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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| // Copyright (c) 2016-present Cloud <cloud@txthinking.com> | ||
| // | ||
| // This program is free software; you can redistribute it and/or | ||
| // modify it under the terms of version 3 of the GNU General Public | ||
| // License as published by the Free Software Foundation. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, but | ||
| // WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| // General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
|
|
||
| package brook | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
| ) | ||
|
|
||
| func EchoClient(server string, times int) error { | ||
| c, err := net.Dial("tcp", server) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer c.Close() | ||
| var b [1024 * 2]byte | ||
| for i := 0; i < times; i++ { | ||
| if _, err := c.Write([]byte(c.LocalAddr().String())); err != nil { | ||
| return err | ||
| } | ||
| i, err := c.Read(b[:]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if c.LocalAddr().String() == string(b[:i]) { | ||
| fmt.Printf("TCP: src:%s -> dst:%s\n", c.LocalAddr().String(), c.RemoteAddr().String()) | ||
| fmt.Printf("TCP: dst:%s <- src:%s\n", c.LocalAddr().String(), c.RemoteAddr().String()) | ||
| } | ||
| if c.LocalAddr().String() != string(b[:i]) { | ||
| fmt.Printf("TCP: src:%s -> dst:proxy -> src:proxy -> dst:%s\n", c.LocalAddr().String(), c.RemoteAddr().String()) | ||
| fmt.Printf("TCP: dst:%s <- src:proxy <- dst:%s <- src:%s\n", c.LocalAddr().String(), string(b[:i]), c.RemoteAddr().String()) | ||
| } | ||
| } | ||
|
|
||
| raddr, err := net.ResolveUDPAddr("udp", server) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| c1, err := net.ListenUDP("udp", nil) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer c1.Close() | ||
| for i := 0; i < times; i++ { | ||
| if _, err := c1.WriteToUDP([]byte(c1.LocalAddr().String()), raddr); err != nil { | ||
| return err | ||
| } | ||
| i, addr, err := c1.ReadFromUDP(b[:]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if c1.LocalAddr().String() == string(b[:i]) { | ||
| fmt.Printf("UDP: src:%s -> dst:%s\n", c1.LocalAddr().String(), raddr.String()) | ||
| fmt.Printf("UDP: dst:%s <- src:%s\n", c1.LocalAddr().String(), addr.String()) | ||
| } | ||
| if c1.LocalAddr().String() != string(b[:i]) { | ||
| fmt.Printf("UDP: src:%s -> dst:proxy -> src:proxy -> dst:%s\n", c1.LocalAddr().String(), raddr.String()) | ||
| fmt.Printf("UDP: dst:%s <- src:proxy <- dst:%s <- src:%s\n", c1.LocalAddr().String(), string(b[:i]), addr.String()) | ||
| } | ||
| } | ||
| return nil | ||
| } |
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