Date: Mon, 10 May 2021 14:32:49 GMT From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: b7622437f5fb - stable/13 - net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros Message-ID: <202105101432.14AEWnIx093014@gitrepo.freebsd.org>
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The branch stable/13 has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=b7622437f5fb6bce84b42f3607e86729ad2a84b6 commit b7622437f5fb6bce84b42f3607e86729ad2a84b6 Author: Hans Petter Selasky <hselasky@FreeBSD.org> AuthorDate: 2021-05-10 14:30:44 +0000 Commit: Hans Petter Selasky <hselasky@FreeBSD.org> CommitDate: 2021-05-10 14:30:44 +0000 net: Introduce IPV6_DSCP(), IPV6_ECN() and IPV6_TRAFFIC_CLASS() macros Introduce convenience macros to retrieve the DSCP, ECN or traffic class bits from an IPv6 header. Use them where appropriate. Reviewed by: ae (previous version), rscheff, tuexen, rgrimes Sponsored by: Rubicon Communications, LLC ("Netgate") Differential Revision: https://reviews.freebsd.org/D29056 (cherry picked from commit bb4a7d94b99fbf7f59c876ffff8ded5f6a5b5c3e) --- sys/net/altq/altq_subr.c | 2 +- sys/net/if_stf.c | 4 ++-- sys/netinet/ip6.h | 4 ++++ sys/netinet/tcp_input.c | 2 +- sys/netinet/tcp_stacks/rack_bbr_common.c | 2 +- sys/netinet6/frag6.c | 5 ++--- sys/netinet6/in6_gif.c | 2 +- sys/netinet6/ip6_output.c | 4 ++-- sys/netinet6/sctp6_usrreq.c | 2 +- sys/netpfil/pf/pf.c | 2 +- 10 files changed, 16 insertions(+), 13 deletions(-) diff --git a/sys/net/altq/altq_subr.c b/sys/net/altq/altq_subr.c index 9d998c40485c..ba1d3af5f5fd 100644 --- a/sys/net/altq/altq_subr.c +++ b/sys/net/altq/altq_subr.c @@ -1063,7 +1063,7 @@ altq_extractflow(m, af, flow, filt_bmask) fin6->fi6_family = AF_INET6; fin6->fi6_proto = ip6->ip6_nxt; - fin6->fi6_tclass = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + fin6->fi6_tclass = IPV6_TRAFFIC_CLASS(ip6); fin6->fi6_flowlabel = ip6->ip6_flow & htonl(0x000fffff); fin6->fi6_src = ip6->ip6_src; diff --git a/sys/net/if_stf.c b/sys/net/if_stf.c index c3f26db3f6e6..40f8a6f3a30a 100644 --- a/sys/net/if_stf.c +++ b/sys/net/if_stf.c @@ -455,7 +455,7 @@ stf_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, } } ip6 = mtod(m, struct ip6_hdr *); - tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + tos = IPV6_TRAFFIC_CLASS(ip6); /* * Pickup the right outer dst addr from the list of candidates. @@ -665,7 +665,7 @@ in_stf_input(struct mbuf *m, int off, int proto, void *arg) return (IPPROTO_DONE); } - itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + itos = IPV6_TRAFFIC_CLASS(ip6); if ((ifp->if_flags & IFF_LINK1) != 0) ip_ecn_egress(ECN_ALLOWED, &otos, &itos); else diff --git a/sys/netinet/ip6.h b/sys/netinet/ip6.h index 44c46fd3b71d..1bc79a98e689 100644 --- a/sys/netinet/ip6.h +++ b/sys/netinet/ip6.h @@ -106,6 +106,10 @@ struct ip6_hdr { #endif #define IPV6_FLOWLABEL_LEN 20 +#define IPV6_TRAFFIC_CLASS(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0xff) +#define IPV6_DSCP(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0xfc) +#define IPV6_ECN(ip6) ((ntohl((ip6)->ip6_flow) >> 20) & 0x03) + /* * Extension Headers */ diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index eec722d8097e..b3d4ef5cf5de 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -690,7 +690,7 @@ tcp_input(struct mbuf **mp, int *offp, int proto) /* XXX stat */ goto drop; } - iptos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + iptos = IPV6_TRAFFIC_CLASS(ip6); } #endif #if defined(INET) && defined(INET6) diff --git a/sys/netinet/tcp_stacks/rack_bbr_common.c b/sys/netinet/tcp_stacks/rack_bbr_common.c index e73a3e60fd64..b86a5d85fc76 100644 --- a/sys/netinet/tcp_stacks/rack_bbr_common.c +++ b/sys/netinet/tcp_stacks/rack_bbr_common.c @@ -334,7 +334,7 @@ skip_vnet: m_freem(m); goto skipped_pkt; } - iptos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + iptos = IPV6_TRAFFIC_CLASS(ip6); break; } #endif diff --git a/sys/netinet6/frag6.c b/sys/netinet6/frag6.c index f227930743b7..1903b01e03d4 100644 --- a/sys/netinet6/frag6.c +++ b/sys/netinet6/frag6.c @@ -554,8 +554,7 @@ frag6_input(struct mbuf **mp, int *offp, int proto) q6->ip6q_ttl = IPV6_FRAGTTL; q6->ip6q_src = ip6->ip6_src; q6->ip6q_dst = ip6->ip6_dst; - q6->ip6q_ecn = - (ntohl(ip6->ip6_flow) >> 20) & IPTOS_ECN_MASK; + q6->ip6q_ecn = IPV6_ECN(ip6); q6->ip6q_unfrglen = -1; /* The 1st fragment has not arrived. */ /* Add the fragemented packet to the bucket. */ @@ -688,7 +687,7 @@ frag6_input(struct mbuf **mp, int *offp, int proto) * if CE is set, do not lose CE. * Drop if CE and not-ECT are mixed for the same packet. */ - ecn = (ntohl(ip6->ip6_flow) >> 20) & IPTOS_ECN_MASK; + ecn = IPV6_ECN(ip6); ecn0 = q6->ip6q_ecn; if (ecn == IPTOS_ECN_CE) { if (ecn0 == IPTOS_ECN_NOTECT) { diff --git a/sys/netinet6/in6_gif.c b/sys/netinet6/in6_gif.c index 33cc06d065b8..54cb81c6130f 100644 --- a/sys/netinet6/in6_gif.c +++ b/sys/netinet6/in6_gif.c @@ -344,7 +344,7 @@ in6_gif_input(struct mbuf *m, int off, int proto, void *arg) gifp = GIF2IFP(sc); if ((gifp->if_flags & IFF_UP) != 0) { ip6 = mtod(m, struct ip6_hdr *); - ecn = (ntohl(ip6->ip6_flow) >> 20) & 0xff; + ecn = IPV6_TRAFFIC_CLASS(ip6); m_adj(m, off); gif_input(m, gifp, proto, ecn); } else { diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c index 58334788b05b..2b49a9f7c351 100644 --- a/sys/netinet6/ip6_output.c +++ b/sys/netinet6/ip6_output.c @@ -656,9 +656,9 @@ again: if (opt && opt->ip6po_tclass >= 0) { int mask = 0; - if ((ip6->ip6_flow & htonl(0xfc << 20)) == 0) + if (IPV6_DSCP(ip6) == 0) mask |= 0xfc; - if ((ip6->ip6_flow & htonl(0x03 << 20)) == 0) + if (IPV6_ECN(ip6) == 0) mask |= 0x03; if (mask != 0) ip6->ip6_flow |= htonl((opt->ip6po_tclass & mask) << 20); diff --git a/sys/netinet6/sctp6_usrreq.c b/sys/netinet6/sctp6_usrreq.c index b544d2975c6a..fcf15e4f81bf 100644 --- a/sys/netinet6/sctp6_usrreq.c +++ b/sys/netinet6/sctp6_usrreq.c @@ -141,7 +141,7 @@ sctp6_input_with_port(struct mbuf **i_pak, int *offp, uint16_t port) if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { goto out; } - ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff); + ecn_bits = IPV6_TRAFFIC_CLASS(ip6); if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) { SCTP_STAT_INCR(sctps_recvhwcrc); compute_crc = 0; diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c index 20c3d160188f..815b847b6355 100644 --- a/sys/netpfil/pf/pf.c +++ b/sys/netpfil/pf/pf.c @@ -6401,7 +6401,7 @@ pf_test6(int dir, int pflags, struct ifnet *ifp, struct mbuf **m0, struct inpcb pd.sidx = (dir == PF_IN) ? 0 : 1; pd.didx = (dir == PF_IN) ? 1 : 0; pd.af = AF_INET6; - pd.tos = (ntohl(h->ip6_flow) >> 20) & 0xfc; + pd.tos = IPV6_DSCP(h); pd.tot_len = ntohs(h->ip6_plen) + sizeof(struct ip6_hdr); off = ((caddr_t)h - m->m_data) + sizeof(struct ip6_hdr);
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