From 4be4139f7d0dc74e5a0932c7c7ddf0eb65da9e3a Mon Sep 17 00:00:00 2001 From: Xin Long Date: Mon, 2 Jul 2018 18:21:14 +0800 Subject: sctp: add support for setting flowlabel when adding a transport 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 Signed-off-by: David S. Miller --- net/sctp/socket.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/sctp/socket.c') diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 50b7ef975b42..502c0d7cb105 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1697,6 +1697,7 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, struct sctp_association *asoc; enum sctp_scope scope; struct cmsghdr *cmsg; + __be32 flowinfo = 0; struct sctp_af *af; int err; @@ -1781,6 +1782,9 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, if (!cmsgs->addrs_msg) return 0; + if (daddr->sa.sa_family == AF_INET6) + flowinfo = daddr->v6.sin6_flowinfo; + /* sendv addr list parse */ for_each_cmsghdr(cmsg, cmsgs->addrs_msg) { struct sctp_transport *transport; @@ -1813,6 +1817,7 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags, } dlen = sizeof(struct in6_addr); + daddr->v6.sin6_flowinfo = flowinfo; daddr->v6.sin6_family = AF_INET6; daddr->v6.sin6_port = htons(asoc->peer.port); memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen); -- cgit v1.2.3