From 74829ca7dd603f25c5ecd22495ff5813cbdb60f0 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Fri, 7 Jun 2019 15:38:11 -0700 Subject: [PATCH] libnetlink: Add helper to create nexthop dump request Add rtnl_nexthopdump_req to initiate a dump request of nexthop objects. Signed-off-by: David Ahern --- include/libnetlink.h | 4 ++++ lib/libnetlink.c | 27 +++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/include/libnetlink.h b/include/libnetlink.h index 599b2c59..1ddba8dc 100644 --- a/include/libnetlink.h +++ b/include/libnetlink.h @@ -93,6 +93,10 @@ int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n) __attribute__((warn_unused_result)); +int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family, + req_filter_fn_t filter_fn) + __attribute__((warn_unused_result)); + struct rtnl_ctrl_data { int nsid; }; diff --git a/lib/libnetlink.c b/lib/libnetlink.c index eb85bbdf..af2a3bbf 100644 --- a/lib/libnetlink.c +++ b/lib/libnetlink.c @@ -25,6 +25,7 @@ #include #include #include +#include #include "libnetlink.h" @@ -252,6 +253,32 @@ int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions) return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE); } +int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family, + req_filter_fn_t filter_fn) +{ + struct { + struct nlmsghdr nlh; + struct nhmsg nhm; + char buf[128]; + } req = { + .nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)), + .nlh.nlmsg_type = RTM_GETNEXTHOP, + .nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST, + .nlh.nlmsg_seq = rth->dump = ++rth->seq, + .nhm.nh_family = family, + }; + + if (filter_fn) { + int err; + + err = filter_fn(&req.nlh, sizeof(req)); + if (err) + return err; + } + + return send(rth->fd, &req, sizeof(req), 0); +} + int rtnl_addrdump_req(struct rtnl_handle *rth, int family, req_filter_fn_t filter_fn) { -- 2.39.2