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934ab3036e
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149 lines
3.5 KiB
C
149 lines
3.5 KiB
C
/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#include "config.h"
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#include <stdint.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/file.h>
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#ifdef HAVE_PWD_H
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#include <pwd.h>
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#endif
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#include <pipewire/pipewire.h>
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#define DEFAULT_SYSTEM_RUNTIME_DIR "/run/pipewire"
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PW_LOG_TOPIC_EXTERN(mod_topic);
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#define PW_LOG_TOPIC_DEFAULT mod_topic
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static const char *
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get_remote(const struct spa_dict *props)
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{
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const char *name;
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name = getenv("PIPEWIRE_REMOTE");
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if ((name == NULL || name[0] == '\0') && props)
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name = spa_dict_lookup(props, PW_KEY_REMOTE_NAME);
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if (name == NULL || name[0] == '\0')
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name = PW_DEFAULT_REMOTE;
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return name;
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}
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static const char *
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get_runtime_dir(void)
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{
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const char *runtime_dir;
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runtime_dir = getenv("PIPEWIRE_RUNTIME_DIR");
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if (runtime_dir == NULL)
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runtime_dir = getenv("XDG_RUNTIME_DIR");
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if (runtime_dir == NULL)
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runtime_dir = getenv("USERPROFILE");
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return runtime_dir;
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}
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static const char *
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get_system_dir(void)
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{
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return DEFAULT_SYSTEM_RUNTIME_DIR;
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}
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static int try_connect(struct pw_protocol_client *client,
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const char *runtime_dir, const char *name,
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void (*done_callback) (void *data, int res),
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void *data)
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{
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struct sockaddr_un addr;
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socklen_t size;
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int res, name_size, fd;
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pw_log_info("connecting to '%s' runtime_dir:%s", name, runtime_dir);
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if ((fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0)) < 0) {
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res = -errno;
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goto error;
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}
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memset(&addr, 0, sizeof(addr));
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addr.sun_family = AF_LOCAL;
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if (runtime_dir == NULL)
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name_size = snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", name) + 1;
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else
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name_size = snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", runtime_dir, name) + 1;
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if (name_size > (int) sizeof addr.sun_path) {
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if (runtime_dir == NULL)
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pw_log_error("client %p: socket path \"%s\" plus null terminator exceeds %i bytes",
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client, name, (int) sizeof(addr.sun_path));
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else
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pw_log_error("client %p: socket path \"%s/%s\" plus null terminator exceeds %i bytes",
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client, runtime_dir, name, (int) sizeof(addr.sun_path));
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res = -ENAMETOOLONG;
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goto error_close;
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};
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size = offsetof(struct sockaddr_un, sun_path) + name_size;
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if (connect(fd, (struct sockaddr *) &addr, size) < 0) {
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pw_log_debug("connect to '%s' failed: %m", name);
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if (errno == ENOENT)
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errno = EHOSTDOWN;
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if (errno == EAGAIN) {
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pw_log_info("client %p: connect pending, fd %d", client, fd);
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} else {
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res = -errno;
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goto error_close;
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}
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}
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res = pw_protocol_client_connect_fd(client, fd, true);
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if (done_callback)
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done_callback(data, res);
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return res;
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error_close:
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close(fd);
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error:
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return res;
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}
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int pw_protocol_native_connect_local_socket(struct pw_protocol_client *client,
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const struct spa_dict *props,
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void (*done_callback) (void *data, int res),
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void *data)
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{
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const char *runtime_dir, *name;
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int res;
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name = get_remote(props);
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if (name == NULL)
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return -EINVAL;
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if (name[0] == '/') {
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res = try_connect(client, NULL, name, done_callback, data);
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} else {
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runtime_dir = get_runtime_dir();
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if (runtime_dir != NULL) {
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res = try_connect(client, runtime_dir, name, done_callback, data);
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if (res >= 0)
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goto exit;
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}
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runtime_dir = get_system_dir();
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if (runtime_dir != NULL)
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res = try_connect(client, runtime_dir, name, done_callback, data);
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}
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exit:
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return res;
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}
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