LXR linux/include/net/iucv/af

   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 */
  26enum {
  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 */
  44struct 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 */
  55struct 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
  68struct 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
  83static 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
  88enum 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
 113struct 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
 139struct 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
 155struct iucv_sock_list {
 156        struct hlist_head head;
 157        rwlock_t          lock;
 158        atomic_t          autobind_name;
 159};
 160
 161#endif /* __IUCV_H */
 162