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/*
Created from the snmputil sample in the Microsoft SDK for NT
*/
#include "php.h"
#if COMPILE_DL
#include "../phpdl.h"
#include "functions/dl.h"
#endif
#include "php_snmp.h"
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <malloc.h>
#if HAVE_SNMP
#include <snmp.h>
#include <mgmtapi.h>
/* {{{ snmp_functions[]
*/
zend_function_entry snmp_functions[] = {
{"snmpget", php3_snmpget, NULL},
{"snmpwalk", php3_snmpwalk, NULL},
{NULL,NULL,NULL}
};
/* }}} */
/* {{{ snmp_module_entry
*/
zend_module_entry snmp_module_entry = {
STANDARD_MODULE_HEADER,
"SNMP",
snmp_functions,
NULL,
NULL,
NULL,
NULL,
NULL,
NO_VERSION_YET,
STANDARD_MODULE_PROPERTIES
};
/* }}} */
#if COMPILE_DL
DLEXPORT zend_module_entry *get_module() { return &snmp_module_entry; }
#endif
#define GET 1
#define WALK 2
#define GETNEXT 3
#define TIMEOUT 6000 /* milliseconds */
#define RETRIES 3
/* {{{ _php_snmp
*/
void _php_snmp(INTERNAL_FUNCTION_PARAMETERS, int st) {
zval *a1, *a2, *a3;
INT operation;
LPSTR agent;
LPSTR community;
RFC1157VarBindList variableBindings;
LPSNMP_MGR_SESSION session;
INT timeout = TIMEOUT;
INT retries = RETRIES;
BYTE requestType;
AsnInteger errorStatus;
AsnInteger errorIndex;
AsnObjectIdentifier oid;
char *chkPtr = NULL;
if (zend_get_parameters_ex(3, &a1, &a2, &a3) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(a1);
convert_to_string_ex(a2);
convert_to_string_ex(a3);
agent=Z_STRVAL_PP(a1);
community=Z_STRVAL_PP(a2);
operation=st;
SnmpMgrStrToOid(Z_STRVAL_PP(a3), &oid);
/*
I've limited this to only one oid, but we can create a
list of oid's here, and expand the function to take multiple
oid's
*/
variableBindings.list->name = oid;
variableBindings.list->value.asnType = ASN_NULL;
variableBindings.len = 1;
/* Establish a SNMP session to communicate with the remote agent. The
community, communications timeout, and communications retry count
for the session are also required.
*/
if ((session = SnmpMgrOpen(agent, community, timeout, retries)) == NULL){
php_error_docref(NULL TSRMLS_CC, E_WARNING, "error on SnmpMgrOpen %d", GetLastError());
}
/* Determine and perform the requested operation.*/
if (operation == GET || operation == GETNEXT){
/* Get and GetNext are relatively simple operations to perform.
Simply initiate the request and process the result and/or
possible error conditions. */
if (operation == GET){
requestType = ASN_RFC1157_GETREQUEST;
} else {
requestType = ASN_RFC1157_GETNEXTREQUEST;
}
/* Request that the API carry out the desired operation.*/
if (!SnmpMgrRequest(session, requestType, &variableBindings,
&errorStatus, &errorIndex)){
/* The API is indicating an error. */
php_error_docref(NULL TSRMLS_CC, E_WARNING, "error on SnmpMgrRequest %d", GetLastError());
} else {
/* The API succeeded, errors may be indicated from the remote
agent. */
if (errorStatus > 0){
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Error: errorStatus=%d, errorIndex=%d",
errorStatus, errorIndex);
} else {
/* Display the resulting variable bindings.*/
UINT i;
char *str = NULL;
for(i=0; i < variableBindings.len; i++)
{
SnmpMgrOidToStr(&variableBindings.list[i].name, &str);
php_printf("Variable = %s\n", str);
if (str) SNMP_free(str);
php_printf("Value = ");
SnmpUtilPrintAsnAny(&variableBindings.list[i].value);
php_printf("\n");
} /* end for() */
}
}
/* Free the variable bindings that have been allocated.*/
SnmpUtilVarBindListFree(&variableBindings);
}
else if (operation == WALK)
{
/* Walk is a common term used to indicate that all MIB variables
under a given OID are to be traversed and displayed. This is
a more complex operation requiring tests and looping in addition
to the steps for get/getnext above. */
AsnObjectIdentifier root;
AsnObjectIdentifier tempOid;
SnmpUtilOidCpy(&root, &variableBindings.list[0].name);
requestType = ASN_RFC1157_GETNEXTREQUEST;
while(1)
{
if (!SnmpMgrRequest(session, requestType, &variableBindings,
&errorStatus, &errorIndex)){
/* The API is indicating an error.*/
php_error_docref(NULL TSRMLS_CC, E_WARNING, "error on SnmpMgrRequest %d", GetLastError());
break;
}
else
{
/* The API succeeded, errors may be indicated from the remote
agent.
Test for end of subtree or end of MIB. */
if (errorStatus == SNMP_ERRORSTATUS_NOSUCHNAME ||
SnmpUtilOidNCmp(&variableBindings.list[0].name,
&root, root.idLength))
{
PUTS("End of MIB subtree.\n\n");
break;
}
/* Test for general error conditions or sucesss. */
if (errorStatus > 0){
php_error_docref(NULL TSRMLS_CC, E_ERROR,"Error: errorStatus=%d, errorIndex=%d", errorStatus, errorIndex);
break;
}
else
{
/* Display resulting variable binding for this iteration. */
char *str = NULL;
SnmpMgrOidToStr(&variableBindings.list[0].name, &str);
php_printf("Variable = %s\n", str);
if (str) SNMP_free(str);
php_printf("Value = ");
SnmpUtilPrintAsnAny(&variableBindings.list[0].value);
php_printf("\n");
}
} /* end if () */
/* Prepare for the next iteration. Make sure returned oid is
preserved and the returned value is freed.
*/
SnmpUtilOidCpy(&tempOid, &variableBindings.list[0].name);
SnmpUtilVarBindFree(&variableBindings.list[0]);
SnmpUtilOidCpy(&variableBindings.list[0].name, &tempOid);
variableBindings.list[0].value.asnType = ASN_NULL;
SnmpUtilOidFree(&tempOid);
} /* end while() */
/* Free the variable bindings that have been allocated.*/
SnmpUtilVarBindListFree(&variableBindings);
SnmpUtilOidFree(&root);
} /* end if (operation) */
/* Close SNMP session with the remote agent.*/
if (!SnmpMgrClose(session)){
php_error_docref(NULL TSRMLS_CC, E_WARNING, "error on SnmpMgrClose %d", GetLastError());
}
}
/* }}} */
/* {{{ php3_snmpget
*/
DLEXPORT void php3_snmpget(INTERNAL_FUNCTION_PARAMETERS) {
_php_snmp(INTERNAL_FUNCTION_PARAM_PASSTHRU,1);
}
/* }}} */
/* {{{ php3_snmpwalk
*/
DLEXPORT void php3_snmpwalk(INTERNAL_FUNCTION_PARAMETERS) {
_php_snmp(INTERNAL_FUNCTION_PARAM_PASSTHRU,2);
}
/* }}} */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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