mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-02 09:01:46 -05:00
73dee7c9f7
An assertion was already used in pa_socket_server_new_unix(), this makes the TCP variants consistent with that. Even if pa_socket_server_new() could fail, the error handling wasn't good, because there was no "goto fail", meaning that the fd would have been leaked.
576 lines
15 KiB
C
576 lines
15 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#ifdef HAVE_SYS_UN_H
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#include <sys/un.h>
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#ifndef SUN_LEN
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#define SUN_LEN(ptr) \
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((size_t)(((struct sockaddr_un *) 0)->sun_path) + strlen((ptr)->sun_path))
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#endif
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_LIBWRAP
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#include <tcpd.h>
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/* Solaris requires that the allow_severity and deny_severity variables be
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* defined in the client program. */
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#ifdef __sun
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#include <syslog.h>
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int allow_severity = LOG_INFO;
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int deny_severity = LOG_WARNING;
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#endif
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#endif /* HAVE_LIBWRAP */
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#ifdef HAVE_SYSTEMD_DAEMON
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#include <systemd/sd-daemon.h>
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#endif
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#include <pulse/xmalloc.h>
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#include <pulse/util.h>
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#include <pulsecore/socket.h>
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#include <pulsecore/socket-util.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/log.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/core-error.h>
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#include <pulsecore/refcnt.h>
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#include <pulsecore/arpa-inet.h>
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#include "socket-server.h"
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struct pa_socket_server {
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PA_REFCNT_DECLARE;
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int fd;
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char *filename;
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bool activated;
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char *tcpwrap_service;
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pa_socket_server_on_connection_cb_t on_connection;
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void *userdata;
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pa_io_event *io_event;
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pa_mainloop_api *mainloop;
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enum {
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SOCKET_SERVER_GENERIC,
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SOCKET_SERVER_IPV4,
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SOCKET_SERVER_UNIX,
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SOCKET_SERVER_IPV6
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} type;
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};
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static void callback(pa_mainloop_api *mainloop, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
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pa_socket_server *s = userdata;
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pa_iochannel *io;
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int nfd;
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pa_assert(s);
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pa_assert(PA_REFCNT_VALUE(s) >= 1);
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pa_assert(s->mainloop == mainloop);
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pa_assert(s->io_event == e);
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pa_assert(e);
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pa_assert(fd >= 0);
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pa_assert(fd == s->fd);
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pa_socket_server_ref(s);
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if ((nfd = pa_accept_cloexec(fd, NULL, NULL)) < 0) {
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pa_log("accept(): %s", pa_cstrerror(errno));
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goto finish;
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}
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if (!s->on_connection) {
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pa_close(nfd);
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goto finish;
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}
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#ifdef HAVE_LIBWRAP
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if (s->tcpwrap_service) {
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struct request_info req;
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request_init(&req, RQ_DAEMON, s->tcpwrap_service, RQ_FILE, nfd, NULL);
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fromhost(&req);
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if (!hosts_access(&req)) {
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pa_log_warn("TCP connection refused by tcpwrap.");
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pa_close(nfd);
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goto finish;
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}
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pa_log_info("TCP connection accepted by tcpwrap.");
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}
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#endif
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/* There should be a check for socket type here */
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if (s->type == SOCKET_SERVER_IPV4)
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pa_make_tcp_socket_low_delay(nfd);
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else
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pa_make_socket_low_delay(nfd);
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pa_assert_se(io = pa_iochannel_new(s->mainloop, nfd, nfd));
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s->on_connection(s, io, s->userdata);
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finish:
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pa_socket_server_unref(s);
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}
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pa_socket_server* pa_socket_server_new(pa_mainloop_api *m, int fd) {
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pa_socket_server *s;
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pa_assert(m);
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pa_assert(fd >= 0);
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s = pa_xnew0(pa_socket_server, 1);
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PA_REFCNT_INIT(s);
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s->fd = fd;
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s->mainloop = m;
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pa_assert_se(s->io_event = m->io_new(m, fd, PA_IO_EVENT_INPUT, callback, s));
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s->type = SOCKET_SERVER_GENERIC;
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return s;
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}
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pa_socket_server* pa_socket_server_ref(pa_socket_server *s) {
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pa_assert(s);
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pa_assert(PA_REFCNT_VALUE(s) >= 1);
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PA_REFCNT_INC(s);
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return s;
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}
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#ifdef HAVE_SYS_UN_H
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pa_socket_server* pa_socket_server_new_unix(pa_mainloop_api *m, const char *filename) {
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int fd = -1;
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bool activated = false;
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struct sockaddr_un sa;
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pa_socket_server *s;
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pa_assert(m);
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pa_assert(filename);
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#ifdef HAVE_SYSTEMD_DAEMON
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{
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int n = sd_listen_fds(0);
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if (n > 0) {
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for (int i = 0; i < n; ++i) {
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if (sd_is_socket_unix(SD_LISTEN_FDS_START + i, SOCK_STREAM, 1, filename, 0) > 0) {
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fd = SD_LISTEN_FDS_START + i;
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activated = true;
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pa_log_info("Found socket activation socket for '%s' \\o/", filename);
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break;
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}
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}
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}
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}
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#endif
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if (fd < 0) {
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if ((fd = pa_socket_cloexec(PF_UNIX, SOCK_STREAM, 0)) < 0) {
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pa_log("socket(PF_UNIX): %s", pa_cstrerror(errno));
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goto fail;
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}
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memset(&sa, 0, sizeof(sa));
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sa.sun_family = AF_UNIX;
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pa_strlcpy(sa.sun_path, filename, sizeof(sa.sun_path));
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pa_make_socket_low_delay(fd);
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if (bind(fd, (struct sockaddr*) &sa, (socklen_t) SUN_LEN(&sa)) < 0) {
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pa_log("bind(): %s", pa_cstrerror(errno));
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goto fail;
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}
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/* Allow access from all clients. Sockets like this one should
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* always be put inside a directory with proper access rights,
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* because not all OS check the access rights on the socket
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* inodes. */
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chmod(filename, 0777);
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if (listen(fd, 5) < 0) {
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pa_log("listen(): %s", pa_cstrerror(errno));
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goto fail;
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}
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}
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pa_assert_se(s = pa_socket_server_new(m, fd));
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s->filename = pa_xstrdup(filename);
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s->type = SOCKET_SERVER_UNIX;
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s->activated = activated;
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return s;
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fail:
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if (fd >= 0)
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pa_close(fd);
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return NULL;
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}
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#else /* HAVE_SYS_UN_H */
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pa_socket_server* pa_socket_server_new_unix(pa_mainloop_api *m, const char *filename) {
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return NULL;
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}
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#endif /* HAVE_SYS_UN_H */
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pa_socket_server* pa_socket_server_new_ipv4(pa_mainloop_api *m, uint32_t address, uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_socket_server *ss;
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int fd = -1;
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struct sockaddr_in sa;
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int on = 1;
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pa_assert(m);
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pa_assert(port);
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if ((fd = pa_socket_cloexec(PF_INET, SOCK_STREAM, 0)) < 0) {
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pa_log("socket(PF_INET): %s", pa_cstrerror(errno));
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goto fail;
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}
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#ifdef SO_REUSEADDR
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void *) &on, sizeof(on)) < 0)
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pa_log("setsockopt(): %s", pa_cstrerror(errno));
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#endif
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pa_make_tcp_socket_low_delay(fd);
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memset(&sa, 0, sizeof(sa));
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sa.sin_family = AF_INET;
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sa.sin_port = htons(port);
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sa.sin_addr.s_addr = htonl(address);
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if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
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if (errno == EADDRINUSE && fallback) {
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sa.sin_port = 0;
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if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
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pa_log("bind(): %s", pa_cstrerror(errno));
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goto fail;
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}
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} else {
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pa_log("bind(): %s", pa_cstrerror(errno));
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goto fail;
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}
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}
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if (listen(fd, 5) < 0) {
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pa_log("listen(): %s", pa_cstrerror(errno));
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goto fail;
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}
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pa_assert_se(ss = pa_socket_server_new(m, fd));
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ss->type = SOCKET_SERVER_IPV4;
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ss->tcpwrap_service = pa_xstrdup(tcpwrap_service);
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return ss;
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fail:
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if (fd >= 0)
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pa_close(fd);
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return NULL;
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}
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#ifdef HAVE_IPV6
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pa_socket_server* pa_socket_server_new_ipv6(pa_mainloop_api *m, const uint8_t address[16], uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_socket_server *ss;
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int fd = -1;
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struct sockaddr_in6 sa;
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int on;
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pa_assert(m);
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pa_assert(port > 0);
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if ((fd = pa_socket_cloexec(PF_INET6, SOCK_STREAM, 0)) < 0) {
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pa_log("socket(PF_INET6): %s", pa_cstrerror(errno));
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goto fail;
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}
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#ifdef IPV6_V6ONLY
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on = 1;
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if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (const void *) &on, sizeof(on)) < 0)
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pa_log("setsockopt(IPPROTO_IPV6, IPV6_V6ONLY): %s", pa_cstrerror(errno));
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#endif
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#ifdef SO_REUSEADDR
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on = 1;
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if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const void *) &on, sizeof(on)) < 0)
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pa_log("setsockopt(SOL_SOCKET, SO_REUSEADDR, 1): %s", pa_cstrerror(errno));
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#endif
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pa_make_tcp_socket_low_delay(fd);
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memset(&sa, 0, sizeof(sa));
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sa.sin6_family = AF_INET6;
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sa.sin6_port = htons(port);
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memcpy(sa.sin6_addr.s6_addr, address, 16);
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if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
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if (errno == EADDRINUSE && fallback) {
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sa.sin6_port = 0;
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if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
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pa_log("bind(): %s", pa_cstrerror(errno));
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goto fail;
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}
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} else {
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pa_log("bind(): %s", pa_cstrerror(errno));
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goto fail;
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}
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}
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if (listen(fd, 5) < 0) {
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pa_log("listen(): %s", pa_cstrerror(errno));
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goto fail;
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}
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pa_assert_se(ss = pa_socket_server_new(m, fd));
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ss->type = SOCKET_SERVER_IPV6;
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ss->tcpwrap_service = pa_xstrdup(tcpwrap_service);
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return ss;
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fail:
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if (fd >= 0)
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pa_close(fd);
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return NULL;
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}
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#endif
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pa_socket_server* pa_socket_server_new_ipv4_loopback(pa_mainloop_api *m, uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_assert(m);
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pa_assert(port > 0);
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return pa_socket_server_new_ipv4(m, INADDR_LOOPBACK, port, fallback, tcpwrap_service);
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}
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#ifdef HAVE_IPV6
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pa_socket_server* pa_socket_server_new_ipv6_loopback(pa_mainloop_api *m, uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_assert(m);
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pa_assert(port > 0);
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return pa_socket_server_new_ipv6(m, in6addr_loopback.s6_addr, port, fallback, tcpwrap_service);
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}
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#endif
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pa_socket_server* pa_socket_server_new_ipv4_any(pa_mainloop_api *m, uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_assert(m);
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pa_assert(port > 0);
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return pa_socket_server_new_ipv4(m, INADDR_ANY, port, fallback, tcpwrap_service);
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}
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#ifdef HAVE_IPV6
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pa_socket_server* pa_socket_server_new_ipv6_any(pa_mainloop_api *m, uint16_t port, bool fallback, const char *tcpwrap_service) {
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pa_assert(m);
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pa_assert(port > 0);
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return pa_socket_server_new_ipv6(m, in6addr_any.s6_addr, port, fallback, tcpwrap_service);
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}
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#endif
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pa_socket_server* pa_socket_server_new_ipv4_string(pa_mainloop_api *m, const char *name, uint16_t port, bool fallback, const char *tcpwrap_service) {
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struct in_addr ipv4;
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pa_assert(m);
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pa_assert(name);
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pa_assert(port > 0);
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if (inet_pton(AF_INET, name, &ipv4) > 0)
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return pa_socket_server_new_ipv4(m, ntohl(ipv4.s_addr), port, fallback, tcpwrap_service);
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return NULL;
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}
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#ifdef HAVE_IPV6
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pa_socket_server* pa_socket_server_new_ipv6_string(pa_mainloop_api *m, const char *name, uint16_t port, bool fallback, const char *tcpwrap_service) {
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struct in6_addr ipv6;
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pa_assert(m);
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pa_assert(name);
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pa_assert(port > 0);
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if (inet_pton(AF_INET6, name, &ipv6) > 0)
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return pa_socket_server_new_ipv6(m, ipv6.s6_addr, port, fallback, tcpwrap_service);
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return NULL;
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}
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#endif
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static void socket_server_free(pa_socket_server*s) {
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pa_assert(s);
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if (!s->activated && s->filename)
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unlink(s->filename);
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pa_xfree(s->filename);
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pa_close(s->fd);
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pa_xfree(s->tcpwrap_service);
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s->mainloop->io_free(s->io_event);
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pa_xfree(s);
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}
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void pa_socket_server_unref(pa_socket_server *s) {
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pa_assert(s);
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pa_assert(PA_REFCNT_VALUE(s) >= 1);
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if (PA_REFCNT_DEC(s) <= 0)
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socket_server_free(s);
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}
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void pa_socket_server_set_callback(pa_socket_server*s, pa_socket_server_on_connection_cb_t on_connection, void *userdata) {
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pa_assert(s);
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pa_assert(PA_REFCNT_VALUE(s) >= 1);
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s->on_connection = on_connection;
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s->userdata = userdata;
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}
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char *pa_socket_server_get_address(pa_socket_server *s, char *c, size_t l) {
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pa_assert(s);
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pa_assert(PA_REFCNT_VALUE(s) >= 1);
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pa_assert(c);
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pa_assert(l > 0);
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switch (s->type) {
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#ifdef HAVE_IPV6
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case SOCKET_SERVER_IPV6: {
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struct sockaddr_in6 sa;
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socklen_t sa_len = sizeof(sa);
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if (getsockname(s->fd, (struct sockaddr*) &sa, &sa_len) < 0) {
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pa_log("getsockname(): %s", pa_cstrerror(errno));
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return NULL;
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}
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if (memcmp(&in6addr_any, &sa.sin6_addr, sizeof(in6addr_any)) == 0) {
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char fqdn[256];
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if (!pa_get_fqdn(fqdn, sizeof(fqdn)))
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return NULL;
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pa_snprintf(c, l, "tcp6:%s:%u", fqdn, (unsigned) ntohs(sa.sin6_port));
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} else if (memcmp(&in6addr_loopback, &sa.sin6_addr, sizeof(in6addr_loopback)) == 0) {
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char *id;
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if (!(id = pa_machine_id()))
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return NULL;
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|
|
pa_snprintf(c, l, "{%s}tcp6:localhost:%u", id, (unsigned) ntohs(sa.sin6_port));
|
|
pa_xfree(id);
|
|
} else {
|
|
char ip[INET6_ADDRSTRLEN];
|
|
|
|
if (!inet_ntop(AF_INET6, &sa.sin6_addr, ip, sizeof(ip))) {
|
|
pa_log("inet_ntop(): %s", pa_cstrerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
pa_snprintf(c, l, "tcp6:[%s]:%u", ip, (unsigned) ntohs(sa.sin6_port));
|
|
}
|
|
|
|
return c;
|
|
}
|
|
#endif
|
|
|
|
case SOCKET_SERVER_IPV4: {
|
|
struct sockaddr_in sa;
|
|
socklen_t sa_len = sizeof(sa);
|
|
|
|
if (getsockname(s->fd, (struct sockaddr*) &sa, &sa_len) < 0) {
|
|
pa_log("getsockname(): %s", pa_cstrerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
if (sa.sin_addr.s_addr == INADDR_ANY) {
|
|
char fqdn[256];
|
|
if (!pa_get_fqdn(fqdn, sizeof(fqdn)))
|
|
return NULL;
|
|
|
|
pa_snprintf(c, l, "tcp:%s:%u", fqdn, (unsigned) ntohs(sa.sin_port));
|
|
} else if (sa.sin_addr.s_addr == INADDR_LOOPBACK) {
|
|
char *id;
|
|
|
|
if (!(id = pa_machine_id()))
|
|
return NULL;
|
|
|
|
pa_snprintf(c, l, "{%s}tcp:localhost:%u", id, (unsigned) ntohs(sa.sin_port));
|
|
pa_xfree(id);
|
|
} else {
|
|
char ip[INET_ADDRSTRLEN];
|
|
|
|
if (!inet_ntop(AF_INET, &sa.sin_addr, ip, sizeof(ip))) {
|
|
pa_log("inet_ntop(): %s", pa_cstrerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
pa_snprintf(c, l, "tcp:[%s]:%u", ip, (unsigned) ntohs(sa.sin_port));
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
case SOCKET_SERVER_UNIX: {
|
|
char *id;
|
|
|
|
if (!s->filename)
|
|
return NULL;
|
|
|
|
if (!(id = pa_machine_id()))
|
|
return NULL;
|
|
|
|
pa_snprintf(c, l, "{%s}unix:%s", id, s->filename);
|
|
pa_xfree(id);
|
|
return c;
|
|
}
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|