Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 512 insertions, 0 deletions

diff --git a/src/network/networkd-radv.c b/src/network/networkd-radv.c
new file mode 100644
index 0000000..92cead0
--- /dev/null
+++ b/src/network/networkd-radv.c
@@ -0,0 +1,512 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+/***
+  Copyright © 2017 Intel Corporation. All rights reserved.
+***/
+
+#include <netinet/icmp6.h>
+#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"
+#include "string-table.h"
+#include "strv.h"
+
+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;
+}
+
+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);
+        prefix->radv_prefix = 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;
+}
+
+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 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_freep) 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_freep) 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_freep) 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;
+        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;
+                }
+        }
+
+        return radv_emit_dns(link);
+}