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rdp: Allow specifying a listener fd on the command line

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We already have a way for a single RDP client connection to be
passed from a parent process to a child using a combination
of environment variable (RDP_FD) and env var (--env-socket)

This patch allows a bound socket fd (as opposed to a client
connection) to be established in a parent process and provided
to the rdp backend. WSLg uses this to set up an AF_VSOCK
socket for communication between a Windows RDP client and a
weston compositor running under a hypervisor.

Co-authored-by: Hideyuki Nagase <hideyukn@microsoft.com>
Co-authored-by: Steve Pronovost <spronovo@microsoft.com>
Signed-off-by: Hideyuki Nagase <hideyukn@microsoft.com>
Signed-off-by: Steve Pronovost <spronovo@microsoft.com>
Signed-off-by: Brenton DeGeer <brdegeer@microsoft.com>
This commit is contained in:
Brenton DeGeer
2022-03-15 12:24:42 -05:00
committed by Derek Foreman
parent 13e62c9d18
commit 2f9319cef6
5 changed files with 40 additions and 12 deletions
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compositor/main.c
+3
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@@ -688,6 +688,7 @@ usage(int error_code)
" --width=WIDTH\t\tWidth of desktop\n"
" --height=HEIGHT\tHeight of desktop\n"
" --env-socket\t\tUse socket defined in RDP_FD env variable as peer connection\n"
" --external-listener-fd=FD\tUse socket as listener connection\n"
" --address=ADDR\tThe address to bind\n"
" --port=PORT\t\tThe port to listen on\n"
" --no-clients-resize\tThe RDP peers will be forced to the size of the desktop\n"
@@ -2772,6 +2773,7 @@ weston_rdp_backend_config_init(struct weston_rdp_backend_config *config)
config->server_cert = NULL;
config->server_key = NULL;
config->env_socket = 0;
config->external_listener_fd = -1;
config->no_clients_resize = 0;
config->force_no_compression = 0;
config->remotefx_codec = true;
@@ -2793,6 +2795,7 @@ load_rdp_backend(struct weston_compositor *c,
const struct weston_option rdp_options[] = {
{ WESTON_OPTION_BOOLEAN, "env-socket", 0, &config.env_socket },
{ WESTON_OPTION_INTEGER, "external-listener-fd", 0, &config.external_listener_fd },
{ WESTON_OPTION_INTEGER, "width", 0, &parsed_options->width },
{ WESTON_OPTION_INTEGER, "height", 0, &parsed_options->height },
{ WESTON_OPTION_STRING, "address", 0, &config.bind_address },