[ovs-dev,ovn,2/2] Add support for Route Info Option in RA - RFC 4191
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Message ID a52e6e31e764cb60dd862641bf4ff3d97c2740bd.1573731441.git.lorenzo.bianconi@redhat.com
State New
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Series
  • Add support for PRF and Route Info Option in RA (RFC 4191)
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Commit Message

Lorenzo Bianconi Nov. 14, 2019, 11:38 a.m. UTC
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.bianconi@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(-)

Comments

Numan Siddique Nov. 28, 2019, 10:35 a.m. UTC | #1
On Thu, Nov 14, 2019 at 5:10 PM Lorenzo Bianconi
<lorenzo.bianconi@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.bianconi@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
> dev@openvswitch.org
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
Lorenzo Bianconi Nov. 28, 2019, 1:20 p.m. UTC | #2
> On Thu, Nov 14, 2019 at 5:10 PM Lorenzo Bianconi
> <lorenzo.bianconi@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.bianconi@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.

Hi Numan,

thx for the review. Fixed in v2.

Regards,
Lorenzo

> 
> 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
> > dev@openvswitch.org
> > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
> >
>

Patch
diff mbox series

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);
+        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