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,
44 mode_t directory_mode,
48 _cleanup_close_ int fd = -1;
53 r = socket_address_verify(a);
57 if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
61 r = mac_selinux_create_socket_prepare(label);
66 fd = socket(socket_address_family(a), a->type | flags, a->protocol);
67 r = fd < 0 ? -errno : 0;
70 mac_selinux_create_socket_clear();
75 if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
76 int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
78 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0)
82 if (socket_address_family(a) == AF_INET || socket_address_family(a) == AF_INET6) {
84 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
89 if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) < 0)
90 log_warning_errno(errno, "SO_REUSEPORT failed: %m");
95 if (setsockopt(fd, IPPROTO_IP, IP_FREEBIND, &one, sizeof(one)) < 0)
96 log_warning_errno(errno, "IP_FREEBIND failed: %m");
101 if (setsockopt(fd, IPPROTO_IP, IP_TRANSPARENT, &one, sizeof(one)) < 0)
102 log_warning_errno(errno, "IP_TRANSPARENT failed: %m");
107 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
110 if (socket_address_family(a) == AF_UNIX && a->sockaddr.un.sun_path[0] != 0) {
114 mkdir_parents_label(a->sockaddr.un.sun_path, directory_mode);
116 /* Enforce the right access mode for the socket */
117 old_mask = umask(~ socket_mode);
119 r = mac_selinux_bind(fd, &a->sockaddr.sa, a->size);
121 if (r < 0 && errno == EADDRINUSE) {
122 /* Unlink and try again */
123 unlink(a->sockaddr.un.sun_path);
124 r = bind(fd, &a->sockaddr.sa, a->size);
129 r = bind(fd, &a->sockaddr.sa, a->size);
134 if (socket_address_can_accept(a))
135 if (listen(fd, backlog) < 0)
144 int make_socket_fd(int log_level, const char* address, int flags) {
148 r = socket_address_parse(&a, address);
150 log_error("Failed to parse socket address \"%s\": %s",
151 address, strerror(-r));
155 fd = socket_address_listen(&a, flags, SOMAXCONN, SOCKET_ADDRESS_DEFAULT,
156 NULL, false, false, false, 0755, 0644, NULL);
157 if (fd < 0 || log_get_max_level() >= log_level) {
158 _cleanup_free_ char *p = NULL;
160 r = socket_address_print(&a, &p);
162 return log_error_errno(r, "socket_address_print(): %m");
165 log_error_errno(fd, "Failed to listen on %s: %m", p);
167 log_full(log_level, "Listening on %s", p);