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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 <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 */
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
66 struct af_iucv_trans_hdr {
67 u16 magic;
68 u8 version;
69 u8 flags;
70 u16 window;
71 char destNodeID[8];
72 char destUserID[8];
73 char destAppName[16];
74 char srcNodeID[8];
75 char srcUserID[8];
76 char srcAppName[16]; /* => 70 bytes */
77 struct iucv_message iucv_hdr; /* => 33 bytes */
78 u8 pad; /* total 104 bytes */
79 } __packed;
80
81 enum iucv_tx_notify {
82 /* transmission of skb is completed and was successful */
83 TX_NOTIFY_OK = 0,
84 /* target is unreachable */
85 TX_NOTIFY_UNREACHABLE = 1,
86 /* transfer pending queue full */
87 TX_NOTIFY_TPQFULL = 2,
88 /* general error */
89 TX_NOTIFY_GENERALERROR = 3,
90 /* transmission of skb is pending - may interleave
91 * with TX_NOTIFY_DELAYED_* */
92 TX_NOTIFY_PENDING = 4,
93 /* transmission of skb was done successfully (delayed) */
94 TX_NOTIFY_DELAYED_OK = 5,
95 /* target unreachable (detected delayed) */
96 TX_NOTIFY_DELAYED_UNREACHABLE = 6,
97 /* general error (detected delayed) */
98 TX_NOTIFY_DELAYED_GENERALERROR = 7,
99 };
100
101 #define iucv_sk(__sk) ((struct iucv_sock *) __sk)
102
103 #define AF_IUCV_TRANS_IUCV 0
104 #define AF_IUCV_TRANS_HIPER 1
105
106 struct iucv_sock {
107 struct sock sk;
108 char src_user_id[8];
109 char src_name[8];
110 char dst_user_id[8];
111 char dst_name[8];
112 struct list_head accept_q;
113 spinlock_t accept_q_lock;
114 struct sock *parent;
115 struct iucv_path *path;
116 struct net_device *hs_dev;
117 struct sk_buff_head send_skb_q;
118 struct sk_buff_head backlog_skb_q;
119 struct sock_msg_q message_q;
120 unsigned int send_tag;
121 u8 flags;
122 u16 msglimit;
123 u16 msglimit_peer;
124 atomic_t msg_sent;
125 atomic_t msg_recv;
126 atomic_t pendings;
127 int transport;
128 void (*sk_txnotify)(struct sk_buff *skb,
129 enum iucv_tx_notify n);
130 };
131
132 /* iucv socket options (SOL_IUCV) */
133 #define SO_IPRMDATA_MSG 0x0080 /* send/recv IPRM_DATA msgs */
134 #define SO_MSGLIMIT 0x1000 /* get/set IUCV MSGLIMIT */
135
136 /* iucv related control messages (scm) */
137 #define SCM_IUCV_TRGCLS 0x0001 /* target class control message */
138
139 struct iucv_sock_list {
140 struct hlist_head head;
141 rwlock_t lock;
142 atomic_t autobind_name;
143 };
144
145 unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
146 poll_table *wait);
147 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
148 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
149 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
150 void iucv_accept_unlink(struct sock *sk);
151 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
152
153 #endif /* __IUCV_H */