include/net/phonet/pep.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * File: pep.h
   4  *
   5  * Phonet Pipe End Point sockets definitions
   6  *
   7  * Copyright (C) 2008 Nokia Corporation.
   8  */
   9
  10 #ifndef NET_PHONET_PEP_H
  11 #define NET_PHONET_PEP_H
  12
  13 struct pep_sock {
  14         struct pn_sock          pn_sk;
  15
  16         /* XXX: union-ify listening vs connected stuff ? */
  17         /* Listening socket stuff: */
  18         struct hlist_head       hlist;
  19
  20         /* Connected socket stuff: */
  21         struct sock             *listener;
  22         struct sk_buff_head     ctrlreq_queue;
  23 #define PNPIPE_CTRLREQ_MAX      10
  24         atomic_t                tx_credits;
  25         int                     ifindex;
  26         u16                     peer_type;      /* peer type/subtype */
  27         u8                      pipe_handle;
  28
  29         u8                      rx_credits;
  30         u8                      rx_fc;  /* RX flow control */
  31         u8                      tx_fc;  /* TX flow control */
  32         u8                      init_enable;    /* auto-enable at creation */
  33         u8                      aligned;
  34 };
  35
  36 static inline struct pep_sock *pep_sk(struct sock *sk)
  37 {
  38         return (struct pep_sock *)sk;
  39 }
  40
  41 extern const struct proto_ops phonet_stream_ops;
  42
  43 /* Pipe protocol definitions */
  44 struct pnpipehdr {
  45         u8                      utid; /* transaction ID */
  46         u8                      message_id;
  47         u8                      pipe_handle;
  48         union {
  49                 u8              state_after_connect;    /* connect request */
  50                 u8              state_after_reset;      /* reset request */
  51                 u8              error_code;             /* any response */
  52                 u8              pep_type;               /* status indication */
  53                 u8              data0;                  /* anything else */
  54         };
  55         u8                      data[];
  56 };
  57 #define other_pep_type          data[0]
  58
  59 static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
  60 {
  61         return (struct pnpipehdr *)skb_transport_header(skb);
  62 }
  63
  64 #define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
  65
  66 enum {
  67         PNS_PIPE_CREATE_REQ = 0x00,
  68         PNS_PIPE_CREATE_RESP,
  69         PNS_PIPE_REMOVE_REQ,
  70         PNS_PIPE_REMOVE_RESP,
  71
  72         PNS_PIPE_DATA = 0x20,
  73         PNS_PIPE_ALIGNED_DATA,
  74
  75         PNS_PEP_CONNECT_REQ = 0x40,
  76         PNS_PEP_CONNECT_RESP,
  77         PNS_PEP_DISCONNECT_REQ,
  78         PNS_PEP_DISCONNECT_RESP,
  79         PNS_PEP_RESET_REQ,
  80         PNS_PEP_RESET_RESP,
  81         PNS_PEP_ENABLE_REQ,
  82         PNS_PEP_ENABLE_RESP,
  83         PNS_PEP_CTRL_REQ,
  84         PNS_PEP_CTRL_RESP,
  85         PNS_PEP_DISABLE_REQ = 0x4C,
  86         PNS_PEP_DISABLE_RESP,
  87
  88         PNS_PEP_STATUS_IND = 0x60,
  89         PNS_PIPE_CREATED_IND,
  90         PNS_PIPE_RESET_IND = 0x63,
  91         PNS_PIPE_ENABLED_IND,
  92         PNS_PIPE_REDIRECTED_IND,
  93         PNS_PIPE_DISABLED_IND = 0x66,
  94 };
  95
  96 #define PN_PIPE_INVALID_HANDLE  0xff
  97 #define PN_PEP_TYPE_COMMON      0x00
  98
  99 /* Phonet pipe status indication */
 100 enum {
 101         PN_PEP_IND_FLOW_CONTROL,
 102         PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
 103 };
 104
 105 /* Phonet pipe error codes */
 106 enum {
 107         PN_PIPE_NO_ERROR,
 108         PN_PIPE_ERR_INVALID_PARAM,
 109         PN_PIPE_ERR_INVALID_HANDLE,
 110         PN_PIPE_ERR_INVALID_CTRL_ID,
 111         PN_PIPE_ERR_NOT_ALLOWED,
 112         PN_PIPE_ERR_PEP_IN_USE,
 113         PN_PIPE_ERR_OVERLOAD,
 114         PN_PIPE_ERR_DEV_DISCONNECTED,
 115         PN_PIPE_ERR_TIMEOUT,
 116         PN_PIPE_ERR_ALL_PIPES_IN_USE,
 117         PN_PIPE_ERR_GENERAL,
 118         PN_PIPE_ERR_NOT_SUPPORTED,
 119 };
 120
 121 /* Phonet pipe states */
 122 enum {
 123         PN_PIPE_DISABLE,
 124         PN_PIPE_ENABLE,
 125 };
 126
 127 /* Phonet pipe sub-block types */
 128 enum {
 129         PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
 130         PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
 131         PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
 132         PN_PIPE_SB_NEGOTIATED_FC,
 133         PN_PIPE_SB_REQUIRED_FC_TX,
 134         PN_PIPE_SB_PREFERRED_FC_RX,
 135         PN_PIPE_SB_ALIGNED_DATA,
 136 };
 137
 138 /* Phonet pipe flow control models */
 139 enum {
 140         PN_NO_FLOW_CONTROL,
 141         PN_LEGACY_FLOW_CONTROL,
 142         PN_ONE_CREDIT_FLOW_CONTROL,
 143         PN_MULTI_CREDIT_FLOW_CONTROL,
 144         PN_MAX_FLOW_CONTROL,
 145 };
 146
 147 #define pn_flow_safe(fc) ((fc) >> 1)
 148
 149 /* Phonet pipe flow control states */
 150 enum {
 151         PEP_IND_EMPTY,
 152         PEP_IND_BUSY,
 153         PEP_IND_READY,
 154 };
 155
 156 #endif