| /* 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. |
| */ |
| |
| |
| |
| #ifdef TEST_FRAME |
| #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 void sctp_local_addr_free(struct rcu_head *head); |
| 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); |
| |
| /* |
| * 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); |
| void sctp_sock_rfree(struct sk_buff *skb); |
| |
| /* |
| * 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); |
| |
| |
| /* |
| * 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) |
| #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 */ |
| |
| /* 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]; |
| } __SNMP_MIB_ALIGN__; |
| |
| |
| /* 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_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \ |
| if (sctp_debug_flag) { \ |
| if (saddr->sa.sa_family == AF_INET6) { \ |
| printk(KERN_DEBUG \ |
| lead NIP6_FMT trail, \ |
| leadparm, \ |
| NIP6(saddr->v6.sin6_addr), \ |
| otherparms); \ |
| } else { \ |
| printk(KERN_DEBUG \ |
| lead NIPQUAD_FMT trail, \ |
| leadparm, \ |
| NIPQUAD(saddr->v4.sin_addr.s_addr), \ |
| otherparms); \ |
| } \ |
| } |
| #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_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 defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| |
| 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 0; } |
| 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); |
| |
| |
| /* 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; |
| } |
| |
| /* 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->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_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; |
| } |
| |
| 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 - sizeof(sctp_paramhdr_t) &&\ |
| 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 - sizeof(sctp_errhdr_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 *)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(__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); |
| } |
| |
| #endif /* __net_sctp_h__ */ |