X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=src%2Fresolve%2Fresolved-manager.c;h=e8811fa1d8e30e19720a025312763748d228ba33;hb=2a3900d7e484faefb14fd868d5c17ae2e7b2f21f;hp=a2677f442aec2ae1df726f8fb6cbbed3dc7094d8;hpb=089627141998d69d1e2e05bcbeb366af3db7a449;p=thirdparty%2Fsystemd.git diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c index a2677f442ae..e8811fa1d8e 100644 --- a/src/resolve/resolved-manager.c +++ b/src/resolve/resolved-manager.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -25,6 +23,7 @@ #include "af-list.h" #include "alloc-util.h" +#include "dirent-util.h" #include "dns-domain.h" #include "fd-util.h" #include "fileio-label.h" @@ -37,10 +36,11 @@ #include "random-util.h" #include "resolved-bus.h" #include "resolved-conf.h" +#include "resolved-etc-hosts.h" #include "resolved-llmnr.h" #include "resolved-manager.h" -#include "resolved-resolv-conf.h" #include "resolved-mdns.h" +#include "resolved-resolv-conf.h" #include "socket-util.h" #include "string-table.h" #include "string-util.h" @@ -79,11 +79,11 @@ static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void * goto fail; } - r = link_update_rtnl(l, mm); + r = link_process_rtnl(l, mm); if (r < 0) goto fail; - r = link_update_monitor(l); + r = link_update(l); if (r < 0) goto fail; @@ -96,6 +96,7 @@ static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void * case RTM_DELLINK: if (l) { log_debug("Removing link %i/%s", l->ifindex, l->name); + link_remove_user(l); link_free(l); } @@ -205,7 +206,7 @@ static int manager_rtnl_listen(Manager *m) { if (r < 0) return r; - r = sd_netlink_attach_event(m->rtnl, m->event, 0); + r = sd_netlink_attach_event(m->rtnl, m->event, SD_EVENT_PRIORITY_IMPORTANT); if (r < 0) return r; @@ -280,14 +281,12 @@ static int on_network_event(sd_event_source *s, int fd, uint32_t revents, void * sd_network_monitor_flush(m->network_monitor); HASHMAP_FOREACH(l, m->links, i) { - r = link_update_monitor(l); + r = link_update(l); if (r < 0) log_warning_errno(r, "Failed to update monitor information for %i: %m", l->ifindex); } - r = manager_write_resolv_conf(m); - if (r < 0) - log_warning_errno(r, "Could not update resolv.conf: %m"); + (void) manager_write_resolv_conf(m); return 0; } @@ -313,6 +312,12 @@ static int manager_network_monitor_listen(Manager *m) { if (r < 0) return r; + r = sd_event_source_set_priority(m->network_event_source, SD_EVENT_PRIORITY_IMPORTANT+5); + if (r < 0) + return r; + + (void) sd_event_source_set_description(m->network_event_source, "network-monitor"); + return 0; } @@ -420,6 +425,8 @@ static int manager_watch_hostname(Manager *m) { return log_error_errno(r, "Failed to add hostname event source: %m"); } + (void) sd_event_source_set_description(m->hostname_event_source, "hostname"); + r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname); if (r < 0) { log_info("Defaulting to hostname 'linux'."); @@ -461,6 +468,18 @@ static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si return 0; } +static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { + Manager *m = userdata; + + assert(s); + assert(si); + assert(m); + + manager_flush_caches(m); + + return 0; +} + int manager_new(Manager **ret) { _cleanup_(manager_freep) Manager *m = NULL; int r; @@ -476,14 +495,21 @@ int manager_new(Manager **ret) { m->mdns_ipv4_fd = m->mdns_ipv6_fd = -1; m->hostname_fd = -1; - m->llmnr_support = SUPPORT_YES; + m->llmnr_support = RESOLVE_SUPPORT_YES; + m->mdns_support = RESOLVE_SUPPORT_NO; + m->dnssec_mode = DEFAULT_DNSSEC_MODE; m->read_resolv_conf = true; m->need_builtin_fallbacks = true; + m->etc_hosts_last = m->etc_hosts_mtime = USEC_INFINITY; r = dns_trust_anchor_load(&m->trust_anchor); if (r < 0) return r; + r = manager_parse_config_file(m); + if (r < 0) + return r; + r = sd_event_default(&m->event); if (r < 0) return r; @@ -514,6 +540,9 @@ int manager_new(Manager **ret) { return r; (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m); + (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m); + + manager_cleanup_saved_user(m); *ret = m; m = NULL; @@ -572,6 +601,7 @@ Manager *manager_free(Manager *m) { sd_bus_unref(m->bus); sd_event_source_unref(m->sigusr1_event_source); + sd_event_source_unref(m->sigusr2_event_source); sd_event_unref(m->event); @@ -584,6 +614,7 @@ Manager *manager_free(Manager *m) { free(m->mdns_hostname); dns_trust_anchor_flush(&m->trust_anchor); + manager_etc_hosts_flush(m); free(m); @@ -602,18 +633,16 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { struct msghdr mh = {}; struct cmsghdr *cmsg; struct iovec iov; - int ms = 0, r; - ssize_t l; + ssize_t ms, l; + int r; assert(m); assert(fd >= 0); assert(ret); - r = ioctl(fd, FIONREAD, &ms); - if (r < 0) - return -errno; + ms = next_datagram_size_fd(fd); if (ms < 0) - return -EIO; + return ms; r = dns_packet_new(&p, protocol, ms); if (r < 0) @@ -630,6 +659,8 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { mh.msg_controllen = sizeof(control); l = recvmsg(fd, &mh, 0); + if (l == 0) + return 0; if (l < 0) { if (errno == EAGAIN || errno == EINTR) return 0; @@ -637,9 +668,6 @@ int manager_recv(Manager *m, int fd, DnsProtocol protocol, DnsPacket **ret) { return -errno; } - if (l <= 0) - return -EIO; - assert(!(mh.msg_flags & MSG_CTRUNC)); assert(!(mh.msg_flags & MSG_TRUNC)); @@ -772,7 +800,7 @@ static int write_loop(int fd, void *message, size_t length) { int manager_write(Manager *m, int fd, DnsPacket *p) { int r; - log_debug("Sending %s packet with id %u", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); + log_debug("Sending %s packet with id %" PRIu16 ".", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p)); r = write_loop(fd, DNS_PACKET_DATA(p), p->size); if (r < 0) @@ -887,11 +915,11 @@ int manager_send(Manager *m, int fd, int ifindex, int family, const union in_add assert(port > 0); assert(p); - log_debug("Sending %s packet with id %u on interface %i/%s", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p), ifindex, af_to_name(family)); + log_debug("Sending %s packet with id %" PRIu16 " on interface %i/%s.", DNS_PACKET_QR(p) ? "response" : "query", DNS_PACKET_ID(p), ifindex, af_to_name(family)); if (family == AF_INET) return manager_ipv4_send(m, fd, ifindex, &addr->in, port, p); - else if (family == AF_INET6) + if (family == AF_INET6) return manager_ipv6_send(m, fd, ifindex, &addr->in6, port, p); return -EAFNOSUPPORT; @@ -1129,7 +1157,7 @@ int manager_compile_dns_servers(Manager *m, OrderedSet **dns) { return 0; } -int manager_compile_search_domains(Manager *m, OrderedSet **domains) { +int manager_compile_search_domains(Manager *m, OrderedSet **domains, int filter_route) { DnsSearchDomain *d; Iterator i; Link *l; @@ -1143,6 +1171,11 @@ int manager_compile_search_domains(Manager *m, OrderedSet **domains) { return r; LIST_FOREACH(domains, d, m->search_domains) { + + if (filter_route >= 0 && + d->route_only != !!filter_route) + continue; + r = ordered_set_put(*domains, d->name); if (r == -EEXIST) continue; @@ -1153,6 +1186,11 @@ int manager_compile_search_domains(Manager *m, OrderedSet **domains) { HASHMAP_FOREACH(l, m->links, i) { LIST_FOREACH(domains, d, l->search_domains) { + + if (filter_route >= 0 && + d->route_only != !!filter_route) + continue; + r = ordered_set_put(*domains, d->name); if (r == -EEXIST) continue; @@ -1164,9 +1202,129 @@ int manager_compile_search_domains(Manager *m, OrderedSet **domains) { return 0; } -static const char* const support_table[_SUPPORT_MAX] = { - [SUPPORT_NO] = "no", - [SUPPORT_YES] = "yes", - [SUPPORT_RESOLVE] = "resolve", -}; -DEFINE_STRING_TABLE_LOOKUP(support, Support); +DnssecMode manager_get_dnssec_mode(Manager *m) { + assert(m); + + if (m->dnssec_mode != _DNSSEC_MODE_INVALID) + return m->dnssec_mode; + + return DNSSEC_NO; +} + +bool manager_dnssec_supported(Manager *m) { + DnsServer *server; + Iterator i; + Link *l; + + assert(m); + + if (manager_get_dnssec_mode(m) == DNSSEC_NO) + return false; + + server = manager_get_dns_server(m); + if (server && !dns_server_dnssec_supported(server)) + return false; + + HASHMAP_FOREACH(l, m->links, i) + if (!link_dnssec_supported(l)) + return false; + + return true; +} + +void manager_dnssec_verdict(Manager *m, DnssecVerdict verdict, const DnsResourceKey *key) { + + assert(verdict >= 0); + assert(verdict < _DNSSEC_VERDICT_MAX); + + if (log_get_max_level() >= LOG_DEBUG) { + char s[DNS_RESOURCE_KEY_STRING_MAX]; + + log_debug("Found verdict for lookup %s: %s", + dns_resource_key_to_string(key, s, sizeof s), + dnssec_verdict_to_string(verdict)); + } + + m->n_dnssec_verdict[verdict]++; +} + +bool manager_routable(Manager *m, int family) { + Iterator i; + Link *l; + + assert(m); + + /* Returns true if the host has at least one interface with a routable address of the specified type */ + + HASHMAP_FOREACH(l, m->links, i) + if (link_relevant(l, family, false)) + return true; + + return false; +} + +void manager_flush_caches(Manager *m) { + DnsScope *scope; + + assert(m); + + LIST_FOREACH(scopes, scope, m->dns_scopes) + dns_cache_flush(&scope->cache); + + log_info("Flushed all caches."); +} + +void manager_cleanup_saved_user(Manager *m) { + _cleanup_closedir_ DIR *d = NULL; + struct dirent *de; + int r; + + assert(m); + + /* Clean up all saved per-link files in /run/systemd/resolve/netif/ that don't have a matching interface + * anymore. These files are created to persist settings pushed in by the user via the bus, so that resolved can + * be restarted without losing this data. */ + + d = opendir("/run/systemd/resolve/netif/"); + if (!d) { + if (errno == ENOENT) + return; + + log_warning_errno(errno, "Failed to open interface directory: %m"); + return; + } + + FOREACH_DIRENT_ALL(de, d, log_error_errno(errno, "Failed to read interface directory: %m")) { + _cleanup_free_ char *p = NULL; + int ifindex; + Link *l; + + if (!IN_SET(de->d_type, DT_UNKNOWN, DT_REG)) + continue; + + if (STR_IN_SET(de->d_name, ".", "..")) + continue; + + r = parse_ifindex(de->d_name, &ifindex); + if (r < 0) /* Probably some temporary file from a previous run. Delete it */ + goto rm; + + l = hashmap_get(m->links, INT_TO_PTR(ifindex)); + if (!l) /* link vanished */ + goto rm; + + if (l->is_managed) /* now managed by networkd, hence the bus settings are useless */ + goto rm; + + continue; + + rm: + p = strappend("/run/systemd/resolve/netif/", de->d_name); + if (!p) { + log_oom(); + return; + } + + (void) unlink(p); + } +}