include/linux/phonet.h

   1 /**
   2  * file phonet.h
   3  *
   4  * Phonet sockets kernel interface
   5  *
   6  * Copyright (C) 2008 Nokia Corporation. All rights reserved.
   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 LINUX_PHONET_H
  24 #define LINUX_PHONET_H
  25
  26 #include <linux/types.h>
  27
  28 /* Automatic protocol selection */
  29 #define PN_PROTO_TRANSPORT      0
  30 /* Phonet datagram socket */
  31 #define PN_PROTO_PHONET         1
  32 /* Phonet pipe */
  33 #define PN_PROTO_PIPE           2
  34 #define PHONET_NPROTO           3
  35
  36 /* Socket options for SOL_PNPIPE level */
  37 #define PNPIPE_ENCAP            1
  38 #define PNPIPE_IFINDEX          2
  39
  40 #define PNADDR_ANY              0
  41 #define PNPORT_RESOURCE_ROUTING 0
  42
  43 /* Values for PNPIPE_ENCAP option */
  44 #define PNPIPE_ENCAP_NONE       0
  45 #define PNPIPE_ENCAP_IP         1
  46
  47 /* ioctls */
  48 #define SIOCPNGETOBJECT         (SIOCPROTOPRIVATE + 0)
  49
  50 /* Phonet protocol header */
  51 struct phonethdr {
  52         __u8    pn_rdev;
  53         __u8    pn_sdev;
  54         __u8    pn_res;
  55         __be16  pn_length;
  56         __u8    pn_robj;
  57         __u8    pn_sobj;
  58 } __attribute__((packed));
  59
  60 /* Common Phonet payload header */
  61 struct phonetmsg {
  62         __u8    pn_trans_id;    /* transaction ID */
  63         __u8    pn_msg_id;      /* message type */
  64         union {
  65                 struct {
  66                         __u8    pn_submsg_id;   /* message subtype */
  67                         __u8    pn_data[5];
  68                 } base;
  69                 struct {
  70                         __u16   pn_e_res_id;    /* extended resource ID */
  71                         __u8    pn_e_submsg_id; /* message subtype */
  72                         __u8    pn_e_data[3];
  73                 } ext;
  74         } pn_msg_u;
  75 };
  76 #define PN_COMMON_MESSAGE       0xF0
  77 #define PN_COMMGR               0x10
  78 #define PN_PREFIX               0xE0 /* resource for extended messages */
  79 #define pn_submsg_id            pn_msg_u.base.pn_submsg_id
  80 #define pn_e_submsg_id          pn_msg_u.ext.pn_e_submsg_id
  81 #define pn_e_res_id             pn_msg_u.ext.pn_e_res_id
  82 #define pn_data                 pn_msg_u.base.pn_data
  83 #define pn_e_data               pn_msg_u.ext.pn_e_data
  84
  85 /* data for unreachable errors */
  86 #define PN_COMM_SERVICE_NOT_IDENTIFIED_RESP     0x01
  87 #define PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP   0x14
  88 #define pn_orig_msg_id          pn_data[0]
  89 #define pn_status               pn_data[1]
  90 #define pn_e_orig_msg_id        pn_e_data[0]
  91 #define pn_e_status             pn_e_data[1]
  92
  93 /* Phonet socket address structure */
  94 struct sockaddr_pn {
  95         sa_family_t spn_family;
  96         __u8 spn_obj;
  97         __u8 spn_dev;
  98         __u8 spn_resource;
  99         __u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3];
 100 } __attribute__ ((packed));
 101
 102 static inline __u16 pn_object(__u8 addr, __u16 port)
 103 {
 104         return (addr << 8) | (port & 0x3ff);
 105 }
 106
 107 static inline __u8 pn_obj(__u16 handle)
 108 {
 109         return handle & 0xff;
 110 }
 111
 112 static inline __u8 pn_dev(__u16 handle)
 113 {
 114         return handle >> 8;
 115 }
 116
 117 static inline __u16 pn_port(__u16 handle)
 118 {
 119         return handle & 0x3ff;
 120 }
 121
 122 static inline __u8 pn_addr(__u16 handle)
 123 {
 124         return (handle >> 8) & 0xfc;
 125 }
 126
 127 static inline void pn_sockaddr_set_addr(struct sockaddr_pn *spn, __u8 addr)
 128 {
 129         spn->spn_dev &= 0x03;
 130         spn->spn_dev |= addr & 0xfc;
 131 }
 132
 133 static inline void pn_sockaddr_set_port(struct sockaddr_pn *spn, __u16 port)
 134 {
 135         spn->spn_dev &= 0xfc;
 136         spn->spn_dev |= (port >> 8) & 0x03;
 137         spn->spn_obj = port & 0xff;
 138 }
 139
 140 static inline void pn_sockaddr_set_object(struct sockaddr_pn *spn,
 141                                                 __u16 handle)
 142 {
 143         spn->spn_dev = pn_dev(handle);
 144         spn->spn_obj = pn_obj(handle);
 145 }
 146
 147 static inline void pn_sockaddr_set_resource(struct sockaddr_pn *spn,
 148                                                 __u8 resource)
 149 {
 150         spn->spn_resource = resource;
 151 }
 152
 153 static inline __u8 pn_sockaddr_get_addr(const struct sockaddr_pn *spn)
 154 {
 155         return spn->spn_dev & 0xfc;
 156 }
 157
 158 static inline __u16 pn_sockaddr_get_port(const struct sockaddr_pn *spn)
 159 {
 160         return ((spn->spn_dev & 0x03) << 8) | spn->spn_obj;
 161 }
 162
 163 static inline __u16 pn_sockaddr_get_object(const struct sockaddr_pn *spn)
 164 {
 165         return pn_object(spn->spn_dev, spn->spn_obj);
 166 }
 167
 168 static inline __u8 pn_sockaddr_get_resource(const struct sockaddr_pn *spn)
 169 {
 170         return spn->spn_resource;
 171 }
 172
 173 #endif