diff options
Diffstat (limited to 'include/net/sctp/sctp.h')
| -rw-r--r-- | include/net/sctp/sctp.h | 147 |
1 files changed, 95 insertions, 52 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index 1d13ec3f2707..58242b37b47a 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* SCTP kernel implementation * (C) Copyright IBM Corp. 2001, 2004 * Copyright (c) 1999-2000 Cisco, Inc. @@ -8,22 +9,6 @@ * * The base lksctp header. * - * This SCTP implementation is free software; - * you can redistribute it and/or modify it under the terms of - * the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This SCTP implementation is distributed in the hope that it - * will be useful, but WITHOUT ANY WARRANTY; without even the implied - * ************************ - * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * See the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU CC; see the file COPYING. If not, see - * <http://www.gnu.org/licenses/>. - * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers <linux-sctp@vger.kernel.org> @@ -43,7 +28,7 @@ #define __net_sctp_h__ /* Header Strategy. - * Start getting some control over the header file depencies: + * Start getting some control over the header file dependencies: * includes * constants * structs @@ -82,11 +67,6 @@ #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT #endif -/* Round an int up to the next multiple of 4. */ -#define SCTP_PAD4(s) (((s)+3)&~3) -/* Truncate to the previous multiple of 4. */ -#define SCTP_TRUNC4(s) ((s)&~3) - /* * Function declarations. */ @@ -99,11 +79,13 @@ int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *addr, struct sctp_pf *sctp_get_pf_specific(sa_family_t family); int sctp_register_pf(struct sctp_pf *, sa_family_t); void sctp_addr_wq_mgmt(struct net *, struct sctp_sockaddr_entry *, int); +int sctp_udp_sock_start(struct net *net); +void sctp_udp_sock_stop(struct net *net); /* * sctp/socket.c */ -int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr, +int sctp_inet_connect(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len, int flags); int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb); int sctp_inet_listen(struct socket *sock, int backlog); @@ -112,25 +94,23 @@ void sctp_data_ready(struct sock *sk); __poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait); void sctp_sock_rfree(struct sk_buff *skb); -void sctp_copy_sock(struct sock *newsk, struct sock *sk, - struct sctp_association *asoc); + extern struct percpu_counter sctp_sockets_allocated; int sctp_asconf_mgmt(struct sctp_sock *, struct sctp_sockaddr_entry *); -struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *); +struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int *); +typedef int (*sctp_callback_t)(struct sctp_endpoint *, struct sctp_transport *, void *); void sctp_transport_walk_start(struct rhashtable_iter *iter); void sctp_transport_walk_stop(struct rhashtable_iter *iter); struct sctp_transport *sctp_transport_get_next(struct net *net, struct rhashtable_iter *iter); struct sctp_transport *sctp_transport_get_idx(struct net *net, struct rhashtable_iter *iter, int pos); -int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *), - struct net *net, +int sctp_transport_lookup_process(sctp_callback_t cb, struct net *net, const union sctp_addr *laddr, - const union sctp_addr *paddr, void *p); -int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *), - int (*cb_done)(struct sctp_transport *, void *), - struct net *net, int *pos, void *p); + const union sctp_addr *paddr, void *p, int dif); +int sctp_transport_traverse_process(sctp_callback_t cb, sctp_callback_t cb_done, + struct net *net, int *pos, void *p); int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *), void *p); int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc, struct sctp_info *info); @@ -158,6 +138,8 @@ struct sock *sctp_err_lookup(struct net *net, int family, struct sk_buff *, struct sctphdr *, struct sctp_association **, struct sctp_transport **); void sctp_err_finish(struct sock *, struct sctp_transport *); +int sctp_udp_v4_err(struct sock *sk, struct sk_buff *skb); +int sctp_udp_v6_err(struct sock *sk, struct sk_buff *skb); void sctp_icmp_frag_needed(struct sock *, struct sctp_association *, struct sctp_transport *t, __u32 pmtu); void sctp_icmp_redirect(struct sock *, struct sctp_transport *, @@ -165,8 +147,6 @@ void sctp_icmp_redirect(struct sock *, struct sctp_transport *, void sctp_icmp_proto_unreachable(struct sock *sk, struct sctp_association *asoc, struct sctp_transport *t); -void sctp_backlog_migrate(struct sctp_association *assoc, - struct sock *oldsk, struct sock *newsk); int sctp_transport_hashtable_init(void); void sctp_transport_hashtable_destroy(void); int sctp_hash_transport(struct sctp_transport *t); @@ -174,10 +154,12 @@ void sctp_unhash_transport(struct sctp_transport *t); struct sctp_transport *sctp_addrs_lookup_transport( struct net *net, const union sctp_addr *laddr, - const union sctp_addr *paddr); + const union sctp_addr *paddr, + int dif, int sdif); struct sctp_transport *sctp_epaddr_lookup_transport( const struct sctp_endpoint *ep, const union sctp_addr *paddr); +bool sctp_sk_bound_dev_eq(struct net *net, int bound_dev_if, int dif, int sdif); /* * sctp/proc.c @@ -306,7 +288,7 @@ 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 +/* Macro to help create new entries in the global array of * objcnt counters. */ #define SCTP_DBG_OBJCNT_ENTRY(name) \ @@ -381,8 +363,6 @@ sctp_assoc_to_state(const struct sctp_association *asoc) /* Look up the association by its id. */ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id); -int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp); - /* A macro to walk a list of skbs. */ #define sctp_skb_for_each(pos, head, tmp) \ skb_queue_walk_safe(head, pos, tmp) @@ -421,13 +401,13 @@ static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk) /* * This mimics the behavior of skb_set_owner_r */ - sk->sk_forward_alloc -= event->rmem_len; + sk_mem_charge(sk, event->rmem_len); } /* Tests if the list has one and only one entry. */ static inline int sctp_list_single_entry(struct list_head *head) { - return (head->next != head) && (head->next == head->prev); + return list_is_singular(head); } static inline bool sctp_chunk_pending(const struct sctp_chunk *chunk) @@ -440,11 +420,11 @@ static inline bool sctp_chunk_pending(const struct sctp_chunk *chunk) * the chunk length to indicate when to stop. Make sure * there is room for a param header too. */ -#define sctp_walk_params(pos, chunk, member)\ -_sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member) +#define sctp_walk_params(pos, chunk)\ +_sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length)) -#define _sctp_walk_params(pos, chunk, end, member)\ -for (pos.v = chunk->member;\ +#define _sctp_walk_params(pos, chunk, end)\ +for (pos.v = (u8 *)(chunk + 1);\ (pos.v + offsetof(struct sctp_paramhdr, length) + sizeof(pos.p->length) <=\ (void *)chunk + end) &&\ pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\ @@ -467,8 +447,8 @@ for (err = (struct sctp_errhdr *)((void *)chunk_hdr + \ _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);\ +for (pos = (void *)(chunk->subh.fwdtsn_hdr + 1);\ + (void *)pos <= (void *)(chunk->subh.fwdtsn_hdr + 1) + end - sizeof(struct sctp_fwdtsn_skip);\ pos++) /* External references. */ @@ -521,8 +501,8 @@ static inline int sctp_ep_hashfn(struct net *net, __u16 lport) return (net_hash_mix(net) + lport) & (sctp_ep_hashsize - 1); } -#define sctp_for_each_hentry(epb, head) \ - hlist_for_each_entry(epb, head, node) +#define sctp_for_each_hentry(ep, head) \ + hlist_for_each_entry(ep, head, node) /* Is a socket of this style? */ #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style)) @@ -586,15 +566,19 @@ static inline struct dst_entry *sctp_transport_dst_check(struct sctp_transport * /* Calculate max payload size given a MTU, or the total overhead if * given MTU is zero */ -static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, - __u32 mtu, __u32 extra) +static inline __u32 __sctp_mtu_payload(const struct sctp_sock *sp, + const struct sctp_transport *t, + __u32 mtu, __u32 extra) { __u32 overhead = sizeof(struct sctphdr) + extra; - if (sp) + if (sp) { overhead += sp->pf->af->net_header_len; - else + if (sp->udp_port && (!t || t->encap_port)) + overhead += sizeof(struct udphdr); + } else { overhead += sizeof(struct ipv6hdr); + } if (WARN_ON_ONCE(mtu && mtu <= overhead)) mtu = overhead; @@ -602,6 +586,12 @@ static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, return mtu ? mtu - overhead : overhead; } +static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, + __u32 mtu, __u32 extra) +{ + return __sctp_mtu_payload(sp, NULL, mtu, extra); +} + static inline __u32 sctp_dst_mtu(const struct dst_entry *dst) { return SCTP_TRUNC4(max_t(__u32, dst_mtu(dst), @@ -625,4 +615,57 @@ static inline __u32 sctp_min_frag_point(struct sctp_sock *sp, __u16 datasize) return sctp_mtu_payload(sp, SCTP_DEFAULT_MINSEGMENT, datasize); } +static inline int sctp_transport_pl_hlen(struct sctp_transport *t) +{ + return __sctp_mtu_payload(sctp_sk(t->asoc->base.sk), t, 0, 0) - + sizeof(struct sctphdr); +} + +static inline void sctp_transport_pl_reset(struct sctp_transport *t) +{ + if (t->probe_interval && (t->param_flags & SPP_PMTUD_ENABLE) && + (t->state == SCTP_ACTIVE || t->state == SCTP_UNKNOWN)) { + if (t->pl.state == SCTP_PL_DISABLED) { + t->pl.state = SCTP_PL_BASE; + t->pl.pmtu = SCTP_BASE_PLPMTU; + t->pl.probe_size = SCTP_BASE_PLPMTU; + sctp_transport_reset_probe_timer(t); + } + } else { + if (t->pl.state != SCTP_PL_DISABLED) { + if (timer_delete(&t->probe_timer)) + sctp_transport_put(t); + t->pl.state = SCTP_PL_DISABLED; + } + } +} + +static inline void sctp_transport_pl_update(struct sctp_transport *t) +{ + if (t->pl.state == SCTP_PL_DISABLED) + return; + + t->pl.state = SCTP_PL_BASE; + t->pl.pmtu = SCTP_BASE_PLPMTU; + t->pl.probe_size = SCTP_BASE_PLPMTU; + sctp_transport_reset_probe_timer(t); +} + +static inline bool sctp_transport_pl_enabled(struct sctp_transport *t) +{ + return t->pl.state != SCTP_PL_DISABLED; +} + +static inline bool sctp_newsk_ready(const struct sock *sk) +{ + return sock_flag(sk, SOCK_DEAD) || sk->sk_socket; +} + +static inline void sctp_sock_set_nodelay(struct sock *sk) +{ + lock_sock(sk); + sctp_sk(sk)->nodelay = true; + release_sock(sk); +} + #endif /* __net_sctp_h__ */ |