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fix(client): harden ancillary control message parsing

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Nils Andreas Svee committed 2026-05-07 19:02:38 +07:00
1 parent afb97da196
commit 49321ba8b7
1 file changed
+10 -7
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crates/irtt-client/src/receive/linux.rs
+10 -7
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@@ -86,13 +86,16 @@ unsafe fn parse_receive_meta(msg: &libc::msghdr) -> ReceiveMeta {
let mut cmsg = libc::CMSG_FIRSTHDR(msg);
while !cmsg.is_null() {
let cmsg_ref = &*cmsg;
if cmsg_ref.cmsg_len >= libc::CMSG_LEN(0) as usize {
let data_len = cmsg_ref.cmsg_len - libc::CMSG_LEN(0) as usize;
if is_traffic_class_cmsg(cmsg_ref) {
meta.traffic_class = read_int_cmsg_low_byte(cmsg, data_len);
} else if is_kernel_rx_timestamp_cmsg(cmsg_ref) {
meta.kernel_rx_timestamp = read_timespec_cmsg(cmsg, data_len);
}
let header_len = libc::CMSG_LEN(0) as usize;
if cmsg_ref.cmsg_len < header_len {
cmsg = libc::CMSG_NXTHDR(msg, cmsg);
continue;
}
let data_len = cmsg_ref.cmsg_len - header_len;
if is_traffic_class_cmsg(cmsg_ref) {
meta.traffic_class = read_int_cmsg_low_byte(cmsg, data_len);
} else if is_kernel_rx_timestamp_cmsg(cmsg_ref) {
meta.kernel_rx_timestamp = read_timespec_cmsg(cmsg, data_len);
}
cmsg = libc::CMSG_NXTHDR(msg, cmsg);
}