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sctp: add support for setting flowlabel when adding a transport

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Struct sockaddr_in6 has the member sin6_flowinfo that includes the
ipv6 flowlabel, it should also support for setting flowlabel when
adding a transport whose ipaddr is from userspace.

Note that addrinfo in sctp_sendmsg is using struct in6_addr for
the secondary addrs, which doesn't contain sin6_flowinfo, and
it needs to copy sin6_flowinfo from the primary addr.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2018-07-02 18:21:14 +08:00 • committed by David S. Miller
parent 0b0dce7a36
commit 4be4139f7d
2 changed files with 15 additions and 2 deletions
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12
net/sctp/associola.c
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@ -650,8 +650,16 @@ 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;
if (addr->sa.sa_family == AF_INET6) {
__be32 info = addr->v6.sin6_flowinfo;
if (info) {
peer->flowlabel = ntohl(info & IPV6_FLOWLABEL_MASK);
peer->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
} else {
peer->flowlabel = asoc->flowlabel;
}
}
peer->dscp = asoc->dscp;
/* Enable/disable heartbeat, SACK delay, and path MTU discovery