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pkt_init: check feature bits.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2016-10-07 17:39:55 +10:30
parent ec64e7756e
commit 5e078a8167
4 changed files with 46 additions and 5 deletions
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23
daemon/peer.c
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@@ -2104,7 +2104,28 @@ static struct io_plan *init_pkt_in(struct io_conn *conn, struct peer *peer)
state_name(peer->state)));
return pkt_out(conn, peer);
}
if (peer->inpkt->init->has_features) {
size_t i;
for (i = 0; i < peer->inpkt->init->features.len*CHAR_BIT; i++) {
size_t byte = i / CHAR_BIT, bit = i % CHAR_BIT;
if (peer->inpkt->init->features.data[byte] & (1<<bit)) {
/* Can't handle even features. */
if (i % 2 != 0) {
log_debug(peer->log,
"They offered feature %zu", i);
continue;
}
queue_pkt_err(peer,
pkt_err(peer,
"Unsupported feature %zu",
i));
return pkt_out(conn, peer);
}
}
}
/* Send any packets they missed. */
retransmit_pkts(peer, peer->inpkt->init->ack);