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-rw-r--r--lib/snmp.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/lib/snmp.c b/lib/snmp.c
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+++ b/lib/snmp.c
@@ -0,0 +1,196 @@
+/* SNMP support
+ * Copyright (C) 1999 Kunihiro Ishiguro <kunihiro@zebra.org>
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#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;
+}