diff options
Diffstat (limited to 'net/handshake/handshake.h')
-rw-r--r-- | net/handshake/handshake.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/net/handshake/handshake.h b/net/handshake/handshake.h new file mode 100644 index 0000000000..a48163765a --- /dev/null +++ b/net/handshake/handshake.h @@ -0,0 +1,93 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Generic netlink handshake service + * + * Author: Chuck Lever <chuck.lever@oracle.com> + * + * Copyright (c) 2023, Oracle and/or its affiliates. + */ + +#ifndef _INTERNAL_HANDSHAKE_H +#define _INTERNAL_HANDSHAKE_H + +/* Per-net namespace context */ +struct handshake_net { + spinlock_t hn_lock; /* protects next 3 fields */ + int hn_pending; + int hn_pending_max; + struct list_head hn_requests; + + unsigned long hn_flags; +}; + +enum hn_flags_bits { + HANDSHAKE_F_NET_DRAINING, +}; + +struct handshake_proto; + +/* One handshake request */ +struct handshake_req { + struct list_head hr_list; + struct rhash_head hr_rhash; + unsigned long hr_flags; + const struct handshake_proto *hr_proto; + struct sock *hr_sk; + void (*hr_odestruct)(struct sock *sk); + + /* Always the last field */ + char hr_priv[]; +}; + +enum hr_flags_bits { + HANDSHAKE_F_REQ_COMPLETED, + HANDSHAKE_F_REQ_SESSION, +}; + +struct genl_info; + +/* Invariants for all handshake requests for one transport layer + * security protocol + */ +struct handshake_proto { + int hp_handler_class; + size_t hp_privsize; + unsigned long hp_flags; + + int (*hp_accept)(struct handshake_req *req, + struct genl_info *info, int fd); + void (*hp_done)(struct handshake_req *req, + unsigned int status, + struct genl_info *info); + void (*hp_destroy)(struct handshake_req *req); +}; + +enum hp_flags_bits { + HANDSHAKE_F_PROTO_NOTIFY, +}; + +/* alert.c */ +int tls_alert_send(struct socket *sock, u8 level, u8 description); + +/* netlink.c */ +int handshake_genl_notify(struct net *net, const struct handshake_proto *proto, + gfp_t flags); +struct nlmsghdr *handshake_genl_put(struct sk_buff *msg, + struct genl_info *info); +struct handshake_net *handshake_pernet(struct net *net); + +/* request.c */ +struct handshake_req *handshake_req_alloc(const struct handshake_proto *proto, + gfp_t flags); +int handshake_req_hash_init(void); +void handshake_req_hash_destroy(void); +void *handshake_req_private(struct handshake_req *req); +struct handshake_req *handshake_req_hash_lookup(struct sock *sk); +struct handshake_req *handshake_req_next(struct handshake_net *hn, int class); +int handshake_req_submit(struct socket *sock, struct handshake_req *req, + gfp_t flags); +void handshake_complete(struct handshake_req *req, unsigned int status, + struct genl_info *info); +bool handshake_req_cancel(struct sock *sk); + +#endif /* _INTERNAL_HANDSHAKE_H */ |