mirror of
https://github.com/the-tcpdump-group/tcpdump.git
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147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
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* Copyright (c) 1988-1997
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* The Regents of the University of California. All rights reserved.
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*
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* Copyright (c) 1998-2012 Michael Richardson <mcr@tcpdump.org>
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* The TCPDUMP project
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <netdissect-stdinc.h>
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#include "netdissect.h"
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#include <string.h>
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#include <stdio.h>
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#ifdef USE_LIBSMI
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#include <smi.h>
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#endif
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/*
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* Initialize anything that must be initialized before dissecting
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* packets.
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*
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* This should be called at the beginning of the program; it does
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* not need to be called, and should not be called, for every
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* netdissect_options structure.
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*/
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int
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nd_init(char *errbuf, size_t errbuf_size)
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{
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#ifdef _WIN32
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WORD wVersionRequested;
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WSADATA wsaData;
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int err;
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/*
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* Request Winsock 2.2; we expect Winsock 2.
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*/
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wVersionRequested = MAKEWORD(2, 2);
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err = WSAStartup(wVersionRequested, &wsaData);
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if (err != 0) {
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strlcpy(errbuf, "Attempting to initialize Winsock failed",
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errbuf_size);
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return (-1);
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}
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#endif /* _WIN32 */
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#ifdef USE_LIBSMI
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/*
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* XXX - should we just fail if this fails? Some of the
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* libsmi calls may fail.
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*/
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smiInit("tcpdump");
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#endif
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/*
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* Clears the error buffer, and uses it so we don't get
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* "unused argument" warnings at compile time.
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*/
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strlcpy(errbuf, "", errbuf_size);
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return (0);
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}
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/*
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* Clean up anything that ndo_init() did.
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*/
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void
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nd_cleanup(void)
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{
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#ifdef USE_LIBSMI
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/*
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* This appears, in libsmi 0.4.8, to do nothing if smiInit()
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* wasn't done or failed, so we call it unconditionally.
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*/
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smiExit();
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#endif
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#ifdef _WIN32
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/*
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* Undo the WSAStartup() call above.
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*/
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WSACleanup();
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#endif
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}
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int
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nd_have_smi_support(void)
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{
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#ifdef USE_LIBSMI
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return (1);
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#else
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return (0);
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#endif
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}
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/*
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* Indicates whether an SMI module has been loaded, so that we can use
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* libsmi to translate OIDs.
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*/
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int nd_smi_module_loaded;
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int
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nd_load_smi_module(const char *module, char *errbuf, size_t errbuf_size)
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{
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#ifdef USE_LIBSMI
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if (smiLoadModule(module) == 0) {
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snprintf(errbuf, errbuf_size, "could not load MIB module %s",
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module);
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return (-1);
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}
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nd_smi_module_loaded = 1;
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return (0);
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#else
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snprintf(errbuf, errbuf_size, "MIB module %s not loaded: no libsmi support",
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module);
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return (-1);
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#endif
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}
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const char *
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nd_smi_version_string(void)
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{
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#ifdef USE_LIBSMI
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return (smi_version_string);
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#else
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return (NULL);
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#endif
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}
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