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freebsd-dev/contrib/bsnmp/snmpd/trap.c
Shteryana Shopova 72cd7a520d Bring in a SNMP module that allows configuration of SNMPv3 Notification targets. 
Sponsored by:	The FreeBSD Foundation
Reviewed by:	philip
Approved by:	philip
2010-12-20 17:13:14 +00:00

917 lines
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/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* Copyright (c) 2010 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Shteryana Sotirova Shopova
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Begemot: bsnmp/snmpd/trap.c,v 1.9 2005/10/04 11:21:39 brandt_h Exp $
*
* TrapSinkTable
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <syslog.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "snmpmod.h"
#include "snmpd.h"
#include "tree.h"
#include "oid.h"
struct trapsink_list trapsink_list = TAILQ_HEAD_INITIALIZER(trapsink_list);
/* List of target addresses */
struct target_addresslist target_addresslist =
SLIST_HEAD_INITIALIZER(target_addresslist);
/* List of target parameters */
struct target_paramlist target_paramlist =
SLIST_HEAD_INITIALIZER(target_paramlist);
/* List of notification targets */
struct target_notifylist target_notifylist =
SLIST_HEAD_INITIALIZER(target_notifylist);
static const struct asn_oid oid_begemotTrapSinkTable =
OIDX_begemotTrapSinkTable;
static const struct asn_oid oid_sysUpTime = OIDX_sysUpTime;
static const struct asn_oid oid_snmpTrapOID = OIDX_snmpTrapOID;
struct trapsink_dep {
struct snmp_dependency dep;
u_int set;
u_int status;
u_char comm[SNMP_COMMUNITY_MAXLEN + 1];
u_int version;
u_int rb;
u_int rb_status;
u_int rb_version;
u_char rb_comm[SNMP_COMMUNITY_MAXLEN + 1];
};
enum {
TDEP_STATUS = 0x0001,
TDEP_COMM = 0x0002,
TDEP_VERSION = 0x0004,
TDEP_CREATE = 0x0001,
TDEP_MODIFY = 0x0002,
TDEP_DESTROY = 0x0004,
};
static int
trapsink_create(struct trapsink_dep *tdep)
{
struct trapsink *t;
struct sockaddr_in sa;
if ((t = malloc(sizeof(*t))) == NULL)
return (SNMP_ERR_RES_UNAVAIL);
t->index = tdep->dep.idx;
t->status = TRAPSINK_NOT_READY;
t->comm[0] = '\0';
t->version = TRAPSINK_V2;
if ((t->socket = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
syslog(LOG_ERR, "socket(UDP): %m");
free(t);
return (SNMP_ERR_RES_UNAVAIL);
}
(void)shutdown(t->socket, SHUT_RD);
sa.sin_len = sizeof(sa);
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = htonl((t->index.subs[0] << 24) |
(t->index.subs[1] << 16) | (t->index.subs[2] << 8) |
(t->index.subs[3] << 0));
sa.sin_port = htons(t->index.subs[4]);
if (connect(t->socket, (struct sockaddr *)&sa, sa.sin_len) == -1) {
syslog(LOG_ERR, "connect(%s,%u): %m",
inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
(void)close(t->socket);
free(t);
return (SNMP_ERR_GENERR);
}
if (tdep->set & TDEP_VERSION)
t->version = tdep->version;
if (tdep->set & TDEP_COMM)
strcpy(t->comm, tdep->comm);
if (t->comm[0] != '\0')
t->status = TRAPSINK_NOT_IN_SERVICE;
/* look whether we should activate */
if (tdep->status == 4) {
if (t->status == TRAPSINK_NOT_READY) {
if (t->socket != -1)
(void)close(t->socket);
free(t);
return (SNMP_ERR_INCONS_VALUE);
}
t->status = TRAPSINK_ACTIVE;
}
INSERT_OBJECT_OID(t, &trapsink_list);
tdep->rb |= TDEP_CREATE;
return (SNMP_ERR_NOERROR);
}
static void
trapsink_free(struct trapsink *t)
{
TAILQ_REMOVE(&trapsink_list, t, link);
if (t->socket != -1)
(void)close(t->socket);
free(t);
}
static int
trapsink_modify(struct trapsink *t, struct trapsink_dep *tdep)
{
tdep->rb_status = t->status;
tdep->rb_version = t->version;
strcpy(tdep->rb_comm, t->comm);
if (tdep->set & TDEP_STATUS) {
/* if we are active and should move to not_in_service do
* this first */
if (tdep->status == 2 && tdep->rb_status == TRAPSINK_ACTIVE) {
t->status = TRAPSINK_NOT_IN_SERVICE;
tdep->rb |= TDEP_MODIFY;
}
}
if (tdep->set & TDEP_VERSION)
t->version = tdep->version;
if (tdep->set & TDEP_COMM)
strcpy(t->comm, tdep->comm);
if (tdep->set & TDEP_STATUS) {
/* if we were inactive and should go active - do this now */
if (tdep->status == 1 && tdep->rb_status != TRAPSINK_ACTIVE) {
if (t->comm[0] == '\0') {
t->status = tdep->rb_status;
t->version = tdep->rb_version;
strcpy(t->comm, tdep->rb_comm);
return (SNMP_ERR_INCONS_VALUE);
}
t->status = TRAPSINK_ACTIVE;
tdep->rb |= TDEP_MODIFY;
}
}
return (SNMP_ERR_NOERROR);
}
static int
trapsink_unmodify(struct trapsink *t, struct trapsink_dep *tdep)
{
if (tdep->set & TDEP_STATUS)
t->status = tdep->rb_status;
if (tdep->set & TDEP_VERSION)
t->version = tdep->rb_version;
if (tdep->set & TDEP_COMM)
strcpy(t->comm, tdep->rb_comm);
return (SNMP_ERR_NOERROR);
}
static int
trapsink_destroy(struct snmp_context *ctx __unused, struct trapsink *t,
struct trapsink_dep *tdep)
{
t->status = TRAPSINK_DESTROY;
tdep->rb_status = t->status;
tdep->rb |= TDEP_DESTROY;
return (SNMP_ERR_NOERROR);
}
static int
trapsink_undestroy(struct trapsink *t, struct trapsink_dep *tdep)
{
t->status = tdep->rb_status;
return (SNMP_ERR_NOERROR);
}
static int
trapsink_dep(struct snmp_context *ctx, struct snmp_dependency *dep,
enum snmp_depop op)
{
struct trapsink_dep *tdep = (struct trapsink_dep *)dep;
struct trapsink *t;
t = FIND_OBJECT_OID(&trapsink_list, &dep->idx, 0);
switch (op) {
case SNMP_DEPOP_COMMIT:
if (tdep->set & TDEP_STATUS) {
switch (tdep->status) {
case 1:
case 2:
if (t == NULL)
return (SNMP_ERR_INCONS_VALUE);
return (trapsink_modify(t, tdep));
case 4:
case 5:
if (t != NULL)
return (SNMP_ERR_INCONS_VALUE);
return (trapsink_create(tdep));
case 6:
if (t == NULL)
return (SNMP_ERR_NOERROR);
return (trapsink_destroy(ctx, t, tdep));
}
} else if (tdep->set != 0)
return (trapsink_modify(t, tdep));
return (SNMP_ERR_NOERROR);
case SNMP_DEPOP_ROLLBACK:
if (tdep->rb & TDEP_CREATE) {
trapsink_free(t);
return (SNMP_ERR_NOERROR);
}
if (tdep->rb & TDEP_MODIFY)
return (trapsink_unmodify(t, tdep));
if(tdep->rb & TDEP_DESTROY)
return (trapsink_undestroy(t, tdep));
return (SNMP_ERR_NOERROR);
case SNMP_DEPOP_FINISH:
if ((tdep->rb & TDEP_DESTROY) && t != NULL &&
ctx->code == SNMP_RET_OK)
trapsink_free(t);
return (SNMP_ERR_NOERROR);
}
abort();
}
int
op_trapsink(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx, enum snmp_op op)
{
struct trapsink *t;
u_char ipa[4];
int32_t port;
struct asn_oid idx;
struct trapsink_dep *tdep;
u_char *p;
t = NULL; /* gcc */
switch (op) {
case SNMP_OP_GETNEXT:
if ((t = NEXT_OBJECT_OID(&trapsink_list, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
index_append(&value->var, sub, &t->index);
break;
case SNMP_OP_GET:
if ((t = FIND_OBJECT_OID(&trapsink_list, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
if (index_decode(&value->var, sub, iidx, ipa, &port) ||
port == 0 || port > 65535)
return (SNMP_ERR_NO_CREATION);
t = FIND_OBJECT_OID(&trapsink_list, &value->var, sub);
asn_slice_oid(&idx, &value->var, sub, value->var.len);
tdep = (struct trapsink_dep *)snmp_dep_lookup(ctx,
&oid_begemotTrapSinkTable, &idx,
sizeof(*tdep), trapsink_dep);
if (tdep == NULL)
return (SNMP_ERR_RES_UNAVAIL);
switch (value->var.subs[sub - 1]) {
case LEAF_begemotTrapSinkStatus:
if (tdep->set & TDEP_STATUS)
return (SNMP_ERR_INCONS_VALUE);
switch (value->v.integer) {
case 1:
case 2:
if (t == NULL)
return (SNMP_ERR_INCONS_VALUE);
break;
case 4:
case 5:
if (t != NULL)
return (SNMP_ERR_INCONS_VALUE);
break;
case 6:
break;
default:
return (SNMP_ERR_WRONG_VALUE);
}
tdep->status = value->v.integer;
tdep->set |= TDEP_STATUS;
return (SNMP_ERR_NOERROR);
case LEAF_begemotTrapSinkComm:
if (tdep->set & TDEP_COMM)
return (SNMP_ERR_INCONS_VALUE);
if (value->v.octetstring.len == 0 ||
value->v.octetstring.len > SNMP_COMMUNITY_MAXLEN)
return (SNMP_ERR_WRONG_VALUE);
for (p = value->v.octetstring.octets;
p < value->v.octetstring.octets + value->v.octetstring.len;
p++) {
if (!isascii(*p) || !isprint(*p))
return (SNMP_ERR_WRONG_VALUE);
}
tdep->set |= TDEP_COMM;
strncpy(tdep->comm, value->v.octetstring.octets,
value->v.octetstring.len);
tdep->comm[value->v.octetstring.len] = '\0';
return (SNMP_ERR_NOERROR);
case LEAF_begemotTrapSinkVersion:
if (tdep->set & TDEP_VERSION)
return (SNMP_ERR_INCONS_VALUE);
if (value->v.integer != TRAPSINK_V1 &&
value->v.integer != TRAPSINK_V2)
return (SNMP_ERR_WRONG_VALUE);
tdep->version = value->v.integer;
tdep->set |= TDEP_VERSION;
return (SNMP_ERR_NOERROR);
}
if (t == NULL)
return (SNMP_ERR_INCONS_NAME);
else
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
return (SNMP_ERR_NOERROR);
}
switch (value->var.subs[sub - 1]) {
case LEAF_begemotTrapSinkStatus:
value->v.integer = t->status;
break;
case LEAF_begemotTrapSinkComm:
return (string_get(value, t->comm, -1));
case LEAF_begemotTrapSinkVersion:
value->v.integer = t->version;
break;
}
return (SNMP_ERR_NOERROR);
}
static void
snmp_create_v1_trap(struct snmp_pdu *pdu, char *com,
const struct asn_oid *trap_oid)
{
memset(pdu, 0, sizeof(*pdu));
strcpy(pdu->community, com);
pdu->version = SNMP_V1;
pdu->type = SNMP_PDU_TRAP;
pdu->enterprise = systemg.object_id;
memcpy(pdu->agent_addr, snmpd.trap1addr, 4);
pdu->generic_trap = trap_oid->subs[trap_oid->len - 1] - 1;
pdu->specific_trap = 0;
pdu->time_stamp = get_ticks() - start_tick;
pdu->nbindings = 0;
}
static void
snmp_create_v2_trap(struct snmp_pdu *pdu, char *com,
const struct asn_oid *trap_oid)
{
memset(pdu, 0, sizeof(*pdu));
strcpy(pdu->community, com);
pdu->version = SNMP_V2c;
pdu->type = SNMP_PDU_TRAP2;
pdu->request_id = reqid_next(trap_reqid);
pdu->error_index = 0;
pdu->error_status = SNMP_ERR_NOERROR;
pdu->bindings[0].var = oid_sysUpTime;
pdu->bindings[0].var.subs[pdu->bindings[0].var.len++] = 0;
pdu->bindings[0].syntax = SNMP_SYNTAX_TIMETICKS;
pdu->bindings[0].v.uint32 = get_ticks() - start_tick;
pdu->bindings[1].var = oid_snmpTrapOID;
pdu->bindings[1].var.subs[pdu->bindings[1].var.len++] = 0;
pdu->bindings[1].syntax = SNMP_SYNTAX_OID;
pdu->bindings[1].v.oid = *trap_oid;
pdu->nbindings = 2;
}
static void
snmp_create_v3_trap(struct snmp_pdu *pdu, struct target_param *target,
const struct asn_oid *trap_oid)
{
uint64_t etime;
struct usm_user *usmuser;
memset(pdu, 0, sizeof(*pdu));
pdu->version = SNMP_V3;
pdu->type = SNMP_PDU_TRAP2;
pdu->request_id = reqid_next(trap_reqid);
pdu->error_index = 0;
pdu->error_status = SNMP_ERR_NOERROR;
pdu->bindings[0].var = oid_sysUpTime;
pdu->bindings[0].var.subs[pdu->bindings[0].var.len++] = 0;
pdu->bindings[0].syntax = SNMP_SYNTAX_TIMETICKS;
pdu->bindings[0].v.uint32 = get_ticks() - start_tick;
pdu->bindings[1].var = oid_snmpTrapOID;
pdu->bindings[1].var.subs[pdu->bindings[1].var.len++] = 0;
pdu->bindings[1].syntax = SNMP_SYNTAX_OID;
pdu->bindings[1].v.oid = *trap_oid;
pdu->nbindings = 2;
etime = (get_ticks() - start_tick) / 100ULL;
if (etime < INT32_MAX)
snmpd_engine.engine_time = etime;
else {
start_tick = get_ticks();
set_snmpd_engine();
snmpd_engine.engine_time = start_tick;
}
memcpy(pdu->engine.engine_id, snmpd_engine.engine_id,
snmpd_engine.engine_len);
pdu->engine.engine_len = snmpd_engine.engine_len;
pdu->engine.engine_boots = snmpd_engine.engine_boots;
pdu->engine.engine_time = snmpd_engine.engine_time;
pdu->engine.max_msg_size = snmpd_engine.max_msg_size;
strlcpy(pdu->user.sec_name, target->secname,
sizeof(pdu->user.sec_name));
pdu->security_model = target->sec_model;
pdu->context_engine_len = snmpd_engine.engine_len;
memcpy(pdu->context_engine, snmpd_engine.engine_id,
snmpd_engine.engine_len);
if (target->sec_model == SNMP_SECMODEL_USM &&
target->sec_level != SNMP_noAuthNoPriv) {
usmuser = usm_find_user(pdu->engine.engine_id,
pdu->engine.engine_len, pdu->user.sec_name);
if (usmuser != NULL) {
pdu->user.auth_proto = usmuser->suser.auth_proto;
pdu->user.priv_proto = usmuser->suser.priv_proto;
memcpy(pdu->user.auth_key, usmuser->suser.auth_key,
sizeof(pdu->user.auth_key));
memcpy(pdu->user.priv_key, usmuser->suser.priv_key,
sizeof(pdu->user.priv_key));
}
snmp_pdu_init_secparams(pdu);
}
}
void
snmp_send_trap(const struct asn_oid *trap_oid, ...)
{
struct snmp_pdu pdu;
struct trapsink *t;
const struct snmp_value *v;
struct target_notify *n;
struct target_address *ta;
struct target_param *tp;
va_list ap;
u_char *sndbuf;
char *tag;
size_t sndlen;
ssize_t len;
int32_t ip;
TAILQ_FOREACH(t, &trapsink_list, link) {
if (t->status != TRAPSINK_ACTIVE)
continue;
if (t->version == TRAPSINK_V1)
snmp_create_v1_trap(&pdu, t->comm, trap_oid);
else
snmp_create_v2_trap(&pdu, t->comm, trap_oid);
va_start(ap, trap_oid);
while ((v = va_arg(ap, const struct snmp_value *)) != NULL)
pdu.bindings[pdu.nbindings++] = *v;
va_end(ap);
if (snmp_pdu_auth_access(&pdu, &ip) != SNMP_CODE_OK) {
syslog(LOG_DEBUG, "send trap to %s failed: no access",
t->comm);
continue;
}
if ((sndbuf = buf_alloc(1)) == NULL) {
syslog(LOG_ERR, "trap send buffer: %m");
return;
}
snmp_output(&pdu, sndbuf, &sndlen, "TRAP");
if ((len = send(t->socket, sndbuf, sndlen, 0)) == -1)
syslog(LOG_ERR, "send: %m");
else if ((size_t)len != sndlen)
syslog(LOG_ERR, "send: short write %zu/%zu",
sndlen, (size_t)len);
free(sndbuf);
}
SLIST_FOREACH(n, &target_notifylist, tn) {
if (n->status != RowStatus_active || n->taglist[0] == '\0')
continue;
SLIST_FOREACH(ta, &target_addresslist, ta)
if ((tag = strstr(ta->taglist, n->taglist)) != NULL &&
(tag[strlen(n->taglist)] == ' ' ||
tag[strlen(n->taglist)] == '\0' ||
tag[strlen(n->taglist)] == '\t' ||
tag[strlen(n->taglist)] == '\r' ||
tag[strlen(n->taglist)] == '\n') &&
ta->status == RowStatus_active)
break;
if (ta == NULL)
continue;
SLIST_FOREACH(tp, &target_paramlist, tp)
if (strcmp(tp->name, ta->paramname) == 0 &&
tp->status == 1)
break;
if (tp == NULL)
continue;
switch (tp->mpmodel) {
case SNMP_MPM_SNMP_V1:
snmp_create_v1_trap(&pdu, tp->secname, trap_oid);
break;
case SNMP_MPM_SNMP_V2c:
snmp_create_v2_trap(&pdu, tp->secname, trap_oid);
break;
case SNMP_MPM_SNMP_V3:
snmp_create_v3_trap(&pdu, tp, trap_oid);
break;
default:
continue;
}
va_start(ap, trap_oid);
while ((v = va_arg(ap, const struct snmp_value *)) != NULL)
pdu.bindings[pdu.nbindings++] = *v;
va_end(ap);
if (snmp_pdu_auth_access(&pdu, &ip) != SNMP_CODE_OK) {
syslog(LOG_DEBUG, "send trap to %s failed: no access",
t->comm);
continue;
}
if ((sndbuf = buf_alloc(1)) == NULL) {
syslog(LOG_ERR, "trap send buffer: %m");
return;
}
snmp_output(&pdu, sndbuf, &sndlen, "TRAP");
if ((len = send(ta->socket, sndbuf, sndlen, 0)) == -1)
syslog(LOG_ERR, "send: %m");
else if ((size_t)len != sndlen)
syslog(LOG_ERR, "send: short write %zu/%zu",
sndlen, (size_t)len);
free(sndbuf);
}
}
/*
* RFC 3413 SNMP Management Target MIB
*/
struct snmpd_target_stats *
bsnmpd_get_target_stats(void)
{
return (&snmpd_target_stats);
}
struct target_address *
target_first_address(void)
{
return (SLIST_FIRST(&target_addresslist));
}
struct target_address *
target_next_address(struct target_address *addrs)
{
if (addrs == NULL)
return (NULL);
return (SLIST_NEXT(addrs, ta));
}
struct target_address *
target_new_address(char *aname)
{
int cmp;
struct target_address *addrs, *temp, *prev;
SLIST_FOREACH(addrs, &target_addresslist, ta)
if (strcmp(aname, addrs->name) == 0)
return (NULL);
if ((addrs = (struct target_address *)malloc(sizeof(*addrs))) == NULL)
return (NULL);
memset(addrs, 0, sizeof(*addrs));
strlcpy(addrs->name, aname, sizeof(addrs->name));
addrs->timeout = 150;
addrs->retry = 3; /* XXX */
if ((prev = SLIST_FIRST(&target_addresslist)) == NULL ||
strcmp(aname, prev->name) < 0) {
SLIST_INSERT_HEAD(&target_addresslist, addrs, ta);
return (addrs);
}
SLIST_FOREACH(temp, &target_addresslist, ta) {
if ((cmp = strcmp(aname, temp->name)) <= 0)
break;
prev = temp;
}
if (temp == NULL || cmp < 0)
SLIST_INSERT_AFTER(prev, addrs, ta);
else if (cmp > 0)
SLIST_INSERT_AFTER(temp, addrs, ta);
else {
syslog(LOG_ERR, "Target address %s exists", addrs->name);
free(addrs);
return (NULL);
}
return (addrs);
}
int
target_activate_address(struct target_address *addrs)
{
struct sockaddr_in sa;
if ((addrs->socket = socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
syslog(LOG_ERR, "socket(UDP): %m");
return (SNMP_ERR_RES_UNAVAIL);
}
(void)shutdown(addrs->socket, SHUT_RD);
sa.sin_len = sizeof(sa);
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = htonl((addrs->address[0] << 24) |
(addrs->address[1] << 16) | (addrs->address[2] << 8) |
(addrs->address[3] << 0));
sa.sin_port = htons(addrs->address[4]) << 8 |
htons(addrs->address[5]) << 0;
if (connect(addrs->socket, (struct sockaddr *)&sa, sa.sin_len) == -1) {
syslog(LOG_ERR, "connect(%s,%u): %m",
inet_ntoa(sa.sin_addr), ntohs(sa.sin_port));
(void)close(addrs->socket);
return (SNMP_ERR_GENERR);
}
addrs->status = RowStatus_active;
return (SNMP_ERR_NOERROR);
}
int
target_delete_address(struct target_address *addrs)
{
SLIST_REMOVE(&target_addresslist, addrs, target_address, ta);
if (addrs->status == RowStatus_active)
close(addrs->socket);
free(addrs);
return (0);
}
struct target_param *
target_first_param(void)
{
return (SLIST_FIRST(&target_paramlist));
}
struct target_param *
target_next_param(struct target_param *param)
{
if (param == NULL)
return (NULL);
return (SLIST_NEXT(param, tp));
}
struct target_param *
target_new_param(char *pname)
{
int cmp;
struct target_param *param, *temp, *prev;
SLIST_FOREACH(param, &target_paramlist, tp)
if (strcmp(pname, param->name) == 0)
return (NULL);
if ((param = (struct target_param *)malloc(sizeof(*param))) == NULL)
return (NULL);
memset(param, 0, sizeof(*param));
strlcpy(param->name, pname, sizeof(param->name));
if ((prev = SLIST_FIRST(&target_paramlist)) == NULL ||
strcmp(pname, prev->name) < 0) {
SLIST_INSERT_HEAD(&target_paramlist, param, tp);
return (param);
}
SLIST_FOREACH(temp, &target_paramlist, tp) {
if ((cmp = strcmp(pname, temp->name)) <= 0)
break;
prev = temp;
}
if (temp == NULL || cmp < 0)
SLIST_INSERT_AFTER(prev, param, tp);
else if (cmp > 0)
SLIST_INSERT_AFTER(temp, param, tp);
else {
syslog(LOG_ERR, "Target parameter %s exists", param->name);
free(param);
return (NULL);
}
return (param);
}
int
target_delete_param(struct target_param *param)
{
SLIST_REMOVE(&target_paramlist, param, target_param, tp);
free(param);
return (0);
}
struct target_notify *
target_first_notify(void)
{
return (SLIST_FIRST(&target_notifylist));
}
struct target_notify *
target_next_notify(struct target_notify *notify)
{
if (notify == NULL)
return (NULL);
return (SLIST_NEXT(notify, tn));
}
struct target_notify *
target_new_notify(char *nname)
{
int cmp;
struct target_notify *notify, *temp, *prev;
SLIST_FOREACH(notify, &target_notifylist, tn)
if (strcmp(nname, notify->name) == 0)
return (NULL);
if ((notify = (struct target_notify *)malloc(sizeof(*notify))) == NULL)
return (NULL);
memset(notify, 0, sizeof(*notify));
strlcpy(notify->name, nname, sizeof(notify->name));
if ((prev = SLIST_FIRST(&target_notifylist)) == NULL ||
strcmp(nname, prev->name) < 0) {
SLIST_INSERT_HEAD(&target_notifylist, notify, tn);
return (notify);
}
SLIST_FOREACH(temp, &target_notifylist, tn) {
if ((cmp = strcmp(nname, temp->name)) <= 0)
break;
prev = temp;
}
if (temp == NULL || cmp < 0)
SLIST_INSERT_AFTER(prev, notify, tn);
else if (cmp > 0)
SLIST_INSERT_AFTER(temp, notify, tn);
else {
syslog(LOG_ERR, "Notification target %s exists", notify->name);
free(notify);
return (NULL);
}
return (notify);
}
int
target_delete_notify(struct target_notify *notify)
{
SLIST_REMOVE(&target_notifylist, notify, target_notify, tn);
free(notify);
return (0);
}
void
target_flush_all(void)
{
struct target_address *addrs;
struct target_param *param;
struct target_notify *notify;
while ((addrs = SLIST_FIRST(&target_addresslist)) != NULL) {
SLIST_REMOVE_HEAD(&target_addresslist, ta);
if (addrs->status == RowStatus_active)
close(addrs->socket);
free(addrs);
}
SLIST_INIT(&target_addresslist);
while ((param = SLIST_FIRST(&target_paramlist)) != NULL) {
SLIST_REMOVE_HEAD(&target_paramlist, tp);
free(param);
}
SLIST_INIT(&target_paramlist);
while ((notify = SLIST_FIRST(&target_notifylist)) != NULL) {
SLIST_REMOVE_HEAD(&target_notifylist, tn);
free(notify);
}
SLIST_INIT(&target_notifylist);
}
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