Hello!
As reported in http://bugs.debian.org/575970 there is currently a warning
printed for every tunnel when using latest iproute2 on atleast <= 2.6.32
kernels (missing 6rd?!).
The attached patch avoids perror when errno is EINVAL, which I assume
is the way to detect missing 6rd support. A better/cleaner
method to detect and avoid 6rd when there's no kernel support
is more then welcome.
Regards,
Andreas Henriksson
diff --git a/ip/tunnel.c b/ip/tunnel.c
index d389e86..bbb60bf 100644
--- a/ip/tunnel.c
+++ b/ip/tunnel.c
@@ -29,6 +29,7 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
+#include <errno.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <linux/ip.h>
@@ -168,7 +169,7 @@ int tnl_del_ioctl(const char *basedev, const char *name,
void *p)
return err;
}
-static int tnl_gen_ioctl(int cmd, const char *name, void *p)
+static int tnl_gen_ioctl(int cmd, const char *name, void *p, int quiet)
{
struct ifreq ifr;
int fd;
@@ -178,7 +179,7 @@ static int tnl_gen_ioctl(int cmd, const char *name, void *p)
ifr.ifr_ifru.ifru_data = p;
fd = socket(preferred_family, SOCK_DGRAM, 0);
err = ioctl(fd, cmd, &ifr);
- if (err)
+ if (err && !quiet)
perror("ioctl");
close(fd);
return err;
@@ -186,15 +187,18 @@ static int tnl_gen_ioctl(int cmd, const char *name, void
*p)
int tnl_prl_ioctl(int cmd, const char *name, void *p)
{
- return tnl_gen_ioctl(cmd, name, p);
+ return tnl_gen_ioctl(cmd, name, p, 0);
}
int tnl_6rd_ioctl(int cmd, const char *name, void *p)
{
- return tnl_gen_ioctl(cmd, name, p);
+ return tnl_gen_ioctl(cmd, name, p, 0);
}
int tnl_ioctl_get_6rd(const char *name, void *p)
{
- return tnl_gen_ioctl(SIOCGET6RD, name, p);
+ int err = tnl_gen_ioctl(SIOCGET6RD, name, p, 1);
+ if (err && errno != EINVAL)
+ perror("ioctl");
+ return err;
}
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