mirror of
https://github.com/morgan9e/systemd
synced 2026-04-15 00:47:10 +09:00
254d1313ae
-1 was used everywhere, but -EBADF or -EBADFD started being used in various places. Let's make things consistent in the new style. Note that there are two candidates: EBADF 9 Bad file descriptor EBADFD 77 File descriptor in bad state Since we're initializating the fd, we're just assigning a value that means "no fd yet", so it's just a bad file descriptor, and the first errno fits better. If instead we had a valid file descriptor that became invalid because of some operation or state change, the other errno would fit better. In some places, initialization is dropped if unnecessary.
133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <errno.h>
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <string.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "fs-util.h"
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#include "log.h"
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#include "macro.h"
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#include "missing_socket.h"
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#include "mkdir-label.h"
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#include "selinux-util.h"
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#include "socket-util.h"
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#include "umask-util.h"
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int socket_address_listen(
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const SocketAddress *a,
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int flags,
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int backlog,
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SocketAddressBindIPv6Only only,
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const char *bind_to_device,
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bool reuse_port,
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bool free_bind,
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bool transparent,
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mode_t directory_mode,
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mode_t socket_mode,
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const char *label) {
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_cleanup_close_ int fd = -EBADF;
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const char *p;
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int r;
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assert(a);
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r = socket_address_verify(a, true);
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if (r < 0)
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return r;
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if (socket_address_family(a) == AF_INET6 && !socket_ipv6_is_supported())
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return -EAFNOSUPPORT;
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if (label) {
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r = mac_selinux_create_socket_prepare(label);
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if (r < 0)
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return r;
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}
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fd = RET_NERRNO(socket(socket_address_family(a), a->type | flags, a->protocol));
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if (label)
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mac_selinux_create_socket_clear();
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if (fd < 0)
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return fd;
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if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
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r = setsockopt_int(fd, IPPROTO_IPV6, IPV6_V6ONLY, only == SOCKET_ADDRESS_IPV6_ONLY);
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if (r < 0)
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return r;
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}
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if (IN_SET(socket_address_family(a), AF_INET, AF_INET6)) {
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if (bind_to_device) {
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r = socket_bind_to_ifname(fd, bind_to_device);
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if (r < 0)
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return r;
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}
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if (reuse_port) {
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r = setsockopt_int(fd, SOL_SOCKET, SO_REUSEPORT, true);
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if (r < 0)
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log_warning_errno(r, "SO_REUSEPORT failed: %m");
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}
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if (free_bind) {
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r = socket_set_freebind(fd, socket_address_family(a), true);
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if (r < 0)
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log_warning_errno(r, "IP_FREEBIND/IPV6_FREEBIND failed: %m");
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}
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if (transparent) {
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r = socket_set_transparent(fd, socket_address_family(a), true);
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if (r < 0)
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log_warning_errno(r, "IP_TRANSPARENT/IPV6_TRANSPARENT failed: %m");
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}
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}
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r = setsockopt_int(fd, SOL_SOCKET, SO_REUSEADDR, true);
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if (r < 0)
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return r;
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p = socket_address_get_path(a);
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if (p) {
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/* Create parents */
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(void) mkdir_parents_label(p, directory_mode);
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/* Enforce the right access mode for the socket */
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WITH_UMASK(~socket_mode) {
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r = mac_selinux_bind(fd, &a->sockaddr.sa, a->size);
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if (r == -EADDRINUSE) {
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/* Unlink and try again */
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if (unlink(p) < 0)
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return r; /* didn't work, return original error */
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r = mac_selinux_bind(fd, &a->sockaddr.sa, a->size);
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}
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if (r < 0)
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return r;
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}
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} else {
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if (bind(fd, &a->sockaddr.sa, a->size) < 0)
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return -errno;
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}
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if (socket_address_can_accept(a))
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if (listen(fd, backlog) < 0)
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return -errno;
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/* Let's trigger an inotify event on the socket node, so that anyone waiting for this socket to be connectable
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* gets notified */
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if (p)
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(void) touch(p);
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return TAKE_FD(fd);
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}
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