![]() Now I have a file auto.tmp containing the automatically generated address: 10.1.46.A default gateway is the node in a computer network using the Internet protocol suite that serves as the forwarding host ( router) to other networks when no other route specification matches the destination IP address of a packet.Ī gateway is a network node that serves as an access point to another network, often involving not only a change of addressing, but also a different networking technology. Finally, I have to add the Python script to Shell script: python autoaddr.py gateway.tmp addrs.tmp > auto.tmp To avoid extra dependencies, I didnot use libraries like netaddr and ipaddress. Gateway = open(sys.argv).readline().strip() # usage: python autoaddr.py gateway_file addrs_file If binary_and(bin_ip, bin_mask) = binary_and(bin_net, bin_mask): Net_addr, bits = net_cidr_notation.split("/") However, it works only on part of the this is my script: route -n | awk '$1 = "0.0.0.0" ".format(a, b, c, d) PS: It has been suggested that we can call connect() on a udp socket, and then call getsockname() to get local address. Find the address which is in the same subnet with default gateway (192.168.1.1).How can I get the address "192.168.1.100"? Any approach is ok: Python, Shell, UNIX C API. And the address of eth0 is, for example, 192.168.1.100. The address of the default gateway, for example, is 192.168.1.1. ![]() There may be several network interfaces on a server, e.g., lo, eth0, eth1įrom the route table, I know that eth0 is connected to the default gateway.
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