LXR linux/include/net/phonet/pep.h

   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
  26struct 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        struct sk_buff_head     ctrlreq_queue;
  37#define PNPIPE_CTRLREQ_MAX      10
  38        atomic_t                tx_credits;
  39        int                     ifindex;
  40        u16                     peer_type;      /* peer type/subtype */
  41        u8                      pipe_handle;
  42
  43        u8                      rx_credits;
  44        u8                      rx_fc;  /* RX flow control */
  45        u8                      tx_fc;  /* TX flow control */
  46        u8                      init_enable;    /* auto-enable at creation */
  47};
  48
  49static inline struct pep_sock *pep_sk(struct sock *sk)
  50{
  51        return (struct pep_sock *)sk;
  52}
  53
  54extern const struct proto_ops phonet_stream_ops;
  55
  56/* Pipe protocol definitions */
  57struct pnpipehdr {
  58        u8                      utid; /* transaction ID */
  59        u8                      message_id;
  60        u8                      pipe_handle;
  61        union {
  62                u8              state_after_connect;    /* connect request */
  63                u8              state_after_reset;      /* reset request */
  64                u8              error_code;             /* any response */
  65                u8              pep_type;               /* status indication */
  66                u8              data[1];
  67        };
  68};
  69#define other_pep_type          data[1]
  70
  71static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb)
  72{
  73        return (struct pnpipehdr *)skb_transport_header(skb);
  74}
  75
  76#define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4)
  77
  78enum {
  79        PNS_PIPE_DATA = 0x20,
  80
  81        PNS_PEP_CONNECT_REQ = 0x40,
  82        PNS_PEP_CONNECT_RESP,
  83        PNS_PEP_DISCONNECT_REQ,
  84        PNS_PEP_DISCONNECT_RESP,
  85        PNS_PEP_RESET_REQ,
  86        PNS_PEP_RESET_RESP,
  87        PNS_PEP_ENABLE_REQ,
  88        PNS_PEP_ENABLE_RESP,
  89        PNS_PEP_CTRL_REQ,
  90        PNS_PEP_CTRL_RESP,
  91        PNS_PEP_DISABLE_REQ = 0x4C,
  92        PNS_PEP_DISABLE_RESP,
  93
  94        PNS_PEP_STATUS_IND = 0x60,
  95        PNS_PIPE_CREATED_IND,
  96        PNS_PIPE_RESET_IND = 0x63,
  97        PNS_PIPE_ENABLED_IND,
  98        PNS_PIPE_REDIRECTED_IND,
  99        PNS_PIPE_DISABLED_IND = 0x66,
 100};
 101
 102#define PN_PIPE_INVALID_HANDLE  0xff
 103#define PN_PEP_TYPE_COMMON      0x00
 104
 105/* Phonet pipe status indication */
 106enum {
 107        PN_PEP_IND_FLOW_CONTROL,
 108        PN_PEP_IND_ID_MCFC_GRANT_CREDITS,
 109};
 110
 111/* Phonet pipe error codes */
 112enum {
 113        PN_PIPE_NO_ERROR,
 114        PN_PIPE_ERR_INVALID_PARAM,
 115        PN_PIPE_ERR_INVALID_HANDLE,
 116        PN_PIPE_ERR_INVALID_CTRL_ID,
 117        PN_PIPE_ERR_NOT_ALLOWED,
 118        PN_PIPE_ERR_PEP_IN_USE,
 119        PN_PIPE_ERR_OVERLOAD,
 120        PN_PIPE_ERR_DEV_DISCONNECTED,
 121        PN_PIPE_ERR_TIMEOUT,
 122        PN_PIPE_ERR_ALL_PIPES_IN_USE,
 123        PN_PIPE_ERR_GENERAL,
 124        PN_PIPE_ERR_NOT_SUPPORTED,
 125};
 126
 127/* Phonet pipe states */
 128enum {
 129        PN_PIPE_DISABLE,
 130        PN_PIPE_ENABLE,
 131};
 132
 133/* Phonet pipe sub-block types */
 134enum {
 135        PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE,
 136        PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE,
 137        PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE,
 138        PN_PIPE_SB_NEGOTIATED_FC,
 139        PN_PIPE_SB_REQUIRED_FC_TX,
 140        PN_PIPE_SB_PREFERRED_FC_RX,
 141};
 142
 143/* Phonet pipe flow control models */
 144enum {
 145        PN_NO_FLOW_CONTROL,
 146        PN_LEGACY_FLOW_CONTROL,
 147        PN_ONE_CREDIT_FLOW_CONTROL,
 148        PN_MULTI_CREDIT_FLOW_CONTROL,
 149};
 150
 151#define pn_flow_safe(fc) ((fc) >> 1)
 152
 153/* Phonet pipe flow control states */
 154enum {
 155        PEP_IND_EMPTY,
 156        PEP_IND_BUSY,
 157        PEP_IND_READY,
 158};
 159
 160#endif
 161