-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Kashif Shaikh wrote: > Hello, > > I have a multi-homed host with two interfaces: eth0: 10.0.0.1 and a > virtual interface eth0:0 10.0.0.101. What I'm trying to do is send a > broadcast packet to 10.0.0.255 using the virtual IP as the source > address(since both IPs are on the same network). > > Currently, when I create the destination broadcast socket and send some > data, tcpdump shows the source IP to be 10.0.0.1. But I need the source > IP to be 10.0.0.101! You don't have to 'change the source IP of packets'... you want the packets to be created with a specific source address. Just be sure to call bind() on the socket before you send UDP packets. There you specify the local address used (that's why it's called "bind to that address"). Most programs use INADDR_ANY for the local address, since it means the socket can hear on any interface. It's undefined what address it would use for transmission; but users don't care about that. Since it's not your case, specify the correct local address on bind(). - ------ Javier -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+NyYRsIoGnxsRK/ERAkGMAJ9mz23sIPsfzu3l5CQ8LLJ0g0bvdACfVyYA 49C07GxOj/1z2FVaL+xHfcU= =ROyR -----END PGP SIGNATURE----- -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
