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net: ipv6: fixed endian issue 

A cast made assumption on how data is stored.

This commit makes the following test pass on qemu_leon3:
- net.udp

Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
This commit is contained in:
Martin Åberg 2020-11-16 13:35:16 +01:00 committed by Jukka Rissanen
parent 634b8fd58c
commit 3658f74d17
1 changed files with 7 additions and 3 deletions
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10
subsys/net/ip/ipv6.c
View File

@ -172,11 +172,15 @@ static inline int ipv6_handle_ext_hdr_options(struct net_pkt *pkt,
uint16_t exthdr_len = 0U;
uint16_t length = 0U;
if (net_pkt_read_u8(pkt, (uint8_t *)&exthdr_len)) {
return -ENOBUFS;
{
uint8_t val = 0U;
if (net_pkt_read_u8(pkt, &val)) {
return -ENOBUFS;
}
exthdr_len = val * 8U + 8;
}
exthdr_len = exthdr_len * 8U + 8;
if (exthdr_len > pkt_len) {
NET_DBG("Corrupted packet, extension header %d too long "
"(max %d bytes)", exthdr_len, pkt_len);