1142 lines
37 KiB
C
1142 lines
37 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <net/if.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "firewall-util.h"
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#include "memory-util.h"
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#include "missing_network.h"
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#include "netlink-util.h"
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#include "networkd-address.h"
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#include "networkd-manager.h"
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#include "parse-util.h"
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#include "set.h"
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#include "socket-util.h"
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#include "string-util.h"
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#include "strv.h"
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#include "utf8.h"
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#define ADDRESSES_PER_LINK_MAX 2048U
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#define STATIC_ADDRESSES_PER_NETWORK_MAX 1024U
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int generate_ipv6_eui_64_address(Link *link, struct in6_addr *ret) {
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assert(link);
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assert(ret);
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/* see RFC4291 section 2.5.1 */
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ret->s6_addr[8] = link->mac.ether_addr_octet[0];
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ret->s6_addr[8] ^= 1 << 1;
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ret->s6_addr[9] = link->mac.ether_addr_octet[1];
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ret->s6_addr[10] = link->mac.ether_addr_octet[2];
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ret->s6_addr[11] = 0xff;
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ret->s6_addr[12] = 0xfe;
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ret->s6_addr[13] = link->mac.ether_addr_octet[3];
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ret->s6_addr[14] = link->mac.ether_addr_octet[4];
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ret->s6_addr[15] = link->mac.ether_addr_octet[5];
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return 0;
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}
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int address_new(Address **ret) {
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_cleanup_(address_freep) Address *address = NULL;
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address = new(Address, 1);
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if (!address)
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return -ENOMEM;
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*address = (Address) {
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.family = AF_UNSPEC,
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.scope = RT_SCOPE_UNIVERSE,
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.cinfo.ifa_prefered = CACHE_INFO_INFINITY_LIFE_TIME,
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.cinfo.ifa_valid = CACHE_INFO_INFINITY_LIFE_TIME,
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.duplicate_address_detection = ADDRESS_FAMILY_IPV6,
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.prefix_route = true,
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};
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*ret = TAKE_PTR(address);
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return 0;
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}
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static int address_new_static(Network *network, const char *filename, unsigned section_line, Address **ret) {
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_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
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_cleanup_(address_freep) Address *address = NULL;
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int r;
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assert(network);
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assert(ret);
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assert(!!filename == (section_line > 0));
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if (filename) {
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r = network_config_section_new(filename, section_line, &n);
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if (r < 0)
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return r;
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address = hashmap_get(network->addresses_by_section, n);
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if (address) {
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*ret = TAKE_PTR(address);
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return 0;
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}
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}
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if (network->n_static_addresses >= STATIC_ADDRESSES_PER_NETWORK_MAX)
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return -E2BIG;
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r = address_new(&address);
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if (r < 0)
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return r;
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address->network = network;
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LIST_APPEND(addresses, network->static_addresses, address);
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network->n_static_addresses++;
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if (filename) {
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address->section = TAKE_PTR(n);
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r = hashmap_ensure_allocated(&network->addresses_by_section, &network_config_hash_ops);
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if (r < 0)
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return r;
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r = hashmap_put(network->addresses_by_section, address->section, address);
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if (r < 0)
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return r;
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}
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*ret = TAKE_PTR(address);
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return 0;
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}
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void address_free(Address *address) {
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if (!address)
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return;
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if (address->network) {
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LIST_REMOVE(addresses, address->network->static_addresses, address);
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assert(address->network->n_static_addresses > 0);
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address->network->n_static_addresses--;
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if (address->section)
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hashmap_remove(address->network->addresses_by_section, address->section);
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}
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if (address->link && !address->acd) {
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set_remove(address->link->addresses, address);
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set_remove(address->link->addresses_foreign, address);
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if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
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memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
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}
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sd_ipv4acd_unref(address->acd);
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network_config_section_free(address->section);
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free(address->label);
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free(address);
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}
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static uint32_t address_prefix(const Address *a) {
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assert(a);
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/* make sure we don't try to shift by 32.
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* See ISO/IEC 9899:TC3 § 6.5.7.3. */
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if (a->prefixlen == 0)
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return 0;
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if (a->in_addr_peer.in.s_addr != 0)
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return be32toh(a->in_addr_peer.in.s_addr) >> (32 - a->prefixlen);
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else
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return be32toh(a->in_addr.in.s_addr) >> (32 - a->prefixlen);
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}
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static void address_hash_func(const Address *a, struct siphash *state) {
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assert(a);
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siphash24_compress(&a->family, sizeof(a->family), state);
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switch (a->family) {
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case AF_INET:
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siphash24_compress(&a->prefixlen, sizeof(a->prefixlen), state);
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/* peer prefix */
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uint32_t prefix = address_prefix(a);
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siphash24_compress(&prefix, sizeof(prefix), state);
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_fallthrough_;
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case AF_INET6:
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/* local address */
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siphash24_compress(&a->in_addr, FAMILY_ADDRESS_SIZE(a->family), state);
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break;
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default:
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/* treat any other address family as AF_UNSPEC */
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break;
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}
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}
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static int address_compare_func(const Address *a1, const Address *a2) {
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int r;
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r = CMP(a1->family, a2->family);
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if (r != 0)
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return r;
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switch (a1->family) {
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/* use the same notion of equality as the kernel does */
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case AF_INET:
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r = CMP(a1->prefixlen, a2->prefixlen);
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if (r != 0)
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return r;
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uint32_t prefix1 = address_prefix(a1);
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uint32_t prefix2 = address_prefix(a2);
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r = CMP(prefix1, prefix2);
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if (r != 0)
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return r;
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_fallthrough_;
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case AF_INET6:
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return memcmp(&a1->in_addr, &a2->in_addr, FAMILY_ADDRESS_SIZE(a1->family));
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default:
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/* treat any other address family as AF_UNSPEC */
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return 0;
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}
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}
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DEFINE_HASH_OPS(address_hash_ops, Address, address_hash_func, address_compare_func);
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bool address_equal(Address *a1, Address *a2) {
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if (a1 == a2)
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return true;
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if (!a1 || !a2)
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return false;
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return address_compare_func(a1, a2) == 0;
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}
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static int address_establish(Address *address, Link *link) {
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bool masq;
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int r;
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assert(address);
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assert(link);
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masq = link->network &&
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link->network->ip_masquerade &&
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address->family == AF_INET &&
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address->scope < RT_SCOPE_LINK;
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/* Add firewall entry if this is requested */
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if (address->ip_masquerade_done != masq) {
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union in_addr_union masked = address->in_addr;
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in_addr_mask(address->family, &masked, address->prefixlen);
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r = fw_add_masquerade(masq, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
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if (r < 0)
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return r;
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address->ip_masquerade_done = masq;
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}
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return 0;
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}
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static int address_add_internal(Link *link, Set **addresses,
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int family,
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const union in_addr_union *in_addr,
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unsigned char prefixlen,
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Address **ret) {
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_cleanup_(address_freep) Address *address = NULL;
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int r;
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assert(link);
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assert(addresses);
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assert(in_addr);
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r = address_new(&address);
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if (r < 0)
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return r;
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address->family = family;
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address->in_addr = *in_addr;
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address->prefixlen = prefixlen;
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/* Consider address tentative until we get the real flags from the kernel */
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address->flags = IFA_F_TENTATIVE;
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r = set_ensure_put(addresses, &address_hash_ops, address);
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if (r < 0)
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return r;
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if (r == 0)
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return -EEXIST;
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address->link = link;
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if (ret)
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*ret = address;
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TAKE_PTR(address);
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return 0;
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}
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int address_add_foreign(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
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return address_add_internal(link, &link->addresses_foreign, family, in_addr, prefixlen, ret);
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}
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int address_add(Link *link, int family, const union in_addr_union *in_addr, unsigned char prefixlen, Address **ret) {
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Address *address;
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int r;
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r = address_get(link, family, in_addr, prefixlen, &address);
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if (r == -ENOENT) {
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/* Address does not exist, create a new one */
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r = address_add_internal(link, &link->addresses, family, in_addr, prefixlen, &address);
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if (r < 0)
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return r;
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} else if (r == 0) {
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/* Take over a foreign address */
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r = set_ensure_put(&link->addresses, &address_hash_ops, address);
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if (r < 0)
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return r;
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set_remove(link->addresses_foreign, address);
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} else if (r == 1) {
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/* Already exists, do nothing */
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;
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} else
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return r;
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if (ret)
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*ret = address;
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return 0;
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}
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static int address_release(Address *address) {
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int r;
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assert(address);
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assert(address->link);
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/* Remove masquerading firewall entry if it was added */
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if (address->ip_masquerade_done) {
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union in_addr_union masked = address->in_addr;
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in_addr_mask(address->family, &masked, address->prefixlen);
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r = fw_add_masquerade(false, AF_INET, 0, &masked, address->prefixlen, NULL, NULL, 0);
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if (r < 0)
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return r;
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address->ip_masquerade_done = false;
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}
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return 0;
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}
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int address_update(
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Address *address,
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unsigned char flags,
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unsigned char scope,
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const struct ifa_cacheinfo *cinfo) {
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bool ready;
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int r;
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assert(address);
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assert(cinfo);
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assert_return(address->link, 1);
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if (IN_SET(address->link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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ready = address_is_ready(address);
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address->flags = flags;
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address->scope = scope;
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address->cinfo = *cinfo;
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link_update_operstate(address->link, true);
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link_check_ready(address->link);
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if (!ready &&
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address_is_ready(address) &&
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address->family == AF_INET6 &&
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in_addr_is_link_local(AF_INET6, &address->in_addr) > 0 &&
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in_addr_is_null(AF_INET6, (const union in_addr_union*) &address->link->ipv6ll_address) > 0) {
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r = link_ipv6ll_gained(address->link, &address->in_addr.in6);
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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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int address_drop(Address *address) {
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Link *link;
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bool ready;
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int r;
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assert(address);
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ready = address_is_ready(address);
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link = address->link;
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r = address_release(address);
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if (r < 0)
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log_link_warning_errno(link, r, "Failed to disable IP masquerading, ignoring: %m");
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address_free(address);
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link_update_operstate(link, true);
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if (link && !ready)
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link_check_ready(link);
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return 0;
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}
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int address_get(Link *link,
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int family,
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const union in_addr_union *in_addr,
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unsigned char prefixlen,
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Address **ret) {
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Address address, *existing;
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assert(link);
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assert(in_addr);
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address = (Address) {
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.family = family,
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.in_addr = *in_addr,
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.prefixlen = prefixlen,
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};
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existing = set_get(link->addresses, &address);
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if (existing) {
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if (ret)
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*ret = existing;
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return 1;
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}
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existing = set_get(link->addresses_foreign, &address);
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if (existing) {
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if (ret)
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*ret = existing;
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return 0;
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}
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return -ENOENT;
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}
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static int address_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
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int r;
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assert(m);
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assert(link);
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assert(link->ifname);
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return 1;
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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EADDRNOTAVAIL)
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log_link_message_warning_errno(link, m, r, "Could not drop address");
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return 1;
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}
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int address_remove(
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Address *address,
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Link *link,
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link_netlink_message_handler_t callback) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
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int r;
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assert(address);
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assert(IN_SET(address->family, AF_INET, AF_INET6));
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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->manager->rtnl);
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *b = NULL;
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(void) in_addr_to_string(address->family, &address->in_addr, &b);
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log_link_debug(link, "Removing address %s", strna(b));
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}
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r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_DELADDR,
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link->ifindex, address->family);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not allocate RTM_DELADDR message: %m");
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r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not set prefixlen: %m");
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r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m");
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r = netlink_call_async(link->manager->rtnl, NULL, req,
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callback ?: address_remove_handler,
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link_netlink_destroy_callback, link);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not send rtnetlink 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 address_acquire(Link *link, Address *original, Address **ret) {
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union in_addr_union in_addr = IN_ADDR_NULL;
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struct in_addr broadcast = {};
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_cleanup_(address_freep) Address *na = NULL;
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int r;
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assert(link);
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assert(original);
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assert(ret);
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/* Something useful was configured? just use it */
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r = in_addr_is_null(original->family, &original->in_addr);
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if (r <= 0)
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return r;
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/* The address is configured to be 0.0.0.0 or [::] by the user?
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* Then let's acquire something more useful from the pool. */
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r = manager_address_pool_acquire(link->manager, original->family, original->prefixlen, &in_addr);
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if (r < 0)
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return r;
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if (r == 0)
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return -EBUSY;
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if (original->family == AF_INET) {
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/* Pick first address in range for ourselves ... */
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in_addr.in.s_addr = in_addr.in.s_addr | htobe32(1);
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/* .. and use last as broadcast address */
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if (original->prefixlen > 30)
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broadcast.s_addr = 0;
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else
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broadcast.s_addr = in_addr.in.s_addr | htobe32(0xFFFFFFFFUL >> original->prefixlen);
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} else if (original->family == AF_INET6)
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in_addr.in6.s6_addr[15] |= 1;
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r = address_new(&na);
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if (r < 0)
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return r;
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na->family = original->family;
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na->prefixlen = original->prefixlen;
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na->scope = original->scope;
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na->cinfo = original->cinfo;
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if (original->label) {
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na->label = strdup(original->label);
|
|
if (!na->label)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
na->broadcast = broadcast;
|
|
na->in_addr = in_addr;
|
|
|
|
LIST_PREPEND(addresses, link->pool_addresses, na);
|
|
|
|
*ret = TAKE_PTR(na);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int address_configure(
|
|
Address *address,
|
|
Link *link,
|
|
link_netlink_message_handler_t callback,
|
|
bool update) {
|
|
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
|
|
int r;
|
|
|
|
assert(address);
|
|
assert(IN_SET(address->family, AF_INET, AF_INET6));
|
|
assert(link);
|
|
assert(link->ifindex > 0);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
assert(callback);
|
|
|
|
/* If this is a new address, then refuse adding more than the limit */
|
|
if (address_get(link, address->family, &address->in_addr, address->prefixlen, NULL) <= 0 &&
|
|
set_size(link->addresses) >= ADDRESSES_PER_LINK_MAX)
|
|
return log_link_error_errno(link, SYNTHETIC_ERRNO(E2BIG),
|
|
"Too many addresses are configured, refusing: %m");
|
|
|
|
r = address_acquire(link, address, &address);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Failed to acquire an address from pool: %m");
|
|
|
|
if (update)
|
|
r = sd_rtnl_message_new_addr_update(link->manager->rtnl, &req,
|
|
link->ifindex, address->family);
|
|
else
|
|
r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_NEWADDR,
|
|
link->ifindex, address->family);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m");
|
|
|
|
r = sd_rtnl_message_addr_set_prefixlen(req, address->prefixlen);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set prefixlen: %m");
|
|
|
|
address->flags |= IFA_F_PERMANENT;
|
|
|
|
if (address->home_address)
|
|
address->flags |= IFA_F_HOMEADDRESS;
|
|
|
|
if (!FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV6))
|
|
address->flags |= IFA_F_NODAD;
|
|
|
|
if (address->manage_temporary_address)
|
|
address->flags |= IFA_F_MANAGETEMPADDR;
|
|
|
|
if (!address->prefix_route)
|
|
address->flags |= IFA_F_NOPREFIXROUTE;
|
|
|
|
if (address->autojoin)
|
|
address->flags |= IFA_F_MCAUTOJOIN;
|
|
|
|
r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff));
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set flags: %m");
|
|
|
|
if (address->flags & ~0xff) {
|
|
r = sd_netlink_message_append_u32(req, IFA_FLAGS, address->flags);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set extended flags: %m");
|
|
}
|
|
|
|
r = sd_rtnl_message_addr_set_scope(req, address->scope);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not set scope: %m");
|
|
|
|
r = netlink_message_append_in_addr_union(req, IFA_LOCAL, address->family, &address->in_addr);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFA_LOCAL attribute: %m");
|
|
|
|
if (in_addr_is_null(address->family, &address->in_addr_peer) == 0) {
|
|
r = netlink_message_append_in_addr_union(req, IFA_ADDRESS, address->family, &address->in_addr_peer);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m");
|
|
} else if (address->family == AF_INET && address->prefixlen <= 30) {
|
|
r = sd_netlink_message_append_in_addr(req, IFA_BROADCAST, &address->broadcast);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFA_BROADCAST attribute: %m");
|
|
}
|
|
|
|
if (address->label) {
|
|
r = sd_netlink_message_append_string(req, IFA_LABEL, address->label);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFA_LABEL attribute: %m");
|
|
}
|
|
|
|
r = sd_netlink_message_append_cache_info(req, IFA_CACHEINFO, &address->cinfo);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not append IFA_CACHEINFO attribute: %m");
|
|
|
|
r = address_establish(address, link);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Could not enable IP masquerading, ignoring: %m");
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, req, callback, link_netlink_destroy_callback, link);
|
|
if (r < 0) {
|
|
address_release(address);
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
}
|
|
|
|
link_ref(link);
|
|
|
|
if (address->family == AF_INET6 && !in_addr_is_null(address->family, &address->in_addr_peer))
|
|
r = address_add(link, address->family, &address->in_addr_peer, address->prefixlen, NULL);
|
|
else
|
|
r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
|
|
if (r < 0) {
|
|
address_release(address);
|
|
return log_link_error_errno(link, r, "Could not add address: %m");
|
|
}
|
|
|
|
if (address->acd) {
|
|
assert(address->family == AF_INET);
|
|
if (DEBUG_LOGGING) {
|
|
_cleanup_free_ char *pretty = NULL;
|
|
|
|
(void) in_addr_to_string(address->family, &address->in_addr, &pretty);
|
|
log_link_debug(link, "Starting IPv4ACD client. Probing address %s", strna(pretty));
|
|
}
|
|
|
|
r = sd_ipv4acd_start(address->acd, true);
|
|
if (r < 0)
|
|
log_link_warning_errno(link, r, "Failed to start IPv4ACD client, ignoring: %m");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void static_address_on_acd(sd_ipv4acd *acd, int event, void *userdata) {
|
|
_cleanup_free_ char *pretty = NULL;
|
|
Address *address;
|
|
Link *link;
|
|
int r;
|
|
|
|
assert(acd);
|
|
assert(userdata);
|
|
|
|
address = (Address *) userdata;
|
|
link = address->link;
|
|
|
|
(void) in_addr_to_string(address->family, &address->in_addr, &pretty);
|
|
switch (event) {
|
|
case SD_IPV4ACD_EVENT_STOP:
|
|
log_link_debug(link, "Stopping ACD client...");
|
|
return;
|
|
|
|
case SD_IPV4ACD_EVENT_BIND:
|
|
log_link_debug(link, "Successfully claimed address %s", strna(pretty));
|
|
link_check_ready(link);
|
|
break;
|
|
|
|
case SD_IPV4ACD_EVENT_CONFLICT:
|
|
log_link_warning(link, "DAD conflict. Dropping address %s", strna(pretty));
|
|
r = address_remove(address, link, NULL);
|
|
if (r < 0)
|
|
log_link_error_errno(link, r, "Failed to drop DAD conflicted address %s", strna(pretty));;
|
|
|
|
link_check_ready(link);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Invalid IPv4ACD event.");
|
|
}
|
|
|
|
sd_ipv4acd_stop(acd);
|
|
|
|
return;
|
|
}
|
|
|
|
int configure_ipv4_duplicate_address_detection(Link *link, Address *address) {
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(address);
|
|
assert(address->family == AF_INET);
|
|
assert(!address->link && address->network);
|
|
|
|
address->link = link;
|
|
|
|
r = sd_ipv4acd_new(&address->acd);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_ipv4acd_attach_event(address->acd, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_ipv4acd_set_ifindex(address->acd, link->ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_ipv4acd_set_mac(address->acd, &link->mac);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_ipv4acd_set_address(address->acd, &address->in_addr.in);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_ipv4acd_set_callback(address->acd, static_address_on_acd, address);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_broadcast(
|
|
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) {
|
|
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (n->family == AF_INET6) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0,
|
|
"Broadcast is not valid for IPv6 addresses, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
r = in_addr_from_string(AF_INET, rvalue, (union in_addr_union*) &n->broadcast);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Broadcast is invalid, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->family = AF_INET;
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_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) {
|
|
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
union in_addr_union buffer;
|
|
unsigned char prefixlen;
|
|
int r, f;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (streq(section, "Network")) {
|
|
/* we are not in an Address section, so treat
|
|
* this as the special '0' section */
|
|
r = address_new_static(network, NULL, 0, &n);
|
|
} else
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* Address=address/prefixlen */
|
|
r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_REFUSE, &f, &buffer, &prefixlen);
|
|
if (r == -ENOANO) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"An address '%s' is specified without prefix length. "
|
|
"The behavior of parsing addresses without prefix length will be changed in the future release. "
|
|
"Please specify prefix length explicitly.", rvalue);
|
|
|
|
r = in_addr_prefix_from_string_auto_internal(rvalue, PREFIXLEN_LEGACY, &f, &buffer, &prefixlen);
|
|
}
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Invalid address '%s', ignoring assignment: %m", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (n->family != AF_UNSPEC && f != n->family) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0, "Address is incompatible, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (in_addr_is_null(f, &buffer)) {
|
|
/* Will use address from address pool. Note that for ipv6 case, prefix of the address
|
|
* pool is 8, but 40 bit is used by the global ID and 16 bit by the subnet ID. So,
|
|
* let's limit the prefix length to 64 or larger. See RFC4193. */
|
|
if ((f == AF_INET && prefixlen < 8) ||
|
|
(f == AF_INET6 && prefixlen < 64)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0,
|
|
"Null address with invalid prefixlen='%u', ignoring assignment: %s",
|
|
prefixlen, rvalue);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
n->family = f;
|
|
n->prefixlen = prefixlen;
|
|
|
|
if (streq(lvalue, "Address"))
|
|
n->in_addr = buffer;
|
|
else
|
|
n->in_addr_peer = buffer;
|
|
|
|
if (n->family == AF_INET && n->broadcast.s_addr == 0 && n->prefixlen <= 30)
|
|
n->broadcast.s_addr = n->in_addr.in.s_addr | htobe32(0xfffffffflu >> n->prefixlen);
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_label(
|
|
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_(address_free_or_set_invalidp) Address *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!address_label_valid(rvalue)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0,
|
|
"Interface label is too long or invalid, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
r = free_and_strdup(&n->label, rvalue);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
n = NULL;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_lifetime(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) {
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
uint32_t k;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
/* We accept only "forever", "infinity", empty, or "0". */
|
|
if (STR_IN_SET(rvalue, "forever", "infinity", ""))
|
|
k = CACHE_INFO_INFINITY_LIFE_TIME;
|
|
else if (streq(rvalue, "0"))
|
|
k = 0;
|
|
else {
|
|
log_syntax(unit, LOG_ERR, filename, line, 0,
|
|
"Invalid PreferredLifetime= value, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->cinfo.ifa_prefered = k;
|
|
TAKE_PTR(n);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_address_flags(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) {
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = parse_boolean(rvalue);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to parse %s=, ignoring: %s", lvalue, rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (streq(lvalue, "HomeAddress"))
|
|
n->home_address = r;
|
|
else if (streq(lvalue, "ManageTemporaryAddress"))
|
|
n->manage_temporary_address = r;
|
|
else if (streq(lvalue, "PrefixRoute"))
|
|
n->prefix_route = !r;
|
|
else if (streq(lvalue, "AddPrefixRoute"))
|
|
n->prefix_route = r;
|
|
else if (streq(lvalue, "AutoJoin"))
|
|
n->autojoin = r;
|
|
else
|
|
assert_not_reached("Invalid address flag type.");
|
|
|
|
n = NULL;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_address_scope(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) {
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (streq(rvalue, "host"))
|
|
n->scope = RT_SCOPE_HOST;
|
|
else if (streq(rvalue, "link"))
|
|
n->scope = RT_SCOPE_LINK;
|
|
else if (streq(rvalue, "global"))
|
|
n->scope = RT_SCOPE_UNIVERSE;
|
|
else {
|
|
r = safe_atou8(rvalue , &n->scope);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Could not parse address scope \"%s\", ignoring assignment: %m", rvalue);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
n->scope_set = true;
|
|
n = NULL;
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_duplicate_address_detection(
|
|
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) {
|
|
Network *network = userdata;
|
|
_cleanup_(address_free_or_set_invalidp) Address *n = NULL;
|
|
AddressFamily a;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = address_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = parse_boolean(rvalue);
|
|
if (r >= 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"For historical reasons, %s=%s means %s=%s. "
|
|
"Please use 'both', 'ipv4', 'ipv6' or 'none' instead.",
|
|
lvalue, rvalue, lvalue, r ? "none" : "both");
|
|
n->duplicate_address_detection = r ? ADDRESS_FAMILY_NO : ADDRESS_FAMILY_YES;
|
|
n = NULL;
|
|
return 0;
|
|
}
|
|
|
|
a = duplicate_address_detection_address_family_from_string(rvalue);
|
|
if (a < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EINVAL),
|
|
"Failed to parse %s=, ignoring: %s", lvalue, rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->duplicate_address_detection = a;
|
|
n = NULL;
|
|
return 0;
|
|
}
|
|
|
|
bool address_is_ready(const Address *a) {
|
|
assert(a);
|
|
|
|
return !(a->flags & IFA_F_TENTATIVE);
|
|
}
|
|
|
|
int address_section_verify(Address *address) {
|
|
if (section_is_invalid(address->section))
|
|
return -EINVAL;
|
|
|
|
if (address->family == AF_UNSPEC) {
|
|
assert(address->section);
|
|
|
|
return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"%s: Address section without Address= field configured. "
|
|
"Ignoring [Address] section from line %u.",
|
|
address->section->filename, address->section->line);
|
|
}
|
|
|
|
if (!address->scope_set && in_addr_is_localhost(address->family, &address->in_addr) > 0)
|
|
address->scope = RT_SCOPE_HOST;
|
|
|
|
return 0;
|
|
}
|