From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/net/sctp/sctp.h | 620 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 620 insertions(+) create mode 100644 include/net/sctp/sctp.h (limited to 'include/net/sctp/sctp.h') diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h new file mode 100644 index 00000000000..960abfa48d6 --- /dev/null +++ b/include/net/sctp/sctp.h @@ -0,0 +1,620 @@ +/* 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 + * + * Or submit a bug report through the following website: + * http://www.sf.net/projects/lksctp + * + * Written or modified by: + * La Monte H.P. Yarroll + * Xingang Guo + * Jon Grimm + * Daisy Chang + * Sridhar Samudrala + * Ardelle Fan + * Ryan Layer + * Kevin Gao + * + * 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 + +#ifdef TEST_FRAME +#undef CONFIG_PROC_FS +#undef CONFIG_SCTP_DBG_OBJCNT +#undef CONFIG_SYSCTL +#endif /* TEST_FRAME */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#include +#include +#endif + +#include +#include +#include +#include +#include +#include + + +/* 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 +#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__ */ -- cgit v1.2.3