDS, - SCTP_MIB_T3_RTX_EXPIREDS, - SCTP_MIB_T4_RTO_EXPIREDS, - SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS, - SCTP_MIB_DELAY_SACK_EXPIREDS, - SCTP_MIB_AUTOCLOSE_EXPIREDS, - SCTP_MIB_T1_RETRANSMITS, - SCTP_MIB_T3_RETRANSMITS, - SCTP_MIB_PMTUD_RETRANSMITS, - SCTP_MIB_FAST_RETRANSMITS, - SCTP_MIB_IN_PKT_SOFTIRQ, - SCTP_MIB_IN_PKT_BACKLOG, - SCTP_MIB_IN_PKT_DISCARDS, - SCTP_MIB_IN_DATA_CHUNK_DISCARDS, - __SCTP_MIB_MAX -}; - -#define SCTP_MIB_MAX __SCTP_MIB_MAX -struct sctp_mib { - unsigned long mibs[SCTP_MIB_MAX]; -}; - - -/* Print debugging messages. */ -#if SCTP_DEBUG -extern int sctp_debug_flag; -#define SCTP_DEBUG_PRINTK(fmt, args...) \ -do { \ - if (sctp_debug_flag) \ - printk(KERN_DEBUG pr_fmt(fmt), ##args); \ -} while (0) -#define SCTP_DEBUG_PRINTK_CONT(fmt, args...) \ -do { \ - if (sctp_debug_flag) \ - pr_cont(fmt, ##args); \ -} while (0) -#define SCTP_DEBUG_PRINTK_IPADDR(fmt_lead, fmt_trail, \ - args_lead, addr, args_trail...) \ -do { \ - const union sctp_addr *_addr = (addr); \ - if (sctp_debug_flag) { \ - if (_addr->sa.sa_family == AF_INET6) { \ - printk(KERN_DEBUG \ - pr_fmt(fmt_lead "%pI6" fmt_trail), \ - args_lead, \ - &_addr->v6.sin6_addr, \ - args_trail); \ - } else { \ - printk(KERN_DEBUG \ - pr_fmt(fmt_lead "%pI4" fmt_trail), \ - args_lead, \ - &_addr->v4.sin_addr.s_addr, \ - args_trail); \ - } \ - } \ -} while (0) -#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__, __func__, __LINE__); \ - func; \ - } - -#else /* SCTP_DEBUG */ - -#define SCTP_DEBUG_PRINTK(whatever...) -#define SCTP_DEBUG_PRINTK_CONT(fmt, args...) -#define SCTP_DEBUG_PRINTK_IPADDR(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; -extern atomic_t sctp_dbg_objcnt_keys; - -/* 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; } -#endif - -/* Size of Supported Address Parameter for 'x' address types. */ -#define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16)) - -#if IS_ENABLED(CONFIG_IPV6) - -void sctp_v6_pf_init(void); -void sctp_v6_pf_exit(void); -int sctp_v6_protosw_init(void); -void sctp_v6_protosw_exit(void); -int sctp_v6_add_protocol(void); -void sctp_v6_del_protocol(void); - -#else /* #ifdef defined(CONFIG_IPV6) */ - -static inline void sctp_v6_pf_init(void) { return; } -static inline void sctp_v6_pf_exit(void) { return; } -static inline int sctp_v6_protosw_init(void) { return 0; } -static inline void sctp_v6_protosw_exit(void) { return; } -static inline int sctp_v6_add_protocol(void) { return 0; } -static inline void sctp_v6_del_protocol(void) { return; } - -#endif /* #if defined(CONFIG_IPV6) */ - - -/* 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); - -int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp); - -/* A macro to walk a list of skbs. */ -#define sctp_skb_for_each(pos, head, tmp) \ - skb_queue_walk_safe(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); - - skb_queue_splice_tail_init(list, head); - - 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; -} - -/* SCTP version of skb_set_owner_r. We need this one because - * of the way we have to do receive buffer accounting on bundled - * chunks. - */ -static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk) -{ - struct sctp_ulpevent *event = sctp_skb2event(skb); - - skb_orphan(skb); - skb->sk = sk; - skb->destructor = sctp_sock_rfree; - atomic_add(event->rmem_len, &sk->sk_rmem_alloc); - /* - * This mimics the behavior of skb_set_owner_r - */ - sk->sk_forward_alloc -= event->rmem_len; -} - -/* 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); -} - -/* 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_association *asoc, int pmtu) -{ - struct sctp_sock *sp = sctp_sk(asoc->base.sk); - int frag = pmtu; - - frag -= sp->pf->af->net_header_len; - frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk); - - if (asoc->user_frag) - frag = min_t(int, frag, asoc->user_frag); - - frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN); - - return frag; -} - -static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc) -{ - - sctp_assoc_sync_pmtu(asoc); - asoc->pmtu_pending = 0; -} - -/* 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), ntohs((chunk)->chunk_hdr.length), member) - -#define _sctp_walk_params(pos, chunk, end, member)\ -for (pos.v = chunk->member;\ - pos.v <= (void *)chunk + end - 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 - 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 *)kzalloc(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(__be16 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); -} - -#define sctp_for_each_hentry(epb, node, head) \ - hlist_for_each_entry(epb, node, head, node) - -/* 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); -} - -/* The cookie is always 0 since this is how it's used in the - * pmtu code. - */ -static inline struct dst_entry *sctp_transport_dst_check(struct sctp_transport *t) -{ - if (t->dst && !dst_check(t->dst, 0)) { - dst_release(t->dst); - t->dst = NULL; - } - - return t->dst; -} - -#endif /* __net_sctp_h__ */ |