#include "alloc-util.h"

#include "bus-util.h"

#include "parse-util.h"

#include "resolve-util.h"

#include "resolved-bus.h"

#include "resolved-link-bus.h"

#include "strv.h"

static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_resolve_support, resolve_support, ResolveSupport);

static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_dnssec_mode, dnssec_mode, DnssecMode);

static int property_get_dns(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Link *l = userdata;

DnsServer *s;

int r;

assert(reply);

assert(l);

r = sd_bus_message_open_container(reply, 'a', "(iay)");

if (r < 0)

return r;

LIST_FOREACH(servers, s, l->dns_servers) {

r = bus_dns_server_append(reply, s, false);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

static int property_get_domains(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Link *l = userdata;

DnsSearchDomain *d;

int r;

assert(reply);

assert(l);

r = sd_bus_message_open_container(reply, 'a', "s");

if (r < 0)

return r;

LIST_FOREACH(domains, d, l->search_domains) {

r = sd_bus_message_append(reply, "s", d->name);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

static int property_get_scopes_mask(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Link *l = userdata;

uint64_t mask;

assert(reply);

assert(l);

mask = (l->unicast_scope ? SD_RESOLVED_DNS : 0) |

(l->llmnr_ipv4_scope ? SD_RESOLVED_LLMNR_IPV4 : 0) |

(l->llmnr_ipv6_scope ? SD_RESOLVED_LLMNR_IPV6 : 0) |

(l->mdns_ipv4_scope ? SD_RESOLVED_MDNS_IPV4 : 0) |

(l->mdns_ipv6_scope ? SD_RESOLVED_MDNS_IPV6 : 0);

return sd_bus_message_append(reply, "t", mask);

}

static int property_get_ntas(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Link *l = userdata;

const char *name;

Iterator i;

int r;

assert(reply);

assert(l);

r = sd_bus_message_open_container(reply, 'a', "s");

if (r < 0)

return r;

SET_FOREACH(name, l->dnssec_negative_trust_anchors, i) {

r = sd_bus_message_append(reply, "s", name);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

int bus_link_method_set_dns_servers(sd_bus_message *message, void *userdata, sd_bus_error *error) {

_cleanup_free_ struct in_addr_data *dns = NULL;

size_t allocated = 0, n = 0;

Link *l = userdata;

unsigned i;

int r;

assert(message);

assert(l);

r = sd_bus_message_enter_container(message, 'a', "(iay)");

if (r < 0)

return r;

for (;;) {

int family;

size_t sz;

const void *d;

assert_cc(sizeof(int) == sizeof(int32_t));

r = sd_bus_message_enter_container(message, 'r', "iay");

if (r < 0)

return r;

if (r == 0)

break;

r = sd_bus_message_read(message, "i", &family);

if (r < 0)

return r;

if (!IN_SET(family, AF_INET, AF_INET6))

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown address family %i", family);

r = sd_bus_message_read_array(message, 'y', &d, &sz);

if (r < 0)

return r;

if (sz != FAMILY_ADDRESS_SIZE(family))

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid address size");

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

if (!GREEDY_REALLOC(dns, allocated, n+1))

return -ENOMEM;

dns[n].family = family;

memcpy(&dns[n].address, d, sz);

n++;

}

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

dns_server_mark_all(l->dns_servers);

for (i = 0; i < n; i++) {

DnsServer *s;

s = dns_server_find(l->dns_servers, dns[i].family, &dns[i].address);

if (s)

dns_server_move_back_and_unmark(s);

else {

r = dns_server_new(l->manager, NULL, DNS_SERVER_LINK, l, dns[i].family, &dns[i].address);

if (r < 0)

goto clear;

}

}

dns_server_unlink_marked(l->dns_servers);

link_allocate_scopes(l);

return sd_bus_reply_method_return(message, NULL);

clear:

dns_server_unlink_all(l->dns_servers);

return r;

}

int bus_link_method_set_search_domains(sd_bus_message *message, void *userdata, sd_bus_error *error) {

_cleanup_free_ char **domains = NULL;

Link *l = userdata;

char **i;

int r;

assert(message);

assert(l);

r = sd_bus_message_read_strv(message, &domains);

if (r < 0)

return r;

STRV_FOREACH(i, domains) {

r = dns_name_is_valid(*i);

if (r < 0)

return r;

if (r == 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search domain %s", *i);

if (dns_name_is_root(*i))

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Root domain is not suitable as search domain");

}

dns_search_domain_mark_all(l->search_domains);

STRV_FOREACH(i, domains) {

DnsSearchDomain *d;

r = dns_search_domain_find(l->search_domains, *i, &d);

if (r < 0)

goto clear;

if (r > 0)

dns_search_domain_move_back_and_unmark(d);

else {

r = dns_search_domain_new(l->manager, NULL, DNS_SEARCH_DOMAIN_LINK, l, *i);

if (r < 0)

goto clear;

}

}

dns_search_domain_unlink_marked(l->search_domains);

return sd_bus_reply_method_return(message, NULL);

clear:

dns_search_domain_unlink_all(l->search_domains);

return r;

}

int bus_link_method_set_llmnr(sd_bus_message *message, void *userdata, sd_bus_error *error) {

Link *l = userdata;

ResolveSupport mode;

const char *llmnr;

int r;

assert(message);

assert(l);

r = sd_bus_message_read(message, "s", &llmnr);

if (r < 0)

return r;

if (isempty(llmnr))

mode = RESOLVE_SUPPORT_YES;

else {

mode = resolve_support_from_string(llmnr);

if (mode < 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid LLMNR setting: %s", llmnr);

}

l->llmnr_support = mode;

link_allocate_scopes(l);

link_add_rrs(l, false);

return sd_bus_reply_method_return(message, NULL);

}

int bus_link_method_set_mdns(sd_bus_message *message, void *userdata, sd_bus_error *error) {

Link *l = userdata;

ResolveSupport mode;

const char *mdns;

int r;

assert(message);

assert(l);

r = sd_bus_message_read(message, "s", &mdns);

if (r < 0)

return r;

if (isempty(mdns))

mode = RESOLVE_SUPPORT_NO;

else {

mode = resolve_support_from_string(mdns);

if (mode < 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid MulticastDNS setting: %s", mdns);

}

l->mdns_support = mode;

link_allocate_scopes(l);

link_add_rrs(l, false);

return sd_bus_reply_method_return(message, NULL);

}

int bus_link_method_set_dnssec(sd_bus_message *message, void *userdata, sd_bus_error *error) {

Link *l = userdata;

const char *dnssec;

DnssecMode mode;

int r;

assert(message);

assert(l);

r = sd_bus_message_read(message, "s", &dnssec);

if (r < 0)

return r;

if (isempty(dnssec))

mode = _DNSSEC_MODE_INVALID;

else {

mode = dnssec_mode_from_string(dnssec);

if (mode < 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid DNSSEC setting: %s", dnssec);

}

link_set_dnssec_mode(l, mode);

return sd_bus_reply_method_return(message, NULL);

}

int bus_link_method_set_dnssec_negative_trust_anchors(sd_bus_message *message, void *userdata, sd_bus_error *error) {

_cleanup_set_free_free_ Set *ns = NULL;

_cleanup_free_ char **ntas = NULL;

Link *l = userdata;

int r;

char **i;

assert(message);

assert(l);

r = sd_bus_message_read_strv(message, &ntas);

if (r < 0)

return r;

STRV_FOREACH(i, ntas) {

r = dns_name_is_valid(*i);

if (r < 0)

return r;

if (r == 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid search negative trust anchor domain: %s", *i);

}

ns = set_new(&dns_name_hash_ops);

if (!ns)

return -ENOMEM;

STRV_FOREACH(i, ntas) {

r = set_put_strdup(ns, *i);

if (r < 0)

return r;

}

set_free_free(l->dnssec_negative_trust_anchors);

l->dnssec_negative_trust_anchors = ns;

ns = NULL;

return sd_bus_reply_method_return(message, NULL);

}

int bus_link_method_revert(sd_bus_message *message, void *userdata, sd_bus_error *error) {

Link *l = userdata;

assert(message);

assert(l);

link_flush_settings(l);

link_allocate_scopes(l);

link_add_rrs(l, false);

return sd_bus_reply_method_return(message, NULL);

}

const sd_bus_vtable link_vtable[] = {

SD_BUS_VTABLE_START(0),

SD_BUS_PROPERTY("ScopesMask", "t", property_get_scopes_mask, 0, 0),

SD_BUS_PROPERTY("DNS", "a(iay)", property_get_dns, 0, 0),

SD_BUS_PROPERTY("Domains", "as", property_get_domains, 0, 0),

SD_BUS_PROPERTY("LLMNR", "s", property_get_resolve_support, offsetof(Link, llmnr_support), 0),

SD_BUS_PROPERTY("MulticastDNS", "s", property_get_resolve_support, offsetof(Link, mdns_support), 0),

SD_BUS_PROPERTY("DNSSEC", "s", property_get_dnssec_mode, offsetof(Link, dnssec_mode), 0),

SD_BUS_PROPERTY("DNSSECNegativeTrustAnchors", "as", property_get_ntas, 0, 0),

SD_BUS_METHOD("SetDNS", "a(iay)", NULL, bus_link_method_set_dns_servers, 0),

SD_BUS_METHOD("SetDomains", "as", NULL, bus_link_method_set_search_domains, 0),

SD_BUS_METHOD("SetLLMNR", "s", NULL, bus_link_method_set_llmnr, 0),

SD_BUS_METHOD("SetMulticastDNS", "s", NULL, bus_link_method_set_mdns, 0),

SD_BUS_METHOD("SetDNSSEC", "s", NULL, bus_link_method_set_dnssec, 0),

SD_BUS_METHOD("SetDNSSECNegativeTrustAnchors", "as", NULL, bus_link_method_set_dnssec_negative_trust_anchors, 0),

SD_BUS_METHOD("Revert", NULL, NULL, bus_link_method_revert, 0),

SD_BUS_VTABLE_END

};

int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {

_cleanup_free_ char *e = NULL;

Manager *m = userdata;

int ifindex;

Link *link;

int r;

assert(bus);

assert(path);

assert(interface);

assert(found);

assert(m);

r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/link", &e);

if (r <= 0)

return 0;

r = parse_ifindex(e, &ifindex);

if (r < 0)

return 0;

link = hashmap_get(m->links, INT_TO_PTR(ifindex));

if (!link)

return 0;

*found = link;

return 1;

}

char *link_bus_path(Link *link) {

_cleanup_free_ char *ifindex = NULL;

char *p;

int r;

assert(link);

if (asprintf(&ifindex, "%i", link->ifindex) < 0)

return NULL;

r = sd_bus_path_encode("/org/freedesktop/resolve1/link", ifindex, &p);

if (r < 0)

return NULL;

return p;

}

int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {

_cleanup_strv_free_ char **l = NULL;

Manager *m = userdata;

Link *link;

Iterator i;

unsigned c = 0;

assert(bus);

assert(path);

assert(m);

assert(nodes);

l = new0(char*, hashmap_size(m->links) + 1);

if (!l)

return -ENOMEM;

HASHMAP_FOREACH(link, m->links, i) {

char *p;

p = link_bus_path(link);

if (!p)

return -ENOMEM;

l[c++] = p;

}

l[c] = NULL;

*nodes = l;

l = NULL;

return 1;

}