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af_iucv.h
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1 /*
2  * Copyright 2006 IBM Corporation
3  * IUCV protocol stack for Linux on zSeries
4  * Version 1.0
5  * Author(s): Jennifer Hunt <[email protected]>
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 */
25 enum {
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 */
43 struct 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 */
54 struct 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 
67 struct 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 
82 enum 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 
107 struct 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 
133 /* iucv socket options (SOL_IUCV) */
134 #define SO_IPRMDATA_MSG 0x0080 /* send/recv IPRM_DATA msgs */
135 #define SO_MSGLIMIT 0x1000 /* get/set IUCV MSGLIMIT */
136 #define SO_MSGSIZE 0x0800 /* get maximum msgsize */
137 
138 /* iucv related control messages (scm) */
139 #define SCM_IUCV_TRGCLS 0x0001 /* target class control message */
140 
141 struct iucv_sock_list {
142  struct hlist_head head;
143  rwlock_t lock;
144  atomic_t autobind_name;
145 };
146 
147 unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
148  poll_table *wait);
149 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
150 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
151 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
152 void iucv_accept_unlink(struct sock *sk);
153 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
154 
155 #endif /* __IUCV_H */
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