forked from osmocom/wireshark
cc22748169
as an argument, and, on an error, if they have an error message, have them set that "gchar *" to point to a g_malloc()ed string containing the error message, rather than taking a pointer to a buffer for that message as an argument. That's more like what's done in Wiretap, and doesn't impose an upper limit on the lengths of those error messages. If that pointer is null, don't allocate the message string and return it. Have that error message already have the "cant_get" processing applied to it, so nobody other than those routines need to call the "cant_get" routines to process the error messages. Have get_airpcap_interface_list() explicitly set "*err" to the appropriate error code. Clean up indentation. svn path=/trunk/; revision=20521
126 lines
3.8 KiB
C
126 lines
3.8 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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/* Error values from "get_interface_list()". */
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#define CANT_GET_INTERFACE_LIST 0 /* error getting list */
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#define NO_INTERFACES_FOUND 1 /* list is empty */
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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(const 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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