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freebsd-dev/usr.sbin/bsnmpd/tools/libbsnmptools/bsnmptools.c
Eugene Grosbein dca51295b2 bsnmptools: make it print protocol errors to stderr instead of stdout 
Reviewed by:		syrinx, bz
MFC after:		1 week
Differential Revision:	https://reviews.freebsd.org/D25911
2020-08-05 09:19:41 +00:00

2139 lines
48 KiB
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/*-
* Copyright (c) 2005-2006 The FreeBSD Project
* All rights reserved.
*
* Author: Shteryana Shopova <syrinx@FreeBSD.org>
*
* Redistribution of this software and documentation 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 or documentation 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 THE 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 THE 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.
*
* Helper functions for snmp client tools
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/uio.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <bsnmp/asn1.h>
#include <bsnmp/snmp.h>
#include <bsnmp/snmpclient.h>
#include "bsnmptc.h"
#include "bsnmptools.h"
/* Internal varibale to turn on library debugging for testing and to
* find bugs. It is not exported via the header file.
* XXX should we cover it by some #ifdef BSNMPTOOLS_DEBUG? */
int _bsnmptools_debug = 0;
/* Default files to import mapping from if none explicitly provided. */
#define bsnmpd_defs "/usr/share/snmp/defs/tree.def"
#define mibII_defs "/usr/share/snmp/defs/mibII_tree.def"
/*
* The .iso.org.dod oid that has to be prepended to every OID when requesting
* a value.
*/
const struct asn_oid IsoOrgDod_OID = {
3, { 1, 3, 6 }
};
#define SNMP_ERR_UNKNOWN 0
/*
* An array of error strings corresponding to error definitions from libbsnmp.
*/
static const struct {
const char *str;
int32_t error;
} error_strings[] = {
{ "Unknown", SNMP_ERR_UNKNOWN },
{ "Too big ", SNMP_ERR_TOOBIG },
{ "No such Name", SNMP_ERR_NOSUCHNAME },
{ "Bad Value", SNMP_ERR_BADVALUE },
{ "Readonly", SNMP_ERR_READONLY },
{ "General error", SNMP_ERR_GENERR },
{ "No access", SNMP_ERR_NO_ACCESS },
{ "Wrong type", SNMP_ERR_WRONG_TYPE },
{ "Wrong length", SNMP_ERR_WRONG_LENGTH },
{ "Wrong encoding", SNMP_ERR_WRONG_ENCODING },
{ "Wrong value", SNMP_ERR_WRONG_VALUE },
{ "No creation", SNMP_ERR_NO_CREATION },
{ "Inconsistent value", SNMP_ERR_INCONS_VALUE },
{ "Resource unavailable", SNMP_ERR_RES_UNAVAIL },
{ "Commit failed", SNMP_ERR_COMMIT_FAILED },
{ "Undo failed", SNMP_ERR_UNDO_FAILED },
{ "Authorization error", SNMP_ERR_AUTH_ERR },
{ "Not writable", SNMP_ERR_NOT_WRITEABLE },
{ "Inconsistent name", SNMP_ERR_INCONS_NAME },
{ NULL, 0 }
};
/* This one and any following are exceptions. */
#define SNMP_SYNTAX_UNKNOWN SNMP_SYNTAX_NOSUCHOBJECT
static const struct {
const char *str;
enum snmp_syntax stx;
} syntax_strings[] = {
{ "Null", SNMP_SYNTAX_NULL },
{ "Integer", SNMP_SYNTAX_INTEGER },
{ "OctetString", SNMP_SYNTAX_OCTETSTRING },
{ "OID", SNMP_SYNTAX_OID },
{ "IpAddress", SNMP_SYNTAX_IPADDRESS },
{ "Counter32", SNMP_SYNTAX_COUNTER },
{ "Gauge", SNMP_SYNTAX_GAUGE },
{ "TimeTicks", SNMP_SYNTAX_TIMETICKS },
{ "Counter64", SNMP_SYNTAX_COUNTER64 },
{ "Unknown", SNMP_SYNTAX_UNKNOWN },
};
int
snmptool_init(struct snmp_toolinfo *snmptoolctx)
{
char *str;
size_t slen;
memset(snmptoolctx, 0, sizeof(struct snmp_toolinfo));
snmptoolctx->objects = 0;
snmptoolctx->mappings = NULL;
snmptoolctx->flags = SNMP_PDU_GET; /* XXX */
SLIST_INIT(&snmptoolctx->filelist);
snmp_client_init(&snmp_client);
SET_MAXREP(snmptoolctx, SNMP_MAX_REPETITIONS);
if (add_filename(snmptoolctx, bsnmpd_defs, &IsoOrgDod_OID, 0) < 0)
warnx("Error adding file %s to list", bsnmpd_defs);
if (add_filename(snmptoolctx, mibII_defs, &IsoOrgDod_OID, 0) < 0)
warnx("Error adding file %s to list", mibII_defs);
/* Read the environment */
if ((str = getenv("SNMPAUTH")) != NULL) {
slen = strlen(str);
if (slen == strlen("md5") && strcasecmp(str, "md5") == 0)
snmp_client.user.auth_proto = SNMP_AUTH_HMAC_MD5;
else if (slen == strlen("sha")&& strcasecmp(str, "sha") == 0)
snmp_client.user.auth_proto = SNMP_AUTH_HMAC_SHA;
else if (slen != 0)
warnx("Bad authentication type - %s in SNMPAUTH", str);
}
if ((str = getenv("SNMPPRIV")) != NULL) {
slen = strlen(str);
if (slen == strlen("des") && strcasecmp(str, "des") == 0)
snmp_client.user.priv_proto = SNMP_PRIV_DES;
else if (slen == strlen("aes")&& strcasecmp(str, "aes") == 0)
snmp_client.user.priv_proto = SNMP_PRIV_AES;
else if (slen != 0)
warnx("Bad privacy type - %s in SNMPPRIV", str);
}
if ((str = getenv("SNMPUSER")) != NULL) {
if ((slen = strlen(str)) > sizeof(snmp_client.user.sec_name)) {
warnx("Username too long - %s in SNMPUSER", str);
return (-1);
}
if (slen > 0) {
strlcpy(snmp_client.user.sec_name, str,
sizeof(snmp_client.user.sec_name));
snmp_client.version = SNMP_V3;
}
}
if ((str = getenv("SNMPPASSWD")) != NULL) {
if ((slen = strlen(str)) > MAXSTR)
slen = MAXSTR - 1;
if ((snmptoolctx->passwd = malloc(slen + 1)) == NULL) {
warn("malloc() failed");
return (-1);
}
if (slen > 0)
strlcpy(snmptoolctx->passwd, str, slen + 1);
}
return (0);
}
#define OBJECT_IDX_LIST(o) o->info->table_idx->index_list
/*
* Walk through the file list and import string<->oid mappings from each file.
*/
int32_t
snmp_import_all(struct snmp_toolinfo *snmptoolctx)
{
int32_t fc;
struct fname *tmp;
if (snmptoolctx == NULL)
return (-1);
if (ISSET_NUMERIC(snmptoolctx))
return (0);
if ((snmptoolctx->mappings = snmp_mapping_init()) == NULL)
return (-1);
fc = 0;
if (SLIST_EMPTY(&snmptoolctx->filelist)) {
warnx("No files to read OID <-> string conversions from");
return (-1);
} else {
SLIST_FOREACH(tmp, &snmptoolctx->filelist, link) {
if (tmp->done)
continue;
if (snmp_import_file(snmptoolctx, tmp) < 0) {
fc = -1;
break;
}
fc++;
}
}
snmp_mapping_dump(snmptoolctx);
return (fc);
}
/*
* Add a filename to the file list - the initial idea of keeping a list with all
* files to read OIDs from was that an application might want to have loaded in
* memory the OIDs from a single file only and when done with them read the OIDs
* from another file. This is not used yet but might be a good idea at some
* point. Size argument is number of bytes in string including trailing '\0',
* not string length.
*/
int32_t
add_filename(struct snmp_toolinfo *snmptoolctx, const char *filename,
const struct asn_oid *cut, int32_t done)
{
char *fstring;
struct fname *entry;
if (snmptoolctx == NULL)
return (-1);
/* Make sure file was not in list. */
SLIST_FOREACH(entry, &snmptoolctx->filelist, link) {
if (strncmp(entry->name, filename, strlen(entry->name)) == 0)
return (0);
}
if ((fstring = strdup(filename)) == NULL) {
warn("strdup() failed");
return (-1);
}
if ((entry = calloc(1, sizeof(struct fname))) == NULL) {
warn("calloc() failed");
free(fstring);
return (-1);
}
if (cut != NULL)
asn_append_oid(&(entry->cut), cut);
entry->name = fstring;
entry->done = done;
SLIST_INSERT_HEAD(&snmptoolctx->filelist, entry, link);
return (1);
}
void
free_filelist(struct snmp_toolinfo *snmptoolctx)
{
struct fname *f;
if (snmptoolctx == NULL)
return; /* XXX error handling */
while ((f = SLIST_FIRST(&snmptoolctx->filelist)) != NULL) {
SLIST_REMOVE_HEAD(&snmptoolctx->filelist, link);
if (f->name)
free(f->name);
free(f);
}
}
static char
isvalid_fchar(char c, int pos)
{
if (isalpha(c)|| c == '/'|| c == '_' || c == '.' || c == '~' ||
(pos != 0 && isdigit(c))){
return (c);
}
if (c == '\0')
return (0);
if (!isascii(c) || !isprint(c))
warnx("Unexpected character %#2x", (u_int) c);
else
warnx("Illegal character '%c'", c);
return (-1);
}
/*
* Re-implement getsubopt from scratch, because the second argument is broken
* and will not compile with WARNS=5.
* Copied from src/contrib/bsnmp/snmpd/main.c.
*/
static int
getsubopt1(char **arg, const char *const *options, char **valp, char **optp)
{
static const char *const delim = ",\t ";
u_int i;
char *ptr;
*optp = NULL;
/* Skip leading junk. */
for (ptr = *arg; *ptr != '\0'; ptr++)
if (strchr(delim, *ptr) == NULL)
break;
if (*ptr == '\0') {
*arg = ptr;
return (-1);
}
*optp = ptr;
/* Find the end of the option. */
while (*++ptr != '\0')
if (strchr(delim, *ptr) != NULL || *ptr == '=')
break;
if (*ptr != '\0') {
if (*ptr == '=') {
*ptr++ = '\0';
*valp = ptr;
while (*ptr != '\0' && strchr(delim, *ptr) == NULL)
ptr++;
if (*ptr != '\0')
*ptr++ = '\0';
} else
*ptr++ = '\0';
}
*arg = ptr;
for (i = 0; *options != NULL; options++, i++)
if (strcmp(*optp, *options) == 0)
return (i);
return (-1);
}
static int32_t
parse_path(char *value)
{
int32_t i, len;
if (value == NULL)
return (-1);
for (len = 0; len < MAXPATHLEN; len++) {
i = isvalid_fchar(*(value + len), len) ;
if (i == 0)
break;
else if (i < 0)
return (-1);
}
if (len >= MAXPATHLEN || value[len] != '\0') {
warnx("Bad pathname - '%s'", value);
return (-1);
}
return (len);
}
static int32_t
parse_flist(struct snmp_toolinfo *snmptoolctx, char *value, char *path,
const struct asn_oid *cut)
{
int32_t namelen;
char filename[MAXPATHLEN + 1];
if (value == NULL)
return (-1);
do {
memset(filename, 0, MAXPATHLEN + 1);
if (isalpha(*value) && (path == NULL || path[0] == '\0')) {
strlcpy(filename, SNMP_DEFS_DIR, MAXPATHLEN + 1);
namelen = strlen(SNMP_DEFS_DIR);
} else if (path != NULL){
strlcpy(filename, path, MAXPATHLEN + 1);
namelen = strlen(path);
} else
namelen = 0;
for ( ; namelen < MAXPATHLEN; value++) {
if (isvalid_fchar(*value, namelen) > 0) {
filename[namelen++] = *value;
continue;
}
if (*value == ',' )
value++;
else if (*value == '\0')
;
else {
if (!isascii(*value) || !isprint(*value))
warnx("Unexpected character %#2x in"
" filename", (u_int) *value);
else
warnx("Illegal character '%c' in"
" filename", *value);
return (-1);
}
filename[namelen]='\0';
break;
}
if ((namelen == MAXPATHLEN) && (filename[MAXPATHLEN] != '\0')) {
warnx("Filename %s too long", filename);
return (-1);
}
if (add_filename(snmptoolctx, filename, cut, 0) < 0) {
warnx("Error adding file %s to list", filename);
return (-1);
}
} while (*value != '\0');
return(1);
}
static int32_t
parse_ascii(char *ascii, uint8_t *binstr, size_t binlen)
{
char dptr[3];
size_t count;
int32_t alen, i, saved_errno;
uint32_t val;
/* Filter 0x at the beginning */
if ((alen = strlen(ascii)) > 2 && ascii[0] == '0' && ascii[1] == 'x')
i = 2;
else
i = 0;
saved_errno = errno;
errno = 0;
for (count = 0; i < alen; i += 2) {
/* XXX: consider strlen(ascii) % 2 != 0 */
dptr[0] = ascii[i];
dptr[1] = ascii[i + 1];
dptr[2] = '\0';
if ((val = strtoul(dptr, NULL, 16)) > 0xFF || errno != 0) {
errno = saved_errno;
return (-1);
}
binstr[count] = (uint8_t) val;
if (++count >= binlen) {
warnx("Key %s too long - truncating to %zu octets",
ascii, binlen);
break;
}
}
return (count);
}
/*
* Functions to parse common input options for client tools and fill in the
* snmp_client structure.
*/
int32_t
parse_authentication(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg)
{
int32_t count, subopt;
char *val, *option;
const char *const subopts[] = {
"proto",
"key",
NULL
};
assert(opt_arg != NULL);
count = 1;
while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) {
switch (subopt) {
case 0:
if (val == NULL) {
warnx("Suboption 'proto' requires an argument");
return (-1);
}
if (strlen(val) != 3) {
warnx("Unknown auth protocol - %s", val);
return (-1);
}
if (strncasecmp("md5", val, strlen("md5")) == 0)
snmp_client.user.auth_proto =
SNMP_AUTH_HMAC_MD5;
else if (strncasecmp("sha", val, strlen("sha")) == 0)
snmp_client.user.auth_proto =
SNMP_AUTH_HMAC_SHA;
else {
warnx("Unknown auth protocol - %s", val);
return (-1);
}
break;
case 1:
if (val == NULL) {
warnx("Suboption 'key' requires an argument");
return (-1);
}
if (parse_ascii(val, snmp_client.user.auth_key,
SNMP_AUTH_KEY_SIZ) < 0) {
warnx("Bad authentication key- %s", val);
return (-1);
}
break;
default:
warnx("Unknown suboption - '%s'", suboptarg);
return (-1);
}
count += 1;
}
return (2/* count */);
}
int32_t
parse_privacy(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg)
{
int32_t count, subopt;
char *val, *option;
const char *const subopts[] = {
"proto",
"key",
NULL
};
assert(opt_arg != NULL);
count = 1;
while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) {
switch (subopt) {
case 0:
if (val == NULL) {
warnx("Suboption 'proto' requires an argument");
return (-1);
}
if (strlen(val) != 3) {
warnx("Unknown privacy protocol - %s", val);
return (-1);
}
if (strncasecmp("aes", val, strlen("aes")) == 0)
snmp_client.user.priv_proto = SNMP_PRIV_AES;
else if (strncasecmp("des", val, strlen("des")) == 0)
snmp_client.user.priv_proto = SNMP_PRIV_DES;
else {
warnx("Unknown privacy protocol - %s", val);
return (-1);
}
break;
case 1:
if (val == NULL) {
warnx("Suboption 'key' requires an argument");
return (-1);
}
if (parse_ascii(val, snmp_client.user.priv_key,
SNMP_PRIV_KEY_SIZ) < 0) {
warnx("Bad privacy key- %s", val);
return (-1);
}
break;
default:
warnx("Unknown suboption - '%s'", suboptarg);
return (-1);
}
count += 1;
}
return (2/* count */);
}
int32_t
parse_context(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg)
{
int32_t count, subopt;
char *val, *option;
const char *const subopts[] = {
"context",
"context-engine",
NULL
};
assert(opt_arg != NULL);
count = 1;
while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) {
switch (subopt) {
case 0:
if (val == NULL) {
warnx("Suboption 'context' - no argument");
return (-1);
}
strlcpy(snmp_client.cname, val, SNMP_CONTEXT_NAME_SIZ);
break;
case 1:
if (val == NULL) {
warnx("Suboption 'context-engine' - no argument");
return (-1);
}
if ((int32_t)(snmp_client.clen = parse_ascii(val,
snmp_client.cengine, SNMP_ENGINE_ID_SIZ)) == -1) {
warnx("Bad EngineID - %s", val);
return (-1);
}
break;
default:
warnx("Unknown suboption - '%s'", suboptarg);
return (-1);
}
count += 1;
}
return (2/* count */);
}
int32_t
parse_user_security(struct snmp_toolinfo *snmptoolctx __unused, char *opt_arg)
{
int32_t count, subopt, saved_errno;
char *val, *option;
const char *const subopts[] = {
"engine",
"engine-boots",
"engine-time",
"name",
NULL
};
assert(opt_arg != NULL);
count = 1;
while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) {
switch (subopt) {
case 0:
if (val == NULL) {
warnx("Suboption 'engine' - no argument");
return (-1);
}
snmp_client.engine.engine_len = parse_ascii(val,
snmp_client.engine.engine_id, SNMP_ENGINE_ID_SIZ);
if ((int32_t)snmp_client.engine.engine_len == -1) {
warnx("Bad EngineID - %s", val);
return (-1);
}
break;
case 1:
if (val == NULL) {
warnx("Suboption 'engine-boots' - no argument");
return (-1);
}
saved_errno = errno;
errno = 0;
snmp_client.engine.engine_boots = strtoul(val, NULL, 10);
if (errno != 0) {
warn("Bad 'engine-boots' value %s", val);
errno = saved_errno;
return (-1);
}
errno = saved_errno;
break;
case 2:
if (val == NULL) {
warnx("Suboption 'engine-time' - no argument");
return (-1);
}
saved_errno = errno;
errno = 0;
snmp_client.engine.engine_time = strtoul(val, NULL, 10);
if (errno != 0) {
warn("Bad 'engine-time' value %s", val);
errno = saved_errno;
return (-1);
}
errno = saved_errno;
break;
case 3:
strlcpy(snmp_client.user.sec_name, val,
SNMP_ADM_STR32_SIZ);
break;
default:
warnx("Unknown suboption - '%s'", suboptarg);
return (-1);
}
count += 1;
}
return (2/* count */);
}
int32_t
parse_file(struct snmp_toolinfo *snmptoolctx, char *opt_arg)
{
assert(opt_arg != NULL);
if (parse_flist(snmptoolctx, opt_arg, NULL, &IsoOrgDod_OID) < 0)
return (-1);
return (2);
}
int32_t
parse_include(struct snmp_toolinfo *snmptoolctx, char *opt_arg)
{
char path[MAXPATHLEN + 1];
int32_t cut_dflt, len, subopt;
struct asn_oid cut;
char *val, *option;
const char *const subopts[] = {
"cut",
"path",
"file",
NULL
};
#define INC_CUT 0
#define INC_PATH 1
#define INC_LIST 2
assert(opt_arg != NULL);
/* if (opt == 'i')
free_filelist(snmptoolctx, ); */
/*
* This function should be called only after getopt(3) - otherwise if
* no previous validation of opt_arg strlen() may not return what is
* expected.
*/
path[0] = '\0';
memset(&cut, 0, sizeof(struct asn_oid));
cut_dflt = -1;
while ((subopt = getsubopt1(&opt_arg, subopts, &val, &option)) != EOF) {
switch (subopt) {
case INC_CUT:
if (val == NULL) {
warnx("Suboption 'cut' requires an argument");
return (-1);
} else {
if (snmp_parse_numoid(val, &cut) < 0)
return (-1);
}
cut_dflt = 1;
break;
case INC_PATH:
if ((len = parse_path(val)) < 0)
return (-1);
strlcpy(path, val, len + 1);
break;
case INC_LIST:
if (val == NULL)
return (-1);
if (cut_dflt == -1)
len = parse_flist(snmptoolctx, val, path, &IsoOrgDod_OID);
else
len = parse_flist(snmptoolctx, val, path, &cut);
if (len < 0)
return (-1);
break;
default:
warnx("Unknown suboption - '%s'", suboptarg);
return (-1);
}
}
/* XXX: Fix me - returning two is wrong here */
return (2);
}
int32_t
parse_server(char *opt_arg)
{
assert(opt_arg != NULL);
if (snmp_parse_server(&snmp_client, opt_arg) < 0)
return (-1);
if (snmp_client.trans > SNMP_TRANS_UDP && snmp_client.chost == NULL) {
if ((snmp_client.chost = malloc(strlen(SNMP_DEFAULT_LOCAL) + 1))
== NULL) {
syslog(LOG_ERR, "malloc() failed: %s", strerror(errno));
return (-1);
}
strcpy(snmp_client.chost, SNMP_DEFAULT_LOCAL);
}
return (2);
}
int32_t
parse_timeout(char *opt_arg)
{
int32_t v, saved_errno;
assert(opt_arg != NULL);
saved_errno = errno;
errno = 0;
v = strtol(opt_arg, NULL, 10);
if (errno != 0) {
warn("Error parsing timeout value");
errno = saved_errno;
return (-1);
}
snmp_client.timeout.tv_sec = v;
errno = saved_errno;
return (2);
}
int32_t
parse_retry(char *opt_arg)
{
uint32_t v;
int32_t saved_errno;
assert(opt_arg != NULL);
saved_errno = errno;
errno = 0;
v = strtoul(opt_arg, NULL, 10);
if (errno != 0) {
warn("Error parsing retries count");
errno = saved_errno;
return (-1);
}
snmp_client.retries = v;
errno = saved_errno;
return (2);
}
int32_t
parse_version(char *opt_arg)
{
uint32_t v;
int32_t saved_errno;
assert(opt_arg != NULL);
saved_errno = errno;
errno = 0;
v = strtoul(opt_arg, NULL, 10);
if (errno != 0) {
warn("Error parsing version");
errno = saved_errno;
return (-1);
}
switch (v) {
case 1:
snmp_client.version = SNMP_V1;
break;
case 2:
snmp_client.version = SNMP_V2c;
break;
case 3:
snmp_client.version = SNMP_V3;
break;
default:
warnx("Unsupported SNMP version - %u", v);
errno = saved_errno;
return (-1);
}
errno = saved_errno;
return (2);
}
int32_t
parse_local_path(char *opt_arg)
{
assert(opt_arg != NULL);
if (sizeof(opt_arg) > sizeof(SNMP_LOCAL_PATH)) {
warnx("Filename too long - %s", opt_arg);
return (-1);
}
strlcpy(snmp_client.local_path, opt_arg, sizeof(SNMP_LOCAL_PATH));
return (2);
}
int32_t
parse_buflen(char *opt_arg)
{
uint32_t size;
int32_t saved_errno;
assert(opt_arg != NULL);
saved_errno = errno;
errno = 0;
size = strtoul(opt_arg, NULL, 10);
if (errno != 0) {
warn("Error parsing buffer size");
errno = saved_errno;
return (-1);
}
if (size > MAX_BUFF_SIZE) {
warnx("Buffer size too big - %d max allowed", MAX_BUFF_SIZE);
errno = saved_errno;
return (-1);
}
snmp_client.txbuflen = snmp_client.rxbuflen = size;
errno = saved_errno;
return (2);
}
int32_t
parse_debug(void)
{
snmp_client.dump_pdus = 1;
return (1);
}
int32_t
parse_discovery(struct snmp_toolinfo *snmptoolctx)
{
SET_EDISCOVER(snmptoolctx);
snmp_client.version = SNMP_V3;
return (1);
}
int32_t
parse_local_key(struct snmp_toolinfo *snmptoolctx)
{
SET_LOCALKEY(snmptoolctx);
snmp_client.version = SNMP_V3;
return (1);
}
int32_t
parse_num_oids(struct snmp_toolinfo *snmptoolctx)
{
SET_NUMERIC(snmptoolctx);
return (1);
}
int32_t
parse_output(struct snmp_toolinfo *snmptoolctx, char *opt_arg)
{
assert(opt_arg != NULL);
if (strlen(opt_arg) > strlen("verbose")) {
warnx( "Invalid output option - %s",opt_arg);
return (-1);
}
if (strncasecmp(opt_arg, "short", strlen(opt_arg)) == 0)
SET_OUTPUT(snmptoolctx, OUTPUT_SHORT);
else if (strncasecmp(opt_arg, "verbose", strlen(opt_arg)) == 0)
SET_OUTPUT(snmptoolctx, OUTPUT_VERBOSE);
else if (strncasecmp(opt_arg,"tabular", strlen(opt_arg)) == 0)
SET_OUTPUT(snmptoolctx, OUTPUT_TABULAR);
else if (strncasecmp(opt_arg, "quiet", strlen(opt_arg)) == 0)
SET_OUTPUT(snmptoolctx, OUTPUT_QUIET);
else {
warnx( "Invalid output option - %s", opt_arg);
return (-1);
}
return (2);
}
int32_t
parse_errors(struct snmp_toolinfo *snmptoolctx)
{
SET_RETRY(snmptoolctx);
return (1);
}
int32_t
parse_skip_access(struct snmp_toolinfo *snmptoolctx)
{
SET_ERRIGNORE(snmptoolctx);
return (1);
}
char *
snmp_parse_suboid(char *str, struct asn_oid *oid)
{
char *endptr;
asn_subid_t suboid;
if (*str == '.')
str++;
if (*str < '0' || *str > '9')
return (str);
do {
suboid = strtoul(str, &endptr, 10);
if ((asn_subid_t) suboid > ASN_MAXID) {
warnx("Suboid %u > ASN_MAXID", suboid);
return (NULL);
}
if (snmp_suboid_append(oid, suboid) < 0)
return (NULL);
str = endptr + 1;
} while (*endptr == '.');
return (endptr);
}
static char *
snmp_int2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr;
int32_t v, saved_errno;
saved_errno = errno;
errno = 0;
v = strtol(str, &endptr, 10);
if (errno != 0) {
warn("Integer value %s not supported", str);
errno = saved_errno;
return (NULL);
}
errno = saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
}
/* It is a bit weird to have a table indexed by OID but still... */
static char *
snmp_oid2asn_oid(struct snmp_toolinfo *snmptoolctx, char *str,
struct asn_oid *oid)
{
int32_t i;
char string[MAXSTR + 1], *endptr;
struct snmp_object obj;
for (i = 0; i < MAXSTR; i++)
if (isalpha (*(str + i)) == 0)
break;
endptr = str + i;
memset(&obj, 0, sizeof(struct snmp_object));
if (i == 0) {
if ((endptr = snmp_parse_suboid(str, &(obj.val.var))) == NULL)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) obj.val.var.len) < 0)
return (NULL);
} else {
strlcpy(string, str, i + 1);
if (snmp_lookup_enumoid(snmptoolctx, &obj, string) < 0) {
warnx("Unknown string - %s", string);
return (NULL);
}
}
asn_append_oid(oid, &(obj.val.var));
return (endptr);
}
static char *
snmp_ip2asn_oid(char *str, struct asn_oid *oid)
{
uint32_t v;
int32_t i;
char *endptr, *ptr;
ptr = str;
for (i = 0; i < 4; i++) {
v = strtoul(ptr, &endptr, 10);
if (v > 0xff)
return (NULL);
if (*endptr != '.' && strchr("],\0", *endptr) == NULL && i != 3)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
ptr = endptr + 1;
}
return (endptr);
}
/* 32-bit counter, gauge, timeticks. */
static char *
snmp_uint2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr;
uint32_t v;
int32_t saved_errno;
saved_errno = errno;
errno = 0;
v = strtoul(str, &endptr, 10);
if (errno != 0) {
warn("Integer value %s not supported", str);
errno = saved_errno;
return (NULL);
}
errno = saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
}
static char *
snmp_cnt64_2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr;
uint64_t v;
int32_t saved_errno;
saved_errno = errno;
errno = 0;
v = strtoull(str, &endptr, 10);
if (errno != 0) {
warn("Integer value %s not supported", str);
errno = saved_errno;
return (NULL);
}
errno = saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) (v & 0xffffffff)) < 0)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) (v >> 32)) < 0)
return (NULL);
return (endptr);
}
enum snmp_syntax
parse_syntax(char *str)
{
int32_t i;
for (i = 0; i < SNMP_SYNTAX_UNKNOWN; i++) {
if (strncmp(syntax_strings[i].str, str,
strlen(syntax_strings[i].str)) == 0)
return (syntax_strings[i].stx);
}
return (SNMP_SYNTAX_NULL);
}
static char *
snmp_parse_subindex(struct snmp_toolinfo *snmptoolctx, char *str,
struct index *idx, struct snmp_object *object)
{
char *ptr;
int32_t i;
enum snmp_syntax stx;
char syntax[MAX_CMD_SYNTAX_LEN];
ptr = str;
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE) {
for (i = 0; i < MAX_CMD_SYNTAX_LEN ; i++) {
if (*(ptr + i) == ':')
break;
}
if (i >= MAX_CMD_SYNTAX_LEN) {
warnx("Unknown syntax in OID - %s", str);
return (NULL);
}
/* Expect a syntax string here. */
if ((stx = parse_syntax(str)) <= SNMP_SYNTAX_NULL) {
warnx("Invalid syntax - %s",syntax);
return (NULL);
}
if (stx != idx->syntax && !ISSET_ERRIGNORE(snmptoolctx)) {
warnx("Syntax mismatch - %d expected, %d given",
idx->syntax, stx);
return (NULL);
}
/*
* That is where the suboid started + the syntax length + one
* character for ':'.
*/
ptr = str + i + 1;
} else
stx = idx->syntax;
switch (stx) {
case SNMP_SYNTAX_INTEGER:
return (snmp_int2asn_oid(ptr, &(object->val.var)));
case SNMP_SYNTAX_OID:
return (snmp_oid2asn_oid(snmptoolctx, ptr,
&(object->val.var)));
case SNMP_SYNTAX_IPADDRESS:
return (snmp_ip2asn_oid(ptr, &(object->val.var)));
case SNMP_SYNTAX_COUNTER:
/* FALLTHROUGH */
case SNMP_SYNTAX_GAUGE:
/* FALLTHROUGH */
case SNMP_SYNTAX_TIMETICKS:
return (snmp_uint2asn_oid(ptr, &(object->val.var)));
case SNMP_SYNTAX_COUNTER64:
return (snmp_cnt64_2asn_oid(ptr, &(object->val.var)));
case SNMP_SYNTAX_OCTETSTRING:
return (snmp_tc2oid(idx->tc, ptr, &(object->val.var)));
default:
/* NOTREACHED */
break;
}
return (NULL);
}
char *
snmp_parse_index(struct snmp_toolinfo *snmptoolctx, char *str,
struct snmp_object *object)
{
char *ptr;
struct index *temp;
if (object->info->table_idx == NULL)
return (NULL);
ptr = NULL;
STAILQ_FOREACH(temp, &(OBJECT_IDX_LIST(object)), link) {
if ((ptr = snmp_parse_subindex(snmptoolctx, str, temp, object))
== NULL)
return (NULL);
if (*ptr != ',' && *ptr != ']')
return (NULL);
str = ptr + 1;
}
if (ptr == NULL || *ptr != ']') {
warnx("Mismatching index - %s", str);
return (NULL);
}
return (ptr + 1);
}
/*
* Fill in the struct asn_oid member of snmp_value with suboids from input.
* If an error occurs - print message on stderr and return (-1).
* If all is ok - return the length of the oid.
*/
int32_t
snmp_parse_numoid(char *argv, struct asn_oid *var)
{
char *endptr, *str;
asn_subid_t suboid;
str = argv;
if (*str == '.')
str++;
do {
if (var->len == ASN_MAXOIDLEN) {
warnx("Oid too long - %u", var->len);
return (-1);
}
suboid = strtoul(str, &endptr, 10);
if (suboid > ASN_MAXID) {
warnx("Oid too long - %u", var->len);
return (-1);
}
var->subs[var->len++] = suboid;
str = endptr + 1;
} while ( *endptr == '.');
if (*endptr != '\0') {
warnx("Invalid oid string - %s", argv);
return (-1);
}
return (var->len);
}
/* Append a length 1 suboid to an asn_oid structure. */
int32_t
snmp_suboid_append(struct asn_oid *var, asn_subid_t suboid)
{
if (var == NULL)
return (-1);
if (var->len >= ASN_MAXOIDLEN) {
warnx("Oid too long - %u", var->len);
return (-1);
}
var->subs[var->len++] = suboid;
return (1);
}
/* Pop the last suboid from an asn_oid structure. */
int32_t
snmp_suboid_pop(struct asn_oid *var)
{
asn_subid_t suboid;
if (var == NULL)
return (-1);
if (var->len < 1)
return (-1);
suboid = var->subs[--(var->len)];
var->subs[var->len] = 0;
return (suboid);
}
/*
* Parse the command-line provided string into an OID - alocate memory for a new
* snmp object, fill in its fields and insert it in the object list. A
* (snmp_verify_inoid_f) function must be provided to validate the input string.
*/
int32_t
snmp_object_add(struct snmp_toolinfo *snmptoolctx, snmp_verify_inoid_f func,
char *string)
{
struct snmp_object *obj;
if (snmptoolctx == NULL)
return (-1);
/* XXX-BZ does that chack make sense? */
if (snmptoolctx->objects >= SNMP_MAX_BINDINGS) {
warnx("Too many bindings in PDU - %u", snmptoolctx->objects + 1);
return (-1);
}
if ((obj = calloc(1, sizeof(struct snmp_object))) == NULL) {
syslog(LOG_ERR, "malloc() failed: %s", strerror(errno));
return (-1);
}
if (func(snmptoolctx, obj, string) < 0) {
warnx("Invalid OID - %s", string);
free(obj);
return (-1);
}
snmptoolctx->objects++;
SLIST_INSERT_HEAD(&snmptoolctx->snmp_objectlist, obj, link);
return (1);
}
/* Given an OID, find it in the object list and remove it. */
int32_t
snmp_object_remove(struct snmp_toolinfo *snmptoolctx, struct asn_oid *oid)
{
struct snmp_object *temp;
if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist)) {
warnx("Object list already empty");
return (-1);
}
SLIST_FOREACH(temp, &snmptoolctx->snmp_objectlist, link)
if (asn_compare_oid(&(temp->val.var), oid) == 0)
break;
if (temp == NULL) {
warnx("No such object in list");
return (-1);
}
SLIST_REMOVE(&snmptoolctx->snmp_objectlist, temp, snmp_object, link);
if (temp->val.syntax == SNMP_SYNTAX_OCTETSTRING &&
temp->val.v.octetstring.octets != NULL)
free(temp->val.v.octetstring.octets);
free(temp);
return (1);
}
static void
snmp_object_freeall(struct snmp_toolinfo *snmptoolctx)
{
struct snmp_object *o;
while ((o = SLIST_FIRST(&snmptoolctx->snmp_objectlist)) != NULL) {
SLIST_REMOVE_HEAD(&snmptoolctx->snmp_objectlist, link);
if (o->val.syntax == SNMP_SYNTAX_OCTETSTRING &&
o->val.v.octetstring.octets != NULL)
free(o->val.v.octetstring.octets);
free(o);
}
}
/* Do all possible memory release before exit. */
void
snmp_tool_freeall(struct snmp_toolinfo *snmptoolctx)
{
if (snmp_client.chost != NULL) {
free(snmp_client.chost);
snmp_client.chost = NULL;
}
if (snmp_client.cport != NULL) {
free(snmp_client.cport);
snmp_client.cport = NULL;
}
snmp_mapping_free(snmptoolctx);
free_filelist(snmptoolctx);
snmp_object_freeall(snmptoolctx);
if (snmptoolctx->passwd != NULL) {
free(snmptoolctx->passwd);
snmptoolctx->passwd = NULL;
}
}
/*
* Fill all variables from the object list into a PDU. (snmp_verify_vbind_f)
* function should check whether the variable is consistent in this PDU
* (e.g do not add non-leaf OIDs to a GET PDU, or OIDs with read access only to
* a SET PDU) - might be NULL though. (snmp_add_vbind_f) function is the
* function actually adds the variable to the PDU and must not be NULL.
*/
int32_t
snmp_pdu_add_bindings(struct snmp_toolinfo *snmptoolctx,
snmp_verify_vbind_f vfunc, snmp_add_vbind_f afunc,
struct snmp_pdu *pdu, int32_t maxcount)
{
int32_t nbindings, abind;
struct snmp_object *obj;
if (pdu == NULL || afunc == NULL)
return (-1);
/* Return 0 in case of no more work todo. */
if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist))
return (0);
if (maxcount < 0 || maxcount > SNMP_MAX_BINDINGS) {
warnx("maxcount out of range: <0 || >SNMP_MAX_BINDINGS");
return (-1);
}
nbindings = 0;
SLIST_FOREACH(obj, &snmptoolctx->snmp_objectlist, link) {
if ((vfunc != NULL) && (vfunc(snmptoolctx, pdu, obj) < 0)) {
nbindings = -1;
break;
}
if ((abind = afunc(pdu, obj)) < 0) {
nbindings = -1;
break;
}
if (abind > 0) {
/* Do not put more varbindings than requested. */
if (++nbindings >= maxcount)
break;
}
}
return (nbindings);
}
/*
* Locate an object in the object list and set a corresponding error status.
*/
int32_t
snmp_object_seterror(struct snmp_toolinfo *snmptoolctx,
struct snmp_value *err_value, int32_t error_status)
{
struct snmp_object *obj;
if (SLIST_EMPTY(&snmptoolctx->snmp_objectlist) || err_value == NULL)
return (-1);
SLIST_FOREACH(obj, &snmptoolctx->snmp_objectlist, link)
if (asn_compare_oid(&(err_value->var), &(obj->val.var)) == 0) {
obj->error = error_status;
return (1);
}
return (0);
}
/*
* Check a PDU received in response to a SNMP_PDU_GET/SNMP_PDU_GETBULK request
* but don't compare syntaxes - when sending a request PDU they must be null.
* This is a (almost) complete copy of snmp_pdu_check() - with matching syntaxes
* checks and some other checks skipped.
*/
int32_t
snmp_parse_get_resp(struct snmp_pdu *resp, struct snmp_pdu *req)
{
uint32_t i;
for (i = 0; i < req->nbindings; i++) {
if (asn_compare_oid(&req->bindings[i].var,
&resp->bindings[i].var) != 0) {
warnx("Bad OID in response");
return (-1);
}
if (snmp_client.version != SNMP_V1 && (resp->bindings[i].syntax
== SNMP_SYNTAX_NOSUCHOBJECT || resp->bindings[i].syntax ==
SNMP_SYNTAX_NOSUCHINSTANCE))
return (0);
}
return (1);
}
int32_t
snmp_parse_getbulk_resp(struct snmp_pdu *resp, struct snmp_pdu *req)
{
int32_t N, R, M, r;
if (req->error_status > (int32_t) resp->nbindings) {
warnx("Bad number of bindings in response");
return (-1);
}
for (N = 0; N < req->error_status; N++) {
if (asn_is_suboid(&req->bindings[N].var,
&resp->bindings[N].var) == 0)
return (0);
if (resp->bindings[N].syntax == SNMP_SYNTAX_ENDOFMIBVIEW)
return (0);
}
for (R = N , r = N; R < (int32_t) req->nbindings; R++) {
for (M = 0; M < req->error_index && (r + M) <
(int32_t) resp->nbindings; M++) {
if (asn_is_suboid(&req->bindings[R].var,
&resp->bindings[r + M].var) == 0)
return (0);
if (resp->bindings[r + M].syntax ==
SNMP_SYNTAX_ENDOFMIBVIEW) {
M++;
break;
}
}
r += M;
}
return (0);
}
int32_t
snmp_parse_getnext_resp(struct snmp_pdu *resp, struct snmp_pdu *req)
{
uint32_t i;
for (i = 0; i < req->nbindings; i++) {
if (asn_is_suboid(&req->bindings[i].var, &resp->bindings[i].var)
== 0)
return (0);
if (resp->version != SNMP_V1 && resp->bindings[i].syntax ==
SNMP_SYNTAX_ENDOFMIBVIEW)
return (0);
}
return (1);
}
/*
* Should be called to check a response to get/getnext/getbulk.
*/
int32_t
snmp_parse_resp(struct snmp_pdu *resp, struct snmp_pdu *req)
{
if (resp == NULL || req == NULL)
return (-2);
if (resp->version != req->version) {
warnx("Response has wrong version");
return (-1);
}
if (resp->error_status == SNMP_ERR_NOSUCHNAME) {
warnx("Error - No Such Name");
return (0);
}
if (resp->error_status != SNMP_ERR_NOERROR) {
warnx("Error %d in response", resp->error_status);
return (-1);
}
if (resp->nbindings != req->nbindings && req->type != SNMP_PDU_GETBULK){
warnx("Bad number of bindings in response");
return (-1);
}
switch (req->type) {
case SNMP_PDU_GET:
return (snmp_parse_get_resp(resp,req));
case SNMP_PDU_GETBULK:
return (snmp_parse_getbulk_resp(resp,req));
case SNMP_PDU_GETNEXT:
return (snmp_parse_getnext_resp(resp,req));
default:
/* NOTREACHED */
break;
}
return (-2);
}
static void
snmp_output_octetstring(struct snmp_toolinfo *snmptoolctx, enum snmp_tc tc,
uint32_t len, uint8_t *octets)
{
char *buf;
if (len == 0 || octets == NULL)
return;
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_OCTETSTRING].str);
if ((buf = snmp_oct2tc(tc, len, (char *) octets)) != NULL) {
fprintf(stdout, "%s", buf);
free(buf);
}
}
static void
snmp_output_octetindex(struct snmp_toolinfo *snmptoolctx, enum snmp_tc tc,
struct asn_oid *oid)
{
uint32_t i;
uint8_t *s;
if ((s = malloc(oid->subs[0] + 1)) == NULL)
syslog(LOG_ERR, "malloc failed - %s", strerror(errno));
else {
for (i = 0; i < oid->subs[0]; i++)
s[i] = (u_char) (oid->subs[i + 1]);
snmp_output_octetstring(snmptoolctx, tc, oid->subs[0], s);
free(s);
}
}
/*
* Check and output syntax type and value.
*/
static void
snmp_output_oid_value(struct snmp_toolinfo *snmptoolctx, struct asn_oid *oid)
{
char oid_string[ASN_OIDSTRLEN];
struct snmp_object obj;
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_OID].str);
if(!ISSET_NUMERIC(snmptoolctx)) {
memset(&obj, 0, sizeof(struct snmp_object));
asn_append_oid(&(obj.val.var), oid);
if (snmp_lookup_enumstring(snmptoolctx, &obj) > 0)
fprintf(stdout, "%s" , obj.info->string);
else if (snmp_lookup_oidstring(snmptoolctx, &obj) > 0)
fprintf(stdout, "%s" , obj.info->string);
else if (snmp_lookup_nodestring(snmptoolctx, &obj) > 0)
fprintf(stdout, "%s" , obj.info->string);
else {
(void) asn_oid2str_r(oid, oid_string);
fprintf(stdout, "%s", oid_string);
}
} else {
(void) asn_oid2str_r(oid, oid_string);
fprintf(stdout, "%s", oid_string);
}
}
static void
snmp_output_int(struct snmp_toolinfo *snmptoolctx, struct enum_pairs *enums,
int32_t int_val)
{
char *string;
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_INTEGER].str);
if (enums != NULL && (string = enum_string_lookup(enums, int_val))
!= NULL)
fprintf(stdout, "%s", string);
else
fprintf(stdout, "%d", int_val);
}
static void
snmp_output_ipaddress(struct snmp_toolinfo *snmptoolctx, uint8_t *ip)
{
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_IPADDRESS].str);
fprintf(stdout, "%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3]);
}
static void
snmp_output_counter(struct snmp_toolinfo *snmptoolctx, uint32_t counter)
{
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_COUNTER].str);
fprintf(stdout, "%u", counter);
}
static void
snmp_output_gauge(struct snmp_toolinfo *snmptoolctx, uint32_t gauge)
{
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ", syntax_strings[SNMP_SYNTAX_GAUGE].str);
fprintf(stdout, "%u", gauge);
}
static void
snmp_output_ticks(struct snmp_toolinfo *snmptoolctx, uint32_t ticks)
{
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_TIMETICKS].str);
fprintf(stdout, "%u", ticks);
}
static void
snmp_output_counter64(struct snmp_toolinfo *snmptoolctx, uint64_t counter64)
{
if (GET_OUTPUT(snmptoolctx) == OUTPUT_VERBOSE)
fprintf(stdout, "%s : ",
syntax_strings[SNMP_SYNTAX_COUNTER64].str);
fprintf(stdout,"%ju", counter64);
}
int32_t
snmp_output_numval(struct snmp_toolinfo *snmptoolctx, struct snmp_value *val,
struct snmp_oid2str *entry)
{
if (val == NULL)
return (-1);
if (GET_OUTPUT(snmptoolctx) != OUTPUT_QUIET)
fprintf(stdout, " = ");
switch (val->syntax) {
case SNMP_SYNTAX_INTEGER:
if (entry != NULL)
snmp_output_int(snmptoolctx, entry->snmp_enum,
val->v.integer);
else
snmp_output_int(snmptoolctx, NULL, val->v.integer);
break;
case SNMP_SYNTAX_OCTETSTRING:
if (entry != NULL)
snmp_output_octetstring(snmptoolctx, entry->tc,
val->v.octetstring.len, val->v.octetstring.octets);
else
snmp_output_octetstring(snmptoolctx, SNMP_STRING,
val->v.octetstring.len, val->v.octetstring.octets);
break;
case SNMP_SYNTAX_OID:
snmp_output_oid_value(snmptoolctx, &(val->v.oid));
break;
case SNMP_SYNTAX_IPADDRESS:
snmp_output_ipaddress(snmptoolctx, val->v.ipaddress);
break;
case SNMP_SYNTAX_COUNTER:
snmp_output_counter(snmptoolctx, val->v.uint32);
break;
case SNMP_SYNTAX_GAUGE:
snmp_output_gauge(snmptoolctx, val->v.uint32);
break;
case SNMP_SYNTAX_TIMETICKS:
snmp_output_ticks(snmptoolctx, val->v.uint32);
break;
case SNMP_SYNTAX_COUNTER64:
snmp_output_counter64(snmptoolctx, val->v.counter64);
break;
case SNMP_SYNTAX_NOSUCHOBJECT:
fprintf(stderr, "No Such Object\n");
return (val->syntax);
case SNMP_SYNTAX_NOSUCHINSTANCE:
fprintf(stderr, "No Such Instance\n");
return (val->syntax);
case SNMP_SYNTAX_ENDOFMIBVIEW:
fprintf(stdout, "End of Mib View\n");
return (val->syntax);
case SNMP_SYNTAX_NULL:
/* NOTREACHED */
fprintf(stderr, "agent returned NULL Syntax\n");
return (val->syntax);
default:
/* NOTREACHED - If here - then all went completely wrong. */
fprintf(stderr, "agent returned unknown syntax\n");
return (-1);
}
fprintf(stdout, "\n");
return (0);
}
static int32_t
snmp_fill_object(struct snmp_toolinfo *snmptoolctx, struct snmp_object *obj,
struct snmp_value *val)
{
int32_t rc;
asn_subid_t suboid;
if (obj == NULL || val == NULL)
return (-1);
if ((suboid = snmp_suboid_pop(&(val->var))) > ASN_MAXID)
return (-1);
memset(obj, 0, sizeof(struct snmp_object));
asn_append_oid(&(obj->val.var), &(val->var));
obj->val.syntax = val->syntax;
if (obj->val.syntax > 0)
rc = snmp_lookup_leafstring(snmptoolctx, obj);
else
rc = snmp_lookup_nonleaf_string(snmptoolctx, obj);
(void) snmp_suboid_append(&(val->var), suboid);
(void) snmp_suboid_append(&(obj->val.var), suboid);
return (rc);
}
static int32_t
snmp_output_index(struct snmp_toolinfo *snmptoolctx, struct index *stx,
struct asn_oid *oid)
{
uint8_t ip[4];
uint32_t bytes = 1;
uint64_t cnt64;
struct asn_oid temp, out;
if (oid->len < bytes)
return (-1);
memset(&temp, 0, sizeof(struct asn_oid));
asn_append_oid(&temp, oid);
switch (stx->syntax) {
case SNMP_SYNTAX_INTEGER:
snmp_output_int(snmptoolctx, stx->snmp_enum, temp.subs[0]);
break;
case SNMP_SYNTAX_OCTETSTRING:
if ((temp.subs[0] > temp.len -1 ) || (temp.subs[0] >
ASN_MAXOCTETSTRING))
return (-1);
snmp_output_octetindex(snmptoolctx, stx->tc, &temp);
bytes += temp.subs[0];
break;
case SNMP_SYNTAX_OID:
if ((temp.subs[0] > temp.len -1) || (temp.subs[0] >
ASN_MAXOIDLEN))
return (-1);
bytes += temp.subs[0];
memset(&out, 0, sizeof(struct asn_oid));
asn_slice_oid(&out, &temp, 1, bytes);
snmp_output_oid_value(snmptoolctx, &out);
break;
case SNMP_SYNTAX_IPADDRESS:
if (temp.len < 4)
return (-1);
for (bytes = 0; bytes < 4; bytes++)
ip[bytes] = temp.subs[bytes];
snmp_output_ipaddress(snmptoolctx, ip);
bytes = 4;
break;
case SNMP_SYNTAX_COUNTER:
snmp_output_counter(snmptoolctx, temp.subs[0]);
break;
case SNMP_SYNTAX_GAUGE:
snmp_output_gauge(snmptoolctx, temp.subs[0]);
break;
case SNMP_SYNTAX_TIMETICKS:
snmp_output_ticks(snmptoolctx, temp.subs[0]);
break;
case SNMP_SYNTAX_COUNTER64:
if (oid->len < 2)
return (-1);
bytes = 2;
memcpy(&cnt64, temp.subs, bytes);
snmp_output_counter64(snmptoolctx, cnt64);
break;
default:
return (-1);
}
return (bytes);
}
static int32_t
snmp_output_object(struct snmp_toolinfo *snmptoolctx, struct snmp_object *o)
{
int32_t i, first, len;
struct asn_oid oid;
struct index *temp;
if (ISSET_NUMERIC(snmptoolctx))
return (-1);
if (o->info->table_idx == NULL) {
fprintf(stdout,"%s.%d", o->info->string,
o->val.var.subs[o->val.var.len - 1]);
return (1);
}
fprintf(stdout,"%s[", o->info->string);
memset(&oid, 0, sizeof(struct asn_oid));
len = 1;
asn_slice_oid(&oid, &(o->val.var), (o->info->table_idx->var.len + len),
o->val.var.len);
first = 1;
STAILQ_FOREACH(temp, &(OBJECT_IDX_LIST(o)), link) {
if(first)
first = 0;
else
fprintf(stdout, ", ");
if ((i = snmp_output_index(snmptoolctx, temp, &oid)) < 0)
break;
len += i;
memset(&oid, 0, sizeof(struct asn_oid));
asn_slice_oid(&oid, &(o->val.var),
(o->info->table_idx->var.len + len), o->val.var.len + 1);
}
fprintf(stdout,"]");
return (1);
}
void
snmp_output_err_resp(struct snmp_toolinfo *snmptoolctx, struct snmp_pdu *pdu)
{
struct snmp_object *object;
char buf[ASN_OIDSTRLEN];
if (pdu == NULL || (pdu->error_index > (int32_t) pdu->nbindings)) {
fprintf(stdout, "Invalid error index in PDU\n");
return;
}
if ((object = calloc(1, sizeof(struct snmp_object))) == NULL) {
fprintf(stdout, "calloc: %s", strerror(errno));
return;
}
fprintf(stdout, "Agent %s:%s returned error \n", snmp_client.chost,
snmp_client.cport);
if (!ISSET_NUMERIC(snmptoolctx) && (snmp_fill_object(snmptoolctx, object,
&(pdu->bindings[pdu->error_index - 1])) > 0))
snmp_output_object(snmptoolctx, object);
else {
asn_oid2str_r(&(pdu->bindings[pdu->error_index - 1].var), buf);
fprintf(stdout,"%s", buf);
}
fprintf(stdout," caused error - ");
if ((pdu->error_status > 0) && (pdu->error_status <=
SNMP_ERR_INCONS_NAME))
fprintf(stdout, "%s\n", error_strings[pdu->error_status].str);
else
fprintf(stdout,"%s\n", error_strings[SNMP_ERR_UNKNOWN].str);
free(object);
object = NULL;
}
int32_t
snmp_output_resp(struct snmp_toolinfo *snmptoolctx, struct snmp_pdu *pdu,
struct asn_oid *root)
{
struct snmp_object *object;
char p[ASN_OIDSTRLEN];
int32_t error;
uint32_t i;
if ((object = calloc(1, sizeof(struct snmp_object))) == NULL)
return (-1);
i = error = 0;
while (i < pdu->nbindings) {
if (root != NULL && !(asn_is_suboid(root,
&(pdu->bindings[i].var))))
break;
if (GET_OUTPUT(snmptoolctx) != OUTPUT_QUIET) {
if (!ISSET_NUMERIC(snmptoolctx) &&
(snmp_fill_object(snmptoolctx, object,
&(pdu->bindings[i])) > 0))
snmp_output_object(snmptoolctx, object);
else {
asn_oid2str_r(&(pdu->bindings[i].var), p);
fprintf(stdout, "%s", p);
}
}
error |= snmp_output_numval(snmptoolctx, &(pdu->bindings[i]),
object->info);
i++;
}
free(object);
object = NULL;
if (error)
return (-1);
return (i);
}
void
snmp_output_engine(void)
{
uint32_t i;
char *cptr, engine[2 * SNMP_ENGINE_ID_SIZ + 2];
cptr = engine;
for (i = 0; i < snmp_client.engine.engine_len; i++)
cptr += sprintf(cptr, "%.2x", snmp_client.engine.engine_id[i]);
*cptr++ = '\0';
fprintf(stdout, "Engine ID 0x%s\n", engine);
fprintf(stdout, "Boots : %u\t\tTime : %d\n",
snmp_client.engine.engine_boots,
snmp_client.engine.engine_time);
}
void
snmp_output_keys(void)
{
uint32_t i, keylen = 0;
char *cptr, extkey[2 * SNMP_AUTH_KEY_SIZ + 2];
fprintf(stdout, "Localized keys for %s\n", snmp_client.user.sec_name);
if (snmp_client.user.auth_proto == SNMP_AUTH_HMAC_MD5) {
fprintf(stdout, "MD5 : 0x");
keylen = SNMP_AUTH_HMACMD5_KEY_SIZ;
} else if (snmp_client.user.auth_proto == SNMP_AUTH_HMAC_SHA) {
fprintf(stdout, "SHA : 0x");
keylen = SNMP_AUTH_HMACSHA_KEY_SIZ;
}
if (snmp_client.user.auth_proto != SNMP_AUTH_NOAUTH) {
cptr = extkey;
for (i = 0; i < keylen; i++)
cptr += sprintf(cptr, "%.2x",
snmp_client.user.auth_key[i]);
*cptr++ = '\0';
fprintf(stdout, "%s\n", extkey);
}
if (snmp_client.user.priv_proto == SNMP_PRIV_DES) {
fprintf(stdout, "DES : 0x");
keylen = SNMP_PRIV_DES_KEY_SIZ;
} else if (snmp_client.user.priv_proto == SNMP_PRIV_AES) {
fprintf(stdout, "AES : 0x");
keylen = SNMP_PRIV_AES_KEY_SIZ;
}
if (snmp_client.user.priv_proto != SNMP_PRIV_NOPRIV) {
cptr = extkey;
for (i = 0; i < keylen; i++)
cptr += sprintf(cptr, "%.2x",
snmp_client.user.priv_key[i]);
*cptr++ = '\0';
fprintf(stdout, "%s\n", extkey);
}
}
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