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