isis, lib: add isis srv6 capability to ls_node

Signed-off-by: Philippe Guibert <[email protected]>
pguibert6WIND · Apr 3, 2024 · 1fe9800 · 1fe9800
1 parent a9f49ef
commit 1fe9800
Show file tree

Hide file tree

Showing 3 changed files with 21 additions and 0 deletions.
diff --git a/isisd/isis_te.c b/isisd/isis_te.c
@@ -797,6 +797,12 @@ static struct ls_vertex *lsp_to_vertex(struct ls_ted *ted, struct isis_lsp *lsp)
 				lnode.msd = cap->msd;
 				SET_FLAG(lnode.flags, LS_NODE_MSD);
 			}
+			if (cap->srv6_cap.is_srv6_capable) {
+				SET_FLAG(lnode.flags, LS_NODE_SRV6);
+				lnode.srv6_cap_flags = cap->srv6_cap.flags;
+				memcpy(&lnode.srv6_msd, &cap->srv6_msd,
+				       sizeof(struct isis_srv6_msd));
+			}
 		}
 	}
 

diff --git a/lib/link_state.c b/lib/link_state.c
@@ -140,6 +140,12 @@ int ls_node_same(struct ls_node *n1, struct ls_node *n2)
 		if (CHECK_FLAG(n1->flags, LS_NODE_MSD) && (n1->msd != n2->msd))
 			return 0;
 	}
+	if (CHECK_FLAG(n1->flags, LS_NODE_SRV6)) {
+		if (n1->srv6_cap_flags != n2->srv6_cap_flags)
+			return 0;
+		if (memcmp(&n1->srv6_msd, &n2->srv6_msd, sizeof(n1->srv6_msd)))
+			return 0;
+	}
 
 	/* OK, n1 & n2 are equal */
 	return 1;

diff --git a/lib/link_state.h b/lib/link_state.h
@@ -106,6 +106,7 @@ extern int ls_node_id_same(struct ls_node_id i1, struct ls_node_id i2);
 #define LS_NODE_SR		0x0040
 #define LS_NODE_SRLB		0x0080
 #define LS_NODE_MSD		0x0100
+#define LS_NODE_SRV6		0x0200
 
 /* Link State Node structure */
 struct ls_node {
@@ -128,6 +129,14 @@ struct ls_node {
 	} srlb;
 	uint8_t algo[LIB_LS_SR_ALGO_COUNT]; /* Segment Routing Algorithms */
 	uint8_t msd;			/* Maximum Stack Depth */
+
+	uint16_t srv6_cap_flags; /* draft-ietf-idr-bgpls-srv6-ext, 3.1., flags field */
+	struct ls_srv6_msd { /* draft-ietf-idr-bgpls-srv6-ext, 3.2. */
+		uint8_t max_seg_left_msd;
+		uint8_t max_end_pop_msd;
+		uint8_t max_h_encaps_msd;
+		uint8_t max_end_d_msd;
+	} srv6_msd;
 };
 
 /* Link State flags to indicate which Attribute parameters are valid */