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+/* asn1.h
+ * Definitions for ASN.1 BER dissection
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ *
+ * Based on "g_asn1.h" from:
+ *
+ * GXSNMP -- An snmp mangament application
+ * Copyright (C) 1998 Gregory McLean & Jochen Friedrich
+ * Beholder RMON ethernet network monitor,Copyright (C) 1993 DNPAP group
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#ifndef __ASN1_H__
+#define __ASN1_H__
+
+#define ASN1_UNI 0 /* Universal */
+#define ASN1_APL 1 /* Application */
+#define ASN1_CTX 2 /* Context */
+#define ASN1_PRV 3 /* Private */
+
+ /* Tag */
+#define ASN1_EOC 0 /* End Of Contents */
+#define ASN1_BOL 1 /* Boolean */
+#define ASN1_INT 2 /* Integer */
+#define ASN1_BTS 3 /* Bit String */
+#define ASN1_OTS 4 /* Octet String */
+#define ASN1_NUL 5 /* Null */
+#define ASN1_OJI 6 /* Object Identifier */
+#define ASN1_OJD 7 /* Object Description */
+#define ASN1_EXT 8 /* External */
+#define ASN1_REAL 9 /* Real */
+#define ASN1_ENUM 10 /* Enumerated */
+#define ASN1_SEQ 16 /* Sequence */
+#define ASN1_SET 17 /* Set */
+#define ASN1_NUMSTR 18 /* Numerical String */
+#define ASN1_PRNSTR 19 /* Printable String */
+#define ASN1_TEXSTR 20 /* Teletext String */
+#define ASN1_VIDSTR 21 /* Video String */
+#define ASN1_IA5STR 22 /* IA5 String */
+#define ASN1_UNITIM 23 /* Universal Time */
+#define ASN1_GENTIM 24 /* General Time */
+#define ASN1_GRASTR 25 /* Graphical String */
+#define ASN1_VISSTR 26 /* Visible String */
+#define ASN1_GENSTR 27 /* General String */
+
+ /* Primitive / Constructed */
+#define ASN1_PRI 0 /* Primitive */
+#define ASN1_CON 1 /* Constructed */
+
+/*
+ * Oh, this is hellish.
+ *
+ * The CMU SNMP library defines an OID as a sequence of "u_int"s,
+ * unless EIGHTBIT_SUBIDS is defined, in which case it defines
+ * an OID as a sequence of "u_char"s. None of its header files
+ * define EIGHTBIT_SUBIDS, and if a program defines it, that's
+ * not going to change the library to treat OIDs as sequences
+ * of "u_chars", so I'll assume that it'll be "u_int"s.
+ *
+ * The UCD SNMP library does the same, except it defines an OID
+ * as a sequence of "u_long"s, by default.
+ *
+ * "libsmi" defines it as a sequence of "unsigned int"s.
+ *
+ * I don't want to oblige all users of ASN.1 to include the SNMP
+ * library header files, so I'll assume none of the SNMP libraries
+ * will rudely surprise me by changing the definition; if they
+ * do, there will be compiler warnings, so we'll at least be able
+ * to catch it.
+ *
+ * This requires that, if you're going to use "asn1_subid_decode()",
+ * "asn1_oid_value_decode()", or "asn1_oid_decode()", you include
+ * "config.h", to get the right #defines defined, so that we properly
+ * typedef "subid_t".
+ */
+#if defined(HAVE_SOME_SNMP)
+typedef gulong subid_t; /* Net-SNMP or UCD SNMP */
+#else
+typedef guint subid_t; /* CMU SNMP, libsmi, or nothing */
+#endif
+
+#define ASN1_ERR_NOERROR 0 /* no error */
+#define ASN1_ERR_EOC_MISMATCH 1
+#define ASN1_ERR_WRONG_TYPE 2 /* type not right */
+#define ASN1_ERR_LENGTH_NOT_DEFINITE 3 /* length should be definite */
+#define ASN1_ERR_LENGTH_MISMATCH 4
+#define ASN1_ERR_WRONG_LENGTH_FOR_TYPE 5 /* length wrong for type */
+
+typedef struct _ASN1_SCK ASN1_SCK;
+
+struct _ASN1_SCK
+{ /* ASN1 socket */
+ tvbuff_t *tvb; /* Tvbuff whence the data comes */
+ int offset; /* Current offset in tvbuff */
+};
+
+extern void asn1_open (ASN1_SCK *asn1, tvbuff_t *tvb, int offset);
+extern void asn1_close (ASN1_SCK *asn1, int *offset);
+extern int asn1_octet_decode (ASN1_SCK *asn1, guchar *ch);
+extern int asn1_tag_decode (ASN1_SCK *asn1, guint *tag);
+extern int asn1_id_decode (ASN1_SCK *asn1, guint *cls, guint *con, guint *tag);
+extern int asn1_id_decode1 (ASN1_SCK *asn1, guint *tag);
+extern int asn1_length_decode (ASN1_SCK *asn1, gboolean *def, guint *len);
+extern int asn1_header_decode(ASN1_SCK *asn1, guint *cls, guint *con,
+ guint *tag, gboolean *defp, guint *lenp);
+extern int asn1_eoc (ASN1_SCK *asn1, int eoc);
+extern int asn1_eoc_decode (ASN1_SCK *asn1, int eoc);
+extern int asn1_null_decode (ASN1_SCK *asn1, int enc_len);
+extern int asn1_bool_decode (ASN1_SCK *asn1, int enc_len, gboolean *boolean);
+extern int asn1_int32_value_decode (ASN1_SCK *asn1, int enc_len,
+ gint32 *integer);
+extern int asn1_int32_decode (ASN1_SCK *asn1, gint32 *integer, guint *nbytes);
+extern int asn1_uint32_value_decode (ASN1_SCK *asn1, int enc_len,
+ guint32 *integer);
+extern int asn1_uint32_decode (ASN1_SCK *asn1, guint32 *integer, guint *nbytes);
+extern int asn1_bits_decode (ASN1_SCK *asn1, int enc_len, guchar **bits,
+ guint *len, guchar *unused);
+extern int asn1_string_value_decode (ASN1_SCK *asn1, int enc_len,
+ guchar **octets);
+extern int asn1_string_decode (ASN1_SCK *asn1, guchar **octets, guint *str_len,
+ guint *nbytes, guint expected_tag);
+extern int asn1_octet_string_decode (ASN1_SCK *asn1, guchar **octets,
+ guint *str_len, guint *nbytes);
+extern int asn1_subid_decode (ASN1_SCK *asn1, subid_t *subid);
+extern int asn1_oid_value_decode (ASN1_SCK *asn1, int enc_len, subid_t **oid,
+ guint *len);
+extern int asn1_oid_decode (ASN1_SCK *asn1, subid_t **oid, guint *len,
+ guint *nbytes);
+extern int asn1_sequence_decode (ASN1_SCK *asn1, guint *seq_len, guint *nbytes);
+
+extern char *asn1_err_to_str (int err);
+
+#endif