Add files

README.md

@@ -1 +1,56 @@
-# ipmigo
+ipmigo
+======
+
+**Work In Progress**
+
+ipmigo is a golang implementation for IPMI client.
+
+Supported Version
+-----------------
+
+* IPMI v2.0(lanplus)
+
+Examples
+--------
+
+```go
+package main
+
+import (
+    "fmt"
+
+    "github.com/k-sone/ipmigo"
+)
+
+func main() {
+    c, err := ipmigo.NewClient(ipmigo.Arguments{
+        Version:       ipmigo.V2_0,
+        Address:       "192.168.1.1:623",
+        Username:      "myuser",
+        Password:      "mypass",
+        CipherSuiteID: 3,
+    })
+    if err != nil {
+        fmt.Println(err)
+        return
+    }
+
+    if err := c.Open(); err != nil {
+        fmt.Println(err)
+        return
+    }
+    defer c.Close()
+
+    cmd := &ipmigo.GetPOHCounterCommand{}
+    if err := c.Execute(cmd); err != nil {
+        fmt.Println(err)
+        return
+    }
+    fmt.Println("Power On Hours", cmd.PowerOnHours())
+}
+```
+
+License
+-------
+
+MIT

asf.go

@@ -0,0 +1,170 @@
+package ipmigo
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"net"
+	"time"
+)
+
+const (
+	asfHeaderSize = 8
+	pongBodySize  = 16
+	asfIANA       = 0x000011be
+)
+
+type asfType uint8
+
+const (
+	asfTypePing = 0x80
+	asfTypePong = 0x40
+)
+
+func (t asfType) String() string {
+	switch t {
+	case asfTypePing:
+		return "Ping"
+	case asfTypePong:
+		return "Pong"
+	default:
+		return fmt.Sprintf("Unknown(%d)", t)
+	}
+}
+
+type asfHeader struct {
+	IANA     uint32
+	Type     asfType
+	Tag      uint8
+	Reserved uint8
+	Length   uint8
+}
+
+func (a *asfHeader) Marshal() ([]byte, error) {
+	buf := make([]byte, asfHeaderSize)
+	binary.BigEndian.PutUint32(buf, a.IANA)
+	buf[4] = byte(a.Type)
+	buf[5] = a.Tag
+	buf[6] = a.Reserved
+	buf[7] = a.Length
+	return buf, nil
+}
+
+func (a *asfHeader) Unmarshal(buf []byte) ([]byte, error) {
+	if len(buf) < asfHeaderSize {
+		return nil, &MessageError{
+			Message: fmt.Sprintf("Invalid ASF header size : %d", len(buf)),
+			Detail:  hex.EncodeToString(buf),
+		}
+	}
+
+	a.IANA = binary.BigEndian.Uint32(buf)
+	a.Type = asfType(buf[4])
+	a.Tag = buf[5]
+	a.Reserved = buf[6]
+	a.Length = buf[7]
+
+	return buf[8:], nil
+}
+
+func (a *asfHeader) String() string {
+	return fmt.Sprintf(
+		`{"IANA":%d,"Type":"%s","Tag":%d,"Reserved":%d,"Length":%d}`,
+		a.IANA, a.Type, a.Tag, a.Reserved, a.Length)
+}
+
+// RMCP/ASF Ping Message (Section 13.2.3)
+type pingMessage struct {
+	RMCPHeader *rmcpHeader
+	ASFHeader  *asfHeader
+}
+
+func (p *pingMessage) Marshal() ([]byte, error) {
+	buf1, err := p.RMCPHeader.Marshal()
+	if err != nil {
+		return nil, err
+	}
+	buf2, err := p.ASFHeader.Marshal()
+	if err != nil {
+		return nil, err
+	}
+	return append(buf1, buf2...), nil
+}
+
+func (p *pingMessage) String() string {
+	return fmt.Sprintf(`{"RMCPHeader":%s,"ASFHeader":%s}`, p.RMCPHeader, p.ASFHeader)
+}
+
+func newPingMessage() *pingMessage {
+	return &pingMessage{
+		RMCPHeader: &rmcpHeader{
+			Version:  rmcpVersion1,
+			Sequence: rmcpNoAckSeq,
+			Class:    rmcpClassASF,
+		},
+		ASFHeader: &asfHeader{
+			IANA: asfIANA,
+			Type: asfTypePing,
+		},
+	}
+}
+
+// RMCP/ASF Pong Message (Section 13.2.4)
+type pongMessage struct {
+	rmcpHeader  *rmcpHeader
+	asfHeader   *asfHeader
+	IANA        uint32
+	OEM         uint32
+	SupEntities uint8
+	SupInteract uint8
+	Reserved    [6]byte
+}
+
+func (p *pongMessage) SupportedIPMI() bool {
+	return p.SupEntities&0x80 != 0
+}
+
+func (p *pongMessage) Unmarshal(buf []byte) ([]byte, error) {
+	if len(buf) < pongBodySize {
+		return nil, &MessageError{
+			Message: fmt.Sprintf("Invalid Pong body size : %d", len(buf)),
+			Detail:  hex.EncodeToString(buf),
+		}
+	}
+
+	p.IANA = binary.BigEndian.Uint32(buf)
+	p.OEM = binary.BigEndian.Uint32(buf[4:])
+	p.SupEntities = buf[8]
+	p.SupInteract = buf[9]
+	copy(p.Reserved[:], buf[10:])
+
+	return buf[pongBodySize:], nil
+}
+
+func (p *pongMessage) String() string {
+	return fmt.Sprintf(
+		`{"RMCPHeader":%s,"ASFHeader":%s,"IANA":%d,"OEM":%d,`+
+			`"SupEntities":%d,"SupInteract":%d,"Reserved":"%s"}`,
+		p.rmcpHeader, p.asfHeader, p.IANA, p.OEM, p.SupEntities, p.SupInteract,
+		hex.EncodeToString(p.Reserved[:]))
+}
+
+func ping(conn net.Conn, timeout time.Duration) error {
+	res, _, err := sendMessage(conn, newPingMessage(), timeout)
+	if err != nil {
+		return err
+	}
+
+	pong, ok := res.(*pongMessage)
+	if !ok {
+		return &MessageError{
+			Message: "Received an unexpected message (Ping)",
+			Detail:  res.String(),
+		}
+	}
+	if !pong.SupportedIPMI() {
+		return ErrNotSupportedIPMI
+	}
+
+	return nil
+}

client.go

@@ -0,0 +1,141 @@
+package ipmigo
+
+import (
+	"fmt"
+	"time"
+)
+
+type Version int
+
+const (
+	V1_5 Version = iota + 1
+	V2_0
+)
+
+// Channel Privilege Levels. (Section 6.8)
+type PrivilegeLevel uint8
+
+const (
+	PrivilegeCallback PrivilegeLevel = iota + 1
+	PrivilegeUser
+	PrivilegeOperator
+	PrivilegeAdministrator
+)
+
+func (p PrivilegeLevel) String() string {
+	switch p {
+	case PrivilegeCallback:
+		return "CALLBACK"
+	case PrivilegeUser:
+		return "USER"
+	case PrivilegeOperator:
+		return "OPERATOR"
+	case PrivilegeAdministrator:
+		return "ADMINISTRATOR"
+	default:
+		return fmt.Sprintf("Unknown(%d)", p)
+	}
+}
+
+// An argument for creating an IPMI Client
+type Arguments struct {
+	Version        Version        // IPMI version to use
+	Network        string         // See net.Dial parameter (The default is `udp`)
+	Address        string         // See net.Dial parameter
+	Timeout        time.Duration  // Each connect/read-write timeout (The default is 5sec)
+	Retries        uint           // Number of retries (The default is `0`)
+	Username       string         // Remote server username
+	Password       string         // Remote server password
+	PrivilegeLevel PrivilegeLevel // Session privilege level (The default is `Administrator`)
+	CipherSuiteID  uint           // ID of cipher suite, See Table 22-20 (The default is `0` which no auth and no encrypt)
+}
+
+func (a *Arguments) setDefault() {
+	if a.Version == 0 {
+		a.Version = V2_0
+	}
+	if a.Network == "" {
+		a.Network = "udp"
+	}
+	if a.Timeout == 0 {
+		a.Timeout = 5 * time.Second
+	}
+	if a.PrivilegeLevel == 0 {
+		a.PrivilegeLevel = PrivilegeAdministrator
+	}
+}
+
+func (a *Arguments) validate() error {
+	switch a.Version {
+	case V2_0:
+		if len(a.Password) > passwordMaxLengthV2_0 {
+			return &ArgumentError{
+				Value:   a.Password,
+				Message: "Password is too long",
+			}
+		}
+		if a.CipherSuiteID < 0 || a.CipherSuiteID > uint(len(cipherSuiteIDs)-1) {
+			return &ArgumentError{
+				Value:   a.CipherSuiteID,
+				Message: "Invalid Cipher Suite ID",
+			}
+		}
+		if a.CipherSuiteID > 3 {
+			return &ArgumentError{
+				Value:   a.CipherSuiteID,
+				Message: "Unsupported Cipher Suite ID in ipmigo",
+			}
+		}
+	case V1_5:
+		// TODO Support v1.5 ?
+		fallthrough
+	default:
+		return &ArgumentError{
+			Value:   a.Version,
+			Message: "Unsupported IPMI version",
+		}
+	}
+
+	if a.PrivilegeLevel < 0 || a.PrivilegeLevel > PrivilegeAdministrator {
+		return &ArgumentError{
+			Value:   a.PrivilegeLevel,
+			Message: "Invalid Privilege Level",
+		}
+	}
+
+	if len(a.Username) > userNameMaxLength {
+		return &ArgumentError{
+			Value:   a.Username,
+			Message: "Username is too long",
+		}
+	}
+
+	return nil
+}
+
+// IPMI Client
+type Client struct {
+	session session
+}
+
+func (c *Client) Ping() error               { return c.session.Ping() }
+func (c *Client) Open() error               { return c.session.Open() }
+func (c *Client) Close() error              { return c.session.Close() }
+func (c *Client) Execute(cmd Command) error { return c.session.Execute(cmd) }
+
+// Create an IPMI Client
+func NewClient(args Arguments) (*Client, error) {
+	if err := args.validate(); err != nil {
+		return nil, err
+	}
+	args.setDefault()
+
+	var s session
+	switch args.Version {
+	case V1_5:
+		s = newSessionV1_5(&args)
+	case V2_0:
+		s = newSessionV2_0(&args)
+	}
+	return &Client{session: s}, nil
+}