From c7e6371bc4afe6d42700d3174a6c56cba5833844 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Fri, 19 Oct 2018 15:41:39 -0700 Subject: [PATCH] ip route: Add protocol, table id and device to dump request Add protocol, table id and device to dump request if set in filter. If kernel side filtering is supported it is used to reduce the amount of data sent to userspace. Older kernels do not parse attributes on a route dump request, so these are silently ignored and ip will do the filtering in userspace. Signed-off-by: David Ahern --- ip/iproute.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/ip/iproute.c b/ip/iproute.c index 3c0be0a96..5bffb9d88 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -1669,10 +1669,24 @@ static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn) static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen) { struct rtmsg *rtm = NLMSG_DATA(nlh); + int err; + rtm->rtm_protocol = filter.protocol; if (filter.cloned) rtm->rtm_flags |= RTM_F_CLONED; + if (filter.tb) { + err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb); + if (err) + return err; + } + + if (filter.oif) { + err = addattr32(nlh, reqlen, RTA_OIF, filter.oif); + if (err) + return err; + } + return 0; } -- 2.47.2