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sys/linux: add descriptions for IP tunnels

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Add descriptions related to IPv4/v6 tunnels
(include/uapi/linux/if_tunnel.h).
Descriptions of netlink actions are not included in this commit.
Update #533.
This commit is contained in:
Cheng-Min Chiang 2020-07-06 16:42:48 -07:00 committed by Matt Morehouse
parent 146a394c19
commit 18d18b591b
9 changed files with 355 additions and 0 deletions
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75
sys/linux/socket_ip_tunnel.txt Normal file
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# Copyright 2020 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
include <uapi/linux/if_tunnel.h>
include <uapi/linux/ip6_tunnel.h>
include <uapi/linux/if.h>
include <uapi/linux/in.h>
include <uapi/linux/ip.h>
include <net/ip.h>
# Fallback tunnels and placeholder names "syztnl*".
ipv4_tunnel_names = "ip_vti0", "tunl0", "gre0", "gretap0", "erspan0", "syztnl0", "syztnl1", "syztnl2"
ipv6_tunnel_names = "ip6tnl0", "ip6_vti0", "ip6gre0", "sit0", "syztnl0", "syztnl1", "syztnl2"
ip_tunnel_protocols = IPPROTO_IPIP, IPPROTO_GRE, IPPROTO_IPV6
ip_tunnel_io_flags = GRE_CSUM, GRE_ROUTING, GRE_KEY, GRE_SEQ, GRE_STRICT, GRE_REC, GRE_ACK, GRE_FLAGS, GRE_VERSION, VTI_ISVTI
type ipv4_header_only ipv4_packet_t[flags[ip_tunnel_protocols, int8], void]
# IPv4 tunnel parameters
ip_tunnel_parm {
name string[ipv4_tunnel_names, IFNAMSIZ]
link ifindex
i_flags flags[ip_tunnel_io_flags, int16be]
o_flags flags[ip_tunnel_io_flags, int16be]
i_key int32be
o_key int32be
iph ipv4_header_only
}
ipv6_tunnel_flags = IP6_TNL_F_IGN_ENCAP_LIMIT, IP6_TNL_F_USE_ORIG_TCLASS, IP6_TNL_F_USE_ORIG_FLOWLABEL, IP6_TNL_F_MIP6_DEV, IP6_TNL_F_RCV_DSCP_COPY, IP6_TNL_F_USE_ORIG_FWMARK, IP6_TNL_F_ALLOW_LOCAL_REMOTE
# IPv6 tunnel parameters
ip6_tnl_parm2 {
name string[ipv6_tunnel_names, IFNAMSIZ]
link ifindex
proto flags[ip_tunnel_protocols, int8]
encap_limit int8
hop_limit int8
flowinfo int32be
flags flags[ipv6_tunnel_flags, int32]
laddr ipv6_addr
raddr ipv6_addr
i_flags flags[ip_tunnel_io_flags, int16be]
o_flags flags[ip_tunnel_io_flags, int16be]
i_key int32be
o_key int32be
}
type ifreq_ipv4_tunnel ifreq_dev_t[ipv4_tunnel_names, ptr[inout, ip_tunnel_parm]]
type ifreq_ipv6_tunnel ifreq_dev_t[ipv6_tunnel_names, ptr[inout, ip6_tnl_parm2]]
# Repeat IP tunnel syscall variants here until #1913 is resolved.
# IPv4 ioctls
ioctl$sock_ipv4_tunnel_SIOCGETTUNNEL(fd sock_udp, cmd const[SIOCGETTUNNEL], arg ptr[inout, ifreq_ipv4_tunnel])
ioctl$sock_ipv4_tunnel_SIOCADDTUNNEL(fd sock_udp, cmd const[SIOCADDTUNNEL], arg ptr[inout, ifreq_ipv4_tunnel])
ioctl$sock_ipv4_tunnel_SIOCDELTUNNEL(fd sock_udp, cmd const[SIOCDELTUNNEL], arg ptr[inout, ifreq_ipv4_tunnel])
ioctl$sock_ipv4_tunnel_SIOCCHGTUNNEL(fd sock_udp, cmd const[SIOCCHGTUNNEL], arg ptr[inout, ifreq_ipv4_tunnel])
# IPv6 ioctls
# SIOC***TUNNEL
ioctl$sock_ipv6_tunnel_SIOCGETTUNNEL(fd sock_udp6, cmd const[SIOCGETTUNNEL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCADDTUNNEL(fd sock_udp6, cmd const[SIOCADDTUNNEL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCDELTUNNEL(fd sock_udp6, cmd const[SIOCDELTUNNEL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCCHGTUNNEL(fd sock_udp6, cmd const[SIOCCHGTUNNEL], arg ptr[inout, ifreq_ipv6_tunnel])
# SIOC***PRL
ioctl$sock_ipv6_tunnel_SIOCGETPRL(fd sock_udp6, cmd const[SIOCGETPRL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCADDPRL(fd sock_udp6, cmd const[SIOCADDPRL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCDELPRL(fd sock_udp6, cmd const[SIOCDELPRL], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCCHGPRL(fd sock_udp6, cmd const[SIOCCHGPRL], arg ptr[inout, ifreq_ipv6_tunnel])
# SIOC***6RD
ioctl$sock_ipv6_tunnel_SIOCGET6RD(fd sock_udp6, cmd const[SIOCGET6RD], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCADD6RD(fd sock_udp6, cmd const[SIOCADD6RD], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCDEL6RD(fd sock_udp6, cmd const[SIOCDEL6RD], arg ptr[inout, ifreq_ipv6_tunnel])
ioctl$sock_ipv6_tunnel_SIOCCHG6RD(fd sock_udp6, cmd const[SIOCCHG6RD], arg ptr[inout, ifreq_ipv6_tunnel])

35
sys/linux/socket_ip_tunnel_386.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 54

35
sys/linux/socket_ip_tunnel_amd64.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 16

35
sys/linux/socket_ip_tunnel_arm.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 54

35
sys/linux/socket_ip_tunnel_arm64.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 29

35
sys/linux/socket_ip_tunnel_mips64le.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 5015

35
sys/linux/socket_ip_tunnel_ppc64le.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 54

35
sys/linux/socket_ip_tunnel_riscv64.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 32768
GRE_CSUM = 128
GRE_FLAGS = 30720
GRE_KEY = 32
GRE_REC = 7
GRE_ROUTING = 64
GRE_SEQ = 16
GRE_STRICT = 8
GRE_VERSION = 1792
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 29

35
sys/linux/socket_ip_tunnel_s390x.const Normal file
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# AUTOGENERATED FILE
GRE_ACK = 128
GRE_CSUM = 32768
GRE_FLAGS = 120
GRE_KEY = 8192
GRE_REC = 1792
GRE_ROUTING = 16384
GRE_SEQ = 4096
GRE_STRICT = 2048
GRE_VERSION = 7
IFNAMSIZ = 16
IP6_TNL_F_ALLOW_LOCAL_REMOTE = 64
IP6_TNL_F_IGN_ENCAP_LIMIT = 1
IP6_TNL_F_MIP6_DEV = 8
IP6_TNL_F_RCV_DSCP_COPY = 16
IP6_TNL_F_USE_ORIG_FLOWLABEL = 4
IP6_TNL_F_USE_ORIG_FWMARK = 32
IP6_TNL_F_USE_ORIG_TCLASS = 2
IPPROTO_GRE = 47
IPPROTO_IPIP = 4
IPPROTO_IPV6 = 41
SIOCADD6RD = 35321
SIOCADDPRL = 35317
SIOCADDTUNNEL = 35313
SIOCCHG6RD = 35323
SIOCCHGPRL = 35319
SIOCCHGTUNNEL = 35315
SIOCDEL6RD = 35322
SIOCDELPRL = 35318
SIOCDELTUNNEL = 35314
SIOCGET6RD = 35320
SIOCGETPRL = 35316
SIOCGETTUNNEL = 35312
VTI_ISVTI = 1
__NR_ioctl = 54