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8.0

Lookup IP address from hostname (C/socket)

Asked by pluim in Unix Networking

Tags: ip, address, c, hostname

How do I find the IP address for a given host, in C?
This is on a UNIX box (AIX), TCP/IP installed and
DNS available. Assume a hostname has no aliases and
only one associated IP address.

This is the code I have so far:

  struct hostent      *host;
  struct sockaddr_in  sa;
  char                ipaddress[32];

  host=gethostbyname("someserver.com");

  ... get IP address ...

  memset (&sa, '\0', sizeof(sa));
  sa.sin_family      = AF_INET;
  sa.sin_addr.s_addr=inet_addr(ipaddress);
  sa.sin_port        = 80;          

Thanks,
pluim.
[+][-]07/19/99 02:44 AM, ID: 1583898Accepted Solution

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About this solution

Zone: Unix Networking
Tags: ip, address, c, hostname
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Solution Provided By: alextr
Participating Experts: 2
Solution Grade: A
 
[+][-]07/15/99 09:31 PM, ID: 1583896Expert Comment

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[+][-]07/16/99 06:39 AM, ID: 1583897Author Comment

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