[LTP] [RFC PATCH 2/2] lapi/if_addr.h: Define IFA_FLAGS

[Petr Vorel]

and use it in icmp_rate_limit01.c.

This fixes error on toolchains with very old kernel headers, e.g.
Buildroot sourcery-arm:

icmp_rate_limit01.c:82:3: error: 'IFA_F_NOPREFIXROUTE' undeclared (first use in this function)
   IFA_F_NOPREFIXROUTE);

Fixed because IFA_F_NOPREFIXROUTE was added in 3.14 and the oldest
system we still support is Cent0S 7 with 3.10 kernel.

NOTE: Cent0S 7 is obviously heavily patched thus it contains
IFA_F_NOPREFIXROUTE and therefore CI build didn't catch this error.

Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
---
 include/lapi/if_addr.h            | 4 ++++
 testcases/cve/icmp_rate_limit01.c | 3 ++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/lapi/if_addr.h b/include/lapi/if_addr.h
index 07e6a7c9b..0f7e44784 100644
--- a/include/lapi/if_addr.h
+++ b/include/lapi/if_addr.h
@@ -8,6 +8,10 @@
 
 #include <linux/if_addr.h>
 
+#ifndef IFA_FLAGS
+# define IFA_FLAGS 8
+#endif
+
 #ifndef IFA_F_NOPREFIXROUTE
 # define IFA_F_NOPREFIXROUTE	0x200
 #endif
diff --git a/testcases/cve/icmp_rate_limit01.c b/testcases/cve/icmp_rate_limit01.c
index b3a237b30..3ada32675 100644
--- a/testcases/cve/icmp_rate_limit01.c
+++ b/testcases/cve/icmp_rate_limit01.c
@@ -27,11 +27,12 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
-#include <linux/if_addr.h>
 #include <linux/errqueue.h>
 
 #include <sched.h>
 #include <limits.h>
+
+#include "lapi/if_addr.h"
 #include "tst_test.h"
 #include "tst_netdevice.h"
 
-- 
2.33.0