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

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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🅰️🅱️c 2001🅰️: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🅰️🅱️c,2001🅰️: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>
This commit is contained in:
Philippe Guibert 2025-04-09 11:42:47 +02:00
parent 426f861268
commit cb8d0e125c
2 changed files with 101 additions and 0 deletions
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3
doc/user/sharp.rst
View file

@ -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

98
sharpd/sharp_vty.c
View file

@ -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);