139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include <arpa/inet.h>

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include <resolv.h>

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt#include <net/if.h>

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams#include <sys/ioctl.h>

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include <sys/poll.h>

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt#include <netinet/in.h>

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "rtnl-util.h"

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "event-util.h"

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

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "network-internal.h"

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt#include "conf-parser.h"

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "socket-util.h"

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "af-list.h"

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt#include "utf8.h"

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen#include "resolved-dns-domain.h"

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#include "resolved-conf.h"

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams#include "resolved-bus.h"

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams#include "resolved-manager.h"

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt#define SEND_TIMEOUT_USEC (200 * USEC_PER_MSEC)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flyktstatic int manager_process_link(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Manager *m = userdata;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt uint16_t type;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Link *l;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams int ifindex, r;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams assert(rtnl);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt assert(mm);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = sd_rtnl_message_get_type(mm, &type);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt goto fail;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = sd_rtnl_message_link_get_ifindex(mm, &ifindex);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt goto fail;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt l = hashmap_get(m->links, INT_TO_PTR(ifindex));

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt switch (type) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt case RTM_NEWLINK:{

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen bool is_new = !l;

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (!l) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = link_new(m, &l, ifindex);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt goto fail;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt }

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt r = link_update_rtnl(l, mm);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt goto fail;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (is_new)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_debug("Found new link %i/%s", ifindex, l->name);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt break;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt case RTM_DELLINK:

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (l) {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_debug("Removing link %i/%s", l->ifindex, l->name);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt link_free(l);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt break;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return 0;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktfail:

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt log_warning("Failed to process RTNL link message: %s", strerror(-r));

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktstatic int manager_process_address(sd_rtnl *rtnl, sd_rtnl_message *mm, void *userdata) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt Manager *m = userdata;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt union in_addr_union address;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt uint16_t type;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r, ifindex, family;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt LinkAddress *a;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt Link *l;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt assert(rtnl);

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt assert(mm);

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt assert(m);

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt r = sd_rtnl_message_get_type(mm, &type);

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt if (r < 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt goto fail;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = sd_rtnl_message_addr_get_ifindex(mm, &ifindex);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt goto fail;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt l = hashmap_get(m->links, INT_TO_PTR(ifindex));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (!l)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return 0;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = sd_rtnl_message_addr_get_family(mm, &family);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt goto fail;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt switch (family) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt case AF_INET:

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = sd_rtnl_message_read_in_addr(mm, IFA_LOCAL, &address.in);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = sd_rtnl_message_read_in_addr(mm, IFA_ADDRESS, &address.in);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0)

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams goto fail;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt break;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams case AF_INET6:

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams r = sd_rtnl_message_read_in6_addr(mm, IFA_LOCAL, &address.in6);

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams if (r < 0) {

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams r = sd_rtnl_message_read_in6_addr(mm, IFA_ADDRESS, &address.in6);

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams if (r < 0)

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams goto fail;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams break;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams default:

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams return 0;

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams }

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams a = link_find_address(l, family, &address);

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams

76253e73f9c9c24fec755e485516f3b55d0707b4Dan Williams switch (type) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt case RTM_NEWADDR:

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (!a) {

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller r = link_address_new(l, &a, family, &address);

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller if (r < 0)

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller return r;

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller }

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller r = link_address_update_rtnl(a, mm);

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller if (r < 0)

ebe207d4acf38165adbc45298662982eecdb9e9fTom Gundersen return r;

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams break;

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams case RTM_DELADDR:

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams if (a)

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams link_address_free(a);

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen break;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen }

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen return 0;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersenfail:

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen log_warning("Failed to process RTNL address message: %s", strerror(-r));

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen return 0;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen}

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersenstatic int manager_rtnl_listen(Manager *m) {

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen sd_rtnl_message *i;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen int r;

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen assert(m);

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen /* First, subscibe to interfaces coming and going */

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen if (r < 0)

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen return r;

fe4b2156256c5bdf52341576571ce9f095d9f085Tom Gundersen

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen r = sd_rtnl_attach_event(m->rtnl, m->event, 0);

ebe207d4acf38165adbc45298662982eecdb9e9fTom Gundersen if (r < 0)

764aad6258eec3bd4ae62ea341ea507bd69ce628Tom Gundersen return r;

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams r = sd_rtnl_add_match(m->rtnl, RTM_NEWLINK, manager_process_link, m);

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams if (r < 0)

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams return r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = sd_rtnl_add_match(m->rtnl, RTM_DELLINK, manager_process_link, m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (r < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = sd_rtnl_add_match(m->rtnl, RTM_NEWADDR, manager_process_address, m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (r < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = sd_rtnl_add_match(m->rtnl, RTM_DELADDR, manager_process_address, m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (r < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* Then, enumerate all links */

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = sd_rtnl_message_new_link(m->rtnl, &req, RTM_GETLINK, 0);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (r < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = sd_rtnl_message_request_dump(req, true);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = sd_rtnl_call(m->rtnl, req, 0, &reply);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt for (i = reply; i; i = sd_rtnl_message_next(i)) {

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = manager_process_link(m->rtnl, i, m);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt }

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt req = sd_rtnl_message_unref(req);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt reply = sd_rtnl_message_unref(reply);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt /* Finally, enumerate all addresses, too */

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, AF_UNSPEC);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = sd_rtnl_message_request_dump(req, true);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = sd_rtnl_call(m->rtnl, req, 0, &reply);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return r;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt for (i = reply; i; i = sd_rtnl_message_next(i)) {

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = manager_process_address(m->rtnl, i, m);

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt if (r < 0)

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt return r;

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt }

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt return r;

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt}

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flyktstatic int on_network_event(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt Manager *m = userdata;

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt Iterator i;

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt Link *l;

ea3b3a75abb3f8b853f7da454b9b8e258a120eeaPatrik Flykt int r;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt assert(m);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt sd_network_monitor_flush(m->network_monitor);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek HASHMAP_FOREACH(l, m->links, i) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = link_update_monitor(l);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0)

4e3e6679e8f73b83d38e4b20d8b025e12991d1cbPatrik Flykt log_warning("Failed to update monitor information for %i: %s", l->ifindex, strerror(-r));

4e3e6679e8f73b83d38e4b20d8b025e12991d1cbPatrik Flykt }

4e3e6679e8f73b83d38e4b20d8b025e12991d1cbPatrik Flykt

4e3e6679e8f73b83d38e4b20d8b025e12991d1cbPatrik Flykt r = manager_write_resolv_conf(m);

4e3e6679e8f73b83d38e4b20d8b025e12991d1cbPatrik Flykt if (r < 0)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_warning("Could not update resolv.conf: %s", strerror(-r));

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return 0;

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek}

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flyktstatic int manager_network_monitor_listen(Manager *m) {

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt int r, fd, events;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(m);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt r = sd_network_monitor_new(&m->network_monitor, NULL);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt if (r < 0)

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt return r;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt fd = sd_network_monitor_get_fd(m->network_monitor);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (fd < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return fd;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt events = sd_network_monitor_get_events(m->network_monitor);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (events < 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return events;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = sd_event_add_io(m->event, &m->network_event_source, fd, events, &on_network_event, m);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r < 0)

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt return r;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return 0;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt}

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flyktstatic int determine_hostname(char **ret) {

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt _cleanup_free_ char *h = NULL, *n = NULL;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt int r;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt assert(ret);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt h = gethostname_malloc();

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (!h)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return log_oom();

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (!utf8_is_valid(h)) {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_error("System hostname is not UTF-8 clean.");

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt return -EINVAL;

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt r = dns_name_normalize(h, &n);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r < 0) {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_error("System hostname '%s' cannot be normalized.", h);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return r;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt *ret = n;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt n = NULL;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return 0;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt}

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flyktstatic int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt _cleanup_free_ char *h = NULL;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt Manager *m = userdata;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt int r;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt assert(m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt r = determine_hostname(&h);

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt if (r < 0)

926695f1b5f9395eeb416cc2f478a9cf75fdbeb4Thomas Hindoe Paaboel Andersen return 0; /* ignore invalid hostnames */

926695f1b5f9395eeb416cc2f478a9cf75fdbeb4Thomas Hindoe Paaboel Andersen

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt if (streq(h, m->hostname))

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt return 0;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt log_info("System hostname changed to '%s'.", h);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt free(m->hostname);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt m->hostname = h;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt h = NULL;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt manager_refresh_rrs(m);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt return 0;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt}

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flyktstatic int manager_watch_hostname(Manager *m) {

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt int r;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt assert(m);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt if (m->hostname_fd < 0) {

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt log_warning("Failed to watch hostname: %m");

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt return 0;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt }

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt r = sd_event_add_io(m->event, &m->hostname_event_source, m->hostname_fd, 0, on_hostname_change, m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r < 0) {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r == -EPERM)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt /* kernels prior to 3.2 don't support polling this file. Ignore the failure. */

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt m->hostname_fd = safe_close(m->hostname_fd);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt else {

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt log_error("Failed to add hostname event source: %s", strerror(-r));

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt return r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt }

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt }

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt r = determine_hostname(&m->hostname);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r < 0) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt log_info("Defaulting to hostname 'linux'.");

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt m->hostname = strdup("linux");

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (!m->hostname)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return log_oom();

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt } else

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt log_info("Using system hostname '%s'.", m->hostname);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return 0;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt}

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Hallerstatic void manager_llmnr_stop(Manager *m) {

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt assert(m);

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt m->llmnr_ipv4_udp_event_source = sd_event_source_unref(m->llmnr_ipv4_udp_event_source);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt m->llmnr_ipv4_udp_fd = safe_close(m->llmnr_ipv4_udp_fd);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv6_udp_event_source = sd_event_source_unref(m->llmnr_ipv6_udp_event_source);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv6_udp_fd = safe_close(m->llmnr_ipv6_udp_fd);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv4_tcp_event_source = sd_event_source_unref(m->llmnr_ipv4_tcp_event_source);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv4_tcp_fd = safe_close(m->llmnr_ipv4_tcp_fd);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv6_tcp_event_source = sd_event_source_unref(m->llmnr_ipv6_tcp_event_source);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt m->llmnr_ipv6_tcp_fd = safe_close(m->llmnr_ipv6_tcp_fd);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt}

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flyktstatic int manager_llmnr_start(Manager *m) {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt int r;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt assert(m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (m->llmnr_support == SUPPORT_NO)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt return 0;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt r = manager_llmnr_ipv4_udp_fd(m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r == -EADDRINUSE)

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt goto eaddrinuse;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt if (r < 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return r;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt r = manager_llmnr_ipv6_udp_fd(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r == -EADDRINUSE)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt goto eaddrinuse;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r < 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return r;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt r = manager_llmnr_ipv4_tcp_fd(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r == -EADDRINUSE)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt goto eaddrinuse;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r < 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt r = manager_llmnr_ipv6_tcp_fd(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r == -EADDRINUSE)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt goto eaddrinuse;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r < 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return r;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return 0;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykteaddrinuse:

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt log_warning("There appears to be another LLMNR respondering running. Turning off LLMNR support.");

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt m->llmnr_support = SUPPORT_NO;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt manager_llmnr_stop(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return 0;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt}

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flyktint manager_new(Manager **ret) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt _cleanup_(manager_freep) Manager *m = NULL;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt int r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(ret);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt m = new0(Manager, 1);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (!m)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return -ENOMEM;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt m->dns_ipv4_fd = m->dns_ipv6_fd = -1;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt m->llmnr_ipv4_udp_fd = m->llmnr_ipv6_udp_fd = -1;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt m->llmnr_ipv4_tcp_fd = m->llmnr_ipv6_tcp_fd = -1;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt m->hostname_fd = -1;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt m->llmnr_support = SUPPORT_YES;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt m->read_resolv_conf = true;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt r = manager_parse_dns_server(m, DNS_SERVER_FALLBACK, DNS_SERVERS);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt r = sd_event_default(&m->event);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt if (r < 0)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt return r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_event_set_watchdog(m->event, true);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = manager_watch_hostname(m);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = dns_scope_new(m, &m->unicast_scope, NULL, DNS_PROTOCOL_DNS, AF_UNSPEC);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

4b4923e65423e60d755841b5b264730e8f3deab3Tom Gundersen

5e91345094a9e983e7abb2313334e7808bcd2cc2Tom Gundersen r = manager_network_monitor_listen(m);

513a6fa8679510ea1b55967bdb482dd5f8a39f21Ronny Chevalier if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = manager_rtnl_listen(m);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = manager_connect_bus(m);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt *ret = m;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt m = NULL;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return 0;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt}

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flyktint manager_start(Manager *m) {

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt int r;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt assert(m);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt r = manager_llmnr_start(m);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt if (r < 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return r;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return 0;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt}

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik FlyktManager *manager_free(Manager *m) {

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt Link *l;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt if (!m)

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt return NULL;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt while ((l = hashmap_first(m->links)))

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt link_free(l);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt while (m->dns_queries)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt dns_query_free(m->dns_queries);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt dns_scope_free(m->unicast_scope);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt while (m->dns_servers)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt dns_server_free(m->dns_servers);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt while (m->fallback_dns_servers)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt dns_server_free(m->fallback_dns_servers);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt hashmap_free(m->links);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt hashmap_free(m->dns_transactions);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt sd_event_source_unref(m->network_event_source);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt sd_network_monitor_unref(m->network_monitor);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt sd_event_source_unref(m->dns_ipv4_event_source);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt sd_event_source_unref(m->dns_ipv6_event_source);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt safe_close(m->dns_ipv4_fd);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt safe_close(m->dns_ipv6_fd);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt manager_llmnr_stop(m);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt sd_event_source_unref(m->bus_retry_event_source);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_bus_unref(m->bus);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_event_unref(m->event);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt dns_resource_key_unref(m->host_ipv4_key);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt dns_resource_key_unref(m->host_ipv6_key);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt safe_close(m->hostname_fd);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt sd_event_source_unref(m->hostname_event_source);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt free(m->hostname);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen free(m);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return NULL;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt}

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flyktint manager_read_resolv_conf(Manager *m) {

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt _cleanup_fclose_ FILE *f = NULL;

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt struct stat st, own;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt char line[LINE_MAX];

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt DnsServer *s, *nx;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt usec_t t;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt int r;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt assert(m);

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt /* Reads the system /etc/resolv.conf, if it exists and is not

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (!m->read_resolv_conf)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return 0;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = stat("/etc/resolv.conf", &st);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (r < 0) {

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (errno != ENOENT)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt log_warning("Failed to open /etc/resolv.conf: %m");

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = -errno;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt goto clear;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt }

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt /* Have we already seen the file? */

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt t = timespec_load(&st.st_mtim);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (t == m->resolv_conf_mtime)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return 0;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt m->resolv_conf_mtime = t;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt /* Is it symlinked to our own file? */

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (stat("/run/systemd/resolve/resolv.conf", &own) >= 0 &&

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt st.st_dev == own.st_dev &&

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt st.st_ino == own.st_ino) {

356779df90a2ecab5da2cb310ad0f8ebc9ca9f46Lennart Poettering r = 0;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen goto clear;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen }

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt f = fopen("/etc/resolv.conf", "re");

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (!f) {

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (errno != ENOENT)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt log_warning("Failed to open /etc/resolv.conf: %m");

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = -errno;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt goto clear;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt }

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (fstat(fileno(f), &st) < 0) {

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt log_error("Failed to stat open file: %m");

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt r = -errno;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt goto clear;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt }

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt LIST_FOREACH(servers, s, m->dns_servers)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt s->marked = true;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt FOREACH_LINE(line, f, r = -errno; goto clear) {

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen union in_addr_union address;

356779df90a2ecab5da2cb310ad0f8ebc9ca9f46Lennart Poettering int family;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen char *l;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen const char *a;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt truncate_nl(line);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt l = strstrip(line);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (*l == '#' || *l == ';')

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt continue;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt a = first_word(l, "nameserver");

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (!a)

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt continue;

cfb5b3805759e63dc5e0cae6e92e1df885b5c5b6Tom Gundersen

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt r = in_addr_from_string_auto(a, &family, &address);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt if (r < 0) {

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt log_warning("Failed to parse name server %s.", a);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt continue;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt }

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

cfb5b3805759e63dc5e0cae6e92e1df885b5c5b6Tom Gundersen LIST_FOREACH(servers, s, m->dns_servers)

cfb5b3805759e63dc5e0cae6e92e1df885b5c5b6Tom Gundersen if (s->family == family && in_addr_equal(family, &s->address, &address) > 0)

cfb5b3805759e63dc5e0cae6e92e1df885b5c5b6Tom Gundersen break;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt if (s)

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt s->marked = false;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt else {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = dns_server_new(m, NULL, DNS_SERVER_SYSTEM, NULL, family, &address);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto clear;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

44481a8b537839cd9ffead4d261491641f5b5260Zbigniew Jędrzejewski-Szmek }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt LIST_FOREACH_SAFE(servers, s, nx, m->dns_servers)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (s->marked)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt dns_server_free(s);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

44481a8b537839cd9ffead4d261491641f5b5260Zbigniew Jędrzejewski-Szmek return 0;

44481a8b537839cd9ffead4d261491641f5b5260Zbigniew Jędrzejewski-Szmek

44481a8b537839cd9ffead4d261491641f5b5260Zbigniew Jędrzejewski-Szmekclear:

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt while (m->dns_servers)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt dns_server_free(m->dns_servers);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktstatic void write_resolve_conf_server(DnsServer *s, FILE *f, unsigned *count) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt _cleanup_free_ char *t = NULL;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

66eac1201a9c1596f5901f8dbbf24bda7e350878Dan Williams assert(s);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt assert(f);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt assert(count);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = in_addr_to_string(s->family, &s->address, &t);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt log_warning("Invalid DNS address. Ignoring: %s", strerror(-r));

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (*count == MAXNS)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt fputs("# Too many DNS servers configured, the following entries may be ignored\n", f);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt fprintf(f, "nameserver %s\n", t);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt (*count) ++;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktint manager_write_resolv_conf(Manager *m) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt static const char path[] = "/run/systemd/resolve/resolv.conf";

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt _cleanup_free_ char *temp_path = NULL;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt _cleanup_fclose_ FILE *f = NULL;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt unsigned count = 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt DnsServer *s;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt Iterator i;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt Link *l;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt assert(m);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt /* Read the system /etc/resolv.conf first */

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt manager_read_resolv_conf(m);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = fopen_temporary(path, &f, &temp_path);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt fchmod(fileno(f), 0644);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt "# Third party programs must not access this file directly, but\n"

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt "# only through the symlink at /etc/resolv.conf. To manage\n"

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt "# resolv.conf(5) in a different way, replace the symlink by a\n"

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt "# static file or a different symlink.\n\n", f);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt LIST_FOREACH(servers, s, m->dns_servers)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt write_resolve_conf_server(s, f, &count);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt HASHMAP_FOREACH(l, m->links, i)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt LIST_FOREACH(servers, s, l->dns_servers)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt write_resolve_conf_server(s, f, &count);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (count == 0) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt LIST_FOREACH(servers, s, m->fallback_dns_servers)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt write_resolve_conf_server(s, f, &count);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt }

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = fflush_and_check(f);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto fail;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (rename(temp_path, path) < 0) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = -errno;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto fail;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktfail:

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt unlink(path);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt unlink(temp_path);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flyktint manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) {

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt union {

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt struct cmsghdr header; /* For alignment */

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt uint8_t buffer[CMSG_SPACE(MAX(sizeof(struct in_pktinfo), sizeof(struct in6_pktinfo)))

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt + CMSG_SPACE(int) /* ttl/hoplimit */

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt + EXTRA_CMSG_SPACE /* kernel appears to require extra buffer space */];

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt } control;

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt union sockaddr_union sa;

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt struct msghdr mh = {};

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt struct cmsghdr *cmsg;

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt struct iovec iov;

7bd8e95d44977833d0de3fc4e893eb3bc84351d6Patrik Flykt int ms = 0, r;

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt ssize_t l;

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt assert(m);

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt assert(fd >= 0);

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt assert(ret);

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt r = ioctl(fd, FIONREAD, &ms);

5da1b97f3c3d15521f2dcfbc18eccd6580122ebcPatrik Flykt if (r < 0)

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt return -errno;

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt if (ms < 0)

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt return -EIO;

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt r = dns_packet_new(&p, protocol, ms);

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt if (r < 0)

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt return r;

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt iov.iov_base = DNS_PACKET_DATA(p);

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt iov.iov_len = p->allocated;

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt mh.msg_name = &sa.sa;

41e4615d4f4f5c61afa84ba857f23c0ac496687bPatrik Flykt mh.msg_namelen = sizeof(sa);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt mh.msg_iov = &iov;

6599680e2d33597f0f11a99e1c3c957b42418568Patrik Flykt mh.msg_iovlen = 1;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt mh.msg_control = &control;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt mh.msg_controllen = sizeof(control);

c47e8936a43ce546e8a74fa569e9fbfae6c64be7Patrik Flykt

c47e8936a43ce546e8a74fa569e9fbfae6c64be7Patrik Flykt l = recvmsg(fd, &mh, 0);

c47e8936a43ce546e8a74fa569e9fbfae6c64be7Patrik Flykt if (l < 0) {

c47e8936a43ce546e8a74fa569e9fbfae6c64be7Patrik Flykt if (errno == EAGAIN || errno == EINTR)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return -errno;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (l <= 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return -EIO;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt assert(!(mh.msg_flags & MSG_CTRUNC));

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt assert(!(mh.msg_flags & MSG_TRUNC));

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->size = (size_t) l;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->family = sa.sa.sa_family;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->ipproto = IPPROTO_UDP;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (p->family == AF_INET) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt p->sender.in = sa.in.sin_addr;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt p->sender_port = be16toh(sa.in.sin_port);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt } else if (p->family == AF_INET6) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt p->sender.in6 = sa.in6.sin6_addr;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt p->sender_port = be16toh(sa.in6.sin6_port);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt p->ifindex = sa.in6.sin6_scope_id;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt } else

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt return -EAFNOSUPPORT;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (cmsg->cmsg_level == IPPROTO_IPV6) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(p->family == AF_INET6);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt switch (cmsg->cmsg_type) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt case IPV6_PKTINFO: {

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt struct in6_pktinfo *i = (struct in6_pktinfo*) CMSG_DATA(cmsg);

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt if (p->ifindex <= 0)

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt p->ifindex = i->ipi6_ifindex;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt p->destination.in6 = i->ipi6_addr;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt break;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt }

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt case IPV6_HOPLIMIT:

5364f729ba9616cd9fdab8d5413fbc25a1af3a57Lennart Poettering p->ttl = *(int *) CMSG_DATA(cmsg);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt break;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt }

9d89d1ae71cb298218e35a69d6b70e2c94de5271Patrik Flykt } else if (cmsg->cmsg_level == IPPROTO_IP) {

9d89d1ae71cb298218e35a69d6b70e2c94de5271Patrik Flykt assert(p->family == AF_INET);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt switch (cmsg->cmsg_type) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt case IP_PKTINFO: {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt struct in_pktinfo *i = (struct in_pktinfo*) CMSG_DATA(cmsg);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (p->ifindex <= 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->ifindex = i->ipi_ifindex;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->destination.in = i->ipi_addr;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt break;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt case IP_TTL:

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->ttl = *(int *) CMSG_DATA(cmsg);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt break;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt /* The Linux kernel sets the interface index to the loopback

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (p->ifindex > 0 && manager_ifindex_is_loopback(m, p->ifindex) != 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->ifindex = 0;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* If we don't know the interface index still, we look for the

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (p->ifindex <= 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p->ifindex = manager_find_ifindex(m, p->family, &p->destination);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt *ret = p;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt p = NULL;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt return 1;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktstatic int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt DnsTransaction *t = NULL;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt Manager *m = userdata;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r;

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = manager_recv(m, fd, DNS_PROTOCOL_DNS, &p);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r <= 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (dns_packet_validate_reply(p) > 0) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (!t)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt dns_transaction_process_reply(t, p);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt } else

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt log_debug("Invalid DNS packet.");

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return 0;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

6ec60d20724d2a32e20d25ef75d2af178c242bc2Ronny Chevalierint manager_dns_ipv4_fd(Manager *m) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt const int one = 1;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt assert(m);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (m->dns_ipv4_fd >= 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return m->dns_ipv4_fd;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt m->dns_ipv4_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (m->dns_ipv4_fd < 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return -errno;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = setsockopt(m->dns_ipv4_fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one));

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = -errno;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto fail;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = sd_event_add_io(m->event, &m->dns_ipv4_event_source, m->dns_ipv4_fd, EPOLLIN, on_dns_packet, m);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto fail;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return m->dns_ipv4_fd;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktfail:

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt m->dns_ipv4_fd = safe_close(m->dns_ipv4_fd);

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktint manager_dns_ipv6_fd(Manager *m) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt const int one = 1;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt int r;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt assert(m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (m->dns_ipv6_fd >= 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return m->dns_ipv6_fd;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt m->dns_ipv6_fd = socket(AF_INET6, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (m->dns_ipv6_fd < 0)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return -errno;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt r = setsockopt(m->dns_ipv6_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r < 0) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt r = -errno;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt goto fail;

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt }

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt r = sd_event_add_io(m->event, &m->dns_ipv6_event_source, m->dns_ipv6_fd, EPOLLIN, on_dns_packet, m);

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt if (r < 0)

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt goto fail;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

ed6ee21953dac9c78383da00bc4514ece6b75ab5Patrik Flykt return m->dns_ipv6_fd;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flyktfail:

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt m->dns_ipv6_fd = safe_close(m->dns_ipv6_fd);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt return r;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt}

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flyktstatic int sendmsg_loop(int fd, struct msghdr *mh, int flags) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt int r;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(fd >= 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(mh);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt for (;;) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (sendmsg(fd, mh, flags) >= 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return 0;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt if (errno == EINTR)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt continue;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (errno != EAGAIN)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return -errno;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt r = fd_wait_for_event(fd, POLLOUT, SEND_TIMEOUT_USEC);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (r < 0)

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return r;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt if (r == 0)

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt return -ETIMEDOUT;

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt }

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt}

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flyktstatic int manager_ipv4_send(Manager *m, int fd, int ifindex, const struct in_addr *addr, uint16_t port, DnsPacket *p) {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt union sockaddr_union sa = {

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt .in.sin_family = AF_INET,

631bbe71298ec892f77f44f94feb612646fe6853Patrik Flykt };

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt union {

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt struct cmsghdr header; /* For alignment */

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt uint8_t buffer[CMSG_SPACE(sizeof(struct in_pktinfo))];

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt } control;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt struct msghdr mh = {};

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt struct iovec iov;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(m);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(fd >= 0);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(addr);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(port > 0);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(p);

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt iov.iov_base = DNS_PACKET_DATA(p);

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt iov.iov_len = p->size;

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt sa.in.sin_addr = *addr;

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt sa.in.sin_port = htobe16(port),

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt mh.msg_iov = &iov;

38a03f06a7393d2721c23f23f0589d2f6d0904afLennart Poettering mh.msg_iovlen = 1;

38a03f06a7393d2721c23f23f0589d2f6d0904afLennart Poettering mh.msg_name = &sa.sa;

38a03f06a7393d2721c23f23f0589d2f6d0904afLennart Poettering mh.msg_namelen = sizeof(sa.in);

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt if (ifindex > 0) {

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt struct cmsghdr *cmsg;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt struct in_pktinfo *pi;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt zero(control);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt mh.msg_control = &control;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen mh.msg_controllen = CMSG_LEN(sizeof(struct in_pktinfo));

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt cmsg = CMSG_FIRSTHDR(&mh);

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt cmsg->cmsg_len = mh.msg_controllen;

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt cmsg->cmsg_level = IPPROTO_IP;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt cmsg->cmsg_type = IP_PKTINFO;

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt pi = (struct in_pktinfo*) CMSG_DATA(cmsg);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt pi->ipi_ifindex = ifindex;

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt }

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return sendmsg_loop(fd, &mh, 0);

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt}

7246333cb803b03440d3bd0bdaa233564d09b5aePatrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flyktstatic int manager_ipv6_send(Manager *m, int fd, int ifindex, const struct in6_addr *addr, uint16_t port, DnsPacket *p) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt union sockaddr_union sa = {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt .in6.sin6_family = AF_INET6,

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt };

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt union {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt struct cmsghdr header; /* For alignment */

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt uint8_t buffer[CMSG_SPACE(sizeof(struct in6_pktinfo))];

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt } control;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt struct msghdr mh = {};

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt struct iovec iov;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(fd >= 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(addr);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(port > 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(p);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt iov.iov_base = DNS_PACKET_DATA(p);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt iov.iov_len = p->size;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt sa.in6.sin6_addr = *addr;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt sa.in6.sin6_port = htobe16(port),

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt sa.in6.sin6_scope_id = ifindex;

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt mh.msg_iov = &iov;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt mh.msg_iovlen = 1;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt mh.msg_name = &sa.sa;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt mh.msg_namelen = sizeof(sa.in6);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt if (ifindex > 0) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt struct cmsghdr *cmsg;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt struct in6_pktinfo *pi;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt zero(control);

356779df90a2ecab5da2cb310ad0f8ebc9ca9f46Lennart Poettering

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen mh.msg_control = &control;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen mh.msg_controllen = CMSG_LEN(sizeof(struct in6_pktinfo));

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt cmsg = CMSG_FIRSTHDR(&mh);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt cmsg->cmsg_len = mh.msg_controllen;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt cmsg->cmsg_level = IPPROTO_IPV6;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt cmsg->cmsg_type = IPV6_PKTINFO;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt pi = (struct in6_pktinfo*) CMSG_DATA(cmsg);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt pi->ipi6_ifindex = ifindex;

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt }

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen return sendmsg_loop(fd, &mh, 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt}

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flyktint manager_send(Manager *m, int fd, int ifindex, int family, const union in_addr_union *addr, uint16_t port, DnsPacket *p) {

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(m);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(fd >= 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(addr);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(port > 0);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt assert(p);

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt 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));

356779df90a2ecab5da2cb310ad0f8ebc9ca9f46Lennart Poettering

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen if (family == AF_INET)

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p);

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen else if (family == AF_INET6)

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p);

3dc34fcc97b41f8b7b019027225b121dfbb9871dPatrik Flykt

a34b57c0d43b8bf819ccd4f62c314b41b625454dPatrik Flykt return -EAFNOSUPPORT;

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik Flykt}

a9aff3615b430f86bd0a824214d95f634efaf894Patrik Flykt

c3e2adeaba8e043caed0ef139eeaea016bd152d0Patrik FlyktDnsServer* manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {

346e13a25dc6f76d3bc9d8decd40dc4782b02d2aPatrik Flykt DnsServer *s;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt assert(m);

fa94c34b083b5b4019975624453e53d0cbad2a5dTom Gundersen assert(in_addr);

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt LIST_FOREACH(servers, s, m->dns_servers)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return s;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt LIST_FOREACH(servers, s, m->fallback_dns_servers)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt return s;

d1b0afe3653b4316a6361d204169620726d468a0Patrik Flykt

356779df90a2ecab5da2cb310ad0f8ebc9ca9f46Lennart Poettering return NULL;

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen}

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom Gundersen

9021bb9f935c93b516b10c88db2a212a9e3a8140Tom GundersenDnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(m);

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt if (m->current_dns_server == s)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return s;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (s) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt _cleanup_free_ char *ip = NULL;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt in_addr_to_string(s->family, &s->address, &ip);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt log_info("Switching to system DNS server %s.", strna(ip));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt m->current_dns_server = s;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (m->unicast_scope)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt dns_cache_flush(&m->unicast_scope->cache);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return s;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt}

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek

f12abb48fc510b8b349c05e35ba048134debaf25Patrik FlyktDnsServer *manager_get_dns_server(Manager *m) {

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt Link *l;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt assert(m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* Try to read updates resolv.conf */

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt manager_read_resolv_conf(m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller if (!m->current_dns_server)

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller manager_set_dns_server(m, m->dns_servers);

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller

cc22955cfefb4bd6e7a135f1ec95fb5a07ba9ce3Thomas Haller if (!m->current_dns_server) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt bool found = false;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt Iterator i;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* No DNS servers configured, let's see if there are

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt HASHMAP_FOREACH(l, m->links, i)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (l->dns_servers) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt found = true;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt break;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt }

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (!found)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt manager_set_dns_server(m, m->fallback_dns_servers);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt }

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return m->current_dns_server;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt}

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flyktvoid manager_next_dns_server(Manager *m) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt assert(m);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* If there's currently no DNS server set, then the next

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (!m->current_dns_server)

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt /* Change to the next one */

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt if (m->current_dns_server->servers_next) {

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt manager_set_dns_server(m, m->current_dns_server->servers_next);

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt return;

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt }

bbfa43ca37df0718287c25a8e39ee7477ebf33f6Patrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt /* If there was no next one, then start from the beginning of

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (m->current_dns_server->type == DNS_SERVER_FALLBACK)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt manager_set_dns_server(m, m->fallback_dns_servers);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt else

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt manager_set_dns_server(m, m->dns_servers);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt}

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flyktuint32_t manager_find_mtu(Manager *m) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt uint32_t mtu = 0;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Link *l;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Iterator i;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt /* If we don't know on which link a DNS packet would be

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt HASHMAP_FOREACH(l, m->links, i) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (l->mtu <= 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt continue;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (mtu <= 0 || l->mtu < mtu)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt mtu = l->mtu;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return mtu;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt}

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flyktstatic int on_llmnr_packet(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt _cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt DnsTransaction *t = NULL;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Manager *m = userdata;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt int r;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = manager_recv(m, fd, DNS_PROTOCOL_LLMNR, &p);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (r <= 0)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return r;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (dns_packet_validate_reply(p) > 0) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt log_debug("Got reply packet for id %u", DNS_PACKET_ID(p));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt t = hashmap_get(m->dns_transactions, UINT_TO_PTR(DNS_PACKET_ID(p)));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (!t)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return 0;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt dns_transaction_process_reply(t, p);

f0c4b1c3fd827b429ba36aa45fd39e0a023cbf2cTom Gundersen

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek } else if (dns_packet_validate_query(p) > 0) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt Link *l;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

62e3d1aed512d68cab1fc9b509e813a1fa2b3790Lennart Poettering l = hashmap_get(m->links, INT_TO_PTR(p->ifindex));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (l) {

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt DnsScope *scope = NULL;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (p->family == AF_INET)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt scope = l->llmnr_ipv4_scope;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt else if (p->family == AF_INET6)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt scope = l->llmnr_ipv6_scope;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt if (scope)

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt dns_scope_process_query(scope, NULL, p);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt } else

3f0c075f8ef3344da5a6bda524540201f9204e61Patrik Flykt log_debug("Invalid LLMNR packet.");

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt return 0;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt}

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flyktint manager_llmnr_ipv4_udp_fd(Manager *m) {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt union sockaddr_union sa = {

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt .in.sin_family = AF_INET,

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt .in.sin_port = htobe16(5355),

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt };

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt static const int one = 1, pmtu = IP_PMTUDISC_DONT, ttl = 255;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt int r;

f12abb48fc510b8b349c05e35ba048134debaf25Patrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt assert(m);

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek if (m->llmnr_ipv4_udp_fd >= 0)

c806ffb9592fa9a2b13a1f9f9be4c77cd5b211aaZbigniew Jędrzejewski-Szmek return m->llmnr_ipv4_udp_fd;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt m->llmnr_ipv4_udp_fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (m->llmnr_ipv4_udp_fd < 0)

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt return -errno;

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt /* RFC 4795, section 2.5 recommends setting the TTL of UDP packets to 255. */

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt if (r < 0) {

da6fe470e17fa02f3adedc779585caf8669252bdPatrik Flykt r = -errno;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt goto fail;

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt }

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt r = setsockopt(m->llmnr_ipv4_udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl));

139b011ab81ccea1d51f09e0261a1c390115c6ffPatrik Flykt 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;

}

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = setsockopt(m->llmnr_ipv6_udp_fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &one, sizeof(one));

if (r < 0) {

r = -errno;

goto fail;

}

r = bind(m->llmnr_ipv6_udp_fd, &sa.sa, sizeof(sa.in6));

if (r < 0) {

r = -errno;

goto fail;

}

r = sd_event_add_io(m->event, &m->llmnr_ipv6_udp_event_source, m->llmnr_ipv6_udp_fd, EPOLLIN, on_llmnr_packet, m);

if (r < 0) {

r = -errno;

goto fail;

}

return m->llmnr_ipv6_udp_fd;

fail:

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

return r;