/*- * Copyright (c) 2005-2006 The FreeBSD Project * All rights reserved. * * Author: Shteryana Shopova * * Redistribution of this software and documentation and use in source and * binary forms, with or without modification, are permitted provided that * the following conditions are met: * * 1. Redistributions of source code or documentation must retain the above * copyright notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Helper functions for snmp client tools */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bsnmptc.h" #include "bsnmptools.h" /* Internal variable to turn on library debugging for testing and to * find bugs. It is not exported via the header file. * XXX should we cover it by some #ifdef BSNMPTOOLS_DEBUG? */ int _bsnmptools_debug = 0; /* Default files to import mapping from if none explicitly provided. */ #define bsnmpd_defs "/usr/share/snmp/defs/tree.def" #define mibII_defs "/usr/share/snmp/defs/mibII_tree.def" /* * The .iso.org.dod oid that has to be prepended to every OID when requesting * a value. */ const struct asn_oid IsoOrgDod_OID = { 3, { 1, 3, 6 } }; #define SNMP_ERR_UNKNOWN 0 /* * An array of error strings corresponding to error definitions from libbsnmp. */ static const struct { const char *str; int32_t error; } error_strings[] = { { "Unknown", SNMP_ERR_UNKNOWN }, { "Too big ", SNMP_ERR_TOOBIG }, { "No such Name", SNMP_ERR_NOSUCHNAME }, { "Bad Value", SNMP_ERR_BADVALUE }, { "Readonly", SNMP_ERR_READONLY }, { "General error", SNMP_ERR_GENERR }, { "No access", SNMP_ERR_NO_ACCESS }, { "Wrong type", SNMP_ERR_WRONG_TYPE }, { "Wrong length", SNMP_ERR_WRONG_LENGTH }, { "Wrong encoding", SNMP_ERR_WRONG_ENCODING }, { "Wrong value", SNMP_ERR_WRONG_VALUE }, { "No creation", SNMP_ERR_NO_CREATION }, { "Inconsistent value", SNMP_ERR_INCONS_VALUE }, { "Resource unavailable", SNMP_ERR_RES_UNAVAIL }, { "Commit failed", SNMP_ERR_COMMIT_FAILED }, { "Undo failed", SNMP_ERR_UNDO_FAILED }, { "Authorization error", SNMP_ERR_AUTH_ERR }, { "Not writable", SNMP_ERR_NOT_WRITEABLE }, { "Inconsistent name", SNMP_ERR_INCONS_NAME }, { NULL, 0 } }; /* This one and any following are exceptions. */ #define SNMP_SYNTAX_UNKNOWN SNMP_SYNTAX_NOSUCHOBJECT static const struct { const char *str; enum snmp_syntax stx; } syntax_strings[] = { { "Null", SNMP_SYNTAX_NULL }, { "Integer", SNMP_SYNTAX_INTEGER }, { "OctetString", SNMP_SYNTAX_OCTETSTRING }, { "OID", SNMP_SYNTAX_OID }, { "IpAddress", SNMP_SYNTAX_IPADDRESS }, { "Counter32", SNMP_SYNTAX_COUNTER }, { "Gauge", SNMP_SYNTAX_GAUGE }, { "TimeTicks", SNMP_SYNTAX_TIMETICKS }, { "Counter64", SNMP_SYNTAX_COUNTER64 }, { "Unknown", SNMP_SYNTAX_UNKNOWN }, }; int snmptool_init(struct snmp_toolinfo *snmptoolctx) { char *str; size_t slen; memset(snmptoolctx, 0, sizeof(struct snmp_toolinfo)); snmptoolctx->objects = 0; snmptoolctx->mappings = NULL; snmptoolctx->flags = SNMP_PDU_GET; /* XXX */ SLIST_INIT(&snmptoolctx->filelist); snmp_client_init(&snmp_client); SET_MAXREP(snmptoolctx, SNMP_MAX_REPETITIONS); if (add_filename(snmptoolctx, bsnmpd_defs, &IsoOrgDod_OID, 0) < 0) warnx("Error adding file %s to list", bsnmpd_defs); if (add_filename(snmptoolctx, mibII_defs, &IsoOrgDod_OID, 0) < 0) warnx("Error adding file %s to list", mibII_defs); /* Read the environment */ if ((str = getenv("SNMPAUTH")) != NULL) { slen = strlen(str); if (slen == strlen("md5") && strcasecmp(str, "md5") == 0) snmp_client.user.auth_proto = SNMP_AUTH_HMAC_MD5; else if (slen == strlen("sha")&& strcasecmp(str, "sha") == 0) snmp_client.user.auth_proto = SNMP_AUTH_HMAC_SHA; else if (slen != 0) warnx("Bad authentication type - %s in SNMPAUTH", str); } if ((str = getenv("SNMPPRIV")) != NULL) { slen = strlen(str); if (slen == strlen("des") && strcasecmp(str, "des") == 0) snmp_client.user.priv_proto = SNMP_PRIV_DES; else if (slen == strlen("aes")&& strcasecmp(str, "aes") == 0) snmp_client.user.priv_proto = SNMP_PRIV_AES; else if (slen != 0) warnx("Bad privacy type - %s in SNMPPRIV", str); } if ((str = getenv("SNMPUSER")) != NULL) { if ((slen = strlen(str)) > sizeof(snmp_client.user.sec_name)) { warnx("Username too long - %s in SNMPUSER", str); return (-1); } if (slen > 0) { strlcpy(snmp_client.user.sec_name, str, sizeof(snmp_client.user.sec_name)); snmp_client.version = SNMP_V3; } } if ((str = getenv("SNMPPASSWD")) != NULL) { if ((slen = strlen(str)) > MAXSTR) slen = MAXSTR - 1; if ((snmptoolctx->passwd = malloc(slen + 1)) == NULL) { warn("malloc() failed"); return (-1); } if (slen > 0) strlcpy(snmptoolctx->passwd, str, slen + 1); } return (0); } #define OBJECT_IDX_LIST(o) o->info->table_idx->index_list /* * Walk through the file list and import string<->oid mappings from each file. */ int32_t snmp_import_all(struct snmp_toolinfo *snmptoolctx) { int32_t fc; struct fname *tmp; if (snmptoolctx == NULL) return (-1); if (ISSET_NUMERIC(snmptoolctx)) return (0); if ((snmptoolctx->mappings = snmp_mapping_init()) == NULL) return (-1); fc = 0; if (SLIST_EMPTY(&snmptoolctx->filelist)) { warnx("No files to read OID <-> string conversions from"); return (-1); } else { SLIST_FOREACH(tmp, &snmptoolctx->filelist, link) { if (tmp->done) continue; if (snmp_import_file(snmptoolctx, tmp) < 0) { fc = -1; break; } fc++; } } snmp_mapping_dump(snmptoolctx); return (fc); } /* * Add a filename to the file list - the initial idea of keeping a list with all * files to read OIDs from was that an application might want to have loaded in * memory the OIDs from a single file only and when done with them read the OIDs * from another file. This is not used yet but might be a good idea at some * point. Size argument is number of bytes in string including trailing '\0', * not string length. */ int32_t add_filename(struct snmp_toolinfo *snmptoolctx, const char *filename, const struct asn_oid *cut, int32_t done) { char *fstring; struct fname *entry; if (snmptoolctx == NULL) return (-1); /* Make sure file was not in list. */ SLIST_FOREACH(entry, &snmptoolctx->filelist, link) { if (strncmp(entry->name, filename, strlen(entry->name)) == 0) return (0); } if ((fstring = strdup(filename)) == NULL) { warn("strdup() failed"); return (-1); } if ((entry = calloc(1, sizeof(struct fname))) == NULL) { warn("calloc() failed"); free(fstring); return (-1); } if (cut != NULL) asn_append_oid(&(entry->cut), cut); entry->name = fstring; entry->done = done; SLIST_INSERT_HEAD(&snmptoolctx->filelist, entry, link); return (1); } void free_filelist(struct snmp_toolinfo *snmptoolctx) { struct fname *f; if (snmptoolctx == NULL) return; /* XXX error handling */ while ((f = SLIST_FIRST(&snmptoolctx->filelist)) != NULL) { SLIST_REMOVE_HEAD(&snmptoolctx->filelist, link); if (f->name) free(f->name); free(f); } } static char isvalid_fchar(char c, int pos) { if (isalpha(c)|| c == '/'|| c == '_' || c == '.' || c == '~' || (pos != 0 && isdigit(c))){ return (c); } if (c == '\0') return (0); if (!isascii(c) || !isprint(c)) warnx("Unexpected character %#2x", (u_int) c); else warnx("Illegal character '%c'", c); return (-1); } /* * Re-implement getsubopt from scratch, because the second argument is broken * and will not compile with WARNS=5. * Copied from src/contrib/bsnmp/snmpd/main.c. */ static int getsubopt1(char **arg, const char *const *options, char **valp, char **optp) { static const char *const delim = ",\t "; u_int i; char *ptr; *optp = NULL; /* Skip leading junk. */ for (ptr = *arg; *ptr != '\0'; ptr++) if (strchr(delim, *ptr) == NULL) break; if (*ptr == '\0') { *arg = ptr; return (-1); } *optp = ptr; /* Find the end of the option. */ while (*++ptr != '\0') if (strchr(delim, *ptr) != NULL || *ptr == '=') break; if (*ptr != '\0') { if (*ptr == '=') { *ptr++ = '\0'; *valp = ptr; while (*ptr != '\0' && strchr(delim, *ptr) == NULL) ptr++; if (*ptr != '\0') *ptr++ = '\0'; } else *ptr++ = '\0'; } *arg = ptr; for (i = 0; *options != NULL; options++, i++) if (strcmp(*optp, *options) == 0) return (i); return (-1); } static int32_t parse_path(char *value) { int32_t i, len; if (value == NULL) return (-1); for (len = 0; len < MAXPATHLEN; len++) { i = isvalid_fchar(*(value + len), len) ; if (i == 0) break; else if (i < 0) return (-1); } if (len >= MAXPATHLEN || value[len] != '\0') { warnx("Bad pathname - '%s'", value); return (-1); } return (len); } static int32_t parse_flist(struct snmp_toolinfo *snmptoolctx, char *value, char *path, const struct asn_oid *cut) { int32_t namelen; char filename[MAXPATHLEN + 1]; if (value == NULL) return (-1); do { memset(filename, 0, MAXPATHLEN + 1); if (isalpha(*value) && (path == NULL || path[0] == '\0')) { strlcpy(filename, SNMP_DEFS_DIR, MAXPATHLEN + 1); namelen = strlen(SNMP_DEFS_DIR); } else if (path != NULL){ strlcpy(filename, path, MAXPATHLEN + 1); namelen = strlen(path); } else namelen = 0; for ( ; namelen < MAXPATHLEN; value++) { if (isvalid_fchar(*value, namelen) > 0) { filename[namelen++] = *value; continue; } if (*value == ',' ) value++; else if (*value == '\0') ; else { if (!isascii(*value) || !isprint(*value)) warnx("Unexpected character %#2x in" " filename", (u_int) *value); else warnx("Illegal character '%c' in" " filename", *value); return (-1); } filename[namelen]='\0'; break; } if ((namelen == MAXPATHLEN) && (filename[MAXPATHLEN] != '\0')) { warnx("Filename %s too long", filename); return (-1); } if (add_filename(snmptoolctx, filename, cut, 0) < 0) { warnx("Error adding file %s to list", filename); return (-1); } } while (*value != '\0'); return(1); } static int32_t parse_ascii(char *ascii, uint8_t *binstr, size_t binlen) { char dptr[3]; size_t count; int32_t alen, i, saved_errno; uint32_t val; /* Filter 0x at the beginning */ if ((alen = strlen(ascii)) > 2 && ascii[0] == '0' && ascii[1] == 'x') i = 2; else i = 0; saved_errno = errno; errno = 0; for (count = 0; i < alen; i += 2) { /* XXX: consider strlen(ascii) % 2 != 0 */ dptr[0] = ascii[i]; dptr[1] = ascii[i + 1]; dptr[2] = '\0'; if ((val = strtoul(dptr, NULL, 16)) > 0xFF || errno != 0) { errno = saved_errno; return (-1); } binstr[count] = (uint8_t) val; if (++count >= binlen) { warnx("Key %s too long - truncating to %zu octets", ascii, binlen); break; } } return (count); } /* * Functions to parse common input options for client tools and fill in the * snmp_client structure. */ int32_t parse_authentication(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg) { int32_t /* count, */ subopt; char *val, *option; const char *const subopts[] = { "proto", "key", NULL }; assert(opt_arg != NULL); /* count = 1; */ while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) { switch (subopt) { case 0: if (val == NULL) { warnx("Suboption 'proto' requires an argument"); return (-1); } if (strlen(val) != 3) { warnx("Unknown auth protocol - %s", val); return (-1); } if (strncasecmp("md5", val, strlen("md5")) == 0) snmp_client.user.auth_proto = SNMP_AUTH_HMAC_MD5; else if (strncasecmp("sha", val, strlen("sha")) == 0) snmp_client.user.auth_proto = SNMP_AUTH_HMAC_SHA; else { warnx("Unknown auth protocol - %s", val); return (-1); } break; case 1: if (val == NULL) { warnx("Suboption 'key' requires an argument"); return (-1); } if (parse_ascii(val, snmp_client.user.auth_key, SNMP_AUTH_KEY_SIZ) < 0) { warnx("Bad authentication key- %s", val); return (-1); } break; default: warnx("Unknown suboption - '%s'", suboptarg); return (-1); } /* count += 1; */ } return (2/* count */); } int32_t parse_privacy(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg) { int32_t /* count, */ subopt; char *val, *option; const char *const subopts[] = { "proto", "key", NULL }; assert(opt_arg != NULL); /* count = 1; */ while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) { switch (subopt) { case 0: if (val == NULL) { warnx("Suboption 'proto' requires an argument"); return (-1); } if (strlen(val) != 3) { warnx("Unknown privacy protocol - %s", val); return (-1); } if (strncasecmp("aes", val, strlen("aes")) == 0) snmp_client.user.priv_proto = SNMP_PRIV_AES; else if (strncasecmp("des", val, strlen("des")) == 0) snmp_client.user.priv_proto = SNMP_PRIV_DES; else { warnx("Unknown privacy protocol - %s", val); return (-1); } break; case 1: if (val == NULL) { warnx("Suboption 'key' requires an argument"); return (-1); } if (parse_ascii(val, snmp_client.user.priv_key, SNMP_PRIV_KEY_SIZ) < 0) { warnx("Bad privacy key- %s", val); return (-1); } break; default: warnx("Unknown suboption - '%s'", suboptarg); return (-1); } /* count += 1; */ } return (2/* count */); } int32_t parse_context(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg) { int32_t /* count, */ subopt; char *val, *option; const char *const subopts[] = { "context", "context-engine", NULL }; assert(opt_arg != NULL); /* count = 1; */ while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) { switch (subopt) { case 0: if (val == NULL) { warnx("Suboption 'context' - no argument"); return (-1); } strlcpy(snmp_client.cname, val, SNMP_CONTEXT_NAME_SIZ); break; case 1: if (val == NULL) { warnx("Suboption 'context-engine' - no argument"); return (-1); } if ((int32_t)(snmp_client.clen = parse_ascii(val, snmp_client.cengine, SNMP_ENGINE_ID_SIZ)) == -1) { warnx("Bad EngineID - %s", val); return (-1); } break; default: warnx("Unknown suboption - '%s'", suboptarg); return (-1); } /* count += 1; */ } return (2/* count */); } int32_t parse_user_security(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg) { int32_t /* count, */ subopt, saved_errno; char *val, *option; const char *const subopts[] = { "engine", "engine-boots", "engine-time", "name", NULL }; assert(opt_arg != NULL); /* count = 1; */ while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) { switch (subopt) { case 0: if (val == NULL) { warnx("Suboption 'engine' - no argument"); return (-1); } snmp_client.engine.engine_len = parse_ascii(val, snmp_client.engine.engine_id, SNMP_ENGINE_ID_SIZ); if ((int32_t)snmp_client.engine.engine_len == -1) { warnx("Bad EngineID - %s", val); return (-1); } break; case 1: if (val == NULL) { warnx("Suboption 'engine-boots' - no argument"); return (-1); } saved_errno = errno; errno = 0; snmp_client.engine.engine_boots = strtoul(val, NULL, 10); if (errno != 0) { warn("Bad 'engine-boots' value %s", val); errno = saved_errno; return (-1); } errno = saved_errno; break; case 2: if (val == NULL) { warnx("Suboption 'engine-time' - no argument"); return (-1); } saved_errno = errno; errno = 0; snmp_client.engine.engine_time = strtoul(val, NULL, 10); if (errno != 0) { warn("Bad 'engine-time' value %s", val); errno = saved_errno; return (-1); } errno = saved_errno; break; case 3: strlcpy(snmp_client.user.sec_name, val, SNMP_ADM_STR32_SIZ); break; default: warnx("Unknown suboption - '%s'", suboptarg); return (-1); } /* count += 1; */ } return (2/* count */); } int32_t parse_file(struct snmp_toolinfo *snmptoolctx, char *opt_arg) { assert(opt_arg != NULL); if (parse_flist(snmptoolctx, opt_arg, NULL, &IsoOrgDod_OID) < 0) return (-1); return (2); } int32_t parse_include(struct snmp_toolinfo *snmptoolctx, char *opt_arg) { char path[MAXPATHLEN + 1]; int32_t cut_dflt, len, subopt; struct asn_oid cut; char *val, *option; const char *const subopts[] = { "cut", "path", "file", NULL }; #define INC_CUT 0 #define INC_PATH 1 #define INC_LIST 2 assert(opt_arg != NULL); /* if (opt == 'i') free_filelist(snmptoolctx, ); */ /* * This function should be called only after getopt(3) - otherwise if * no previous validation of opt_arg strlen() may not return what is * expected. */ path[0] = '\0'; memset(&cut, 0, sizeof(struct asn_oid)); cut_dflt = -1; while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) { switch (subopt) { case INC_CUT: if (val == NULL) { warnx("Suboption 'cut' requires an argument"); return (-1); } else { if (snmp_parse_numoid(val, &cut) < 0) return (-1); } cut_dflt = 1; break; case INC_PATH: if ((len = parse_path(val)) < 0) return (-1); strlcpy(path, val, len + 1); break; case INC_LIST: if (val == NULL) return (-1); if (cut_dflt == -1) len = parse_flist(snmptoolctx, val, path, &IsoOrgDod_OID); else len = parse_flist(snmptoolctx, val, path, &cut); if (len < 0) return (-1); break; default: warnx("Unknown suboption - '%s'", suboptarg); return (-1); } } /* XXX: Fix me - returning two is wrong here */ return (2); } int32_t parse_server(char *opt_arg) { assert(opt_arg != NULL); if (snmp_parse_server(&snmp_client, opt_arg) < 0) return (-1); if (snmp_client.trans > SNMP_TRANS_UDP && snmp_client.chost == NULL) { if ((snmp_client.chost = malloc(strlen(SNMP_DEFAULT_LOCAL) + 1)) == NULL) { syslog(LOG_ERR, "malloc() failed: %s", strerror(errno)); return (-1); } strcpy(snmp_client.chost, SNMP_DEFAULT_LOCAL); } return (2); } int32_t parse_timeout(char *opt_arg) { int32_t v, saved_errno; assert(opt_arg != NULL); saved_errno = errno; errno = 0; v = strtol(opt_arg, NULL, 10); if (errno != 0) { warn("Error parsing timeout value"); errno = saved_errno; return (-1); } snmp_client.timeout.tv_sec = v; errno = saved_errno; return (2); } int32_t parse_retry(char *opt_arg) { uint32_t v; int32_t saved_errno; assert(opt_arg != NULL); saved_errno = errno; errno = 0; v = strtoul(opt_arg, NULL, 10); if (errno != 0) { warn("Error parsing retries count"); errno = saved_errno; return (-1); } snmp_client.retries = v; errno = saved_errno; return (2); } int32_t parse_version(char *opt_arg) { uint32_t v; int32_t saved_errno; assert(opt_arg != NULL); saved_errno = errno; errno = 0; v = strtoul(opt_arg, NULL, 10); if (errno != 0) { warn("Error parsing version"); errno = saved_errno; return (-1); } switch (v) { case 1: snmp_client.version = SNMP_V1; break; case 2: snmp_client.version = SNMP_V2c; break; case 3: snmp_client.version = SNMP_V3; break; default: warnx("Unsupported SNMP version - %u", v); errno = saved_errno; return (-1); } errno = saved_errno; return (2); } int32_t parse_local_path(char *opt_arg) { assert(opt_arg != NULL); if (sizeof(opt_arg) > sizeof(SNMP_LOCAL_PATH)) { warnx("Filename too long - %s", opt_arg); return (-1); } strlcpy(snmp_client.local_path, opt_arg, sizeof(SNMP_LOCAL_PATH)); return (2); } int32_t parse_buflen(char *opt_arg) { uint32_t size; int32_t saved_errno; assert(opt_arg != NULL); saved_errno = errno; errno = 0; size = strtoul(opt_arg, NULL, 10); if (errno != 0) { warn("Error parsing buffer size"); errno = saved_errno; return (-1); } if (size > MAX_BUFF_SIZE) { warnx("Buffer size too big - %d max allowed", MAX_BUFF_SIZE); errno = saved_errno; return (-1); } snmp_client.txbuflen = snmp_client.rxbuflen = size; errno = saved_errno; return (2); } int32_t parse_debug(void) { snmp_client.dump_pdus = 1; return (1); } int32_t parse_discovery(struct snmp_toolinfo *snmptoolctx) { SET_EDISCOVER(snmptoolctx); snmp_client.version = SNMP_V3; return (1); } int32_t parse_local_key(struct snmp_toolinfo *snmptoolctx) { SET_LOCALKEY(snmptoolctx); snmp_client.version = SNMP_V3; return (1); } int32_t parse_num_oids(struct snmp_toolinfo *snmptoolctx) { SET_NUMERIC(snmptoolctx); return (1); } int32_t parse_output(struct snmp_toolinfo *snmptoolctx, char *opt_arg) { assert(opt_arg != NULL); if (strlen(opt_arg) > strlen("verbose")) { warnx( "Invalid output option - %s",opt_arg); return (-1); } if (strncasecmp(opt_arg, "short", strlen(opt_arg)) == 0) SET_OUTPUT(snmptoolctx, OUTPUT_SHORT); else if (strncasecmp(opt_arg, "verbose", strlen(opt_arg)) == 0) SET_OUTPUT(snmptoolctx, OUTPUT_VERBOSE); else if (strncasecmp(opt_arg,"tabular", strlen(opt_arg)) == 0) SET_OUTPUT(snmptoolctx, OUTPUT_TABULAR); else if (strncasecmp(opt_arg, "quiet", strlen(opt_arg)) == 0) SET_OUTPUT(snmptoolctx, OUTPUT_QUIET); else { warnx( "Invalid output option - %s", opt_arg); return (-1); } return (2); } int32_t parse_errors(struct snmp_toolinfo *snmptoolctx) { SET_RETRY(snmptoolctx); return (1); } int32_t parse_skip_access(struct snmp_toolinfo *snmptoolctx) { SET_ERRIGNORE(snmptoolctx); return (1); } char * snmp_parse_suboid(char *str, struct asn_oid *oid) { char *endptr; asn_subid_t suboid; if (*str == '.') str++; if (*str < '0' || *str > '9') return (str); do { suboid = strtoul(str, &endptr, 10); if ((asn_subid_t) suboid > ASN_MAXID) { warnx("Suboid %u > ASN_MAXID", suboid); return (NULL); } if (snmp_suboid_append(oid, suboid) < 0) return (NULL); str = endptr + 1; } while (*endptr == '.'); return (endptr); } static char * snmp_int2asn_oid(char *str, struct asn_oid *oid) { char *endptr; int32_t v, saved_errno; saved_errno = errno; errno = 0; v = strtol(str, &endptr, 10); if (errno != 0) { warn("Integer value %s not supported", str); errno = saved_errno; return (NULL); } errno = saved_errno; if (snmp_suboid_append(oid, (asn_subid_t) v) < 0) return (NULL); return (endptr); } /* It is a bit weird to have a table indexed by OID but still... */ static char * snmp_oid2asn_oid(struct snmp_toolinfo *snmptoolctx, char *str, struct asn_oid *oid) { int32_t i; char string[MAXSTR + 1], *endptr; struct snmp_object obj; for (i = 0; i < MAXSTR; i++) if (isalpha (*(str + i)) == 0) break; endptr = str + i; memset(&obj, 0, sizeof(struct snmp_object)); if (i == 0) { if ((endptr = snmp_parse_suboid(str, &(obj.val.var))) == NULL) return (NULL); if (snmp_suboid_append(oid, (asn_subid_t) obj.val.var.len) < 0) return (NULL); } else { strlcpy(string, str, i + 1); if (snmp_lookup_enumoid(snmptoolctx, &obj, string) < 0) { warnx("Unknown string - %s", string); return (NULL); } } asn_append_oid(oid, &(obj.val.var)); return (endptr); } static char * snmp_ip2asn_oid(char *str, struct asn_oid *oid) { uint32_t v; int32_t i; char *endptr, *ptr; ptr = str; for (i = 0; i < 4; i++) { v = strtoul(ptr, &endptr, 10); if (v > 0xff) return (NULL); if (*endptr != '.' && strchr("],\0", *endptr) == NULL && i != 3) return (NULL); if (snmp_suboid_append(oid, (asn_subid_t) v) < 0) return (NULL); ptr = endptr + 1; } return (endptr); } /* 32-bit counter, gauge, timeticks. */ static char * snmp_uint2asn_oid(char *str, struct asn_oid *oid) { char *endptr; uint32_t v; int32_t saved_errno; saved_errno = errno; errno = 0; v = strtoul(str, &endptr, 10); if (errno != 0) { warn("Integer value %s not supported", str); errno = saved_errno; return (NULL); } errno = saved_errno; if (snmp_suboid_append(oid, (asn_subid_t) v) < 0) return (NULL); return (endptr); } static char * snmp_cnt64_2asn_oid(char *str, struct asn_oid *oid) { char *endptr; uint64_t v; int32_t saved_errno; saved_errno = errno; errno = 0; v = strtoull(str, &endptr, 10); if (errno != 0) { warn("Integer value %s not supported", str); errno = saved_errno; return (NULL); } errno = saved_errno; if (snmp_suboid_append(oid, (asn_subid_t) (v & 0xffffffff)) < 0) return (NULL); if (snmp_suboid_append(oid, (asn_subid_t) (v >> 32)) < 0) return (NULL); return (endptr); } enum snmp_syntax parse_syntax(char *str) { int32_t i; for (i = 0; i < SNMP_SYNTAX_UNKNOWN; i++) { if (strncmp(syntax_strings[i].str, str, strlen(syntax_strings[i].str)) == 0) return (syntax_strings[i].stx); } return (SNMP_SYNTAX_NULL); } static char * snmp_parse_subindex(struct snmp_toolinfo *snmptoolctx, char *str, struct index *idx, struct snmp_object *object) { char *ptr; int32_t i; enum snmp_syntax stx; char syntax[MAX_CMD_SYNTAX_LEN]; ptr = str; if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) { for (i = 0; i < MAX_CMD_SYNTAX_LEN ; i++) { if (*(ptr + i) == ':') break; } if (i >= MAX_CMD_SYNTAX_LEN) { warnx("Unknown syntax in OID - %s", str); return (NULL); } /* Expect a syntax string here. */ if ((stx = parse_syntax(str)) <= SNMP_SYNTAX_NULL) { warnx("Invalid syntax - %s",syntax); return (NULL); } if (stx != idx->syntax && !ISSET_ERRIGNORE(snmptoolctx)) { warnx("Syntax mismatch - %d expected, %d given", idx->syntax, stx); return (NULL); } /* * That is where the suboid started + the syntax length + one * character for ':'. */ ptr = str + i + 1; } else stx = idx->syntax; switch (stx) { case SNMP_SYNTAX_INTEGER: return (snmp_int2asn_oid(ptr, &(object->val.var))); case SNMP_SYNTAX_OID: return (snmp_oid2asn_oid(snmptoolctx, ptr, &(object->val.var))); case SNMP_SYNTAX_IPADDRESS: return (snmp_ip2asn_oid(ptr, &(object->val.var))); case SNMP_SYNTAX_COUNTER: /* FALLTHROUGH */ case SNMP_SYNTAX_GAUGE: /* FALLTHROUGH */ case SNMP_SYNTAX_TIMETICKS: return (snmp_uint2asn_oid(ptr, &(object->val.var))); case SNMP_SYNTAX_COUNTER64: return (snmp_cnt64_2asn_oid(ptr, &(object->val.var))); case SNMP_SYNTAX_OCTETSTRING: return (snmp_tc2oid(idx->tc, ptr, &(object->val.var))); default: /* NOTREACHED */ break; } return (NULL); } char * snmp_parse_index(struct snmp_toolinfo *snmptoolctx, char *str, struct snmp_object *object) { char *ptr; struct index *temp; if (object->info->table_idx == NULL) return (NULL); ptr = NULL; STAILQ_FOREACH(temp, &(OBJECT_IDX_LIST(object)), link) { if ((ptr = snmp_parse_subindex(snmptoolctx, str, temp, object)) == NULL) return (NULL); if (*ptr != ',' && *ptr != ']') return (NULL); str = ptr + 1; } if (ptr == NULL || *ptr != ']') { warnx("Mismatching index - %s", str); return (NULL); } return (ptr + 1); } /* * Fill in the struct asn_oid member of snmp_value with suboids from input. * If an error occurs - print message on stderr and return (-1). * If all is ok - return the length of the oid. */ int32_t snmp_parse_numoid(char *argv, struct asn_oid *var) { char *endptr, *str; asn_subid_t suboid; str = argv; if (*str == '.') str++; do { if (var->len == ASN_MAXOIDLEN) { warnx("Oid too long - %u", var->len); return (-1); } suboid = strtoul(str, &endptr, 10); if (suboid > ASN_MAXID) { warnx("Oid too long - %u", var->len); return (-1); } var->subs[var->len++] = suboid; str = endptr + 1; } while ( *endptr == '.'); if (*endptr != '\0') { warnx("Invalid oid string - %s", argv); return (-1); } return (var->len); } /* Append a length 1 suboid to an asn_oid structure. */ int32_t snmp_suboid_append(struct asn_oid *var, asn_subid_t suboid) { if (var == NULL) return (-1); if (var->len >= ASN_MAXOIDLEN) { warnx("Oid too long - %u", var->len); return (-1); } var->subs[var->len++] = suboid; return (1); } /* Pop the last suboid from an asn_oid structure. */ int32_t snmp_suboid_pop(struct asn_oid *var) { asn_subid_t suboid; if (var == NULL) return (-1); if (var->len < 1) return (-1); suboid = var->subs[--(var->len)]; var->subs[var->len] = 0; return (suboid); } /* * Parse the command-line provided string into an OID - allocate memory for a new * snmp object, fill in its fields and insert it in the object list. A * (snmp_verify_inoid_f) function must be provided to validate the input string. */ int32_t snmp_object_add(struct snmp_toolinfo *snmptoolctx, snmp_verify_inoid_f func, char *string) { struct snmp_object *obj; if (snmptoolctx == NULL) return (-1); /* XXX-BZ does that chack make sense? */ if (snmptoolctx->objects >= SNMP_MAX_BINDINGS) { warnx("Too many bindings in PDU - %u", snmptoolctx->objects + 1); return (-1); } if ((obj = calloc(1, sizeof(struct snmp_object))) == NULL) { syslog(LOG_ERR, "malloc() failed: %s", strerror(errno)); return (-1); } if (func(snmptoolctx, obj, string) < 0) { warnx("Invalid OID - %s", string); free(obj); return (-1); } snmptoolctx->objects++; SLIST_INSERT_HEAD(&snmptoolctx->snmp_objectlist, obj, link); return (1); } /* Given an OID, find it in the object list and remove it. */ int32_t snmp_object_remove(struct snmp_toolinfo *snmptoolctx, struct asn_oid *oid) { struct snmp_object *temp; if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist)) { warnx("Object list already empty"); return (-1); } SLIST_FOREACH(temp, &snmptoolctx->snmp_objectlist, link) if (asn_compare_oid(&(temp->val.var), oid) == 0) break; if (temp == NULL) { warnx("No such object in list"); return (-1); } SLIST_REMOVE(&snmptoolctx->snmp_objectlist, temp, snmp_object, link); if (temp->val.syntax == SNMP_SYNTAX_OCTETSTRING && temp->val.v.octetstring.octets != NULL) free(temp->val.v.octetstring.octets); free(temp); return (1); } static void snmp_object_freeall(struct snmp_toolinfo *snmptoolctx) { struct snmp_object *o; while ((o = SLIST_FIRST(&snmptoolctx->snmp_objectlist)) != NULL) { SLIST_REMOVE_HEAD(&snmptoolctx->snmp_objectlist, link); if (o->val.syntax == SNMP_SYNTAX_OCTETSTRING && o->val.v.octetstring.octets != NULL) free(o->val.v.octetstring.octets); free(o); } } /* Do all possible memory release before exit. */ void snmp_tool_freeall(struct snmp_toolinfo *snmptoolctx) { if (snmp_client.chost != NULL) { free(snmp_client.chost); snmp_client.chost = NULL; } if (snmp_client.cport != NULL) { free(snmp_client.cport); snmp_client.cport = NULL; } snmp_mapping_free(snmptoolctx); free_filelist(snmptoolctx); snmp_object_freeall(snmptoolctx); if (snmptoolctx->passwd != NULL) { free(snmptoolctx->passwd); snmptoolctx->passwd = NULL; } } /* * Fill all variables from the object list into a PDU. (snmp_verify_vbind_f) * function should check whether the variable is consistent in this PDU * (e.g do not add non-leaf OIDs to a GET PDU, or OIDs with read access only to * a SET PDU) - might be NULL though. (snmp_add_vbind_f) function is the * function actually adds the variable to the PDU and must not be NULL. */ int32_t snmp_pdu_add_bindings(struct snmp_toolinfo *snmptoolctx, snmp_verify_vbind_f vfunc, snmp_add_vbind_f afunc, struct snmp_pdu *pdu, int32_t maxcount) { int32_t nbindings, abind; struct snmp_object *obj; if (pdu == NULL || afunc == NULL) return (-1); /* Return 0 in case of no more work todo. */ if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist)) return (0); if (maxcount < 0 || maxcount > SNMP_MAX_BINDINGS) { warnx("maxcount out of range: <0 || >SNMP_MAX_BINDINGS"); return (-1); } nbindings = 0; SLIST_FOREACH(obj, &snmptoolctx->snmp_objectlist, link) { if ((vfunc != NULL) && (vfunc(snmptoolctx, pdu, obj) < 0)) { nbindings = -1; break; } if ((abind = afunc(pdu, obj)) < 0) { nbindings = -1; break; } if (abind > 0) { /* Do not put more varbindings than requested. */ if (++nbindings >= maxcount) break; } } return (nbindings); } /* * Locate an object in the object list and set a corresponding error status. */ int32_t snmp_object_seterror(struct snmp_toolinfo *snmptoolctx, struct snmp_value *err_value, int32_t error_status) { struct snmp_object *obj; if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist) || err_value == NULL) return (-1); SLIST_FOREACH(obj, &snmptoolctx->snmp_objectlist, link) if (asn_compare_oid(&(err_value->var), &(obj->val.var)) == 0) { obj->error = error_status; return (1); } return (0); } /* * Check a PDU received in response to a SNMP_PDU_GET/SNMP_PDU_GETBULK request * but don't compare syntaxes - when sending a request PDU they must be null. * This is a (almost) complete copy of snmp_pdu_check() - with matching syntaxes * checks and some other checks skipped. */ int32_t snmp_parse_get_resp(struct snmp_pdu *resp, struct snmp_pdu *req) { uint32_t i; for (i = 0; i < req->nbindings; i++) { if (asn_compare_oid(&req->bindings[i].var, &resp->bindings[i].var) != 0) { warnx("Bad OID in response"); return (-1); } if (snmp_client.version != SNMP_V1 && (resp->bindings[i].syntax == SNMP_SYNTAX_NOSUCHOBJECT || resp->bindings[i].syntax == SNMP_SYNTAX_NOSUCHINSTANCE)) return (0); } return (1); } int32_t snmp_parse_getbulk_resp(struct snmp_pdu *resp, struct snmp_pdu *req) { int32_t N, R, M, r; if (req->error_status > (int32_t) resp->nbindings) { warnx("Bad number of bindings in response"); return (-1); } for (N = 0; N < req->error_status; N++) { if (asn_is_suboid(&req->bindings[N].var, &resp->bindings[N].var) == 0) return (0); if (resp->bindings[N].syntax == SNMP_SYNTAX_ENDOFMIBVIEW) return (0); } for (R = N , r = N; R < (int32_t) req->nbindings; R++) { for (M = 0; M < req->error_index && (r + M) < (int32_t) resp->nbindings; M++) { if (asn_is_suboid(&req->bindings[R].var, &resp->bindings[r + M].var) == 0) return (0); if (resp->bindings[r + M].syntax == SNMP_SYNTAX_ENDOFMIBVIEW) { M++; break; } } r += M; } return (0); } int32_t snmp_parse_getnext_resp(struct snmp_pdu *resp, struct snmp_pdu *req) { uint32_t i; for (i = 0; i < req->nbindings; i++) { if (asn_is_suboid(&req->bindings[i].var, &resp->bindings[i].var) == 0) return (0); if (resp->version != SNMP_V1 && resp->bindings[i].syntax == SNMP_SYNTAX_ENDOFMIBVIEW) return (0); } return (1); } /* * Should be called to check a response to get/getnext/getbulk. */ int32_t snmp_parse_resp(struct snmp_pdu *resp, struct snmp_pdu *req) { if (resp == NULL || req == NULL) return (-2); if (resp->version != req->version) { warnx("Response has wrong version"); return (-1); } if (resp->error_status == SNMP_ERR_NOSUCHNAME) { warnx("Error - No Such Name"); return (0); } if (resp->error_status != SNMP_ERR_NOERROR) { warnx("Error %d in response", resp->error_status); return (-1); } if (resp->nbindings != req->nbindings && req->type != SNMP_PDU_GETBULK){ warnx("Bad number of bindings in response"); return (-1); } switch (req->type) { case SNMP_PDU_GET: return (snmp_parse_get_resp(resp,req)); case SNMP_PDU_GETBULK: return (snmp_parse_getbulk_resp(resp,req)); case SNMP_PDU_GETNEXT: return (snmp_parse_getnext_resp(resp,req)); default: /* NOTREACHED */ break; } return (-2); } static void snmp_output_octetstring(struct snmp_toolinfo *snmptoolctx, enum snmp_tc tc, uint32_t len, uint8_t *octets) { char *buf; if (len == 0 || octets == NULL) return; if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_OCTETSTRING].str); if ((buf = snmp_oct2tc(tc, len, (char *) octets)) != NULL) { fprintf(stdout, "%s", buf); free(buf); } } static void snmp_output_octetindex(struct snmp_toolinfo *snmptoolctx, enum snmp_tc tc, struct asn_oid *oid) { uint32_t i; uint8_t *s; if ((s = malloc(oid->subs[0] + 1)) == NULL) syslog(LOG_ERR, "malloc failed - %s", strerror(errno)); else { for (i = 0; i < oid->subs[0]; i++) s[i] = (u_char) (oid->subs[i + 1]); snmp_output_octetstring(snmptoolctx, tc, oid->subs[0], s); free(s); } } /* * Check and output syntax type and value. */ static void snmp_output_oid_value(struct snmp_toolinfo *snmptoolctx, struct asn_oid *oid) { char oid_string[ASN_OIDSTRLEN]; struct snmp_object obj; if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_OID].str); if(!ISSET_NUMERIC(snmptoolctx)) { memset(&obj, 0, sizeof(struct snmp_object)); asn_append_oid(&(obj.val.var), oid); if (snmp_lookup_enumstring(snmptoolctx, &obj) > 0) fprintf(stdout, "%s" , obj.info->string); else if (snmp_lookup_oidstring(snmptoolctx, &obj) > 0) fprintf(stdout, "%s" , obj.info->string); else if (snmp_lookup_nodestring(snmptoolctx, &obj) > 0) fprintf(stdout, "%s" , obj.info->string); else { (void) asn_oid2str_r(oid, oid_string); fprintf(stdout, "%s", oid_string); } } else { (void) asn_oid2str_r(oid, oid_string); fprintf(stdout, "%s", oid_string); } } static void snmp_output_int(struct snmp_toolinfo *snmptoolctx, struct enum_pairs *enums, int32_t int_val) { char *string; if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_INTEGER].str); if (enums != NULL && (string = enum_string_lookup(enums, int_val)) != NULL) fprintf(stdout, "%s", string); else fprintf(stdout, "%d", int_val); } static void snmp_output_ipaddress(struct snmp_toolinfo *snmptoolctx, uint8_t *ip) { if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_IPADDRESS].str); fprintf(stdout, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]); } static void snmp_output_counter(struct snmp_toolinfo *snmptoolctx, uint32_t counter) { if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_COUNTER].str); fprintf(stdout, "%u", counter); } static void snmp_output_gauge(struct snmp_toolinfo *snmptoolctx, uint32_t gauge) { if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_GAUGE].str); fprintf(stdout, "%u", gauge); } static void snmp_output_ticks(struct snmp_toolinfo *snmptoolctx, uint32_t ticks) { if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_TIMETICKS].str); fprintf(stdout, "%u", ticks); } static void snmp_output_counter64(struct snmp_toolinfo *snmptoolctx, uint64_t counter64) { if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_COUNTER64].str); fprintf(stdout,"%ju", counter64); } int32_t snmp_output_numval(struct snmp_toolinfo *snmptoolctx, struct snmp_value *val, struct snmp_oid2str *entry) { if (val == NULL) return (-1); if (GET_OUTPUT(snmptoolctx) != OUTPUT_QUIET) fprintf(stdout, " = "); switch (val->syntax) { case SNMP_SYNTAX_INTEGER: if (entry != NULL) snmp_output_int(snmptoolctx, entry->snmp_enum, val->v.integer); else snmp_output_int(snmptoolctx, NULL, val->v.integer); break; case SNMP_SYNTAX_OCTETSTRING: if (entry != NULL) snmp_output_octetstring(snmptoolctx, entry->tc, val->v.octetstring.len, val->v.octetstring.octets); else snmp_output_octetstring(snmptoolctx, SNMP_STRING, val->v.octetstring.len, val->v.octetstring.octets); break; case SNMP_SYNTAX_OID: snmp_output_oid_value(snmptoolctx, &(val->v.oid)); break; case SNMP_SYNTAX_IPADDRESS: snmp_output_ipaddress(snmptoolctx, val->v.ipaddress); break; case SNMP_SYNTAX_COUNTER: snmp_output_counter(snmptoolctx, val->v.uint32); break; case SNMP_SYNTAX_GAUGE: snmp_output_gauge(snmptoolctx, val->v.uint32); break; case SNMP_SYNTAX_TIMETICKS: snmp_output_ticks(snmptoolctx, val->v.uint32); break; case SNMP_SYNTAX_COUNTER64: snmp_output_counter64(snmptoolctx, val->v.counter64); break; case SNMP_SYNTAX_NOSUCHOBJECT: fprintf(stderr, "No Such Object\n"); return (val->syntax); case SNMP_SYNTAX_NOSUCHINSTANCE: fprintf(stderr, "No Such Instance\n"); return (val->syntax); case SNMP_SYNTAX_ENDOFMIBVIEW: fprintf(stdout, "End of Mib View\n"); return (val->syntax); case SNMP_SYNTAX_NULL: /* NOTREACHED */ fprintf(stderr, "agent returned NULL Syntax\n"); return (val->syntax); default: /* NOTREACHED - If here - then all went completely wrong. */ fprintf(stderr, "agent returned unknown syntax\n"); return (-1); } fprintf(stdout, "\n"); return (0); } static int32_t snmp_fill_object(struct snmp_toolinfo *snmptoolctx, struct snmp_object *obj, struct snmp_value *val) { int32_t rc; asn_subid_t suboid; if (obj == NULL || val == NULL) return (-1); if ((suboid = snmp_suboid_pop(&(val->var))) > ASN_MAXID) return (-1); memset(obj, 0, sizeof(struct snmp_object)); asn_append_oid(&(obj->val.var), &(val->var)); obj->val.syntax = val->syntax; if (obj->val.syntax > 0) rc = snmp_lookup_leafstring(snmptoolctx, obj); else rc = snmp_lookup_nonleaf_string(snmptoolctx, obj); (void) snmp_suboid_append(&(val->var), suboid); (void) snmp_suboid_append(&(obj->val.var), suboid); return (rc); } static int32_t snmp_output_index(struct snmp_toolinfo *snmptoolctx, struct index *stx, struct asn_oid *oid) { uint8_t ip[4]; uint32_t bytes = 1; uint64_t cnt64; struct asn_oid temp, out; if (oid->len < bytes) return (-1); memset(&temp, 0, sizeof(struct asn_oid)); asn_append_oid(&temp, oid); switch (stx->syntax) { case SNMP_SYNTAX_INTEGER: snmp_output_int(snmptoolctx, stx->snmp_enum, temp.subs[0]); break; case SNMP_SYNTAX_OCTETSTRING: if ((temp.subs[0] > temp.len -1 ) || (temp.subs[0] > ASN_MAXOCTETSTRING)) return (-1); snmp_output_octetindex(snmptoolctx, stx->tc, &temp); bytes += temp.subs[0]; break; case SNMP_SYNTAX_OID: if ((temp.subs[0] > temp.len -1) || (temp.subs[0] > ASN_MAXOIDLEN)) return (-1); bytes += temp.subs[0]; memset(&out, 0, sizeof(struct asn_oid)); asn_slice_oid(&out, &temp, 1, bytes); snmp_output_oid_value(snmptoolctx, &out); break; case SNMP_SYNTAX_IPADDRESS: if (temp.len < 4) return (-1); for (bytes = 0; bytes < 4; bytes++) ip[bytes] = temp.subs[bytes]; snmp_output_ipaddress(snmptoolctx, ip); bytes = 4; break; case SNMP_SYNTAX_COUNTER: snmp_output_counter(snmptoolctx, temp.subs[0]); break; case SNMP_SYNTAX_GAUGE: snmp_output_gauge(snmptoolctx, temp.subs[0]); break; case SNMP_SYNTAX_TIMETICKS: snmp_output_ticks(snmptoolctx, temp.subs[0]); break; case SNMP_SYNTAX_COUNTER64: if (oid->len < 2) return (-1); bytes = 2; memcpy(&cnt64, temp.subs, bytes); snmp_output_counter64(snmptoolctx, cnt64); break; default: return (-1); } return (bytes); } static int32_t snmp_output_object(struct snmp_toolinfo *snmptoolctx, struct snmp_object *o) { int32_t i, first, len; struct asn_oid oid; struct index *temp; if (ISSET_NUMERIC(snmptoolctx)) return (-1); if (o->info->table_idx == NULL) { fprintf(stdout,"%s.%d", o->info->string, o->val.var.subs[o->val.var.len - 1]); return (1); } fprintf(stdout,"%s[", o->info->string); memset(&oid, 0, sizeof(struct asn_oid)); len = 1; asn_slice_oid(&oid, &(o->val.var), (o->info->table_idx->var.len + len), o->val.var.len); first = 1; STAILQ_FOREACH(temp, &(OBJECT_IDX_LIST(o)), link) { if(first) first = 0; else fprintf(stdout, ", "); if ((i = snmp_output_index(snmptoolctx, temp, &oid)) < 0) break; len += i; memset(&oid, 0, sizeof(struct asn_oid)); asn_slice_oid(&oid, &(o->val.var), (o->info->table_idx->var.len + len), o->val.var.len + 1); } fprintf(stdout,"]"); return (1); } void snmp_output_err_resp(struct snmp_toolinfo *snmptoolctx, struct snmp_pdu *pdu) { struct snmp_object *object; char buf[ASN_OIDSTRLEN]; if (pdu == NULL || (pdu->error_index > (int32_t) pdu->nbindings)) { fprintf(stdout, "Invalid error index in PDU\n"); return; } if ((object = calloc(1, sizeof(struct snmp_object))) == NULL) { fprintf(stdout, "calloc: %s", strerror(errno)); return; } fprintf(stdout, "Agent %s:%s returned error \n", snmp_client.chost, snmp_client.cport); if (!ISSET_NUMERIC(snmptoolctx) && (snmp_fill_object(snmptoolctx, object, &(pdu->bindings[pdu->error_index - 1])) > 0)) snmp_output_object(snmptoolctx, object); else { asn_oid2str_r(&(pdu->bindings[pdu->error_index - 1].var), buf); fprintf(stdout,"%s", buf); } fprintf(stdout," caused error - "); if ((pdu->error_status > 0) && (pdu->error_status <= SNMP_ERR_INCONS_NAME)) fprintf(stdout, "%s\n", error_strings[pdu->error_status].str); else fprintf(stdout,"%s\n", error_strings[SNMP_ERR_UNKNOWN].str); free(object); object = NULL; } int32_t snmp_output_resp(struct snmp_toolinfo *snmptoolctx, struct snmp_pdu *pdu, struct asn_oid *root) { struct snmp_object *object; char p[ASN_OIDSTRLEN]; int32_t error; uint32_t i; if ((object = calloc(1, sizeof(struct snmp_object))) == NULL) return (-1); i = error = 0; while (i < pdu->nbindings) { if (root != NULL && !(asn_is_suboid(root, &(pdu->bindings[i].var)))) break; if (GET_OUTPUT(snmptoolctx) != OUTPUT_QUIET) { if (!ISSET_NUMERIC(snmptoolctx) && (snmp_fill_object(snmptoolctx, object, &(pdu->bindings[i])) > 0)) snmp_output_object(snmptoolctx, object); else { asn_oid2str_r(&(pdu->bindings[i].var), p); fprintf(stdout, "%s", p); } } error |= snmp_output_numval(snmptoolctx, &(pdu->bindings[i]), object->info); i++; } free(object); object = NULL; if (error) return (-1); return (i); } void snmp_output_engine(void) { uint32_t i; char *cptr, engine[2 * SNMP_ENGINE_ID_SIZ + 2]; cptr = engine; for (i = 0; i < snmp_client.engine.engine_len; i++) cptr += sprintf(cptr, "%.2x", snmp_client.engine.engine_id[i]); *cptr++ = '\0'; fprintf(stdout, "Engine ID 0x%s\n", engine); fprintf(stdout, "Boots : %u\t\tTime : %d\n", snmp_client.engine.engine_boots, snmp_client.engine.engine_time); } void snmp_output_keys(void) { uint32_t i, keylen = 0; char *cptr, extkey[2 * SNMP_AUTH_KEY_SIZ + 2]; fprintf(stdout, "Localized keys for %s\n", snmp_client.user.sec_name); if (snmp_client.user.auth_proto == SNMP_AUTH_HMAC_MD5) { fprintf(stdout, "MD5 : 0x"); keylen = SNMP_AUTH_HMACMD5_KEY_SIZ; } else if (snmp_client.user.auth_proto == SNMP_AUTH_HMAC_SHA) { fprintf(stdout, "SHA : 0x"); keylen = SNMP_AUTH_HMACSHA_KEY_SIZ; } if (snmp_client.user.auth_proto != SNMP_AUTH_NOAUTH) { cptr = extkey; for (i = 0; i < keylen; i++) cptr += sprintf(cptr, "%.2x", snmp_client.user.auth_key[i]); *cptr++ = '\0'; fprintf(stdout, "%s\n", extkey); } if (snmp_client.user.priv_proto == SNMP_PRIV_DES) { fprintf(stdout, "DES : 0x"); keylen = SNMP_PRIV_DES_KEY_SIZ; } else if (snmp_client.user.priv_proto == SNMP_PRIV_AES) { fprintf(stdout, "AES : 0x"); keylen = SNMP_PRIV_AES_KEY_SIZ; } if (snmp_client.user.priv_proto != SNMP_PRIV_NOPRIV) { cptr = extkey; for (i = 0; i < keylen; i++) cptr += sprintf(cptr, "%.2x", snmp_client.user.priv_key[i]); *cptr++ = '\0'; fprintf(stdout, "%s\n", extkey); } }