Yu Watanabe
3c7f1c0757
See kernel's rtm_to_fib_config() in net/ipv4/fib_frontend.c and rtm_to_fib6_config() in net/ipv6/route.c. Note that if both gateway and multipath routes are specified, then kernel ignores gateway. So, strictly speaking, setting both gateway and multipath routes is allowed by kernel. But such situation is mostly user's misconfiguration. Let's refuse it. Note that the conditions newly added in route_configure() are redundant, as all static configurations are already verified in route_section_verify(), and dynamic configurations do not set nexthop_id or multipath routes. Just for safety.
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