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uvc: clamp payload and accept host probe

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This commit is contained in:
Brad Stein 2026-01-06 04:58:04 -03:00
parent a9f3195952
commit 2570ea69db
1 changed files with 7 additions and 0 deletions
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7
server/src/bin/lesavka-uvc.rs
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@ -198,6 +198,8 @@ impl UvcConfig {
let interval = env_u32("LESAVKA_UVC_INTERVAL", 0);
let mut max_packet = env_u32("LESAVKA_UVC_MAXPACKET", 3072);
if env::var("LESAVKA_UVC_BULK").is_ok() {
max_packet = max_packet.min(512);
} else {
max_packet = max_packet.min(1024);
}
@ -386,6 +388,7 @@ fn sanitize_streaming_control(data: &[u8], state: &UvcState) -> [u8; STREAM_CTRL
let format_index = data[2];
let frame_index = data[3];
let interval = read_le32(data, 4);
let host_payload = read_le32(data, 22);
if format_index == 1 {
out[2] = 1;
@ -396,6 +399,10 @@ fn sanitize_streaming_control(data: &[u8], state: &UvcState) -> [u8; STREAM_CTRL
if interval == state.cfg.interval {
write_le32(&mut out[4..8], interval);
}
if host_payload > 0 {
let payload = host_payload.min(state.cfg.max_packet);
write_le32(&mut out[22..26], payload);
}
}
out
}