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   1 /*
   2  * File: pep.h
   3  *
   4  * Phonet Pipe End Point sockets definitions
   5  *
   6  * Copyright (C) 2008 Nokia Corporation.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  */
  22
  23 #ifndef NET_PHONET_PEP_H
  24 #define NET_PHONET_PEP_H
  25
  26 struct pep_sock {
  27         struct pn_sock          pn_sk;
  28
  29         /* XXX: union-ify listening vs connected stuff ? */
  30         /* Listening socket stuff: */
  31         struct hlist_head       ackq;
  32         struct hlist_head       hlist;
  33
  34         /* Connected socket stuff: */
  35         struct sock             *listener;
  36         u16                     peer_type;      /* peer type/subtype */
  37         u8                      pipe_handle;
  38
  39         u8                      rx_credits;
  40         u8                      tx_credits;
  41         u8                      rx_fc;  /* RX flow control */
  42         u8                      tx_fc;  /* TX flow control */
  43         u8                      init_enable;    /* auto-enable at creation */
  44 };
  45
  46 static inline struct pep_sock *pep_sk(struct sock *sk)
  47 {
  48         return (struct pep_sock *)sk;
  49 }
  50
  51 extern const struct proto_ops phonet_stream_ops;
  52
  53 /* Pipe protocol definitions */
  54 struct pnpipehdr {
  55         u8                      utid; /* transaction ID */
  56         u8                      message_id;
  57         u8                      pipe_handle;
  58         union {
  59                 u8              state_after_connect;    /* connect request */
  60                 u8              state_after_reset;      /* reset request */
  61                 u8              error_code;             /* any response */
  62                 u8              pep_type;               /* status indication */
  63                 u8              data[1];
  64         };
  65 };
  66 #define other_pep_type          data[1]
  67
  68 static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
  69 {
  70         return (struct pnpipehdr *)skb_transport_header(skb);
  71 }
  72
  73 #define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
  74
  75 enum {
  76         PNS_PIPE_DATA = 0x20,
  77
  78         PNS_PEP_CONNECT_REQ = 0x40,
  79         PNS_PEP_CONNECT_RESP,
  80         PNS_PEP_DISCONNECT_REQ,
  81         PNS_PEP_DISCONNECT_RESP,
  82         PNS_PEP_RESET_REQ,
  83         PNS_PEP_RESET_RESP,
  84         PNS_PEP_ENABLE_REQ,
  85         PNS_PEP_ENABLE_RESP,
  86         PNS_PEP_CTRL_REQ,
  87         PNS_PEP_CTRL_RESP,
  88         PNS_PEP_DISABLE_REQ = 0x4C,
  89         PNS_PEP_DISABLE_RESP,
  90
  91         PNS_PEP_STATUS_IND = 0x60,
  92         PNS_PIPE_CREATED_IND,
  93         PNS_PIPE_RESET_IND = 0x63,
  94         PNS_PIPE_ENABLED_IND,
  95         PNS_PIPE_REDIRECTED_IND,
  96         PNS_PIPE_DISABLED_IND = 0x66,
  97 };
  98
  99 #define PN_PIPE_INVALID_HANDLE  0xff
 100 #define PN_PEP_TYPE_COMMON      0x00
 101
 102 /* Phonet pipe status indication */
 103 enum {
 104         PN_PEP_IND_FLOW_CONTROL,
 105         PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
 106 };
 107
 108 /* Phonet pipe error codes */
 109 enum {
 110         PN_PIPE_NO_ERROR,
 111         PN_PIPE_ERR_INVALID_PARAM,
 112         PN_PIPE_ERR_INVALID_HANDLE,
 113         PN_PIPE_ERR_INVALID_CTRL_ID,
 114         PN_PIPE_ERR_NOT_ALLOWED,
 115         PN_PIPE_ERR_PEP_IN_USE,
 116         PN_PIPE_ERR_OVERLOAD,
 117         PN_PIPE_ERR_DEV_DISCONNECTED,
 118         PN_PIPE_ERR_TIMEOUT,
 119         PN_PIPE_ERR_ALL_PIPES_IN_USE,
 120         PN_PIPE_ERR_GENERAL,
 121         PN_PIPE_ERR_NOT_SUPPORTED,
 122 };
 123
 124 /* Phonet pipe states */
 125 enum {
 126         PN_PIPE_DISABLE,
 127         PN_PIPE_ENABLE,
 128 };
 129
 130 /* Phonet pipe sub-block types */
 131 enum {
 132         PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
 133         PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
 134         PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
 135         PN_PIPE_SB_NEGOTIATED_FC,
 136         PN_PIPE_SB_REQUIRED_FC_TX,
 137         PN_PIPE_SB_PREFERRED_FC_RX,
 138 };
 139
 140 /* Phonet pipe flow control models */
 141 enum {
 142         PN_NO_FLOW_CONTROL,
 143         PN_LEGACY_FLOW_CONTROL,
 144         PN_ONE_CREDIT_FLOW_CONTROL,
 145         PN_MULTI_CREDIT_FLOW_CONTROL,
 146 };
 147
 148 #define pn_flow_safe(fc) ((fc) >> 1)
 149
 150 /* Phonet pipe flow control states */
 151 enum {
 152         PEP_IND_EMPTY,
 153         PEP_IND_BUSY,
 154         PEP_IND_READY,
 155 };
 156
 157 #endif