86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
/*
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Copyright 2015 The GoStor Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package iscsit
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import "bytes"
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func (m *Message) loginRespBytes() []byte {
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// rfc7143 11.13
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buf := &bytes.Buffer{}
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// byte 0
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buf.WriteByte(byte(OpLoginResp))
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var b byte
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if m.Transit {
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b |= 0x80
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}
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if m.Cont {
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b |= 0x40
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}
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b |= byte(m.CSG&0xff) << 2
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b |= byte(m.NSG & 0xff)
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// byte 1
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buf.WriteByte(b)
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b = 0
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buf.WriteByte(b) // version-max
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buf.WriteByte(b) // version-active
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buf.WriteByte(b) // ahsLen
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buf.Write(MarshalUint64(uint64(len(m.RawData)))[5:]) // data segment length, no padding
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buf.Write(MarshalUint64(m.ISID)[2:])
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buf.Write(MarshalUint64(uint64(m.TSIH))[6:])
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buf.Write(MarshalUint64(uint64(m.TaskTag))[4:])
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buf.WriteByte(b)
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buf.WriteByte(b)
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buf.WriteByte(b)
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buf.WriteByte(b) // "reserved"
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buf.Write(MarshalUint64(uint64(m.StatSN))[4:])
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buf.Write(MarshalUint64(uint64(m.ExpCmdSN))[4:])
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buf.Write(MarshalUint64(uint64(m.MaxCmdSN))[4:])
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buf.WriteByte(byte(m.StatusClass))
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buf.WriteByte(byte(m.StatusDetail))
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buf.WriteByte(b)
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buf.WriteByte(b) // "reserved"
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var bs [8]byte
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buf.Write(bs[:])
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rd := m.RawData
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for len(rd)%4 != 0 {
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rd = append(rd, 0)
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}
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buf.Write(rd)
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return buf.Bytes()
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}
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type Stage int
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const (
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SecurityNegotiation Stage = 0
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LoginOperationalNegotiation = 1
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FullFeaturePhase = 3
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)
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func (s Stage) String() string {
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switch s {
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case SecurityNegotiation:
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return "Security Negotiation"
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case LoginOperationalNegotiation:
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return "Login Operational Negotiation"
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case FullFeaturePhase:
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return "Full Feature Phase"
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}
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return "Unknown Stage"
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}
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