conf, tap: Split netlink and pasta functions, allow interface configuration

Move netlink routines to their own file, and use netlink to configure
or fetch all the information we need, except for the TUNSETIFF ioctl.

Move pasta-specific functions to their own file as well, add
parameters and calls to configure the tap interface in the namespace.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tcp.c b/tcp.c
index c862632..2abcaf8 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1852,7 +1852,7 @@ static void tcp_conn_from_tap(struct ctx *c, int af, void *addr,
 		struct sockaddr_in6 addr6_ll = {
 			.sin6_family = AF_INET6,
 			.sin6_addr = c->addr6_ll,
-			.sin6_scope_id = if_nametoindex(c->ifn),
+			.sin6_scope_id = c->ifi,
 		};
 		bind(s, (struct sockaddr *)&addr6_ll, sizeof(addr6_ll));
 	}