Dave Shield | 00ef569 | 2011-02-22 08:55:48 +0000 | [diff] [blame] | 1 | /* |
| 2 | * snmpv3.c |
| 3 | */ |
| 4 | |
| 5 | #include <net-snmp/net-snmp-config.h> |
| 6 | #include <errno.h> |
| 7 | #ifdef HAVE_LIMITS_H |
| 8 | #include <limits.h> |
| 9 | #endif |
| 10 | #include <stdio.h> |
| 11 | #include <sys/types.h> |
| 12 | |
| 13 | #if TIME_WITH_SYS_TIME |
| 14 | # ifdef WIN32 |
| 15 | # include <sys/timeb.h> |
| 16 | # else |
| 17 | # include <sys/time.h> |
| 18 | # endif |
| 19 | # include <time.h> |
| 20 | #else |
| 21 | # if HAVE_SYS_TIME_H |
| 22 | # include <sys/time.h> |
| 23 | # else |
| 24 | # include <time.h> |
| 25 | # endif |
| 26 | #endif |
| 27 | #if HAVE_SYS_TIMES_H |
| 28 | #include <sys/times.h> |
| 29 | #endif |
| 30 | #if HAVE_STRING_H |
| 31 | #include <string.h> |
| 32 | #else |
| 33 | #include <strings.h> |
| 34 | #endif |
| 35 | #include <ctype.h> |
| 36 | #if HAVE_NETINET_IN_H |
| 37 | #include <netinet/in.h> |
| 38 | #endif |
| 39 | #if HAVE_UNISTD_H |
| 40 | #include <unistd.h> |
| 41 | #endif |
| 42 | #if HAVE_WINSOCK_H |
| 43 | #include <winsock.h> |
| 44 | #endif |
| 45 | #if HAVE_SYS_SOCKET_H |
| 46 | #include <sys/socket.h> |
| 47 | #endif |
| 48 | #if HAVE_NETDB_H |
| 49 | #include <netdb.h> |
| 50 | #endif |
| 51 | #if HAVE_STDLIB_H |
| 52 | # include <stdlib.h> |
| 53 | #endif |
| 54 | |
| 55 | /* |
| 56 | * Stuff needed for getHwAddress(...) |
| 57 | */ |
| 58 | #ifdef HAVE_SYS_IOCTL_H |
| 59 | # include <sys/ioctl.h> |
| 60 | #endif |
| 61 | #ifdef HAVE_NET_IF_H |
| 62 | # include <net/if.h> |
| 63 | #endif |
| 64 | |
| 65 | #if HAVE_DMALLOC_H |
| 66 | #include <dmalloc.h> |
| 67 | #endif |
| 68 | |
| 69 | #include <net-snmp/types.h> |
| 70 | #include <net-snmp/output_api.h> |
| 71 | #include <net-snmp/config_api.h> |
| 72 | #include <net-snmp/utilities.h> |
| 73 | |
| 74 | #include <net-snmp/library/snmpv3.h> |
| 75 | #include <net-snmp/library/callback.h> |
| 76 | #include <net-snmp/library/snmp_api.h> |
| 77 | #include <net-snmp/library/lcd_time.h> |
| 78 | #include <net-snmp/library/scapi.h> |
| 79 | #include <net-snmp/library/keytools.h> |
| 80 | #include <net-snmp/library/lcd_time.h> |
| 81 | #include <net-snmp/library/snmp_secmod.h> |
| 82 | #include <net-snmp/library/snmpusm.h> |
| 83 | #include <net-snmp/library/transform_oids.h> |
| 84 | |
| 85 | static u_long engineBoots = 1; |
| 86 | static unsigned int engineIDType = ENGINEID_TYPE_NETSNMP_RND; |
| 87 | static unsigned char *engineID = NULL; |
| 88 | static size_t engineIDLength = 0; |
| 89 | static unsigned char *engineIDNic = NULL; |
| 90 | static unsigned int engineIDIsSet = 0; /* flag if ID set by config */ |
| 91 | static unsigned char *oldEngineID = NULL; |
| 92 | static size_t oldEngineIDLength = 0; |
| 93 | static struct timeval snmpv3starttime; |
| 94 | |
| 95 | /* |
| 96 | * Set up default snmpv3 parameter value storage. |
| 97 | */ |
| 98 | static const oid *defaultAuthType = NULL; |
| 99 | static size_t defaultAuthTypeLen = 0; |
| 100 | static const oid *defaultPrivType = NULL; |
| 101 | static size_t defaultPrivTypeLen = 0; |
| 102 | |
| 103 | /* this is probably an over-kill ifdef, but why not */ |
| 104 | #if defined(HAVE_SYS_TIMES_H) && defined(HAVE_UNISTD_H) && defined(HAVE_TIMES) && defined(_SC_CLK_TCK) && defined(HAVE_SYSCONF) && defined(UINT_MAX) |
| 105 | |
| 106 | #define SNMP_USE_TIMES 1 |
| 107 | |
| 108 | static clock_t snmpv3startClock; |
| 109 | static long clockticks = 0; |
| 110 | static unsigned int lastcalltime = 0; |
| 111 | static unsigned int wrapcounter = 0; |
| 112 | |
| 113 | #endif /* times() tests */ |
| 114 | |
| 115 | #if defined(IFHWADDRLEN) && defined(SIOCGIFHWADDR) |
| 116 | static int getHwAddress(const char *networkDevice, char *addressOut); |
| 117 | #endif |
| 118 | |
| 119 | void |
| 120 | snmpv3_authtype_conf(const char *word, char *cptr) |
| 121 | { |
| 122 | #ifndef NETSNMP_DISABLE_MD5 |
| 123 | if (strcasecmp(cptr, "MD5") == 0) |
| 124 | defaultAuthType = usmHMACMD5AuthProtocol; |
| 125 | else |
| 126 | #endif |
| 127 | if (strcasecmp(cptr, "SHA") == 0) |
| 128 | defaultAuthType = usmHMACSHA1AuthProtocol; |
| 129 | else |
| 130 | config_perror("Unknown authentication type"); |
| 131 | defaultAuthTypeLen = USM_LENGTH_OID_TRANSFORM; |
| 132 | DEBUGMSGTL(("snmpv3", "set default authentication type: %s\n", cptr)); |
| 133 | } |
| 134 | |
| 135 | const oid * |
| 136 | get_default_authtype(size_t * len) |
| 137 | { |
| 138 | if (defaultAuthType == NULL) { |
| 139 | defaultAuthType = SNMP_DEFAULT_AUTH_PROTO; |
| 140 | defaultAuthTypeLen = SNMP_DEFAULT_AUTH_PROTOLEN; |
| 141 | } |
| 142 | if (len) |
| 143 | *len = defaultAuthTypeLen; |
| 144 | return defaultAuthType; |
| 145 | } |
| 146 | |
| 147 | void |
| 148 | snmpv3_privtype_conf(const char *word, char *cptr) |
| 149 | { |
| 150 | int testcase = 0; |
| 151 | |
| 152 | #ifndef NETSNMP_DISABLE_DES |
| 153 | if (strcasecmp(cptr, "DES") == 0) { |
| 154 | testcase = 1; |
| 155 | defaultPrivType = usmDESPrivProtocol; |
| 156 | } |
| 157 | #endif |
| 158 | |
| 159 | #if HAVE_AES |
| 160 | /* XXX AES: assumes oid length == des oid length */ |
| 161 | if (strcasecmp(cptr, "AES128") == 0 || |
| 162 | strcasecmp(cptr, "AES") == 0) { |
| 163 | testcase = 1; |
| 164 | defaultPrivType = usmAES128PrivProtocol; |
| 165 | } |
| 166 | #endif |
| 167 | if (testcase == 0) |
| 168 | config_perror("Unknown privacy type"); |
| 169 | defaultPrivTypeLen = SNMP_DEFAULT_PRIV_PROTOLEN; |
| 170 | DEBUGMSGTL(("snmpv3", "set default privacy type: %s\n", cptr)); |
| 171 | } |
| 172 | |
| 173 | const oid * |
| 174 | get_default_privtype(size_t * len) |
| 175 | { |
| 176 | if (defaultPrivType == NULL) { |
| 177 | #ifndef NETSNMP_DISABLE_DES |
| 178 | defaultPrivType = usmDESPrivProtocol; |
| 179 | #else |
| 180 | defaultPrivType = usmAESPrivProtocol; |
| 181 | #endif |
| 182 | defaultPrivTypeLen = USM_LENGTH_OID_TRANSFORM; |
| 183 | } |
| 184 | if (len) |
| 185 | *len = defaultPrivTypeLen; |
| 186 | return defaultPrivType; |
| 187 | } |
| 188 | |
| 189 | /*******************************************************************-o-****** |
| 190 | * snmpv3_secLevel_conf |
| 191 | * |
| 192 | * Parameters: |
| 193 | * *word |
| 194 | * *cptr |
| 195 | * |
| 196 | * Line syntax: |
| 197 | * defSecurityLevel "noAuthNoPriv" | "authNoPriv" | "authPriv" |
| 198 | */ |
| 199 | |
| 200 | int |
| 201 | parse_secLevel_conf(const char *word, char *cptr) { |
| 202 | if (strcasecmp(cptr, "noAuthNoPriv") == 0 || strcmp(cptr, "1") == 0 || |
| 203 | strcasecmp(cptr, "nanp") == 0) { |
| 204 | return SNMP_SEC_LEVEL_NOAUTH; |
| 205 | } else if (strcasecmp(cptr, "authNoPriv") == 0 || strcmp(cptr, "2") == 0 || |
| 206 | strcasecmp(cptr, "anp") == 0) { |
| 207 | return SNMP_SEC_LEVEL_AUTHNOPRIV; |
| 208 | } else if (strcasecmp(cptr, "authPriv") == 0 || strcmp(cptr, "3") == 0 || |
| 209 | strcasecmp(cptr, "ap") == 0) { |
| 210 | return SNMP_SEC_LEVEL_AUTHPRIV; |
| 211 | } else { |
| 212 | return -1; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | void |
| 217 | snmpv3_secLevel_conf(const char *word, char *cptr) |
| 218 | { |
| 219 | int secLevel; |
| 220 | |
| 221 | if ((secLevel = parse_secLevel_conf( word, cptr )) >= 0 ) { |
| 222 | netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, |
| 223 | NETSNMP_DS_LIB_SECLEVEL, secLevel); |
| 224 | } else { |
| 225 | netsnmp_config_error("Unknown security level: %s", cptr); |
| 226 | } |
| 227 | DEBUGMSGTL(("snmpv3", "default secLevel set to: %s = %d\n", cptr, |
| 228 | netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID, |
| 229 | NETSNMP_DS_LIB_SECLEVEL))); |
| 230 | } |
| 231 | |
| 232 | |
| 233 | int |
| 234 | snmpv3_options(char *optarg, netsnmp_session * session, char **Apsz, |
| 235 | char **Xpsz, int argc, char *const *argv) |
| 236 | { |
| 237 | char *cp = optarg; |
| 238 | int testcase; |
| 239 | optarg++; |
| 240 | /* |
| 241 | * Support '... -3x=value ....' syntax |
| 242 | */ |
| 243 | if (*optarg == '=') { |
| 244 | optarg++; |
| 245 | } |
| 246 | /* |
| 247 | * and '.... "-3x value" ....' (*with* the quotes) |
| 248 | */ |
| 249 | while (*optarg && isspace(*optarg)) { |
| 250 | optarg++; |
| 251 | } |
| 252 | /* |
| 253 | * Finally, handle ".... -3x value ...." syntax |
| 254 | * (*without* surrounding quotes) |
| 255 | */ |
| 256 | if (!*optarg) { |
| 257 | /* |
| 258 | * We've run off the end of the argument |
| 259 | * so move on the the next. |
| 260 | */ |
| 261 | optarg = argv[optind++]; |
| 262 | if (optind > argc) { |
| 263 | fprintf(stderr, |
| 264 | "Missing argument after SNMPv3 '-3%c' option.\n", *cp); |
| 265 | return (-1); |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | switch (*cp) { |
| 270 | |
| 271 | case 'Z': |
| 272 | errno=0; |
| 273 | session->engineBoots = strtoul(optarg, &cp, 10); |
| 274 | if (errno || cp == optarg) { |
| 275 | fprintf(stderr, "Need engine boots value after -3Z flag.\n"); |
| 276 | return (-1); |
| 277 | } |
| 278 | if (*cp == ',') { |
| 279 | char *endptr; |
| 280 | cp++; |
| 281 | session->engineTime = strtoul(cp, &endptr, 10); |
| 282 | if (errno || cp == endptr) { |
| 283 | fprintf(stderr, "Need engine time after \"-3Z engineBoot,\".\n"); |
| 284 | return (-1); |
| 285 | } |
| 286 | } else { |
| 287 | fprintf(stderr, "Need engine time after \"-3Z engineBoot,\".\n"); |
| 288 | return (-1); |
| 289 | } |
| 290 | break; |
| 291 | |
| 292 | case 'e':{ |
| 293 | size_t ebuf_len = 32, eout_len = 0; |
| 294 | u_char *ebuf = (u_char *) malloc(ebuf_len); |
| 295 | |
| 296 | if (ebuf == NULL) { |
| 297 | fprintf(stderr, "malloc failure processing -3e flag.\n"); |
| 298 | return (-1); |
| 299 | } |
| 300 | if (!snmp_hex_to_binary |
| 301 | (&ebuf, &ebuf_len, &eout_len, 1, optarg)) { |
| 302 | fprintf(stderr, "Bad engine ID value after -3e flag.\n"); |
| 303 | SNMP_FREE(ebuf); |
| 304 | return (-1); |
| 305 | } |
| 306 | session->securityEngineID = ebuf; |
| 307 | session->securityEngineIDLen = eout_len; |
| 308 | break; |
| 309 | } |
| 310 | |
| 311 | case 'E':{ |
| 312 | size_t ebuf_len = 32, eout_len = 0; |
| 313 | u_char *ebuf = (u_char *) malloc(ebuf_len); |
| 314 | |
| 315 | if (ebuf == NULL) { |
| 316 | fprintf(stderr, "malloc failure processing -3E flag.\n"); |
| 317 | return (-1); |
| 318 | } |
| 319 | if (!snmp_hex_to_binary |
| 320 | (&ebuf, &ebuf_len, &eout_len, 1, optarg)) { |
| 321 | fprintf(stderr, "Bad engine ID value after -3E flag.\n"); |
| 322 | SNMP_FREE(ebuf); |
| 323 | return (-1); |
| 324 | } |
| 325 | session->contextEngineID = ebuf; |
| 326 | session->contextEngineIDLen = eout_len; |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | case 'n': |
| 331 | session->contextName = optarg; |
| 332 | session->contextNameLen = strlen(optarg); |
| 333 | break; |
| 334 | |
| 335 | case 'u': |
| 336 | session->securityName = optarg; |
| 337 | session->securityNameLen = strlen(optarg); |
| 338 | break; |
| 339 | |
| 340 | case 'l': |
| 341 | if (!strcasecmp(optarg, "noAuthNoPriv") || !strcmp(optarg, "1") || |
| 342 | !strcasecmp(optarg, "nanp")) { |
| 343 | session->securityLevel = SNMP_SEC_LEVEL_NOAUTH; |
| 344 | } else if (!strcasecmp(optarg, "authNoPriv") |
| 345 | || !strcmp(optarg, "2") || !strcasecmp(optarg, "anp")) { |
| 346 | session->securityLevel = SNMP_SEC_LEVEL_AUTHNOPRIV; |
| 347 | } else if (!strcasecmp(optarg, "authPriv") || !strcmp(optarg, "3") |
| 348 | || !strcasecmp(optarg, "ap")) { |
| 349 | session->securityLevel = SNMP_SEC_LEVEL_AUTHPRIV; |
| 350 | } else { |
| 351 | fprintf(stderr, |
| 352 | "Invalid security level specified after -3l flag: %s\n", |
| 353 | optarg); |
| 354 | return (-1); |
| 355 | } |
| 356 | |
| 357 | break; |
| 358 | |
| 359 | case 'a': |
| 360 | #ifndef NETSNMP_DISABLE_MD5 |
| 361 | if (!strcasecmp(optarg, "MD5")) { |
| 362 | session->securityAuthProto = usmHMACMD5AuthProtocol; |
| 363 | session->securityAuthProtoLen = USM_AUTH_PROTO_MD5_LEN; |
| 364 | } else |
| 365 | #endif |
| 366 | if (!strcasecmp(optarg, "SHA")) { |
| 367 | session->securityAuthProto = usmHMACSHA1AuthProtocol; |
| 368 | session->securityAuthProtoLen = USM_AUTH_PROTO_SHA_LEN; |
| 369 | } else { |
| 370 | fprintf(stderr, |
| 371 | "Invalid authentication protocol specified after -3a flag: %s\n", |
| 372 | optarg); |
| 373 | return (-1); |
| 374 | } |
| 375 | break; |
| 376 | |
| 377 | case 'x': |
| 378 | testcase = 0; |
| 379 | #ifndef NETSNMP_DISABLE_DES |
| 380 | if (!strcasecmp(optarg, "DES")) { |
| 381 | session->securityPrivProto = usmDESPrivProtocol; |
| 382 | session->securityPrivProtoLen = USM_PRIV_PROTO_DES_LEN; |
| 383 | testcase = 1; |
| 384 | } |
| 385 | #endif |
| 386 | #ifdef HAVE_AES |
| 387 | if (!strcasecmp(optarg, "AES128") || |
| 388 | strcasecmp(optarg, "AES")) { |
| 389 | session->securityPrivProto = usmAES128PrivProtocol; |
| 390 | session->securityPrivProtoLen = USM_PRIV_PROTO_AES128_LEN; |
| 391 | testcase = 1; |
| 392 | } |
| 393 | #endif |
| 394 | if (testcase == 0) { |
| 395 | fprintf(stderr, |
| 396 | "Invalid privacy protocol specified after -3x flag: %s\n", |
| 397 | optarg); |
| 398 | return (-1); |
| 399 | } |
| 400 | break; |
| 401 | |
| 402 | case 'A': |
| 403 | *Apsz = optarg; |
| 404 | break; |
| 405 | |
| 406 | case 'X': |
| 407 | *Xpsz = optarg; |
| 408 | break; |
| 409 | |
| 410 | case 'm': { |
| 411 | size_t bufSize = sizeof(session->securityAuthKey); |
| 412 | u_char *tmpp = session->securityAuthKey; |
| 413 | if (!snmp_hex_to_binary(&tmpp, &bufSize, |
| 414 | &session->securityAuthKeyLen, 0, optarg)) { |
| 415 | fprintf(stderr, "Bad key value after -3m flag.\n"); |
| 416 | return (-1); |
| 417 | } |
| 418 | break; |
| 419 | } |
| 420 | |
| 421 | case 'M': { |
| 422 | size_t bufSize = sizeof(session->securityPrivKey); |
| 423 | u_char *tmpp = session->securityPrivKey; |
| 424 | if (!snmp_hex_to_binary(&tmpp, &bufSize, |
| 425 | &session->securityPrivKeyLen, 0, optarg)) { |
| 426 | fprintf(stderr, "Bad key value after -3M flag.\n"); |
| 427 | return (-1); |
| 428 | } |
| 429 | break; |
| 430 | } |
| 431 | |
| 432 | case 'k': { |
| 433 | size_t kbuf_len = 32, kout_len = 0; |
| 434 | u_char *kbuf = (u_char *) malloc(kbuf_len); |
| 435 | |
| 436 | if (kbuf == NULL) { |
| 437 | fprintf(stderr, "malloc failure processing -3k flag.\n"); |
| 438 | return (-1); |
| 439 | } |
| 440 | if (!snmp_hex_to_binary |
| 441 | (&kbuf, &kbuf_len, &kout_len, 1, optarg)) { |
| 442 | fprintf(stderr, "Bad key value after -3k flag.\n"); |
| 443 | SNMP_FREE(kbuf); |
| 444 | return (-1); |
| 445 | } |
| 446 | session->securityAuthLocalKey = kbuf; |
| 447 | session->securityAuthLocalKeyLen = kout_len; |
| 448 | break; |
| 449 | } |
| 450 | |
| 451 | case 'K': { |
| 452 | size_t kbuf_len = 32, kout_len = 0; |
| 453 | u_char *kbuf = (u_char *) malloc(kbuf_len); |
| 454 | |
| 455 | if (kbuf == NULL) { |
| 456 | fprintf(stderr, "malloc failure processing -3K flag.\n"); |
| 457 | return (-1); |
| 458 | } |
| 459 | if (!snmp_hex_to_binary |
| 460 | (&kbuf, &kbuf_len, &kout_len, 1, optarg)) { |
| 461 | fprintf(stderr, "Bad key value after -3K flag.\n"); |
| 462 | SNMP_FREE(kbuf); |
| 463 | return (-1); |
| 464 | } |
| 465 | session->securityPrivLocalKey = kbuf; |
| 466 | session->securityPrivLocalKeyLen = kout_len; |
| 467 | break; |
| 468 | } |
| 469 | |
| 470 | default: |
| 471 | fprintf(stderr, "Unknown SNMPv3 option passed to -3: %c.\n", *cp); |
| 472 | return -1; |
| 473 | } |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | /*******************************************************************-o-****** |
| 478 | * setup_engineID |
| 479 | * |
| 480 | * Parameters: |
| 481 | * **eidp |
| 482 | * *text Printable (?) text to be plugged into the snmpEngineID. |
| 483 | * |
| 484 | * Return: |
| 485 | * Length of allocated engineID string in bytes, -OR- |
| 486 | * -1 on error. |
| 487 | * |
| 488 | * |
| 489 | * Create an snmpEngineID using text and the local IP address. If eidp |
| 490 | * is defined, use it to return a pointer to the newly allocated data. |
| 491 | * Otherwise, use the result to define engineID defined in this module. |
| 492 | * |
| 493 | * Line syntax: |
| 494 | * engineID <text> | NULL |
| 495 | * |
| 496 | * XXX What if a node has multiple interfaces? |
| 497 | * XXX What if multiple engines all choose the same address? |
| 498 | * (answer: You're screwed, because you might need a kul database |
| 499 | * which is dependant on the current engineID. Enumeration and other |
| 500 | * tricks won't work). |
| 501 | */ |
| 502 | int |
| 503 | setup_engineID(u_char ** eidp, const char *text) |
| 504 | { |
| 505 | int enterpriseid = htonl(NETSNMP_ENTERPRISE_OID), |
| 506 | netsnmpoid = htonl(NETSNMP_OID), |
| 507 | localsetup = (eidp) ? 0 : 1; |
| 508 | |
| 509 | /* |
| 510 | * Use local engineID if *eidp == NULL. |
| 511 | */ |
| 512 | #ifdef HAVE_GETHOSTNAME |
| 513 | u_char buf[SNMP_MAXBUF_SMALL]; |
| 514 | struct hostent *hent = NULL; |
| 515 | #endif |
| 516 | u_char *bufp = NULL; |
| 517 | size_t len; |
| 518 | int localEngineIDType = engineIDType; |
| 519 | int tmpint; |
| 520 | time_t tmptime; |
| 521 | |
| 522 | engineIDIsSet = 1; |
| 523 | |
| 524 | #ifdef HAVE_GETHOSTNAME |
| 525 | #ifdef AF_INET6 |
| 526 | /* |
| 527 | * see if they selected IPV4 or IPV6 support |
| 528 | */ |
| 529 | if ((ENGINEID_TYPE_IPV6 == localEngineIDType) || |
| 530 | (ENGINEID_TYPE_IPV4 == localEngineIDType)) { |
| 531 | /* |
| 532 | * get the host name and save the information |
| 533 | */ |
| 534 | gethostname((char *) buf, sizeof(buf)); |
| 535 | hent = gethostbyname((char *) buf); |
| 536 | if (hent && hent->h_addrtype == AF_INET6) { |
| 537 | localEngineIDType = ENGINEID_TYPE_IPV6; |
| 538 | } else { |
| 539 | /* |
| 540 | * Not IPV6 so we go with default |
| 541 | */ |
| 542 | localEngineIDType = ENGINEID_TYPE_IPV4; |
| 543 | } |
| 544 | } |
| 545 | #else |
| 546 | /* |
| 547 | * No IPV6 support. Check if they selected IPV6 engineID type. |
| 548 | * If so make it IPV4 instead |
| 549 | */ |
| 550 | if (ENGINEID_TYPE_IPV6 == localEngineIDType) { |
| 551 | localEngineIDType = ENGINEID_TYPE_IPV4; |
| 552 | } |
| 553 | if (ENGINEID_TYPE_IPV4 == localEngineIDType) { |
| 554 | /* |
| 555 | * get the host name and save the information |
| 556 | */ |
| 557 | gethostname((char *) buf, sizeof(buf)); |
| 558 | hent = gethostbyname((char *) buf); |
| 559 | } |
| 560 | #endif |
| 561 | #endif /* HAVE_GETHOSTNAME */ |
| 562 | |
| 563 | /* |
| 564 | * Determine if we have text and if so setup our localEngineIDType |
| 565 | * * appropriately. |
| 566 | */ |
| 567 | if (NULL != text) { |
| 568 | engineIDType = localEngineIDType = ENGINEID_TYPE_TEXT; |
| 569 | } |
| 570 | /* |
| 571 | * Determine length of the engineID string. |
| 572 | */ |
| 573 | len = 5; /* always have 5 leading bytes */ |
| 574 | switch (localEngineIDType) { |
| 575 | case ENGINEID_TYPE_TEXT: |
| 576 | if (NULL == text) { |
| 577 | snmp_log(LOG_ERR, |
| 578 | "Can't set up engineID of type text from an empty string.\n"); |
| 579 | return -1; |
| 580 | } |
| 581 | len += strlen(text); /* 5 leading bytes+text. No NULL char */ |
| 582 | break; |
| 583 | #if defined(IFHWADDRLEN) && defined(SIOCGIFHWADDR) |
| 584 | case ENGINEID_TYPE_MACADDR: /* MAC address */ |
| 585 | len += 6; /* + 6 bytes for MAC address */ |
| 586 | break; |
| 587 | #endif |
| 588 | case ENGINEID_TYPE_IPV4: /* IPv4 */ |
| 589 | len += 4; /* + 4 byte IPV4 address */ |
| 590 | break; |
| 591 | case ENGINEID_TYPE_IPV6: /* IPv6 */ |
| 592 | len += 16; /* + 16 byte IPV6 address */ |
| 593 | break; |
| 594 | case ENGINEID_TYPE_NETSNMP_RND: /* Net-SNMP specific encoding */ |
| 595 | if (engineID) /* already setup, keep current value */ |
| 596 | return engineIDLength; |
| 597 | if (oldEngineID) { |
| 598 | len = oldEngineIDLength; |
| 599 | } else { |
| 600 | len += sizeof(int) + sizeof(time_t); |
| 601 | } |
| 602 | break; |
| 603 | default: |
| 604 | snmp_log(LOG_ERR, |
| 605 | "Unknown EngineID type requested for setup (%d). Using IPv4.\n", |
| 606 | localEngineIDType); |
| 607 | localEngineIDType = ENGINEID_TYPE_IPV4; /* make into IPV4 */ |
| 608 | len += 4; /* + 4 byte IPv4 address */ |
| 609 | break; |
| 610 | } /* switch */ |
| 611 | |
| 612 | |
| 613 | /* |
| 614 | * Allocate memory and store enterprise ID. |
| 615 | */ |
| 616 | if ((bufp = (u_char *) malloc(len)) == NULL) { |
| 617 | snmp_log_perror("setup_engineID malloc"); |
| 618 | return -1; |
| 619 | } |
| 620 | if (localEngineIDType == ENGINEID_TYPE_NETSNMP_RND) |
| 621 | /* |
| 622 | * we must use the net-snmp enterprise id here, regardless |
| 623 | */ |
| 624 | memcpy(bufp, &netsnmpoid, sizeof(netsnmpoid)); /* XXX Must be 4 bytes! */ |
| 625 | else |
| 626 | memcpy(bufp, &enterpriseid, sizeof(enterpriseid)); /* XXX Must be 4 bytes! */ |
| 627 | |
| 628 | bufp[0] |= 0x80; |
| 629 | |
| 630 | |
| 631 | /* |
| 632 | * Store the given text -OR- the first found IP address |
| 633 | * -OR- the MAC address -OR- random elements |
| 634 | * (the latter being the recommended default) |
| 635 | */ |
| 636 | switch (localEngineIDType) { |
| 637 | case ENGINEID_TYPE_NETSNMP_RND: |
| 638 | if (oldEngineID) { |
| 639 | /* |
| 640 | * keep our previous notion of the engineID |
| 641 | */ |
| 642 | memcpy(bufp, oldEngineID, oldEngineIDLength); |
| 643 | } else { |
| 644 | /* |
| 645 | * Here we've desigend our own ENGINEID that is not based on |
| 646 | * an address which may change and may even become conflicting |
| 647 | * in the future like most of the default v3 engineID types |
| 648 | * suffer from. |
| 649 | * |
| 650 | * Ours is built from 2 fairly random elements: a random number and |
| 651 | * the current time in seconds. This method suffers from boxes |
| 652 | * that may not have a correct clock setting and random number |
| 653 | * seed at startup, but few OSes should have that problem. |
| 654 | */ |
| 655 | bufp[4] = ENGINEID_TYPE_NETSNMP_RND; |
| 656 | tmpint = random(); |
| 657 | memcpy(bufp + 5, &tmpint, sizeof(tmpint)); |
| 658 | tmptime = time(NULL); |
| 659 | memcpy(bufp + 5 + sizeof(tmpint), &tmptime, sizeof(tmptime)); |
| 660 | } |
| 661 | break; |
| 662 | case ENGINEID_TYPE_TEXT: |
| 663 | bufp[4] = ENGINEID_TYPE_TEXT; |
| 664 | memcpy((char *) bufp + 5, (text), strlen(text)); |
| 665 | break; |
| 666 | #ifdef HAVE_GETHOSTNAME |
| 667 | #ifdef AF_INET6 |
| 668 | case ENGINEID_TYPE_IPV6: |
| 669 | bufp[4] = ENGINEID_TYPE_IPV6; |
| 670 | memcpy(bufp + 5, hent->h_addr_list[0], hent->h_length); |
| 671 | break; |
| 672 | #endif |
| 673 | #endif |
| 674 | #if defined(IFHWADDRLEN) && defined(SIOCGIFHWADDR) |
| 675 | case ENGINEID_TYPE_MACADDR: |
| 676 | { |
| 677 | int x; |
| 678 | bufp[4] = ENGINEID_TYPE_MACADDR; |
| 679 | /* |
| 680 | * use default NIC if none provided |
| 681 | */ |
| 682 | if (NULL == engineIDNic) { |
| 683 | x = getHwAddress(DEFAULT_NIC, (char *)&bufp[5]); |
| 684 | } else { |
| 685 | x = getHwAddress((char *)engineIDNic, (char *)&bufp[5]); |
| 686 | } |
| 687 | if (0 != x) |
| 688 | /* |
| 689 | * function failed fill MAC address with zeros |
| 690 | */ |
| 691 | { |
| 692 | memset(&bufp[5], 0, 6); |
| 693 | } |
| 694 | } |
| 695 | break; |
| 696 | #endif |
| 697 | case ENGINEID_TYPE_IPV4: |
| 698 | default: |
| 699 | bufp[4] = ENGINEID_TYPE_IPV4; |
| 700 | #ifdef HAVE_GETHOSTNAME |
| 701 | if (hent && hent->h_addrtype == AF_INET) { |
| 702 | memcpy(bufp + 5, hent->h_addr_list[0], hent->h_length); |
| 703 | } else { /* Unknown address type. Default to 127.0.0.1. */ |
| 704 | |
| 705 | bufp[5] = 127; |
| 706 | bufp[6] = 0; |
| 707 | bufp[7] = 0; |
| 708 | bufp[8] = 1; |
| 709 | } |
| 710 | #else /* HAVE_GETHOSTNAME */ |
| 711 | /* |
| 712 | * Unknown address type. Default to 127.0.0.1. |
| 713 | */ |
| 714 | bufp[5] = 127; |
| 715 | bufp[6] = 0; |
| 716 | bufp[7] = 0; |
| 717 | bufp[8] = 1; |
| 718 | #endif /* HAVE_GETHOSTNAME */ |
| 719 | break; |
| 720 | } |
| 721 | |
| 722 | /* |
| 723 | * Pass the string back to the calling environment, or use it for |
| 724 | * our local engineID. |
| 725 | */ |
| 726 | if (localsetup) { |
| 727 | SNMP_FREE(engineID); |
| 728 | engineID = bufp; |
| 729 | engineIDLength = len; |
| 730 | |
| 731 | } else { |
| 732 | *eidp = bufp; |
| 733 | } |
| 734 | |
| 735 | |
| 736 | return len; |
| 737 | |
| 738 | } /* end setup_engineID() */ |
| 739 | |
| 740 | int |
| 741 | free_engineID(int majorid, int minorid, void *serverarg, |
| 742 | void *clientarg) |
| 743 | { |
| 744 | SNMP_FREE(engineID); |
| 745 | SNMP_FREE(engineIDNic); |
| 746 | SNMP_FREE(oldEngineID); |
| 747 | engineIDIsSet = 0; |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | int |
| 752 | free_enginetime_on_shutdown(int majorid, int minorid, void *serverarg, |
| 753 | void *clientarg) |
| 754 | { |
| 755 | DEBUGMSGTL(("snmpv3", "free enginetime callback called\n")); |
| 756 | if (engineID != NULL) |
| 757 | free_enginetime(engineID, engineIDLength); |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | void |
| 762 | usm_parse_create_usmUser(const char *token, char *line) |
| 763 | { |
| 764 | char *cp; |
| 765 | char buf[SNMP_MAXBUF_MEDIUM]; |
| 766 | struct usmUser *newuser; |
| 767 | u_char userKey[SNMP_MAXBUF_SMALL], *tmpp; |
| 768 | size_t userKeyLen = SNMP_MAXBUF_SMALL; |
| 769 | size_t privKeyLen = 0; |
| 770 | size_t ret; |
| 771 | int ret2; |
| 772 | int testcase; |
| 773 | |
| 774 | newuser = usm_create_user(); |
| 775 | |
| 776 | /* |
| 777 | * READ: Security Name |
| 778 | */ |
| 779 | cp = copy_nword(line, buf, sizeof(buf)); |
| 780 | |
| 781 | /* |
| 782 | * might be a -e ENGINEID argument |
| 783 | */ |
| 784 | if (strcmp(buf, "-e") == 0) { |
| 785 | size_t ebuf_len = 32, eout_len = 0; |
| 786 | u_char *ebuf = (u_char *) malloc(ebuf_len); |
| 787 | |
| 788 | if (ebuf == NULL) { |
| 789 | config_perror("malloc failure processing -e flag"); |
| 790 | usm_free_user(newuser); |
| 791 | return; |
| 792 | } |
| 793 | |
| 794 | /* |
| 795 | * Get the specified engineid from the line. |
| 796 | */ |
| 797 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 798 | if (!snmp_hex_to_binary(&ebuf, &ebuf_len, &eout_len, 1, buf)) { |
| 799 | config_perror("invalid EngineID argument to -e"); |
| 800 | usm_free_user(newuser); |
| 801 | SNMP_FREE(ebuf); |
| 802 | return; |
| 803 | } |
| 804 | |
| 805 | newuser->engineID = ebuf; |
| 806 | newuser->engineIDLen = eout_len; |
| 807 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 808 | } else { |
| 809 | newuser->engineID = snmpv3_generate_engineID(&ret); |
| 810 | if (ret == 0) { |
| 811 | usm_free_user(newuser); |
| 812 | return; |
| 813 | } |
| 814 | newuser->engineIDLen = ret; |
| 815 | } |
| 816 | |
| 817 | newuser->secName = strdup(buf); |
| 818 | newuser->name = strdup(buf); |
| 819 | |
| 820 | if (!cp) |
| 821 | goto add; /* no authentication or privacy type */ |
| 822 | |
| 823 | /* |
| 824 | * READ: Authentication Type |
| 825 | */ |
| 826 | #ifndef NETSNMP_DISABLE_MD5 |
| 827 | if (strncmp(cp, "MD5", 3) == 0) { |
| 828 | memcpy(newuser->authProtocol, usmHMACMD5AuthProtocol, |
| 829 | sizeof(usmHMACMD5AuthProtocol)); |
| 830 | } else |
| 831 | #endif |
| 832 | if (strncmp(cp, "SHA", 3) == 0) { |
| 833 | memcpy(newuser->authProtocol, usmHMACSHA1AuthProtocol, |
| 834 | sizeof(usmHMACSHA1AuthProtocol)); |
| 835 | } else { |
| 836 | config_perror("Unknown authentication protocol"); |
| 837 | usm_free_user(newuser); |
| 838 | return; |
| 839 | } |
| 840 | |
| 841 | cp = skip_token(cp); |
| 842 | |
| 843 | /* |
| 844 | * READ: Authentication Pass Phrase or key |
| 845 | */ |
| 846 | if (!cp) { |
| 847 | config_perror("no authentication pass phrase"); |
| 848 | usm_free_user(newuser); |
| 849 | return; |
| 850 | } |
| 851 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 852 | if (strcmp(buf,"-m") == 0) { |
| 853 | /* a master key is specified */ |
| 854 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 855 | ret = sizeof(userKey); |
| 856 | tmpp = userKey; |
| 857 | userKeyLen = 0; |
| 858 | if (!snmp_hex_to_binary(&tmpp, &ret, &userKeyLen, 0, buf)) { |
| 859 | config_perror("invalid key value argument to -m"); |
| 860 | usm_free_user(newuser); |
| 861 | return; |
| 862 | } |
| 863 | } else if (strcmp(buf,"-l") != 0) { |
| 864 | /* a password is specified */ |
| 865 | userKeyLen = sizeof(userKey); |
| 866 | ret2 = generate_Ku(newuser->authProtocol, newuser->authProtocolLen, |
| 867 | (u_char *) buf, strlen(buf), userKey, &userKeyLen); |
| 868 | if (ret2 != SNMPERR_SUCCESS) { |
| 869 | config_perror("could not generate the authentication key from the " |
| 870 | "supplied pass phrase."); |
| 871 | usm_free_user(newuser); |
| 872 | return; |
| 873 | } |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * And turn it into a localized key |
| 878 | */ |
| 879 | ret2 = sc_get_properlength(newuser->authProtocol, |
| 880 | newuser->authProtocolLen); |
| 881 | if (ret2 <= 0) { |
| 882 | config_perror("Could not get proper authentication protocol key length"); |
| 883 | usm_free_user(newuser); |
| 884 | return; |
| 885 | } |
| 886 | newuser->authKey = (u_char *) malloc(ret2); |
| 887 | |
| 888 | if (strcmp(buf,"-l") == 0) { |
| 889 | /* a local key is directly specified */ |
| 890 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 891 | newuser->authKeyLen = 0; |
| 892 | ret = ret2; |
| 893 | if (!snmp_hex_to_binary(&newuser->authKey, &ret, |
| 894 | &newuser->authKeyLen, 0, buf)) { |
| 895 | config_perror("invalid key value argument to -l"); |
| 896 | usm_free_user(newuser); |
| 897 | return; |
| 898 | } |
| 899 | if (ret != newuser->authKeyLen) { |
| 900 | config_perror("improper key length to -l"); |
| 901 | usm_free_user(newuser); |
| 902 | return; |
| 903 | } |
| 904 | } else { |
| 905 | newuser->authKeyLen = ret2; |
| 906 | ret2 = generate_kul(newuser->authProtocol, newuser->authProtocolLen, |
| 907 | newuser->engineID, newuser->engineIDLen, |
| 908 | userKey, userKeyLen, |
| 909 | newuser->authKey, &newuser->authKeyLen); |
| 910 | if (ret2 != SNMPERR_SUCCESS) { |
| 911 | config_perror("could not generate localized authentication key " |
| 912 | "(Kul) from the master key (Ku)."); |
| 913 | usm_free_user(newuser); |
| 914 | return; |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | if (!cp) |
| 919 | goto add; /* no privacy type (which is legal) */ |
| 920 | |
| 921 | /* |
| 922 | * READ: Privacy Type |
| 923 | */ |
| 924 | testcase = 0; |
| 925 | #ifndef NETSNMP_DISABLE_DES |
| 926 | if (strncmp(cp, "DES", 3) == 0) { |
| 927 | memcpy(newuser->privProtocol, usmDESPrivProtocol, |
| 928 | sizeof(usmDESPrivProtocol)); |
| 929 | testcase = 1; |
| 930 | /* DES uses a 128 bit key, 64 bits of which is a salt */ |
| 931 | privKeyLen = 16; |
| 932 | } |
| 933 | #endif |
| 934 | #ifdef HAVE_AES |
| 935 | if (strncmp(cp, "AES128", 6) == 0 || |
| 936 | strncmp(cp, "AES", 3) == 0) { |
| 937 | memcpy(newuser->privProtocol, usmAESPrivProtocol, |
| 938 | sizeof(usmAESPrivProtocol)); |
| 939 | testcase = 1; |
| 940 | privKeyLen = 16; |
| 941 | } |
| 942 | #endif |
| 943 | if (testcase == 0) { |
| 944 | config_perror("Unknown privacy protocol"); |
| 945 | usm_free_user(newuser); |
| 946 | return; |
| 947 | } |
| 948 | |
| 949 | cp = skip_token(cp); |
| 950 | /* |
| 951 | * READ: Encryption Pass Phrase or key |
| 952 | */ |
| 953 | if (!cp) { |
| 954 | /* |
| 955 | * assume the same as the authentication key |
| 956 | */ |
Bart Van Assche | 9a6f566 | 2013-08-25 10:18:53 +0200 | [diff] [blame] | 957 | newuser->privKey = netsnmp_memdup(newuser->authKey, |
| 958 | newuser->authKeyLen); |
Dave Shield | 00ef569 | 2011-02-22 08:55:48 +0000 | [diff] [blame] | 959 | newuser->privKeyLen = newuser->authKeyLen; |
| 960 | } else { |
| 961 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 962 | |
| 963 | if (strcmp(buf,"-m") == 0) { |
| 964 | /* a master key is specified */ |
| 965 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 966 | ret = sizeof(userKey); |
| 967 | tmpp = userKey; |
| 968 | userKeyLen = 0; |
| 969 | if (!snmp_hex_to_binary(&tmpp, &ret, &userKeyLen, 0, buf)) { |
| 970 | config_perror("invalid key value argument to -m"); |
| 971 | usm_free_user(newuser); |
| 972 | return; |
| 973 | } |
| 974 | } else if (strcmp(buf,"-l") != 0) { |
| 975 | /* a password is specified */ |
| 976 | userKeyLen = sizeof(userKey); |
| 977 | ret2 = generate_Ku(newuser->authProtocol, newuser->authProtocolLen, |
| 978 | (u_char *) buf, strlen(buf), userKey, &userKeyLen); |
| 979 | if (ret2 != SNMPERR_SUCCESS) { |
| 980 | config_perror("could not generate the privacy key from the " |
| 981 | "supplied pass phrase."); |
| 982 | usm_free_user(newuser); |
| 983 | return; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | /* |
| 988 | * And turn it into a localized key |
| 989 | */ |
| 990 | ret2 = sc_get_properlength(newuser->authProtocol, |
| 991 | newuser->authProtocolLen); |
| 992 | if (ret2 < 0) { |
| 993 | config_perror("could not get proper key length to use for the " |
| 994 | "privacy algorithm."); |
| 995 | usm_free_user(newuser); |
| 996 | return; |
| 997 | } |
| 998 | newuser->privKey = (u_char *) malloc(ret2); |
| 999 | |
| 1000 | if (strcmp(buf,"-l") == 0) { |
| 1001 | /* a local key is directly specified */ |
| 1002 | cp = copy_nword(cp, buf, sizeof(buf)); |
| 1003 | ret = ret2; |
| 1004 | newuser->privKeyLen = 0; |
| 1005 | if (!snmp_hex_to_binary(&newuser->privKey, &ret, |
| 1006 | &newuser->privKeyLen, 0, buf)) { |
| 1007 | config_perror("invalid key value argument to -l"); |
| 1008 | usm_free_user(newuser); |
| 1009 | return; |
| 1010 | } |
| 1011 | } else { |
| 1012 | newuser->privKeyLen = ret2; |
| 1013 | ret2 = generate_kul(newuser->authProtocol, newuser->authProtocolLen, |
| 1014 | newuser->engineID, newuser->engineIDLen, |
| 1015 | userKey, userKeyLen, |
| 1016 | newuser->privKey, &newuser->privKeyLen); |
| 1017 | if (ret2 != SNMPERR_SUCCESS) { |
| 1018 | config_perror("could not generate localized privacy key " |
| 1019 | "(Kul) from the master key (Ku)."); |
| 1020 | usm_free_user(newuser); |
| 1021 | return; |
| 1022 | } |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | if ((newuser->privKeyLen >= privKeyLen) || (privKeyLen == 0)){ |
| 1027 | newuser->privKeyLen = privKeyLen; |
| 1028 | } |
| 1029 | else { |
| 1030 | /* The privKey length is smaller than required by privProtocol */ |
| 1031 | usm_free_user(newuser); |
| 1032 | return; |
| 1033 | } |
| 1034 | |
| 1035 | add: |
| 1036 | usm_add_user(newuser); |
| 1037 | DEBUGMSGTL(("usmUser", "created a new user %s at ", newuser->secName)); |
| 1038 | DEBUGMSGHEX(("usmUser", newuser->engineID, newuser->engineIDLen)); |
| 1039 | DEBUGMSG(("usmUser", "\n")); |
| 1040 | } |
| 1041 | |
| 1042 | /*******************************************************************-o-****** |
| 1043 | * engineBoots_conf |
| 1044 | * |
| 1045 | * Parameters: |
| 1046 | * *word |
| 1047 | * *cptr |
| 1048 | * |
| 1049 | * Line syntax: |
| 1050 | * engineBoots <num_boots> |
| 1051 | */ |
| 1052 | void |
| 1053 | engineBoots_conf(const char *word, char *cptr) |
| 1054 | { |
| 1055 | engineBoots = atoi(cptr) + 1; |
| 1056 | DEBUGMSGTL(("snmpv3", "engineBoots: %lu\n", engineBoots)); |
| 1057 | } |
| 1058 | |
| 1059 | /*******************************************************************-o-****** |
| 1060 | * engineIDType_conf |
| 1061 | * |
| 1062 | * Parameters: |
| 1063 | * *word |
| 1064 | * *cptr |
| 1065 | * |
| 1066 | * Line syntax: |
| 1067 | * engineIDType <1 or 3> |
| 1068 | * 1 is default for IPv4 engine ID type. Will automatically |
| 1069 | * chose between IPv4 & IPv6 if either 1 or 2 is specified. |
| 1070 | * 2 is for IPv6. |
| 1071 | * 3 is hardware (MAC) address, currently supported under Linux |
| 1072 | */ |
| 1073 | void |
| 1074 | engineIDType_conf(const char *word, char *cptr) |
| 1075 | { |
| 1076 | engineIDType = atoi(cptr); |
| 1077 | /* |
| 1078 | * verify valid type selected |
| 1079 | */ |
| 1080 | switch (engineIDType) { |
| 1081 | case ENGINEID_TYPE_IPV4: /* IPv4 */ |
| 1082 | case ENGINEID_TYPE_IPV6: /* IPv6 */ |
| 1083 | /* |
| 1084 | * IPV? is always good |
| 1085 | */ |
| 1086 | break; |
| 1087 | #if defined(IFHWADDRLEN) && defined(SIOCGIFHWADDR) |
| 1088 | case ENGINEID_TYPE_MACADDR: /* MAC address */ |
| 1089 | break; |
| 1090 | #endif |
| 1091 | default: |
| 1092 | /* |
| 1093 | * unsupported one chosen |
| 1094 | */ |
| 1095 | config_perror("Unsupported enginedIDType, forcing IPv4"); |
| 1096 | engineIDType = ENGINEID_TYPE_IPV4; |
| 1097 | } |
| 1098 | DEBUGMSGTL(("snmpv3", "engineIDType: %d\n", engineIDType)); |
| 1099 | } |
| 1100 | |
| 1101 | /*******************************************************************-o-****** |
| 1102 | * engineIDNic_conf |
| 1103 | * |
| 1104 | * Parameters: |
| 1105 | * *word |
| 1106 | * *cptr |
| 1107 | * |
| 1108 | * Line syntax: |
| 1109 | * engineIDNic <string> |
| 1110 | * eth0 is default |
| 1111 | */ |
| 1112 | void |
| 1113 | engineIDNic_conf(const char *word, char *cptr) |
| 1114 | { |
| 1115 | /* |
| 1116 | * Make sure they haven't already specified the engineID via the |
| 1117 | * * configuration file |
| 1118 | */ |
| 1119 | if (0 == engineIDIsSet) |
| 1120 | /* |
| 1121 | * engineID has NOT been set via configuration file |
| 1122 | */ |
| 1123 | { |
| 1124 | /* |
| 1125 | * See if already set if so erase & release it |
| 1126 | */ |
| 1127 | if (NULL != engineIDNic) { |
| 1128 | SNMP_FREE(engineIDNic); |
| 1129 | } |
| 1130 | engineIDNic = (u_char *) malloc(strlen(cptr) + 1); |
| 1131 | if (NULL != engineIDNic) { |
| 1132 | strcpy((char *) engineIDNic, cptr); |
| 1133 | DEBUGMSGTL(("snmpv3", "Initializing engineIDNic: %s\n", |
| 1134 | engineIDNic)); |
| 1135 | } else { |
| 1136 | DEBUGMSGTL(("snmpv3", |
| 1137 | "Error allocating memory for engineIDNic!\n")); |
| 1138 | } |
| 1139 | } else { |
| 1140 | DEBUGMSGTL(("snmpv3", |
| 1141 | "NOT setting engineIDNic, engineID already set\n")); |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | /*******************************************************************-o-****** |
| 1146 | * engineID_conf |
| 1147 | * |
| 1148 | * Parameters: |
| 1149 | * *word |
| 1150 | * *cptr |
| 1151 | * |
| 1152 | * This function reads a string from the configuration file and uses that |
| 1153 | * string to initialize the engineID. It's assumed to be human readable. |
| 1154 | */ |
| 1155 | void |
| 1156 | engineID_conf(const char *word, char *cptr) |
| 1157 | { |
| 1158 | setup_engineID(NULL, cptr); |
| 1159 | DEBUGMSGTL(("snmpv3", "initialized engineID with: %s\n", cptr)); |
| 1160 | } |
| 1161 | |
| 1162 | void |
| 1163 | version_conf(const char *word, char *cptr) |
| 1164 | { |
| 1165 | int valid = 0; |
| 1166 | #ifndef NETSNMP_DISABLE_SNMPV1 |
| 1167 | if ((strcmp(cptr, "1") == 0) || |
| 1168 | (strcmp(cptr, "v1") == 0)) { |
| 1169 | netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_SNMPVERSION, |
| 1170 | NETSNMP_DS_SNMP_VERSION_1); /* bogus value */ |
| 1171 | valid = 1; |
| 1172 | } |
| 1173 | #endif |
| 1174 | #ifndef NETSNMP_DISABLE_SNMPV2C |
| 1175 | if ((strcasecmp(cptr, "2c") == 0) || |
| 1176 | (strcasecmp(cptr, "v2c") == 0)) { |
| 1177 | netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_SNMPVERSION, |
| 1178 | NETSNMP_DS_SNMP_VERSION_2c); |
| 1179 | valid = 1; |
| 1180 | } |
| 1181 | #endif |
| 1182 | if ((strcasecmp(cptr, "3" ) == 0) || |
| 1183 | (strcasecmp(cptr, "v3" ) == 0)) { |
| 1184 | netsnmp_ds_set_int(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_SNMPVERSION, |
| 1185 | NETSNMP_DS_SNMP_VERSION_3); |
| 1186 | valid = 1; |
| 1187 | } |
| 1188 | if (!valid) { |
| 1189 | config_perror("Unknown version specification"); |
| 1190 | return; |
| 1191 | } |
| 1192 | DEBUGMSGTL(("snmpv3", "set default version to %d\n", |
| 1193 | netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID, |
| 1194 | NETSNMP_DS_LIB_SNMPVERSION))); |
| 1195 | } |
| 1196 | |
| 1197 | /* |
| 1198 | * oldengineID_conf(const char *, char *): |
| 1199 | * |
| 1200 | * Reads a octet string encoded engineID into the oldEngineID and |
| 1201 | * oldEngineIDLen pointers. |
| 1202 | */ |
| 1203 | void |
| 1204 | oldengineID_conf(const char *word, char *cptr) |
| 1205 | { |
| 1206 | read_config_read_octet_string(cptr, &oldEngineID, &oldEngineIDLength); |
| 1207 | } |
| 1208 | |
| 1209 | /* |
| 1210 | * exactEngineID_conf(const char *, char *): |
| 1211 | * |
| 1212 | * Reads a octet string encoded engineID into the engineID and |
| 1213 | * engineIDLen pointers. |
| 1214 | */ |
| 1215 | void |
| 1216 | exactEngineID_conf(const char *word, char *cptr) |
| 1217 | { |
| 1218 | read_config_read_octet_string(cptr, &engineID, &engineIDLength); |
| 1219 | if (engineIDLength > MAX_ENGINEID_LENGTH) { |
| 1220 | netsnmp_config_error( |
| 1221 | "exactEngineID '%s' too long; truncating to %d bytes", |
| 1222 | cptr, MAX_ENGINEID_LENGTH); |
| 1223 | engineID[MAX_ENGINEID_LENGTH - 1] = '\0'; |
| 1224 | engineIDLength = MAX_ENGINEID_LENGTH; |
| 1225 | } |
| 1226 | engineIDIsSet = 1; |
| 1227 | engineIDType = ENGINEID_TYPE_EXACT; |
| 1228 | } |
| 1229 | |
| 1230 | |
| 1231 | /* |
| 1232 | * merely call |
| 1233 | */ |
| 1234 | void |
| 1235 | get_enginetime_alarm(unsigned int regnum, void *clientargs) |
| 1236 | { |
| 1237 | /* we do this every so (rarely) often just to make sure we watch |
| 1238 | wrapping of the times() output */ |
| 1239 | snmpv3_local_snmpEngineTime(); |
| 1240 | } |
| 1241 | |
| 1242 | /*******************************************************************-o-****** |
| 1243 | * init_snmpv3 |
| 1244 | * |
| 1245 | * Parameters: |
| 1246 | * *type Label for the config file "type" used by calling entity. |
| 1247 | * |
| 1248 | * Set time and engineID. |
| 1249 | * Set parsing functions for config file tokens. |
| 1250 | * Initialize SNMP Crypto API (SCAPI). |
| 1251 | */ |
| 1252 | void |
| 1253 | init_snmpv3(const char *type) |
| 1254 | { |
| 1255 | #if SNMP_USE_TIMES |
| 1256 | struct tms dummy; |
| 1257 | |
| 1258 | /* fixme: -1 is fault code... */ |
| 1259 | snmpv3startClock = times(&dummy); |
| 1260 | |
| 1261 | /* remember how many ticks per second there are, since times() returns this */ |
| 1262 | |
| 1263 | clockticks = sysconf(_SC_CLK_TCK); |
| 1264 | |
| 1265 | #endif /* SNMP_USE_TIMES */ |
| 1266 | |
| 1267 | gettimeofday(&snmpv3starttime, NULL); |
| 1268 | |
| 1269 | if (!type) |
| 1270 | type = "__snmpapp__"; |
| 1271 | |
| 1272 | /* |
| 1273 | * we need to be called back later |
| 1274 | */ |
| 1275 | snmp_register_callback(SNMP_CALLBACK_LIBRARY, |
| 1276 | SNMP_CALLBACK_POST_READ_CONFIG, |
| 1277 | init_snmpv3_post_config, NULL); |
| 1278 | |
| 1279 | snmp_register_callback(SNMP_CALLBACK_LIBRARY, |
| 1280 | SNMP_CALLBACK_POST_PREMIB_READ_CONFIG, |
| 1281 | init_snmpv3_post_premib_config, NULL); |
| 1282 | /* |
| 1283 | * we need to be called back later |
| 1284 | */ |
| 1285 | snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_STORE_DATA, |
| 1286 | snmpv3_store, (void *) strdup(type)); |
| 1287 | |
| 1288 | /* |
| 1289 | * Free stuff at shutdown time |
| 1290 | */ |
| 1291 | snmp_register_callback(SNMP_CALLBACK_LIBRARY, |
| 1292 | SNMP_CALLBACK_SHUTDOWN, |
| 1293 | free_enginetime_on_shutdown, NULL); |
| 1294 | |
| 1295 | /* |
| 1296 | * initialize submodules |
| 1297 | */ |
| 1298 | /* |
| 1299 | * NOTE: this must be after the callbacks are registered above, |
| 1300 | * since they need to be called before the USM callbacks. |
| 1301 | */ |
| 1302 | init_secmod(); |
| 1303 | |
| 1304 | /* |
| 1305 | * register all our configuration handlers (ack, there's a lot) |
| 1306 | */ |
| 1307 | |
| 1308 | /* |
| 1309 | * handle engineID setup before everything else which may depend on it |
| 1310 | */ |
| 1311 | register_prenetsnmp_mib_handler(type, "engineID", engineID_conf, NULL, |
| 1312 | "string"); |
| 1313 | register_prenetsnmp_mib_handler(type, "oldEngineID", oldengineID_conf, |
| 1314 | NULL, NULL); |
| 1315 | register_prenetsnmp_mib_handler(type, "exactEngineID", exactEngineID_conf, |
| 1316 | NULL, NULL); |
| 1317 | register_prenetsnmp_mib_handler(type, "engineIDType", |
| 1318 | engineIDType_conf, NULL, "num"); |
| 1319 | register_prenetsnmp_mib_handler(type, "engineIDNic", engineIDNic_conf, |
| 1320 | NULL, "string"); |
| 1321 | register_config_handler(type, "engineBoots", engineBoots_conf, NULL, |
| 1322 | NULL); |
| 1323 | |
| 1324 | /* |
| 1325 | * default store config entries |
| 1326 | */ |
| 1327 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defSecurityName", |
| 1328 | NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_SECNAME); |
| 1329 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defContext", |
| 1330 | NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_CONTEXT); |
| 1331 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defPassphrase", |
| 1332 | NETSNMP_DS_LIBRARY_ID, |
| 1333 | NETSNMP_DS_LIB_PASSPHRASE); |
| 1334 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defAuthPassphrase", |
| 1335 | NETSNMP_DS_LIBRARY_ID, |
| 1336 | NETSNMP_DS_LIB_AUTHPASSPHRASE); |
| 1337 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defPrivPassphrase", |
| 1338 | NETSNMP_DS_LIBRARY_ID, |
| 1339 | NETSNMP_DS_LIB_PRIVPASSPHRASE); |
| 1340 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defAuthMasterKey", |
| 1341 | NETSNMP_DS_LIBRARY_ID, |
| 1342 | NETSNMP_DS_LIB_AUTHMASTERKEY); |
| 1343 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defPrivMasterKey", |
| 1344 | NETSNMP_DS_LIBRARY_ID, |
| 1345 | NETSNMP_DS_LIB_PRIVMASTERKEY); |
| 1346 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defAuthLocalizedKey", |
| 1347 | NETSNMP_DS_LIBRARY_ID, |
| 1348 | NETSNMP_DS_LIB_AUTHLOCALIZEDKEY); |
| 1349 | netsnmp_ds_register_config(ASN_OCTET_STR, "snmp", "defPrivLocalizedKey", |
| 1350 | NETSNMP_DS_LIBRARY_ID, |
| 1351 | NETSNMP_DS_LIB_PRIVLOCALIZEDKEY); |
| 1352 | register_config_handler("snmp", "defVersion", version_conf, NULL, |
| 1353 | "1|2c|3"); |
| 1354 | |
| 1355 | register_config_handler("snmp", "defAuthType", snmpv3_authtype_conf, |
| 1356 | NULL, "MD5|SHA"); |
| 1357 | register_config_handler("snmp", "defPrivType", snmpv3_privtype_conf, |
| 1358 | NULL, |
| 1359 | #ifdef HAVE_AES |
| 1360 | "DES|AES"); |
| 1361 | #else |
| 1362 | "DES (AES support not available)"); |
| 1363 | #endif |
| 1364 | register_config_handler("snmp", "defSecurityLevel", |
| 1365 | snmpv3_secLevel_conf, NULL, |
| 1366 | "noAuthNoPriv|authNoPriv|authPriv"); |
| 1367 | register_config_handler(type, "userSetAuthPass", usm_set_password, |
| 1368 | NULL, NULL); |
| 1369 | register_config_handler(type, "userSetPrivPass", usm_set_password, |
| 1370 | NULL, NULL); |
| 1371 | register_config_handler(type, "userSetAuthKey", usm_set_password, NULL, |
| 1372 | NULL); |
| 1373 | register_config_handler(type, "userSetPrivKey", usm_set_password, NULL, |
| 1374 | NULL); |
| 1375 | register_config_handler(type, "userSetAuthLocalKey", usm_set_password, |
| 1376 | NULL, NULL); |
| 1377 | register_config_handler(type, "userSetPrivLocalKey", usm_set_password, |
| 1378 | NULL, NULL); |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * initializations for SNMPv3 to be called after the configuration files |
| 1383 | * have been read. |
| 1384 | */ |
| 1385 | |
| 1386 | int |
| 1387 | init_snmpv3_post_config(int majorid, int minorid, void *serverarg, |
| 1388 | void *clientarg) |
| 1389 | { |
| 1390 | |
| 1391 | size_t engineIDLen; |
| 1392 | u_char *c_engineID; |
| 1393 | |
| 1394 | c_engineID = snmpv3_generate_engineID(&engineIDLen); |
| 1395 | |
| 1396 | if (engineIDLen == 0 || !c_engineID) { |
| 1397 | /* |
| 1398 | * Somethine went wrong - help! |
| 1399 | */ |
| 1400 | SNMP_FREE(c_engineID); |
| 1401 | return SNMPERR_GENERR; |
| 1402 | } |
| 1403 | |
| 1404 | /* |
| 1405 | * if our engineID has changed at all, the boots record must be set to 1 |
| 1406 | */ |
| 1407 | if (engineIDLen != (int) oldEngineIDLength || |
| 1408 | oldEngineID == NULL || c_engineID == NULL || |
| 1409 | memcmp(oldEngineID, c_engineID, engineIDLen) != 0) { |
| 1410 | engineBoots = 1; |
| 1411 | } |
| 1412 | |
| 1413 | /* |
| 1414 | * set our local engineTime in the LCD timing cache |
| 1415 | */ |
| 1416 | set_enginetime(c_engineID, engineIDLen, |
| 1417 | snmpv3_local_snmpEngineBoots(), |
| 1418 | snmpv3_local_snmpEngineTime(), TRUE); |
| 1419 | |
| 1420 | SNMP_FREE(c_engineID); |
| 1421 | return SNMPERR_SUCCESS; |
| 1422 | } |
| 1423 | |
| 1424 | int |
| 1425 | init_snmpv3_post_premib_config(int majorid, int minorid, void *serverarg, |
| 1426 | void *clientarg) |
| 1427 | { |
| 1428 | if (!engineIDIsSet) |
| 1429 | setup_engineID(NULL, NULL); |
| 1430 | |
| 1431 | return SNMPERR_SUCCESS; |
| 1432 | } |
| 1433 | |
| 1434 | /*******************************************************************-o-****** |
| 1435 | * store_snmpv3 |
| 1436 | * |
| 1437 | * Parameters: |
| 1438 | * *type |
| 1439 | */ |
| 1440 | int |
| 1441 | snmpv3_store(int majorID, int minorID, void *serverarg, void *clientarg) |
| 1442 | { |
| 1443 | char line[SNMP_MAXBUF_SMALL]; |
| 1444 | u_char c_engineID[SNMP_MAXBUF_SMALL]; |
| 1445 | int engineIDLen; |
| 1446 | const char *type = (const char *) clientarg; |
| 1447 | |
| 1448 | if (type == NULL) /* should never happen, since the arg is ours */ |
| 1449 | type = "unknown"; |
| 1450 | |
| 1451 | sprintf(line, "engineBoots %ld", engineBoots); |
| 1452 | read_config_store(type, line); |
| 1453 | |
| 1454 | engineIDLen = snmpv3_get_engineID(c_engineID, SNMP_MAXBUF_SMALL); |
| 1455 | |
| 1456 | if (engineIDLen) { |
| 1457 | /* |
| 1458 | * store the engineID used for this run |
| 1459 | */ |
| 1460 | sprintf(line, "oldEngineID "); |
| 1461 | read_config_save_octet_string(line + strlen(line), c_engineID, |
| 1462 | engineIDLen); |
| 1463 | read_config_store(type, line); |
| 1464 | } |
| 1465 | return SNMPERR_SUCCESS; |
| 1466 | } /* snmpv3_store() */ |
| 1467 | |
| 1468 | u_long |
| 1469 | snmpv3_local_snmpEngineBoots(void) |
| 1470 | { |
| 1471 | return engineBoots; |
| 1472 | } |
| 1473 | |
| 1474 | |
| 1475 | /*******************************************************************-o-****** |
| 1476 | * snmpv3_get_engineID |
| 1477 | * |
| 1478 | * Parameters: |
| 1479 | * *buf |
| 1480 | * buflen |
| 1481 | * |
| 1482 | * Returns: |
| 1483 | * Length of engineID On Success |
| 1484 | * SNMPERR_GENERR Otherwise. |
| 1485 | * |
| 1486 | * |
| 1487 | * Store engineID in buf; return the length. |
| 1488 | * |
| 1489 | */ |
| 1490 | size_t |
| 1491 | snmpv3_get_engineID(u_char * buf, size_t buflen) |
| 1492 | { |
| 1493 | /* |
| 1494 | * Sanity check. |
| 1495 | */ |
| 1496 | if (!buf || (buflen < engineIDLength)) { |
| 1497 | return 0; |
| 1498 | } |
Dave Shield | 41e26ab | 2011-02-25 11:10:00 +0000 | [diff] [blame] | 1499 | if (!engineID) { |
| 1500 | return 0; |
| 1501 | } |
Dave Shield | 00ef569 | 2011-02-22 08:55:48 +0000 | [diff] [blame] | 1502 | |
| 1503 | memcpy(buf, engineID, engineIDLength); |
| 1504 | return engineIDLength; |
| 1505 | |
| 1506 | } /* end snmpv3_get_engineID() */ |
| 1507 | |
| 1508 | /*******************************************************************-o-****** |
| 1509 | * snmpv3_clone_engineID |
| 1510 | * |
| 1511 | * Parameters: |
| 1512 | * **dest |
| 1513 | * *dest_len |
| 1514 | * src |
| 1515 | * srclen |
| 1516 | * |
| 1517 | * Returns: |
| 1518 | * Length of engineID On Success |
| 1519 | * 0 Otherwise. |
| 1520 | * |
| 1521 | * |
| 1522 | * Clones engineID, creates memory |
| 1523 | * |
| 1524 | */ |
| 1525 | int |
| 1526 | snmpv3_clone_engineID(u_char ** dest, size_t * destlen, u_char * src, |
| 1527 | size_t srclen) |
| 1528 | { |
| 1529 | if (!dest || !destlen) |
| 1530 | return 0; |
| 1531 | |
| 1532 | if (*dest) { |
| 1533 | SNMP_FREE(*dest); |
| 1534 | *dest = NULL; |
| 1535 | } |
| 1536 | *destlen = 0; |
| 1537 | |
| 1538 | if (srclen && src) { |
| 1539 | *dest = (u_char *) malloc(srclen); |
| 1540 | if (*dest == NULL) |
| 1541 | return 0; |
| 1542 | memmove(*dest, src, srclen); |
| 1543 | *destlen = srclen; |
| 1544 | } |
| 1545 | return *destlen; |
| 1546 | } /* end snmpv3_clone_engineID() */ |
| 1547 | |
| 1548 | |
| 1549 | /*******************************************************************-o-****** |
| 1550 | * snmpv3_generate_engineID |
| 1551 | * |
| 1552 | * Parameters: |
| 1553 | * *length |
| 1554 | * |
| 1555 | * Returns: |
| 1556 | * Pointer to copy of engineID On Success. |
| 1557 | * NULL If malloc() or snmpv3_get_engineID() |
| 1558 | * fail. |
| 1559 | * |
| 1560 | * Generates a malloced copy of our engineID. |
| 1561 | * |
| 1562 | * 'length' is set to the length of engineID -OR- < 0 on failure. |
| 1563 | */ |
| 1564 | u_char * |
| 1565 | snmpv3_generate_engineID(size_t * length) |
| 1566 | { |
| 1567 | u_char *newID; |
| 1568 | newID = (u_char *) malloc(engineIDLength); |
| 1569 | |
| 1570 | if (newID) { |
| 1571 | *length = snmpv3_get_engineID(newID, engineIDLength); |
| 1572 | } |
| 1573 | |
| 1574 | if (*length == 0) { |
| 1575 | SNMP_FREE(newID); |
| 1576 | newID = NULL; |
| 1577 | } |
| 1578 | |
| 1579 | return newID; |
| 1580 | |
| 1581 | } /* end snmpv3_generate_engineID() */ |
| 1582 | |
| 1583 | /* |
| 1584 | * snmpv3_local_snmpEngineTime(): return the number of seconds since the |
| 1585 | * snmpv3 engine last incremented engine_boots |
| 1586 | */ |
| 1587 | u_long |
| 1588 | snmpv3_local_snmpEngineTime(void) |
| 1589 | { |
| 1590 | #ifdef SNMP_USE_TIMES |
| 1591 | struct tms dummy; |
| 1592 | clock_t now = times(&dummy); |
| 1593 | /* fixme: -1 is fault code... */ |
| 1594 | unsigned int result; |
| 1595 | |
| 1596 | if (now < snmpv3startClock) { |
| 1597 | result = UINT_MAX - (snmpv3startClock - now); |
| 1598 | } else { |
| 1599 | result = now - snmpv3startClock; |
| 1600 | } |
| 1601 | if (result < lastcalltime) { |
| 1602 | /* wrapped */ |
| 1603 | wrapcounter++; |
| 1604 | } |
| 1605 | lastcalltime = result; |
| 1606 | result = (UINT_MAX/clockticks)*wrapcounter + result/clockticks; |
| 1607 | |
| 1608 | return result; |
| 1609 | #else /* !SNMP_USE_TIMES */ |
| 1610 | struct timeval now; |
| 1611 | |
| 1612 | gettimeofday(&now, NULL); |
| 1613 | return calculate_sectime_diff(&now, &snmpv3starttime); |
| 1614 | #endif /* HAVE_SYS_TIMES_H */ |
| 1615 | } |
| 1616 | |
| 1617 | |
| 1618 | |
| 1619 | /* |
| 1620 | * Code only for Linux systems |
| 1621 | */ |
| 1622 | #if defined(IFHWADDRLEN) && defined(SIOCGIFHWADDR) |
| 1623 | static int |
| 1624 | getHwAddress(const char *networkDevice, /* e.g. "eth0", "eth1" */ |
| 1625 | char *addressOut) |
| 1626 | { /* return address. Len=IFHWADDRLEN */ |
| 1627 | /* |
| 1628 | * getHwAddress(...) |
| 1629 | * * |
| 1630 | * * This function will return a Network Interfaces Card's Hardware |
| 1631 | * * address (aka MAC address). |
| 1632 | * * |
| 1633 | * * Input Parameter(s): |
| 1634 | * * networkDevice - a null terminated string with the name of a network |
| 1635 | * * device. Examples: eth0, eth1, etc... |
| 1636 | * * |
| 1637 | * * Output Parameter(s): |
| 1638 | * * addressOut - This is the binary value of the hardware address. |
| 1639 | * * This value is NOT converted into a hexadecimal string. |
| 1640 | * * The caller must pre-allocate for a return value of |
| 1641 | * * length IFHWADDRLEN |
| 1642 | * * |
| 1643 | * * Return value: This function will return zero (0) for success. If |
| 1644 | * * an error occurred the function will return -1. |
| 1645 | * * |
| 1646 | * * Caveats: This has only been tested on Ethernet networking cards. |
| 1647 | */ |
| 1648 | int sock; /* our socket */ |
| 1649 | struct ifreq request; /* struct which will have HW address */ |
| 1650 | |
| 1651 | if ((NULL == networkDevice) || (NULL == addressOut)) { |
| 1652 | return -1; |
| 1653 | } |
| 1654 | /* |
| 1655 | * In order to find out the hardware (MAC) address of our system under |
| 1656 | * * Linux we must do the following: |
| 1657 | * * 1. Create a socket |
| 1658 | * * 2. Do an ioctl(...) call with the SIOCGIFHWADDRLEN operation. |
| 1659 | */ |
| 1660 | sock = socket(AF_INET, SOCK_DGRAM, 0); |
| 1661 | if (sock < 0) { |
| 1662 | return -1; |
| 1663 | } |
| 1664 | /* |
| 1665 | * erase the request block |
| 1666 | */ |
| 1667 | memset(&request, 0, sizeof(request)); |
| 1668 | /* |
| 1669 | * copy the name of the net device we want to find the HW address for |
| 1670 | */ |
Bart Van Assche | b24ee7c | 2012-01-04 08:40:39 +0100 | [diff] [blame] | 1671 | strlcpy(request.ifr_name, networkDevice, IFNAMSIZ); |
Dave Shield | 00ef569 | 2011-02-22 08:55:48 +0000 | [diff] [blame] | 1672 | /* |
| 1673 | * Get the HW address |
| 1674 | */ |
| 1675 | if (ioctl(sock, SIOCGIFHWADDR, &request)) { |
| 1676 | close(sock); |
| 1677 | return -1; |
| 1678 | } |
| 1679 | close(sock); |
| 1680 | memcpy(addressOut, request.ifr_hwaddr.sa_data, IFHWADDRLEN); |
| 1681 | return 0; |
| 1682 | } |
| 1683 | #endif |
| 1684 | |
| 1685 | #ifdef NETSNMP_ENABLE_TESTING_CODE |
| 1686 | /* |
| 1687 | * snmpv3_set_engineBootsAndTime(): this function does not exist. Go away. |
| 1688 | */ |
| 1689 | /* |
| 1690 | * It certainly should never be used, unless in a testing scenero, |
| 1691 | * which is why it was created |
| 1692 | */ |
| 1693 | void |
| 1694 | snmpv3_set_engineBootsAndTime(int boots, int ttime) |
| 1695 | { |
| 1696 | engineBoots = boots; |
| 1697 | gettimeofday(&snmpv3starttime, NULL); |
| 1698 | snmpv3starttime.tv_sec -= ttime; |
| 1699 | } |
| 1700 | #endif |