Created
August 24, 2021 12:22
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Golang, http with SO_BINDTOINTERFACE
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| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "net" | |
| "net/http" | |
| "syscall" | |
| ) | |
| func HTTPClientOnInterface(iface string) *http.Client { | |
| return &http.Client{ | |
| Transport: &http.Transport{ | |
| DialContext: (&net.Dialer{ | |
| Control: func(network, address string, c syscall.RawConn) error { | |
| var errSock error | |
| err := c.Control((func(fd uintptr) { | |
| errSock = syscall.SetsockoptString(int(fd), syscall.SOL_SOCKET, syscall.SO_BINDTODEVICE, iface) | |
| return | |
| })) | |
| if err != nil { | |
| return err | |
| } | |
| return errSock | |
| }, | |
| }).DialContext, | |
| }, | |
| } | |
| } | |
| func main() { | |
| client := HTTPClientOnInterface("eth0") | |
| resp, err := client.Get("https://ifconfig.me/") | |
| if err != nil { | |
| panic(err) | |
| } | |
| defer resp.Body.Close() | |
| body, err := io.ReadAll(resp.Body) | |
| if err != nil { | |
| panic(err) | |
| } | |
| fmt.Println(string(body)) | |
| } |
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