From 5d26a6607fc53f416e42dccbc3fcda5d9b142625 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Sat, 15 Sep 2007 10:48:25 +0200
Subject: [PATCH] netlink plugin: Fix build issues under Debian Sarge

or generally older Linux versions.
---
 ChangeLog     |  2 ++
 configure.in  | 37 +++++++++++++++++++++++++++++++++++++
 src/netlink.c | 46 +++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 80 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 66d339da..3f16c8ef 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 yyyy-mm-dd, Version 4.1.2
 	* apcups plugin: Fix reporting of the `load percent' data.
+	* netlink plugin: Build issues under some older versions of the Linux
+	  includes (i. e. Debian Sarge) have been fixed.
 
 2007-09-12, Version 4.1.1
 	* Build system: The detection of `libnetlink' has been improved.
diff --git a/configure.in b/configure.in
index 38373ac0..44d7cfcc 100644
--- a/configure.in
+++ b/configure.in
@@ -1438,6 +1438,43 @@ then
 #include <sys/socket.h>
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>])
+	AC_CHECK_HEADERS(linux/gen_stats.h linux/pkt_sched.h, [], [],
+[#include <stdio.h>
+#include <sys/types.h>
+#include <asm/types.h>
+#include <sys/socket.h>])
+
+	AC_COMPILE_IFELSE(
+[#include <stdio.h>
+#include <sys/types.h>
+#include <asm/types.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+int main (void)
+{
+	int retval = TCA_STATS2;
+	return (retval);
+}],
+	[AC_DEFINE([HAVE_TCA_STATS2], 1, [True if the enum-member TCA_STATS2 exists])]
+	[]);
+
+	AC_COMPILE_IFELSE(
+[#include <stdio.h>
+#include <sys/types.h>
+#include <asm/types.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+int main (void)
+{
+	int retval = TCA_STATS;
+	return (retval);
+}],
+	[AC_DEFINE([HAVE_TCA_STATS], 1, [True if the enum-member TCA_STATS exists])]
+	[]);
 
 	CFLAGS="$SAVE_CFLAGS"
 fi
diff --git a/src/netlink.c b/src/netlink.c
index 073efe9e..8c883f67 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -25,9 +25,15 @@
 
 #include <asm/types.h>
 #include <sys/socket.h>
+
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
-#include <linux/gen_stats.h>
+#if HAVE_LINUX_GEN_STATS_H
+# include <linux/gen_stats.h>
+#endif
+#if HAVE_LINUX_PKT_SCHED_H
+# include <linux/pkt_sched.h>
+#endif
 
 #if HAVE_LIBNETLINK_H
 # include <libnetlink.h>
@@ -198,8 +204,8 @@ static void submit_two (const char *dev, const char *type,
   plugin_dispatch_values (type, &vl);
 } /* void submit_two */
 
-static int link_filter (const struct sockaddr_nl *sa, struct nlmsghdr *nmh,
-    void *args)
+static int link_filter (const struct sockaddr_nl *sa,
+    const struct nlmsghdr *nmh, void *args)
 {
   struct ifinfomsg *msg;
   int msg_len;
@@ -305,8 +311,8 @@ static int link_filter (const struct sockaddr_nl *sa, struct nlmsghdr *nmh,
   return (0);
 } /* int link_filter */
 
-static int qos_filter (const struct sockaddr_nl *sa, struct nlmsghdr *nmh,
-    void *args)
+static int qos_filter (const struct sockaddr_nl *sa,
+    const struct nlmsghdr *nmh, void *args)
 {
   struct tcmsg *msg;
   int msg_len;
@@ -399,6 +405,7 @@ static int qos_filter (const struct sockaddr_nl *sa, struct nlmsghdr *nmh,
   if (check_ignorelist (dev, tc_type, tc_inst))
     return (0);
 
+#if HAVE_TCA_STATS2
   if (attrs[TCA_STATS2])
   {
     struct rtattr *attrs_stats[TCA_STATS_MAX + 1];
@@ -423,6 +430,35 @@ static int qos_filter (const struct sockaddr_nl *sa, struct nlmsghdr *nmh,
       submit_one (dev, "ipt_packets", type_instance, bs.packets);
     }
   }
+#endif /* TCA_STATS2 */
+#if HAVE_TCA_STATS && HAVE_TCA_STATS2
+  else
+#endif
+#if HAVE_TCA_STATS
+  if (attrs[TCA_STATS] != NULL)
+  {
+    struct tc_stats ts;
+    char type_instance[DATA_MAX_NAME_LEN];
+
+    snprintf (type_instance, sizeof (type_instance), "%s-%s",
+	tc_type, tc_inst);
+    type_instance[sizeof (type_instance) - 1] = '\0';
+
+    memset(&ts, '\0', sizeof (ts));
+    memcpy(&ts, RTA_DATA (attrs[TCA_STATS]),
+	MIN (RTA_PAYLOAD (attrs[TCA_STATS]), sizeof (ts)));
+
+    submit_one (dev, "ipt_bytes", type_instance, ts.bytes);
+    submit_one (dev, "ipt_packets", type_instance, ts.packets);
+  }
+#endif /* TCA_STATS */
+#if HAVE_TCA_STATS || HAVE_TCA_STATS2
+  else
+#endif
+  {
+    DEBUG ("netlink plugin: qos_filter: Have neither TCA_STATS2 nor "
+	"TCA_STATS.");
+  }
 
   return (0);
 } /* int qos_filter */
-- 
2.30.2