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freebsd-dev/usr.sbin/bsnmpd/tools/libbsnmptools/bsnmptc.c
Enji Cooper c4114bd1f5 Set value->v.octetstring.len to a correct value on malloc success/failure 
The previous code always set value->v.octetstring.len to len, regardless
of the result from the malloc call. This misleads the caller on malloc
failure. Set .len to len on success and 0 on failure.

MFC after:	1 week
Reported by:	Coverity
CID:		1007590
2016-12-31 12:14:25 +00:00

1300 lines
30 KiB
C
Raw Blame History

/*-
* Copyright (c) 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.
*
* Textual conventions for OctetStrings
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/uio.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 <arpa/inet.h>
#include <netinet/in.h>
#include <bsnmp/asn1.h>
#include <bsnmp/snmp.h>
#include "bsnmptc.h"
#include "bsnmptools.h"
/* OctetString, DisplayString */
static char *snmp_oct2str(uint32_t, char *, char *);
static char *snmp_str2asn_oid(char *, struct asn_oid *);
static int parse_octetstring(struct snmp_value *, char *);
/* DateAndTime */
static char *snmp_octstr2date(uint32_t, char *, char *);
static char *snmp_date2asn_oid(char * , struct asn_oid *);
static int parse_dateandtime(struct snmp_value *, char *);
/* PhysAddress */
static char *snmp_oct2physAddr(uint32_t, char *, char *);
static char *snmp_addr2asn_oid(char *, struct asn_oid *);
static int parse_physaddress(struct snmp_value *, char *);
/* NTPTimeStamp */
static char *snmp_oct2ntp_ts(uint32_t, char *, char *);
static char *snmp_ntp_ts2asn_oid(char *, struct asn_oid *);
static int parse_ntp_ts(struct snmp_value *, char *);
/* BridgeId */
static char *snmp_oct2bridgeid(uint32_t, char *, char *);
static char *snmp_bridgeid2oct(char *, struct asn_oid *);
static int parse_bridge_id(struct snmp_value *, char *);
/* BridgePortId */
static char *snmp_oct2bport_id(uint32_t, char *, char *);
static char *snmp_bport_id2oct(char *, struct asn_oid *);
static int parse_bport_id(struct snmp_value *, char *);
/* InetAddress */
static char *snmp_oct2inetaddr(uint32_t len, char *octets, char *buf);
static char *snmp_inetaddr2oct(char *str, struct asn_oid *oid);
static int32_t parse_inetaddr(struct snmp_value *value, char *string);
static char *snmp_oct2bits(uint32_t len, char *octets, char *buf);
static char *snmp_bits2oct(char *str, struct asn_oid *oid);
static int32_t parse_bits(struct snmp_value *value, char *string);
static struct snmp_text_conv {
enum snmp_tc tc;
const char *tc_str;
int32_t len;
snmp_oct2tc_f oct2tc;
snmp_tc2oid_f tc2oid;
snmp_tc2oct_f tc2oct;
} text_convs[] = {
{ SNMP_STRING, "OctetString", SNMP_VAR_STRSZ,
snmp_oct2str, snmp_str2asn_oid, parse_octetstring },
{ SNMP_DISPLAYSTRING, "DisplayString" , SNMP_VAR_STRSZ,
snmp_oct2str, snmp_str2asn_oid, parse_octetstring },
{ SNMP_DATEANDTIME, "DateAndTime", SNMP_DATETIME_STRSZ,
snmp_octstr2date, snmp_date2asn_oid, parse_dateandtime },
{ SNMP_PHYSADDR, "PhysAddress", SNMP_PHYSADDR_STRSZ,
snmp_oct2physAddr, snmp_addr2asn_oid, parse_physaddress },
{ SNMP_ATMESI, "AtmESI", SNMP_PHYSADDR_STRSZ,
snmp_oct2physAddr, snmp_addr2asn_oid, parse_physaddress },
{ SNMP_NTP_TIMESTAMP, "NTPTimeStamp", SNMP_NTP_TS_STRSZ,
snmp_oct2ntp_ts, snmp_ntp_ts2asn_oid, parse_ntp_ts },
{ SNMP_MACADDRESS, "MacAddress", SNMP_PHYSADDR_STRSZ,
snmp_oct2physAddr, snmp_addr2asn_oid, parse_physaddress },
{ SNMP_BRIDGE_ID, "BridgeId", SNMP_BRIDGEID_STRSZ,
snmp_oct2bridgeid, snmp_bridgeid2oct, parse_bridge_id },
{ SNMP_BPORT_ID, "BridgePortId", SNMP_BPORT_STRSZ,
snmp_oct2bport_id, snmp_bport_id2oct, parse_bport_id },
{ SNMP_INETADDRESS, "InetAddress", SNMP_INADDRS_STRSZ,
snmp_oct2inetaddr, snmp_inetaddr2oct, parse_inetaddr },
{ SNMP_TC_OWN, "BITS", SNMP_VAR_STRSZ,
snmp_oct2bits, snmp_bits2oct, parse_bits },
{ SNMP_UNKNOWN, "Unknown", SNMP_VAR_STRSZ, snmp_oct2str,
snmp_str2asn_oid, parse_octetstring } /* keep last */
};
/* Common API */
enum snmp_tc
snmp_get_tc(char *str)
{
int i;
for (i = 0; i < SNMP_UNKNOWN; i++) {
if (!strncmp(text_convs[i].tc_str, str,
strlen(text_convs[i].tc_str)))
return (text_convs[i].tc);
}
return (SNMP_STRING);
}
char *
snmp_oct2tc(enum snmp_tc tc, uint32_t len, char *octets)
{
uint32_t tc_len;
char * buf;
if (tc > SNMP_UNKNOWN)
tc = SNMP_UNKNOWN;
if (text_convs[tc].len > 0)
tc_len = text_convs[tc].len;
else
tc_len = 2 * len + 3;
if ((buf = malloc(tc_len)) == NULL ) {
syslog(LOG_ERR, "malloc failed - %s", strerror(errno));
return (NULL);
}
memset(buf, 0, tc_len);
if (text_convs[tc].oct2tc(len, octets, buf) == NULL) {
free(buf);
return (NULL);
}
return (buf);
}
char *
snmp_tc2oid(enum snmp_tc tc, char *str, struct asn_oid *oid)
{
if (tc > SNMP_UNKNOWN)
tc = SNMP_UNKNOWN;
return (text_convs[tc].tc2oid(str, oid));
}
int32_t
snmp_tc2oct(enum snmp_tc tc, struct snmp_value *value, char *string)
{
if (tc > SNMP_UNKNOWN)
tc = SNMP_UNKNOWN;
return (text_convs[tc].tc2oct(value, string));
}
/*****************************************************
* Basic OctetString type.
*/
static char *
snmp_oct2str(uint32_t len, char *octets, char *buf)
{
uint8_t binary = 0;
uint32_t i;
char *ptr;
if (len > MAX_OCTSTRING_LEN || octets == NULL || buf == NULL)
return (NULL);
for (ptr = buf, i = 0; i < len; i++)
if (!isprint(octets[i])) {
binary = 1;
buf += sprintf(buf, "0x");
break;
}
for (ptr = buf, i = 0; i < len; i++)
if (!binary)
ptr += sprintf(ptr, "%c", octets[i]);
else
ptr += sprintf(ptr, "%2.2x", (u_char)octets[i]);
return (buf);
}
static char *
snmp_str2asn_oid(char *str, struct asn_oid *oid)
{
uint32_t i, len = 0;
/*
* OctetStrings are allowed max length of ASN_MAXOCTETSTRING,
* but trying to index an entry with such a long OctetString
* will fail anyway.
*/
for (len = 0; len < ASN_MAXOIDLEN; len++) {
if (strchr(",]", *(str + len)) != NULL)
break;
}
if (len >= ASN_MAXOIDLEN)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) len) < 0)
return (NULL);
for (i = 0; i < len; i++)
if (snmp_suboid_append(oid, (asn_subid_t) *(str + i)) < 0)
return (NULL);
return (str + len);
}
static int32_t
parse_octetstring(struct snmp_value *value, char *val)
{
size_t len;
if ((len = strlen(val)) >= MAX_OCTSTRING_LEN) {
warnx("Octetstring too long - %d is max allowed",
MAX_OCTSTRING_LEN - 1);
return (-1);
}
if ((value->v.octetstring.octets = malloc(len)) == NULL) {
value->v.octetstring.len = 0;
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
value->v.octetstring.len = len;
memcpy(value->v.octetstring.octets, val, len);
value->syntax = SNMP_SYNTAX_OCTETSTRING;
return (0);
}
/*************************************************************
* DateAndTime
*************************************************************
* rfc 2579 specification:
* DateAndTime ::= TEXTUAL-CONVENTION
* DISPLAY-HINT "2d-1d-1d,1d:1d:1d.1d,1a1d:1d"
* STATUS current
* DESCRIPTION
* "A date-time specification.
*
* field octets contents range
* ----- ------ -------- -----
* 1 1-2 year* 0..65536
* 2 3 month 1..12
* 3 4 day 1..31
* 4 5 hour 0..23
* 5 6 minutes 0..59
* 6 7 seconds 0..60
* (use 60 for leap-second)
* 7 8 deci-seconds 0..9
* 8 9 direction from UTC '+' / '-'
* 9 10 hours from UTC* 0..13
* 10 11 minutes from UTC 0..59
*
* * Notes:
* - the value of year is in network-byte order
* - daylight saving time in New Zealand is +13
*
* For example, Tuesday May 26, 1992 at 1:30:15 PM EDT would be
* displayed as:
*
* 1992-5-26,13:30:15.0,-4:0
*/
static char *
snmp_octstr2date(uint32_t len, char *octets, char *buf)
{
int year;
char *ptr;
if (len != SNMP_DATETIME_OCTETS || octets == NULL || buf == NULL)
return (NULL);
buf[0]= '\0';
year = (octets[0] << 8);
year += (octets[1]);
ptr = buf;
ptr += sprintf(ptr, "%4.4d-%.2d-%.2d, ", year, octets[2],octets[3]);
ptr += sprintf(ptr, "%2.2d:%2.2d:%2.2d.%.2d, ", octets[4],octets[5],
octets[6],octets[7]);
ptr += sprintf(ptr, "%c%.2d:%.2d", octets[8],octets[9],octets[10]);
return (buf);
}
static char *
snmp_date2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr, *ptr;
static const char UTC[3] = "UTC";
int32_t saved_errno;
uint32_t v;
if (snmp_suboid_append(oid, (asn_subid_t) SNMP_DATETIME_OCTETS) < 0)
return (NULL);
/* Read 'YYYY-' and write it in two subs. */
ptr = str;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (v > 0xffff)
goto error;
else
errno = saved_errno;
if (*endptr != '-')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) ((v & 0xff00) >> 8)) < 0)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) (v & 0xff)) < 0)
return (NULL);
/* 'MM-' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != '-')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'DD,' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != '-')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'HH:' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != ':')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'MM:' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != ':')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'SS.' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != '.')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'M(mseconds),' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != ',')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'UTC' - optional */
ptr = endptr + 1;
if (strncmp(ptr, UTC, sizeof(UTC)) == 0)
ptr += sizeof(UTC);
/* '+/-' */
if (*ptr == '-' || *ptr == '+') {
if (snmp_suboid_append(oid, (asn_subid_t) (*ptr)) < 0)
return (NULL);
} else
goto error1;
/* 'HH:' */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (*endptr != ':')
goto error1;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
/* 'MM' - last one - ignore endptr here. */
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0)
goto error;
else
errno = saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
error:
errno = saved_errno;
error1:
warnx("Date value %s not supported", str);
return (NULL);
}
/* Read a DateAndTime string eg. 1992-5-26,13:30:15.0,-4:0. */
static int32_t
parse_dateandtime(struct snmp_value *sv, char *val)
{
char *endptr;
uint32_t v;
uint8_t date[SNMP_DATETIME_OCTETS];
/* 'YYYY-' */
v = strtoul(val, &endptr, 10);
if (v > 0xffff || *endptr != '-')
goto error;
date[0] = ((v & 0xff00) >> 8);
date[1] = (v & 0xff);
val = endptr + 1;
/* 'MM-' */
v = strtoul(val, &endptr, 10);
if (v == 0 || v > 12 || *endptr != '-')
goto error;
date[2] = v;
val = endptr + 1;
/* 'DD,' */
v = strtoul(val, &endptr, 10);
if (v == 0 || v > 31 || *endptr != ',')
goto error;
date[3] = v;
val = endptr + 1;
/* 'HH:' */
v = strtoul(val, &endptr, 10);
if (v > 23 || *endptr != ':')
goto error;
date[4] = v;
val = endptr + 1;
/* 'MM:' */
v = strtoul(val, &endptr, 10);
if (v > 59 || *endptr != ':')
goto error;
date[5] = v;
val = endptr + 1;
/* 'SS.' */
v = strtoul(val, &endptr, 10);
if (v > 60 || *endptr != '.')
goto error;
date[6] = v;
val = endptr + 1;
/* '(deci-)s,' */
v = strtoul(val, &endptr, 10);
if (v > 9 || *endptr != ',')
goto error;
date[7] = v;
val = endptr + 1;
/* offset - '+/-' */
if (*val != '-' && *val != '+')
goto error;
date[8] = (uint8_t) *val;
val = endptr + 1;
/* 'HH:' - offset from UTC */
v = strtoul(val, &endptr, 10);
if (v > 13 || *endptr != ':')
goto error;
date[9] = v;
val = endptr + 1;
/* 'MM'\0'' offset from UTC */
v = strtoul(val, &endptr, 10);
if (v > 59 || *endptr != '\0')
goto error;
date[10] = v;
if ((sv->v.octetstring.octets = malloc(SNMP_DATETIME_OCTETS)) == NULL) {
warn("malloc() failed");
return (-1);
}
sv->v.octetstring.len = SNMP_DATETIME_OCTETS;
memcpy(sv->v.octetstring.octets, date, SNMP_DATETIME_OCTETS);
sv->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
error:
warnx("Date value %s not supported", val);
return (-1);
}
/**************************************************************
* PhysAddress
*/
static char *
snmp_oct2physAddr(uint32_t len, char *octets, char *buf)
{
char *ptr;
uint32_t i;
if (len != SNMP_PHYSADDR_OCTETS || octets == NULL || buf == NULL)
return (NULL);
buf[0]= '\0';
ptr = buf;
ptr += sprintf(ptr, "%2.2x", octets[0]);
for (i = 1; i < 6; i++)
ptr += sprintf(ptr, ":%2.2x", octets[i]);
return (buf);
}
static char *
snmp_addr2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr, *ptr;
uint32_t v, i;
int saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) SNMP_PHYSADDR_OCTETS) < 0)
return (NULL);
ptr = str;
for (i = 0; i < 5; i++) {
saved_errno = errno;
v = strtoul(ptr, &endptr, 16);
errno = saved_errno;
if (v > 0xff) {
warnx("Integer value %s not supported", str);
return (NULL);
}
if (*endptr != ':') {
warnx("Failed adding oid - %s", str);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
ptr = endptr + 1;
}
/* The last one - don't check the ending char here. */
saved_errno = errno;
v = strtoul(ptr, &endptr, 16);
errno = saved_errno;
if (v > 0xff) {
warnx("Integer value %s not supported", str);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
}
static int32_t
parse_physaddress(struct snmp_value *sv, char *val)
{
char *endptr;
int32_t i;
uint32_t v;
uint8_t phys_addr[SNMP_PHYSADDR_OCTETS];
for (i = 0; i < 5; i++) {
v = strtoul(val, &endptr, 16);
if (v > 0xff) {
warnx("Integer value %s not supported", val);
return (-1);
}
if(*endptr != ':') {
warnx("Failed reading octet - %s", val);
return (-1);
}
phys_addr[i] = v;
val = endptr + 1;
}
/* The last one - don't check the ending char here. */
v = strtoul(val, &endptr, 16);
if (v > 0xff) {
warnx("Integer value %s not supported", val);
return (-1);
}
phys_addr[5] = v;
if ((sv->v.octetstring.octets = malloc(SNMP_PHYSADDR_OCTETS)) == NULL) {
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
sv->v.octetstring.len = SNMP_PHYSADDR_OCTETS;
memcpy(sv->v.octetstring.octets, phys_addr, SNMP_PHYSADDR_OCTETS);
sv->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
}
/**************************************************************
* NTPTimeStamp
**************************************************************
* NTP MIB, Revision 0.2, 7/25/97:
* NTPTimeStamp ::= TEXTUAL-CONVENTION
* DISPLAY-HINT "4x.4x"
* STATUS current
* DESCRIPTION
* ""
* SYNTAX OCTET STRING (SIZE(8))
*/
static char *
snmp_oct2ntp_ts(uint32_t len, char *octets, char *buf)
{
char *ptr;
uint32_t i;
if (len != SNMP_NTP_TS_OCTETS || octets == NULL || buf == NULL)
return (NULL);
buf[0]= '\0';
ptr = buf;
i = octets[0] * 1000 + octets[1] * 100 + octets[2] * 10 + octets[3];
ptr += sprintf(ptr, "%4.4d", i);
i = octets[4] * 1000 + octets[5] * 100 + octets[6] * 10 + octets[7];
ptr += sprintf(ptr, ".%4.4d", i);
return (buf);
}
static char *
snmp_ntp_ts2asn_oid(char *str, struct asn_oid *oid)
{
char *endptr, *ptr;
uint32_t v, i, d;
struct asn_oid suboid;
int saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) SNMP_NTP_TS_OCTETS) < 0)
return (NULL);
ptr = str;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0 || (v / 1000) > 9) {
warnx("Integer value %s not supported", str);
errno = saved_errno;
return (NULL);
} else
errno = saved_errno;
if (*endptr != '.') {
warnx("Failed adding oid - %s", str);
return (NULL);
}
memset(&suboid, 0, sizeof(struct asn_oid));
suboid.len = SNMP_NTP_TS_OCTETS;
for (i = 0, d = 1000; i < 4; i++) {
suboid.subs[i] = v / d;
v = v % d;
d = d / 10;
}
ptr = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (errno != 0 || (v / 1000) > 9) {
warnx("Integer value %s not supported", str);
errno = saved_errno;
return (NULL);
} else
errno = saved_errno;
for (i = 0, d = 1000; i < 4; i++) {
suboid.subs[i + 4] = v / d;
v = v % d;
d = d / 10;
}
asn_append_oid(oid, &suboid);
return (endptr);
}
static int32_t
parse_ntp_ts(struct snmp_value *sv, char *val)
{
char *endptr;
int32_t i, d, saved_errno;
uint32_t v;
uint8_t ntp_ts[SNMP_NTP_TS_OCTETS];
saved_errno = errno;
errno = 0;
v = strtoul(val, &endptr, 10);
if (errno != 0 || (v / 1000) > 9) {
errno = saved_errno;
warnx("Integer value %s not supported", val);
return (-1);
} else
errno = saved_errno;
if (*endptr != '.') {
warnx("Failed reading octet - %s", val);
return (-1);
}
for (i = 0, d = 1000; i < 4; i++) {
ntp_ts[i] = v / d;
v = v % d;
d = d / 10;
}
val = endptr + 1;
saved_errno = errno;
errno = 0;
v = strtoul(val, &endptr, 10);
if (errno != 0 || (v / 1000) > 9) {
errno = saved_errno;
warnx("Integer value %s not supported", val);
return (-1);
} else
errno = saved_errno;
for (i = 0, d = 1000; i < 4; i++) {
ntp_ts[i + 4] = v / d;
v = v % d;
d = d / 10;
}
if ((sv->v.octetstring.octets = malloc(SNMP_NTP_TS_OCTETS)) == NULL) {
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
sv->v.octetstring.len = SNMP_NTP_TS_OCTETS;
memcpy(sv->v.octetstring.octets, ntp_ts, SNMP_NTP_TS_OCTETS);
sv->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
}
/**************************************************************
* BridgeId
**************************************************************
* BRIDGE-MIB, REVISION "200509190000Z"
* BridgeId ::= TEXTUAL-CONVENTION
* STATUS current
* DESCRIPTION
* "The Bridge-Identifier, as used in the Spanning Tree
* Protocol, to uniquely identify a bridge. Its first two
* octets (in network byte order) contain a priority value,
* and its last 6 octets contain the MAC address used to
* refer to a bridge in a unique fashion (typically, the
* numerically smallest MAC address of all ports on the
* bridge)."
* SYNTAX OCTET STRING (SIZE (8))
*/
static char *
snmp_oct2bridgeid(uint32_t len, char *octets, char *buf)
{
char *ptr;
uint32_t i, priority;
if (len != SNMP_BRIDGEID_OCTETS || octets == NULL || buf == NULL)
return (NULL);
buf[0]= '\0';
ptr = buf;
priority = octets[0] << 8;
priority += octets[1];
if (priority > SNMP_MAX_BRIDGE_PRIORITY) {
warnx("Invalid bridge priority %d", priority);
return (NULL);
} else
ptr += sprintf(ptr, "%d.", octets[0]);
ptr += sprintf(ptr, "%2.2x", octets[2]);
for (i = 1; i < 6; i++)
ptr += sprintf(ptr, ":%2.2x", octets[i + 2]);
return (buf);
}
static char *
snmp_bridgeid2oct(char *str, struct asn_oid *oid)
{
char *endptr, *ptr;
uint32_t v, i;
int32_t saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) SNMP_BRIDGEID_OCTETS) < 0)
return (NULL);
ptr = str;
/* Read the priority. */
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (v > SNMP_MAX_BRIDGE_PRIORITY || errno != 0 || *endptr != '.') {
errno = saved_errno;
warnx("Bad bridge priority value %d", v);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) (v & 0xff00)) < 0)
return (NULL);
if (snmp_suboid_append(oid, (asn_subid_t) (v & 0xff)) < 0)
return (NULL);
ptr = endptr + 1;
for (i = 0; i < 5; i++) {
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 16);
errno = saved_errno;
if (v > 0xff) {
warnx("Integer value %s not supported", str);
return (NULL);
}
if (*endptr != ':') {
warnx("Failed adding oid - %s",str);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
ptr = endptr + 1;
}
/* The last one - don't check the ending char here. */
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 16);
errno = saved_errno;
if (v > 0xff) {
warnx("Integer value %s not supported", str);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
}
static int32_t
parse_bridge_id(struct snmp_value *sv, char *string)
{
char *endptr;
int32_t i, saved_errno;
uint32_t v;
uint8_t bridge_id[SNMP_BRIDGEID_OCTETS];
/* Read the priority. */
saved_errno = errno;
errno = 0;
v = strtoul(string, &endptr, 10);
if (v > SNMP_MAX_BRIDGE_PRIORITY || errno != 0 || *endptr != '.') {
errno = saved_errno;
warnx("Bad bridge priority value %d", v);
return (-1);
}
bridge_id[0] = (v & 0xff00);
bridge_id[1] = (v & 0xff);
string = endptr + 1;
for (i = 0; i < 5; i++) {
v = strtoul(string, &endptr, 16);
if (v > 0xff) {
warnx("Integer value %s not supported", string);
return (-1);
}
if(*endptr != ':') {
warnx("Failed reading octet - %s", string);
return (-1);
}
bridge_id[i + 2] = v;
string = endptr + 1;
}
/* The last one - don't check the ending char here. */
v = strtoul(string, &endptr, 16);
if (v > 0xff) {
warnx("Integer value %s not supported", string);
return (-1);
}
bridge_id[7] = v;
if ((sv->v.octetstring.octets = malloc(SNMP_BRIDGEID_OCTETS)) == NULL) {
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
sv->v.octetstring.len = SNMP_BRIDGEID_OCTETS;
memcpy(sv->v.octetstring.octets, bridge_id, SNMP_BRIDGEID_OCTETS);
sv->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
}
/**************************************************************
* BridgePortId
**************************************************************
* BEGEMOT-BRIDGE-MIB, LAST-UPDATED "200608100000Z"
* BridgePortId ::= TEXTUAL-CONVENTION
* DISPLAY-HINT "1x.1x"
* STATUS current
* DESCRIPTION
* "A port identifier that contains a bridge port's STP priority
* in the first octet and the port number in the second octet."
* SYNTAX OCTET STRING (SIZE(2))
*/
static char *
snmp_oct2bport_id(uint32_t len, char *octets, char *buf)
{
char *ptr;
if (len != SNMP_BPORT_OCTETS || octets == NULL || buf == NULL)
return (NULL);
buf[0]= '\0';
ptr = buf;
ptr += sprintf(ptr, "%d.", octets[0]);
ptr += sprintf(ptr, "%d", octets[1]);
return (buf);
}
static char *
snmp_bport_id2oct(char *str, struct asn_oid *oid)
{
char *endptr, *ptr;
uint32_t v;
int saved_errno;
if (snmp_suboid_append(oid, (asn_subid_t) SNMP_BPORT_OCTETS) < 0)
return (NULL);
ptr = str;
/* Read the priority. */
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 10);
if (v > SNMP_MAX_BPORT_PRIORITY || errno != 0 || *endptr != '.') {
errno = saved_errno;
warnx("Bad bridge port priority value %d", v);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
saved_errno = errno;
errno = 0;
v = strtoul(ptr, &endptr, 16);
errno = saved_errno;
if (v > 0xff) {
warnx("Bad port number - %d", v);
return (NULL);
}
if (snmp_suboid_append(oid, (asn_subid_t) v) < 0)
return (NULL);
return (endptr);
}
static int32_t
parse_bport_id(struct snmp_value *value, char *string)
{
char *endptr;
int saved_errno;
uint32_t v;
uint8_t bport_id[SNMP_BPORT_OCTETS];
/* Read the priority. */
saved_errno = errno;
errno = 0;
v = strtoul(string, &endptr, 10);
if (v > SNMP_MAX_BPORT_PRIORITY || errno != 0 || *endptr != '.') {
errno = saved_errno;
warnx("Bad bridge port priority value %d", v);
return (-1);
}
bport_id[0] = v;
string = endptr + 1;
v = strtoul(string, &endptr, 16);
if (v > 0xff) {
warnx("Bad port number - %d", v);
return (-1);
}
bport_id[1] = v;
if ((value->v.octetstring.octets = malloc(SNMP_BPORT_OCTETS)) == NULL) {
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
value->v.octetstring.len = SNMP_BPORT_OCTETS;
memcpy(value->v.octetstring.octets, bport_id, SNMP_BPORT_OCTETS);
value->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
}
/**************************************************************
* InetAddress
**************************************************************
* INET-ADDRESS-MIB, REVISION "200502040000Z"
* InetAddress ::= TEXTUAL-CONVENTION
* STATUS current
* DESCRIPTION
* "Denotes a generic Internet address.
*
* An InetAddress value is always interpreted within the context
* of an InetAddressType value. Every usage of the InetAddress
* textual convention is required to specify the InetAddressType
* object that provides the context. It is suggested that the
* InetAddressType object be logically registered before the
* object(s) that use the InetAddress textual convention, if
* they appear in the same logical row.
*
* The value of an InetAddress object must always be
* consistent with the value of the associated InetAddressType
* object. Attempts to set an InetAddress object to a value
* inconsistent with the associated InetAddressType
* must fail with an inconsistentValue error.
*
* When this textual convention is used as the syntax of an
* index object, there may be issues with the limit of 128
* sub-identifiers specified in SMIv2, STD 58. In this case,
* the object definition MUST include a 'SIZE' clause to
* limit the number of potential instance sub-identifiers;
* otherwise the applicable constraints MUST be stated in
* the appropriate conceptual row DESCRIPTION clauses, or
* in the surrounding documentation if there is no single
* DESCRIPTION clause that is appropriate."
* SYNTAX OCTET STRING (SIZE (0..255))
**************************************************************
* TODO: FIXME!!! syrinx: Since we do not support checking the
* consistency of a varbinding based on the value of a previous
* one, try to guess the type of address based on the
* OctetString SIZE - 4 for IPv4, 16 for IPv6, others currently
* not supported.
*/
static char *
snmp_oct2inetaddr(uint32_t len, char *octets, char *buf)
{
int af;
void *ip;
struct in_addr ipv4;
struct in6_addr ipv6;
if (len > MAX_OCTSTRING_LEN || octets == NULL || buf == NULL)
return (NULL);
switch (len) {
/* XXX: FIXME - IPv4*/
case 4:
memcpy(&ipv4.s_addr, octets, sizeof(ipv4.s_addr));
af = AF_INET;
ip = &ipv4;
break;
/* XXX: FIXME - IPv4*/
case 16:
memcpy(ipv6.s6_addr, octets, sizeof(ipv6.s6_addr));
af = AF_INET6;
ip = &ipv6;
break;
default:
return (NULL);
}
if (inet_ntop(af, ip, buf, SNMP_INADDRS_STRSZ) == NULL) {
warn("inet_ntop failed");
return (NULL);
}
return (buf);
}
static char *
snmp_inetaddr2oct(char *str __unused, struct asn_oid *oid __unused)
{
return (NULL);
}
static int32_t
parse_inetaddr(struct snmp_value *value __unused, char *string __unused)
{
return (-1);
}
/**************************************************************
* SNMP BITS type - XXX: FIXME
**************************************************************/
static char *
snmp_oct2bits(uint32_t len, char *octets, char *buf)
{
int i, bits;
uint64_t value;
if (len > sizeof(value) || octets == NULL || buf == NULL)
return (NULL);
for (i = len, value = 0, bits = 0; i > 0; i--, bits += 8)
value += octets[i] << bits;
buf[0]= '\0';
sprintf(buf, "0x%llx.",(long long unsigned) value);
return (buf);
}
static char *
snmp_bits2oct(char *str, struct asn_oid *oid)
{
char *endptr;
int i, size, bits, saved_errno;
uint64_t v, mask = 0xFF00000000000000;
saved_errno = errno;
errno = 0;
v = strtoull(str, &endptr, 16);
if (errno != 0) {
warn("Bad BITS value %s", str);
errno = saved_errno;
return (NULL);
}
bits = 8;
/* Determine length - up to 8 octets supported so far. */
for (size = sizeof(v); size > 0; size--) {
if ((v & mask) != 0)
break;
mask = mask >> bits;
}
if (size == 0)
size = 1;
if (snmp_suboid_append(oid, (asn_subid_t) size) < 0)
return (NULL);
for (i = 0, bits = 0; i < size; i++, bits += 8)
if (snmp_suboid_append(oid,
(asn_subid_t)((v & mask) >> bits)) < 0)
return (NULL);
return (endptr);
}
static int32_t
parse_bits(struct snmp_value *value, char *string)
{
char *endptr;
int i, size, bits, saved_errno;
uint64_t v, mask = 0xFF00000000000000;
saved_errno = errno;
errno = 0;
v = strtoull(string, &endptr, 16);
if (errno != 0) {
warn("Bad BITS value %s", string);
errno = saved_errno;
return (-1);
}
bits = 8;
/* Determine length - up to 8 octets supported so far. */
for (size = sizeof(v); size > 0; size--) {
if ((v & mask) != 0)
break;
mask = mask >> bits;
}
if (size == 0)
size = 1;
if ((value->v.octetstring.octets = malloc(size)) == NULL) {
syslog(LOG_ERR, "malloc failed: %s", strerror(errno));
return (-1);
}
value->v.octetstring.len = size;
for (i = 0, bits = 0; i < size; i++, bits += 8)
value->v.octetstring.octets[i] = (v & mask) >> bits;
value->syntax = SNMP_SYNTAX_OCTETSTRING;
return (1);
}
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