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babeld: Hop Count must not be 0.

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According to RFC 8966:
Hop Count The maximum number of times that this TLV may be forwarded, plus 1. This MUST NOT be 0.

Signed-off-by: zmw12306 <zmw12306@gmail.com>
This commit is contained in:
zmw12306 2025-03-31 00:01:53 -04:00
parent 44c4743e08
commit 2b2bebfa92
1 changed files with 4 additions and 0 deletions
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4
babeld/message.c
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@ -734,6 +734,10 @@ parse_packet(const unsigned char *from, struct interface *ifp,
format_prefix(prefix, plen),
format_address(from), ifp->name,
format_eui64(message + 8), seqno);
if(message[6] == 0) {
debugf(BABEL_DEBUG_COMMON, "Received request with invalid hop count 0");
goto done;
}
handle_request(neigh, prefix, plen, message[6], seqno, message + 8);
} else {
debugf(BABEL_DEBUG_COMMON,"Received unknown packet type %d from %s on %s.",