| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <netinet/in.h> |
| #include <linux/l2tp.h> |
| #include <linux/genetlink.h> |
| |
| #include "conf-parser.h" |
| #include "hashmap.h" |
| #include "l2tp-tunnel.h" |
| #include "netlink-util.h" |
| #include "networkd-address.h" |
| #include "networkd-manager.h" |
| #include "networkd-route-util.h" |
| #include "parse-util.h" |
| #include "socket-util.h" |
| #include "string-table.h" |
| #include "string-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 const char* const l2tp_local_address_type_table[_NETDEV_L2TP_LOCAL_ADDRESS_MAX] = { |
| [NETDEV_L2TP_LOCAL_ADDRESS_AUTO] = "auto", |
| [NETDEV_L2TP_LOCAL_ADDRESS_STATIC] = "static", |
| [NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC] = "dynamic", |
| }; |
| |
| DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(l2tp_local_address_type, L2tpLocalAddressType); |
| |
| static L2tpSession* l2tp_session_free(L2tpSession *s) { |
| if (!s) |
| return NULL; |
| |
| if (s->tunnel && s->section) |
| ordered_hashmap_remove(s->tunnel->sessions_by_section, s->section); |
| |
| config_section_free(s->section); |
| free(s->name); |
| return mfree(s); |
| } |
| |
| DEFINE_SECTION_CLEANUP_FUNCTIONS(L2tpSession, l2tp_session_free); |
| |
| static int l2tp_session_new_static(L2tpTunnel *t, const char *filename, unsigned section_line, L2tpSession **ret) { |
| _cleanup_(config_section_freep) ConfigSection *n = NULL; |
| _cleanup_(l2tp_session_freep) L2tpSession *s = NULL; |
| int r; |
| |
| assert(t); |
| assert(ret); |
| assert(filename); |
| assert(section_line > 0); |
| |
| r = 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_put(&t->sessions_by_section, &config_section_hash_ops, s->section, s); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(s); |
| return 0; |
| } |
| |
| static int netdev_l2tp_create_message_tunnel(NetDev *netdev, union in_addr_union *local_address, sd_netlink_message **ret) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| uint16_t encap_type; |
| L2tpTunnel *t; |
| int r; |
| |
| assert(netdev); |
| assert(local_address); |
| assert_se(t = L2TP(netdev)); |
| |
| r = sd_genl_message_new(netdev->manager->genl, L2TP_GENL_NAME, L2TP_CMD_TUNNEL_CREATE, &m); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, t->tunnel_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, t->peer_tunnel_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u8(m, L2TP_ATTR_PROTO_VERSION, 3); |
| if (r < 0) |
| return r; |
| |
| 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 r; |
| |
| if (t->family == AF_INET) { |
| r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_SADDR, &local_address->in); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_in_addr(m, L2TP_ATTR_IP_DADDR, &t->remote.in); |
| if (r < 0) |
| return r; |
| } else { |
| r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_SADDR, &local_address->in6); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_in6_addr(m, L2TP_ATTR_IP6_DADDR, &t->remote.in6); |
| if (r < 0) |
| return r; |
| } |
| |
| 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 r; |
| |
| r = sd_netlink_message_append_u16(m, L2TP_ATTR_UDP_DPORT, t->l2tp_udp_dport); |
| if (r < 0) |
| return r; |
| |
| if (t->udp_csum) { |
| r = sd_netlink_message_append_u8(m, L2TP_ATTR_UDP_CSUM, t->udp_csum); |
| if (r < 0) |
| return r; |
| } |
| |
| if (t->udp6_csum_tx) { |
| r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_TX); |
| if (r < 0) |
| return r; |
| } |
| |
| if (t->udp6_csum_rx) { |
| r = sd_netlink_message_append_flag(m, L2TP_ATTR_UDP_ZERO_CSUM6_RX); |
| if (r < 0) |
| return r; |
| } |
| } |
| |
| *ret = TAKE_PTR(m); |
| |
| return 0; |
| } |
| |
| static int netdev_l2tp_create_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, L2TP_GENL_NAME, L2TP_CMD_SESSION_CREATE, &m); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_CONN_ID, session->tunnel->tunnel_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_CONN_ID, session->tunnel->peer_tunnel_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_SESSION_ID, session->session_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u32(m, L2TP_ATTR_PEER_SESSION_ID, session->peer_session_id); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_u16(m, L2TP_ATTR_PW_TYPE, L2TP_PWTYPE_ETH); |
| if (r < 0) |
| return r; |
| |
| 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 r; |
| |
| r = sd_netlink_message_append_u8(m, L2TP_ATTR_L2SPEC_LEN, l2_spec_len); |
| if (r < 0) |
| return r; |
| |
| r = sd_netlink_message_append_string(m, L2TP_ATTR_IFNAME, session->name); |
| if (r < 0) |
| return r; |
| |
| *ret = TAKE_PTR(m); |
| |
| return 0; |
| } |
| |
| static int link_get_l2tp_local_address(Link *link, L2tpTunnel *t, union in_addr_union *ret) { |
| Address *a; |
| |
| assert(link); |
| assert(t); |
| |
| SET_FOREACH(a, link->addresses) { |
| if (!address_is_ready(a)) |
| continue; |
| |
| if (a->family != t->family) |
| continue; |
| |
| if (in_addr_is_set(a->family, &a->in_addr_peer)) |
| continue; |
| |
| if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_STATIC && |
| !FLAGS_SET(a->flags, IFA_F_PERMANENT)) |
| continue; |
| |
| if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC && |
| FLAGS_SET(a->flags, IFA_F_PERMANENT)) |
| continue; |
| |
| if (ret) |
| *ret = a->in_addr; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static int l2tp_get_local_address(NetDev *netdev, union in_addr_union *ret) { |
| Link *link = NULL; |
| L2tpTunnel *t; |
| Address *a = NULL; |
| int r; |
| |
| assert(netdev); |
| assert(netdev->manager); |
| assert_se(t = L2TP(netdev)); |
| |
| if (t->local_ifname) { |
| r = link_get_by_name(netdev->manager, t->local_ifname, &link); |
| if (r < 0) |
| return r; |
| |
| if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) |
| return -EBUSY; |
| } |
| |
| if (netdev->manager->manage_foreign_routes) { |
| /* First, check if the remote address is accessible. */ |
| if (link) |
| r = link_address_is_reachable(link, t->family, &t->remote, &t->local, &a); |
| else |
| r = manager_address_is_reachable(netdev->manager, t->family, &t->remote, &t->local, &a); |
| if (r < 0) |
| return r; |
| } |
| |
| if (in_addr_is_set(t->family, &t->local)) { |
| /* local address is explicitly specified. */ |
| |
| if (!a) { |
| if (link) |
| r = link_get_address(link, t->family, &t->local, 0, &a); |
| else |
| r = manager_get_address(netdev->manager, t->family, &t->local, 0, &a); |
| if (r < 0) |
| return r; |
| |
| if (!address_is_ready(a)) |
| return -EBUSY; |
| } |
| |
| if (ret) |
| *ret = a->in_addr; |
| |
| return 0; |
| } |
| |
| if (a) { |
| if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_STATIC && |
| !FLAGS_SET(a->flags, IFA_F_PERMANENT)) |
| return -EINVAL; |
| |
| if (t->local_address_type == NETDEV_L2TP_LOCAL_ADDRESS_DYNAMIC && |
| FLAGS_SET(a->flags, IFA_F_PERMANENT)) |
| return -EINVAL; |
| |
| if (ret) |
| *ret = a->in_addr; |
| |
| return 0; |
| } |
| |
| if (link) |
| return link_get_l2tp_local_address(link, t, ret); |
| |
| HASHMAP_FOREACH(link, netdev->manager->links_by_index) { |
| if (!link_is_ready_to_configure(link, /* allow_unmanaged = */ false)) |
| continue; |
| |
| if (link_get_l2tp_local_address(link, t, ret) >= 0) |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| |
| static void l2tp_session_destroy_callback(L2tpSession *session) { |
| if (!session) |
| return; |
| |
| netdev_unref(NETDEV(session->tunnel)); |
| } |
| |
| static int l2tp_create_session_handler(sd_netlink *rtnl, sd_netlink_message *m, L2tpSession *session) { |
| NetDev *netdev; |
| int r; |
| |
| assert(session); |
| assert(session->tunnel); |
| |
| netdev = NETDEV(session->tunnel); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r == -EEXIST) |
| log_netdev_info(netdev, "L2TP session %s exists, using existing without changing its parameters", |
| session->name); |
| else if (r < 0) { |
| log_netdev_warning_errno(netdev, r, "L2TP session %s could not be created: %m", session->name); |
| return 1; |
| } |
| |
| log_netdev_debug(netdev, "L2TP session %s created", session->name); |
| return 1; |
| } |
| |
| static int l2tp_create_session(NetDev *netdev, L2tpSession *session) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *n = NULL; |
| int r; |
| |
| r = netdev_l2tp_create_message_session(netdev, session, &n); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m"); |
| |
| r = netlink_call_async(netdev->manager->genl, NULL, n, l2tp_create_session_handler, |
| l2tp_session_destroy_callback, session); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Failed to create L2TP session %s: %m", session->name); |
| |
| netdev_ref(netdev); |
| return 0; |
| } |
| |
| static int l2tp_create_tunnel_handler(sd_netlink *rtnl, sd_netlink_message *m, NetDev *netdev) { |
| L2tpSession *session; |
| L2tpTunnel *t; |
| int r; |
| |
| assert(netdev); |
| assert(netdev->state != _NETDEV_STATE_INVALID); |
| |
| t = L2TP(netdev); |
| |
| assert(t); |
| |
| r = sd_netlink_message_get_errno(m); |
| if (r == -EEXIST) |
| log_netdev_info(netdev, "netdev exists, using existing without changing its parameters"); |
| else if (r < 0) { |
| log_netdev_warning_errno(netdev, r, "netdev could not be created: %m"); |
| netdev_enter_failed(netdev); |
| |
| return 1; |
| } |
| |
| log_netdev_debug(netdev, "L2TP tunnel is created"); |
| |
| ORDERED_HASHMAP_FOREACH(session, t->sessions_by_section) |
| (void) l2tp_create_session(netdev, session); |
| |
| return 1; |
| } |
| |
| static int l2tp_create_tunnel(NetDev *netdev) { |
| _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL; |
| union in_addr_union local_address; |
| L2tpTunnel *t; |
| int r; |
| |
| assert(netdev); |
| assert_se(t = L2TP(netdev)); |
| |
| r = l2tp_get_local_address(netdev, &local_address); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Could not find local address."); |
| |
| if (t->local_address_type >= 0 && DEBUG_LOGGING) |
| log_netdev_debug(netdev, "Local address %s acquired.", |
| IN_ADDR_TO_STRING(t->family, &local_address)); |
| |
| r = netdev_l2tp_create_message_tunnel(netdev, &local_address, &m); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Failed to create netlink message: %m"); |
| |
| r = netlink_call_async(netdev->manager->genl, NULL, m, l2tp_create_tunnel_handler, |
| netdev_destroy_callback, netdev); |
| if (r < 0) |
| return log_netdev_error_errno(netdev, r, "Failed to create L2TP tunnel: %m"); |
| |
| netdev_ref(netdev); |
| |
| return 0; |
| } |
| |
| static int netdev_l2tp_is_ready_to_create(NetDev *netdev, Link *link) { |
| return l2tp_get_local_address(netdev, NULL) >= 0; |
| } |
| |
| int config_parse_l2tp_tunnel_local_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) { |
| |
| _cleanup_free_ char *addr_or_type = NULL, *ifname = NULL; |
| L2tpLocalAddressType type; |
| L2tpTunnel *t = ASSERT_PTR(userdata); |
| const char *p = ASSERT_PTR(rvalue); |
| union in_addr_union a; |
| int r, f; |
| |
| assert(filename); |
| assert(lvalue); |
| |
| if (isempty(rvalue)) { |
| t->local_ifname = mfree(t->local_ifname); |
| t->local_address_type = NETDEV_L2TP_LOCAL_ADDRESS_AUTO; |
| t->local = IN_ADDR_NULL; |
| |
| if (!in_addr_is_set(t->family, &t->remote)) |
| /* If Remote= is not specified yet, then also clear family. */ |
| t->family = AF_UNSPEC; |
| |
| return 0; |
| } |
| |
| r = extract_first_word(&p, &addr_or_type, "@", 0); |
| if (r < 0) |
| return log_oom(); |
| if (r == 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid L2TP Tunnel address specified in %s=, ignoring assignment: %s", lvalue, rvalue); |
| return 0; |
| } |
| |
| if (!isempty(p)) { |
| if (!ifname_valid_full(p, IFNAME_VALID_ALTERNATIVE)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Invalid interface name specified in %s=, ignoring assignment: %s", lvalue, rvalue); |
| return 0; |
| } |
| |
| ifname = strdup(p); |
| if (!ifname) |
| return log_oom(); |
| } |
| |
| type = l2tp_local_address_type_from_string(addr_or_type); |
| if (type >= 0) { |
| free_and_replace(t->local_ifname, ifname); |
| t->local_address_type = type; |
| t->local = IN_ADDR_NULL; |
| |
| if (!in_addr_is_set(t->family, &t->remote)) |
| /* If Remote= is not specified yet, then also clear family. */ |
| t->family = AF_UNSPEC; |
| |
| return 0; |
| } |
| |
| r = in_addr_from_string_auto(addr_or_type, &f, &a); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid L2TP Tunnel local address \"%s\" specified, ignoring assignment: %s", addr_or_type, rvalue); |
| return 0; |
| } |
| |
| if (in_addr_is_null(f, &a)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "L2TP Tunnel local address cannot be null, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| if (t->family != AF_UNSPEC && t->family != f) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Address family does not match the previous assignment, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| t->family = f; |
| t->local = a; |
| free_and_replace(t->local_ifname, ifname); |
| t->local_address_type = _NETDEV_L2TP_LOCAL_ADDRESS_INVALID; |
| return 0; |
| } |
| |
| int config_parse_l2tp_tunnel_remote_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 = ASSERT_PTR(userdata); |
| union in_addr_union a; |
| int r, f; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| |
| if (isempty(rvalue)) { |
| t->remote = IN_ADDR_NULL; |
| |
| if (!in_addr_is_set(t->family, &t->local)) |
| /* If Local= is not specified yet, then also clear family. */ |
| t->family = AF_UNSPEC; |
| |
| return 0; |
| } |
| |
| r = in_addr_from_string_auto(rvalue, &f, &a); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Invalid L2TP Tunnel remote address specified, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| if (in_addr_is_null(f, &a)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "L2TP Tunnel remote address cannot be null, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| if (t->family != AF_UNSPEC && t->family != f) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Address family does not match the previous assignment, ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| t->family = f; |
| t->remote = a; |
| 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_WARNING, filename, line, r, |
| "Failed to parse L2TP tunnel id. Ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| if (k == 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "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 log_oom(); |
| |
| r = safe_atou32(rvalue, &k); |
| if (r < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, r, |
| "Failed to parse L2TP session id. Ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| if (k == 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "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 log_oom(); |
| |
| spec = l2tp_l2spec_type_from_string(rvalue); |
| if (spec < 0) { |
| log_syntax(unit, LOG_WARNING, filename, line, spec, |
| "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 log_oom(); |
| |
| if (!ifname_valid(rvalue)) { |
| log_syntax(unit, LOG_WARNING, filename, line, 0, |
| "Failed to parse L2TP tunnel session name. Ignoring assignment: %s", rvalue); |
| return 0; |
| } |
| |
| r = free_and_strdup(&session->name, rvalue); |
| if (r < 0) |
| return log_oom(); |
| |
| 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; |
| |
| 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_set(t->family, &t->remote)) |
| return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL), |
| "%s: L2TP tunnel without a 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) |
| 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); |
| free(t->local_ifname); |
| } |
| |
| const NetDevVTable l2tptnl_vtable = { |
| .object_size = sizeof(L2tpTunnel), |
| .init = l2tp_tunnel_init, |
| .sections = NETDEV_COMMON_SECTIONS "L2TP\0L2TPSession\0", |
| .create = l2tp_create_tunnel, |
| .done = l2tp_tunnel_done, |
| .create_type = NETDEV_CREATE_INDEPENDENT, |
| .is_ready_to_create = netdev_l2tp_is_ready_to_create, |
| .config_verify = netdev_l2tp_tunnel_verify, |
| }; |
