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// SPDX-License-Identifier: GPL-2.0-or-later
/* SNMP support
* Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
*/
#include <zebra.h>
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include "smux.h"
int oid_compare(const oid *o1, int o1_len, const oid *o2, int o2_len)
{
int i;
for (i = 0; i < MIN(o1_len, o2_len); i++) {
if (o1[i] < o2[i])
return -1;
else if (o1[i] > o2[i])
return 1;
}
if (o1_len < o2_len)
return -1;
if (o1_len > o2_len)
return 1;
return 0;
}
void *oid_copy(void *dest, const void *src, size_t size)
{
return memcpy(dest, src, size * sizeof(oid));
}
void oid2in_addr(oid oid[], int len, struct in_addr *addr)
{
int i;
uint8_t *pnt;
if (len == 0)
return;
pnt = (uint8_t *)addr;
for (i = 0; i < len; i++)
*pnt++ = oid[i];
}
void oid2in6_addr(oid oid[], struct in6_addr *addr)
{
unsigned int i;
uint8_t *pnt;
pnt = (uint8_t *)addr;
for (i = 0; i < sizeof(struct in6_addr); i++)
*pnt++ = oid[i];
}
void oid2int(oid oid[], int *dest)
{
uint8_t i;
uint8_t *pnt;
int network_dest;
pnt = (uint8_t *)&network_dest;
for (i = 0; i < sizeof(int); i++)
*pnt++ = oid[i];
*dest = ntohl(network_dest);
}
void oid_copy_in_addr(oid oid[], const struct in_addr *addr)
{
int i;
const uint8_t *pnt;
int len = sizeof(struct in_addr);
pnt = (uint8_t *)addr;
for (i = 0; i < len; i++)
oid[i] = *pnt++;
}
void oid_copy_in6_addr(oid oid[], const struct in6_addr *addr)
{
int i;
const uint8_t *pnt;
int len = sizeof(struct in6_addr);
pnt = (uint8_t *)addr;
for (i = 0; i < len; i++)
oid[i] = *pnt++;
}
void oid_copy_int(oid oid[], int *val)
{
uint8_t i;
const uint8_t *pnt;
int network_val;
network_val = htonl(*val);
pnt = (uint8_t *)&network_val;
for (i = 0; i < sizeof(int); i++)
oid[i] = *pnt++;
}
void oid2string(oid oid[], int len, char *string)
{
int i;
uint8_t *pnt;
if (len == 0)
return;
pnt = (uint8_t *)string;
for (i = 0; i < len; i++)
*pnt++ = (uint8_t)oid[i];
}
void oid_copy_str(oid oid[], const char *string, int len)
{
int i;
const uint8_t *pnt;
if (len == 0)
return;
pnt = (uint8_t *)string;
for (i = 0; i < len; i++)
oid[i] = *pnt++;
}
int smux_header_generic(struct variable *v, oid *name, size_t *length,
int exact, size_t *var_len, WriteMethod **write_method)
{
oid fulloid[MAX_OID_LEN];
int ret;
oid_copy(fulloid, v->name, v->namelen);
fulloid[v->namelen] = 0;
/* Check against full instance. */
ret = oid_compare(name, *length, fulloid, v->namelen + 1);
/* Check single instance. */
if ((exact && (ret != 0)) || (!exact && (ret >= 0)))
return MATCH_FAILED;
/* In case of getnext, fill in full instance. */
memcpy(name, fulloid, (v->namelen + 1) * sizeof(oid));
*length = v->namelen + 1;
*write_method = 0;
*var_len = sizeof(long); /* default to 'long' results */
return MATCH_SUCCEEDED;
}
int smux_header_table(struct variable *v, oid *name, size_t *length, int exact,
size_t *var_len, WriteMethod **write_method)
{
/* If the requested OID name is less than OID prefix we
handle, adjust it to our prefix. */
if ((oid_compare(name, *length, v->name, v->namelen)) < 0) {
if (exact)
return MATCH_FAILED;
oid_copy(name, v->name, v->namelen);
*length = v->namelen;
}
*write_method = 0;
*var_len = sizeof(long);
return MATCH_SUCCEEDED;
}
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