sharpd: add End.B6.Encap behaviour to seg6local routes

Add End.B6.Encap support to install seg6local routes.

> ubuntu2204hwe# sharp install seg6local-routes 4004::4 nexthop-seg6local loop1 End_B6_Encap nexthop-seg6 2001::5 encap 2001:a::b:c 2001:a::d:e 1
> ubuntu2204hwe# do show ipv6 route
> [..]
> D>* 4004::4/128 [150/0] via 2001::5, loop1, seg6local End.B6.Encap nh6 2001::5, seg6 2001:a::b:c,2001:a::d:e, weight 1, 00:00:04

The uB6_Encap operation is also supported, but not displayed in the
documentation as iproute2 does not support it yet.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

diff --git a/doc/user/sharp.rst b/doc/user/sharp.rst
index c302787e44e437518835a7a64a581c91c50945cd..9afb1a2173f1b212768afce9e392e010892e5d36 100644 (file)
--- a/doc/user/sharp.rst
+++ b/doc/user/sharp.rst
@@ -202,6 +202,7 @@ keyword. At present, no sharp commands will be preserved in the config.
    router# sharp install seg6local-routes 1::8 nexthop-seg6local dum0 uA 2001::1 1
    router# sharp install seg6local-routes 1::9 nexthop-seg6local dum0 uN usid-block-length 40 usid-function-length 8 1
    router# sharp install seg6local-routes 1::10 nexthop-seg6local dum0 uA 2001::1 usid-block-length 40 usid-function-length 8 1
+   router# sharp install seg6local-routes 1::11 nexthop-seg6local dum0 End_B6_Encap nexthop-seg6 2001::5 encap 2001:a::b:c 2001:a::d:e 1
 
    router# show ipv6 route
    D>* 1::1/128 [150/0] is directly connected, dum0, seg6local End -, weight 1, 00:00:05
@@ -214,6 +215,7 @@ keyword. At present, no sharp commands will be preserved in the config.
    D>* 1::8/128 [150/0] is directly connected, dum0, seg6local End.X nh6 2001::1, weight 1, 00:01:17
    D>* 1::9/128 [150/0] is directly connected, dum0, seg6local End -, weight 1, 00:00:12
    D>* 1::10/128 [150/0] is directly connected, dum0, seg6local End.X nh6 2001::1, weight 1, 00:00:05
+   D>* 1::11/128 [150/0] is directly connected, dum0, seg6local End.B6.Encap nh6 2001::5, seg6 2001:a::b:c,2001:a::d:e, weight 1, 00:00:04
 
    bash# ip -6 route
    1::1  encap seg6local action End dev dum0 proto 194 metric 20 pref medium
@@ -226,6 +228,7 @@ keyword. At present, no sharp commands will be preserved in the config.
    1::8  encap seg6local action End.X nh6 2001::1 flavors next-csid lblen 32 nflen 16 dev dum0 proto 194 metric 20 pref medium
    1::9  encap seg6local action End flavors next-csid lblen 40 nflen 8 dev dum0 proto 194 metric 20 pref medium
    1::10  encap seg6local action End.X nh6 2001::1 flavors next-csid lblen 40 nflen 8 dev dum0 proto 194 metric 20 pref medium
+   1::11  encap seg6local action End.B6.Encaps segs 2 [ 2001:a::b:c 2001:a::d:e ] via 2001::5 dev dum0 proto 194 metric 20 pref medium
 
 
 .. clicmd:: show sharp segment-routing srv6

diff --git a/sharpd/sharp_vty.c b/sharpd/sharp_vty.c
index 138e713b2c0074ea49f28a99a2cd5c1e462bb0c0..fd36e8898eee12d53ff8af3452877b2ce007e2d8 100644 (file)
--- a/sharpd/sharp_vty.c
+++ b/sharpd/sharp_vty.c
@@ -439,6 +439,103 @@ DEFPY (install_seg6_routes,
        return CMD_SUCCESS;
 }
 
+DEFPY(install_seg6local_segs_routes, install_seg6local_segs_routes_cmd,
+      "sharp install seg6local-routes [vrf NAME$vrf_name]\
+         X:X::X:X$start6\
+         nexthop-seg6local NAME$seg6l_oif\
+         <End_B6_Encap$end_b6_encap|uB6_Encap$ub6_encap>\
+        nexthop-seg6 X:X::X:X$seg6_nh6\
+        encap X:X::X:X$seg6_seg1 X:X::X:X$seg6_seg2\
+         [usid-block-length (1-128)$lcblen] [usid-function-length (1-128)$lcfunclen] \
+         (1-1000000)$routes [repeat (2-1000)$rpt]",
+      "Sharp routing Protocol\n"
+      "install some routes\n"
+      "Routes to install\n"
+      "The vrf we would like to install into if non-default\n"
+      "The NAME of the vrf\n"
+      "v6 Address to start /32 generation at\n"
+      "Nexthop-seg6local to use\n"
+      "Output device to use\n"
+      "SRv6 End.B6.Encap function to use\n"
+      "SRv6 uB6.Encap function to use\n"
+      "Nexthop-seg6 to use\n"
+      "V6 Nexthop address to use\n"
+      "Encap mode\n"
+      "Segment List, 1st SID to use\n"
+      "Segment List, 2nd SID to use\n"
+      "uSID locator block length\n"
+      "Value in bits\n"
+      "uSID node Function length\n"
+      "Value in bits\n"
+      "How many to create\n"
+      "Should we repeat this command\n"
+      "How many times to repeat this command\n")
+{
+       struct vrf *vrf;
+       uint32_t route_flags = 0;
+       struct seg6local_context ctx = {};
+       enum seg6local_action_t action;
+       struct in6_addr seg_list[2];
+       struct in6_addr *p_seg_list = &seg_list[0];
+
+       sg.r.total_routes = routes;
+       sg.r.installed_routes = 0;
+
+       if (rpt >= 2)
+               sg.r.repeat = rpt * 2;
+       else
+               sg.r.repeat = 0;
+
+       memset(&sg.r.orig_prefix, 0, sizeof(sg.r.orig_prefix));
+       nexthop_del_srv6_seg6local(&sg.r.nhop);
+       nexthop_del_srv6_seg6(&sg.r.nhop);
+       memset(&sg.r.nhop, 0, sizeof(sg.r.nhop));
+       memset(&sg.r.nhop_group, 0, sizeof(sg.r.nhop_group));
+       memset(&sg.r.backup_nhop, 0, sizeof(sg.r.nhop));
+       memset(&sg.r.backup_nhop_group, 0, sizeof(sg.r.nhop_group));
+       sg.r.opaque[0] = '\0';
+       sg.r.inst = 0;
+       sg.r.orig_prefix.family = AF_INET6;
+       sg.r.orig_prefix.prefixlen = 128;
+       sg.r.orig_prefix.u.prefix6 = start6;
+
+       if (!vrf_name)
+               vrf_name = VRF_DEFAULT_NAME;
+
+       vrf = vrf_lookup_by_name(vrf_name);
+       if (!vrf) {
+               vty_out(vty, "The vrf NAME specified: %s does not exist\n", vrf_name);
+               return CMD_WARNING;
+       }
+
+       ctx.nh6 = seg6_nh6;
+       action = ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP;
+       if (ub6_encap) {
+               SET_SRV6_FLV_OP(ctx.flv.flv_ops, ZEBRA_SEG6_LOCAL_FLV_OP_NEXT_CSID);
+               if (lcblen)
+                       ctx.flv.lcblock_len = lcblen;
+               if (lcfunclen)
+                       ctx.flv.lcnode_func_len = lcfunclen;
+       }
+
+       sg.r.nhop.type = NEXTHOP_TYPE_IPV6_IFINDEX;
+       sg.r.nhop.gate.ipv6 = seg6_nh6;
+       sg.r.nhop.ifindex = ifname2ifindex(seg6l_oif, vrf->vrf_id);
+       sg.r.nhop.vrf_id = vrf->vrf_id;
+       sg.r.nhop_group.nexthop = &sg.r.nhop;
+       nexthop_add_srv6_seg6local(&sg.r.nhop, action, &ctx);
+       sg.r.nhop_group.nexthop = &sg.r.nhop;
+       seg_list[0] = seg6_seg1;
+       seg_list[1] = seg6_seg2;
+       nexthop_add_srv6_seg6(&sg.r.nhop, p_seg_list, 2);
+
+       sg.r.vrf_id = vrf->vrf_id;
+       sharp_install_routes_helper(&sg.r.orig_prefix, sg.r.vrf_id, sg.r.inst, 0, &sg.r.nhop_group,
+                                   &sg.r.backup_nhop_group, routes, route_flags, sg.r.opaque);
+
+       return CMD_SUCCESS;
+}
+
 DEFPY (install_seg6local_routes,
        install_seg6local_routes_cmd,
        "sharp install seg6local-routes [vrf NAME$vrf_name]\
@@ -1555,6 +1652,7 @@ void sharp_vty_init(void)
        install_element(ENABLE_NODE, &install_routes_cmd);
        install_element(ENABLE_NODE, &install_seg6_routes_cmd);
        install_element(ENABLE_NODE, &install_seg6local_routes_cmd);
+       install_element(ENABLE_NODE, &install_seg6local_segs_routes_cmd);
        install_element(ENABLE_NODE, &remove_routes_cmd);
        install_element(ENABLE_NODE, &vrf_label_cmd);
        install_element(ENABLE_NODE, &sharp_nht_data_dump_cmd);