1069 lines
35 KiB
C
1069 lines
35 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2017 Susant Sahani
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <net/if.h>
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#include <linux/fib_rules.h>
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#include "alloc-util.h"
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#include "conf-parser.h"
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#include "fileio.h"
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#include "networkd-routing-policy-rule.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 "socket-util.h"
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#include "string-util.h"
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int routing_policy_rule_new(RoutingPolicyRule **ret) {
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RoutingPolicyRule *rule;
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rule = new0(RoutingPolicyRule, 1);
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if (!rule)
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return -ENOMEM;
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rule->family = AF_INET;
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rule->table = RT_TABLE_MAIN;
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*ret = rule;
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return 0;
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}
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void routing_policy_rule_free(RoutingPolicyRule *rule) {
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if (!rule)
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return;
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if (rule->network) {
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LIST_REMOVE(rules, rule->network->rules, rule);
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assert(rule->network->n_rules > 0);
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rule->network->n_rules--;
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if (rule->section) {
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hashmap_remove(rule->network->rules_by_section, rule->section);
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network_config_section_free(rule->section);
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}
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}
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if (rule->manager) {
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set_remove(rule->manager->rules, rule);
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set_remove(rule->manager->rules_foreign, rule);
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}
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free(rule->iif);
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free(rule->oif);
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free(rule);
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}
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static void routing_policy_rule_hash_func(const void *b, struct siphash *state) {
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const RoutingPolicyRule *rule = b;
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assert(rule);
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siphash24_compress(&rule->family, sizeof(rule->family), state);
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switch (rule->family) {
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case AF_INET:
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case AF_INET6:
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siphash24_compress(&rule->from, FAMILY_ADDRESS_SIZE(rule->family), state);
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siphash24_compress(&rule->from_prefixlen, sizeof(rule->from_prefixlen), state);
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siphash24_compress(&rule->to, FAMILY_ADDRESS_SIZE(rule->family), state);
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siphash24_compress(&rule->to_prefixlen, sizeof(rule->to_prefixlen), state);
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siphash24_compress(&rule->tos, sizeof(rule->tos), state);
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siphash24_compress(&rule->fwmark, sizeof(rule->fwmark), state);
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siphash24_compress(&rule->table, sizeof(rule->table), state);
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if (rule->iif)
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siphash24_compress(&rule->iif, strlen(rule->iif), state);
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if (rule->oif)
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siphash24_compress(&rule->oif, strlen(rule->oif), 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 routing_policy_rule_compare_func(const void *_a, const void *_b) {
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const RoutingPolicyRule *a = _a, *b = _b;
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int r;
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if (a->family < b->family)
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return -1;
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if (a->family > b->family)
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return 1;
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switch (a->family) {
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case AF_INET:
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case AF_INET6:
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if (a->from_prefixlen < b->from_prefixlen)
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return -1;
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if (a->from_prefixlen > b->from_prefixlen)
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return 1;
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if (a->to_prefixlen < b->to_prefixlen)
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return -1;
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if (a->to_prefixlen > b->to_prefixlen)
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return 1;
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if (a->tos < b->tos)
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return -1;
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if (a->tos > b->tos)
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return 1;
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if (a->fwmask < b->fwmark)
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return -1;
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if (a->fwmask > b->fwmark)
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return 1;
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if (a->table < b->table)
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return -1;
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if (a->table > b->table)
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return 1;
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r = strcmp_ptr(a->iif, b->iif);
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if (!r)
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return r;
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r = strcmp_ptr(a->oif, b->oif);
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if (!r)
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return r;
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r = memcmp(&a->from, &b->from, FAMILY_ADDRESS_SIZE(a->family));
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if (r != 0)
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return r;
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return memcmp(&a->to, &b->to, FAMILY_ADDRESS_SIZE(a->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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const struct hash_ops routing_policy_rule_hash_ops = {
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.hash = routing_policy_rule_hash_func,
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.compare = routing_policy_rule_compare_func
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};
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int routing_policy_rule_get(Manager *m,
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int family,
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const union in_addr_union *from,
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uint8_t from_prefixlen,
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const union in_addr_union *to,
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uint8_t to_prefixlen,
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uint8_t tos,
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uint32_t fwmark,
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uint32_t table,
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char *iif,
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char *oif,
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RoutingPolicyRule **ret) {
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RoutingPolicyRule rule, *existing;
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assert_return(m, -1);
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rule = (RoutingPolicyRule) {
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.family = family,
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.from = *from,
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.from_prefixlen = from_prefixlen,
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.to = *to,
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.to_prefixlen = to_prefixlen,
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.tos = tos,
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.fwmark = fwmark,
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.table = table,
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.iif = iif,
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.oif = oif
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};
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if (m->rules) {
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existing = set_get(m->rules, &rule);
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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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}
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if (m->rules_foreign) {
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existing = set_get(m->rules_foreign, &rule);
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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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}
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return -ENOENT;
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}
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int routing_policy_rule_make_local(Manager *m, RoutingPolicyRule *rule) {
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int r;
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assert(m);
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if (set_contains(m->rules_foreign, rule)) {
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set_remove(m->rules_foreign, rule);
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r = set_ensure_allocated(&m->rules, &routing_policy_rule_hash_ops);
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if (r < 0)
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return r;
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return set_put(m->rules, rule);
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}
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return -ENOENT;
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}
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static int routing_policy_rule_add_internal(Manager *m,
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Set **rules,
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int family,
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const union in_addr_union *from,
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uint8_t from_prefixlen,
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const union in_addr_union *to,
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uint8_t to_prefixlen,
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uint8_t tos,
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uint32_t fwmark,
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uint32_t table,
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char *iif,
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char *oif,
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RoutingPolicyRule **ret) {
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_cleanup_routing_policy_rule_free_ RoutingPolicyRule *rule = NULL;
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int r;
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assert_return(rules, -EINVAL);
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r = routing_policy_rule_new(&rule);
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if (r < 0)
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return r;
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rule->manager = m;
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rule->family = family;
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rule->from = *from;
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rule->from_prefixlen = from_prefixlen;
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rule->to = *to;
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rule->to_prefixlen = to_prefixlen;
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rule->tos = tos;
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rule->fwmark = fwmark;
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rule->table = table;
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rule->iif = iif;
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rule->oif = oif;
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r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
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if (r < 0)
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return r;
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r = set_put(*rules, rule);
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if (r < 0)
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return r;
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if (ret)
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*ret = rule;
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rule = NULL;
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return 0;
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}
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int routing_policy_rule_add(Manager *m,
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int family,
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const union in_addr_union *from,
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uint8_t from_prefixlen,
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const union in_addr_union *to,
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uint8_t to_prefixlen,
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uint8_t tos,
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uint32_t fwmark,
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uint32_t table,
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char *iif,
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char *oif,
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RoutingPolicyRule **ret) {
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return routing_policy_rule_add_internal(m, &m->rules, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, ret);
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}
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int routing_policy_rule_add_foreign(Manager *m,
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int family,
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const union in_addr_union *from,
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uint8_t from_prefixlen,
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const union in_addr_union *to,
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uint8_t to_prefixlen,
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uint8_t tos,
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uint32_t fwmark,
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uint32_t table,
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char *iif,
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char *oif,
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RoutingPolicyRule **ret) {
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return routing_policy_rule_add_internal(m, &m->rules_foreign, family, from, from_prefixlen, to, to_prefixlen, tos, fwmark, table, iif, oif, ret);
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}
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static int routing_policy_rule_remove_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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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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link->routing_policy_rule_remove_messages--;
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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)
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log_link_warning_errno(link, r, "Could not drop routing policy rule: %m");
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return 1;
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}
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int routing_policy_rule_remove(RoutingPolicyRule *routing_policy_rule, Link *link, sd_netlink_message_handler_t callback) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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int r;
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assert(routing_policy_rule);
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assert(link);
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assert(link->manager);
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assert(link->manager->rtnl);
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assert(link->ifindex > 0);
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assert(IN_SET(routing_policy_rule->family, AF_INET, AF_INET6));
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r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_DELRULE, routing_policy_rule->family);
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if (r < 0)
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return log_error_errno(r, "Could not allocate RTM_DELRULE message: %m");
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if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->from)) {
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if (routing_policy_rule->family == AF_INET)
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r = sd_netlink_message_append_in_addr(m, FRA_SRC, &routing_policy_rule->from.in);
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else
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r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &routing_policy_rule->from.in6);
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if (r < 0)
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return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
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r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, routing_policy_rule->from_prefixlen);
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if (r < 0)
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return log_error_errno(r, "Could not set source prefix length: %m");
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}
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if (!in_addr_is_null(routing_policy_rule->family, &routing_policy_rule->to)) {
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if (routing_policy_rule->family == AF_INET)
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r = sd_netlink_message_append_in_addr(m, FRA_DST, &routing_policy_rule->to.in);
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else
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r = sd_netlink_message_append_in6_addr(m, FRA_DST, &routing_policy_rule->to.in6);
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if (r < 0)
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return log_error_errno(r, "Could not append FRA_DST attribute: %m");
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r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, routing_policy_rule->to_prefixlen);
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if (r < 0)
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return log_error_errno(r, "Could not set destination prefix length: %m");
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}
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r = sd_netlink_call_async(link->manager->rtnl, m, callback, link, 0, NULL);
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if (r < 0)
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return log_error_errno(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 routing_policy_rule_new_static(Network *network, const char *filename, unsigned section_line, RoutingPolicyRule **ret) {
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_cleanup_routing_policy_rule_free_ RoutingPolicyRule *rule = NULL;
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_cleanup_network_config_section_free_ NetworkConfigSection *n = 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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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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rule = hashmap_get(network->rules_by_section, n);
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if (rule) {
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*ret = rule;
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rule = NULL;
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return 0;
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}
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r = routing_policy_rule_new(&rule);
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if (r < 0)
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return r;
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rule->section = n;
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rule->network = network;
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n = NULL;
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r = hashmap_put(network->rules_by_section, rule->section, rule);
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if (r < 0)
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return r;
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LIST_APPEND(rules, network->rules, rule);
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network->n_rules++;
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*ret = rule;
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rule = NULL;
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return 0;
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}
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int link_routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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assert(rtnl);
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assert(m);
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assert(link);
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assert(link->ifname);
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assert(link->routing_policy_rule_messages > 0);
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link->routing_policy_rule_messages--;
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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 != -EEXIST)
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log_link_warning_errno(link, r, "Could not add routing policy rule: %m");
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if (link->routing_policy_rule_messages == 0) {
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log_link_debug(link, "Routing policy rule configured");
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link->routing_policy_rules_configured = true;
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link_check_ready(link);
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}
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return 1;
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}
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int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link, sd_netlink_message_handler_t callback, bool update) {
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_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
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int r;
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assert(rule);
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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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r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_NEWRULE, rule->family);
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if (r < 0)
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return log_error_errno(r, "Could not allocate RTM_NEWRULE message: %m");
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if (!in_addr_is_null(rule->family, &rule->from)) {
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if (rule->family == AF_INET)
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r = sd_netlink_message_append_in_addr(m, FRA_SRC, &rule->from.in);
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else
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r = sd_netlink_message_append_in6_addr(m, FRA_SRC, &rule->from.in6);
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if (r < 0)
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return log_error_errno(r, "Could not append FRA_SRC attribute: %m");
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r = sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(m, rule->from_prefixlen);
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if (r < 0)
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return log_error_errno(r, "Could not set source prefix length: %m");
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}
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if (!in_addr_is_null(rule->family, &rule->to)) {
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if (rule->family == AF_INET)
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r = sd_netlink_message_append_in_addr(m, FRA_DST, &rule->to.in);
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else
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r = sd_netlink_message_append_in6_addr(m, FRA_DST, &rule->to.in6);
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if (r < 0)
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return log_error_errno(r, "Could not append FRA_DST attribute: %m");
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r = sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(m, rule->to_prefixlen);
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if (r < 0)
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return log_error_errno(r, "Could not set destination prefix length: %m");
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}
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r = sd_netlink_message_append_u32(m, FRA_PRIORITY, rule->priority);
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if (r < 0)
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return log_error_errno(r, "Could not append FRA_PRIORITY attribute: %m");
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if (rule->tos > 0) {
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r = sd_rtnl_message_routing_policy_rule_set_tos(m, rule->tos);
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if (r < 0)
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return log_error_errno(r, "Could not set ip rule tos: %m");
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}
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if (rule->table < 256) {
|
|
r = sd_rtnl_message_routing_policy_rule_set_table(m, rule->table);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not set ip rule table: %m");
|
|
} else {
|
|
r = sd_rtnl_message_routing_policy_rule_set_table(m, RT_TABLE_UNSPEC);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not set ip rule table: %m");
|
|
|
|
r = sd_netlink_message_append_u32(m, FRA_TABLE, rule->table);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not append FRA_TABLE attribute: %m");
|
|
}
|
|
|
|
if (rule->fwmark > 0) {
|
|
r = sd_netlink_message_append_u32(m, FRA_FWMARK, rule->fwmark);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not append FRA_FWMARK attribute: %m");
|
|
}
|
|
|
|
if (rule->fwmask > 0) {
|
|
r = sd_netlink_message_append_u32(m, FRA_FWMASK, rule->fwmask);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not append FRA_FWMASK attribute: %m");
|
|
}
|
|
|
|
if (rule->iif) {
|
|
r = sd_netlink_message_append_string(m, FRA_IFNAME, rule->iif);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not append FRA_IFNAME attribute: %m");
|
|
}
|
|
|
|
if (rule->oif) {
|
|
r = sd_netlink_message_append_string(m, FRA_OIFNAME, rule->oif);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not append FRA_OIFNAME attribute: %m");
|
|
}
|
|
|
|
rule->link = link;
|
|
|
|
r = sd_netlink_call_async(link->manager->rtnl, m, callback, link, 0, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
|
|
r = routing_policy_rule_add(link->manager, rule->family, &rule->from, rule->from_prefixlen, &rule->to,
|
|
rule->to_prefixlen, rule->tos, rule->fwmark, rule->table, rule->iif, rule->oif, NULL);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not add rule : %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_fwmark_fwmask(const char *s, uint32_t *fwmark, uint32_t *fwmask) {
|
|
_cleanup_free_ char *f = NULL;
|
|
char *p;
|
|
int r;
|
|
|
|
assert(s);
|
|
|
|
f = strdup(s);
|
|
if (!f)
|
|
return -ENOMEM;
|
|
|
|
p = strchr(f, '/');
|
|
if (p)
|
|
*p++ = '\0';
|
|
|
|
r = safe_atou32(f, fwmark);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse RPDB rule firewall mark, ignoring: %s", f);
|
|
|
|
if (p) {
|
|
r = safe_atou32(p, fwmask);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Failed to parse RPDB rule mask, ignoring: %s", f);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_tos(
|
|
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_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = safe_atou8(rvalue, &n->tos);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule tos, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_priority(
|
|
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_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = safe_atou32(rvalue, &n->priority);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule priority, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_table(
|
|
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_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = safe_atou32(rvalue, &n->table);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule table, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_fwmark_mask(
|
|
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_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = parse_fwmark_fwmask(rvalue, &n->fwmark, &n->fwmask);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_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) {
|
|
|
|
_cleanup_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
union in_addr_union buffer;
|
|
uint8_t prefixlen;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = in_addr_prefix_from_string(rvalue, AF_INET, &buffer, &prefixlen);
|
|
if (r < 0) {
|
|
r = in_addr_prefix_from_string(rvalue, AF_INET6, &buffer, &prefixlen);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "RPDB rule prefix is invalid, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->family = AF_INET6;
|
|
} else
|
|
n->family = AF_INET;
|
|
|
|
if (streq(lvalue, "To")) {
|
|
n->to = buffer;
|
|
n->to_prefixlen = prefixlen;
|
|
} else {
|
|
n->from = buffer;
|
|
n->from_prefixlen = prefixlen;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_device(
|
|
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_routing_policy_rule_free_ RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(section);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
r = routing_policy_rule_new_static(network, filename, section_line, &n);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!ifname_valid(rvalue)) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse '%s' interface name, ignoring: %s", lvalue, rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (streq(lvalue, "IncomingInterface")) {
|
|
r = free_and_strdup(&n->iif, rvalue);
|
|
if (r < 0)
|
|
return log_oom();
|
|
} else {
|
|
r = free_and_strdup(&n->oif, rvalue);
|
|
if (r < 0)
|
|
return log_oom();
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int routing_policy_rule_read_full_file(const char *state_file, char **ret) {
|
|
_cleanup_free_ char *s = NULL;
|
|
size_t size;
|
|
int r;
|
|
|
|
assert(state_file);
|
|
|
|
r = read_full_file(state_file, &s, &size);
|
|
if (r == -ENOENT)
|
|
return -ENODATA;
|
|
if (r < 0)
|
|
return r;
|
|
if (size <= 0)
|
|
return -ENODATA;
|
|
|
|
*ret = TAKE_PTR(s);
|
|
|
|
return size;
|
|
}
|
|
|
|
int routing_policy_serialize_rules(Set *rules, FILE *f) {
|
|
RoutingPolicyRule *rule = NULL;
|
|
Iterator i;
|
|
int r;
|
|
|
|
assert(f);
|
|
|
|
SET_FOREACH(rule, rules, i) {
|
|
_cleanup_free_ char *from_str = NULL, *to_str = NULL;
|
|
bool space = false;
|
|
|
|
fputs("RULE=", f);
|
|
|
|
if (!in_addr_is_null(rule->family, &rule->from)) {
|
|
r = in_addr_to_string(rule->family, &rule->from, &from_str);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
fprintf(f, "from=%s/%hhu",
|
|
from_str, rule->from_prefixlen);
|
|
space = true;
|
|
}
|
|
|
|
if (!in_addr_is_null(rule->family, &rule->to)) {
|
|
r = in_addr_to_string(rule->family, &rule->to, &to_str);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
fprintf(f, "%sto=%s/%hhu",
|
|
space ? " " : "",
|
|
to_str, rule->to_prefixlen);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->tos != 0) {
|
|
fprintf(f, "%stos=%hhu",
|
|
space ? " " : "",
|
|
rule->tos);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->fwmark != 0) {
|
|
fprintf(f, "%sfwmark=%"PRIu32"/%"PRIu32,
|
|
space ? " " : "",
|
|
rule->fwmark, rule->fwmask);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->iif) {
|
|
fprintf(f, "%siif=%s",
|
|
space ? " " : "",
|
|
rule->iif);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->oif) {
|
|
fprintf(f, "%soif=%s",
|
|
space ? " " : "",
|
|
rule->oif);
|
|
space = true;
|
|
}
|
|
|
|
fprintf(f, "%stable=%"PRIu32 "\n",
|
|
space ? " " : "",
|
|
rule->table);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int routing_policy_load_rules(const char *state_file, Set **rules) {
|
|
_cleanup_strv_free_ char **l = NULL;
|
|
_cleanup_free_ char *data = NULL;
|
|
const char *p;
|
|
char **i;
|
|
int r;
|
|
|
|
assert(state_file);
|
|
assert(rules);
|
|
|
|
r = routing_policy_rule_read_full_file(state_file, &data);
|
|
if (r <= 0)
|
|
return r;
|
|
|
|
l = strv_split_newlines(data);
|
|
if (!l)
|
|
return -ENOMEM;
|
|
|
|
r = set_ensure_allocated(rules, &routing_policy_rule_hash_ops);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
STRV_FOREACH(i, l) {
|
|
_cleanup_routing_policy_rule_free_ RoutingPolicyRule *rule = NULL;
|
|
|
|
p = startswith(*i, "RULE=");
|
|
if (!p)
|
|
continue;
|
|
|
|
r = routing_policy_rule_new(&rule);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *word = NULL, *a = NULL, *b = NULL;
|
|
union in_addr_union buffer;
|
|
uint8_t prefixlen;
|
|
|
|
r = extract_first_word(&p, &word, NULL, 0);
|
|
if (r < 0)
|
|
return r;
|
|
if (r == 0)
|
|
break;
|
|
|
|
r = split_pair(word, "=", &a, &b);
|
|
if (r < 0)
|
|
continue;
|
|
|
|
if (STR_IN_SET(a, "from", "to")) {
|
|
|
|
r = in_addr_prefix_from_string(b, AF_INET, &buffer, &prefixlen);
|
|
if (r < 0) {
|
|
r = in_addr_prefix_from_string(b, AF_INET6, &buffer, &prefixlen);
|
|
if (r < 0) {
|
|
log_error_errno(r, "RPDB rule prefix is invalid, ignoring assignment: %s", b);
|
|
continue;
|
|
}
|
|
|
|
rule->family = AF_INET6;
|
|
} else
|
|
rule->family = AF_INET;
|
|
|
|
if (streq(a, "to")) {
|
|
rule->to = buffer;
|
|
rule->to_prefixlen = prefixlen;
|
|
} else {
|
|
rule->from = buffer;
|
|
rule->from_prefixlen = prefixlen;
|
|
}
|
|
} else if (streq(a, "tos")) {
|
|
r = safe_atou8(b, &rule->tos);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to parse RPDB rule tos, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "table")) {
|
|
r = safe_atou32(b, &rule->table);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to parse RPDB rule table, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "fwmark")) {
|
|
|
|
r = parse_fwmark_fwmask(b, &rule->fwmark, &rule->fwmask);
|
|
if (r < 0) {
|
|
log_error_errno(r, "Failed to parse RPDB rule firewall mark or mask, ignoring: %s", a);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "iif")) {
|
|
|
|
if (free_and_strdup(&rule->iif, b) < 0)
|
|
return log_oom();
|
|
|
|
} else if (streq(a, "oif")) {
|
|
|
|
if (free_and_strdup(&rule->oif, b) < 0)
|
|
return log_oom();
|
|
}
|
|
}
|
|
|
|
r = set_put(*rules, rule);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to add RPDB rule to saved DB, ignoring: %s", p);
|
|
continue;
|
|
}
|
|
|
|
rule = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void routing_policy_rule_purge(Manager *m, Link *link) {
|
|
RoutingPolicyRule *rule, *existing;
|
|
Iterator i;
|
|
int r;
|
|
|
|
assert(m);
|
|
assert(link);
|
|
|
|
SET_FOREACH(rule, m->rules_saved, i) {
|
|
existing = set_get(m->rules_foreign, rule);
|
|
if (existing) {
|
|
|
|
r = routing_policy_rule_remove(rule, link, routing_policy_rule_remove_handler);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not remove routing policy rules: %m");
|
|
continue;
|
|
}
|
|
|
|
link->routing_policy_rule_remove_messages++;
|
|
}
|
|
}
|
|
}
|