void
snmp_log_string (int priority, const char *string)
{
char sbuf[40];
struct snmp_log_message slm;
#if HAVE_SYSLOG_H
if (do_syslogging) {
syslog(priority, string);
}
#endif
if (do_log_callback) {
slm.priority = priority;
slm.msg = string;
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING, &slm);
}
if (do_filelogging || do_stderrlogging) {
if (ds_get_boolean(DS_LIBRARY_ID, DS_LIB_LOG_TIMESTAMP) && newline) {
sprintf_stamp(NULL, (char *)&sbuf);
} else {
strcpy(sbuf, "");
}
newline = string[strlen(string)-1] == '\n';
if (do_filelogging)
fprintf(logfile, "%s%s", sbuf, string);
if (do_stderrlogging)
fprintf(stderr, "%s%s", sbuf, string);
}
}
/*
* check a session validity for connectivity to the master agent. If
* not functioning, close and start attempts to reopen the session
*/
void
agentx_check_session(unsigned int clientreg, void *clientarg)
{
netsnmp_session *ss = (netsnmp_session *) clientarg;
if (!ss) {
if (clientreg)
snmp_alarm_unregister(clientreg);
return;
}
DEBUGMSGTL(("agentx/subagent", "checking status of session %p\n", ss));
if (!agentx_send_ping(ss)) {
snmp_log(LOG_WARNING,
"AgentX master agent failed to respond to ping. Attempting to re-register.\n");
/*
* master agent disappeared? Try and re-register.
* close first, just to be sure .
*/
agentx_unregister_callbacks(ss);
agentx_close_session(ss, AGENTX_CLOSE_TIMEOUT);
snmp_alarm_unregister(clientreg); /* delete ping alarm timer */
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_INDEX_STOP, (void *) ss);
snmp_close(main_session);
main_session = NULL;
agentx_reopen_session(0, NULL);
} else {
DEBUGMSGTL(("agentx/subagent", "session %p responded to ping\n",
ss));
}
}
int
in_a_view(oid *name, /* IN - name of var, OUT - name matched */
size_t *namelen, /* IN -number of sub-ids in name*/
struct snmp_pdu *pdu, /* IN - relevant auth info re PDU */
int type) /* IN - variable type being checked */
{
struct view_parameters view_parms;
view_parms.pdu = pdu;
view_parms.name = name;
if (namelen)
view_parms.namelen = *namelen;
else
view_parms.namelen = 0;
view_parms.errorcode = 0;
if (pdu->flags & UCD_MSG_FLAG_ALWAYS_IN_VIEW)
return 0; /* Enable bypassing of view-based access control */
/* check for v1 and counter64s, since snmpv1 doesn't support it */
if (pdu->version == SNMP_VERSION_1 && type == ASN_COUNTER64)
return 5;
switch (pdu->version) {
case SNMP_VERSION_1:
case SNMP_VERSION_2c:
#ifdef CYGPKG_SNMPAGENT_V3_SUPPORT
case SNMP_VERSION_3:
#endif
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_ACM_CHECK,
&view_parms);
return view_parms.errorcode;
}
return 1;
}
/* in_a_view: determines if a given snmp_pdu is ever going to be allowed to do
anynthing or if it's not going to ever be authenticated. */
int
check_access(struct snmp_pdu *pdu) /* IN - pdu being checked */
{
struct view_parameters view_parms;
view_parms.pdu = pdu;
view_parms.name = 0;
view_parms.namelen = 0;
view_parms.errorcode = 0;
if (pdu->flags & UCD_MSG_FLAG_ALWAYS_IN_VIEW)
return 0; /* Enable bypassing of view-based access control */
switch (pdu->version) {
case SNMP_VERSION_1:
case SNMP_VERSION_2c:
#ifdef CYGPKG_SNMPAGENT_V3_SUPPORT
case SNMP_VERSION_3:
#endif
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_ACM_CHECK_INITIAL,
&view_parms);
return view_parms.errorcode;
}
return 1;
}
void
update_config(void)
{
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_PRE_UPDATE_CONFIG, NULL);
free_config();
read_configs();
}
/*
* check a session validity for connectivity to the master agent. If
* not functioning, close and start attempts to reopen the session
*/
void agentx_check_session (unsigned int clientreg, void *clientarg)
{
netsnmp_session *ss = (netsnmp_session *) clientarg;
if (!ss)
{
if (clientreg)
snmp_alarm_unregister (clientreg);
return;
}
DEBUGMSGTL (("agentx/subagent", "checking status of session %p\n", ss));
if (!agentx_send_ping (ss))
{
snmp_log (LOG_WARNING, "AgentX master agent failed to respond to ping. Attempting to re-register.\n");
/*
* master agent disappeared? Try and re-register.
* close first, just to be sure .
*/
agentx_unregister_callbacks (ss);
agentx_close_session (ss, AGENTX_CLOSE_TIMEOUT);
snmp_alarm_unregister (clientreg); /* delete ping alarm timer */
snmp_call_callbacks (SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_INDEX_STOP, (void *) ss);
register_mib_detach ();
if (main_session != NULL)
{
remove_trap_session (ss);
snmp_close (main_session);
/*
* We need to remove the callbacks attached to the callback
* session because they have a magic callback data structure
* which includes a pointer to the main session
* (which is no longer valid).
*
* Given that the main session is not responsive anyway.
* it shoudn't matter if we lose some outstanding requests.
*/
if (agentx_callback_sess != NULL)
{
snmp_close (agentx_callback_sess);
agentx_callback_sess = NULL;
subagent_init_callback_session ();
}
main_session = NULL;
agentx_reopen_session (0, NULL);
}
else
{
snmp_close (main_session);
main_session = NULL;
}
}
else
{
DEBUGMSGTL (("agentx/subagent", "session %p responded to ping\n", ss));
}
}
void
read_premib_configs (void)
{
DEBUGMSGTL(("read_config","reading premib configuration tokens\n"));
if (!ds_get_boolean(DS_LIBRARY_ID, DS_LIB_DONT_READ_CONFIGS))
read_config_files(PREMIB_CONFIG);
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY,
SNMP_CALLBACK_POST_PREMIB_READ_CONFIG,
NULL);
}
int register_sysORTable_sess(oid *oidin,
size_t oidlen,
const char *descr,
struct snmp_session *ss)
{
struct sysORTable **ptr=&table;
struct register_sysOR_parameters reg_sysOR_parms;
DEBUGMSGTL(("mibII/sysORTable", "sysORTable registering: "));
DEBUGMSGOID(("mibII/sysORTable", oidin, oidlen));
DEBUGMSG(("mibII/sysORTable","\n"));
while(*ptr != NULL)
ptr = &((*ptr)->next);
*ptr = (struct sysORTable *) malloc(sizeof(struct sysORTable));
if ( *ptr == NULL ) {
return SYS_ORTABLE_REGISTRATION_FAILED;
}
(*ptr)->OR_descr = (char *) malloc(strlen(descr)+1);
if ( (*ptr)->OR_descr == NULL ) {
free( *ptr );
return SYS_ORTABLE_REGISTRATION_FAILED;
}
strcpy((*ptr)->OR_descr, descr);
(*ptr)->OR_oidlen = oidlen;
(*ptr)->OR_oid = (oid *) malloc(sizeof(oid)*oidlen);
if ( (*ptr)->OR_oid == NULL ) {
free( *ptr );
free( (*ptr)->OR_descr );
return SYS_ORTABLE_REGISTRATION_FAILED;
}
memcpy((*ptr)->OR_oid, oidin, sizeof(oid)*oidlen);
gettimeofday(&((*ptr)->OR_uptime), NULL);
(*ptr)->OR_sess = ss;
(*ptr)->next = NULL;
numEntries++;
reg_sysOR_parms.name = oidin;
reg_sysOR_parms.namelen = oidlen;
reg_sysOR_parms.descr = descr;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_REG_SYSOR,
®_sysOR_parms);
return SYS_ORTABLE_REGISTERED_OK;
}
int
log_handler_callback(netsnmp_log_handler* logh, int pri, const char *str)
{
/*
* XXX - perhaps replace 'snmp_call_callbacks' processing
* with individual callback log_handlers ??
*/
struct snmp_log_message slm;
int dodebug = snmp_get_do_debugging();
slm.priority = pri;
slm.msg = str;
if (dodebug) /* turn off debugging inside the callbacks else will loop */
snmp_set_do_debugging(0);
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING, &slm);
if (dodebug)
snmp_set_do_debugging(dodebug);
return 1;
}
void
read_configs (void)
{
char *optional_config = ds_get_string(DS_LIBRARY_ID, DS_LIB_OPTIONALCONFIG);
char *type = ds_get_string(DS_LIBRARY_ID, DS_LIB_APPTYPE);
DEBUGMSGTL(("read_config","reading normal configuration tokens\n"));
if (!ds_get_boolean(DS_LIBRARY_ID, DS_LIB_DONT_READ_CONFIGS))
read_config_files(NORMAL_CONFIG);
/* do this even when the normal above wasn't done */
if (optional_config && type)
read_config_with_type(optional_config, type);
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_POST_READ_CONFIG,
NULL);
}
int unregister_sysORTable_sess(oid *oidin,
size_t oidlen,
struct snmp_session *ss)
{
struct sysORTable **ptr=&table, *prev=NULL;
int found = SYS_ORTABLE_NO_SUCH_REGISTRATION;
struct register_sysOR_parameters reg_sysOR_parms;
DEBUGMSGTL(("mibII/sysORTable", "sysORTable unregistering: "));
DEBUGMSGOID(("mibII/sysORTable", oidin, oidlen));
DEBUGMSG(("mibII/sysORTable","\n"));
while(*ptr != NULL) {
if ( snmp_oid_compare( oidin, oidlen, (*ptr)->OR_oid, (*ptr)->OR_oidlen) == 0 ) {
if ( (*ptr)->OR_sess != ss )
continue; /* different session */
if ( prev == NULL )
table = (*ptr)->next;
else
prev->next = (*ptr)->next;
free( (*ptr)->OR_descr );
free( (*ptr)->OR_oid );
free( (*ptr) );
numEntries--;
found = SYS_ORTABLE_UNREGISTERED_OK;
break;
}
prev = *ptr;
ptr = &((*ptr)->next);
}
reg_sysOR_parms.name = oidin;
reg_sysOR_parms.namelen = oidlen;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_UNREG_SYSOR,
®_sysOR_parms);
return found;
}
int
add_trap_session(netsnmp_session * ss, int pdutype, int confirm,
int version)
{
if (snmp_callback_available(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_REGISTER_NOTIFICATIONS) ==
SNMPERR_SUCCESS) {
/*
* something else wants to handle notification registrations
*/
struct agent_add_trap_args args;
DEBUGMSGTL(("trap", "adding callback trap sink\n"));
args.ss = ss;
args.confirm = confirm;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_REGISTER_NOTIFICATIONS,
(void *) &args);
} else {
/*
* no other support exists, handle it ourselves.
*/
struct trap_sink *new_sink;
DEBUGMSGTL(("trap", "adding internal trap sink\n"));
new_sink = (struct trap_sink *) malloc(sizeof(*new_sink));
if (new_sink == NULL)
return 0;
new_sink->sesp = ss;
new_sink->pdutype = pdutype;
new_sink->version = version;
new_sink->next = sinks;
sinks = new_sink;
}
return 1;
}
int
writeSystem(int action,
u_char * var_val,
u_char var_val_type,
size_t var_val_len,
u_char * statP, oid * name, size_t name_len)
{
u_char *cp;
char *buf = NULL, *oldbuf = NULL;
int count, *setvar = NULL;
switch ((char) name[7]) {
case VERSION_DESCR:
case VERSIONID:
case UPTIME:
snmp_log(LOG_ERR, "Attempt to write to R/O OID\n");
return SNMP_ERR_NOTWRITABLE;
case SYSCONTACT:
buf = sysContact;
oldbuf = oldsysContact;
setvar = &sysContactSet;
break;
case SYSTEMNAME:
buf = sysName;
oldbuf = oldsysName;
setvar = &sysNameSet;
break;
case SYSLOCATION:
buf = sysLocation;
oldbuf = oldsysLocation;
setvar = &sysLocationSet;
break;
case SYSSERVICES:
case SYSORLASTCHANGE:
snmp_log(LOG_ERR, "Attempt to write to R/O OID\n");
return SNMP_ERR_NOTWRITABLE;
default:
return SNMP_ERR_GENERR; /* ??? */
}
switch (action) {
case RESERVE1: /* Check values for acceptability */
if (var_val_type != ASN_OCTET_STR) {
snmp_log(LOG_ERR, "not string\n");
return SNMP_ERR_WRONGTYPE;
}
if (var_val_len > sizeof(sysLocation) - 1) {
snmp_log(LOG_ERR, "bad length\n");
return SNMP_ERR_WRONGLENGTH;
}
for (cp = var_val, count = 0; count < (int) var_val_len;
count++, cp++) {
if (!isprint(*cp)) {
snmp_log(LOG_ERR, "not print %x\n", *cp);
return SNMP_ERR_WRONGVALUE;
}
/* purpose : 0012435 author : Gavin.Lin date : 2010-08-04 */
/* description : Customer requirements */
else
{
if ((*cp == 0x22) || (*cp == 0x25) || (*cp == 0x27) || (*cp == 0x5C))
{
return SNMP_ERR_WRONGVALUE;
}
}
}
if (setvar != NULL && *setvar < 0) {
/*
* The object is set in a read-only configuration file.
*/
return SNMP_ERR_NOTWRITABLE;
}
break;
case RESERVE2: /* Allocate memory and similar resources */
/*
* Using static strings, so nothing needs to be done
*/
break;
case ACTION: /* Perform the SET action (if reversible) */
/*
* Save the old value, in case of UNDO
*/
strcpy(oldbuf, buf);
memcpy(buf, var_val, var_val_len);
buf[var_val_len] = 0;
break;
case UNDO: /* Reverse the SET action and free resources */
strcpy(buf, oldbuf);
oldbuf[0] = 0;
break;
case COMMIT:
if (setvar != NULL) {
*setvar = 1;
}
snmp_save_persistent(netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPTYPE));
(void) snmp_call_callbacks(SNMP_CALLBACK_LIBRARY,
SNMP_CALLBACK_STORE_DATA, NULL);
snmp_clean_persistent(netsnmp_ds_get_string
(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPTYPE));
case FREE: /* Free any resources allocated */
/*
* No resources have been allocated, but "empty" the 'oldbuf'
*/
oldbuf[0] = 0;
break;
}
return SNMP_ERR_NOERROR;
} /* end of writeSystem */
/*******************************************************************-o-******
*/
int
main(int argc, char **argv)
{
int rval = SNMPERR_SUCCESS;
size_t oldKu_len = SNMP_MAXBUF_SMALL,
newKu_len = SNMP_MAXBUF_SMALL,
oldkul_len = SNMP_MAXBUF_SMALL,
newkul_len = SNMP_MAXBUF_SMALL,
keychange_len = SNMP_MAXBUF_SMALL;
char *s = NULL;
u_char oldKu[SNMP_MAXBUF_SMALL],
newKu[SNMP_MAXBUF_SMALL],
oldkul[SNMP_MAXBUF_SMALL],
newkul[SNMP_MAXBUF_SMALL],
keychange[SNMP_MAXBUF_SMALL];
int i;
int arg = 1;
local_progname = argv[0];
/*
* Parse.
*/
for(; (arg < argc) && (argv[arg][0] == '-') ; arg++){
switch(argv[arg][1]){
case 'D': snmp_set_do_debugging(1); break;
case 'E': engineid = (u_char *)argv[++arg]; break;
case 'f': forcepassphrase = 1; break;
case 'N': newpass = argv[++arg]; break;
case 'O': oldpass = argv[++arg]; break;
case 'P': promptindicator = 0; break;
case 't': transform_type_input = argv[++arg]; break;
case 'v': verbose = 1; break;
case 'V': visible = 1; break;
case 'h':
rval = 0;
default:
usage_to_file(stdout);
exit(rval);
}
}
if ( !transform_type_input ) {
fprintf(stderr, "The -t option is mandatory.\n");
usage_synopsis(stdout);
exit(1000);
}
/*
* Convert and error check transform_type.
*/
if ( !strcmp(transform_type_input, "md5") ) {
transform_type = usmHMACMD5AuthProtocol;
} else if ( !strcmp(transform_type_input, "sha1") ) {
transform_type = usmHMACSHA1AuthProtocol;
} else {
fprintf(stderr,
"Unrecognized hash transform: \"%s\".\n",
transform_type_input);
usage_synopsis(stderr);
QUITFUN(rval = SNMPERR_GENERR, main_quit);
}
if (verbose) {
fprintf(stderr, "Hash:\t\t%s\n",
(transform_type == usmHMACMD5AuthProtocol)
? "usmHMACMD5AuthProtocol"
: "usmHMACSHA1AuthProtocol"
);
}
/*
* Build engineID. Accept hex engineID as the bits
* "in-and-of-themselves", otherwise create an engineID with the
* given string as text.
*
* If no engineID is given, lookup the first IP address for the
* localhost and use that (see setup_engineID()).
*/
if ( engineid && (tolower(*(engineid+1)) == 'x') ) {
engineid_len = hex_to_binary2( engineid+2,
strlen((char *)engineid)-2,
(char **) &engineid);
DEBUGMSGTL(("encode_keychange","engineIDLen: %d\n", engineid_len));
} else {
engineid_len = setup_engineID(&engineid, (char *)engineid);
}
#ifdef SNMP_TESTING_CODE
if (verbose) {
fprintf(stderr, "EngineID:\t%s\n",
/* XXX = */ dump_snmpEngineID(engineid, &engineid_len));
}
#endif
/*
* Get passphrases from user.
*/
rval = get_user_passphrases();
QUITFUN(rval, main_quit);
if ( strlen(oldpass) < USM_LENGTH_P_MIN ) {
fprintf(stderr, "Old passphrase must be greater than %d "
"characters in length.\n",
USM_LENGTH_P_MIN);
QUITFUN(rval = SNMPERR_GENERR, main_quit);
} else if ( strlen(newpass) < USM_LENGTH_P_MIN ) {
fprintf(stderr, "New passphrase must be greater than %d "
"characters in length.\n",
USM_LENGTH_P_MIN);
QUITFUN(rval = SNMPERR_GENERR, main_quit);
}
if (verbose) {
fprintf(stderr,
"Old passphrase:\t%s\nNew passphrase:\t%s\n",
oldpass, newpass);
}
/*
* Compute Ku and Kul's from old and new passphrases, then
* compute the keychange string & print it out.
*/
rval = sc_init();
QUITFUN(rval, main_quit);
rval = generate_Ku( transform_type, USM_LENGTH_OID_TRANSFORM,
(u_char *)oldpass, strlen(oldpass),
oldKu, &oldKu_len);
QUITFUN(rval, main_quit);
rval = generate_Ku( transform_type, USM_LENGTH_OID_TRANSFORM,
(u_char *)newpass, strlen(newpass),
newKu, &newKu_len);
QUITFUN(rval, main_quit);
DEBUGMSGTL(("encode_keychange", "EID (%d): ", engineid_len));
for(i=0; i < (int)engineid_len; i++)
DEBUGMSGTL(("encode_keychange", "%02x",(int) (engineid[i])));
DEBUGMSGTL(("encode_keychange","\n"));
DEBUGMSGTL(("encode_keychange", "old Ku (%d) (from %s): ", oldKu_len, oldpass));
for(i=0; i < (int)oldKu_len; i++)
DEBUGMSGTL(("encode_keychange", "%02x",(int) (oldKu[i])));
DEBUGMSGTL(("encode_keychange","\n"));
rval = generate_kul( transform_type, USM_LENGTH_OID_TRANSFORM,
engineid, engineid_len,
oldKu, oldKu_len,
oldkul, &oldkul_len);
QUITFUN(rval, main_quit);
DEBUGMSGTL(("encode_keychange", "generating old Kul (%d) (from Ku): ", oldkul_len));
for(i=0; i < (int)oldkul_len; i++)
DEBUGMSGTL(("encode_keychange", "%02x",(int) (oldkul[i])));
DEBUGMSGTL(("encode_keychange","\n"));
rval = generate_kul( transform_type, USM_LENGTH_OID_TRANSFORM,
engineid, engineid_len,
newKu, newKu_len,
newkul, &newkul_len);
QUITFUN(rval, main_quit);
DEBUGMSGTL(("encode_keychange", "generating new Kul (%d) (from Ku): ", oldkul_len));
for(i=0; i < (int)newkul_len; i++)
DEBUGMSGTL(("encode_keychange", "%02x",newkul[i]));
DEBUGMSGTL(("encode_keychange","\n"));
rval = encode_keychange(transform_type, USM_LENGTH_OID_TRANSFORM,
oldkul, oldkul_len,
newkul, newkul_len,
keychange, &keychange_len);
QUITFUN(rval, main_quit);
binary_to_hex(keychange, keychange_len, &s);
printf("%s%s\n",
(verbose) ? "KeyChange string:\t" : "", /* XXX stdout */
s);
/*
* Cleanup.
*/
main_quit:
snmp_call_callbacks(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_SHUTDOWN,
NULL);
SNMP_ZERO(oldpass, strlen(oldpass));
SNMP_ZERO(newpass, strlen(newpass));
SNMP_ZERO(oldKu, oldKu_len);
SNMP_ZERO(newKu, newKu_len);
SNMP_ZERO(oldkul, oldkul_len);
SNMP_ZERO(newkul, newkul_len);
SNMP_ZERO(s, strlen(s));
return rval;
} /* end main() */
void
send_enterprise_trap_vars(int trap,
int specific,
oid * enterprise, int enterprise_length,
netsnmp_variable_list * vars)
{
netsnmp_variable_list uptime_var, snmptrap_var, enterprise_var;
netsnmp_variable_list *v2_vars, *last_var = NULL;
netsnmp_pdu *template_pdu;
u_long uptime;
in_addr_t *pdu_in_addr_t;
struct trap_sink *sink;
#ifdef BRCM_SNMP_MIB_SUPPORT
oid temp_oid[MAX_OID_LEN];
#endif
/*
* Initialise SNMPv2 required variables
*/
uptime = netsnmp_get_agent_uptime();
memset(&uptime_var, 0, sizeof(netsnmp_variable_list));
snmp_set_var_objid(&uptime_var, sysuptime_oid,
OID_LENGTH(sysuptime_oid));
snmp_set_var_value(&uptime_var, (u_char *) & uptime, sizeof(uptime));
uptime_var.type = ASN_TIMETICKS;
uptime_var.next_variable = &snmptrap_var;
memset(&snmptrap_var, 0, sizeof(netsnmp_variable_list));
snmp_set_var_objid(&snmptrap_var, snmptrap_oid,
OID_LENGTH(snmptrap_oid));
/*
* value set later ....
*/
snmptrap_var.type = ASN_OBJECT_ID;
if (vars)
snmptrap_var.next_variable = vars;
else
snmptrap_var.next_variable = &enterprise_var;
/*
* find end of provided varbind list,
* ready to append the enterprise info if necessary
*/
last_var = vars;
while (last_var && last_var->next_variable)
last_var = last_var->next_variable;
memset(&enterprise_var, 0, sizeof(netsnmp_variable_list));
snmp_set_var_objid(&enterprise_var,
snmptrapenterprise_oid,
OID_LENGTH(snmptrapenterprise_oid));
snmp_set_var_value(&enterprise_var, (u_char *) enterprise,
enterprise_length * sizeof(oid));
enterprise_var.type = ASN_OBJECT_ID;
enterprise_var.next_variable = NULL;
v2_vars = &uptime_var;
/*
* Create a template PDU, ready for sending
*/
template_pdu = snmp_pdu_create(SNMP_MSG_TRAP);
if (template_pdu == NULL) {
/*
* Free memory if value stored dynamically
*/
snmp_set_var_value(&enterprise_var, NULL, 0);
return;
}
template_pdu->trap_type = trap;
template_pdu->specific_type = specific;
if (snmp_clone_mem((void **) &template_pdu->enterprise,
enterprise, enterprise_length * sizeof(oid))) {
snmp_free_pdu(template_pdu);
snmp_set_var_value(&enterprise_var, NULL, 0);
return;
}
template_pdu->enterprise_length = enterprise_length;
template_pdu->flags |= UCD_MSG_FLAG_FORCE_PDU_COPY;
pdu_in_addr_t = (in_addr_t *) template_pdu->agent_addr;
*pdu_in_addr_t = get_myaddr();
template_pdu->time = uptime;
/*
* Now use the parameters to determine
* which v2 variables are needed,
* and what values they should take.
*/
switch (trap) {
case -1: /*
* SNMPv2 only
* Check to see whether the variables provided
* are sufficient for SNMPv2 notifications
*/
if (vars && netsnmp_oid_equals(vars->name, vars->name_length,
sysuptime_oid,
OID_LENGTH(sysuptime_oid)) == 0)
v2_vars = vars;
else if (vars && netsnmp_oid_equals(vars->name, vars->name_length,
snmptrap_oid,
OID_LENGTH(snmptrap_oid)) == 0)
uptime_var.next_variable = vars;
else {
/*
* Hmmm... we don't seem to have a value - oops!
*/
snmptrap_var.next_variable = vars;
}
last_var = NULL; /* Don't need enterprise info */
convert_v2_to_v1(vars, template_pdu);
break;
/*
* "Standard" SNMPv1 traps
*/
case SNMP_TRAP_COLDSTART:
snmp_set_var_value(&snmptrap_var,
(u_char *) cold_start_oid,
sizeof(cold_start_oid));
break;
case SNMP_TRAP_WARMSTART:
snmp_set_var_value(&snmptrap_var,
(u_char *) warm_start_oid,
sizeof(warm_start_oid));
break;
case SNMP_TRAP_LINKDOWN:
snmp_set_var_value(&snmptrap_var,
(u_char *) link_down_oid,
sizeof(link_down_oid));
break;
case SNMP_TRAP_LINKUP:
snmp_set_var_value(&snmptrap_var,
(u_char *) link_up_oid, sizeof(link_up_oid));
break;
case SNMP_TRAP_AUTHFAIL:
if (snmp_enableauthentraps == SNMP_AUTHENTICATED_TRAPS_DISABLED) {
snmp_free_pdu(template_pdu);
snmp_set_var_value(&enterprise_var, NULL, 0);
return;
}
snmp_set_var_value(&snmptrap_var,
(u_char *) auth_fail_oid,
sizeof(auth_fail_oid));
break;
case SNMP_TRAP_EGPNEIGHBORLOSS:
snmp_set_var_value(&snmptrap_var,
(u_char *) egp_xxx_oid, sizeof(egp_xxx_oid));
break;
#ifdef BRCM_SNMP_MIB_SUPPORT
case SNMP_TRAP_ENTERPRISESPECIFIC:
memcpy(temp_oid,
(char *) enterprise, (enterprise_length) * sizeof(oid));
temp_oid[enterprise_length] = 0;
temp_oid[enterprise_length + 1] = specific;
snmp_set_var_value(&snmptrap_var,
(u_char *) temp_oid,
(enterprise_length + 2) * sizeof(oid));
snmptrap_var.next_variable = vars;
last_var = NULL; /* Don't need version info */
break;
#endif /* BRCM_SNMP_MIB_SUPPORT */
}
/*
* Now loop through the list of trap sinks,
* sending an appropriately formatted PDU to each
*/
for (sink = sinks; sink; sink = sink->next) {
if (sink->version == SNMP_VERSION_1 && trap == -1)
continue; /* Skip v1 sinks for v2 only traps */
template_pdu->command = sink->pdutype;
if (sink->version != SNMP_VERSION_1) {
template_pdu->variables = v2_vars;
if (last_var)
last_var->next_variable = &enterprise_var;
} else
template_pdu->variables = vars;
send_trap_to_sess(sink->sesp, template_pdu);
if (sink->version != SNMP_VERSION_1 && last_var)
last_var->next_variable = NULL;
}
/*
* send stuff to registered callbacks
*/
/*
* v2 traps/informs
*/
template_pdu->variables = v2_vars;
if (last_var)
last_var->next_variable = &enterprise_var;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_SEND_TRAP2, template_pdu);
if (last_var)
last_var->next_variable = NULL;
/*
* v1 traps
*/
template_pdu->command = SNMP_MSG_TRAP;
template_pdu->variables = vars;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_SEND_TRAP1, template_pdu);
/*
* Free memory if values stored dynamically
*/
snmp_set_var_value(&enterprise_var, NULL, 0);
snmp_set_var_value(&snmptrap_var, NULL, 0);
/*
* Ensure we don't free anything we shouldn't
*/
if (last_var)
last_var->next_variable = NULL;
template_pdu->variables = NULL;
snmp_free_pdu(template_pdu);
}
int
write_snmp(int action,
u_char * var_val,
u_char var_val_type,
size_t var_val_len, u_char * statP, oid * name, size_t name_len)
{
long intval = 0;
switch (action) {
case RESERVE1: /* Check values for acceptability */
if (var_val_type != ASN_INTEGER) {
DEBUGMSGTL(("mibII/snmp_mib", "%x not integer type",
var_val_type));
return SNMP_ERR_WRONGTYPE;
}
intval = *((long *) var_val);
if (intval != 1 && intval != 2) {
DEBUGMSGTL(("mibII/snmp_mib", "not valid %x\n", intval));
return SNMP_ERR_WRONGVALUE;
}
if (snmp_enableauthentrapsset < 0) {
/*
* The object is set in a read-only configuration file.
*/
return SNMP_ERR_NOTWRITABLE;
}
break;
case RESERVE2: /* Allocate memory and similar resources */
/*
* Using static variables, so nothing needs to be done
*/
break;
case ACTION: /* Perform the SET action (if reversible) */
/*
* Save the old value, in case of UNDO
*/
intval = *((long *) var_val);
old_snmp_enableauthentraps = snmp_enableauthentraps;
snmp_enableauthentraps = intval;
break;
case UNDO: /* Reverse the SET action and free resources */
snmp_enableauthentraps = old_snmp_enableauthentraps;
break;
case COMMIT:
snmp_enableauthentrapsset = 1;
snmp_save_persistent(netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPTYPE));
(void) snmp_call_callbacks(SNMP_CALLBACK_LIBRARY,
SNMP_CALLBACK_STORE_DATA, NULL);
snmp_clean_persistent(netsnmp_ds_get_string
(NETSNMP_DS_LIBRARY_ID, NETSNMP_DS_LIB_APPTYPE));
break;
case FREE: /* Free any resources allocated */
break;
}
return SNMP_ERR_NOERROR;
}
/*
* Open a session to the master agent.
*/
int
subagent_open_master_session(void)
{
netsnmp_session sess;
DEBUGMSGTL(("agentx/subagent", "opening session...\n"));
if (main_session) {
snmp_log(LOG_WARNING,
"AgentX session to master agent attempted to be re-opened.");
return -1;
}
snmp_sess_init(&sess);
sess.version = AGENTX_VERSION_1;
sess.retries = SNMP_DEFAULT_RETRIES;
sess.timeout = SNMP_DEFAULT_TIMEOUT;
sess.flags |= SNMP_FLAGS_STREAM_SOCKET;
if (netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_X_SOCKET)) {
sess.peername =
netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_X_SOCKET);
} else {
sess.peername = strdup(AGENTX_SOCKET);
}
sess.local_port = 0; /* client */
sess.remote_port = AGENTX_PORT; /* default port */
sess.callback = handle_agentx_packet;
sess.authenticator = NULL;
main_session = snmp_open_ex(&sess, NULL, agentx_parse, NULL, NULL,
agentx_realloc_build, agentx_check_packet);
if (main_session == NULL) {
/*
* Diagnose snmp_open errors with the input
* netsnmp_session pointer.
*/
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS)) {
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID, NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
netsnmp_sess_log_error(LOG_WARNING,
"Error: Failed to connect to the agentx master agent",
&sess);
} else {
snmp_sess_perror
("Error: Failed to connect to the agentx master agent",
&sess);
}
}
return -1;
}
if (agentx_open_session(main_session) < 0) {
snmp_close(main_session);
main_session = NULL;
return -1;
}
if (add_trap_session(main_session, AGENTX_MSG_NOTIFY, 1,
AGENTX_VERSION_1)) {
DEBUGMSGTL(("agentx/subagent", " trap session registered OK\n"));
} else {
DEBUGMSGTL(("agentx/subagent",
"trap session registration failed\n"));
snmp_close(main_session);
main_session = NULL;
return -1;
}
agentx_register_callbacks(main_session);
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_INDEX_START, (void *) main_session);
DEBUGMSGTL(("agentx/subagent", "opening session... DONE (%p)\n",
main_session));
return 0;
}
int
unregister_mib_range( oid *name, size_t len, int priority,
int range_subid, oid range_ubound)
{
struct subtree *list, *myptr;
struct subtree *prev, *child; /* loop through children */
struct register_parameters reg_parms;
list = find_subtree( name, len, subtrees );
if ( list == NULL )
return MIB_NO_SUCH_REGISTRATION;
for ( child=list, prev=NULL; child != NULL;
prev=child, child=child->children ) {
if (( snmp_oid_compare( child->name, child->namelen, name, len) == 0 )
&& ( child->priority == priority ))
break; /* found it */
}
if ( child == NULL )
return MIB_NO_SUCH_REGISTRATION;
unload_subtree( child, prev );
myptr = child; /* remember this for later */
/*
* Now handle any occurances in the following subtrees,
* as a result of splitting this range. Due to the
* nature of the way such splits work, the first
* subtree 'slice' that doesn't refer to the given
* name marks the end of the original region.
*
* This should also serve to register ranges.
*/
for ( list = myptr->next ; list != NULL ; list=list->next ) {
for ( child=list, prev=NULL; child != NULL;
prev=child, child=child->children ) {
if (( snmp_oid_compare( child->name, child->namelen,
name, len) == 0 )
&& ( child->priority == priority )) {
unload_subtree( child, prev );
free_subtree( child );
break;
}
}
if ( child == NULL ) /* Didn't find the given name */
break;
}
free_subtree( myptr );
reg_parms.name = name;
reg_parms.namelen = len;
reg_parms.priority = priority;
reg_parms.range_subid = range_subid;
reg_parms.range_ubound = range_ubound;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_UNREGISTER_OID,
®_parms);
return MIB_UNREGISTERED_OK;
}
int
register_mib_range(const char *moduleName,
struct variable *var,
size_t varsize,
size_t numvars,
oid *mibloc,
size_t mibloclen,
int priority,
int range_subid,
oid range_ubound,
struct snmp_session *ss)
{
struct subtree *subtree, *sub2;
int res, i;
struct register_parameters reg_parms;
subtree = (struct subtree *) malloc(sizeof(struct subtree));
if ( subtree == NULL )
return MIB_REGISTRATION_FAILED;
memset(subtree, 0, sizeof(struct subtree));
DEBUGMSGTL(("register_mib", "registering \"%s\" at ", moduleName));
DEBUGMSGOID(("register_mib", mibloc, mibloclen));
DEBUGMSG(("register_mib","\n"));
/*
* Create the new subtree node being registered
*/
memcpy(subtree->name, mibloc, mibloclen*sizeof(oid));
subtree->namelen = (u_char) mibloclen;
memcpy(subtree->start, mibloc, mibloclen*sizeof(oid));
subtree->start_len = (u_char) mibloclen;
memcpy(subtree->end, mibloc, mibloclen*sizeof(oid));
subtree->end[ mibloclen-1 ]++; /* XXX - or use 'variables' info ? */
subtree->end_len = (u_char) mibloclen;
memcpy(subtree->label, moduleName, strlen(moduleName)+1);
if ( var ) {
subtree->variables = (struct variable *) malloc(varsize*numvars);
memcpy(subtree->variables, var, numvars*varsize);
subtree->variables_len = numvars;
subtree->variables_width = varsize;
}
subtree->priority = priority;
subtree->session = ss;
res = load_subtree(subtree);
/*
* If registering a range,
* use the first subtree as a template
* for the rest of the range
*/
if (( res == MIB_REGISTERED_OK ) && ( range_subid != 0 )) {
for ( i = mibloc[range_subid-1] +1 ; i < (int)range_ubound ; i++ ) {
sub2 = (struct subtree *) malloc(sizeof(struct subtree));
if ( sub2 == NULL ) {
unregister_mib_range( mibloc, mibloclen, priority,
range_subid, range_ubound);
return MIB_REGISTRATION_FAILED;
}
memcpy( sub2, subtree, sizeof(struct subtree));
sub2->start[range_subid-1] = i;
sub2->end[ range_subid-1] = i; /* XXX - ???? */
res = load_subtree(sub2);
if ( res != MIB_REGISTERED_OK ) {
unregister_mib_range( mibloc, mibloclen, priority,
range_subid, range_ubound);
return MIB_REGISTRATION_FAILED;
}
}
}
reg_parms.name = mibloc;
reg_parms.namelen = mibloclen;
reg_parms.priority = priority;
reg_parms.range_subid = range_subid;
reg_parms.range_ubound = range_ubound;
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION, SNMPD_CALLBACK_REGISTER_OID,
®_parms);
return res;
}
/**
* This function allows you to make a distinction between generic
* traps from different classes of equipment. For example, you may want
* to handle a SNMP_TRAP_LINKDOWN trap for a particular device in a
* different manner to a generic system SNMP_TRAP_LINKDOWN trap.
*
*
* @param trap is the generic trap type. The trap types are:
* - SNMP_TRAP_COLDSTART:
* cold start
* - SNMP_TRAP_WARMSTART:
* warm start
* - SNMP_TRAP_LINKDOWN:
* link down
* - SNMP_TRAP_LINKUP:
* link up
* - SNMP_TRAP_AUTHFAIL:
* authentication failure
* - SNMP_TRAP_EGPNEIGHBORLOSS:
* egp neighbor loss
* - SNMP_TRAP_ENTERPRISESPECIFIC:
* enterprise specific
*
* @param specific is the specific trap value.
*
* @param enterprise is an enterprise oid in which you want to send specifc
* traps from.
*
* @param enterprise_length is the length of the enterprise oid, use macro,
* OID_LENGTH, to compute length.
*
* @param vars is used to supply list of variable bindings to form an SNMPv2
* trap.
*
* @param context currently unused
*
* @param flags currently unused
*
* @return void
*
* @see send_easy_trap
* @see send_v2trap
*/
int
netsnmp_send_traps(int trap, int specific,
oid * enterprise, int enterprise_length,
netsnmp_variable_list * vars,
char * context, int flags)
{
netsnmp_pdu *template_v1pdu;
netsnmp_pdu *template_v2pdu;
netsnmp_variable_list *vblist = NULL;
netsnmp_variable_list *trap_vb;
netsnmp_variable_list *var;
in_addr_t *pdu_in_addr_t;
u_long uptime;
struct trap_sink *sink;
DEBUGMSGTL(( "trap", "send_trap %d %d ", trap, specific));
DEBUGMSGOID(("trap", enterprise, enterprise_length));
DEBUGMSG(( "trap", "\n"));
if (vars) {
vblist = snmp_clone_varbind( vars );
if (!vblist) {
snmp_log(LOG_WARNING,
"send_trap: failed to clone varbind list\n");
return -1;
}
}
if ( trap == -1 ) {
/*
* Construct the SNMPv2-style notification PDU
*/
if (!vblist) {
snmp_log(LOG_WARNING,
"send_trap: called with NULL v2 information\n");
return -1;
}
template_v2pdu = snmp_pdu_create(SNMP_MSG_TRAP2);
if (!template_v2pdu) {
snmp_log(LOG_WARNING,
"send_trap: failed to construct v2 template PDU\n");
snmp_free_varbind(vblist);
return -1;
}
/*
* Check the varbind list we've been given.
* If it starts with a 'sysUptime.0' varbind, then use that.
* Otherwise, prepend a suitable 'sysUptime.0' varbind.
*/
if (!snmp_oid_compare( vblist->name, vblist->name_length,
sysuptime_oid, sysuptime_oid_len )) {
template_v2pdu->variables = vblist;
trap_vb = vblist->next_variable;
} else {
uptime = netsnmp_get_agent_uptime();
var = NULL;
snmp_varlist_add_variable( &var,
sysuptime_oid, sysuptime_oid_len,
ASN_TIMETICKS, (u_char*)&uptime, sizeof(uptime));
if (!var) {
snmp_log(LOG_WARNING,
"send_trap: failed to insert sysUptime varbind\n");
snmp_free_pdu(template_v2pdu);
snmp_free_varbind(vblist);
return -1;
}
template_v2pdu->variables = var;
var->next_variable = vblist;
trap_vb = vblist;
}
/*
* 'trap_vb' should point to the snmpTrapOID.0 varbind,
* identifying the requested trap. If not then bomb out.
* If it's a 'standard' trap, then we need to append an
* snmpEnterprise varbind (if there isn't already one).
*/
if (!trap_vb ||
snmp_oid_compare(trap_vb->name, trap_vb->name_length,
snmptrap_oid, snmptrap_oid_len)) {
snmp_log(LOG_WARNING,
"send_trap: no v2 trapOID varbind provided\n");
snmp_free_pdu(template_v2pdu);
return -1;
}
if (!snmp_oid_compare(vblist->val.objid, OID_LENGTH(trap_prefix),
trap_prefix, OID_LENGTH(trap_prefix))) {
var = find_varbind_in_list( template_v2pdu->variables,
snmptrapenterprise_oid,
snmptrapenterprise_oid_len);
if (!var &&
!snmp_varlist_add_variable( &(template_v2pdu->variables),
snmptrapenterprise_oid, snmptrapenterprise_oid_len,
ASN_OBJECT_ID,
(char*)enterprise, enterprise_length*sizeof(oid))) {
snmp_log(LOG_WARNING,
"send_trap: failed to add snmpEnterprise to v2 trap\n");
snmp_free_pdu(template_v2pdu);
return -1;
}
}
/*
* If everything's OK, convert the v2 template into an SNMPv1 trap PDU.
*/
template_v1pdu = convert_v2pdu_to_v1( template_v2pdu );
if (!template_v1pdu) {
snmp_log(LOG_WARNING,
"send_trap: failed to convert v2->v1 template PDU\n");
}
} else {
/*
* Construct the SNMPv1 trap PDU....
*/
template_v1pdu = snmp_pdu_create(SNMP_MSG_TRAP);
if (!template_v1pdu) {
snmp_log(LOG_WARNING,
"send_trap: failed to construct v1 template PDU\n");
snmp_free_varbind(vblist);
return -1;
}
template_v1pdu->trap_type = trap;
template_v1pdu->specific_type = specific;
template_v1pdu->time = netsnmp_get_agent_uptime();
if (snmp_clone_mem((void **) &template_v1pdu->enterprise,
enterprise, enterprise_length * sizeof(oid))) {
snmp_log(LOG_WARNING,
"send_trap: failed to set v1 enterprise OID\n");
snmp_free_varbind(vblist);
snmp_free_pdu(template_v1pdu);
return -1;
}
template_v1pdu->enterprise_length = enterprise_length;
template_v1pdu->flags |= UCD_MSG_FLAG_FORCE_PDU_COPY;
template_v1pdu->variables = vblist;
/*
* ... and convert it into an SNMPv2-style notification PDU.
*/
template_v2pdu = convert_v1pdu_to_v2( template_v1pdu );
if (!template_v2pdu) {
snmp_log(LOG_WARNING,
"send_trap: failed to convert v1->v2 template PDU\n");
}
}
/*
* Check whether we're ignoring authFail traps
*/
if (template_v1pdu) {
if (template_v1pdu->trap_type == SNMP_TRAP_AUTHFAIL &&
snmp_enableauthentraps == SNMP_AUTHENTICATED_TRAPS_DISABLED) {
snmp_free_pdu(template_v1pdu);
snmp_free_pdu(template_v2pdu);
return 0;
}
/*
* Ensure that the v1 trap PDU includes the local IP address
*/
pdu_in_addr_t = (in_addr_t *) template_v1pdu->agent_addr;
*pdu_in_addr_t = get_myaddr();
}
/*
* Now loop through the list of trap sinks
* and call the trap callback routines,
* providing an appropriately formatted PDU in each case
*/
for (sink = sinks; sink; sink = sink->next) {
#ifndef NETSNMP_DISABLE_SNMPV1
if (sink->version == SNMP_VERSION_1) {
if (template_v1pdu) {
send_trap_to_sess(sink->sesp, template_v1pdu);
}
} else {
#endif
if (template_v2pdu) {
template_v2pdu->command = sink->pdutype;
send_trap_to_sess(sink->sesp, template_v2pdu);
}
#ifndef NETSNMP_DISABLE_SNMPV1
}
#endif
}
if (template_v1pdu)
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_SEND_TRAP1, template_v1pdu);
if (template_v2pdu)
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_SEND_TRAP2, template_v2pdu);
snmp_free_pdu(template_v1pdu);
snmp_free_pdu(template_v2pdu);
return 0;
}
/** registers a row within a mib table */
int
netsnmp_register_mib_table_row(const char *moduleName,
struct variable *var,
size_t varsize,
size_t numvars,
oid * mibloc,
size_t mibloclen,
int priority,
int var_subid,
netsnmp_session * ss,
const char *context, int timeout, int flags)
{
unsigned int i = 0, rc = 0;
oid ubound = 0;
for (i = 0; i < numvars; i++) {
struct variable *vr =
(struct variable *) ((char *) var + (i * varsize));
netsnmp_handler_registration *r;
if ( var_subid > (int)mibloclen ) {
break; /* doesn't make sense */
}
r = SNMP_MALLOC_TYPEDEF(netsnmp_handler_registration);
if (r == NULL) {
/*
* Unregister whatever we have registered so far, and
* return an error.
*/
rc = MIB_REGISTRATION_FAILED;
break;
}
memset(r, 0, sizeof(netsnmp_handler_registration));
r->handler = get_old_api_handler();
r->handlerName = strdup(moduleName);
if (r->handlerName == NULL) {
netsnmp_handler_registration_free(r);
break;
}
r->rootoid_len = mibloclen;
r->rootoid = (oid *) malloc(r->rootoid_len * sizeof(oid));
if (r->rootoid == NULL) {
netsnmp_handler_registration_free(r);
rc = MIB_REGISTRATION_FAILED;
break;
}
memcpy(r->rootoid, mibloc, mibloclen * sizeof(oid));
memcpy((u_char *) (r->rootoid + (var_subid - vr->namelen)), vr->name,
vr->namelen * sizeof(oid));
DEBUGMSGTL(("netsnmp_register_mib_table_row", "rootoid "));
DEBUGMSGOID(("netsnmp_register_mib_table_row", r->rootoid,
r->rootoid_len));
DEBUGMSG(("netsnmp_register_mib_table_row", "(%d)\n",
(var_subid - vr->namelen)));
r->handler->myvoid = netsnmp_duplicate_variable(vr);
r->handler->data_clone = (void *(*)(void *))netsnmp_duplicate_variable;
r->handler->data_free = free;
if (r->handler->myvoid == NULL) {
netsnmp_handler_registration_free(r);
rc = MIB_REGISTRATION_FAILED;
break;
}
r->contextName = (context) ? strdup(context) : NULL;
if (context != NULL && r->contextName == NULL) {
netsnmp_handler_registration_free(r);
rc = MIB_REGISTRATION_FAILED;
break;
}
r->priority = priority;
r->range_subid = 0; /* var_subid; */
r->range_ubound = 0; /* range_ubound; */
r->timeout = timeout;
r->modes = HANDLER_CAN_RWRITE;
/*
* Register this column and row
*/
if ((rc =
netsnmp_register_handler_nocallback(r)) !=
MIB_REGISTERED_OK) {
DEBUGMSGTL(("netsnmp_register_mib_table_row",
"register failed %d\n", rc));
netsnmp_handler_registration_free(r);
break;
}
if (vr->namelen > 0) {
if (vr->name[vr->namelen - 1] > ubound) {
ubound = vr->name[vr->namelen - 1];
}
}
}
if (rc == MIB_REGISTERED_OK) {
struct register_parameters reg_parms;
reg_parms.name = mibloc;
reg_parms.namelen = mibloclen;
reg_parms.priority = priority;
reg_parms.flags = (u_char) flags;
reg_parms.range_subid = var_subid;
reg_parms.range_ubound = ubound;
reg_parms.timeout = timeout;
reg_parms.contextName = context;
rc = snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_REGISTER_OID, ®_parms);
}
return rc;
}
int
handle_agentx_packet(int operation, netsnmp_session * session, int reqid,
netsnmp_pdu *pdu, void *magic)
{
struct agent_netsnmp_set_info *asi = NULL;
snmp_callback mycallback;
netsnmp_pdu *internal_pdu = NULL;
void *retmagic = NULL;
ns_subagent_magic *smagic = NULL;
if (operation == NETSNMP_CALLBACK_OP_DISCONNECT) {
struct synch_state *state = (struct synch_state *) magic;
int period =
netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_PING_INTERVAL);
DEBUGMSGTL(("agentx/subagent",
"transport disconnect indication\n"));
/*
* deal with existing session. This happend if agentx sends
* a message to the master, but the master goes away before
* a response is sent. agentx will spin in snmp_synch_response_cb,
* waiting for a response. At the very least, the waiting
* flag must be set to break that loop. The rest is copied
* from disconnect handling in snmp_sync_input.
*/
if(state) {
state->waiting = 0;
state->pdu = NULL;
state->status = STAT_ERROR;
session->s_snmp_errno = SNMPERR_ABORT;
SET_SNMP_ERROR(SNMPERR_ABORT);
}
/*
* Deregister the ping alarm, if any, and invalidate all other
* references to this session.
*/
if (session->securityModel != SNMP_DEFAULT_SECMODEL) {
snmp_alarm_unregister(session->securityModel);
}
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_INDEX_STOP, (void *) session);
agentx_unregister_callbacks(session);
remove_trap_session(session);
register_mib_detach();
main_session = NULL;
if (period != 0) {
/*
* Pings are enabled, so periodically attempt to re-establish contact
* with the master agent. Don't worry about the handle,
* agentx_reopen_session unregisters itself if it succeeds in talking
* to the master agent.
*/
snmp_alarm_register(period, SA_REPEAT, agentx_reopen_session,
NULL);
}
return 0;
} else if (operation != NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE) {
DEBUGMSGTL(("agentx/subagent", "unexpected callback op %d\n",
operation));
return 1;
}
/*
* ok, we have a pdu from the net. Modify as needed
*/
DEBUGMSGTL(("agentx/subagent", "handling agentx request (req=0x%x,trans="
"0x%x,sess=0x%x)\n", pdu->reqid,pdu->transid, pdu->sessid));
pdu->version = AGENTX_VERSION_1;
pdu->flags |= UCD_MSG_FLAG_ALWAYS_IN_VIEW;
if (pdu->command == AGENTX_MSG_GET
|| pdu->command == AGENTX_MSG_GETNEXT
|| pdu->command == AGENTX_MSG_GETBULK) {
smagic =
(ns_subagent_magic *) calloc(1, sizeof(ns_subagent_magic));
if (smagic == NULL) {
DEBUGMSGTL(("agentx/subagent", "couldn't malloc() smagic\n"));
return 1;
}
smagic->original_command = pdu->command;
smagic->session = session;
smagic->ovars = NULL;
retmagic = (void *) smagic;
}
switch (pdu->command) {
case AGENTX_MSG_GET:
DEBUGMSGTL(("agentx/subagent", " -> get\n"));
pdu->command = SNMP_MSG_GET;
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_GETNEXT:
DEBUGMSGTL(("agentx/subagent", " -> getnext\n"));
pdu->command = SNMP_MSG_GETNEXT;
/*
* We have to save a copy of the original variable list here because
* if the master agent has requested scoping for some of the varbinds
* that information is stored there.
*/
smagic->ovars = snmp_clone_varbind(pdu->variables);
DEBUGMSGTL(("agentx/subagent", "saved variables\n"));
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_GETBULK:
/*
* WWWXXX
*/
DEBUGMSGTL(("agentx/subagent", " -> getbulk\n"));
pdu->command = SNMP_MSG_GETBULK;
/*
* We have to save a copy of the original variable list here because
* if the master agent has requested scoping for some of the varbinds
* that information is stored there.
*/
smagic->ovars = snmp_clone_varbind(pdu->variables);
DEBUGMSGTL(("agentx/subagent", "saved variables at %p\n",
smagic->ovars));
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_RESPONSE:
SNMP_FREE(smagic);
DEBUGMSGTL(("agentx/subagent", " -> response\n"));
return 1;
case AGENTX_MSG_TESTSET:
/*
* XXXWWW we have to map this twice to both RESERVE1 and RESERVE2
*/
DEBUGMSGTL(("agentx/subagent", " -> testset\n"));
asi = save_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "save_set_vars() failed\n");
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_RESERVE1;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_COMMITSET:
DEBUGMSGTL(("agentx/subagent", " -> commitset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
if (asi->mode != SNMP_MSG_INTERNAL_SET_RESERVE2) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING,
"dropping bad AgentX request (wrong mode %d)\n",
asi->mode);
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_ACTION;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_CLEANUPSET:
DEBUGMSGTL(("agentx/subagent", " -> cleanupset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
if (asi->mode == SNMP_MSG_INTERNAL_SET_RESERVE1 ||
asi->mode == SNMP_MSG_INTERNAL_SET_RESERVE2) {
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_FREE;
} else if (asi->mode == SNMP_MSG_INTERNAL_SET_ACTION) {
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_COMMIT;
} else {
snmp_log(LOG_WARNING,
"dropping bad AgentX request (wrong mode %d)\n",
asi->mode);
SNMP_FREE(retmagic);
return 1;
}
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_UNDOSET:
DEBUGMSGTL(("agentx/subagent", " -> undoset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_UNDO;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
default:
SNMP_FREE(smagic);
DEBUGMSGTL(("agentx/subagent", " -> unknown command %d (%02x)\n",
pdu->command, pdu->command));
return 0;
}
/*
* submit the pdu to the internal handler
*/
/*
* We have to clone the PDU here, because when we return from this
* callback, sess_process_packet will free(pdu), but this call also
* free()s its argument PDU.
*/
internal_pdu = snmp_clone_pdu(pdu);
internal_pdu->contextName = internal_pdu->community;
internal_pdu->contextNameLen = internal_pdu->community_len;
internal_pdu->community = NULL;
internal_pdu->community_len = 0;
snmp_async_send(agentx_callback_sess, internal_pdu, mycallback,
retmagic);
return 1;
}
/*
* Open a session to the master agent.
*/
int
subagent_open_master_session(void)
{
netsnmp_transport *t;
netsnmp_session sess;
DEBUGMSGTL(("agentx/subagent", "opening session...\n"));
if (main_session) {
snmp_log(LOG_WARNING,
"AgentX session to master agent attempted to be re-opened.");
return -1;
}
snmp_sess_init(&sess);
sess.version = AGENTX_VERSION_1;
sess.retries = SNMP_DEFAULT_RETRIES;
sess.timeout = SNMP_DEFAULT_TIMEOUT;
sess.flags |= SNMP_FLAGS_STREAM_SOCKET;
sess.callback = handle_agentx_packet;
sess.authenticator = NULL;
t = netsnmp_transport_open_client(
"agentx", netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET));
if (t == NULL) {
/*
* Diagnose snmp_open errors with the input
* netsnmp_session pointer.
*/
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS)) {
char buf[1024];
const char *socket =
netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET);
snprintf(buf, sizeof(buf), "Warning: "
"Failed to connect to the agentx master agent (%s)",
socket ? socket : "[NIL]");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
netsnmp_sess_log_error(LOG_WARNING, buf, &sess);
} else {
snmp_sess_perror(buf, &sess);
}
}
return -1;
}
main_session =
snmp_add_full(&sess, t, NULL, agentx_parse, NULL, NULL,
agentx_realloc_build, agentx_check_packet, NULL);
if (main_session == NULL) {
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_CONNECTION_WARNINGS)) {
char buf[1024];
snprintf(buf, sizeof(buf), "Error: "
"Failed to create the agentx master agent session (%s)",
netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET));
snmp_sess_perror(buf, &sess);
}
netsnmp_transport_free(t);
return -1;
}
/*
* I don't know why 1 is success instead of the usual 0 = noerr,
* but that's what the function returns.
*/
if (1 != agentx_open_session(main_session)) {
snmp_close(main_session);
main_session = NULL;
return -1;
}
if (add_trap_session(main_session, AGENTX_MSG_NOTIFY, 1,
AGENTX_VERSION_1)) {
DEBUGMSGTL(("agentx/subagent", " trap session registered OK\n"));
} else {
DEBUGMSGTL(("agentx/subagent",
"trap session registration failed\n"));
snmp_close(main_session);
main_session = NULL;
return -1;
}
agentx_register_callbacks(main_session);
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_INDEX_START, (void *) main_session);
snmp_log(LOG_INFO, "NET-SNMP version %s AgentX subagent connected\n",
netsnmp_get_version());
DEBUGMSGTL(("agentx/subagent", "opening session... DONE (%p)\n",
main_session));
return 0;
}