diff options
| author |   Dave Taht <dave.taht@gmail.com> | 2018-12-11 15:30:34 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-12-14 15:39:31 -0800 |
| commit | 65cab850f0eeaa9180bd2e10a231964f33743edf (patch) | |
| tree | 4961b7fab35dd56eed20a01ee338e3cfd1bed7a4 /include | |
| parent | ip6mr: Fix potential Spectre v1 vulnerability (diff) | |
| download | linux-dev-65cab850f0eeaa9180bd2e10a231964f33743edf.tar.xz linux-dev-65cab850f0eeaa9180bd2e10a231964f33743edf.zip | |
net: Allow class-e address assignment via ifconfig ioctl
While most distributions long ago switched to the iproute2 suite
of utilities, which allow class-e (240.0.0.0/4) address assignment,
distributions relying on busybox, toybox and other forms of
ifconfig cannot assign class-e addresses without this kernel patch.
While CIDR has been obsolete for 2 decades, and a survey of all the
open source code in the world shows the IN_whatever macros are also
obsolete... rather than obsolete CIDR from this ioctl entirely, this
patch merely enables class-e assignment, sanely.
Signed-off-by: Dave Taht <dave.taht@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/in.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h index 48e8a225b985..f6052e70bf40 100644 --- a/include/uapi/linux/in.h +++ b/include/uapi/linux/in.h @@ -266,10 +266,14 @@ struct sockaddr_in { #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000) #define IN_MULTICAST(a) IN_CLASSD(a) -#define IN_MULTICAST_NET 0xF0000000 +#define IN_MULTICAST_NET 0xe0000000 -#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) -#define IN_BADCLASS(a) IN_EXPERIMENTAL((a)) +#define IN_BADCLASS(a) ((((long int) (a) ) == 0xffffffff) +#define IN_EXPERIMENTAL(a) IN_BADCLASS((a)) + +#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000) +#define IN_CLASSE_NET 0xffffffff +#define IN_CLASSE_NSHIFT 0 /* Address to accept any incoming messages. */ #define INADDR_ANY ((unsigned long int) 0x00000000) |