netdev - [PATCH iproute2-next 5/9] libnetlink: Add helper to create nexthop dump request

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190530031746.2040-6-dsahern@kernel.org>
Date:   Wed, 29 May 2019 20:17:42 -0700
From:   David Ahern <dsahern@...nel.org>
To:     stephen@...workplumber.org
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...il.com>
Subject: [PATCH iproute2-next 5/9] libnetlink: Add helper to create nexthop dump request

From: David Ahern <dsahern@...il.com>

Add rtnl_nexthopdump_req to initiate a dump request of nexthop objects.

Signed-off-by: David Ahern <dsahern@...il.com>
---
 include/libnetlink.h |  4 ++++
 lib/libnetlink.c     | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/include/libnetlink.h b/include/libnetlink.h
index 599b2c592f68..1ddba8dcd220 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 eb85bbdf01ee..c1cdda3b8d4e 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -25,6 +25,7 @@
 #include <linux/fib_rules.h>
 #include <linux/if_addrlabel.h>
 #include <linux/if_bridge.h>
+#include <linux/nexthop.h>
 
 #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 ifaddrmsg)),
+		.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)
 {
-- 
2.11.0