summaryrefslogtreecommitdiff
path: root/src/shared/socket-label.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/shared/socket-label.c')
-rw-r--r--src/shared/socket-label.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/src/shared/socket-label.c b/src/shared/socket-label.c
new file mode 100644
index 0000000000..9ab07a9b31
--- /dev/null
+++ b/src/shared/socket-label.c
@@ -0,0 +1,143 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <net/if.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stddef.h>
+#include <sys/ioctl.h>
+
+#include "macro.h"
+#include "util.h"
+#include "mkdir.h"
+#include "socket-util.h"
+#include "missing.h"
+#include "label.h"
+
+int socket_address_listen(
+ const SocketAddress *a,
+ int backlog,
+ SocketAddressBindIPv6Only only,
+ const char *bind_to_device,
+ bool free_bind,
+ bool transparent,
+ mode_t directory_mode,
+ mode_t socket_mode,
+ const char *label,
+ int *ret) {
+
+ int r, fd, one;
+ assert(a);
+ assert(ret);
+
+ if ((r = socket_address_verify(a)) < 0)
+ return r;
+
+ if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
+ return -EAFNOSUPPORT;
+
+ r = label_socket_set(label);
+ if (r < 0)
+ return r;
+
+ fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, a->protocol);
+ r = fd < 0 ? -errno : 0;
+
+ label_socket_clear();
+
+ if (r < 0)
+ return r;
+
+ if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
+ int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
+
+ if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0)
+ goto fail;
+ }
+
+ if (socket_address_family(a) == AF_INET || socket_address_family(a) == AF_INET6) {
+ if (bind_to_device)
+ if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
+ goto fail;
+
+ if (free_bind) {
+ one = 1;
+ if (setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) < 0)
+ log_warning("IP_FREEBIND failed: %m");
+ }
+
+ if (transparent) {
+ one = 1;
+ if (setsockopt(fd, IPPROTO_IP, IP_TRANSPARENT, &one, sizeof(one)) < 0)
+ log_warning("IP_TRANSPARENT failed: %m");
+ }
+ }
+
+ one = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
+ goto fail;
+
+ if (socket_address_family(a) == AF_UNIX && a->sockaddr.un.sun_path[0] != 0) {
+ mode_t old_mask;
+
+ /* Create parents */
+ mkdir_parents(a->sockaddr.un.sun_path, directory_mode);
+
+ /* Enforce the right access mode for the socket*/
+ old_mask = umask(~ socket_mode);
+
+ /* Include the original umask in our mask */
+ umask(~socket_mode | old_mask);
+
+ r = label_bind(fd, &a->sockaddr.sa, a->size);
+
+ if (r < 0 && errno == EADDRINUSE) {
+ /* Unlink and try again */
+ unlink(a->sockaddr.un.sun_path);
+ r = bind(fd, &a->sockaddr.sa, a->size);
+ }
+
+ umask(old_mask);
+ } else
+ r = bind(fd, &a->sockaddr.sa, a->size);
+
+ if (r < 0)
+ goto fail;
+
+ if (socket_address_can_accept(a))
+ if (listen(fd, backlog) < 0)
+ goto fail;
+
+ *ret = fd;
+ return 0;
+
+fail:
+ r = -errno;
+ close_nointr_nofail(fd);
+ return r;
+}