mirror of
https://github.com/lwip-tcpip/lwip.git
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Implemented usm mib.
This commit is contained in:
Marco
Dirk Ziegelmeier
parent
46df850cb9
commit
4b97f2bb8e
417
src/apps/snmp/snmp_snmpv2_usm.c
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417
src/apps/snmp/snmp_snmpv2_usm.c
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@ -0,0 +1,417 @@
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/*
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Generated by LwipMibCompiler
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*/
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#include "lwip/apps/snmp_opts.h"
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#if LWIP_SNMP
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#include "lwip/apps/snmp_snmpv2_usm.h"
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#include "lwip/apps/snmp.h"
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#include "lwip/apps/snmp_core.h"
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#include "lwip/apps/snmp_scalar.h"
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#include "lwip/apps/snmp_table.h"
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#include "lwip/apps/snmpv3.h"
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#include "snmpv3_priv.h"
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#include "lwip/apps/snmp_snmpv2_framework.h"
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#include <string.h>
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/* --- usmUser 1.3.6.1.6.3.15.1.2 ----------------------------------------------------- */
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static const struct snmp_oid_range usmUserTable_oid_ranges[] = {
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff },
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{ 0, 0xff }, { 0, 0xff }, { 0, 0xff }, { 0, 0xff }
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};
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static u8_t snmp_engineid_to_oid(const char *engineid, u32_t *oid, u32_t len)
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{
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u8_t i;
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for (i = 0; i < len; i++) {
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oid[i] = engineid[i];
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}
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return len;
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}
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static u8_t snmp_oid_to_name(char *name, const u32_t *oid, u8_t len)
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{
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u8_t i;
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for (i = 0; i < len; i++) {
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name[i] = oid[i];
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}
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return len;
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}
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static u8_t snmp_name_to_oid(const char *name, u32_t *oid, u8_t len)
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{
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u8_t i;
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for (i = 0; i < len; i++) {
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oid[i] = name[i];
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}
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return len;
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}
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static const struct snmp_obj_id *snmp_auth_algo_to_oid(u8_t algo)
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{
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if (algo == SNMP_V3_AUTH_ALGO_MD5) {
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return &usmHMACMD5AuthProtocol;
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}
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else if (algo == SNMP_V3_AUTH_ALGO_SHA) {
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return &usmHMACMD5AuthProtocol;
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}
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return &usmNoAuthProtocol;
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}
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static const struct snmp_obj_id *snmp_priv_algo_to_oid(u8_t algo)
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{
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if (algo == SNMP_V3_PRIV_ALGO_DES) {
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return &usmDESPrivProtocol;
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}
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else if (algo == SNMP_V3_PRIV_ALGO_AES) {
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return &usmAESPrivProtocol;
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}
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return &usmNoPrivProtocol;
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}
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char username[32];
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static snmp_err_t usmusertable_get_instance(const u32_t *column, const u32_t *row_oid, u8_t row_oid_len, struct snmp_node_instance *cell_instance)
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{
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const char *engineid;
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u8_t eid_len;
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u32_t engineid_oid[SNMP_V3_MAX_ENGINE_ID_LENGTH];
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u8_t name_len;
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u8_t engineid_len;
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u8_t name_start;
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u8_t engineid_start;
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snmpv3_get_engine_id(&engineid, &eid_len);
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engineid_len = row_oid[0];
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engineid_start = 1;
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if (engineid_len != eid_len) {
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/* EngineID length does not match! */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if (engineid_len > row_oid_len) {
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/* row OID doesn't contain enough data according to engineid_len.*/
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* check if incoming OID length and if values are in plausible range */
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if (!snmp_oid_in_range(&row_oid[engineid_start], engineid_len, usmUserTable_oid_ranges, engineid_len)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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snmp_engineid_to_oid(engineid, engineid_oid, engineid_len);
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/* Verify EngineID */
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if (snmp_oid_equal(&row_oid[engineid_start], engineid_len, engineid_oid, engineid_len)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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name_len = row_oid[engineid_start + engineid_len];
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name_start = engineid_start + engineid_len + 1;
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if (name_len > SNMP_V3_MAX_USER_LENGTH) {
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/* specified name is too long */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if (1 + engineid_len + 1 + name_len != row_oid_len) {
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/* Length of EngineID and name does not match row oid length. (+2 for length fields)*/
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* check if incoming OID length and if values are in plausible range */
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if (!snmp_oid_in_range(&row_oid[name_start], name_len, usmUserTable_oid_ranges, name_len)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* Verify if user exists */
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memset(username, 0, sizeof(username));
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snmp_oid_to_name(username, &row_oid[name_start], name_len);
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if (snmpv3_get_user(username, NULL, NULL, NULL, NULL) != ERR_OK) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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/* Save name in reference pointer to make it easier to handle later on */
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cell_instance->reference.ptr = username;
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cell_instance->reference_len = name_len;
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/* user was found */
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return SNMP_ERR_NOERROR;
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}
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/*
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* valid oid options
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* <oid>
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* <oid>.<EngineID length>
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* <oid>.<EngineID length>.<partial EngineID>
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* <oid>.<EngineID length>.<EngineID>
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* <oid>.<EngineID length>.<EngineID>.<UserName length>
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* <oid>.<EngineID length>.<EngineID>.<UserName length>.<partial UserName>
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* <oid>.<EngineID length>.<EngineID>.<UserName length>.<UserName>
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*
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*/
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static snmp_err_t usmusertable_get_next_instance(const u32_t *column, struct snmp_obj_id *row_oid, struct snmp_node_instance *cell_instance)
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{
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const char *engineid;
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u8_t eid_len;
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u32_t engineid_oid[SNMP_V3_MAX_ENGINE_ID_LENGTH];
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u8_t name_len;
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u8_t engineid_len;
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u8_t name_start;
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u8_t engineid_start = 1;
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u8_t i;
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struct snmp_next_oid_state state;
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u32_t result_temp[LWIP_ARRAYSIZE(usmUserTable_oid_ranges)];
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snmpv3_get_engine_id(&engineid, &eid_len);
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/* If EngineID might be given */
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if (row_oid->len > 0) {
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engineid_len = row_oid->id[0];
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engineid_start = 1;
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if (engineid_len != eid_len) {
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/* EngineID length does not match! */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if (engineid_len > row_oid->len) {
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/* Verify partial EngineID */
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snmp_engineid_to_oid(engineid, engineid_oid, row_oid->len - 1);
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if (!snmp_oid_equal(&row_oid->id[engineid_start], row_oid->len - 1, engineid_oid, row_oid->len - 1)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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}
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else {
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/* Verify complete EngineID */
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snmp_engineid_to_oid(engineid, engineid_oid, engineid_len);
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if (!snmp_oid_equal(&row_oid->id[engineid_start], engineid_len, engineid_oid, engineid_len)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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}
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/* At this point, the given EngineID (partially) matches the local EngineID.*/
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/* If name might also be given */
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if (row_oid->len > engineid_start + engineid_len) {
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name_len = row_oid->id[engineid_start + engineid_len];
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name_start = engineid_start + engineid_len + 1;
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if (name_len > SNMP_V3_MAX_USER_LENGTH) {
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/* specified name is too long, max length is 32 according to mib file.*/
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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if (row_oid->len < engineid_len + name_len + 2) {
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/* Partial name given according to oid.*/
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u8_t tmplen = row_oid->len - engineid_len - 2;
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if (!snmp_oid_in_range(&row_oid->id[name_start], tmplen, usmUserTable_oid_ranges, tmplen)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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}
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else {
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/* Full name given according to oid. Also test for too much data.*/
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u8_t tmplen = row_oid->len - engineid_len - 2;
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if (!snmp_oid_in_range(&row_oid->id[name_start], name_len, usmUserTable_oid_ranges, tmplen)) {
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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}
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/* At this point the EngineID and (partial) UserName match the local EngineID and UserName.*/
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}
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}
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/* init struct to search next oid */
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snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(usmUserTable_oid_ranges));
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for (i = 0; i < snmpv3_get_amount_of_users(); i++) {
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u32_t test_oid[LWIP_ARRAYSIZE(usmUserTable_oid_ranges)];
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test_oid[0] = eid_len;
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snmp_engineid_to_oid(engineid, &test_oid[1], eid_len);
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snmpv3_get_username(username, i);
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test_oid[1 + eid_len] = strlen(username);
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snmp_name_to_oid(username, &test_oid[2 + eid_len], strlen(username));
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/* check generated OID: is it a candidate for the next one? */
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snmp_next_oid_check(&state, test_oid, 1 + eid_len + 1 + strlen(username), (void *)(uintptr_t)i);
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}
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/* did we find a next one? */
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if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) {
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snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len);
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/* store username for subsequent operations (get/test/set) */
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memset(username, 0, sizeof(username));
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snmpv3_get_username(username, (uintptr_t)state.reference);
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cell_instance->reference.ptr = username;
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cell_instance->reference_len = strlen(username);
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return SNMP_ERR_NOERROR;
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}
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/* not found */
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return SNMP_ERR_NOSUCHINSTANCE;
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}
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static s16_t usmusertable_get_value(struct snmp_node_instance *cell_instance, void *value)
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{
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u8_t u8;
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switch (SNMP_TABLE_GET_COLUMN_FROM_OID(cell_instance->instance_oid.id)) {
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case 3: /* usmUserSecurityName */
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MEMCPY(value, cell_instance->reference.ptr, cell_instance->reference_len);
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return cell_instance->reference_len;
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break;
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case 4: /* usmUserCloneFrom */
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MEMCPY(value, snmp_zero_dot_zero.id, snmp_zero_dot_zero.len * sizeof(u32_t));
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return snmp_zero_dot_zero.len * sizeof(u32_t);
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case 5: /* usmUserAuthProtocol */
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{
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const struct snmp_obj_id *auth_algo;
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snmpv3_get_user(cell_instance->reference.ptr, &u8, NULL, NULL, NULL);
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auth_algo = snmp_auth_algo_to_oid(u8);
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MEMCPY(value, auth_algo->id, auth_algo->len * sizeof(u32_t));
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return auth_algo->len * sizeof(u32_t);
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}
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case 6: /* usmUserAuthKeyChange */
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return 0;
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case 7: /* usmUserOwnAuthKeyChange */
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return 0;
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case 8: /* usmUserPrivProtocol */
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{
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const struct snmp_obj_id *priv_algo;
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snmpv3_get_user(cell_instance->reference.ptr, NULL, NULL, &u8, NULL);
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priv_algo = snmp_priv_algo_to_oid(u8);
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MEMCPY(value, priv_algo->id, priv_algo->len * sizeof(u32_t));
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return priv_algo->len * sizeof(u32_t);
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}
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case 9: /* usmUserPrivKeyChange */
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return 0;
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case 10: /* usmUserOwnPrivKeyChange */
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return 0;
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case 11: /* usmUserPublic */
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/* TODO: Implement usmUserPublic */
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return 0;
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case 12: /* usmUserStorageType */
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snmpv3_get_user_storagetype(cell_instance->reference.ptr, &u8);
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*(s32_t*)value = u8;
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return sizeof(s32_t);
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case 13: /* usmUserStatus */
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*(s32_t*)value = 1; /* active */
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return sizeof(s32_t);
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default:
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LWIP_DEBUGF(SNMP_MIB_DEBUG,("usmusertable_get_value(): unknown id: %"S32_F"\n", SNMP_TABLE_GET_COLUMN_FROM_OID(cell_instance->instance_oid.id)));
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return 0;
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}
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}
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/* --- usmMIBObjects 1.3.6.1.6.3.15.1 ----------------------------------------------------- */
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static s16_t usmstats_scalars_get_value(const struct snmp_scalar_array_node_def *node, void *value)
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{
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u32_t *uint_ptr = (u32_t*)value;
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switch (node->oid) {
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case 1: /* usmStatsUnsupportedSecLevels */
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*uint_ptr = snmp_stats.unsupportedseclevels;
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break;
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case 2: /* usmStatsNotInTimeWindows */
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*uint_ptr = snmp_stats.notintimewindows;
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break;
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case 3: /* usmStatsUnknownUserNames */
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*uint_ptr = snmp_stats.unknownusernames;
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break;
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case 4: /* usmStatsUnknownEngineIDs */
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*uint_ptr = snmp_stats.unknownengineids;
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break;
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case 5: /* usmStatsWrongDigests */
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*uint_ptr = snmp_stats.wrongdigests;
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break;
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case 6: /* usmStatsDecryptionErrors */
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*uint_ptr = snmp_stats.decryptionerrors;
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break;
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default:
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LWIP_DEBUGF(SNMP_MIB_DEBUG,("usmstats_scalars_get_value(): unknown id: %"S32_F"\n", node->oid));
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return 0;
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}
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return sizeof(*uint_ptr);
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}
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/* --- snmpUsmMIB ----------------------------------------------------- */
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/* --- usmUser 1.3.6.1.6.3.15.1.2 ----------------------------------------------------- */
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static const struct snmp_table_col_def usmusertable_columns[] = {
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{3, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserSecurityName */
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{4, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserCloneFrom */
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{5, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserAuthProtocol */
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{6, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserAuthKeyChange */
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{7, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserOwnAuthKeyChange */
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{8, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserPrivProtocol */
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{9, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserPrivKeyChange */
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{10, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserOwnPrivKeyChange */
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{11, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserPublic */
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{12, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserStorageType */
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{13, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmUserStatus */
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};
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static const struct snmp_table_node usmusertable = SNMP_TABLE_CREATE(2, usmusertable_columns, usmusertable_get_instance, usmusertable_get_next_instance, usmusertable_get_value, NULL, NULL);
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static const struct snmp_node *const usmuser_subnodes[] = {
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&usmusertable.node.node
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};
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static const struct snmp_tree_node usmuser_treenode = SNMP_CREATE_TREE_NODE(2, usmuser_subnodes);
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/* --- usmMIBObjects 1.3.6.1.6.3.15.1 ----------------------------------------------------- */
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static const struct snmp_scalar_array_node_def usmstats_scalars_nodes[] = {
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{1, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsUnsupportedSecLevels */
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{2, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsNotInTimeWindows */
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{3, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsUnknownUserNames */
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{4, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsUnknownEngineIDs */
|
||||
{5, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsWrongDigests */
|
||||
{6, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* usmStatsDecryptionErrors */
|
||||
};
|
||||
static const struct snmp_scalar_array_node usmstats_scalars = SNMP_SCALAR_CREATE_ARRAY_NODE(1, usmstats_scalars_nodes, usmstats_scalars_get_value, NULL, NULL);
|
||||
|
||||
static const struct snmp_node *const usmmibobjects_subnodes[] = {
|
||||
&usmstats_scalars.node.node,
|
||||
&usmuser_treenode.node
|
||||
};
|
||||
static const struct snmp_tree_node usmmibobjects_treenode = SNMP_CREATE_TREE_NODE(1, usmmibobjects_subnodes);
|
||||
|
||||
/* --- snmpUsmMIB ----------------------------------------------------- */
|
||||
static const struct snmp_node *const snmpusmmib_subnodes[] = {
|
||||
&usmmibobjects_treenode.node
|
||||
};
|
||||
static const struct snmp_tree_node snmpusmmib_root = SNMP_CREATE_TREE_NODE(15, snmpusmmib_subnodes);
|
||||
static const u32_t snmpusmmib_base_oid[] = {1,3,6,1,6,3,15};
|
||||
const struct snmp_mib snmpusmmib = {snmpusmmib_base_oid, LWIP_ARRAYSIZE(snmpusmmib_base_oid), &snmpusmmib_root.node};
|
||||
|
||||
#endif /* LWIP_SNMP */
|
||||
24
src/include/lwip/apps/snmp_snmpv2_usm.h
Normal file
24
src/include/lwip/apps/snmp_snmpv2_usm.h
Normal file
@ -0,0 +1,24 @@
|
||||
/*
|
||||
Generated by LwipMibCompiler
|
||||
*/
|
||||
|
||||
#ifndef SNMP_USER_BASED_SM_MIB_H
|
||||
#define SNMP_USER_BASED_SM_MIB_H SNMP_USER_BASED_SM_MIB_H
|
||||
|
||||
#include "lwip/apps/snmp_opts.h"
|
||||
#if LWIP_SNMP
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#include "lwip/apps/snmp_core.h"
|
||||
|
||||
extern const struct snmp_mib snmpusmmib;
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#endif /* LWIP_SNMP */
|
||||
#endif /* SNMP_USER_BASED_SM_MIB_H */
|
||||
@ -51,6 +51,12 @@
|
||||
#define SNMP_V3_PRIV_MODE_DECRYPT 0
|
||||
#define SNMP_V3_PRIV_MODE_ENCRYPT 1
|
||||
|
||||
#define SNMP_V3_USER_STORAGETYPE_OTHER 1
|
||||
#define SNMP_V3_USER_STORAGETYPE_VOLATILE 2
|
||||
#define SNMP_V3_USER_STORAGETYPE_NONVOLATILE 3
|
||||
#define SNMP_V3_USER_STORAGETYPE_PERMANENT 4
|
||||
#define SNMP_V3_USER_STORAGETYPE_READONLY 5
|
||||
|
||||
/*
|
||||
* The following callback functions must be implemented by the application.
|
||||
* There is a dummy implementation in snmpv3_dummy.c.
|
||||
@ -66,6 +72,9 @@ u32_t snmpv3_get_engine_time(void);
|
||||
void snmpv3_reset_engine_time(void);
|
||||
|
||||
err_t snmpv3_get_user(const char* username, u8_t *auth_algo, u8_t *auth_key, u8_t *priv_algo, u8_t *priv_key);
|
||||
u8_t snmpv3_get_amount_of_users(void);
|
||||
err_t snmpv3_get_user_storagetype(const char *username, u8_t *storagetype);
|
||||
err_t snmpv3_get_username(char *username, u8_t index);
|
||||
|
||||
/* The following functions are provided by the SNMPv3 agent */
|
||||
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user