From 3a4c96885ec878ae4631b0fb7bb7839578725976 Mon Sep 17 00:00:00 2001 From: Vincent Bernat Date: Wed, 23 May 2012 00:52:46 +0200 Subject: smux: isolate SMUX implementation from SNMP implementation lib/snmp.c gets OID related helper functions that can be used with another SNMP interface. smux.h is cleaned of SMUX specific bits to only expose functions that may be used by an alternative implementation. We also do not redefine functions already present in NetSNMP. Just use the appropriate headers. --- lib/snmp.c | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 lib/snmp.c (limited to 'lib/snmp.c') diff --git a/lib/snmp.c b/lib/snmp.c new file mode 100644 index 00000000..d7b1d953 --- /dev/null +++ b/lib/snmp.c @@ -0,0 +1,113 @@ +/* SNMP support + * Copyright (C) 1999 Kunihiro Ishiguro + * + * 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 GNU Zebra; see the file COPYING. If not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ + +#include + +#ifdef HAVE_SNMP +#include +#include + +#include "smux.h" + +#define min(A,B) ((A) < (B) ? (A) : (B)) + +int +oid_compare (oid *o1, int o1_len, 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; + u_char *pnt; + + if (len == 0) + return; + + pnt = (u_char *) addr; + + for (i = 0; i < len; i++) + *pnt++ = oid[i]; +} + +void +oid_copy_addr (oid oid[], struct in_addr *addr, int len) +{ + int i; + u_char *pnt; + + if (len == 0) + return; + + pnt = (u_char *) addr; + + 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; +} +#endif /* HAVE_SNMP */ -- cgit v1.2.1