1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2014 Susant Sahani
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <arpa/inet.h>
25 #include <linux/if_tunnel.h>
26 #include <linux/ip6_tunnel.h>
28 #include "sd-netlink.h"
29 #include "networkd-netdev-tunnel.h"
30 #include "networkd-link.h"
33 #include "conf-parser.h"
35 #define DEFAULT_TNL_HOP_LIMIT 64
36 #define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
38 static const char* const ip6tnl_mode_table
[_NETDEV_IP6_TNL_MODE_MAX
] = {
39 [NETDEV_IP6_TNL_MODE_IP6IP6
] = "ip6ip6",
40 [NETDEV_IP6_TNL_MODE_IPIP6
] = "ipip6",
41 [NETDEV_IP6_TNL_MODE_ANYIP6
] = "any",
44 DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode
, Ip6TnlMode
);
45 DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode
, ip6tnl_mode
, Ip6TnlMode
, "Failed to parse ip6 tunnel Mode");
47 static int netdev_ipip_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
48 Tunnel
*t
= IPIP(netdev
);
55 assert(t
->family
== AF_INET
);
57 r
= sd_netlink_message_append_u32(m
, IFLA_IPTUN_LINK
, link
->ifindex
);
59 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LINK attribute: %m");
61 r
= sd_netlink_message_append_in_addr(m
, IFLA_IPTUN_LOCAL
, &t
->local
.in
);
63 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
65 r
= sd_netlink_message_append_in_addr(m
, IFLA_IPTUN_REMOTE
, &t
->remote
.in
);
67 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
69 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_TTL
, t
->ttl
);
71 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_TTL attribute: %m");
73 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_PMTUDISC
, t
->pmtudisc
);
75 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m");
80 static int netdev_sit_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
81 Tunnel
*t
= SIT(netdev
);
88 assert(t
->family
== AF_INET
);
90 r
= sd_netlink_message_append_u32(m
, IFLA_IPTUN_LINK
, link
->ifindex
);
92 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LINK attribute: %m");
94 r
= sd_netlink_message_append_in_addr(m
, IFLA_IPTUN_LOCAL
, &t
->local
.in
);
96 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
98 r
= sd_netlink_message_append_in_addr(m
, IFLA_IPTUN_REMOTE
, &t
->remote
.in
);
100 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
102 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_TTL
, t
->ttl
);
104 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_TTL attribute: %m");
106 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_PMTUDISC
, t
->pmtudisc
);
108 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m");
113 static int netdev_gre_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
119 if (netdev
->kind
== NETDEV_KIND_GRE
)
125 assert(t
->family
== AF_INET
);
129 r
= sd_netlink_message_append_u32(m
, IFLA_GRE_LINK
, link
->ifindex
);
131 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_LINK attribute: %m");
133 r
= sd_netlink_message_append_in_addr(m
, IFLA_GRE_LOCAL
, &t
->local
.in
);
135 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_LOCAL attribute: %m");
137 r
= sd_netlink_message_append_in_addr(m
, IFLA_GRE_REMOTE
, &t
->remote
.in
);
139 log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_REMOTE attribute: %m");
141 r
= sd_netlink_message_append_u8(m
, IFLA_GRE_TTL
, t
->ttl
);
143 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_TTL attribute: %m");
145 r
= sd_netlink_message_append_u8(m
, IFLA_GRE_TOS
, t
->tos
);
147 log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_TOS attribute: %m");
149 r
= sd_netlink_message_append_u8(m
, IFLA_GRE_PMTUDISC
, t
->pmtudisc
);
151 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_PMTUDISC attribute: %m");
156 static int netdev_ip6gre_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
162 if (netdev
->kind
== NETDEV_KIND_IP6GRE
)
165 t
= IP6GRETAP(netdev
);
168 assert(t
->family
== AF_INET6
);
172 r
= sd_netlink_message_append_u32(m
, IFLA_GRE_LINK
, link
->ifindex
);
174 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_LINK attribute: %m");
176 r
= sd_netlink_message_append_in6_addr(m
, IFLA_GRE_LOCAL
, &t
->local
.in6
);
178 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_LOCAL attribute: %m");
180 r
= sd_netlink_message_append_in6_addr(m
, IFLA_GRE_REMOTE
, &t
->remote
.in6
);
182 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_REMOTE attribute: %m");
184 r
= sd_netlink_message_append_u8(m
, IFLA_GRE_TTL
, t
->ttl
);
186 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_TTL attribute: %m");
188 if (t
->ipv6_flowlabel
!= _NETDEV_IPV6_FLOWLABEL_INVALID
) {
189 r
= sd_netlink_message_append_u32(m
, IFLA_GRE_FLOWINFO
, t
->ipv6_flowlabel
);
191 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_FLOWINFO attribute: %m");
194 r
= sd_netlink_message_append_u32(m
, IFLA_GRE_FLAGS
, t
->flags
);
196 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_GRE_FLAGS attribute: %m");
201 static int netdev_vti_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
202 Tunnel
*t
= VTI(netdev
);
209 assert(t
->family
== AF_INET
);
211 r
= sd_netlink_message_append_u32(m
, IFLA_VTI_LINK
, link
->ifindex
);
213 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LINK attribute: %m");
215 r
= sd_netlink_message_append_in_addr(m
, IFLA_VTI_LOCAL
, &t
->local
.in
);
217 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
219 r
= sd_netlink_message_append_in_addr(m
, IFLA_VTI_REMOTE
, &t
->remote
.in
);
221 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
226 static int netdev_vti6_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
227 Tunnel
*t
= VTI6(netdev
);
234 assert(t
->family
== AF_INET6
);
236 r
= sd_netlink_message_append_u32(m
, IFLA_VTI_LINK
, link
->ifindex
);
238 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LINK attribute: %m");
240 r
= sd_netlink_message_append_in6_addr(m
, IFLA_VTI_LOCAL
, &t
->local
.in6
);
242 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
244 r
= sd_netlink_message_append_in6_addr(m
, IFLA_VTI_REMOTE
, &t
->remote
.in6
);
246 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
251 static int netdev_ip6tnl_fill_message_create(NetDev
*netdev
, Link
*link
, sd_netlink_message
*m
) {
252 Tunnel
*t
= IP6TNL(netdev
);
260 assert(t
->family
== AF_INET6
);
262 r
= sd_netlink_message_append_u32(m
, IFLA_IPTUN_LINK
, link
->ifindex
);
264 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LINK attribute: %m");
266 r
= sd_netlink_message_append_in6_addr(m
, IFLA_IPTUN_LOCAL
, &t
->local
.in6
);
268 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_LOCAL attribute: %m");
270 r
= sd_netlink_message_append_in6_addr(m
, IFLA_IPTUN_REMOTE
, &t
->remote
.in6
);
272 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_REMOTE attribute: %m");
274 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_TTL
, t
->ttl
);
276 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_TTL attribute: %m");
278 if (t
->ipv6_flowlabel
!= _NETDEV_IPV6_FLOWLABEL_INVALID
) {
279 r
= sd_netlink_message_append_u32(m
, IFLA_IPTUN_FLOWINFO
, t
->ipv6_flowlabel
);
281 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_FLOWINFO attribute: %m");
285 t
->flags
|= IP6_TNL_F_RCV_DSCP_COPY
;
287 r
= sd_netlink_message_append_u32(m
, IFLA_IPTUN_FLAGS
, t
->flags
);
289 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_FLAGS attribute: %m");
291 switch (t
->ip6tnl_mode
) {
292 case NETDEV_IP6_TNL_MODE_IP6IP6
:
293 proto
= IPPROTO_IPV6
;
295 case NETDEV_IP6_TNL_MODE_IPIP6
:
296 proto
= IPPROTO_IPIP
;
298 case NETDEV_IP6_TNL_MODE_ANYIP6
:
304 r
= sd_netlink_message_append_u8(m
, IFLA_IPTUN_PROTO
, proto
);
306 return log_netdev_error_errno(netdev
, r
, "Could not append IFLA_IPTUN_MODE attribute: %m");
311 static int netdev_tunnel_verify(NetDev
*netdev
, const char *filename
) {
317 switch (netdev
->kind
) {
318 case NETDEV_KIND_IPIP
:
321 case NETDEV_KIND_SIT
:
324 case NETDEV_KIND_GRE
:
327 case NETDEV_KIND_GRETAP
:
330 case NETDEV_KIND_IP6GRE
:
333 case NETDEV_KIND_IP6GRETAP
:
334 t
= IP6GRETAP(netdev
);
336 case NETDEV_KIND_VTI
:
339 case NETDEV_KIND_VTI6
:
342 case NETDEV_KIND_IP6TNL
:
346 assert_not_reached("Invalid tunnel kind");
351 if (t
->remote
.in
.s_addr
== INADDR_ANY
) {
352 log_warning("Tunnel without remote address configured in %s. Ignoring", filename
);
356 if (t
->family
!= AF_INET
&& t
->family
!= AF_INET6
) {
357 log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename
);
361 if (netdev
->kind
== NETDEV_KIND_IP6TNL
) {
362 if (t
->ip6tnl_mode
== _NETDEV_IP6_TNL_MODE_INVALID
) {
363 log_warning("IP6 Tunnel without mode configured in %s. Ignoring", filename
);
371 int config_parse_tunnel_address(const char *unit
,
372 const char *filename
,
375 unsigned section_line
,
381 Tunnel
*t
= userdata
;
382 union in_addr_union
*addr
= data
, buffer
;
390 r
= in_addr_from_string_auto(rvalue
, &f
, &buffer
);
392 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
, "Tunnel address is invalid, ignoring assignment: %s", rvalue
);
396 if (t
->family
!= AF_UNSPEC
&& t
->family
!= f
) {
397 log_syntax(unit
, LOG_ERR
, filename
, line
, EINVAL
, "Tunnel addresses incompatible, ignoring assignment: %s", rvalue
);
407 int config_parse_ipv6_flowlabel(const char* unit
,
408 const char *filename
,
411 unsigned section_line
,
417 IPv6FlowLabel
*ipv6_flowlabel
= data
;
418 Tunnel
*t
= userdata
;
425 assert(ipv6_flowlabel
);
427 if (streq(rvalue
, "inherit")) {
428 *ipv6_flowlabel
= IP6_FLOWINFO_FLOWLABEL
;
429 t
->flags
|= IP6_TNL_F_USE_ORIG_FLOWLABEL
;
431 r
= config_parse_int(unit
, filename
, line
, section
, section_line
, lvalue
, ltype
, rvalue
, &k
, userdata
);
434 log_syntax(unit
, LOG_ERR
, filename
, line
, k
, "Failed to parse IPv6 flowlabel option, ignoring: %s", rvalue
);
436 *ipv6_flowlabel
= htonl(k
) & IP6_FLOWINFO_FLOWLABEL
;
437 t
->flags
&= ~IP6_TNL_F_USE_ORIG_FLOWLABEL
;
445 static void ipip_init(NetDev
*n
) {
454 static void sit_init(NetDev
*n
) {
463 static void vti_init(NetDev
*n
) {
468 if (n
->kind
== NETDEV_KIND_VTI
)
478 static void gre_init(NetDev
*n
) {
483 if (n
->kind
== NETDEV_KIND_GRE
)
493 static void ip6gre_init(NetDev
*n
) {
498 if (n
->kind
== NETDEV_KIND_IP6GRE
)
505 t
->ttl
= DEFAULT_TNL_HOP_LIMIT
;
508 static void ip6tnl_init(NetDev
*n
) {
509 Tunnel
*t
= IP6TNL(n
);
514 t
->ttl
= DEFAULT_TNL_HOP_LIMIT
;
515 t
->encap_limit
= IPV6_DEFAULT_TNL_ENCAP_LIMIT
;
516 t
->ip6tnl_mode
= _NETDEV_IP6_TNL_MODE_INVALID
;
517 t
->ipv6_flowlabel
= _NETDEV_IPV6_FLOWLABEL_INVALID
;
520 const NetDevVTable ipip_vtable
= {
521 .object_size
= sizeof(Tunnel
),
523 .sections
= "Match\0NetDev\0Tunnel\0",
524 .fill_message_create
= netdev_ipip_fill_message_create
,
525 .create_type
= NETDEV_CREATE_STACKED
,
526 .config_verify
= netdev_tunnel_verify
,
529 const NetDevVTable sit_vtable
= {
530 .object_size
= sizeof(Tunnel
),
532 .sections
= "Match\0NetDev\0Tunnel\0",
533 .fill_message_create
= netdev_sit_fill_message_create
,
534 .create_type
= NETDEV_CREATE_STACKED
,
535 .config_verify
= netdev_tunnel_verify
,
538 const NetDevVTable vti_vtable
= {
539 .object_size
= sizeof(Tunnel
),
541 .sections
= "Match\0NetDev\0Tunnel\0",
542 .fill_message_create
= netdev_vti_fill_message_create
,
543 .create_type
= NETDEV_CREATE_STACKED
,
544 .config_verify
= netdev_tunnel_verify
,
547 const NetDevVTable vti6_vtable
= {
548 .object_size
= sizeof(Tunnel
),
550 .sections
= "Match\0NetDev\0Tunnel\0",
551 .fill_message_create
= netdev_vti6_fill_message_create
,
552 .create_type
= NETDEV_CREATE_STACKED
,
553 .config_verify
= netdev_tunnel_verify
,
556 const NetDevVTable gre_vtable
= {
557 .object_size
= sizeof(Tunnel
),
559 .sections
= "Match\0NetDev\0Tunnel\0",
560 .fill_message_create
= netdev_gre_fill_message_create
,
561 .create_type
= NETDEV_CREATE_STACKED
,
562 .config_verify
= netdev_tunnel_verify
,
565 const NetDevVTable gretap_vtable
= {
566 .object_size
= sizeof(Tunnel
),
568 .sections
= "Match\0NetDev\0Tunnel\0",
569 .fill_message_create
= netdev_gre_fill_message_create
,
570 .create_type
= NETDEV_CREATE_STACKED
,
571 .config_verify
= netdev_tunnel_verify
,
574 const NetDevVTable ip6gre_vtable
= {
575 .object_size
= sizeof(Tunnel
),
577 .sections
= "Match\0NetDev\0Tunnel\0",
578 .fill_message_create
= netdev_ip6gre_fill_message_create
,
579 .create_type
= NETDEV_CREATE_STACKED
,
580 .config_verify
= netdev_tunnel_verify
,
583 const NetDevVTable ip6gretap_vtable
= {
584 .object_size
= sizeof(Tunnel
),
586 .sections
= "Match\0NetDev\0Tunnel\0",
587 .fill_message_create
= netdev_ip6gre_fill_message_create
,
588 .create_type
= NETDEV_CREATE_STACKED
,
589 .config_verify
= netdev_tunnel_verify
,
592 const NetDevVTable ip6tnl_vtable
= {
593 .object_size
= sizeof(Tunnel
),
595 .sections
= "Match\0NetDev\0Tunnel\0",
596 .fill_message_create
= netdev_ip6tnl_fill_message_create
,
597 .create_type
= NETDEV_CREATE_STACKED
,
598 .config_verify
= netdev_tunnel_verify
,