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capture_opts.c
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#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 "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->cfilter = g_strdup(""); /* No capture filter string specified */
capture_opts->iface = NULL; /* Default is "pick the first interface" */
capture_opts->iface_descr = NULL;
capture_opts->ifaces = g_array_new(FALSE, FALSE, sizeof(interface_options));
capture_opts->default_options.name = NULL;
capture_opts->default_options.descr = NULL;
capture_opts->default_options.cfilter = g_strdup("");
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
#ifdef HAVE_PCAP_REMOTE
capture_opts->src_type = CAPTURE_IFLOCAL;
capture_opts->remote_host = NULL;
capture_opts->remote_port = NULL;
capture_opts->auth_type = CAPTURE_AUTH_NULL;
capture_opts->auth_username = NULL;
capture_opts->auth_password = NULL;
capture_opts->datatx_udp = FALSE;
capture_opts->nocap_rpcap = TRUE;
capture_opts->nocap_local = FALSE;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
capture_opts->sampling_method = CAPTURE_SAMP_NONE;
capture_opts->sampling_param = 0;
#endif
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
capture_opts->buffer_size = 1; /* 1 MB */
#endif
capture_opts->has_snaplen = FALSE;
capture_opts->snaplen = WTAP_MAX_PACKET_SIZE; /* snapshot length - default is
infinite, in effect */
capture_opts->promisc_mode = TRUE; /* promiscuous mode is the default */
capture_opts->monitor_mode = FALSE;
capture_opts->linktype = -1; /* the default linktype */
capture_opts->saving_to_file = FALSE;
capture_opts->save_file = NULL;
capture_opts->group_read_access = FALSE;
capture_opts->use_pcapng = FALSE; /* the default is pcap */
capture_opts->real_time_mode = TRUE;
capture_opts->show_info = TRUE;
capture_opts->quit_after_cap = 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);
g_log(log_domain, log_level, "Filter : %s", capture_opts->cfilter);
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);
g_log(log_domain, log_level, "Interface Descr[%02d]: %s", i, interface_opts.descr);
g_log(log_domain, log_level, "Capture filter[%02d] : %s", i, interface_opts.cfilter);
g_log(log_domain, log_level, "Snap length[%02d] : %d", i, interface_opts.snaplen);
g_log(log_domain, log_level, "Link Type[%02d] : %d", i, interface_opts.linktype);
g_log(log_domain, log_level, "Promiscous 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);
g_log(log_domain, log_level, "Remote port[%02d] : %s", i, interface_opts.remote_port);
}
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_password);
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);
g_log(log_domain, log_level, "Interface Descr[df]: %s", capture_opts->default_options.descr);
g_log(log_domain, log_level, "Capture filter[df] : %s", capture_opts->default_options.cfilter);
g_log(log_domain, log_level, "Snap length[df] : %d", 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, "Promiscous 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);
g_log(log_domain, log_level, "Remote port[df] : %s", capture_opts->default_options.remote_port);
}
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_password);
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
#ifdef HAVE_PCAP_REMOTE
g_log(log_domain, log_level, "Capture source : %s",
capture_opts->src_type == CAPTURE_IFLOCAL ? "Local interface" :
capture_opts->src_type == CAPTURE_IFREMOTE ? "Remote interface" :
"Unknown");
if (capture_opts->src_type == CAPTURE_IFREMOTE) {
g_log(log_domain, log_level, "Remote host : %s", capture_opts->remote_host);
g_log(log_domain, log_level, "Remote port : %s", capture_opts->remote_port);
}
g_log(log_domain, log_level, "Authentication : %s",
capture_opts->auth_type == CAPTURE_AUTH_NULL ? "Null" :
capture_opts->auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
"Unknown");
if (capture_opts->auth_type == CAPTURE_AUTH_PWD) {
g_log(log_domain, log_level, "Auth username : %s", capture_opts->auth_password);
g_log(log_domain, log_level, "Auth password : <hidden>");
}
g_log(log_domain, log_level, "UDP data transfer : %u", capture_opts->datatx_udp);
g_log(log_domain, log_level, "No capture RPCAP : %u", capture_opts->nocap_rpcap);
g_log(log_domain, log_level, "No capture local : %u", capture_opts->nocap_local);
#endif
#ifdef HAVE_PCAP_SETSAMPLING
g_log(log_domain, log_level, "Sampling meth. : %d", capture_opts->sampling_method);
g_log(log_domain, log_level, "Sampling param. : %d", capture_opts->sampling_param);
#endif
#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
g_log(log_domain, log_level, "BufferSize : %u (MB)", capture_opts->buffer_size);
#endif
g_log(log_domain, log_level, "Interface Name : %s", capture_opts->iface);
g_log(log_domain, log_level, "Interface Descr. : %s", capture_opts->iface_descr);
g_log(log_domain, log_level, "SnapLen (%u): %u", capture_opts->has_snaplen, capture_opts->snaplen);
g_log(log_domain, log_level, "Promisc : %u", capture_opts->promisc_mode);
g_log(log_domain, log_level, "LinkType : %d", capture_opts->linktype);
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) {
capture_opts->sampling_method = CAPTURE_SAMP_BY_COUNT;
capture_opts->sampling_param = get_positive_int(p, "sampling count");
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) {
capture_opts->sampling_method = CAPTURE_SAMP_BY_TIMER;
capture_opts->sampling_param = get_positive_int(p, "sampling timer");
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_COUNT;
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++;
capture_opts->auth_type = CAPTURE_AUTH_PWD;
capture_opts->auth_username = g_strdup(arg);
capture_opts->auth_password = g_strdup(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:
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, adapter_index - 1);
if (if_info == NULL) {
cmdarg_err("There is no interface with that adapter index");
return 1;
}
capture_opts->iface = g_strdup(if_info->name);
interface_opts.name = g_strdup(if_info->name);
/* 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...
*/
free_interface_list(if_list);
} else {
capture_opts->iface = g_strdup(optarg_str_p);
interface_opts.name = g_strdup(optarg_str_p);
}
if (capture_opts->default_options.descr) {
interface_opts.descr = g_strdup(capture_opts->default_options.descr);
} else {
interface_opts.descr = NULL;
}
interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
interface_opts.snaplen = capture_opts->default_options.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;
if (capture_opts->default_options.remote_host) {
interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
} else {
interface_opts.remote_host = NULL;
}
if (capture_opts->default_options.remote_port) {
interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
} else {
interface_opts.remote_port = NULL;
}
interface_opts.auth_type = capture_opts->default_options.auth_type;
if (capture_opts->default_options.auth_username) {
interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
} else {
interface_opts.auth_username = NULL;
}
if (capture_opts->default_options.auth_password) {
interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
} else {
interface_opts.auth_password = NULL;
}
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;
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 */
capture_opts->buffer_size = get_positive_int(optarg_str_p, "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 */
capture_opts->has_cfilter = TRUE;
g_free(capture_opts->cfilter);
capture_opts->cfilter = g_strdup(optarg_str_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);
g_free(interface_opts.cfilter);
interface_opts.cfilter = g_strdup(capture_opts->cfilter);
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
g_free(capture_opts->default_options.cfilter);
capture_opts->default_options.cfilter = g_strdup(capture_opts->cfilter);
}
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 */
capture_opts->monitor_mode = TRUE;
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 */
capture_opts->promisc_mode = FALSE;
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 'Q': /* Quit after capture (just capture to file) */
capture_opts->quit_after_cap = TRUE;
*start_capture = TRUE; /*** -Q implies -k !! ***/
break;
#ifdef HAVE_PCAP_REMOTE
case 'r':
capture_opts->nocap_rpcap = FALSE;
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 */
capture_opts->has_snaplen = TRUE;
capture_opts->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 (capture_opts->snaplen == 0)
capture_opts->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.snaplen = capture_opts->snaplen;
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.snaplen = capture_opts->snaplen;
}
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':
capture_opts->datatx_udp = TRUE;
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);
#if defined _WIN32 && GLIB_CHECK_VERSION(2,6,0)
/* since GLib 2.6, we need to convert filenames to utf8 for Win32 */
capture_opts->save_file = g_locale_to_utf8(optarg_str_p, -1, NULL, NULL, NULL);
#else
capture_opts->save_file = g_strdup(optarg_str_p);
#endif
status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
return status;
case 'g': /* enable group read access on the capture file(s) */
capture_opts->group_read_access = TRUE;
break;
case 'y': /* Set the pcap data link type */
capture_opts->linktype = linktype_name_to_val(optarg_str_p);
if (capture_opts->linktype == -1) {
cmdarg_err("The specified data link type \"%s\" isn't valid",
optarg_str_p);
return 1;
}
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);
g_array_append_val(capture_opts->ifaces, interface_opts);
} else {
capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
}
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 description if it exists */
if (if_info->description != NULL)
fprintf_stderr(" (%s)", if_info->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->snaplen < 1)
capture_opts->snaplen = WTAP_MAX_PACKET_SIZE;
else if (capture_opts->snaplen < snaplen_min)
capture_opts->snaplen = snaplen_min;
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);
}
}
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
}
gboolean capture_opts_trim_iface(capture_options *capture_opts, const char *capture_device)
{
GList *if_list;
if_info_t *if_info;
int err;
gchar *err_str;
interface_options interface_opts;
/* Did the user specify an interface to use? */
if (capture_opts->ifaces->len == 0) {
/* No - is a default specified in the preferences file? */
if (capture_device != NULL) {
/* Yes - use it. */
capture_opts->iface = g_strdup(capture_device);
interface_opts.name = g_strdup(capture_device);
/* 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...
*/
} else {
/* No - pick the first one from the list of interfaces. */
if_list = capture_interface_list(&err, &err_str);
if (if_list == NULL) {
switch (err) {
case CANT_GET_INTERFACE_LIST:
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 FALSE;
}
if_info = (if_info_t *)if_list->data; /* first interface */
capture_opts->iface = g_strdup(if_info->name);
interface_opts.name = g_strdup(if_info->name);
/* 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...
*/
free_interface_list(if_list);
}
if (capture_opts->default_options.descr) {
interface_opts.descr = g_strdup(capture_opts->default_options.descr);
} else {
interface_opts.descr = NULL;
}
interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
interface_opts.snaplen = capture_opts->default_options.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;
if (capture_opts->default_options.remote_host) {
interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
} else {
interface_opts.remote_host = NULL;
}
if (capture_opts->default_options.remote_port) {
interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
} else {
interface_opts.remote_port = NULL;
}
interface_opts.auth_type = capture_opts->default_options.auth_type;
if (capture_opts->default_options.auth_username) {
interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
} else {
interface_opts.auth_username = NULL;
}
if (capture_opts->default_options.auth_password) {
interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
} else {
interface_opts.auth_password = NULL;
}
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