1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright 2006 IBM Corporation
4 * IUCV protocol stack for Linux on zSeries
5 * Version 1.0
6 * Author(s): Jennifer Hunt <jenhunt@us.ibm.com>
7 *
8 */
9
10 #ifndef __AFIUCV_H
11 #define __AFIUCV_H
12
13 #include <asm/types.h>
14 #include <asm/byteorder.h>
15 #include <linux/list.h>
16 #include <linux/poll.h>
17 #include <linux/socket.h>
18 #include <net/iucv/iucv.h>
19
20 #ifndef AF_IUCV
21 #define AF_IUCV 32
22 #define PF_IUCV AF_IUCV
23 #endif
24
25 /* Connection and socket states */
26 enum {
27 IUCV_CONNECTED = 1,
28 IUCV_OPEN,
29 IUCV_BOUND,
30 IUCV_LISTEN,
31 IUCV_DISCONN,
32 IUCV_CLOSING,
33 IUCV_CLOSED
34 };
35
36 #define IUCV_QUEUELEN_DEFAULT 65535
37 #define IUCV_HIPER_MSGLIM_DEFAULT 128
38 #define IUCV_CONN_TIMEOUT (HZ * 40)
39 #define IUCV_DISCONN_TIMEOUT (HZ * 2)
40 #define IUCV_CONN_IDLE_TIMEOUT (HZ * 60)
41 #define IUCV_BUFSIZE_DEFAULT 32768
42
43 /* IUCV socket address */
44 struct sockaddr_iucv {
45 sa_family_t siucv_family;
46 unsigned short siucv_port; /* Reserved */
47 unsigned int siucv_addr; /* Reserved */
48 char siucv_nodeid[8]; /* Reserved */
49 char siucv_user_id[8]; /* Guest User Id */
50 char siucv_name[8]; /* Application Name */
51 };
52
53
54 /* Common socket structures and functions */
55 struct sock_msg_q {
56 struct iucv_path *path;
57 struct iucv_message msg;
58 struct list_head list;
59 spinlock_t lock;
60 };
61
62 #define AF_IUCV_FLAG_ACK 0x1
63 #define AF_IUCV_FLAG_SYN 0x2
64 #define AF_IUCV_FLAG_FIN 0x4
65 #define AF_IUCV_FLAG_WIN 0x8
66 #define AF_IUCV_FLAG_SHT 0x10
67
68 struct af_iucv_trans_hdr {
69 u16 magic;
70 u8 version;
71 u8 flags;
72 u16 window;
73 char destNodeID[8];
74 char destUserID[8];
75 char destAppName[16];
76 char srcNodeID[8];
77 char srcUserID[8];
78 char srcAppName[16]; /* => 70 bytes */
79 struct iucv_message iucv_hdr; /* => 33 bytes */
80 u8 pad; /* total 104 bytes */
81 } __packed;
82
iucv_trans_hdr(struct sk_buff * skb)83 static inline struct af_iucv_trans_hdr *iucv_trans_hdr(struct sk_buff *skb)
84 {
85 return (struct af_iucv_trans_hdr *)skb_network_header(skb);
86 }
87
88 enum iucv_tx_notify {
89 /* transmission of skb is completed and was successful */
90 TX_NOTIFY_OK = 0,
91 /* target is unreachable */
92 TX_NOTIFY_UNREACHABLE = 1,
93 /* transfer pending queue full */
94 TX_NOTIFY_TPQFULL = 2,
95 /* general error */
96 TX_NOTIFY_GENERALERROR = 3,
97 /* transmission of skb is pending - may interleave
98 * with TX_NOTIFY_DELAYED_* */
99 TX_NOTIFY_PENDING = 4,
100 /* transmission of skb was done successfully (delayed) */
101 TX_NOTIFY_DELAYED_OK = 5,
102 /* target unreachable (detected delayed) */
103 TX_NOTIFY_DELAYED_UNREACHABLE = 6,
104 /* general error (detected delayed) */
105 TX_NOTIFY_DELAYED_GENERALERROR = 7,
106 };
107
108 #define iucv_sk(__sk) ((struct iucv_sock *) __sk)
109
110 #define AF_IUCV_TRANS_IUCV 0
111 #define AF_IUCV_TRANS_HIPER 1
112
113 struct iucv_sock {
114 struct sock sk;
115 char src_user_id[8];
116 char src_name[8];
117 char dst_user_id[8];
118 char dst_name[8];
119 struct list_head accept_q;
120 spinlock_t accept_q_lock;
121 struct sock *parent;
122 struct iucv_path *path;
123 struct net_device *hs_dev;
124 struct sk_buff_head send_skb_q;
125 struct sk_buff_head backlog_skb_q;
126 struct sock_msg_q message_q;
127 unsigned int send_tag;
128 u8 flags;
129 u16 msglimit;
130 u16 msglimit_peer;
131 atomic_t msg_sent;
132 atomic_t msg_recv;
133 atomic_t pendings;
134 int transport;
135 void (*sk_txnotify)(struct sk_buff *skb,
136 enum iucv_tx_notify n);
137 };
138
139 struct iucv_skb_cb {
140 u32 class; /* target class of message */
141 u32 tag; /* tag associated with message */
142 u32 offset; /* offset for skb receival */
143 };
144
145 #define IUCV_SKB_CB(__skb) ((struct iucv_skb_cb *)&((__skb)->cb[0]))
146
147 /* iucv socket options (SOL_IUCV) */
148 #define SO_IPRMDATA_MSG 0x0080 /* send/recv IPRM_DATA msgs */
149 #define SO_MSGLIMIT 0x1000 /* get/set IUCV MSGLIMIT */
150 #define SO_MSGSIZE 0x0800 /* get maximum msgsize */
151
152 /* iucv related control messages (scm) */
153 #define SCM_IUCV_TRGCLS 0x0001 /* target class control message */
154
155 struct iucv_sock_list {
156 struct hlist_head head;
157 rwlock_t lock;
158 atomic_t autobind_name;
159 };
160
161 __poll_t iucv_sock_poll(struct file *file, struct socket *sock,
162 poll_table *wait);
163 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
164 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
165 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
166 void iucv_accept_unlink(struct sock *sk);
167 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
168
169 #endif /* __IUCV_H */
170
