Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 57 insertions, 0 deletions

diff --git a/isisd/isis_flags.h b/isisd/isis_flags.h
new file mode 100644
index 0000000..47a1356
--- /dev/null
+++ b/isisd/isis_flags.h
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * IS-IS Rout(e)ing protocol - isis_flags.h
+ *                             Routines for manipulation of SSN and SRM flags
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology
+ *                           Institute of Communications Engineering
+ */
+
+#ifndef _ZEBRA_ISIS_FLAGS_H
+#define _ZEBRA_ISIS_FLAGS_H
+
+/* The grand plan is to support 1024 circuits so we have 32*32 bit flags
+ * the support will be achived using the newest drafts */
+#define ISIS_MAX_CIRCUITS 32 /* = 1024 */
+
+/*
+ * Flags structure for SSN and SRM flags
+ */
+struct flags {
+	int maxindex;
+	struct list *free_idcs;
+};
+
+void flags_initialize(struct flags *flags);
+long int flags_get_index(struct flags *flags);
+void flags_free_index(struct flags *flags, long int index);
+int flags_any_set(uint32_t *flags);
+
+#define _ISIS_SET_FLAG(F, C)                                                   \
+	{                                                                      \
+		F[(C) >> 5] |= (1 << ((C)&0x1F));                              \
+	}
+#define ISIS_SET_FLAG(F, C) _ISIS_SET_FLAG(F, C->idx)
+
+#define _ISIS_CLEAR_FLAG(F, C)                                                 \
+	{                                                                      \
+		F[(C) >> 5] &= ~(1 << ((C)&0x1F));                             \
+	}
+#define ISIS_CLEAR_FLAG(F, C) _ISIS_CLEAR_FLAG(F, C->idx)
+
+#define _ISIS_CHECK_FLAG(F, C)  (F[(C)>>5] & (1<<((C) & 0x1F)))
+#define ISIS_CHECK_FLAG(F, C) _ISIS_CHECK_FLAG(F, C->idx)
+
+/* sets all u_32int_t flags to 1 */
+#define ISIS_FLAGS_SET_ALL(FLAGS)                                              \
+	{                                                                      \
+		memset(FLAGS, 0xFF, ISIS_MAX_CIRCUITS * 4);                    \
+	}
+
+#define ISIS_FLAGS_CLEAR_ALL(FLAGS)                                            \
+	{                                                                      \
+		memset(FLAGS, 0x00, ISIS_MAX_CIRCUITS * 4);                    \
+	}
+
+#endif /* _ZEBRA_ISIS_FLAGS_H */