mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-11-27 08:00:11 +00:00
Code Issues Releases Activity
main
freebsd/contrib/bsnmp/snmpd/action.c
Andrey V. Elsukov 7e03e18104 Rename "index" variable to "idx" since gcc complains that it shadows 
index(3) function declaration.

Reported by:	lwhsu
MFC after:	2 weeks
2018-01-19 20:33:47 +00:00

1271 lines
30 KiB
C
Raw Permalink Blame History

/*
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* All rights reserved.
* Copyright (c) 2004-2006
* Hartmut Brandt.
* All rights reserved.
*
* Author: Harti Brandt <harti@freebsd.org>
*
* 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: action.c 517 2006-10-31 08:52:04Z brandt_h $
*
* Variable access for SNMPd
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <sys/utsname.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "snmpmod.h"
#include "snmpd.h"
#include "tree.h"
#include "oid.h"
static const struct asn_oid
oid_begemotSnmpdModuleTable = OIDX_begemotSnmpdModuleTable;
#ifdef __FreeBSD__
static const struct asn_oid
oid_freeBSDVersion = OIDX_freeBSDVersion;
#endif
/*
* Get an integer value from the KERN sysctl subtree.
*/
static char *
act_getkernint(int id)
{
int mib[2];
size_t len;
u_long value;
char *string;
mib[0] = CTL_KERN;
mib[1] = id;
len = sizeof(value);
if (sysctl(mib, 2, &value, &len, NULL, 0) != 0)
return (NULL);
if ((string = malloc(20)) == NULL)
return (NULL);
sprintf(string, "%lu", value);
return (string);
}
/*
* Initialize global variables of the system group.
*/
int
init_actvals(void)
{
struct utsname uts;
char *hostid;
size_t len;
#ifdef __FreeBSD__
char *rel, *p, *end;
u_long num;
#endif
if (uname(&uts) == -1)
return (-1);
if ((systemg.name = strdup(uts.nodename)) == NULL)
return (-1);
if ((hostid = act_getkernint(KERN_HOSTID)) == NULL)
return (-1);
len = strlen(uts.nodename) + 1;
len += strlen(hostid) + 1;
len += strlen(uts.sysname) + 1;
len += strlen(uts.release) + 1;
if ((systemg.descr = malloc(len)) == NULL) {
free(hostid);
return (-1);
}
sprintf(systemg.descr, "%s %s %s %s", uts.nodename, hostid, uts.sysname,
uts.release);
#ifdef __FreeBSD__
/*
* Construct a FreeBSD oid
*/
systemg.object_id = oid_freeBSDVersion;
rel = uts.release;
while ((p = strsep(&rel, ".")) != NULL &&
systemg.object_id.len < ASN_MAXOIDLEN) {
systemg.object_id.subs[systemg.object_id.len] = 0;
if (*p != '\0') {
num = strtoul(p, &end, 10);
if (end == p)
break;
systemg.object_id.subs[systemg.object_id.len] = num;
}
systemg.object_id.len++;
}
#endif
free(hostid);
return (0);
}
/*
* Initialize global variables of the snmpEngine group.
*/
int
init_snmpd_engine(void)
{
char *hostid;
snmpd_engine.engine_boots = 1;
snmpd_engine.engine_time = 1;
snmpd_engine.max_msg_size = 1500; /* XXX */
snmpd_engine.engine_id[0] = ((OID_freeBSD & 0xff000000) >> 24) | 0x80;
snmpd_engine.engine_id[1] = (OID_freeBSD & 0xff0000) >> 16;
snmpd_engine.engine_id[2] = (OID_freeBSD & 0xff00) >> 8;
snmpd_engine.engine_id[3] = OID_freeBSD & 0xff;
snmpd_engine.engine_id[4] = 128;
snmpd_engine.engine_len = 5;
if ((hostid = act_getkernint(KERN_HOSTID)) == NULL)
return (-1);
if (strlen(hostid) > SNMP_ENGINE_ID_SIZ - snmpd_engine.engine_len) {
memcpy(snmpd_engine.engine_id + snmpd_engine.engine_len,
hostid, SNMP_ENGINE_ID_SIZ - snmpd_engine.engine_len);
snmpd_engine.engine_len = SNMP_ENGINE_ID_SIZ;
} else {
memcpy(snmpd_engine.engine_id + snmpd_engine.engine_len,
hostid, strlen(hostid));
snmpd_engine.engine_len += strlen(hostid);
}
free(hostid);
return (0);
}
int
set_snmpd_engine(void)
{
FILE *fp;
uint32_t i;
uint8_t *cptr, engine[2 * SNMP_ENGINE_ID_SIZ + 2];
uint8_t myengine[2 * SNMP_ENGINE_ID_SIZ + 2];
if (engine_file[0] == '\0')
return (-1);
cptr = myengine;
for (i = 0; i < snmpd_engine.engine_len; i++)
cptr += sprintf(cptr, "%.2x", snmpd_engine.engine_id[i]);
*cptr++ = '\n';
*cptr++ = '\0';
if ((fp = fopen(engine_file, "r+")) != NULL) {
if (fgets(engine, sizeof(engine) - 1, fp) == NULL ||
fscanf(fp, "%u", &snmpd_engine.engine_boots) <= 0) {
fclose(fp);
goto save_boots;
}
fclose(fp);
if (strcmp(myengine, engine) != 0)
snmpd_engine.engine_boots = 1;
else
snmpd_engine.engine_boots++;
} else if (errno != ENOENT)
return (-1);
save_boots:
if ((fp = fopen(engine_file, "w+")) == NULL)
return (-1);
fprintf(fp, "%s%u\n", myengine, snmpd_engine.engine_boots);
fclose(fp);
return (0);
}
void
update_snmpd_engine_time(void)
{
uint64_t etime;
etime = (get_ticks() - start_tick) / 100ULL;
if (etime < INT32_MAX)
snmpd_engine.engine_time = etime;
else {
start_tick = get_ticks();
(void)set_snmpd_engine();
snmpd_engine.engine_time = start_tick;
}
}
/*************************************************************
*
* System group
*/
int
op_system_group(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
switch (which) {
case LEAF_sysDescr:
if (community != COMM_INITIALIZE)
return (SNMP_ERR_NOT_WRITEABLE);
return (string_save(value, ctx, -1, &systemg.descr));
case LEAF_sysObjectId:
if (community != COMM_INITIALIZE)
return (SNMP_ERR_NOT_WRITEABLE);
return (oid_save(value, ctx, &systemg.object_id));
case LEAF_sysContact:
return (string_save(value, ctx, -1, &systemg.contact));
case LEAF_sysName:
return (string_save(value, ctx, -1, &systemg.name));
case LEAF_sysLocation:
return (string_save(value, ctx, -1, &systemg.location));
}
return (SNMP_ERR_NO_CREATION);
case SNMP_OP_ROLLBACK:
switch (which) {
case LEAF_sysDescr:
string_rollback(ctx, &systemg.descr);
return (SNMP_ERR_NOERROR);
case LEAF_sysObjectId:
oid_rollback(ctx, &systemg.object_id);
return (SNMP_ERR_NOERROR);
case LEAF_sysContact:
string_rollback(ctx, &systemg.contact);
return (SNMP_ERR_NOERROR);
case LEAF_sysName:
string_rollback(ctx, &systemg.name);
return (SNMP_ERR_NOERROR);
case LEAF_sysLocation:
string_rollback(ctx, &systemg.location);
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_COMMIT:
switch (which) {
case LEAF_sysDescr:
string_commit(ctx);
return (SNMP_ERR_NOERROR);
case LEAF_sysObjectId:
oid_commit(ctx);
return (SNMP_ERR_NOERROR);
case LEAF_sysContact:
string_commit(ctx);
return (SNMP_ERR_NOERROR);
case LEAF_sysName:
string_commit(ctx);
return (SNMP_ERR_NOERROR);
case LEAF_sysLocation:
string_commit(ctx);
return (SNMP_ERR_NOERROR);
}
abort();
}
/*
* Come here for GET.
*/
switch (which) {
case LEAF_sysDescr:
return (string_get(value, systemg.descr, -1));
case LEAF_sysObjectId:
return (oid_get(value, &systemg.object_id));
case LEAF_sysUpTime:
value->v.uint32 = get_ticks() - start_tick;
break;
case LEAF_sysContact:
return (string_get(value, systemg.contact, -1));
case LEAF_sysName:
return (string_get(value, systemg.name, -1));
case LEAF_sysLocation:
return (string_get(value, systemg.location, -1));
case LEAF_sysServices:
value->v.integer = systemg.services;
break;
case LEAF_sysORLastChange:
value->v.uint32 = systemg.or_last_change;
break;
}
return (SNMP_ERR_NOERROR);
}
/*************************************************************
*
* Debug group
*/
int
op_debug(struct snmp_context *ctx, struct snmp_value *value, u_int sub,
u_int iidx __unused, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
switch (which) {
case LEAF_begemotSnmpdDebugDumpPdus:
value->v.integer = TRUTH_MK(debug.dump_pdus);
break;
case LEAF_begemotSnmpdDebugSnmpTrace:
value->v.uint32 = snmp_trace;
break;
case LEAF_begemotSnmpdDebugSyslogPri:
value->v.integer = debug.logpri;
break;
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_SET:
switch (which) {
case LEAF_begemotSnmpdDebugDumpPdus:
if (!TRUTH_OK(value->v.integer))
return (SNMP_ERR_WRONG_VALUE);
ctx->scratch->int1 = debug.dump_pdus;
debug.dump_pdus = TRUTH_GET(value->v.integer);
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdDebugSnmpTrace:
ctx->scratch->int1 = snmp_trace;
snmp_trace = value->v.uint32;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdDebugSyslogPri:
if (value->v.integer < 0 || value->v.integer > 8)
return (SNMP_ERR_WRONG_VALUE);
ctx->scratch->int1 = debug.logpri;
debug.logpri = (u_int)value->v.integer;
return (SNMP_ERR_NOERROR);
}
return (SNMP_ERR_NO_CREATION);
case SNMP_OP_ROLLBACK:
switch (which) {
case LEAF_begemotSnmpdDebugDumpPdus:
debug.dump_pdus = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdDebugSnmpTrace:
snmp_trace = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdDebugSyslogPri:
debug.logpri = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_COMMIT:
switch (which) {
case LEAF_begemotSnmpdDebugDumpPdus:
case LEAF_begemotSnmpdDebugSnmpTrace:
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdDebugSyslogPri:
if (debug.logpri == 0)
setlogmask(0);
else
setlogmask(LOG_UPTO(debug.logpri - 1));
return (SNMP_ERR_NOERROR);
}
abort();
}
abort();
}
/*************************************************************
*
* OR Table
*/
int
op_or_table(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
struct objres *objres;
switch (op) {
case SNMP_OP_GETNEXT:
if ((objres = NEXT_OBJECT_INT(&objres_list, &value->var, sub))
== NULL)
return (SNMP_ERR_NOSUCHNAME);
value->var.subs[sub] = objres->index;
value->var.len = sub + 1;
break;
case SNMP_OP_GET:
if ((objres = FIND_OBJECT_INT(&objres_list, &value->var, sub))
== NULL)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
if ((objres = FIND_OBJECT_INT(&objres_list, &value->var, sub))
== NULL)
return (SNMP_ERR_NO_CREATION);
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
default:
abort();
}
/*
* Come here for GET, GETNEXT.
*/
switch (value->var.subs[sub - 1]) {
case LEAF_sysORID:
value->v.oid = objres->oid;
break;
case LEAF_sysORDescr:
return (string_get(value, objres->descr, -1));
case LEAF_sysORUpTime:
value->v.uint32 = objres->uptime;
break;
}
return (SNMP_ERR_NOERROR);
}
/*************************************************************
*
* mib-2 snmp
*/
int
op_snmp(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpInPkts:
value->v.uint32 = snmpd_stats.inPkts;
break;
case LEAF_snmpInBadVersions:
value->v.uint32 = snmpd_stats.inBadVersions;
break;
case LEAF_snmpInBadCommunityNames:
value->v.uint32 = snmpd_stats.inBadCommunityNames;
break;
case LEAF_snmpInBadCommunityUses:
value->v.uint32 = snmpd_stats.inBadCommunityUses;
break;
case LEAF_snmpInASNParseErrs:
value->v.uint32 = snmpd_stats.inASNParseErrs;
break;
case LEAF_snmpEnableAuthenTraps:
value->v.integer = TRUTH_MK(snmpd.auth_traps);
break;
case LEAF_snmpSilentDrops:
value->v.uint32 = snmpd_stats.silentDrops;
break;
case LEAF_snmpProxyDrops:
value->v.uint32 = snmpd_stats.proxyDrops;
break;
default:
return (SNMP_ERR_NOSUCHNAME);
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_SET:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpEnableAuthenTraps:
if (!TRUTH_OK(value->v.integer))
return (SNMP_ERR_WRONG_VALUE);
ctx->scratch->int1 = value->v.integer;
snmpd.auth_traps = TRUTH_GET(value->v.integer);
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_ROLLBACK:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpEnableAuthenTraps:
snmpd.auth_traps = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_COMMIT:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpEnableAuthenTraps:
return (SNMP_ERR_NOERROR);
}
abort();
}
abort();
}
/*************************************************************
*
* SNMPd statistics group
*/
int
op_snmpd_stats(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
switch (op) {
case SNMP_OP_GET:
switch (value->var.subs[sub - 1]) {
case LEAF_begemotSnmpdStatsNoRxBufs:
value->v.uint32 = snmpd_stats.noRxbuf;
break;
case LEAF_begemotSnmpdStatsNoTxBufs:
value->v.uint32 = snmpd_stats.noTxbuf;
break;
case LEAF_begemotSnmpdStatsInTooLongPkts:
value->v.uint32 = snmpd_stats.inTooLong;
break;
case LEAF_begemotSnmpdStatsInBadPduTypes:
value->v.uint32 = snmpd_stats.inBadPduTypes;
break;
default:
return (SNMP_ERR_NOSUCHNAME);
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_SET:
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
case SNMP_OP_GETNEXT:
abort();
}
abort();
}
/*
* SNMPd configuration scalars
*/
int
op_snmpd_config(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
switch (which) {
case LEAF_begemotSnmpdTransmitBuffer:
value->v.integer = snmpd.txbuf;
break;
case LEAF_begemotSnmpdReceiveBuffer:
value->v.integer = snmpd.rxbuf;
break;
case LEAF_begemotSnmpdCommunityDisable:
value->v.integer = TRUTH_MK(snmpd.comm_dis);
break;
case LEAF_begemotSnmpdTrap1Addr:
return (ip_get(value, snmpd.trap1addr));
case LEAF_begemotSnmpdVersionEnable:
value->v.uint32 = snmpd.version_enable;
break;
default:
return (SNMP_ERR_NOSUCHNAME);
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_SET:
switch (which) {
case LEAF_begemotSnmpdTransmitBuffer:
ctx->scratch->int1 = snmpd.txbuf;
if (value->v.integer < 484 ||
value->v.integer > 65535)
return (SNMP_ERR_WRONG_VALUE);
snmpd.txbuf = value->v.integer;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdReceiveBuffer:
ctx->scratch->int1 = snmpd.rxbuf;
if (value->v.integer < 484 ||
value->v.integer > 65535)
return (SNMP_ERR_WRONG_VALUE);
snmpd.rxbuf = value->v.integer;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdCommunityDisable:
ctx->scratch->int1 = snmpd.comm_dis;
if (!TRUTH_OK(value->v.integer))
return (SNMP_ERR_WRONG_VALUE);
if (TRUTH_GET(value->v.integer)) {
snmpd.comm_dis = 1;
} else {
if (snmpd.comm_dis)
return (SNMP_ERR_WRONG_VALUE);
}
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdTrap1Addr:
return (ip_save(value, ctx, snmpd.trap1addr));
case LEAF_begemotSnmpdVersionEnable:
if (community != COMM_INITIALIZE)
return (SNMP_ERR_NOT_WRITEABLE);
ctx->scratch->int1 = snmpd.version_enable;
if (value->v.uint32 == 0 ||
(value->v.uint32 & ~VERS_ENABLE_ALL))
return (SNMP_ERR_WRONG_VALUE);
snmpd.version_enable = value->v.uint32;
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_ROLLBACK:
switch (which) {
case LEAF_begemotSnmpdTransmitBuffer:
snmpd.rxbuf = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdReceiveBuffer:
snmpd.txbuf = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdCommunityDisable:
snmpd.comm_dis = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdTrap1Addr:
ip_rollback(ctx, snmpd.trap1addr);
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdVersionEnable:
snmpd.version_enable = ctx->scratch->int1;
return (SNMP_ERR_NOERROR);
}
abort();
case SNMP_OP_COMMIT:
switch (which) {
case LEAF_begemotSnmpdTransmitBuffer:
case LEAF_begemotSnmpdReceiveBuffer:
case LEAF_begemotSnmpdCommunityDisable:
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdTrap1Addr:
ip_commit(ctx);
return (SNMP_ERR_NOERROR);
case LEAF_begemotSnmpdVersionEnable:
return (SNMP_ERR_NOERROR);
}
abort();
}
abort();
}
/*
* The community table
*/
int
op_community(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
struct asn_oid idx;
struct community *c;
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GETNEXT:
if ((community != COMM_INITIALIZE && snmpd.comm_dis) ||
(c = NEXT_OBJECT_OID(&community_list, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
index_append(&value->var, sub, &c->index);
break;
case SNMP_OP_GET:
if ((community != COMM_INITIALIZE && snmpd.comm_dis) ||
(c = FIND_OBJECT_OID(&community_list, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
if (community != COMM_INITIALIZE && snmpd.comm_dis)
return (SNMP_ERR_NOT_WRITEABLE);
idx.len = 2;
idx.subs[0] = 0;
idx.subs[1] = value->var.subs[value->var.len - 1];
switch (which) {
case LEAF_begemotSnmpdCommunityString:
/* check that given string is unique */
TAILQ_FOREACH(c, &community_list, link) {
if (!asn_compare_oid(&idx, &c->index))
continue;
if (c->string != NULL && strcmp(c->string,
value->v.octetstring.octets) == 0)
return (SNMP_ERR_WRONG_VALUE);
}
case LEAF_begemotSnmpdCommunityPermission:
break;
default:
return (SNMP_ERR_NOT_WRITEABLE);
}
if ((c = FIND_OBJECT_OID(&community_list, &value->var,
sub)) == NULL) {
/* create new community and use user sepcified index */
c = comm_define_ordered(COMM_READ, "SNMP Custom Community",
&idx, NULL, NULL);
if (c == NULL)
return (SNMP_ERR_NO_CREATION);
}
switch (which) {
case LEAF_begemotSnmpdCommunityString:
return (string_save(value, ctx, -1, &c->string));
case LEAF_begemotSnmpdCommunityPermission:
if (value->v.integer != COMM_READ &&
value->v.integer != COMM_WRITE)
return (SNMP_ERR_WRONG_VALUE);
c->private = value->v.integer;
break;
default:
return (SNMP_ERR_NOT_WRITEABLE);
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_ROLLBACK:
if (which == LEAF_begemotSnmpdCommunityString) {
if ((c = FIND_OBJECT_OID(&community_list, &value->var,
sub)) == NULL)
string_free(ctx);
else
string_rollback(ctx, &c->string);
return (SNMP_ERR_NOERROR);
}
if (which == LEAF_begemotSnmpdCommunityPermission)
return (SNMP_ERR_NOERROR);
abort();
case SNMP_OP_COMMIT:
if (which == LEAF_begemotSnmpdCommunityString) {
if ((c = FIND_OBJECT_OID(&community_list, &value->var,
sub)) == NULL)
string_free(ctx);
else
string_commit(ctx);
return (SNMP_ERR_NOERROR);
}
if (which == LEAF_begemotSnmpdCommunityPermission)
return (SNMP_ERR_NOERROR);
abort();
default:
abort();
}
switch (which) {
case LEAF_begemotSnmpdCommunityString:
return (string_get(value, c->string, -1));
case LEAF_begemotSnmpdCommunityDescr:
return (string_get(value, c->descr, -1));
case LEAF_begemotSnmpdCommunityPermission:
value->v.integer = c->private;
return (SNMP_ERR_NOERROR);
default:
return (SNMP_ERR_NOT_WRITEABLE);
}
abort();
}
/*
* Module table.
*/
struct module_dep {
struct snmp_dependency dep;
u_char section[LM_SECTION_MAX + 1];
u_char *path;
struct lmodule *m;
};
static int
dep_modules(struct snmp_context *ctx, struct snmp_dependency *dep,
enum snmp_depop op)
{
struct module_dep *mdep = (struct module_dep *)(void *)dep;
switch (op) {
case SNMP_DEPOP_COMMIT:
if (mdep->path == NULL) {
/* unload - find the module */
TAILQ_FOREACH(mdep->m, &lmodules, link)
if (strcmp(mdep->m->section,
mdep->section) == 0)
break;
if (mdep->m == NULL)
/* no such module - that's ok */
return (SNMP_ERR_NOERROR);
/* handle unloading in the finalizer */
return (SNMP_ERR_NOERROR);
}
/* load */
if ((mdep->m = lm_load(mdep->path, mdep->section)) == NULL) {
/* could not load */
return (SNMP_ERR_RES_UNAVAIL);
}
/* start in finalizer */
return (SNMP_ERR_NOERROR);
case SNMP_DEPOP_ROLLBACK:
if (mdep->path == NULL) {
/* rollback unload - the finalizer takes care */
return (SNMP_ERR_NOERROR);
}
/* rollback load */
lm_unload(mdep->m);
return (SNMP_ERR_NOERROR);
case SNMP_DEPOP_FINISH:
if (mdep->path == NULL) {
if (mdep->m != NULL && ctx->code == SNMP_RET_OK)
lm_unload(mdep->m);
} else {
if (mdep->m != NULL && ctx->code == SNMP_RET_OK &&
community != COMM_INITIALIZE)
lm_start(mdep->m);
free(mdep->path);
}
return (SNMP_ERR_NOERROR);
}
abort();
}
int
op_modules(struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
struct lmodule *m;
u_char *section, *ptr;
size_t seclen;
struct module_dep *mdep;
struct asn_oid idx;
switch (op) {
case SNMP_OP_GETNEXT:
if ((m = NEXT_OBJECT_OID(&lmodules, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
index_append(&value->var, sub, &m->index);
break;
case SNMP_OP_GET:
if ((m = FIND_OBJECT_OID(&lmodules, &value->var, sub)) == NULL)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
m = FIND_OBJECT_OID(&lmodules, &value->var, sub);
if (which != LEAF_begemotSnmpdModulePath) {
if (m == NULL)
return (SNMP_ERR_NO_CREATION);
return (SNMP_ERR_NOT_WRITEABLE);
}
/* the errors in the next few statements can only happen when
* m is NULL, hence the NO_CREATION error. */
if (index_decode(&value->var, sub, iidx,
&section, &seclen))
return (SNMP_ERR_NO_CREATION);
/* check the section name */
if (seclen > LM_SECTION_MAX || seclen == 0) {
free(section);
return (SNMP_ERR_NO_CREATION);
}
for (ptr = section; ptr < section + seclen; ptr++)
if (!isascii(*ptr) || !isalnum(*ptr)) {
free(section);
return (SNMP_ERR_NO_CREATION);
}
if (!isalpha(section[0])) {
free(section);
return (SNMP_ERR_NO_CREATION);
}
/* check the path */
for (ptr = value->v.octetstring.octets;
ptr < value->v.octetstring.octets + value->v.octetstring.len;
ptr++) {
if (*ptr == '\0') {
free(section);
return (SNMP_ERR_WRONG_VALUE);
}
}
if (m == NULL) {
if (value->v.octetstring.len == 0) {
free(section);
return (SNMP_ERR_INCONS_VALUE);
}
} else {
if (value->v.octetstring.len != 0) {
free(section);
return (SNMP_ERR_INCONS_VALUE);
}
}
asn_slice_oid(&idx, &value->var, sub, value->var.len);
/* so far, so good */
mdep = (struct module_dep *)(void *)snmp_dep_lookup(ctx,
&oid_begemotSnmpdModuleTable, &idx,
sizeof(*mdep), dep_modules);
if (mdep == NULL) {
free(section);
return (SNMP_ERR_RES_UNAVAIL);
}
if (mdep->section[0] != '\0') {
/* two writes to the same entry - bad */
free(section);
return (SNMP_ERR_INCONS_VALUE);
}
strncpy(mdep->section, section, seclen);
mdep->section[seclen] = '\0';
free(section);
if (value->v.octetstring.len == 0)
mdep->path = NULL;
else {
if ((mdep->path = malloc(value->v.octetstring.len + 1)) == NULL)
return (SNMP_ERR_RES_UNAVAIL);
strncpy(mdep->path, value->v.octetstring.octets,
value->v.octetstring.len);
mdep->path[value->v.octetstring.len] = '\0';
}
ctx->scratch->ptr1 = mdep;
return (SNMP_ERR_NOERROR);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
return (SNMP_ERR_NOERROR);
default:
abort();
}
switch (which) {
case LEAF_begemotSnmpdModulePath:
return (string_get(value, m->path, -1));
case LEAF_begemotSnmpdModuleComment:
return (string_get(value, m->config->comment, -1));
}
abort();
}
int
op_snmp_set(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpSetSerialNo:
value->v.integer = snmp_serial_no;
break;
default:
abort();
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_SET:
switch (value->var.subs[sub - 1]) {
case LEAF_snmpSetSerialNo:
if (value->v.integer != snmp_serial_no)
return (SNMP_ERR_INCONS_VALUE);
break;
default:
abort();
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_ROLLBACK:
return (SNMP_ERR_NOERROR);
case SNMP_OP_COMMIT:
if (snmp_serial_no++ == 2147483647)
snmp_serial_no = 0;
return (SNMP_ERR_NOERROR);
}
abort();
}
/*
* SNMP Engine
*/
int
op_snmp_engine(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx __unused, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GETNEXT:
abort();
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
if (community != COMM_INITIALIZE)
return (SNMP_ERR_NOT_WRITEABLE);
switch (which) {
case LEAF_snmpEngineID:
if (value->v.octetstring.len > SNMP_ENGINE_ID_SIZ)
return (SNMP_ERR_WRONG_VALUE);
ctx->scratch->ptr1 = malloc(snmpd_engine.engine_len);
if (ctx->scratch->ptr1 == NULL)
return (SNMP_ERR_GENERR);
memcpy(ctx->scratch->ptr1, snmpd_engine.engine_id,
snmpd_engine.engine_len);
ctx->scratch->int1 = snmpd_engine.engine_len;
snmpd_engine.engine_len = value->v.octetstring.len;
memcpy(snmpd_engine.engine_id,
value->v.octetstring.octets,
value->v.octetstring.len);
break;
case LEAF_snmpEngineMaxMessageSize:
ctx->scratch->int1 = snmpd_engine.max_msg_size;
snmpd_engine.max_msg_size = value->v.integer;
break;
default:
return (SNMP_ERR_NOT_WRITEABLE);
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_ROLLBACK:
switch (which) {
case LEAF_snmpEngineID:
snmpd_engine.engine_len = ctx->scratch->int1;
memcpy(snmpd_engine.engine_id, ctx->scratch->ptr1,
snmpd_engine.engine_len);
free(ctx->scratch->ptr1);
break;
case LEAF_snmpEngineMaxMessageSize:
snmpd_engine.max_msg_size = ctx->scratch->int1;
break;
default:
abort();
}
return (SNMP_ERR_NOERROR);
case SNMP_OP_COMMIT:
if (which == LEAF_snmpEngineID) {
if (set_snmpd_engine() < 0) {
snmpd_engine.engine_len = ctx->scratch->int1;
memcpy(snmpd_engine.engine_id,
ctx->scratch->ptr1, ctx->scratch->int1);
}
free(ctx->scratch->ptr1);
}
return (SNMP_ERR_NOERROR);
}
switch (which) {
case LEAF_snmpEngineID:
return (string_get(value, snmpd_engine.engine_id,
snmpd_engine.engine_len));
case LEAF_snmpEngineBoots:
value->v.integer = snmpd_engine.engine_boots;
break;
case LEAF_snmpEngineTime:
update_snmpd_engine_time();
value->v.integer = snmpd_engine.engine_time;
break;
case LEAF_snmpEngineMaxMessageSize:
value->v.integer = snmpd_engine.max_msg_size;
break;
default:
return (SNMP_ERR_NOSUCHNAME);
}
return (SNMP_ERR_NOERROR);
}
/*
* Transport table
*/
int
op_transport_table(struct snmp_context *ctx __unused, struct snmp_value *value,
u_int sub, u_int iidx, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
struct transport *t;
u_char *tname, *ptr;
size_t tnamelen;
switch (op) {
case SNMP_OP_GETNEXT:
if ((t = NEXT_OBJECT_OID(&transport_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(&transport_list, &value->var, sub))
== NULL)
return (SNMP_ERR_NOSUCHNAME);
break;
case SNMP_OP_SET:
t = FIND_OBJECT_OID(&transport_list, &value->var, sub);
if (which != LEAF_begemotSnmpdTransportStatus) {
if (t == NULL)
return (SNMP_ERR_NO_CREATION);
return (SNMP_ERR_NOT_WRITEABLE);
}
/* the errors in the next few statements can only happen when
* t is NULL, hence the NO_CREATION error. */
if (index_decode(&value->var, sub, iidx,
&tname, &tnamelen))
return (SNMP_ERR_NO_CREATION);
/* check the section name */
if (tnamelen >= TRANS_NAMELEN || tnamelen == 0) {
free(tname);
return (SNMP_ERR_NO_CREATION);
}
for (ptr = tname; ptr < tname + tnamelen; ptr++) {
if (!isascii(*ptr) || !isalnum(*ptr)) {
free(tname);
return (SNMP_ERR_NO_CREATION);
}
}
/* for now */
return (SNMP_ERR_NOT_WRITEABLE);
case SNMP_OP_ROLLBACK:
case SNMP_OP_COMMIT:
return (SNMP_ERR_NOERROR);
default:
abort();
}
switch (which) {
case LEAF_begemotSnmpdTransportStatus:
value->v.integer = 1;
break;
case LEAF_begemotSnmpdTransportOid:
memcpy(&value->v.oid, &t->vtab->id, sizeof(t->vtab->id));
break;
}
return (SNMP_ERR_NOERROR);
}
Reference in New Issue View Git Blame Copy Permalink