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networkd: introduce gre tunnel

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This patch enables gre tunnel support.

example conf:

file : gre.netdev
[NetDev]
Name=gre-tun
Kind=gre
MTUBytes=1480

[Tunnel]
Local=X.X.X.X
Remote=X.X.X.X

file: gre.network
[Match]
Name=em1

[Network]
Tunnel=gre-tun

TODO:

Add more attributes for gre tunnel
IFLA_GRE_IFLAGS
IFLA_GRE_IFLAGS
IFLA_GRE_IKEY
IFLA_GRE_OKEY
This commit is contained in:
Susant Sahani
2014-06-02 16:13:00 +02:00
committed by Tom Gundersen
parent 4d7ec9fc36
commit 8bb088c5d4
2 changed files with 127 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/network/networkd-tunnel.c
+110
View File
@@ -226,6 +226,112 @@ static int netdev_fill_sit_rtnl_message(Link *link, sd_rtnl_message *m) {
return r;
}
static int netdev_fill_ipgre_rtnl_message(Link *link, sd_rtnl_message *m) {
NetDev *netdev;
int r;
assert(link);
assert(link->network);
assert(link->network->tunnel);
assert(m);
netdev = link->network->tunnel;
r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IFNAME, attribute: %s",
strerror(-r));
return r;
}
if(netdev->mtu) {
r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_MTU attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
netdev_kind_to_string(netdev->kind));
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_u32(m, IFLA_GRE_LINK, link->ifindex);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_GRE_LINK attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_LOCAL, &netdev->tunnel_local);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_GRE_LOCAL attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_REMOTE, &netdev->tunnel_remote);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_GRE_REMOTE attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_u8(m, IFLA_GRE_TTL, netdev->tunnel_ttl);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_GRE_TTL attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_append_u8(m, IFLA_GRE_TOS, netdev->tunnel_tos);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_GRE_TOS attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
return r;
}
int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
NetDev *netdev;
@@ -281,6 +387,10 @@ int netdev_create_tunnel(Link *link, sd_rtnl_message_handler_t callback) {
return r;
break;
case NETDEV_KIND_GRE:
r = netdev_fill_ipgre_rtnl_message(link, m);
if(r < 0)
return r;
break;
default:
return -ENOTSUP;
}