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authorXin Long <lucien.xin@gmail.com>2018-07-02 13:21:12 +0300
committerDavid S. Miller <davem@davemloft.net>2018-07-04 05:36:54 +0300
commit8a9c58d28d0f66569737a3295116710ed24573cd (patch)
tree4d530788207cca98e68faee6d5a4145d5d8befc4 /net/sctp/associola.c
parent69b9e1e07d98b57b972df3c44647ca8795284d39 (diff)
downloadlinux-8a9c58d28d0f66569737a3295116710ed24573cd.tar.xz
sctp: add support for dscp and flowlabel per transport
Like some other per transport params, flowlabel and dscp are added in transport, asoc and sctp_sock. By default, transport sets its value from asoc's, and asoc does it from sctp_sock. flowlabel only works for ipv6 transport. Other than that they need to be passed down in sctp_xmit, flow4/6 also needs to set them before looking up route in get_dst. Note that it uses '& 0x100000' to check if flowlabel is set and '& 0x1' (tos 1st bit is unused) to check if dscp is set by users, so that they could be set to 0 by sockopt in next patch. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/associola.c')
-rw-r--r--net/sctp/associola.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 5d5a16204d50..16ecfbc95614 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -115,6 +115,9 @@ static struct sctp_association *sctp_association_init(
/* Initialize path max retrans value. */
asoc->pathmaxrxt = sp->pathmaxrxt;
+ asoc->flowlabel = sp->flowlabel;
+ asoc->dscp = sp->dscp;
+
/* Initialize default path MTU. */
asoc->pathmtu = sp->pathmtu;
@@ -647,6 +650,10 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc,
peer->sackdelay = asoc->sackdelay;
peer->sackfreq = asoc->sackfreq;
+ if (addr->sa.sa_family == AF_INET6)
+ peer->flowlabel = asoc->flowlabel;
+ peer->dscp = asoc->dscp;
+
/* Enable/disable heartbeat, SACK delay, and path MTU discovery
* based on association setting.
*/