1/*
2 * Copyright 2006 IBM Corporation
3 * IUCV protocol stack for Linux on zSeries
4 * Version 1.0
5 * Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
6 *
7 */
8
9#ifndef __AFIUCV_H
10#define __AFIUCV_H
11
12#include <asm/types.h>
13#include <asm/byteorder.h>
14#include <linux/list.h>
15#include <linux/poll.h>
16#include <linux/socket.h>
17
18#ifndef AF_IUCV
19#define AF_IUCV		32
20#define PF_IUCV		AF_IUCV
21#endif
22
23/* Connection and socket states */
24enum {
25	IUCV_CONNECTED = 1,
26	IUCV_OPEN,
27	IUCV_BOUND,
28	IUCV_LISTEN,
29	IUCV_SEVERED,
30	IUCV_DISCONN,
31	IUCV_CLOSING,
32	IUCV_CLOSED
33};
34
35#define IUCV_QUEUELEN_DEFAULT	65535
36#define IUCV_CONN_TIMEOUT	(HZ * 40)
37#define IUCV_DISCONN_TIMEOUT	(HZ * 2)
38#define IUCV_CONN_IDLE_TIMEOUT	(HZ * 60)
39#define IUCV_BUFSIZE_DEFAULT	32768
40
41/* IUCV socket address */
42struct sockaddr_iucv {
43	sa_family_t	siucv_family;
44	unsigned short	siucv_port;		/* Reserved */
45	unsigned int	siucv_addr;		/* Reserved */
46	char		siucv_nodeid[8];	/* Reserved */
47	char		siucv_user_id[8];	/* Guest User Id */
48	char		siucv_name[8];		/* Application Name */
49};
50
51
52/* Common socket structures and functions */
53
54#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
55
56struct iucv_sock {
57	struct sock		sk;
58	char			src_user_id[8];
59	char			src_name[8];
60	char			dst_user_id[8];
61	char			dst_name[8];
62	struct list_head	accept_q;
63	struct sock		*parent;
64	struct iucv_path	*path;
65	struct sk_buff_head	send_skb_q;
66	struct sk_buff_head	backlog_skb_q;
67	unsigned int		send_tag;
68};
69
70struct iucv_sock_list {
71	struct hlist_head head;
72	rwlock_t	  lock;
73	atomic_t	  autobind_name;
74};
75
76static void iucv_sock_destruct(struct sock *sk);
77static void iucv_sock_cleanup_listen(struct sock *parent);
78static void iucv_sock_kill(struct sock *sk);
79static void iucv_sock_close(struct sock *sk);
80static int  iucv_sock_create(struct socket *sock, int proto);
81static int  iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
82			int addr_len);
83static int  iucv_sock_connect(struct socket *sock, struct sockaddr *addr,
84			      int alen, int flags);
85static int  iucv_sock_listen(struct socket *sock, int backlog);
86static int  iucv_sock_accept(struct socket *sock, struct socket *newsock,
87			     int flags);
88static int  iucv_sock_getname(struct socket *sock, struct sockaddr *addr,
89			      int *len, int peer);
90static int  iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
91			      struct msghdr *msg, size_t len);
92static int  iucv_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
93			      struct msghdr *msg, size_t len, int flags);
94unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
95			    poll_table *wait);
96static int iucv_sock_release(struct socket *sock);
97static int iucv_sock_shutdown(struct socket *sock, int how);
98
99void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
100void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
101int  iucv_sock_wait_state(struct sock *sk, int state, int state2,
102			  unsigned long timeo);
103int  iucv_sock_wait_cnt(struct sock *sk, unsigned long timeo);
104void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
105void iucv_accept_unlink(struct sock *sk);
106struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
107
108#endif /* __IUCV_H */
109