74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

b5efdb8af40ea759a1ea584c1bc44ecc81dd00ceLennart Poettering#include <arpa/inet.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <resolv.h>

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering#include <net/if.h>

b5efdb8af40ea759a1ea584c1bc44ecc81dd00ceLennart Poettering#include <sys/ioctl.h>

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include <sys/poll.h>

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering#include <netinet/in.h>

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen#include "rtnl-util.h"

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen#include "event-util.h"

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen#include "network-util.h"

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen#include "network-internal.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "conf-parser.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "socket-util.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "af-list.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "utf8.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "resolved-dns-domain.h"

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen#include "resolved-conf.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "resolved-bus.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "resolved-manager.h"

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poetteringstatic int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

3c0cf502796be355431d4a64d738e75f543aa51dLennart Poettering Manager *m = userdata;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering uint16_t type;

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering int ifindex, r;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering assert(rtnl);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(mm);

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering r = sd_rtnl_message_get_type(mm, &type);

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering if (r < 0)

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering goto fail;

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering if (r < 0)

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering goto fail;

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering l = hashmap_get(m->links, INT_TO_PTR(ifindex));

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering switch (type) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering case RTM_NEWLINK:{

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering bool is_new = !l;

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (!l) {

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering r = link_new(m, &l, ifindex);

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering if (r < 0)

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen goto fail;

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen }

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

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

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = link_update_monitor(l);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering goto fail;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering if (is_new)

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering log_debug("Found new link %i/%s", ifindex, l->name);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering break;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering }

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering case RTM_DELLINK:

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (l) {

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering log_debug("Removing link %i/%s", l->ifindex, l->name);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering link_free(l);

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering }

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering break;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering }

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering return 0;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringfail:

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering log_warning("Failed to process RTNL link message: %s", strerror(-r));

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering return 0;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering}

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poetteringstatic int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering Manager *m = userdata;

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering union in_addr_union address;

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering uint16_t type;

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering int r, ifindex, family;

4e945a6f7971fd7d1f6b2c62ee3afdaff3c95ce4Lennart Poettering LinkAddress *a;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering Link *l;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(rtnl);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(mm);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering assert(m);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen r = sd_rtnl_message_get_type(mm, &type);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen if (r < 0)

cab5b05903096e1c9cf5575ccc73f89d15c8db69Lennart Poettering goto fail;

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen l = hashmap_get(m->links, INT_TO_PTR(ifindex));

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen if (!l)

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering return 0;

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen r = sd_rtnl_message_addr_get_family(mm, &family);

3e684349c2cead2e6fd2f816c34eb17daba23a49Lennart Poettering if (r < 0)

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering goto fail;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen switch (family) {

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering case AF_INET:

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_read_in_addr(mm, IFA_LOCAL, &address.in);

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering if (r < 0) {

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering r = sd_rtnl_message_read_in_addr(mm, IFA_ADDRESS, &address.in);

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering if (r < 0)

74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering goto fail;

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering }

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering break;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen case AF_INET6:

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering r = sd_rtnl_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering if (r < 0) {

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering r = sd_rtnl_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen if (r < 0)

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering goto fail;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering }

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering break;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering default:

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering return 0;

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering }

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering a = link_find_address(l, family, &address);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering switch (type) {

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering case RTM_NEWADDR:

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering if (!a) {

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering r = link_address_new(l, &a, family, &address);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering if (r < 0)

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering return r;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering }

eed857b71702f8551b46b66b31fa0d08583cf23cLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering r = link_address_update_rtnl(a, mm);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering if (r < 0)

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering return r;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering break;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering case RTM_DELADDR:

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering if (a)

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering link_address_free(a);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering break;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering }

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen return 0;

91b14d6ff362b938a72db17b095ee9903d07381bTom Gundersen

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poetteringfail:

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering log_warning("Failed to process RTNL address message: %s", strerror(-r));

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return 0;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering}

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poetteringstatic int manager_rtnl_listen(Manager *m) {

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering sd_rtnl_message *i;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering int r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering assert(m);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering /* First, subscibe to interfaces coming and going */

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_attach_event(m->rtnl, m->event, 0);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering /* Then, enumerate all links */

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering if (r < 0)

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering return r;

0b58db658b5c3f586ac3a837427f1f7fec2abb2eLennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_rtnl_message_request_dump(req, true);

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen if (r < 0)

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen return r;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_rtnl_call(m->rtnl, req, 0, &reply);

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poettering if (r < 0)

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering for (i = reply; i; i = sd_rtnl_message_next(i)) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = manager_process_link(m->rtnl, i, m);

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering if (r < 0)

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen return r;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen }

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering req = sd_rtnl_message_unref(req);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering reply = sd_rtnl_message_unref(reply);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering /* Finally, enumerate all addresses, too */

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering if (r < 0)

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return r;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_rtnl_message_request_dump(req, true);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering if (r < 0)

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering return r;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering r = sd_rtnl_call(m->rtnl, req, 0, &reply);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering if (r < 0)

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering return r;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering for (i = reply; i; i = sd_rtnl_message_next(i)) {

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering r = manager_process_address(m->rtnl, i, m);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering if (r < 0)

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return r;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering }

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return r;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering}

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poetteringstatic int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering Manager *m = userdata;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering Iterator i;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering Link *l;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering int r;

84129d46cd6e95e142973da93aede4c7433c9600Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering assert(m);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen sd_network_monitor_flush(m->network_monitor);

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen HASHMAP_FOREACH(l, m->links, i) {

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = link_update_monitor(l);

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen if (r < 0)

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen log_warning("Failed to update monitor information for %i: %s", l->ifindex, strerror(-r));

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen }

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

efd46a696d31097c38f653b36921e00c4df62319Lennart Poettering r = manager_write_resolv_conf(m);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen if (r < 0)

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen log_warning("Could not update resolv.conf: %s", strerror(-r));

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return 0;

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen}

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersenstatic int manager_network_monitor_listen(Manager *m) {

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering int r, fd, events;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering assert(m);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_network_monitor_new(&m->network_monitor, NULL);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering if (r < 0)

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen return r;

84129d46cd6e95e142973da93aede4c7433c9600Lennart Poettering

84129d46cd6e95e142973da93aede4c7433c9600Lennart Poettering fd = sd_network_monitor_get_fd(m->network_monitor);

84129d46cd6e95e142973da93aede4c7433c9600Lennart Poettering if (fd < 0)

84129d46cd6e95e142973da93aede4c7433c9600Lennart Poettering return fd;

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen

9df3ba6c6cb65eecec06f39dfe85a3596cedac4eTom Gundersen events = sd_network_monitor_get_events(m->network_monitor);

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering if (events < 0)

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen return events;

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering if (r < 0)

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering return r;

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen return 0;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering}

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poetteringstatic int determine_hostname(char **ret) {

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering _cleanup_free_ char *h = NULL, *n = NULL;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering int r;

571370c1555d2aa697733479a50957aff024bbcbLennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering assert(ret);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering h = gethostname_malloc();

571370c1555d2aa697733479a50957aff024bbcbLennart Poettering if (!h)

571370c1555d2aa697733479a50957aff024bbcbLennart Poettering return log_oom();

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen if (!utf8_is_valid(h)) {

4e0b8b17a7465653f4e7b819dad5f8e30d64c0c4Tom Gundersen log_error("System hostname is not UTF-8 clean.");

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return -EINVAL;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering }

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = dns_name_normalize(h, &n);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering log_error("System hostname '%s' cannot be normalized.", h);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering return r;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering }

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering *ret = n;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering n = NULL;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return 0;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering}

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poettering

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poetteringstatic int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering _cleanup_free_ char *h = NULL;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering Manager *m = userdata;

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poettering int r;

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering assert(m);

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering

b64513580ce627578351b76a502455e7bc62cae4Lennart Poettering r = determine_hostname(&h);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0)

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poettering return 0; /* ignore invalid hostnames */

b652d4a2099d1c167584dcc1d179d47c58dc38a2Lennart Poettering

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen if (streq(h, m->hostname))

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen return 0;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen log_info("System hostname changed to '%s'.", h);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen free(m->hostname);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen m->hostname = h;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen h = NULL;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen manager_refresh_rrs(m);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen return 0;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen}

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersenstatic int manager_watch_hostname(Manager *m) {

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen int r;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen assert(m);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);

011842775f750711833526d5bba1b818713947f5Lennart Poettering if (m->hostname_fd < 0) {

011842775f750711833526d5bba1b818713947f5Lennart Poettering log_warning("Failed to watch hostname: %m");

011842775f750711833526d5bba1b818713947f5Lennart Poettering return 0;

011842775f750711833526d5bba1b818713947f5Lennart Poettering }

011842775f750711833526d5bba1b818713947f5Lennart Poettering

011842775f750711833526d5bba1b818713947f5Lennart Poettering r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);

011842775f750711833526d5bba1b818713947f5Lennart Poettering if (r < 0) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r == -EPERM)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */

011842775f750711833526d5bba1b818713947f5Lennart Poettering m->hostname_fd = safe_close(m->hostname_fd);

011842775f750711833526d5bba1b818713947f5Lennart Poettering else {

011842775f750711833526d5bba1b818713947f5Lennart Poettering log_error("Failed to add hostname event source: %s", strerror(-r));

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering return r;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen }

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen }

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen r = determine_hostname(&m->hostname);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen if (r < 0) {

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering log_info("Defaulting to hostname 'linux'.");

011842775f750711833526d5bba1b818713947f5Lennart Poettering m->hostname = strdup("linux");

011842775f750711833526d5bba1b818713947f5Lennart Poettering if (!m->hostname)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return log_oom();

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering } else

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering log_info("Using system hostname '%s'.", m->hostname);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering return 0;

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering}

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poetteringstatic void manager_llmnr_stop(Manager *m) {

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen assert(m);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);

6a1a5eec43892dee3ff6e208bceb1931c25c782eLennart Poettering m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering}

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poetteringstatic int manager_llmnr_start(Manager *m) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering int r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

6a1a5eec43892dee3ff6e208bceb1931c25c782eLennart Poettering assert(m);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (m->llmnr_support == SUPPORT_NO)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return 0;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = manager_llmnr_ipv4_udp_fd(m);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r == -EADDRINUSE)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering goto eaddrinuse;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = manager_llmnr_ipv4_tcp_fd(m);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r == -EADDRINUSE)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering goto eaddrinuse;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (socket_ipv6_is_supported()) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = manager_llmnr_ipv6_udp_fd(m);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r == -EADDRINUSE)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering goto eaddrinuse;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering r = manager_llmnr_ipv6_tcp_fd(m);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r == -EADDRINUSE)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering goto eaddrinuse;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering if (r < 0)

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering }

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return 0;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poetteringeaddrinuse:

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering log_warning("There appears to be another LLMNR respondering running. Turning off LLMNR support.");

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_support = SUPPORT_NO;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering manager_llmnr_stop(m);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return 0;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering}

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poetteringint manager_new(Manager **ret) {

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering _cleanup_(manager_freep) Manager *m = NULL;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering int r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering assert(ret);

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering m = new0(Manager, 1);

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering if (!m)

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering return -ENOMEM;

011842775f750711833526d5bba1b818713947f5Lennart Poettering

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering m->dns_ipv4_fd = m->dns_ipv6_fd = -1;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering m->hostname_fd = -1;

6bb2c08597c999c429e889cd2403b2fef5f3e1a0Lennart Poettering

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen m->llmnr_support = SUPPORT_YES;

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen m->read_resolv_conf = true;

f4461e5641d53f27d6e76e0607bdaa9c0c58c1f6Lennart Poettering

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen r = manager_parse_dns_server(m, DNS_SERVER_FALLBACK, DNS_SERVERS);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = sd_event_default(&m->event);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering sd_event_set_watchdog(m->event, true);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = manager_watch_hostname(m);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = manager_network_monitor_listen(m);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = manager_rtnl_listen(m);

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering if (r < 0)

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering return r;

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering

519ef04651b07a547f010d6462603669d7fde4e5Lennart Poettering r = manager_connect_bus(m);

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering if (r < 0)

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering return r;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering *ret = m;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering m = NULL;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering return 0;

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering}

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poetteringint manager_start(Manager *m) {

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering int r;

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering assert(m);

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering r = manager_llmnr_start(m);

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering if (r < 0)

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering return r;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering return 0;

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering}

de54e62b4bd7856fb897c9a2ee93cc228adb2135Lennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart PoetteringManager *manager_free(Manager *m) {

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering Link *l;

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering if (!m)

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering return NULL;

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering while ((l = hashmap_first(m->links)))

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering link_free(l);

92ec902aad1ade7acbe50efd7b8ef87fbdc63af3Lennart Poettering

b826ab586c9e0a9c0d438a75c28cf3a8ab485929Tom Gundersen while (m->dns_queries)

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering dns_query_free(m->dns_queries);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

b826ab586c9e0a9c0d438a75c28cf3a8ab485929Tom Gundersen dns_scope_free(m->unicast_scope);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

b826ab586c9e0a9c0d438a75c28cf3a8ab485929Tom Gundersen manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);

b826ab586c9e0a9c0d438a75c28cf3a8ab485929Tom Gundersen manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering hashmap_free(m->links);

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt hashmap_free(m->dns_transactions);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering sd_event_source_unref(m->network_event_source);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering sd_network_monitor_unref(m->network_monitor);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering sd_event_source_unref(m->dns_ipv4_event_source);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering sd_event_source_unref(m->dns_ipv6_event_source);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering safe_close(m->dns_ipv4_fd);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering safe_close(m->dns_ipv6_fd);

87f5a19343acf8ba697acc5a62bdb1a2b8c9eda3Lennart Poettering

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt manager_llmnr_stop(m);

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt sd_bus_slot_unref(m->prepare_for_sleep_slot);

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt sd_event_source_unref(m->bus_retry_event_source);

d5099efc47d4e6ac60816b5381a5f607ab03f06eMichal Schmidt sd_bus_unref(m->bus);

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering sd_event_unref(m->event);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering dns_resource_key_unref(m->host_ipv4_key);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering dns_resource_key_unref(m->host_ipv6_key);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering safe_close(m->hostname_fd);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering sd_event_source_unref(m->hostname_event_source);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering free(m->hostname);

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering free(m);

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering return NULL;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering}

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poetteringint manager_read_resolv_conf(Manager *m) {

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering _cleanup_fclose_ FILE *f = NULL;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering struct stat st, own;

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering char line[LINE_MAX];

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering DnsServer *s, *nx;

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering usec_t t;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering int r;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering assert(m);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering /* Reads the system /etc/resolv.conf, if it exists and is not

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering if (!m->read_resolv_conf)

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering return 0;

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering r = stat("/etc/resolv.conf", &st);

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering if (r < 0) {

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering if (errno != ENOENT)

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering log_warning("Failed to open /etc/resolv.conf: %m");

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering r = -errno;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering goto clear;

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering }

636e813dc98ea40c58c6c85bc5e7e3c9f0904ea2Lennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering /* Have we already seen the file? */

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering t = timespec_load(&st.st_mtim);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (t == m->resolv_conf_mtime)

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering return 0;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering m->resolv_conf_mtime = t;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering /* Is it symlinked to our own file? */

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (stat("/run/systemd/resolve/resolv.conf", &own) >= 0 &&

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering st.st_dev == own.st_dev &&

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering st.st_ino == own.st_ino) {

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering r = 0;

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering goto clear;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering f = fopen("/etc/resolv.conf", "re");

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering if (!f) {

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering if (errno != ENOENT)

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering log_warning("Failed to open /etc/resolv.conf: %m");

4b95f1798f22c1bb75295f448188560cb6ec9eceLennart Poettering r = -errno;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering goto clear;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (fstat(fileno(f), &st) < 0) {

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering log_error("Failed to stat open file: %m");

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering r = -errno;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering goto clear;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering

6cb08a8930bdaca950b152b1e8b82466ed59511cLennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering s->marked = true;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering FOREACH_LINE(line, f, r = -errno; goto clear) {

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering union in_addr_union address;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering int family;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering char *l;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering const char *a;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering truncate_nl(line);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering l = strstrip(line);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (*l == '#' || *l == ';')

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering continue;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering a = first_word(l, "nameserver");

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (!a)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering continue;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering r = in_addr_from_string_auto(a, &family, &address);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (r < 0) {

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering log_warning("Failed to parse name server %s.", a);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering continue;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering LIST_FOREACH(servers, s, m->dns_servers)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (s->family == family && in_addr_equal(family, &s->address, &address) > 0)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering break;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (s)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering s->marked = false;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering else {

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &address);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (r < 0)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering goto clear;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (s->marked)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering dns_server_free(s);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering return 0;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poetteringclear:

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering while (m->dns_servers)

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering dns_server_free(m->dns_servers);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering return r;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering}

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poetteringstatic void write_resolve_conf_server(DnsServer *s, FILE *f, unsigned *count) {

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering _cleanup_free_ char *t = NULL;

0eac462399c8e87bcce252cf058eba9f2678f2bdLennart Poettering int r;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering assert(s);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering assert(f);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering assert(count);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering r = in_addr_to_string(s->family, &s->address, &t);

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering if (r < 0) {

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering log_warning("Invalid DNS address. Ignoring: %s", strerror(-r));

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering return;

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering }

f2f1dbe50fea13abadc9c1e845a29031b90b40f3Lennart Poettering

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen if (*count == MAXNS)

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen fputs("# Too many DNS servers configured, the following entries may be ignored.\n", f);

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen fprintf(f, "nameserver %s\n", t);

9c5e12a4314e7192e834e1b855e5e80111e636a6Tom Gundersen (*count) ++;

7586f4d172dd9c3ccc3126fc47dca9e49adec132Tom Gundersen}

d74fb368b18f0fbd9a4fe6f15691bbea7f3c4a01Tom Gundersen

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersenint manager_write_resolv_conf(Manager *m) {

be808ea083fa07271116b4519c3c27fd20c5f077Tom Gundersen static const char path[] = "/run/systemd/resolve/resolv.conf";

_cleanup_free_ char *temp_path = NULL;

_cleanup_fclose_ FILE *f = NULL;

_cleanup_set_free_ Set *dns = NULL;

unsigned count = 0;

DnsServer *s;

Iterator i;

Link *l;

int r;

assert(m);

/* Read the system /etc/resolv.conf first */

manager_read_resolv_conf(m);

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

dns = set_new(dns_server_hash_func, dns_server_compare_func);

if (!dns)

return -ENOMEM;

/* First add the system-wide servers */

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

r = set_put(dns, s);

if (r == -EEXIST)

continue;

if (r < 0)

return r;

}

/* Then, add the per-link servers */

HASHMAP_FOREACH(l, m->links, i)

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

r = set_put(dns, s);

if (r == -EEXIST)

continue;

if (r < 0)

return r;

}

/* If we found nothing, add the fallback servers */

if (set_isempty(dns)) {

LIST_FOREACH(servers, s, m->fallback_dns_servers) {

r = set_put(dns, s);

if (r == -EEXIST)

continue;

if (r < 0)

return r;

}

}

r = fopen_temporary(path, &f, &temp_path);

if (r < 0)

return r;

fchmod(fileno(f), 0644);

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

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

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

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

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

if (set_isempty(dns))

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

else {

SET_FOREACH(s, dns, i)

write_resolve_conf_server(s, f, &count);

}

r = fflush_and_check(f);

if (r < 0)

goto fail;

if (rename(temp_path, path) < 0) {

r = -errno;

goto fail;

}

return 0;

fail:

unlink(path);

unlink(temp_path);

return r;

}

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

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

union {

struct cmsghdr header; /* For alignment */

uint8_t buffer[CMSG_SPACE(MAX(sizeof(struct in_pktinfo), sizeof(struct in6_pktinfo)))

+ CMSG_SPACE(int) /* ttl/hoplimit */

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

} control;

union sockaddr_union sa;

struct msghdr mh = {};

struct cmsghdr *cmsg;

struct iovec iov;

int ms = 0, r;

ssize_t l;

assert(m);

assert(fd >= 0);

assert(ret);

r = ioctl(fd, FIONREAD, &ms);

if (r < 0)

return -errno;

if (ms < 0)

return -EIO;

r = dns_packet_new(&p, protocol, ms);

if (r < 0)

return r;

iov.iov_base = DNS_PACKET_DATA(p);

iov.iov_len = p->allocated;

mh.msg_name = &sa.sa;

mh.msg_namelen = sizeof(sa);

mh.msg_iov = &iov;

mh.msg_iovlen = 1;

mh.msg_control = &control;

mh.msg_controllen = sizeof(control);

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

if (l < 0) {

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

return 0;

return -errno;

}

if (l <= 0)

return -EIO;

assert(!(mh.msg_flags & MSG_CTRUNC));

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

p->size = (size_t) l;

p->family = sa.sa.sa_family;

p->ipproto = IPPROTO_UDP;

if (p->family == AF_INET) {

p->sender.in = sa.in.sin_addr;

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

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

p->sender.in6 = sa.in6.sin6_addr;

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

p->ifindex = sa.in6.sin6_scope_id;

} else

return -EAFNOSUPPORT;

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

if (cmsg->cmsg_level == IPPROTO_IPV6) {

assert(p->family == AF_INET6);

switch (cmsg->cmsg_type) {

case IPV6_PKTINFO: {

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

if (p->ifindex <= 0)

p->ifindex = i->ipi6_ifindex;

p->destination.in6 = i->ipi6_addr;

break;

}

case IPV6_HOPLIMIT:

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

break;

}

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

assert(p->family == AF_INET);

switch (cmsg->cmsg_type) {

case IP_PKTINFO: {

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

if (p->ifindex <= 0)

p->ifindex = i->ipi_ifindex;

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

break;

}

case IP_TTL:

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

break;

}

}

}

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

if (p->ifindex > 0 && manager_ifindex_is_loopback(m, p->ifindex) != 0)

p->ifindex = 0;

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

if (p->ifindex <= 0)

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

*ret = p;

p = NULL;

return 1;

}

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

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

DnsTransaction *t = NULL;

Manager *m = userdata;

int r;

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

if (r <= 0)

return r;

if (dns_packet_validate_reply(p) > 0) {

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

if (!t)

return 0;

dns_transaction_process_reply(t, p);

} else

log_debug("Invalid DNS packet.");

return 0;

}

int manager_dns_ipv4_fd(Manager *m) {

const int one = 1;

int r;

assert(m);

if (m->dns_ipv4_fd >= 0)

return m->dns_ipv4_fd;

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

if (m->dns_ipv4_fd < 0)

return -errno;

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0)

goto fail;

return m->dns_ipv4_fd;

fail:

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

return r;

}

int manager_dns_ipv6_fd(Manager *m) {

const int one = 1;

int r;

assert(m);

if (m->dns_ipv6_fd >= 0)

return m->dns_ipv6_fd;

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

if (m->dns_ipv6_fd < 0)

return -errno;

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0)

goto fail;

return m->dns_ipv6_fd;

fail:

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

return r;

}

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

int r;

assert(fd >= 0);

assert(mh);

for (;;) {

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

return 0;

if (errno == EINTR)

continue;

if (errno != EAGAIN)

return -errno;

r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);

if (r < 0)

return r;

if (r == 0)

return -ETIMEDOUT;

}

}

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

union sockaddr_union sa = {

.in.sin_family = AF_INET,

};

union {

struct cmsghdr header; /* For alignment */

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

} control;

struct msghdr mh = {};

struct iovec iov;

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

iov.iov_base = DNS_PACKET_DATA(p);

iov.iov_len = p->size;

sa.in.sin_addr = *addr;

sa.in.sin_port = htobe16(port),

mh.msg_iov = &iov;

mh.msg_iovlen = 1;

mh.msg_name = &sa.sa;

mh.msg_namelen = sizeof(sa.in);

if (ifindex > 0) {

struct cmsghdr *cmsg;

struct in_pktinfo *pi;

zero(control);

mh.msg_control = &control;

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

cmsg = CMSG_FIRSTHDR(&mh);

cmsg->cmsg_len = mh.msg_controllen;

cmsg->cmsg_level = IPPROTO_IP;

cmsg->cmsg_type = IP_PKTINFO;

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

pi->ipi_ifindex = ifindex;

}

return sendmsg_loop(fd, &mh, 0);

}

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

union sockaddr_union sa = {

.in6.sin6_family = AF_INET6,

};

union {

struct cmsghdr header; /* For alignment */

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

} control;

struct msghdr mh = {};

struct iovec iov;

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

iov.iov_base = DNS_PACKET_DATA(p);

iov.iov_len = p->size;

sa.in6.sin6_addr = *addr;

sa.in6.sin6_port = htobe16(port),

sa.in6.sin6_scope_id = ifindex;

mh.msg_iov = &iov;

mh.msg_iovlen = 1;

mh.msg_name = &sa.sa;

mh.msg_namelen = sizeof(sa.in6);

if (ifindex > 0) {

struct cmsghdr *cmsg;

struct in6_pktinfo *pi;

zero(control);

mh.msg_control = &control;

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

cmsg = CMSG_FIRSTHDR(&mh);

cmsg->cmsg_len = mh.msg_controllen;

cmsg->cmsg_level = IPPROTO_IPV6;

cmsg->cmsg_type = IPV6_PKTINFO;

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

pi->ipi6_ifindex = ifindex;

}

return sendmsg_loop(fd, &mh, 0);

}

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

assert(m);

assert(fd >= 0);

assert(addr);

assert(port > 0);

assert(p);

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

if (family == AF_INET)

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

else if (family == AF_INET6)

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

return -EAFNOSUPPORT;

}

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

DnsServer *s;

assert(m);

assert(in_addr);

LIST_FOREACH(servers, s, m->dns_servers)

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

return s;

LIST_FOREACH(servers, s, m->fallback_dns_servers)

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

return s;

return NULL;

}

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

assert(m);

if (m->current_dns_server == s)

return s;

if (s) {

_cleanup_free_ char *ip = NULL;

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

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

}

m->current_dns_server = s;

if (m->unicast_scope)

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

return s;

}

DnsServer *manager_get_dns_server(Manager *m) {

Link *l;

assert(m);

/* Try to read updates resolv.conf */

manager_read_resolv_conf(m);

if (!m->current_dns_server)

manager_set_dns_server(m, m->dns_servers);

if (!m->current_dns_server) {

bool found = false;

Iterator i;

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

HASHMAP_FOREACH(l, m->links, i)

if (l->dns_servers) {

found = true;

break;

}

if (!found)

manager_set_dns_server(m, m->fallback_dns_servers);

}

return m->current_dns_server;

}

void manager_next_dns_server(Manager *m) {

assert(m);

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

if (!m->current_dns_server)

return;

/* Change to the next one */

if (m->current_dns_server->servers_next) {

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

return;

}

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

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

manager_set_dns_server(m, m->fallback_dns_servers);

else

manager_set_dns_server(m, m->dns_servers);

}

uint32_t manager_find_mtu(Manager *m) {

uint32_t mtu = 0;

Link *l;

Iterator i;

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

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

if (l->mtu <= 0)

continue;

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

mtu = l->mtu;

}

return mtu;

}

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

_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

DnsTransaction *t = NULL;

Manager *m = userdata;

DnsScope *scope;

int r;

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

if (r <= 0)

return r;

scope = manager_find_scope(m, p);

if (!scope) {

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

return 0;

}

if (dns_packet_validate_reply(p) > 0) {

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

dns_scope_check_conflicts(scope, p);

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

if (t)

dns_transaction_process_reply(t, p);

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

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

dns_scope_process_query(scope, NULL, p);

} else

log_debug("Invalid LLMNR UDP packet.");

return 0;

}

int manager_llmnr_ipv4_udp_fd(Manager *m) {

union sockaddr_union sa = {

.in.sin_family = AF_INET,

.in.sin_port = htobe16(5355),

};

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

int r;

assert(m);

if (m->llmnr_ipv4_udp_fd >= 0)

return m->llmnr_ipv4_udp_fd;

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

if (m->llmnr_ipv4_udp_fd < 0)

return -errno;

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

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

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

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

if (r < 0) {

r = -errno;

goto fail;

}

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

if (r < 0) {

r = -errno;

goto fail;

}

r = sd_event_add_io(m->event, &m->llmnr_ipv4_udp_event_source, m->llmnr_ipv4_udp_fd, EPOLLIN, on_llmnr_packet, m);

if (r < 0)

goto fail;

return m->llmnr_ipv4_udp_fd;

fail:

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

return r;

}

int manager_llmnr_ipv6_udp_fd(Manager *m) {

union sockaddr_union sa = {

.in6.sin6_family = AF_INET6,

.in6.sin6_port = htobe16(5355),

};

static const int one = 1, ttl = 255;

int r;

assert(m);

if (m->llmnr_ipv6_udp_fd >= 0)

return m->llmnr_ipv6_udp_fd;

m->llmnr_ipv6_udp_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

if (m->llmnr_ipv6_udp_fd < 0)

return -errno;

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof(ttl));

if (r < 0) {

r = -errno;

goto fail;

}

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

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &ttl, sizeof(ttl));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv6_udp_fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}