Hello, I have two network interfaces: ethernet and ppp (they obviously don't share a subnet). I need to open a number of TCP connections with the requirement, that certain connections must be opened via a particular interface. I was trying to achieve that by binding to an address-port prior to connecting, where the address corresponds to an address of a particular interface.
However, I've noticed that when the destination is not in the same network with any of the interfaces, the packets fail to route, even though the default gateway on the interface is defined (so there should be no problem routing the packet). While reading the source of ip4.c I've realized, that * the source address is not considered, which means, that binding to a particular address before connecting is apparently meaningless * the gw, that's set on the interface is not considered I understand, that gw *is* considered in etharp_output, but since it is called after ip_route, it is never reached. etharp_output is not relevant for ppp, too. I see, there's the notion of a "default" interface, but I believe, that it does not apply to my case, since is a requirement, that certain connections must go through certain interfaces. Hopefully, I've managed to express my question adequately. Is there anything that could be done? I see, that I could define LWIP_HOOK_IP4_ROUTE, but, unfortunately, it does not receive the source address as an argument, so that would not work. Maybe, I am missing something obvious? Thanks in advance, Mark _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
