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Make coherency counter 12bit as it should

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Approved by:	glebius (mentor)
This commit is contained in:
Alexander Motin 2007-05-04 16:05:58 +00:00
parent b9d8f1d9c7
commit 755bc28723
1 changed files with 6 additions and 4 deletions
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10
sys/netgraph/ng_mppc.c
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@ -113,6 +113,8 @@ MALLOC_DEFINE(M_NETGRAPH_MPPC, "netgraph_mppc", "netgraph mppc node ");
#define MPPC_FLAG_ENCRYPTED 0x1000 /* packet is encrypted */
#define MPPC_CCOUNT_MASK 0x0fff /* sequence number mask */
#define MPPC_CCOUNT_INC(d) ((d) = (((d) + 1) & MPPC_CCOUNT_MASK))
#define MPPE_UPDATE_MASK 0xff /* coherency count when we're */
#define MPPE_UPDATE_FLAG 0xff /* supposed to update key */
@ -563,8 +565,8 @@ ng_mppc_compress(node_p node, struct mbuf *m, struct mbuf **resultp)
}
#endif
/* Update sequence number */
d->cc++;
/* Update coherency count for next time (12 bit arithmetic) */
MPPC_CCOUNT_INC(d->cc);
/* Install header */
*((u_int16_t *)outbuf) = htons(header);
@ -635,7 +637,7 @@ ng_mppc_decompress(node_p node, struct mbuf *m, struct mbuf **resultp)
ng_mppc_updatekey(d->cfg.bits,
d->cfg.startkey, d->key, &d->rc4);
}
d->cc++;
MPPC_CCOUNT_INC(d->cc);
}
/* Reset key (except in stateless mode, see below) */
@ -683,7 +685,7 @@ ng_mppc_decompress(node_p node, struct mbuf *m, struct mbuf **resultp)
}
/* Update coherency count for next time (12 bit arithmetic) */
d->cc++;
MPPC_CCOUNT_INC(d->cc);
/* Check for unexpected compressed packet */
if ((header & MPPC_FLAG_COMPRESSED) != 0