[thirdparty/systemd.git] / src / network / networkd-radv.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  Copyright © 2017 Intel Corporation. All rights reserved.
***/

#include <netinet/icmp6.h>
#include <arpa/inet.h>

#include "dns-domain.h"
#include "networkd-address.h"
#include "networkd-manager.h"
#include "networkd-radv.h"
#include "parse-util.h"
#include "sd-radv.h"
#include "string-util.h"
#include "string-table.h"
#include "strv.h"

void prefix_free(Prefix *prefix) {
        if (!prefix)
                return;

        if (prefix->network) {
                LIST_REMOVE(prefixes, prefix->network->static_prefixes, prefix);
                assert(prefix->network->n_static_prefixes > 0);
                prefix->network->n_static_prefixes--;

                if (prefix->section)
                        hashmap_remove(prefix->network->prefixes_by_section,
                                       prefix->section);
        }

        network_config_section_free(prefix->section);
        sd_radv_prefix_unref(prefix->radv_prefix);

        free(prefix);
}

int prefix_new(Prefix **ret) {
        _cleanup_(prefix_freep) Prefix *prefix = NULL;

        prefix = new0(Prefix, 1);
        if (!prefix)
                return -ENOMEM;

        if (sd_radv_prefix_new(&prefix->radv_prefix) < 0)
                return -ENOMEM;

        *ret = TAKE_PTR(prefix);

        return 0;
}

static int prefix_new_static(Network *network, const char *filename,
                             unsigned section_line, Prefix **ret) {
        _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
        _cleanup_(prefix_freep) Prefix *prefix = NULL;
        int r;

        assert(network);
        assert(ret);
        assert(!!filename == (section_line > 0));

        if (filename) {
                r = network_config_section_new(filename, section_line, &n);
                if (r < 0)
                        return r;

                if (section_line) {
                        prefix = hashmap_get(network->prefixes_by_section, n);
                        if (prefix) {
                                *ret = TAKE_PTR(prefix);

                                return 0;
                        }
                }
        }

        r = prefix_new(&prefix);
        if (r < 0)
                return r;

        prefix->network = network;
        LIST_APPEND(prefixes, network->static_prefixes, prefix);
        network->n_static_prefixes++;

        if (filename) {
                prefix->section = TAKE_PTR(n);

                r = hashmap_ensure_allocated(&network->prefixes_by_section, &network_config_hash_ops);
                if (r < 0)
                        return r;

                r = hashmap_put(network->prefixes_by_section, prefix->section, prefix);
                if (r < 0)
                        return r;
        }

        *ret = TAKE_PTR(prefix);

        return 0;
}

int route_prefix_new(Prefix **ret) {
        _cleanup_(prefix_freep) Prefix *prefix = NULL;

        prefix = new0(Prefix, 1);
        if (!prefix)
                return -ENOMEM;

        if (sd_radv_route_prefix_new(&prefix->radv_route_prefix) < 0)
                return -ENOMEM;

        *ret = TAKE_PTR(prefix);

        return 0;
}

void route_prefix_free(Prefix *prefix) {
        if (!prefix)
                return;

        if (prefix->network) {
                LIST_REMOVE(prefixes, prefix->network->static_route_prefixes, prefix);
                assert(prefix->network->n_static_route_prefixes > 0);
                prefix->network->n_static_route_prefixes--;

                if (prefix->section)
                        hashmap_remove(prefix->network->route_prefixes_by_section,
                                       prefix->section);
        }

        network_config_section_free(prefix->section);
        sd_radv_route_prefix_unref(prefix->radv_route_prefix);

        free(prefix);
}

static int route_prefix_new_static(Network *network, const char *filename,
                                   unsigned section_line, Prefix **ret) {
        _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
        _cleanup_(prefix_freep) Prefix *prefix = NULL;
        int r;

        assert(network);
        assert(ret);
        assert(!!filename == (section_line > 0));

        if (filename) {
                r = network_config_section_new(filename, section_line, &n);
                if (r < 0)
                        return r;

                if (section_line) {
                        prefix = hashmap_get(network->route_prefixes_by_section, n);
                        if (prefix) {
                                *ret = TAKE_PTR(prefix);

                                return 0;
                        }
                }
        }

        r = route_prefix_new(&prefix);
        if (r < 0)
                return r;

        prefix->network = network;
        LIST_APPEND(prefixes, network->static_route_prefixes, prefix);
        network->n_static_route_prefixes++;

        if (filename) {
                prefix->section = TAKE_PTR(n);

                r = hashmap_ensure_allocated(&network->route_prefixes_by_section, &network_config_hash_ops);
                if (r < 0)
                        return r;

                r = hashmap_put(network->route_prefixes_by_section, prefix->section, prefix);
                if (r < 0)
                        return r;
        }

        *ret = TAKE_PTR(prefix);

        return 0;
}

int config_parse_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) {

        Network *network = userdata;
        _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
        uint8_t prefixlen = 64;
        union in_addr_union in6addr;
        int r;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = prefix_new_static(network, filename, section_line, &p);
        if (r < 0)
                return r;

        r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue);
                return 0;
        }

        if (sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen) < 0)
                return -EADDRNOTAVAIL;

        log_syntax(unit, LOG_INFO, filename, line, r, "Found prefix %s", rvalue);

        p = NULL;

        return 0;
}

int config_parse_prefix_flags(const char *unit,
                              const char *filename,
                              unsigned line,
                              const char *section,
                              unsigned section_line,
                              const char *lvalue,
                              int ltype,
                              const char *rvalue,
                              void *data,
                              void *userdata) {
        Network *network = userdata;
        _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
        int r, val;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = prefix_new_static(network, filename, section_line, &p);
        if (r < 0)
                return r;

        r = parse_boolean(rvalue);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
                return 0;
        }

        val = r;

        if (streq(lvalue, "OnLink"))
                r = sd_radv_prefix_set_onlink(p->radv_prefix, val);
        else if (streq(lvalue, "AddressAutoconfiguration"))
                r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, val);
        if (r < 0)
                return r;

        p = NULL;

        return 0;
}

int config_parse_prefix_lifetime(const char *unit,
                                 const char *filename,
                                 unsigned line,
                                 const char *section,
                                 unsigned section_line,
                                 const char *lvalue,
                                 int ltype,
                                 const char *rvalue,
                                 void *data,
                                 void *userdata) {
        Network *network = userdata;
        _cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
        usec_t usec;
        int r;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = prefix_new_static(network, filename, section_line, &p);
        if (r < 0)
                return r;

        r = parse_sec(rvalue, &usec);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue);
                return 0;
        }

        /* a value of 0xffffffff represents infinity */
        if (streq(lvalue, "PreferredLifetimeSec"))
                r = sd_radv_prefix_set_preferred_lifetime(p->radv_prefix,
                                                          DIV_ROUND_UP(usec, USEC_PER_SEC));
        else if (streq(lvalue, "ValidLifetimeSec"))
                r = sd_radv_prefix_set_valid_lifetime(p->radv_prefix,
                                                      DIV_ROUND_UP(usec, USEC_PER_SEC));
        if (r < 0)
                return r;

        p = NULL;

        return 0;
}

int config_parse_route_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) {

        Network *network = userdata;
        _cleanup_(route_prefix_free_or_set_invalidp) Prefix *p = NULL;
        uint8_t prefixlen = 64;
        union in_addr_union in6addr;
        int r;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = route_prefix_new_static(network, filename, section_line, &p);
        if (r < 0)
                return r;

        r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r, "Route prefix is invalid, ignoring assignment: %s", rvalue);
                return 0;
        }

        if (sd_radv_prefix_set_route_prefix(p->radv_route_prefix, &in6addr.in6, prefixlen) < 0)
                return -EADDRNOTAVAIL;

        log_syntax(unit, LOG_INFO, filename, line, r, "Found route prefix %s", rvalue);

        p = NULL;

        return 0;
}

int config_parse_route_prefix_lifetime(const char *unit,
                                       const char *filename,
                                       unsigned line,
                                       const char *section,
                                       unsigned section_line,
                                       const char *lvalue,
                                       int ltype,
                                       const char *rvalue,
                                       void *data,
                                       void *userdata) {
        Network *network = userdata;
        _cleanup_(route_prefix_free_or_set_invalidp) Prefix *p = NULL;
        usec_t usec;
        int r;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = route_prefix_new_static(network, filename, section_line, &p);
        if (r < 0)
                return r;

        r = parse_sec(rvalue, &usec);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r,
                           "Route lifetime is invalid, ignoring assignment: %s", rvalue);
                return 0;
        }

        /* a value of 0xffffffff represents infinity */
        r = sd_radv_route_prefix_set_lifetime(p->radv_route_prefix, DIV_ROUND_UP(usec, USEC_PER_SEC));
        if (r < 0)
                return r;

        p = NULL;

        return 0;
}

static int radv_get_ip6dns(Network *network, struct in6_addr **dns,
                           size_t *n_dns) {
        _cleanup_free_ struct in6_addr *addresses = NULL;
        size_t i, n_addresses = 0, n_allocated = 0;

        assert(network);
        assert(dns);
        assert(n_dns);

        for (i = 0; i < network->n_dns; i++) {
                union in_addr_union *addr;

                if (network->dns[i].family != AF_INET6)
                        continue;

                addr = &network->dns[i].address;

                if (in_addr_is_null(AF_INET6, addr) ||
                    in_addr_is_link_local(AF_INET6, addr) ||
                    in_addr_is_localhost(AF_INET6, addr))
                        continue;

                if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
                        return -ENOMEM;

                addresses[n_addresses++] = addr->in6;
        }

        if (addresses) {
                *dns = TAKE_PTR(addresses);

                *n_dns = n_addresses;
        }

        return n_addresses;
}

static int radv_set_dns(Link *link, Link *uplink) {
        _cleanup_free_ struct in6_addr *dns = NULL;
        size_t n_dns;
        usec_t lifetime_usec;
        int r;

        if (!link->network->router_emit_dns)
                return 0;

        if (link->network->router_dns) {
                dns = newdup(struct in6_addr, link->network->router_dns,
                             link->network->n_router_dns);
                if (!dns)
                        return -ENOMEM;

                n_dns = link->network->n_router_dns;
                lifetime_usec = link->network->router_dns_lifetime_usec;

                goto set_dns;
        }

        lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;

        r = radv_get_ip6dns(link->network, &dns, &n_dns);
        if (r > 0)
                goto set_dns;

        if (uplink) {
                if (!uplink->network) {
                        log_link_debug(uplink, "Cannot fetch DNS servers as uplink interface is not managed by us");
                        return 0;
                }

                r = radv_get_ip6dns(uplink->network, &dns, &n_dns);
                if (r > 0)
                        goto set_dns;
        }

        return 0;

 set_dns:
        return sd_radv_set_rdnss(link->radv,
                                 DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
                                 dns, n_dns);
}

static int radv_set_domains(Link *link, Link *uplink) {
        OrderedSet *search_domains;
        usec_t lifetime_usec;
        _cleanup_free_ char **s = NULL; /* just free() because the strings are owned by the set */

        if (!link->network->router_emit_domains)
                return 0;

        search_domains = link->network->router_search_domains;
        lifetime_usec = link->network->router_dns_lifetime_usec;

        if (search_domains)
                goto set_domains;

        lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;

        search_domains = link->network->search_domains;
        if (search_domains)
                goto set_domains;

        if (uplink) {
                if (!uplink->network) {
                        log_link_debug(uplink, "Cannot fetch DNS search domains as uplink interface is not managed by us");
                        return 0;
                }

                search_domains = uplink->network->search_domains;
                if (search_domains)
                        goto set_domains;
        }

        return 0;

 set_domains:
        s = ordered_set_get_strv(search_domains);
        if (!s)
                return log_oom();

        return sd_radv_set_dnssl(link->radv,
                                 DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
                                 s);

}

int radv_emit_dns(Link *link) {
        Link *uplink;
        int r;

        uplink = manager_find_uplink(link->manager, link);

        r = radv_set_dns(link, uplink);
        if (r < 0)
                log_link_warning_errno(link, r, "Could not set RA DNS: %m");

        r = radv_set_domains(link, uplink);
        if (r < 0)
                log_link_warning_errno(link, r, "Could not set RA Domains: %m");

        return 0;
}

int radv_configure(Link *link) {
        int r;
        Prefix *p;

        assert(link);
        assert(link->network);

        r = sd_radv_new(&link->radv);
        if (r < 0)
                return r;

        r = sd_radv_attach_event(link->radv, NULL, 0);
        if (r < 0)
                return r;

        r = sd_radv_set_mac(link->radv, &link->mac);
        if (r < 0)
                return r;

        r = sd_radv_set_ifindex(link->radv, link->ifindex);
        if (r < 0)
                return r;

        r = sd_radv_set_managed_information(link->radv, link->network->router_managed);
        if (r < 0)
                return r;

        r = sd_radv_set_other_information(link->radv, link->network->router_other_information);
        if (r < 0)
                return r;

        /* a value of 0xffffffff represents infinity, 0x0 means this host is
           not a router */
        r = sd_radv_set_router_lifetime(link->radv,
                                        DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC));
        if (r < 0)
                return r;

        if (link->network->router_lifetime_usec > 0) {
                r = sd_radv_set_preference(link->radv,
                                           link->network->router_preference);
                if (r < 0)
                        return r;
        }

        if (IN_SET(link->network->router_prefix_delegation,
                   RADV_PREFIX_DELEGATION_STATIC,
                   RADV_PREFIX_DELEGATION_BOTH)) {

                LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
                        r = sd_radv_add_prefix(link->radv, p->radv_prefix, false);
                        if (r == -EEXIST)
                                continue;
                        if (r == -ENOEXEC) {
                                log_link_warning_errno(link, r, "[IPv6Prefix] section configured without Prefix= setting, ignoring section.");
                                continue;
                        }
                        if (r < 0)
                                return r;
                }

                LIST_FOREACH(prefixes, p, link->network->static_route_prefixes) {
                        r = sd_radv_add_route_prefix(link->radv, p->radv_route_prefix, false);
                        if (r == -EEXIST)
                                continue;
                        if (r < 0)
                                return r;
                }

        }

        return radv_emit_dns(link);
}

int config_parse_radv_dns(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        Network *n = data;
        const char *p = rvalue;
        int r;

        assert(filename);
        assert(lvalue);
        assert(rvalue);

        for (;;) {
                _cleanup_free_ char *w = NULL;
                union in_addr_union a;

                r = extract_first_word(&p, &w, NULL, 0);
                if (r == -ENOMEM)
                        return log_oom();
                if (r < 0) {
                        log_syntax(unit, LOG_ERR, filename, line, r,
                                   "Failed to extract word, ignoring: %s", rvalue);
                        return 0;
                }
                if (r == 0)
                        break;

                if (in_addr_from_string(AF_INET6, w, &a) >= 0) {
                        struct in6_addr *m;

                        m = reallocarray(n->router_dns, n->n_router_dns + 1, sizeof(struct in6_addr));
                        if (!m)
                                return log_oom();

                        m[n->n_router_dns++] = a.in6;
                        n->router_dns = m;

                } else
                        log_syntax(unit, LOG_ERR, filename, line, 0,
                                   "Failed to parse DNS server address, ignoring: %s", w);
        }

        return 0;
}

int config_parse_radv_search_domains(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        Network *n = data;
        const char *p = rvalue;
        int r;

        assert(filename);
        assert(lvalue);
        assert(rvalue);

        for (;;) {
                _cleanup_free_ char *w = NULL, *idna = NULL;

                r = extract_first_word(&p, &w, NULL, 0);
                if (r == -ENOMEM)
                        return log_oom();
                if (r < 0) {
                        log_syntax(unit, LOG_ERR, filename, line, r,
                                   "Failed to extract word, ignoring: %s", rvalue);
                        return 0;
                }
                if (r == 0)
                        break;

                r = dns_name_apply_idna(w, &idna);
                if (r < 0) {
                        log_syntax(unit, LOG_ERR, filename, line, r,
                                   "Failed to apply IDNA to domain name '%s', ignoring: %m", w);
                        continue;
                } else if (r == 0)
                        /* transfer ownership to simplify subsequent operations */
                        idna = TAKE_PTR(w);

                r = ordered_set_ensure_allocated(&n->router_search_domains, &string_hash_ops);
                if (r < 0)
                        return r;

                r = ordered_set_consume(n->router_search_domains, TAKE_PTR(idna));
                if (r < 0)
                        return r;
        }

        return 0;
}

static const char * const radv_prefix_delegation_table[_RADV_PREFIX_DELEGATION_MAX] = {
        [RADV_PREFIX_DELEGATION_NONE] = "no",
        [RADV_PREFIX_DELEGATION_STATIC] = "static",
        [RADV_PREFIX_DELEGATION_DHCP6] = "dhcpv6",
        [RADV_PREFIX_DELEGATION_BOTH] = "yes",
};

DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(
                radv_prefix_delegation,
                RADVPrefixDelegation,
                RADV_PREFIX_DELEGATION_BOTH);

int config_parse_router_prefix_delegation(
                const char *unit,
                const char *filename,
                unsigned line,
                const char *section,
                unsigned section_line,
                const char *lvalue,
                int ltype,
                const char *rvalue,
                void *data,
                void *userdata) {

        Network *network = userdata;
        RADVPrefixDelegation d;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        d = radv_prefix_delegation_from_string(rvalue);
        if (d < 0) {
                log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Invalid router prefix delegation '%s', ignoring assignment.", rvalue);
                return 0;
        }

        network->router_prefix_delegation = d;

        return 0;
}

int config_parse_router_preference(const char *unit,
                                   const char *filename,
                                   unsigned line,
                                   const char *section,
                                   unsigned section_line,
                                   const char *lvalue,
                                   int ltype,
                                   const char *rvalue,
                                   void *data,
                                   void *userdata) {
        Network *network = userdata;

        assert(filename);
        assert(section);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        if (streq(rvalue, "high"))
                network->router_preference = SD_NDISC_PREFERENCE_HIGH;
        else if (STR_IN_SET(rvalue, "medium", "normal", "default"))
                network->router_preference = SD_NDISC_PREFERENCE_MEDIUM;
        else if (streq(rvalue, "low"))
                network->router_preference = SD_NDISC_PREFERENCE_LOW;
        else
                log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue);

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
091214b6	2	/***
810adae9	3	Copyright © 2017 Intel Corporation. All rights reserved.
091214b6 PF	4	***/
	5
	6	#include <netinet/icmp6.h>
	7	#include <arpa/inet.h>
	8
ca5ad760	9	#include "dns-domain.h"
091214b6	10	#include "networkd-address.h"
c555a358	11	#include "networkd-manager.h"
091214b6	12	#include "networkd-radv.h"
6e849e95	13	#include "parse-util.h"
091214b6	14	#include "sd-radv.h"
6e849e95	15	#include "string-util.h"
6b1dec66	16	#include "string-table.h"
51517f9e	17	#include "strv.h"
6e849e95	18
6e849e95 PF	19	void prefix_free(Prefix *prefix) {
	20	if (!prefix)
	21	return;
	22
	23	if (prefix->network) {
	24	LIST_REMOVE(prefixes, prefix->network->static_prefixes, prefix);
	25	assert(prefix->network->n_static_prefixes > 0);
	26	prefix->network->n_static_prefixes--;
	27
ecee0abe	28	if (prefix->section)
6e849e95 PF	29	hashmap_remove(prefix->network->prefixes_by_section,
	30	prefix->section);
	31	}
	32
ecee0abe	33	network_config_section_free(prefix->section);
471e126b	34	sd_radv_prefix_unref(prefix->radv_prefix);
6e849e95 PF	35
	36	free(prefix);
	37	}
	38
	39	int prefix_new(Prefix **ret) {
15b8332e	40	_cleanup_(prefix_freep) Prefix *prefix = NULL;
6e849e95 PF	41
	42	prefix = new0(Prefix, 1);
	43	if (!prefix)
	44	return -ENOMEM;
	45
	46	if (sd_radv_prefix_new(&prefix->radv_prefix) < 0)
	47	return -ENOMEM;
	48
ae2a15bc	49	*ret = TAKE_PTR(prefix);
6e849e95 PF	50
	51	return 0;
	52	}
	53
9560e5b3 YW	54	static int prefix_new_static(Network network, const char filename,
9560e5b3 YW	55	unsigned section_line, Prefix **ret) {
8e766630 LP	56	_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
8e766630 LP	57	_cleanup_(prefix_freep) Prefix *prefix = NULL;
6e849e95 PF	58	int r;
	59
	60	assert(network);
	61	assert(ret);
	62	assert(!!filename == (section_line > 0));
	63
	64	if (filename) {
	65	r = network_config_section_new(filename, section_line, &n);
	66	if (r < 0)
	67	return r;
	68
	69	if (section_line) {
	70	prefix = hashmap_get(network->prefixes_by_section, n);
	71	if (prefix) {
1cc6c93a	72	*ret = TAKE_PTR(prefix);
6e849e95 PF	73
	74	return 0;
	75	}
	76	}
	77	}
	78
	79	r = prefix_new(&prefix);
	80	if (r < 0)
	81	return r;
	82
0f7f2769 YW	83	prefix->network = network;
	84	LIST_APPEND(prefixes, network->static_prefixes, prefix);
	85	network->n_static_prefixes++;
	86
6e849e95	87	if (filename) {
1cc6c93a	88	prefix->section = TAKE_PTR(n);
6e849e95	89
3e570042 YW	90	r = hashmap_ensure_allocated(&network->prefixes_by_section, &network_config_hash_ops);
	91	if (r < 0)
	92	return r;
	93
	94	r = hashmap_put(network->prefixes_by_section, prefix->section, prefix);
6e849e95 PF	95	if (r < 0)
	96	return r;
	97	}
	98
1cc6c93a	99	*ret = TAKE_PTR(prefix);
6e849e95 PF	100
	101	return 0;
	102	}
	103
203d4df5 SS	104	int route_prefix_new(Prefix **ret) {
	105	_cleanup_(prefix_freep) Prefix *prefix = NULL;
	106
	107	prefix = new0(Prefix, 1);
	108	if (!prefix)
	109	return -ENOMEM;
	110
	111	if (sd_radv_route_prefix_new(&prefix->radv_route_prefix) < 0)
	112	return -ENOMEM;
	113
	114	*ret = TAKE_PTR(prefix);
	115
	116	return 0;
	117	}
	118
	119	void route_prefix_free(Prefix *prefix) {
	120	if (!prefix)
	121	return;
	122
	123	if (prefix->network) {
	124	LIST_REMOVE(prefixes, prefix->network->static_route_prefixes, prefix);
	125	assert(prefix->network->n_static_route_prefixes > 0);
	126	prefix->network->n_static_route_prefixes--;
	127
	128	if (prefix->section)
	129	hashmap_remove(prefix->network->route_prefixes_by_section,
	130	prefix->section);
	131	}
	132
	133	network_config_section_free(prefix->section);
471e126b	134	sd_radv_route_prefix_unref(prefix->radv_route_prefix);
203d4df5 SS	135
	136	free(prefix);
	137	}
	138
	139	static int route_prefix_new_static(Network network, const char filename,
	140	unsigned section_line, Prefix **ret) {
	141	_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
	142	_cleanup_(prefix_freep) Prefix *prefix = NULL;
	143	int r;
	144
	145	assert(network);
	146	assert(ret);
	147	assert(!!filename == (section_line > 0));
	148
	149	if (filename) {
	150	r = network_config_section_new(filename, section_line, &n);
	151	if (r < 0)
	152	return r;
	153
	154	if (section_line) {
	155	prefix = hashmap_get(network->route_prefixes_by_section, n);
	156	if (prefix) {
	157	*ret = TAKE_PTR(prefix);
	158
	159	return 0;
	160	}
	161	}
	162	}
	163
	164	r = route_prefix_new(&prefix);
	165	if (r < 0)
	166	return r;
	167
	168	prefix->network = network;
	169	LIST_APPEND(prefixes, network->static_route_prefixes, prefix);
	170	network->n_static_route_prefixes++;
	171
	172	if (filename) {
	173	prefix->section = TAKE_PTR(n);
	174
	175	r = hashmap_ensure_allocated(&network->route_prefixes_by_section, &network_config_hash_ops);
	176	if (r < 0)
	177	return r;
	178
	179	r = hashmap_put(network->route_prefixes_by_section, prefix->section, prefix);
	180	if (r < 0)
	181	return r;
	182	}
	183
	184	*ret = TAKE_PTR(prefix);
	185
	186	return 0;
	187	}
	188
6e849e95	189	int config_parse_prefix(const char *unit,
203d4df5 SS	190	const char *filename,
	191	unsigned line,
	192	const char *section,
	193	unsigned section_line,
	194	const char *lvalue,
	195	int ltype,
	196	const char *rvalue,
	197	void *data,
	198	void *userdata) {
6e849e95 PF	199
6e849e95 PF	200	Network *network = userdata;
fcbf4cb7	201	_cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
6e849e95 PF	202	uint8_t prefixlen = 64;
	203	union in_addr_union in6addr;
	204	int r;
	205
	206	assert(filename);
	207	assert(section);
	208	assert(lvalue);
	209	assert(rvalue);
	210	assert(data);
	211
	212	r = prefix_new_static(network, filename, section_line, &p);
	213	if (r < 0)
	214	return r;
	215
	216	r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
	217	if (r < 0) {
	218	log_syntax(unit, LOG_ERR, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue);
	219	return 0;
	220	}
	221
	222	if (sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen) < 0)
	223	return -EADDRNOTAVAIL;
	224
	225	log_syntax(unit, LOG_INFO, filename, line, r, "Found prefix %s", rvalue);
	226
	227	p = NULL;
	228
	229	return 0;
	230	}
	231
	232	int config_parse_prefix_flags(const char *unit,
	233	const char *filename,
	234	unsigned line,
	235	const char *section,
	236	unsigned section_line,
	237	const char *lvalue,
	238	int ltype,
	239	const char *rvalue,
	240	void *data,
	241	void *userdata) {
	242	Network *network = userdata;
fcbf4cb7	243	_cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
6e849e95 PF	244	int r, val;
	245
	246	assert(filename);
	247	assert(section);
	248	assert(lvalue);
	249	assert(rvalue);
	250	assert(data);
	251
	252	r = prefix_new_static(network, filename, section_line, &p);
	253	if (r < 0)
	254	return r;
	255
	256	r = parse_boolean(rvalue);
	257	if (r < 0) {
	258	log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
	259	return 0;
	260	}
	261
	262	val = r;
	263
	264	if (streq(lvalue, "OnLink"))
	265	r = sd_radv_prefix_set_onlink(p->radv_prefix, val);
	266	else if (streq(lvalue, "AddressAutoconfiguration"))
	267	r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, val);
	268	if (r < 0)
	269	return r;
	270
	271	p = NULL;
	272
	273	return 0;
	274	}
	275
	276	int config_parse_prefix_lifetime(const char *unit,
	277	const char *filename,
	278	unsigned line,
	279	const char *section,
	280	unsigned section_line,
	281	const char *lvalue,
	282	int ltype,
	283	const char *rvalue,
	284	void *data,
	285	void *userdata) {
	286	Network *network = userdata;
fcbf4cb7	287	_cleanup_(prefix_free_or_set_invalidp) Prefix *p = NULL;
6e849e95 PF	288	usec_t usec;
	289	int r;
	290
	291	assert(filename);
	292	assert(section);
	293	assert(lvalue);
	294	assert(rvalue);
	295	assert(data);
	296
	297	r = prefix_new_static(network, filename, section_line, &p);
	298	if (r < 0)
	299	return r;
	300
	301	r = parse_sec(rvalue, &usec);
	302	if (r < 0) {
	303	log_syntax(unit, LOG_ERR, filename, line, r, "Lifetime is invalid, ignoring assignment: %s", rvalue);
	304	return 0;
	305	}
	306
	307	/* a value of 0xffffffff represents infinity */
	308	if (streq(lvalue, "PreferredLifetimeSec"))
	309	r = sd_radv_prefix_set_preferred_lifetime(p->radv_prefix,
	310	DIV_ROUND_UP(usec, USEC_PER_SEC));
	311	else if (streq(lvalue, "ValidLifetimeSec"))
	312	r = sd_radv_prefix_set_valid_lifetime(p->radv_prefix,
	313	DIV_ROUND_UP(usec, USEC_PER_SEC));
	314	if (r < 0)
	315	return r;
	316
	317	p = NULL;
	318
	319	return 0;
	320	}
091214b6	321
203d4df5 SS	322	int config_parse_route_prefix(const char *unit,
	323	const char *filename,
	324	unsigned line,
	325	const char *section,
	326	unsigned section_line,
	327	const char *lvalue,
	328	int ltype,
	329	const char *rvalue,
	330	void *data,
	331	void *userdata) {
	332
	333	Network *network = userdata;
e7825b23	334	_cleanup_(route_prefix_free_or_set_invalidp) Prefix *p = NULL;
203d4df5 SS	335	uint8_t prefixlen = 64;
	336	union in_addr_union in6addr;
	337	int r;
	338
	339	assert(filename);
	340	assert(section);
	341	assert(lvalue);
	342	assert(rvalue);
	343	assert(data);
	344
	345	r = route_prefix_new_static(network, filename, section_line, &p);
	346	if (r < 0)
	347	return r;
	348
	349	r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
	350	if (r < 0) {
	351	log_syntax(unit, LOG_ERR, filename, line, r, "Route prefix is invalid, ignoring assignment: %s", rvalue);
	352	return 0;
	353	}
	354
	355	if (sd_radv_prefix_set_route_prefix(p->radv_route_prefix, &in6addr.in6, prefixlen) < 0)
	356	return -EADDRNOTAVAIL;
	357
	358	log_syntax(unit, LOG_INFO, filename, line, r, "Found route prefix %s", rvalue);
	359
	360	p = NULL;
	361
	362	return 0;
	363	}
	364
	365	int config_parse_route_prefix_lifetime(const char *unit,
	366	const char *filename,
	367	unsigned line,
	368	const char *section,
	369	unsigned section_line,
	370	const char *lvalue,
	371	int ltype,
	372	const char *rvalue,
	373	void *data,
	374	void *userdata) {
	375	Network *network = userdata;
e7825b23	376	_cleanup_(route_prefix_free_or_set_invalidp) Prefix *p = NULL;
203d4df5 SS	377	usec_t usec;
	378	int r;
	379
	380	assert(filename);
	381	assert(section);
	382	assert(lvalue);
	383	assert(rvalue);
	384	assert(data);
	385
	386	r = route_prefix_new_static(network, filename, section_line, &p);
	387	if (r < 0)
	388	return r;
	389
	390	r = parse_sec(rvalue, &usec);
	391	if (r < 0) {
095b3a7d YW	392	log_syntax(unit, LOG_ERR, filename, line, r,
095b3a7d YW	393	"Route lifetime is invalid, ignoring assignment: %s", rvalue);
203d4df5 SS	394	return 0;
	395	}
	396
	397	/* a value of 0xffffffff represents infinity */
	398	r = sd_radv_route_prefix_set_lifetime(p->radv_route_prefix, DIV_ROUND_UP(usec, USEC_PER_SEC));
	399	if (r < 0)
	400	return r;
	401
	402	p = NULL;
	403
	404	return 0;
	405	}
	406
c555a358 PF	407	static int radv_get_ip6dns(Network network, struct in6_addr *dns,
	408	size_t *n_dns) {
	409	_cleanup_free_ struct in6_addr *addresses = NULL;
	410	size_t i, n_addresses = 0, n_allocated = 0;
	411
	412	assert(network);
	413	assert(dns);
	414	assert(n_dns);
	415
	416	for (i = 0; i < network->n_dns; i++) {
	417	union in_addr_union *addr;
	418
	419	if (network->dns[i].family != AF_INET6)
	420	continue;
	421
	422	addr = &network->dns[i].address;
	423
	424	if (in_addr_is_null(AF_INET6, addr) \|\|
	425	in_addr_is_link_local(AF_INET6, addr) \|\|
	426	in_addr_is_localhost(AF_INET6, addr))
	427	continue;
	428
	429	if (!GREEDY_REALLOC(addresses, n_allocated, n_addresses + 1))
	430	return -ENOMEM;
	431
	432	addresses[n_addresses++] = addr->in6;
	433	}
	434
	435	if (addresses) {
ae2a15bc	436	*dns = TAKE_PTR(addresses);
c555a358 PF	437
	438	*n_dns = n_addresses;
	439	}
	440
	441	return n_addresses;
	442	}
	443
	444	static int radv_set_dns(Link link, Link uplink) {
	445	_cleanup_free_ struct in6_addr *dns = NULL;
	446	size_t n_dns;
	447	usec_t lifetime_usec;
	448	int r;
	449
	450	if (!link->network->router_emit_dns)
	451	return 0;
	452
	453	if (link->network->router_dns) {
	454	dns = newdup(struct in6_addr, link->network->router_dns,
	455	link->network->n_router_dns);
4e361acc	456	if (!dns)
c555a358 PF	457	return -ENOMEM;
	458
	459	n_dns = link->network->n_router_dns;
	460	lifetime_usec = link->network->router_dns_lifetime_usec;
	461
	462	goto set_dns;
	463	}
	464
	465	lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;
	466
	467	r = radv_get_ip6dns(link->network, &dns, &n_dns);
	468	if (r > 0)
	469	goto set_dns;
	470
	471	if (uplink) {
4e361acc	472	if (!uplink->network) {
349a981d PF	473	log_link_debug(uplink, "Cannot fetch DNS servers as uplink interface is not managed by us");
	474	return 0;
	475	}
	476
c555a358 PF	477	r = radv_get_ip6dns(uplink->network, &dns, &n_dns);
	478	if (r > 0)
	479	goto set_dns;
	480	}
	481
	482	return 0;
	483
	484	set_dns:
	485	return sd_radv_set_rdnss(link->radv,
	486	DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
	487	dns, n_dns);
	488	}
	489
	490	static int radv_set_domains(Link link, Link uplink) {
5e2a51d5	491	OrderedSet *search_domains;
c555a358	492	usec_t lifetime_usec;
5e2a51d5	493	_cleanup_free_ char *s = NULL; / just free() because the strings are owned by the set */
c555a358 PF	494
	495	if (!link->network->router_emit_domains)
	496	return 0;
	497
	498	search_domains = link->network->router_search_domains;
	499	lifetime_usec = link->network->router_dns_lifetime_usec;
	500
	501	if (search_domains)
	502	goto set_domains;
	503
	504	lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;
	505
	506	search_domains = link->network->search_domains;
	507	if (search_domains)
	508	goto set_domains;
	509
	510	if (uplink) {
4e361acc	511	if (!uplink->network) {
349a981d PF	512	log_link_debug(uplink, "Cannot fetch DNS search domains as uplink interface is not managed by us");
	513	return 0;
	514	}
	515
c555a358 PF	516	search_domains = uplink->network->search_domains;
	517	if (search_domains)
	518	goto set_domains;
	519	}
	520
	521	return 0;
	522
	523	set_domains:
5e2a51d5 ZJS	524	s = ordered_set_get_strv(search_domains);
	525	if (!s)
	526	return log_oom();
	527
c555a358 PF	528	return sd_radv_set_dnssl(link->radv,
c555a358 PF	529	DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
5e2a51d5	530	s);
c555a358 PF	531
	532	}
	533
	534	int radv_emit_dns(Link *link) {
	535	Link *uplink;
	536	int r;
	537
	538	uplink = manager_find_uplink(link->manager, link);
	539
	540	r = radv_set_dns(link, uplink);
	541	if (r < 0)
	542	log_link_warning_errno(link, r, "Could not set RA DNS: %m");
	543
	544	r = radv_set_domains(link, uplink);
	545	if (r < 0)
	546	log_link_warning_errno(link, r, "Could not set RA Domains: %m");
	547
	548	return 0;
	549	}
	550
091214b6 PF	551	int radv_configure(Link *link) {
	552	int r;
	553	Prefix *p;
	554
	555	assert(link);
	556	assert(link->network);
	557
	558	r = sd_radv_new(&link->radv);
	559	if (r < 0)
	560	return r;
	561
	562	r = sd_radv_attach_event(link->radv, NULL, 0);
	563	if (r < 0)
	564	return r;
	565
	566	r = sd_radv_set_mac(link->radv, &link->mac);
	567	if (r < 0)
	568	return r;
	569
	570	r = sd_radv_set_ifindex(link->radv, link->ifindex);
	571	if (r < 0)
	572	return r;
	573
	574	r = sd_radv_set_managed_information(link->radv, link->network->router_managed);
	575	if (r < 0)
	576	return r;
	577
	578	r = sd_radv_set_other_information(link->radv, link->network->router_other_information);
	579	if (r < 0)
	580	return r;
	581
301a2fb9 PF	582	/* a value of 0xffffffff represents infinity, 0x0 means this host is
301a2fb9 PF	583	not a router */
091214b6	584	r = sd_radv_set_router_lifetime(link->radv,
945e3225	585	DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC));
091214b6 PF	586	if (r < 0)
	587	return r;
	588
	589	if (link->network->router_lifetime_usec > 0) {
	590	r = sd_radv_set_preference(link->radv,
	591	link->network->router_preference);
	592	if (r < 0)
	593	return r;
	594	}
	595
56a23cb4 PF	596	if (IN_SET(link->network->router_prefix_delegation,
	597	RADV_PREFIX_DELEGATION_STATIC,
	598	RADV_PREFIX_DELEGATION_BOTH)) {
59ea6e57	599
56a23cb4	600	LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
d601b566	601	r = sd_radv_add_prefix(link->radv, p->radv_prefix, false);
59ea6e57 LP	602	if (r == -EEXIST)
	603	continue;
	604	if (r == -ENOEXEC) {
	605	log_link_warning_errno(link, r, "[IPv6Prefix] section configured without Prefix= setting, ignoring section.");
	606	continue;
	607	}
	608	if (r < 0)
56a23cb4 PF	609	return r;
56a23cb4 PF	610	}
203d4df5 SS	611
	612	LIST_FOREACH(prefixes, p, link->network->static_route_prefixes) {
	613	r = sd_radv_add_route_prefix(link->radv, p->radv_route_prefix, false);
	614	if (r == -EEXIST)
	615	continue;
	616	if (r < 0)
	617	return r;
	618	}
	619
091214b6 PF	620	}
091214b6 PF	621
c555a358	622	return radv_emit_dns(link);
091214b6	623	}
ca5ad760 YW	624
	625	int config_parse_radv_dns(
	626	const char *unit,
	627	const char *filename,
	628	unsigned line,
	629	const char *section,
	630	unsigned section_line,
	631	const char *lvalue,
	632	int ltype,
	633	const char *rvalue,
	634	void *data,
	635	void *userdata) {
	636
	637	Network *n = data;
	638	const char *p = rvalue;
	639	int r;
	640
	641	assert(filename);
	642	assert(lvalue);
	643	assert(rvalue);
	644
	645	for (;;) {
	646	_cleanup_free_ char *w = NULL;
	647	union in_addr_union a;
	648
	649	r = extract_first_word(&p, &w, NULL, 0);
	650	if (r == -ENOMEM)
	651	return log_oom();
	652	if (r < 0) {
	653	log_syntax(unit, LOG_ERR, filename, line, r,
	654	"Failed to extract word, ignoring: %s", rvalue);
	655	return 0;
	656	}
	657	if (r == 0)
	658	break;
	659
	660	if (in_addr_from_string(AF_INET6, w, &a) >= 0) {
	661	struct in6_addr *m;
	662
	663	m = reallocarray(n->router_dns, n->n_router_dns + 1, sizeof(struct in6_addr));
	664	if (!m)
	665	return log_oom();
	666
	667	m[n->n_router_dns++] = a.in6;
	668	n->router_dns = m;
	669
	670	} else
	671	log_syntax(unit, LOG_ERR, filename, line, 0,
	672	"Failed to parse DNS server address, ignoring: %s", w);
	673	}
	674
	675	return 0;
	676	}
	677
	678	int config_parse_radv_search_domains(
	679	const char *unit,
	680	const char *filename,
	681	unsigned line,
	682	const char *section,
	683	unsigned section_line,
	684	const char *lvalue,
	685	int ltype,
	686	const char *rvalue,
	687	void *data,
688	void *userdata) {
689
690	Network *n = data;
691	const char *p = rvalue;
692	int r;
693
694	assert(filename);
695	assert(lvalue);
696	assert(rvalue);
697
698	for (;;) {
699	_cleanup_free_ char w = NULL, idna = NULL;
700
701	r = extract_first_word(&p, &w, NULL, 0);
702	if (r == -ENOMEM)
703	return log_oom();
704	if (r < 0) {
705	log_syntax(unit, LOG_ERR, filename, line, r,
706	"Failed to extract word, ignoring: %s", rvalue);
707	return 0;
708	}
709	if (r == 0)
710	break;
711
712	r = dns_name_apply_idna(w, &idna);
713	if (r < 0) {
714	log_syntax(unit, LOG_ERR, filename, line, r,
715	"Failed to apply IDNA to domain name '%s', ignoring: %m", w);
716	continue;
717	} else if (r == 0)
718	/* transfer ownership to simplify subsequent operations */
719	idna = TAKE_PTR(w);
720
721	r = ordered_set_ensure_allocated(&n->router_search_domains, &string_hash_ops);
722	if (r < 0)
723	return r;
724
725	r = ordered_set_consume(n->router_search_domains, TAKE_PTR(idna));
726	if (r < 0)
727	return r;
728	}
729
730	return 0;
731	}
732
733	static const char * const radv_prefix_delegation_table[_RADV_PREFIX_DELEGATION_MAX] = {
734	[RADV_PREFIX_DELEGATION_NONE] = "no",
735	[RADV_PREFIX_DELEGATION_STATIC] = "static",
736	[RADV_PREFIX_DELEGATION_DHCP6] = "dhcpv6",
737	[RADV_PREFIX_DELEGATION_BOTH] = "yes",
738	};
739
740	DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(
741	radv_prefix_delegation,
742	RADVPrefixDelegation,
743	RADV_PREFIX_DELEGATION_BOTH);
744
745	int config_parse_router_prefix_delegation(
746	const char *unit,
747	const char *filename,
748	unsigned line,
749	const char *section,
750	unsigned section_line,
751	const char *lvalue,
752	int ltype,
753	const char *rvalue,
754	void *data,
755	void *userdata) {
756
757	Network *network = userdata;
758	RADVPrefixDelegation d;
759
760	assert(filename);
761	assert(section);
762	assert(lvalue);
763	assert(rvalue);
764	assert(data);
765
766	d = radv_prefix_delegation_from_string(rvalue);
767	if (d < 0) {
768	log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Invalid router prefix delegation '%s', ignoring assignment.", rvalue);
769	return 0;
770	}
771
772	network->router_prefix_delegation = d;
773
774	return 0;
775	}
776
777	int config_parse_router_preference(const char *unit,
778	const char *filename,
779	unsigned line,
780	const char *section,
781	unsigned section_line,
782	const char *lvalue,
783	int ltype,
784	const char *rvalue,
785	void *data,
786	void *userdata) {
787	Network *network = userdata;
788
789	assert(filename);
790	assert(section);
791	assert(lvalue);
792	assert(rvalue);
793	assert(data);
794
795	if (streq(rvalue, "high"))
796	network->router_preference = SD_NDISC_PREFERENCE_HIGH;
797	else if (STR_IN_SET(rvalue, "medium", "normal", "default"))
798	network->router_preference = SD_NDISC_PREFERENCE_MEDIUM;
799	else if (streq(rvalue, "low"))
800	network->router_preference = SD_NDISC_PREFERENCE_LOW;
801	else
802	log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router preference '%s' is invalid, ignoring assignment: %m", rvalue);
803
804	return 0;
805	}