2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

a9cdc94f7ff40f22a3cf9472f612a80730a1b010Dave Reisner#include <arpa/inet.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include <resolv.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include <net/if.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include <sys/ioctl.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include <sys/poll.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include <netinet/in.h>

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "rtnl-util.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "event-util.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "network-util.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "network-internal.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "conf-parser.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "socket-util.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "af-list.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "utf8.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "fileio-label.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "resolved-dns-domain.h"

0affed79d2e30013f07cb94e6f07e3fcb81c02faLennart Poettering#include "resolved-conf.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "resolved-bus.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#include "resolved-manager.h"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Manager *m = userdata;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering uint16_t type;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Link *l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int ifindex, r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(rtnl);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(mm);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_get_type(mm, &type);

1b12a7b5896f94bdf33b3a6661ebabd761ea6adcHarald Hoyer if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering l = hashmap_get(m->links, INT_TO_PTR(ifindex));

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering switch (type) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case RTM_NEWLINK:{

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering bool is_new = !l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!l) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_new(m, &l, ifindex);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_update_rtnl(l, mm);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_update_monitor(l);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (is_new)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_debug("Found new link %i/%s", ifindex, l->name);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case RTM_DELLINK:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (l) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_debug("Removing link %i/%s", l->ifindex, l->name);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering link_free(l);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringfail:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(r, "Failed to process RTNL link message: %m");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Manager *m = userdata;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering union in_addr_union address;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering uint16_t type;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r, ifindex, family;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering LinkAddress *a;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Link *l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(rtnl);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(mm);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_get_type(mm, &type);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering l = hashmap_get(m->links, INT_TO_PTR(ifindex));

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!l)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_addr_get_family(mm, &family);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering switch (family) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case AF_INET:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_read_in_addr(mm, IFA_LOCAL, &address.in);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_read_in_addr(mm, IFA_ADDRESS, &address.in);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case AF_INET6:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering default:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering a = link_find_address(l, family, &address);

b92bea5d2a9481de69bb627a7b442a9f58fca43dZbigniew Jędrzejewski-Szmek

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering switch (type) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case RTM_NEWADDR:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!a) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_address_new(l, &a, family, &address);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_address_update_rtnl(a, mm);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case RTM_DELADDR:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (a)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering link_address_free(a);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringfail:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(r, "Failed to process RTNL address message: %m");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int manager_rtnl_listen(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_rtnl_message *i;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* First, subscibe to interfaces coming and going */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_attach_event(m->rtnl, m->event, 0);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Then, enumerate all links */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_request_dump(req, true);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_call(m->rtnl, req, 0, &reply);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering for (i = reply; i; i = sd_rtnl_message_next(i)) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_process_link(m->rtnl, i, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering req = sd_rtnl_message_unref(req);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering reply = sd_rtnl_message_unref(reply);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Finally, enumerate all addresses, too */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_message_request_dump(req, true);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_rtnl_call(m->rtnl, req, 0, &reply);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering for (i = reply; i; i = sd_rtnl_message_next(i)) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_process_address(m->rtnl, i, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna Manager *m = userdata;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Iterator i;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Link *l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_network_monitor_flush(m->network_monitor);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering HASHMAP_FOREACH(l, m->links, i) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = link_update_monitor(l);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_write_resolv_conf(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(r, "Could not update resolv.conf: %m");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int manager_network_monitor_listen(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r, fd, events;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_network_monitor_new(&m->network_monitor, NULL);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering fd = sd_network_monitor_get_fd(m->network_monitor);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (fd < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return fd;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering events = sd_network_monitor_get_events(m->network_monitor);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (events < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return events;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagnastatic int determine_hostname(char **ret) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_free_ char *h = NULL, *n = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(ret);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering h = gethostname_malloc();

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!h)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return log_oom();

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!utf8_is_valid(h)) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_error("System hostname is not UTF-8 clean.");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -EINVAL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = dns_name_normalize(h, &n);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_error("System hostname '%s' cannot be normalized.", h);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering *ret = n;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering n = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_free_ char *h = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Manager *m = userdata;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = determine_hostname(&h);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0; /* ignore invalid hostnames */

2f7a4867babd3fd382e5495f21724358f30fa67dMichal Sekletar

2f7a4867babd3fd382e5495f21724358f30fa67dMichal Sekletar if (streq(h, m->hostname))

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_info("System hostname changed to '%s'.", h);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering free(m->hostname);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->hostname = h;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering h = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering manager_refresh_rrs(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

0affed79d2e30013f07cb94e6f07e3fcb81c02faLennart Poettering return 0;

0affed79d2e30013f07cb94e6f07e3fcb81c02faLennart Poettering}

0affed79d2e30013f07cb94e6f07e3fcb81c02faLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringstatic int manager_watch_hostname(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (m->hostname_fd < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(errno, "Failed to watch hostname: %m");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r == -EPERM)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->hostname_fd = safe_close(m->hostname_fd);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna else

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return log_error_errno(r, "Failed to add hostname event source: %m");

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna }

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna r = determine_hostname(&m->hostname);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r < 0) {

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna log_info("Defaulting to hostname 'linux'.");

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->hostname = strdup("linux");

7fd1b19bc9e9f5574f2877936b8ac267c7706947Harald Hoyer if (!m->hostname)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return log_oom();

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna } else

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna log_info("Using system hostname '%s'.", m->hostname);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return 0;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna}

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagnastatic void manager_llmnr_stop(Manager *m) {

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna assert(m);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek}

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagnastatic int manager_llmnr_start(Manager *m) {

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna int r;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna assert(m);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (m->llmnr_support == SUPPORT_NO)

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek return 0;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna r = manager_llmnr_ipv4_udp_fd(m);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r == -EADDRINUSE)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna goto eaddrinuse;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r < 0)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return r;

8333c77edf8fd1654cd96f3f6ee0f078dd64b58bZbigniew Jędrzejewski-Szmek

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna r = manager_llmnr_ipv4_tcp_fd(m);

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek if (r == -EADDRINUSE)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna goto eaddrinuse;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r < 0)

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek return r;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (socket_ipv6_is_supported()) {

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna r = manager_llmnr_ipv6_udp_fd(m);

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek if (r == -EADDRINUSE)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna goto eaddrinuse;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r < 0)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return r;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna r = manager_llmnr_ipv6_tcp_fd(m);

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r == -EADDRINUSE)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna goto eaddrinuse;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna if (r < 0)

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return r;

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek }

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna return 0;

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmekeaddrinuse:

17d33cecaa762f7e43200307328af5e9135e2091Giovanni Campagna log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->llmnr_support = SUPPORT_NO;

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek manager_llmnr_stop(m);

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringint manager_new(Manager **ret) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_(manager_freep) Manager *m = NULL;

7c2d80944afb4196f2eff614e8da1450dffcbeaaThomas Hindoe Paaboel Andersen int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

bac3c8eefe23a820caac930d41629cebafbfc7b2Zbigniew Jędrzejewski-Szmek assert(ret);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m = new0(Manager, 1);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!m)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -ENOMEM;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->dns_ipv4_fd = m->dns_ipv6_fd = -1;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->hostname_fd = -1;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->llmnr_support = SUPPORT_YES;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->read_resolv_conf = true;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_parse_dns_server(m, DNS_SERVER_FALLBACK, DNS_SERVERS);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = sd_event_default(&m->event);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_set_watchdog(m->event, true);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_watch_hostname(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_network_monitor_listen(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_rtnl_listen(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_connect_bus(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering *ret = m;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringint manager_start(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = manager_llmnr_start(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart PoetteringManager *manager_free(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Link *l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!m)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering while ((l = hashmap_first(m->links)))

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering link_free(l);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering while (m->dns_queries)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering dns_query_free(m->dns_queries);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering dns_scope_free(m->unicast_scope);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);

7fd1b19bc9e9f5574f2877936b8ac267c7706947Harald Hoyer manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering hashmap_free(m->links);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering hashmap_free(m->dns_transactions);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_source_unref(m->network_event_source);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_network_monitor_unref(m->network_monitor);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_source_unref(m->dns_ipv4_event_source);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_source_unref(m->dns_ipv6_event_source);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering safe_close(m->dns_ipv4_fd);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering safe_close(m->dns_ipv6_fd);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering manager_llmnr_stop(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_bus_slot_unref(m->prepare_for_sleep_slot);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_source_unref(m->bus_retry_event_source);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_bus_unref(m->bus);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_unref(m->event);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering dns_resource_key_unref(m->host_ipv4_key);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering dns_resource_key_unref(m->host_ipv6_key);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering safe_close(m->hostname_fd);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering sd_event_source_unref(m->hostname_event_source);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering free(m->hostname);

7c2d80944afb4196f2eff614e8da1450dffcbeaaThomas Hindoe Paaboel Andersen

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering free(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringint manager_read_resolv_conf(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_fclose_ FILE *f = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct stat st, own;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering char line[LINE_MAX];

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering DnsServer *s, *nx;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering usec_t t;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Reads the system /etc/resolv.conf, if it exists and is not

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!m->read_resolv_conf)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = stat("/etc/resolv.conf", &st);

6b2b6f30e38d67b032d6bdc6b47ae05e143e96c5Michal Schmidt if (r < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (errno != ENOENT)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = -errno;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto clear;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Have we already seen the file? */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering t = timespec_load(&st.st_mtim);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (t == m->resolv_conf_mtime)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering m->resolv_conf_mtime = t;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Is it symlinked to our own file? */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (stat("/run/systemd/resolve/resolv.conf", &own) >= 0 &&

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering st.st_dev == own.st_dev &&

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering st.st_ino == own.st_ino) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto clear;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

7fd1b19bc9e9f5574f2877936b8ac267c7706947Harald Hoyer f = fopen("/etc/resolv.conf", "re");

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (!f) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (errno != ENOENT)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = -errno;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering goto clear;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (fstat(fileno(f), &st) < 0) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering log_error_errno(errno, "Failed to stat open file: %m");

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = -errno;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering goto clear;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering s->marked = true;

c62e11ce3966c55d23520b9f0785c7e839cf7f37Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering FOREACH_LINE(line, f, r = -errno; goto clear) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering union in_addr_union address;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering int family;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering char *l;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering const char *a;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering truncate_nl(line);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering l = strstrip(line);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (*l == '#' || *l == ';')

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering continue;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering a = first_word(l, "nameserver");

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (!a)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering continue;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = in_addr_from_string_auto(a, &family, &address);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (r < 0) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering log_warning("Failed to parse name server %s.", a);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering continue;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (s->family == family && in_addr_equal(family, &s->address, &address) > 0)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering break;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (s)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering s->marked = false;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering else {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &address);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (r < 0)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering goto clear;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (s->marked)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering dns_server_free(s);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering /* Whenever /etc/resolv.conf changes, start using the first

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering manager_set_dns_server(m, m->dns_servers);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering return 0;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poetteringclear:

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering while (m->dns_servers)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering dns_server_free(m->dns_servers);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering return r;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering}

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poetteringstatic void write_resolv_conf_server(DnsServer *s, FILE *f, unsigned *count) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering _cleanup_free_ char *t = NULL;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering int r;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(s);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(f);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(count);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = in_addr_to_string(s->family, &s->address, &t);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (r < 0) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering log_warning_errno(r, "Invalid DNS address. Ignoring: %m");

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering return;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (*count == MAXNS)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fputs("# Too many DNS servers configured, the following entries may be ignored.\n", f);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fprintf(f, "nameserver %s\n", t);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering (*count) ++;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering}

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poetteringstatic void write_resolv_conf_search(const char *domain, FILE *f,

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering unsigned *count, unsigned *length) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(domain);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(f);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering assert(length);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (*count >= MAXDNSRCH ||

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering *length + strlen(domain) > 256) {

82c1d8f4eb74ddd9be2c9b9b56d9dc564c599effLennart Poettering if (*count == MAXDNSRCH)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fputs(" # Too many search domains configured, remaining ones ignored.", f);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (*length <= 256)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fputs(" # Total length of all search domains is too long, remaining ones ignored.", f);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering return;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fprintf(f, " %s", domain);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering (*length) += strlen(domain);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering (*count) ++;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poetteringstatic int write_resolv_conf_contents(FILE *f, Set *dns, Set *domains) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering Iterator i;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering "# Third party programs must not access this file directly, but\n"

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering "# only through the symlink at /etc/resolv.conf. To manage\n"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering "# resolv.conf(5) in a different way, replace the symlink by a\n"

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering "# static file or a different symlink.\n\n", f);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (set_isempty(dns))

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering fputs("# No DNS servers known.\n", f);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering else {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering DnsServer *s;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering unsigned count = 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering SET_FOREACH(s, dns, i)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering write_resolv_conf_server(s, f, &count);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!set_isempty(domains)) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering unsigned length = 0, count = 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering char *domain;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering fputs("search", f);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering SET_FOREACH(domain, domains, i)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering write_resolv_conf_search(domain, f, &count, &length);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering fputs("\n", f);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return fflush_and_check(f);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringint manager_write_resolv_conf(Manager *m) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering static const char path[] = "/run/systemd/resolve/resolv.conf";

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_free_ char *temp_path = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_fclose_ FILE *f = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_set_free_ Set *dns = NULL, *domains = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering DnsServer *s;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Iterator i;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering Link *l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Read the system /etc/resolv.conf first */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering manager_read_resolv_conf(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Add the full list to a set, to filter out duplicates */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering dns = set_new(&dns_server_hash_ops);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!dns)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -ENOMEM;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering domains = set_new(&dns_name_hash_ops);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!domains)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -ENOMEM;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* First add the system-wide servers */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering LIST_FOREACH(servers, s, m->dns_servers) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = set_put(dns, s);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r == -EEXIST)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering continue;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering /* Then, add the per-link servers and domains */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering HASHMAP_FOREACH(l, m->links, i) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering char **domain;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering LIST_FOREACH(servers, s, l->dns_servers) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = set_put(dns, s);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r == -EEXIST)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering continue;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (!l->unicast_scope)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering continue;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering STRV_FOREACH(domain, l->unicast_scope->domains) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = set_put(domains, *domain);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r == -EEXIST)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering continue;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering /* If we found nothing, add the fallback servers */

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (set_isempty(dns)) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering LIST_FOREACH(servers, s, m->fallback_dns_servers) {

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering r = set_put(dns, s);

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (r == -EEXIST)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering continue;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering if (r < 0)

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering return r;

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

50cfc579280fb42569488079bd2e249e32a27df2Lennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = fopen_temporary_label(path, path, &f, &temp_path);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering fchmod(fileno(f), 0644);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = write_resolv_conf_contents(f, dns, domains);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (rename(temp_path, path) < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = -errno;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering goto fail;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringfail:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering unlink(path);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering unlink(temp_path);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering}

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poetteringint manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering union {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct cmsghdr header; /* For alignment */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo))

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering + CMSG_SPACE(int) /* ttl/hoplimit */

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering } control;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering union sockaddr_union sa;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct msghdr mh = {};

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct cmsghdr *cmsg;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct iovec iov;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering int ms = 0, r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering ssize_t l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(m);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(fd >= 0);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(ret);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = ioctl(fd, FIONREAD, &ms);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -errno;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (ms < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -EIO;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering r = dns_packet_new(&p, protocol, ms);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (r < 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return r;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering iov.iov_base = DNS_PACKET_DATA(p);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering iov.iov_len = p->allocated;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_name = &sa.sa;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_namelen = sizeof(sa);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_iov = &iov;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_iovlen = 1;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_control = &control;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering mh.msg_controllen = sizeof(control);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering l = recvmsg(fd, &mh, 0);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (l < 0) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (errno == EAGAIN || errno == EINTR)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return 0;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -errno;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (l <= 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -EIO;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(!(mh.msg_flags & MSG_CTRUNC));

a9cdc94f7ff40f22a3cf9472f612a80730a1b010Dave Reisner assert(!(mh.msg_flags & MSG_TRUNC));

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->size = (size_t) l;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->family = sa.sa.sa_family;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->ipproto = IPPROTO_UDP;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (p->family == AF_INET) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->sender.in = sa.in.sin_addr;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->sender_port = be16toh(sa.in.sin_port);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering } else if (p->family == AF_INET6) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->sender.in6 = sa.in6.sin6_addr;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->sender_port = be16toh(sa.in6.sin6_port);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->ifindex = sa.in6.sin6_scope_id;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering } else

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering return -EAFNOSUPPORT;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (cmsg->cmsg_level == IPPROTO_IPV6) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering assert(p->family == AF_INET6);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering switch (cmsg->cmsg_type) {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case IPV6_PKTINFO: {

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering if (p->ifindex <= 0)

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->ifindex = i->ipi6_ifindex;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->destination.in6 = i->ipi6_addr;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering case IPV6_HOPLIMIT:

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering p->ttl = *(int *) CMSG_DATA(cmsg);

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering break;

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering

2087a7aff26ea5d1bc2c7c29add3275328f36baaLennart Poettering }

} else if (cmsg->cmsg_level == IPPROTO_IP) {

assert(p->family == AF_INET);

switch (cmsg->cmsg_type) {

case IP_PKTINFO: {

struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);

if (p->ifindex <= 0)

p->ifindex = i->ipi_ifindex;

p->destination.in = i->ipi_addr;

break;

}

case IP_TTL:

p->ttl = *(int *) CMSG_DATA(cmsg);

break;

}

}

}

/* The Linux kernel sets the interface index to the loopback

if (p->ifindex == LOOPBACK_IFINDEX)

p->ifindex = 0;

/* If we don't know the interface index still, we look for the

if (p->ifindex <= 0)

p->ifindex = manager_find_ifindex(m, p->family, &p->destination);

*ret = p;

p = NULL;

return 1;

}

static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

DnsTransaction *t = NULL;

Manager *m = userdata;

int r;

r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);

if (r <= 0)

return r;

if (dns_packet_validate_reply(p) > 0) {

t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

if (!t)

return 0;

dns_transaction_process_reply(t, p);

} else

log_debug("Invalid DNS packet.");

return 0;

}

int manager_dns_ipv4_fd(Manager *m) {

const int one = 1;

int r;

assert(m);

if (m->dns_ipv4_fd >= 0)

return m->dns_ipv4_fd;

m->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (m->dns_ipv4_fd < 0)

return -errno;

r = setsockopt(m->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = sd_event_add_io(m->event, &m->dns_ipv4_event_source, m->dns_ipv4_fd, EPOLLIN, on_dns_packet, m);

if (r < 0)

goto fail;

return m->dns_ipv4_fd;

fail:

m->dns_ipv4_fd = safe_close(m->dns_ipv4_fd);

return r;

}

int manager_dns_ipv6_fd(Manager *m) {

const int one = 1;

int r;

assert(m);

if (m->dns_ipv6_fd >= 0)

return m->dns_ipv6_fd;

m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (m->dns_ipv6_fd < 0)

return -errno;

r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = sd_event_add_io(m->event, &m->dns_ipv6_event_source, m->dns_ipv6_fd, EPOLLIN, on_dns_packet, m);

if (r < 0)

goto fail;

return m->dns_ipv6_fd;

fail:

m->dns_ipv6_fd = safe_close(m->dns_ipv6_fd);

return r;

}

static int sendmsg_loop(int fd, struct msghdr *mh, int flags) {

int r;

assert(fd >= 0);

assert(mh);

for (;;) {

if (sendmsg(fd, mh, flags) >= 0)

return 0;

if (errno == EINTR)

continue;

if (errno != EAGAIN)

return -errno;

r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);

if (r < 0)

return r;

if (r == 0)

return -ETIMEDOUT;

}

}

static int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) {

union sockaddr_union sa = {

.in.sin_family = AF_INET,

};

union {

struct cmsghdr header; /* For alignment */

uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];

} control;

struct msghdr mh = {};

struct iovec iov;

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

iov.iov_base = DNS_PACKET_DATA(p);

iov.iov_len = p->size;

sa.in.sin_addr = *addr;

sa.in.sin_port = htobe16(port),

mh.msg_iov = &iov;

mh.msg_iovlen = 1;

mh.msg_name = &sa.sa;

mh.msg_namelen = sizeof(sa.in);

if (ifindex > 0) {

struct cmsghdr *cmsg;

struct in_pktinfo *pi;

zero(control);

mh.msg_control = &control;

mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));

cmsg = CMSG_FIRSTHDR(&mh);

cmsg->cmsg_len = mh.msg_controllen;

cmsg->cmsg_level = IPPROTO_IP;

cmsg->cmsg_type = IP_PKTINFO;

pi = (struct in_pktinfo*) CMSG_DATA(cmsg);

pi->ipi_ifindex = ifindex;

}

return sendmsg_loop(fd, &mh, 0);

}

static int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) {

union sockaddr_union sa = {

.in6.sin6_family = AF_INET6,

};

union {

struct cmsghdr header; /* For alignment */

uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];

} control;

struct msghdr mh = {};

struct iovec iov;

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

iov.iov_base = DNS_PACKET_DATA(p);

iov.iov_len = p->size;

sa.in6.sin6_addr = *addr;

sa.in6.sin6_port = htobe16(port),

sa.in6.sin6_scope_id = ifindex;

mh.msg_iov = &iov;

mh.msg_iovlen = 1;

mh.msg_name = &sa.sa;

mh.msg_namelen = sizeof(sa.in6);

if (ifindex > 0) {

struct cmsghdr *cmsg;

struct in6_pktinfo *pi;

zero(control);

mh.msg_control = &control;

mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));

cmsg = CMSG_FIRSTHDR(&mh);

cmsg->cmsg_len = mh.msg_controllen;

cmsg->cmsg_level = IPPROTO_IPV6;

cmsg->cmsg_type = IPV6_PKTINFO;

pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);

pi->ipi6_ifindex = ifindex;

}

return sendmsg_loop(fd, &mh, 0);

}

int manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) {

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

log_debug("Sending %s packet with id %u on interface %i/%s", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p), ifindex, af_to_name(family));

if (family == AF_INET)

return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p);

else if (family == AF_INET6)

return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p);

return -EAFNOSUPPORT;

}

DnsServer* manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {

DnsServer *s;

assert(m);

assert(in_addr);

LIST_FOREACH(servers, s, m->dns_servers)

if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

return s;

LIST_FOREACH(servers, s, m->fallback_dns_servers)

if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

return s;

return NULL;

}

DnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {

assert(m);

if (m->current_dns_server == s)

return s;

if (s) {

_cleanup_free_ char *ip = NULL;

in_addr_to_string(s->family, &s->address, &ip);

log_info("Switching to system DNS server %s.", strna(ip));

}

m->current_dns_server = s;

if (m->unicast_scope)

dns_cache_flush(&m->unicast_scope->cache);

return s;

}

DnsServer *manager_get_dns_server(Manager *m) {

Link *l;

assert(m);

/* Try to read updates resolv.conf */

manager_read_resolv_conf(m);

if (!m->current_dns_server)

manager_set_dns_server(m, m->dns_servers);

if (!m->current_dns_server) {

bool found = false;

Iterator i;

/* No DNS servers configured, let's see if there are

HASHMAP_FOREACH(l, m->links, i)

if (l->dns_servers) {

found = true;

break;

}

if (!found)

manager_set_dns_server(m, m->fallback_dns_servers);

}

return m->current_dns_server;

}

void manager_next_dns_server(Manager *m) {

assert(m);

/* If there's currently no DNS server set, then the next

if (!m->current_dns_server)

return;

/* Change to the next one */

if (m->current_dns_server->servers_next) {

manager_set_dns_server(m, m->current_dns_server->servers_next);

return;

}

/* If there was no next one, then start from the beginning of

if (m->current_dns_server->type == DNS_SERVER_FALLBACK)

manager_set_dns_server(m, m->fallback_dns_servers);

else

manager_set_dns_server(m, m->dns_servers);

}

uint32_t manager_find_mtu(Manager *m) {

uint32_t mtu = 0;

Link *l;

Iterator i;

/* If we don't know on which link a DNS packet would be

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

if (l->mtu <= 0)

continue;

if (mtu <= 0 || l->mtu < mtu)

mtu = l->mtu;

}

return mtu;

}

static int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

DnsTransaction *t = NULL;

Manager *m = userdata;

DnsScope *scope;

int r;

r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);

if (r <= 0)

return r;

scope = manager_find_scope(m, p);

if (!scope) {

log_warning("Got LLMNR UDP packet on unknown scope. Ignoring.");

return 0;

}

if (dns_packet_validate_reply(p) > 0) {

log_debug("Got reply packet for id %u", DNS_PACKET_ID(p));

dns_scope_check_conflicts(scope, p);

t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

if (t)

dns_transaction_process_reply(t, p);

} else if (dns_packet_validate_query(p) > 0) {

log_debug("Got query packet for id %u", DNS_PACKET_ID(p));

dns_scope_process_query(scope, NULL, p);

} else

log_debug("Invalid LLMNR UDP packet.");

return 0;

}

int manager_llmnr_ipv4_udp_fd(Manager *m) {

union sockaddr_union sa = {

.in.sin_family = AF_INET,

.in.sin_port = htobe16(5355),

};

static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;

int r;

assert(m);

if (m->llmnr_ipv4_udp_fd >= 0)

return m->llmnr_ipv4_udp_fd;

m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (m->llmnr_ipv4_udp_fd < 0)

return -errno;

/* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv4_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

/* Disable Don't-Fragment bit in the IP header */

r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));

if (r < 0) {

r = -errno;

goto fail;