1 files changed, 165 insertions, 51 deletions

diff --git a/plugins/check_snmp.c b/plugins/check_snmp.c
index afc568b..2acada2 100644
--- a/plugins/check_snmp.c
+++ b/plugins/check_snmp.c
@@ -1,31 +1,31 @@
 /*****************************************************************************
-* 
+*
 * Monitoring check_snmp plugin
-* 
+*
 * License: GPL
 * Copyright (c) 1999-2007 Monitoring Plugins Development Team
-* 
+*
 * Description:
-* 
+*
 * This file contains the check_snmp plugin
-* 
+*
 * Check status of remote machines and obtain system information via SNMP
-* 
-* 
+*
+*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
-* 
+*
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
-* 
+*
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
-* 
-* 
+*
+*
 *****************************************************************************/
 
 const char *progname = "check_snmp";
@@ -46,6 +46,7 @@ const char *email = "devel@monitoring-plugins.org";
 #define DEFAULT_PRIV_PROTOCOL "DES"
 #define DEFAULT_DELIMITER "="
 #define DEFAULT_OUTPUT_DELIMITER " "
+#define DEFAULT_BUFFER_SIZE 100
 
 #define mark(a) ((a)!=0?"*":"")
 
@@ -64,6 +65,7 @@ const char *email = "devel@monitoring-plugins.org";
 #define L_RATE_MULTIPLIER CHAR_MAX+2
 #define L_INVERT_SEARCH CHAR_MAX+3
 #define L_OFFSET CHAR_MAX+4
+#define L_IGNORE_MIB_PARSING_ERRORS CHAR_MAX+5
 
 /* Gobble to string - stop incrementing c when c[0] match one of the
  * characters in s */
@@ -90,6 +92,7 @@ char *thisarg (char *str);
 char *nextarg (char *str);
 void print_usage (void);
 void print_help (void);
+char *multiply (char *str);
 
 #include "regex.h"
 char regex_expect[MAX_INPUT_BUFFER] = "";
@@ -113,6 +116,7 @@ char *authproto = NULL;
 char *privproto = NULL;
 char *authpasswd = NULL;
 char *privpasswd = NULL;
+int nulloid = STATE_UNKNOWN;
 char **oids = NULL;
 size_t oids_size = 0;
 char *label;
@@ -153,6 +157,10 @@ double *previous_value;
 size_t previous_size = OID_COUNT_STEP;
 int perf_labels = 1;
 char* ip_version = "";
+double multiplier = 1.0;
+char *fmtstr = "";
+char buffer[DEFAULT_BUFFER_SIZE];
+bool ignore_mib_parsing_errors = false;
 
 static char *fix_snmp_range(char *th)
 {
@@ -300,42 +308,55 @@ main (int argc, char **argv)
         }
 
         /* 10 arguments to pass before context and authpriv options + 1 for host and numoids. Add one for terminating NULL */
-        command_line = calloc (10 + numcontext + numauthpriv + 1 + numoids + 1, sizeof (char *));
-        command_line[0] = snmpcmd;
-        command_line[1] = strdup ("-Le");
-        command_line[2] = strdup ("-t");
-        xasprintf (&command_line[3], "%d", timeout_interval);
-        command_line[4] = strdup ("-r");
-        xasprintf (&command_line[5], "%d", retries);
-        command_line[6] = strdup ("-m");
-        command_line[7] = strdup (miblist);
-        command_line[8] = "-v";
-        command_line[9] = strdup (proto);
+
+        unsigned index = 0;
+        command_line = calloc (11 + numcontext + numauthpriv + 1 + numoids + 1, sizeof (char *));
+
+        command_line[index++] = snmpcmd;
+        command_line[index++] = strdup ("-Le");
+        command_line[index++] = strdup ("-t");
+        xasprintf (&command_line[index++], "%d", timeout_interval);
+        command_line[index++] = strdup ("-r");
+        xasprintf (&command_line[index++], "%d", retries);
+        command_line[index++] = strdup ("-m");
+        command_line[index++] = strdup (miblist);
+        command_line[index++] = "-v";
+        command_line[index++] = strdup (proto);
+
+        xasprintf(&cl_hidden_auth, "%s -Le -t %d -r %d -m %s -v %s",
+                snmpcmd, timeout_interval, retries, strlen(miblist) ? miblist : "''", proto);
+
+        if (ignore_mib_parsing_errors) {
+                command_line[index++] = "-Pe";
+                xasprintf(&cl_hidden_auth, "%s -Pe", cl_hidden_auth);
+        }
+
 
         for (i = 0; i < numcontext; i++) {
-                command_line[10 + i] = contextargs[i];
+                command_line[index++] = contextargs[i];
         }
-        
+
         for (i = 0; i < numauthpriv; i++) {
-                command_line[10 + numcontext + i] = authpriv[i];
+                command_line[index++] = authpriv[i];
         }
 
-        xasprintf (&command_line[10 + numcontext + numauthpriv], "%s:%s", server_address, port);
+        xasprintf (&command_line[index++], "%s:%s", server_address, port);
 
-        /* This is just for display purposes, so it can remain a string */
-        xasprintf(&cl_hidden_auth, "%s -Le -t %d -r %d -m %s -v %s %s %s %s:%s",
-                snmpcmd, timeout_interval, retries, strlen(miblist) ? miblist : "''", proto, "[context]", "[authpriv]",
-                server_address, port);
+        xasprintf(&cl_hidden_auth, "%s [context] [authpriv] %s:%s",
+         cl_hidden_auth,
+         server_address,
+         port);
 
         for (i = 0; i < numoids; i++) {
-                command_line[10 + numcontext + numauthpriv + 1 + i] = oids[i];
-                xasprintf(&cl_hidden_auth, "%s %s", cl_hidden_auth, oids[i]);   
+                command_line[index++] = oids[i];
+                xasprintf(&cl_hidden_auth, "%s %s", cl_hidden_auth, oids[i]);
         }
 
-        command_line[10 + numcontext + numauthpriv + 1 + numoids] = NULL;
+        command_line[index++] = NULL;
 
-        if (verbose)
+        if (verbose) {
                 printf ("%s\n", cl_hidden_auth);
+        }
 
         /* Set signal handling and alarm */
         if (signal (SIGALRM, runcmd_timeout_alarm_handler) == SIG_ERR) {
@@ -375,7 +396,7 @@ main (int argc, char **argv)
                 }
         }
 
-        for (line=0, i=0; line < chld_out.lines; line++, i++) {
+        for (line=0, i=0; line < chld_out.lines && i < numoids ; line++, i++) {
                 if(calculate_rate)
                         conv = "%.10g";
                 else
@@ -397,15 +418,15 @@ main (int argc, char **argv)
                 is_counter=0;
                 /* We strip out the datatype indicator for PHBs */
                 if (strstr (response, "Gauge: ")) {
-                        show = strstr (response, "Gauge: ") + 7;
-                } 
+                        show = multiply (strstr (response, "Gauge: ") + 7);
+                }
                 else if (strstr (response, "Gauge32: ")) {
-                        show = strstr (response, "Gauge32: ") + 9;
-                } 
+                        show = multiply (strstr (response, "Gauge32: ") + 9);
+                }
                 else if (strstr (response, "Counter32: ")) {
                         show = strstr (response, "Counter32: ") + 11;
                         is_counter=1;
-                        if(!calculate_rate) 
+                        if(!calculate_rate)
                                 strcpy(type, "c");
                 }
                 else if (strstr (response, "Counter64: ")) {
@@ -415,7 +436,10 @@ main (int argc, char **argv)
                                 strcpy(type, "c");
                 }
                 else if (strstr (response, "INTEGER: ")) {
-                        show = strstr (response, "INTEGER: ") + 9;
+                        show = multiply (strstr (response, "INTEGER: ") + 9);
+                        if (fmtstr != "") {
+                                conv = fmtstr;
+                        }
                 }
                 else if (strstr (response, "OID: ")) {
                         show = strstr (response, "OID: ") + 5;
@@ -468,9 +492,20 @@ main (int argc, char **argv)
                 /* Process this block for numeric comparisons */
                 /* Make some special values,like Timeticks numeric only if a threshold is defined */
                 if (thlds[i]->warning || thlds[i]->critical || calculate_rate) {
+                        if (verbose > 2) {
+                                print_thresholds("  thresholds", thlds[i]);
+                        }
                         ptr = strpbrk (show, "-0123456789");
-                        if (ptr == NULL)
-                                die (STATE_UNKNOWN,_("No valid data returned (%s)\n"), show);
+                        if (ptr == NULL){
+                                if (nulloid == 3)
+                                        die (STATE_UNKNOWN,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 0)
+                                        die (STATE_OK,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 1)
+                                        die (STATE_WARNING,_("No valid data returned (%s)\n"), show);
+                                else if (nulloid == 2)
+                                        die (STATE_CRITICAL,_("No valid data returned (%s)\n"), show);
+                        }
                         while (i >= response_size) {
                                 response_size += OID_COUNT_STEP;
                                 response_value = realloc(response_value, response_size * sizeof(*response_value));
@@ -581,14 +616,16 @@ main (int argc, char **argv)
 
                         if (warning_thresholds) {
                                 strncat(perfstr, ";", sizeof(perfstr)-strlen(perfstr)-1);
-                                strncat(perfstr, warning_thresholds, sizeof(perfstr)-strlen(perfstr)-1);
+                                if(thlds[i]->warning && thlds[i]->warning->text)
+                                        strncat(perfstr, thlds[i]->warning->text, sizeof(perfstr)-strlen(perfstr)-1);
                         }
 
                         if (critical_thresholds) {
                                 if (!warning_thresholds)
                                         strncat(perfstr, ";", sizeof(perfstr)-strlen(perfstr)-1);
                                 strncat(perfstr, ";", sizeof(perfstr)-strlen(perfstr)-1);
-                                strncat(perfstr, critical_thresholds, sizeof(perfstr)-strlen(perfstr)-1);
+                                if(thlds[i]->critical && thlds[i]->critical->text)
+                                        strncat(perfstr, thlds[i]->critical->text, sizeof(perfstr)-strlen(perfstr)-1);
                         }
 
                         strncat(perfstr, " ", sizeof(perfstr)-strlen(perfstr)-1);
@@ -602,7 +639,7 @@ main (int argc, char **argv)
                 state_string=malloc(string_length);
                 if(state_string==NULL)
                         die(STATE_UNKNOWN, _("Cannot malloc"));
-                
+
                 current_length=0;
                 for(i=0; i<total_oids; i++) {
                         xasprintf(&temp_string,"%.0f",response_value[i]);
@@ -624,7 +661,7 @@ main (int argc, char **argv)
                 state_string[--current_length]='\0';
                 if (verbose > 2)
                         printf("State string=%s\n",state_string);
-                
+
                 /* This is not strictly the same as time now, but any subtle variations will cancel out */
                 np_state_write_string(current_time, state_string );
                 if(previous_state==NULL) {
@@ -656,6 +693,7 @@ process_arguments (int argc, char **argv)
                 {"oid", required_argument, 0, 'o'},
                 {"object", required_argument, 0, 'o'},
                 {"delimiter", required_argument, 0, 'd'},
+                {"nulloid", required_argument, 0, 'z'},
                 {"output-delimiter", required_argument, 0, 'D'},
                 {"string", required_argument, 0, 's'},
                 {"timeout", required_argument, 0, 't'},
@@ -683,6 +721,9 @@ process_arguments (int argc, char **argv)
                 {"perf-oids", no_argument, 0, 'O'},
                 {"ipv4", no_argument, 0, '4'},
                 {"ipv6", no_argument, 0, '6'},
+                {"multiplier", required_argument, 0, 'M'},
+                {"fmtstr", required_argument, 0, 'f'},
+                {"ignore-mib-parsing-errors", no_argument, false, L_IGNORE_MIB_PARSING_ERRORS},
                 {0, 0, 0, 0}
         };
 
@@ -700,7 +741,7 @@ process_arguments (int argc, char **argv)
         }
 
         while (1) {
-                c = getopt_long (argc, argv, "nhvVO46t:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:",
+                c = getopt_long (argc, argv, "nhvVO46t:c:w:H:C:o:e:E:d:D:s:t:R:r:l:u:p:m:P:N:L:U:a:x:A:X:M:f:z:",
                                                                          longopts, &option);
 
                 if (c == -1 || c == EOF)
@@ -811,6 +852,12 @@ process_arguments (int argc, char **argv)
                                         eval_method[j+1] |= CRIT_PRESENT;
                         }
                         break;
+                case 'z':       /* Null OID Return Check */
+                        if (!is_integer (optarg))
+                                usage2 (_("Exit status must be a positive integer"), optarg);
+                        else
+                                nulloid = atoi(optarg);
+                        break;
                 case 's':                                                                       /* string or substring */
                         strncpy (string_value, optarg, sizeof (string_value) - 1);
                         string_value[sizeof (string_value) - 1] = 0;
@@ -824,6 +871,7 @@ process_arguments (int argc, char **argv)
                         break;
                 case 'R':                                                                       /* regex */
                         cflags = REG_ICASE;
+                        // fall through
                 case 'r':                                                                       /* regex */
                         cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
                         strncpy (regex_expect, optarg, sizeof (regex_expect) - 1);
@@ -932,6 +980,18 @@ process_arguments (int argc, char **argv)
                         if(verbose>2)
                                 printf("IPv6 detected! Will pass \"udp6:\" to snmpget.\n");
                         break;
+                case 'M':
+                        if ( strspn( optarg, "0123456789.," ) == strlen( optarg ) ) {
+                                multiplier=strtod(optarg,NULL);
+                        }
+                        break;
+                case 'f':
+                        if (multiplier != 1.0) {
+                                fmtstr=optarg;
+                        }
+                        break;
+                case L_IGNORE_MIB_PARSING_ERRORS:
+                        ignore_mib_parsing_errors = true;
                 }
         }
 
@@ -1001,7 +1061,7 @@ validate_arguments ()
                         contextargs[0] = strdup ("-n");
                         contextargs[1] = strdup (context);
                 }
-                
+
                 if (seclevel == NULL)
                         xasprintf(&seclevel, "noAuthNoPriv");
 
@@ -1122,6 +1182,44 @@ nextarg (char *str)
 
 
 
+/* multiply result (values 0 < n < 1 work as divider) */
+char *
+multiply (char *str)
+{
+        char *endptr;
+        double val;
+        char *conv = "%f";
+
+        if(multiplier == 1)
+                return(str);
+
+        if(verbose>2)
+                printf("    multiply input: %s\n", str);
+
+        val = strtod (str, &endptr);
+        if ((val == 0.0) && (endptr == str)) {
+                die(STATE_UNKNOWN, _("multiplier set (%.1f), but input is not a number: %s"), multiplier, str);
+        }
+
+        if(verbose>2)
+                printf("    multiply extracted double: %f\n", val);
+        val *= multiplier;
+        if (fmtstr != "") {
+                conv = fmtstr;
+        }
+        if (val == (int)val) {
+                snprintf(buffer, DEFAULT_BUFFER_SIZE, "%.0f", val);
+        } else {
+                if(verbose>2)
+                        printf("    multiply using format: %s\n", conv);
+                snprintf(buffer, DEFAULT_BUFFER_SIZE, conv, val);
+        }
+        if(verbose>2)
+                printf("    multiply result: %s\n", buffer);
+        return buffer;
+}
+
+
 void
 print_help (void)
 {
@@ -1161,7 +1259,7 @@ print_help (void)
         printf ("(%s \"%s\")\n", _("default is") ,DEFAULT_COMMUNITY);
         printf (" %s\n", "-U, --secname=USERNAME");
         printf ("    %s\n", _("SNMPv3 username"));
-        printf (" %s\n", "-A, --authpassword=PASSWORD");
+        printf (" %s\n", "-A, --authpasswd=PASSWORD");
         printf ("    %s\n", _("SNMPv3 authentication password"));
         printf (" %s\n", "-X, --privpasswd=PASSWORD");
         printf ("    %s\n", _("SNMPv3 privacy password"));
@@ -1176,6 +1274,14 @@ print_help (void)
         printf ("    %s \"%s\"\n", _("Delimiter to use when parsing returned data. Default is"), DEFAULT_DELIMITER);
         printf ("    %s\n", _("Any data on the right hand side of the delimiter is considered"));
         printf ("    %s\n", _("to be the data that should be used in the evaluation."));
+        printf (" %s\n", "-z, --nulloid=#");
+        printf ("    %s\n", _("If the check returns a 0 length string or NULL value"));
+        printf ("    %s\n", _("This option allows you to choose what status you want it to exit"));
+        printf ("    %s\n", _("Excluding this option renders the default exit of 3(STATE_UNKNOWN)"));
+        printf ("    %s\n", _("0 = OK"));
+        printf ("    %s\n", _("1 = WARNING"));
+        printf ("    %s\n", _("2 = CRITICAL"));
+        printf ("    %s\n", _("3 = UNKNOWN"));
 
         /* Tests Against Integers */
         printf (" %s\n", "-w, --warning=THRESHOLD(s)");
@@ -1187,7 +1293,7 @@ print_help (void)
         printf (" %s\n", "--rate-multiplier");
         printf ("    %s\n", _("Converts rate per second. For example, set to 60 to convert to per minute"));
         printf (" %s\n", "--offset=OFFSET");
-        printf ("    %s\n", _("Add/substract the specified OFFSET to numeric sensor data"));
+        printf ("    %s\n", _("Add/subtract the specified OFFSET to numeric sensor data"));
 
         /* Tests Against Strings */
         printf (" %s\n", "-s, --string=STRING");
@@ -1206,6 +1312,10 @@ print_help (void)
         printf ("    %s\n", _("Units label(s) for output data (e.g., 'sec.')."));
         printf (" %s\n", "-D, --output-delimiter=STRING");
         printf ("    %s\n", _("Separates output on multiple OID requests"));
+        printf (" %s\n", "-M, --multiplier=FLOAT");
+        printf ("    %s\n", _("Multiplies current value, 0 < n < 1 works as divider, defaults to 1"));
+        printf (" %s\n", "-f, --fmtstr=STRING");
+        printf ("    %s\n", _("C-style format string for float values (see option -M)"));
 
         printf (UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
         printf ("    %s\n", _("NOTE the final timeout value is calculated using this formula: timeout_interval * retries + 5"));
@@ -1215,6 +1325,9 @@ print_help (void)
         printf (" %s\n", "-O, --perf-oids");
         printf ("    %s\n", _("Label performance data with OIDs instead of --label's"));
 
+        printf (" %s\n", "--ignore-mib-parsing-errors");
+        printf ("    %s\n", _("Tell snmpget to not print errors encountered when parsing MIB files"));
+
         printf (UT_VERBOSE);
 
         printf ("\n");
@@ -1258,4 +1371,5 @@ print_usage (void)
         printf ("[-l label] [-u units] [-p port-number] [-d delimiter] [-D output-delimiter]\n");
         printf ("[-m miblist] [-P snmp version] [-N context] [-L seclevel] [-U secname]\n");
         printf ("[-a authproto] [-A authpasswd] [-x privproto] [-X privpasswd] [-4|6]\n");
+        printf ("[-M multiplier [-f format]]\n");
 }