*
* $Id$
*
- * Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@ethereal.com>
+ * 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
#include <string.h>
#include <ctype.h>
-#ifdef HAVE_IO_H
-# include <io.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
#endif
-#include <pcap.h>
-
#include <glib.h>
#include <epan/packet.h>
-#include "capture.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 *cfile)
+capture_opts_init(capture_options *capture_opts, void *cf)
{
- capture_opts->cf = cfile;
- capture_opts->cfilter = g_strdup(""); /* No capture filter string specified */
+ capture_opts->cf = cf;
+ capture_opts->cfilter = g_strdup(""); /* No capture filter string specified */
capture_opts->iface = NULL; /* Default is "pick the first interface" */
-#ifdef _WIN32
+ capture_opts->iface_descr = NULL;
+#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 */
+ 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->capture_child = FALSE;
+ capture_opts->saving_to_file = FALSE;
capture_opts->save_file = NULL;
- capture_opts->save_file_fd = -1;
- capture_opts->sync_mode = TRUE;
+ 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->has_autostop_files = FALSE;
capture_opts->autostop_files = 1;
- capture_opts->has_autostop_packets = FALSE;
+ capture_opts->has_autostop_packets = FALSE;
capture_opts->autostop_packets = 0;
capture_opts->has_autostop_filesize = FALSE;
- capture_opts->autostop_filesize = 1024 * 1024; /* 1 MB */
+ 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
}
-/* debug only: print content of capture_opts to console */
+/* log content of capture_opts */
void
-capture_opts_info(capture_options *capture_opts) {
- g_warning("CAPTURE OPTIONS :");
- g_warning("File : %s", capture_opts->cf);
- g_warning("Filter : %s", capture_opts->cfilter);
- g_warning("Interface : %s", capture_opts->iface);
+capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts) {
+ g_log(log_domain, log_level, "CAPTURE OPTIONS :");
+ g_log(log_domain, log_level, "CFile : 0x%p", capture_opts->cf);
+ g_log(log_domain, log_level, "Filter : %s", capture_opts->cfilter);
+ g_log(log_domain, log_level, "Interface : %s", capture_opts->iface);
+ /* iface_descr may not been filled in and some C Libraries hate a null ptr for %s */
+ g_log(log_domain, log_level, "Interface Descr : %s",
+ capture_opts->iface_descr ? capture_opts->iface_descr : "<null>");
+#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
+#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, "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_warning("BufferSize : %u (MB)", capture_opts->buffer_size);
+ g_log(log_domain, log_level, "SignalPipeWrite : %d", capture_opts->signal_pipe_write_fd);
#endif
- g_warning("SnapLen (%u): %u", capture_opts->has_snaplen, capture_opts->snaplen);
- g_warning("Promisc : %u", capture_opts->promisc_mode);
- g_warning("LinkType : %d", capture_opts->linktype);
- g_warning("Child : %u", capture_opts->capture_child);
- g_warning("SaveFile : %s", capture_opts->save_file);
- g_warning("SaveFileFd : %d", capture_opts->save_file_fd);
- g_warning("SyncMode : %u", capture_opts->sync_mode);
- g_warning("ShowInfo : %u", capture_opts->show_info);
- g_warning("QuitAfterCap : %u", capture_opts->quit_after_cap);
-
- g_warning("MultiFilesOn : %u", capture_opts->multi_files_on);
- g_warning("FileDuration (%u): %u", capture_opts->has_file_duration, capture_opts->file_duration);
- g_warning("RingNumFiles (%u): %u", capture_opts->has_ring_num_files, capture_opts->ring_num_files);
-
- g_warning("AutostopFiles (%u): %u", capture_opts->has_autostop_files, capture_opts->autostop_files);
- g_warning("AutostopPackets (%u): %u", capture_opts->has_autostop_packets, capture_opts->autostop_packets);
- g_warning("AutostopFilesize(%u): %u", capture_opts->has_autostop_filesize, capture_opts->autostop_filesize);
- g_warning("AutostopDuration(%u): %u", capture_opts->has_autostop_duration, capture_opts->autostop_duration);
-
- g_warning("ForkChild : %d", capture_opts->fork_child);
}
/*
* in some fashion.
*/
static gboolean
-set_autostop_criterion(capture_options *capture_opts, const char *appname, const char *autostoparg)
+set_autostop_criterion(capture_options *capture_opts, const char *autostoparg)
{
gchar *p, *colonp;
}
if (strcmp(autostoparg,"duration") == 0) {
capture_opts->has_autostop_duration = TRUE;
- capture_opts->autostop_duration = get_positive_int(appname, p,"autostop duration");
+ 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(appname, p,"autostop filesize");
+ 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(appname, p,"autostop files");
+ capture_opts->autostop_files = get_positive_int(p,"autostop files");
} else {
return FALSE;
}
* in some fashion.
*/
static gboolean
-get_ring_arguments(capture_options *capture_opts, const char *appname, const char *arg)
+get_ring_arguments(capture_options *capture_opts, const char *arg)
{
gchar *p = NULL, *colonp;
colonp = strchr(arg, ':');
if (colonp == NULL)
- return TRUE;
+ return FALSE;
p = colonp;
*p++ = '\0';
if (strcmp(arg,"files") == 0) {
capture_opts->has_ring_num_files = TRUE;
- capture_opts->ring_num_files = get_natural_int(appname, p, "number of ring buffer files");
+ 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(appname, p, "ring buffer filesize");
+ 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(appname, p, "ring buffer duration");
+ capture_opts->file_duration = get_positive_int(p, "ring buffer duration");
}
- *colonp = ':'; /* put the colon back */
+ *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;
-void
-capture_opts_add_opt(capture_options *capture_opts, const char *appname, int opt, const char *optarg, gboolean *start_capture)
+ 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");
+ } else if (strcmp(arg, "timer") == 0) {
+ capture_opts->sampling_method = CAPTURE_SAMP_BY_TIMER;
+ capture_opts->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)
{
-#ifdef _WIN32
- int i;
+ 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);
+ *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;
+
+
+ /*
+ * 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);
+ /* 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);
+ }
+
+ 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, appname, optarg) == FALSE) {
- fprintf(stderr, "%s: Invalid or unknown -a flag \"%s\"\n", appname, optarg);
- exit(1);
+ 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, appname, optarg) == FALSE) {
- fprintf(stderr, "%s: Invalid or unknown -b arg \"%s\"\n", appname, optarg);
- exit(1);
+ if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
+ cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
+ return 1;
}
break;
- case 'c': /* Capture xxx packets */
+#if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
+ case 'B': /* Buffer size */
+ capture_opts->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(appname, optarg, "packet count");
+ capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
break;
case 'f': /* capture filter */
- if (capture_opts->cfilter)
- g_free(capture_opts->cfilter);
- capture_opts->cfilter = g_strdup(optarg);
+ if (capture_opts->has_cfilter) {
+ cmdarg_err("More than one -f argument specified");
+ return 1;
+ }
+ capture_opts->has_cfilter = TRUE;
+ g_free(capture_opts->cfilter);
+ capture_opts->cfilter = g_strdup(optarg_str_p);
break;
case 'H': /* Hide capture info dialog box */
capture_opts->show_info = FALSE;
break;
- case 'i': /* Use interface xxx */
- capture_opts->iface = g_strdup(optarg);
+ 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;
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;
break;
capture_opts->quit_after_cap = TRUE;
*start_capture = TRUE; /*** -Q implies -k !! ***/
break;
+#ifdef HAVE_PCAP_REMOTE
+ case 'r':
+ capture_opts->nocap_rpcap = FALSE;
+ break;
+#endif
case 's': /* Set the snapshot (capture) length */
capture_opts->has_snaplen = TRUE;
- capture_opts->snaplen = get_positive_int(appname, optarg, "snapshot length");
+ 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;
+ break;
+ case 'S': /* "Real-Time" mode: used for following file ala tail -f */
+ capture_opts->real_time_mode = TRUE;
break;
- case 'S': /* "Sync" mode: used for following file ala tail -f */
- capture_opts->sync_mode = TRUE;
+#ifdef HAVE_PCAP_REMOTE
+ case 'u':
+ capture_opts->datatx_udp = TRUE;
break;
- case 'w': /* Write to capture file xxx */
- capture_opts->save_file = g_strdup(optarg);
- break;
- case 'W': /* Write to capture file FD xxx */
- capture_opts->save_file_fd = atoi(optarg);
+#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 */
-#ifdef HAVE_PCAP_DATALINK_NAME_TO_VAL
- capture_opts->linktype = pcap_datalink_name_to_val(optarg);
+ capture_opts->linktype = linktype_name_to_val(optarg_str_p);
if (capture_opts->linktype == -1) {
- fprintf(stderr, "%s: The specified data link type \"%s\" isn't valid\n",
- appname, optarg);
- exit(1);
+ cmdarg_err("The specified data link type \"%s\" isn't valid",
+ optarg_str_p);
+ return 1;
}
-#else /* HAVE_PCAP_DATALINK_NAME_TO_VAL */
- /* XXX - just treat it as a number */
- capture_opts->linktype = get_natural_int(appname, optarg, "data link type");
-#endif /* HAVE_PCAP_DATALINK_NAME_TO_VAL */
break;
-#ifdef _WIN32
- /* Hidden option supporting Sync mode */
- case 'Z': /* Write to pipe FD XXX */
- /* associate stdout with pipe */
- i = atoi(optarg);
- if (dup2(i, 1) < 0) {
- fprintf(stderr, "%s: Unable to dup pipe handle\n", appname);
- exit(1);
- }
- break;
-#endif /* _WIN32 */
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,
+ gboolean monitor_mode)
+{
+ GList *lt_entry;
+ data_link_info_t *data_link_info;
+
+ if (caps->can_set_rfmon)
+ fprintf_stderr("Data link types when %sin monitor mode (use option -y to set):\n",
+ monitor_mode ? "" : "not ");
+ else
+ fprintf_stderr("Data link types (use option -y to set):\n");
+ 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;
+ printf("%d. %s", i++, if_info->name);
+
+ /* Print the description if it exists */
+ if (if_info->description != NULL)
+ printf(" (%s)", if_info->description);
+ printf("\n");
+ }
+}
+
+
+void capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min)
+{
+ if (capture_opts->snaplen < 1)
+ capture_opts->snaplen = WTAP_MAX_PACKET_SIZE;
+ else if (capture_opts->snaplen < snaplen_min)
+ capture_opts->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
+}
+
+
+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;
+
+
+ /* Did the user specify an interface to use? */
+ if (capture_opts->iface == NULL) {
+ /* No - is a default specified in the preferences file? */
+ if (capture_device != NULL) {
+ /* Yes - use it. */
+ capture_opts->iface = 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);
+ /* 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);
+ }
+ }
+
+ return TRUE;
+}
+
+
+
+#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)
+{
+ struct stat statb;
+
+ if (ws_stat(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;
}
#endif /* HAVE_LIBPCAP */
git.samba.org / obnox / wireshark / wip.git / blobdiff