This works allows networkd to configure l2tp tunnel.
See http://man7.org/linux/man-pages/man8/ip-l2tp.8.html
<row><entry><varname>geneve</varname></entry>
<entry>A GEneric NEtwork Virtualization Encapsulation (GENEVE) netdev driver.</entry></row>
+ <row><entry><varname>l2tp</varname></entry>
+ <entry>A Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. It does not provide any encryption or confidentiality by itself</entry></row>
+
<row><entry><varname>vrf</varname></entry>
<entry>A Virtual Routing and Forwarding (<ulink url="https://www.kernel.org/doc/Documentation/networking/vrf.txt">VRF</ulink>) interface to create separate routing and forwarding domains.</entry></row>
</varlistentry>
</variablelist>
</refsect1>
+ <refsect1>
+ <title>[L2TP] Section Options</title>
+ <para>The <literal>[L2TP]</literal> section only applies for
+ netdevs of kind <literal>l2tp</literal>, and accepts the
+ following keys:</para>
+
+ <variablelist class='network-directives'>
+ <varlistentry>
+ <term><varname>TunnelId=</varname></term>
+ <listitem>
+ <para>Specifies the tunnel id. The value used must match the <literal>PeerTunnelId=</literal> value being used at the peer.
+ Ranges a number between 1 and 4294967295). This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>PeerTunnelId=</varname></term>
+ <listitem>
+ <para>Specifies the peer tunnel id. The value used must match the <literal>PeerTunnelId=</literal> value being used at the peer.
+ Ranges a number between 1 and 4294967295). This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>Remote=</varname></term>
+ <listitem>
+ <para>Specifies the IP address of the remote peer. This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>Local=</varname></term>
+ <listitem>
+ <para>Specifies the IP address of the local interface. This address must be the address of a local interface. This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>EncapsulationType=</varname></term>
+ <listitem>
+ <para>Specifies the encapsulation type of the tunnel. Takes one of <literal>udp</literal> or <literal>ip</literal>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>UDPSourcePort=</varname></term>
+ <listitem>
+ <para>Specifies the UDP source port to be used for the tunnel. When UDP encapsulation is selected it's mandotory. Ignored when ip
+ encapsulation is selected.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>DestinationPort=</varname></term>
+ <listitem>
+ <para>Specifies destination port. When UDP encapsulation is selected it's mandotory. Ignored when ip
+ encapsulation is selected.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>UDPChecksum=</varname></term>
+ <listitem>
+ <para>Takes a boolean. When true, specifies if UDP checksum is calculated for transmitted packets over IPv4.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>UDP6ZeroChecksumTx=</varname></term>
+ <listitem>
+ <para>Takes a boolean. When true, skip UDP checksum calculation for transmitted packets over IPv6.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>UDP6ZeroChecksumRx=</varname></term>
+ <listitem>
+ <para>Takes a boolean. When true, allows incoming UDP packets over IPv6 with zero checksum field.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>[L2TPSession] Section Options</title>
+ <para>The <literal>[L2TPSession]</literal> section only applies for
+ netdevs of kind <literal>l2tp</literal>, and accepts the
+ following keys:</para>
+ <variablelist class='network-directives'>
+ <varlistentry>
+ <term><varname>Name=</varname></term>
+ <listitem>
+ <para>Specifies the name of the sesssion. This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>SessionId=</varname></term>
+ <listitem>
+ <para>Specifies the sesssion id. The value used must match the <literal>SessionId=</literal> value being used at the peer.
+ Ranges a number between 1 and 4294967295). This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>PeerSessionId=</varname></term>
+ <listitem>
+ <para>Specifies the peer session id. The value used must match the <literal>PeerSessionId=</literal> value being used at the peer.
+ Ranges a number between 1 and 4294967295). This option is compulsory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>Layer2SpecificHeader=</varname></term>
+ <listitem>
+ <para>Specifies layer2specific header type of the session. One of <literal>none</literal> or <literal>default</literal>. Defaults to <literal>default</literal>.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
<refsect1>
<title>[Tunnel] Section Options</title>
} genl_family;
static const genl_family genl_families[] = {
- [SD_GENL_ID_CTRL] = { .name = "", .version = 1 },
+ [SD_GENL_ID_CTRL] = { .name = "", .version = 1 },
[SD_GENL_WIREGUARD] = { .name = "wireguard", .version = 1 },
[SD_GENL_FOU] = { .name = "fou", .version = 1 },
+ [SD_GENL_L2TP] = { .name = "l2tp", .version = 1},
};
int sd_genl_socket_open(sd_netlink **ret) {
#include <linux/if_bridge.h>
#include <linux/if_link.h>
#include <linux/if_tunnel.h>
+#include <linux/l2tp.h>
#include <linux/veth.h>
#if HAVE_LINUX_FOU_H
.types = genl_fou_cmds,
};
+static const NLType genl_l2tp_types[] = {
+ [L2TP_ATTR_PW_TYPE] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_ENCAP_TYPE] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_OFFSET] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_DATA_SEQ] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_L2SPEC_TYPE] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_L2SPEC_LEN] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_PROTO_VERSION] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_IFNAME] = { .type = NETLINK_TYPE_STRING },
+ [L2TP_ATTR_CONN_ID] = { .type = NETLINK_TYPE_U32 },
+ [L2TP_ATTR_PEER_CONN_ID] = { .type = NETLINK_TYPE_U32 },
+ [L2TP_ATTR_SESSION_ID] = { .type = NETLINK_TYPE_U32 },
+ [L2TP_ATTR_PEER_SESSION_ID] = { .type = NETLINK_TYPE_U32 },
+ [L2TP_ATTR_UDP_CSUM] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_VLAN_ID] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_RECV_SEQ] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_SEND_SEQ] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_LNS_MODE] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_USING_IPSEC] = { .type = NETLINK_TYPE_U8 },
+ [L2TP_ATTR_FD] = { .type = NETLINK_TYPE_U32 },
+ [L2TP_ATTR_IP_SADDR] = { .type = NETLINK_TYPE_IN_ADDR },
+ [L2TP_ATTR_IP_DADDR] = { .type = NETLINK_TYPE_IN_ADDR },
+ [L2TP_ATTR_UDP_SPORT] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_UDP_DPORT] = { .type = NETLINK_TYPE_U16 },
+ [L2TP_ATTR_IP6_SADDR] = { .type = NETLINK_TYPE_IN_ADDR },
+ [L2TP_ATTR_IP6_DADDR] = { .type = NETLINK_TYPE_IN_ADDR },
+ [L2TP_ATTR_UDP_ZERO_CSUM6_TX] = { .type = NETLINK_TYPE_FLAG },
+ [L2TP_ATTR_UDP_ZERO_CSUM6_RX] = { .type = NETLINK_TYPE_FLAG },
+};
+
+static const NLTypeSystem genl_l2tp_type_system = {
+ .count = ELEMENTSOF(genl_l2tp_types),
+ .types = genl_l2tp_types,
+};
+
+static const NLType genl_l2tp[] = {
+ [L2TP_CMD_TUNNEL_CREATE] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_TUNNEL_DELETE] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_TUNNEL_MODIFY] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_TUNNEL_GET] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_SESSION_CREATE] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_SESSION_DELETE] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_SESSION_MODIFY] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+ [L2TP_CMD_SESSION_GET] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_type_system },
+};
+
+static const NLTypeSystem genl_l2tp_tunnel_session_type_system = {
+ .count = ELEMENTSOF(genl_l2tp),
+ .types = genl_l2tp,
+};
+
static const NLType genl_families[] = {
[SD_GENL_ID_CTRL] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_ctrl_id_ctrl_type_system },
[SD_GENL_WIREGUARD] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_wireguard_type_system },
[SD_GENL_FOU] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_fou_cmds_type_system},
+ [SD_GENL_L2TP] = { .type = NETLINK_TYPE_NESTED, .type_system = &genl_l2tp_tunnel_session_type_system },
};
const NLTypeSystem genl_family_type_system_root = {
netdev/netdevsim.h
netdev/fou-tunnel.c
netdev/fou-tunnel.h
+ netdev/l2tp-tunnel.c
+ netdev/l2tp-tunnel.h
networkd-address-label.c
networkd-address-label.h
networkd-address-pool.c
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <arpa/inet.h>
+#include <linux/l2tp.h>
+#include <linux/genetlink.h>
+
+#include "sd-netlink.h"
+
+#include "conf-parser.h"
+#include "hashmap.h"
+#include "l2tp-tunnel.h"
+#include "missing.h"
+#include "netlink-util.h"
+#include "networkd-manager.h"
+#include "parse-util.h"
+#include "socket-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "util.h"
+
+static const char* const l2tp_l2spec_type_table[_NETDEV_L2TP_L2SPECTYPE_MAX] = {
+ [NETDEV_L2TP_L2SPECTYPE_NONE] = "none",
+ [NETDEV_L2TP_L2SPECTYPE_DEFAULT] = "default",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_l2spec_type, L2tpL2specType);
+
+static const char* const l2tp_encap_type_table[_NETDEV_L2TP_ENCAPTYPE_MAX] = {
+ [NETDEV_L2TP_ENCAPTYPE_UDP] = "udp",
+ [NETDEV_L2TP_ENCAPTYPE_IP] = "ip",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_encap_type, L2tpEncapType);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_l2tp_encap_type, l2tp_encap_type, L2tpEncapType, "Failed to parse L2TP Encapsulation Type");
+
+static void l2tp_session_free(L2tpSession *s) {
+ if (!s)
+ return;
+
+ if (s->tunnel && s->section)
+ ordered_hashmap_remove(s->tunnel->sessions_by_section, s);
+
+ network_config_section_free(s->section);
+
+ free(s->name);
+
+ free(s);
+}
+
+DEFINE_NETWORK_SECTION_FUNCTIONS(L2tpSession, l2tp_session_free);
+
+static int l2tp_session_new_static(L2tpTunnel *t, const char *filename, unsigned section_line, L2tpSession **ret) {
+ _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
+ _cleanup_(l2tp_session_freep) L2tpSession *s = NULL;
+ int r;
+
+ assert(t);
+ assert(ret);
+ assert(filename);
+ assert(section_line > 0);
+
+ r = network_config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ s = ordered_hashmap_get(t->sessions_by_section, n);
+ if (s) {
+ *ret = TAKE_PTR(s);
+ return 0;
+ }
+
+ s = new(L2tpSession, 1);
+ if (!s)
+ return -ENOMEM;
+
+ *s = (L2tpSession) {
+ .l2tp_l2spec_type = NETDEV_L2TP_L2SPECTYPE_DEFAULT,
+ .tunnel = t,
+ .section = TAKE_PTR(n),
+ };
+
+ r = ordered_hashmap_ensure_allocated(&t->sessions_by_section, &network_config_hash_ops);
+ if (r < 0)
+ return r;
+
+ r = ordered_hashmap_put(t->sessions_by_section, s->section, s);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(s);
+ return 0;
+}
+
+static int netdev_l2tp_fill_message_tunnel(NetDev *netdev, sd_netlink_message **ret) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+ uint16_t encap_type;
+ L2tpTunnel *t;
+ int r;
+
+ assert(netdev);
+
+ t = L2TP(netdev);
+
+ assert(t);
+
+ r = sd_genl_message_new(netdev->manager->genl, SD_GENL_L2TP, L2TP_CMD_TUNNEL_CREATE, &m);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Failed to create generic netlink message: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, t->tunnel_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_CONN_ID attribute: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, t->peer_tunnel_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_CONN_ID attribute: %m");
+
+ r = sd_netlink_message_append_u8(m, L2TP_ATTR_PROTO_VERSION, 3);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PROTO_VERSION attribute: %m");
+
+ switch(t->l2tp_encap_type) {
+ case NETDEV_L2TP_ENCAPTYPE_IP:
+ encap_type = L2TP_ENCAPTYPE_IP;
+ break;
+ case NETDEV_L2TP_ENCAPTYPE_UDP:
+ default:
+ encap_type = L2TP_ENCAPTYPE_UDP;
+ break;
+ }
+
+ r = sd_netlink_message_append_u16(m, L2TP_ATTR_ENCAP_TYPE, encap_type);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_ENCAP_TYPE attribute: %m");
+
+ if (t->family == AF_INET) {
+ r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_SADDR, &t->local.in);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP_SADDR attribute: %m");
+
+ r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_DADDR, &t->remote.in);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP_DADDR attribute: %m");
+ } else {
+ r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_SADDR, &t->local.in6);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP6_SADDR attribute: %m");
+
+ r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_DADDR, &t->remote.in6);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IP6_DADDR attribute: %m");
+ }
+
+ if (encap_type == L2TP_ENCAPTYPE_UDP) {
+ r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_SPORT, t->l2tp_udp_sport);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_SPORT, attribute: %m");
+
+ r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_DPORT, t->l2tp_udp_dport);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_DPORT attribute: %m");
+
+ if (t->udp_csum) {
+ r = sd_netlink_message_append_u8(m, L2TP_ATTR_UDP_CSUM, t->udp_csum);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_CSUM attribute: %m");
+ }
+
+ if (t->udp6_csum_tx) {
+ r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_TX);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_ZERO_CSUM6_TX attribute: %m");
+ }
+
+ if (t->udp6_csum_rx) {
+ r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_RX);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_UDP_ZERO_CSUM6_RX attribute: %m");
+ }
+ }
+
+ *ret = TAKE_PTR(m);
+
+ return 0;
+}
+
+static int netdev_l2tp_fill_message_session(NetDev *netdev, L2tpSession *session, sd_netlink_message **ret) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+ uint16_t l2_spec_len;
+ uint8_t l2_spec_type;
+ int r;
+
+ assert(netdev);
+ assert(session);
+ assert(session->tunnel);
+
+ r = sd_genl_message_new(netdev->manager->genl, SD_GENL_L2TP, L2TP_CMD_SESSION_CREATE, &m);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Failed to create generic netlink message: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, session->tunnel->tunnel_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_CONN_ID attribute: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, session->tunnel->peer_tunnel_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_CONN_ID attribute: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_SESSION_ID, session->session_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_SESSION_ID attribute: %m");
+
+ r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PEER_SESSION_ID attribute: %m");
+
+ r = sd_netlink_message_append_u16(m, L2TP_ATTR_PW_TYPE, L2TP_PWTYPE_ETH);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_PW_TYPE attribute: %m");
+
+ switch (session->l2tp_l2spec_type) {
+ case NETDEV_L2TP_L2SPECTYPE_NONE:
+ l2_spec_type = L2TP_L2SPECTYPE_NONE;
+ l2_spec_len = 0;
+ break;
+ case NETDEV_L2TP_L2SPECTYPE_DEFAULT:
+ default:
+ l2_spec_type = L2TP_L2SPECTYPE_DEFAULT;
+ l2_spec_len = 4;
+ break;
+ }
+
+ r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_TYPE, l2_spec_type);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_L2SPEC_TYPE attribute: %m");
+
+ r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_LEN, l2_spec_len);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_L2SPEC_LEN attribute: %m");
+
+ r = sd_netlink_message_append_string(m, L2TP_ATTR_IFNAME, session->name);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Could not append L2TP_ATTR_IFNAME attribute: %m");
+
+ *ret = TAKE_PTR(m);
+
+ return 0;
+}
+
+static int netdev_l2tp_tunnel_create(NetDev *netdev, Link *link) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
+ L2tpTunnel *t;
+ L2tpSession *session;
+ uint32_t serial;
+ Iterator i;
+ int r;
+
+ assert(netdev);
+
+ t = L2TP(netdev);
+
+ assert(t);
+
+ r = netdev_l2tp_fill_message_tunnel(netdev, &m);
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_send(netdev->manager->genl, m, &serial);
+ if (r < 0)
+ return log_netdev_error_errno(netdev, r, "Failed to create L2TP tunnel: %m");
+
+ log_netdev_debug(netdev, "L2TP tunnel created");
+
+ ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section, i) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *n = NULL;
+
+ r = netdev_l2tp_fill_message_session(netdev, session, &n);
+ if (r < 0)
+ continue;
+
+ r = sd_netlink_send(netdev->manager->genl, n, &serial);
+ if (r < 0)
+ log_netdev_error_errno(netdev, r, "Failed to create L2TP session %s: %m", session->name);
+
+ log_netdev_debug(netdev, "L2TP session %s created", session->name);
+ }
+
+ return 0;
+}
+
+int config_parse_l2tp_tunnel_address(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ L2tpTunnel *t = userdata;
+ union in_addr_union *addr = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (t->family == AF_UNSPEC)
+ r = in_addr_from_string_auto(rvalue, &t->family, addr);
+ else
+ r = in_addr_from_string(t->family, rvalue, addr);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Invalid L2TP Tunnel address specified in %s='%s', ignoring assignment: %m", lvalue, rvalue);
+ return 0;
+ }
+
+ return 0;
+}
+
+int config_parse_l2tp_tunnel_id(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ uint32_t *id = data, k;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = safe_atou32(rvalue, &k);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse L2TP tunnel id. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ if (k == 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Invalid L2TP tunnel id. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ *id = k;
+
+ return 0;
+}
+
+int config_parse_l2tp_session_id(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+ L2tpTunnel *t = userdata;
+ uint32_t k;
+ int r;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = l2tp_session_new_static(t, filename, section_line, &session);
+ if (r < 0)
+ return r;
+
+ r = safe_atou32(rvalue, &k);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Failed to parse L2TP session id. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ if (k == 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r,
+ "Invalid L2TP session id. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ if (streq(lvalue, "SessionId"))
+ session->session_id = k;
+ else
+ session->peer_session_id = k;
+
+ session = NULL;
+ return 0;
+}
+
+int config_parse_l2tp_session_l2spec(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+ L2tpTunnel *t = userdata;
+ L2tpL2specType spec;
+ int r;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = l2tp_session_new_static(t, filename, section_line, &session);
+ if (r < 0)
+ return r;
+
+ spec = l2tp_l2spec_type_from_string(rvalue);
+ if (spec < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Failed to parse layer2 specific header type. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ session->l2tp_l2spec_type = spec;
+
+ session = NULL;
+ return 0;
+}
+
+int config_parse_l2tp_session_name(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(l2tp_session_free_or_set_invalidp) L2tpSession *session = NULL;
+ L2tpTunnel *t = userdata;
+ int r;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = l2tp_session_new_static(t, filename, section_line, &session);
+ if (r < 0)
+ return r;
+
+ if (!ifname_valid(rvalue)) {
+ log_syntax(unit, LOG_ERR, filename, line, 0,
+ "Failed to parse L2TP tunnel session name. Ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ session->name = strdup(rvalue);
+ if (!session->name)
+ return -ENOMEM;
+
+ session = NULL;
+ return 0;
+}
+
+static void l2tp_tunnel_init(NetDev *netdev) {
+ L2tpTunnel *t;
+
+ assert(netdev);
+
+ t = L2TP(netdev);
+
+ assert(t);
+
+ t->l2tp_encap_type = NETDEV_L2TP_ENCAPTYPE_UDP;
+ t->udp6_csum_rx = true;
+ t->udp6_csum_tx = true;
+}
+
+static int l2tp_session_verify(L2tpSession *session) {
+ NetDev *netdev;
+
+ assert(session);
+ assert(session->tunnel);
+
+ netdev = NETDEV(session->tunnel);
+
+ if (section_is_invalid(session->section))
+ return -EINVAL;
+
+ if (!session->name)
+ return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+ "%s: L2TP session without name configured. "
+ "Ignoring [L2TPSession] section from line %u",
+ session->section->filename, session->section->line);
+
+ if (session->session_id == 0 || session->peer_session_id == 0)
+ return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+ "%s: L2TP session without session IDs configured. "
+ "Ignoring [L2TPSession] section from line %u",
+ session->section->filename, session->section->line);
+
+ return 0;
+}
+
+static int netdev_l2tp_tunnel_verify(NetDev *netdev, const char *filename) {
+ L2tpTunnel *t;
+ L2tpSession *session;
+ Iterator i;
+
+ assert(netdev);
+ assert(filename);
+
+ t = L2TP(netdev);
+
+ assert(t);
+
+ if (!IN_SET(t->family, AF_INET, AF_INET6))
+ return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+ "%s: L2TP tunnel with invalid address family configured. Ignoring",
+ filename);
+
+ if (in_addr_is_null(t->family, &t->local) || in_addr_is_null(t->family, &t->remote))
+ return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+ "%s: L2TP tunnel without a local or remote address configured. Ignoring",
+ filename);
+
+ if (t->tunnel_id == 0 || t->peer_tunnel_id == 0)
+ return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
+ "%s: L2TP tunnel without tunnel IDs configured. Ignoring",
+ filename);
+
+ ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section, i)
+ if (l2tp_session_verify(session) < 0)
+ l2tp_session_free(session);
+
+ return 0;
+}
+
+static void l2tp_tunnel_done(NetDev *netdev) {
+ L2tpTunnel *t;
+
+ assert(netdev);
+
+ t = L2TP(netdev);
+
+ assert(t);
+
+ ordered_hashmap_free_with_destructor(t->sessions_by_section, l2tp_session_free);
+}
+
+const NetDevVTable l2tptnl_vtable = {
+ .object_size = sizeof(L2tpTunnel),
+ .init = l2tp_tunnel_init,
+ .sections = "Match\0NetDev\0L2TP\0L2TPSession",
+ .create_after_configured = netdev_l2tp_tunnel_create,
+ .done = l2tp_tunnel_done,
+ .create_type = NETDEV_CREATE_AFTER_CONFIGURED,
+ .config_verify = netdev_l2tp_tunnel_verify,
+};
--- /dev/null
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <linux/l2tp.h>
+
+#include "in-addr-util.h"
+#include "netdev.h"
+#include "networkd-util.h"
+
+typedef enum L2tpL2specType {
+ NETDEV_L2TP_L2SPECTYPE_NONE = L2TP_L2SPECTYPE_NONE,
+ NETDEV_L2TP_L2SPECTYPE_DEFAULT = L2TP_L2SPECTYPE_DEFAULT,
+ _NETDEV_L2TP_L2SPECTYPE_MAX,
+ _NETDEV_L2TP_L2SPECTYPE_INVALID = -1,
+} L2tpL2specType;
+
+typedef enum L2tpEncapType {
+ NETDEV_L2TP_ENCAPTYPE_UDP = L2TP_ENCAPTYPE_UDP,
+ NETDEV_L2TP_ENCAPTYPE_IP = L2TP_ENCAPTYPE_IP,
+ _NETDEV_L2TP_ENCAPTYPE_MAX,
+ _NETDEV_L2TP_ENCAPTYPE_INVALID = -1,
+} L2tpEncapType;
+
+typedef struct L2tpTunnel L2tpTunnel;
+
+typedef struct L2tpSession {
+ L2tpTunnel *tunnel;
+ NetworkConfigSection *section;
+
+ char *name;
+
+ uint32_t session_id;
+ uint32_t peer_session_id;
+ L2tpL2specType l2tp_l2spec_type;
+} L2tpSession;
+
+struct L2tpTunnel {
+ NetDev meta;
+
+ uint16_t l2tp_udp_sport;
+ uint16_t l2tp_udp_dport;
+
+ uint32_t tunnel_id;
+ uint32_t peer_tunnel_id;
+
+ int family;
+
+ bool udp_csum;
+ bool udp6_csum_rx;
+ bool udp6_csum_tx;
+
+ union in_addr_union local;
+ union in_addr_union remote;
+
+ L2tpEncapType l2tp_encap_type;
+
+ OrderedHashmap *sessions_by_section;
+};
+
+DEFINE_NETDEV_CAST(L2TP, L2tpTunnel);
+extern const NetDevVTable l2tptnl_vtable;
+
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_tunnel_address);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_tunnel_id);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_encap_type);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_l2spec);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_id);
+CONFIG_PARSER_PROTOTYPE(config_parse_l2tp_session_name);
#include "netdev/vxcan.h"
#include "netdev/wireguard.h"
#include "netdev/fou-tunnel.h"
+#include "netdev/l2tp-tunnel.h"
#include "vlan-util.h"
%}
struct ConfigPerfItem;
FooOverUDP.Protocol, config_parse_uint8, 0, offsetof(FouTunnel, fou_protocol)
FooOverUDP.Encapsulation, config_parse_fou_encap_type, 0, offsetof(FouTunnel, fou_encap_type)
FooOverUDP.Port, config_parse_ip_port, 0, offsetof(FouTunnel, port)
+L2TP.TunnelId, config_parse_l2tp_tunnel_id, 0, offsetof(L2tpTunnel, tunnel_id)
+L2TP.PeerTunnelId, config_parse_l2tp_tunnel_id, 0, offsetof(L2tpTunnel, peer_tunnel_id)
+L2TP.UDPSourcePort, config_parse_ip_port, 0, offsetof(L2tpTunnel, l2tp_udp_sport)
+L2TP.UDPDestinationPort, config_parse_ip_port, 0, offsetof(L2tpTunnel, l2tp_udp_dport)
+L2TP.Local, config_parse_l2tp_tunnel_address, 0, offsetof(L2tpTunnel, local)
+L2TP.Remote, config_parse_l2tp_tunnel_address, 0, offsetof(L2tpTunnel, remote)
+L2TP.EncapsulationType, config_parse_l2tp_encap_type, 0, offsetof(L2tpTunnel, l2tp_encap_type)
+L2TP.UDPCheckSum, config_parse_bool, 0, offsetof(L2tpTunnel, udp_csum)
+L2TP.UDP6CheckSumRx, config_parse_bool, 0, offsetof(L2tpTunnel, udp6_csum_rx)
+L2TP.UDP6CheckSumTx, config_parse_bool, 0, offsetof(L2tpTunnel, udp6_csum_tx)
+L2TPSession.SessionId, config_parse_l2tp_session_id, 0, 0
+L2TPSession.PeerSessionId, config_parse_l2tp_session_id, 0, 0
+L2TPSession.Layer2SpecificHeader, config_parse_l2tp_session_l2spec, 0, 0
+L2TPSession.Name, config_parse_l2tp_session_name, 0, 0
Peer.Name, config_parse_ifname, 0, offsetof(Veth, ifname_peer)
Peer.MACAddress, config_parse_hwaddr, 0, offsetof(Veth, mac_peer)
VXCAN.Peer, config_parse_ifname, 0, offsetof(VxCan, ifname_peer)
#include "conf-parser.h"
#include "fd-util.h"
#include "list.h"
-#include "netlink-util.h"
-#include "network-internal.h"
-#include "netdev/netdev.h"
-#include "networkd-manager.h"
-#include "networkd-link.h"
-#include "siphash24.h"
-#include "stat-util.h"
-#include "string-table.h"
-#include "string-util.h"
-#include "strv.h"
-
-#include "netdev/bridge.h"
#include "netdev/bond.h"
+#include "netdev/bridge.h"
+#include "netdev/dummy.h"
+#include "netdev/fou-tunnel.h"
#include "netdev/geneve.h"
-#include "netdev/vlan.h"
-#include "netdev/macvlan.h"
#include "netdev/ipvlan.h"
-#include "netdev/vxlan.h"
+#include "netdev/l2tp-tunnel.h"
+#include "netdev/macvlan.h"
+#include "netdev/netdev.h"
+#include "netdev/netdevsim.h"
#include "netdev/tunnel.h"
#include "netdev/tuntap.h"
+#include "netdev/vcan.h"
#include "netdev/veth.h"
-#include "netdev/dummy.h"
+#include "netdev/vlan.h"
#include "netdev/vrf.h"
-#include "netdev/vcan.h"
#include "netdev/vxcan.h"
+#include "netdev/vxlan.h"
#include "netdev/wireguard.h"
-#include "netdev/netdevsim.h"
-#include "netdev/fou-tunnel.h"
+#include "netlink-util.h"
+#include "network-internal.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "siphash24.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
const NetDevVTable * const netdev_vtable[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_BRIDGE] = &bridge_vtable,
[NETDEV_KIND_NETDEVSIM] = &netdevsim_vtable,
[NETDEV_KIND_FOU] = &foutnl_vtable,
[NETDEV_KIND_ERSPAN] = &erspan_vtable,
+ [NETDEV_KIND_L2TP] = &l2tptnl_vtable,
};
static const char* const netdev_kind_table[_NETDEV_KIND_MAX] = {
[NETDEV_KIND_NETDEVSIM] = "netdevsim",
[NETDEV_KIND_FOU] = "fou",
[NETDEV_KIND_ERSPAN] = "erspan",
+ [NETDEV_KIND_L2TP] = "l2tp",
};
DEFINE_STRING_TABLE_LOOKUP(netdev_kind, NetDevKind);
NETDEV_KIND_NETDEVSIM,
NETDEV_KIND_FOU,
NETDEV_KIND_ERSPAN,
+ NETDEV_KIND_L2TP,
_NETDEV_KIND_MAX,
_NETDEV_KIND_TUNNEL, /* Used by config_parse_stacked_netdev() */
_NETDEV_KIND_INVALID = -1
Network.MACVTAP, config_parse_stacked_netdev, NETDEV_KIND_MACVTAP, offsetof(Network, stacked_netdev_names)
Network.IPVLAN, config_parse_stacked_netdev, NETDEV_KIND_IPVLAN, offsetof(Network, stacked_netdev_names)
Network.VXLAN, config_parse_stacked_netdev, NETDEV_KIND_VXLAN, offsetof(Network, stacked_netdev_names)
+Network.L2TP, config_parse_stacked_netdev, NETDEV_KIND_L2TP, offsetof(Network, stacked_netdev_names)
Network.Tunnel, config_parse_stacked_netdev, _NETDEV_KIND_TUNNEL, offsetof(Network, stacked_netdev_names)
Network.VRF, config_parse_ifname, 0, offsetof(Network, vrf_name)
Network.DHCP, config_parse_dhcp, 0, offsetof(Network, dhcp)
assert(data);
assert(IN_SET(kind,
NETDEV_KIND_VLAN, NETDEV_KIND_MACVLAN, NETDEV_KIND_MACVTAP,
- NETDEV_KIND_IPVLAN, NETDEV_KIND_VXLAN, _NETDEV_KIND_TUNNEL));
+ NETDEV_KIND_IPVLAN, NETDEV_KIND_VXLAN, NETDEV_KIND_L2TP,
+ _NETDEV_KIND_TUNNEL));
if (!ifname_valid(rvalue)) {
log_syntax(unit, LOG_ERR, filename, line, 0,
typedef struct sd_genl_socket sd_genl_socket;
typedef struct sd_netlink_message sd_netlink_message;
typedef struct sd_netlink_slot sd_netlink_slot;
-typedef enum {SD_GENL_ID_CTRL, SD_GENL_WIREGUARD, SD_GENL_FOU} sd_genl_family;
+
+typedef enum sd_gen_family {
+ SD_GENL_ID_CTRL,
+ SD_GENL_WIREGUARD,
+ SD_GENL_FOU,
+ SD_GENL_L2TP,
+} sd_genl_family;
/* callback */
MTUBytes=
Description=
Name=
+[L2TP]
+TunnelId=
+PeerTunnelId=
+UDPSourcePort=
+UDPDestinationPort=
+Local=
+Remote=
+EncapsulationType=
+UDPCheckSum=
+UDP6CheckSumRx=
+UDP6CheckSumTx=
+[L2TPSession]
+SessionId=
+PeerSessionId=
+Layer2SpecificHeader=
+Name=
IPv6Token=
Description=
VXLAN=
+L2TP=
LinkLocalAddressing=
ConfigureWithoutCarrier=
NTP=
projects / thirdparty / systemd.git / commitdiff
