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Go Systems Programming

You're reading from   Go Systems Programming Master Linux and Unix system level programming with Go

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787125643
Length 466 pages
Edition 1st Edition
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Author (1):
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Mihalis Tsoukalos Mihalis Tsoukalos
Author Profile Icon Mihalis Tsoukalos
Mihalis Tsoukalos
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Table of Contents (13) Chapters Close

Preface 1. Getting Started with Go and Unix Systems Programming FREE CHAPTER 2. Writing Programs in Go 3. Advanced Go Features 4. Go Packages, Algorithms, and Data Structures 5. Files and Directories 6. File Input and Output 7. Working with System Files 8. Processes and Signals 9. Goroutines - Basic Features 10. Goroutines - Advanced Features 11. Writing Web Applications in Go 12. Network Programming

Developing a simple UDP client

In this section, we will develop a UDP client, which we will name UDPclient.go and present in five parts.

As you will see, the code differences between the Go code of UDPclient.go and TCPc.go are basically the differences in the names of the functions used: the general idea is exactly the same.

The first part of the UDP client is the following:

package main 
 
import ( 
   "fmt" 
   "net" 
   "os" 
) 

The second part of the utility contains the following Go code:

func main() { 
   arguments := os.Args 
   if len(arguments) == 1 { 
         fmt.Println("Please provide a host:port string") 
         os.Exit(100) 
   } 
   CONNECT := arguments[1] 

The third part of UDPclient.go has the following Go code:

   s, err := net.ResolveUDPAddr("udp", CONNECT) 
   c, err := net.DialUDP("udp", nil, s...
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