040468a0a7
A GRE tunnel can be configured so that outgoing tunnel packets inherit the value of the TOS field from the inner IP header. In doing so, when a non-IP packet is transmitted through the tunnel, the TOS field will always be set to 0. Instead, the user should be able to configure a different TOS value as the fallback to use for non-IP packets. This is helpful when the non-IP packets are all control packets and should be handled by routers outside the tunnel as having Internet Control precedence. One example of this is the NHRP packets that control a DMVPN-compatible mGRE tunnel; they are encapsulated directly by GRE and do not contain an inner IP header. Under the existing behavior, the IFLA_GRE_TOS parameter must be set to '1' for the TOS value to be inherited. Now, only the least significant bit of this parameter must be set to '1', and when a non-IP packet is sent through the tunnel, the upper 6 bits of this same parameter will be copied into the TOS field. (The ECN bits get masked off as before.) This behavior is backwards-compatible with existing configurations and iproute2 versions. Signed-off-by: David Ward <david.ward@ll.mit.edu> Signed-off-by: David S. Miller <davem@davemloft.net> |
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.. | ||
netfilter | ||
af_inet.c | ||
ah4.c | ||
arp.c | ||
cipso_ipv4.c | ||
datagram.c | ||
devinet.c | ||
esp4.c | ||
fib_frontend.c | ||
fib_lookup.h | ||
fib_rules.c | ||
fib_semantics.c | ||
fib_trie.c | ||
gre.c | ||
icmp.c | ||
igmp.c | ||
inet_connection_sock.c | ||
inet_diag.c | ||
inet_fragment.c | ||
inet_hashtables.c | ||
inet_lro.c | ||
inet_timewait_sock.c | ||
inetpeer.c | ||
ip_forward.c | ||
ip_fragment.c | ||
ip_gre.c | ||
ip_input.c | ||
ip_options.c | ||
ip_output.c | ||
ip_sockglue.c | ||
ip_vti.c | ||
ipcomp.c | ||
ipconfig.c | ||
ipip.c | ||
ipmr.c | ||
Kconfig | ||
Makefile | ||
netfilter.c | ||
ping.c | ||
proc.c | ||
protocol.c | ||
raw.c | ||
route.c | ||
syncookies.c | ||
sysctl_net_ipv4.c | ||
tcp.c | ||
tcp_bic.c | ||
tcp_cong.c | ||
tcp_cubic.c | ||
tcp_diag.c | ||
tcp_fastopen.c | ||
tcp_highspeed.c | ||
tcp_htcp.c | ||
tcp_hybla.c | ||
tcp_illinois.c | ||
tcp_input.c | ||
tcp_ipv4.c | ||
tcp_lp.c | ||
tcp_memcontrol.c | ||
tcp_metrics.c | ||
tcp_minisocks.c | ||
tcp_output.c | ||
tcp_probe.c | ||
tcp_scalable.c | ||
tcp_timer.c | ||
tcp_vegas.c | ||
tcp_vegas.h | ||
tcp_veno.c | ||
tcp_westwood.c | ||
tcp_yeah.c | ||
tunnel4.c | ||
udp.c | ||
udp_diag.c | ||
udp_impl.h | ||
udplite.c | ||
xfrm4_input.c | ||
xfrm4_mode_beet.c | ||
xfrm4_mode_transport.c | ||
xfrm4_mode_tunnel.c | ||
xfrm4_output.c | ||
xfrm4_policy.c | ||
xfrm4_state.c | ||
xfrm4_tunnel.c |