[git commit] networking/libiproute/iplink.c: fix support for older kernels

[Denys Vlasenko]

commit: https://git.busybox.net/busybox/commit/?id=8953429a8253176adda4dcfbed4738e55ee3b8ea
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

- The CAN netlink interface has been added in Linux v2.6.31 with only 3 options [1]:

  CAN_CTRLMODE_LOOPBACK    0x1  /* Loopback mode */
  CAN_CTRLMODE_LISTENONLY  0x2  /* Listen-only mode */
  CAN_CTRLMODE_3_SAMPLES   0x4  /* Triple sampling mode */

  So define the other options.

- IFLA_CAN_TERMINATION has been added in Linux 4.11 [2],
  define it for older kernels.

[1] https://github.com/torvalds/linux/blob/v2.6.31/include/linux/can/netlink.h#L80-L82
[2] https://github.com/torvalds/linux/commit/12a6075cabc0d9ffbc0366b44daa22f278606312

Signed-off-by: Thomas Devoogdt <thomas at devoogdt.com>
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
 networking/libiproute/iplink.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/networking/libiproute/iplink.c b/networking/libiproute/iplink.c
index 37ed114bc..67602a466 100644
--- a/networking/libiproute/iplink.c
+++ b/networking/libiproute/iplink.c
@@ -51,6 +51,27 @@ struct ifla_vlan_flags {
 };
 #endif
 
+#if ENABLE_FEATURE_IP_LINK_CAN
+# ifndef CAN_CTRLMODE_ONE_SHOT
+#  define CAN_CTRLMODE_ONE_SHOT         0x08 /* One-Shot mode */
+# endif
+# ifndef CAN_CTRLMODE_BERR_REPORTING
+#  define CAN_CTRLMODE_BERR_REPORTING	0x10 /* Bus-error reporting */
+# endif
+# ifndef CAN_CTRLMODE_FD
+#  define CAN_CTRLMODE_FD               0x20 /* CAN FD mode */
+# endif
+# ifndef CAN_CTRLMODE_PRESUME_ACK
+#  define CAN_CTRLMODE_PRESUME_ACK      0x40 /* Ignore missing CAN ACKs */
+# endif
+# ifndef CAN_CTRLMODE_FD_NON_ISO
+#  define CAN_CTRLMODE_FD_NON_ISO       0x80 /* CAN FD in non-ISO mode */
+# endif
+# ifndef IFLA_CAN_TERMINATION
+#  define IFLA_CAN_TERMINATION          11
+# endif
+#endif
+
 /* taken from linux/sockios.h */
 #define SIOCSIFNAME  0x8923  /* set interface name */