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/linux/net/ipv6/
H A DKconfig3 # IPv6 configuration
6 # IPv6 as module will cause a CRASH if you try to unload it
7 menuconfig IPV6 config
8 tristate "The IPv6 protocol"
12 Support for IP version 6 (IPv6).
14 For general information about IPv6, see
15 <https://en.wikipedia.org/wiki/IPv6>.
16 For specific information about IPv6 under Linux, see
17 Documentation/networking/ipv6.rst and read the HOWTO at
18 <https://www.tldp.org/HOWTO/Linux+IPv6
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H A Dsysctl_net_ipv6.c3 * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
12 #include <linux/ipv6.h>
16 #include <net/ipv6.h>
40 ipv6.sysctl.multipath_hash_policy); in proc_rt6_multipath_hash_policy()
56 ipv6.sysctl.multipath_hash_fields); in proc_rt6_multipath_hash_fields()
67 .data = &init_net.ipv6.sysctl.bindv6only,
74 .data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
81 .data = &init_net.ipv6.sysctl.flowlabel_consistency,
88 .data = &init_net.ipv6.sysctl.auto_flowlabels,
96 .data = &init_net.ipv6.sysctl.fwmark_reflect,
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H A DMakefile6 obj-$(CONFIG_IPV6) += ipv6.o
8 ipv6-y := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o \
15 ipv6-$(CONFIG_SYSCTL) += sysctl_net_ipv6.o
16 ipv6-$(CONFIG_IPV6_MROUTE) += ip6mr.o
18 ipv6-$(CONFIG_XFRM) += xfrm6_policy.o xfrm6_state.o xfrm6_input.o \
20 ipv6-$(CONFIG_NETFILTER) += netfilter.o
21 ipv6-$(CONFIG_IPV6_MULTIPLE_TABLES) += fib6_rules.o
22 ipv6-$(CONFIG_PROC_FS) += proc.o
23 ipv6-$(CONFIG_SYN_COOKIES) += syncookies.o
24 ipv6-$(CONFIG_NETLABEL) += calipso.o
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H A Dip6_fib.c16 #define pr_fmt(fmt) "IPv6: " fmt
30 #include <net/ipv6.h>
76 list_for_each_entry(w, &(net)->ipv6.fib6_walkers, lh)
80 write_lock_bh(&net->ipv6.fib6_walker_lock); in fib6_walker_link()
81 list_add(&w->lh, &net->ipv6.fib6_walkers); in fib6_walker_link()
82 write_unlock_bh(&net->ipv6.fib6_walker_lock); in fib6_walker_link()
87 write_lock_bh(&net->ipv6.fib6_walker_lock); in fib6_walker_unlink()
89 write_unlock_bh(&net->ipv6.fib6_walker_lock); in fib6_walker_unlink()
94 int new, old = atomic_read(&net->ipv6.fib6_sernum); in fib6_new_sernum()
98 } while (!atomic_try_cmpxchg(&net->ipv6.fib6_sernum, &old, new)); in fib6_new_sernum()
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H A Dfib6_rules.c3 * net/ipv6/fib6_rules.c IPv6 Routing Policy Rules
20 #include <net/ipv6.h>
73 if (net->ipv6.fib6_has_custom_rules) { in fib6_lookup()
83 err = fib_rules_lookup(net->ipv6.fib6_rules_ops, in fib6_lookup()
86 err = fib6_table_lookup(net, net->ipv6.fib6_local_tbl, oif, in fib6_lookup()
88 if (err || res->f6i == net->ipv6.fib6_null_entry) in fib6_lookup()
89 err = fib6_table_lookup(net, net->ipv6.fib6_main_tbl, in fib6_lookup()
100 if (net->ipv6.fib6_has_custom_rules) { in fib6_rule_lookup()
112 fib_rules_lookup(net->ipv6.fib6_rules_ops, in fib6_rule_lookup()
121 net, net->ipv6.fib6_local_tbl, fl6, skb, flags); in fib6_rule_lookup()
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/linux/Documentation/networking/
H A Dipv6.rst4 IPv6 title
8 Options for the ipv6 module are supplied as parameters at load time.
15 The available ipv6 module parameters are listed below. If a parameter
22 Specifies whether to load the IPv6 module, but disable all
24 has a dependency on the IPv6 module being loaded, but no
25 IPv6 addresses or operations are desired.
30 IPv6 is enabled.
35 IPv6 is disabled.
37 No IPv6 addresses will be added to interfaces, and
38 it will not be possible to open an IPv6 socket.
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/linux/net/6lowpan/
H A DKconfig4 depends on IPV6
6 This enables IPv6 over Low power Wireless Personal Area Network -
31 6LoWPAN IPv6 Destination Options Header compression according to
38 6LoWPAN IPv6 Fragment Header compression according to RFC6282.
44 6LoWPAN IPv6 Hop-by-Hop Options Header compression according to
48 tristate "IPv6 Header Support"
51 6LoWPAN IPv6 Header compression according to RFC6282.
57 6LoWPAN IPv6 Mobility Header compression according to RFC6282.
63 6LoWPAN IPv6 Routing Header compression according to RFC6282.
69 6LoWPAN IPv6 UDP Header compression according to RFC6282.
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/linux/tools/testing/selftests/net/
H A Dbareudp.sh8 # configurations of bareudp (using IPv4 or IPv6 as underlay and transporting
9 # IPv4, IPv6 or MPLS packets on the overlay).
14 # is assigned an IPv4 and an IPv6 address. A host-route allows a veth to
18 # IPv4 and IPv6 addresses on their loopback device. Routes are added in NS0
20 # For IPv4 and IPv6 reachability tests, the route simply sets the peer's
32 # | * IPv6 address: 2001:db8::100/128 |
33 # | * IPv6 address: 2001:db8::200/128 |
35 # | * IPv6 route: 2001:db8::103/128 reachable via 2001:db8::11 |
36 # | * IPv6 route: 2001:db8::203/128 reachable via 2001:db8::11 |
41 # | | * IPv6 addres
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H A Dsrv6_hencap_red_l3vpn_test.sh8 # Below is depicted the IPv6 network of an operator which offers advanced
9 # IPv4/IPv6 VPN services to hosts, enabling them to communicate with each
11 # In this example, hosts hs-1 and hs-2 are connected through an IPv4/IPv6 VPN
12 # service, while hs-3 and hs-4 are connected using an IPv6 only VPN.
14 # Routers rt-1,rt-2,rt-3 and rt-4 implement IPv4/IPv6 L3 VPN services
22 # into the IPv6 Destination Address. When a SRv6 Policy is made of only one
24 # SID directly into the IPv6 DA;
31 # handling, at the same time, both tunneled IPv4 and IPv6 traffic.
74 # in the IPv6 operator network.
90 # services. Reachability of SIDs is ensured by proper configuration of the IPv6
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H A Dgre_ipv6_lladdr.sh17 # Add fake IPv4 and IPv6 networks on the loopback device, to be used as
27 # Check the IPv6 configuration of a network device.
29 # We currently check the generation of the link-local IPv6 address and the
51 check_err_fail "${XRET}" $? "IPv6 link-local address generation"
54 check_err_fail 0 $? "IPv6 multicast route creation"
60 # Create a GRE device and verify that it gets an IPv6 link-local address as
66 # * $2: The local underlay IP address (can be an IPv4, an IPv6 or "any")
67 # * $3: The remote underlay IP address (can be an IPv4, an IPv6 or "any")
68 # * $4: The IPv6 interface identifier generation mode to use for the GRE
102 ip netns exec "${NS0}" sysctl -qw net.ipv6.conf.gretest.stable_secret="2001:db8::abcd"
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/linux/net/ipv6/netfilter/
H A DKconfig6 menu "IPv6: Netfilter Configuration"
7 depends on INET && IPV6 && NETFILTER
12 depends on INET && IPV6 && NETFILTER_XTABLES_LEGACY
21 tristate "IPv6 socket lookup support"
23 This option enables the IPv6 socket lookup infrastructure. This
27 tristate "IPv6 tproxy support"
32 bool "IPv6 nf_tables support"
34 This option enables the IPv6 support for nf_tables.
44 tristate "IPv6 nf_tables packet duplication support"
48 This module enables IPv6 packet duplication support for nf_tables.
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/linux/tools/testing/selftests/bpf/progs/
H A Dconnect6_prog.c35 memset(&tuple.ipv6.saddr, 0, sizeof(tuple.ipv6.saddr)); in connect_v6_prog()
36 memset(&tuple.ipv6.sport, 0, sizeof(tuple.ipv6.sport)); in connect_v6_prog()
38 tuple.ipv6.daddr[0] = bpf_htonl(DST_REWRITE_IP6_0); in connect_v6_prog()
39 tuple.ipv6.daddr[1] = bpf_htonl(DST_REWRITE_IP6_1); in connect_v6_prog()
40 tuple.ipv6.daddr[2] = bpf_htonl(DST_REWRITE_IP6_2); in connect_v6_prog()
41 tuple.ipv6.daddr[3] = bpf_htonl(DST_REWRITE_IP6_3); in connect_v6_prog()
43 tuple.ipv6.dport = bpf_htons(DST_REWRITE_PORT6); in connect_v6_prog()
48 sk = bpf_sk_lookup_tcp(ctx, &tuple, sizeof(tuple.ipv6), in connect_v6_prog()
51 sk = bpf_sk_lookup_udp(ctx, &tuple, sizeof(tuple.ipv6), in connect_v6_prog()
57 if (sk->src_ip6[0] != tuple.ipv6.daddr[0] || in connect_v6_prog()
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H A Dtest_tcp_custom_syncookie.c62 struct ipv6hdr *ipv6; member
101 ctx->ipv6 = (struct ipv6hdr *)(ctx->eth + 1); in tcp_load_headers()
103 if (ctx->ipv6 + 1 > ctx->data_end) in tcp_load_headers()
106 if (ctx->ipv6->version != 6) in tcp_load_headers()
109 if (ctx->ipv6->nexthdr != NEXTHDR_TCP) in tcp_load_headers()
112 ctx->tcp = (struct tcphdr *)(ctx->ipv6 + 1); in tcp_load_headers()
145 ctx->ipv6 = NULL; in tcp_reload_headers()
149 ctx->ipv6 = (struct ipv6hdr *)(ctx->eth + 1); in tcp_reload_headers()
150 ctx->tcp = (struct tcphdr *)(ctx->ipv6 + 1); in tcp_reload_headers()
169 return csum_ipv6_magic(&ctx->ipv6 in tcp_v6_csum()
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H A Dtest_cls_redirect_dynptr.c15 #include <linux/ipv6.h>
93 offsetofend(struct bpf_sock_tuple, ipv6.dport) -
94 offsetof(struct bpf_sock_tuple, ipv6.sport) - 1,
188 const struct ipv6hdr *ipv6, uint8_t *upper_proto, in pkt_skip_ipv6_extension_headers() argument
200 .next = ipv6->nexthdr, in pkt_skip_ipv6_extension_headers()
244 static int pkt_parse_ipv6(struct bpf_dynptr *dynptr, __u64 *offset, struct ipv6hdr *ipv6, in pkt_parse_ipv6() argument
247 if (bpf_dynptr_read(ipv6, sizeof(*ipv6), dynptr, *offset, 0)) in pkt_parse_ipv6()
250 *offset += sizeof(*ipv6); in pkt_parse_ipv6()
252 if (!pkt_skip_ipv6_extension_headers(dynptr, offset, ipv6, prot in pkt_parse_ipv6()
525 struct ipv6hdr *ipv6 = (struct ipv6hdr *)iph; fill_tuple() local
658 struct ipv6hdr ipv6; process_icmpv6() local
793 struct ipv6hdr ipv6; process_ipv6() local
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/linux/include/uapi/linux/
H A Din6.h10 * IPv6 Program Interfaces for BSD Systems
13 * Advanced Sockets API for IPv6
29 * IPv6 address structure
53 __be32 sin6_flowinfo; /* IPv6 flow information */
54 struct in6_addr sin6_addr; /* IPv6 address */
61 /* IPv6 multicast address of group */
64 /* local IPv6 address of interface */
129 * IPV6 extension headers
132 #define IPPROTO_HOPOPTS 0 /* IPv6 hop-by-hop options */
133 #define IPPROTO_ROUTING 43 /* IPv6 routing header */
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/linux/tools/testing/selftests/net/forwarding/
H A Dip6gre_flat.sh39 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6"
40 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6"
52 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 (new remote)"
53 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 (new remote)"
57 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 (old remote)"
58 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 (old remote)"
H A Dip6gre_hier.sh39 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6"
40 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6"
52 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 (new remote)"
53 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 (new remote)"
57 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 (old remote)"
58 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 (old remote)"
H A Dip6gre_hier_key.sh39 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with key"
40 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with key"
52 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with key (new remote)"
53 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with key (new remote)"
57 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with key (old remote)"
58 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with key (old remote)"
H A Dip6gre_flat_key.sh39 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with key"
40 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with key"
52 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with key (new remote)"
53 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with key (new remote)"
57 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with key (old remote)"
58 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with key (old remote)"
H A Dip6gre_flat_keys.sh39 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with ikey/okey"
40 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with ikey/okey"
52 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with ikey/okey (new remote)"
53 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with ikey/okey (new remote)"
57 test_traffic_ip4ip6 "GRE flat IPv4-in-IPv6 with ikey/okey (old remote)"
58 test_traffic_ip6ip6 "GRE flat IPv6-in-IPv6 with ikey/okey (old remote)"
H A Dip6gre_hier_keys.sh39 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with ikey/okey"
40 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with ikey/okey"
52 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with ikey/okey (new remote)"
53 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with ikey/okey (new remote)"
57 test_traffic_ip4ip6 "GRE hierarchical IPv4-in-IPv6 with ikey/okey (old remote)"
58 test_traffic_ip6ip6 "GRE hierarchical IPv6-in-IPv6 with ikey/okey (old remote)"
/linux/drivers/net/ethernet/mediatek/
H A Dmtk_ppe_debugfs.c7 #include <net/ipv6.h>
15 bool ipv6; member
39 [MTK_PPE_PKT_TYPE_IPV6_ROUTE_3T] = "IPv6 3T", in mtk_foe_pkt_type_str()
40 [MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T] = "IPv6 5T", in mtk_foe_pkt_type_str()
51 mtk_print_addr(struct seq_file *m, u32 *addr, bool ipv6) in mtk_print_addr() argument
55 if (!ipv6) { in mtk_print_addr()
67 mtk_print_addr(m, ai->src, ai->ipv6); in mtk_print_addr_info()
71 mtk_print_addr(m, ai->dest, ai->ipv6); in mtk_print_addr_info()
118 ai.src_port = &entry->ipv6.src_port; in mtk_ppe_debugfs_foe_show()
119 ai.dest_port = &entry->ipv6.dest_port; in mtk_ppe_debugfs_foe_show()
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/linux/net/netfilter/ipset/
H A DKconfig60 can store arbitrary IPv4 or IPv6 addresses (or network addresses)
70 can store IPv4/IPv6 address and mark pairs.
79 can store IPv4/IPv6 address and protocol/port pairs.
88 one can store IPv4/IPv6 address, protocol/port, and IPv4/IPv6
98 one can store IPv4/IPv6 address, protocol/port, and IPv4/IPv6
108 one can store IPv4/IPv6 address and MAC (ethernet address) pairs in a set.
126 one can store two IPv4/IPv6 subnets, and a protocol/port in a set.
135 one can store IPv4/IPv6 network address/prefix elements in a set.
144 one can store IPv4/IPv6 network address/prefix pairs in a set.
153 one can store IPv4/IPv6 network address/prefix and
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/linux/Documentation/netlink/specs/
H A Dovpn.yaml56 name: remote-ipv6
58 doc: The remote IPv6 address of the peer
59 display-hint: ipv6
63 name: remote-ipv6-scope-id
65 doc: The scope id of the remote IPv6 address of the peer (RFC2553)
88 name: vpn-ipv6
90 doc: The IPv6 address assigned to the peer by the server
91 display-hint: ipv6
101 name: local-ipv6
103 doc: The local IPv6 to be used to send packets to the peer (UDP only)
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/linux/net/netlabel/
H A Dnetlabel_addrlist.c24 #include <linux/ipv6.h>
26 #include <net/ipv6.h>
86 * netlbl_af6list_search - Search for a matching IPv6 address entry
87 * @addr: IPv6 address
91 * Searches the IPv6 address list given by @head. If a matching address entry
110 * netlbl_af6list_search_exact - Search for an exact IPv6 address entry
111 * @addr: IPv6 address
112 * @mask: IPv6 address mask
116 * Searches the IPv6 address list given by @head. If an exact match if found
135 #endif /* IPv6 */
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