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Merge pull request #18064 from cscarpitta/fix/fix_srv6_sid_parameters

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staticd: Fix SRv6 SID installation and deletion
This commit is contained in:
Donald Sharp 2025-02-13 13:37:22 -05:00 committed by GitHub
parent caeef98e73 a6d02fe2fb
commit 8a661e5152
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GPG key ID: B5690EEEBB952194
7 changed files with 131 additions and 17 deletions
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5
lib/nexthop.c
View file

@ -1153,6 +1153,7 @@ void nexthop_json_helper(json_object *json_nexthop,
json_object *json_backups = NULL;
json_object *json_seg6local = NULL;
json_object *json_seg6local_context = NULL;
json_object *json_srv6_sid_structure = NULL;
json_object *json_seg6 = NULL;
json_object *json_segs = NULL;
int i;
@ -1328,6 +1329,10 @@ void nexthop_json_helper(json_object *json_nexthop,
json_object_object_add(json_nexthop, "seg6localContext",
json_seg6local_context);
json_srv6_sid_structure = json_object_new_object();
srv6_sid_structure2json(&nexthop->nh_srv6->seg6local_ctx, json_srv6_sid_structure);
json_object_object_add(json_seg6local, "sidStructure", json_srv6_sid_structure);
if (nexthop->nh_srv6->seg6_segs &&
nexthop->nh_srv6->seg6_segs->num_segs == 1) {
json_seg6 = json_object_new_object();

8
lib/srv6.c
View file

@ -71,6 +71,14 @@ int snprintf_seg6_segs(char *str,
return strlen(str);
}
void srv6_sid_structure2json(const struct seg6local_context *ctx, json_object *json)
{
json_object_int_add(json, "blockLen", ctx->block_len);
json_object_int_add(json, "nodeLen", ctx->node_len);
json_object_int_add(json, "funcLen", ctx->function_len);
json_object_int_add(json, "argLen", ctx->argument_len);
}
void seg6local_context2json(const struct seg6local_context *ctx,
uint32_t action, json_object *json)
{

1
lib/srv6.h
View file

@ -363,6 +363,7 @@ const char *seg6local_context2str(char *str, size_t size,
uint32_t action);
void seg6local_context2json(const struct seg6local_context *ctx,
uint32_t action, json_object *json);
void srv6_sid_structure2json(const struct seg6local_context *ctx, json_object *json);
static inline const char *srv6_sid_ctx2str(char *str, size_t size,
const struct srv6_sid_ctx *ctx)

62
staticd/static_zebra.c
View file

@ -615,6 +615,9 @@ void static_zebra_srv6_sid_install(struct static_srv6_sid *sid)
struct seg6local_context ctx = {};
struct interface *ifp = NULL;
struct vrf *vrf;
struct prefix_ipv6 sid_block = {};
struct prefix_ipv6 locator_block = {};
struct prefix_ipv6 sid_locator = {};
if (!sid)
return;
@ -696,10 +699,30 @@ void static_zebra_srv6_sid_install(struct static_srv6_sid *sid)
break;
}
ctx.block_len = sid->locator->block_bits_length;
ctx.node_len = sid->locator->node_bits_length;
ctx.function_len = sid->locator->function_bits_length;
ctx.argument_len = sid->locator->argument_bits_length;
sid_block = sid->addr;
sid_block.prefixlen = sid->locator->block_bits_length;
apply_mask(&sid_block);
locator_block = sid->locator->prefix;
locator_block.prefixlen = sid->locator->block_bits_length;
apply_mask(&locator_block);
if (prefix_same(&sid_block, &locator_block))
ctx.block_len = sid->locator->block_bits_length;
else {
zlog_warn("SID block %pFX does not match locator block %pFX", &sid_block,
&locator_block);
return;
}
sid_locator = sid->addr;
sid_locator.prefixlen = sid->locator->block_bits_length + sid->locator->node_bits_length;
apply_mask(&sid_locator);
if (prefix_same(&sid_locator, &sid->locator->prefix))
ctx.node_len = sid->locator->node_bits_length;
ctx.function_len = sid->addr.prefixlen - (ctx.block_len + ctx.node_len);
/* Attach the SID to the SRv6 interface */
if (!ifp) {
@ -724,6 +747,9 @@ void static_zebra_srv6_sid_uninstall(struct static_srv6_sid *sid)
struct interface *ifp = NULL;
struct seg6local_context ctx = {};
struct vrf *vrf;
struct prefix_ipv6 sid_block = {};
struct prefix_ipv6 locator_block = {};
struct prefix_ipv6 sid_locator = {};
if (!sid)
return;
@ -803,10 +829,30 @@ void static_zebra_srv6_sid_uninstall(struct static_srv6_sid *sid)
}
}
ctx.block_len = sid->locator->block_bits_length;
ctx.node_len = sid->locator->node_bits_length;
ctx.function_len = sid->locator->function_bits_length;
ctx.argument_len = sid->locator->argument_bits_length;
sid_block = sid->addr;
sid_block.prefixlen = sid->locator->block_bits_length;
apply_mask(&sid_block);
locator_block = sid->locator->prefix;
locator_block.prefixlen = sid->locator->block_bits_length;
apply_mask(&locator_block);
if (prefix_same(&sid_block, &locator_block))
ctx.block_len = sid->locator->block_bits_length;
else {
zlog_warn("SID block %pFX does not match locator block %pFX", &sid_block,
&locator_block);
return;
}
sid_locator = sid->addr;
sid_locator.prefixlen = sid->locator->block_bits_length + sid->locator->node_bits_length;
apply_mask(&sid_locator);
if (prefix_same(&sid_locator, &sid->locator->prefix))
ctx.node_len = sid->locator->node_bits_length;
ctx.function_len = sid->addr.prefixlen - (ctx.block_len + ctx.node_len);
static_zebra_send_localsid(ZEBRA_ROUTE_DELETE, &sid->addr.prefix, sid->addr.prefixlen,
ifp->ifindex, action, &ctx);

32
tests/topotests/static_srv6_sids/expected_srv6_sids.json
View file

@ -25,7 +25,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End"
"action": "End",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 0,
"argLen": 0
}
},
"seg6localContext": {
@ -60,7 +66,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT4"
"action": "End.DT4",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 10
@ -95,7 +107,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT6"
"action": "End.DT6",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 20
@ -130,7 +148,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT46"
"action": "End.DT46",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 30

24
tests/topotests/static_srv6_sids/expected_srv6_sids_sid_delete_1.json
View file

@ -25,7 +25,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT4"
"action": "End.DT4",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 10
@ -60,7 +66,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT6"
"action": "End.DT6",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 20
@ -95,7 +107,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT46"
"action": "End.DT46",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 30

16
tests/topotests/static_srv6_sids/expected_srv6_sids_sid_delete_2.json
View file

@ -25,7 +25,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT4"
"action": "End.DT4",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 10
@ -60,7 +66,13 @@
"active": true,
"weight": 1,
"seg6local": {
"action": "End.DT46"
"action": "End.DT46",
"sidStructure": {
"blockLen": 32,
"nodeLen": 16,
"funcLen": 16,
"argLen": 0
}
},
"seg6localContext": {
"table": 30