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Correctly get the payload length in host byte order. While we

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already plan to support >64k payload here, the IPv6 header payload
length obviously is only 16 bit and the calculations need to be right.

Reported by:	dim
Tested by:	dim
MFC after:	1 day
X-MFC:		with r235958
This commit is contained in:
Bjoern A. Zeeb 2012-05-26 23:58:51 +00:00
parent 73c77d2614
commit c69baa7e91
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=236130
1 changed files with 4 additions and 4 deletions
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8
sys/netinet6/ip6_output.c
View File

@ -189,13 +189,13 @@ in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset)
{
u_short csum;
csum = in_cksum_skip(m, ntohl(plen), offset);
csum = in_cksum_skip(m, offset + plen, offset);
if (m->m_pkthdr.csum_flags & CSUM_UDP && csum == 0)
csum = 0xffff;
offset += m->m_pkthdr.csum_data; /* checksum offset */
if (offset + sizeof(u_short) > m->m_len) {
printf("%s: delayed m_pullup, m->len: %d off: %d\n",
printf("%s: delayed m_pullup, m->len: %d off: %d\n",
__func__, m->m_len, offset);
/*
* XXX this should not happen, but if it does, the correct
@ -962,7 +962,7 @@ skip_ipsec2:;
*/
if (sw_csum & CSUM_DELAY_DATA) {
sw_csum &= ~CSUM_DELAY_DATA;
in6_delayed_cksum(m, ip6->ip6_plen, sizeof(struct ip6_hdr));
in6_delayed_cksum(m, plen, sizeof(struct ip6_hdr));
}
#ifdef SCTP
if (sw_csum & CSUM_SCTP) {
@ -1077,7 +1077,7 @@ skip_ipsec2:;
* XXX-BZ handle the hw offloading case. Need flags.
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
in6_delayed_cksum(m, ip6->ip6_plen, sizeof(*ip6));
in6_delayed_cksum(m, plen, hlen);
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
}
#ifdef SCTP