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Guard against malformed broadcast announcements

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This commit is contained in:
adamdunkels 2010-03-31 12:17:24 +00:00
parent 52ad0008dc
commit 4e33112d3e
1 changed files with 8 additions and 1 deletions
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9
core/net/rime/broadcast-announcement.c
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@ -33,7 +33,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: broadcast-announcement.c,v 1.3 2010/03/25 08:49:56 adamdunkels Exp $
* $Id: broadcast-announcement.c,v 1.4 2010/03/31 12:17:24 adamdunkels Exp $
*/
/**
@ -137,6 +137,13 @@ adv_packet_received(struct broadcast_conn *ibc, const rimeaddr_t *from)
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
from->u8[0], from->u8[1], adata.num);
if(adata.num / sizeof(struct announcement_data) > sizeof(struct announcement_msg)) {
/* The number of announcements is too large - corrupt packet has
been received. */
printf("adata.num way out there: %d\n", adata.num);
return;
}
for(i = 0; i < adata.num; ++i) {
struct announcement_data data;