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networkd: support 6rd tunnel netdev setup.
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b0395ac5cd
commit
d067cab35c
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@ -911,6 +911,14 @@
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<para>Accepts the same key as <literal>[FooOverUDP]</literal></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>IPv6RapidDeploymentPrefix=</varname></term>
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<listitem>
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<para>Reconfigure the tunnel for <ulink url="https://tools.ietf.org/html/rfc5569">IPv6 Rapid
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Deployment</ulink>, also known as 6rd. The value is an ISP-specific IPv6 prefix with a non-zero length. Only
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applicable to SIT tunnels.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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@ -1519,6 +1527,18 @@ Local=10.65.223.238
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Remote=10.65.223.239</programlisting>
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</example>
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<example>
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<title>/etc/systemd/network/25-6rd.netdev</title>
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<programlisting>[NetDev]
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Name=6rd-tun
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Kind=sit
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MTUBytes=1480
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[Tunnel]
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Local=10.65.223.238
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IPv6RapidDeploymentPrefix=2602::/24</programlisting>
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</example>
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<example>
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<title>/etc/systemd/network/25-gre.netdev</title>
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<programlisting>[NetDev]
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@ -70,6 +70,7 @@ Tunnel.FooOverUDP, config_parse_bool, 0,
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Tunnel.FOUDestinationPort, config_parse_ip_port, 0, offsetof(Tunnel, fou_destination_port)
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Tunnel.FOUSourcePort, config_parse_ip_port, 0, offsetof(Tunnel, encap_src_port)
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Tunnel.Encapsulation, config_parse_fou_encap_type, 0, offsetof(Tunnel, fou_encap_type)
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Tunnel.IPv6RapidDeploymentPrefix, config_parse_6rd_prefix, 0, 0
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FooOverUDP.Protocol, config_parse_uint8, 0, offsetof(FouTunnel, fou_protocol)
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FooOverUDP.Encapsulation, config_parse_fou_encap_type, 0, offsetof(FouTunnel, fou_encap_type)
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FooOverUDP.Port, config_parse_ip_port, 0, offsetof(FouTunnel, port)
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@ -114,6 +114,18 @@ static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_netlink
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m");
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if (t->sixrd_prefixlen > 0) {
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r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_6RD_PREFIX, &t->sixrd_prefix);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_6RD_PREFIX attribute: %m");
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/* u16 is deliberate here, even though we're passing a netmask that can never be >128. The kernel is
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* expecting to receive the prefixlen as a u16.
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*/
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_PREFIXLEN, t->sixrd_prefixlen);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_6RD_PREFIXLEN attribute: %m");
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}
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return r;
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}
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@ -617,6 +629,42 @@ int config_parse_encap_limit(const char* unit,
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return 0;
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}
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int config_parse_6rd_prefix(const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Tunnel *t = userdata;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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union in_addr_union p;
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uint8_t l;
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int r;
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r = in_addr_prefix_from_string(rvalue, AF_INET6, &p, &l);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse 6rd prefix \"%s\", ignoring: %m", rvalue);
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return 0;
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}
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if (l == 0) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "6rd prefix length of \"%s\" must be greater than zero, ignoring", rvalue);
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return 0;
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}
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t->sixrd_prefix = p.in6;
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t->sixrd_prefixlen = l;
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return 0;
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}
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static void ipip_init(NetDev *n) {
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Tunnel *t = IPIP(n);
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@ -3,6 +3,7 @@
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#include "in-addr-util.h"
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#include "conf-parser.h"
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#include "netdev/netdev.h"
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#include "netdev/fou-tunnel.h"
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@ -50,6 +51,9 @@ typedef struct Tunnel {
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uint16_t encap_src_port;
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uint16_t fou_destination_port;
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struct in6_addr sixrd_prefix;
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uint8_t sixrd_prefixlen;
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} Tunnel;
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DEFINE_NETDEV_CAST(IPIP, Tunnel);
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@ -108,3 +112,5 @@ int config_parse_tunnel_key(const char *unit, const char *filename,
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unsigned section_line, const char *lvalue,
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int ltype, const char *rvalue, void *data,
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void *userdata);
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CONFIG_PARSER_PROTOTYPE(config_parse_6rd_prefix);
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