void add_responses(struct variable_list *vars, struct oid_value ***next_ov, oid *name, size_t *name_length) {
int found = 0;
for (struct variable_list *var = vars; var; var = var->next_variable) {
if (var->name_length < PRINTER_OID_LEN ||
0 != netsnmp_oid_equals(PRINTER_OID, PRINTER_OID_LEN, var->name, PRINTER_OID_LEN)) {
// This OID does not have the printer OID prefix, so we're done.
*name_length = 0;
return;
}
oid *objid = malloc(var->name_length * sizeof(oid));
memmove(objid, var->name, var->name_length * sizeof(oid));
size_t value_length = 1, out_length = 0;;
char *value = malloc(value_length);
sprint_realloc_value((unsigned char **)&value, &value_length, &out_length, 1, var->name, var->name_length, var);
**next_ov = calloc(1, sizeof(struct oid_value));
(**next_ov)->name = objid;
(**next_ov)->name_length = var->name_length;
(**next_ov)->value = value;
*next_ov = &(**next_ov)->next;
*name_length = var->name_length;
memmove(name, var->name, *name_length * sizeof(oid));
}
return;
}
/*! \fn void snmp_snprint_value(char *obuf, size_t buf_len, const oid *objid, size_t objidlen, struct variable_list *variable)
*
* \brief replacement for the buggy net-snmp.org snprint_value function
*
* This function format an output buffer with the correct string representation
* of an snmp OID result fetched with snmp_get_multi. The buffer pointed to by
* the function is modified.
*
*/
void snmp_snprint_value(char *obuf, size_t buf_len, const oid *objid, size_t objidlen, struct variable_list *variable) {
u_char *buf = NULL;
size_t out_len = 0;
if ((buf = (u_char *) calloc(buf_len, 1)) != 0) {
if (sprint_realloc_value(&buf, &buf_len, &out_len, 1,
objid, objidlen, variable)) {
snprintf(obuf, buf_len, "%s", buf);
}else{
snprintf(obuf, buf_len, "%s [TRUNCATED]", buf);
}
}else{
SET_UNDEFINED(obuf);
}
free(buf);
}
/*
* Store data received in response PDU
*/
int print_result (int status, req_t *req, struct snmp_pdu *pdu)
{
struct variable_list *vp;
size_t len;
keyrecord_t *kwalk;
int keyoidlen;
oid_t *owalk;
int done;
switch (status) {
case STAT_SUCCESS:
if (pdu->errstat == SNMP_ERR_NOERROR) {
unsigned char *valstr = NULL, *oidstr = NULL;
size_t valsz = 0, oidsz = 0;
okcount++;
switch (dataoperation) {
case GET_KEYS:
/*
* Find the keyrecord currently processed for this request, and
* look through the unresolved keys to see if we have a match.
* If we do, determine the index for data retrieval.
*/
vp = pdu->variables;
len = 0; sprint_realloc_value(&valstr, &valsz, &len, 1, vp->name, vp->name_length, vp);
len = 0; sprint_realloc_objid(&oidstr, &oidsz, &len, 1, vp->name, vp->name_length);
dbgprintf("Got key-oid '%s' = '%s'\n", oidstr, valstr);
for (kwalk = req->currentkey, done = 0; (kwalk && !done); kwalk = kwalk->next) {
/* Skip records where we have the result already, or that are not keyed */
if (kwalk->indexoid || (kwalk->indexmethod != req->currentkey->indexmethod)) {
continue;
}
keyoidlen = strlen(req->currentkey->indexmethod->keyoid);
switch (kwalk->indexmethod->idxtype) {
case MIB_INDEX_IN_OID:
/* Does the key match the value we just got? */
if (*kwalk->key == '*') {
/* Match all. Add an extra key-record at the end. */
keyrecord_t *newkey;
newkey = (keyrecord_t *)calloc(1, sizeof(keyrecord_t));
memcpy(newkey, kwalk, sizeof(keyrecord_t));
newkey->indexoid = strdup(oidstr + keyoidlen + 1);
newkey->key = valstr; valstr = NULL;
newkey->next = kwalk->next;
kwalk->next = newkey;
done = 1;
}
else if (strcmp(valstr, kwalk->key) == 0) {
/* Grab the index part of the OID */
kwalk->indexoid = strdup(oidstr + keyoidlen + 1);
done = 1;
}
break;
case MIB_INDEX_IN_VALUE:
/* Does the key match the index-part of the result OID? */
if (*kwalk->key == '*') {
/* Match all. Add an extra key-record at the end. */
keyrecord_t *newkey;
newkey = (keyrecord_t *)calloc(1, sizeof(keyrecord_t));
memcpy(newkey, kwalk, sizeof(keyrecord_t));
newkey->indexoid = valstr; valstr = NULL;
newkey->key = strdup(oidstr + keyoidlen + 1);
newkey->next = kwalk->next;
kwalk->next = newkey;
done = 1;
}
else if ((*(oidstr+keyoidlen) == '.') && (strcmp(oidstr+keyoidlen+1, kwalk->key)) == 0) {
/*
* Grab the index which is the value.
* Avoid a strdup by grabbing the valstr pointer.
*/
kwalk->indexoid = valstr; valstr = NULL; valsz = 0;
done = 1;
}
break;
}
}
break;
case GET_DATA:
owalk = req->curr_oid;
vp = pdu->variables;
while (vp) {
valsz = len = 0;
sprint_realloc_value((unsigned char **)&owalk->result, &valsz, &len, 1,
vp->name, vp->name_length, vp);
owalk = owalk->next; vp = vp->next_variable;
}
break;
}
if (valstr) xfree(valstr);
if (oidstr) xfree(oidstr);
}
else {
errorcount++;
errprintf("ERROR %s: %s\n", req->hostip[req->hostipidx], snmp_errstring(pdu->errstat));
}
return 1;
case STAT_TIMEOUT:
timeoutcount++;
dbgprintf("%s: Timeout\n", req->hostip);
if (req->hostip[req->hostipidx+1]) {
req->hostipidx++;
startonehost(req, 1);
}
return 0;
case STAT_ERROR:
errorcount++;
snmp_sess_perror(req->hostip[req->hostipidx], req->sess);
return 0;
}
return 0;
}
void
getbulk_table_entries(netsnmp_session * ss)
{
int running = 1;
netsnmp_pdu *pdu, *response;
netsnmp_variable_list *vars, *last_var;
int count;
int status;
int i;
int row, col;
char *buf = NULL;
size_t buf_len = 0, out_len = 0;
char *cp;
char *name_p = NULL;
char **dp;
while (running) {
/*
* create PDU for GETBULK request and add object name to request
*/
pdu = snmp_pdu_create(SNMP_MSG_GETBULK);
pdu->non_repeaters = 0;
pdu->max_repetitions = max_getbulk;
snmp_add_null_var(pdu, name, name_length);
/*
* do the request
*/
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS) {
if (response->errstat == SNMP_ERR_NOERROR) {
/*
* check resulting variables
*/
vars = response->variables;
last_var = NULL;
while (vars) {
out_len = 0;
sprint_realloc_objid((u_char **)&buf, &buf_len, &out_len, 1,
vars->name, vars->name_length);
if (vars->type == SNMP_ENDOFMIBVIEW ||
memcmp(vars->name, name,
rootlen * sizeof(oid)) != 0) {
if (localdebug) {
printf("%s => end of table\n",
buf ? (char *) buf : "[NIL]");
}
running = 0;
break;
}
if (localdebug) {
printf("%s => taken\n",
buf ? (char *) buf : "[NIL]");
}
for (col = 0; col < fields; col++)
if (column[col].subid == vars->name[rootlen])
break;
if (col == fields) {
extra_columns = 1;
last_var = vars;
vars = vars->next_variable;
continue;
}
if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_EXTENDED_INDEX)) {
name_p = strchr(buf, '[');
} else {
switch (netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_OID_OUTPUT_FORMAT)) {
case NETSNMP_OID_OUTPUT_MODULE:
case 0:
name_p = strchr(buf, ':')+1;
break;
case NETSNMP_OID_OUTPUT_SUFFIX:
name_p = buf;
break;
case NETSNMP_OID_OUTPUT_FULL:
case NETSNMP_OID_OUTPUT_NUMERIC:
case NETSNMP_OID_OUTPUT_UCD:
name_p = buf + strlen(table_name)+1;
name_p = strchr(name_p, '.')+1;
break;
default:
fprintf(stderr, "Unrecognized -O option: %d\n",
netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_OID_OUTPUT_FORMAT));
exit(1);
}
name_p = strchr(name_p, '.');
if ( name_p == NULL ) {
/* The 'strchr' call above failed, i.e. the results
* don't seem to include instance subidentifiers! */
running = 0;
break;
}
name_p++; /* Move on to the instance identifier */
}
for (row = 0; row < entries; row++)
if (strcmp(name_p, indices[row]) == 0)
break;
if (row == entries) {
entries++;
if (entries >= allocated) {
if (allocated == 0) {
allocated = 10;
data =
(char **) malloc(allocated * fields *
sizeof(char *));
memset(data, 0,
allocated * fields *
sizeof(char *));
indices =
(char **) malloc(allocated *
sizeof(char *));
} else {
allocated += 10;
data =
(char **) realloc(data,
allocated * fields *
sizeof(char *));
memset(data + entries * fields, 0,
(allocated -
entries) * fields *
sizeof(char *));
indices =
(char **) realloc(indices,
allocated *
sizeof(char *));
}
}
indices[row] = strdup(name_p);
i = strlen(name_p);
if (i > index_width)
index_width = i;
}
dp = data + row * fields;
out_len = 0;
sprint_realloc_value((u_char **)&buf, &buf_len, &out_len, 1,
vars->name, vars->name_length,
vars);
for (cp = buf; *cp; cp++)
if (*cp == '\n')
*cp = ' ';
dp[col] = buf;
i = out_len;
buf = NULL;
buf_len = 0;
if (i > column[col].width)
column[col].width = i;
last_var = vars;
vars = vars->next_variable;
}
if (last_var) {
name_length = last_var->name_length;
memcpy(name, last_var->name,
name_length * sizeof(oid));
}
} else {
/*
* error in response, print it
*/
running = 0;
if (response->errstat == SNMP_ERR_NOSUCHNAME) {
printf("End of MIB\n");
} else {
fprintf(stderr, "Error in packet.\nReason: %s\n",
snmp_errstring(response->errstat));
if (response->errstat == SNMP_ERR_NOSUCHNAME) {
fprintf(stderr,
"The request for this object identifier failed: ");
for (count = 1, vars = response->variables;
vars && count != response->errindex;
vars = vars->next_variable, count++)
/*EMPTY*/;
if (vars) {
fprint_objid(stderr, vars->name,
vars->name_length);
}
fprintf(stderr, "\n");
}
exitval = 2;
}
}
} else if (status == STAT_TIMEOUT) {
fprintf(stderr, "Timeout: No Response from %s\n",
ss->peername);
running = 0;
exitval = 1;
} else { /* status == STAT_ERROR */
snmp_sess_perror("snmptable", ss);
running = 0;
exitval = 1;
}
if (response)
snmp_free_pdu(response);
}
}
void
get_table_entries(netsnmp_session * ss)
{
int running = 1;
netsnmp_pdu *pdu, *response;
netsnmp_variable_list *vars;
int count;
int status;
int i;
int col;
char *buf = NULL;
size_t out_len = 0, buf_len = 0;
char *cp;
char *name_p = NULL;
char **dp;
int have_current_index;
/*
* TODO:
* 1) Deal with multiple index fields
* 2) Deal with variable length index fields
* 3) optimize to remove a sparse column from get-requests
*/
while (running &&
((max_width && !column_width) || (entries < max_getbulk))) {
/*
* create PDU for GETNEXT request and add object name to request
*/
pdu = snmp_pdu_create(SNMP_MSG_GETNEXT);
for (i = 1; i <= fields; i++) {
name[rootlen] = column[i - 1].subid;
snmp_add_null_var(pdu, name, name_length);
}
/*
* do the request
*/
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS) {
if (response->errstat == SNMP_ERR_NOERROR) {
/*
* check resulting variables
*/
vars = response->variables;
entries++;
if (entries >= allocated) {
if (allocated == 0) {
allocated = 10;
data =
(char **) malloc(allocated * fields *
sizeof(char *));
memset(data, 0,
allocated * fields * sizeof(char *));
if (show_index)
indices =
(char **) malloc(allocated *
sizeof(char *));
} else {
allocated += 10;
data =
(char **) realloc(data,
allocated * fields *
sizeof(char *));
memset(data + entries * fields, 0,
(allocated -
entries) * fields * sizeof(char *));
if (show_index)
indices =
(char **) realloc(indices,
allocated *
sizeof(char *));
}
}
dp = data + (entries - 1) * fields;
col = -1;
end_of_table = 1; /* assume end of table */
have_current_index = 0;
name_length = rootlen + 1;
for (vars = response->variables; vars;
vars = vars->next_variable) {
col++;
name[rootlen] = column[col].subid;
if ((vars->name_length < name_length) ||
(vars->name[rootlen] != column[col].subid) ||
memcmp(name, vars->name,
name_length * sizeof(oid)) != 0
|| vars->type == SNMP_ENDOFMIBVIEW) {
/*
* not part of this subtree
*/
if (localdebug) {
fprint_variable(stderr, vars->name,
vars->name_length, vars);
fprintf(stderr, " => ignored\n");
}
continue;
}
/*
* save index off
*/
if (!have_current_index) {
end_of_table = 0;
have_current_index = 1;
name_length = vars->name_length;
memcpy(name, vars->name,
name_length * sizeof(oid));
out_len = 0;
if (!sprint_realloc_objid
((u_char **)&buf, &buf_len, &out_len, 1, vars->name,
vars->name_length)) {
break;
}
i = vars->name_length - rootlen + 1;
if (localdebug || show_index) {
if (netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_EXTENDED_INDEX)) {
name_p = strchr(buf, '[');
} else {
switch (netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_OID_OUTPUT_FORMAT)) {
case NETSNMP_OID_OUTPUT_MODULE:
case 0:
name_p = strchr(buf, ':');
break;
case NETSNMP_OID_OUTPUT_SUFFIX:
name_p = buf;
break;
case NETSNMP_OID_OUTPUT_FULL:
case NETSNMP_OID_OUTPUT_NUMERIC:
case NETSNMP_OID_OUTPUT_UCD:
name_p = buf + strlen(table_name)+1;
name_p = strchr(name_p, '.')+1;
break;
default:
fprintf(stderr, "Unrecognized -O option: %d\n",
netsnmp_ds_get_int(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_OID_OUTPUT_FORMAT));
exit(1);
}
name_p = strchr(name_p, '.') + 1;
}
}
if (localdebug) {
printf("Name: %s Index: %s\n", buf, name_p);
}
if (show_index) {
indices[entries - 1] = strdup(name_p);
i = strlen(name_p);
if (i > index_width)
index_width = i;
}
}
if (localdebug && buf) {
printf("%s => taken\n", buf);
}
out_len = 0;
sprint_realloc_value((u_char **)&buf, &buf_len, &out_len, 1,
vars->name, vars->name_length,
vars);
for (cp = buf; *cp; cp++) {
if (*cp == '\n') {
*cp = ' ';
}
}
dp[col] = buf;
i = out_len;
buf = NULL;
buf_len = 0;
if (i > column[col].width) {
column[col].width = i;
}
}
if (end_of_table) {
--entries;
/*
* not part of this subtree
*/
if (localdebug) {
printf("End of table: %s\n",
buf ? (char *) buf : "[NIL]");
}
running = 0;
continue;
}
} else {
/*
* error in response, print it
*/
running = 0;
if (response->errstat == SNMP_ERR_NOSUCHNAME) {
printf("End of MIB\n");
end_of_table = 1;
} else {
fprintf(stderr, "Error in packet.\nReason: %s\n",
snmp_errstring(response->errstat));
if (response->errindex != 0) {
fprintf(stderr, "Failed object: ");
for (count = 1, vars = response->variables;
vars && count != response->errindex;
vars = vars->next_variable, count++)
/*EMPTY*/;
if (vars) {
fprint_objid(stderr, vars->name,
vars->name_length);
}
fprintf(stderr, "\n");
}
exitval = 2;
}
}
} else if (status == STAT_TIMEOUT) {
fprintf(stderr, "Timeout: No Response from %s\n",
ss->peername);
running = 0;
exitval = 1;
} else { /* status == STAT_ERROR */
snmp_sess_perror("snmptable", ss);
running = 0;
exitval = 1;
}
if (response)
snmp_free_pdu(response);
}
}
