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TOMOYO Linux Cross Reference
Linux/include/net/iucv/af_iucv.h

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  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 
 83 enum iucv_tx_notify {
 84         /* transmission of skb is completed and was successful */
 85         TX_NOTIFY_OK = 0,
 86         /* target is unreachable */
 87         TX_NOTIFY_UNREACHABLE = 1,
 88         /* transfer pending queue full */
 89         TX_NOTIFY_TPQFULL = 2,
 90         /* general error */
 91         TX_NOTIFY_GENERALERROR = 3,
 92         /* transmission of skb is pending - may interleave
 93          * with TX_NOTIFY_DELAYED_* */
 94         TX_NOTIFY_PENDING = 4,
 95         /* transmission of skb was done successfully (delayed) */
 96         TX_NOTIFY_DELAYED_OK = 5,
 97         /* target unreachable (detected delayed) */
 98         TX_NOTIFY_DELAYED_UNREACHABLE = 6,
 99         /* general error (detected delayed) */
100         TX_NOTIFY_DELAYED_GENERALERROR = 7,
101 };
102 
103 #define iucv_sk(__sk) ((struct iucv_sock *) __sk)
104 
105 #define AF_IUCV_TRANS_IUCV 0
106 #define AF_IUCV_TRANS_HIPER 1
107 
108 struct iucv_sock {
109         struct sock             sk;
110         char                    src_user_id[8];
111         char                    src_name[8];
112         char                    dst_user_id[8];
113         char                    dst_name[8];
114         struct list_head        accept_q;
115         spinlock_t              accept_q_lock;
116         struct sock             *parent;
117         struct iucv_path        *path;
118         struct net_device       *hs_dev;
119         struct sk_buff_head     send_skb_q;
120         struct sk_buff_head     backlog_skb_q;
121         struct sock_msg_q       message_q;
122         unsigned int            send_tag;
123         u8                      flags;
124         u16                     msglimit;
125         u16                     msglimit_peer;
126         atomic_t                msg_sent;
127         atomic_t                msg_recv;
128         atomic_t                pendings;
129         int                     transport;
130         void                    (*sk_txnotify)(struct sk_buff *skb,
131                                                enum iucv_tx_notify n);
132 };
133 
134 struct iucv_skb_cb {
135         u32     class;          /* target class of message */
136         u32     tag;            /* tag associated with message */
137         u32     offset;         /* offset for skb receival */
138 };
139 
140 #define IUCV_SKB_CB(__skb)      ((struct iucv_skb_cb *)&((__skb)->cb[0]))
141 
142 /* iucv socket options (SOL_IUCV) */
143 #define SO_IPRMDATA_MSG 0x0080          /* send/recv IPRM_DATA msgs */
144 #define SO_MSGLIMIT     0x1000          /* get/set IUCV MSGLIMIT */
145 #define SO_MSGSIZE      0x0800          /* get maximum msgsize */
146 
147 /* iucv related control messages (scm) */
148 #define SCM_IUCV_TRGCLS 0x0001          /* target class control message */
149 
150 struct iucv_sock_list {
151         struct hlist_head head;
152         rwlock_t          lock;
153         atomic_t          autobind_name;
154 };
155 
156 unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
157                             poll_table *wait);
158 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
159 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
160 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
161 void iucv_accept_unlink(struct sock *sk);
162 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
163 
164 #endif /* __IUCV_H */
165 

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