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authorSusant Sahani <susant@redhat.com>2015-01-17 00:39:10 +0530
committerTom Gundersen <teg@jklm.no>2015-01-22 21:29:42 +0100
commit855ee1a1d272b599410212b40768a9c71f260e37 (patch)
treef6f79ccf0e42062252a296f19b126a9fb21b4bf6 /src/network/networkd-netdev-tunnel.c
parent1af2536acf8aecc3eb940d04268a419c956ee10a (diff)
networkd: Introduce IP6 tunnel
This patch enables networkd to create IP6 tunnels example conf: ipip6.netdev: [NetDev] Name=ipip6-tunnel Kind=ip6tnl [Tunnel] Mode=ip4ipv6 Local=2a00:ffde:4567:edde::4987 Remote=2001:473:fece:cafe::5179 ipip6.network [Match] Name=wlan0 [Network] Tunnel=ipip6-tunnel 23: ipip6-tunnel@wlan0: <POINTOPOINT,NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default link/tunnel6 2a00:ffde:4567:edde::4987 peer 2001:473:fece:cafe::5179
Diffstat (limited to 'src/network/networkd-netdev-tunnel.c')
-rw-r--r--src/network/networkd-netdev-tunnel.c113
1 files changed, 111 insertions, 2 deletions
diff --git a/src/network/networkd-netdev-tunnel.c b/src/network/networkd-netdev-tunnel.c
index fde08fb1e6..f439bf91b5 100644
--- a/src/network/networkd-netdev-tunnel.c
+++ b/src/network/networkd-netdev-tunnel.c
@@ -3,7 +3,7 @@
/***
This file is part of systemd.
- Copyright 2014 Susant Sahani <susant@redhat.com>
+ Copyright 2014 Susant Sahani
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
@@ -24,6 +24,7 @@
#include <net/if.h>
#include <linux/ip.h>
#include <linux/if_tunnel.h>
+#include <linux/ip6_tunnel.h>
#include "sd-rtnl.h"
#include "networkd-netdev-tunnel.h"
@@ -33,6 +34,17 @@
#include "missing.h"
#include "conf-parser.h"
+#define DEFAULT_TNL_HOP_LIMIT 64
+
+static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = {
+ [NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6",
+ [NETDEV_IP6_TNL_MODE_IPIP6] = "ip4ipv6",
+ [NETDEV_IP6_TNL_MODE_ANYIP6] = "any",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode, Ip6TnlMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode, ip6tnl_mode, Ip6TnlMode, "Failed to parse ip6 tunnel Mode");
+
static int netdev_ipip_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
Tunnel *t = IPIP(netdev);
int r;
@@ -243,6 +255,73 @@ static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_me
return r;
}
+static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
+ Tunnel *t = IP6TNL(netdev);
+ uint8_t proto;
+ int r;
+
+ assert(netdev);
+ assert(link);
+ assert(m);
+ assert(t);
+ assert(t->family == AF_INET6);
+
+ r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IPTUN_LINK attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_in6_addr(m, IFLA_IPTUN_LOCAL, &t->local.in6);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IPTUN_LOCAL attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_in6_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in6);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IPTUN_REMOTE attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IPTUN_TTL attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ switch (t->ip6tnl_mode) {
+ case NETDEV_IP6_TNL_MODE_IP6IP6:
+ proto = IPPROTO_IPV6;
+ break;
+ case NETDEV_IP6_TNL_MODE_IPIP6:
+ proto = IPPROTO_IPIP;
+ break;
+ case NETDEV_IP6_TNL_MODE_ANYIP6:
+ default:
+ proto = 0;
+ break;
+ }
+
+ r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_PROTO, proto);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IPTUN_MODE attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ return r;
+}
+
static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
Tunnel *t = NULL;
@@ -265,6 +344,9 @@ static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
case NETDEV_KIND_VTI:
t = VTI(netdev);
break;
+ case NETDEV_KIND_IP6TNL:
+ t = IP6TNL(netdev);
+ break;
default:
assert_not_reached("Invalid tunnel kind");
}
@@ -276,11 +358,18 @@ static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
return -EINVAL;
}
- if (t->family != AF_INET) {
+ if (t->family != AF_INET && t->family != AF_INET6) {
log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename);
return -EINVAL;
}
+ if (netdev->kind == NETDEV_KIND_IP6TNL) {
+ if (t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID) {
+ log_warning("IP6 Tunnel without mode configured in %s. Ignoring", filename);
+ return -EINVAL;
+ }
+ }
+
return 0;
}
@@ -362,6 +451,17 @@ static void gre_init(NetDev *n) {
t->pmtudisc = true;
}
+static void ip6tnl_init(NetDev *n) {
+ Tunnel *t = IP6TNL(n);
+
+ assert(n);
+ assert(t);
+
+ t->ttl = DEFAULT_TNL_HOP_LIMIT;
+ t->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
+ t->ip6tnl_mode = _NETDEV_IP6_TNL_MODE_INVALID;
+}
+
const NetDevVTable ipip_vtable = {
.object_size = sizeof(Tunnel),
.init = ipip_init,
@@ -406,3 +506,12 @@ const NetDevVTable gretap_vtable = {
.create_type = NETDEV_CREATE_STACKED,
.config_verify = netdev_tunnel_verify,
};
+
+const NetDevVTable ip6tnl_vtable = {
+ .object_size = sizeof(Tunnel),
+ .init = ip6tnl_init,
+ .sections = "Match\0NetDev\0Tunnel\0",
+ .fill_message_create = netdev_ip6tnl_fill_message_create,
+ .create_type = NETDEV_CREATE_STACKED,
+ .config_verify = netdev_tunnel_verify,
+};