break;
case RTM_DELADDR:
- if (a)
- link_address_free(a);
+ link_address_free(a);
break;
}
return 0;
}
-static int determine_hostname(char **ret) {
+static int determine_hostname(char **llmnr_hostname, char **mdns_hostname) {
_cleanup_free_ char *h = NULL, *n = NULL;
- int r;
+ char label[DNS_LABEL_MAX];
+ const char *p;
+ int r, k;
- assert(ret);
+ assert(llmnr_hostname);
+ assert(mdns_hostname);
+
+ /* Extract and normalize the first label of the locally
+ * configured hostname, and check it's not "localhost". */
h = gethostname_malloc();
if (!h)
return log_oom();
- if (!utf8_is_valid(h)) {
+ p = h;
+ r = dns_label_unescape(&p, label, sizeof(label));
+ if (r < 0)
+ return log_error_errno(r, "Failed to unescape host name: %m");
+ if (r == 0) {
+ log_error("Couldn't find a single label in hosntame.");
+ return -EINVAL;
+ }
+
+ k = dns_label_undo_idna(label, r, label, sizeof(label));
+ if (k < 0)
+ return log_error_errno(k, "Failed to undo IDNA: %m");
+ if (k > 0)
+ r = k;
+
+ if (!utf8_is_valid(label)) {
log_error("System hostname is not UTF-8 clean.");
return -EINVAL;
}
- r = dns_name_normalize(h, &n);
- if (r < 0) {
- log_error("System hostname '%s' cannot be normalized.", h);
- return r;
+ r = dns_label_escape(label, r, &n);
+ if (r < 0)
+ return log_error_errno(r, "Failed to escape host name: %m");
+
+ if (is_localhost(n)) {
+ log_debug("System hostname is 'localhost', ignoring.");
+ return -EINVAL;
}
- *ret = n;
+ r = dns_name_concat(n, "local", mdns_hostname);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine mDNS hostname: %m");
+
+ *llmnr_hostname = n;
n = NULL;
return 0;
}
static int on_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
- _cleanup_free_ char *h = NULL;
+ _cleanup_free_ char *llmnr_hostname = NULL, *mdns_hostname = NULL;
Manager *m = userdata;
int r;
assert(m);
- r = determine_hostname(&h);
+ r = determine_hostname(&llmnr_hostname, &mdns_hostname);
if (r < 0)
return 0; /* ignore invalid hostnames */
- if (streq(h, m->hostname))
+ if (streq(llmnr_hostname, m->llmnr_hostname) && streq(mdns_hostname, m->mdns_hostname))
return 0;
- log_info("System hostname changed to '%s'.", h);
- free(m->hostname);
- m->hostname = h;
- h = NULL;
+ log_info("System hostname changed to '%s'.", llmnr_hostname);
+
+ free(m->llmnr_hostname);
+ free(m->mdns_hostname);
+
+ m->llmnr_hostname = llmnr_hostname;
+ m->mdns_hostname = mdns_hostname;
+
+ llmnr_hostname = mdns_hostname = NULL;
manager_refresh_rrs(m);
return log_error_errno(r, "Failed to add hostname event source: %m");
}
- r = determine_hostname(&m->hostname);
+ r = determine_hostname(&m->llmnr_hostname, &m->mdns_hostname);
if (r < 0) {
log_info("Defaulting to hostname 'linux'.");
- m->hostname = strdup("linux");
- if (!m->hostname)
+ m->llmnr_hostname = strdup("linux");
+ if (!m->llmnr_hostname)
+ return log_oom();
+
+ m->mdns_hostname = strdup("linux.local");
+ if (!m->mdns_hostname)
return log_oom();
} else
- log_info("Using system hostname '%s'.", m->hostname);
+ log_info("Using system hostname '%s'.", m->llmnr_hostname);
+
+ return 0;
+}
+
+static int manager_sigusr1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+ _cleanup_free_ char *buffer = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ Manager *m = userdata;
+ size_t size = 0;
+ DnsScope *scope;
+
+ assert(s);
+ assert(si);
+ assert(m);
+
+ f = open_memstream(&buffer, &size);
+ if (!f)
+ return log_oom();
+ LIST_FOREACH(scopes, scope, m->dns_scopes)
+ dns_scope_dump(scope, f);
+
+ if (fflush_and_check(f) < 0)
+ return log_oom();
+
+ log_dump(LOG_INFO, buffer);
return 0;
}
if (r < 0)
return r;
+ (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m);
+
*ret = m;
m = NULL;
sd_event_source_unref(m->bus_retry_event_source);
sd_bus_unref(m->bus);
+ sd_event_source_unref(m->sigusr1_event_source);
+
sd_event_unref(m->event);
- dns_resource_key_unref(m->host_ipv4_key);
- dns_resource_key_unref(m->host_ipv6_key);
+ dns_resource_key_unref(m->llmnr_host_ipv4_key);
+ dns_resource_key_unref(m->llmnr_host_ipv6_key);
- safe_close(m->hostname_fd);
sd_event_source_unref(m->hostname_event_source);
- free(m->hostname);
+ safe_close(m->hostname_fd);
+ free(m->llmnr_hostname);
+ free(m->mdns_hostname);
free(m);
}
if (fstat(fileno(f), &st) < 0) {
- log_error_errno(errno, "Failed to stat open file: %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to stat open file: %m");
goto clear;
}
assert(m);
- m->host_ipv4_key = dns_resource_key_unref(m->host_ipv4_key);
- m->host_ipv6_key = dns_resource_key_unref(m->host_ipv6_key);
+ m->llmnr_host_ipv4_key = dns_resource_key_unref(m->llmnr_host_ipv4_key);
+ m->llmnr_host_ipv6_key = dns_resource_key_unref(m->llmnr_host_ipv6_key);
HASHMAP_FOREACH(l, m->links, i) {
link_add_rrs(l, true);
int manager_next_hostname(Manager *m) {
const char *p;
uint64_t u, a;
- char *h;
+ char *h, *k;
+ int r;
assert(m);
- p = strchr(m->hostname, 0);
+ p = strchr(m->llmnr_hostname, 0);
assert(p);
- while (p > m->hostname) {
+ while (p > m->llmnr_hostname) {
if (!strchr("0123456789", p[-1]))
break;
random_bytes(&a, sizeof(a));
u += 1 + a % 10;
- if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->hostname), m->hostname, u) < 0)
+ if (asprintf(&h, "%.*s%" PRIu64, (int) (p - m->llmnr_hostname), m->llmnr_hostname, u) < 0)
return -ENOMEM;
- log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->hostname, h);
+ r = dns_name_concat(h, "local", &k);
+ if (r < 0) {
+ free(h);
+ return r;
+ }
+
+ log_info("Hostname conflict, changing published hostname from '%s' to '%s'.", m->llmnr_hostname, h);
- free(m->hostname);
- m->hostname = h;
+ free(m->llmnr_hostname);
+ m->llmnr_hostname = h;
+
+ free(m->mdns_hostname);
+ m->mdns_hostname = k;
manager_refresh_rrs(m);
}
}
+int manager_is_own_hostname(Manager *m, const char *name) {
+ int r;
+
+ assert(m);
+ assert(name);
+
+ if (m->llmnr_hostname) {
+ r = dns_name_equal(name, m->llmnr_hostname);
+ if (r != 0)
+ return r;
+ }
+
+ if (m->mdns_hostname)
+ return dns_name_equal(name, m->mdns_hostname);
+
+ return 0;
+}
+
static const char* const support_table[_SUPPORT_MAX] = {
[SUPPORT_NO] = "no",
[SUPPORT_YES] = "yes",
projects / thirdparty / systemd.git / blobdiff