upstream/opnsense-src
1
0
Fork 0
mirror of https://github.com/opnsense/src.git synced 2026-06-10 17:22:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

When receiving an SCTP/UDP packet and the interface performed

Browse source 
the UDP checksum computation and signals that it was OK,
clear this bit when passing the packet to SCTP. Since the
bits indicating a valid UDP checksum and a valid SCTP
checksum are the same, the SCTP stack would assume
that also an SCTP checksum check has been performed.

MFC after: 1 week
This commit is contained in:
Michael Tuexen 2015-11-26 09:25:20 +00:00
parent 3ec75a6ccf
commit 52f175be70
1 changed files with 12 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
sys/netinet/sctputil.c
View file

@ -6957,6 +6957,18 @@ sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *inp,
for (last = m; last->m_next; last = last->m_next);
last->m_next = sp;
m->m_pkthdr.len += sp->m_pkthdr.len;
/*
* The CSUM_DATA_VALID flags indicates that the HW checked the UDP
* checksum and it was valid. Since CSUM_DATA_VALID ==
* CSUM_SCTP_VALID this would imply that the HW also verified the
* SCTP checksum. Therefore, clear the bit.
*/
SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
"sctp_recv_udp_tunneled_packet(): Packet of length %d received on %s with csum_flags 0x%b.\n",
m->m_pkthdr.len,
if_name(m->m_pkthdr.rcvif),
(int)m->m_pkthdr.csum_flags, CSUM_BITS);
m->m_pkthdr.csum_flags &= ~CSUM_DATA_VALID;
iph = mtod(m, struct ip *);
switch (iph->ip_v) {
#ifdef INET