+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
#include <arpa/inet.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"
+
+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;
+ int d;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ if (streq(rvalue, "static"))
+ network->router_prefix_delegation = RADV_PREFIX_DELEGATION_STATIC;
+ else if (streq(rvalue, "dhcpv6"))
+ network->router_prefix_delegation = RADV_PREFIX_DELEGATION_DHCP6;
+ else {
+ d = parse_boolean(rvalue);
+ if (d > 0)
+ network->router_prefix_delegation = RADV_PREFIX_DELEGATION_BOTH;
+ else
+ network->router_prefix_delegation = RADV_PREFIX_DELEGATION_NONE;
+
+ if (d < 0)
+ log_syntax(unit, LOG_ERR, filename, line, -EINVAL, "Router prefix delegation '%s' is invalid, ignoring assignment: %m", rvalue);
+ }
+
+ 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;
+}
+
+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);
+ }
+
+ prefix->radv_prefix = sd_radv_prefix_unref(prefix->radv_prefix);
+
+ free(prefix);
+}
+
+int prefix_new(Prefix **ret) {
+ 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;
+}
+
+int prefix_new_static(Network *network, const char *filename,
+ unsigned section_line, Prefix **ret) {
+ _cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
+ _cleanup_prefix_free_ 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;
+
+ if (filename) {
+ prefix->section = TAKE_PTR(n);
+
+ r = hashmap_put(network->prefixes_by_section, prefix->section,
+ prefix);
+ if (r < 0)
+ return r;
+ }
+
+ prefix->network = network;
+ LIST_APPEND(prefixes, network->static_prefixes, prefix);
+ network->n_static_prefixes++;
+
+ *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_ 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_ 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_ 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;
+}
+
+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 == NULL)
+ 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 == NULL) {
+ 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) {
+ char **search_domains;
+ usec_t lifetime_usec;
+
+ 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 == NULL) {
+ 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:
+ return sd_radv_set_dnssl(link->radv,
+ DIV_ROUND_UP(lifetime_usec, USEC_PER_SEC),
+ search_domains);
+
+}
+
+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;
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,
- link->network->router_lifetime_usec);
+ DIV_ROUND_UP(link->network->router_lifetime_usec, USEC_PER_SEC));
if (r < 0)
return r;
return r;
}
- LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
- r = sd_radv_add_prefix(link->radv, p->radv_prefix);
- if (r != -EEXIST && 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 && r < 0)
+ return r;
+ }
}
- return 0;
+ return radv_emit_dns(link);
}
projects / thirdparty / systemd.git / blobdiff