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-rw-r--r--src/network/networkd-radv.c999
1 files changed, 999 insertions, 0 deletions
diff --git a/src/network/networkd-radv.c b/src/network/networkd-radv.c
new file mode 100644
index 0000000..a8e1b2b
--- /dev/null
+++ b/src/network/networkd-radv.c
@@ -0,0 +1,999 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ Copyright © 2017 Intel Corporation. All rights reserved.
+***/
+
+#include <netinet/icmp6.h>
+#include <arpa/inet.h>
+
+#include "dns-domain.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "networkd-network.h"
+#include "networkd-radv.h"
+#include "parse-util.h"
+#include "string-util.h"
+#include "string-table.h"
+#include "strv.h"
+
+Prefix *prefix_free(Prefix *prefix) {
+ if (!prefix)
+ return NULL;
+
+ if (prefix->network) {
+ assert(prefix->section);
+ hashmap_remove(prefix->network->prefixes_by_section, prefix->section);
+ }
+
+ network_config_section_free(prefix->section);
+ sd_radv_prefix_unref(prefix->radv_prefix);
+
+ return mfree(prefix);
+}
+
+DEFINE_NETWORK_SECTION_FUNCTIONS(Prefix, prefix_free);
+
+static 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);
+ assert(section_line > 0);
+
+ r = network_config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ 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;
+ 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;
+}
+
+RoutePrefix *route_prefix_free(RoutePrefix *prefix) {
+ if (!prefix)
+ return NULL;
+
+ if (prefix->network) {
+ assert(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);
+
+ return mfree(prefix);
+}
+
+DEFINE_NETWORK_SECTION_FUNCTIONS(RoutePrefix, route_prefix_free);
+
+static int route_prefix_new(RoutePrefix **ret) {
+ _cleanup_(route_prefix_freep) RoutePrefix *prefix = NULL;
+
+ prefix = new0(RoutePrefix, 1);
+ if (!prefix)
+ return -ENOMEM;
+
+ if (sd_radv_route_prefix_new(&prefix->radv_route_prefix) < 0)
+ return -ENOMEM;
+
+ *ret = TAKE_PTR(prefix);
+
+ return 0;
+}
+
+static int route_prefix_new_static(Network *network, const char *filename, unsigned section_line, RoutePrefix **ret) {
+ _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
+ _cleanup_(route_prefix_freep) RoutePrefix *prefix = NULL;
+ int r;
+
+ assert(network);
+ assert(ret);
+ assert(filename);
+ assert(section_line > 0);
+
+ r = network_config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ 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;
+ 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;
+}
+
+void network_drop_invalid_prefixes(Network *network) {
+ Prefix *prefix;
+
+ assert(network);
+
+ HASHMAP_FOREACH(prefix, network->prefixes_by_section)
+ if (section_is_invalid(prefix->section))
+ prefix_free(prefix);
+}
+
+void network_drop_invalid_route_prefixes(Network *network) {
+ RoutePrefix *prefix;
+
+ assert(network);
+
+ HASHMAP_FOREACH(prefix, network->route_prefixes_by_section)
+ if (section_is_invalid(prefix->section))
+ route_prefix_free(prefix);
+}
+
+void network_adjust_radv(Network *network) {
+ assert(network);
+
+ /* After this function is called, network->router_prefix_delegation can be treated as a boolean. */
+
+ if (network->dhcp6_pd < 0)
+ /* For backward compatibility. */
+ network->dhcp6_pd = FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_DHCP6);
+
+ if (!FLAGS_SET(network->link_local, ADDRESS_FAMILY_IPV6)) {
+ if (network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE)
+ log_warning("%s: IPv6PrefixDelegation= is enabled but IPv6 link local addressing is disabled. "
+ "Disabling IPv6PrefixDelegation=.", network->filename);
+
+ network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE;
+ }
+
+ if (network->router_prefix_delegation == RADV_PREFIX_DELEGATION_NONE) {
+ network->n_router_dns = 0;
+ network->router_dns = mfree(network->router_dns);
+ network->router_search_domains = ordered_set_free(network->router_search_domains);
+ }
+
+ if (!FLAGS_SET(network->router_prefix_delegation, RADV_PREFIX_DELEGATION_STATIC)) {
+ network->prefixes_by_section = hashmap_free_with_destructor(network->prefixes_by_section, prefix_free);
+ network->route_prefixes_by_section = hashmap_free_with_destructor(network->route_prefixes_by_section, route_prefix_free);
+ }
+}
+
+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 log_oom();
+
+ r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Prefix is invalid, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ r = sd_radv_prefix_set_prefix(p->radv_prefix, &in6addr.in6, prefixlen);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set radv prefix, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ 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;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = prefix_new_static(network, filename, section_line, &p);
+ if (r < 0)
+ return log_oom();
+
+ r = parse_boolean(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ if (streq(lvalue, "OnLink"))
+ r = sd_radv_prefix_set_onlink(p->radv_prefix, r);
+ else if (streq(lvalue, "AddressAutoconfiguration"))
+ r = sd_radv_prefix_set_address_autoconfiguration(p->radv_prefix, r);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set %s=, ignoring assignment: %m", lvalue);
+ return 0;
+ }
+
+ 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 log_oom();
+
+ r = parse_sec(rvalue, &usec);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, 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) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set %s=, ignoring assignment: %m", lvalue);
+ return 0;
+ }
+
+ p = NULL;
+
+ return 0;
+}
+
+int config_parse_prefix_assign(
+ 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;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = prefix_new_static(network, filename, section_line, &p);
+ if (r < 0)
+ return log_oom();
+
+ r = parse_boolean(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse %s=, ignoring assignment: %s",
+ lvalue, rvalue);
+ return 0;
+ }
+
+ p->assign = 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) RoutePrefix *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 log_oom();
+
+ r = in_addr_prefix_from_string(rvalue, AF_INET6, &in6addr, &prefixlen);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Route prefix is invalid, ignoring assignment: %s", rvalue);
+ return 0;
+ }
+
+ r = sd_radv_prefix_set_route_prefix(p->radv_route_prefix, &in6addr.in6, prefixlen);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to set route prefix, ignoring assignment: %m");
+ return 0;
+ }
+
+ 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) RoutePrefix *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 log_oom();
+
+ r = parse_sec(rvalue, &usec);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, 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) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to set route lifetime, ignoring assignment: %m");
+ return 0;
+ }
+
+ p = NULL;
+
+ return 0;
+}
+
+static int network_get_ipv6_dns(Network *network, struct in6_addr **ret_addresses, size_t *ret_size) {
+ _cleanup_free_ struct in6_addr *addresses = NULL;
+ size_t n_addresses = 0, n_allocated = 0;
+
+ assert(network);
+ assert(ret_addresses);
+ assert(ret_size);
+
+ for (size_t 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;
+ }
+
+ *ret_addresses = TAKE_PTR(addresses);
+ *ret_size = n_addresses;
+
+ return n_addresses;
+}
+
+static int radv_set_dns(Link *link, Link *uplink) {
+ _cleanup_free_ struct in6_addr *dns = NULL;
+ usec_t lifetime_usec;
+ size_t n_dns;
+ int r;
+
+ if (!link->network->router_emit_dns)
+ return 0;
+
+ if (link->network->router_dns) {
+ struct in6_addr *p;
+
+ dns = new(struct in6_addr, link->network->n_router_dns);
+ if (!dns)
+ return -ENOMEM;
+
+ p = dns;
+ for (size_t i = 0; i < link->network->n_router_dns; i++)
+ if (IN6_IS_ADDR_UNSPECIFIED(&link->network->router_dns[i])) {
+ if (!IN6_IS_ADDR_UNSPECIFIED(&link->ipv6ll_address))
+ *(p++) = link->ipv6ll_address;
+ } else
+ *(p++) = link->network->router_dns[i];
+
+ n_dns = p - dns;
+ lifetime_usec = link->network->router_dns_lifetime_usec;
+
+ goto set_dns;
+ }
+
+ lifetime_usec = SD_RADV_DEFAULT_DNS_LIFETIME_USEC;
+
+ r = network_get_ipv6_dns(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 = network_get_ipv6_dns(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;
+}
+
+static bool link_radv_enabled(Link *link) {
+ assert(link);
+
+ if (!link_ipv6ll_enabled(link))
+ return false;
+
+ return link->network->router_prefix_delegation;
+}
+
+int radv_configure(Link *link) {
+ uint16_t router_lifetime;
+ RoutePrefix *q;
+ Prefix *p;
+ int r;
+
+ assert(link);
+ assert(link->network);
+
+ if (!link_radv_enabled(link))
+ return 0;
+
+ r = sd_radv_new(&link->radv);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_attach_event(link->radv, link->manager->event, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_set_mac(link->radv, &link->hw_addr.addr.ether);
+ 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 UINT16_MAX represents infinity, 0x0 means this host is not a router */
+ if (link->network->router_lifetime_usec == USEC_INFINITY)
+ router_lifetime = UINT16_MAX;
+ else if (link->network->router_lifetime_usec > (UINT16_MAX - 1) * USEC_PER_SEC)
+ router_lifetime = UINT16_MAX - 1;
+ else
+ router_lifetime = DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC);
+
+ r = sd_radv_set_router_lifetime(link->radv, router_lifetime);
+ if (r < 0)
+ return r;
+
+ if (router_lifetime > 0) {
+ r = sd_radv_set_preference(link->radv, link->network->router_preference);
+ if (r < 0)
+ return r;
+ }
+
+ HASHMAP_FOREACH(p, link->network->prefixes_by_section) {
+ 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;
+ }
+
+ HASHMAP_FOREACH(q, link->network->route_prefixes_by_section) {
+ r = sd_radv_add_route_prefix(link->radv, q->radv_route_prefix, false);
+ if (r == -EEXIST)
+ continue;
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int radv_update_mac(Link *link) {
+ bool restart;
+ int r;
+
+ assert(link);
+
+ if (!link->radv)
+ return 0;
+
+ restart = sd_radv_is_running(link->radv);
+
+ r = sd_radv_stop(link->radv);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_set_mac(link->radv, &link->hw_addr.addr.ether);
+ if (r < 0)
+ return r;
+
+ if (restart) {
+ r = sd_radv_start(link->radv);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int radv_add_prefix(
+ Link *link,
+ const struct in6_addr *prefix,
+ uint8_t prefix_len,
+ uint32_t lifetime_preferred,
+ uint32_t lifetime_valid) {
+
+ _cleanup_(sd_radv_prefix_unrefp) sd_radv_prefix *p = NULL;
+ int r;
+
+ assert(link);
+
+ if (!link->radv)
+ return 0;
+
+ r = sd_radv_prefix_new(&p);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_prefix_set_prefix(p, prefix, prefix_len);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_prefix_set_preferred_lifetime(p, lifetime_preferred);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_prefix_set_valid_lifetime(p, lifetime_valid);
+ if (r < 0)
+ return r;
+
+ r = sd_radv_add_prefix(link->radv, p, true);
+ if (r < 0 && r != -EEXIST)
+ return r;
+
+ return 0;
+}
+
+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;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ if (isempty(rvalue)) {
+ n->n_router_dns = 0;
+ n->router_dns = mfree(n->router_dns);
+ return 0;
+ }
+
+ for (const char *p = rvalue;;) {
+ _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_WARNING, filename, line, r,
+ "Failed to extract word, ignoring: %s", rvalue);
+ return 0;
+ }
+ if (r == 0)
+ return 0;
+
+ if (streq(w, "_link_local"))
+ a = IN_ADDR_NULL;
+ else {
+ r = in_addr_from_string(AF_INET6, w, &a);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse DNS server address, ignoring: %s", w);
+ continue;
+ }
+
+ if (in_addr_is_null(AF_INET6, &a)) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "DNS server address is null, ignoring: %s", w);
+ continue;
+ }
+ }
+
+ 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;
+ }
+}
+
+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;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ if (isempty(rvalue)) {
+ n->router_search_domains = ordered_set_free(n->router_search_domains);
+ return 0;
+ }
+
+ for (const char *p = rvalue;;) {
+ _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_WARNING, filename, line, r,
+ "Failed to extract word, ignoring: %s", rvalue);
+ return 0;
+ }
+ if (r == 0)
+ return 0;
+
+ r = dns_name_apply_idna(w, &idna);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, 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_free);
+ if (r < 0)
+ return log_oom();
+
+ r = ordered_set_consume(n->router_search_domains, TAKE_PTR(idna));
+ if (r < 0)
+ return log_oom();
+ }
+}
+
+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) {
+
+ RADVPrefixDelegation val, *ra = data;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (streq(lvalue, "IPv6SendRA")) {
+ r = parse_boolean(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ /* When IPv6SendRA= is enabled, only static prefixes are sent by default, and users
+ * need to explicitly enable DHCPv6PrefixDelegation=. */
+ *ra = r ? RADV_PREFIX_DELEGATION_STATIC : RADV_PREFIX_DELEGATION_NONE;
+ return 0;
+ }
+
+ /* For backward compatibility */
+ val = radv_prefix_delegation_from_string(rvalue);
+ if (val < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "Invalid %s= setting, ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ *ra = val;
+ 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_WARNING, filename, line, 0,
+ "Invalid router preference, ignoring assignment: %s", rvalue);
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 05:50:07 +0000