int
handle_subagent_set_response(int op, netsnmp_session * session, int reqid,
netsnmp_pdu *pdu, void *magic)
{
netsnmp_session *retsess;
struct agent_netsnmp_set_info *asi;
if (op != NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE || magic == NULL) {
return 1;
}
DEBUGMSGTL(("agentx/subagent",
"handling agentx subagent set response (mode=%d,req=0x%x,"
"trans=0x%x,sess=0x%x)\n",
pdu->command, pdu->reqid,pdu->transid, pdu->sessid));
pdu = snmp_clone_pdu(pdu);
asi = (struct agent_netsnmp_set_info *) magic;
retsess = asi->sess;
asi->errstat = pdu->errstat;
if (asi->mode == SNMP_MSG_INTERNAL_SET_RESERVE1) {
/*
* reloop for RESERVE2 mode, an internal only agent mode
*/
/*
* XXX: check exception statuses of reserve1 first
*/
if (!pdu->errstat) {
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_RESERVE2;
snmp_async_send(agentx_callback_sess, pdu,
handle_subagent_set_response, asi);
DEBUGMSGTL(("agentx/subagent",
" going from RESERVE1 -> RESERVE2\n"));
return 1;
}
} else {
if (asi->mode == SNMP_MSG_INTERNAL_SET_FREE ||
asi->mode == SNMP_MSG_INTERNAL_SET_UNDO ||
asi->mode == SNMP_MSG_INTERNAL_SET_COMMIT) {
free_set_vars(retsess, pdu);
}
snmp_free_varbind(pdu->variables);
pdu->variables = NULL; /* the variables were added by us */
}
netsnmp_assert(retsess != NULL);
pdu->command = AGENTX_MSG_RESPONSE;
pdu->version = retsess->version;
if (!snmp_send(retsess, pdu)) {
snmp_free_pdu(pdu);
}
DEBUGMSGTL(("agentx/subagent", " FINISHED\n"));
return 1;
}
/*
* send_trap_to_sess: sends a trap to a session but assumes that the
* pdu is constructed correctly for the session type.
*/
void
send_trap_to_sess(netsnmp_session * sess, netsnmp_pdu *template_pdu)
{
netsnmp_pdu *pdu;
int result;
int len;
if (!sess || !template_pdu)
return;
DEBUGMSGTL(("trap", "sending trap type=%d, version=%ld\n",
template_pdu->command, sess->version));
#ifndef NETSNMP_DISABLE_SNMPV1
if (sess->version == SNMP_VERSION_1 &&
(template_pdu->command != SNMP_MSG_TRAP))
return; /* Skip v1 sinks for v2 only traps */
if (sess->version != SNMP_VERSION_1 &&
(template_pdu->command == SNMP_MSG_TRAP))
return; /* Skip v2+ sinks for v1 only traps */
#endif
template_pdu->version = sess->version;
pdu = snmp_clone_pdu(template_pdu);
pdu->sessid = sess->sessid; /* AgentX only ? */
if ( template_pdu->command == SNMP_MSG_INFORM
#ifdef USING_AGENTX_PROTOCOL_MODULE
|| template_pdu->command == AGENTX_MSG_NOTIFY
#endif
) {
result =
snmp_async_send(sess, pdu, &handle_inform_response, NULL);
} else {
if ((sess->version == SNMP_VERSION_3) &&
(pdu->command == SNMP_MSG_TRAP2) &&
(sess->securityEngineIDLen == 0)) {
u_char tmp[SPRINT_MAX_LEN];
len = snmpv3_get_engineID(tmp, sizeof(tmp));
memdup(&pdu->securityEngineID, tmp, len);
pdu->securityEngineIDLen = len;
}
result = snmp_send(sess, pdu);
}
if (result == 0) {
snmp_sess_perror("snmpd: send_trap", sess);
snmp_free_pdu(pdu);
} else {
snmp_increment_statistic(STAT_SNMPOUTTRAPS);
snmp_increment_statistic(STAT_SNMPOUTPKTS);
}
}
static int send_pdu(netsnmp_session *ss, netsnmp_pdu *pdu, int kind, int link_id)
{
int status;
netsnmp_callback cb;
cb = kind == SNMP_LINK_UP ? link_up_cb : link_down_cb;
status = snmp_async_send(ss, pdu, cb, (void *) link_id);
if (status == 0) {
snmp_log(LOG_ERR, "Failed to send async request.\n");
snmp_free_pdu(pdu);
}
return status;
}
/*
* send_trap_to_sess: sends a trap to a session but assumes that the
* pdu is constructed correctly for the session type.
*/
void
send_trap_to_sess(netsnmp_session * sess, netsnmp_pdu *template_pdu)
{
netsnmp_pdu *pdu;
int result;
if (!sess || !template_pdu)
return;
DEBUGMSGTL(("trap", "sending trap type=%d, version=%d\n",
template_pdu->command, sess->version));
#ifndef DISABLE_SNMPV1
if (sess->version == SNMP_VERSION_1 &&
(template_pdu->command != SNMP_MSG_TRAP))
return; /* Skip v1 sinks for v2 only traps */
#endif
template_pdu->version = sess->version;
pdu = snmp_clone_pdu(template_pdu);
pdu->sessid = sess->sessid; /* AgentX only ? */
if ( template_pdu->command == SNMP_MSG_INFORM
#ifdef USING_AGENTX_PROTOCOL_MODULE
|| template_pdu->command == AGENTX_MSG_NOTIFY
#endif
) {
result =
snmp_async_send(sess, pdu, &handle_inform_response, NULL);
} else {
result = snmp_send(sess, pdu);
}
if (result == 0) {
snmp_sess_perror("snmpd: send_trap", sess);
snmp_free_pdu(pdu);
} else {
snmp_increment_statistic(STAT_SNMPOUTTRAPS);
snmp_increment_statistic(STAT_SNMPOUTPKTS);
}
}
int
handle_next_pass(struct agent_snmp_session *asp)
{
int status;
struct snmp_pdu *pdu = asp->pdu;
struct request_list *req_p, *next_req;
if ( asp->outstanding_requests != NULL )
return SNMP_ERR_NOERROR;
status = handle_var_list( asp );
if ( asp->outstanding_requests != NULL ) {
if ( status == SNMP_ERR_NOERROR ) {
/* Send out any subagent requests */
for ( req_p = asp->outstanding_requests ;
req_p != NULL ; req_p = req_p->next_request ) {
snmp_async_send( req_p->session, req_p->pdu,
req_p->callback, req_p->cb_data );
}
asp->pdu = snmp_clone_pdu( pdu );
asp->pdu->variables = pdu->variables;
pdu->variables = NULL;
}
else {
/* discard outstanding requests */
for ( req_p = asp->outstanding_requests ;
req_p != NULL ; req_p = next_req ) {
next_req = req_p->next_request;
free( req_p );
}
asp->outstanding_requests = NULL;
}
}
return status;
}
/*
*
* AgentX State diagram. [mode] = internal mode it's mapped from:
*
* TESTSET -success-> COMMIT -success-> CLEANUP
* [RESERVE1] [ACTION] [COMMIT]
* | |
* | \--failure-> UNDO
* | [UNDO]
* |
* --failure-> CLEANUP
* [FREE]
*/
int
agentx_master_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_session *ax_session = (netsnmp_session *) handler->myvoid;
netsnmp_request_info *request = requests;
netsnmp_pdu *pdu;
void *cb_data;
int result;
DEBUGMSGTL(("agentx/master",
"agentx master handler starting, mode = 0x%02x\n",
reqinfo->mode));
if (!ax_session) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_GENERR);
return SNMP_ERR_NOERROR;
}
/*
* build a new pdu based on the pdu type coming in
*/
switch (reqinfo->mode) {
case MODE_GET:
pdu = snmp_pdu_create(AGENTX_MSG_GET);
break;
case MODE_GETNEXT:
pdu = snmp_pdu_create(AGENTX_MSG_GETNEXT);
break;
case MODE_GETBULK: /* WWWXXX */
pdu = snmp_pdu_create(AGENTX_MSG_GETNEXT);
break;
case MODE_SET_RESERVE1:
pdu = snmp_pdu_create(AGENTX_MSG_TESTSET);
break;
case MODE_SET_RESERVE2:
/*
* don't do anything here for AgentX. Assume all is fine
* and go on since AgentX only has one test phase.
*/
return SNMP_ERR_NOERROR;
case MODE_SET_ACTION:
pdu = snmp_pdu_create(AGENTX_MSG_COMMITSET);
break;
case MODE_SET_UNDO:
pdu = snmp_pdu_create(AGENTX_MSG_UNDOSET);
break;
case MODE_SET_COMMIT:
case MODE_SET_FREE:
pdu = snmp_pdu_create(AGENTX_MSG_CLEANUPSET);
break;
default:
snmp_log(LOG_WARNING,
"unsupported mode for agentx/master called\n");
return SNMP_ERR_NOERROR;
}
if (!pdu) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_GENERR);
return SNMP_ERR_NOERROR;
}
pdu->version = AGENTX_VERSION_1;
pdu->reqid = snmp_get_next_transid();
pdu->transid = reqinfo->asp->pdu->transid;
pdu->sessid = ax_session->subsession->sessid;
if (reginfo->contextName) {
pdu->community = (u_char *) strdup(reginfo->contextName);
pdu->community_len = strlen(reginfo->contextName);
pdu->flags |= AGENTX_MSG_FLAG_NON_DEFAULT_CONTEXT;
}
if (ax_session->subsession->flags & AGENTX_MSG_FLAG_NETWORK_BYTE_ORDER)
pdu->flags |= AGENTX_MSG_FLAG_NETWORK_BYTE_ORDER;
while (request) {
size_t nlen = request->requestvb->name_length;
oid *nptr = request->requestvb->name;
DEBUGMSGTL(("agentx/master","request for variable ("));
DEBUGMSGOID(("agentx/master", nptr, nlen));
DEBUGMSG(("agentx/master", ")\n"));
/*
* loop through all the requests and create agentx ones out of them
*/
if (reqinfo->mode == MODE_GETNEXT || reqinfo->mode == MODE_GETBULK) {
if (snmp_oid_compare(nptr, nlen, request->subtree->start_a,
request->subtree->start_len) < 0) {
DEBUGMSGTL(("agentx/master","inexact request preceeding region ("));
DEBUGMSGOID(("agentx/master", request->subtree->start_a,
request->subtree->start_len));
DEBUGMSG(("agentx/master", ")\n"));
nptr = request->subtree->start_a;
nlen = request->subtree->start_len;
request->inclusive = 1;
}
if (request->inclusive) {
DEBUGMSGTL(("agentx/master", "INCLUSIVE varbind "));
DEBUGMSGOID(("agentx/master", nptr, nlen));
DEBUGMSG(("agentx/master", " scoped to "));
DEBUGMSGOID(("agentx/master", request->range_end,
request->range_end_len));
DEBUGMSG(("agentx/master", "\n"));
snmp_pdu_add_variable(pdu, nptr, nlen, ASN_PRIV_INCL_RANGE,
(u_char *) request->range_end,
request->range_end_len *
sizeof(oid));
request->inclusive = 0;
} else {
DEBUGMSGTL(("agentx/master", "EXCLUSIVE varbind "));
DEBUGMSGOID(("agentx/master", nptr, nlen));
DEBUGMSG(("agentx/master", " scoped to "));
DEBUGMSGOID(("agentx/master", request->range_end,
request->range_end_len));
DEBUGMSG(("agentx/master", "\n"));
snmp_pdu_add_variable(pdu, nptr, nlen, ASN_PRIV_EXCL_RANGE,
(u_char *) request->range_end,
request->range_end_len *
sizeof(oid));
}
} else {
snmp_pdu_add_variable(pdu, request->requestvb->name,
request->requestvb->name_length,
request->requestvb->type,
request->requestvb->val.string,
request->requestvb->val_len);
}
/*
* mark the request as delayed
*/
if (pdu->command != AGENTX_MSG_CLEANUPSET)
request->delegated = REQUEST_IS_DELEGATED;
else
request->delegated = REQUEST_IS_NOT_DELEGATED;
/*
* next...
*/
request = request->next;
}
/*
* When the master sends a CleanupSet PDU, it will never get a response
* back from the subagent. So we shouldn't allocate the
* netsnmp_delegated_cache structure in this case.
*/
if (pdu->command != AGENTX_MSG_CLEANUPSET)
cb_data = netsnmp_create_delegated_cache(handler, reginfo,
reqinfo, requests,
(void *) ax_session);
else
cb_data = NULL;
/*
* send the requests out.
*/
DEBUGMSGTL(("agentx", "sending pdu (req=0x%x,trans=0x%x,sess=0x%x)\n",
(unsigned)pdu->reqid, (unsigned)pdu->transid, (unsigned)pdu->sessid));
result = snmp_async_send(ax_session, pdu, agentx_got_response, cb_data);
if (result == 0) {
snmp_free_pdu(pdu);
}
return SNMP_ERR_NOERROR;
}
/*
* Configure special parameters on the session.
* Currently takes the parameter configured and changes it if something
* was configured. It becomes "-c" if the community string from the pdu
* is placed on the session.
*/
int
proxy_fill_in_session(netsnmp_mib_handler *handler,
netsnmp_agent_request_info *reqinfo,
void **configured)
{
netsnmp_session *session;
struct simple_proxy *sp;
sp = (struct simple_proxy *) handler->myvoid;
if (!sp) {
return 0;
}
session = sp->sess;
if (!session) {
return 0;
}
#if !defined(DISABLE_SNMPV1) || !defined(DISABLE_SNMPV2C)
#if defined(DISABLE_SNMPV1)
if (session->version == SNMP_VERSION_2c) {
#else
#if defined(DISABLE_SNMPV2C)
if (session->version == SNMP_VERSION_1) {
#else
if (session->version == SNMP_VERSION_1 ||
session->version == SNMP_VERSION_2c) {
#endif
#endif
/*
* Check if session has community string defined for it.
* If not, need to extract community string from the pdu.
* Copy to session and set 'configured' to indicate this.
*/
if (session->community_len == 0) {
DEBUGMSGTL(("proxy", "session has no community string\n"));
if (reqinfo->asp == NULL || reqinfo->asp->pdu == NULL ||
reqinfo->asp->pdu->community_len == 0) {
return 0;
}
*configured = malloc(strlen("-c") + 1);
strcpy(*configured, "-c");
DEBUGMSGTL(("proxy", "pdu has community string\n"));
session->community_len = reqinfo->asp->pdu->community_len;
session->community = malloc(session->community_len + 1);
strncpy((char *)session->community,
(const char *)reqinfo->asp->pdu->community,
session->community_len);
}
}
#endif
return 1;
}
/*
* Free any specially configured parameters used on the session.
*/
void
proxy_free_filled_in_session_args(netsnmp_session *session, void **configured)
{
/* Only do comparisions, etc., if something was configured */
if (*configured == NULL) {
return;
}
/* If used community string from pdu, release it from session now */
if (strcmp((const char *)(*configured), "-c") == 0) {
free(session->community);
session->community = NULL;
session->community_len = 0;
}
free((u_char *)(*configured));
*configured = NULL;
}
void
init_proxy(void)
{
snmpd_register_config_handler("proxy", proxy_parse_config,
proxy_free_config,
"[snmpcmd args] host oid [remoteoid]");
}
void
shutdown_proxy(void)
{
proxy_free_config();
}
int
proxy_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_pdu *pdu;
struct simple_proxy *sp;
oid *ourname;
size_t ourlength;
netsnmp_request_info *request = requests;
u_char *configured = NULL;
DEBUGMSGTL(("proxy", "proxy handler starting, mode = %d\n",
reqinfo->mode));
switch (reqinfo->mode) {
case MODE_GET:
case MODE_GETNEXT:
case MODE_GETBULK: /* WWWXXX */
pdu = snmp_pdu_create(reqinfo->mode);
break;
case MODE_SET_ACTION:
pdu = snmp_pdu_create(SNMP_MSG_SET);
break;
case MODE_SET_UNDO:
/*
* If we set successfully (status == NOERROR),
* we can't back out again, so need to report the fact.
* If we failed to set successfully, then we're fine.
*/
for (request = requests; request; request=request->next) {
if (request->status == SNMP_ERR_NOERROR) {
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_UNDOFAILED);
return SNMP_ERR_UNDOFAILED;
}
}
return SNMP_ERR_NOERROR;
case MODE_SET_RESERVE1:
case MODE_SET_RESERVE2:
case MODE_SET_FREE:
case MODE_SET_COMMIT:
/*
* Nothing to do in this pass
*/
return SNMP_ERR_NOERROR;
default:
snmp_log(LOG_WARNING, "unsupported mode for proxy called (%d)\n",
reqinfo->mode);
return SNMP_ERR_NOERROR;
}
sp = (struct simple_proxy *) handler->myvoid;
if (!pdu || !sp) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_GENERR);
return SNMP_ERR_NOERROR;
}
while (request) {
ourname = request->requestvb->name;
ourlength = request->requestvb->name_length;
if (sp->base_len > 0) {
if ((ourlength - sp->name_len + sp->base_len) > MAX_OID_LEN) {
/*
* too large
*/
snmp_log(LOG_ERR,
"proxy oid request length is too long\n");
return SNMP_ERR_NOERROR;
}
/*
* suffix appended?
*/
DEBUGMSGTL(("proxy", "length=%d, base_len=%d, name_len=%d\n",
ourlength, sp->base_len, sp->name_len));
if (ourlength > (int) sp->name_len)
memcpy(&(sp->base[sp->base_len]), &(ourname[sp->name_len]),
sizeof(oid) * (ourlength - sp->name_len));
ourlength = ourlength - sp->name_len + sp->base_len;
ourname = sp->base;
}
snmp_pdu_add_variable(pdu, ourname, ourlength,
request->requestvb->type,
request->requestvb->val.string,
request->requestvb->val_len);
request->delegated = 1;
request = request->next;
}
/*
* Customize session parameters based on request information
*/
if (!proxy_fill_in_session(handler, reqinfo, (void **)&configured)) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_GENERR);
return SNMP_ERR_NOERROR;
}
/*
* send the request out
*/
DEBUGMSGTL(("proxy", "sending pdu\n"));
snmp_async_send(sp->sess, pdu, proxy_got_response,
netsnmp_create_delegated_cache(handler, reginfo,
reqinfo, requests,
(void *) sp));
/* Free any special parameters generated on the session */
proxy_free_filled_in_session_args(sp->sess, (void **)&configured);
return SNMP_ERR_NOERROR;
}
int
handle_agentx_packet(int operation, netsnmp_session * session, int reqid,
netsnmp_pdu *pdu, void *magic)
{
struct agent_netsnmp_set_info *asi = NULL;
snmp_callback mycallback;
netsnmp_pdu *internal_pdu = NULL;
void *retmagic = NULL;
ns_subagent_magic *smagic = NULL;
if (operation == NETSNMP_CALLBACK_OP_DISCONNECT) {
struct synch_state *state = (struct synch_state *) magic;
int period =
netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_PING_INTERVAL);
DEBUGMSGTL(("agentx/subagent",
"transport disconnect indication\n"));
/*
* deal with existing session. This happend if agentx sends
* a message to the master, but the master goes away before
* a response is sent. agentx will spin in snmp_synch_response_cb,
* waiting for a response. At the very least, the waiting
* flag must be set to break that loop. The rest is copied
* from disconnect handling in snmp_sync_input.
*/
if(state) {
state->waiting = 0;
state->pdu = NULL;
state->status = STAT_ERROR;
session->s_snmp_errno = SNMPERR_ABORT;
SET_SNMP_ERROR(SNMPERR_ABORT);
}
/*
* Deregister the ping alarm, if any, and invalidate all other
* references to this session.
*/
if (session->securityModel != SNMP_DEFAULT_SECMODEL) {
snmp_alarm_unregister(session->securityModel);
}
snmp_call_callbacks(SNMP_CALLBACK_APPLICATION,
SNMPD_CALLBACK_INDEX_STOP, (void *) session);
agentx_unregister_callbacks(session);
remove_trap_session(session);
register_mib_detach();
main_session = NULL;
if (period != 0) {
/*
* Pings are enabled, so periodically attempt to re-establish contact
* with the master agent. Don't worry about the handle,
* agentx_reopen_session unregisters itself if it succeeds in talking
* to the master agent.
*/
snmp_alarm_register(period, SA_REPEAT, agentx_reopen_session,
NULL);
}
return 0;
} else if (operation != NETSNMP_CALLBACK_OP_RECEIVED_MESSAGE) {
DEBUGMSGTL(("agentx/subagent", "unexpected callback op %d\n",
operation));
return 1;
}
/*
* ok, we have a pdu from the net. Modify as needed
*/
DEBUGMSGTL(("agentx/subagent", "handling agentx request (req=0x%x,trans="
"0x%x,sess=0x%x)\n", pdu->reqid,pdu->transid, pdu->sessid));
pdu->version = AGENTX_VERSION_1;
pdu->flags |= UCD_MSG_FLAG_ALWAYS_IN_VIEW;
if (pdu->command == AGENTX_MSG_GET
|| pdu->command == AGENTX_MSG_GETNEXT
|| pdu->command == AGENTX_MSG_GETBULK) {
smagic =
(ns_subagent_magic *) calloc(1, sizeof(ns_subagent_magic));
if (smagic == NULL) {
DEBUGMSGTL(("agentx/subagent", "couldn't malloc() smagic\n"));
return 1;
}
smagic->original_command = pdu->command;
smagic->session = session;
smagic->ovars = NULL;
retmagic = (void *) smagic;
}
switch (pdu->command) {
case AGENTX_MSG_GET:
DEBUGMSGTL(("agentx/subagent", " -> get\n"));
pdu->command = SNMP_MSG_GET;
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_GETNEXT:
DEBUGMSGTL(("agentx/subagent", " -> getnext\n"));
pdu->command = SNMP_MSG_GETNEXT;
/*
* We have to save a copy of the original variable list here because
* if the master agent has requested scoping for some of the varbinds
* that information is stored there.
*/
smagic->ovars = snmp_clone_varbind(pdu->variables);
DEBUGMSGTL(("agentx/subagent", "saved variables\n"));
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_GETBULK:
/*
* WWWXXX
*/
DEBUGMSGTL(("agentx/subagent", " -> getbulk\n"));
pdu->command = SNMP_MSG_GETBULK;
/*
* We have to save a copy of the original variable list here because
* if the master agent has requested scoping for some of the varbinds
* that information is stored there.
*/
smagic->ovars = snmp_clone_varbind(pdu->variables);
DEBUGMSGTL(("agentx/subagent", "saved variables at %p\n",
smagic->ovars));
mycallback = handle_subagent_response;
break;
case AGENTX_MSG_RESPONSE:
SNMP_FREE(smagic);
DEBUGMSGTL(("agentx/subagent", " -> response\n"));
return 1;
case AGENTX_MSG_TESTSET:
/*
* XXXWWW we have to map this twice to both RESERVE1 and RESERVE2
*/
DEBUGMSGTL(("agentx/subagent", " -> testset\n"));
asi = save_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "save_set_vars() failed\n");
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_RESERVE1;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_COMMITSET:
DEBUGMSGTL(("agentx/subagent", " -> commitset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
if (asi->mode != SNMP_MSG_INTERNAL_SET_RESERVE2) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING,
"dropping bad AgentX request (wrong mode %d)\n",
asi->mode);
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_ACTION;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_CLEANUPSET:
DEBUGMSGTL(("agentx/subagent", " -> cleanupset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
if (asi->mode == SNMP_MSG_INTERNAL_SET_RESERVE1 ||
asi->mode == SNMP_MSG_INTERNAL_SET_RESERVE2) {
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_FREE;
} else if (asi->mode == SNMP_MSG_INTERNAL_SET_ACTION) {
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_COMMIT;
} else {
snmp_log(LOG_WARNING,
"dropping bad AgentX request (wrong mode %d)\n",
asi->mode);
SNMP_FREE(retmagic);
return 1;
}
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
case AGENTX_MSG_UNDOSET:
DEBUGMSGTL(("agentx/subagent", " -> undoset\n"));
asi = restore_set_vars(session, pdu);
if (asi == NULL) {
SNMP_FREE(smagic);
snmp_log(LOG_WARNING, "restore_set_vars() failed\n");
return 1;
}
asi->mode = pdu->command = SNMP_MSG_INTERNAL_SET_UNDO;
mycallback = handle_subagent_set_response;
retmagic = asi;
break;
default:
SNMP_FREE(smagic);
DEBUGMSGTL(("agentx/subagent", " -> unknown command %d (%02x)\n",
pdu->command, pdu->command));
return 0;
}
/*
* submit the pdu to the internal handler
*/
/*
* We have to clone the PDU here, because when we return from this
* callback, sess_process_packet will free(pdu), but this call also
* free()s its argument PDU.
*/
internal_pdu = snmp_clone_pdu(pdu);
internal_pdu->contextName = internal_pdu->community;
internal_pdu->contextNameLen = internal_pdu->community_len;
internal_pdu->community = NULL;
internal_pdu->community_len = 0;
snmp_async_send(agentx_callback_sess, internal_pdu, mycallback,
retmagic);
return 1;
}
int
proxy_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_pdu *pdu;
struct simple_proxy *sp;
oid *ourname;
size_t ourlength;
netsnmp_request_info *request = requests;
DEBUGMSGTL(("proxy", "proxy handler starting, mode = %d\n",
reqinfo->mode));
switch (reqinfo->mode) {
case MODE_GET:
case MODE_GETNEXT:
case MODE_GETBULK: /* WWWXXX */
pdu = snmp_pdu_create(reqinfo->mode);
break;
case MODE_SET_COMMIT:
pdu = snmp_pdu_create(SNMP_MSG_SET);
break;
default:
snmp_log(LOG_WARNING, "unsupported mode for proxy called\n");
return SNMP_ERR_NOERROR;
}
sp = (struct simple_proxy *) handler->myvoid;
if (!pdu || !sp) {
netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_GENERR);
return SNMP_ERR_NOERROR;
}
while (request) {
ourname = request->requestvb->name;
ourlength = request->requestvb->name_length;
if (sp->base_len > 0) {
if ((ourlength - sp->name_len + sp->base_len) > MAX_OID_LEN) {
/*
* too large
*/
snmp_log(LOG_ERR,
"proxy oid request length is too long\n");
return SNMP_ERR_NOERROR;
}
/*
* suffix appended?
*/
DEBUGMSGTL(("proxy", "length=%d, base_len=%d, name_len=%d\n",
ourlength, sp->base_len, sp->name_len));
if (ourlength > (int) sp->name_len)
memcpy(&(sp->base[sp->base_len]), &(ourname[sp->name_len]),
sizeof(oid) * (ourlength - sp->name_len));
ourlength = ourlength - sp->name_len + sp->base_len;
ourname = sp->base;
}
snmp_pdu_add_variable(pdu, ourname, ourlength,
request->requestvb->type,
request->requestvb->val.string,
request->requestvb->val_len);
request->delegated = 1;
request = request->next;
}
/*
* send the request out
*/
DEBUGMSGTL(("proxy", "sending pdu\n"));
snmp_async_send(sp->sess, pdu, proxy_got_response,
netsnmp_create_delegated_cache(handler, reginfo,
reqinfo, requests,
(void *) sp));
return SNMP_ERR_NOERROR;
}
if ( template_pdu->command == SNMP_MSG_INFORM
#ifdef USING_AGENTX_PROTOCOL_MODULE
|| template_pdu->command == AGENTX_MSG_NOTIFY
#endif
) {
result =
snmp_async_send(sess, pdu, &handle_inform_response, NULL);
} else {
if ((sess->version == SNMP_VERSION_3) &&
(pdu->command == SNMP_MSG_TRAP2) &&
(sess->securityEngineIDLen == 0)) {
u_char tmp[SPRINT_MAX_LEN];
int len = snmpv3_get_engineID(tmp, sizeof(tmp));
memdup(&pdu->securityEngineID, tmp, len);
pdu->securityEngineIDLen = len;
}
result = snmp_send(sess, pdu);
}