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[37.182.17.113]) by smtp.gmail.com with ESMTPSA id m6sm17738907wrw.54.2022.02.01.09.59.45 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Feb 2022 09:59:45 -0800 (PST) From: Lorenzo Bianconi To: ovs-dev@openvswitch.org Date: Tue, 1 Feb 2022 18:59:36 +0100 Message-Id: <29b75921d858bbd5372ccb33a80879f4ebfee6b8.1643738069.git.lorenzo.bianconi@redhat.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lorenzo.bianconi@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Subject: [ovs-dev] [PATCH ovn] introduce rdnss, dnssl and route_info opt in put_nd_ra_opts action X-BeenThere: ovs-dev@openvswitch.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: ovs-dev-bounces@openvswitch.org Sender: "dev" Send non-periodic Router Advertisement with rdnss, dnssl and route_info options if configured by the user. Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=1851788 Signed-off-by: Lorenzo Bianconi --- controller/pinctrl.c | 37 ++--------- include/ovn/actions.h | 1 + lib/actions.c | 144 ++++++++++++++++++++++++++++++++++++++++++ lib/ovn-l7.h | 3 + northd/northd.c | 16 +++++ tests/ovn.at | 30 +++++++-- 6 files changed, 197 insertions(+), 34 deletions(-) diff --git a/controller/pinctrl.c b/controller/pinctrl.c index d2bb7f441..247d53d8c 100644 --- a/controller/pinctrl.c +++ b/controller/pinctrl.c @@ -3705,38 +3705,17 @@ static void packet_put_ra_dnssl_opt(struct dp_packet *b, ovs_be32 lifetime, char *dnssl_data) { - char *dnssl_list, *t0, *r0 = NULL, dnssl[255] = {}; size_t prev_l4_size = dp_packet_l4_size(b); size_t size = sizeof(struct ovs_nd_dnssl); - int i = 0; + char dnssl[255] = {}; + int dnssl_size; - dnssl_list = xstrdup(dnssl_data); - - /* Multiple DNS Search List must be 'comma' separated - * (e.g. "a.b.c, d.e.f"). Domain names must be encoded - * as described in Section 3.1 of RFC1035. - * (e.g if dns list is a.b.c,www.ovn.org, it will be encoded as: - * 01 61 01 62 01 63 00 03 77 77 77 03 6f 76 63 03 6f 72 67 00 - */ - for (t0 = strtok_r(dnssl_list, ",", &r0); t0; - t0 = strtok_r(NULL, ",", &r0)) { - char *t1, *r1 = NULL; - - size += strlen(t0) + 2; - if (size > sizeof(dnssl)) { - goto out; - } - - for (t1 = strtok_r(t0, ".", &r1); t1; - t1 = strtok_r(NULL, ".", &r1)) { - dnssl[i++] = strlen(t1); - memcpy(&dnssl[i], t1, strlen(t1)); - i += strlen(t1); - } - dnssl[i++] = 0; + dnssl_size = encode_ra_dnssl_opt(dnssl_data, dnssl, sizeof(dnssl)); + if (dnssl_size < 0) { + return; } - size = ROUND_UP(size, 8); + size += dnssl_size; struct ip6_hdr *nh = dp_packet_l3(b); nh->ip6_plen = htons(prev_l4_size + size); @@ -3746,15 +3725,13 @@ packet_put_ra_dnssl_opt(struct dp_packet *b, ovs_be32 lifetime, nd_dnssl->reserved = 0; put_16aligned_be32(&nd_dnssl->lifetime, lifetime); - dp_packet_put(b, dnssl, size - sizeof *nd_dnssl); + dp_packet_put(b, dnssl, dnssl_size); struct ovs_ra_msg *ra = dp_packet_l4(b); ra->icmph.icmp6_cksum = 0; uint32_t icmp_csum = packet_csum_pseudoheader6(dp_packet_l3(b)); ra->icmph.icmp6_cksum = csum_finish(csum_continue(icmp_csum, ra, prev_l4_size + size)); -out: - free(dnssl_list); } static void diff --git a/include/ovn/actions.h b/include/ovn/actions.h index cdef5fb03..0641b927e 100644 --- a/include/ovn/actions.h +++ b/include/ovn/actions.h @@ -807,5 +807,6 @@ void ovnacts_encode(const struct ovnact[], size_t ovnacts_len, void ovnacts_free(struct ovnact[], size_t ovnacts_len); char *ovnact_op_to_string(uint32_t); +int encode_ra_dnssl_opt(char *data, char *buf, int buf_len); #endif /* ovn/actions.h */ diff --git a/lib/actions.c b/lib/actions.c index d5d8391bb..0d3f78704 100644 --- a/lib/actions.c +++ b/lib/actions.c @@ -40,6 +40,7 @@ #include "simap.h" #include "uuid.h" #include "socket-util.h" +#include "lib/ovn-util.h" VLOG_DEFINE_THIS_MODULE(actions); @@ -2992,6 +2993,15 @@ parse_put_nd_ra_opts(struct action_context *ctx, const struct expr_field *dst, case ND_OPT_MTU: ok = c->format == LEX_F_DECIMAL; break; + + case ND_OPT_RDNSS: + ok = c->format == LEX_F_IPV6; + break; + + case ND_OPT_ROUTE_INFO_TYPE: + case ND_OPT_DNSSL: + ok = !!c->string; + break; } if (!ok) { @@ -3022,6 +3032,98 @@ format_PUT_ND_RA_OPTS(const struct ovnact_put_opts *po, format_put_opts("put_nd_ra_opts", po, s); } +int encode_ra_dnssl_opt(char *data, char *buf, int buf_len) +{ + char *t0, *r0 = NULL; + size_t size = 0; + int i = 0; + + /* Multiple DNS Search List must be 'comma' separated + * (e.g. "a.b.c, d.e.f"). Domain names must be encoded + * as described in Section 3.1 of RFC1035. + * (e.g if dns list is a.b.c,www.ovn.org, it will be encoded as: + * 01 61 01 62 01 63 00 03 77 77 77 03 6f 76 63 03 6f 72 67 00 + */ + for (t0 = strtok_r(data, ",", &r0); t0; + t0 = strtok_r(NULL, ",", &r0)) { + char *t1, *r1 = NULL; + + size += strlen(t0) + 2; + if (size > buf_len) { + return -EINVAL; + } + + for (t1 = strtok_r(t0, ".", &r1); t1; + t1 = strtok_r(NULL, ".", &r1)) { + buf[i++] = strlen(t1); + memcpy(&buf[i], t1, strlen(t1)); + i += strlen(t1); + } + buf[i++] = 0; + } + + return ROUND_UP(size, 8); +} + +static void +encode_ra_route_info_opt(struct ofpbuf *ofpacts, char *route_data) +{ + char *t0, *r0 = NULL; + + for (t0 = strtok_r(route_data, ",", &r0); t0; + t0 = strtok_r(NULL, ",", &r0)) { + struct ovs_nd_route_info nd_rinfo; + char *t1, *r1 = NULL; + int index; + + for (t1 = strtok_r(t0, "-", &r1), index = 0; t1; + t1 = strtok_r(NULL, "-", &r1), index++) { + + nd_rinfo.type = ND_OPT_ROUTE_INFO_TYPE; + nd_rinfo.route_lifetime = htonl(0xffffffff); + + switch (index) { + case 0: + if (!strcmp(t1, "HIGH")) { + nd_rinfo.flags = IPV6_ND_RA_OPT_PRF_HIGH; + } else if (!strcmp(t1, "LOW")) { + nd_rinfo.flags = IPV6_ND_RA_OPT_PRF_LOW; + } else { + nd_rinfo.flags = IPV6_ND_RA_OPT_PRF_NORMAL; + } + break; + case 1: { + struct lport_addresses route; + uint8_t plen; + + if (!extract_ip_addresses(t1, &route)) { + break; + } + if (!route.n_ipv6_addrs) { + destroy_lport_addresses(&route); + break; + } + + nd_rinfo.prefix_len = route.ipv6_addrs->plen; + plen = DIV_ROUND_UP(nd_rinfo.prefix_len, 64); + nd_rinfo.len = 1 + plen; + struct ovs_nd_route_info *rinfo_opt = + ofpbuf_put_uninit(ofpacts, sizeof *rinfo_opt); + memcpy(rinfo_opt, &nd_rinfo, sizeof *rinfo_opt); + void *data = ofpbuf_put_uninit(ofpacts, plen * 8); + memcpy(data, &route.ipv6_addrs->network, plen * 8); + + destroy_lport_addresses(&route); + index = 0; + break; + } + default: + break; + } + } + } +} + static void encode_put_nd_ra_option(const struct ovnact_gen_option *o, struct ofpbuf *ofpacts, ptrdiff_t ra_offset) @@ -3096,6 +3198,48 @@ encode_put_nd_ra_option(const struct ovnact_gen_option *o, sizeof(ovs_be32[4])); break; } + + case ND_OPT_RDNSS: + { + struct nd_rdnss_opt *rdnss_opt = + ofpbuf_put_uninit(ofpacts, sizeof *rdnss_opt); + rdnss_opt->type = ND_OPT_RDNSS; + rdnss_opt->len = 3; + rdnss_opt->reserved = htons(0); + put_16aligned_be32(&rdnss_opt->lifetime, htonl(0xffffffff)); + void *dns = ofpbuf_put_uninit(ofpacts, sizeof(ovs_be32[4])); + memcpy(dns, &c->value.be128[7].be32, sizeof(ovs_be32[4])); + break; + } + + case ND_OPT_DNSSL: + { + size_t size = sizeof(struct ovs_nd_dnssl); + char dnssl[255] = {}; + int dnssl_size; + + dnssl_size = encode_ra_dnssl_opt(c->string, dnssl, sizeof(dnssl)); + if (dnssl_size < 0) { + break; + } + + size += dnssl_size; + struct ovs_nd_dnssl *nd_dnssl = + ofpbuf_put_uninit(ofpacts, sizeof *nd_dnssl); + nd_dnssl->type = ND_OPT_DNSSL; + nd_dnssl->len = size / 8; + nd_dnssl->reserved = 0; + put_16aligned_be32(&nd_dnssl->lifetime, htonl(0xffffffff)); + void *p = ofpbuf_put_uninit(ofpacts, dnssl_size); + memcpy(p, dnssl, dnssl_size); + break; + } + + case ND_OPT_ROUTE_INFO_TYPE: + { + encode_ra_route_info_opt(ofpacts, c->string); + break; + } } } diff --git a/lib/ovn-l7.h b/lib/ovn-l7.h index 256e963d9..49ecea81f 100644 --- a/lib/ovn-l7.h +++ b/lib/ovn-l7.h @@ -409,6 +409,9 @@ nd_ra_opts_init(struct hmap *nd_ra_opts) nd_ra_opt_add(nd_ra_opts, "slla", ND_OPT_SOURCE_LINKADDR, "mac"); nd_ra_opt_add(nd_ra_opts, "prefix", ND_OPT_PREFIX_INFORMATION, "ipv6"); nd_ra_opt_add(nd_ra_opts, "mtu", ND_OPT_MTU, "uint32"); + nd_ra_opt_add(nd_ra_opts, "rdnss", ND_OPT_RDNSS, "ipv6"); + nd_ra_opt_add(nd_ra_opts, "dnssl", ND_OPT_DNSSL, "str"); + nd_ra_opt_add(nd_ra_opts, "route_info", ND_OPT_ROUTE_INFO_TYPE, "str"); } #define EMPTY_LB_VIP 1 diff --git a/northd/northd.c b/northd/northd.c index fc7a64f99..861812259 100644 --- a/northd/northd.c +++ b/northd/northd.c @@ -10855,6 +10855,22 @@ build_ND_RA_flows_for_lrouter_port( ds_put_format(actions, ", router_preference = \"%s\"", prf); } + const char *ra_rdnss = smap_get(&op->nbrp->ipv6_ra_configs, "rdnss"); + if (ra_rdnss) { + ds_put_format(actions, ", rdnss = %s", ra_rdnss); + } + + const char *ra_dnssl = smap_get(&op->nbrp->ipv6_ra_configs, "dnssl"); + if (ra_dnssl) { + ds_put_format(actions, ", dnssl = \"%s\"", ra_dnssl); + } + + const char *route_info = smap_get(&op->nbrp->ipv6_ra_configs, + "route_info"); + if (route_info) { + ds_put_format(actions, ", route_info = \"%s\"", route_info); + } + bool add_rs_response_flow = false; for (size_t i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { diff --git a/tests/ovn.at b/tests/ovn.at index 957eb7850..33685109f 100644 --- a/tests/ovn.at +++ b/tests/ovn.at @@ -11902,9 +11902,10 @@ options:rxq_pcap=${pcap_file}-rx.pcap OVS_WAIT_UNTIL([test 1 = `as hv1 ovs-ofctl dump-flows br-int | grep -c "ipv6_dst=ff02::2,nw_ttl=255,icmp_type=133,icmp_code=0"`]) # This shell function sends a Router Solicitation packet. -# test_ipv6_ra INPORT SRC_MAC SRC_LLA ADDR_MODE MTU RA_PREFIX_OPT +# test_ipv6_ra INPORT SRC_MAC SRC_LLA ADDR_MODE MTU RA_PREFIX_OPT RDNSS DNSSL ROUTE_INFO test_ipv6_ra() { local inport=$1 src_mac=$2 src_lla=$3 addr_mode=$4 mtu=$5 prefix_opt=$6 + local rdnss=$7 dnssl=$8 route_info=$9 local request=333300000002${src_mac}86dd6000000000103aff${src_lla}ff02000000000000000000000000000285000efc000000000101${src_mac} local len=24 @@ -11914,6 +11915,18 @@ test_ipv6_ra() { mtu_opt=05010000${mtu} fi + if test ${#rdnss} != 0; then + len=`expr $len + ${#rdnss} / 2` + fi + + if test ${#dnssl} != 0; then + len=`expr $len + ${#dnssl} / 2` + fi + + if test ${#route_info} != 0; then + len=`expr $len + ${#route_info} / 2` + fi + if test ${#prefix_opt} != 0; then prefix_opt=${prefix_opt}fdad1234567800000000000000000000 len=`expr $len + ${#prefix_opt} / 2` @@ -11922,7 +11935,7 @@ test_ipv6_ra() { len=$(printf "%x" $len) local lrp_mac=fa163e000001 local lrp_lla=fe80000000000000f8163efffe000001 - local reply=${src_mac}${lrp_mac}86dd6000000000${len}3aff${lrp_lla}${src_lla}8600XXXXff${addr_mode}ffff00000000000000000101${lrp_mac}${mtu_opt}${prefix_opt} + local reply=${src_mac}${lrp_mac}86dd6000000000${len}3aff${lrp_lla}${src_lla}8600XXXXff${addr_mode}ffff00000000000000000101${lrp_mac}${mtu_opt}${rdnss}${dnssl}${route_info}${prefix_opt} echo $reply >> $inport.expected as hv1 ovs-appctl netdev-dummy/receive hv1-vif${inport} $request @@ -11960,6 +11973,9 @@ reset_pcap_file hv1-vif3 hv1/vif3 ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:mtu=1500 ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:send_periodic="false" ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:router_preference="LOW" +ovn-nbctl --wait=hv set Logical_Router_port lrp0 ipv6_ra_configs:rdnss=1000::11 +ovn-nbctl --wait=hv set Logical_Router_port lrp0 ipv6_ra_configs:dnssl=aa.bb.cc +ovn-nbctl --wait=hv set Logical_Router_port lrp0 ipv6_ra_configs:route_info=HIGH-1001::11/48,LOW-1002::11/96 # Make sure that ovn-controller has installed the corresponding OF Flow. OVS_WAIT_UNTIL([test 1 = `as hv1 ovs-ofctl dump-flows br-int | grep -c "ipv6_dst=ff02::2,nw_ttl=255,icmp_type=133,icmp_code=0"`]) @@ -11970,8 +11986,11 @@ default_prefix_option_config=030440c0ffffffffffffffff00000000 src_mac=fa163e000003 src_lla=fe80000000000000f8163efffe000003 mtu=000005dc +rdnss=19030000ffffffff10000000000000000000000000000011 +dnssl=1f030000ffffffff02616102626202636300000000000000 +route_info=18023008ffffffff100100000000000018036018ffffffff10020000000000000000000000000000 -test_ipv6_ra 2 $src_mac $src_lla $addr_mode $mtu $default_prefix_option_config +test_ipv6_ra 2 $src_mac $src_lla $addr_mode $mtu $default_prefix_option_config $rdnss $dnssl $route_info # NXT_RESUME should be 2. OVS_WAIT_UNTIL([test 2 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`]) @@ -11993,6 +12012,8 @@ reset_pcap_file hv1-vif3 hv1/vif3 # Set the address mode to dhcpv6_stateful, router_preference to HIGH ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:address_mode=dhcpv6_stateful ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:router_preference="HIGH" +ovn-nbctl --wait=hv remove Logical_Router_Port lrp0 ipv6_ra_configs rdnss +ovn-nbctl --wait=hv remove Logical_Router_Port lrp0 ipv6_ra_configs route_info # Make sure that ovn-controller has installed the corresponding OF Flow. OVS_WAIT_UNTIL([test 1 = `as hv1 ovs-ofctl dump-flows br-int | grep -c "ipv6_dst=ff02::2,nw_ttl=255,icmp_type=133,icmp_code=0"`]) @@ -12003,7 +12024,7 @@ src_mac=fa163e000004 src_lla=fe80000000000000f8163efffe000004 mtu=000005dc -test_ipv6_ra 3 $src_mac $src_lla $addr_mode $mtu $default_prefix_option_config +test_ipv6_ra 3 $src_mac $src_lla $addr_mode $mtu $default_prefix_option_config "" $dnssl # NXT_RESUME should be 3. OVS_WAIT_UNTIL([test 3 = `cat ofctl_monitor*.log | grep -c NXT_RESUME`]) @@ -12025,6 +12046,7 @@ reset_pcap_file hv1-vif3 hv1/vif3 # Set the address mode to dhcpv6_stateless, reset router preference to default ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:address_mode=dhcpv6_stateless ovn-nbctl --wait=hv set Logical_Router_Port lrp0 ipv6_ra_configs:router_preference="MEDIUM" +ovn-nbctl --wait=hv remove Logical_Router_Port lrp0 ipv6_ra_configs dnssl # Make sure that ovn-controller has installed the corresponding OF Flow. OVS_WAIT_UNTIL([test 1 = `as hv1 ovs-ofctl dump-flows br-int | grep -c "ipv6_dst=ff02::2,nw_ttl=255,icmp_type=133,icmp_code=0"`])