ipv4: IP_TOS and IP_TTL can be specified as ancillary data
This patch enables the IP_TTL and IP_TOS values passed from userspace to
be stored in the ipcm_cookie struct. Three fields are added to the struct:
- the TTL, expressed as __u8.
The allowed values are in the [1-255].
A value of 0 means that the TTL is not specified.
- the TOS, expressed as __s16.
The allowed values are in the range [0,255].
A value of -1 means that the TOS is not specified.
- the priority, expressed as a char and computed when
handling the ancillary data.
Signed-off-by: Francesco Fusco <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/include/net/ip.h b/include/net/ip.h
index c1f192b..0135f38 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -56,6 +56,9 @@
int oif;
struct ip_options_rcu *opt;
__u8 tx_flags;
+ __u8 ttl;
+ __s16 tos;
+ char priority;
};
#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
