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22a59be8b7
In the presence of firewalls which improperly block ICMP Unreachable
(including Fragmentation Required) messages, Path MTU Discovery is
prevented from working.
A workaround is to handle IPv4 payloads opaquely, ignoring the DF bit--as
is done for other payloads like AppleTalk--and doing transparent
fragmentation and reassembly.
Redux includes the enforcement of mutual exclusion between this feature
and Path MTU Discovery as suggested by Alexander Duyck.
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
137 lines
2.9 KiB
C
137 lines
2.9 KiB
C
#ifndef _UAPI_IF_TUNNEL_H_
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#define _UAPI_IF_TUNNEL_H_
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0)
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#define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
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#define SIOCDELTUNNEL (SIOCDEVPRIVATE + 2)
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#define SIOCCHGTUNNEL (SIOCDEVPRIVATE + 3)
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#define SIOCGETPRL (SIOCDEVPRIVATE + 4)
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#define SIOCADDPRL (SIOCDEVPRIVATE + 5)
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#define SIOCDELPRL (SIOCDEVPRIVATE + 6)
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#define SIOCCHGPRL (SIOCDEVPRIVATE + 7)
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#define SIOCGET6RD (SIOCDEVPRIVATE + 8)
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#define SIOCADD6RD (SIOCDEVPRIVATE + 9)
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#define SIOCDEL6RD (SIOCDEVPRIVATE + 10)
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#define SIOCCHG6RD (SIOCDEVPRIVATE + 11)
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#define GRE_CSUM __cpu_to_be16(0x8000)
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#define GRE_ROUTING __cpu_to_be16(0x4000)
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#define GRE_KEY __cpu_to_be16(0x2000)
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#define GRE_SEQ __cpu_to_be16(0x1000)
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#define GRE_STRICT __cpu_to_be16(0x0800)
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#define GRE_REC __cpu_to_be16(0x0700)
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#define GRE_FLAGS __cpu_to_be16(0x00F8)
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#define GRE_VERSION __cpu_to_be16(0x0007)
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struct ip_tunnel_parm {
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char name[IFNAMSIZ];
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int link;
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__be16 i_flags;
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__be16 o_flags;
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__be32 i_key;
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__be32 o_key;
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struct iphdr iph;
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};
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enum {
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IFLA_IPTUN_UNSPEC,
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IFLA_IPTUN_LINK,
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IFLA_IPTUN_LOCAL,
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IFLA_IPTUN_REMOTE,
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IFLA_IPTUN_TTL,
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IFLA_IPTUN_TOS,
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IFLA_IPTUN_ENCAP_LIMIT,
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IFLA_IPTUN_FLOWINFO,
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IFLA_IPTUN_FLAGS,
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IFLA_IPTUN_PROTO,
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IFLA_IPTUN_PMTUDISC,
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IFLA_IPTUN_6RD_PREFIX,
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IFLA_IPTUN_6RD_RELAY_PREFIX,
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IFLA_IPTUN_6RD_PREFIXLEN,
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IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
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IFLA_IPTUN_ENCAP_TYPE,
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IFLA_IPTUN_ENCAP_FLAGS,
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IFLA_IPTUN_ENCAP_SPORT,
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IFLA_IPTUN_ENCAP_DPORT,
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__IFLA_IPTUN_MAX,
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};
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#define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
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enum tunnel_encap_types {
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TUNNEL_ENCAP_NONE,
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TUNNEL_ENCAP_FOU,
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TUNNEL_ENCAP_GUE,
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};
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#define TUNNEL_ENCAP_FLAG_CSUM (1<<0)
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#define TUNNEL_ENCAP_FLAG_CSUM6 (1<<1)
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#define TUNNEL_ENCAP_FLAG_REMCSUM (1<<2)
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/* SIT-mode i_flags */
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#define SIT_ISATAP 0x0001
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struct ip_tunnel_prl {
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__be32 addr;
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__u16 flags;
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__u16 __reserved;
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__u32 datalen;
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__u32 __reserved2;
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/* data follows */
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};
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/* PRL flags */
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#define PRL_DEFAULT 0x0001
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struct ip_tunnel_6rd {
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struct in6_addr prefix;
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__be32 relay_prefix;
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__u16 prefixlen;
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__u16 relay_prefixlen;
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};
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enum {
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IFLA_GRE_UNSPEC,
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IFLA_GRE_LINK,
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IFLA_GRE_IFLAGS,
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IFLA_GRE_OFLAGS,
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IFLA_GRE_IKEY,
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IFLA_GRE_OKEY,
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IFLA_GRE_LOCAL,
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IFLA_GRE_REMOTE,
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IFLA_GRE_TTL,
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IFLA_GRE_TOS,
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IFLA_GRE_PMTUDISC,
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IFLA_GRE_ENCAP_LIMIT,
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IFLA_GRE_FLOWINFO,
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IFLA_GRE_FLAGS,
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IFLA_GRE_ENCAP_TYPE,
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IFLA_GRE_ENCAP_FLAGS,
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IFLA_GRE_ENCAP_SPORT,
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IFLA_GRE_ENCAP_DPORT,
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IFLA_GRE_COLLECT_METADATA,
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IFLA_GRE_IGNORE_DF,
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__IFLA_GRE_MAX,
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};
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#define IFLA_GRE_MAX (__IFLA_GRE_MAX - 1)
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/* VTI-mode i_flags */
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#define VTI_ISVTI ((__force __be16)0x0001)
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enum {
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IFLA_VTI_UNSPEC,
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IFLA_VTI_LINK,
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IFLA_VTI_IKEY,
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IFLA_VTI_OKEY,
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IFLA_VTI_LOCAL,
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IFLA_VTI_REMOTE,
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__IFLA_VTI_MAX,
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};
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#define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
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#endif /* _UAPI_IF_TUNNEL_H_ */
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