diff options
| author | Michael Tuexen <tuexen@FreeBSD.org> | 2025-10-26 17:58:15 +0000 |
|---|---|---|
| committer | Michael Tuexen <tuexen@FreeBSD.org> | 2025-10-26 17:58:15 +0000 |
| commit | d3a3854fdc6e8da3bc6c1c13aab8d371445d2914 (patch) | |
| tree | 20b0b1897fa9580b40933ce471f8e50365f7d6bb | |
| parent | 3535546a86846ddb0ca5fe4a0689ac635b504459 (diff) | |
udp: honor IPV6_TCLASS cmsg for UDP/IPv4 packets
Honor the IPPROTO_IPV6-level cmsg of type IPV6_TCLASS when sending
an UDP/IPv4 packet on an AF_INET6 socket.
Reviewed by: bz
MFC after: 3 days
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D53347
| -rw-r--r-- | sys/netinet/udp_usrreq.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c index 6ce1bcce6fc6..f1d952037d5a 100644 --- a/sys/netinet/udp_usrreq.c +++ b/sys/netinet/udp_usrreq.c @@ -1208,6 +1208,23 @@ udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, error = udp_v4mapped_pktinfo(cm, &src, inp, flags); if (error != 0) break; + if (((flags & PRUS_IPV6) != 0) && + (cm->cmsg_level == IPPROTO_IPV6) && + (cm->cmsg_type == IPV6_TCLASS)) { + int tclass; + + if (cm->cmsg_len != CMSG_LEN(sizeof(int))) { + error = EINVAL; + break; + } + tclass = *(int *)CMSG_DATA(cm); + if (tclass < -1 || tclass > 255) { + error = EINVAL; + break; + } + if (tclass != -1) + tos = (u_char)tclass; + } #endif if (cm->cmsg_level != IPPROTO_IP) continue; |