Solved

dotted IP Address to unsigned char

Posted on 2008-10-17
6
263 Views
Last Modified: 2013-12-14
Hi

I need a piece of code to convest dotted IP address to an unsigned char array, example:
192.168.0.1
will be same as:
unsigned char the_ip[4] = {192, 168, 0, 1};

preferably I don't want to use std , pure C++ code is preferred

Please advice.

Thanks from now!
0
Comment
Question by:CSecurity
  • 4
  • 2
6 Comments
 
LVL 53

Expert Comment

by:Infinity08
ID: 22740097
The socket library contains a nice function for that : inet_pton :

        http://linux.die.net/man/3/inet_pton

called like this :
struct sockaddr_in sa;

inet_pton(AF_INET, "192.168.0.1", &(sa.sin_addr));
 

// now sa.sin_addr.s_addr contains a 32 bit value representing the IP address

Open in new window

0
 
LVL 53

Accepted Solution

by:
Infinity08 earned 500 total points
ID: 22740125
You can of course parse the IP address yourself if you really want to.

Here's one way :
const char *ip_addr = "192.168.0.1";

unsigned char ip[4] = { 0 };

if (4 != sscanf(ip_addr, "%u.%u.%u.%u", &(ip[0]), &(ip[1]), &(ip[2]), &(ip[3]))) {

  // error parsing the IP address !!

}

Open in new window

0
 
LVL 17

Author Comment

by:CSecurity
ID: 22740133
Thanks... but I'm using VC++ 6 and I don't want to include that library... Any ideas?
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 17

Author Closing Comment

by:CSecurity
ID: 31507103
Thanks
0
 
LVL 53

Expert Comment

by:Infinity08
ID: 22741398
>> and I don't want to include that library

That is the socket library, and if you want to do socket programming, you'll need it anyway :)
0
 
LVL 53

Expert Comment

by:Infinity08
ID: 22804108
The accepted code I posted earlier is not correct ... Do not use it ;)

Here's more info :

        http://www.experts-exchange.com/Programming/Languages/CPP/Q_23847222.html
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use nested-loops in the C programming language.
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now