1770 lines
61 KiB
C
1770 lines
61 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <net/if.h>
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#include <linux/fib_rules.h>
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#include "af-list.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 "format-util.h"
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#include "ip-protocol-list.h"
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#include "netlink-util.h"
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#include "networkd-manager.h"
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#include "networkd-routing-policy-rule.h"
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#include "networkd-util.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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#include "strv.h"
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#include "user-util.h"
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RoutingPolicyRule *routing_policy_rule_free(RoutingPolicyRule *rule) {
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if (!rule)
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return NULL;
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if (rule->network) {
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assert(rule->section);
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hashmap_remove(rule->network->rules_by_section, rule->section);
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}
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if (rule->manager) {
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if (set_get(rule->manager->rules, rule) == rule)
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set_remove(rule->manager->rules, rule);
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if (set_get(rule->manager->rules_foreign, rule) == rule)
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set_remove(rule->manager->rules_foreign, rule);
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}
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network_config_section_free(rule->section);
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free(rule->iif);
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free(rule->oif);
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return mfree(rule);
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}
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DEFINE_NETWORK_SECTION_FUNCTIONS(RoutingPolicyRule, routing_policy_rule_free);
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static int routing_policy_rule_new(RoutingPolicyRule **ret) {
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RoutingPolicyRule *rule;
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rule = new(RoutingPolicyRule, 1);
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if (!rule)
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return -ENOMEM;
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*rule = (RoutingPolicyRule) {
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.table = RT_TABLE_MAIN,
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.uid_range.start = UID_INVALID,
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.uid_range.end = UID_INVALID,
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.suppress_prefixlen = -1,
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};
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*ret = rule;
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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_freep) RoutingPolicyRule *rule = NULL;
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_cleanup_(network_config_section_freep) 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);
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assert(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 = TAKE_PTR(rule);
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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->network = network;
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rule->section = TAKE_PTR(n);
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r = hashmap_ensure_allocated(&network->rules_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->rules_by_section, rule->section, rule);
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if (r < 0)
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return r;
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*ret = TAKE_PTR(rule);
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return 0;
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}
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static int routing_policy_rule_copy(RoutingPolicyRule *dest, RoutingPolicyRule *src) {
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_cleanup_free_ char *iif = NULL, *oif = NULL;
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assert(dest);
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assert(src);
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if (src->iif) {
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iif = strdup(src->iif);
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if (!iif)
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return -ENOMEM;
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}
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if (src->oif) {
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oif = strdup(src->oif);
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if (!oif)
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return -ENOMEM;
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}
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dest->family = src->family;
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dest->from = src->from;
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dest->from_prefixlen = src->from_prefixlen;
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dest->to = src->to;
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dest->to_prefixlen = src->to_prefixlen;
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dest->invert_rule = src->invert_rule;
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dest->tos = src->tos;
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dest->fwmark = src->fwmark;
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dest->fwmask = src->fwmask;
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dest->priority = src->priority;
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dest->table = src->table;
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dest->iif = TAKE_PTR(iif);
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dest->oif = TAKE_PTR(oif);
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dest->protocol = src->protocol;
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dest->sport = src->sport;
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dest->dport = src->dport;
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dest->uid_range = src->uid_range;
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dest->suppress_prefixlen = src->suppress_prefixlen;
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return 0;
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}
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static void routing_policy_rule_hash_func(const RoutingPolicyRule *rule, struct siphash *state) {
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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_boolean(rule->invert_rule, 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->fwmask, sizeof(rule->fwmask), state);
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siphash24_compress(&rule->priority, sizeof(rule->priority), state);
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siphash24_compress(&rule->table, sizeof(rule->table), state);
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siphash24_compress(&rule->suppress_prefixlen, sizeof(rule->suppress_prefixlen), state);
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siphash24_compress(&rule->protocol, sizeof(rule->protocol), state);
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siphash24_compress(&rule->sport, sizeof(rule->sport), state);
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siphash24_compress(&rule->dport, sizeof(rule->dport), state);
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siphash24_compress(&rule->uid_range, sizeof(rule->uid_range), state);
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siphash24_compress_string(rule->iif, state);
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siphash24_compress_string(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 RoutingPolicyRule *a, const RoutingPolicyRule *b) {
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int r;
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r = CMP(a->family, b->family);
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if (r != 0)
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return r;
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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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r = CMP(a->from_prefixlen, b->from_prefixlen);
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if (r != 0)
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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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r = CMP(a->to_prefixlen, b->to_prefixlen);
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if (r != 0)
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return r;
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r = memcmp(&a->to, &b->to, FAMILY_ADDRESS_SIZE(a->family));
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if (r != 0)
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return r;
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r = CMP(a->invert_rule, b->invert_rule);
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if (r != 0)
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return r;
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r = CMP(a->tos, b->tos);
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if (r != 0)
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return r;
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r = CMP(a->fwmark, b->fwmark);
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if (r != 0)
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return r;
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r = CMP(a->fwmask, b->fwmask);
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if (r != 0)
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return r;
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r = CMP(a->priority, b->priority);
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if (r != 0)
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return r;
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r = CMP(a->table, b->table);
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if (r != 0)
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return r;
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r = CMP(a->suppress_prefixlen, b->suppress_prefixlen);
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if (r != 0)
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return r;
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r = CMP(a->protocol, b->protocol);
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if (r != 0)
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return r;
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r = memcmp(&a->sport, &b->sport, sizeof(a->sport));
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if (r != 0)
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return r;
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r = memcmp(&a->dport, &b->dport, sizeof(a->dport));
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if (r != 0)
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return r;
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r = memcmp(&a->uid_range, &b->uid_range, sizeof(a->uid_range));
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if (r != 0)
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return r;
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r = strcmp_ptr(a->iif, b->iif);
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if (r != 0)
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return r;
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r = strcmp_ptr(a->oif, b->oif);
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if (r != 0)
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return r;
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return 0;
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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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static bool routing_policy_rule_equal(const RoutingPolicyRule *rule1, const RoutingPolicyRule *rule2) {
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if (rule1 == rule2)
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return true;
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if (!rule1 || !rule2)
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return false;
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return routing_policy_rule_compare_func(rule1, rule2) == 0;
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}
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DEFINE_PRIVATE_HASH_OPS_WITH_KEY_DESTRUCTOR(
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routing_policy_rule_hash_ops,
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RoutingPolicyRule,
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routing_policy_rule_hash_func,
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routing_policy_rule_compare_func,
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routing_policy_rule_free);
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static int routing_policy_rule_get(Manager *m, RoutingPolicyRule *rule, RoutingPolicyRule **ret) {
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RoutingPolicyRule *existing;
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assert(m);
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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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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 0;
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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, Set **rules, RoutingPolicyRule *in, int family, RoutingPolicyRule **ret) {
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_cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
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int r;
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assert(m);
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assert(rules);
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assert(in);
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assert(IN_SET(family, AF_INET, AF_INET6));
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assert(in->family == AF_UNSPEC || in->family == family);
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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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r = routing_policy_rule_copy(rule, in);
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if (r < 0)
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return r;
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rule->family = family;
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r = set_ensure_put(rules, &routing_policy_rule_hash_ops, rule);
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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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if (ret)
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*ret = rule;
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TAKE_PTR(rule);
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return 0;
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}
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static int routing_policy_rule_add(Manager *m, RoutingPolicyRule *rule, int family, RoutingPolicyRule **ret) {
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return routing_policy_rule_add_internal(m, &m->rules, rule, family, ret);
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}
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static int routing_policy_rule_add_foreign(Manager *m, RoutingPolicyRule *rule, RoutingPolicyRule **ret) {
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return routing_policy_rule_add_internal(m, &m->rules_foreign, rule, rule->family, ret);
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}
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static void log_routing_policy_rule_debug(const RoutingPolicyRule *rule, int family, const char *str, const Link *link) {
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assert(rule);
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assert(IN_SET(family, AF_INET, AF_INET6));
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assert(str);
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/* link may be NULL. */
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *from = NULL, *to = NULL;
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(void) in_addr_to_string(family, &rule->from, &from);
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(void) in_addr_to_string(family, &rule->to, &to);
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log_link_debug(link,
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"%s routing policy rule: priority: %"PRIu32", %s/%u -> %s/%u, iif: %s, oif: %s, table: %"PRIu32,
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str, rule->priority, strna(from), rule->from_prefixlen, strna(to), rule->to_prefixlen,
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strna(rule->iif), strna(rule->oif), rule->table);
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}
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}
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static int routing_policy_rule_set_netlink_message(RoutingPolicyRule *rule, sd_netlink_message *m, Link *link) {
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int r;
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assert(rule);
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assert(m);
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/* link may be NULL. */
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if (in_addr_is_null(rule->family, &rule->from) == 0) {
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r = netlink_message_append_in_addr_union(m, FRA_SRC, rule->family, &rule->from);
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if (r < 0)
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return log_link_error_errno(link, 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_link_error_errno(link, 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) == 0) {
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r = netlink_message_append_in_addr_union(m, FRA_DST, rule->family, &rule->to);
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if (r < 0)
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return log_link_error_errno(link, 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_link_error_errno(link, 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_link_error_errno(link, 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_link_error_errno(link, r, "Could not set IP rule TOS: %m");
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}
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if (rule->table < 256) {
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r = sd_rtnl_message_routing_policy_rule_set_table(m, rule->table);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not set IP rule table: %m");
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} else {
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r = sd_rtnl_message_routing_policy_rule_set_table(m, RT_TABLE_UNSPEC);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not set IP rule table: %m");
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r = sd_netlink_message_append_u32(m, FRA_TABLE, rule->table);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_TABLE attribute: %m");
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}
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if (rule->fwmark > 0) {
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r = sd_netlink_message_append_u32(m, FRA_FWMARK, rule->fwmark);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_FWMARK attribute: %m");
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r = sd_netlink_message_append_u32(m, FRA_FWMASK, rule->fwmask);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_FWMASK attribute: %m");
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}
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if (rule->iif) {
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r = sd_netlink_message_append_string(m, FRA_IIFNAME, rule->iif);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_IIFNAME attribute: %m");
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}
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if (rule->oif) {
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r = sd_netlink_message_append_string(m, FRA_OIFNAME, rule->oif);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_OIFNAME attribute: %m");
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}
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r = sd_netlink_message_append_u8(m, FRA_IP_PROTO, rule->protocol);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_IP_PROTO attribute: %m");
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if (rule->sport.start != 0 || rule->sport.end != 0) {
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r = sd_netlink_message_append_data(m, FRA_SPORT_RANGE, &rule->sport, sizeof(rule->sport));
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_SPORT_RANGE attribute: %m");
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}
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if (rule->dport.start != 0 || rule->dport.end != 0) {
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r = sd_netlink_message_append_data(m, FRA_DPORT_RANGE, &rule->dport, sizeof(rule->dport));
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_DPORT_RANGE attribute: %m");
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}
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if (rule->uid_range.start != UID_INVALID && rule->uid_range.end != UID_INVALID) {
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r = sd_netlink_message_append_data(m, FRA_UID_RANGE, &rule->uid_range, sizeof(rule->uid_range));
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_UID_RANGE attribute: %m");
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}
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if (rule->invert_rule) {
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r = sd_rtnl_message_routing_policy_rule_set_flags(m, FIB_RULE_INVERT);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FIB_RULE_INVERT attribute: %m");
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}
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if (rule->suppress_prefixlen >= 0) {
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r = sd_netlink_message_append_u32(m, FRA_SUPPRESS_PREFIXLEN, (uint32_t) rule->suppress_prefixlen);
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if (r < 0)
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return log_link_error_errno(link, r, "Could not append FRA_SUPPRESS_PREFIXLEN attribute: %m");
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}
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return 0;
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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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int r;
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assert(m);
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r = sd_netlink_message_get_errno(m);
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if (r < 0)
|
|
log_message_warning_errno(m, r, "Could not drop routing policy rule");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int routing_policy_rule_remove(RoutingPolicyRule *rule, Manager *manager) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
|
|
int r;
|
|
|
|
assert(rule);
|
|
assert(manager);
|
|
assert(manager->rtnl);
|
|
assert(IN_SET(rule->family, AF_INET, AF_INET6));
|
|
|
|
log_routing_policy_rule_debug(rule, rule->family, "Removing", NULL);
|
|
|
|
r = sd_rtnl_message_new_routing_policy_rule(manager->rtnl, &m, RTM_DELRULE, rule->family);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not allocate RTM_DELRULE message: %m");
|
|
|
|
r = routing_policy_rule_set_netlink_message(rule, m, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call_async(manager->rtnl, NULL, m,
|
|
routing_policy_rule_remove_handler,
|
|
NULL, NULL, 0, __func__);
|
|
if (r < 0)
|
|
return log_error_errno(r, "Could not send rtnetlink message: %m");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int routing_policy_rule_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
|
|
int r;
|
|
|
|
assert(rtnl);
|
|
assert(m);
|
|
assert(link);
|
|
assert(link->ifname);
|
|
assert(link->routing_policy_rule_messages > 0);
|
|
|
|
link->routing_policy_rule_messages--;
|
|
|
|
if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
|
|
return 1;
|
|
|
|
r = sd_netlink_message_get_errno(m);
|
|
if (r < 0 && r != -EEXIST) {
|
|
log_link_message_warning_errno(link, m, r, "Could not add routing policy rule");
|
|
link_enter_failed(link);
|
|
return 1;
|
|
}
|
|
|
|
if (link->routing_policy_rule_messages == 0) {
|
|
log_link_debug(link, "Routing policy rule configured");
|
|
link->routing_policy_rules_configured = true;
|
|
link_check_ready(link);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int routing_policy_rule_configure_internal(RoutingPolicyRule *rule, int family, Link *link) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *m = NULL;
|
|
int r;
|
|
|
|
assert(rule);
|
|
assert(link);
|
|
assert(link->ifindex > 0);
|
|
assert(link->manager);
|
|
assert(link->manager->rtnl);
|
|
|
|
log_routing_policy_rule_debug(rule, family, "Configuring", link);
|
|
|
|
r = sd_rtnl_message_new_routing_policy_rule(link->manager->rtnl, &m, RTM_NEWRULE, family);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not allocate RTM_NEWRULE message: %m");
|
|
|
|
r = routing_policy_rule_set_netlink_message(rule, m, link);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = netlink_call_async(link->manager->rtnl, NULL, m,
|
|
routing_policy_rule_handler,
|
|
link_netlink_destroy_callback, link);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
|
|
|
|
link_ref(link);
|
|
link->routing_policy_rule_messages++;
|
|
|
|
r = routing_policy_rule_add(link->manager, rule, family, NULL);
|
|
if (r < 0)
|
|
return log_link_error_errno(link, r, "Could not add rule: %m");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int routing_policy_rule_configure(RoutingPolicyRule *rule, Link *link) {
|
|
int r;
|
|
|
|
if (IN_SET(rule->family, AF_INET, AF_INET6))
|
|
return routing_policy_rule_configure_internal(rule, rule->family, link);
|
|
|
|
if (FLAGS_SET(rule->address_family, ADDRESS_FAMILY_IPV4)) {
|
|
r = routing_policy_rule_configure_internal(rule, AF_INET, link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (FLAGS_SET(rule->address_family, ADDRESS_FAMILY_IPV6)) {
|
|
r = routing_policy_rule_configure_internal(rule, AF_INET6, link);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool manager_links_have_routing_policy_rule(Manager *m, RoutingPolicyRule *rule) {
|
|
Link *link;
|
|
|
|
assert(m);
|
|
assert(rule);
|
|
|
|
HASHMAP_FOREACH(link, m->links) {
|
|
RoutingPolicyRule *link_rule;
|
|
|
|
if (!link->network)
|
|
continue;
|
|
|
|
HASHMAP_FOREACH(link_rule, link->network->rules_by_section)
|
|
if (routing_policy_rule_equal(link_rule, rule))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void routing_policy_rule_purge(Manager *m) {
|
|
RoutingPolicyRule *rule;
|
|
int r;
|
|
|
|
assert(m);
|
|
|
|
SET_FOREACH(rule, m->rules_saved) {
|
|
RoutingPolicyRule *existing;
|
|
|
|
existing = set_get(m->rules_foreign, rule);
|
|
if (!existing)
|
|
continue; /* Saved rule does not exist anymore. */
|
|
|
|
if (manager_links_have_routing_policy_rule(m, existing))
|
|
continue; /* Existing links have the saved rule. */
|
|
|
|
/* Existing links do not have the saved rule. Let's drop the rule now, and re-configure it
|
|
* later when it is requested. */
|
|
|
|
r = routing_policy_rule_remove(existing, m);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not remove routing policy rules: %m");
|
|
continue;
|
|
}
|
|
|
|
assert_se(set_remove(m->rules_foreign, existing) == existing);
|
|
routing_policy_rule_free(existing);
|
|
}
|
|
}
|
|
|
|
int link_set_routing_policy_rules(Link *link) {
|
|
RoutingPolicyRule *rule;
|
|
int r;
|
|
|
|
assert(link);
|
|
assert(link->network);
|
|
|
|
if (link->routing_policy_rule_messages != 0) {
|
|
log_link_debug(link, "Routing policy rules are configuring.");
|
|
return 0;
|
|
}
|
|
|
|
link->routing_policy_rules_configured = false;
|
|
|
|
HASHMAP_FOREACH(rule, link->network->rules_by_section) {
|
|
RoutingPolicyRule *existing;
|
|
|
|
r = routing_policy_rule_get(link->manager, rule, &existing);
|
|
if (r > 0)
|
|
continue;
|
|
if (r == 0) {
|
|
r = set_ensure_put(&link->manager->rules, &routing_policy_rule_hash_ops, existing);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not store existing routing policy rule: %m");
|
|
|
|
set_remove(link->manager->rules_foreign, existing);
|
|
continue;
|
|
}
|
|
|
|
r = routing_policy_rule_configure(rule, link);
|
|
if (r < 0)
|
|
return log_link_warning_errno(link, r, "Could not set routing policy rule: %m");
|
|
}
|
|
|
|
routing_policy_rule_purge(link->manager);
|
|
if (link->routing_policy_rule_messages == 0)
|
|
link->routing_policy_rules_configured = true;
|
|
else {
|
|
log_link_debug(link, "Setting routing policy rules");
|
|
link_set_state(link, LINK_STATE_CONFIGURING);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int manager_rtnl_process_rule(sd_netlink *rtnl, sd_netlink_message *message, Manager *m) {
|
|
_cleanup_(routing_policy_rule_freep) RoutingPolicyRule *tmp = NULL;
|
|
RoutingPolicyRule *rule = NULL;
|
|
const char *iif = NULL, *oif = NULL;
|
|
uint32_t suppress_prefixlen;
|
|
unsigned flags;
|
|
uint16_t type;
|
|
int r;
|
|
|
|
assert(rtnl);
|
|
assert(message);
|
|
|
|
if (sd_netlink_message_is_error(message)) {
|
|
r = sd_netlink_message_get_errno(message);
|
|
if (r < 0)
|
|
log_message_warning_errno(message, r, "rtnl: failed to receive rule message, ignoring");
|
|
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_get_type(message, &type);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get message type, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(type, RTM_NEWRULE, RTM_DELRULE)) {
|
|
log_warning("rtnl: received unexpected message type %u when processing rule, ignoring.", type);
|
|
return 0;
|
|
}
|
|
|
|
r = routing_policy_rule_new(&tmp);
|
|
if (r < 0) {
|
|
log_oom();
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_get_family(message, &tmp->family);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: could not get rule family, ignoring: %m");
|
|
return 0;
|
|
} else if (!IN_SET(tmp->family, AF_INET, AF_INET6)) {
|
|
log_debug("rtnl: received rule message with invalid family %d, ignoring.", tmp->family);
|
|
return 0;
|
|
}
|
|
|
|
r = netlink_message_read_in_addr_union(message, FRA_SRC, tmp->family, &tmp->from);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_SRC attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(message, &tmp->from_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: received rule message without valid source prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = netlink_message_read_in_addr_union(message, FRA_DST, tmp->family, &tmp->to);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_DST attribute, ignoring: %m");
|
|
return 0;
|
|
} else if (r >= 0) {
|
|
r = sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(message, &tmp->to_prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: received rule message without valid destination prefix length, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
r = sd_rtnl_message_routing_policy_rule_get_flags(message, &flags);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "rtnl: received rule message without valid flag, ignoring: %m");
|
|
return 0;
|
|
}
|
|
tmp->invert_rule = flags & FIB_RULE_INVERT;
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_FWMARK, &tmp->fwmark);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_FWMARK attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_FWMASK, &tmp->fwmask);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_FWMASK attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_PRIORITY, &tmp->priority);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_PRIORITY attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_TABLE, &tmp->table);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_TABLE attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_rtnl_message_routing_policy_rule_get_tos(message, &tmp->tos);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get ip rule TOS, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_string(message, FRA_IIFNAME, &iif);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_IIFNAME attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
r = free_and_strdup(&tmp->iif, iif);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
r = sd_netlink_message_read_string(message, FRA_OIFNAME, &oif);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_OIFNAME attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
r = free_and_strdup(&tmp->oif, oif);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
r = sd_netlink_message_read_u8(message, FRA_IP_PROTO, &tmp->protocol);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_IP_PROTO attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read(message, FRA_SPORT_RANGE, sizeof(tmp->sport), &tmp->sport);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_SPORT_RANGE attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read(message, FRA_DPORT_RANGE, sizeof(tmp->dport), &tmp->dport);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_DPORT_RANGE attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read(message, FRA_UID_RANGE, sizeof(tmp->uid_range), &tmp->uid_range);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_UID_RANGE attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
|
|
r = sd_netlink_message_read_u32(message, FRA_SUPPRESS_PREFIXLEN, &suppress_prefixlen);
|
|
if (r < 0 && r != -ENODATA) {
|
|
log_warning_errno(r, "rtnl: could not get FRA_SUPPRESS_PREFIXLEN attribute, ignoring: %m");
|
|
return 0;
|
|
}
|
|
if (r >= 0)
|
|
tmp->suppress_prefixlen = (int) suppress_prefixlen;
|
|
|
|
(void) routing_policy_rule_get(m, tmp, &rule);
|
|
|
|
switch (type) {
|
|
case RTM_NEWRULE:
|
|
if (rule)
|
|
log_routing_policy_rule_debug(tmp, tmp->family, "Received remembered", NULL);
|
|
else {
|
|
log_routing_policy_rule_debug(tmp, tmp->family, "Remembering foreign", NULL);
|
|
r = routing_policy_rule_add_foreign(m, tmp, &rule);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Could not remember foreign rule, ignoring: %m");
|
|
return 0;
|
|
}
|
|
}
|
|
break;
|
|
case RTM_DELRULE:
|
|
if (rule) {
|
|
log_routing_policy_rule_debug(tmp, tmp->family, "Forgetting", NULL);
|
|
routing_policy_rule_free(rule);
|
|
} else
|
|
log_routing_policy_rule_debug(tmp, tmp->family, "Kernel removed unknown", NULL);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Received invalid RTNL message type");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int parse_fwmark_fwmask(const char *s, uint32_t *ret_fwmark, uint32_t *ret_fwmask) {
|
|
_cleanup_free_ char *fwmark_str = NULL;
|
|
uint32_t fwmark, fwmask = 0;
|
|
const char *slash;
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(ret_fwmark);
|
|
assert(ret_fwmask);
|
|
|
|
slash = strchr(s, '/');
|
|
if (slash) {
|
|
fwmark_str = strndup(s, slash - s);
|
|
if (!fwmark_str)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
r = safe_atou32(fwmark_str ?: s, &fwmark);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (fwmark > 0) {
|
|
if (slash) {
|
|
r = safe_atou32(slash + 1, &fwmask);
|
|
if (r < 0)
|
|
return r;
|
|
} else
|
|
fwmask = UINT32_MAX;
|
|
}
|
|
|
|
*ret_fwmark = fwmark;
|
|
*ret_fwmask = fwmask;
|
|
|
|
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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = safe_atou8(rvalue, &n->tos);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, 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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = safe_atou32(rvalue, &n->priority);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, 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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = safe_atou32(rvalue, &n->table);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, 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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = parse_fwmark_fwmask(rvalue, &n->fwmark, &n->fwmask);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, 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_or_set_invalidp) 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 log_oom();
|
|
|
|
if (streq(lvalue, "To")) {
|
|
buffer = &n->to;
|
|
prefixlen = &n->to_prefixlen;
|
|
} else {
|
|
buffer = &n->from;
|
|
prefixlen = &n->from_prefixlen;
|
|
}
|
|
|
|
if (n->family == AF_UNSPEC)
|
|
r = in_addr_prefix_from_string_auto(rvalue, &n->family, buffer, prefixlen);
|
|
else
|
|
r = in_addr_prefix_from_string(rvalue, n->family, buffer, prefixlen);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "RPDB rule prefix is invalid, ignoring assignment: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
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_or_set_invalidp) 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 log_oom();
|
|
|
|
if (!ifname_valid(rvalue)) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0, "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;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_port_range(
|
|
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_or_set_invalidp) RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
uint16_t low, high;
|
|
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 log_oom();
|
|
|
|
r = parse_ip_port_range(rvalue, &low, &high);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse routing policy rule port range '%s'", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
if (streq(lvalue, "SourcePort")) {
|
|
n->sport.start = low;
|
|
n->sport.end = high;
|
|
} else {
|
|
n->dport.start = low;
|
|
n->dport.end = high;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_ip_protocol(
|
|
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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = parse_ip_protocol(rvalue);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse IP protocol '%s' for routing policy rule, ignoring: %m", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->protocol = r;
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_invert(
|
|
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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = parse_boolean(rvalue);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse RPDB rule invert, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->invert_rule = r;
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_family(
|
|
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_or_set_invalidp) RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
AddressFamily a;
|
|
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 log_oom();
|
|
|
|
a = routing_policy_rule_address_family_from_string(rvalue);
|
|
if (a < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, 0,
|
|
"Invalid address family '%s', ignoring.", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n->address_family = a;
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_uid_range(
|
|
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_or_set_invalidp) RoutingPolicyRule *n = NULL;
|
|
Network *network = userdata;
|
|
uid_t start, end;
|
|
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 log_oom();
|
|
|
|
r = get_user_creds(&rvalue, &start, NULL, NULL, NULL, 0);
|
|
if (r >= 0)
|
|
end = start;
|
|
else {
|
|
r = parse_uid_range(rvalue, &start, &end);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r,
|
|
"Invalid uid or uid range '%s', ignoring: %m", rvalue);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
n->uid_range.start = start;
|
|
n->uid_range.end = end;
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_routing_policy_rule_suppress_prefixlen(
|
|
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_or_set_invalidp) 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 log_oom();
|
|
|
|
r = parse_ip_prefix_length(rvalue, &n->suppress_prefixlen);
|
|
if (r == -ERANGE) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Prefix length outside of valid range 0-128, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse RPDB rule suppress_prefixlen, ignoring: %s", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
n = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int routing_policy_rule_section_verify(RoutingPolicyRule *rule) {
|
|
if (section_is_invalid(rule->section))
|
|
return -EINVAL;
|
|
|
|
if ((rule->family == AF_INET && FLAGS_SET(rule->address_family, ADDRESS_FAMILY_IPV6)) ||
|
|
(rule->family == AF_INET6 && FLAGS_SET(rule->address_family, ADDRESS_FAMILY_IPV4)))
|
|
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
|
|
"%s: address family specified by Family= conflicts with the address "
|
|
"specified by To= or From=. Ignoring [RoutingPolicyRule] section from line %u.",
|
|
rule->section->filename, rule->section->line);
|
|
|
|
if (rule->family == AF_UNSPEC && rule->address_family == ADDRESS_FAMILY_NO)
|
|
rule->family = AF_INET;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void network_drop_invalid_routing_policy_rules(Network *network) {
|
|
RoutingPolicyRule *rule;
|
|
|
|
assert(network);
|
|
|
|
HASHMAP_FOREACH(rule, network->rules_by_section)
|
|
if (routing_policy_rule_section_verify(rule) < 0)
|
|
routing_policy_rule_free(rule);
|
|
}
|
|
|
|
int routing_policy_serialize_rules(Set *rules, FILE *f) {
|
|
RoutingPolicyRule *rule;
|
|
int r;
|
|
|
|
assert(f);
|
|
|
|
SET_FOREACH(rule, rules) {
|
|
const char *family_str;
|
|
bool space = false;
|
|
|
|
fputs("RULE=", f);
|
|
|
|
family_str = af_to_name(rule->family);
|
|
if (family_str) {
|
|
fprintf(f, "family=%s",
|
|
family_str);
|
|
space = true;
|
|
}
|
|
|
|
if (!in_addr_is_null(rule->family, &rule->from)) {
|
|
_cleanup_free_ char *str = NULL;
|
|
|
|
r = in_addr_to_string(rule->family, &rule->from, &str);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
fprintf(f, "%sfrom=%s/%hhu",
|
|
space ? " " : "",
|
|
str, rule->from_prefixlen);
|
|
space = true;
|
|
}
|
|
|
|
if (!in_addr_is_null(rule->family, &rule->to)) {
|
|
_cleanup_free_ char *str = NULL;
|
|
|
|
r = in_addr_to_string(rule->family, &rule->to, &str);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
fprintf(f, "%sto=%s/%hhu",
|
|
space ? " " : "",
|
|
str, rule->to_prefixlen);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->tos != 0) {
|
|
fprintf(f, "%stos=%hhu",
|
|
space ? " " : "",
|
|
rule->tos);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->priority != 0) {
|
|
fprintf(f, "%spriority=%"PRIu32,
|
|
space ? " " : "",
|
|
rule->priority);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->fwmark != 0) {
|
|
fprintf(f, "%sfwmark=%"PRIu32,
|
|
space ? " " : "",
|
|
rule->fwmark);
|
|
if (rule->fwmask != UINT32_MAX)
|
|
fprintf(f, "/%"PRIu32, 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;
|
|
}
|
|
|
|
if (rule->protocol != 0) {
|
|
fprintf(f, "%sprotocol=%hhu",
|
|
space ? " " : "",
|
|
rule->protocol);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->sport.start != 0 || rule->sport.end != 0) {
|
|
fprintf(f, "%ssourcesport=%"PRIu16"-%"PRIu16,
|
|
space ? " " : "",
|
|
rule->sport.start, rule->sport.end);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->dport.start != 0 || rule->dport.end != 0) {
|
|
fprintf(f, "%sdestinationport=%"PRIu16"-%"PRIu16,
|
|
space ? " " : "",
|
|
rule->dport.start, rule->dport.end);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->uid_range.start != UID_INVALID && rule->uid_range.end != UID_INVALID) {
|
|
assert_cc(sizeof(uid_t) == sizeof(uint32_t));
|
|
fprintf(f, "%suidrange="UID_FMT"-"UID_FMT,
|
|
space ? " " : "",
|
|
rule->uid_range.start, rule->uid_range.end);
|
|
space = true;
|
|
}
|
|
|
|
if (rule->suppress_prefixlen >= 0) {
|
|
fprintf(f, "%ssuppress_prefixlen=%d",
|
|
space ? " " : "",
|
|
rule->suppress_prefixlen);
|
|
space = true;
|
|
}
|
|
|
|
fprintf(f, "%sinvert_rule=%s table=%"PRIu32"\n",
|
|
space ? " " : "",
|
|
yes_no(rule->invert_rule),
|
|
rule->table);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int routing_policy_rule_read_full_file(const char *state_file, char ***ret) {
|
|
_cleanup_strv_free_ char **lines = NULL;
|
|
_cleanup_free_ char *s = NULL;
|
|
int r;
|
|
|
|
assert(state_file);
|
|
|
|
r = read_full_file(state_file, &s, NULL);
|
|
if (r == -ENOENT) {
|
|
*ret = NULL;
|
|
return 0;
|
|
}
|
|
if (r < 0)
|
|
return r;
|
|
|
|
lines = strv_split_newlines(s);
|
|
if (!lines)
|
|
return -ENOMEM;
|
|
|
|
*ret = TAKE_PTR(lines);
|
|
return 0;
|
|
}
|
|
|
|
int routing_policy_load_rules(const char *state_file, Set **rules) {
|
|
_cleanup_strv_free_ char **data = NULL;
|
|
char **i;
|
|
int r;
|
|
|
|
assert(state_file);
|
|
assert(rules);
|
|
|
|
r = routing_policy_rule_read_full_file(state_file, &data);
|
|
if (r < 0)
|
|
return log_warning_errno(r, "Failed to read %s, ignoring: %m", state_file);
|
|
|
|
STRV_FOREACH(i, data) {
|
|
_cleanup_(routing_policy_rule_freep) RoutingPolicyRule *rule = NULL;
|
|
const char *p;
|
|
|
|
p = startswith(*i, "RULE=");
|
|
if (!p)
|
|
continue;
|
|
|
|
r = routing_policy_rule_new(&rule);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
for (;;) {
|
|
_cleanup_free_ char *a = NULL;
|
|
char *b;
|
|
|
|
r = extract_first_word(&p, &a, NULL, 0);
|
|
if (r < 0)
|
|
return log_oom();
|
|
if (r == 0)
|
|
break;
|
|
|
|
b = strchr(a, '=');
|
|
if (!b) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule, ignoring: %s", a);
|
|
continue;
|
|
}
|
|
*b++ = '\0';
|
|
|
|
if (streq(a, "family")) {
|
|
r = af_from_name(b);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule family, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
if (rule->family != AF_UNSPEC && rule->family != r) {
|
|
log_warning("RPDB rule family is already specified, ignoring assignment: %s", b);
|
|
continue;
|
|
}
|
|
rule->family = r;
|
|
} else if (STR_IN_SET(a, "from", "to")) {
|
|
union in_addr_union *buffer;
|
|
uint8_t *prefixlen;
|
|
|
|
if (streq(a, "to")) {
|
|
buffer = &rule->to;
|
|
prefixlen = &rule->to_prefixlen;
|
|
} else {
|
|
buffer = &rule->from;
|
|
prefixlen = &rule->from_prefixlen;
|
|
}
|
|
|
|
if (rule->family == AF_UNSPEC)
|
|
r = in_addr_prefix_from_string_auto(b, &rule->family, buffer, prefixlen);
|
|
else
|
|
r = in_addr_prefix_from_string(b, rule->family, buffer, prefixlen);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "RPDB rule prefix is invalid, ignoring assignment: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "tos")) {
|
|
r = safe_atou8(b, &rule->tos);
|
|
if (r < 0) {
|
|
log_warning_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_warning_errno(r, "Failed to parse RPDB rule table, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "priority")) {
|
|
r = safe_atou32(b, &rule->priority);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule priority, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "fwmark")) {
|
|
r = parse_fwmark_fwmask(b, &rule->fwmark, &rule->fwmask);
|
|
if (r < 0) {
|
|
log_warning_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();
|
|
} else if (streq(a, "protocol")) {
|
|
r = safe_atou8(b, &rule->protocol);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule protocol, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "sourceport")) {
|
|
uint16_t low, high;
|
|
|
|
r = parse_ip_port_range(b, &low, &high);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Invalid routing policy rule source port range, ignoring assignment: '%s'", b);
|
|
continue;
|
|
}
|
|
|
|
rule->sport.start = low;
|
|
rule->sport.end = high;
|
|
} else if (streq(a, "destinationport")) {
|
|
uint16_t low, high;
|
|
|
|
r = parse_ip_port_range(b, &low, &high);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Invalid routing policy rule destination port range, ignoring assignment: '%s'", b);
|
|
continue;
|
|
}
|
|
|
|
rule->dport.start = low;
|
|
rule->dport.end = high;
|
|
} else if (streq(a, "uidrange")) {
|
|
uid_t lower, upper;
|
|
|
|
r = parse_uid_range(b, &lower, &upper);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Invalid routing policy rule uid range, ignoring assignment: '%s'", b);
|
|
continue;
|
|
}
|
|
|
|
rule->uid_range.start = lower;
|
|
rule->uid_range.end = upper;
|
|
} else if (streq(a, "suppress_prefixlen")) {
|
|
r = parse_ip_prefix_length(b, &rule->suppress_prefixlen);
|
|
if (r == -ERANGE) {
|
|
log_warning_errno(r, "Prefix length outside of valid range 0-128, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule suppress_prefixlen, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
} else if (streq(a, "invert_rule")) {
|
|
r = parse_boolean(b);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to parse RPDB rule invert_rule, ignoring: %s", b);
|
|
continue;
|
|
}
|
|
rule->invert_rule = r;
|
|
} else
|
|
log_warning("Unknown RPDB rule, ignoring: %s", a);
|
|
}
|
|
|
|
r = set_ensure_put(rules, &routing_policy_rule_hash_ops, rule);
|
|
if (r < 0) {
|
|
log_warning_errno(r, "Failed to add RPDB rule to saved DB, ignoring: %s", *i);
|
|
continue;
|
|
}
|
|
if (r > 0)
|
|
rule = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|