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babeld: Add a check to prevent all-ones case

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A router-id MUST NOT consist of either all binary zeroes (0000000000000000 hexadecimal) or all binary ones (FFFFFFFFFFFFFFFF hexadecimal).

Signed-off-by: zmw12306 <zmw12306@gmail.com>
This commit is contained in:
zmw12306 2025-04-05 15:21:27 -04:00
parent 44c4743e08
commit e43dbc8fe1
1 changed files with 3 additions and 2 deletions
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5
babeld/babeld.c
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@ -212,7 +212,8 @@ static void babel_init_routing_process(struct event *thread)
babel_main_loop(thread);/* this function self-add to the t_update thread */
}
/* fill "myid" with an unique id (only if myid != {0}). */
/* fill "myid" with an unique id (only if myid != {0} and myid != {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}). */
static void
babel_get_myid(void)
{
@ -222,7 +223,7 @@ babel_get_myid(void)
int i;
/* if we already have an id (from state file), we return. */
if (memcmp(myid, zeroes, 8) != 0) {
if (memcmp(myid, zeroes, 8) != 0 && memcmp(myid, ones, 8) != 0) {
return;
}