Visit Our UNIX and Linux User Community


Get ip address


 
Thread Tools Search this Thread
Top Forums Programming Get ip address
# 1  
Old 04-25-2002
Get ip address

Hi
I am trying to get IP address of of my Irix server from my C program running on the host machine.
------------------------------------------------

#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>

main()
{
struct in_addr ia;
printf("host id %u\n", gethostid());
ia.s_addr = htonl(gethostid());
printf("My address: %s\n", inet_ntoa(ia));
exit(0);
}

--------------------------------------------------------------------

result
# a.out
host id 3555268269
My address: 255.255.255.255

__________________________________________
result is incorrect. help me plz..
# 2  
Old 04-26-2002
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

main ( )
{
char Buf [ 200 ] ;
struct hostent * Host = (struct hostent * ) malloc ( sizeof ( struct hostent ))
;
gethostname ( Buf , 200 ) ;
printf ( "%s\n", Buf ) ;
Host = ( struct hostent * ) gethostbyname ( Buf ) ;
printf ( "The name :: %s\n" , Host->h_name ) ;
printf("IP Address : %s\n", inet_ntoa(*((struct in_addr *)Host->h_addr)));
}
This module correctly prints the address.
# 3  
Old 04-28-2002
Quote:
Originally posted by S.P.Prasad
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

main ( )
{
char Buf [ 200 ] ;
struct hostent * Host = (struct hostent * ) malloc ( sizeof ( struct hostent ))
;
gethostname ( Buf , 200 ) ;
printf ( "%s\n", Buf ) ;
Host = ( struct hostent * ) gethostbyname ( Buf ) ;
printf ( "The name :: %s\n" , Host->h_name ) ;
printf("IP Address : %s\n", inet_ntoa(*((struct in_addr *)Host->h_addr)));
}
This module correctly prints the address.
------------------------------------------------------------------------
Thank you !!
but, result is incorect.

ha1
The name :: ha1
IP Address : 255.255.255.255

result is same.
# 4  
Old 05-01-2002
Replace

struct hostent * Host = (struct hostent * ) malloc ( sizeof ( struct hostent ));

with

struct hostent* Host;

and you should be OK.

Previous Thread | Next Thread
Test Your Knowledge in Computers #302
Difficulty: Easy
The GNU website is the official repository for Slackware.
True or False?

9 More Discussions You Might Find Interesting

1. IP Networking

MAC Address - Four Interfaces with the same MAC Address

four interfaces with ifconfig all interfaces have the same mac. If is not set for unique. but it still works. what difference does it make to have all macs the same or different? (4 Replies)
Discussion started by: rrodgers
4 Replies

2. UNIX for Advanced & Expert Users

C program to detect duplicate ip address if any after assigning ip address to ethernet interface

Hi , Could someone let me know how to detect duplicate ip address after assigning ip address to ethernet interface using c program (3 Replies)
Discussion started by: Gopi Krishna P
3 Replies

3. IP Networking

Tracing a MAC address to IP address: Solaris

Hi there I lost connectivity to one of our remote systems and when I checked the messages log I found the following: Aug 10 23:42:34 host xntpd: time reset (step) 1.681729 s Aug 16 13:20:51 host ip: WARNING: node "mac address" is using our IP address x.x.x.x on aggr1 Aug 16 13:20:51 host... (9 Replies)
Discussion started by: notreallyhere
9 Replies

4. UNIX for Dummies Questions & Answers

What would the physical address be for virtual address?

Hi guys, I got one problem which I definetily no idea. What would the physical address be for virtual address? 1) 2ABC 2) 3F4B Here is the page table:see attached Thank you sos sososososso much!! (0 Replies)
Discussion started by: lemon_06
0 Replies

5. Solaris

Get ip address from mac address

I have following message in my messages file on solaris 10 WARNING: e1000g3712000:3 has duplicate address 010.022.196.011 (in use by 00:50:56:85:25:ef); disabled Now is there any way i can find which server has 00:50:56:85:25:ef mac address either IP or Hostname ? (6 Replies)
Discussion started by: fugitive
6 Replies

6. UNIX for Dummies Questions & Answers

Panic kernal-mode address fault on user address 0x14

:) Firstly Hi all!!, im NEW!! and on here hoping that someone might be able to offer me some help... i have a server that keeps crashing every few days with the error message: PANIC KERNAL-MODE ADDRESS FAULT ON USER ADDRESS 0X14 KERNAL PAGE FAULT FROM (CS:EIP)=(100:EF71B5BD) EAX=EF822000... (10 Replies)
Discussion started by: Twix
10 Replies

7. Shell Programming and Scripting

ksh - how to list all ip address between 2 ip address

Trying to do a ksh script that needs to list all ip address between ip address a and b .. ie. Ip address A=192.168.1.200 Ip address B=192.168.2.15 So the subnet changes from 1 to 2 but I want to list all possible ip addresses between the 2.. Which would be: 192.168.1.200... (4 Replies)
Discussion started by: frustrated1
4 Replies

8. IP Networking

How to Achive IP address through MAC(Ethernet) address

Hi sir, i want to make such programe which takes MAC(Ethernet) address of any host & give me its IP address....... but i'm nt getting that how i can pass the MAC address to Frame........ Please give me an idea for making such program... Thanks & regards Krishna (3 Replies)
Discussion started by: krishnacins
3 Replies

9. UNIX for Dummies Questions & Answers

network address and broadcast address?

say I have a IP address which is 10.0.0.12, and subnet mask is 255.255.255.240, what is the network address and what is the broadcast address which host lives on? And could you explain how to get the answer? thanx in advance! (7 Replies)
Discussion started by: pnxi
7 Replies

Featured Tech Videos