1998-09-16 02:39:15 +00:00
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/* resolv.h
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* Definitions for network object lookup
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*
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Have "get_host_ipaddr()" return a Boolean indicating whether it
succeeded or failed, and, if it succeeded, have it fill in the IP
address if found through a pointer passed as the second argument.
Have it first try interpreting its first argument as a dotted-quad IP
address, with "inet_aton()", and, if that fails, have it try to
interpret it as a host name with "gethostbyname()"; don't bother with
"gethostbyaddr()", as we should be allowed to filter on IP addresses
even if there's no host name associated with them (there's no guarantee
that "gethostbyaddr()" will succeed if handed an IP address with no
corresponding name - and it looks as if FreeBSD 3.2, at least, may not
succeed in that case).
Add a "dfilter_fail()" routine that takes "printf()"-like arguments and
uses them to set an error message for the parse; doing so means that
even if the filter expression is syntactically valid, we treat it as
being invalid. (Is there a better way to force a parse to fail from
arbitrary places in routines called by the parser?)
Use that routine in the lexical analyzer.
If that error message was set, use it as is as the failure message,
rather than adding "Unable to parse filter string XXX" to it.
Have the code to handle IP addresses and host names in display filters
check whether "get_host_ipaddr()" succeeded or failed and, if it failed,
arrange that the parse fail with an error message indicating the source
of the problem.
svn path=/trunk/; revision=802
1999-10-11 03:03:12 +00:00
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* $Id: resolv.h,v 1.7 1999/10/11 03:03:12 guy Exp $
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1998-09-16 03:22:19 +00:00
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*
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1998-09-16 02:39:15 +00:00
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* Laurent Deniel <deniel@worldnet.fr>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __RESOLV_H__
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#define __RESOLV_H__
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1998-09-25 23:24:07 +00:00
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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1998-09-16 02:39:15 +00:00
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1998-09-25 23:24:07 +00:00
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#define EPATH_ETHERS "/etc/ethers"
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#define EPATH_MANUF DATAFILE_DIR "/manuf"
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#define EPATH_PERSONAL_ETHERS ".ethereal/ethers" /* with "$HOME/" prefix */
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/* global variables */
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extern gchar *g_ethers_path;
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extern gchar *g_manuf_path;
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extern gchar *g_pethers_path;
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1998-09-16 02:39:15 +00:00
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/* Functions in resolv.c */
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1998-09-25 23:24:07 +00:00
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/* get_tcp_port returns the UDP port name or "%d" if not found */
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1998-09-16 02:39:15 +00:00
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extern u_char *get_udp_port(u_int port);
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1998-09-25 23:24:07 +00:00
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/* get_tcp_port returns the TCP port name or "%d" if not found */
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1998-09-16 02:39:15 +00:00
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extern u_char *get_tcp_port(u_int port);
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1998-09-25 23:24:07 +00:00
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/* get_hostname returns the host name or "%d.%d.%d.%d" if not found */
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1998-09-16 02:39:15 +00:00
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extern u_char *get_hostname(u_int addr);
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1999-03-28 18:32:03 +00:00
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/* get_hostname returns the host name, or numeric addr if not found */
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struct e_in6_addr;
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gchar* get_hostname6(struct e_in6_addr *ad);
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1998-09-25 23:24:07 +00:00
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/* get_ether_name returns the logical name if found in ethers files else
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"<vendor>_%02x:%02x:%02x" if the vendor code is known else
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"%02x:%02x:%02x:%02x:%02x:%02x" */
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extern u_char *get_ether_name(u_char *addr);
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/* get_manuf_name returns the vendor name or "%02x:%02x:%02x" if not known */
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extern u_char *get_manuf_name(u_char *addr);
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/* returns the ethernet address corresponding to name or NULL if not known */
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extern u_char *get_ether_addr(u_char *name);
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/* adds a hostname/IP in the hash table */
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extern void add_host_name(u_int addr, u_char *name);
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Have "get_host_ipaddr()" return a Boolean indicating whether it
succeeded or failed, and, if it succeeded, have it fill in the IP
address if found through a pointer passed as the second argument.
Have it first try interpreting its first argument as a dotted-quad IP
address, with "inet_aton()", and, if that fails, have it try to
interpret it as a host name with "gethostbyname()"; don't bother with
"gethostbyaddr()", as we should be allowed to filter on IP addresses
even if there's no host name associated with them (there's no guarantee
that "gethostbyaddr()" will succeed if handed an IP address with no
corresponding name - and it looks as if FreeBSD 3.2, at least, may not
succeed in that case).
Add a "dfilter_fail()" routine that takes "printf()"-like arguments and
uses them to set an error message for the parse; doing so means that
even if the filter expression is syntactically valid, we treat it as
being invalid. (Is there a better way to force a parse to fail from
arbitrary places in routines called by the parser?)
Use that routine in the lexical analyzer.
If that error message was set, use it as is as the failure message,
rather than adding "Unable to parse filter string XXX" to it.
Have the code to handle IP addresses and host names in display filters
check whether "get_host_ipaddr()" succeeded or failed and, if it failed,
arrange that the parse fail with an error message indicating the source
of the problem.
svn path=/trunk/; revision=802
1999-10-11 03:03:12 +00:00
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/* Translates a string representing the hostname or dotted-decimal IP address
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* into a numeric IP address value, returning TRUE if it succeeds and
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* FALSE if it fails. */
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gboolean get_host_ipaddr(const char *host, guint32 *addrp);
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1999-07-07 22:52:57 +00:00
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1998-09-16 02:39:15 +00:00
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#endif /* __RESOLV_H__ */
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