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https://gitlab.freedesktop.org/pipewire/pipewire.git
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5074ca37ff
A missing XDG_RUNTIME_DIR results in ENOENT, like on the server side. A too long name results in ENAMETOOLONG, like on the server side. When we can't find the socket, return EHOSTDOWN to make it more obvious what is going.
107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/* PipeWire
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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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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#include <pipewire/pipewire.h>
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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 = NULL;
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if (props)
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name = spa_dict_lookup(props, PW_KEY_REMOTE_NAME);
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if (name == NULL)
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name = getenv("PIPEWIRE_REMOTE");
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if (name == NULL)
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name = "pipewire-0";
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return name;
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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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struct sockaddr_un addr;
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socklen_t size;
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const char *runtime_dir, *name = NULL;
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int res, name_size, fd;
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if ((runtime_dir = getenv("XDG_RUNTIME_DIR")) == NULL) {
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pw_log_error("connect failed: XDG_RUNTIME_DIR not set in the environment");
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res = -ENOENT;
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goto error;
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}
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name = get_remote(props);
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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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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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pw_log_error("socket path \"%s/%s\" plus null terminator exceeds 108 bytes",
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runtime_dir, name);
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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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if (errno == ENOENT)
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errno = EHOSTDOWN;
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res = -errno;
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goto error_close;
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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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