1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #include "selinux-util.h"
33 #include "socket-util.h"
35 int socket_address_listen(
36 const SocketAddress *a,
39 SocketAddressBindIPv6Only only,
40 const char *bind_to_device,
43 mode_t directory_mode,
47 _cleanup_close_ int fd = -1;
52 r = socket_address_verify(a);
56 if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
60 r = mac_selinux_create_socket_prepare(label);
65 fd = socket(socket_address_family(a), a->type | flags, a->protocol);
66 r = fd < 0 ? -errno : 0;
69 mac_selinux_create_socket_clear();
74 if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
75 int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
77 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0)
81 if (socket_address_family(a) == AF_INET || socket_address_family(a) == AF_INET6) {
83 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
88 if (setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) < 0)
89 log_warning_errno(errno, "IP_FREEBIND failed: %m");
94 if (setsockopt(fd, IPPROTO_IP, IP_TRANSPARENT, &one, sizeof(one)) < 0)
95 log_warning_errno(errno, "IP_TRANSPARENT failed: %m");
100 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
103 if (socket_address_family(a) == AF_UNIX && a->sockaddr.un.sun_path[0] != 0) {
107 mkdir_parents_label(a->sockaddr.un.sun_path, directory_mode);
109 /* Enforce the right access mode for the socket */
110 old_mask = umask(~ socket_mode);
112 r = mac_selinux_bind(fd, &a->sockaddr.sa, a->size);
114 if (r < 0 && errno == EADDRINUSE) {
115 /* Unlink and try again */
116 unlink(a->sockaddr.un.sun_path);
117 r = bind(fd, &a->sockaddr.sa, a->size);
122 r = bind(fd, &a->sockaddr.sa, a->size);
127 if (socket_address_can_accept(a))
128 if (listen(fd, backlog) < 0)
137 int make_socket_fd(int log_level, const char* address, int flags) {
141 r = socket_address_parse(&a, address);
143 log_error("Failed to parse socket address \"%s\": %s",
144 address, strerror(-r));
148 fd = socket_address_listen(&a, flags, SOMAXCONN, SOCKET_ADDRESS_DEFAULT,
149 NULL, false, false, 0755, 0644, NULL);
150 if (fd < 0 || log_get_max_level() >= log_level) {
151 _cleanup_free_ char *p = NULL;
153 r = socket_address_print(&a, &p);
155 return log_error_errno(r, "socket_address_print(): %m");
158 log_error_errno(fd, "Failed to listen on %s: %m", p);
160 log_full(log_level, "Listening on %s", p);