Initial revision
diff --git a/lib/smux.h b/lib/smux.h
new file mode 100644
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--- /dev/null
+++ b/lib/smux.h
@@ -0,0 +1,159 @@
+/* SNMP support
+ * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_SNMP_H
+#define _ZEBRA_SNMP_H
+
+#define SMUX_PORT_DEFAULT 199
+
+#define SMUXMAXPKTSIZE 1500
+#define SMUXMAXSTRLEN 256
+
+#define SMUX_OPEN (ASN_APPLICATION | ASN_CONSTRUCTOR | 0)
+#define SMUX_CLOSE (ASN_APPLICATION | ASN_PRIMITIVE | 1)
+#define SMUX_RREQ (ASN_APPLICATION | ASN_CONSTRUCTOR | 2)
+#define SMUX_RRSP (ASN_APPLICATION | ASN_PRIMITIVE | 3)
+#define SMUX_SOUT (ASN_APPLICATION | ASN_PRIMITIVE | 4)
+
+#define SMUX_GET (ASN_CONTEXT | ASN_CONSTRUCTOR | 0)
+#define SMUX_GETNEXT (ASN_CONTEXT | ASN_CONSTRUCTOR | 1)
+#define SMUX_GETRSP (ASN_CONTEXT | ASN_CONSTRUCTOR | 2)
+#define SMUX_SET (ASN_CONTEXT | ASN_CONSTRUCTOR | 3)
+#define SMUX_TRAP (ASN_CONTEXT | ASN_CONSTRUCTOR | 4)
+
+#define SMUX_MAX_FAILURE 3
+
+/* Structures here are mostly compatible with UCD SNMP 4.1.1 */
+#define MATCH_FAILED (-1)
+#define MATCH_SUCCEEDED 0
+
+/* SYNTAX TruthValue from SNMPv2-TC. */
+#define SNMP_TRUE 1
+#define SNMP_FALSE 2
+
+/* SYNTAX RowStatus from SNMPv2-TC. */
+#define SNMP_VALID 1
+#define SNMP_INVALID 2
+
+#define IN_ADDR_SIZE sizeof(struct in_addr)
+
+struct variable;
+
+#define REGISTER_MIB(descr, var, vartype, theoid) \
+ smux_register_mib(descr, (struct variable *)var, sizeof(struct vartype), \
+ sizeof(var)/sizeof(struct vartype), \
+ theoid, sizeof(theoid)/sizeof(oid))
+
+typedef int (WriteMethod)(int action,
+ u_char *var_val,
+ u_char var_val_type,
+ size_t var_val_len,
+ u_char *statP,
+ oid *name,
+ size_t length,
+ struct variable *v);
+
+typedef u_char *(FindVarMethod)(struct variable *v,
+ oid *name,
+ size_t *length,
+ int exact,
+ size_t *var_len,
+ WriteMethod **write_method);
+
+/* SNMP variable */
+struct variable
+{
+ /* Index of the MIB.*/
+ u_char magic;
+
+ /* Type of variable. */
+ char type;
+
+ /* Access control list. */
+ u_short acl;
+
+ /* Callback function. */
+ FindVarMethod *findVar;
+
+ /* Suffix of the MIB. */
+ u_char namelen;
+ oid name[MAX_OID_LEN];
+};
+
+/* SNMP tree. */
+struct subtree
+{
+ /* Tree's oid. */
+ oid name[MAX_OID_LEN];
+ u_char name_len;
+
+ /* List of the variables. */
+ struct variable *variables;
+
+ /* Length of the variables list. */
+ int variables_num;
+
+ /* Width of the variables list. */
+ int variables_width;
+
+ /* Registered flag. */
+ int registered;
+};
+
+struct trap_object
+{
+ FindVarMethod *findVar;
+ u_char namelen;
+ oid name[MAX_OID_LEN];
+};
+
+/* Declare SMUX return value. */
+#define SNMP_LOCAL_VARIABLES \
+ static int32_t snmp_int_val; \
+ static struct in_addr snmp_in_addr_val;
+
+#define SNMP_INTEGER(V) \
+ ( \
+ *var_len = sizeof (int32_t), \
+ snmp_int_val = V, \
+ (u_char *) &snmp_int_val \
+ )
+
+#define SNMP_IPADDRESS(V) \
+ ( \
+ *var_len = sizeof (struct in_addr), \
+ snmp_in_addr_val = V, \
+ (u_char *) &snmp_in_addr_val \
+ )
+
+void smux_init (oid [], size_t);
+void smux_start (void);
+void smux_register_mib(char *, struct variable *, size_t, int, oid [], size_t);
+int smux_header_generic (struct variable *, oid [], size_t *, int, size_t *,
+ WriteMethod **);
+int smux_trap (oid *, size_t, oid *, size_t, struct trap_object *, size_t, unsigned int);
+
+int oid_compare (oid *, int, oid *, int);
+void oid2in_addr (oid [], int, struct in_addr *);
+void *oid_copy (void *, void *, size_t);
+void oid_copy_addr (oid [], struct in_addr *, int);
+
+#endif /* _ZEBRA_SNMP_H */