From 4ee22cabea44c8e8031fb63d34df6f7b2c1be8af Mon Sep 17 00:00:00 2001
From: JingPiao Chen <chenjingpiao@gmail.com>
Date: Tue, 15 Aug 2017 12:41:13 +0800
Subject: [PATCH] netlink: add basic decoding of NETLINK_ROUTE fib_rule_hdr
attributes
* rtnl_rule.c: Include "nlattr.h" and "xlat/rtnl_rule_attrs.h".
(decode_fib_rule_hdr): Call decode_nlattr.
* xlat/rtnl_rule_attrs.in: New file.
Co-authored-by: Fabien Siron <fabien.siron@epita.fr>
---
rtnl_rule.c | 13 ++++++++++++-
xlat/rtnl_rule_attrs.in | 21 +++++++++++++++++++++
2 files changed, 33 insertions(+), 1 deletion(-)
create mode 100644 xlat/rtnl_rule_attrs.in
diff --git a/rtnl_rule.c b/rtnl_rule.c
index b3e6d526..5a1dd289 100644
--- a/rtnl_rule.c
+++ b/rtnl_rule.c
@@ -30,6 +30,7 @@
#include "defs.h"
#include "netlink_route.h"
+#include "nlattr.h"
#include "print_fields.h"
#include "netlink.h"
@@ -40,6 +41,7 @@
#include "xlat/fib_rule_actions.h"
#include "xlat/fib_rule_flags.h"
+#include "xlat/rtnl_rule_attrs.h"
DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr)
{
@@ -49,7 +51,8 @@ DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr)
* struct fib_rule_hdr.
*/
struct rtmsg msg = { .rtm_family = family };
- const size_t offset = sizeof(msg.rtm_family);
+ size_t offset = sizeof(msg.rtm_family);
+ bool decode_nla = false;
tprints("{family=");
printxval(addrfams, msg.rtm_family, "AF_???");
@@ -71,8 +74,16 @@ DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr)
tprints(", flags=");
printflags(fib_rule_flags, msg.rtm_flags,
"FIB_RULE_???");
+ decode_nla = true;
}
} else
tprints("...");
tprints("}");
+
+ offset = NLMSG_ALIGN(sizeof(msg));
+ if (decode_nla && len > offset) {
+ tprints(", ");
+ decode_nlattr(tcp, addr + offset, len - offset,
+ rtnl_rule_attrs, "FRA_???", NULL, 0, NULL);
+ }
}
diff --git a/xlat/rtnl_rule_attrs.in b/xlat/rtnl_rule_attrs.in
new file mode 100644
index 00000000..971f1180
--- /dev/null
+++ b/xlat/rtnl_rule_attrs.in
@@ -0,0 +1,21 @@
+FRA_UNSPEC 0
+FRA_DST 1
+FRA_SRC 2
+FRA_IIFNAME 3
+FRA_GOTO 4
+FRA_UNUSED2 5
+FRA_PRIORITY 6
+FRA_UNUSED3 7
+FRA_UNUSED4 8
+FRA_UNUSED5 9
+FRA_FWMARK 10
+FRA_FLOW 11
+FRA_TUN_ID 12
+FRA_SUPPRESS_IFGROUP 13
+FRA_SUPPRESS_PREFIXLEN 14
+FRA_TABLE 15
+FRA_FWMASK 16
+FRA_OIFNAME 17
+FRA_PAD 18
+FRA_L3MDEV 19
+FRA_UID_RANGE 20
--
2.40.0