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/* PipeWire
*
* Copyright © 2018 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/file.h>
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#include <pipewire/pipewire.h>
#define DEFAULT_SYSTEM_RUNTIME_DIR "/run/pipewire"
PW_LOG_TOPIC_EXTERN(mod_topic);
#define PW_LOG_TOPIC_DEFAULT mod_topic
static const char *
get_remote(const struct spa_dict *props)
{
const char *name;
name = getenv("PIPEWIRE_REMOTE");
if ((name == NULL || name[0] == '\0') && props)
name = spa_dict_lookup(props, PW_KEY_REMOTE_NAME);
if (name == NULL || name[0] == '\0')
name = PW_DEFAULT_REMOTE;
return name;
}
static const char *
get_runtime_dir(void)
{
const char *runtime_dir;
runtime_dir = getenv("PIPEWIRE_RUNTIME_DIR");
if (runtime_dir == NULL)
runtime_dir = getenv("XDG_RUNTIME_DIR");
if (runtime_dir == NULL)
runtime_dir = getenv("USERPROFILE");
return runtime_dir;
}
static const char *
get_system_dir(void)
{
return DEFAULT_SYSTEM_RUNTIME_DIR;
}
static int try_connect(struct pw_protocol_client *client,
const char *runtime_dir, const char *name,
void (*done_callback) (void *data, int res),
void *data)
{
struct sockaddr_un addr;
socklen_t size;
int res, name_size, fd;
pw_log_info("connecting to '%s' runtime_dir:%s", name, runtime_dir);
if ((fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 0)) < 0) {
res = -errno;
goto error;
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_LOCAL;
if (runtime_dir == NULL)
name_size = snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", name) + 1;
else
name_size = snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/%s", runtime_dir, name) + 1;
if (name_size > (int) sizeof addr.sun_path) {
if (runtime_dir == NULL)
pw_log_error("client %p: socket path \"%s\" plus null terminator exceeds %i bytes",
client, name, (int) sizeof(addr.sun_path));
else
pw_log_error("client %p: socket path \"%s/%s\" plus null terminator exceeds %i bytes",
client, runtime_dir, name, (int) sizeof(addr.sun_path));
res = -ENAMETOOLONG;
goto error_close;
};
size = offsetof(struct sockaddr_un, sun_path) + name_size;
if (connect(fd, (struct sockaddr *) &addr, size) < 0) {
pw_log_debug("connect to '%s' failed: %m", name);
if (errno == ENOENT)
errno = EHOSTDOWN;
if (errno == EAGAIN) {
pw_log_info("client %p: connect pending, fd %d", client, fd);
} else {
res = -errno;
goto error_close;
}
}
res = pw_protocol_client_connect_fd(client, fd, true);
if (done_callback)
done_callback(data, res);
return res;
error_close:
close(fd);
error:
return res;
}
int pw_protocol_native_connect_local_socket(struct pw_protocol_client *client,
const struct spa_dict *props,
void (*done_callback) (void *data, int res),
void *data)
{
const char *runtime_dir, *name;
int res;
name = get_remote(props);
if (name == NULL)
return -EINVAL;
if (name[0] == '/') {
res = try_connect(client, NULL, name, done_callback, data);
} else {
runtime_dir = get_runtime_dir();
if (runtime_dir != NULL) {
res = try_connect(client, runtime_dir, name, done_callback, data);
if (res >= 0)
goto exit;
}
runtime_dir = get_system_dir();
if (runtime_dir != NULL)
res = try_connect(client, runtime_dir, name, done_callback, data);
}
exit:
return res;
}
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