160c778b2SVlad Yasevich /* SCTP kernel implementation 21da177e4SLinus Torvalds * (C) Copyright IBM Corp. 2001, 2004 31da177e4SLinus Torvalds * Copyright (c) 1999-2000 Cisco, Inc. 41da177e4SLinus Torvalds * Copyright (c) 1999-2001 Motorola, Inc. 51da177e4SLinus Torvalds * Copyright (c) 2001-2003 Intel Corp. 61da177e4SLinus Torvalds * 760c778b2SVlad Yasevich * This file is part of the SCTP kernel implementation 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * The base lksctp header. 101da177e4SLinus Torvalds * 1160c778b2SVlad Yasevich * This SCTP implementation is free software; 121da177e4SLinus Torvalds * you can redistribute it and/or modify it under the terms of 131da177e4SLinus Torvalds * the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation; either version 2, or (at your option) 151da177e4SLinus Torvalds * any later version. 161da177e4SLinus Torvalds * 1760c778b2SVlad Yasevich * This SCTP implementation is distributed in the hope that it 181da177e4SLinus Torvalds * will be useful, but WITHOUT ANY WARRANTY; without even the implied 191da177e4SLinus Torvalds * ************************ 201da177e4SLinus Torvalds * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 211da177e4SLinus Torvalds * See the GNU General Public License for more details. 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 241da177e4SLinus Torvalds * along with GNU CC; see the file COPYING. If not, write to 251da177e4SLinus Torvalds * the Free Software Foundation, 59 Temple Place - Suite 330, 261da177e4SLinus Torvalds * Boston, MA 02111-1307, USA. 271da177e4SLinus Torvalds * 281da177e4SLinus Torvalds * Please send any bug reports or fixes you make to the 291da177e4SLinus Torvalds * email address(es): 301da177e4SLinus Torvalds * lksctp developers <lksctp-developers@lists.sourceforge.net> 311da177e4SLinus Torvalds * 321da177e4SLinus Torvalds * Or submit a bug report through the following website: 331da177e4SLinus Torvalds * http://www.sf.net/projects/lksctp 341da177e4SLinus Torvalds * 351da177e4SLinus Torvalds * Written or modified by: 361da177e4SLinus Torvalds * La Monte H.P. Yarroll <piggy@acm.org> 371da177e4SLinus Torvalds * Xingang Guo <xingang.guo@intel.com> 381da177e4SLinus Torvalds * Jon Grimm <jgrimm@us.ibm.com> 391da177e4SLinus Torvalds * Daisy Chang <daisyc@us.ibm.com> 401da177e4SLinus Torvalds * Sridhar Samudrala <sri@us.ibm.com> 411da177e4SLinus Torvalds * Ardelle Fan <ardelle.fan@intel.com> 421da177e4SLinus Torvalds * Ryan Layer <rmlayer@us.ibm.com> 431da177e4SLinus Torvalds * Kevin Gao <kevin.gao@intel.com> 441da177e4SLinus Torvalds * 451da177e4SLinus Torvalds * Any bugs reported given to us we will try to fix... any fixes shared will 461da177e4SLinus Torvalds * be incorporated into the next SCTP release. 471da177e4SLinus Torvalds */ 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds #ifndef __net_sctp_h__ 501da177e4SLinus Torvalds #define __net_sctp_h__ 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds /* Header Strategy. 531da177e4SLinus Torvalds * Start getting some control over the header file depencies: 541da177e4SLinus Torvalds * includes 551da177e4SLinus Torvalds * constants 561da177e4SLinus Torvalds * structs 571da177e4SLinus Torvalds * prototypes 581da177e4SLinus Torvalds * macros, externs, and inlines 591da177e4SLinus Torvalds * 601da177e4SLinus Torvalds * Move test_frame specific items out of the kernel headers 611da177e4SLinus Torvalds * and into the test frame headers. This is not perfect in any sense 621da177e4SLinus Torvalds * and will continue to evolve. 631da177e4SLinus Torvalds */ 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds #include <linux/types.h> 661da177e4SLinus Torvalds #include <linux/slab.h> 671da177e4SLinus Torvalds #include <linux/in.h> 681da177e4SLinus Torvalds #include <linux/tty.h> 691da177e4SLinus Torvalds #include <linux/proc_fs.h> 701da177e4SLinus Torvalds #include <linux/spinlock.h> 711da177e4SLinus Torvalds #include <linux/jiffies.h> 721da177e4SLinus Torvalds #include <linux/idr.h> 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 751da177e4SLinus Torvalds #include <net/ipv6.h> 761da177e4SLinus Torvalds #include <net/ip6_route.h> 771da177e4SLinus Torvalds #endif 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds #include <asm/uaccess.h> 801da177e4SLinus Torvalds #include <asm/page.h> 811da177e4SLinus Torvalds #include <net/sock.h> 821da177e4SLinus Torvalds #include <net/snmp.h> 831da177e4SLinus Torvalds #include <net/sctp/structs.h> 841da177e4SLinus Torvalds #include <net/sctp/constants.h> 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds /* Set SCTP_DEBUG flag via config if not already set. */ 881da177e4SLinus Torvalds #ifndef SCTP_DEBUG 891da177e4SLinus Torvalds #ifdef CONFIG_SCTP_DBG_MSG 901da177e4SLinus Torvalds #define SCTP_DEBUG 1 911da177e4SLinus Torvalds #else 921da177e4SLinus Torvalds #define SCTP_DEBUG 0 931da177e4SLinus Torvalds #endif /* CONFIG_SCTP_DBG */ 941da177e4SLinus Torvalds #endif /* SCTP_DEBUG */ 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds #ifdef CONFIG_IP_SCTP_MODULE 971da177e4SLinus Torvalds #define SCTP_PROTOSW_FLAG 0 981da177e4SLinus Torvalds #else /* static! */ 991da177e4SLinus Torvalds #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT 1001da177e4SLinus Torvalds #endif 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds /* Certain internal static functions need to be exported when 1041da177e4SLinus Torvalds * compiled into the test frame. 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds #ifndef SCTP_STATIC 1071da177e4SLinus Torvalds #define SCTP_STATIC static 1081da177e4SLinus Torvalds #endif 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds /* 1111da177e4SLinus Torvalds * Function declarations. 1121da177e4SLinus Torvalds */ 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds /* 1151da177e4SLinus Torvalds * sctp/protocol.c 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds extern struct sock *sctp_get_ctl_sock(void); 1181da177e4SLinus Torvalds extern int sctp_copy_local_addr_list(struct sctp_bind_addr *, 119dd0fc66fSAl Viro sctp_scope_t, gfp_t gfp, 1203182cd84SAlexey Dobriyan int flags); 1211da177e4SLinus Torvalds extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family); 1221da177e4SLinus Torvalds extern int sctp_register_pf(struct sctp_pf *, sa_family_t); 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds /* 1251da177e4SLinus Torvalds * sctp/socket.c 1261da177e4SLinus Torvalds */ 1271da177e4SLinus Torvalds int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb); 1281da177e4SLinus Torvalds int sctp_inet_listen(struct socket *sock, int backlog); 1291da177e4SLinus Torvalds void sctp_write_space(struct sock *sk); 130561b1733SWei Yongjun void sctp_data_ready(struct sock *sk, int len); 1311da177e4SLinus Torvalds unsigned int sctp_poll(struct file *file, struct socket *sock, 1321da177e4SLinus Torvalds poll_table *wait); 133331c4ee7SVlad Yasevich void sctp_sock_rfree(struct sk_buff *skb); 134914e1c8bSVlad Yasevich void sctp_copy_sock(struct sock *newsk, struct sock *sk, 135914e1c8bSVlad Yasevich struct sctp_association *asoc); 1361748376bSEric Dumazet extern struct percpu_counter sctp_sockets_allocated; 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds /* 1391da177e4SLinus Torvalds * sctp/primitive.c 1401da177e4SLinus Torvalds */ 1411da177e4SLinus Torvalds int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg); 1421da177e4SLinus Torvalds int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg); 1431da177e4SLinus Torvalds int sctp_primitive_ABORT(struct sctp_association *, void *arg); 1441da177e4SLinus Torvalds int sctp_primitive_SEND(struct sctp_association *, void *arg); 1451da177e4SLinus Torvalds int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg); 1461da177e4SLinus Torvalds int sctp_primitive_ASCONF(struct sctp_association *, void *arg); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* 1491da177e4SLinus Torvalds * sctp/input.c 1501da177e4SLinus Torvalds */ 1511da177e4SLinus Torvalds int sctp_rcv(struct sk_buff *skb); 1521da177e4SLinus Torvalds void sctp_v4_err(struct sk_buff *skb, u32 info); 1531da177e4SLinus Torvalds void sctp_hash_established(struct sctp_association *); 1541da177e4SLinus Torvalds void sctp_unhash_established(struct sctp_association *); 1551da177e4SLinus Torvalds void sctp_hash_endpoint(struct sctp_endpoint *); 1561da177e4SLinus Torvalds void sctp_unhash_endpoint(struct sctp_endpoint *); 1571da177e4SLinus Torvalds struct sock *sctp_err_lookup(int family, struct sk_buff *, 158d1ad1ff2SSridhar Samudrala struct sctphdr *, struct sctp_association **, 1591da177e4SLinus Torvalds struct sctp_transport **); 160d1ad1ff2SSridhar Samudrala void sctp_err_finish(struct sock *, struct sctp_association *); 1611da177e4SLinus Torvalds void sctp_icmp_frag_needed(struct sock *, struct sctp_association *, 1621da177e4SLinus Torvalds struct sctp_transport *t, __u32 pmtu); 1631da177e4SLinus Torvalds void sctp_icmp_proto_unreachable(struct sock *sk, 1641da177e4SLinus Torvalds struct sctp_association *asoc, 1651da177e4SLinus Torvalds struct sctp_transport *t); 166c4d2444eSSridhar Samudrala void sctp_backlog_migrate(struct sctp_association *assoc, 167c4d2444eSSridhar Samudrala struct sock *oldsk, struct sock *newsk); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* 17016164366SAdrian Bunk * sctp/proc.c 17116164366SAdrian Bunk */ 17216164366SAdrian Bunk int sctp_snmp_proc_init(void); 17316164366SAdrian Bunk void sctp_snmp_proc_exit(void); 17416164366SAdrian Bunk int sctp_eps_proc_init(void); 17516164366SAdrian Bunk void sctp_eps_proc_exit(void); 17616164366SAdrian Bunk int sctp_assocs_proc_init(void); 17716164366SAdrian Bunk void sctp_assocs_proc_exit(void); 17820c2c1fdSNeil Horman int sctp_remaddr_proc_init(void); 17920c2c1fdSNeil Horman void sctp_remaddr_proc_exit(void); 18016164366SAdrian Bunk 18116164366SAdrian Bunk 18216164366SAdrian Bunk /* 1830a5fcb9cSsebastian@breakpoint.cc * Module global variables 1840a5fcb9cSsebastian@breakpoint.cc */ 1850a5fcb9cSsebastian@breakpoint.cc 1860a5fcb9cSsebastian@breakpoint.cc /* 1870a5fcb9cSsebastian@breakpoint.cc * sctp/protocol.c 1880a5fcb9cSsebastian@breakpoint.cc */ 1890a5fcb9cSsebastian@breakpoint.cc extern struct kmem_cache *sctp_chunk_cachep __read_mostly; 1900a5fcb9cSsebastian@breakpoint.cc extern struct kmem_cache *sctp_bucket_cachep __read_mostly; 1910a5fcb9cSsebastian@breakpoint.cc 1920a5fcb9cSsebastian@breakpoint.cc /* 1931da177e4SLinus Torvalds * Section: Macros, externs, and inlines 1941da177e4SLinus Torvalds */ 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds #ifdef TEST_FRAME 1981da177e4SLinus Torvalds #include <test_frame.h> 1991da177e4SLinus Torvalds #else 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds /* spin lock wrappers. */ 2021da177e4SLinus Torvalds #define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags) 2031da177e4SLinus Torvalds #define sctp_spin_unlock_irqrestore(lock, flags) \ 2041da177e4SLinus Torvalds spin_unlock_irqrestore(lock, flags) 2051da177e4SLinus Torvalds #define sctp_local_bh_disable() local_bh_disable() 2061da177e4SLinus Torvalds #define sctp_local_bh_enable() local_bh_enable() 2071da177e4SLinus Torvalds #define sctp_spin_lock(lock) spin_lock(lock) 2081da177e4SLinus Torvalds #define sctp_spin_unlock(lock) spin_unlock(lock) 2091da177e4SLinus Torvalds #define sctp_write_lock(lock) write_lock(lock) 2101da177e4SLinus Torvalds #define sctp_write_unlock(lock) write_unlock(lock) 2111da177e4SLinus Torvalds #define sctp_read_lock(lock) read_lock(lock) 2121da177e4SLinus Torvalds #define sctp_read_unlock(lock) read_unlock(lock) 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* sock lock wrappers. */ 2151da177e4SLinus Torvalds #define sctp_lock_sock(sk) lock_sock(sk) 2161da177e4SLinus Torvalds #define sctp_release_sock(sk) release_sock(sk) 2171da177e4SLinus Torvalds #define sctp_bh_lock_sock(sk) bh_lock_sock(sk) 2181da177e4SLinus Torvalds #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk) 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds /* SCTP SNMP MIB stats handlers */ 2211da177e4SLinus Torvalds DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics); 2221da177e4SLinus Torvalds #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field) 2231da177e4SLinus Torvalds #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field) 2241da177e4SLinus Torvalds #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field) 2251da177e4SLinus Torvalds #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field) 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds #endif /* !TEST_FRAME */ 2281da177e4SLinus Torvalds 229ac0b0462SSridhar Samudrala /* sctp mib definitions */ 230fd2c3ef7SEric Dumazet enum { 231ac0b0462SSridhar Samudrala SCTP_MIB_NUM = 0, 232ac0b0462SSridhar Samudrala SCTP_MIB_CURRESTAB, /* CurrEstab */ 233ac0b0462SSridhar Samudrala SCTP_MIB_ACTIVEESTABS, /* ActiveEstabs */ 234ac0b0462SSridhar Samudrala SCTP_MIB_PASSIVEESTABS, /* PassiveEstabs */ 235ac0b0462SSridhar Samudrala SCTP_MIB_ABORTEDS, /* Aborteds */ 236ac0b0462SSridhar Samudrala SCTP_MIB_SHUTDOWNS, /* Shutdowns */ 237ac0b0462SSridhar Samudrala SCTP_MIB_OUTOFBLUES, /* OutOfBlues */ 238ac0b0462SSridhar Samudrala SCTP_MIB_CHECKSUMERRORS, /* ChecksumErrors */ 239ac0b0462SSridhar Samudrala SCTP_MIB_OUTCTRLCHUNKS, /* OutCtrlChunks */ 240ac0b0462SSridhar Samudrala SCTP_MIB_OUTORDERCHUNKS, /* OutOrderChunks */ 241ac0b0462SSridhar Samudrala SCTP_MIB_OUTUNORDERCHUNKS, /* OutUnorderChunks */ 242ac0b0462SSridhar Samudrala SCTP_MIB_INCTRLCHUNKS, /* InCtrlChunks */ 243ac0b0462SSridhar Samudrala SCTP_MIB_INORDERCHUNKS, /* InOrderChunks */ 244ac0b0462SSridhar Samudrala SCTP_MIB_INUNORDERCHUNKS, /* InUnorderChunks */ 245ac0b0462SSridhar Samudrala SCTP_MIB_FRAGUSRMSGS, /* FragUsrMsgs */ 246ac0b0462SSridhar Samudrala SCTP_MIB_REASMUSRMSGS, /* ReasmUsrMsgs */ 247ac0b0462SSridhar Samudrala SCTP_MIB_OUTSCTPPACKS, /* OutSCTPPacks */ 248ac0b0462SSridhar Samudrala SCTP_MIB_INSCTPPACKS, /* InSCTPPacks */ 249ac0b0462SSridhar Samudrala SCTP_MIB_T1_INIT_EXPIREDS, 250ac0b0462SSridhar Samudrala SCTP_MIB_T1_COOKIE_EXPIREDS, 251ac0b0462SSridhar Samudrala SCTP_MIB_T2_SHUTDOWN_EXPIREDS, 252ac0b0462SSridhar Samudrala SCTP_MIB_T3_RTX_EXPIREDS, 253ac0b0462SSridhar Samudrala SCTP_MIB_T4_RTO_EXPIREDS, 254ac0b0462SSridhar Samudrala SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS, 255ac0b0462SSridhar Samudrala SCTP_MIB_DELAY_SACK_EXPIREDS, 256ac0b0462SSridhar Samudrala SCTP_MIB_AUTOCLOSE_EXPIREDS, 257b6157d8eSVlad Yasevich SCTP_MIB_T1_RETRANSMITS, 258ac0b0462SSridhar Samudrala SCTP_MIB_T3_RETRANSMITS, 259ac0b0462SSridhar Samudrala SCTP_MIB_PMTUD_RETRANSMITS, 260ac0b0462SSridhar Samudrala SCTP_MIB_FAST_RETRANSMITS, 261ac0b0462SSridhar Samudrala SCTP_MIB_IN_PKT_SOFTIRQ, 262ac0b0462SSridhar Samudrala SCTP_MIB_IN_PKT_BACKLOG, 263ac0b0462SSridhar Samudrala SCTP_MIB_IN_PKT_DISCARDS, 264ac0b0462SSridhar Samudrala SCTP_MIB_IN_DATA_CHUNK_DISCARDS, 265ac0b0462SSridhar Samudrala __SCTP_MIB_MAX 266ac0b0462SSridhar Samudrala }; 267ac0b0462SSridhar Samudrala 268ac0b0462SSridhar Samudrala #define SCTP_MIB_MAX __SCTP_MIB_MAX 269ac0b0462SSridhar Samudrala struct sctp_mib { 270ac0b0462SSridhar Samudrala unsigned long mibs[SCTP_MIB_MAX]; 271ec733b15SEric Dumazet }; 272ac0b0462SSridhar Samudrala 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds /* Print debugging messages. */ 2751da177e4SLinus Torvalds #if SCTP_DEBUG 2761da177e4SLinus Torvalds extern int sctp_debug_flag; 277145ce502SJoe Perches #define SCTP_DEBUG_PRINTK(fmt, args...) \ 278145ce502SJoe Perches do { \ 279145ce502SJoe Perches if (sctp_debug_flag) \ 280145ce502SJoe Perches printk(KERN_DEBUG pr_fmt(fmt), ##args); \ 281145ce502SJoe Perches } while (0) 282145ce502SJoe Perches #define SCTP_DEBUG_PRINTK_CONT(fmt, args...) \ 283145ce502SJoe Perches do { \ 284145ce502SJoe Perches if (sctp_debug_flag) \ 285145ce502SJoe Perches pr_cont(fmt, ##args); \ 286145ce502SJoe Perches } while (0) 287145ce502SJoe Perches #define SCTP_DEBUG_PRINTK_IPADDR(fmt_lead, fmt_trail, \ 2883ced2dddSYOSHIFUJI Hideaki args_lead, addr, args_trail...) \ 289145ce502SJoe Perches do { \ 2903ced2dddSYOSHIFUJI Hideaki const union sctp_addr *_addr = (addr); \ 2913f7a87d2SFrank Filz if (sctp_debug_flag) { \ 2923ced2dddSYOSHIFUJI Hideaki if (_addr->sa.sa_family == AF_INET6) { \ 2933f7a87d2SFrank Filz printk(KERN_DEBUG \ 294145ce502SJoe Perches pr_fmt(fmt_lead "%pI6" fmt_trail), \ 295145ce502SJoe Perches args_lead, \ 2963ced2dddSYOSHIFUJI Hideaki &_addr->v6.sin6_addr, \ 297145ce502SJoe Perches args_trail); \ 2983f7a87d2SFrank Filz } else { \ 2993f7a87d2SFrank Filz printk(KERN_DEBUG \ 300145ce502SJoe Perches pr_fmt(fmt_lead "%pI4" fmt_trail), \ 301145ce502SJoe Perches args_lead, \ 3023ced2dddSYOSHIFUJI Hideaki &_addr->v4.sin_addr.s_addr, \ 303145ce502SJoe Perches args_trail); \ 3043f7a87d2SFrank Filz } \ 305145ce502SJoe Perches } \ 306145ce502SJoe Perches } while (0) 3071da177e4SLinus Torvalds #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; } 3081da177e4SLinus Torvalds #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; } 3091da177e4SLinus Torvalds 3101da177e4SLinus Torvalds #define SCTP_ASSERT(expr, str, func) \ 3111da177e4SLinus Torvalds if (!(expr)) { \ 3121da177e4SLinus Torvalds SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \ 313d5c003b4SHarvey Harrison str, (#expr), __FILE__, __func__, __LINE__); \ 3141da177e4SLinus Torvalds func; \ 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds #else /* SCTP_DEBUG */ 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds #define SCTP_DEBUG_PRINTK(whatever...) 320145ce502SJoe Perches #define SCTP_DEBUG_PRINTK_CONT(fmt, args...) 3213f7a87d2SFrank Filz #define SCTP_DEBUG_PRINTK_IPADDR(whatever...) 3221da177e4SLinus Torvalds #define SCTP_ENABLE_DEBUG 3231da177e4SLinus Torvalds #define SCTP_DISABLE_DEBUG 32465fd28f7SDavid S. Miller #define SCTP_ASSERT(expr, str, func) 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds #endif /* SCTP_DEBUG */ 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds /* 3301da177e4SLinus Torvalds * Macros for keeping a global reference of object allocations. 3311da177e4SLinus Torvalds */ 3321da177e4SLinus Torvalds #ifdef CONFIG_SCTP_DBG_OBJCNT 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_sock; 3351da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_ep; 3361da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_assoc; 3371da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_transport; 3381da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_chunk; 3391da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_bind_addr; 3401da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_bind_bucket; 3411da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_addr; 3421da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_ssnmap; 3431da177e4SLinus Torvalds extern atomic_t sctp_dbg_objcnt_datamsg; 3441f485649SVlad Yasevich extern atomic_t sctp_dbg_objcnt_keys; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds /* Macros to atomically increment/decrement objcnt counters. */ 3471da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT_INC(name) \ 3481da177e4SLinus Torvalds atomic_inc(&sctp_dbg_objcnt_## name) 3491da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT_DEC(name) \ 3501da177e4SLinus Torvalds atomic_dec(&sctp_dbg_objcnt_## name) 3511da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT(name) \ 3521da177e4SLinus Torvalds atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0) 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* Macro to help create new entries in in the global array of 3551da177e4SLinus Torvalds * objcnt counters. 3561da177e4SLinus Torvalds */ 3571da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT_ENTRY(name) \ 3581da177e4SLinus Torvalds {.label= #name, .counter= &sctp_dbg_objcnt_## name} 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds void sctp_dbg_objcnt_init(void); 3611da177e4SLinus Torvalds void sctp_dbg_objcnt_exit(void); 3621da177e4SLinus Torvalds 3631da177e4SLinus Torvalds #else 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT_INC(name) 3661da177e4SLinus Torvalds #define SCTP_DBG_OBJCNT_DEC(name) 3671da177e4SLinus Torvalds 3681da177e4SLinus Torvalds static inline void sctp_dbg_objcnt_init(void) { return; } 3691da177e4SLinus Torvalds static inline void sctp_dbg_objcnt_exit(void) { return; } 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds #endif /* CONFIG_SCTP_DBG_OBJCOUNT */ 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds #if defined CONFIG_SYSCTL 3741da177e4SLinus Torvalds void sctp_sysctl_register(void); 3751da177e4SLinus Torvalds void sctp_sysctl_unregister(void); 3761da177e4SLinus Torvalds #else 3771da177e4SLinus Torvalds static inline void sctp_sysctl_register(void) { return; } 3781da177e4SLinus Torvalds static inline void sctp_sysctl_unregister(void) { return; } 3791da177e4SLinus Torvalds #endif 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds /* Size of Supported Address Parameter for 'x' address types. */ 3821da177e4SLinus Torvalds #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16)) 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) 3851da177e4SLinus Torvalds 386270637abSVlad Yasevich void sctp_v6_pf_init(void); 387270637abSVlad Yasevich void sctp_v6_pf_exit(void); 388270637abSVlad Yasevich int sctp_v6_protosw_init(void); 389270637abSVlad Yasevich void sctp_v6_protosw_exit(void); 390827bf122SSridhar Samudrala int sctp_v6_add_protocol(void); 391827bf122SSridhar Samudrala void sctp_v6_del_protocol(void); 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds #else /* #ifdef defined(CONFIG_IPV6) */ 3941da177e4SLinus Torvalds 3951233823bSDavid S. Miller static inline void sctp_v6_pf_init(void) { return; } 396270637abSVlad Yasevich static inline void sctp_v6_pf_exit(void) { return; } 397270637abSVlad Yasevich static inline int sctp_v6_protosw_init(void) { return 0; } 398270637abSVlad Yasevich static inline void sctp_v6_protosw_exit(void) { return; } 399827bf122SSridhar Samudrala static inline int sctp_v6_add_protocol(void) { return 0; } 400827bf122SSridhar Samudrala static inline void sctp_v6_del_protocol(void) { return; } 4011da177e4SLinus Torvalds 4021da177e4SLinus Torvalds #endif /* #if defined(CONFIG_IPV6) */ 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds /* Map an association to an assoc_id. */ 4061da177e4SLinus Torvalds static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc) 4071da177e4SLinus Torvalds { 408a02cec21SEric Dumazet return asoc ? asoc->assoc_id : 0; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds /* Look up the association by its id. */ 4121da177e4SLinus Torvalds struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* A macro to walk a list of skbs. */ 4161da177e4SLinus Torvalds #define sctp_skb_for_each(pos, head, tmp) \ 4173d09274cSDavid S. Miller skb_queue_walk_safe(head, pos, tmp) 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* A helper to append an entire skb list (list) to another (head). */ 4201da177e4SLinus Torvalds static inline void sctp_skb_list_tail(struct sk_buff_head *list, 4211da177e4SLinus Torvalds struct sk_buff_head *head) 4221da177e4SLinus Torvalds { 4231da177e4SLinus Torvalds unsigned long flags; 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds sctp_spin_lock_irqsave(&head->lock, flags); 4261da177e4SLinus Torvalds sctp_spin_lock(&list->lock); 4271da177e4SLinus Torvalds 4283d09274cSDavid S. Miller skb_queue_splice_tail_init(list, head); 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds sctp_spin_unlock(&list->lock); 4311da177e4SLinus Torvalds sctp_spin_unlock_irqrestore(&head->lock, flags); 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds /** 4351da177e4SLinus Torvalds * sctp_list_dequeue - remove from the head of the queue 4361da177e4SLinus Torvalds * @list: list to dequeue from 4371da177e4SLinus Torvalds * 4381da177e4SLinus Torvalds * Remove the head of the list. The head item is 4391da177e4SLinus Torvalds * returned or %NULL if the list is empty. 4401da177e4SLinus Torvalds */ 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds static inline struct list_head *sctp_list_dequeue(struct list_head *list) 4431da177e4SLinus Torvalds { 4441da177e4SLinus Torvalds struct list_head *result = NULL; 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds if (list->next != list) { 4471da177e4SLinus Torvalds result = list->next; 4481da177e4SLinus Torvalds list->next = result->next; 4491da177e4SLinus Torvalds list->next->prev = list; 4501da177e4SLinus Torvalds INIT_LIST_HEAD(result); 4511da177e4SLinus Torvalds } 4521da177e4SLinus Torvalds return result; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 455331c4ee7SVlad Yasevich /* SCTP version of skb_set_owner_r. We need this one because 456331c4ee7SVlad Yasevich * of the way we have to do receive buffer accounting on bundled 457331c4ee7SVlad Yasevich * chunks. 458331c4ee7SVlad Yasevich */ 459331c4ee7SVlad Yasevich static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk) 460331c4ee7SVlad Yasevich { 461331c4ee7SVlad Yasevich struct sctp_ulpevent *event = sctp_skb2event(skb); 462331c4ee7SVlad Yasevich 463d55d87fdSHerbert Xu skb_orphan(skb); 464331c4ee7SVlad Yasevich skb->sk = sk; 465331c4ee7SVlad Yasevich skb->destructor = sctp_sock_rfree; 466331c4ee7SVlad Yasevich atomic_add(event->rmem_len, &sk->sk_rmem_alloc); 4674d93df0aSNeil Horman /* 4683ab224beSHideo Aoki * This mimics the behavior of skb_set_owner_r 4694d93df0aSNeil Horman */ 4704d93df0aSNeil Horman sk->sk_forward_alloc -= event->rmem_len; 471331c4ee7SVlad Yasevich } 472331c4ee7SVlad Yasevich 4731da177e4SLinus Torvalds /* Tests if the list has one and only one entry. */ 4741da177e4SLinus Torvalds static inline int sctp_list_single_entry(struct list_head *head) 4751da177e4SLinus Torvalds { 476a02cec21SEric Dumazet return (head->next != head) && (head->next == head->prev); 4771da177e4SLinus Torvalds } 4781da177e4SLinus Torvalds 4791da177e4SLinus Torvalds /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */ 4801da177e4SLinus Torvalds static inline __s32 sctp_jitter(__u32 rto) 4811da177e4SLinus Torvalds { 4821da177e4SLinus Torvalds static __u32 sctp_rand; 4831da177e4SLinus Torvalds __s32 ret; 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /* Avoid divide by zero. */ 4861da177e4SLinus Torvalds if (!rto) 4871da177e4SLinus Torvalds rto = 1; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds sctp_rand += jiffies; 4901da177e4SLinus Torvalds sctp_rand ^= (sctp_rand << 12); 4911da177e4SLinus Torvalds sctp_rand ^= (sctp_rand >> 20); 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds /* Choose random number from 0 to rto, then move to -50% ~ +50% 4941da177e4SLinus Torvalds * of rto. 4951da177e4SLinus Torvalds */ 4961da177e4SLinus Torvalds ret = sctp_rand % rto - (rto >> 1); 4971da177e4SLinus Torvalds return ret; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds /* Break down data chunks at this point. */ 501f68b2e05SVlad Yasevich static inline int sctp_frag_point(const struct sctp_association *asoc, int pmtu) 5021da177e4SLinus Torvalds { 503f68b2e05SVlad Yasevich struct sctp_sock *sp = sctp_sk(asoc->base.sk); 5041da177e4SLinus Torvalds int frag = pmtu; 5051da177e4SLinus Torvalds 5061da177e4SLinus Torvalds frag -= sp->pf->af->net_header_len; 5071da177e4SLinus Torvalds frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk); 5081da177e4SLinus Torvalds 509f68b2e05SVlad Yasevich if (asoc->user_frag) 510f68b2e05SVlad Yasevich frag = min_t(int, frag, asoc->user_frag); 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN); 5131da177e4SLinus Torvalds 5141da177e4SLinus Torvalds return frag; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 5178a479491SVlad Yasevich static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc) 5188a479491SVlad Yasevich { 5198a479491SVlad Yasevich 5208a479491SVlad Yasevich sctp_assoc_sync_pmtu(asoc); 5218a479491SVlad Yasevich asoc->pmtu_pending = 0; 5228a479491SVlad Yasevich } 5238a479491SVlad Yasevich 5241da177e4SLinus Torvalds /* Walk through a list of TLV parameters. Don't trust the 5251da177e4SLinus Torvalds * individual parameter lengths and instead depend on 5261da177e4SLinus Torvalds * the chunk length to indicate when to stop. Make sure 5271da177e4SLinus Torvalds * there is room for a param header too. 5281da177e4SLinus Torvalds */ 5291da177e4SLinus Torvalds #define sctp_walk_params(pos, chunk, member)\ 530dd2d1c6fSVladislav Yasevich _sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member) 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds #define _sctp_walk_params(pos, chunk, end, member)\ 5331da177e4SLinus Torvalds for (pos.v = chunk->member;\ 534dd2d1c6fSVladislav Yasevich pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\ 5351da177e4SLinus Torvalds ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\ 5361da177e4SLinus Torvalds pos.v += WORD_ROUND(ntohs(pos.p->length))) 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds #define sctp_walk_errors(err, chunk_hdr)\ 5391da177e4SLinus Torvalds _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length)) 5401da177e4SLinus Torvalds 5411da177e4SLinus Torvalds #define _sctp_walk_errors(err, chunk_hdr, end)\ 5421da177e4SLinus Torvalds for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \ 5431da177e4SLinus Torvalds sizeof(sctp_chunkhdr_t));\ 544dd2d1c6fSVladislav Yasevich (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\ 5451da177e4SLinus Torvalds ntohs(err->length) >= sizeof(sctp_errhdr_t); \ 5461da177e4SLinus Torvalds err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length)))) 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds #define sctp_walk_fwdtsn(pos, chunk)\ 5491da177e4SLinus Torvalds _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk)) 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds #define _sctp_walk_fwdtsn(pos, chunk, end)\ 5521da177e4SLinus Torvalds for (pos = chunk->subh.fwdtsn_hdr->skip;\ 5531da177e4SLinus Torvalds (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\ 5541da177e4SLinus Torvalds pos++) 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds /* Round an int up to the next multiple of 4. */ 5571da177e4SLinus Torvalds #define WORD_ROUND(s) (((s)+3)&~3) 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds /* Make a new instance of type. */ 560b2cf9b6bSVlad Yasevich #define t_new(type, flags) (type *)kzalloc(sizeof(type), flags) 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds /* Compare two timevals. */ 5631da177e4SLinus Torvalds #define tv_lt(s, t) \ 5641da177e4SLinus Torvalds (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec)) 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds /* Add tv1 to tv2. */ 5671da177e4SLinus Torvalds #define TIMEVAL_ADD(tv1, tv2) \ 5681da177e4SLinus Torvalds ({ \ 5691da177e4SLinus Torvalds suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \ 5701da177e4SLinus Torvalds time_t secs = (tv2).tv_sec + (tv1).tv_sec; \ 5711da177e4SLinus Torvalds \ 5721da177e4SLinus Torvalds if (usecs >= 1000000) { \ 5731da177e4SLinus Torvalds usecs -= 1000000; \ 5741da177e4SLinus Torvalds secs++; \ 5751da177e4SLinus Torvalds } \ 5761da177e4SLinus Torvalds (tv2).tv_sec = secs; \ 5771da177e4SLinus Torvalds (tv2).tv_usec = usecs; \ 5781da177e4SLinus Torvalds }) 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds /* External references. */ 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds extern struct proto sctp_prot; 5831da177e4SLinus Torvalds extern struct proto sctpv6_prot; 5841da177e4SLinus Torvalds extern struct proc_dir_entry *proc_net_sctp; 5851da177e4SLinus Torvalds void sctp_put_port(struct sock *sk); 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds extern struct idr sctp_assocs_id; 5881da177e4SLinus Torvalds extern spinlock_t sctp_assocs_id_lock; 5891da177e4SLinus Torvalds 5901da177e4SLinus Torvalds /* Static inline functions. */ 5911da177e4SLinus Torvalds 5921da177e4SLinus Torvalds /* Convert from an IP version number to an Address Family symbol. */ 5931da177e4SLinus Torvalds static inline int ipver2af(__u8 ipver) 5941da177e4SLinus Torvalds { 5951da177e4SLinus Torvalds switch (ipver) { 5961da177e4SLinus Torvalds case 4: 5971da177e4SLinus Torvalds return AF_INET; 5981da177e4SLinus Torvalds case 6: 5991da177e4SLinus Torvalds return AF_INET6; 6001da177e4SLinus Torvalds default: 6011da177e4SLinus Torvalds return 0; 6021da177e4SLinus Torvalds }; 6031da177e4SLinus Torvalds } 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds /* Convert from an address parameter type to an address family. */ 606dbc16db1SAl Viro static inline int param_type2af(__be16 type) 6071da177e4SLinus Torvalds { 6081da177e4SLinus Torvalds switch (type) { 6091da177e4SLinus Torvalds case SCTP_PARAM_IPV4_ADDRESS: 6101da177e4SLinus Torvalds return AF_INET; 6111da177e4SLinus Torvalds case SCTP_PARAM_IPV6_ADDRESS: 6121da177e4SLinus Torvalds return AF_INET6; 6131da177e4SLinus Torvalds default: 6141da177e4SLinus Torvalds return 0; 6151da177e4SLinus Torvalds }; 6161da177e4SLinus Torvalds } 6171da177e4SLinus Torvalds 6181da177e4SLinus Torvalds /* Perform some sanity checks. */ 6191da177e4SLinus Torvalds static inline int sctp_sanity_check(void) 6201da177e4SLinus Torvalds { 6211da177e4SLinus Torvalds SCTP_ASSERT(sizeof(struct sctp_ulpevent) <= 6221da177e4SLinus Torvalds sizeof(((struct sk_buff *)0)->cb), 6231da177e4SLinus Torvalds "SCTP: ulpevent does not fit in skb!\n", return 0); 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds return 1; 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds /* Warning: The following hash functions assume a power of two 'size'. */ 6291da177e4SLinus Torvalds /* This is the hash function for the SCTP port hash table. */ 6301da177e4SLinus Torvalds static inline int sctp_phashfn(__u16 lport) 6311da177e4SLinus Torvalds { 632a02cec21SEric Dumazet return lport & (sctp_port_hashsize - 1); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* This is the hash function for the endpoint hash table. */ 6361da177e4SLinus Torvalds static inline int sctp_ep_hashfn(__u16 lport) 6371da177e4SLinus Torvalds { 638a02cec21SEric Dumazet return lport & (sctp_ep_hashsize - 1); 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds /* This is the hash function for the association hash table. */ 6421da177e4SLinus Torvalds static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds int h = (lport << 16) + rport; 6451da177e4SLinus Torvalds h ^= h>>8; 646a02cec21SEric Dumazet return h & (sctp_assoc_hashsize - 1); 6471da177e4SLinus Torvalds } 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /* This is the hash function for the association hash table. This is 6501da177e4SLinus Torvalds * not used yet, but could be used as a better hash function when 6511da177e4SLinus Torvalds * we have a vtag. 6521da177e4SLinus Torvalds */ 6531da177e4SLinus Torvalds static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag) 6541da177e4SLinus Torvalds { 6551da177e4SLinus Torvalds int h = (lport << 16) + rport; 6561da177e4SLinus Torvalds h ^= vtag; 657a02cec21SEric Dumazet return h & (sctp_assoc_hashsize - 1); 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds 660d970dbf8SVlad Yasevich #define sctp_for_each_hentry(epb, node, head) \ 661d970dbf8SVlad Yasevich hlist_for_each_entry(epb, node, head, node) 662d970dbf8SVlad Yasevich 6631da177e4SLinus Torvalds /* Is a socket of this style? */ 6641da177e4SLinus Torvalds #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style)) 6651da177e4SLinus Torvalds static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style) 6661da177e4SLinus Torvalds { 6671da177e4SLinus Torvalds return sctp_sk(sk)->type == style; 6681da177e4SLinus Torvalds } 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /* Is the association in this state? */ 6711da177e4SLinus Torvalds #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state)) 6721da177e4SLinus Torvalds static inline int __sctp_state(const struct sctp_association *asoc, 6731da177e4SLinus Torvalds sctp_state_t state) 6741da177e4SLinus Torvalds { 6751da177e4SLinus Torvalds return asoc->state == state; 6761da177e4SLinus Torvalds } 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds /* Is the socket in this state? */ 6791da177e4SLinus Torvalds #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state)) 6801da177e4SLinus Torvalds static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state) 6811da177e4SLinus Torvalds { 6821da177e4SLinus Torvalds return sk->sk_state == state; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /* Map v4-mapped v6 address back to v4 address */ 6861da177e4SLinus Torvalds static inline void sctp_v6_map_v4(union sctp_addr *addr) 6871da177e4SLinus Torvalds { 6881da177e4SLinus Torvalds addr->v4.sin_family = AF_INET; 6891da177e4SLinus Torvalds addr->v4.sin_port = addr->v6.sin6_port; 6901da177e4SLinus Torvalds addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3]; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds /* Map v4 address to v4-mapped v6 address */ 6941da177e4SLinus Torvalds static inline void sctp_v4_map_v6(union sctp_addr *addr) 6951da177e4SLinus Torvalds { 6961da177e4SLinus Torvalds addr->v6.sin6_family = AF_INET6; 6971da177e4SLinus Torvalds addr->v6.sin6_port = addr->v4.sin_port; 6981da177e4SLinus Torvalds addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr; 6991da177e4SLinus Torvalds addr->v6.sin6_addr.s6_addr32[0] = 0; 7001da177e4SLinus Torvalds addr->v6.sin6_addr.s6_addr32[1] = 0; 7011da177e4SLinus Torvalds addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff); 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds #endif /* __net_sctp_h__ */ 705