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The kernel uses some default metric when routes are managed. For example, a static route added with a metric set to 0 is inserted in the kernel with metric 1024 (IP6_RT_PRIO_USER). It is useful for routing daemons to know these values, to be able to set routes without interfering with what the kernel does. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/*
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UAPI_LINUX_IPV6_ROUTE_H
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#define _UAPI_LINUX_IPV6_ROUTE_H
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#include <linux/types.h>
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#define RTF_DEFAULT 0x00010000 /* default - learned via ND */
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#define RTF_ALLONLINK 0x00020000 /* (deprecated and will be removed)
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fallback, no routers on link */
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#define RTF_ADDRCONF 0x00040000 /* addrconf route - RA */
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#define RTF_PREFIX_RT 0x00080000 /* A prefix only route - RA */
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#define RTF_ANYCAST 0x00100000 /* Anycast */
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#define RTF_NONEXTHOP 0x00200000 /* route with no nexthop */
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#define RTF_EXPIRES 0x00400000
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#define RTF_ROUTEINFO 0x00800000 /* route information - RA */
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#define RTF_CACHE 0x01000000 /* cache entry */
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#define RTF_FLOW 0x02000000 /* flow significant route */
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#define RTF_POLICY 0x04000000 /* policy route */
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#define RTF_PREF(pref) ((pref) << 27)
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#define RTF_PREF_MASK 0x18000000
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#define RTF_LOCAL 0x80000000
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struct in6_rtmsg {
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struct in6_addr rtmsg_dst;
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struct in6_addr rtmsg_src;
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struct in6_addr rtmsg_gateway;
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__u32 rtmsg_type;
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__u16 rtmsg_dst_len;
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__u16 rtmsg_src_len;
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__u32 rtmsg_metric;
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unsigned long rtmsg_info;
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__u32 rtmsg_flags;
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int rtmsg_ifindex;
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};
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#define RTMSG_NEWDEVICE 0x11
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#define RTMSG_DELDEVICE 0x12
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#define RTMSG_NEWROUTE 0x21
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#define RTMSG_DELROUTE 0x22
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#define IP6_RT_PRIO_USER 1024
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#define IP6_RT_PRIO_ADDRCONF 256
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#endif /* _UAPI_LINUX_IPV6_ROUTE_H */
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