ip: support RFC4191 router preference
This allows querying and setting the route preference. It's usually set from the IPv6 Neighbor Discovery Router Advertisement messages. Introduced in "ipv6: expose RFC4191 route preference via rtnetlink", enqueued for Linux 4.1. Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
This commit is contained in:
Lubomir Rintel
Stephen Hemminger
parent
dacc5d4197
commit
194e9b855d
|
|
@ -1432,6 +1432,17 @@ database.
|
|||
even if it does not match any interface prefix. One application of this
|
||||
option may be found in~\cite{IP-TUNNELS}.
|
||||
|
||||
\item \verb|pref PREF|
|
||||
|
||||
--- the IPv6 route preference.
|
||||
\verb|PREF| PREF is a string specifying the route preference as defined in
|
||||
RFC4191 for Router Discovery messages. Namely:
|
||||
\begin{itemize}
|
||||
\item \verb|low| --- the route has a lowest priority.
|
||||
\item \verb|medium| --- the route has a default priority.
|
||||
\item \verb|high| --- the route has a highest priority.
|
||||
\end{itemize}
|
||||
|
||||
\end{itemize}
|
||||
|
||||
|
||||
|
|
|
|||
35
ip/iproute.c
35
ip/iproute.c
|
|
@ -23,6 +23,7 @@
|
|||
#include <netinet/ip.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <linux/in_route.h>
|
||||
#include <linux/icmpv6.h>
|
||||
#include <errno.h>
|
||||
|
||||
#include "rt_names.h"
|
||||
|
|
@ -83,12 +84,14 @@ static void usage(void)
|
|||
fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
|
||||
fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
|
||||
fprintf(stderr, " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n");
|
||||
fprintf(stderr, " [ pref PREF ]\n");
|
||||
fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
|
||||
fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n");
|
||||
fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
|
||||
fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
|
||||
fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
|
||||
fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
|
||||
fprintf(stderr, "PREF := [ low | medium | high ]\n");
|
||||
fprintf(stderr, "TIME := NUMBER[s|ms]\n");
|
||||
fprintf(stderr, "BOOL := [1|0]\n");
|
||||
fprintf(stderr, "FEATURES := ecn\n");
|
||||
|
|
@ -671,6 +674,24 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
|
|||
nh = RTNH_NEXT(nh);
|
||||
}
|
||||
}
|
||||
if (tb[RTA_PREF]) {
|
||||
unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
|
||||
fprintf(fp, " pref ");
|
||||
|
||||
switch (pref) {
|
||||
case ICMPV6_ROUTER_PREF_LOW:
|
||||
fprintf(fp, "low");
|
||||
break;
|
||||
case ICMPV6_ROUTER_PREF_MEDIUM:
|
||||
fprintf(fp, "medium");
|
||||
break;
|
||||
case ICMPV6_ROUTER_PREF_HIGH:
|
||||
fprintf(fp, "high");
|
||||
break;
|
||||
default:
|
||||
fprintf(fp, "%u", pref);
|
||||
}
|
||||
}
|
||||
fprintf(fp, "\n");
|
||||
fflush(fp);
|
||||
return 0;
|
||||
|
|
@ -854,7 +875,7 @@ static int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
|
|||
req.r.rtm_tos = tos;
|
||||
} else if (matches(*argv, "metric") == 0 ||
|
||||
matches(*argv, "priority") == 0 ||
|
||||
matches(*argv, "preference") == 0) {
|
||||
strcmp(*argv, "preference") == 0) {
|
||||
__u32 metric;
|
||||
NEXT_ARG();
|
||||
if (get_u32(&metric, *argv, 0))
|
||||
|
|
@ -1051,6 +1072,18 @@ static int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
|
|||
strcmp(*argv, "oif") == 0) {
|
||||
NEXT_ARG();
|
||||
d = *argv;
|
||||
} else if (matches(*argv, "pref") == 0) {
|
||||
__u8 pref;
|
||||
NEXT_ARG();
|
||||
if (strcmp(*argv, "low") == 0)
|
||||
pref = ICMPV6_ROUTER_PREF_LOW;
|
||||
else if (strcmp(*argv, "medium") == 0)
|
||||
pref = ICMPV6_ROUTER_PREF_MEDIUM;
|
||||
else if (strcmp(*argv, "high") == 0)
|
||||
pref = ICMPV6_ROUTER_PREF_HIGH;
|
||||
else if (get_u8(&pref, *argv, 0))
|
||||
invarg("\"pref\" value is invalid\n", *argv);
|
||||
addattr8(&req.n, sizeof(req), RTA_PREF, pref);
|
||||
} else {
|
||||
int type;
|
||||
inet_prefix dst;
|
||||
|
|
|
|||
|
|
@ -129,6 +129,8 @@ replace " } "
|
|||
.IR BOOL " ] [ "
|
||||
.B congctl
|
||||
.IR NAME " ]"
|
||||
.B pref
|
||||
.IR PREF " ]"
|
||||
|
||||
.ti -8
|
||||
.IR TYPE " := [ "
|
||||
|
|
@ -158,6 +160,10 @@ throw " | " unreachable " | " prohibit " | " blackhole " | " nat " ]"
|
|||
.IR FEATURES " := [ "
|
||||
.BR ecn " | ]"
|
||||
|
||||
.ti -8
|
||||
.IR PREF " := [ "
|
||||
.BR low " | " medium " | " high " ]"
|
||||
|
||||
|
||||
.SH DESCRIPTION
|
||||
.B ip route
|
||||
|
|
@ -562,6 +568,28 @@ to assign (or not to assign) protocol tags.
|
|||
.B onlink
|
||||
pretend that the nexthop is directly attached to this link,
|
||||
even if it does not match any interface prefix.
|
||||
|
||||
.TP
|
||||
.BI pref " PREF"
|
||||
the IPv6 route preference.
|
||||
.I PREF
|
||||
is a string specifying the route preference as defined in RFC4191 for Router
|
||||
Discovery messages. Namely:
|
||||
|
||||
.in +8
|
||||
.B low
|
||||
- the route has a lowest priority
|
||||
.sp
|
||||
|
||||
.B medium
|
||||
- the route has a default priority
|
||||
.sp
|
||||
|
||||
.B high
|
||||
- the route has a highest priority
|
||||
.sp
|
||||
|
||||
.in -8
|
||||
.RE
|
||||
|
||||
.TP
|
||||
|
|
|
|||
Loading…
Reference in New Issue