/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_GRE_H #define __LINUX_GRE_H #include <linux/skbuff.h> #include <net/ip_tunnels.h> struct gre_base_hdr { __be16 flags; __be16 protocol; } __packed; struct gre_full_hdr { struct gre_base_hdr fixed_header; __be16 csum; __be16 reserved1; __be32 key; __be32 seq; } __packed; #define GRE_HEADER_SECTION 4 #define GREPROTO_CISCO 0 #define GREPROTO_PPTP 1 #define GREPROTO_MAX 2 #define GRE_IP_PROTO_MAX 2 struct gre_protocol { int (*handler)(struct sk_buff *skb); void (*err_handler)(struct sk_buff *skb, u32 info); }; int gre_add_protocol(const struct gre_protocol *proto, u8 version); int gre_del_protocol(const struct gre_protocol *proto, u8 version); struct net_device *gretap_fb_dev_create(struct net *net, const char *name, u8 name_assign_type); int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, bool *csum_err, __be16 proto, int nhs); static inline int gre_calc_hlen(__be16 o_flags) { int addend = 4; if (o_flags & TUNNEL_CSUM) addend += 4; if (o_flags & TUNNEL_KEY) addend += 4; if (o_flags & TUNNEL_SEQ) addend += 4; return addend; } static inline __be16 gre_flags_to_tnl_flags(__be16 flags) { __be16 tflags = 0; if (flags & GRE_CSUM) tflags |= TUNNEL_CSUM; if (flags & GRE_ROUTING) tflags |= TUNNEL_ROUTING; if (flags & GRE_KEY) tflags |= TUNNEL_KEY; if (flags & GRE_SEQ) tflags |= TUNNEL_SEQ; if (flags & GRE_STRICT) tflags |= TUNNEL_STRICT; if (flags & GRE_REC) tflags |= TUNNEL_REC; if (flags & GRE_VERSION) tflags |= TUNNEL_VERSION; return tflags; } static inline __be16 gre_tnl_flags_to_gre_flags(__be16 tflags) { __be16 flags = 0; if (tflags & TUNNEL_CSUM) flags |= GRE_CSUM; if (tflags & TUNNEL_ROUTING) flags |= GRE_ROUTING; if (tflags & TUNNEL_KEY) flags |= GRE_KEY; if (tflags & TUNNEL_SEQ) flags |= GRE_SEQ; if (tflags & TUNNEL_STRICT) flags |= GRE_STRICT; if (tflags & TUNNEL_REC) flags |= GRE_REC; if (tflags & TUNNEL_VERSION) flags |= GRE_VERSION; return flags; } static inline __sum16 gre_checksum(struct sk_buff *skb) { __wsum csum; if (skb->ip_summed == CHECKSUM_PARTIAL) csum = lco_csum(skb); else csum = skb_checksum(skb, 0, skb->len, 0); return csum_fold(csum); } static inline void gre_build_header(struct sk_buff *skb, int hdr_len, __be16 flags, __be16 proto, __be32 key, __be32 seq) { struct gre_base_hdr *greh; skb_push(skb, hdr_len); skb_set_inner_protocol(skb, proto); skb_reset_transport_header(skb); greh = (struct gre_base_hdr *)skb->data; greh->flags = gre_tnl_flags_to_gre_flags(flags); greh->protocol = proto; if (flags & (TUNNEL_KEY | TUNNEL_CSUM | TUNNEL_SEQ)) { __be32 *ptr = (__be32 *)(((u8 *)greh) + hdr_len - 4); if (flags & TUNNEL_SEQ) { *ptr = seq; ptr--; } if (flags & TUNNEL_KEY) { *ptr = key; ptr--; } if (flags & TUNNEL_CSUM && !(skb_shinfo(skb)->gso_type & (SKB_GSO_GRE | SKB_GSO_GRE_CSUM))) { *ptr = 0; *(__sum16 *)ptr = gre_checksum(skb); } } } #endif
Name | Type | Size | Permission | Actions |
---|---|---|---|---|
9p | Folder | 0755 |
|
|
bluetooth | Folder | 0755 |
|
|
caif | Folder | 0755 |
|
|
iucv | Folder | 0755 |
|
|
netfilter | Folder | 0755 |
|
|
netns | Folder | 0755 |
|
|
nfc | Folder | 0755 |
|
|
phonet | Folder | 0755 |
|
|
sctp | Folder | 0755 |
|
|
tc_act | Folder | 0755 |
|
|
6lowpan.h | File | 10.03 KB | 0644 |
|
Space.h | File | 1.15 KB | 0644 |
|
act_api.h | File | 6.38 KB | 0644 |
|
addrconf.h | File | 12.63 KB | 0644 |
|
af_ieee802154.h | File | 1.55 KB | 0644 |
|
af_rxrpc.h | File | 2.79 KB | 0644 |
|
af_unix.h | File | 2.22 KB | 0644 |
|
af_vsock.h | File | 7.21 KB | 0644 |
|
ah.h | File | 382 B | 0644 |
|
arp.h | File | 2 KB | 0644 |
|
atmclip.h | File | 1.48 KB | 0644 |
|
ax25.h | File | 15.02 KB | 0644 |
|
ax88796.h | File | 998 B | 0644 |
|
bond_3ad.h | File | 9.79 KB | 0644 |
|
bond_alb.h | File | 6.6 KB | 0644 |
|
bond_options.h | File | 3.92 KB | 0644 |
|
bonding.h | File | 19.1 KB | 0644 |
|
busy_poll.h | File | 3.8 KB | 0644 |
|
calipso.h | File | 2.15 KB | 0644 |
|
cfg80211-wext.h | File | 1.95 KB | 0644 |
|
cfg80211.h | File | 221.24 KB | 0644 |
|
cfg802154.h | File | 10.89 KB | 0644 |
|
checksum.h | File | 4.76 KB | 0644 |
|
cipso_ipv4.h | File | 8.2 KB | 0644 |
|
cls_cgroup.h | File | 2.15 KB | 0644 |
|
codel.h | File | 5.65 KB | 0644 |
|
codel_impl.h | File | 7.98 KB | 0644 |
|
codel_qdisc.h | File | 2.9 KB | 0644 |
|
compat.h | File | 2.11 KB | 0644 |
|
datalink.h | File | 619 B | 0644 |
|
dcbevent.h | File | 1.26 KB | 0644 |
|
dcbnl.h | File | 4.2 KB | 0644 |
|
devlink.h | File | 13.25 KB | 0644 |
|
dn.h | File | 6.88 KB | 0644 |
|
dn_dev.h | File | 5.36 KB | 0644 |
|
dn_fib.h | File | 3.98 KB | 0644 |
|
dn_neigh.h | File | 968 B | 0644 |
|
dn_nsp.h | File | 5.83 KB | 0644 |
|
dn_route.h | File | 4.36 KB | 0644 |
|
dsa.h | File | 13.94 KB | 0644 |
|
dsfield.h | File | 1.11 KB | 0644 |
|
dst.h | File | 13.48 KB | 0644 |
|
dst_cache.h | File | 2.53 KB | 0644 |
|
dst_metadata.h | File | 5.39 KB | 0644 |
|
dst_ops.h | File | 2 KB | 0644 |
|
erspan.h | File | 2.11 KB | 0644 |
|
esp.h | File | 877 B | 0644 |
|
ethoc.h | File | 538 B | 0644 |
|
fib_notifier.h | File | 1.29 KB | 0644 |
|
fib_rules.h | File | 4.18 KB | 0644 |
|
firewire.h | File | 636 B | 0644 |
|
flow.h | File | 6.16 KB | 0644 |
|
flow_dissector.h | File | 7.55 KB | 0644 |
|
fou.h | File | 549 B | 0644 |
|
fq.h | File | 2.67 KB | 0644 |
|
fq_impl.h | File | 6.9 KB | 0644 |
|
garp.h | File | 2.62 KB | 0644 |
|
gen_stats.h | File | 2.34 KB | 0644 |
|
genetlink.h | File | 11.3 KB | 0644 |
|
geneve.h | File | 1.67 KB | 0644 |
|
gre.h | File | 2.99 KB | 0644 |
|
gro_cells.h | File | 443 B | 0644 |
|
gtp.h | File | 633 B | 0644 |
|
gue.h | File | 3.23 KB | 0644 |
|
hwbm.h | File | 937 B | 0644 |
|
icmp.h | File | 2.01 KB | 0644 |
|
ieee80211_radiotap.h | File | 6.63 KB | 0644 |
|
ieee802154_netdev.h | File | 9.14 KB | 0644 |
|
if_inet6.h | File | 6.13 KB | 0644 |
|
ife.h | File | 1.06 KB | 0644 |
|
ila.h | File | 498 B | 0644 |
|
inet6_connection_sock.h | File | 976 B | 0644 |
|
inet6_hashtables.h | File | 3.7 KB | 0644 |
|
inet_common.h | File | 1.89 KB | 0644 |
|
inet_connection_sock.h | File | 10.48 KB | 0644 |
|
inet_ecn.h | File | 6.02 KB | 0644 |
|
inet_frag.h | File | 4.51 KB | 0644 |
|
inet_hashtables.h | File | 12.91 KB | 0644 |
|
inet_sock.h | File | 8.25 KB | 0644 |
|
inet_timewait_sock.h | File | 3.82 KB | 0644 |
|
inetpeer.h | File | 3.29 KB | 0644 |
|
ip.h | File | 18.51 KB | 0644 |
|
ip6_checksum.h | File | 2.89 KB | 0644 |
|
ip6_fib.h | File | 10.04 KB | 0644 |
|
ip6_route.h | File | 7.63 KB | 0644 |
|
ip6_tunnel.h | File | 4.72 KB | 0644 |
|
ip_fib.h | File | 10.72 KB | 0644 |
|
ip_tunnels.h | File | 13.61 KB | 0644 |
|
ip_vs.h | File | 46.78 KB | 0644 |
|
ipcomp.h | File | 659 B | 0644 |
|
ipconfig.h | File | 811 B | 0644 |
|
ipv6.h | File | 29.97 KB | 0644 |
|
ipv6_frag.h | File | 2.54 KB | 0644 |
|
ipx.h | File | 4.4 KB | 0644 |
|
iw_handler.h | File | 20.91 KB | 0644 |
|
kcm.h | File | 4.96 KB | 0644 |
|
l3mdev.h | File | 5.86 KB | 0644 |
|
lapb.h | File | 4.75 KB | 0644 |
|
lib80211.h | File | 3.92 KB | 0644 |
|
llc.h | File | 4.41 KB | 0644 |
|
llc_c_ac.h | File | 9.31 KB | 0644 |
|
llc_c_ev.h | File | 10.68 KB | 0644 |
|
llc_c_st.h | File | 1.72 KB | 0644 |
|
llc_conn.h | File | 4.06 KB | 0644 |
|
llc_if.h | File | 2.16 KB | 0644 |
|
llc_pdu.h | File | 14.44 KB | 0644 |
|
llc_s_ac.h | File | 1.55 KB | 0644 |
|
llc_s_ev.h | File | 2.2 KB | 0644 |
|
llc_s_st.h | File | 947 B | 0644 |
|
llc_sap.h | File | 1.08 KB | 0644 |
|
lwtunnel.h | File | 5.84 KB | 0644 |
|
mac80211.h | File | 230.36 KB | 0644 |
|
mac802154.h | File | 15.27 KB | 0644 |
|
mip6.h | File | 1.58 KB | 0644 |
|
mld.h | File | 2.8 KB | 0644 |
|
mpls.h | File | 932 B | 0644 |
|
mpls_iptunnel.h | File | 827 B | 0644 |
|
mrp.h | File | 3.03 KB | 0644 |
|
ncsi.h | File | 1.92 KB | 0644 |
|
ndisc.h | File | 13.77 KB | 0644 |
|
neighbour.h | File | 15.06 KB | 0644 |
|
net_namespace.h | File | 10.08 KB | 0644 |
|
net_ratelimit.h | File | 220 B | 0644 |
|
netevent.h | File | 910 B | 0644 |
|
netlabel.h | File | 20.74 KB | 0644 |
|
netlink.h | File | 40.39 KB | 0644 |
|
netprio_cgroup.h | File | 1.24 KB | 0644 |
|
netrom.h | File | 7.68 KB | 0644 |
|
nexthop.h | File | 865 B | 0644 |
|
nl802154.h | File | 12.09 KB | 0644 |
|
nsh.h | File | 12.31 KB | 0644 |
|
p8022.h | File | 447 B | 0644 |
|
ping.h | File | 3.45 KB | 0644 |
|
pkt_cls.h | File | 17.34 KB | 0644 |
|
pkt_sched.h | File | 4.05 KB | 0644 |
|
pptp.h | File | 557 B | 0644 |
|
protocol.h | File | 4.08 KB | 0644 |
|
psample.h | File | 860 B | 0644 |
|
psnap.h | File | 351 B | 0644 |
|
raw.h | File | 2.07 KB | 0644 |
|
rawv6.h | File | 854 B | 0644 |
|
red.h | File | 10.45 KB | 0644 |
|
regulatory.h | File | 10.12 KB | 0644 |
|
request_sock.h | File | 6.46 KB | 0644 |
|
rose.h | File | 7.62 KB | 0644 |
|
route.h | File | 10.02 KB | 0644 |
|
rtnetlink.h | File | 6.13 KB | 0644 |
|
sch_generic.h | File | 23.3 KB | 0644 |
|
scm.h | File | 3.5 KB | 0644 |
|
secure_seq.h | File | 855 B | 0644 |
|
seg6.h | File | 1.66 KB | 0644 |
|
seg6_hmac.h | File | 1.65 KB | 0644 |
|
slhc_vj.h | File | 6.67 KB | 0644 |
|
smc.h | File | 440 B | 0644 |
|
snmp.h | File | 5.23 KB | 0644 |
|
sock.h | File | 69.75 KB | 0644 |
|
sock_reuseport.h | File | 863 B | 0644 |
|
stp.h | File | 383 B | 0644 |
|
strparser.h | File | 3.75 KB | 0644 |
|
switchdev.h | File | 6.52 KB | 0644 |
|
tcp.h | File | 62.8 KB | 0644 |
|
tcp_states.h | File | 1.26 KB | 0644 |
|
timewait_sock.h | File | 1.11 KB | 0644 |
|
tipc.h | File | 2.34 KB | 0644 |
|
tls.h | File | 7.12 KB | 0644 |
|
transp_v6.h | File | 2.08 KB | 0644 |
|
tso.h | File | 515 B | 0644 |
|
tun_proto.h | File | 988 B | 0644 |
|
udp.h | File | 12.82 KB | 0644 |
|
udp_tunnel.h | File | 5.12 KB | 0644 |
|
udplite.h | File | 3.83 KB | 0644 |
|
vsock_addr.h | File | 1.05 KB | 0644 |
|
vxlan.h | File | 10.43 KB | 0644 |
|
wext.h | File | 1.51 KB | 0644 |
|
wimax.h | File | 19.97 KB | 0644 |
|
x25.h | File | 9.43 KB | 0644 |
|
x25device.h | File | 387 B | 0644 |
|
xfrm.h | File | 53.72 KB | 0644 |
|