string to ip address.

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how to make a function convert string into ipaddress in c++ or is there any inbuilt function to do this. (like atoi) plz help...

Posted 18-Apr-11 19:04pm

sujeet101

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Aamir Butt · Answer 1 · 2011-04-18T19:25:00

Your question is not clear since there is no default variable type in C++ which can hold an IP Address as an IP Address. However, if you have to use this IP Address for some sort of Socket communication, you will have to use a structure like sockaddr_in. If it is so, here is a solution (Taken from here[^]:

MIDL

int rc;
int s;
struct sockaddr_in myname;
/* clear the structure to be sure that the sin_zero field is clear */
memset(&myname, 0, sizeof(myname));
myname.sin_family = AF_INET;
myname.sin_addr = inet_addr("129.5.24.1");
myname.sin_port = htons(1024);

Bharat Kumar Arya · Answer 2 · 2011-04-18T19:39:00

I think what you want is
101.22.34.55 <----> www.something.com

Well look this is work of DNS.

This link may help you: http://www.stromcode.com/2008/03/02/cwin32-dns-resolution/[^]

To know more about DNS: see http://en.wikipedia.org/wiki/Domain_Name_System[^]

Hope this might help you!!! :)

Albert Holguin · Answer 3 · 2011-04-19T03:55:00

Don't think there's any built in solution for this (in C++ or MFC, although MFC does have an IP address control), but if you need to parse a string to an IP address, just use the '.' character to parse the octets, then check to make sure each number is between 0-255.

To use it, you'll probably end up having to put it in a structure as aamir suggested.

string to ip address.

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