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wireshark/capture_opts.c
Guy Harris 8ed7a73e22 Fix a bunch of warnings. 
Cast away some implicit 64-bit-to-32-bit conversion errors due to use of
sizeof.

Cast away some implicit 64-bit-to-32-bit conversion errors due to use of
strtol() and strtoul().

Change some data types to avoid those implicit conversion warnings.

When assigning a constant to a float, make sure the constant isn't a
double, by appending "f" to the constant.

Constify a bunch of variables, parameters, and return values to
eliminate warnings due to strings being given const qualifiers.  Cast
away those warnings in some cases where an API we don't control forces
us to do so.

Enable a bunch of additional warnings by default.  Note why at least
some of the other warnings aren't enabled.

randpkt.c and text2pcap.c are used to build programs, so they don't need
to be in EXTRA_DIST.

If the user specifies --enable-warnings-as-errors, add -Werror *even if
the user specified --enable-extra-gcc-flags; assume they know what
they're doing and are willing to have the compile fail due to the extra
GCC warnings being treated as errors.

svn path=/trunk/; revision=46748
2012-12-26 05:57:06 +00:00

1088 lines
45 KiB
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/* capture_opts.c
* Routines for capture options setting
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#ifdef HAVE_LIBPCAP
#include <string.h>
#include <ctype.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib.h>
#include <epan/packet.h>
#include <epan/prefs.h>
#include "ui/simple_dialog.h"
#include "capture_ui_utils.h"
#include "capture_opts.h"
#include "ringbuffer.h"
#include "clopts_common.h"
#include "console_io.h"
#include "cmdarg_err.h"
#include "capture_ifinfo.h"
#include "capture-pcap-util.h"
#include <wsutil/file_util.h>
static gboolean capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe);
void
capture_opts_init(capture_options *capture_opts, void *cf)
{
capture_opts->cf = cf;
capture_opts->ifaces = g_array_new(FALSE, FALSE, sizeof(interface_options));
capture_opts->all_ifaces = g_array_new(FALSE, FALSE, sizeof(interface_t));
capture_opts->num_selected = 0;
capture_opts->default_options.name = NULL;
capture_opts->default_options.descr = NULL;
capture_opts->default_options.cfilter = NULL;
capture_opts->default_options.has_snaplen = FALSE;
capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
capture_opts->default_options.linktype = -1;
capture_opts->default_options.promisc_mode = TRUE;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
capture_opts->default_options.buffer_size = 1; /* 1 MB */
#endif
capture_opts->default_options.monitor_mode = FALSE;
#ifdef HAVE_PCAP_REMOTE
capture_opts->default_options.src_type = CAPTURE_IFLOCAL;
capture_opts->default_options.remote_host = NULL;
capture_opts->default_options.remote_port = NULL;
capture_opts->default_options.auth_type = CAPTURE_AUTH_NULL;
capture_opts->default_options.auth_username = NULL;
capture_opts->default_options.auth_password = NULL;
capture_opts->default_options.datatx_udp = FALSE;
capture_opts->default_options.nocap_rpcap = TRUE;
capture_opts->default_options.nocap_local = FALSE;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
capture_opts->default_options.sampling_method = CAPTURE_SAMP_NONE;
capture_opts->default_options.sampling_param = 0;
#endif
capture_opts->saving_to_file = FALSE;
capture_opts->save_file = NULL;
capture_opts->group_read_access = FALSE;
#ifdef PCAP_NG_DEFAULT
capture_opts->use_pcapng = TRUE; /* Save as pcap-ng by default */
#else
capture_opts->use_pcapng = FALSE; /* Save as pcap by default */
#endif
capture_opts->real_time_mode = TRUE;
capture_opts->show_info = TRUE;
capture_opts->quit_after_cap = getenv("WIRESHARK_QUIT_AFTER_CAPTURE") ? TRUE : FALSE;
capture_opts->restart = FALSE;
capture_opts->multi_files_on = FALSE;
capture_opts->has_file_duration = FALSE;
capture_opts->file_duration = 60; /* 1 min */
capture_opts->has_ring_num_files = FALSE;
capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
capture_opts->has_autostop_files = FALSE;
capture_opts->autostop_files = 1;
capture_opts->has_autostop_packets = FALSE;
capture_opts->autostop_packets = 0;
capture_opts->has_autostop_filesize = FALSE;
capture_opts->autostop_filesize = 1024; /* 1 MB */
capture_opts->has_autostop_duration = FALSE;
capture_opts->autostop_duration = 60; /* 1 min */
capture_opts->fork_child = -1; /* invalid process handle */
#ifdef _WIN32
capture_opts->signal_pipe_write_fd = -1;
#endif
capture_opts->state = CAPTURE_STOPPED;
capture_opts->output_to_pipe = FALSE;
#ifndef _WIN32
capture_opts->owner = getuid();
capture_opts->group = getgid();
#endif
}
/* log content of capture_opts */
void
capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts) {
guint i;
g_log(log_domain, log_level, "CAPTURE OPTIONS :");
g_log(log_domain, log_level, "CFile : %p", capture_opts->cf);
for (i = 0; i < capture_opts->ifaces->len; i++) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
g_log(log_domain, log_level, "Interface name[%02d] : %s", i, interface_opts.name ? interface_opts.name : "(unspecified)");
g_log(log_domain, log_level, "Interface description[%02d] : %s", i, interface_opts.descr ? interface_opts.descr : "(unspecified)");
g_log(log_domain, log_level, "Console display name[%02d]: %s", i, interface_opts.console_display_name ? interface_opts.console_display_name : "(unspecified)");
g_log(log_domain, log_level, "Capture filter[%02d] : %s", i, interface_opts.cfilter ? interface_opts.cfilter : "(unspecified)");
g_log(log_domain, log_level, "Snap length[%02d] (%u) : %d", i, interface_opts.has_snaplen, interface_opts.snaplen);
g_log(log_domain, log_level, "Link Type[%02d] : %d", i, interface_opts.linktype);
g_log(log_domain, log_level, "Promiscuous Mode[%02d]: %s", i, interface_opts.promisc_mode?"TRUE":"FALSE");
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
g_log(log_domain, log_level, "Buffer size[%02d] : %d (MB)", i, interface_opts.buffer_size);
#endif
g_log(log_domain, log_level, "Monitor Mode[%02d] : %s", i, interface_opts.monitor_mode?"TRUE":"FALSE");
#ifdef HAVE_PCAP_REMOTE
g_log(log_domain, log_level, "Capture source[%02d] : %s", i,
interface_opts.src_type == CAPTURE_IFLOCAL ? "Local interface" :
interface_opts.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
"Unknown");
if (interface_opts.src_type == CAPTURE_IFREMOTE) {
g_log(log_domain, log_level, "Remote host[%02d] : %s", i, interface_opts.remote_host ? interface_opts.remote_host : "(unspecified)");
g_log(log_domain, log_level, "Remote port[%02d] : %s", i, interface_opts.remote_port ? interface_opts.remote_port : "(unspecified)");
}
g_log(log_domain, log_level, "Authentication[%02d] : %s", i,
interface_opts.auth_type == CAPTURE_AUTH_NULL ? "Null" :
interface_opts.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
"Unknown");
if (interface_opts.auth_type == CAPTURE_AUTH_PWD) {
g_log(log_domain, log_level, "Auth username[%02d] : %s", i, interface_opts.auth_username ? interface_opts.auth_username : "(unspecified)");
g_log(log_domain, log_level, "Auth password[%02d] : <hidden>", i);
}
g_log(log_domain, log_level, "UDP data tfer[%02d] : %u", i, interface_opts.datatx_udp);
g_log(log_domain, log_level, "No cap. RPCAP[%02d] : %u", i, interface_opts.nocap_rpcap);
g_log(log_domain, log_level, "No cap. local[%02d] : %u", i, interface_opts.nocap_local);
#endif
#ifdef HAVE_PCAP_SETSAMPLING
g_log(log_domain, log_level, "Sampling meth.[%02d] : %d", i, interface_opts.sampling_method);
g_log(log_domain, log_level, "Sampling param.[%02d] : %d", i, interface_opts.sampling_param);
#endif
}
g_log(log_domain, log_level, "Interface name[df] : %s", capture_opts->default_options.name ? capture_opts->default_options.name : "(unspecified)");
g_log(log_domain, log_level, "Interface Descr[df] : %s", capture_opts->default_options.descr ? capture_opts->default_options.descr : "(unspecified)");
g_log(log_domain, log_level, "Capture filter[df] : %s", capture_opts->default_options.cfilter ? capture_opts->default_options.cfilter : "(unspecified)");
g_log(log_domain, log_level, "Snap length[df] (%u) : %d", capture_opts->default_options.has_snaplen, capture_opts->default_options.snaplen);
g_log(log_domain, log_level, "Link Type[df] : %d", capture_opts->default_options.linktype);
g_log(log_domain, log_level, "Promiscuous Mode[df]: %s", capture_opts->default_options.promisc_mode?"TRUE":"FALSE");
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
g_log(log_domain, log_level, "Buffer size[df] : %d (MB)", capture_opts->default_options.buffer_size);
#endif
g_log(log_domain, log_level, "Monitor Mode[df] : %s", capture_opts->default_options.monitor_mode?"TRUE":"FALSE");
#ifdef HAVE_PCAP_REMOTE
g_log(log_domain, log_level, "Capture source[df] : %s",
capture_opts->default_options.src_type == CAPTURE_IFLOCAL ? "Local interface" :
capture_opts->default_options.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
"Unknown");
if (capture_opts->default_options.src_type == CAPTURE_IFREMOTE) {
g_log(log_domain, log_level, "Remote host[df] : %s", capture_opts->default_options.remote_host ? capture_opts->default_options.remote_host : "(unspecified)");
g_log(log_domain, log_level, "Remote port[df] : %s", capture_opts->default_options.remote_port ? capture_opts->default_options.remote_port : "(unspecified)");
}
g_log(log_domain, log_level, "Authentication[df] : %s",
capture_opts->default_options.auth_type == CAPTURE_AUTH_NULL ? "Null" :
capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
"Unknown");
if (capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD) {
g_log(log_domain, log_level, "Auth username[df] : %s", capture_opts->default_options.auth_username ? capture_opts->default_options.auth_username : "(unspecified)");
g_log(log_domain, log_level, "Auth password[df] : <hidden>");
}
g_log(log_domain, log_level, "UDP data tfer[df] : %u", capture_opts->default_options.datatx_udp);
g_log(log_domain, log_level, "No cap. RPCAP[df] : %u", capture_opts->default_options.nocap_rpcap);
g_log(log_domain, log_level, "No cap. local[df] : %u", capture_opts->default_options.nocap_local);
#endif
#ifdef HAVE_PCAP_SETSAMPLING
g_log(log_domain, log_level, "Sampling meth. [df] : %d", capture_opts->default_options.sampling_method);
g_log(log_domain, log_level, "Sampling param.[df] : %d", capture_opts->default_options.sampling_param);
#endif
g_log(log_domain, log_level, "SavingToFile : %u", capture_opts->saving_to_file);
g_log(log_domain, log_level, "SaveFile : %s", (capture_opts->save_file) ? capture_opts->save_file : "");
g_log(log_domain, log_level, "GroupReadAccess : %u", capture_opts->group_read_access);
g_log(log_domain, log_level, "Fileformat : %s", (capture_opts->use_pcapng) ? "PCAPNG" : "PCAP");
g_log(log_domain, log_level, "RealTimeMode : %u", capture_opts->real_time_mode);
g_log(log_domain, log_level, "ShowInfo : %u", capture_opts->show_info);
g_log(log_domain, log_level, "QuitAfterCap : %u", capture_opts->quit_after_cap);
g_log(log_domain, log_level, "MultiFilesOn : %u", capture_opts->multi_files_on);
g_log(log_domain, log_level, "FileDuration (%u) : %u", capture_opts->has_file_duration, capture_opts->file_duration);
g_log(log_domain, log_level, "RingNumFiles (%u) : %u", capture_opts->has_ring_num_files, capture_opts->ring_num_files);
g_log(log_domain, log_level, "AutostopFiles (%u) : %u", capture_opts->has_autostop_files, capture_opts->autostop_files);
g_log(log_domain, log_level, "AutostopPackets (%u) : %u", capture_opts->has_autostop_packets, capture_opts->autostop_packets);
g_log(log_domain, log_level, "AutostopFilesize(%u) : %u (KB)", capture_opts->has_autostop_filesize, capture_opts->autostop_filesize);
g_log(log_domain, log_level, "AutostopDuration(%u) : %u", capture_opts->has_autostop_duration, capture_opts->autostop_duration);
g_log(log_domain, log_level, "ForkChild : %d", capture_opts->fork_child);
#ifdef _WIN32
g_log(log_domain, log_level, "SignalPipeWrite : %d", capture_opts->signal_pipe_write_fd);
#endif
}
/*
* Given a string of the form "<autostop criterion>:<value>", as might appear
* as an argument to a "-a" option, parse it and set the criterion in
* question. Return an indication of whether it succeeded or failed
* in some fashion.
*/
static gboolean
set_autostop_criterion(capture_options *capture_opts, const char *autostoparg)
{
gchar *p, *colonp;
colonp = strchr(autostoparg, ':');
if (colonp == NULL)
return FALSE;
p = colonp;
*p++ = '\0';
/*
* Skip over any white space (there probably won't be any, but
* as we allow it in the preferences file, we might as well
* allow it here).
*/
while (isspace((guchar)*p))
p++;
if (*p == '\0') {
/*
* Put the colon back, so if our caller uses, in an
* error message, the string they passed us, the message
* looks correct.
*/
*colonp = ':';
return FALSE;
}
if (strcmp(autostoparg,"duration") == 0) {
capture_opts->has_autostop_duration = TRUE;
capture_opts->autostop_duration = get_positive_int(p,"autostop duration");
} else if (strcmp(autostoparg,"filesize") == 0) {
capture_opts->has_autostop_filesize = TRUE;
capture_opts->autostop_filesize = get_positive_int(p,"autostop filesize");
} else if (strcmp(autostoparg,"files") == 0) {
capture_opts->multi_files_on = TRUE;
capture_opts->has_autostop_files = TRUE;
capture_opts->autostop_files = get_positive_int(p,"autostop files");
} else {
return FALSE;
}
*colonp = ':'; /* put the colon back */
return TRUE;
}
/*
* Given a string of the form "<ring buffer file>:<duration>", as might appear
* as an argument to a "-b" option, parse it and set the arguments in
* question. Return an indication of whether it succeeded or failed
* in some fashion.
*/
static gboolean
get_ring_arguments(capture_options *capture_opts, const char *arg)
{
gchar *p = NULL, *colonp;
colonp = strchr(arg, ':');
if (colonp == NULL)
return FALSE;
p = colonp;
*p++ = '\0';
/*
* Skip over any white space (there probably won't be any, but
* as we allow it in the preferences file, we might as well
* allow it here).
*/
while (isspace((guchar)*p))
p++;
if (*p == '\0') {
/*
* Put the colon back, so if our caller uses, in an
* error message, the string they passed us, the message
* looks correct.
*/
*colonp = ':';
return FALSE;
}
if (strcmp(arg,"files") == 0) {
capture_opts->has_ring_num_files = TRUE;
capture_opts->ring_num_files = get_positive_int(p, "number of ring buffer files");
} else if (strcmp(arg,"filesize") == 0) {
capture_opts->has_autostop_filesize = TRUE;
capture_opts->autostop_filesize = get_positive_int(p, "ring buffer filesize");
} else if (strcmp(arg,"duration") == 0) {
capture_opts->has_file_duration = TRUE;
capture_opts->file_duration = get_positive_int(p, "ring buffer duration");
}
*colonp = ':'; /* put the colon back */
return TRUE;
}
#ifdef HAVE_PCAP_SETSAMPLING
/*
* Given a string of the form "<sampling type>:<value>", as might appear
* as an argument to a "-m" option, parse it and set the arguments in
* question. Return an indication of whether it succeeded or failed
* in some fashion.
*/
static gboolean
get_sampling_arguments(capture_options *capture_opts, const char *arg)
{
gchar *p = NULL, *colonp;
colonp = strchr(arg, ':');
if (colonp == NULL)
return FALSE;
p = colonp;
*p++ = '\0';
while (isspace((guchar)*p))
p++;
if (*p == '\0') {
*colonp = ':';
return FALSE;
}
if (strcmp(arg, "count") == 0) {
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.sampling_method = CAPTURE_SAMP_BY_COUNT;
interface_opts.sampling_param = get_positive_int(p, "sampling count");
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_COUNT;
capture_opts->default_options.sampling_param = get_positive_int(p, "sampling count");
}
} else if (strcmp(arg, "timer") == 0) {
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.sampling_method = CAPTURE_SAMP_BY_TIMER;
interface_opts.sampling_param = get_positive_int(p, "sampling timer");
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_TIMER;
capture_opts->default_options.sampling_param = get_positive_int(p, "sampling timer");
}
}
*colonp = ':';
return TRUE;
}
#endif
#ifdef HAVE_PCAP_REMOTE
/*
* Given a string of the form "<username>:<password>", as might appear
* as an argument to a "-A" option, parse it and set the arguments in
* question. Return an indication of whether it succeeded or failed
* in some fashion.
*/
static gboolean
get_auth_arguments(capture_options *capture_opts, const char *arg)
{
gchar *p = NULL, *colonp;
colonp = strchr(arg, ':');
if (colonp == NULL)
return FALSE;
p = colonp;
*p++ = '\0';
while (isspace((guchar)*p))
p++;
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.auth_type = CAPTURE_AUTH_PWD;
interface_opts.auth_username = g_strdup(arg);
interface_opts.auth_password = g_strdup(p);
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.auth_type = CAPTURE_AUTH_PWD;
capture_opts->default_options.auth_username = g_strdup(arg);
capture_opts->default_options.auth_password = g_strdup(p);
}
*colonp = ':';
return TRUE;
}
#endif
static int
capture_opts_add_iface_opt(capture_options *capture_opts, const char *optarg_str_p)
{
long adapter_index;
char *p;
GList *if_list;
if_info_t *if_info;
int err;
gchar *err_str;
interface_options interface_opts;
/*
* If the argument is a number, treat it as an index into the list
* of adapters, as printed by "tshark -D".
*
* This should be OK on UNIX systems, as interfaces shouldn't have
* names that begin with digits. It can be useful on Windows, where
* more than one interface can have the same name.
*/
adapter_index = strtol(optarg_str_p, &p, 10);
if (p != NULL && *p == '\0') {
if (adapter_index < 0) {
cmdarg_err("The specified adapter index is a negative number");
return 1;
}
if (adapter_index > INT_MAX) {
cmdarg_err("The specified adapter index is too large (greater than %d)",
INT_MAX);
return 1;
}
if (adapter_index == 0) {
cmdarg_err("There is no interface with that adapter index");
return 1;
}
if_list = capture_interface_list(&err, &err_str);
if (if_list == NULL) {
switch (err) {
case CANT_GET_INTERFACE_LIST:
case DONT_HAVE_PCAP:
cmdarg_err("%s", err_str);
g_free(err_str);
break;
case NO_INTERFACES_FOUND:
cmdarg_err("There are no interfaces on which a capture can be done");
break;
}
return 2;
}
if_info = (if_info_t *)g_list_nth_data(if_list, (int)(adapter_index - 1));
if (if_info == NULL) {
cmdarg_err("There is no interface with that adapter index");
return 1;
}
interface_opts.name = g_strdup(if_info->name);
if (if_info->friendly_name != NULL) {
/*
* We have a friendly name for the interface, so display that
* instead of the interface name/guid.
*
* XXX - on UN*X, the interface name is not quite so ugly,
* and might be more familiar to users; display them both?
*/
interface_opts.console_display_name = g_strdup(if_info->friendly_name);
} else {
/* fallback to the interface name */
interface_opts.console_display_name = g_strdup(if_info->name);
}
free_interface_list(if_list);
} else {
/*
* Retrieve the interface list so that we can search for the
* specified option amongst both the interface names and the
* friendly names and so that we find the friendly name even
* if an interface name was specified.
*
* If we can't get the list, just use the specified option as
* the interface name, so that the user can try specifying an
* interface explicitly for testing purposes.
*/
if_list = capture_interface_list(&err, &err_str);
if (if_list != NULL) {
/* try and do an exact match (case insensitive) */
GList *if_entry;
gboolean matched;
matched = FALSE;
for (if_entry = g_list_first(if_list); if_entry != NULL;
if_entry = g_list_next(if_entry))
{
if_info = (if_info_t *)if_entry->data;
/* exact name check */
if (g_ascii_strcasecmp(if_info->name, optarg_str_p) == 0) {
/* exact match on the interface name, use that for displaying etc */
interface_opts.name = g_strdup(if_info->name);
if (if_info->friendly_name != NULL) {
/*
* If we have a friendly name, use that for the
* console display name, as it is the basis for
* the auto generated temp filename.
*/
interface_opts.console_display_name = g_strdup(if_info->friendly_name);
} else {
interface_opts.console_display_name = g_strdup(if_info->name);
}
matched = TRUE;
break;
}
/* exact friendly name check */
if (if_info->friendly_name != NULL &&
g_ascii_strcasecmp(if_info->friendly_name, optarg_str_p) == 0) {
/* exact match - use the friendly name for display */
interface_opts.name = g_strdup(if_info->name);
interface_opts.console_display_name = g_strdup(if_info->friendly_name);
matched = TRUE;
break;
}
}
/* didn't find, attempt a case insensitive prefix match of the friendly name*/
if (!matched) {
size_t prefix_length;
prefix_length = strlen(optarg_str_p);
for (if_entry = g_list_first(if_list); if_entry != NULL;
if_entry = g_list_next(if_entry))
{
if_info = (if_info_t *)if_entry->data;
if (if_info->friendly_name != NULL &&
g_ascii_strncasecmp(if_info->friendly_name, optarg_str_p, prefix_length) == 0) {
/* prefix match - use the friendly name for display */
interface_opts.name = g_strdup(if_info->name);
interface_opts.console_display_name = g_strdup(if_info->friendly_name);
matched = TRUE;
break;
}
}
}
if (!matched) {
/*
* We didn't find the interface in the list; just use
* the specified name, so that, for example, if an
* interface doesn't show up in the list for some
* reason, the user can try specifying it explicitly
* for testing purposes.
*/
interface_opts.name = g_strdup(optarg_str_p);
interface_opts.console_display_name = g_strdup(optarg_str_p);
}
free_interface_list(if_list);
} else {
interface_opts.name = g_strdup(optarg_str_p);
interface_opts.console_display_name = g_strdup(optarg_str_p);
}
}
/* We don't set iface_descr here because doing so requires
* capture_ui_utils.c which requires epan/prefs.c which is
* probably a bit too much dependency for here...
*/
interface_opts.descr = g_strdup(capture_opts->default_options.descr);
interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
interface_opts.snaplen = capture_opts->default_options.snaplen;
interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
interface_opts.linktype = capture_opts->default_options.linktype;
interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
interface_opts.buffer_size = capture_opts->default_options.buffer_size;
#endif
interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
#ifdef HAVE_PCAP_REMOTE
interface_opts.src_type = capture_opts->default_options.src_type;
interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
interface_opts.auth_type = capture_opts->default_options.auth_type;
interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
interface_opts.nocap_local = capture_opts->default_options.nocap_local;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
interface_opts.sampling_method = capture_opts->default_options.sampling_method;
interface_opts.sampling_param = capture_opts->default_options.sampling_param;
#endif
g_array_append_val(capture_opts->ifaces, interface_opts);
return 0;
}
int
capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
{
int status, snaplen;
switch(opt) {
case 'a': /* autostop criteria */
if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
return 1;
}
break;
#ifdef HAVE_PCAP_REMOTE
case 'A':
if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'b': /* Ringbuffer option */
capture_opts->multi_files_on = TRUE;
if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
return 1;
}
break;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
case 'B': /* Buffer size */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.buffer_size = get_positive_int(optarg_str_p, "buffer size");
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.buffer_size = get_positive_int(optarg_str_p, "buffer size");
}
break;
#endif
case 'c': /* Capture n packets */
capture_opts->has_autostop_packets = TRUE;
capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
break;
case 'f': /* capture filter */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
g_free(interface_opts.cfilter);
interface_opts.cfilter = g_strdup(optarg_str_p);
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
g_free(capture_opts->default_options.cfilter);
capture_opts->default_options.cfilter = g_strdup(optarg_str_p);
}
break;
case 'g': /* enable group read access on the capture file(s) */
capture_opts->group_read_access = TRUE;
break;
case 'H': /* Hide capture info dialog box */
capture_opts->show_info = FALSE;
break;
case 'i': /* Use interface x */
status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
if (status != 0) {
return status;
}
break;
#ifdef HAVE_PCAP_CREATE
case 'I': /* Capture in monitor mode */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.monitor_mode = TRUE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.monitor_mode = TRUE;
}
break;
#endif
case 'k': /* Start capture immediately */
*start_capture = TRUE;
break;
/*case 'l':*/ /* Automatic scrolling in live capture mode */
#ifdef HAVE_PCAP_SETSAMPLING
case 'm':
if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
return 1;
}
break;
#endif
case 'n': /* Use pcapng format */
capture_opts->use_pcapng = TRUE;
break;
case 'p': /* Don't capture in promiscuous mode */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.promisc_mode = FALSE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.promisc_mode = FALSE;
}
break;
case 'P': /* Use pcap format */
capture_opts->use_pcapng = FALSE;
break;
#ifdef HAVE_PCAP_REMOTE
case 'r':
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.nocap_rpcap = FALSE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.nocap_rpcap = FALSE;
}
break;
#endif
case 's': /* Set the snapshot (capture) length */
snaplen = get_natural_int(optarg_str_p, "snapshot length");
/*
* Make a snapshot length of 0 equivalent to the maximum packet
* length, mirroring what tcpdump does.
*/
if (snaplen == 0)
snaplen = WTAP_MAX_PACKET_SIZE;
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.has_snaplen = TRUE;
interface_opts.snaplen = snaplen;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.snaplen = snaplen;
capture_opts->default_options.has_snaplen = TRUE;
}
break;
case 'S': /* "Real-Time" mode: used for following file ala tail -f */
capture_opts->real_time_mode = TRUE;
break;
#ifdef HAVE_PCAP_REMOTE
case 'u':
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.datatx_udp = TRUE;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.datatx_udp = TRUE;
}
break;
#endif
case 'w': /* Write to capture file x */
capture_opts->saving_to_file = TRUE;
g_free(capture_opts->save_file);
capture_opts->save_file = g_strdup(optarg_str_p);
status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
return status;
case 'y': /* Set the pcap data link type */
if (capture_opts->ifaces->len > 0) {
interface_options interface_opts;
interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
interface_opts.linktype = linktype_name_to_val(optarg_str_p);
if (interface_opts.linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
if (capture_opts->default_options.linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
}
break;
default:
/* the caller is responsible to send us only the right opt's */
g_assert_not_reached();
}
return 0;
}
void
capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name,
gboolean monitor_mode)
{
GList *lt_entry;
data_link_info_t *data_link_info;
if (caps->can_set_rfmon)
fprintf_stderr("Data link types of interface %s when %sin monitor mode (use option -y to set):\n",
name, monitor_mode ? "" : "not ");
else
fprintf_stderr("Data link types of interface %s (use option -y to set):\n", name);
for (lt_entry = caps->data_link_types; lt_entry != NULL;
lt_entry = g_list_next(lt_entry)) {
data_link_info = (data_link_info_t *)lt_entry->data;
fprintf_stderr(" %s", data_link_info->name);
if (data_link_info->description != NULL)
fprintf_stderr(" (%s)", data_link_info->description);
else
fprintf_stderr(" (not supported)");
fprintf_stderr("\n");
}
}
/* Print an ASCII-formatted list of interfaces. */
void
capture_opts_print_interfaces(GList *if_list)
{
int i;
GList *if_entry;
if_info_t *if_info;
i = 1; /* Interface id number */
for (if_entry = g_list_first(if_list); if_entry != NULL;
if_entry = g_list_next(if_entry)) {
if_info = (if_info_t *)if_entry->data;
fprintf_stderr("%d. %s", i++, if_info->name);
/* Print the interface friendly name, if it exists;
if not fall back to vendor description, if it exists. */
if (if_info->friendly_name != NULL){
fprintf_stderr(" (%s)", if_info->friendly_name);
} else {
if (if_info->vendor_description != NULL)
fprintf_stderr(" (%s)", if_info->vendor_description);
}
fprintf_stderr("\n");
}
}
void
capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min)
{
guint i;
interface_options interface_opts;
if (capture_opts->ifaces->len > 0) {
for (i = 0; i < capture_opts->ifaces->len; i++) {
interface_opts = g_array_index(capture_opts->ifaces, interface_options, 0);
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, 0);
if (interface_opts.snaplen < 1)
interface_opts.snaplen = WTAP_MAX_PACKET_SIZE;
else if (interface_opts.snaplen < snaplen_min)
interface_opts.snaplen = snaplen_min;
g_array_append_val(capture_opts->ifaces, interface_opts);
}
} else {
if (capture_opts->default_options.snaplen < 1)
capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
else if (capture_opts->default_options.snaplen < snaplen_min)
capture_opts->default_options.snaplen = snaplen_min;
}
}
void
capture_opts_trim_ring_num_files(capture_options *capture_opts)
{
/* Check the value range of the ring_num_files parameter */
if (capture_opts->ring_num_files > RINGBUFFER_MAX_NUM_FILES) {
cmdarg_err("Too many ring buffer files (%u). Reducing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MAX_NUM_FILES);
capture_opts->ring_num_files = RINGBUFFER_MAX_NUM_FILES;
} else if (capture_opts->ring_num_files > RINGBUFFER_WARN_NUM_FILES) {
cmdarg_err("%u is a lot of ring buffer files.\n", capture_opts->ring_num_files);
}
#if RINGBUFFER_MIN_NUM_FILES > 0
else if (capture_opts->ring_num_files < RINGBUFFER_MIN_NUM_FILES)
cmdarg_err("Too few ring buffer files (%u). Increasing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MIN_NUM_FILES);
capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
#endif
}
int
capture_opts_trim_iface(capture_options *capture_opts, const char *capture_device)
{
int status;
/* Did the user specify an interface to use? */
if (capture_opts->num_selected != 0 || capture_opts->ifaces->len != 0) {
/* yes they did, return immediately - nothing further to do here */
return 0;
}
/* No - is a default specified in the preferences file? */
if (capture_device != NULL) {
/* Yes - use it. */
status = capture_opts_add_iface_opt(capture_opts, capture_device);
return status;
}
/* No default in preferences file, just pick the first interface from the list of interfaces. */
return capture_opts_add_iface_opt(capture_opts, "1");
}
#ifndef S_IFIFO
#define S_IFIFO _S_IFIFO
#endif
#ifndef S_ISFIFO
#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
#endif
/* copied from filesystem.c */
static int
capture_opts_test_for_fifo(const char *path)
{
ws_statb64 statb;
if (ws_stat64(path, &statb) < 0)
return errno;
if (S_ISFIFO(statb.st_mode))
return ESPIPE;
else
return 0;
}
static gboolean
capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe)
{
int err;
*is_pipe = FALSE;
if (save_file != NULL) {
/* We're writing to a capture file. */
if (strcmp(save_file, "-") == 0) {
/* Writing to stdout. */
/* XXX - should we check whether it's a pipe? It's arguably
silly to do "-w - >output_file" rather than "-w output_file",
but by not checking we might be violating the Principle Of
Least Astonishment. */
*is_pipe = TRUE;
} else {
/* not writing to stdout, test for a FIFO (aka named pipe) */
err = capture_opts_test_for_fifo(save_file);
switch (err) {
case ENOENT: /* it doesn't exist, so we'll be creating it,
and it won't be a FIFO */
case 0: /* found it, but it's not a FIFO */
break;
case ESPIPE: /* it is a FIFO */
*is_pipe = TRUE;
break;
default: /* couldn't stat it */
break; /* ignore: later attempt to open */
/* will generate a nice msg */
}
}
}
return 0;
}
/*
* Add all non-hidden selected interfaces in the "all interfaces" list
* to the list of interfaces for the capture.
*/
void
collect_ifaces(capture_options *capture_opts)
{
guint i;
interface_t device;
interface_options interface_opts;
/* Empty out the existing list of interfaces. */
for (i = capture_opts->ifaces->len; i != 0; i--) {
interface_opts = g_array_index(capture_opts->ifaces, interface_options, i - 1);
g_free(interface_opts.name);
g_free(interface_opts.descr);
if (interface_opts.console_display_name != NULL)
g_free(interface_opts.console_display_name);
g_free(interface_opts.cfilter);
#ifdef HAVE_PCAP_REMOTE
if (interface_opts.src_type == CAPTURE_IFREMOTE) {
g_free(interface_opts.remote_host);
g_free(interface_opts.remote_port);
g_free(interface_opts.auth_username);
g_free(interface_opts.auth_password);
}
#endif
capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i - 1);
}
/* Now fill the list up again. */
for (i = 0; i < capture_opts->all_ifaces->len; i++) {
device = g_array_index(capture_opts->all_ifaces, interface_t, i);
if (!device.hidden && device.selected) {
interface_opts.name = g_strdup(device.name);
interface_opts.descr = g_strdup(device.display_name);
interface_opts.console_display_name = g_strdup(device.name);
interface_opts.linktype = device.active_dlt;
interface_opts.cfilter = g_strdup(device.cfilter);
interface_opts.snaplen = device.snaplen;
interface_opts.has_snaplen = device.has_snaplen;
interface_opts.promisc_mode = device.pmode;
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
interface_opts.buffer_size = device.buffer;
#endif
#ifdef HAVE_PCAP_CREATE
interface_opts.monitor_mode = device.monitor_mode_enabled;
#endif
#ifdef HAVE_PCAP_REMOTE
interface_opts.src_type = CAPTURE_IFREMOTE;
interface_opts.remote_host = g_strdup(device.remote_opts.remote_host_opts.remote_host);
interface_opts.remote_port = g_strdup(device.remote_opts.remote_host_opts.remote_port);
interface_opts.auth_type = device.remote_opts.remote_host_opts.auth_type;
interface_opts.auth_username = g_strdup(device.remote_opts.remote_host_opts.auth_username);
interface_opts.auth_password = g_strdup(device.remote_opts.remote_host_opts.auth_password);
interface_opts.datatx_udp = device.remote_opts.remote_host_opts.datatx_udp;
interface_opts.nocap_rpcap = device.remote_opts.remote_host_opts.nocap_rpcap;
interface_opts.nocap_local = device.remote_opts.remote_host_opts.nocap_local;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
interface_opts.sampling_method = device.remote_opts.sampling_method;
interface_opts.sampling_param = device.remote_opts.sampling_param;
#endif
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
continue;
}
}
}
#endif /* HAVE_LIBPCAP */
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