1 /*- 2 * Copyright (c) 2005-2006 The FreeBSD Project 3 * All rights reserved. 4 * 5 * Author: Shteryana Shopova <syrinx@FreeBSD.org> 6 * 7 * Redistribution of this software and documentation and use in source and 8 * binary forms, with or without modification, are permitted provided that 9 * the following conditions are met: 10 * 11 * 1. Redistributions of source code or documentation must retain the above 12 * copyright notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * Helper functions common for all tools. 30 */ 31 32 #ifndef _BSNMP_TOOLS_H_ 33 #define _BSNMP_TOOLS_H_ 34 35 /* From asn1.h + 1 byte for trailing zero. */ 36 #define MAX_OCTSTRING_LEN ASN_MAXOCTETSTRING + 1 37 #define MAX_CMD_SYNTAX_LEN 12 38 39 /* Arbitrary upper limit on node names and function names - gensnmptree.c. */ 40 #define MAXSTR 1000 41 42 /* Should be enough to fetch the biggest allowed octet string. */ 43 #define MAX_BUFF_SIZE (ASN_MAXOCTETSTRING + 50) 44 45 #define SNMP_DEFS_DIR "/usr/share/snmp/defs/" 46 #define SNMP_DEFAULT_LOCAL "/var/run/snmpd.sock" 47 48 #define SNMP_MAX_REPETITIONS 10 49 50 enum snmp_access { 51 SNMP_ACCESS_NONE = 0, 52 SNMP_ACCESS_GET, 53 SNMP_ACCESS_SET, 54 SNMP_ACCESS_GETSET, 55 }; 56 57 /* A structure for integer-string enumerations. */ 58 struct enum_pair { 59 int32_t enum_val; 60 char *enum_str; 61 STAILQ_ENTRY(enum_pair) link; 62 }; 63 64 STAILQ_HEAD(enum_pairs, enum_pair); 65 66 struct enum_type { 67 char *name; 68 uint32_t syntax; 69 int32_t is_enum; 70 int32_t is_bits; 71 struct enum_pairs *snmp_enum; 72 SLIST_ENTRY(enum_type) link; 73 }; 74 75 SLIST_HEAD(snmp_enum_tc, enum_type); 76 77 struct index { 78 enum snmp_tc tc; 79 enum snmp_syntax syntax; 80 struct enum_pairs *snmp_enum; 81 STAILQ_ENTRY(index) link; 82 }; 83 84 STAILQ_HEAD(snmp_idxlist, index); 85 86 struct snmp_index_entry { 87 char *string; 88 uint32_t strlen; 89 struct asn_oid var; 90 struct snmp_idxlist index_list; 91 SLIST_ENTRY(snmp_index_entry) link; 92 }; 93 94 /* Information needed for oid to string conversion. */ 95 struct snmp_oid2str { 96 char *string; 97 uint32_t strlen; 98 enum snmp_tc tc; 99 enum snmp_syntax syntax; 100 enum snmp_access access; 101 struct asn_oid var; 102 /* A pointer to a entry from the table list - OK if NULL. */ 103 struct snmp_index_entry *table_idx; 104 /* 105 * A singly-linked tail queue of all (int, string) pairs - 106 * for INTEGER syntax only. 107 */ 108 struct enum_pairs *snmp_enum; 109 SLIST_ENTRY(snmp_oid2str) link; 110 }; 111 112 /* A structure to hold each oid input by user. */ 113 struct snmp_object { 114 /* Flag - if set, the variable caused error in a previous request. */ 115 int32_t error; 116 /* 117 * A pointer in the mapping lists - not used if OIDs are input as 118 * numericals. 119 */ 120 struct snmp_oid2str *info; 121 /* A snmp value to hold the actual oid, syntax and value. */ 122 struct snmp_value val; 123 SLIST_ENTRY(snmp_object) link; 124 }; 125 126 struct fname { 127 char *name; 128 int32_t done; 129 struct asn_oid cut; 130 SLIST_ENTRY(fname) link; 131 }; 132 133 SLIST_HEAD(snmp_mapping, snmp_oid2str); 134 SLIST_HEAD(fname_list, fname); 135 SLIST_HEAD(snmp_table_index, snmp_index_entry); 136 137 /* 138 * Keep a list for every syntax type. 139 */ 140 struct snmp_mappings { 141 /* The list containing all non-leaf nodes. */ 142 struct snmp_mapping nodelist; 143 /* INTEGER/INTEGER32 types. */ 144 struct snmp_mapping intlist; 145 /* OCTETSTRING types. */ 146 struct snmp_mapping octlist; 147 /* OID types. */ 148 struct snmp_mapping oidlist; 149 /* IPADDRESS types. */ 150 struct snmp_mapping iplist; 151 /* TIMETICKS types. */ 152 struct snmp_mapping ticklist; 153 /* COUNTER types. */ 154 struct snmp_mapping cntlist; 155 /* GAUGE types. */ 156 struct snmp_mapping gaugelist; 157 /* COUNTER64 types. */ 158 struct snmp_mapping cnt64list; 159 /* ENUM values for oid types. */ 160 struct snmp_mapping enumlist; 161 /* Description of all table entry types. */ 162 struct snmp_table_index tablelist; 163 /* Defined enumerated textual conventions. */ 164 struct snmp_enum_tc tclist; 165 }; 166 167 struct snmp_toolinfo { 168 uint32_t flags; 169 /* Number of initially input OIDs. */ 170 int32_t objects; 171 /* List of all input OIDs. */ 172 SLIST_HEAD(snmp_objectlist, snmp_object) snmp_objectlist; 173 /* All known OID to string mapping data. */ 174 struct snmp_mappings *mappings; 175 /* A list of .defs filenames to search oid<->string mapping. */ 176 struct fname_list filelist; 177 /* SNMPv3 USM user credentials */ 178 char *passwd; 179 }; 180 181 /* XXX we might want to get away with this and will need to touch 182 * XXX the MACROS then too */ 183 extern struct snmp_toolinfo snmptool; 184 185 /* Definitions for some flags' bits. */ 186 #define OUTPUT_BITS 0x00000003 /* bits 0-1 for output type */ 187 #define NUMERIC_BIT 0x00000004 /* bit 2 for numeric oids */ 188 #define RETRY_BIT 0x00000008 /* bit 3 for retry on error response */ 189 #define ERRIGNORE_BIT 0x00000010 /* bit 4 for skip sanity checking */ 190 #define ERRIGNORE_BIT 0x00000010 /* bit 4 for skip sanity checking */ 191 #define EDISCOVER_BIT 0x00000020 /* bit 5 for SNMP Engine Discovery */ 192 #define LOCALKEY_BIT 0x00000040 /* bit 6 for using localized key */ 193 /* 0x00000080 */ /* bit 7 reserved */ 194 #define PDUTYPE_BITS 0x00000f00 /* bits 8-11 for pdu type */ 195 /* 0x0000f000 */ /* bit 12-15 reserved */ 196 #define MAXREP_BITS 0x00ff0000 /* bits 16-23 for max-repetit. value */ 197 #define NONREP_BITS 0xff000000 /* bits 24-31 for non-repeaters value */ 198 199 #define OUTPUT_SHORT 0x0 200 #define OUTPUT_VERBOSE 0x1 201 #define OUTPUT_TABULAR 0x2 202 #define OUTPUT_QUIET 0x3 203 204 /* Macros for playing with flags' bits. */ 205 #define SET_OUTPUT(ctx, type) ((ctx)->flags |= ((type) & OUTPUT_BITS)) 206 #define GET_OUTPUT(ctx) ((ctx)->flags & OUTPUT_BITS) 207 208 #define SET_NUMERIC(ctx) ((ctx)->flags |= NUMERIC_BIT) 209 #define ISSET_NUMERIC(ctx) ((ctx)->flags & NUMERIC_BIT) 210 211 #define SET_RETRY(ctx) ((ctx)->flags |= RETRY_BIT) 212 #define ISSET_RETRY(ctx) ((ctx)->flags & RETRY_BIT) 213 214 #define SET_ERRIGNORE(ctx) ((ctx)->flags |= ERRIGNORE_BIT) 215 #define ISSET_ERRIGNORE(ctx) ((ctx)->flags & ERRIGNORE_BIT) 216 217 #define SET_EDISCOVER(ctx) ((ctx)->flags |= EDISCOVER_BIT) 218 #define ISSET_EDISCOVER(ctx) ((ctx)->flags & EDISCOVER_BIT) 219 220 #define SET_LOCALKEY(ctx) ((ctx)->flags |= LOCALKEY_BIT) 221 #define ISSET_LOCALKEY(ctx) ((ctx)->flags & LOCALKEY_BIT) 222 223 #define SET_PDUTYPE(ctx, type) (((ctx)->flags |= (((type) & 0xf) << 8))) 224 #define GET_PDUTYPE(ctx) (((ctx)->flags & PDUTYPE_BITS) >> 8) 225 226 #define SET_MAXREP(ctx, i) (((ctx)->flags |= (((i) & 0xff) << 16))) 227 #define GET_MAXREP(ctx) (((ctx)->flags & MAXREP_BITS) >> 16) 228 229 #define SET_NONREP(ctx, i) (((ctx)->flags |= (((i) & 0xff) << 24))) 230 #define GET_NONREP(ctx) (((ctx)->flags & NONREP_BITS) >> 24) 231 232 extern int _bsnmptools_debug; 233 extern const struct asn_oid IsoOrgDod_OID; 234 235 int snmptool_init(struct snmp_toolinfo *); 236 int32_t snmp_import_file(struct snmp_toolinfo *, struct fname *); 237 int32_t snmp_import_all(struct snmp_toolinfo *); 238 int32_t add_filename(struct snmp_toolinfo *, const char *, 239 const struct asn_oid *, int32_t); 240 void free_filelist(struct snmp_toolinfo *); 241 void snmp_tool_freeall(struct snmp_toolinfo *); 242 void snmp_import_dump(int); 243 244 /* bsnmpmap.c */ 245 struct snmp_mappings *snmp_mapping_init(void); 246 int32_t snmp_mapping_free(struct snmp_toolinfo *); 247 void snmp_index_listfree(struct snmp_idxlist *); 248 void snmp_dump_oid2str(struct snmp_oid2str *); 249 int32_t snmp_node_insert(struct snmp_toolinfo *, struct snmp_oid2str *); 250 int32_t snmp_leaf_insert(struct snmp_toolinfo *, struct snmp_oid2str *); 251 int32_t snmp_enum_insert(struct snmp_toolinfo *, struct snmp_oid2str *); 252 struct enum_pairs *enum_pairs_init(void); 253 void enum_pairs_free(struct enum_pairs *); 254 void snmp_mapping_entryfree(struct snmp_oid2str *); 255 int32_t enum_pair_insert(struct enum_pairs *, int32_t, char *); 256 char *enum_string_lookup(struct enum_pairs *, int32_t); 257 int32_t enum_number_lookup(struct enum_pairs *, char *); 258 int32_t snmp_syntax_insert(struct snmp_idxlist *, struct enum_pairs *, 259 enum snmp_syntax, enum snmp_tc); 260 int32_t snmp_table_insert(struct snmp_toolinfo *, struct snmp_index_entry *); 261 262 struct enum_type *snmp_enumtc_init(char *); 263 void snmp_enumtc_free(struct enum_type *); 264 void snmp_enumtc_insert(struct snmp_toolinfo *, struct enum_type *); 265 struct enum_type *snmp_enumtc_lookup(struct snmp_toolinfo *, char *); 266 267 void snmp_mapping_dump(struct snmp_toolinfo *); 268 int32_t snmp_lookup_leafstring(struct snmp_toolinfo *, struct snmp_object *); 269 int32_t snmp_lookup_enumstring(struct snmp_toolinfo *, struct snmp_object *); 270 int32_t snmp_lookup_oidstring(struct snmp_toolinfo *, struct snmp_object *); 271 int32_t snmp_lookup_nonleaf_string(struct snmp_toolinfo *, struct snmp_object *); 272 int32_t snmp_lookup_allstring(struct snmp_toolinfo *, struct snmp_object *); 273 int32_t snmp_lookup_nodestring(struct snmp_toolinfo *, struct snmp_object *); 274 int32_t snmp_lookup_oidall(struct snmp_toolinfo *, struct snmp_object *, char *); 275 int32_t snmp_lookup_enumoid(struct snmp_toolinfo *, struct snmp_object *, char *); 276 int32_t snmp_lookup_oid(struct snmp_toolinfo *, struct snmp_object *, char *); 277 278 /* Functions parsing common options for all tools. */ 279 int32_t parse_server(char *); 280 int32_t parse_timeout(char *); 281 int32_t parse_retry(char *); 282 int32_t parse_version(char *); 283 int32_t parse_local_path(char *); 284 int32_t parse_buflen(char *); 285 int32_t parse_debug(void); 286 int32_t parse_discovery(struct snmp_toolinfo *); 287 int32_t parse_local_key(struct snmp_toolinfo *); 288 int32_t parse_num_oids(struct snmp_toolinfo *); 289 int32_t parse_file(struct snmp_toolinfo *, char *); 290 int32_t parse_include(struct snmp_toolinfo *, char *); 291 int32_t parse_output(struct snmp_toolinfo *, char *); 292 int32_t parse_errors(struct snmp_toolinfo *); 293 int32_t parse_skip_access(struct snmp_toolinfo *); 294 int32_t parse_authentication(struct snmp_toolinfo *, char *); 295 int32_t parse_privacy(struct snmp_toolinfo *, char *); 296 int32_t parse_context(struct snmp_toolinfo *, char *); 297 int32_t parse_user_security(struct snmp_toolinfo *, char *); 298 299 typedef int32_t (*snmp_verify_inoid_f) (struct snmp_toolinfo *, 300 struct snmp_object *, char *); 301 int32_t snmp_object_add(struct snmp_toolinfo *, snmp_verify_inoid_f, char *); 302 int32_t snmp_object_remove(struct snmp_toolinfo *, struct asn_oid *oid); 303 int32_t snmp_object_seterror(struct snmp_toolinfo *, struct snmp_value *, 304 int32_t); 305 306 enum snmp_syntax parse_syntax(char *); 307 char *snmp_parse_suboid(char *, struct asn_oid *); 308 char *snmp_parse_index(struct snmp_toolinfo *, char *, struct snmp_object *); 309 int32_t snmp_parse_numoid(char *, struct asn_oid *); 310 int32_t snmp_suboid_append(struct asn_oid *, asn_subid_t); 311 int32_t snmp_suboid_pop(struct asn_oid *); 312 313 typedef int32_t (*snmp_verify_vbind_f) (struct snmp_toolinfo *, 314 struct snmp_pdu *, struct snmp_object *); 315 typedef int32_t (*snmp_add_vbind_f) (struct snmp_pdu *, struct snmp_object *); 316 int32_t snmp_pdu_add_bindings(struct snmp_toolinfo *, snmp_verify_vbind_f, 317 snmp_add_vbind_f, struct snmp_pdu *, int32_t); 318 319 int32_t snmp_parse_get_resp(struct snmp_pdu *, struct snmp_pdu *); 320 int32_t snmp_parse_getbulk_resp(struct snmp_pdu *, struct snmp_pdu *); 321 int32_t snmp_parse_getnext_resp(struct snmp_pdu *, struct snmp_pdu *); 322 int32_t snmp_parse_resp(struct snmp_pdu *, struct snmp_pdu *); 323 int32_t snmp_output_numval(struct snmp_toolinfo *, struct snmp_value *, 324 struct snmp_oid2str *); 325 void snmp_output_val(struct snmp_value *); 326 int32_t snmp_output_resp(struct snmp_toolinfo *, struct snmp_pdu *, struct asn_oid *); 327 void snmp_output_err_resp(struct snmp_toolinfo *, struct snmp_pdu *); 328 void snmp_output_engine(void); 329 void snmp_output_keys(void); 330 331 #endif /* _BSNMP_TOOLS_H_ */ 332