forked from paypal/gatt
/
const.go
153 lines (138 loc) · 6.05 KB
/
const.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
package gatt
// This file includes constants from the BLE spec.
var (
attrGAPUUID = UUID16(0x1800)
attrGATTUUID = UUID16(0x1801)
attrPrimaryServiceUUID = UUID16(0x2800)
attrSecondaryServiceUUID = UUID16(0x2801)
attrIncludeUUID = UUID16(0x2802)
attrCharacteristicUUID = UUID16(0x2803)
attrClientCharacteristicConfigUUID = UUID16(0x2902)
attrServerCharacteristicConfigUUID = UUID16(0x2903)
attrDeviceNameUUID = UUID16(0x2A00)
attrAppearanceUUID = UUID16(0x2A01)
attrPeripheralPrivacyUUID = UUID16(0x2A02)
attrReconnectionAddrUUID = UUID16(0x2A03)
attrPeferredParamsUUID = UUID16(0x2A04)
attrServiceChangedUUID = UUID16(0x2A05)
)
const (
gattCCCNotifyFlag = 0x0001
gattCCCIndicateFlag = 0x0002
)
const (
attOpError = 0x01
attOpMtuReq = 0x02
attOpMtuRsp = 0x03
attOpFindInfoReq = 0x04
attOpFindInfoRsp = 0x05
attOpFindByTypeValueReq = 0x06
attOpFindByTypeValueRsp = 0x07
attOpReadByTypeReq = 0x08
attOpReadByTypeRsp = 0x09
attOpReadReq = 0x0a
attOpReadRsp = 0x0b
attOpReadBlobReq = 0x0c
attOpReadBlobRsp = 0x0d
attOpReadMultiReq = 0x0e
attOpReadMultiRsp = 0x0f
attOpReadByGroupReq = 0x10
attOpReadByGroupRsp = 0x11
attOpWriteReq = 0x12
attOpWriteRsp = 0x13
attOpWriteCmd = 0x52
attOpPrepWriteReq = 0x16
attOpPrepWriteRsp = 0x17
attOpExecWriteReq = 0x18
attOpExecWriteRsp = 0x19
attOpHandleNotify = 0x1b
attOpHandleInd = 0x1d
attOpHandleCnf = 0x1e
attOpSignedWriteCmd = 0xd2
)
type attEcode byte
const (
attEcodeSuccess attEcode = 0x00 // Success
attEcodeInvalidHandle attEcode = 0x01 // The attribute handle given was not valid on this server.
attEcodeReadNotPerm attEcode = 0x02 // The attribute cannot be read.
attEcodeWriteNotPerm attEcode = 0x03 // The attribute cannot be written.
attEcodeInvalidPDU attEcode = 0x04 // The attribute PDU was invalid.
attEcodeAuthentication attEcode = 0x05 // The attribute requires authentication before it can be read or written.
attEcodeReqNotSupp attEcode = 0x06 // Attribute server does not support the request received from the client.
attEcodeInvalidOffset attEcode = 0x07 // Offset specified was past the end of the attribute.
attEcodeAuthorization attEcode = 0x08 // The attribute requires authorization before it can be read or written.
attEcodePrepQueueFull attEcode = 0x09 // Too many prepare writes have been queued.
attEcodeAttrNotFound attEcode = 0x0a // No attribute found within the given attribute handle range.
attEcodeAttrNotLong attEcode = 0x0b // The attribute cannot be read or written using the Read Blob Request.
attEcodeInsuffEncrKeySize attEcode = 0x0c // The Encryption Key Size used for encrypting this link is insufficient.
attEcodeInvalAttrValueLen attEcode = 0x0d // The attribute value length is invalid for the operation.
attEcodeUnlikely attEcode = 0x0e // The attribute request that was requested has encountered an error that was unlikely, and therefore could not be completed as requested.
attEcodeInsuffEnc attEcode = 0x0f // The attribute requires encryption before it can be read or written.
attEcodeUnsuppGrpType attEcode = 0x10 // The attribute type is not a supported grouping attribute as defined by a higher layer specification.
attEcodeInsuffResources attEcode = 0x11 // Insufficient Resources to complete the request.
)
func (a attEcode) Error() string {
switch i := int(a); {
case i < 0x11:
return attEcodeName[a]
case i >= 0x12 && i <= 0x7F: // Reserved for future use
return "reserved error code"
case i >= 0x80 && i <= 0x9F: // Application Error, defined by higher level
return "reserved error code"
case i >= 0xA0 && i <= 0xDF: // Reserved for future use
return "reserved error code"
case i >= 0xE0 && i <= 0xFF: // Common profile and service error codes
return "profile or service error"
default: // can't happen, just make compiler happy
return "unkown error"
}
}
var attEcodeName = map[attEcode]string{
attEcodeSuccess: "success",
attEcodeInvalidHandle: "invalid handle",
attEcodeReadNotPerm: "read not permitted",
attEcodeWriteNotPerm: "write not permitted",
attEcodeInvalidPDU: "invalid PDU",
attEcodeAuthentication: "insufficient authentication",
attEcodeReqNotSupp: "request not supported",
attEcodeInvalidOffset: "invalid offset",
attEcodeAuthorization: "insufficient authorization",
attEcodePrepQueueFull: "prepare queue full",
attEcodeAttrNotFound: "attribute not found",
attEcodeAttrNotLong: "attribute not long",
attEcodeInsuffEncrKeySize: "insufficient encryption key size",
attEcodeInvalAttrValueLen: "invalid attribute value length",
attEcodeUnlikely: "unlikely error",
attEcodeInsuffEnc: "insufficient encryption",
attEcodeUnsuppGrpType: "unsupported group type",
attEcodeInsuffResources: "insufficient resources",
}
func attErrorRsp(op byte, h uint16, s attEcode) []byte {
return attErr{opcode: op, attr: h, status: s}.Marshal()
}
// attRspFor maps from att request
// codes to att response codes.
var attRspFor = map[byte]byte{
attOpMtuReq: attOpMtuRsp,
attOpFindInfoReq: attOpFindInfoRsp,
attOpFindByTypeValueReq: attOpFindByTypeValueRsp,
attOpReadByTypeReq: attOpReadByTypeRsp,
attOpReadReq: attOpReadRsp,
attOpReadBlobReq: attOpReadBlobRsp,
attOpReadMultiReq: attOpReadMultiRsp,
attOpReadByGroupReq: attOpReadByGroupRsp,
attOpWriteReq: attOpWriteRsp,
attOpPrepWriteReq: attOpPrepWriteRsp,
attOpExecWriteReq: attOpExecWriteRsp,
}
type attErr struct {
opcode uint8
attr uint16
status attEcode
}
// TODO: Reformulate in a way that lets the caller avoid allocs.
// Accept a []byte? Write directly to an io.Writer?
func (e attErr) Marshal() []byte {
// little-endian encoding for attr
return []byte{attOpError, e.opcode, byte(e.attr), byte(e.attr >> 8), byte(e.status)}
}