/** create a new row in the table */
static void
register_foreach(const struct sysORTable* data, void* dummy)
{
sysORTable_entry *entry;
sysORLastChange = data->OR_uptime;
entry = SNMP_MALLOC_TYPEDEF(sysORTable_entry);
if (!entry) {
snmp_log(LOG_ERR,
"could not allocate storage, sysORTable is inconsistent\n");
} else {
const oid firstNext = sysORNextIndex;
netsnmp_iterator* it = CONTAINER_ITERATOR(table);
do {
const sysORTable_entry* value;
const oid cur = sysORNextIndex;
if (sysORNextIndex == SNMP_MIN(MAX_SUBID, 2147483647UL))
sysORNextIndex = 1;
else
++sysORNextIndex;
for (value = (sysORTable_entry*)it->curr(it);
value && value->sysORIndex < cur;
value = (sysORTable_entry*)ITERATOR_NEXT(it)) {
}
if (value && value->sysORIndex == cur) {
if (sysORNextIndex < cur)
it->reset(it);
} else {
entry->sysORIndex = cur;
break;
}
} while (firstNext != sysORNextIndex);
ITERATOR_RELEASE(it);
if(firstNext == sysORNextIndex) {
snmp_log(LOG_ERR, "Failed to locate a free index in sysORTable\n");
free(entry);
} else {
entry->data = data;
entry->oid_index.len = 1;
entry->oid_index.oids = &entry->sysORIndex;
CONTAINER_INSERT(table, entry);
}
}
}
netsnmp_variable_list *
collect(netsnmp_session * ss, netsnmp_pdu *pdu,
oid * base, size_t base_length)
{
netsnmp_pdu *response;
int running = 1;
netsnmp_variable_list *saved = NULL, **vlpp = &saved;
int status;
while (running) {
/*
* gotta catch em all, gotta catch em all!
*/
status = snmp_synch_response(ss, pdu, &response);
if (status != STAT_SUCCESS || !response) {
snmp_sess_perror("snmpdf", ss);
exit(1);
}
if (response->errstat != SNMP_ERR_NOERROR) {
fprintf(stderr, "snmpdf: Error in packet: %s\n",
snmp_errstring(response->errstat));
exit(1);
}
if (response && snmp_oid_compare(response->variables->name,
SNMP_MIN(base_length,
response->variables->
name_length), base,
base_length) != 0)
running = 0;
else {
/*
* get response
*/
*vlpp = response->variables;
(*vlpp)->next_variable = NULL; /* shouldn't be any, but just in case */
/*
* create the next request
*/
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
snmp_add_null_var(pdu, (*vlpp)->name, (*vlpp)->name_length);
/*
* finish loop setup
*/
vlpp = &((*vlpp)->next_variable);
response->variables = NULL; /* ahh, forget about it */
}
snmp_free_pdu(response);
}
return saved;
}
/** register a given data_set at a given oid (specified in the
netsnmp_handler_registration pointer). The
reginfo->handler->access_method *may* be null if the call doesn't
ever want to be called for SNMP operations.
*/
int
netsnmp_register_table_data_set(netsnmp_handler_registration *reginfo,
netsnmp_table_data_set *data_set,
netsnmp_table_registration_info *table_info)
{
int ret;
if (NULL == table_info) {
/*
* allocate the table if one wasn't allocated
*/
table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
if (table_info == NULL)
return SNMP_ERR_GENERR;
}
if (NULL == table_info->indexes && data_set->table->indexes_template) {
/*
* copy the indexes in
*/
table_info->indexes =
snmp_clone_varbind(data_set->table->indexes_template);
}
if ((!table_info->min_column || !table_info->max_column) &&
(data_set->default_row)) {
/*
* determine min/max columns
*/
unsigned int mincol = 0xffffffff, maxcol = 0;
netsnmp_table_data_set_storage *row;
for (row = data_set->default_row; row; row = row->next) {
mincol = SNMP_MIN(mincol, row->column);
maxcol = SNMP_MAX(maxcol, row->column);
}
if (!table_info->min_column)
table_info->min_column = mincol;
if (!table_info->max_column)
table_info->max_column = maxcol;
}
netsnmp_inject_handler(reginfo,
netsnmp_get_table_data_set_handler(data_set));
ret = netsnmp_register_table_data(reginfo, data_set->table,
table_info);
if (reginfo->handler)
netsnmp_handler_owns_table_info(reginfo->handler->next);
return ret;
}
/*******************************************************************-o-******
* snmp_comstr_parse
*
* Parameters:
* *data (I) Message.
* *length (I/O) Bytes left in message.
* *psid (O) Community string.
* *slen (O) Length of community string.
* *version (O) Message version.
*
* Returns:
* Pointer to the remainder of data.
*
*
* Parse the header of a community string-based message such as that found
* in SNMPv1 and SNMPv2c.
*/
u_char *
snmp_comstr_parse(u_char * data,
size_t * length,
u_char * psid, size_t * slen, long *version)
{
u_char type;
long ver;
size_t origlen = *slen;
/*
* Message is an ASN.1 SEQUENCE.
*/
data = asn_parse_sequence(data, length, &type,
(ASN_SEQUENCE | ASN_CONSTRUCTOR),
"auth message");
if (data == NULL) {
return NULL;
}
/*
* First field is the version.
*/
DEBUGDUMPHEADER("recv", "SNMP version");
data = asn_parse_int(data, length, &type, &ver, sizeof(ver));
DEBUGINDENTLESS();
*version = ver;
if (data == NULL) {
ERROR_MSG("bad parse of version");
return NULL;
}
/*
* second field is the community string for SNMPv1 & SNMPv2c
*/
DEBUGDUMPHEADER("recv", "community string");
data = asn_parse_string(data, length, &type, psid, slen);
DEBUGINDENTLESS();
if (data == NULL) {
ERROR_MSG("bad parse of community");
return NULL;
}
psid[SNMP_MIN(*slen, origlen - 1)] = '\0';
return (u_char *) data;
} /* end snmp_comstr_parse() */
_KEYTOOLS_NOT_AVAILABLE
#endif /* internal or openssl */
/*******************************************************************-o-******
* encode_keychange
*
* Parameters:
* *hashtype MIB OID for the hash transform type.
* hashtype_len Length of the MIB OID hash transform type.
* *oldkey Old key that is used to encodes the new key.
* oldkey_len Length of oldkey in bytes.
* *newkey New key that is encoded using the old key.
* newkey_len Length of new key in bytes.
* *kcstring Buffer to contain the KeyChange TC string.
* *kcstring_len Length of kcstring buffer.
*
* Returns:
* SNMPERR_SUCCESS Success.
* SNMPERR_GENERR All errors.
*
*
* Uses oldkey and acquired random bytes to encode newkey into kcstring
* according to the rules of the KeyChange TC described in RFC 2274, Section 5.
*
* Upon successful return, *kcstring_len contains the length of the
* encoded string.
*
* ASSUMES Old and new key are always equal to each other, although
* this may be less than the transform type hash output
* output length (eg, using KeyChange for a DESPriv key when
* the user also uses SHA1Auth). This also implies that the
* hash placed in the second 1/2 of the key change string
* will be truncated before the XOR'ing when the hash output is
* larger than that 1/2 of the key change string.
*
* *kcstring_len will be returned as exactly twice that same
* length though the input buffer may be larger.
*
* XXX FIX: Does not handle varibable length keys.
* XXX FIX: Does not handle keys larger than the hash algorithm used.
*/
int
encode_keychange( oid *hashtype, u_int hashtype_len,
u_char *oldkey, size_t oldkey_len,
u_char *newkey, size_t newkey_len,
u_char *kcstring, size_t *kcstring_len)
#if defined(USE_OPENSSL) || defined(USE_INTERNAL_MD5)
{
int rval = SNMPERR_SUCCESS;
size_t properlength;
size_t nbytes = 0;
u_char *tmpbuf = NULL;
void *context = NULL;
/*
* Sanity check.
*/
if ( !hashtype || !oldkey || !newkey || !kcstring || !kcstring_len
|| (oldkey_len<=0) || (newkey_len<=0) || (*kcstring_len<=0)
|| (hashtype_len != USM_LENGTH_OID_TRANSFORM) )
{
QUITFUN(SNMPERR_GENERR, encode_keychange_quit);
}
/*
* Setup for the transform type.
*/
properlength = sc_get_properlength(hashtype, hashtype_len);
if (properlength == SNMPERR_GENERR)
QUITFUN(SNMPERR_GENERR, encode_keychange_quit);
if ( (oldkey_len != newkey_len) || (*kcstring_len < (2*oldkey_len)) )
{
QUITFUN(SNMPERR_GENERR, encode_keychange_quit);
}
properlength = SNMP_MIN((int)oldkey_len, properlength);
/*
* Use the old key and some random bytes to encode the new key
* in the KeyChange TC format:
* . Get random bytes (store in first half of kcstring),
* . Hash (oldkey | random_bytes) (into second half of kcstring),
* . XOR hash and newkey (into second half of kcstring).
*
* Getting the wrong number of random bytes is considered an error.
*/
nbytes = properlength;
#if defined(SNMP_TESTING_CODE) && defined(RANDOMZEROS)
memset(kcstring, 0, nbytes);
DEBUGMSG(("encode_keychange",
"** Using all zero bits for \"random\" delta of )"
"the keychange string! **\n"));
#else /* !SNMP_TESTING_CODE */
rval = sc_random(kcstring, &nbytes);
QUITFUN(rval, encode_keychange_quit);
if ((int)nbytes != properlength) {
QUITFUN(SNMPERR_GENERR, encode_keychange_quit);
}
#endif /* !SNMP_TESTING_CODE */
tmpbuf = (u_char *)malloc(properlength*2);
if (tmpbuf) {
memcpy(tmpbuf, oldkey, properlength);
memcpy(tmpbuf+properlength, kcstring, properlength);
*kcstring_len -= properlength;
rval = sc_hash(hashtype, hashtype_len, tmpbuf, properlength*2,
kcstring+properlength, kcstring_len);
QUITFUN(rval, encode_keychange_quit);
*kcstring_len = (properlength*2);
kcstring += properlength;
nbytes = 0;
while ((int)(nbytes++) < properlength) {
*kcstring++ = *kcstring ^ *newkey++;
}
}
encode_keychange_quit:
if (rval != SNMPERR_SUCCESS) memset(kcstring, 0, *kcstring_len);
SNMP_FREE(tmpbuf);
SNMP_FREE(context);
return rval;
} /* end encode_keychange() */
int
unregister_index(netsnmp_variable_list * varbind, int remember,
netsnmp_session * ss)
{
struct snmp_index *idxptr, *idxptr2;
struct snmp_index *prev_oid_ptr, *prev_idx_ptr;
int res, res2, i;
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(TESTING)
if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE) == SUB_AGENT) {
return (agentx_unregister_index(ss, varbind));
}
#endif
/*
* Look for the requested OID entry
*/
prev_oid_ptr = NULL;
prev_idx_ptr = NULL;
res = 1;
res2 = 1;
for (idxptr = snmp_index_head; idxptr != NULL;
prev_oid_ptr = idxptr, idxptr = idxptr->next_oid) {
if ((res = snmp_oid_compare(varbind->name, varbind->name_length,
idxptr->varbind->name,
idxptr->varbind->name_length)) <= 0)
break;
}
if (res != 0)
return INDEX_ERR_NOT_ALLOCATED;
if (varbind->type != idxptr->varbind->type)
return INDEX_ERR_WRONG_TYPE;
for (idxptr2 = idxptr; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
switch (varbind->type) {
case ASN_INTEGER:
res2 =
(*varbind->val.integer -
*idxptr2->varbind->val.integer);
break;
case ASN_OCTET_STR:
i = SNMP_MIN(varbind->val_len,
idxptr2->varbind->val_len);
res2 =
memcmp(varbind->val.string,
idxptr2->varbind->val.string, i);
break;
case ASN_OBJECT_ID:
res2 =
snmp_oid_compare(varbind->val.objid,
varbind->val_len / sizeof(oid),
idxptr2->varbind->val.objid,
idxptr2->varbind->val_len /
sizeof(oid));
break;
default:
return INDEX_ERR_WRONG_TYPE; /* wrong type */
}
if (res2 <= 0)
break;
}
if (res2 != 0 || (res2 == 0 && !idxptr2->allocated)) {
return INDEX_ERR_NOT_ALLOCATED;
}
if (ss != idxptr2->session)
return INDEX_ERR_WRONG_SESSION;
/*
* If this is a "normal" index unregistration,
* mark the index entry as unused, but leave
* it in situ. This allows differentiation
* between ANY_INDEX and NEW_INDEX
*/
if (remember) {
idxptr2->allocated = 0; /* Unused index */
idxptr2->session = NULL;
return SNMP_ERR_NOERROR;
}
/*
* If this is a failed attempt to register a
* number of indexes, the successful ones
* must be removed completely.
*/
if (prev_idx_ptr) {
prev_idx_ptr->next_idx = idxptr2->next_idx;
} else if (prev_oid_ptr) {
if (idxptr2->next_idx) /* Use p_idx_ptr as a temp variable */
prev_idx_ptr = idxptr2->next_idx;
else
prev_idx_ptr = idxptr2->next_oid;
while (prev_oid_ptr) {
prev_oid_ptr->next_oid = prev_idx_ptr;
prev_oid_ptr = prev_oid_ptr->next_idx;
}
} else {
if (idxptr2->next_idx)
snmp_index_head = idxptr2->next_idx;
else
snmp_index_head = idxptr2->next_oid;
}
snmp_free_var(idxptr2->varbind);
free(idxptr2);
return SNMP_ERR_NOERROR;
}
netsnmp_variable_list *
register_index(netsnmp_variable_list * varbind, int flags,
netsnmp_session * ss)
{
netsnmp_variable_list *rv = NULL;
struct snmp_index *new_index, *idxptr, *idxptr2;
struct snmp_index *prev_oid_ptr, *prev_idx_ptr;
int res, res2, i;
DEBUGMSGTL(("register_index", "register "));
DEBUGMSGVAR(("register_index", varbind));
DEBUGMSG(("register_index", "for session %8p\n", ss));
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(TESTING)
if (netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE) == SUB_AGENT) {
return (agentx_register_index(ss, varbind, flags));
}
#endif
/*
* Look for the requested OID entry
*/
prev_oid_ptr = NULL;
prev_idx_ptr = NULL;
res = 1;
res2 = 1;
for (idxptr = snmp_index_head; idxptr != NULL;
prev_oid_ptr = idxptr, idxptr = idxptr->next_oid) {
if ((res = snmp_oid_compare(varbind->name, varbind->name_length,
idxptr->varbind->name,
idxptr->varbind->name_length)) <= 0)
break;
}
/*
* Found the OID - now look at the registered indices
*/
if (res == 0 && idxptr) {
if (varbind->type != idxptr->varbind->type)
return NULL; /* wrong type */
/*
* If we've been asked for an arbitrary new value,
* then find the end of the list.
* If we've been asked for any arbitrary value,
* then look for an unused entry, and use that.
* If there aren't any, continue as for new.
* Otherwise, locate the given value in the (sorted)
* list of already allocated values
*/
if (flags & ALLOCATE_ANY_INDEX) {
for (idxptr2 = idxptr; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
if (flags == ALLOCATE_ANY_INDEX && !(idxptr2->allocated)) {
if ((rv =
snmp_clone_varbind(idxptr2->varbind)) != NULL) {
idxptr2->session = ss;
idxptr2->allocated = 1;
}
return rv;
}
}
} else {
for (idxptr2 = idxptr; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
switch (varbind->type) {
case ASN_INTEGER:
res2 =
(*varbind->val.integer -
*idxptr2->varbind->val.integer);
break;
case ASN_OCTET_STR:
i = SNMP_MIN(varbind->val_len,
idxptr2->varbind->val_len);
res2 =
memcmp(varbind->val.string,
idxptr2->varbind->val.string, i);
break;
case ASN_OBJECT_ID:
res2 =
snmp_oid_compare(varbind->val.objid,
varbind->val_len / sizeof(oid),
idxptr2->varbind->val.objid,
idxptr2->varbind->val_len /
sizeof(oid));
break;
default:
return NULL; /* wrong type */
}
if (res2 <= 0)
break;
}
if (res2 == 0) {
if (idxptr2->allocated) {
/*
* No good: the index is in use.
*/
return NULL;
} else {
/*
* Okay, it's unallocated, we can just claim ownership
* here.
*/
if ((rv =
snmp_clone_varbind(idxptr2->varbind)) != NULL) {
idxptr2->session = ss;
idxptr2->allocated = 1;
}
return rv;
}
}
}
}
/*
* OK - we've now located where the new entry needs to
* be fitted into the index registry tree
* To recap:
* 'prev_oid_ptr' points to the head of the OID index
* list prior to this one. If this is null, then
* it means that this is the first OID in the list.
* 'idxptr' points either to the head of this OID list,
* or the next OID (if this is a new OID request)
* These can be distinguished by the value of 'res'.
*
* 'prev_idx_ptr' points to the index entry that sorts
* immediately prior to the requested value (if any).
* If an arbitrary value is required, then this will
* point to the last allocated index.
* If this pointer is null, then either this is a new
* OID request, or the requested value is the first
* in the list.
* 'idxptr2' points to the next sorted index (if any)
* but is not actually needed any more.
*
* Clear? Good!
* I hope you've been paying attention.
* There'll be a test later :-)
*/
/*
* We proceed by creating the new entry
* (by copying the entry provided)
*/
new_index = (struct snmp_index *) calloc(1, sizeof(struct snmp_index));
if (new_index == NULL)
return NULL;
if (NULL == snmp_varlist_add_variable(&new_index->varbind,
varbind->name,
varbind->name_length,
varbind->type,
varbind->val.string,
varbind->val_len)) {
/*
* if (snmp_clone_var( varbind, new_index->varbind ) != 0 )
*/
free(new_index);
return NULL;
}
new_index->session = ss;
new_index->allocated = 1;
if (varbind->type == ASN_OCTET_STR && flags == ALLOCATE_THIS_INDEX)
new_index->varbind->val.string[new_index->varbind->val_len] = 0;
/*
* If we've been given a value, then we can use that, but
* otherwise, we need to create a new value for this entry.
* Note that ANY_INDEX and NEW_INDEX are both covered by this
* test (since NEW_INDEX & ANY_INDEX = ANY_INDEX, remember?)
*/
if (flags & ALLOCATE_ANY_INDEX) {
if (prev_idx_ptr) {
if (snmp_clone_var(prev_idx_ptr->varbind, new_index->varbind)
!= 0) {
free(new_index);
return NULL;
}
} else
new_index->varbind->val.string = new_index->varbind->buf;
switch (varbind->type) {
case ASN_INTEGER:
if (prev_idx_ptr) {
(*new_index->varbind->val.integer)++;
} else
*(new_index->varbind->val.integer) = 1;
new_index->varbind->val_len = sizeof(long);
break;
case ASN_OCTET_STR:
if (prev_idx_ptr) {
i = new_index->varbind->val_len - 1;
while (new_index->varbind->buf[i] == 'z') {
new_index->varbind->buf[i] = 'a';
i--;
if (i < 0) {
i = new_index->varbind->val_len;
new_index->varbind->buf[i] = 'a';
new_index->varbind->buf[i + 1] = 0;
}
}
new_index->varbind->buf[i]++;
} else
strcpy((char *) new_index->varbind->buf, "aaaa");
new_index->varbind->val_len =
strlen((char *) new_index->varbind->buf);
break;
case ASN_OBJECT_ID:
if (prev_idx_ptr) {
i = prev_idx_ptr->varbind->val_len / sizeof(oid) - 1;
while (new_index->varbind->val.objid[i] == 255) {
new_index->varbind->val.objid[i] = 1;
i--;
if (i == 0 && new_index->varbind->val.objid[0] == 2) {
new_index->varbind->val.objid[0] = 1;
i = new_index->varbind->val_len / sizeof(oid);
new_index->varbind->val.objid[i] = 0;
new_index->varbind->val_len += sizeof(oid);
}
}
new_index->varbind->val.objid[i]++;
} else {
/*
* If the requested OID name is small enough,
* * append another OID (1) and use this as the
* * default starting value for new indexes.
*/
if ((varbind->name_length + 1) * sizeof(oid) <= 40) {
for (i = 0; i < (int) varbind->name_length; i++)
new_index->varbind->val.objid[i] =
varbind->name[i];
new_index->varbind->val.objid[varbind->name_length] =
1;
new_index->varbind->val_len =
(varbind->name_length + 1) * sizeof(oid);
} else {
/*
* Otherwise use '.1.1.1.1...'
*/
i = 40 / sizeof(oid);
if (i > 4)
i = 4;
new_index->varbind->val_len = i * (sizeof(oid));
for (i--; i >= 0; i--)
new_index->varbind->val.objid[i] = 1;
}
}
break;
default:
snmp_free_var(new_index->varbind);
free(new_index);
return NULL; /* Index type not supported */
}
}
/*
* Try to duplicate the new varbind for return.
*/
if ((rv = snmp_clone_varbind(new_index->varbind)) == NULL) {
snmp_free_var(new_index->varbind);
free(new_index);
return NULL;
}
/*
* Right - we've set up the new entry.
* All that remains is to link it into the tree.
* There are a number of possible cases here,
* so watch carefully.
*/
if (prev_idx_ptr) {
new_index->next_idx = prev_idx_ptr->next_idx;
new_index->next_oid = prev_idx_ptr->next_oid;
prev_idx_ptr->next_idx = new_index;
} else {
if (res == 0 && idxptr) {
new_index->next_idx = idxptr;
new_index->next_oid = idxptr->next_oid;
} else {
new_index->next_idx = NULL;
new_index->next_oid = idxptr;
}
if (prev_oid_ptr) {
while (prev_oid_ptr) {
prev_oid_ptr->next_oid = new_index;
prev_oid_ptr = prev_oid_ptr->next_idx;
}
} else
snmp_index_head = new_index;
}
return rv;
}
int
unregister_index(struct variable_list *varbind, int remember, struct snmp_session *ss)
{
struct snmp_index *idxptr, *idxptr2;
struct snmp_index *prev_oid_ptr, *prev_idx_ptr;
int res, res2, i;
#if defined(USING_AGENTX_SUBAGENT_MODULE) && !defined(TESTING)
if (ds_get_boolean(DS_APPLICATION_ID, DS_AGENT_ROLE) == SUB_AGENT )
return( agentx_unregister_index( ss, varbind ));
#endif
/* Look for the requested OID entry */
prev_oid_ptr = NULL;
prev_idx_ptr = NULL;
res = 1;
res2 = 1;
for( idxptr = snmp_index_head ; idxptr != NULL;
prev_oid_ptr = idxptr, idxptr = idxptr->next_oid) {
if ((res = snmp_oid_compare(varbind->name, varbind->name_length,
idxptr->varbind.name,
idxptr->varbind.name_length)) <= 0 )
break;
}
if ( res != 0 )
return INDEX_ERR_NOT_ALLOCATED;
if ( varbind->type != idxptr->varbind.type )
return INDEX_ERR_WRONG_TYPE;
for(idxptr2 = idxptr ; idxptr2 != NULL;
prev_idx_ptr = idxptr2, idxptr2 = idxptr2->next_idx) {
i = SNMP_MIN(varbind->val_len, idxptr2->varbind.val_len);
res2 = memcmp(varbind->val.string, idxptr2->varbind.val.string, i);
if ( res2 <= 0 )
break;
}
if ( res2 != 0 )
return INDEX_ERR_NOT_ALLOCATED;
if ( ss != idxptr2->session )
return INDEX_ERR_WRONG_SESSION;
/*
* If this is a "normal" index unregistration,
* mark the index entry as unused, but leave
* it in situ. This allows differentiation
* between ANY_INDEX and NEW_INDEX
*/
if ( remember ) {
idxptr2->session = NULL; /* Unused index */
return SNMP_ERR_NOERROR;
}
/*
* If this is a failed attempt to register a
* number of indexes, the successful ones
* must be removed completely.
*/
if ( prev_idx_ptr ) {
prev_idx_ptr->next_idx = idxptr2->next_idx;
}
else if ( prev_oid_ptr ) {
if ( idxptr2->next_idx ) /* Use p_idx_ptr as a temp variable */
prev_idx_ptr = idxptr2->next_idx;
else
prev_idx_ptr = idxptr2->next_oid;
while ( prev_oid_ptr ) {
prev_oid_ptr->next_oid = prev_idx_ptr;
prev_oid_ptr = prev_oid_ptr->next_idx;
}
}
else {
if ( idxptr2->next_idx )
snmp_index_head = idxptr2->next_idx;
else
snmp_index_head = idxptr2->next_oid;
}
snmp_free_var( (struct variable_list *)idxptr2 );
return SNMP_ERR_NOERROR;
}
/** @internal */
void
netsnmp_config_parse_table_set(const char *token, char *line)
{
oid name[MAX_OID_LEN], table_name[MAX_OID_LEN];
size_t name_length = MAX_OID_LEN, table_name_length =
MAX_OID_LEN;
struct tree *tp, *indexnode;
netsnmp_table_data_set *table_set;
data_set_tables *tables;
struct index_list *index;
unsigned int mincol = 0xffffff, maxcol = 0;
u_char type;
char *pos;
/*
* instatiate a fake table based on MIB information
*/
DEBUGMSGTL(("9:table_set_add_table", "processing '%s'\n", line));
if (NULL != (pos = strchr(line,' '))) {
config_pwarn("ignoring extra tokens on line");
snmp_log(LOG_WARNING," ignoring '%s'\n", pos);
*pos = '\0';
}
/*
* check for duplicate table
*/
tables = (data_set_tables *) netsnmp_get_list_data(auto_tables, line);
if (NULL != tables) {
config_pwarn("duplicate table definition");
return;
}
/*
* parse oid and find tree structure
*/
if (!snmp_parse_oid(line, table_name, &table_name_length)) {
config_pwarn
("can't instatiate table since I can't parse the table name");
return;
}
if(NULL == (tp = get_tree(table_name, table_name_length,
get_tree_head()))) {
config_pwarn("can't instatiate table since "
"I can't find mib information about it");
return;
}
if (NULL == (tp = tp->child_list) || NULL == tp->child_list) {
config_pwarn("can't instatiate table since it doesn't appear to be "
"a proper table (no children)");
return;
}
/*
* check for augments indexes
*/
if (NULL != tp->augments) {
if (!snmp_parse_oid(tp->augments, table_name, &table_name_length)) {
config_pwarn("I can't parse the augment tabel name");
snmp_log(LOG_WARNING, " can't parse %s\n", tp->augments);
return;
}
if(NULL == (tp = get_tree(table_name, table_name_length,
get_tree_head()))) {
config_pwarn("can't instatiate table since "
"I can't find mib information about augment table");
snmp_log(LOG_WARNING, " table %s not found in tree\n",
tp->augments);
return;
}
table_set = netsnmp_create_table_data_set(line);
/*
* loop through indexes and add types
*/
for (index = tp->indexes; index; index = index->next) {
if (!snmp_parse_oid(index->ilabel, name, &name_length) ||
(NULL ==
(indexnode = get_tree(name, name_length, get_tree_head())))) {
config_pwarn("can't instatiate table since "
"I don't know anything about one index");
snmp_log(LOG_WARNING, " index %s not found in tree\n",
index->ilabel);
return; /* xxx mem leak */
}
type = mib_to_asn_type(indexnode->type);
if (type == (u_char) - 1) {
config_pwarn("unknown index type");
return; /* xxx mem leak */
}
if (index->isimplied) /* if implied, mark it as such */
type |= ASN_PRIVATE;
DEBUGMSGTL(("table_set_add_row",
"adding default index of type %d\n", type));
netsnmp_table_dataset_add_index(table_set, type);
}
}
else
table_set = netsnmp_create_table_data_set(line);
/*
* loop through indexes and add types
*/
for (index = tp->indexes; index; index = index->next) {
if (!snmp_parse_oid(index->ilabel, name, &name_length) ||
(NULL ==
(indexnode = get_tree(name, name_length, get_tree_head())))) {
config_pwarn("can't instatiate table since "
"I don't know anything about one index");
snmp_log(LOG_WARNING, " index %s not found in tree\n",
index->ilabel);
return; /* xxx mem leak */
}
type = mib_to_asn_type(indexnode->type);
if (type == (u_char) - 1) {
config_pwarn("unknown index type");
return; /* xxx mem leak */
}
if (index->isimplied) /* if implied, mark it as such */
type |= ASN_PRIVATE;
DEBUGMSGTL(("table_set_add_row",
"adding default index of type %d\n", type));
netsnmp_table_dataset_add_index(table_set, type);
}
/*
* loop through children and add each column info
*/
for (tp = tp->child_list; tp; tp = tp->next_peer) {
int canwrite = 0;
type = mib_to_asn_type(tp->type);
if (type == (u_char) - 1) {
config_pwarn("unknown column type");
return; /* xxx mem leak */
}
DEBUGMSGTL(("table_set_add_row",
"adding column %s(%d) of type %d (access %d)\n",
tp->label, tp->subid, type, tp->access));
switch (tp->access) {
case MIB_ACCESS_CREATE:
table_set->allow_creation = 1;
case MIB_ACCESS_READWRITE:
case MIB_ACCESS_WRITEONLY:
canwrite = 1;
case MIB_ACCESS_READONLY:
DEBUGMSGTL(("table_set_add_row",
"adding column %d of type %d\n", tp->subid, type));
netsnmp_table_set_add_default_row(table_set, tp->subid, type,
canwrite, NULL, 0);
mincol = SNMP_MIN(mincol, tp->subid);
maxcol = SNMP_MAX(maxcol, tp->subid);
break;
case MIB_ACCESS_NOACCESS:
case MIB_ACCESS_NOTIFY:
break;
default:
config_pwarn("unknown column access type");
break;
}
}
/*
* register the table
*/
netsnmp_register_table_data_set(netsnmp_create_handler_registration
(line, NULL, table_name,
table_name_length,
HANDLER_CAN_RWRITE), table_set, NULL);
netsnmp_register_auto_data_table(table_set, NULL);
}
/*
* The helper handler that takes care of passing a specific row of
* data down to the lower handler(s). It sets request->processed if
* the request should not be handled.
*/
int
netsnmp_table_data_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_table_data *table = (netsnmp_table_data *) handler->myvoid;
netsnmp_request_info *request;
int valid_request = 0;
netsnmp_table_row *row;
netsnmp_table_request_info *table_info;
netsnmp_table_registration_info *table_reg_info =
netsnmp_find_table_registration_info(reginfo);
int result, regresult;
int oldmode;
for (request = requests; request; request = request->next) {
if (request->processed)
continue;
table_info = netsnmp_extract_table_info(request);
if (!table_info)
continue; /* ack */
switch (reqinfo->mode) {
case MODE_GET:
case MODE_GETNEXT:
case MODE_SET_RESERVE1:
netsnmp_request_add_list_data(request,
netsnmp_create_data_list(
TABLE_DATA_TABLE, table, NULL));
}
/*
* find the row in question
*/
switch (reqinfo->mode) {
case MODE_GETNEXT:
case MODE_GETBULK: /* XXXWWW */
if (request->requestvb->type != ASN_NULL)
continue;
/*
* loop through data till we find the next row
*/
result = snmp_oid_compare(request->requestvb->name,
request->requestvb->name_length,
reginfo->rootoid,
reginfo->rootoid_len);
regresult = snmp_oid_compare(request->requestvb->name,
SNMP_MIN(request->requestvb->
name_length,
reginfo->rootoid_len),
reginfo->rootoid,
reginfo->rootoid_len);
if (regresult == 0
&& request->requestvb->name_length < reginfo->rootoid_len)
regresult = -1;
if (result < 0 || 0 == result) {
/*
* before us entirely, return the first
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 1 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the entry
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 2 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the column
*/
row = table->first_row;
} else {
/*
* loop through all rows looking for the first one
* that is equal to the request or greater than it
*/
for (row = table->first_row; row; row = row->next) {
/*
* compare the index of the request to the row
*/
result =
snmp_oid_compare(row->index_oid,
row->index_oid_len,
request->requestvb->name + 2 +
reginfo->rootoid_len,
request->requestvb->name_length -
2 - reginfo->rootoid_len);
if (result == 0) {
/*
* equal match, return the next row
*/
if (row) {
row = row->next;
}
break;
} else if (result > 0) {
/*
* the current row is greater than the
* request, use it
*/
break;
}
}
}
if (!row) {
table_info->colnum++;
if (table_info->colnum <= table_reg_info->max_column) {
row = table->first_row;
}
}
if (row) {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
/*
* Set the name appropriately, so we can pass this
* request on as a simple GET request
*/
netsnmp_table_data_build_result(reginfo, reqinfo, request,
row,
table_info->colnum,
ASN_NULL, NULL, 0);
} else { /* no decent result found. Give up. It's beyond us. */
request->processed = 1;
}
break;
case MODE_GET:
if (request->requestvb->type != ASN_NULL)
continue;
/*
* find the row in question
*/
if (request->requestvb->name_length < (reginfo->rootoid_len + 3)) { /* table.entry.column... */
/*
* request too short
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else if (NULL ==
(row =
netsnmp_table_data_get_from_oid(table,
request->
requestvb->name +
reginfo->
rootoid_len + 2,
request->
requestvb->
name_length -
reginfo->
rootoid_len -
2))) {
/*
* no such row
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
}
break;
case MODE_SET_RESERVE1:
valid_request = 1;
if (NULL !=
(row =
netsnmp_table_data_get_from_oid(table,
request->requestvb->name +
reginfo->rootoid_len + 2,
request->requestvb->
name_length -
reginfo->rootoid_len -
2))) {
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_ROW, row,
NULL));
}
break;
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_FREE:
case MODE_SET_UNDO:
valid_request = 1;
}
}
if (valid_request &&
(reqinfo->mode == MODE_GETNEXT || reqinfo->mode == MODE_GETBULK)) {
/*
* If this is a GetNext or GetBulk request, then we've identified
* the row that ought to include the appropriate next instance.
* Convert the request into a Get request, so that the lower-level
* handlers don't need to worry about skipping on, and call these
* handlers ourselves (so we can undo this again afterwards).
*/
oldmode = reqinfo->mode;
reqinfo->mode = MODE_GET;
result = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
reqinfo->mode = oldmode;
handler->flags |= MIB_HANDLER_AUTO_NEXT_OVERRIDE_ONCE;
return result;
}
else
/* next handler called automatically - 'AUTO_NEXT' */
return SNMP_ERR_NOERROR;
}
/** @internal Implements the stash_to_next handler */
int
netsnmp_stash_to_next_helper(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
int ret = SNMP_ERR_NOERROR;
int namelen;
int finished = 0;
netsnmp_oid_stash_node **cinfo;
netsnmp_variable_list *vb;
netsnmp_request_info *reqtmp;
/*
* this code depends on AUTO_NEXT being set
*/
netsnmp_assert(handler->flags & MIB_HANDLER_AUTO_NEXT);
/*
* Don't do anything for any modes except GET_STASH. Just return,
* and the agent will call the next handler (AUTO_NEXT).
*
* If the handler chain already supports GET_STASH, we don't
* need to do anything here either. Once again, we just return
* and the agent will call the next handler (AUTO_NEXT).
*
* Otherwise, we munge the mode to GET_NEXT, and call the
* next handler ourselves, repeatedly until we've retrieved the
* full contents of the table or subtree.
* Then restore the mode and return to the calling handler
* (setting AUTO_NEXT_OVERRRIDE so the agent knows what we did).
*/
if (MODE_GET_STASH == reqinfo->mode) {
if ( reginfo->modes & HANDLER_CAN_STASH ) {
return ret;
}
cinfo = netsnmp_extract_stash_cache( reqinfo );
reqtmp = SNMP_MALLOC_TYPEDEF(netsnmp_request_info);
vb = reqtmp->requestvb = SNMP_MALLOC_TYPEDEF( netsnmp_variable_list );
vb->type = ASN_NULL;
snmp_set_var_objid( vb, reginfo->rootoid, reginfo->rootoid_len );
reqinfo->mode = MODE_GETNEXT;
while (!finished) {
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo, reqtmp);
namelen = SNMP_MIN(vb->name_length, reginfo->rootoid_len);
if ( !snmp_oid_compare( reginfo->rootoid, reginfo->rootoid_len,
vb->name, namelen) &&
vb->type != ASN_NULL && vb->type != SNMP_ENDOFMIBVIEW ) {
/*
* This result is relevant so save it, and prepare
* the request varbind for the next query.
*/
netsnmp_oid_stash_add_data( cinfo, vb->name, vb->name_length,
snmp_clone_varbind( vb ));
/*
* Tidy up the response structure,
* ready for retrieving the next entry
*/
netsnmp_free_all_list_data(reqtmp->parent_data);
reqtmp->parent_data = NULL;
reqtmp->processed = 0;
vb->type = ASN_NULL;
} else {
finished = 1;
}
}
reqinfo->mode = MODE_GET_STASH;
/*
* let the handler chain processing know that we've already
* called the next handler
*/
handler->flags |= MIB_HANDLER_AUTO_NEXT_OVERRIDE_ONCE;
}
return ret;
}
/*******************************************************************-o-******
* test_keychange
*
* Returns:
* Number of failures.
*
*
* Test of KeyChange TC implementation.
*
* ASSUME newkey and oldkey begin as NULL terminated strings.
*/
int
test_keychange(void)
{
int rval = SNMPERR_SUCCESS,
failcount = 0,
properlength = BYTESIZE(SNMP_TRANS_AUTHLEN_HMACMD5),
oldkey_len,
newkey_len,
keychange_len,
temp_len, isdefault_new = FALSE, isdefault_old = FALSE;
char *hashname = "usmHMACMD5AuthProtocol.", *s;
u_char oldkey_buf[LOCAL_MAXBUF],
newkey_buf[LOCAL_MAXBUF],
temp_buf[LOCAL_MAXBUF], keychange_buf[LOCAL_MAXBUF];
oid *hashtype = usmHMACMD5AuthProtocol;
OUTPUT("Test of KeyChange TC --");
/*
* Set newkey and oldkey.
*/
if (!newkey) { /* newkey */
newkey = NEWKEY_DEFAULT;
isdefault_new = TRUE;
}
newkey_len = strlen(newkey);
if (tolower(*(newkey + 1)) == 'x') {
newkey_len = hex_to_binary2(newkey + 2, newkey_len - 2, &s);
if (newkey_len < 0) {
FAILED((rval = SNMPERR_GENERR),
"Could not resolve hex newkey.");
}
newkey = s;
binary_to_hex(newkey, newkey_len, &s);
}
if (!oldkey) { /* oldkey */
oldkey = OLDKEY_DEFAULT;
isdefault_old = TRUE;
}
oldkey_len = strlen(oldkey);
if (tolower(*(oldkey + 1)) == 'x') {
oldkey_len = hex_to_binary2(oldkey + 2, oldkey_len - 2, &s);
if (oldkey_len < 0) {
FAILED((rval = SNMPERR_GENERR),
"Could not resolve hex oldkey.");
}
oldkey = s;
binary_to_hex(oldkey, oldkey_len, &s);
}
test_keychange_again:
memset(oldkey_buf, 0, LOCAL_MAXBUF);
memset(newkey_buf, 0, LOCAL_MAXBUF);
memset(keychange_buf, 0, LOCAL_MAXBUF);
memset(temp_buf, 0, LOCAL_MAXBUF);
memcpy(oldkey_buf, oldkey, SNMP_MIN(oldkey_len, properlength));
memcpy(newkey_buf, newkey, SNMP_MIN(newkey_len, properlength));
keychange_len = LOCAL_MAXBUF;
binary_to_hex(oldkey_buf, properlength, &s);
fprintf(stdout, "\noldkey%s (len=%d): %s\n",
(isdefault_old) ? " (default)" : "", properlength, s);
SNMP_FREE(s);
binary_to_hex(newkey_buf, properlength, &s);
fprintf(stdout, "newkey%s (len=%d): %s\n\n",
(isdefault_new) ? " (default)" : "", properlength, s);
SNMP_FREE(s);
rval = encode_keychange(hashtype, USM_LENGTH_OID_TRANSFORM,
oldkey_buf, properlength,
newkey_buf, properlength,
keychange_buf, &keychange_len);
FAILED(rval, "encode_keychange().");
if (keychange_len != (properlength * 2)) {
FAILED(SNMPERR_GENERR,
"KeyChange string (encoded) is not proper length "
"for this hash transform.");
}
binary_to_hex(keychange_buf, keychange_len, &s);
fprintf(stdout, "(%s) KeyChange string: %s\n\n",
((hashtype == usmHMACMD5AuthProtocol) ? "MD5" : "SHA"), s);
SNMP_FREE(s);
temp_len = properlength;
rval = decode_keychange(hashtype, USM_LENGTH_OID_TRANSFORM,
oldkey_buf, properlength,
keychange_buf, properlength * 2,
temp_buf, &temp_len);
FAILED(rval, "decode_keychange().");
if (temp_len != properlength) {
FAILED(SNMPERR_GENERR,
"decoded newkey is not proper length for "
"this hash transform.");
}
binary_to_hex(temp_buf, temp_len, &s);
fprintf(stdout, "decoded newkey: %s\n\n", s);
SNMP_FREE(s);
if (memcmp(newkey_buf, temp_buf, temp_len)) {
FAILED(SNMPERR_GENERR, "newkey did not decode properly.");
}
SUCCESS(hashname);
fprintf(stdout, "\n");
/*
* Multiplex different test combinations.
*
* First clause is for Test #2, second clause is for (last) Test #3.
*/
if (hashtype == usmHMACMD5AuthProtocol) {
hashtype = usmHMACSHA1AuthProtocol;
hashname = "usmHMACSHA1AuthProtocol (w/DES length kul's).";
properlength = BYTESIZE(SNMP_TRANS_PRIVLEN_1DES)
+ BYTESIZE(SNMP_TRANS_PRIVLEN_1DES_IV);
goto test_keychange_again;
} else if (properlength < BYTESIZE(SNMP_TRANS_AUTHLEN_HMACSHA1)) {
hashtype = usmHMACSHA1AuthProtocol;
hashname = "usmHMACSHA1AuthProtocol.";
properlength = BYTESIZE(SNMP_TRANS_AUTHLEN_HMACSHA1);
goto test_keychange_again;
}
return failcount;
} /* end test_keychange() */
int
netsnmp_scalar_group_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_variable_list *var = requests->requestvb;
netsnmp_scalar_group *sgroup = (netsnmp_scalar_group *)handler->myvoid;
int ret, cmp;
int namelen;
oid subid, root_tmp[MAX_OID_LEN], *root_save;
DEBUGMSGTL(("helper:scalar_group", "Got request:\n"));
namelen = SNMP_MIN(requests->requestvb->name_length,
reginfo->rootoid_len);
cmp = snmp_oid_compare(requests->requestvb->name, namelen,
reginfo->rootoid, reginfo->rootoid_len);
DEBUGMSGTL(( "helper:scalar_group", " cmp=%d, oid:", cmp));
DEBUGMSGOID(("helper:scalar_group", var->name, var->name_length));
DEBUGMSG(( "helper:scalar_group", "\n"));
/*
* copy root oid to root_tmp, set instance to 0. (subid set later on)
* save rootoid, since we'll replace it before calling next handler,
* and need to restore it afterwards.
*/
memcpy(root_tmp, reginfo->rootoid, reginfo->rootoid_len * sizeof(oid));
root_tmp[reginfo->rootoid_len + 1] = 0;
root_save = reginfo->rootoid;
ret = SNMP_ERR_NOCREATION;
switch (reqinfo->mode) {
/*
* The handling of "exact" requests is basically the same.
* The only difference between GET and SET requests is the
* error/exception to return on failure.
*/
case MODE_GET:
ret = SNMP_NOSUCHOBJECT;
/* Fallthrough */
#ifndef NETSNMP_NO_WRITE_SUPPORT
case MODE_SET_RESERVE1:
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_UNDO:
case MODE_SET_FREE:
#endif /* NETSNMP_NO_WRITE_SUPPORT */
if (cmp != 0 ||
requests->requestvb->name_length <= reginfo->rootoid_len) {
/*
* Common prefix doesn't match, or only *just* matches
* the registered root (so can't possibly match a scalar)
*/
netsnmp_set_request_error(reqinfo, requests, ret);
return SNMP_ERR_NOERROR;
} else {
/*
* Otherwise,
* extract the object subidentifier from the request,
* check this is (probably) valid, and then fudge the
* registered 'rootoid' to match, before passing the
* request off to the next handler ('scalar').
*
* Note that we don't bother checking instance subidentifiers
* here. That's left to the scalar helper.
*/
subid = requests->requestvb->name[reginfo->rootoid_len];
if (subid < sgroup->lbound ||
subid > sgroup->ubound) {
netsnmp_set_request_error(reqinfo, requests, ret);
return SNMP_ERR_NOERROR;
}
root_tmp[reginfo->rootoid_len] = subid;
reginfo->rootoid_len += 2;
reginfo->rootoid = root_tmp;
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
reginfo->rootoid = root_save;
reginfo->rootoid_len -= 2;
return ret;
}
break;
case MODE_GETNEXT:
/*
* If we're being asked for something before (or exactly matches)
* the registered root OID, then start with the first object.
* If we're being asked for something that exactly matches an object
* OID, then that's what we pass down.
* Otherwise, we pass down the OID of the *next* object....
*/
if (cmp < 0 ||
requests->requestvb->name_length <= reginfo->rootoid_len) {
subid = sgroup->lbound;
} else if (requests->requestvb->name_length == reginfo->rootoid_len+1)
subid = requests->requestvb->name[reginfo->rootoid_len];
else
subid = requests->requestvb->name[reginfo->rootoid_len]+1;
/*
* ... always assuming this is (potentially) valid, of course.
*/
if (subid < sgroup->lbound)
subid = sgroup->lbound;
else if (subid > sgroup->ubound)
return SNMP_ERR_NOERROR;
root_tmp[reginfo->rootoid_len] = subid;
reginfo->rootoid_len += 2;
reginfo->rootoid = root_tmp;
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
/*
* If we didn't get an answer (due to holes in the group)
* set things up to retry again.
*/
if (!requests->delegated &&
(requests->requestvb->type == ASN_NULL ||
requests->requestvb->type == SNMP_NOSUCHOBJECT ||
requests->requestvb->type == SNMP_NOSUCHINSTANCE)) {
snmp_set_var_objid(requests->requestvb,
reginfo->rootoid, reginfo->rootoid_len - 1);
requests->requestvb->name[reginfo->rootoid_len - 2] = ++subid;
requests->requestvb->type = ASN_PRIV_RETRY;
}
reginfo->rootoid = root_save;
reginfo->rootoid_len -= 2;
return ret;
}
/*
* got here only if illegal mode found
*/
return SNMP_ERR_GENERR;
}
/**
* The helper handler that takes care of passing a specific row of
* data down to the lower handler(s). It sets request->processed if
* the request should not be handled.
*/
int
netsnmp_table_data_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_table_data *table = (netsnmp_table_data *) handler->myvoid;
netsnmp_request_info *request;
int valid_request = 0;
netsnmp_table_row *row;
netsnmp_table_request_info *table_info;
netsnmp_table_registration_info *table_reg_info =
netsnmp_find_table_registration_info(reginfo);
int result, regresult;
int oldmode;
for (request = requests; request; request = request->next) {
if (request->processed)
continue;
table_info = netsnmp_extract_table_info(request);
if (!table_info)
continue; /* ack */
/*
* find the row in question
*/
switch (reqinfo->mode) {
case MODE_GETNEXT:
case MODE_GETBULK: /* XXXWWW */
if (request->requestvb->type != ASN_NULL)
continue;
/*
* loop through data till we find the next row
*/
result = snmp_oid_compare(request->requestvb->name,
request->requestvb->name_length,
reginfo->rootoid,
reginfo->rootoid_len);
regresult = snmp_oid_compare(request->requestvb->name,
SNMP_MIN(request->requestvb->
name_length,
reginfo->rootoid_len),
reginfo->rootoid,
reginfo->rootoid_len);
if (regresult == 0
&& request->requestvb->name_length < reginfo->rootoid_len)
regresult = -1;
if (result < 0 || 0 == result) {
/*
* before us entirely, return the first
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 1 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the entry
*/
row = table->first_row;
table_info->colnum = table_reg_info->min_column;
} else if (regresult == 0 && request->requestvb->name_length ==
reginfo->rootoid_len + 2 &&
/* entry node must be 1, but any column is ok */
request->requestvb->name[reginfo->rootoid_len] == 1) {
/*
* exactly to the column
*/
row = table->first_row;
} else {
/*
* loop through all rows looking for the first one
* that is equal to the request or greater than it
*/
for (row = table->first_row; row; row = row->next) {
/*
* compare the index of the request to the row
*/
result =
snmp_oid_compare(row->index_oid,
row->index_oid_len,
request->requestvb->name + 2 +
reginfo->rootoid_len,
request->requestvb->name_length -
2 - reginfo->rootoid_len);
if (result == 0) {
/*
* equal match, return the next row
*/
if (row) {
row = row->next;
}
break;
} else if (result > 0) {
/*
* the current row is greater than the
* request, use it
*/
break;
}
}
}
if (!row) {
table_info->colnum++;
if (table_info->colnum <= table_reg_info->max_column) {
row = table->first_row;
}
}
if (row) {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
/*
* Set the name appropriately, so we can pass this
* request on as a simple GET request
*/
netsnmp_table_data_build_result(reginfo, reqinfo, request,
row,
table_info->colnum,
ASN_NULL, NULL, 0);
} else { /* no decent result found. Give up. It's beyond us. */
request->processed = 1;
}
break;
case MODE_GET:
if (request->requestvb->type != ASN_NULL)
continue;
/*
* find the row in question
*/
if (request->requestvb->name_length < (reginfo->rootoid_len + 3)) { /* table.entry.column... */
/*
* request too short
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else if (NULL ==
(row =
netsnmp_table_data_get_from_oid(table,
request->
requestvb->name +
reginfo->
rootoid_len + 2,
request->
requestvb->
name_length -
reginfo->
rootoid_len -
2))) {
/*
* no such row
*/
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
break;
} else {
valid_request = 1;
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
}
break;
case MODE_SET_RESERVE1:
valid_request = 1;
if (NULL !=
(row =
netsnmp_table_data_get_from_oid(table,
request->requestvb->name +
reginfo->rootoid_len + 2,
request->requestvb->
name_length -
reginfo->rootoid_len -
2))) {
netsnmp_request_add_list_data(request,
netsnmp_create_data_list
(TABLE_DATA_NAME, row,
NULL));
}
break;
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_FREE:
case MODE_SET_UNDO:
valid_request = 1;
}
}
if (valid_request) {
/*
* If this is a GetNext or GetBulk request, then we've identified
* the row that ought to include the appropriate next instance.
* Convert the request into a Get request, so that the lower-level
* handlers don't need to worry about skipping on....
*/
oldmode = reqinfo->mode;
if (reqinfo->mode == MODE_GETNEXT || reqinfo->mode == MODE_GETBULK) {
reqinfo->mode = MODE_GET;
}
result = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
if (oldmode == MODE_GETNEXT || oldmode == MODE_GETBULK) { /* XXX */
for (request = requests; request; request = request->next) {
/*
* ... but if the lower-level handlers aren't dealing with
* skipping on to the next instance, then we must handle
* this situation here.
* Mark 'holes' in the table as needing to be retried.
*
* This approach is less efficient than handling such
* holes directly in the table_dataset handler, but allows
* user-provided handlers to override the dataset handler
* if this proves necessary.
*/
if (request->requestvb->type == ASN_NULL ||
request->requestvb->type == SNMP_NOSUCHINSTANCE) {
request->requestvb->type = ASN_PRIV_RETRY;
}
/* XXX - Move on to the next object */
if (request->requestvb->type == SNMP_NOSUCHOBJECT) {
request->requestvb->type = ASN_PRIV_RETRY;
}
}
reqinfo->mode = oldmode;
}
return result;
}
else
return SNMP_ERR_NOERROR;
}
int
netsnmp_scalar_helper_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_variable_list *var = requests->requestvb;
int ret, cmp;
int namelen;
DEBUGMSGTL(("helper:scalar", "Got request:\n"));
namelen = SNMP_MIN(requests->requestvb->name_length,
reginfo->rootoid_len);
cmp = snmp_oid_compare(requests->requestvb->name, namelen,
reginfo->rootoid, reginfo->rootoid_len);
DEBUGMSGTL(("helper:scalar", " oid:", cmp));
DEBUGMSGOID(("helper:scalar", var->name, var->name_length));
DEBUGMSG(("helper:scalar", "\n"));
switch (reqinfo->mode) {
case MODE_GET:
if (cmp != 0) {
netsnmp_set_request_error(reqinfo, requests,
SNMP_NOSUCHOBJECT);
return SNMP_ERR_NOERROR;
} else {
reginfo->rootoid[reginfo->rootoid_len++] = 0;
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
reginfo->rootoid_len--;
return ret;
}
break;
case MODE_SET_RESERVE1:
case MODE_SET_RESERVE2:
case MODE_SET_ACTION:
case MODE_SET_COMMIT:
case MODE_SET_UNDO:
case MODE_SET_FREE:
if (cmp != 0) {
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_NOCREATION);
return SNMP_ERR_NOERROR;
} else {
reginfo->rootoid[reginfo->rootoid_len++] = 0;
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo,
requests);
reginfo->rootoid_len--;
return ret;
}
break;
case MODE_GETNEXT:
reginfo->rootoid[reginfo->rootoid_len++] = 0;
ret = netsnmp_call_next_handler(handler, reginfo, reqinfo, requests);
reginfo->rootoid_len--;
return ret;
}
/*
* got here only if illegal mode found
*/
return SNMP_ERR_GENERR;
}
