along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <arpa/inet.h>
#include <resolv.h>
-#include <net/if.h>
#include <sys/ioctl.h>
-#include <sys/poll.h>
+#include <poll.h>
#include <netinet/in.h>
#include "rtnl-util.h"
-#include "event-util.h"
-#include "network-util.h"
#include "network-internal.h"
-#include "conf-parser.h"
#include "socket-util.h"
#include "af-list.h"
#include "utf8.h"
+#include "fileio-label.h"
+#include "ordered-set.h"
+#include "random-util.h"
+#include "hostname-util.h"
-#include "resolved-dns-domain.h"
+#include "dns-domain.h"
#include "resolved-conf.h"
#include "resolved-bus.h"
#include "resolved-manager.h"
return 0;
fail:
- log_warning("Failed to process RTNL link message: %s", strerror(-r));
+ log_warning_errno(r, "Failed to process RTNL link message: %m");
return 0;
}
return 0;
fail:
- log_warning("Failed to process RTNL address message: %s", strerror(-r));
+ log_warning_errno(r, "Failed to process RTNL address message: %m");
return 0;
}
assert(m);
- /* First, subscibe to interfaces coming and going */
- r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR, RTNLGRP_IPV6_IFADDR);
+ /* First, subscribe to interfaces coming and going */
+ r = sd_rtnl_open(&m->rtnl);
if (r < 0)
return r;
HASHMAP_FOREACH(l, m->links, i) {
r = link_update_monitor(l);
if (r < 0)
- log_warning("Failed to update monitor information for %i: %s", l->ifindex, strerror(-r));
+ 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("Could not update resolv.conf: %s", strerror(-r));
+ log_warning_errno(r, "Could not update resolv.conf: %m");
return 0;
}
m->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);
if (m->hostname_fd < 0) {
- log_warning("Failed to watch hostname: %m");
+ log_warning_errno(errno, "Failed to watch hostname: %m");
return 0;
}
if (r == -EPERM)
/* kernels prior to 3.2 don't support polling this file. Ignore the failure. */
m->hostname_fd = safe_close(m->hostname_fd);
- else {
- log_error("Failed to add hostname event source: %s", strerror(-r));
- return r;
- }
+ else
+ return log_error_errno(r, "Failed to add hostname event source: %m");
}
r = determine_hostname(&m->hostname);
while (m->dns_queries)
dns_query_free(m->dns_queries);
- dns_scope_free(m->unicast_scope);
-
manager_flush_dns_servers(m, DNS_SERVER_SYSTEM);
manager_flush_dns_servers(m, DNS_SERVER_FALLBACK);
+ dns_scope_free(m->unicast_scope);
+
hashmap_free(m->links);
hashmap_free(m->dns_transactions);
r = stat("/etc/resolv.conf", &st);
if (r < 0) {
if (errno != ENOENT)
- log_warning("Failed to open /etc/resolv.conf: %m");
+ log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");
r = -errno;
goto clear;
}
f = fopen("/etc/resolv.conf", "re");
if (!f) {
if (errno != ENOENT)
- log_warning("Failed to open /etc/resolv.conf: %m");
+ log_warning_errno(errno, "Failed to open /etc/resolv.conf: %m");
r = -errno;
goto clear;
}
if (fstat(fileno(f), &st) < 0) {
- log_error("Failed to stat open file: %m");
+ log_error_errno(errno, "Failed to stat open file: %m");
r = -errno;
goto clear;
}
if (s->marked)
dns_server_free(s);
+ /* Whenever /etc/resolv.conf changes, start using the first
+ * DNS server of it. This is useful to deal with broken
+ * network managing implementations (like NetworkManager),
+ * that when connecting to a VPN place both the VPN DNS
+ * servers and the local ones in /etc/resolv.conf. Without
+ * resetting the DNS server to use back to the first entry we
+ * will continue to use the local one thus being unable to
+ * resolve VPN domains. */
+ manager_set_dns_server(m, m->dns_servers);
+
return 0;
clear:
r = in_addr_to_string(s->family, &s->address, &t);
if (r < 0) {
- log_warning("Invalid DNS address. Ignoring: %s", strerror(-r));
+ log_warning_errno(r, "Invalid DNS address. Ignoring: %m");
return;
}
(*count) ++;
}
-static void write_resolv_conf_search(const char *domain, FILE *f,
- unsigned *count, unsigned *length) {
+static void write_resolv_conf_search(
+ const char *domain, FILE *f,
+ unsigned *count,
+ unsigned *length) {
+
assert(domain);
assert(f);
assert(length);
(*count) ++;
}
+static int write_resolv_conf_contents(FILE *f, OrderedSet *dns, OrderedSet *domains) {
+ Iterator i;
+
+ fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"
+ "# Third party programs must not access this file directly, but\n"
+ "# only through the symlink at /etc/resolv.conf. To manage\n"
+ "# resolv.conf(5) in a different way, replace the symlink by a\n"
+ "# static file or a different symlink.\n\n", f);
+
+ if (ordered_set_isempty(dns))
+ fputs("# No DNS servers known.\n", f);
+ else {
+ DnsServer *s;
+ unsigned count = 0;
+
+ ORDERED_SET_FOREACH(s, dns, i)
+ write_resolv_conf_server(s, f, &count);
+ }
+
+ if (!ordered_set_isempty(domains)) {
+ unsigned length = 0, count = 0;
+ char *domain;
+
+ fputs("search", f);
+ ORDERED_SET_FOREACH(domain, domains, i)
+ write_resolv_conf_search(domain, f, &count, &length);
+ fputs("\n", f);
+ }
+
+ return fflush_and_check(f);
+}
+
int manager_write_resolv_conf(Manager *m) {
static const char path[] = "/run/systemd/resolve/resolv.conf";
_cleanup_free_ char *temp_path = NULL;
_cleanup_fclose_ FILE *f = NULL;
- _cleanup_set_free_ Set *dns = NULL, *domains = NULL;
- unsigned count = 0;
+ _cleanup_ordered_set_free_ OrderedSet *dns = NULL, *domains = NULL;
DnsServer *s;
Iterator i;
Link *l;
manager_read_resolv_conf(m);
/* Add the full list to a set, to filter out duplicates */
- dns = set_new(dns_server_hash_func, dns_server_compare_func);
+ dns = ordered_set_new(&dns_server_hash_ops);
if (!dns)
return -ENOMEM;
- domains = set_new(dns_name_hash_func, dns_name_compare_func);
+ domains = ordered_set_new(&dns_name_hash_ops);
if (!domains)
return -ENOMEM;
/* First add the system-wide servers */
LIST_FOREACH(servers, s, m->dns_servers) {
- r = set_put(dns, s);
+ r = ordered_set_put(dns, s);
if (r == -EEXIST)
continue;
if (r < 0)
char **domain;
LIST_FOREACH(servers, s, l->dns_servers) {
- r = set_put(dns, s);
+ r = ordered_set_put(dns, s);
if (r == -EEXIST)
continue;
if (r < 0)
continue;
STRV_FOREACH(domain, l->unicast_scope->domains) {
- r = set_put(domains, *domain);
+ r = ordered_set_put(domains, *domain);
if (r == -EEXIST)
continue;
if (r < 0)
}
/* If we found nothing, add the fallback servers */
- if (set_isempty(dns)) {
+ if (ordered_set_isempty(dns)) {
LIST_FOREACH(servers, s, m->fallback_dns_servers) {
- r = set_put(dns, s);
+ r = ordered_set_put(dns, s);
if (r == -EEXIST)
continue;
if (r < 0)
}
}
- r = fopen_temporary(path, &f, &temp_path);
+ r = fopen_temporary_label(path, path, &f, &temp_path);
if (r < 0)
return r;
fchmod(fileno(f), 0644);
- fputs("# This file is managed by systemd-resolved(8). Do not edit.\n#\n"
- "# Third party programs must not access this file directly, but\n"
- "# only through the symlink at /etc/resolv.conf. To manage\n"
- "# resolv.conf(5) in a different way, replace the symlink by a\n"
- "# static file or a different symlink.\n\n", f);
-
- if (set_isempty(dns))
- fputs("# No DNS servers known.\n", f);
- else {
- SET_FOREACH(s, dns, i)
- write_resolv_conf_server(s, f, &count);
- }
-
- if (!set_isempty(domains)) {
- unsigned length = 0;
- char *domain;
-
- count = 0;
-
- fputs("search", f);
- SET_FOREACH(domain, domains, i)
- write_resolv_conf_search(domain, f, &count, &length);
- fputs("\n", f);
- }
-
- r = fflush_and_check(f);
+ r = write_resolv_conf_contents(f, dns, domains);
if (r < 0)
goto fail;
return 0;
fail:
- unlink(path);
- unlink(temp_path);
+ (void) unlink(path);
+ (void) unlink(temp_path);
return r;
}
} else
return -EAFNOSUPPORT;
- for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) {
+ CMSG_FOREACH(cmsg, &mh) {
if (cmsg->cmsg_level == IPPROTO_IPV6) {
assert(p->family == AF_INET6);
* device if the packet came from the local host since it
* avoids the routing table in such a case. Let's unset the
* interface index in such a case. */
- if (p->ifindex > 0 && manager_ifindex_is_loopback(m, p->ifindex) != 0)
+ if (p->ifindex == LOOPBACK_IFINDEX)
p->ifindex = 0;
/* If we don't know the interface index still, we look for the
return r;
}
-/* lo having ifindex 1 is hardcoded in the kernel */
-#define LOOPBACK_IFINDEX 1
-
-int manager_ifindex_is_loopback(Manager *m, int ifindex) {
- Link *l;
- assert(m);
-
- if (ifindex <= 0)
- return -EINVAL;
-
- l = hashmap_get(m->links, INT_TO_PTR(ifindex));
- if (!l)
- /* in case we don't yet track the link, rely on the hardcoded value */
- return ifindex == LOOPBACK_IFINDEX;
- else if (l->flags & IFF_LOOPBACK)
- return 1;
-
- return 0;
-}
-
int manager_find_ifindex(Manager *m, int family, const union in_addr_union *in_addr) {
LinkAddress *a;
projects / thirdparty / systemd.git / blobdiff