091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen#include <resolv.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <sys/ioctl.h>

0a6f50c0afdfc434b492493bd9efab20cbee8623Thomas Hindoe Paaboel Andersen#include <poll.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <netinet/in.h>

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen#include "netlink-util.h"

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen#include "network-internal.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "socket-util.h"

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering#include "af-list.h"

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering#include "utf8.h"

a5a807e63a50314e190e9166d8a453cd8dd258e3Zbigniew Jędrzejewski-Szmek#include "fileio-label.h"

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering#include "ordered-set.h"

3df3e884ae1237ef0d4d23b0e80f4ffda95ac135Ronny Chevalier#include "random-util.h"

958b66ea16deddd794b3a52643bd44633e165eadLennart Poettering#include "hostname-util.h"

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4ad7f2761da661853dcc29d542efb4727abb1101Nick Owens#include "dns-domain.h"

39d8db043b599a7382f94bfc904d5e108af438bdLennart Poettering#include "resolved-conf.h"

39d8db043b599a7382f94bfc904d5e108af438bdLennart Poettering#include "resolved-bus.h"

39d8db043b599a7382f94bfc904d5e108af438bdLennart Poettering#include "resolved-manager.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersenstatic int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Manager *m = userdata;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering uint16_t type;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int ifindex, r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(rtnl);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(mm);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_get_type(mm, &type);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering l = hashmap_get(m->links, INT_TO_PTR(ifindex));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering switch (type) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering case RTM_NEWLINK:{

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering bool is_new = !l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering if (!l) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = link_new(m, &l, ifindex);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = link_update_rtnl(l, mm);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering r = link_update_monitor(l);

21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering if (r < 0)

21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering goto fail;

21d73c87b09ec2b8642424bc714ce9af3da4fc40Lennart Poettering

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering if (is_new)

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering log_debug("Found new link %i/%s", ifindex, l->name);

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case RTM_DELLINK:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (l) {

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering log_debug("Removing link %i/%s", l->ifindex, l->name);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering link_free(l);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringfail:

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt log_warning_errno(r, "Failed to process RTNL link message: %m");

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersenstatic int manager_process_address(sd_netlink *rtnl, sd_netlink_message *mm, void *userdata) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Manager *m = userdata;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering union in_addr_union address;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering uint16_t type;

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering int r, ifindex, family;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering LinkAddress *a;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(rtnl);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(mm);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_get_type(mm, &type);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering l = hashmap_get(m->links, INT_TO_PTR(ifindex));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!l)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_addr_get_family(mm, &family);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering switch (family) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case AF_INET:

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_read_in_addr(mm, IFA_LOCAL, &address.in);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0) {

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_read_in_addr(mm, IFA_ADDRESS, &address.in);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case AF_INET6:

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0) {

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering default:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering a = link_find_address(l, family, &address);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering switch (type) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case RTM_NEWADDR:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!a) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = link_address_new(l, &a, family, &address);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = link_address_update_rtnl(a, mm);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case RTM_DELADDR:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (a)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering link_address_free(a);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringfail:

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt log_warning_errno(r, "Failed to process RTNL address message: %m");

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int manager_rtnl_listen(Manager *m) {

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen _cleanup_netlink_message_unref_ sd_netlink_message *req = NULL, *reply = NULL;

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen sd_netlink_message *i;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

cc98b3025eeb89addb76a27390cb2baca4eab8b9Torstein Husebø /* First, subscribe to interfaces coming and going */

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_open(&m->rtnl);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_attach_event(m->rtnl, m->event, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering /* Then, enumerate all links */

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_request_dump(req, true);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_call(m->rtnl, req, 0, &reply);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen for (i = reply; i; i = sd_netlink_message_next(i)) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_process_link(m->rtnl, i, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen req = sd_netlink_message_unref(req);

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen reply = sd_netlink_message_unref(reply);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering /* Finally, enumerate all addresses, too */

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_message_request_dump(req, true);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen r = sd_netlink_call(m->rtnl, req, 0, &reply);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen for (i = reply; i; i = sd_netlink_message_next(i)) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_process_address(m->rtnl, i, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Manager *m = userdata;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Iterator i;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_network_monitor_flush(m->network_monitor);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering HASHMAP_FOREACH(l, m->links, i) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = link_update_monitor(l);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_write_resolv_conf(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt log_warning_errno(r, "Could not update resolv.conf: %m");

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int manager_network_monitor_listen(Manager *m) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r, fd, events;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

0014a4ad505d119c7ac4346d9d774c3f17f663a5Lennart Poettering r = sd_network_monitor_new(&m->network_monitor, NULL);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering fd = sd_network_monitor_get_fd(m->network_monitor);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (fd < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return fd;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering events = sd_network_monitor_get_events(m->network_monitor);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (events < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return events;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poetteringstatic int determine_hostname(char **ret) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering _cleanup_free_ char *h = NULL, *n = NULL;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering int r;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering assert(ret);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering h = gethostname_malloc();

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (!h)

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return log_oom();

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (!utf8_is_valid(h)) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering log_error("System hostname is not UTF-8 clean.");

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return -EINVAL;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering }

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering r = dns_name_normalize(h, &n);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r < 0) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering log_error("System hostname '%s' cannot be normalized.", h);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return r;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering }

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering *ret = n;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering n = NULL;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering}

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poetteringstatic int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering _cleanup_free_ char *h = NULL;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering Manager *m = userdata;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering int r;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering assert(m);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering r = determine_hostname(&h);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r < 0)

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0; /* ignore invalid hostnames */

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (streq(h, m->hostname))

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering log_info("System hostname changed to '%s'.", h);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering free(m->hostname);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering m->hostname = h;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering h = NULL;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering manager_refresh_rrs(m);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering}

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poetteringstatic int manager_watch_hostname(Manager *m) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering int r;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering assert(m);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (m->hostname_fd < 0) {

56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt log_warning_errno(errno, "Failed to watch hostname: %m");

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering }

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r < 0) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r == -EPERM)

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering m->hostname_fd = safe_close(m->hostname_fd);

8d3d7072e609ef0e0fb37e1d19a29307d58146c3Michal Schmidt else

8d3d7072e609ef0e0fb37e1d19a29307d58146c3Michal Schmidt return log_error_errno(r, "Failed to add hostname event source: %m");

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering }

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering r = determine_hostname(&m->hostname);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r < 0) {

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering log_info("Defaulting to hostname 'linux'.");

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering m->hostname = strdup("linux");

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (!m->hostname)

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return log_oom();

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering } else

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering log_info("Using system hostname '%s'.", m->hostname);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return 0;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering}

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poetteringstatic void manager_llmnr_stop(Manager *m) {

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering assert(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering}

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poetteringstatic int manager_llmnr_start(Manager *m) {

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering int r;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering assert(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (m->llmnr_support == SUPPORT_NO)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return 0;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering r = manager_llmnr_ipv4_udp_fd(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (r == -EADDRINUSE)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering goto eaddrinuse;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (r < 0)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return r;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering r = manager_llmnr_ipv4_tcp_fd(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (r == -EADDRINUSE)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering goto eaddrinuse;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (r < 0)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return r;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering if (socket_ipv6_is_supported()) {

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering r = manager_llmnr_ipv6_udp_fd(m);

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering if (r == -EADDRINUSE)

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering goto eaddrinuse;

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering if (r < 0)

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering return r;

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering r = manager_llmnr_ipv6_tcp_fd(m);

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering if (r == -EADDRINUSE)

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering goto eaddrinuse;

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering if (r < 0)

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering return r;

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering }

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return 0;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poetteringeaddrinuse:

c4147df156835513c43260a14fc9f7af177f737fLennart Poettering log_warning("There appears to be another LLMNR responder running. Turning off LLMNR support.");

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering m->llmnr_support = SUPPORT_NO;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering manager_llmnr_stop(m);

90ab504273a7f186ebb76e6acfb778b4e0d7c91bLennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return 0;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering}

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersenint manager_new(Manager **ret) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering _cleanup_(manager_freep) Manager *m = NULL;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen int r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

c92e531c82a9815ec349aa1bf31236b86b2d5311Lennart Poettering assert(ret);

c92e531c82a9815ec349aa1bf31236b86b2d5311Lennart Poettering

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen m = new0(Manager, 1);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (!m)

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return -ENOMEM;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering m->dns_ipv4_fd = m->dns_ipv6_fd = -1;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering m->hostname_fd = -1;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering m->llmnr_support = SUPPORT_YES;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering m->read_resolv_conf = true;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering r = manager_parse_dns_server(m, DNS_SERVER_FALLBACK, DNS_SERVERS);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (r < 0)

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen r = sd_event_default(&m->event);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (r < 0)

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen sd_event_set_watchdog(m->event, true);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering r = manager_watch_hostname(m);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering if (r < 0)

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering return r;

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_network_monitor_listen(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_rtnl_listen(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = manager_connect_bus(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen *ret = m;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen m = NULL;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return 0;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poetteringint manager_start(Manager *m) {

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering int r;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering assert(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering r = manager_llmnr_start(m);

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering if (r < 0)

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return r;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering return 0;

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering}

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringManager *manager_free(Manager *m) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (!m)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering while ((l = hashmap_first(m->links)))

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering link_free(l);

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering while (m->dns_queries)

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering dns_query_free(m->dns_queries);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

cab5b05903096e1c9cf5575ccc73f89d15c8db69Lennart Poettering dns_scope_free(m->unicast_scope);

cab5b05903096e1c9cf5575ccc73f89d15c8db69Lennart Poettering

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering hashmap_free(m->links);

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering hashmap_free(m->dns_transactions);

f0e1546763304aedc90e91d70dab9eeb7c966cf8Lennart Poettering

096b6773886bd7a0c8c97aa684b0b67dfae58355Lennart Poettering sd_event_source_unref(m->network_event_source);

096b6773886bd7a0c8c97aa684b0b67dfae58355Lennart Poettering sd_network_monitor_unref(m->network_monitor);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_event_source_unref(m->dns_ipv4_event_source);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_event_source_unref(m->dns_ipv6_event_source);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering safe_close(m->dns_ipv4_fd);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering safe_close(m->dns_ipv6_fd);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

edc501d4674dadc304d45a7e1c5b69e207eb8cd4Lennart Poettering manager_llmnr_stop(m);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering sd_bus_slot_unref(m->prepare_for_sleep_slot);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_event_source_unref(m->bus_retry_event_source);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_bus_unref(m->bus);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sd_event_unref(m->event);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering dns_resource_key_unref(m->host_ipv4_key);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering dns_resource_key_unref(m->host_ipv6_key);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering safe_close(m->hostname_fd);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering sd_event_source_unref(m->hostname_event_source);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering free(m->hostname);

eb60f9cd4e93ff5016dc1b5486fd1b7e1565fd92Lennart Poettering

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen free(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return NULL;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poetteringint manager_read_resolv_conf(Manager *m) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering _cleanup_fclose_ FILE *f = NULL;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering struct stat st, own;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering char line[LINE_MAX];

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering DnsServer *s, *nx;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering usec_t t;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering int r;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering assert(m);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering /* Reads the system /etc/resolv.conf, if it exists and is not

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (!m->read_resolv_conf)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering return 0;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = stat("/etc/resolv.conf", &st);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (r < 0) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (errno != ENOENT)

56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = -errno;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering goto clear;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering /* Have we already seen the file? */

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering t = timespec_load(&st.st_mtim);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (t == m->resolv_conf_mtime)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering return 0;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering m->resolv_conf_mtime = t;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering /* Is it symlinked to our own file? */

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (stat("/run/systemd/resolve/resolv.conf", &own) >= 0 &&

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering st.st_dev == own.st_dev &&

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering st.st_ino == own.st_ino) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = 0;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering goto clear;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering f = fopen("/etc/resolv.conf", "re");

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (!f) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (errno != ENOENT)

56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = -errno;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering goto clear;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (fstat(fileno(f), &st) < 0) {

56f64d95763a799ba4475daf44d8e9f72a1bd474Michal Schmidt log_error_errno(errno, "Failed to stat open file: %m");

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = -errno;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering goto clear;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering s->marked = true;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering FOREACH_LINE(line, f, r = -errno; goto clear) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering union in_addr_union address;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering int family;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering char *l;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering const char *a;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering truncate_nl(line);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering l = strstrip(line);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (*l == '#' || *l == ';')

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering continue;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering a = first_word(l, "nameserver");

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (!a)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering continue;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = in_addr_from_string_auto(a, &family, &address);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (r < 0) {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering log_warning("Failed to parse name server %s.", a);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering continue;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (s->family == family && in_addr_equal(family, &s->address, &address) > 0)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering break;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (s)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering s->marked = false;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering else {

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &address);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (r < 0)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering goto clear;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering }

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (s->marked)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering dns_server_free(s);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

36a03ca2a8952ca1acb29fbe796210c27ff71affLennart Poettering /* Whenever /etc/resolv.conf changes, start using the first

36a03ca2a8952ca1acb29fbe796210c27ff71affLennart Poettering manager_set_dns_server(m, m->dns_servers);

36a03ca2a8952ca1acb29fbe796210c27ff71affLennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering return 0;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poetteringclear:

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering while (m->dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering dns_server_free(m->dns_servers);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering return r;

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering}

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersenstatic void write_resolv_conf_server(DnsServer *s, FILE *f, unsigned *count) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering _cleanup_free_ char *t = NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(s);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen assert(f);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen assert(count);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = in_addr_to_string(s->family, &s->address, &t);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (r < 0) {

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt log_warning_errno(r, "Invalid DNS address. Ignoring: %m");

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen }

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (*count == MAXNS)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering fputs("# Too many DNS servers configured, the following entries may be ignored.\n", f);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering fprintf(f, "nameserver %s\n", t);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen (*count) ++;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poetteringstatic void write_resolv_conf_search(

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering const char *domain, FILE *f,

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering unsigned *count,

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering unsigned *length) {

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen assert(domain);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen assert(f);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen assert(length);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (*count >= MAXDNSRCH ||

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen *length + strlen(domain) > 256) {

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (*count == MAXDNSRCH)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen fputs(" # Too many search domains configured, remaining ones ignored.", f);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (*length <= 256)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen fputs(" # Total length of all search domains is too long, remaining ones ignored.", f);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen return;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen }

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen fprintf(f, " %s", domain);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen (*length) += strlen(domain);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen (*count) ++;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen}

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poetteringstatic int write_resolv_conf_contents(FILE *f, OrderedSet *dns, OrderedSet *domains) {

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek Iterator i;

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek "# Third party programs must not access this file directly, but\n"

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek "# only through the symlink at /etc/resolv.conf. To manage\n"

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek "# resolv.conf(5) in a different way, replace the symlink by a\n"

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek "# static file or a different symlink.\n\n", f);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering if (ordered_set_isempty(dns))

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek fputs("# No DNS servers known.\n", f);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek else {

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek DnsServer *s;

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek unsigned count = 0;

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering ORDERED_SET_FOREACH(s, dns, i)

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek write_resolv_conf_server(s, f, &count);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek }

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering if (!ordered_set_isempty(domains)) {

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek unsigned length = 0, count = 0;

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek char *domain;

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek fputs("search", f);

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering ORDERED_SET_FOREACH(domain, domains, i)

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek write_resolv_conf_search(domain, f, &count, &length);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek fputs("\n", f);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek }

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek return fflush_and_check(f);

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek}

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint manager_write_resolv_conf(Manager *m) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering static const char path[] = "/run/systemd/resolve/resolv.conf";

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen _cleanup_free_ char *temp_path = NULL;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen _cleanup_fclose_ FILE *f = NULL;

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering _cleanup_ordered_set_free_ OrderedSet *dns = NULL, *domains = NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering DnsServer *s;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Iterator i;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen assert(m);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering /* Read the system /etc/resolv.conf first */

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering manager_read_resolv_conf(m);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering /* Add the full list to a set, to filter out duplicates */

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering dns = ordered_set_new(&dns_server_hash_ops);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (!dns)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering return -ENOMEM;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering domains = ordered_set_new(&dns_name_hash_ops);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (!domains)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen return -ENOMEM;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering /* First add the system-wide servers */

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers) {

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering r = ordered_set_put(dns, s);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r == -EEXIST)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering continue;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r < 0)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering return r;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering }

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen /* Then, add the per-link servers and domains */

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen HASHMAP_FOREACH(l, m->links, i) {

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen char **domain;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering LIST_FOREACH(servers, s, l->dns_servers) {

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering r = ordered_set_put(dns, s);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r == -EEXIST)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering continue;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r < 0)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering return r;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering }

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (!l->unicast_scope)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen continue;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen STRV_FOREACH(domain, l->unicast_scope->domains) {

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering r = ordered_set_put(domains, *domain);

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (r == -EEXIST)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen continue;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen if (r < 0)

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen return r;

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen }

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen }

bda2c408f8a739c19161818bcc842107f60652a2Tom Gundersen

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering /* If we found nothing, add the fallback servers */

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering if (ordered_set_isempty(dns)) {

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering LIST_FOREACH(servers, s, m->fallback_dns_servers) {

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering r = ordered_set_put(dns, s);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r == -EEXIST)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering continue;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering if (r < 0)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering return r;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering }

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering }

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

a5a807e63a50314e190e9166d8a453cd8dd258e3Zbigniew Jędrzejewski-Szmek r = fopen_temporary_label(path, path, &f, &temp_path);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (r < 0)

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen return r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen fchmod(fileno(f), 0644);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

4713135eae4f7b6b670a98476fe413edfa1d9f41Zbigniew Jędrzejewski-Szmek r = write_resolv_conf_contents(f, dns, domains);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (rename(temp_path, path) < 0) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = -errno;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringfail:

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering (void) unlink(path);

822db23cfa98a9fbc48f41e11caafb6f1017e052Lennart Poettering (void) unlink(temp_path);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringint manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering union {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct cmsghdr header; /* For alignment */

40a1eebde6be7ac3f1885147fc24e06ad1da260cDavid Herrmann uint8_t buffer[CMSG_SPACE(MAXSIZE(struct in_pktinfo, struct in6_pktinfo))

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering + CMSG_SPACE(int) /* ttl/hoplimit */

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering } control;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering union sockaddr_union sa;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct msghdr mh = {};

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct cmsghdr *cmsg;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct iovec iov;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering int ms = 0, r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering ssize_t l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(fd >= 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(ret);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = ioctl(fd, FIONREAD, &ms);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -errno;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (ms < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -EIO;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = dns_packet_new(&p, protocol, ms);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_base = DNS_PACKET_DATA(p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_len = p->allocated;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_name = &sa.sa;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_namelen = sizeof(sa);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iov = &iov;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iovlen = 1;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_control = &control;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_controllen = sizeof(control);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

a38d99451f2bf8026ec51aee91662292e823c6a8Lennart Poettering l = recvmsg(fd, &mh, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (l < 0) {

ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering if (errno == EAGAIN || errno == EINTR)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -errno;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen }

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (l <= 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -EIO;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(!(mh.msg_flags & MSG_CTRUNC));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(!(mh.msg_flags & MSG_TRUNC));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering p->size = (size_t) l;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->family = sa.sa.sa_family;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ipproto = IPPROTO_UDP;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (p->family == AF_INET) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->sender.in = sa.in.sin_addr;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->sender_port = be16toh(sa.in.sin_port);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering } else if (p->family == AF_INET6) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->sender.in6 = sa.in6.sin6_addr;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->sender_port = be16toh(sa.in6.sin6_port);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ifindex = sa.in6.sin6_scope_id;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering } else

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return -EAFNOSUPPORT;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

2a1288ff89322a2f49c79f6d1832c8164c14a05cLennart Poettering CMSG_FOREACH(cmsg, &mh) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (cmsg->cmsg_level == IPPROTO_IPV6) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(p->family == AF_INET6);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering switch (cmsg->cmsg_type) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering case IPV6_PKTINFO: {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (p->ifindex <= 0)

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ifindex = i->ipi6_ifindex;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->destination.in6 = i->ipi6_addr;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering break;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering case IPV6_HOPLIMIT:

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->ttl = *(int *) CMSG_DATA(cmsg);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering break;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering } else if (cmsg->cmsg_level == IPPROTO_IP) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(p->family == AF_INET);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering switch (cmsg->cmsg_type) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering case IP_PKTINFO: {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (p->ifindex <= 0)

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ifindex = i->ipi_ifindex;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->destination.in = i->ipi_addr;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering break;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering case IP_TTL:

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering p->ttl = *(int *) CMSG_DATA(cmsg);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering break;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering /* The Linux kernel sets the interface index to the loopback

a5f035960006556beab51c42e6948985635e261aLennart Poettering if (p->ifindex == LOOPBACK_IFINDEX)

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ifindex = 0;

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering /* If we don't know the interface index still, we look for the

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (p->ifindex <= 0)

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering p->ifindex = manager_find_ifindex(m, p->family, &p->destination);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *ret = p;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering p = NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 1;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringstatic int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering DnsTransaction *t = NULL;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Manager *m = userdata;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r <= 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (dns_packet_validate_reply(p) > 0) {

ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (!t)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering dns_transaction_process_reply(t, p);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering } else

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering log_debug("Invalid DNS packet.");

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint manager_dns_ipv4_fd(Manager *m) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering const int one = 1;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen assert(m);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (m->dns_ipv4_fd >= 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return m->dns_ipv4_fd;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering m->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (m->dns_ipv4_fd < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -errno;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = sd_event_add_io(m->event, &m->dns_ipv4_event_source, m->dns_ipv4_fd, EPOLLIN, on_dns_packet, m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return m->dns_ipv4_fd;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringfail:

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering m->dns_ipv4_fd = safe_close(m->dns_ipv4_fd);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return r;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringint manager_dns_ipv6_fd(Manager *m) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering const int one = 1;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (m->dns_ipv6_fd >= 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return m->dns_ipv6_fd;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (m->dns_ipv6_fd < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -errno;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = sd_event_add_io(m->event, &m->dns_ipv6_event_source, m->dns_ipv6_fd, EPOLLIN, on_dns_packet, m);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen if (r < 0)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return m->dns_ipv6_fd;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringfail:

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering m->dns_ipv6_fd = safe_close(m->dns_ipv6_fd);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int sendmsg_loop(int fd, struct msghdr *mh, int flags) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(fd >= 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(mh);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering for (;;) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (sendmsg(fd, mh, flags) >= 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (errno == EINTR)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering continue;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (errno != EAGAIN)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -errno;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r == 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return -ETIMEDOUT;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poetteringstatic int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering union sockaddr_union sa = {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering .in.sin_family = AF_INET,

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering };

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering union {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct cmsghdr header; /* For alignment */

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering } control;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct msghdr mh = {};

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct iovec iov;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(fd >= 0);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(addr);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(port > 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_base = DNS_PACKET_DATA(p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_len = p->size;

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering sa.in.sin_addr = *addr;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering sa.in.sin_port = htobe16(port),

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iov = &iov;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iovlen = 1;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_name = &sa.sa;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_namelen = sizeof(sa.in);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (ifindex > 0) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct cmsghdr *cmsg;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct in_pktinfo *pi;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering zero(control);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_control = &control;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg = CMSG_FIRSTHDR(&mh);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_len = mh.msg_controllen;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_level = IPPROTO_IP;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_type = IP_PKTINFO;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering pi = (struct in_pktinfo*) CMSG_DATA(cmsg);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering pi->ipi_ifindex = ifindex;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return sendmsg_loop(fd, &mh, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poetteringstatic int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering union sockaddr_union sa = {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering .in6.sin6_family = AF_INET6,

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering };

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering union {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering struct cmsghdr header; /* For alignment */

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering } control;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct msghdr mh = {};

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct iovec iov;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(fd >= 0);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(addr);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(port > 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_base = DNS_PACKET_DATA(p);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering iov.iov_len = p->size;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering sa.in6.sin6_addr = *addr;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering sa.in6.sin6_port = htobe16(port),

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering sa.in6.sin6_scope_id = ifindex;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iov = &iov;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_iovlen = 1;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_name = &sa.sa;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_namelen = sizeof(sa.in6);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (ifindex > 0) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct cmsghdr *cmsg;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering struct in6_pktinfo *pi;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering zero(control);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering mh.msg_control = &control;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg = CMSG_FIRSTHDR(&mh);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_len = mh.msg_controllen;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_level = IPPROTO_IPV6;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering cmsg->cmsg_type = IPV6_PKTINFO;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering pi->ipi6_ifindex = ifindex;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return sendmsg_loop(fd, &mh, 0);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poetteringint manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(m);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(fd >= 0);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(addr);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(port > 0);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(p);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering 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));

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (family == AF_INET)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering else if (family == AF_INET6)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return -EAFNOSUPPORT;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering}

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

2c27fbca2d88214bd305272308a370a962818f1eLennart PoetteringDnsServer* manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering DnsServer *s;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(in_addr);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering return s;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LIST_FOREACH(servers, s, m->fallback_dns_servers)

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering return s;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering return NULL;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering}

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

2c27fbca2d88214bd305272308a370a962818f1eLennart PoetteringDnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering assert(m);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (m->current_dns_server == s)

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering return s;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (s) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering _cleanup_free_ char *ip = NULL;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering in_addr_to_string(s->family, &s->address, &ip);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering log_info("Switching to system DNS server %s.", strna(ip));

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering }

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering m->current_dns_server = s;

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering if (m->unicast_scope)

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering dns_cache_flush(&m->unicast_scope->cache);

2c27fbca2d88214bd305272308a370a962818f1eLennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering return s;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringDnsServer *manager_get_dns_server(Manager *m) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering /* Try to read updates resolv.conf */

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering manager_read_resolv_conf(m);

5cb36f41f01cf4b1f4395abfffd1b33116591e58Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!m->current_dns_server)

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering manager_set_dns_server(m, m->dns_servers);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (!m->current_dns_server) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering bool found = false;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering Iterator i;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering /* No DNS servers configured, let's see if there are

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering HASHMAP_FOREACH(l, m->links, i)

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (l->dns_servers) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering found = true;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering break;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering }

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (!found)

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering manager_set_dns_server(m, m->fallback_dns_servers);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return m->current_dns_server;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringvoid manager_next_dns_server(Manager *m) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering /* If there's currently no DNS server set, then the next

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (!m->current_dns_server)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering /* Change to the next one */

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (m->current_dns_server->servers_next) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering manager_set_dns_server(m, m->current_dns_server->servers_next);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering }

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering /* If there was no next one, then start from the beginning of

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering if (m->current_dns_server->type == DNS_SERVER_FALLBACK)

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering manager_set_dns_server(m, m->fallback_dns_servers);

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering else

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering manager_set_dns_server(m, m->dns_servers);

091a364c802e34a58f3260c9cb5db9b75c62215cTom Gundersen}

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poetteringuint32_t manager_find_mtu(Manager *m) {

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering uint32_t mtu = 0;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering Link *l;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering Iterator i;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering /* If we don't know on which link a DNS packet would be

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering HASHMAP_FOREACH(l, m->links, i) {

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering if (l->mtu <= 0)

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering continue;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering if (mtu <= 0 || l->mtu < mtu)

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering mtu = l->mtu;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering }

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering return mtu;

e1c959948c0e31d6997bcdfbabfbd077784b2baeLennart Poettering}

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringstatic int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering DnsTransaction *t = NULL;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering Manager *m = userdata;

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering DnsScope *scope;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering int r;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r <= 0)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return r;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering scope = manager_find_scope(m, p);

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering if (!scope) {

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering log_warning("Got LLMNR UDP packet on unknown scope. Ignoring.");

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering return 0;

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering }

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering if (dns_packet_validate_reply(p) > 0) {

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering log_debug("Got reply packet for id %u", DNS_PACKET_ID(p));

a2a416f768e2aa7db5b975cd50eb19237cac9cceLennart Poettering

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering dns_scope_check_conflicts(scope, p);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering if (t)

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering dns_transaction_process_reply(t, p);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering } else if (dns_packet_validate_query(p) > 0) {

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering log_debug("Got query packet for id %u", DNS_PACKET_ID(p));

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering dns_scope_process_query(scope, NULL, p);

623a4c97b9175f95c4b1c6fc34e36c56f1e4ddbfLennart Poettering } else

a407657425a3e47fd2b559cd3bc800f791303f63Lennart Poettering log_debug("Invalid LLMNR UDP packet.");

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return 0;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering}

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poetteringint manager_llmnr_ipv4_udp_fd(Manager *m) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering union sockaddr_union sa = {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering .in.sin_family = AF_INET,

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering .in.sin_port = htobe16(5355),

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering };

bf3f1271e2cc0c22b11c8a805a997578dabe9191Lennart Poettering static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering int r;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering assert(m);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (m->llmnr_ipv4_udp_fd >= 0)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return m->llmnr_ipv4_udp_fd;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (m->llmnr_ipv4_udp_fd < 0)

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering return -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

bf3f1271e2cc0c22b11c8a805a997578dabe9191Lennart Poettering /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */

bf3f1271e2cc0c22b11c8a805a997578dabe9191Lennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

bf3f1271e2cc0c22b11c8a805a997578dabe9191Lennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_LOOP, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_RECVTTL, &one, sizeof(one));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering /* Disable Don't-Fragment bit in the IP header */

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu));

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering if (r < 0) {

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = -errno;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering goto fail;

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering }

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering

1716f6dcf54d4c181c2e2558e3d5414f54c8d9caLennart Poettering r = bind(m->llmnr_ipv4_udp_fd, &sa.sa, sizeof(sa.in));