[PATCH net] selftests: net: ip_local_port_range: define IPPROTO_MPTCP

[Maxim Galaganov]

Older glibc's netinet/in.h may leave IPPROTO_MPTCP undefined when
building ip_local_port_range.c, that leads to "error: use of undeclared
identifier 'IPPROTO_MPTCP'".

Define IPPROTO_MPTCP in such cases, just like in other MPTCP selftests.

Fixes: 122db5e3634b ("selftests/net: add MPTCP coverage for 
IP_LOCAL_PORT_RANGE")
Reported-by: Linux Kernel Functional Testing <l...@linaro.org>
Closes: 
https://lore.kernel.org/netdev/ca+g9fyvgo5q4o_td_kyqgyiexwkw6ktma-q0sbu6s-0y3w2...@mail.gmail.com/
Signed-off-by: Maxim Galaganov <m...@internet.ru>
---
 tools/testing/selftests/net/ip_local_port_range.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/net/ip_local_port_range.c 
b/tools/testing/selftests/net/ip_local_port_range.c
index 0f217a1cc837..6ebd58869a63 100644
--- a/tools/testing/selftests/net/ip_local_port_range.c
+++ b/tools/testing/selftests/net/ip_local_port_range.c
@@ -16,6 +16,10 @@
 #define IP_LOCAL_PORT_RANGE 51
 #endif
 
+#ifndef IPPROTO_MPTCP
+#define IPPROTO_MPTCP 262
+#endif
+
 static __u32 pack_port_range(__u16 lo, __u16 hi)
 {
        return (hi << 16) | (lo << 0);
-- 
2.43.0