linux - [Solved-5 Solutions] How to get the ip address of the machine in Linux ? - ubuntu - red hat - debian - linux server - linux pc
Linux - Problem :
How to get the ip address of the machine ?
Linux - Solution 1:
Linux - Solution 2:
- Create a socket.
- Perform ioctl(
, SIOCGIFCONF, (struct ifconf)&buffer);
Read /usr/include/linux/if.h for information on the ifconf and ifreq structures. This should give you the IP address of each interface on the system. Also read /usr/include/linux/sockios.h for additional ioctls.
Linux - Solution 3:
- It uses the local routing table to find the IP address of the ethernet interface that would be used for a connection to a specific external host.
- By using a connected UDP socket, you can get the information without actually sending any packets.
- The approach requires that you choose a specific external host.
Linux - Solution 4:
As you have found out there is no such thing as a single "local IP address". Here's how to find out the local address that can be sent out to a specific host.
- Create a UDP socket
- Connect the socket to an outside address (the host that will eventually receive the local address)
- Use getsockname to get the local address
Linux - Solution 5:
You can try this: