702 lines
17 KiB
C
702 lines
17 KiB
C
/*
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* Portions of this file are subject to the following copyright(s). See
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* the Net-SNMP's COPYING file for more details and other copyrights
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* that may apply:
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*
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* Portions of this file are copyrighted by:
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* Copyright (c) 2016 VMware, Inc. All rights reserved.
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* Use is subject to license terms specified in the COPYING file
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* distributed with the Net-SNMP package.
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*/
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#include <net-snmp/net-snmp-config.h>
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#define SYSLOG_NAMES
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#include <limits.h>
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#include <stdio.h>
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#ifndef HAVE_PRIORITYNAMES
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#include <errno.h>
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#endif
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#if HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#else
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#include <strings.h>
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#endif
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#include <sys/types.h>
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#if HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#include <stdarg.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_DMALLOC_H
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#include <dmalloc.h>
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#endif
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#ifdef HAVE_PRIORITYNAMES
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#include <sys/syslog.h>
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#endif
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#include <net-snmp/types.h>
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#include <net-snmp/output_api.h>
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#include <net-snmp/library/snmp_debug.h> /* For this file's "internal" definitions */
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#include <net-snmp/config_api.h>
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#include <net-snmp/utilities.h>
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#include <net-snmp/library/mib.h>
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#include <net-snmp/library/snmp_api.h>
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#include <net-snmp/library/snmp_assert.h>
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#define SNMP_DEBUG_DISABLED 0
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#define SNMP_DEBUG_ACTIVE 1
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#define SNMP_DEBUG_EXCLUDED 2
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#ifndef NETSNMP_NO_DEBUGGING
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static int dodebug = NETSNMP_ALWAYS_DEBUG;
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int debug_num_tokens = 0;
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static int debug_print_everything = 0;
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#ifndef NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL
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static int debug_log_level = LOG_DEBUG;
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#else
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#define debug_log_level LOG_DEBUG
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#endif /* NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL */
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netsnmp_token_descr dbg_tokens[MAX_DEBUG_TOKENS];
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/*
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* Number of spaces to indent debug output. Valid range is [0,INT_MAX]
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*/
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static int debugindent = 0;
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int
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debug_indent_get(void)
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{
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return debugindent;
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}
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const char*
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debug_indent(void)
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{
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#define SPACES " " \
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" "
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if ((sizeof(SPACES) - 1) < (unsigned int)debugindent) {
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snmp_log(LOG_ERR, "Too deep indentation for debug_indent. "
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"Consider using \"%%*s\", debug_indent_get(), \"\" instead.");
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return SPACES;
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}
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return SPACES + sizeof(SPACES) - 1 - debugindent;
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#undef SPACES
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}
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void
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debug_indent_add(int amount)
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{
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if (-debugindent <= amount && amount <= INT_MAX - debugindent)
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debugindent += amount;
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netsnmp_assert( debugindent >= 0 ); /* no negative indents */
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}
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NETSNMP_IMPORT void
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debug_config_register_tokens(const char *configtoken, char *tokens);
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void
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debug_indent_reset(void)
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{
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if (debugindent != 0)
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DEBUGMSGTL(("dump_indent","indent reset from %d\n", debugindent));
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debugindent = 0;
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}
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void
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debug_config_register_tokens(const char *configtoken, char *tokens)
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{
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debug_register_tokens(tokens);
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}
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NETSNMP_IMPORT void
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debug_config_turn_on_debugging(const char *configtoken, char *line);
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void
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debug_config_turn_on_debugging(const char *configtoken, char *line)
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{
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snmp_set_do_debugging(atoi(line));
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}
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#ifndef NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL
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void
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netsnmp_set_debug_log_level(int val)
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{
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if (val < LOG_EMERG)
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val = LOG_EMERG;
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else if (val > LOG_DEBUG)
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val = LOG_DEBUG;
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debug_log_level = val;
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}
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int
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netsnmp_get_debug_log_level(void)
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{
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return debug_log_level;
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}
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static void
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debug_config_debug_log_level(const char *configtoken, char *line)
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{
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#if !HAVE_PRIORITYNAMES
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static const struct strval_s {
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const char *c_name;
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int c_val;
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} prioritynames[] = {
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{ "alert", LOG_ALERT },
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{ "crit", LOG_CRIT },
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{ "debug", LOG_DEBUG },
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{ "emerg", LOG_EMERG },
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{ "err", LOG_ERR },
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{ "info", LOG_INFO },
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{ "notice", LOG_NOTICE },
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{ "warning", LOG_WARNING },
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{ NULL, 0 }
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};
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#endif
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int i = 0, len_l, len_p;
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len_l = strlen(line);
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for(;prioritynames[i].c_name;++i) {
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len_p = strlen(prioritynames[i].c_name);
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if ((len_p != len_l) ||
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(strcasecmp(line,prioritynames[i].c_name) != 0))
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continue;
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netsnmp_set_debug_log_level(prioritynames[i].c_val);
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return;
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}
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config_perror("unknown debug log level, using debug");
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netsnmp_set_debug_log_level(LOG_DEBUG);
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}
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#endif /* NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL */
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void
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debug_register_tokens(const char *tokens)
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{
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char *newp, *cp;
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char *st = NULL;
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int status;
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if (tokens == NULL || *tokens == 0)
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return;
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newp = strdup(tokens); /* strtok_r messes it up */
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if (!newp)
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return;
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cp = strtok_r(newp, DEBUG_TOKEN_DELIMITER, &st);
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while (cp) {
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if (strlen(cp) < MAX_DEBUG_TOKEN_LEN) {
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if (strcasecmp(cp, DEBUG_ALWAYS_TOKEN) == 0) {
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debug_print_everything = 1;
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} else if (debug_num_tokens < MAX_DEBUG_TOKENS) {
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if ('-' == *cp) {
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++cp;
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status = SNMP_DEBUG_EXCLUDED;
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}
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else
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status = SNMP_DEBUG_ACTIVE;
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dbg_tokens[debug_num_tokens].token_name = strdup(cp);
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dbg_tokens[debug_num_tokens++].enabled = status;
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snmp_log(LOG_NOTICE, "registered debug token %s, %d\n", cp, status);
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} else {
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snmp_log(LOG_NOTICE, "Unable to register debug token %s\n", cp);
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}
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} else {
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snmp_log(LOG_NOTICE, "Debug token %s over length\n", cp);
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}
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cp = strtok_r(NULL, DEBUG_TOKEN_DELIMITER, &st);
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}
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free(newp);
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}
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/*
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* Print all registered tokens along with their current status
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*/
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void
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debug_print_registered_tokens(void) {
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int i;
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snmp_log(LOG_INFO, "%d tokens registered :\n", debug_num_tokens);
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for (i=0; i<debug_num_tokens; i++) {
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snmp_log( LOG_INFO, "%d) %s : %d\n",
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i, dbg_tokens [i].token_name, dbg_tokens [i].enabled);
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}
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}
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/*
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* Enable logs on a given token
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*/
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int
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debug_enable_token_logs (const char *token) {
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int i;
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/* debugging flag is on or off */
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if (!dodebug)
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return SNMPERR_GENERR;
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if (debug_num_tokens == 0 || debug_print_everything) {
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/* no tokens specified, print everything */
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return SNMPERR_SUCCESS;
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} else {
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for(i=0; i < debug_num_tokens; i++) {
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if (dbg_tokens[i].token_name &&
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strncmp(dbg_tokens[i].token_name, token,
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strlen(dbg_tokens[i].token_name)) == 0) {
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dbg_tokens[i].enabled = SNMP_DEBUG_ACTIVE;
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return SNMPERR_SUCCESS;
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}
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}
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}
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return SNMPERR_GENERR;
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}
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/*
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* Diable logs on a given token
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*/
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int
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debug_disable_token_logs (const char *token) {
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int i;
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/* debugging flag is on or off */
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if (!dodebug)
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return SNMPERR_GENERR;
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if (debug_num_tokens == 0 || debug_print_everything) {
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/* no tokens specified, print everything */
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return SNMPERR_SUCCESS;
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} else {
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for(i=0; i < debug_num_tokens; i++) {
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if (strncmp(dbg_tokens[i].token_name, token,
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strlen(dbg_tokens[i].token_name)) == 0) {
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dbg_tokens[i].enabled = SNMP_DEBUG_DISABLED;
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return SNMPERR_SUCCESS;
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}
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}
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}
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return SNMPERR_GENERR;
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}
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/*
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* debug_is_token_registered(char *TOKEN):
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*
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* returns SNMPERR_SUCCESS
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* or SNMPERR_GENERR
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*
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* if TOKEN has been registered and debugging support is turned on.
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*/
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int
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debug_is_token_registered(const char *token)
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{
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int i, rc;
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/*
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* debugging flag is on or off
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*/
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if (!dodebug)
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return SNMPERR_GENERR;
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if (debug_num_tokens == 0 || debug_print_everything) {
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/*
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* no tokens specified, print everything
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*/
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return SNMPERR_SUCCESS;
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}
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else
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rc = SNMPERR_GENERR; /* ! found = err */
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for (i = 0; i < debug_num_tokens; i++) {
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if (SNMP_DEBUG_DISABLED == dbg_tokens[i].enabled)
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continue;
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if (dbg_tokens[i].token_name &&
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strncmp(dbg_tokens[i].token_name, token,
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strlen(dbg_tokens[i].token_name)) == 0) {
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if (SNMP_DEBUG_ACTIVE == dbg_tokens[i].enabled)
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return SNMPERR_SUCCESS; /* active */
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else
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return SNMPERR_GENERR; /* excluded */
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}
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}
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return rc;
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}
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void
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debugmsg(const char *token, const char *format, ...)
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{
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if (debug_is_token_registered(token) == SNMPERR_SUCCESS) {
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va_list debugargs;
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va_start(debugargs, format);
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snmp_vlog(debug_log_level, format, debugargs);
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va_end(debugargs);
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}
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}
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void
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debugmsg_oid(const char *token, const oid * theoid, size_t len)
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{
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u_char *buf = NULL;
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size_t buf_len = 0, out_len = 0;
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if (sprint_realloc_objid(&buf, &buf_len, &out_len, 1, theoid, len)) {
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if (buf != NULL) {
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debugmsg(token, "%s", buf);
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}
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} else {
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if (buf != NULL) {
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debugmsg(token, "%s [TRUNCATED]", buf);
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}
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}
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if (buf != NULL) {
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free(buf);
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}
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}
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void
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debugmsg_suboid(const char *token, const oid * theoid, size_t len)
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{
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u_char *buf = NULL;
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size_t buf_len = 0, out_len = 0;
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int buf_overflow = 0;
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netsnmp_sprint_realloc_objid(&buf, &buf_len, &out_len, 1,
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&buf_overflow, theoid, len);
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if(buf_overflow) {
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if (buf != NULL) {
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debugmsg(token, "%s [TRUNCATED]", buf);
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}
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} else {
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if (buf != NULL) {
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debugmsg(token, "%s", buf);
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}
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}
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if (buf != NULL) {
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free(buf);
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}
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}
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void
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debugmsg_var(const char *token, netsnmp_variable_list * var)
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{
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u_char *buf = NULL;
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size_t buf_len = 0, out_len = 0;
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if (var == NULL || token == NULL) {
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return;
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}
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if (sprint_realloc_variable(&buf, &buf_len, &out_len, 1,
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var->name, var->name_length, var)) {
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if (buf != NULL) {
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debugmsg(token, "%s", buf);
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}
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} else {
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if (buf != NULL) {
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debugmsg(token, "%s [TRUNCATED]", buf);
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}
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}
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if (buf != NULL) {
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free(buf);
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}
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}
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void
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debugmsg_oidrange(const char *token, const oid * theoid, size_t len,
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size_t var_subid, oid range_ubound)
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{
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u_char *buf = NULL;
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size_t buf_len = 0, out_len = 0, i = 0;
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int rc = 0;
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if (var_subid == 0) {
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rc = sprint_realloc_objid(&buf, &buf_len, &out_len, 1, theoid,
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len);
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} else {
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char tmpbuf[128];
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/* XXX - ? check for 0 == var_subid -1 ? */
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rc = sprint_realloc_objid(&buf, &buf_len, &out_len, 1, theoid,
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var_subid-1); /* Adjust for C's 0-based array indexing */
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if (rc) {
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sprintf(tmpbuf, ".%" NETSNMP_PRIo "u--%" NETSNMP_PRIo "u",
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theoid[var_subid - 1], range_ubound);
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rc = snmp_cstrcat(&buf, &buf_len, &out_len, 1, tmpbuf);
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if (rc) {
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for (i = var_subid; i < len; i++) {
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sprintf(tmpbuf, ".%" NETSNMP_PRIo "u", theoid[i]);
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if (!snmp_cstrcat(&buf, &buf_len, &out_len, 1, tmpbuf)) {
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break;
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}
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}
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}
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}
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}
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if (buf != NULL) {
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debugmsg(token, "%s%s", buf, rc ? "" : " [TRUNCATED]");
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free(buf);
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}
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}
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void
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debugmsg_hex(const char *token, const u_char * thedata, size_t len)
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{
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u_char *buf = NULL;
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size_t buf_len = 0, out_len = 0;
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if (sprint_realloc_hexstring
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(&buf, &buf_len, &out_len, 1, thedata, len)) {
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if (buf != NULL) {
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debugmsg(token, "%s", buf);
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}
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} else {
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if (buf != NULL) {
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debugmsg(token, "%s [TRUNCATED]", buf);
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}
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}
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if (buf != NULL) {
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free(buf);
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}
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}
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void
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debugmsg_hextli(const char *token, const u_char * thedata, size_t len)
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{
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char buf[SPRINT_MAX_LEN], token2[SPRINT_MAX_LEN];
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u_char *b3 = NULL;
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size_t b3_len = 0, o3_len = 0;
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int incr;
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sprintf(token2, "dumpx_%s", token);
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/*
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* XX tracing lines removed from this function DEBUGTRACE;
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*/
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DEBUGIF(token2) {
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for (incr = 16; len > 0; len -= incr, thedata += incr) {
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if ((int) len < incr) {
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incr = len;
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}
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/*
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* XXnext two lines were DEBUGPRINTINDENT(token);
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*/
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sprintf(buf, "dumpx%s", token);
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debugmsg(buf, "%s: %*s", token2, debug_indent_get(), "");
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if (sprint_realloc_hexstring
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(&b3, &b3_len, &o3_len, 1, thedata, incr)) {
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if (b3 != NULL) {
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debugmsg(token2, "%s", b3);
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}
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} else {
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if (b3 != NULL) {
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debugmsg(token2, "%s [TRUNCATED]", b3);
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}
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}
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o3_len = 0;
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}
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}
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if (b3 != NULL) {
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free(b3);
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}
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}
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void
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debugmsgtoken(const char *token, const char *format, ...)
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{
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va_list debugargs;
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va_start(debugargs, format);
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debugmsg(token, "%s: ", token);
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va_end(debugargs);
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}
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void
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debug_combo_nc(const char *token, const char *format, ...)
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{
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va_list debugargs;
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va_start(debugargs, format);
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snmp_log(debug_log_level, "%s: ", token);
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snmp_vlog(debug_log_level, format, debugargs);
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va_end(debugargs);
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}
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/*
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* for speed, these shouldn't be in default_storage space
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*/
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void
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snmp_set_do_debugging(int val)
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{
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dodebug = val;
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}
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int
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snmp_get_do_debugging(void)
|
|
{
|
|
return dodebug;
|
|
}
|
|
|
|
void
|
|
snmp_debug_shutdown(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < debug_num_tokens; i++)
|
|
SNMP_FREE(dbg_tokens[i].token_name);
|
|
}
|
|
|
|
#else /* ! NETSNMP_NO_DEBUGGING */
|
|
|
|
int debug_indent_get(void) { return 0; }
|
|
|
|
const char* debug_indent(void) { return ""; }
|
|
|
|
void debug_indent_add(int amount)
|
|
{ }
|
|
|
|
NETSNMP_IMPORT void
|
|
debug_config_register_tokens(const char *configtoken, char *tokens);
|
|
|
|
void
|
|
debug_indent_reset(void)
|
|
{ }
|
|
|
|
void
|
|
debug_config_register_tokens(const char *configtoken, char *tokens)
|
|
{ }
|
|
|
|
#ifndef NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL
|
|
static void
|
|
debug_config_debug_log_level(const char *configtoken NETSNMP_ATTRIBUTE_UNUSED,
|
|
char *tokens NETSNMP_ATTRIBUTE_UNUSED)
|
|
{ }
|
|
|
|
NETSNMP_IMPORT void
|
|
netsnmp_set_debug_log_level(int val NETSNMP_ATTRIBUTE_UNUSED)
|
|
{ }
|
|
|
|
NETSNMP_IMPORT int
|
|
netsnmp_get_debug_log_level(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL */
|
|
|
|
NETSNMP_IMPORT void
|
|
debug_config_turn_on_debugging(const char *configtoken, char *line);
|
|
|
|
void
|
|
debug_config_turn_on_debugging(const char *configtokenu, char *line)
|
|
{ }
|
|
|
|
void
|
|
debug_register_tokens(const char *tokens)
|
|
{ }
|
|
|
|
void
|
|
debug_print_registered_tokens(void)
|
|
{ }
|
|
|
|
|
|
int
|
|
debug_enable_token_logs (const char *token)
|
|
{
|
|
return SNMPERR_GENERR;
|
|
}
|
|
|
|
int
|
|
debug_disable_token_logs (const char *token)
|
|
{
|
|
return SNMPERR_GENERR;
|
|
}
|
|
|
|
int
|
|
debug_is_token_registered(const char *token)
|
|
{
|
|
return SNMPERR_GENERR;
|
|
}
|
|
|
|
void
|
|
debugmsg(const char *token, const char *format, ...)
|
|
{ }
|
|
|
|
void debugmsg_oid(const char *token, const oid * theoid, size_t len)
|
|
{ }
|
|
|
|
void
|
|
debugmsg_suboid(const char *token, const oid * theoid, size_t len)
|
|
{ }
|
|
|
|
void
|
|
debugmsg_var(const char *token, netsnmp_variable_list * var)
|
|
{ }
|
|
|
|
void
|
|
debugmsg_oidrange(const char *token, const oid * theoid, size_t len,
|
|
size_t var_subid, oid range_ubound)
|
|
{ }
|
|
|
|
void
|
|
debugmsg_hex(const char *token, const u_char * thedata, size_t len)
|
|
{ }
|
|
|
|
void
|
|
debugmsg_hextli(const char *token, const u_char * thedata, size_t len)
|
|
{ }
|
|
|
|
void
|
|
debugmsgtoken(const char *token, const char *format, ...)
|
|
{ }
|
|
|
|
void
|
|
debug_combo_nc(const char *token, const char *format, ...)
|
|
{ }
|
|
|
|
void
|
|
snmp_set_do_debugging(int val)
|
|
{ }
|
|
|
|
int
|
|
snmp_get_do_debugging(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
snmp_debug_shutdown(void)
|
|
{ }
|
|
|
|
#endif /* NETSNMP_NO_DEBUGGING */
|
|
|
|
void
|
|
snmp_debug_init(void)
|
|
{
|
|
register_prenetsnmp_mib_handler("snmp", "doDebugging",
|
|
debug_config_turn_on_debugging, NULL,
|
|
"(1|0)");
|
|
register_prenetsnmp_mib_handler("snmp", "debugTokens",
|
|
debug_config_register_tokens, NULL,
|
|
"token[,token...]");
|
|
#ifndef NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL
|
|
register_prenetsnmp_mib_handler("snmp", "debugLogLevel",
|
|
debug_config_debug_log_level, NULL,
|
|
"(emerg|alert|crit|err|warning|notice|info|debug)");
|
|
#endif /* NETSNMP_DISABLE_DYNAMIC_LOG_LEVEL */
|
|
}
|
|
|