forked from osmocom/wireshark
132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/* capture-pcap-util.h
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* Utility definitions for packet capture
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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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 __PCAP_UTIL_H__
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#define __PCAP_UTIL_H__
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#ifdef HAVE_LIBPCAP
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#include <epan/address.h>
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#include <pcap.h>
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/*
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* XXX - this is also the traditional default snapshot size in
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* tcpdump - but, if IPv6 is enabled, it defaults to 96, to get an
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* IPv6 header + TCP + 22 extra bytes.
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*
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* Some libpcap versions for particular capture devices might happen
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* to impose a minimum, but it's not always 68.
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*/
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#define MIN_PACKET_SIZE 68 /* minimum amount of packet data we can read */
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/*
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* The list of interfaces returned by "get_interface_list()" is
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* a list of these structures.
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*/
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typedef struct {
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char *name; /* e.g. "eth0" */
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char *description; /* from OS, e.g. "Local Area Connection" or NULL */
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GSList *ip_addr; /* containing address values of if_addr_t */
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gboolean loopback; /* TRUE if loopback, FALSE otherwise */
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} if_info_t;
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/*
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* An address in the "ip_addr" list.
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*/
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typedef struct {
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address_type type; /* AT_IPv4 or AT_IPv6 */
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union {
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guint32 ip4_addr; /* 4 byte IP V4 address, or */
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guint8 ip6_addr[16];/* 16 byte IP V6 address */
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} ip_addr;
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} if_addr_t;
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GList *get_interface_list(int *err, char **err_str);
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#ifdef HAVE_PCAP_REMOTE
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GList *get_remote_interface_list(const char *hostname, const char *port,
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int auth_type, const char *username,
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const char *passwd, int *err, char **err_str);
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#endif
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/* Error values from "get_interface_list()/capture_interface_list()". */
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#define CANT_GET_INTERFACE_LIST 1 /* error getting list */
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#define NO_INTERFACES_FOUND 2 /* list is empty */
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#define CANT_RUN_DUMPCAP 3 /* problem running dumpcap */
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void free_interface_list(GList *if_list);
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/*
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* The list of data link types returned by "get_pcap_linktype_list()" is
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* a list of these structures.
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*/
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typedef struct {
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int dlt; /* e.g. DLT_EN10MB (which is 1) */
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char *name; /* e.g. "EN10MB" or "DLT 1" */
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char *description; /* descriptive name from wiretap e.g. "Ethernet", NULL if unknown */
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} data_link_info_t;
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GList *get_pcap_linktype_list(char *devname, char **err_str);
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void free_pcap_linktype_list(GList *linktype_list);
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/* get/set the link type of an interface */
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/* (only used in capture_loop.c / capture-pcap-util.c) */
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int get_pcap_linktype(pcap_t *pch, const char *devname);
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const char *set_pcap_linktype(pcap_t *pch, char *devname, int dlt);
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#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
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const char *linktype_val_to_name(int dlt);
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#endif
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#ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
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int linktype_name_to_val(const char *linktype);
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#endif
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* HAVE_LIBPCAP */
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/*
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* Append to a GString an indication of the version of libpcap/WinPcap
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* with which we were compiled, if we were, or an indication that we
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* weren't compiled with libpcap/WinPcap, if we weren't.
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*/
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extern void get_compiled_pcap_version(GString *str);
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/*
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* Append to a GString an indication of the version of libpcap/WinPcap
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* with which we're running, or an indication that we're not running
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* with libpcap/WinPcap, if we were compiled with libpcap/WinPcap,
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* or nothing, if we weren't compiled with libpcap/WinPcap.
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*/
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extern void get_runtime_pcap_version(GString *str);
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#endif /* __PCAP_UTIL_H__ */
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