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#include <net/iucv/iucv.h>
18
19#ifndef AF_IUCV
20#define AF_IUCV		32
21#define PF_IUCV		AF_IUCV
22#endif
23
24/* Connection and socket states */
25enum {
26	IUCV_CONNECTED = 1,
27	IUCV_OPEN,
28	IUCV_BOUND,
29	IUCV_LISTEN,
30	IUCV_DISCONN,
31	IUCV_CLOSING,
32	IUCV_CLOSED
33};
34
35#define IUCV_QUEUELEN_DEFAULT	65535
36#define IUCV_HIPER_MSGLIM_DEFAULT	128
37#define IUCV_CONN_TIMEOUT	(HZ * 40)
38#define IUCV_DISCONN_TIMEOUT	(HZ * 2)
39#define IUCV_CONN_IDLE_TIMEOUT	(HZ * 60)
40#define IUCV_BUFSIZE_DEFAULT	32768
41
42/* IUCV socket address */
43struct sockaddr_iucv {
44	sa_family_t	siucv_family;
45	unsigned short	siucv_port;		/* Reserved */
46	unsigned int	siucv_addr;		/* Reserved */
47	char		siucv_nodeid[8];	/* Reserved */
48	char		siucv_user_id[8];	/* Guest User Id */
49	char		siucv_name[8];		/* Application Name */
50};
51
52
53/* Common socket structures and functions */
54struct sock_msg_q {
55	struct iucv_path	*path;
56	struct iucv_message	msg;
57	struct list_head	list;
58	spinlock_t		lock;
59};
60
61#define AF_IUCV_FLAG_ACK 0x1
62#define AF_IUCV_FLAG_SYN 0x2
63#define AF_IUCV_FLAG_FIN 0x4
64#define AF_IUCV_FLAG_WIN 0x8
65#define AF_IUCV_FLAG_SHT 0x10
66
67struct af_iucv_trans_hdr {
68	u16 magic;
69	u8 version;
70	u8 flags;
71	u16 window;
72	char destNodeID[8];
73	char destUserID[8];
74	char destAppName[16];
75	char srcNodeID[8];
76	char srcUserID[8];
77	char srcAppName[16];             /* => 70 bytes */
78	struct iucv_message iucv_hdr;    /* => 33 bytes */
79	u8 pad;                          /* total 104 bytes */
80} __packed;
81
82enum iucv_tx_notify {
83	/* transmission of skb is completed and was successful */
84	TX_NOTIFY_OK = 0,
85	/* target is unreachable */
86	TX_NOTIFY_UNREACHABLE = 1,
87	/* transfer pending queue full */
88	TX_NOTIFY_TPQFULL = 2,
89	/* general error */
90	TX_NOTIFY_GENERALERROR = 3,
91	/* transmission of skb is pending - may interleave
92	 * with TX_NOTIFY_DELAYED_* */
93	TX_NOTIFY_PENDING = 4,
94	/* transmission of skb was done successfully (delayed) */
95	TX_NOTIFY_DELAYED_OK = 5,
96	/* target unreachable (detected delayed) */
97	TX_NOTIFY_DELAYED_UNREACHABLE = 6,
98	/* general error (detected delayed) */
99	TX_NOTIFY_DELAYED_GENERALERROR = 7,
100};
101
102#define iucv_sk(__sk) ((struct iucv_sock *) __sk)
103
104#define AF_IUCV_TRANS_IUCV 0
105#define AF_IUCV_TRANS_HIPER 1
106
107struct iucv_sock {
108	struct sock		sk;
109	char			src_user_id[8];
110	char			src_name[8];
111	char			dst_user_id[8];
112	char			dst_name[8];
113	struct list_head	accept_q;
114	spinlock_t		accept_q_lock;
115	struct sock		*parent;
116	struct iucv_path	*path;
117	struct net_device	*hs_dev;
118	struct sk_buff_head	send_skb_q;
119	struct sk_buff_head	backlog_skb_q;
120	struct sock_msg_q	message_q;
121	unsigned int		send_tag;
122	u8			flags;
123	u16			msglimit;
124	u16			msglimit_peer;
125	atomic_t		msg_sent;
126	atomic_t		msg_recv;
127	atomic_t		pendings;
128	int			transport;
129	void                    (*sk_txnotify)(struct sk_buff *skb,
130					       enum iucv_tx_notify n);
131};
132
133struct iucv_skb_cb {
134	u32	class;		/* target class of message */
135	u32	tag;		/* tag associated with message */
136	u32	offset;		/* offset for skb receival */
137};
138
139#define IUCV_SKB_CB(__skb)	((struct iucv_skb_cb *)&((__skb)->cb[0]))
140
141/* iucv socket options (SOL_IUCV) */
142#define SO_IPRMDATA_MSG	0x0080		/* send/recv IPRM_DATA msgs */
143#define SO_MSGLIMIT	0x1000		/* get/set IUCV MSGLIMIT */
144#define SO_MSGSIZE	0x0800		/* get maximum msgsize */
145
146/* iucv related control messages (scm) */
147#define SCM_IUCV_TRGCLS	0x0001		/* target class control message */
148
149struct iucv_sock_list {
150	struct hlist_head head;
151	rwlock_t	  lock;
152	atomic_t	  autobind_name;
153};
154
155unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
156			    poll_table *wait);
157void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
158void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
159void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
160void iucv_accept_unlink(struct sock *sk);
161struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
162
163#endif /* __IUCV_H */
164