^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * (C) Copyright IBM Corp. 2001, 2004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 1999-2000 Cisco, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 1999-2001 Motorola, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (c) 2001-2003 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * This file is part of the SCTP kernel implementation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * The base lksctp header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Please send any bug reports or fixes you make to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * email address(es):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * lksctp developers <linux-sctp@vger.kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Written or modified by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * La Monte H.P. Yarroll <piggy@acm.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Xingang Guo <xingang.guo@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Jon Grimm <jgrimm@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Daisy Chang <daisyc@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * Sridhar Samudrala <sri@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Ardelle Fan <ardelle.fan@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Ryan Layer <rmlayer@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Kevin Gao <kevin.gao@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifndef __net_sctp_h__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define __net_sctp_h__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* Header Strategy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Start getting some control over the header file depencies:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * includes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * constants
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * structs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * prototypes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * macros, externs, and inlines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Move test_frame specific items out of the kernel headers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * and into the test frame headers. This is not perfect in any sense
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * and will continue to evolve.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <linux/in.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #include <linux/idr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <net/ipv6.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <net/ip6_route.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #include <net/snmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <net/sctp/structs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <net/sctp/constants.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #ifdef CONFIG_IP_SCTP_MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define SCTP_PROTOSW_FLAG 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #else /* static! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Round an int up to the next multiple of 4. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define SCTP_PAD4(s) (((s)+3)&~3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Truncate to the previous multiple of 4. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define SCTP_TRUNC4(s) ((s)&~3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * Function declarations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * sctp/protocol.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) enum sctp_scope, gfp_t gfp, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct sctp_pf *sctp_get_pf_specific(sa_family_t family);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int sctp_register_pf(struct sctp_pf *, sa_family_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) void sctp_addr_wq_mgmt(struct net *, struct sctp_sockaddr_entry *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * sctp/socket.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) int addr_len, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int sctp_inet_listen(struct socket *sock, int backlog);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) void sctp_write_space(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) void sctp_data_ready(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) __poll_t sctp_poll(struct file *file, struct socket *sock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) poll_table *wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) void sctp_sock_rfree(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) void sctp_copy_sock(struct sock *newsk, struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct sctp_association *asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) extern struct percpu_counter sctp_sockets_allocated;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int sctp_asconf_mgmt(struct sctp_sock *, struct sctp_sockaddr_entry *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) typedef int (*sctp_callback_t)(struct sctp_endpoint *, struct sctp_transport *, void *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) void sctp_transport_walk_start(struct rhashtable_iter *iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) void sctp_transport_walk_stop(struct rhashtable_iter *iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct sctp_transport *sctp_transport_get_next(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct rhashtable_iter *iter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct sctp_transport *sctp_transport_get_idx(struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct rhashtable_iter *iter, int pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) const union sctp_addr *laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) const union sctp_addr *paddr, void *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct net *net, int *pos, void *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), void *p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct sctp_info *info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * sctp/primitive.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int sctp_primitive_ASSOCIATE(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int sctp_primitive_SHUTDOWN(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) int sctp_primitive_ABORT(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) int sctp_primitive_SEND(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) int sctp_primitive_REQUESTHEARTBEAT(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int sctp_primitive_ASCONF(struct net *, struct sctp_association *, void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int sctp_primitive_RECONF(struct net *net, struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) void *arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * sctp/input.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int sctp_rcv(struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int sctp_v4_err(struct sk_buff *skb, u32 info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) int sctp_hash_endpoint(struct sctp_endpoint *ep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) void sctp_unhash_endpoint(struct sctp_endpoint *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) struct sock *sctp_err_lookup(struct net *net, int family, struct sk_buff *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) struct sctphdr *, struct sctp_association **,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct sctp_transport **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) void sctp_err_finish(struct sock *, struct sctp_transport *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) void sctp_icmp_frag_needed(struct sock *, struct sctp_association *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct sctp_transport *t, __u32 pmtu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) void sctp_icmp_redirect(struct sock *, struct sctp_transport *,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct sk_buff *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) void sctp_icmp_proto_unreachable(struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct sctp_transport *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) void sctp_backlog_migrate(struct sctp_association *assoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct sock *oldsk, struct sock *newsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int sctp_transport_hashtable_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) void sctp_transport_hashtable_destroy(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int sctp_hash_transport(struct sctp_transport *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) void sctp_unhash_transport(struct sctp_transport *t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct sctp_transport *sctp_addrs_lookup_transport(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct net *net,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) const union sctp_addr *laddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) const union sctp_addr *paddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct sctp_transport *sctp_epaddr_lookup_transport(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) const struct sctp_endpoint *ep,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) const union sctp_addr *paddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * sctp/proc.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) int __net_init sctp_proc_init(struct net *net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * sctp/offload.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int sctp_offload_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * sctp/stream_sched.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) void sctp_sched_ops_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) * sctp/stream.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) int sctp_send_reset_streams(struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct sctp_reset_streams *params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int sctp_send_reset_assoc(struct sctp_association *asoc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) int sctp_send_add_streams(struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct sctp_add_streams *params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * Module global variables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * sctp/protocol.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) extern struct kmem_cache *sctp_chunk_cachep __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) extern struct kmem_cache *sctp_bucket_cachep __read_mostly;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) extern long sysctl_sctp_mem[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) extern int sysctl_sctp_rmem[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) extern int sysctl_sctp_wmem[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * Section: Macros, externs, and inlines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* SCTP SNMP MIB stats handlers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #define SCTP_INC_STATS(net, field) SNMP_INC_STATS((net)->sctp.sctp_statistics, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) #define __SCTP_INC_STATS(net, field) __SNMP_INC_STATS((net)->sctp.sctp_statistics, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) #define SCTP_DEC_STATS(net, field) SNMP_DEC_STATS((net)->sctp.sctp_statistics, field)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* sctp mib definitions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) SCTP_MIB_NUM = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) SCTP_MIB_CURRESTAB, /* CurrEstab */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) SCTP_MIB_ACTIVEESTABS, /* ActiveEstabs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) SCTP_MIB_PASSIVEESTABS, /* PassiveEstabs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) SCTP_MIB_ABORTEDS, /* Aborteds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) SCTP_MIB_SHUTDOWNS, /* Shutdowns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) SCTP_MIB_OUTOFBLUES, /* OutOfBlues */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) SCTP_MIB_CHECKSUMERRORS, /* ChecksumErrors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) SCTP_MIB_OUTCTRLCHUNKS, /* OutCtrlChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) SCTP_MIB_OUTORDERCHUNKS, /* OutOrderChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) SCTP_MIB_OUTUNORDERCHUNKS, /* OutUnorderChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) SCTP_MIB_INCTRLCHUNKS, /* InCtrlChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) SCTP_MIB_INORDERCHUNKS, /* InOrderChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) SCTP_MIB_INUNORDERCHUNKS, /* InUnorderChunks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) SCTP_MIB_FRAGUSRMSGS, /* FragUsrMsgs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) SCTP_MIB_REASMUSRMSGS, /* ReasmUsrMsgs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) SCTP_MIB_OUTSCTPPACKS, /* OutSCTPPacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) SCTP_MIB_INSCTPPACKS, /* InSCTPPacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) SCTP_MIB_T1_INIT_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) SCTP_MIB_T1_COOKIE_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) SCTP_MIB_T2_SHUTDOWN_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) SCTP_MIB_T3_RTX_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) SCTP_MIB_T4_RTO_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) SCTP_MIB_DELAY_SACK_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) SCTP_MIB_AUTOCLOSE_EXPIREDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) SCTP_MIB_T1_RETRANSMITS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) SCTP_MIB_T3_RETRANSMITS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) SCTP_MIB_PMTUD_RETRANSMITS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) SCTP_MIB_FAST_RETRANSMITS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) SCTP_MIB_IN_PKT_SOFTIRQ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) SCTP_MIB_IN_PKT_BACKLOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) SCTP_MIB_IN_PKT_DISCARDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) SCTP_MIB_IN_DATA_CHUNK_DISCARDS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) __SCTP_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) #define SCTP_MIB_MAX __SCTP_MIB_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct sctp_mib {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) unsigned long mibs[SCTP_MIB_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) /* helper function to track stats about max rto and related transport */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static inline void sctp_max_rto(struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct sctp_transport *trans)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (asoc->stats.max_obs_rto < (__u64)trans->rto) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) asoc->stats.max_obs_rto = trans->rto;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) memset(&asoc->stats.obs_rto_ipaddr, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) sizeof(struct sockaddr_storage));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) memcpy(&asoc->stats.obs_rto_ipaddr, &trans->ipaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) trans->af_specific->sockaddr_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * Macros for keeping a global reference of object allocations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #ifdef CONFIG_SCTP_DBG_OBJCNT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) extern atomic_t sctp_dbg_objcnt_sock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) extern atomic_t sctp_dbg_objcnt_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) extern atomic_t sctp_dbg_objcnt_assoc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) extern atomic_t sctp_dbg_objcnt_transport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) extern atomic_t sctp_dbg_objcnt_chunk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) extern atomic_t sctp_dbg_objcnt_bind_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) extern atomic_t sctp_dbg_objcnt_bind_bucket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) extern atomic_t sctp_dbg_objcnt_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) extern atomic_t sctp_dbg_objcnt_datamsg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) extern atomic_t sctp_dbg_objcnt_keys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* Macros to atomically increment/decrement objcnt counters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) #define SCTP_DBG_OBJCNT_INC(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) atomic_inc(&sctp_dbg_objcnt_## name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) #define SCTP_DBG_OBJCNT_DEC(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) atomic_dec(&sctp_dbg_objcnt_## name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) #define SCTP_DBG_OBJCNT(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /* Macro to help create new entries in the global array of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * objcnt counters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) #define SCTP_DBG_OBJCNT_ENTRY(name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {.label= #name, .counter= &sctp_dbg_objcnt_## name}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) void sctp_dbg_objcnt_init(struct net *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) #define SCTP_DBG_OBJCNT_INC(name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #define SCTP_DBG_OBJCNT_DEC(name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static inline void sctp_dbg_objcnt_init(struct net *net) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #endif /* CONFIG_SCTP_DBG_OBJCOUNT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) #if defined CONFIG_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) void sctp_sysctl_register(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) void sctp_sysctl_unregister(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) int sctp_sysctl_net_register(struct net *net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) void sctp_sysctl_net_unregister(struct net *net);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static inline void sctp_sysctl_register(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static inline void sctp_sysctl_unregister(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static inline int sctp_sysctl_net_register(struct net *net) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static inline void sctp_sysctl_net_unregister(struct net *net) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) /* Size of Supported Address Parameter for 'x' address types. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) #if IS_ENABLED(CONFIG_IPV6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) void sctp_v6_pf_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) void sctp_v6_pf_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) int sctp_v6_protosw_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) void sctp_v6_protosw_exit(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) int sctp_v6_add_protocol(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) void sctp_v6_del_protocol(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) #else /* #ifdef defined(CONFIG_IPV6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) static inline void sctp_v6_pf_init(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static inline void sctp_v6_pf_exit(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static inline int sctp_v6_protosw_init(void) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static inline void sctp_v6_protosw_exit(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static inline int sctp_v6_add_protocol(void) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static inline void sctp_v6_del_protocol(void) { return; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) #endif /* #if defined(CONFIG_IPV6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) /* Map an association to an assoc_id. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return asoc ? asoc->assoc_id : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static inline enum sctp_sstat_state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) sctp_assoc_to_state(const struct sctp_association *asoc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /* SCTP's uapi always had SCTP_EMPTY(=0) as a dummy state, but we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * got rid of it in kernel space. Therefore SCTP_CLOSED et al
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * start at =1 in user space, but actually as =0 in kernel space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * Now that we can not break user space and SCTP_EMPTY is exposed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * there, we need to fix it up with an ugly offset not to break
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * applications. :(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return asoc->state + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) /* Look up the association by its id. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* A macro to walk a list of skbs. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) #define sctp_skb_for_each(pos, head, tmp) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) skb_queue_walk_safe(head, pos, tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * sctp_list_dequeue - remove from the head of the queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * @list: list to dequeue from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * Remove the head of the list. The head item is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * returned or %NULL if the list is empty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) static inline struct list_head *sctp_list_dequeue(struct list_head *list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) struct list_head *result = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (!list_empty(list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) result = list->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) list_del_init(result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /* SCTP version of skb_set_owner_r. We need this one because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) * of the way we have to do receive buffer accounting on bundled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * chunks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) struct sctp_ulpevent *event = sctp_skb2event(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) skb_orphan(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) skb->sk = sk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) skb->destructor = sctp_sock_rfree;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) atomic_add(event->rmem_len, &sk->sk_rmem_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * This mimics the behavior of skb_set_owner_r
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) sk_mem_charge(sk, event->rmem_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /* Tests if the list has one and only one entry. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) static inline int sctp_list_single_entry(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) return list_is_singular(head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) static inline bool sctp_chunk_pending(const struct sctp_chunk *chunk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) return !list_empty(&chunk->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* Walk through a list of TLV parameters. Don't trust the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * individual parameter lengths and instead depend on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * the chunk length to indicate when to stop. Make sure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * there is room for a param header too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) #define sctp_walk_params(pos, chunk, member)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) _sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) #define _sctp_walk_params(pos, chunk, end, member)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) for (pos.v = chunk->member;\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) (pos.v + offsetof(struct sctp_paramhdr, length) + sizeof(pos.p->length) <=\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) (void *)chunk + end) &&\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) ntohs(pos.p->length) >= sizeof(struct sctp_paramhdr);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) pos.v += SCTP_PAD4(ntohs(pos.p->length)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) #define sctp_walk_errors(err, chunk_hdr)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) #define _sctp_walk_errors(err, chunk_hdr, end)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) for (err = (struct sctp_errhdr *)((void *)chunk_hdr + \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) sizeof(struct sctp_chunkhdr));\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) ((void *)err + offsetof(struct sctp_errhdr, length) + sizeof(err->length) <=\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) (void *)chunk_hdr + end) &&\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) ntohs(err->length) >= sizeof(struct sctp_errhdr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) err = (struct sctp_errhdr *)((void *)err + SCTP_PAD4(ntohs(err->length))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) #define sctp_walk_fwdtsn(pos, chunk)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) #define _sctp_walk_fwdtsn(pos, chunk, end)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) for (pos = chunk->subh.fwdtsn_hdr->skip;\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) pos++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* External references. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) extern struct proto sctp_prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) extern struct proto sctpv6_prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) void sctp_put_port(struct sock *sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) extern struct idr sctp_assocs_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) extern spinlock_t sctp_assocs_id_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /* Static inline functions. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* Convert from an IP version number to an Address Family symbol. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static inline int ipver2af(__u8 ipver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) switch (ipver) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) case 6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) /* Convert from an address parameter type to an address family. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) static inline int param_type2af(__be16 type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) case SCTP_PARAM_IPV4_ADDRESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) case SCTP_PARAM_IPV6_ADDRESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) return AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /* Warning: The following hash functions assume a power of two 'size'. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /* This is the hash function for the SCTP port hash table. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) static inline int sctp_phashfn(struct net *net, __u16 lport)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) return (net_hash_mix(net) + lport) & (sctp_port_hashsize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) /* This is the hash function for the endpoint hash table. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) static inline int sctp_ep_hashfn(struct net *net, __u16 lport)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) return (net_hash_mix(net) + lport) & (sctp_ep_hashsize - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) #define sctp_for_each_hentry(epb, head) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) hlist_for_each_entry(epb, head, node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) /* Is a socket of this style? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) static inline int __sctp_style(const struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) enum sctp_socket_type style)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return sctp_sk(sk)->type == style;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) /* Is the association in this state? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) static inline int __sctp_state(const struct sctp_association *asoc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) enum sctp_state state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return asoc->state == state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* Is the socket in this state? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) static inline int __sctp_sstate(const struct sock *sk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) enum sctp_sock_state state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return sk->sk_state == state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /* Map v4-mapped v6 address back to v4 address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) static inline void sctp_v6_map_v4(union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) addr->v4.sin_family = AF_INET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) addr->v4.sin_port = addr->v6.sin6_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) /* Map v4 address to v4-mapped v6 address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) static inline void sctp_v4_map_v6(union sctp_addr *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) __be16 port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) port = addr->v4.sin_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) addr->v6.sin6_port = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) addr->v6.sin6_family = AF_INET6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) addr->v6.sin6_flowinfo = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) addr->v6.sin6_scope_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) addr->v6.sin6_addr.s6_addr32[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) addr->v6.sin6_addr.s6_addr32[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) /* The cookie is always 0 since this is how it's used in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * pmtu code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static inline struct dst_entry *sctp_transport_dst_check(struct sctp_transport *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (t->dst && !dst_check(t->dst, t->dst_cookie))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) sctp_transport_dst_release(t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return t->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) /* Calculate max payload size given a MTU, or the total overhead if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) * given MTU is zero
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) __u32 mtu, __u32 extra)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) __u32 overhead = sizeof(struct sctphdr) + extra;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) overhead += sp->pf->af->net_header_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) overhead += sizeof(struct ipv6hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (WARN_ON_ONCE(mtu && mtu <= overhead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) mtu = overhead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return mtu ? mtu - overhead : overhead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) static inline __u32 sctp_dst_mtu(const struct dst_entry *dst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return SCTP_TRUNC4(max_t(__u32, dst_mtu(dst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) SCTP_DEFAULT_MINSEGMENT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) static inline bool sctp_transport_pmtu_check(struct sctp_transport *t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) __u32 pmtu = sctp_dst_mtu(t->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (t->pathmtu == pmtu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) t->pathmtu = pmtu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) static inline __u32 sctp_min_frag_point(struct sctp_sock *sp, __u16 datasize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return sctp_mtu_payload(sp, SCTP_DEFAULT_MINSEGMENT, datasize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) static inline bool sctp_newsk_ready(const struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return sock_flag(sk, SOCK_DEAD) || sk->sk_socket;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static inline void sctp_sock_set_nodelay(struct sock *sk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) lock_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) sctp_sk(sk)->nodelay = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) release_sock(sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) #endif /* __net_sctp_h__ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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