| /* |
| * snmpget.c - send snmp GET requests to a network entity. |
| * |
| */ |
| /*********************************************************************** |
| Copyright 1988, 1989, 1991, 1992 by Carnegie Mellon University |
| |
| All Rights Reserved |
| |
| Permission to use, copy, modify, and distribute this software and its |
| documentation for any purpose and without fee is hereby granted, |
| provided that the above copyright notice appear in all copies and that |
| both that copyright notice and this permission notice appear in |
| supporting documentation, and that the name of CMU not be |
| used in advertising or publicity pertaining to distribution of the |
| software without specific, written prior permission. |
| |
| CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING |
| ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL |
| CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR |
| ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
| WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
| ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
| SOFTWARE. |
| ******************************************************************/ |
| #include <net-snmp/net-snmp-config.h> |
| |
| #if HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #if HAVE_STRING_H |
| #include <string.h> |
| #else |
| #include <strings.h> |
| #endif |
| #include <sys/types.h> |
| #if HAVE_NETINET_IN_H |
| #include <netinet/in.h> |
| #endif |
| #include <stdio.h> |
| #include <ctype.h> |
| #if TIME_WITH_SYS_TIME |
| # include <sys/time.h> |
| # include <time.h> |
| #else |
| # if HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| # else |
| # include <time.h> |
| # endif |
| #endif |
| #if HAVE_SYS_SELECT_H |
| #include <sys/select.h> |
| #endif |
| #if HAVE_NETDB_H |
| #include <netdb.h> |
| #endif |
| #if HAVE_ARPA_INET_H |
| #include <arpa/inet.h> |
| #endif |
| |
| #include <net-snmp/utilities.h> |
| |
| #include <net-snmp/net-snmp-includes.h> |
| |
| #define NETSNMP_DS_APP_DONT_FIX_PDUS 0 |
| |
| static void |
| optProc(int argc, char *const *argv, int opt) |
| { |
| switch (opt) { |
| case 'C': |
| while (*optarg) { |
| switch (*optarg++) { |
| case 'f': |
| netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_APP_DONT_FIX_PDUS); |
| break; |
| default: |
| fprintf(stderr, "Unknown flag passed to -C: %c\n", |
| optarg[-1]); |
| exit(1); |
| } |
| } |
| break; |
| } |
| } |
| |
| void |
| usage(void) |
| { |
| fprintf(stderr, "USAGE: snmpget "); |
| snmp_parse_args_usage(stderr); |
| fprintf(stderr, " OID [OID]...\n\n"); |
| snmp_parse_args_descriptions(stderr); |
| fprintf(stderr, |
| " -C APPOPTS\t\tSet various application specific behaviours:\n"); |
| fprintf(stderr, |
| "\t\t\t f: do not fix errors and retry the request\n"); |
| } |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| netsnmp_session session, *ss; |
| netsnmp_pdu *pdu; |
| netsnmp_pdu *response; |
| netsnmp_variable_list *vars; |
| int arg; |
| int count; |
| int current_name = 0; |
| char *names[SNMP_MAX_CMDLINE_OIDS]; |
| oid name[MAX_OID_LEN]; |
| size_t name_length; |
| int status; |
| int failures = 0; |
| int exitval = 0; |
| |
| |
| /* |
| * get the common command line arguments |
| */ |
| switch (arg = snmp_parse_args(argc, argv, &session, "C:", optProc)) { |
| case NETSNMP_PARSE_ARGS_ERROR: |
| exit(1); |
| case NETSNMP_PARSE_ARGS_SUCCESS_EXIT: |
| exit(0); |
| case NETSNMP_PARSE_ARGS_ERROR_USAGE: |
| usage(); |
| exit(1); |
| default: |
| break; |
| } |
| |
| if (arg >= argc) { |
| fprintf(stderr, "Missing object name\n"); |
| usage(); |
| exit(1); |
| } |
| if ((argc - arg) > SNMP_MAX_CMDLINE_OIDS) { |
| fprintf(stderr, "Too many object identifiers specified. "); |
| fprintf(stderr, "Only %d allowed in one request.\n", SNMP_MAX_CMDLINE_OIDS); |
| usage(); |
| exit(1); |
| } |
| |
| /* |
| * get the object names |
| */ |
| for (; arg < argc; arg++) |
| names[current_name++] = argv[arg]; |
| |
| SOCK_STARTUP; |
| |
| |
| /* |
| * Open an SNMP session. |
| */ |
| ss = snmp_open(&session); |
| if (ss == NULL) { |
| /* |
| * diagnose snmp_open errors with the input netsnmp_session pointer |
| */ |
| snmp_sess_perror("snmpget", &session); |
| SOCK_CLEANUP; |
| exit(1); |
| } |
| |
| |
| /* |
| * Create PDU for GET request and add object names to request. |
| */ |
| pdu = snmp_pdu_create(SNMP_MSG_GET); |
| for (count = 0; count < current_name; count++) { |
| name_length = MAX_OID_LEN; |
| if (!snmp_parse_oid(names[count], name, &name_length)) { |
| snmp_perror(names[count]); |
| failures++; |
| } else |
| snmp_add_null_var(pdu, name, name_length); |
| } |
| if (failures) { |
| snmp_close(ss); |
| SOCK_CLEANUP; |
| exit(1); |
| } |
| |
| |
| /* |
| * Perform the request. |
| * |
| * If the Get Request fails, note the OID that caused the error, |
| * "fix" the PDU (removing the error-prone OID) and retry. |
| */ |
| retry: |
| status = snmp_synch_response(ss, pdu, &response); |
| if (status == STAT_SUCCESS) { |
| if (response->errstat == SNMP_ERR_NOERROR) { |
| for (vars = response->variables; vars; |
| vars = vars->next_variable) |
| print_variable(vars->name, vars->name_length, vars); |
| |
| } else { |
| fprintf(stderr, "Error in packet\nReason: %s\n", |
| snmp_errstring(response->errstat)); |
| |
| if (response->errindex != 0) { |
| fprintf(stderr, "Failed object: "); |
| for (count = 1, vars = response->variables; |
| vars && count != response->errindex; |
| vars = vars->next_variable, count++) |
| /*EMPTY*/; |
| if (vars) { |
| fprint_objid(stderr, vars->name, vars->name_length); |
| } |
| fprintf(stderr, "\n"); |
| } |
| exitval = 2; |
| |
| /* |
| * retry if the errored variable was successfully removed |
| */ |
| if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, |
| NETSNMP_DS_APP_DONT_FIX_PDUS)) { |
| pdu = snmp_fix_pdu(response, SNMP_MSG_GET); |
| snmp_free_pdu(response); |
| response = NULL; |
| if (pdu != NULL) { |
| goto retry; |
| } |
| } |
| } /* endif -- SNMP_ERR_NOERROR */ |
| |
| } else if (status == STAT_TIMEOUT) { |
| fprintf(stderr, "Timeout: No Response from %s.\n", |
| session.peername); |
| exitval = 1; |
| |
| } else { /* status == STAT_ERROR */ |
| snmp_sess_perror("snmpget", ss); |
| exitval = 1; |
| |
| } /* endif -- STAT_SUCCESS */ |
| |
| |
| if (response) |
| snmp_free_pdu(response); |
| snmp_close(ss); |
| SOCK_CLEANUP; |
| return exitval; |
| |
| } /* end main() */ |