include/net/iucv/af_iucv.h

   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 #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 struct 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
 149 struct iucv_sock_list {
 150         struct hlist_head head;
 151         rwlock_t          lock;
 152         atomic_t          autobind_name;
 153 };
 154
 155 unsigned int iucv_sock_poll(struct file *file, struct socket *sock,
 156                             poll_table *wait);
 157 void iucv_sock_link(struct iucv_sock_list *l, struct sock *s);
 158 void iucv_sock_unlink(struct iucv_sock_list *l, struct sock *s);
 159 void iucv_accept_enqueue(struct sock *parent, struct sock *sk);
 160 void iucv_accept_unlink(struct sock *sk);
 161 struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock);
 162
 163 #endif /* __IUCV_H */