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fixed bug where context is null but still referenced

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This commit is contained in:
joxe 2010-09-23 19:57:50 +00:00
parent 494d2a3073
commit 77c5187a2e
1 changed files with 7 additions and 9 deletions
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16
core/net/sicslowpan.c
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@ -32,7 +32,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: sicslowpan.c,v 1.44 2010/06/06 12:44:12 joxe Exp $
* $Id: sicslowpan.c,v 1.45 2010/09/23 19:57:50 joxe Exp $
*/
/**
* \file
@ -777,19 +777,17 @@ uncompress_hdr_hc06(u16_t ip_len) {
uint8_t sci = (iphc1 & SICSLOWPAN_IPHC_CID) ?
RIME_IPHC_BUF[2] >> 4 : 0;
/* Source address */
if((iphc1 & SICSLOWPAN_IPHC_SAM_11) != SICSLOWPAN_IPHC_SAM_00) {
context =
addr_context_lookup_by_number(sci);
/* Source address - check context != NULL only if SAM bits are != 0*/
if (tmp != 0) {
context = addr_context_lookup_by_number(sci);
if(context == NULL) {
PRINTF("sicslowpan uncompress_hdr: error context not found\n");
return;
} else {
PRINTF("IPHC: found compressed source context for sci = %d\n", sci);
}
}
uncompress_addr(&SICSLOWPAN_IP_BUF->srcipaddr, context->prefix,
unc_ctxconf[tmp],
/* if tmp == 0 we do not have a context and therefore no prefix */
uncompress_addr(&SICSLOWPAN_IP_BUF->srcipaddr,
tmp != 0 ? context->prefix : NULL, unc_ctxconf[tmp],
(uip_lladdr_t *)packetbuf_addr(PACKETBUF_ADDR_SENDER));
} else {
/* no compression and link local */