Sponsored Content
Full Discussion: host name to IP address
Top Forums Programming host name to IP address Post 302179811 by shamrock on Friday 28th of March 2008 02:58:07 PM
Old 03-28-2008
Quote:
Originally Posted by cleopard
There's a piece in a C program I'm writing (Linux) that simply needs to take a host name and return an IP address (e.g., take 'mail.gnu.org' and return 199.232.76.166). I've gotten a successful status from getaddrinfo, but don't see any of the fields in the result structure that has what I'm looking for, and similar for the structure returned by gethostbyname. I'm wondering if I need to use a function like 'inet_addr' on one of those values to get what I'm looking for. Thank you.
Post the C program because without the source it is not possible to figure out why the fields of the structure are not being filled. My guess would be that you have declared a pointer to that structure but not an object of that type. In any case it would be nice to see the code.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Server name + IP address removed from host table after rebooting

Hi, I have a problem with a Unix server (SCO Unix version 3.2). If this server is rebooted the own server name and it's IP address is removed from the host table. How is this possible? How can i solve this problem? (3 Replies)
Discussion started by: FIRE
3 Replies

2. UNIX for Advanced & Expert Users

Host IP address for a telnet session

I am using Tru64UX 5.1a on alphaserver 4100. Users access the application through Telnet sessions to this server. My requirement is to limit the users login through their PCs only. Is there any way I can accomplish this on the unix box ? I want to include a script in the .profile ( or... (1 Reply)
Discussion started by: shauche
1 Replies

3. Solaris

Host ID vs MAC Address

Hi, I've got a Sun Solaris machine with host ID (840f8e57) and MAC address (0:14:4f:f:8e:57), how do I: 1. Write the MAC address in standard (IEEE 802) format, i.e. xx-xx-xx-xx-xx-xx? Do I need to add 0's before or after the 'f', i.e. 00-14-4f-0f-8e-57 or 00-14-4f-f0-8e-57? 2. What is... (4 Replies)
Discussion started by: TheBlueSky
4 Replies

4. Solaris

How to get the IP address / Host name of client machine

Hi How to get the IP address / Host name of a particular user connected to Unix Server. For example: If used 'DevUser1' is connected to Unix server. I need to find out from which PC this connection has been made. How can this be achieved? Thanks (6 Replies)
Discussion started by: MVL
6 Replies

5. Solaris

No value in Ethernet address and Host ID at Ok prompt

Hi All, In Ultra 10 at time system is not displaying value for Ethernet address and Host ID. Also, when i am trying to change the value of environment variables i am getting below message and value is not changing Thanks (4 Replies)
Discussion started by: kumarmani
4 Replies

6. Programming

get host name by IP address

I'm trying to write a function to get the host name of any given IP address. I'm trying to follow this manual but I'm stuck. I'm using gcc and Linux. Any ideas? getnameinfo() #include <stdio.h> #include <netdb.h> #include <sys/socket.h> #include <arpa/inet.h> char... (6 Replies)
Discussion started by: limmer
6 Replies

7. UNIX for Advanced & Expert Users

Help! How to find the local host after few ssh hops to remote host???

I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1. When I do a who -m from A2, I see the "connected from" as "A1". => who -m userid pts/2 2010-03-27 08:47 (A1) I want to identify who is the local host who initiated the connection to... (3 Replies)
Discussion started by: gomes1333
3 Replies

8. Red Hat

Static IP Address setup for vm as well as the host system

Hello, Greetings!! I have a server with 3 TB of disk space and 12 GB RAM and a i7 processor. What I did thus far is to install Oracle Enterprise Linux (OEL 5.7)as the host system and install Oracle Virtual box and created 3 VM's. Installed OEL 5.7 on one of the VM, working on installing... (1 Reply)
Discussion started by: rparavastu
1 Replies

9. UNIX for Dummies Questions & Answers

Command for Host Name to IP Address or Vice Versa

Hi, In unix or linux is there any command exist to identify Host Name to IP Address or Vice Versa? Thanks in advance (6 Replies)
Discussion started by: nag_sathi
6 Replies

10. IP Networking

IP address to host name conversion

hi, i want to get the hostname for the specified IP address. # host www.google.com www.google.com has address 173.194.69.104 www.google.com has address 173.194.69.105 www.google.com has address 173.194.69.106 www.google.com has address 173.194.69.147 www.google.com has address... (3 Replies)
Discussion started by: kavitha rao
3 Replies
socket_to_name(3ncs)													      socket_to_name(3ncs)

Name
       socket_to_name - convert a socket address to a name and port number

Syntax
       #include <idl/c/socket.h>

       void socket_$to_name(sockaddr, slength, name, nlength, port, status)
       socket_$addr_t *sockaddr;
       unsigned long slength;
       socket_$string_t name;
       unsigned long *nlength;
       unsigned long *port;
       status_$t *status;

Arguments
       sockaddr 	   A socket address.  The socket address is the structure returned by either or

       slength		   The length, in bytes, of sockaddr.

       name		   A  string in the format family:host[port], where family is the address family and host is the host name; host may be in
			   the standard numeric form (for example, #192.1.2.3) if a textual host name cannot be obtained.  Currently, only  ip	is
			   supported for family.

       nlength		   On input, the maximum length, in bytes, of the name to be returned.	On output, the actual length of the name returned.

       port		   The port number.

       status		   The	completion status. If the completion status returned in is equal to status_$ok , then the routine that supplied it
			   was successful.

Description
       The routine converts a socket address to a textual address family, host name, and port number.

Files
See Also
       intro(3ncs), socket_family_to_name(3ncs), socket_from_name(3ncs), socket_to_numeric_name(3ncs)

															      socket_to_name(3ncs)
All times are GMT -4. The time now is 07:00 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy