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Merge pull request #17850 from fabian18/bugfix_nib_6LN_context_option_length

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ipv6/nib: bugfix of 6CO length checking
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fabian18 2022-03-24 22:07:18 +01:00 committed by GitHub
commit 09b98ea4fc
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1 changed files with 4 additions and 8 deletions
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12
sys/net/gnrc/network_layer/ipv6/nib/_nib-6ln.c
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@ -280,14 +280,10 @@ uint32_t _handle_6co(const icmpv6_hdr_t *icmpv6,
#ifdef MODULE_GNRC_SIXLOWPAN_CTX
uint8_t cid;
#endif /* MODULE_GNRC_SIXLOWPAN_CTX */
if ((sixco->len != SIXLOWPAN_ND_OPT_6CTX_LEN_MIN) ||
((sixco->len != SIXLOWPAN_ND_OPT_6CTX_LEN_MAX) &&
(sixco->ctx_len > 64U)) ||
(icmpv6->type != ICMPV6_RTR_ADV)) {
DEBUG("nib: received 6CO of invalid length (%u), must be %u "
"or wasn't delivered by RA."
"\n",
(void)icmpv6;
if (sixco->len != (sixco->ctx_len > 64U
? SIXLOWPAN_ND_OPT_6CTX_LEN_MAX : SIXLOWPAN_ND_OPT_6CTX_LEN_MIN)) {
DEBUG("nib: received 6CO of invalid length (%u), must be %u\n",
sixco->len,
(sixco->ctx_len > 64U) ? SIXLOWPAN_ND_OPT_6CTX_LEN_MAX :
SIXLOWPAN_ND_OPT_6CTX_LEN_MIN);