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Diffstat (limited to '')
| -rw-r--r-- | lib/snmp.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/lib/snmp.c b/lib/snmp.c new file mode 100644 index 0000000..8d8b3c9 --- /dev/null +++ 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; +} |