1138 lines
38 KiB
C
1138 lines
38 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <netinet/in.h>
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#include <linux/fou.h>
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#include <linux/if_arp.h>
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#include <linux/if_tunnel.h>
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#include <linux/ip.h>
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#include <linux/ip6_tunnel.h>
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#include "conf-parser.h"
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#include "hexdecoct.h"
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#include "missing_network.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "parse-util.h"
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#include "siphash24.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "tunnel.h"
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#include "util.h"
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#define DEFAULT_IPV6_TTL 64
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#define IP6_FLOWINFO_FLOWLABEL htobe32(0x000FFFFF)
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#define IP6_TNL_F_ALLOW_LOCAL_REMOTE 0x40
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static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = {
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[NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6",
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[NETDEV_IP6_TNL_MODE_IPIP6] = "ipip6",
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[NETDEV_IP6_TNL_MODE_ANYIP6] = "any",
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};
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DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode, Ip6TnlMode);
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DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode, ip6tnl_mode, Ip6TnlMode, "Failed to parse ip6 tunnel Mode");
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#define HASH_KEY SD_ID128_MAKE(74,c4,de,12,f3,d9,41,34,bb,3d,c1,a4,42,93,50,87)
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int dhcp4_pd_create_6rd_tunnel_name(Link *link, char **ret) {
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_cleanup_free_ char *ifname_alloc = NULL;
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uint8_t ipv4masklen, sixrd_prefixlen, *buf, *p;
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struct in_addr ipv4address;
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struct in6_addr sixrd_prefix;
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char ifname[IFNAMSIZ];
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uint64_t result;
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size_t sz;
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int r;
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assert(link);
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assert(link->dhcp_lease);
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r = sd_dhcp_lease_get_address(link->dhcp_lease, &ipv4address);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to get DHCPv4 address: %m");
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r = sd_dhcp_lease_get_6rd(link->dhcp_lease, &ipv4masklen, &sixrd_prefixlen, &sixrd_prefix, NULL, NULL);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to get 6rd option: %m");
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sz = sizeof(uint8_t) * 2 + sizeof(struct in6_addr) + sizeof(struct in_addr);
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buf = newa(uint8_t, sz);
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p = buf;
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p = mempcpy(p, &ipv4masklen, sizeof(uint8_t));
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p = mempcpy(p, &ipv4address, sizeof(struct in_addr));
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p = mempcpy(p, &sixrd_prefixlen, sizeof(uint8_t));
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p = mempcpy(p, &sixrd_prefix, sizeof(struct in6_addr));
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result = siphash24(buf, sz, HASH_KEY.bytes);
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memcpy(ifname, "6rd-", STRLEN("6rd-"));
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ifname[STRLEN("6rd-") ] = urlsafe_base64char(result >> 54);
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ifname[STRLEN("6rd-") + 1] = urlsafe_base64char(result >> 48);
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ifname[STRLEN("6rd-") + 2] = urlsafe_base64char(result >> 42);
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ifname[STRLEN("6rd-") + 3] = urlsafe_base64char(result >> 36);
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ifname[STRLEN("6rd-") + 4] = urlsafe_base64char(result >> 30);
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ifname[STRLEN("6rd-") + 5] = urlsafe_base64char(result >> 24);
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ifname[STRLEN("6rd-") + 6] = urlsafe_base64char(result >> 18);
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ifname[STRLEN("6rd-") + 7] = urlsafe_base64char(result >> 12);
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ifname[STRLEN("6rd-") + 8] = urlsafe_base64char(result >> 6);
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ifname[STRLEN("6rd-") + 9] = urlsafe_base64char(result);
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ifname[STRLEN("6rd-") + 10] = '\0';
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assert_cc(STRLEN("6rd-") + 10 <= IFNAMSIZ);
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ifname_alloc = strdup(ifname);
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if (!ifname_alloc)
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return log_oom_debug();
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*ret = TAKE_PTR(ifname_alloc);
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return 0;
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}
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static int dhcp4_pd_create_6rd_tunnel_message(
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Link *link,
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sd_netlink_message *m,
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const struct in_addr *ipv4address,
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uint8_t ipv4masklen,
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const struct in6_addr *sixrd_prefix,
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uint8_t sixrd_prefixlen) {
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int r;
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r = sd_netlink_message_append_string(m, IFLA_IFNAME, link->dhcp4_6rd_tunnel_name);
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if (r < 0)
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return r;
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r = sd_netlink_message_open_container(m, IFLA_LINKINFO);
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if (r < 0)
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return r;
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r = sd_netlink_message_open_container_union(m, IFLA_INFO_DATA, "sit");
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, ipv4address);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, 64);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_6RD_PREFIX, sixrd_prefix);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_PREFIXLEN, sixrd_prefixlen);
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if (r < 0)
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return r;
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struct in_addr relay_prefix = *ipv4address;
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(void) in4_addr_mask(&relay_prefix, ipv4masklen);
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r = sd_netlink_message_append_u32(m, IFLA_IPTUN_6RD_RELAY_PREFIX, relay_prefix.s_addr);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, ipv4masklen);
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if (r < 0)
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return r;
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return r;
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r = sd_netlink_message_close_container(m);
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if (r < 0)
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return r;
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return 0;
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}
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int dhcp4_pd_create_6rd_tunnel(Link *link, link_netlink_message_handler_t callback) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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uint8_t ipv4masklen, sixrd_prefixlen;
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struct in_addr ipv4address;
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struct in6_addr sixrd_prefix;
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int r;
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assert(link);
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assert(link->ifindex > 0);
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assert(link->manager);
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assert(link->dhcp_lease);
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assert(link->dhcp4_6rd_tunnel_name);
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assert(callback);
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r = sd_dhcp_lease_get_address(link->dhcp_lease, &ipv4address);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to get DHCPv4 address: %m");
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r = sd_dhcp_lease_get_6rd(link->dhcp_lease, &ipv4masklen, &sixrd_prefixlen, &sixrd_prefix, NULL, NULL);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to get 6rd option: %m");
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r = sd_rtnl_message_new_link(link->manager->rtnl, &m, RTM_NEWLINK, 0);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to create netlink message: %m");
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r = dhcp4_pd_create_6rd_tunnel_message(link, m,
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&ipv4address, ipv4masklen,
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&sixrd_prefix, sixrd_prefixlen);
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if (r < 0)
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return log_link_debug_errno(link, r, "Failed to fill netlink message: %m");
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r = netlink_call_async(link->manager->rtnl, NULL, m, callback,
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link_netlink_destroy_callback, link);
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if (r < 0)
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return log_link_debug_errno(link, r, "Could not send netlink message: %m");
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link_ref(link);
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return 0;
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}
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static int tunnel_get_local_address(Tunnel *t, Link *link, union in_addr_union *ret) {
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assert(t);
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if (t->local_type < 0) {
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if (ret)
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*ret = t->local;
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return 0;
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}
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return link_get_local_address(link, t->local_type, t->family, NULL, ret);
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}
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static int netdev_ipip_sit_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
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union in_addr_union local;
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Tunnel *t;
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int r;
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assert(netdev);
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assert(m);
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if (netdev->kind == NETDEV_KIND_IPIP)
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t = IPIP(netdev);
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else
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t = SIT(netdev);
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assert(t);
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if (t->external) {
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r = sd_netlink_message_append_flag(m, IFLA_IPTUN_COLLECT_METADATA);
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if (r < 0)
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return r;
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/* If external mode is enabled, then the following settings should not be appended. */
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return 0;
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}
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if (link || t->assign_to_loopback) {
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r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
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if (r < 0)
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return r;
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}
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r = tunnel_get_local_address(t, link, &local);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
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r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &local.in);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
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if (r < 0)
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return r;
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if (t->fou_tunnel) {
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_TYPE, t->fou_encap_type);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_SPORT, htobe16(t->encap_src_port));
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_ENCAP_DPORT, htobe16(t->fou_destination_port));
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if (r < 0)
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return r;
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}
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if (netdev->kind == NETDEV_KIND_SIT) {
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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 r;
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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 r;
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}
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if (t->isatap >= 0) {
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uint16_t flags = 0;
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SET_FLAG(flags, SIT_ISATAP, t->isatap);
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r = sd_netlink_message_append_u16(m, IFLA_IPTUN_FLAGS, flags);
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if (r < 0)
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return r;
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}
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}
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return 0;
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}
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static int netdev_gre_erspan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
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union in_addr_union local;
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uint32_t ikey = 0;
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uint32_t okey = 0;
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uint16_t iflags = 0;
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uint16_t oflags = 0;
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Tunnel *t;
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int r;
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assert(netdev);
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assert(m);
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switch (netdev->kind) {
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case NETDEV_KIND_GRE:
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t = GRE(netdev);
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break;
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case NETDEV_KIND_ERSPAN:
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t = ERSPAN(netdev);
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break;
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case NETDEV_KIND_GRETAP:
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t = GRETAP(netdev);
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break;
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default:
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assert_not_reached();
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}
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assert(t);
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if (t->external) {
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r = sd_netlink_message_append_flag(m, IFLA_GRE_COLLECT_METADATA);
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if (r < 0)
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return r;
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/* If external mode is enabled, then the following settings should not be appended. */
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return 0;
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}
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if (link || t->assign_to_loopback) {
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r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
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if (r < 0)
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return r;
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}
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if (netdev->kind == NETDEV_KIND_ERSPAN) {
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r = sd_netlink_message_append_u32(m, IFLA_GRE_ERSPAN_INDEX, t->erspan_index);
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if (r < 0)
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return r;
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}
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r = tunnel_get_local_address(t, link, &local);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
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r = sd_netlink_message_append_in_addr(m, IFLA_GRE_LOCAL, &local.in);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_GRE_TOS, t->tos);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u8(m, IFLA_GRE_PMTUDISC, t->pmtudisc);
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if (r < 0)
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return r;
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if (t->key != 0) {
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ikey = okey = htobe32(t->key);
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iflags |= GRE_KEY;
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oflags |= GRE_KEY;
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}
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if (t->ikey != 0) {
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ikey = htobe32(t->ikey);
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iflags |= GRE_KEY;
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}
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if (t->okey != 0) {
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okey = htobe32(t->okey);
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oflags |= GRE_KEY;
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}
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if (t->gre_erspan_sequence > 0) {
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iflags |= GRE_SEQ;
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oflags |= GRE_SEQ;
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} else if (t->gre_erspan_sequence == 0) {
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iflags &= ~GRE_SEQ;
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oflags &= ~GRE_SEQ;
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}
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r = sd_netlink_message_append_u32(m, IFLA_GRE_IKEY, ikey);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u32(m, IFLA_GRE_OKEY, okey);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_GRE_IFLAGS, iflags);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_GRE_OFLAGS, oflags);
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if (r < 0)
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return r;
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if (t->fou_tunnel) {
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r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_TYPE, t->fou_encap_type);
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_SPORT, htobe16(t->encap_src_port));
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if (r < 0)
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return r;
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r = sd_netlink_message_append_u16(m, IFLA_GRE_ENCAP_DPORT, htobe16(t->fou_destination_port));
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if (r < 0)
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return r;
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}
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return 0;
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}
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static int netdev_ip6gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
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union in_addr_union local;
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uint32_t ikey = 0;
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uint32_t okey = 0;
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uint16_t iflags = 0;
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uint16_t oflags = 0;
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Tunnel *t;
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int r;
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assert(netdev);
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assert(m);
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if (netdev->kind == NETDEV_KIND_IP6GRE)
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t = IP6GRE(netdev);
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else
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t = IP6GRETAP(netdev);
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assert(t);
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if (t->external) {
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r = sd_netlink_message_append_flag(m, IFLA_GRE_COLLECT_METADATA);
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if (r < 0)
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return r;
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/* If external mode is enabled, then the following settings should not be appended. */
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return 0;
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}
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if (link || t->assign_to_loopback) {
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r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
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if (r < 0)
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return r;
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}
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r = tunnel_get_local_address(t, link, &local);
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if (r < 0)
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return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
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r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_LOCAL, &local.in6);
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if (r < 0)
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return r;
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|
|
r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_REMOTE, &t->remote.in6);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
|
|
r = sd_netlink_message_append_u32(m, IFLA_GRE_FLOWINFO, t->ipv6_flowlabel);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_GRE_FLAGS, t->flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (t->key != 0) {
|
|
ikey = okey = htobe32(t->key);
|
|
iflags |= GRE_KEY;
|
|
oflags |= GRE_KEY;
|
|
}
|
|
|
|
if (t->ikey != 0) {
|
|
ikey = htobe32(t->ikey);
|
|
iflags |= GRE_KEY;
|
|
}
|
|
|
|
if (t->okey != 0) {
|
|
okey = htobe32(t->okey);
|
|
oflags |= GRE_KEY;
|
|
}
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_GRE_IKEY, ikey);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_GRE_OKEY, okey);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u16(m, IFLA_GRE_IFLAGS, iflags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u16(m, IFLA_GRE_OFLAGS, oflags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
|
|
union in_addr_union local;
|
|
uint32_t ikey, okey;
|
|
Tunnel *t;
|
|
int r;
|
|
|
|
assert(netdev);
|
|
assert(m);
|
|
|
|
if (netdev->kind == NETDEV_KIND_VTI)
|
|
t = VTI(netdev);
|
|
else
|
|
t = VTI6(netdev);
|
|
|
|
assert(t);
|
|
|
|
if (link || t->assign_to_loopback) {
|
|
r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (t->key != 0)
|
|
ikey = okey = htobe32(t->key);
|
|
else {
|
|
ikey = htobe32(t->ikey);
|
|
okey = htobe32(t->okey);
|
|
}
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_VTI_IKEY, ikey);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_VTI_OKEY, okey);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = tunnel_get_local_address(t, link, &local);
|
|
if (r < 0)
|
|
return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
|
|
|
|
r = netlink_message_append_in_addr_union(m, IFLA_VTI_LOCAL, t->family, &local);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = netlink_message_append_in_addr_union(m, IFLA_VTI_REMOTE, t->family, &t->remote);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
|
|
union in_addr_union local;
|
|
uint8_t proto;
|
|
Tunnel *t;
|
|
int r;
|
|
|
|
assert(netdev);
|
|
assert(m);
|
|
|
|
t = IP6TNL(netdev);
|
|
|
|
assert(t);
|
|
|
|
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_netlink_message_append_u8(m, IFLA_IPTUN_PROTO, proto);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (t->external) {
|
|
r = sd_netlink_message_append_flag(m, IFLA_IPTUN_COLLECT_METADATA);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* If external mode is enabled, then the following settings should not be appended. */
|
|
return 0;
|
|
}
|
|
|
|
if (link || t->assign_to_loopback) {
|
|
r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link ? link->ifindex : LOOPBACK_IFINDEX);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = tunnel_get_local_address(t, link, &local);
|
|
if (r < 0)
|
|
return log_netdev_error_errno(netdev, r, "Could not find local address: %m");
|
|
|
|
r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_LOCAL, &local.in6);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in6);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) {
|
|
r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLOWINFO, t->ipv6_flowlabel);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (t->copy_dscp)
|
|
t->flags |= IP6_TNL_F_RCV_DSCP_COPY;
|
|
|
|
if (t->allow_localremote >= 0)
|
|
SET_FLAG(t->flags, IP6_TNL_F_ALLOW_LOCAL_REMOTE, t->allow_localremote);
|
|
|
|
r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLAGS, t->flags);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (t->encap_limit != 0) {
|
|
r = sd_netlink_message_append_u8(m, IFLA_IPTUN_ENCAP_LIMIT, t->encap_limit);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netdev_tunnel_is_ready_to_create(NetDev *netdev, Link *link) {
|
|
Tunnel *t;
|
|
|
|
assert(netdev);
|
|
assert(link);
|
|
|
|
t = TUNNEL(netdev);
|
|
|
|
assert(t);
|
|
|
|
return tunnel_get_local_address(t, link, NULL) >= 0;
|
|
}
|
|
|
|
static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
|
|
Tunnel *t;
|
|
|
|
assert(netdev);
|
|
assert(filename);
|
|
|
|
t = TUNNEL(netdev);
|
|
|
|
assert(t);
|
|
|
|
if (netdev->kind == NETDEV_KIND_IP6TNL &&
|
|
t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID)
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"ip6tnl without mode configured in %s. Ignoring", filename);
|
|
|
|
if (t->external) {
|
|
if (IN_SET(netdev->kind, NETDEV_KIND_VTI, NETDEV_KIND_VTI6))
|
|
log_netdev_debug(netdev, "vti/vti6 tunnel do not support external mode, ignoring.");
|
|
else {
|
|
/* tunnel with external mode does not require underlying interface. */
|
|
t->independent = true;
|
|
|
|
/* tunnel with external mode does not require any settings checked below. */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (IN_SET(netdev->kind, NETDEV_KIND_VTI, NETDEV_KIND_IPIP, NETDEV_KIND_SIT, NETDEV_KIND_GRE) &&
|
|
!IN_SET(t->family, AF_UNSPEC, AF_INET))
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"vti/ipip/sit/gre tunnel without a local/remote IPv4 address configured in %s. Ignoring", filename);
|
|
|
|
if (IN_SET(netdev->kind, NETDEV_KIND_GRETAP, NETDEV_KIND_ERSPAN) &&
|
|
(t->family != AF_INET || !in_addr_is_set(t->family, &t->remote)))
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"gretap/erspan tunnel without a remote IPv4 address configured in %s. Ignoring", filename);
|
|
|
|
if ((IN_SET(netdev->kind, NETDEV_KIND_VTI6, NETDEV_KIND_IP6TNL) && t->family != AF_INET6) ||
|
|
(netdev->kind == NETDEV_KIND_IP6GRE && !IN_SET(t->family, AF_UNSPEC, AF_INET6)))
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"vti6/ip6tnl/ip6gre tunnel without a local/remote IPv6 address configured in %s. Ignoring", filename);
|
|
|
|
if (netdev->kind == NETDEV_KIND_IP6GRETAP &&
|
|
(t->family != AF_INET6 || !in_addr_is_set(t->family, &t->remote)))
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"ip6gretap tunnel without a remote IPv6 address configured in %s. Ignoring", filename);
|
|
|
|
if (t->fou_tunnel && t->fou_destination_port <= 0)
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"FooOverUDP missing port configured in %s. Ignoring", filename);
|
|
|
|
if (netdev->kind == NETDEV_KIND_ERSPAN && (t->erspan_index >= (1 << 20) || t->erspan_index == 0))
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL), "Invalid erspan index %d. Ignoring", t->erspan_index);
|
|
|
|
/* netlink_message_append_in_addr_union() is used for vti/vti6. So, t->family cannot be AF_UNSPEC. */
|
|
if (netdev->kind == NETDEV_KIND_VTI)
|
|
t->family = AF_INET;
|
|
|
|
if (t->assign_to_loopback)
|
|
t->independent = true;
|
|
|
|
if (t->independent && t->local_type >= 0)
|
|
return log_netdev_error_errno(netdev, SYNTHETIC_ERRNO(EINVAL),
|
|
"The local address cannot be '%s' when Independent= or AssignToLoopback= is enabled, ignoring.",
|
|
strna(netdev_local_address_type_to_string(t->local_type)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_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) {
|
|
|
|
union in_addr_union buffer = IN_ADDR_NULL;
|
|
NetDevLocalAddressType type;
|
|
Tunnel *t = userdata;
|
|
int r, f;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(userdata);
|
|
|
|
if (isempty(rvalue) || streq(rvalue, "any")) {
|
|
/* Unset the previous assignment. */
|
|
t->local = IN_ADDR_NULL;
|
|
t->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
|
|
|
|
/* If the remote address is not specified, also clear the address family. */
|
|
if (!in_addr_is_set(t->family, &t->remote))
|
|
t->family = AF_UNSPEC;
|
|
return 0;
|
|
}
|
|
|
|
type = netdev_local_address_type_from_string(rvalue);
|
|
if (IN_SET(type, NETDEV_LOCAL_ADDRESS_IPV4LL, NETDEV_LOCAL_ADDRESS_DHCP4))
|
|
f = AF_INET;
|
|
else if (IN_SET(type, NETDEV_LOCAL_ADDRESS_IPV6LL, NETDEV_LOCAL_ADDRESS_DHCP6, NETDEV_LOCAL_ADDRESS_SLAAC))
|
|
f = AF_INET6;
|
|
else {
|
|
type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
|
|
r = in_addr_from_string_auto(rvalue, &f, &buffer);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Tunnel address \"%s\" invalid, ignoring assignment: %m", 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 = buffer;
|
|
t->local_type = type;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_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) {
|
|
|
|
union in_addr_union buffer;
|
|
Tunnel *t = userdata;
|
|
int r, f;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(userdata);
|
|
|
|
if (isempty(rvalue) || streq(rvalue, "any")) {
|
|
/* Unset the previous assignment. */
|
|
t->remote = IN_ADDR_NULL;
|
|
|
|
/* If the local address is not specified, also clear the address family. */
|
|
if (t->local_type == _NETDEV_LOCAL_ADDRESS_TYPE_INVALID &&
|
|
!in_addr_is_set(t->family, &t->local))
|
|
t->family = AF_UNSPEC;
|
|
return 0;
|
|
}
|
|
|
|
r = in_addr_from_string_auto(rvalue, &f, &buffer);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Tunnel address \"%s\" invalid, ignoring assignment: %m", 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 = buffer;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_tunnel_key(
|
|
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 *dest = ASSERT_PTR(data), k;
|
|
union in_addr_union buffer;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(rvalue);
|
|
|
|
r = in_addr_from_string(AF_INET, rvalue, &buffer);
|
|
if (r < 0) {
|
|
r = safe_atou32(rvalue, &k);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to parse tunnel key ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
} else
|
|
k = be32toh(buffer.in.s_addr);
|
|
|
|
*dest = k;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_ipv6_flowlabel(
|
|
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) {
|
|
|
|
Tunnel *t = ASSERT_PTR(userdata);
|
|
int k, r;
|
|
|
|
assert(filename);
|
|
assert(rvalue);
|
|
|
|
if (streq(rvalue, "inherit")) {
|
|
t->ipv6_flowlabel = IP6_FLOWINFO_FLOWLABEL;
|
|
t->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL;
|
|
return 0;
|
|
}
|
|
|
|
r = safe_atoi(rvalue, &k);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to parse tunnel IPv6 flowlabel, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (k > 0xFFFFF) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"Invalid tunnel IPv6 flowlabel, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
t->ipv6_flowlabel = htobe32(k) & IP6_FLOWINFO_FLOWLABEL;
|
|
t->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_encap_limit(
|
|
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) {
|
|
|
|
Tunnel *t = ASSERT_PTR(userdata);
|
|
int k, r;
|
|
|
|
assert(filename);
|
|
assert(rvalue);
|
|
|
|
if (streq(rvalue, "none")) {
|
|
t->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT;
|
|
t->encap_limit = 0;
|
|
return 0;
|
|
}
|
|
|
|
r = safe_atoi(rvalue, &k);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Failed to parse Tunnel Encapsulation Limit option, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (k > 255 || k < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"Invalid Tunnel Encapsulation value, ignoring assignment: %d", k);
|
|
return 0;
|
|
}
|
|
|
|
t->encap_limit = k;
|
|
t->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_6rd_prefix(
|
|
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) {
|
|
|
|
Tunnel *t = userdata;
|
|
union in_addr_union p;
|
|
uint8_t l;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
|
|
r = in_addr_prefix_from_string(rvalue, AF_INET6, &p, &l);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse 6rd prefix \"%s\", ignoring: %m", rvalue);
|
|
return 0;
|
|
}
|
|
if (l == 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0, "6rd prefix length of \"%s\" must be greater than zero, ignoring", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
t->sixrd_prefix = p.in6;
|
|
t->sixrd_prefixlen = l;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void netdev_tunnel_init(NetDev *netdev) {
|
|
Tunnel *t;
|
|
|
|
assert(netdev);
|
|
|
|
t = TUNNEL(netdev);
|
|
|
|
assert(t);
|
|
|
|
t->local_type = _NETDEV_LOCAL_ADDRESS_TYPE_INVALID;
|
|
t->pmtudisc = true;
|
|
t->fou_encap_type = NETDEV_FOO_OVER_UDP_ENCAP_DIRECT;
|
|
t->isatap = -1;
|
|
t->gre_erspan_sequence = -1;
|
|
t->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT;
|
|
t->ip6tnl_mode = _NETDEV_IP6_TNL_MODE_INVALID;
|
|
t->ipv6_flowlabel = _NETDEV_IPV6_FLOWLABEL_INVALID;
|
|
t->allow_localremote = -1;
|
|
|
|
if (IN_SET(netdev->kind, NETDEV_KIND_IP6GRE, NETDEV_KIND_IP6GRETAP, NETDEV_KIND_IP6TNL))
|
|
t->ttl = DEFAULT_IPV6_TTL;
|
|
}
|
|
|
|
const NetDevVTable ipip_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_ipip_sit_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_TUNNEL,
|
|
};
|
|
|
|
const NetDevVTable sit_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_ipip_sit_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_SIT,
|
|
};
|
|
|
|
const NetDevVTable vti_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_vti_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_TUNNEL,
|
|
};
|
|
|
|
const NetDevVTable vti6_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_vti_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_TUNNEL6,
|
|
};
|
|
|
|
const NetDevVTable gre_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_gre_erspan_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_IPGRE,
|
|
};
|
|
|
|
const NetDevVTable gretap_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_gre_erspan_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_ETHER,
|
|
.generate_mac = true,
|
|
};
|
|
|
|
const NetDevVTable ip6gre_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_ip6gre_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_IP6GRE,
|
|
};
|
|
|
|
const NetDevVTable ip6gretap_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_ip6gre_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_ETHER,
|
|
.generate_mac = true,
|
|
};
|
|
|
|
const NetDevVTable ip6tnl_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_ip6tnl_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_TUNNEL6,
|
|
};
|
|
|
|
const NetDevVTable erspan_vtable = {
|
|
.object_size = sizeof(Tunnel),
|
|
.init = netdev_tunnel_init,
|
|
.sections = NETDEV_COMMON_SECTIONS "Tunnel\0",
|
|
.fill_message_create = netdev_gre_erspan_fill_message_create,
|
|
.create_type = NETDEV_CREATE_STACKED,
|
|
.is_ready_to_create = netdev_tunnel_is_ready_to_create,
|
|
.config_verify = netdev_tunnel_verify,
|
|
.iftype = ARPHRD_ETHER,
|
|
.generate_mac = true,
|
|
};
|