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rtnetlink.7: Add missing RTA_* attributes 

Used Bird's source code, kernel source code, iproute2 source code
and iproute2 manpages to find meanings of these new attributes.

Signed-off-by: Jan Moskyto Matejka <mq@ucw.cz>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Jan Moskyto Matejka 2020-04-23 21:28:05 +02:00 committed by Michael Kerrisk
parent 0345d654d3
commit a4c92224ac
1 changed files with 53 additions and 6 deletions
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59
man7/rtnetlink.7
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@ -200,7 +200,7 @@ struct rtmsg {
unsigned char rtm_src_len; /* Length of source */
unsigned char rtm_tos; /* TOS filter */
unsigned char rtm_table; /* Routing table ID */
unsigned char rtm_table; /* Routing table ID; see RTA_TABLE below */
unsigned char rtm_protocol; /* Routing protocol; see below */
unsigned char rtm_scope; /* See below */
unsigned char rtm_type; /* See below */
@ -319,13 +319,60 @@ RTA_IIF:int:Input interface index.
RTA_OIF:int:Output interface index.
RTA_GATEWAY:protocol address:The gateway of the route
RTA_PRIORITY:int:Priority of route.
RTA_PREFSRC::
RTA_PREFSRC:protocol address:Preferred source address.
RTA_METRICS:int:Route metric
RTA_MULTIPATH::
RTA_PROTOINFO::
RTA_FLOW::
RTA_CACHEINFO::
RTA_MULTIPATH::Multipath nexthop data (see below).
RTA_PROTOINFO::No longer used
RTA_FLOW:int:Route realm
RTA_CACHEINFO:struct rta_cacheinfo:(see linux/rtnetlink.h)
RTA_SESSION::No longer used
RTA_MP_ALGO::No longer used
RTA_TABLE:int:Routing table ID; if set, rtm_table is ignored.
RTA_MARK:int:
RTA_MFC_STATS:struct rta_mfc_stats:(see linux/rtnetlink.h)
RTA_VIA:struct rtvia:Gateway in different AF (see below).
RTA_NEWDST:protocol address:Change packet destination address.
RTA_PREF:char:RFC4191 IPv6 router preference (see below).
RTA_ENCAP_TYPE:short:Encapsulation type for lwtunnels (see below).
RTA_ENCAP::Defined by RTA_ENCAP_TYPE.
RTA_EXPIRES:int:Expire time for IPv6 routes (in seconds).
.TE
.I RTA_MULTIPATH
contains several packed instances of
.I struct rtnexthop
together with nested RTA's (RTA_GATEWAY)
.nf
struct rtnexthop {
unsigned short rtnh_len; /* Length of struct + length of RTA's
unsigned char rtnh_flags; /* Flags (see linux/rtnetlink.h) */
unsigned char rtnh_hops; /* Nexthop priority */
int rtnh_ifindex; /* Interface index for this nexthop */
}
There exist a bunch of RTNH_* macros similar to RTA_* and NLHDR_* macros
useful to handle these structures.
.nf
struct rtvia {
unsigned short rtvia_family;
unsigned char rtvia_addr[0];
};
.fi
.I rtvia_addr
is the address,
.I rtvia_family
is its family type.
.I RTA_PREF
may contain values ICMPV6_ROUTER_PREF_LOW,
ICMPV6_ROUTER_PREF_MEDIUM and
ICMPV6_ROUTER_PREF_HIGH defined in <linux/icmpv6.h>
.I RTA_ENCAP_TYPE
may contain values LWTUNNEL_ENCAP_MPLS, LWTUNNEL_ENCAP_IP, LWTUNNEL_ENCAP_ILA or LWTUNNEL_ENCAP_IP6
defined in <linux/lwtunnel.h>
.sp 1
.B Fill these values in!
.TP