[mirror_frr.git] / lib / agentx.c

/* SNMP support
 * Copyright (C) 2012 Vincent Bernat <bernat@luffy.cx>
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#ifdef SNMP_AGENTX
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/snmp_vars.h>

#include "command.h"
#include "smux.h"
#include "memory.h"
#include "linklist.h"
#include "version.h"
#include "lib_errors.h"
#include "xref.h"

XREF_SETUP()

static int agentx_enabled = 0;

static struct thread_master *agentx_tm;
static struct thread *timeout_thr = NULL;
static struct list *events = NULL;

static void agentx_events_update(void);

static int agentx_timeout(struct thread *t)
{
	timeout_thr = NULL;

	snmp_timeout();
	run_alarms();
	netsnmp_check_outstanding_agent_requests();
	agentx_events_update();
	return 0;
}

static int agentx_read(struct thread *t)
{
	fd_set fds;
	int flags, new_flags = 0;
	int nonblock = false;
	struct listnode *ln = THREAD_ARG(t);
	list_delete_node(events, ln);

	/* fix for non blocking socket */
	flags = fcntl(THREAD_FD(t), F_GETFL, 0);
	if (-1 == flags) {
		flog_err(EC_LIB_SYSTEM_CALL, "Failed to get FD settings fcntl: %s(%d)",
			 strerror(errno), errno);
		return -1;
	}

	if (flags & O_NONBLOCK)
		nonblock = true;
	else
		new_flags = fcntl(THREAD_FD(t), F_SETFL, flags | O_NONBLOCK);

	if (new_flags == -1)
		flog_err(EC_LIB_SYSTEM_CALL, "Failed to set snmp fd non blocking: %s(%d)",
			 strerror(errno), errno);

	FD_ZERO(&fds);
	FD_SET(THREAD_FD(t), &fds);
	snmp_read(&fds);

	/* Reset the flag */
	if (!nonblock) {
		new_flags = fcntl(THREAD_FD(t), F_SETFL, flags);

		if (new_flags == -1)
			flog_err(
				EC_LIB_SYSTEM_CALL,
				"Failed to set snmp fd back to original settings: %s(%d)",
				strerror(errno), errno);
	}

	netsnmp_check_outstanding_agent_requests();
	agentx_events_update();
	return 0;
}

static void agentx_events_update(void)
{
	int maxfd = 0;
	int block = 1;
	struct timeval timeout = {.tv_sec = 0, .tv_usec = 0};
	fd_set fds;
	struct listnode *ln;
	struct thread *thr;
	int fd, thr_fd;

	thread_cancel(&timeout_thr);

	FD_ZERO(&fds);
	snmp_select_info(&maxfd, &fds, &timeout, &block);

	if (!block) {
		timeout_thr = NULL;
		thread_add_timer_tv(agentx_tm, agentx_timeout, NULL, &timeout,
				    &timeout_thr);
	}

	ln = listhead(events);
	thr = ln ? listgetdata(ln) : NULL;
	thr_fd = thr ? THREAD_FD(thr) : -1;

	/* "two-pointer" / two-list simultaneous iteration
	 * ln/thr/thr_fd point to the next existing event listener to hit while
	 * fd counts to catch up */
	for (fd = 0; fd < maxfd; fd++) {
		/* caught up */
		if (thr_fd == fd) {
			struct listnode *nextln = listnextnode(ln);
			if (!FD_ISSET(fd, &fds)) {
				thread_cancel(&thr);
				list_delete_node(events, ln);
			}
			ln = nextln;
			thr = ln ? listgetdata(ln) : NULL;
			thr_fd = thr ? THREAD_FD(thr) : -1;
		}
		/* need listener, but haven't hit one where it would be */
		else if (FD_ISSET(fd, &fds)) {
			struct listnode *newln;
			thr = NULL;
			thread_add_read(agentx_tm, agentx_read, NULL, fd, &thr);
			newln = listnode_add_before(events, ln, thr);
			thr->arg = newln;
		}
	}

	/* leftover event listeners at this point have fd > maxfd, delete them
	 */
	while (ln) {
		struct listnode *nextln = listnextnode(ln);
		thr = listgetdata(ln);
		thread_cancel(&thr);
		list_delete_node(events, ln);
		ln = nextln;
	}
}

/* AgentX node. */
static int config_write_agentx(struct vty *vty);
static struct cmd_node agentx_node = {
	.name = "smux",
	.node = SMUX_NODE,
	.prompt = "",
	.config_write = config_write_agentx,
};

/* Logging NetSNMP messages */
static int agentx_log_callback(int major, int minor, void *serverarg,
			       void *clientarg)
{
	struct snmp_log_message *slm = (struct snmp_log_message *)serverarg;
	char *msg = XSTRDUP(MTYPE_TMP, slm->msg);
	if (msg)
		msg[strlen(msg) - 1] = '\0';
	switch (slm->priority) {
	case LOG_EMERG:
		flog_err(EC_LIB_SNMP, "snmp[emerg]: %s", msg ? msg : slm->msg);
		break;
	case LOG_ALERT:
		flog_err(EC_LIB_SNMP, "snmp[alert]: %s", msg ? msg : slm->msg);
		break;
	case LOG_CRIT:
		flog_err(EC_LIB_SNMP, "snmp[crit]: %s", msg ? msg : slm->msg);
		break;
	case LOG_ERR:
		flog_err(EC_LIB_SNMP, "snmp[err]: %s", msg ? msg : slm->msg);
		break;
	case LOG_WARNING:
		flog_warn(EC_LIB_SNMP, "snmp[warning]: %s",
			  msg ? msg : slm->msg);
		break;
	case LOG_NOTICE:
		zlog_notice("snmp[notice]: %s", msg ? msg : slm->msg);
		break;
	case LOG_INFO:
		zlog_info("snmp[info]: %s", msg ? msg : slm->msg);
		break;
	case LOG_DEBUG:
		zlog_debug("snmp[debug]: %s", msg ? msg : slm->msg);
		break;
	}
	XFREE(MTYPE_TMP, msg);
	return SNMP_ERR_NOERROR;
}

static int config_write_agentx(struct vty *vty)
{
	if (agentx_enabled)
		vty_out(vty, "agentx\n");
	return 1;
}

DEFUN (agentx_enable,
       agentx_enable_cmd,
       "agentx",
       "SNMP AgentX protocol settings\n")
{
	if (!agentx_enabled) {
		init_snmp(FRR_SMUX_NAME);
		events = list_new();
		agentx_events_update();
		agentx_enabled = 1;
	}

	return CMD_SUCCESS;
}

DEFUN (no_agentx,
       no_agentx_cmd,
       "no agentx",
       NO_STR
       "SNMP AgentX protocol settings\n")
{
	if (!agentx_enabled)
		return CMD_SUCCESS;
	vty_out(vty, "SNMP AgentX support cannot be disabled once enabled\n");
	return CMD_WARNING_CONFIG_FAILED;
}

void smux_init(struct thread_master *tm)
{
	agentx_tm = tm;

	netsnmp_enable_subagent();
	snmp_disable_log();
	snmp_enable_calllog();
	snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING,
			       agentx_log_callback, NULL);
	init_agent(FRR_SMUX_NAME);

	install_node(&agentx_node);
	install_element(CONFIG_NODE, &agentx_enable_cmd);
	install_element(CONFIG_NODE, &no_agentx_cmd);
}

void smux_register_mib(const char *descr, struct variable *var, size_t width,
		       int num, oid name[], size_t namelen)
{
	register_mib(descr, var, width, num, name, namelen);
}

int smux_trap(struct variable *vp, size_t vp_len, const oid *ename,
	      size_t enamelen, const oid *name, size_t namelen,
	      const oid *iname, size_t inamelen,
	      const struct trap_object *trapobj, size_t trapobjlen,
	      uint8_t sptrap)
{
	struct index_oid trap_index[1];

	/* copy the single index into the multi-index format */
	oid_copy(trap_index[0].indexname, iname, inamelen);
	trap_index[0].indexlen = inamelen;

	return (smux_trap_multi_index(
		vp, vp_len, ename, enamelen, name, namelen, trap_index,
		array_size(trap_index), trapobj, trapobjlen, sptrap));
}

int smux_trap_multi_index(struct variable *vp, size_t vp_len, const oid *ename,
			  size_t enamelen, const oid *name, size_t namelen,
			  struct index_oid *iname, size_t index_len,
			  const struct trap_object *trapobj, size_t trapobjlen,
			  uint8_t sptrap)
{
	oid objid_snmptrap[] = {1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0};
	size_t objid_snmptrap_len = sizeof(objid_snmptrap) / sizeof(oid);
	oid notification_oid[MAX_OID_LEN];
	size_t notification_oid_len;
	unsigned int i;

	netsnmp_variable_list *notification_vars = NULL;
	if (!agentx_enabled)
		return 0;

	/* snmpTrapOID */
	oid_copy(notification_oid, ename, enamelen);
	notification_oid[enamelen] = sptrap;
	notification_oid_len = enamelen + 1;
	snmp_varlist_add_variable(&notification_vars, objid_snmptrap,
				  objid_snmptrap_len, ASN_OBJECT_ID,
				  (uint8_t *)notification_oid,
				  notification_oid_len * sizeof(oid));

	/* Provided bindings */
	for (i = 0; i < trapobjlen; i++) {
		unsigned int j;
		oid oid[MAX_OID_LEN];
		size_t oid_len, onamelen;
		uint8_t *val;
		size_t val_len;
		WriteMethod *wm = NULL;
		struct variable cvp;
		unsigned int iindex;
		/*
		 * this allows the behaviour of smux_trap with a singe index
		 * for all objects to be maintained whilst allowing traps which
		 * have different indices per object to be supported
		 */
		iindex = (index_len == 1) ? 0 : i;

		/* Make OID. */
		if (trapobj[i].namelen > 0) {
			/* Columnar object */
			onamelen = trapobj[i].namelen;
			oid_copy(oid, name, namelen);
			oid_copy(oid + namelen, trapobj[i].name, onamelen);
			oid_copy(oid + namelen + onamelen,
				 iname[iindex].indexname,
				 iname[iindex].indexlen);
			oid_len = namelen + onamelen + iname[iindex].indexlen;
		} else {
			/* Scalar object */
			onamelen = trapobj[i].namelen * (-1);
			oid_copy(oid, name, namelen);
			oid_copy(oid + namelen, trapobj[i].name, onamelen);
			oid[onamelen + namelen] = 0;
			oid_len = namelen + onamelen + 1;
		}

		/* Locate the appropriate function and type in the MIB registry.
		 */
		for (j = 0; j < vp_len; j++) {
			if (oid_compare(trapobj[i].name, onamelen, vp[j].name,
					vp[j].namelen)
			    != 0)
				continue;
			/* We found the appropriate variable in the MIB
			 * registry. */
			oid_copy(cvp.name, name, namelen);
			oid_copy(cvp.name + namelen, vp[j].name, vp[j].namelen);
			cvp.namelen = namelen + vp[j].namelen;
			cvp.type = vp[j].type;
			cvp.magic = vp[j].magic;
			cvp.acl = vp[j].acl;
			cvp.findVar = vp[j].findVar;

			/* Grab the result. */
			val = cvp.findVar(&cvp, oid, &oid_len, 1, &val_len,
					  &wm);
			if (!val)
				break;
			snmp_varlist_add_variable(&notification_vars, oid,
						  oid_len, vp[j].type, val,
						  val_len);
			break;
		}
	}


	send_v2trap(notification_vars);
	snmp_free_varbind(notification_vars);
	agentx_events_update();
	return 1;
}

#endif /* SNMP_AGENTX */
Commit	Line	Data
d6be5fb9 VB	1	/* SNMP support
	2	* Copyright (C) 2012 Vincent Bernat <bernat@luffy.cx>
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
896014f4 DL	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
d6be5fb9 VB	19	*/
	20
	21	#include <zebra.h>
	22
5986b66b	23	#ifdef SNMP_AGENTX
d6be5fb9 VB	24	#include <net-snmp/net-snmp-config.h>
d6be5fb9 VB	25	#include <net-snmp/net-snmp-includes.h>
56e2c5e8 DL	26	#include <net-snmp/agent/net-snmp-agent-includes.h>
56e2c5e8 DL	27	#include <net-snmp/agent/snmp_vars.h>
d6be5fb9 VB	28
	29	#include "command.h"
	30	#include "smux.h"
d11f748b	31	#include "memory.h"
56e2c5e8	32	#include "linklist.h"
ae435b19	33	#include "version.h"
220d7368	34	#include "lib_errors.h"
b2fa8c0f DL	35	#include "xref.h"
	36
	37	XREF_SETUP()
d6be5fb9	38
56e2c5e8 DL	39	static int agentx_enabled = 0;
	40
	41	static struct thread_master *agentx_tm;
	42	static struct thread *timeout_thr = NULL;
	43	static struct list *events = NULL;
	44
	45	static void agentx_events_update(void);
	46
d62a17ae	47	static int agentx_timeout(struct thread *t)
56e2c5e8	48	{
d62a17ae	49	timeout_thr = NULL;
56e2c5e8	50
d62a17ae	51	snmp_timeout();
	52	run_alarms();
	53	netsnmp_check_outstanding_agent_requests();
	54	agentx_events_update();
	55	return 0;
56e2c5e8 DL	56	}
56e2c5e8 DL	57
d62a17ae	58	static int agentx_read(struct thread *t)
56e2c5e8	59	{
d62a17ae	60	fd_set fds;
19d95d40	61	int flags, new_flags = 0;
3b717261	62	int nonblock = false;
d62a17ae	63	struct listnode *ln = THREAD_ARG(t);
d62a17ae	64	list_delete_node(events, ln);
56e2c5e8	65
3b717261	66	/* fix for non blocking socket */
3b717261	67	flags = fcntl(THREAD_FD(t), F_GETFL, 0);
19d95d40 DS	68	if (-1 == flags) {
	69	flog_err(EC_LIB_SYSTEM_CALL, "Failed to get FD settings fcntl: %s(%d)",
	70	strerror(errno), errno);
3b717261	71	return -1;
19d95d40	72	}
3b717261	73
	74	if (flags & O_NONBLOCK)
	75	nonblock = true;
	76	else
19d95d40 DS	77	new_flags = fcntl(THREAD_FD(t), F_SETFL, flags \| O_NONBLOCK);
	78
	79	if (new_flags == -1)
	80	flog_err(EC_LIB_SYSTEM_CALL, "Failed to set snmp fd non blocking: %s(%d)",
	81	strerror(errno), errno);
3b717261	82
d62a17ae	83	FD_ZERO(&fds);
	84	FD_SET(THREAD_FD(t), &fds);
	85	snmp_read(&fds);
56e2c5e8	86
3b717261	87	/* Reset the flag */
19d95d40 DS	88	if (!nonblock) {
	89	new_flags = fcntl(THREAD_FD(t), F_SETFL, flags);
	90
	91	if (new_flags == -1)
	92	flog_err(
	93	EC_LIB_SYSTEM_CALL,
	94	"Failed to set snmp fd back to original settings: %s(%d)",
	95	strerror(errno), errno);
	96	}
3b717261	97
d62a17ae	98	netsnmp_check_outstanding_agent_requests();
	99	agentx_events_update();
	100	return 0;
56e2c5e8 DL	101	}
56e2c5e8 DL	102
d62a17ae	103	static void agentx_events_update(void)
56e2c5e8	104	{
d62a17ae	105	int maxfd = 0;
	106	int block = 1;
	107	struct timeval timeout = {.tv_sec = 0, .tv_usec = 0};
	108	fd_set fds;
	109	struct listnode *ln;
	110	struct thread *thr;
	111	int fd, thr_fd;
	112
50478845	113	thread_cancel(&timeout_thr);
d62a17ae	114
	115	FD_ZERO(&fds);
	116	snmp_select_info(&maxfd, &fds, &timeout, &block);
	117
	118	if (!block) {
	119	timeout_thr = NULL;
	120	thread_add_timer_tv(agentx_tm, agentx_timeout, NULL, &timeout,
	121	&timeout_thr);
	122	}
	123
	124	ln = listhead(events);
	125	thr = ln ? listgetdata(ln) : NULL;
	126	thr_fd = thr ? THREAD_FD(thr) : -1;
	127
	128	/* "two-pointer" / two-list simultaneous iteration
	129	* ln/thr/thr_fd point to the next existing event listener to hit while
	130	* fd counts to catch up */
	131	for (fd = 0; fd < maxfd; fd++) {
	132	/* caught up */
	133	if (thr_fd == fd) {
	134	struct listnode *nextln = listnextnode(ln);
	135	if (!FD_ISSET(fd, &fds)) {
b3d6bc6e	136	thread_cancel(&thr);
d62a17ae	137	list_delete_node(events, ln);
	138	}
	139	ln = nextln;
	140	thr = ln ? listgetdata(ln) : NULL;
	141	thr_fd = thr ? THREAD_FD(thr) : -1;
	142	}
	143	/* need listener, but haven't hit one where it would be */
	144	else if (FD_ISSET(fd, &fds)) {
	145	struct listnode *newln;
	146	thr = NULL;
	147	thread_add_read(agentx_tm, agentx_read, NULL, fd, &thr);
	148	newln = listnode_add_before(events, ln, thr);
	149	thr->arg = newln;
	150	}
	151	}
	152
	153	/* leftover event listeners at this point have fd > maxfd, delete them
	154	*/
	155	while (ln) {
	156	struct listnode *nextln = listnextnode(ln);
b3d6bc6e MS	157	thr = listgetdata(ln);
b3d6bc6e MS	158	thread_cancel(&thr);
d62a17ae	159	list_delete_node(events, ln);
	160	ln = nextln;
	161	}
56e2c5e8	162	}
d6be5fb9 VB	163
d6be5fb9 VB	164	/* AgentX node. */
612c2c15	165	static int config_write_agentx(struct vty *vty);
62b346ee	166	static struct cmd_node agentx_node = {
f4b8291f	167	.name = "smux",
62b346ee DL	168	.node = SMUX_NODE,
62b346ee DL	169	.prompt = "",
612c2c15	170	.config_write = config_write_agentx,
62b346ee	171	};
d6be5fb9 VB	172
d6be5fb9 VB	173	/* Logging NetSNMP messages */
d62a17ae	174	static int agentx_log_callback(int major, int minor, void *serverarg,
d62a17ae	175	void *clientarg)
d6be5fb9	176	{
d62a17ae	177	struct snmp_log_message slm = (struct snmp_log_message )serverarg;
	178	char *msg = XSTRDUP(MTYPE_TMP, slm->msg);
	179	if (msg)
	180	msg[strlen(msg) - 1] = '\0';
	181	switch (slm->priority) {
	182	case LOG_EMERG:
1c50c1c0	183	flog_err(EC_LIB_SNMP, "snmp[emerg]: %s", msg ? msg : slm->msg);
d62a17ae	184	break;
d62a17ae	185	case LOG_ALERT:
1c50c1c0	186	flog_err(EC_LIB_SNMP, "snmp[alert]: %s", msg ? msg : slm->msg);
d62a17ae	187	break;
d62a17ae	188	case LOG_CRIT:
1c50c1c0	189	flog_err(EC_LIB_SNMP, "snmp[crit]: %s", msg ? msg : slm->msg);
d62a17ae	190	break;
d62a17ae	191	case LOG_ERR:
1c50c1c0	192	flog_err(EC_LIB_SNMP, "snmp[err]: %s", msg ? msg : slm->msg);
d62a17ae	193	break;
d62a17ae	194	case LOG_WARNING:
450971aa	195	flog_warn(EC_LIB_SNMP, "snmp[warning]: %s",
ade6974d	196	msg ? msg : slm->msg);
d62a17ae	197	break;
	198	case LOG_NOTICE:
	199	zlog_notice("snmp[notice]: %s", msg ? msg : slm->msg);
	200	break;
	201	case LOG_INFO:
	202	zlog_info("snmp[info]: %s", msg ? msg : slm->msg);
	203	break;
	204	case LOG_DEBUG:
	205	zlog_debug("snmp[debug]: %s", msg ? msg : slm->msg);
	206	break;
	207	}
	208	XFREE(MTYPE_TMP, msg);
	209	return SNMP_ERR_NOERROR;
d6be5fb9 VB	210	}
d6be5fb9 VB	211
d62a17ae	212	static int config_write_agentx(struct vty *vty)
d6be5fb9	213	{
d62a17ae	214	if (agentx_enabled)
	215	vty_out(vty, "agentx\n");
	216	return 1;
d6be5fb9 VB	217	}
	218
	219	DEFUN (agentx_enable,
	220	agentx_enable_cmd,
	221	"agentx",
007b0667	222	"SNMP AgentX protocol settings\n")
d6be5fb9	223	{
d62a17ae	224	if (!agentx_enabled) {
	225	init_snmp(FRR_SMUX_NAME);
	226	events = list_new();
	227	agentx_events_update();
	228	agentx_enabled = 1;
d62a17ae	229	}
5fedee18	230
d62a17ae	231	return CMD_SUCCESS;
d6be5fb9 VB	232	}
	233
	234	DEFUN (no_agentx,
	235	no_agentx_cmd,
	236	"no agentx",
	237	NO_STR
007b0667	238	"SNMP AgentX protocol settings\n")
d6be5fb9	239	{
d62a17ae	240	if (!agentx_enabled)
	241	return CMD_SUCCESS;
	242	vty_out(vty, "SNMP AgentX support cannot be disabled once enabled\n");
	243	return CMD_WARNING_CONFIG_FAILED;
d6be5fb9 VB	244	}
d6be5fb9 VB	245
d62a17ae	246	void smux_init(struct thread_master *tm)
d6be5fb9	247	{
d62a17ae	248	agentx_tm = tm;
	249
	250	netsnmp_enable_subagent();
	251	snmp_disable_log();
	252	snmp_enable_calllog();
	253	snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING,
	254	agentx_log_callback, NULL);
	255	init_agent(FRR_SMUX_NAME);
	256
612c2c15	257	install_node(&agentx_node);
d62a17ae	258	install_element(CONFIG_NODE, &agentx_enable_cmd);
d62a17ae	259	install_element(CONFIG_NODE, &no_agentx_cmd);
d6be5fb9 VB	260	}
d6be5fb9 VB	261
d62a17ae	262	void smux_register_mib(const char descr, struct variable var, size_t width,
d62a17ae	263	int num, oid name[], size_t namelen)
d6be5fb9	264	{
d62a17ae	265	register_mib(descr, var, width, num, name, namelen);
d6be5fb9 VB	266	}
d6be5fb9 VB	267
d62a17ae	268	int smux_trap(struct variable vp, size_t vp_len, const oid ename,
	269	size_t enamelen, const oid *name, size_t namelen,
	270	const oid *iname, size_t inamelen,
	271	const struct trap_object *trapobj, size_t trapobjlen,
d7c0a89a	272	uint8_t sptrap)
4eb8c74f PR	273	{
	274	struct index_oid trap_index[1];
	275
	276	/* copy the single index into the multi-index format */
	277	oid_copy(trap_index[0].indexname, iname, inamelen);
	278	trap_index[0].indexlen = inamelen;
	279
	280	return (smux_trap_multi_index(
	281	vp, vp_len, ename, enamelen, name, namelen, trap_index,
	282	array_size(trap_index), trapobj, trapobjlen, sptrap));
	283	}
	284
	285	int smux_trap_multi_index(struct variable vp, size_t vp_len, const oid ename,
	286	size_t enamelen, const oid *name, size_t namelen,
	287	struct index_oid *iname, size_t index_len,
	288	const struct trap_object *trapobj, size_t trapobjlen,
	289	uint8_t sptrap)
d6be5fb9	290	{
d62a17ae	291	oid objid_snmptrap[] = {1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0};
0d6f7fd6	292	size_t objid_snmptrap_len = sizeof(objid_snmptrap) / sizeof(oid);
d62a17ae	293	oid notification_oid[MAX_OID_LEN];
	294	size_t notification_oid_len;
	295	unsigned int i;
	296
	297	netsnmp_variable_list *notification_vars = NULL;
	298	if (!agentx_enabled)
	299	return 0;
	300
	301	/* snmpTrapOID */
	302	oid_copy(notification_oid, ename, enamelen);
	303	notification_oid[enamelen] = sptrap;
	304	notification_oid_len = enamelen + 1;
	305	snmp_varlist_add_variable(&notification_vars, objid_snmptrap,
	306	objid_snmptrap_len, ASN_OBJECT_ID,
d7c0a89a	307	(uint8_t *)notification_oid,
d62a17ae	308	notification_oid_len * sizeof(oid));
	309
	310	/* Provided bindings */
	311	for (i = 0; i < trapobjlen; i++) {
	312	unsigned int j;
	313	oid oid[MAX_OID_LEN];
	314	size_t oid_len, onamelen;
d7c0a89a	315	uint8_t *val;
d62a17ae	316	size_t val_len;
	317	WriteMethod *wm = NULL;
	318	struct variable cvp;
4eb8c74f PR	319	unsigned int iindex;
	320	/*
	321	* this allows the behaviour of smux_trap with a singe index
	322	* for all objects to be maintained whilst allowing traps which
	323	* have different indices per object to be supported
	324	*/
	325	iindex = (index_len == 1) ? 0 : i;
d62a17ae	326
	327	/* Make OID. */
	328	if (trapobj[i].namelen > 0) {
	329	/* Columnar object */
	330	onamelen = trapobj[i].namelen;
	331	oid_copy(oid, name, namelen);
	332	oid_copy(oid + namelen, trapobj[i].name, onamelen);
4eb8c74f PR	333	oid_copy(oid + namelen + onamelen,
	334	iname[iindex].indexname,
	335	iname[iindex].indexlen);
	336	oid_len = namelen + onamelen + iname[iindex].indexlen;
d62a17ae	337	} else {
	338	/* Scalar object */
	339	onamelen = trapobj[i].namelen * (-1);
	340	oid_copy(oid, name, namelen);
	341	oid_copy(oid + namelen, trapobj[i].name, onamelen);
	342	oid[onamelen + namelen] = 0;
	343	oid_len = namelen + onamelen + 1;
	344	}
	345
	346	/* Locate the appropriate function and type in the MIB registry.
	347	*/
	348	for (j = 0; j < vp_len; j++) {
	349	if (oid_compare(trapobj[i].name, onamelen, vp[j].name,
	350	vp[j].namelen)
	351	!= 0)
	352	continue;
	353	/* We found the appropriate variable in the MIB
	354	* registry. */
	355	oid_copy(cvp.name, name, namelen);
	356	oid_copy(cvp.name + namelen, vp[j].name, vp[j].namelen);
	357	cvp.namelen = namelen + vp[j].namelen;
	358	cvp.type = vp[j].type;
	359	cvp.magic = vp[j].magic;
	360	cvp.acl = vp[j].acl;
	361	cvp.findVar = vp[j].findVar;
4eb8c74f	362
d62a17ae	363	/* Grab the result. */
	364	val = cvp.findVar(&cvp, oid, &oid_len, 1, &val_len,
	365	&wm);
	366	if (!val)
	367	break;
	368	snmp_varlist_add_variable(&notification_vars, oid,
	369	oid_len, vp[j].type, val,
	370	val_len);
	371	break;
	372	}
b7c0d065	373	}
b7c0d065 VB	374
b7c0d065 VB	375
d62a17ae	376	send_v2trap(notification_vars);
	377	snmp_free_varbind(notification_vars);
	378	agentx_events_update();
	379	return 1;
d6be5fb9 VB	380	}
d6be5fb9 VB	381
5986b66b	382	#endif /* SNMP_AGENTX */