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out_path_len fixes

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liquidraver
2026-09-20 14:21:25 +02:00
parent a18f956c08
commit fcfee673a5
2 changed files with 22 additions and 1 deletions
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zephcore/helpers/ClientACL.cpp
+15
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@@ -39,6 +39,21 @@ void ClientACL::load(const char* path, const mesh::LocalIdentity& self_id) {
if (!success) break; // EOF
/* out_path_len is the one byte in this file that steers routing, and
* it is used without a later bounds check: anything that is not
* OUT_PATH_UNKNOWN is taken as a usable path. A value with the
* reserved hash size 4 (0xC0-0xFE) passes that test, then copyPath()
* rejects the encoding inside sendDirect() and the reply leaves as a
* zero-hop direct -- undeliverable, and never retried, because the
* repeater considers the request answered. Fall back to "unknown",
* which costs one flooded reply and re-learns the real path. */
if (c.out_path_len != OUT_PATH_UNKNOWN &&
!mesh::Packet::isValidPathLen(c.out_path_len)) {
LOG_WRN("load: client %d has invalid out_path_len 0x%02x, discarding path",
num_clients, c.out_path_len);
c.out_path_len = OUT_PATH_UNKNOWN;
}
c.id = mesh::Identity(pub_key);
self_id.calcSharedSecret(c.shared_secret, pub_key); // recalculate in case key changed