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Merge pull request #45 from Mythologyli/dns-hijack-new
feat: add dns-hijack for tun mode
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| package terminal_func | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/mythologyli/zju-connect/log" | ||
| ) | ||
|
|
||
| type TerminalFunc func(ctx context.Context) error | ||
| type TerminalItem struct { | ||
| f TerminalFunc | ||
| name string | ||
| } | ||
|
|
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| var terminalFuncList []TerminalItem | ||
|
|
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| var terminalBegin = false | ||
|
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| func RegisterTerminalFunc(execName string, fun TerminalFunc) { | ||
| terminalFuncList = append(terminalFuncList, TerminalItem{ | ||
| f: fun, | ||
| name: execName, | ||
| }) | ||
| log.Println("Register func on terminal:", execName) | ||
| } | ||
|
|
||
| func ExecTerminalFunc(ctx context.Context) []error { | ||
| var errList []error | ||
| terminalBegin = true | ||
| for _, item := range terminalFuncList { | ||
| log.Println("Exec func on terminal:", item.name) | ||
| if err := item.f(ctx); err != nil { | ||
| errList = append(errList, err) | ||
| log.Println("Exec func on terminal ", item.name, "failed:", err) | ||
| } else { | ||
| log.Println("Exec func on terminal ", item.name, "success") | ||
| } | ||
| } | ||
| return errList | ||
| } | ||
|
|
||
| func IsTerminal() bool { | ||
| return terminalBegin | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| package zcdns | ||
|
|
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| import ( | ||
| "context" | ||
|
|
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| "github.com/miekg/dns" | ||
| "net" | ||
| ) | ||
|
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| type LocalServer interface { | ||
| HandleDnsMsg(ctx context.Context, msg *dns.Msg) (*dns.Msg, error) | ||
| CheckDnsHijack(dstIP net.IP) bool | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package zctcpip | ||
|
|
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| import ( | ||
| "encoding/binary" | ||
| ) | ||
|
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| type ICMPType = byte | ||
|
|
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| const ( | ||
| ICMPTypePingRequest byte = 0x8 | ||
| ICMPTypePingResponse byte = 0x0 | ||
| ) | ||
|
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| type ICMPPacket []byte | ||
|
|
||
| func (p ICMPPacket) Type() ICMPType { | ||
| return p[0] | ||
| } | ||
|
|
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| func (p ICMPPacket) SetType(v ICMPType) { | ||
| p[0] = v | ||
| } | ||
|
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| func (p ICMPPacket) Code() byte { | ||
| return p[1] | ||
| } | ||
|
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| func (p ICMPPacket) Checksum() uint16 { | ||
| return binary.BigEndian.Uint16(p[2:]) | ||
| } | ||
|
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| func (p ICMPPacket) SetChecksum(sum [2]byte) { | ||
| p[2] = sum[0] | ||
| p[3] = sum[1] | ||
| } | ||
|
|
||
| func (p ICMPPacket) ResetChecksum() { | ||
| p.SetChecksum(zeroChecksum) | ||
| p.SetChecksum(Checksum(0, p)) | ||
| } |
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