On Thu, Nov 14, 2019 at 5:10 PM Lorenzo Bianconi <lorenzo.bianc...@redhat.com> wrote: > > Introduce support for Route Info Option sent in Router > Advertisement according to RFC 4191. Route Info Option are > configured providing route_info in ipv6_ra_configs column of > Logical_Router_Port table. route_info is a comma separated string > where each field provides PRF and prefix for a given route > (e.g: HIGH-aef1::11/48,LOW-aef2::11/96) > > Signed-off-by: Lorenzo Bianconi <lorenzo.bianc...@redhat.com> > --- > controller/pinctrl.c | 80 ++++++++++++++++++++++++++++++++++++++++++++ > lib/ovn-l7.h | 12 +++++++ > northd/ovn-northd.c | 6 ++++ > ovn-nb.xml | 14 ++++++++ > tests/ovn.at | 32 ++++++++++++------ > 5 files changed, 133 insertions(+), 11 deletions(-) > > diff --git a/controller/pinctrl.c b/controller/pinctrl.c > index b736b60ad..51c7f8a36 100644 > --- a/controller/pinctrl.c > +++ b/controller/pinctrl.c > @@ -2195,6 +2195,7 @@ struct ipv6_ra_config { > struct in6_addr rdnss; > bool has_rdnss; > struct ds dnssl; > + struct ds route_info; > }; > > struct ipv6_ra_state { > @@ -2217,6 +2218,7 @@ ipv6_ra_config_delete(struct ipv6_ra_config *config) > if (config) { > destroy_lport_addresses(&config->prefixes); > ds_destroy(&config->dnssl); > + ds_destroy(&config->route_info); > free(config); > } > } > @@ -2256,6 +2258,7 @@ ipv6_ra_update_config(const struct sbrec_port_binding > *pb) > config->mtu = smap_get_int(&pb->options, "ipv6_ra_mtu", ND_MTU_DEFAULT); > config->la_flags = IPV6_ND_RA_OPT_PREFIX_ON_LINK; > ds_init(&config->dnssl); > + ds_init(&config->route_info); > > const char *address_mode = smap_get(&pb->options, > "ipv6_ra_address_mode"); > if (!address_mode) { > @@ -2313,6 +2316,11 @@ ipv6_ra_update_config(const struct sbrec_port_binding > *pb) > ds_put_buffer(&config->dnssl, dnssl, strlen(dnssl)); > } > > + const char *route_info = smap_get(&pb->options, "ipv6_ra_route_info"); > + if (route_info) { > + ds_put_buffer(&config->route_info, route_info, strlen(route_info)); > + } > + > return config; > > fail: > @@ -2420,6 +2428,74 @@ packet_put_ra_dnssl_opt(struct dp_packet *b, ovs_be32 > lifetime, > prev_l4_size + size)); > } > > +static void > +packet_put_ra_route_info_opt(struct dp_packet *b, ovs_be32 lifetime, > + char *route_list) > +{ > + size_t prev_l4_size = dp_packet_l4_size(b); > + struct ip6_hdr *nh = dp_packet_l3(b); > + char *t0, *r0 = NULL; > + size_t size = 0; > + > + for (t0 = strtok_r(route_list, ",", &r0); t0; > + t0 = strtok_r(NULL, ",", &r0)) { > + struct ovs_nd_route_info *nd_rinfo = > + dp_packet_put_uninit(b, sizeof *nd_rinfo);
Let's say user has configured this option as "HIGH-foo". In this case, dp_packet_put_uninit will reserve sizeof *nd_rinfo bytes in the packet, but since validation fails, this function returns without adding route info to the packet and the packet is sent with invalid data. I think it's better to call dp_packet_put after the validation. Thanks Numan > + 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; > + nd_rinfo->route_lifetime = lifetime; > + > + 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)) { > + return; > + } > + if (!route.n_ipv6_addrs) { > + destroy_lport_addresses(&route); > + return; > + } > + > + nd_rinfo->prefix_len = route.ipv6_addrs->plen; > + plen = DIV_ROUND_UP(nd_rinfo->prefix_len, 64); > + nd_rinfo->len = 1 + plen; > + dp_packet_put(b, &route.ipv6_addrs->network, plen * 8); > + size += sizeof *nd_rinfo + plen * 8; > + > + destroy_lport_addresses(&route); > + index = 0; > + break; > + } > + default: > + return; > + } > + } > + } > + > + nh->ip6_plen = htons(prev_l4_size + 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)); > +} > + > /* Called with in the pinctrl_handler thread context. */ > static long long int > ipv6_ra_send(struct rconn *swconn, struct ipv6_ra_state *ra) > @@ -2459,6 +2535,10 @@ ipv6_ra_send(struct rconn *swconn, struct > ipv6_ra_state *ra) > packet_put_ra_dnssl_opt(&packet, htonl(0xffffffff), > ra->config->dnssl.string); > } > + if (ra->config->route_info.length) { > + packet_put_ra_route_info_opt(&packet, htonl(0xffffffff), > + ra->config->route_info.string); > + } > > uint64_t ofpacts_stub[4096 / 8]; > struct ofpbuf ofpacts = OFPBUF_STUB_INITIALIZER(ofpacts_stub); > diff --git a/lib/ovn-l7.h b/lib/ovn-l7.h > index fd898b0dc..ae6dbfdfb 100644 > --- a/lib/ovn-l7.h > +++ b/lib/ovn-l7.h > @@ -242,6 +242,18 @@ struct ovs_nd_dnssl { > }; > BUILD_ASSERT_DECL(ND_DNSSL_OPT_LEN == sizeof(struct ovs_nd_dnssl)); > > +/* Route Information option RFC 4191 */ > +#define ND_OPT_ROUTE_INFO 24 > +#define ND_ROUTE_INFO_OPT_LEN 8 > +struct ovs_nd_route_info { > + u_int8_t type; /* ND_OPT_ROUTE_INFO */ > + u_int8_t len; /* 1, 2 or 3 */ > + u_int8_t prefix_len; > + u_int8_t flags; > + ovs_be32 route_lifetime; > +}; > +BUILD_ASSERT_DECL(ND_ROUTE_INFO_OPT_LEN == sizeof(struct ovs_nd_route_info)); > + > #define DHCPV6_DUID_LL 3 > #define DHCPV6_HW_TYPE_ETH 1 > > diff --git a/northd/ovn-northd.c b/northd/ovn-northd.c > index a1eaa9071..8785cbbf3 100644 > --- a/northd/ovn-northd.c > +++ b/northd/ovn-northd.c > @@ -6764,6 +6764,12 @@ copy_ra_to_sb(struct ovn_port *op, const char > *address_mode) > smap_add(&options, "ipv6_ra_prf", prf); > } > > + const char *route_info = smap_get(&op->nbrp->ipv6_ra_configs, > + "route_info"); > + if (route_info) { > + smap_add(&options, "ipv6_ra_route_info", route_info); > + } > + > sbrec_port_binding_set_options(op->sb, &options); > smap_destroy(&options); > } > diff --git a/ovn-nb.xml b/ovn-nb.xml > index 89d23ad7b..5f7ec76ee 100644 > --- a/ovn-nb.xml > +++ b/ovn-nb.xml > @@ -1871,6 +1871,20 @@ > </ul> > </column> > > + <column name="ipv6_ra_configs" key="route_info"> > + Route Info is used to configure Route Info Option sent in Router > + Advertisment according to RFC 4191. Route Info is a comma > + separated string where each field provides PRF and prefix for a > + given route (e.g: HIGH-aef1::11/48,LOW-aef2::11/96) > + Possible PRF values are: > + > + <ul> > + <li>HIGH: mapped to 0x01 in RA PRF field</li> > + <li>MEDIUM: mapped to 0x00 in RA PRF field</li> > + <li>LOW: mapped to 0x11 in RA PRF field</li> > + </ul> > + </column> > + > <column name="ipv6_ra_configs" key="mtu"> > The recommended MTU for the link. Default is 0, which means no MTU > Option will be included in RA packet replied by ovn-controller. > diff --git a/tests/ovn.at b/tests/ovn.at > index 85d539c78..6c14a40b0 100644 > --- a/tests/ovn.at > +++ b/tests/ovn.at > @@ -11433,14 +11433,15 @@ construct_expected_ra() { > local ra_mo=$2 > local rdnss=$3 > local dnssl=$4 > - local ra_prefix_la=$5 > + local route_info=$5 > + local ra_prefix_la=$6 > > local slla=0101${src_mac} > local mtu_opt="" > if test $mtu != 0; then > mtu_opt=05010000${mtu} > fi > - shift 5 > + shift 6 > > local prefix="" > while [[ $# -gt 0 ]] ; do > @@ -11458,8 +11459,12 @@ construct_expected_ra() { > if test $dnssl != 0; then > dnssl_opt=1f030000ffffffff${dnssl} > fi > + local route_info_opt="" > + if test $route_info != 0; then > + route_info_opt=${route_info} > + fi > > - local > ra=ff${ra_mo}ffff0000000000000000${slla}${mtu_opt}${prefix}${rdnss_opt}${dnssl_opt} > + local > ra=ff${ra_mo}ffff0000000000000000${slla}${mtu_opt}${prefix}${rdnss_opt}${dnssl_opt}${route_info_opt} > local icmp=8600XXXX${ra} > > local ip_len=$(expr ${#icmp} / 2) > @@ -11494,38 +11499,43 @@ ra_test() { > } > > # Baseline test with no MTU > -ra_test 0 00 0 0 c0 40 aef00000000000000000000000000000 > +ra_test 0 00 0 0 0 c0 40 aef00000000000000000000000000000 > > # Now make sure an MTU option makes it > ovn-nbctl --wait=hv set Logical_Router_Port ro-sw ipv6_ra_configs:mtu=1500 > -ra_test 000005dc 00 0 0 c0 40 aef00000000000000000000000000000 > +ra_test 000005dc 00 0 0 0 c0 40 aef00000000000000000000000000000 > > # Now test for multiple network prefixes > ovn-nbctl --wait=hv set Logical_Router_port ro-sw networks='aef0\:\:1/64 > fd0f\:\:1/48' > -ra_test 000005dc 00 0 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > +ra_test 000005dc 00 0 0 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > > # Test PRF for default gw > ovn-nbctl --wait=hv set Logical_Router_port ro-sw ipv6_ra_configs:prf="LOW" > -ra_test 000005dc 18 0 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > +ra_test 000005dc 18 0 0 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > > # Now test for RDNSS > ovn-nbctl --wait=hv set Logical_Router_port ro-sw > ipv6_ra_configs:rdnss='aef0::11' > dns_addr=aef00000000000000000000000000011 > -ra_test 000005dc 18 $dns_addr 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > +ra_test 000005dc 18 $dns_addr 0 0 c0 40 aef00000000000000000000000000000 30 > fd0f0000000000000000000000000000 > > # Now test for DNSSL > ovn-nbctl --wait=hv set Logical_Router_port ro-sw > ipv6_ra_configs:dnssl="aa.bb.cc" > ovn-nbctl --wait=hv set Logical_Router_port ro-sw ipv6_ra_configs:prf="HIGH" > dnssl=02616102626202636300000000000000 > -ra_test 000005dc 08 $dns_addr $dnssl c0 40 aef00000000000000000000000000000 > 30 fd0f0000000000000000000000000000 > +ra_test 000005dc 08 $dns_addr $dnssl 0 c0 40 > aef00000000000000000000000000000 30 fd0f0000000000000000000000000000 > + > +# Now test Route Info option > +ovn-nbctl --wait=hv set Logical_Router_port ro-sw > ipv6_ra_configs:route_info="HIGH-aef1::11/48,LOW-aef2::11/96" > +route_info=18023008ffffffffaef100000000000018036018ffffffffaef20000000000000000000000000000 > +ra_test 000005dc 08 $dns_addr $dnssl $route_info c0 40 > aef00000000000000000000000000000 30 fd0f0000000000000000000000000000 > > ## Test a different address mode now > ovn-nbctl --wait=hv set Logical_Router_Port ro-sw > ipv6_ra_configs:address_mode=dhcpv6_stateful > -ra_test 000005dc 88 $dns_addr $dnssl 80 40 aef00000000000000000000000000000 > 30 fd0f0000000000000000000000000000 > +ra_test 000005dc 88 $dns_addr $dnssl $route_info 80 40 > aef00000000000000000000000000000 30 fd0f0000000000000000000000000000 > > # And the other address mode > ovn-nbctl --wait=hv set Logical_Router_Port ro-sw > ipv6_ra_configs:address_mode=dhcpv6_stateless > -ra_test 000005dc 48 $dns_addr $dnssl c0 40 aef00000000000000000000000000000 > 30 fd0f0000000000000000000000000000 > +ra_test 000005dc 48 $dns_addr $dnssl $route_info c0 40 > aef00000000000000000000000000000 30 fd0f0000000000000000000000000000 > > OVN_CLEANUP([hv1],[hv2]) > AT_CLEANUP > -- > 2.21.0 > > _______________________________________________ > dev mailing list > d...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-dev > _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev