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In case of IPsec he have to do delayed checksum calculations before

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adding any extension header, or rather before calling into IPsec
processing as we may send the packet and not return to IPv6 output
processing here.

PR:		kern/170116
MFC After:	3 days
This commit is contained in:
Bjoern A. Zeeb 2012-07-31 23:34:06 +00:00
parent adebcba798
commit 3b43b78342
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=238960
1 changed files with 14 additions and 0 deletions
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14
sys/netinet6/ip6_output.c
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@ -306,6 +306,20 @@ ip6_output(struct mbuf *m0, struct ip6_pktopts *opt,
goto freehdrs;
case -1: /* Do IPSec */
needipsec = 1;
/*
* Do delayed checksums now, as we may send before returning.
*/
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6) {
plen = m->m_pkthdr.len - sizeof(*ip6);
in6_delayed_cksum(m, plen, sizeof(struct ip6_hdr));
m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA_IPV6;
}
#ifdef SCTP
if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV6) {
sctp_delayed_cksum(m, sizeof(struct ip6_hdr));
m->m_pkthdr.csum_flags &= ~CSUM_SCTP_IPV6;
}
#endif
case 0: /* No IPSec */
default:
break;