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Made dhcpv6 packet easier to test

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This commit is contained in:
Dmitri Dolguikh 2017-09-28 16:36:54 -07:00 committed by Dave Anderson
parent b6741d78b8
commit bf8701a8c5
2 changed files with 16 additions and 21 deletions
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30
dhcp6/packet.go
View File

@ -5,6 +5,7 @@ import (
"net" "net"
"encoding/binary" "encoding/binary"
"bytes" "bytes"
"golang.org/x/tools/go/gcimporter15/testdata"
) )
type MessageType uint8 type MessageType uint8
@ -28,21 +29,16 @@ const (
type Packet struct { type Packet struct {
Type MessageType Type MessageType
TransactionID [3]byte TransactionID [3]byte
Options []byte Options Options
} }
func MakePacket(bs []byte, len int) *Packet { func MakePacket(bs []byte, len int) (*Packet, error) {
ret := &Packet{Type: MessageType(bs[0]), Options: make([]byte, len - 4)} options, err := MakeOptions(bs[4:]) // 4:len?
copy(ret.TransactionID[:], bs[1:4])
copy(ret.Options[:], bs[4:len])
return ret
}
func (p *Packet) UnmarshalOptions() (Options, error) {
ret, err := MakeOptions(p.Options)
if err != nil { if err != nil {
return nil, fmt.Errorf("packet has malformed options section: %s", err) return nil, fmt.Errorf("packet has malformed options section: %s", err)
} }
ret := &Packet{Type: MessageType(bs[0]), Options: options}
copy(ret.TransactionID[:], bs[1:4])
return ret, nil return ret, nil
} }
@ -62,7 +58,7 @@ func (p *Packet) BuildResponse(serverDuid []byte) ([]byte, error) {
} }
func (p *Packet) BuildMsgAdvertise(serverDuid []byte) ([]byte, error) { func (p *Packet) BuildMsgAdvertise(serverDuid []byte) ([]byte, error) {
in_options, _ := p.UnmarshalOptions() in_options := p.Options
ret_options := make(Options) ret_options := make(Options)
ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value}) ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value})
@ -92,7 +88,7 @@ func (p *Packet) BuildMsgAdvertise(serverDuid []byte) ([]byte, error) {
// TODO: OptClientArchType may not be present // TODO: OptClientArchType may not be present
func (p *Packet) BuildMsgReply(serverDuid []byte) ([]byte, error) { func (p *Packet) BuildMsgReply(serverDuid []byte) ([]byte, error) {
in_options, _ := p.UnmarshalOptions() in_options := p.Options
ret_options := make(Options) ret_options := make(Options)
ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value}) ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value})
@ -116,7 +112,7 @@ func (p *Packet) BuildMsgReply(serverDuid []byte) ([]byte, error) {
} }
func (p *Packet) BuildMsgInformationRequestReply(serverDuid []byte) ([]byte, error) { func (p *Packet) BuildMsgInformationRequestReply(serverDuid []byte) ([]byte, error) {
in_options, _ := p.UnmarshalOptions() in_options := p.Options
ret_options := make(Options) ret_options := make(Options)
ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value}) ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value})
@ -138,7 +134,7 @@ func (p *Packet) BuildMsgInformationRequestReply(serverDuid []byte) ([]byte, err
} }
func (p *Packet) BuildMsgReleaseReply(serverDuid []byte) ([]byte, error){ func (p *Packet) BuildMsgReleaseReply(serverDuid []byte) ([]byte, error){
in_options, _ := p.UnmarshalOptions() in_options := p.Options
ret_options := make(Options) ret_options := make(Options)
ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value}) ret_options.AddOption(&Option{Id: OptClientId, Length: uint16(len(in_options[OptClientId].Value)), Value: in_options[OptClientId].Value})
@ -172,7 +168,7 @@ func (p *Packet) ShouldDiscard(serverDuid []byte) error {
} }
func ShouldDiscardSolicit(p *Packet) error { func ShouldDiscardSolicit(p *Packet) error {
options, _ := MakeOptions(p.Options) options := p.Options
if !options.RequestedBootFileUrlOption() { if !options.RequestedBootFileUrlOption() {
return fmt.Errorf("'Solicit' packet doesn't have file url option") return fmt.Errorf("'Solicit' packet doesn't have file url option")
} }
@ -186,7 +182,7 @@ func ShouldDiscardSolicit(p *Packet) error {
} }
func ShouldDiscardRequest(p *Packet, serverDuid []byte) error { func ShouldDiscardRequest(p *Packet, serverDuid []byte) error {
options, _ := MakeOptions(p.Options) options := p.Options
if !options.RequestedBootFileUrlOption() { if !options.RequestedBootFileUrlOption() {
return fmt.Errorf("'Request' packet doesn't have file url option") return fmt.Errorf("'Request' packet doesn't have file url option")
} }
@ -203,7 +199,7 @@ func ShouldDiscardRequest(p *Packet, serverDuid []byte) error {
} }
func ShouldDiscardInformationRequest(p *Packet, serverDuid []byte) error { func ShouldDiscardInformationRequest(p *Packet, serverDuid []byte) error {
options, _ := MakeOptions(p.Options) options := p.Options
if !options.RequestedBootFileUrlOption() { if !options.RequestedBootFileUrlOption() {
return fmt.Errorf("'Information-request' packet doesn't have boot file url option") return fmt.Errorf("'Information-request' packet doesn't have boot file url option")
} }

7
pixiecore/dhcpv6.go
View File

@ -17,8 +17,7 @@ func (s *ServerV6) serveDHCP(conn *dhcp6.Conn) error {
continue continue
} }
opts, _ := pkt.UnmarshalOptions() s.log("dhcpv6", fmt.Sprintf("Received (%d) packet (%d): %s\n", pkt.Type, pkt.TransactionID, pkt.Options.HumanReadable()))
s.log("dhcpv6", fmt.Sprintf("Received (%d) packet (%d): %s\n", pkt.Type, pkt.TransactionID, opts.HumanReadable()))
response, _ := pkt.BuildResponse(s.Duid) response, _ := pkt.BuildResponse(s.Duid)
if err := conn.SendDHCP(src, response); err != nil { if err := conn.SendDHCP(src, response); err != nil {
@ -26,8 +25,8 @@ func (s *ServerV6) serveDHCP(conn *dhcp6.Conn) error {
continue continue
} }
reply_packet := dhcp6.MakePacket(response, len(response)) reply_packet, _ := dhcp6.MakePacket(response, len(response))
reply_opts,_ := reply_packet.UnmarshalOptions() reply_opts := reply_packet.Options
s.log("dhcpv6", fmt.Sprintf("Sent (%d) packet (%d): %s\n", reply_packet.Type, reply_packet.TransactionID, reply_opts.HumanReadable())) s.log("dhcpv6", fmt.Sprintf("Sent (%d) packet (%d): %s\n", reply_packet.Type, reply_packet.TransactionID, reply_opts.HumanReadable()))
} }