Golang : syscall.Socket example
Just a comparison on how Golang code that utilize net
package looks like if implemented with syscall.Socket
example :
package main
import (
"fmt"
"net"
"os"
)
func main() {
service := "127.0.0.1"
protocol := "icmp"
IPAddr, err := net.ResolveIPAddr("ip4", service)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
IPconn, err := net.ListenIP("ip4:"+protocol, IPAddr)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
buffer := make([]byte, 1024)
for { // display the bytes read from IP connection
num, clientAddr, _ := IPconn.ReadFrom(buffer)
fmt.Println("Reading from : ", clientAddr)
fmt.Printf("% X\n", buffer[:num])
}
}
to
package main
import (
"fmt"
"os"
"syscall"
)
func main() {
fd, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_RAW, syscall.IPPROTO_ICMP)
if err != nil {
fmt.Println(err)
}
file := os.NewFile(uintptr(fd), "")
for {
buffer := make([]byte, 1024)
num, _ := file.Read(buffer)
fmt.Printf("% X\n", buffer[:num])
}
}
References :
http://www.darkcoding.net/software/raw-sockets-in-go-link-layer/
https://www.socketloop.com/references/golang-net-fileconn-function-example
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+27.2k Golang : Detect (OS) Operating System
+7.7k Golang : Find network service name from given port and protocol
+16.3k Golang : Login and logout a user after password verification and redirect example
+14k Golang : Get digits from integer before and after given position example
+21.1k Golang : How to read JPG(JPEG), GIF and PNG files ?
+7.3k Swift : Convert (cast) Character to Integer?
+9.1k Golang : Get login name from environment and prompt for password
+28.7k Get client IP Address in Go
+7.6k Golang : Convert(cast) []byte to io.Reader type
+26.6k Golang : Change a file last modified date and time
+7.7k Golang : Sort lines of text example