void
snmp_enable_syslog_ident(const char *ident, const int facility)
{
netsnmp_log_handler *logh;
int found = 0;
int enable = 1;
#ifdef WIN32
HANDLE eventlog_h;
#else
void *eventlog_h = NULL;
#endif
snmp_disable_syslog(); /* only one syslog at a time */
#ifdef WIN32
eventlog_h = OpenEventLog(NULL, ident);
if (eventlog_h == NULL) {
/*
* Hmmm.....
* Maybe disable this handler, and log the error ?
*/
fprintf(stderr, "Could not open event log for %s. "
"Last error: 0x%x\n", ident, GetLastError());
enable = 0;
}
#else
openlog(snmp_log_syslogname(ident), LOG_CONS | LOG_PID, facility);
#endif
for (logh = logh_head; logh; logh = logh->next)
if (logh->type == NETSNMP_LOGHANDLER_SYSLOG) {
logh->magic = (void*)eventlog_h;
logh->imagic = enable; /* syslog open */
if (logh->enabled && (0 == enable))
netsnmp_disable_this_loghandler(logh);
else if ((0 == logh->enabled) && enable)
netsnmp_enable_this_loghandler(logh);
found = 1;
}
if (!found) {
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_SYSLOG,
LOG_DEBUG );
if (logh) {
logh->magic = (void*)eventlog_h;
logh->token = strdup(ident);
logh->imagic = enable; /* syslog open */
if (logh->enabled && (0 == enable))
netsnmp_disable_this_loghandler(logh);
else if ((0 == logh->enabled) && enable)
netsnmp_enable_this_loghandler(logh);
}
}
}
netsnmp_log_handler *
netsnmp_register_loghandler( int type, int priority )
{
netsnmp_log_handler *logh;
logh = SNMP_MALLOC_TYPEDEF(netsnmp_log_handler);
if (!logh)
return NULL;
DEBUGMSGT(("logging:register", "registering log type %d with pri %d\n",
type, priority));
if (priority > LOG_DEBUG) {
DEBUGMSGT(("logging:register", " limiting pri %d to %d\n", priority,
LOG_DEBUG));
priority = LOG_DEBUG;
}
logh->type = type;
switch ( type ) {
case NETSNMP_LOGHANDLER_STDOUT:
logh->imagic = 1;
logh->handler = log_handler_stdouterr;
break;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_STDIO
case NETSNMP_LOGHANDLER_STDERR:
logh->handler = log_handler_stdouterr;
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_STDIO */
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
case NETSNMP_LOGHANDLER_FILE:
logh->handler = log_handler_file;
logh->imagic = 1;
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
case NETSNMP_LOGHANDLER_SYSLOG:
logh->handler = log_handler_syslog;
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
case NETSNMP_LOGHANDLER_CALLBACK:
logh->handler = log_handler_callback;
break;
case NETSNMP_LOGHANDLER_NONE:
logh->handler = log_handler_null;
break;
default:
free(logh);
return NULL;
}
logh->priority = priority;
netsnmp_enable_this_loghandler(logh);
netsnmp_add_loghandler( logh );
return logh;
}
int
netsnmp_enable_loghandler( const char *token )
{
netsnmp_log_handler *logh;
logh = netsnmp_find_loghandler( token );
if (!logh)
return 0;
netsnmp_enable_this_loghandler(logh);
return 1;
}
void
snmp_enable_calllog(void) /* XXX - or take a callback routine ??? */
{
netsnmp_log_handler *logh;
int found = 0;
for (logh = logh_head; logh; logh = logh->next)
if (logh->type == NETSNMP_LOGHANDLER_CALLBACK) {
netsnmp_enable_this_loghandler(logh);
found = 1;
}
if (!found) {
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_CALLBACK,
LOG_DEBUG );
if (logh)
logh->token = strdup("callback");
}
}
void
netsnmp_enable_filelog(netsnmp_log_handler *logh, int dont_zero_log)
{
FILE *logfile;
if (!logh)
return;
if (!logh->magic) {
logfile = fopen(logh->token, dont_zero_log ? "a" : "w");
if (!logfile) {
snmp_log_perror(logh->token);
return;
}
logh->magic = (void*)logfile;
netsnmp_set_line_buffering(logfile);
}
netsnmp_enable_this_loghandler(logh);
}
netsnmp_log_handler *
netsnmp_register_loghandler( int type, int priority )
{
netsnmp_log_handler *logh;
logh = SNMP_MALLOC_TYPEDEF(netsnmp_log_handler);
if (!logh)
return NULL;
DEBUGMSGT(("logging:register", "registering log type %d with pri %d\n",
type, priority));
logh->type = type;
switch ( type ) {
case NETSNMP_LOGHANDLER_STDOUT:
logh->imagic = 1;
/* fallthrough */
case NETSNMP_LOGHANDLER_STDERR:
logh->handler = log_handler_stdouterr;
break;
case NETSNMP_LOGHANDLER_FILE:
logh->handler = log_handler_file;
logh->imagic = 1;
break;
case NETSNMP_LOGHANDLER_SYSLOG:
logh->handler = log_handler_syslog;
break;
case NETSNMP_LOGHANDLER_CALLBACK:
logh->handler = log_handler_callback;
break;
case NETSNMP_LOGHANDLER_NONE:
logh->handler = log_handler_null;
break;
default:
free(logh);
return NULL;
}
logh->priority = priority;
netsnmp_enable_this_loghandler(logh);
netsnmp_add_loghandler( logh );
return logh;
}
/* used in the perl modules and ip-mib/ipv4InterfaceTable/ipv4InterfaceTable_subagent.c */
void
snmp_enable_stderrlog(void)
{
netsnmp_log_handler *logh;
int found = 0;
for (logh = logh_head; logh; logh = logh->next)
if (logh->type == NETSNMP_LOGHANDLER_STDOUT ||
logh->type == NETSNMP_LOGHANDLER_STDERR) {
netsnmp_enable_this_loghandler(logh);
found = 1;
}
if (!found) {
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_STDERR,
LOG_DEBUG );
if (logh)
logh->token = strdup("stderr");
}
}
int
handle_nsLoggingTable(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
long temp;
netsnmp_request_info *request = NULL;
netsnmp_table_request_info *table_info = NULL;
netsnmp_log_handler *logh = NULL;
netsnmp_variable_list *idx = NULL;
switch (reqinfo->mode) {
case MODE_GET:
for (request=requests; request; request=request->next) {
if (request->processed != 0)
continue;
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_TYPE:
if (!logh) {
netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
continue;
}
temp = logh->type;
snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
(u_char*)&temp,
sizeof(temp));
break;
case NSLOGGING_MAXLEVEL:
if (!logh) {
netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
continue;
}
temp = logh->pri_max;
snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
(u_char*)&temp,
sizeof(temp));
break;
case NSLOGGING_STATUS:
if (!logh) {
netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
continue;
}
temp = (logh->type ?
(logh->enabled ?
RS_ACTIVE:
RS_NOTINSERVICE) :
RS_NOTREADY);
snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
(u_char*)&temp, sizeof(temp));
break;
default:
netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHOBJECT);
continue;
}
}
break;
#ifndef NETSNMP_NO_WRITE_SUPPORT
case MODE_SET_RESERVE1:
for (request=requests; request; request=request->next) {
if ( request->status != 0 ) {
return SNMP_ERR_NOERROR; /* Already got an error */
}
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_TYPE:
if ( request->requestvb->type != ASN_INTEGER ) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGTYPE);
return SNMP_ERR_WRONGTYPE;
}
if (*request->requestvb->val.integer < 0 ) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGVALUE);
return SNMP_ERR_WRONGVALUE;
}
/*
* It's OK to create a new logging entry
* (either in one go, or built up using createAndWait)
* but it's not possible to change the type of an entry
* once it's been created.
*/
if (logh && logh->type) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_NOTWRITABLE);
return SNMP_ERR_NOTWRITABLE;
}
break;
case NSLOGGING_MAXLEVEL:
if ( request->requestvb->type != ASN_INTEGER ) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGTYPE);
return SNMP_ERR_WRONGTYPE;
}
if (*request->requestvb->val.integer < 0 ||
*request->requestvb->val.integer > 7 ) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGVALUE);
return SNMP_ERR_WRONGVALUE;
}
break;
case NSLOGGING_STATUS:
if ( request->requestvb->type != ASN_INTEGER ) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGTYPE);
return SNMP_ERR_WRONGTYPE;
}
switch ( *request->requestvb->val.integer ) {
case RS_ACTIVE:
case RS_NOTINSERVICE:
/*
* Can only work on existing rows
*/
if (!logh) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_INCONSISTENTVALUE);
return SNMP_ERR_INCONSISTENTVALUE;
}
break;
case RS_CREATEANDWAIT:
case RS_CREATEANDGO:
/*
* Can only work with new rows
*/
if (logh) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_INCONSISTENTVALUE);
return SNMP_ERR_INCONSISTENTVALUE;
}
/*
* Normally, we'd create the row at a later stage
* (probably during the RESERVE2 or ACTION passes)
*
* But we need to check that the values are
* consistent during the ACTION pass (which is the
* latest that an error can be safely handled),
* so the values all need to be set up before this
* (i.e. during the RESERVE2 pass)
* So the new row needs to be created before that
* in order to have somewhere to put them.
*
* That's why we're doing this here.
*/
idx = table_info->indexes;
logh = netsnmp_register_loghandler(
/* not really, but we need a valid type */
NETSNMP_LOGHANDLER_STDOUT,
*idx->val.integer);
if (!logh) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_GENERR); /* ??? */
return SNMP_ERR_GENERR;
}
idx = idx->next_variable;
logh->type = 0;
logh->token = strdup((char *) idx->val.string);
netsnmp_insert_iterator_context(request, (void*)logh);
break;
case RS_DESTROY:
/*
* Can work with new or existing rows
*/
break;
case RS_NOTREADY:
default:
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_WRONGVALUE);
return SNMP_ERR_WRONGVALUE;
}
break;
default:
netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHOBJECT);
return SNMP_NOSUCHOBJECT;
}
}
break;
case MODE_SET_RESERVE2:
for (request=requests; request; request=request->next) {
if ( request->status != 0 ) {
return SNMP_ERR_NOERROR; /* Already got an error */
}
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_TYPE:
/*
* If we're creating a row using createAndGo,
* we need to set the type early, so that we
* can validate it in the ACTION pass.
*
* Remember that we need to be able to reverse this
*/
if ( logh )
logh->type = *request->requestvb->val.integer;
break;
/*
* Don't need to handle nsLogToken or nsLogStatus in this pass
*/
}
}
break;
case MODE_SET_ACTION:
for (request=requests; request; request=request->next) {
if (request->processed != 0)
continue;
if ( request->status != 0 ) {
return SNMP_ERR_NOERROR; /* Already got an error */
}
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_STATUS:
/*
* This is where we can check the internal consistency
* of the request. Basically, for a row to be marked
* 'active', then there needs to be a valid type value.
*/
switch ( *request->requestvb->val.integer ) {
case RS_ACTIVE:
case RS_CREATEANDGO:
if ( !logh || !logh->type ) {
netsnmp_set_request_error(reqinfo, request,
SNMP_ERR_INCONSISTENTVALUE);
return SNMP_ERR_INCONSISTENTVALUE;
}
break;
}
break;
/*
* Don't need to handle nsLogToken or nsLogType in this pass
*/
}
}
break;
case MODE_SET_FREE:
case MODE_SET_UNDO:
/*
* If any resources were allocated in either of the
* two RESERVE passes, they need to be released here,
* and any assignments (in RESERVE2) reversed.
*
* Nothing additional will have been done during ACTION
* so this same code can do for UNDO as well.
*/
for (request=requests; request; request=request->next) {
if (request->processed != 0)
continue;
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_TYPE:
/*
* If we've been setting the type, and the request
* has failed, then revert to an unset type.
*
* We need to be careful here - if the reason it failed is
* that the type was already set, then we shouldn't "undo"
* the assignment (since it won't actually have been made).
*
* Check the current value against the 'new' one. If they're
* the same, then this is probably a successful assignment,
* and the failure was elsewhere, so we need to undo it.
* (Or else there was an attempt to write the same value!)
*/
if ( logh && logh->type == *request->requestvb->val.integer )
logh->type = 0;
break;
case NSLOGGING_STATUS:
temp = *request->requestvb->val.integer;
if ( logh && ( temp == RS_CREATEANDGO ||
temp == RS_CREATEANDWAIT)) {
netsnmp_remove_loghandler( logh );
}
break;
/*
* Don't need to handle nsLogToken in this pass
*/
}
}
break;
case MODE_SET_COMMIT:
for (request=requests; request; request=request->next) {
if (request->processed != 0)
continue;
if ( request->status != 0 ) {
return SNMP_ERR_NOERROR; /* Already got an error */
}
logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
if (!logh) {
netsnmp_set_request_error(reqinfo, request, SNMP_ERR_COMMITFAILED);
return SNMP_ERR_COMMITFAILED; /* Shouldn't happen! */
}
table_info = netsnmp_extract_table_info(request);
switch (table_info->colnum) {
case NSLOGGING_MAXLEVEL:
logh->pri_max = *request->requestvb->val.integer;
break;
case NSLOGGING_STATUS:
switch (*request->requestvb->val.integer) {
case RS_ACTIVE:
case RS_CREATEANDGO:
netsnmp_enable_this_loghandler(logh);
break;
case RS_NOTINSERVICE:
case RS_CREATEANDWAIT:
netsnmp_disable_this_loghandler(logh);
break;
case RS_DESTROY:
netsnmp_remove_loghandler( logh );
break;
}
break;
}
}
break;
#endif /* !NETSNMP_NO_WRITE_SUPPORT */
}
return SNMP_ERR_NOERROR;
}
