/* capture.c
* Routines for packet capture windows
*
- * $Id: capture.c,v 1.168 2002/01/21 07:36:31 guy Exp $
+ * $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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.
*/
+/* With MSVC and a libethereal.dll this file needs to import some variables
+ in a special way. Therefore _NEED_VAR_IMPORT_ is defined. */
+#define _NEED_VAR_IMPORT_
+
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_LIBPCAP
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
# include <io.h>
#endif
-#include <gtk/gtk.h>
+#include <pcap.h>
+
+#include <glib.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#include <errno.h>
-#include <pcap.h>
-
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include <process.h> /* For spawning child process */
#endif
-/*
- * XXX - the various BSDs appear to define BSD in <sys/param.h>; we don't
- * want to include it if it's not present on this platform, however.
- */
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__)
-#ifndef BSD
-#define BSD
-#endif /* BSD */
-#endif /* defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) */
-
/*
* We don't want to do a "select()" on the pcap_t's file descriptor on
* BSD (because "select()" doesn't work correctly on BPF devices on at
* least some releases of some flavors of BSD), and we don't want to do
* it on Windows (because "select()" is something for sockets, not for
- * arbitrary handles).
+ * arbitrary handles). (Note that "Windows" here includes Cygwin;
+ * even in its pretend-it's-UNIX environment, we're using WinPcap, not
+ * a UNIX libpcap.)
*
* We *do* want to do it on other platforms, as, on other platforms (with
* the possible exception of Ultrix and Digital UNIX), the read timeout
* doesn't expire if no packets have arrived, so a "pcap_dispatch()" call
* will block until packets arrive, causing the UI to hang.
+ *
+ * XXX - the various BSDs appear to define BSD in <sys/param.h>; we don't
+ * want to include it if it's not present on this platform, however.
*/
-#if !defined(BSD) && !defined(_WIN32)
+#if !defined(__FreeBSD__) && !defined(__NetBSD__) && !defined(__OpenBSD__) && \
+ !defined(__bsdi__) && !defined(__APPLE__) && !defined(_WIN32) && \
+ !defined(__CYGWIN__)
# define MUST_DO_SELECT
#endif
-#include "gtk/main.h"
-#include "gtk/gtkglobals.h"
#include <epan/packet.h>
+#include <epan/dfilter/dfilter.h>
#include "file.h"
#include "capture.h"
#include "util.h"
#include "pcap-util.h"
+#include "alert_box.h"
#include "simple_dialog.h"
-#include "prefs.h"
+#include <epan/prefs.h>
#include "globals.h"
#include "conditions.h"
#include "capture_stop_conditions.h"
#include "wiretap/libpcap.h"
#include "wiretap/wtap.h"
+#include "wiretap/wtap-capture.h"
+
+#include <epan/dissectors/packet-ap1394.h>
+#include <epan/dissectors/packet-atalk.h>
+#include <epan/dissectors/packet-atm.h>
+#include <epan/dissectors/packet-clip.h>
+#include <epan/dissectors/packet-eth.h>
+#include <epan/dissectors/packet-fddi.h>
+#include <epan/dissectors/packet-null.h>
+#include <epan/dissectors/packet-ppp.h>
+#include <epan/dissectors/packet-raw.h>
+#include <epan/dissectors/packet-sll.h>
+#include <epan/dissectors/packet-tr.h>
+#include <epan/dissectors/packet-ieee80211.h>
+#include <epan/dissectors/packet-chdlc.h>
+#include <epan/dissectors/packet-prism.h>
+#include <epan/dissectors/packet-ipfc.h>
+#include <epan/dissectors/packet-arcnet.h>
-#include "packet-atalk.h"
-#include "packet-clip.h"
-#include "packet-eth.h"
-#include "packet-fddi.h"
-#include "packet-null.h"
-#include "packet-ppp.h"
-#include "packet-raw.h"
-#include "packet-sll.h"
-#include "packet-tr.h"
-#include "packet-ieee80211.h"
-#include "packet-chdlc.h"
-#include "packet-prism.h"
-
-#ifdef WIN32
+#ifdef _WIN32
#include "capture-wpcap.h"
#endif
+#include "ui_util.h"
+
+/*
+ * Capture options.
+ */
+capture_options capture_opts;
+gboolean quit_after_cap = FALSE;/* Makes a "capture only mode". Implies -k */
+gboolean capture_child; /* if this is the child for "-S" */
-int promisc_mode; /* capture in promiscuous mode */
-int sync_mode; /* fork a child to do the capture, and sync between them */
-static int sync_pipe[2]; /* used to sync father */
-enum PIPES { READ, WRITE }; /* Constants 0 and 1 for READ and WRITE */
-int quit_after_cap; /* Makes a "capture only mode". Implies -k */
-gboolean capture_child; /* if this is the child for "-S" */
-static int fork_child = -1; /* If not -1, in parent, process ID of child */
-static guint cap_input_id;
+static int sync_pipe[2]; /* used to sync father */
+enum PIPES { READ, WRITE }; /* Constants 0 and 1 for READ and WRITE */
+static int fork_child = -1; /* If not -1, in parent, process ID of child */
+
+/* Size of buffer to hold decimal representation of
+ signed/unsigned 64-bit int */
+#define SP_DECISIZE 20
/*
* Indications sent out on the sync pipe.
*/
-#define SP_CAPSTART ';' /* capture start message */
+#define SP_CAPSTART ';' /* capture start message */
#define SP_PACKET_COUNT '*' /* followed by count of packets captured since last message */
#define SP_ERROR_MSG '!' /* followed by length of error message that follows */
-#define SP_DROPS '#' /* followed by count of packets dropped in capture */
-
-#ifdef _WIN32
-static guint cap_timer_id;
-static int cap_timer_cb(gpointer); /* Win32 kludge to check for pipe input */
-#endif
+#define SP_DROPS '#' /* followed by count of packets dropped in capture */
-static void cap_file_input_cb(gpointer, gint, GdkInputCondition);
-static void wait_for_child(gboolean);
-#ifndef _WIN32
-static char *signame(int);
-#endif
-static void capture_delete_cb(GtkWidget *, GdkEvent *, gpointer);
-static void capture_stop_cb(GtkWidget *, gpointer);
-static void capture_pcap_cb(u_char *, const struct pcap_pkthdr *,
- const u_char *);
-static void get_capture_file_io_error(char *, int, const char *, int, gboolean);
-static void send_errmsg_to_parent(const char *);
-static float pct(gint, gint);
-static void stop_capture(int signo);
typedef struct _loop_data {
gboolean go; /* TRUE as long as we're supposed to keep capturing */
gint linktype;
gint sync_packets;
gboolean pcap_err; /* TRUE if error from pcap */
- gboolean from_pipe; /* TRUE if we are capturing data from a pipe */
- gboolean modified; /* TRUE if data in the pipe uses modified pcap headers */
- gboolean byte_swapped; /* TRUE if data in the pipe is byte swapped */
+ gboolean from_cap_pipe;/* TRUE if we are capturing data from a pipe */
packet_counts counts;
wtap_dumper *pdh;
-} loop_data;
-
#ifndef _WIN32
-static void adjust_header(loop_data *, struct pcap_hdr *, struct pcaprec_hdr *);
-static int pipe_open_live(char *, struct pcap_hdr *, loop_data *, char *);
-static int pipe_dispatch(int, loop_data *, struct pcap_hdr *);
+ gboolean modified; /* TRUE if data in the pipe uses modified pcap headers */
+ gboolean byte_swapped; /* TRUE if data in the pipe is byte swapped */
+ unsigned int bytes_to_read, bytes_read; /* Used by cap_pipe_dispatch */
+ enum {
+ STATE_EXPECT_REC_HDR, STATE_READ_REC_HDR,
+ STATE_EXPECT_DATA, STATE_READ_DATA
+ } cap_pipe_state;
+
+ enum { PIPOK, PIPEOF, PIPERR, PIPNEXIST } cap_pipe_err;
#endif
+} loop_data;
/* Win32 needs the O_BINARY flag for open() */
#ifndef O_BINARY
#define O_BINARY 0
#endif
-#ifdef _WIN32
-/* Win32 needs a handle to the child capture process */
-int child_process;
+static gboolean sync_pipe_do_capture(gboolean is_tempfile);
+static gboolean sync_pipe_input_cb(gint source, gpointer user_data);
+static void sync_pipe_wait_for_child(gboolean);
+static void sync_pipe_errmsg_to_parent(const char *);
+#ifndef _WIN32
+static char *sync_pipe_signame(int);
+#endif
+
+static gboolean normal_do_capture(gboolean is_tempfile);
+static void capture_pcap_cb(guchar *, const struct pcap_pkthdr *,
+ const guchar *);
+static void get_capture_file_io_error(char *, int, const char *, int, gboolean);
+static void popup_errmsg(const char *);
+static void stop_capture_signal_handler(int signo);
+
+#ifndef _WIN32
+static void cap_pipe_adjust_header(loop_data *, struct pcap_hdr *, struct pcaprec_hdr *);
+static int cap_pipe_open_live(char *, struct pcap_hdr *, loop_data *, char *, int);
+static int cap_pipe_dispatch(int, loop_data *, struct pcap_hdr *, \
+ struct pcaprec_modified_hdr *, guchar *, char *, int);
#endif
+
+
+
+
+
+/* Open a specified file, or create a temporary file, and start a capture
+ to the file in question. Returns TRUE if the capture starts
+ successfully, FALSE otherwise. */
+gboolean
+do_capture(const char *save_file)
+{
+ char tmpname[128+1];
+ gboolean is_tempfile;
+ gchar *capfile_name;
+ gboolean ret;
+
+ if (save_file != NULL) {
+ /* If the Sync option is set, we return to the caller while the capture
+ * is in progress. Therefore we need to take a copy of save_file in
+ * case the caller destroys it after we return.
+ */
+ capfile_name = g_strdup(save_file);
+ if (capture_opts.multi_files_on) {
+ /* ringbuffer is enabled */
+ cfile.save_file_fd = ringbuf_init(capfile_name,
+ (capture_opts.has_ring_num_files) ? capture_opts.ring_num_files : 0);
+ } else {
+ /* Try to open/create the specified file for use as a capture buffer. */
+ cfile.save_file_fd = open(capfile_name, O_RDWR|O_BINARY|O_TRUNC|O_CREAT,
+ 0600);
+ }
+ is_tempfile = FALSE;
+ } else {
+ /* Choose a random name for the capture buffer */
+ cfile.save_file_fd = create_tempfile(tmpname, sizeof tmpname, "ether");
+ capfile_name = g_strdup(tmpname);
+ is_tempfile = TRUE;
+ }
+ if (cfile.save_file_fd == -1) {
+ if (is_tempfile) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "The temporary file to which the capture would be saved (\"%s\")"
+ "could not be opened: %s.", capfile_name, strerror(errno));
+ } else {
+ if (capture_opts.multi_files_on) {
+ ringbuf_error_cleanup();
+ }
+ open_failure_alert_box(capfile_name, errno, TRUE);
+ }
+ g_free(capfile_name);
+ return FALSE;
+ }
+ cf_close(&cfile);
+ g_assert(cfile.save_file == NULL);
+ cfile.save_file = capfile_name;
+ /* cfile.save_file is "g_free"ed below, which is equivalent to
+ "g_free(capfile_name)". */
+ fork_child = -1;
+
+ if (capture_opts.sync_mode) {
+ /* sync mode: do the capture in a child process */
+ ret = sync_pipe_do_capture(is_tempfile);
+ /* capture is still running */
+ set_main_window_name("(Live Capture in Progress) - Ethereal");
+ } else {
+ /* normal mode: do the capture synchronously */
+ set_main_window_name("(Live Capture in Progress) - Ethereal");
+ ret = normal_do_capture(is_tempfile);
+ /* capture is finished here */
+ }
+
+ return ret;
+}
+
+
+
/* Add a string pointer to a NULL-terminated array of string pointers. */
static char **
-add_arg(char **args, int *argc, char *arg)
+sync_pipe_add_arg(char **args, int *argc, char *arg)
{
/* Grow the array; "*argc" currently contains the number of string
pointers, *not* counting the NULL pointer at the end, so we have
the string, so we can pass it as an argument with "spawnvp" even
if it contains blanks. */
char *
-quote_encapsulate(const char *string)
+sync_pipe_quote_encapsulate(const char *string)
{
char *encapsulated_string;
}
#endif
-/* Open a specified file, or create a temporary file, and start a capture
- to the file in question. */
-void
-do_capture(char *capfile_name)
-{
- char tmpname[128+1];
- gboolean is_tempfile;
- u_char c;
- int i;
- guint byte_count;
- char *msg;
- int err;
- int capture_succeeded;
- gboolean stats_known;
- struct pcap_stat stats;
- if (capfile_name != NULL) {
- if (cfile.ringbuffer_on) {
- /* ringbuffer is enabled */
- cfile.save_file_fd = ringbuf_init(capfile_name, cfile.ringbuffer_num_files);
- } else {
- /* Try to open/create the specified file for use as a capture buffer. */
- cfile.save_file_fd = open(capfile_name, O_RDWR|O_BINARY|O_TRUNC|O_CREAT, 0600);
- }
- is_tempfile = FALSE;
- } else {
- /* Choose a random name for the capture buffer */
- cfile.save_file_fd = create_tempfile(tmpname, sizeof tmpname, "ether");
- capfile_name = g_strdup(tmpname);
- is_tempfile = TRUE;
- }
- if (cfile.save_file_fd == -1) {
- if (is_tempfile) {
- simple_dialog(ESD_TYPE_CRIT, NULL,
- "The temporary file to which the capture would be saved (\"%s\")"
- "could not be opened: %s.", capfile_name, strerror(errno));
- } else {
- if (cfile.ringbuffer_on) {
- ringbuf_error_cleanup();
- }
- simple_dialog(ESD_TYPE_CRIT, NULL,
- file_open_error_message(errno, TRUE), capfile_name);
- }
- return;
- }
- close_cap_file(&cfile);
- g_assert(cfile.save_file == NULL);
- cfile.save_file = capfile_name;
- if (sync_mode) { /* do the capture in a child process */
+static gboolean
+sync_pipe_do_capture(gboolean is_tempfile) {
+ guint byte_count;
+ int i;
+ guchar c;
+ char *msg;
+ int err;
char ssnap[24];
char scount[24]; /* need a constant for len of numbers */
char sautostop_filesize[24]; /* need a constant for len of numbers */
char sautostop_duration[24]; /* need a constant for len of numbers */
char save_file_fd[24];
+#ifndef _WIN32
char errmsg[1024+1];
+#endif
int error;
int argc;
char **argv;
*argv = NULL;
/* Now add those arguments used on all platforms. */
- argv = add_arg(argv, &argc, CHILD_NAME);
+ argv = sync_pipe_add_arg(argv, &argc, CHILD_NAME);
- argv = add_arg(argv, &argc, "-i");
- argv = add_arg(argv, &argc, cfile.iface);
+ argv = sync_pipe_add_arg(argv, &argc, "-i");
+ argv = sync_pipe_add_arg(argv, &argc, cfile.iface);
- argv = add_arg(argv, &argc, "-w");
- argv = add_arg(argv, &argc, cfile.save_file);
+ argv = sync_pipe_add_arg(argv, &argc, "-w");
+ argv = sync_pipe_add_arg(argv, &argc, cfile.save_file);
- argv = add_arg(argv, &argc, "-W");
+ argv = sync_pipe_add_arg(argv, &argc, "-W");
sprintf(save_file_fd,"%d",cfile.save_file_fd); /* in lieu of itoa */
- argv = add_arg(argv, &argc, save_file_fd);
+ argv = sync_pipe_add_arg(argv, &argc, save_file_fd);
+
+ if (capture_opts.has_autostop_packets) {
+ argv = sync_pipe_add_arg(argv, &argc, "-c");
+ sprintf(scount,"%d",capture_opts.autostop_packets);
+ argv = sync_pipe_add_arg(argv, &argc, scount);
+ }
+
+ if (capture_opts.has_snaplen) {
+ argv = sync_pipe_add_arg(argv, &argc, "-s");
+ sprintf(ssnap,"%d",capture_opts.snaplen);
+ argv = sync_pipe_add_arg(argv, &argc, ssnap);
+ }
- argv = add_arg(argv, &argc, "-c");
- sprintf(scount,"%d",cfile.count);
- argv = add_arg(argv, &argc, scount);
+ if (capture_opts.linktype != -1) {
+ argv = sync_pipe_add_arg(argv, &argc, "-y");
+#ifdef HAVE_PCAP_DATALINK_VAL_TO_NAME
+ sprintf(ssnap,"%s",pcap_datalink_val_to_name(capture_opts.linktype));
+#else
+ /* XXX - just treat it as a number */
+ sprintf(ssnap,"%d",capture_opts.linktype);
+#endif
+ argv = sync_pipe_add_arg(argv, &argc, ssnap);
+ }
- argv = add_arg(argv, &argc, "-s");
- sprintf(ssnap,"%d",cfile.snap);
- argv = add_arg(argv, &argc, ssnap);
+ if (capture_opts.has_autostop_filesize) {
+ argv = sync_pipe_add_arg(argv, &argc, "-a");
+ sprintf(sautostop_filesize,"filesize:%d",capture_opts.autostop_filesize);
+ argv = sync_pipe_add_arg(argv, &argc, sautostop_filesize);
+ }
- argv = add_arg(argv, &argc, "-a");
- sprintf(sautostop_filesize,"filesize:%d",cfile.autostop_filesize);
- argv = add_arg(argv, &argc, sautostop_filesize);
+ if (capture_opts.has_autostop_duration) {
+ argv = sync_pipe_add_arg(argv, &argc, "-a");
+ sprintf(sautostop_duration,"duration:%d",capture_opts.autostop_duration);
+ argv = sync_pipe_add_arg(argv, &argc, sautostop_duration);
+ }
- argv = add_arg(argv, &argc, "-a");
- sprintf(sautostop_duration,"duration:%d",cfile.autostop_duration);
- argv = add_arg(argv, &argc, sautostop_duration);
+ if (!capture_opts.show_info) {
+ argv = sync_pipe_add_arg(argv, &argc, "-H");
+ }
- if (!promisc_mode)
- argv = add_arg(argv, &argc, "-p");
+ if (!capture_opts.promisc_mode)
+ argv = sync_pipe_add_arg(argv, &argc, "-p");
#ifdef _WIN32
/* Create a pipe for the child process */
unlink(cfile.save_file);
g_free(cfile.save_file);
cfile.save_file = NULL;
- simple_dialog(ESD_TYPE_CRIT, NULL, "Couldn't create sync pipe: %s",
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Couldn't create sync pipe: %s",
strerror(error));
- return;
+ return FALSE;
}
/* Convert font name to a quote-encapsulated string and pass to child */
- argv = add_arg(argv, &argc, "-m");
- fontstring = quote_encapsulate(prefs.gui_font_name);
- argv = add_arg(argv, &argc, fontstring);
+ argv = sync_pipe_add_arg(argv, &argc, "-m");
+ fontstring = sync_pipe_quote_encapsulate(prefs.PREFS_GUI_FONT_NAME);
+ argv = sync_pipe_add_arg(argv, &argc, fontstring);
/* Convert pipe write handle to a string and pass to child */
- argv = add_arg(argv, &argc, "-Z");
+ argv = sync_pipe_add_arg(argv, &argc, "-Z");
itoa(sync_pipe[WRITE], sync_pipe_fd, 10);
- argv = add_arg(argv, &argc, sync_pipe_fd);
+ argv = sync_pipe_add_arg(argv, &argc, sync_pipe_fd);
/* Convert filter string to a quote delimited string and pass to child */
+ filterstring = NULL;
if (cfile.cfilter != NULL && strlen(cfile.cfilter) != 0) {
- argv = add_arg(argv, &argc, "-f");
- filterstring = quote_encapsulate(cfile.cfilter);
- argv = add_arg(argv, &argc, filterstring);
+ argv = sync_pipe_add_arg(argv, &argc, "-f");
+ filterstring = sync_pipe_quote_encapsulate(cfile.cfilter);
+ argv = sync_pipe_add_arg(argv, &argc, filterstring);
}
/* Spawn process */
fork_child = spawnvp(_P_NOWAIT, ethereal_path, argv);
g_free(fontstring);
- g_free(filterstring);
- /* Keep a copy for later evaluation by _cwait() */
- child_process = fork_child;
+ if (filterstring) {
+ g_free(filterstring);
+ }
#else
- signal(SIGCHLD, SIG_IGN);
if (pipe(sync_pipe) < 0) {
/* Couldn't create the pipe between parent and child. */
error = errno;
unlink(cfile.save_file);
g_free(cfile.save_file);
cfile.save_file = NULL;
- simple_dialog(ESD_TYPE_CRIT, NULL, "Couldn't create sync pipe: %s",
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "Couldn't create sync pipe: %s",
strerror(error));
- return;
+ return FALSE;
}
- argv = add_arg(argv, &argc, "-m");
- argv = add_arg(argv, &argc, prefs.gui_font_name);
+ argv = sync_pipe_add_arg(argv, &argc, "-m");
+ argv = sync_pipe_add_arg(argv, &argc, prefs.PREFS_GUI_FONT_NAME);
if (cfile.cfilter != NULL && strlen(cfile.cfilter) != 0) {
- argv = add_arg(argv, &argc, "-f");
- argv = add_arg(argv, &argc, cfile.cfilter);
+ argv = sync_pipe_add_arg(argv, &argc, "-f");
+ argv = sync_pipe_add_arg(argv, &argc, cfile.cfilter);
}
if ((fork_child = fork()) == 0) {
execvp(ethereal_path, argv);
snprintf(errmsg, sizeof errmsg, "Couldn't run %s in child process: %s",
ethereal_path, strerror(errno));
- send_errmsg_to_parent(errmsg);
+ sync_pipe_errmsg_to_parent(errmsg);
/* Exit with "_exit()", so that we don't close the connection
to the X server (and cause stuff buffered up by our parent but
unlink(cfile.save_file);
g_free(cfile.save_file);
cfile.save_file = NULL;
- simple_dialog(ESD_TYPE_CRIT, NULL, "Couldn't create child process: %s",
- strerror(error));
- return;
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Couldn't create child process: %s", strerror(error));
+ return FALSE;
}
/* Read a byte count from "sync_pipe[READ]", terminated with a
unlink(cfile.save_file);
g_free(cfile.save_file);
cfile.save_file = NULL;
- wait_for_child(TRUE);
- return;
+ sync_pipe_wait_for_child(TRUE);
+ return FALSE;
}
if (c == SP_CAPSTART || c == SP_ERROR_MSG)
break;
unlink(cfile.save_file);
g_free(cfile.save_file);
cfile.save_file = NULL;
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Capture child process sent us a bad message");
- return;
+ return FALSE;
}
byte_count = byte_count*10 + c - '0';
}
- if (c == SP_CAPSTART) {
- /* Success. Open the capture file, and set up to read it. */
- err = start_tail_cap_file(cfile.save_file, is_tempfile, &cfile);
- if (err == 0) {
- /* We were able to open and set up to read the capture file;
- arrange that our callback be called whenever it's possible
- to read from the sync pipe, so that it's called when
- the child process wants to tell us something. */
-#ifdef _WIN32
- /* Tricky to use pipes in win9x, as no concept of wait. NT can
- do this but that doesn't cover all win32 platforms. GTK can do
- this but doesn't seem to work over processes. Attempt to do
- something similar here, start a timer and check for data on every
- timeout. */
- cap_timer_id = gtk_timeout_add(1000, cap_timer_cb, NULL);
-#else
- cap_input_id = gtk_input_add_full(sync_pipe[READ],
- GDK_INPUT_READ|GDK_INPUT_EXCEPTION,
- cap_file_input_cb,
- NULL,
- (gpointer) &cfile,
- NULL);
-#endif
- } else {
- /* We weren't able to open the capture file; complain, and
- close the sync pipe. */
- simple_dialog(ESD_TYPE_CRIT, NULL,
- file_open_error_message(err, FALSE), cfile.save_file);
-
- /* Close the sync pipe. */
- close(sync_pipe[READ]);
-
- /* Don't unlink the save file - leave it around, for debugging
- purposes. */
- g_free(cfile.save_file);
- cfile.save_file = NULL;
- }
- } else {
+ if (c != SP_CAPSTART) {
/* Failure - the child process sent us a message indicating
what the problem was. */
if (byte_count == 0) {
/* Zero-length message? */
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Capture child process failed, but its error message was empty.");
} else {
msg = g_malloc(byte_count + 1);
if (msg == NULL) {
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Capture child process failed, but its error message was too big.");
} else {
i = read(sync_pipe[READ], msg, byte_count);
msg[byte_count] = '\0';
if (i < 0) {
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Capture child process failed: Error %s reading its error message.",
strerror(errno));
} else if (i == 0) {
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Capture child process failed: EOF reading its error message.");
- wait_for_child(FALSE);
+ sync_pipe_wait_for_child(FALSE);
} else
- simple_dialog(ESD_TYPE_WARN, NULL, msg);
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, msg);
g_free(msg);
}
g_free(cfile.save_file);
cfile.save_file = NULL;
}
+ return FALSE;
}
- } else {
- /* Not sync mode. */
- capture_succeeded = capture(&stats_known, &stats);
- if (quit_after_cap) {
- /* DON'T unlink the save file. Presumably someone wants it. */
- gtk_exit(0);
- }
- if (capture_succeeded) {
- /* Capture succeeded; read in the capture file. */
- if ((err = open_cap_file(cfile.save_file, is_tempfile, &cfile)) == 0) {
- /* Set the read filter to NULL. */
- cfile.rfcode = NULL;
-
- /* Get the packet-drop statistics.
-
- XXX - there are currently no packet-drop statistics stored
- in libpcap captures, and that's what we're reading.
-
- At some point, we will add support in Wiretap to return
- packet-drop statistics for capture file formats that store it,
- and will make "read_cap_file()" get those statistics from
- Wiretap. We clear the statistics (marking them as "not known")
- in "open_cap_file()", and "read_cap_file()" will only fetch
- them and mark them as known if Wiretap supplies them, so if
- we get the statistics now, after calling "open_cap_file()" but
- before calling "read_cap_file()", the values we store will
- be used by "read_cap_file()".
-
- If a future libpcap capture file format stores the statistics,
- we'll put them into the capture file that we write, and will
- thus not have to set them here - "read_cap_file()" will get
- them from the file and use them. */
- if (stats_known) {
- cfile.drops_known = TRUE;
-
- /* XXX - on some systems, libpcap doesn't bother filling in
- "ps_ifdrop" - it doesn't even set it to zero - so we don't
- bother looking at it.
-
- Ideally, libpcap would have an interface that gave us
- several statistics - perhaps including various interface
- error statistics - and would tell us which of them it
- supplies, allowing us to display only the ones it does. */
- cfile.drops = stats.ps_drop;
- }
- switch (read_cap_file(&cfile, &err)) {
-
- case READ_SUCCESS:
- case READ_ERROR:
- /* Just because we got an error, that doesn't mean we were unable
- to read any of the file; we handle what we could get from the
- file. */
- break;
-
- case READ_ABORTED:
- /* Exit by leaving the main loop, so that any quit functions
- we registered get called. */
- gtk_main_quit();
- return;
- }
- }
- }
- /* We're not doing a capture any more, so we don't have a save
- file. */
- if (cfile.ringbuffer_on) {
- ringbuf_free();
- } else {
- g_free(cfile.save_file);
- }
- cfile.save_file = NULL;
- }
-}
-
-#ifdef _WIN32
-/* The timer has expired, see if there's stuff to read from the pipe,
- if so call the cap_file_input_cb */
-static gint
-cap_timer_cb(gpointer data)
-{
- HANDLE handle;
- DWORD avail = 0;
- gboolean result, result1;
- DWORD childstatus;
-
- /* Oddly enough although Named pipes don't work on win9x,
- PeekNamedPipe does !!! */
- handle = (HANDLE) _get_osfhandle (sync_pipe[READ]);
- result = PeekNamedPipe(handle, NULL, 0, NULL, &avail, NULL);
-
- /* Get the child process exit status */
- result1 = GetExitCodeProcess((HANDLE)child_process, &childstatus);
- /* If the Peek returned an error, or there are bytes to be read
- or the childwatcher thread has terminated then call the normal
- callback */
- if (!result || avail > 0 || childstatus != STILL_ACTIVE) {
+ /* The child process started a capture.
+ Attempt to open the capture file and set up to read it. */
+ err = cf_start_tail(cfile.save_file, is_tempfile, &cfile);
+ if (err != 0) {
+ /* We weren't able to open the capture file; user has been
+ alerted. Close the sync pipe. */
- /* avoid reentrancy problems and stack overflow */
- gtk_timeout_remove(cap_timer_id);
+ close(sync_pipe[READ]);
- /* And call the real handler */
- cap_file_input_cb((gpointer) &cfile, 0, 0);
+ /* Don't unlink the save file - leave it around, for debugging
+ purposes. */
+ g_free(cfile.save_file);
+ cfile.save_file = NULL;
+ return FALSE;
+ }
+ /* We were able to open and set up to read the capture file;
+ arrange that our callback be called whenever it's possible
+ to read from the sync pipe, so that it's called when
+ the child process wants to tell us something. */
+ pipe_input_set_handler(sync_pipe[READ], (gpointer) &cfile, &fork_child, sync_pipe_input_cb);
- /* Return false so that the timer is not run again */
- return FALSE;
- }
- else {
- /* No data so let timer run again */
return TRUE;
- }
}
-#endif
+
/* There's stuff to read from the sync pipe, meaning the child has sent
us a message, or the sync pipe has closed, meaning the child has
closed it (perhaps because it exited). */
-static void
-cap_file_input_cb(gpointer data, gint source, GdkInputCondition condition)
+static gboolean
+sync_pipe_input_cb(gint source, gpointer user_data)
{
- capture_file *cf = (capture_file *)data;
+ capture_file *cf = (capture_file *)user_data;
#define BUFSIZE 4096
char buffer[BUFSIZE+1], *p = buffer, *q = buffer, *msg, *r;
int nread, msglen, chars_to_copy;
int to_read = 0;
int err;
-#ifndef _WIN32
- /* avoid reentrancy problems and stack overflow */
- gtk_input_remove(cap_input_id);
-#endif
- if ((nread = read(sync_pipe[READ], buffer, BUFSIZE)) <= 0) {
+ if ((nread = read(source, buffer, BUFSIZE)) <= 0) {
/* The child has closed the sync pipe, meaning it's not going to be
capturing any more packets. Pick up its exit status, and
complain if it did anything other than exit with status 0. */
- wait_for_child(FALSE);
-
+ sync_pipe_wait_for_child(FALSE);
+
/* Read what remains of the capture file, and finish the capture.
XXX - do something if this fails? */
- switch (finish_tail_cap_file(cf, &err)) {
+ switch (cf_finish_tail(cf, &err)) {
case READ_SUCCESS:
+ if(cf->count == 0) {
+ simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+ "%sNo packets captured!%s\n\n"
+ "As no data was captured, closing the %scapture file!",
+ simple_dialog_primary_start(), simple_dialog_primary_end(),
+ (cf->is_tempfile) ? "temporary " : "");
+ cf_close(cf);
+ }
+ break;
case READ_ERROR:
/* Just because we got an error, that doesn't mean we were unable
to read any of the file; we handle what we could get from the
case READ_ABORTED:
/* Exit by leaving the main loop, so that any quit functions
we registered get called. */
- gtk_main_quit();
- return;
+ main_window_quit();
+ return FALSE;
}
/* We're not doing a capture any more, so we don't have a save
g_free(cf->save_file);
cf->save_file = NULL;
- return;
+ return FALSE;
}
buffer[nread] = '\0';
while (msglen != 0) {
if (nread == 0) {
/* Read more. */
- if ((nread = read(sync_pipe[READ], buffer, BUFSIZE)) <= 0)
+ if ((nread = read(source, buffer, BUFSIZE)) <= 0)
break;
p = buffer;
q = buffer;
msglen -= chars_to_copy;
}
*r = '\0';
- simple_dialog(ESD_TYPE_WARN, NULL, msg);
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, msg);
g_free(msg);
break;
default :
q++;
nread--;
break;
- }
+ }
}
/* Read from the capture file the number of records the child told us
it added.
XXX - do something if this fails? */
- switch (continue_tail_cap_file(cf, to_read, &err)) {
+ switch (cf_continue_tail(cf, to_read, &err)) {
case READ_SUCCESS:
case READ_ERROR:
case READ_ABORTED:
/* Kill the child capture process; the user wants to exit, and we
shouldn't just leave it running. */
-#ifdef _WIN32
- /* XXX - kill it. */
-#else
- kill(fork_child, SIGTERM); /* SIGTERM so it can clean up if necessary */
-#endif
+ kill_capture_child();
break;
}
- /* restore pipe handler */
-#ifdef _WIN32
- cap_timer_id = gtk_timeout_add(1000, cap_timer_cb, NULL);
-#else
- cap_input_id = gtk_input_add_full (sync_pipe[READ],
- GDK_INPUT_READ|GDK_INPUT_EXCEPTION,
- cap_file_input_cb,
- NULL,
- (gpointer) cf,
- NULL);
-#endif
+ return TRUE;
}
static void
-wait_for_child(gboolean always_report)
+sync_pipe_wait_for_child(gboolean always_report)
{
int wstatus;
#ifdef _WIN32
- /* XXX - analyze the wait stuatus and display more information
- in the dialog box? */
- if (_cwait(&wstatus, child_process, _WAIT_CHILD) == -1) {
- simple_dialog(ESD_TYPE_WARN, NULL, "Child capture process stopped unexpectedly");
+ /* XXX - analyze the wait status and display more information
+ in the dialog box?
+ XXX - set "fork_child" to -1 if we find it exited? */
+ if (_cwait(&wstatus, fork_child, _WAIT_CHILD) == -1) {
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+ "Child capture process stopped unexpectedly");
}
#else
if (wait(&wstatus) != -1) {
/* The child exited; display its exit status, if it's not zero,
and even if it's zero if "always_report" is true. */
if (always_report || WEXITSTATUS(wstatus) != 0) {
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Child capture process exited: exit status %d",
WEXITSTATUS(wstatus));
}
} else if (WIFSTOPPED(wstatus)) {
/* It stopped, rather than exiting. "Should not happen." */
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Child capture process stopped: %s",
- signame(WSTOPSIG(wstatus)));
+ sync_pipe_signame(WSTOPSIG(wstatus)));
} else if (WIFSIGNALED(wstatus)) {
/* It died with a signal. */
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Child capture process died: %s%s",
- signame(WTERMSIG(wstatus)),
+ sync_pipe_signame(WTERMSIG(wstatus)),
WCOREDUMP(wstatus) ? " - core dumped" : "");
} else {
/* What? It had to either have exited, or stopped, or died with
a signal; what happened here? */
- simple_dialog(ESD_TYPE_WARN, NULL,
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Child capture process died: wait status %#o", wstatus);
}
}
#endif
}
+static void
+sync_pipe_errmsg_to_parent(const char *errmsg)
+{
+ int msglen = strlen(errmsg);
+ char lenbuf[SP_DECISIZE+1+1];
+
+ sprintf(lenbuf, "%u%c", msglen, SP_ERROR_MSG);
+ write(1, lenbuf, strlen(lenbuf));
+ write(1, errmsg, msglen);
+}
+
+static void
+sync_pipe_drops_to_parent(int drops)
+{
+ char tmp[SP_DECISIZE+1+1];
+ sprintf(tmp, "%d%c", drops, SP_DROPS);
+ write(1, tmp, strlen(tmp));
+}
+
+static void
+sync_pipe_packet_count_to_parent(int packet_count)
+{
+ char tmp[SP_DECISIZE+1+1];
+ sprintf(tmp, "%d%c", packet_count, SP_PACKET_COUNT);
+ write(1, tmp, strlen(tmp));
+}
+
+static void
+sync_pipe_capstart_to_parent(void)
+{
+ static const char capstart_msg = SP_CAPSTART;
+
+ write(1, &capstart_msg, 1);
+}
+
#ifndef _WIN32
static char *
-signame(int sig)
+sync_pipe_signame(int sig)
{
char *sigmsg;
static char sigmsg_buf[6+1+3+1];
sigmsg = "Segmentation violation";
break;
- /* http://metalab.unc.edu/pub/Linux/docs/HOWTO/GCC-HOWTO
+ /* http://metalab.unc.edu/pub/Linux/docs/HOWTO/GCC-HOWTO
Linux is POSIX compliant. These are not POSIX-defined signals ---
ISO/IEC 9945-1:1990 (IEEE Std 1003.1-1990), paragraph B.3.3.1.1 sez:
}
#endif
-/*
- * Timeout, in milliseconds, for reads from the stream of captured packets.
- *
- * XXX - Michael Tuexen says MacOS X's BPF appears to be broken, in that
- * if you use a timeout of 250 in "pcap_open_live()", you don't see
- * packets until a large number of packets arrive; the timeout doesn't
- * cause a smaller number of packets to be delivered. Perhaps a timeout
- * that's less than 1 second acts like no timeout at all, so that you
- * don't see packets until the BPF buffer fills up?
- *
- * The workaround is to use a timeout of 1000 seconds on MacOS X.
- */
-#ifdef __APPLE__
-#define CAP_READ_TIMEOUT 1000
-#else
-#define CAP_READ_TIMEOUT 250
-#endif
-#ifndef _WIN32
-/* Take carre of byte order in the libpcap headers read from pipes.
- * (function taken from wiretap/libpcap.c) */
-static void
-adjust_header(loop_data *ld, struct pcap_hdr *hdr, struct pcaprec_hdr *rechdr)
-{
- if (ld->byte_swapped) {
- /* Byte-swap the record header fields. */
- rechdr->ts_sec = BSWAP32(rechdr->ts_sec);
- rechdr->ts_usec = BSWAP32(rechdr->ts_usec);
- rechdr->incl_len = BSWAP32(rechdr->incl_len);
- rechdr->orig_len = BSWAP32(rechdr->orig_len);
- }
- /* In file format version 2.3, the "incl_len" and "orig_len" fields were
- swapped, in order to match the BPF header layout.
- Unfortunately, some files were, according to a comment in the "libpcap"
- source, written with version 2.3 in their headers but without the
- interchanged fields, so if "incl_len" is greater than "orig_len" - which
- would make no sense - we assume that we need to swap them. */
- if (hdr->version_major == 2 &&
- (hdr->version_minor < 3 ||
- (hdr->version_minor == 3 && rechdr->incl_len > rechdr->orig_len))) {
- guint32 temp;
- temp = rechdr->orig_len;
- rechdr->orig_len = rechdr->incl_len;
- rechdr->incl_len = temp;
- }
-}
-/* Mimic pcap_open_live() for pipe captures
- * We check if "pipename" is "-" (stdin) or a FIFO, open it, and read the
- * header.
- * N.B. : we can't read the libpcap formats used in RedHat 6.1 or SuSE 6.3
- * because we can't seek on pipes (see wiretap/libpcap.c for details) */
-static int
-pipe_open_live(char *pipename, struct pcap_hdr *hdr, loop_data *ld, char *ebuf)
+static gboolean
+normal_do_capture(gboolean is_tempfile)
{
- struct stat pipe_stat;
- int fd;
- guint32 magic;
- int bytes_read, b;
-
- if (strcmp(pipename, "-") == 0) fd = 0; /* read from stdin */
- else if (stat(pipename, &pipe_stat) == 0 && S_ISFIFO(pipe_stat.st_mode)) {
- if ((fd = open(pipename, O_RDONLY)) == -1) return -1;
- } else return -1;
+ int capture_succeeded;
+ gboolean stats_known;
+ struct pcap_stat stats;
+ int err;
+
+ /* Not sync mode. */
+ capture_succeeded = capture(&stats_known, &stats);
+ if (quit_after_cap) {
+ /* DON'T unlink the save file. Presumably someone wants it. */
+ main_window_exit();
+ }
+ if (!capture_succeeded) {
+ /* We didn't succeed in doing the capture, so we don't have a save
+ file. */
+ if (capture_opts.multi_files_on) {
+ ringbuf_free();
+ } else {
+ g_free(cfile.save_file);
+ }
+ cfile.save_file = NULL;
+ return FALSE;
+ }
+ /* Capture succeeded; attempt to read in the capture file. */
+ if ((err = cf_open(cfile.save_file, is_tempfile, &cfile)) != 0) {
+ /* We're not doing a capture any more, so we don't have a save
+ file. */
+ if (capture_opts.multi_files_on) {
+ ringbuf_free();
+ } else {
+ g_free(cfile.save_file);
+ }
+ cfile.save_file = NULL;
+ return FALSE;
+ }
+
+ /* Set the read filter to NULL. */
+ cfile.rfcode = NULL;
+
+ /* Get the packet-drop statistics.
+
+ XXX - there are currently no packet-drop statistics stored
+ in libpcap captures, and that's what we're reading.
+
+ At some point, we will add support in Wiretap to return
+ packet-drop statistics for capture file formats that store it,
+ and will make "cf_read()" get those statistics from Wiretap.
+ We clear the statistics (marking them as "not known") in
+ "cf_open()", and "cf_read()" will only fetch them and mark
+ them as known if Wiretap supplies them, so if we get the
+ statistics now, after calling "cf_open()" but before calling
+ "cf_read()", the values we store will be used by "cf_read()".
+
+ If a future libpcap capture file format stores the statistics,
+ we'll put them into the capture file that we write, and will
+ thus not have to set them here - "cf_read()" will get them from
+ the file and use them. */
+ if (stats_known) {
+ cfile.drops_known = TRUE;
+
+ /* XXX - on some systems, libpcap doesn't bother filling in
+ "ps_ifdrop" - it doesn't even set it to zero - so we don't
+ bother looking at it.
+
+ Ideally, libpcap would have an interface that gave us
+ several statistics - perhaps including various interface
+ error statistics - and would tell us which of them it
+ supplies, allowing us to display only the ones it does. */
+ cfile.drops = stats.ps_drop;
+ }
+ switch (cf_read(&cfile)) {
+
+ case READ_SUCCESS:
+ case READ_ERROR:
+ /* Just because we got an error, that doesn't mean we were unable
+ to read any of the file; we handle what we could get from the
+ file. */
+ break;
+
+ case READ_ABORTED:
+ /* Exit by leaving the main loop, so that any quit functions
+ we registered get called. */
+ main_window_nested_quit();
+ return FALSE;
+ }
+
+ /* We're not doing a capture any more, so we don't have a save
+ file. */
+ if (capture_opts.multi_files_on) {
+ ringbuf_free();
+ } else {
+ g_free(cfile.save_file);
+ }
+ cfile.save_file = NULL;
+
+ /* if we didn't captured even a single packet, close the file again */
+ if(cfile.count == 0) {
+ simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+ "%sNo packets captured!%s\n\n"
+ "As no data was captured, closing the %scapture file!",
+ simple_dialog_primary_start(), simple_dialog_primary_end(),
+ (cfile.is_tempfile) ? "temporary " : "");
+ cf_close(&cfile);
+ }
+ return TRUE;
+}
+
+/*
+ * Timeout, in milliseconds, for reads from the stream of captured packets.
+ */
+#define CAP_READ_TIMEOUT 250
+
+#ifndef _WIN32
+/* Take care of byte order in the libpcap headers read from pipes.
+ * (function taken from wiretap/libpcap.c) */
+static void
+cap_pipe_adjust_header(loop_data *ld, struct pcap_hdr *hdr, struct pcaprec_hdr *rechdr)
+{
+ if (ld->byte_swapped) {
+ /* Byte-swap the record header fields. */
+ rechdr->ts_sec = BSWAP32(rechdr->ts_sec);
+ rechdr->ts_usec = BSWAP32(rechdr->ts_usec);
+ rechdr->incl_len = BSWAP32(rechdr->incl_len);
+ rechdr->orig_len = BSWAP32(rechdr->orig_len);
+ }
+
+ /* In file format version 2.3, the "incl_len" and "orig_len" fields were
+ swapped, in order to match the BPF header layout.
+
+ Unfortunately, some files were, according to a comment in the "libpcap"
+ source, written with version 2.3 in their headers but without the
+ interchanged fields, so if "incl_len" is greater than "orig_len" - which
+ would make no sense - we assume that we need to swap them. */
+ if (hdr->version_major == 2 &&
+ (hdr->version_minor < 3 ||
+ (hdr->version_minor == 3 && rechdr->incl_len > rechdr->orig_len))) {
+ guint32 temp;
+
+ temp = rechdr->orig_len;
+ rechdr->orig_len = rechdr->incl_len;
+ rechdr->incl_len = temp;
+ }
+}
+
+/* Mimic pcap_open_live() for pipe captures
+ * We check if "pipename" is "-" (stdin) or a FIFO, open it, and read the
+ * header.
+ * N.B. : we can't read the libpcap formats used in RedHat 6.1 or SuSE 6.3
+ * because we can't seek on pipes (see wiretap/libpcap.c for details) */
+static int
+cap_pipe_open_live(char *pipename, struct pcap_hdr *hdr, loop_data *ld,
+ char *errmsg, int errmsgl)
+{
+ struct stat pipe_stat;
+ int fd;
+ guint32 magic;
+ int b, sel_ret;
+ unsigned int bytes_read;
+ fd_set rfds;
+ struct timeval timeout;
+
+ /*
+ * XXX Ethereal blocks until we return
+ */
+ if (strcmp(pipename, "-") == 0)
+ fd = 0; /* read from stdin */
+ else {
+ if (stat(pipename, &pipe_stat) < 0) {
+ if (errno == ENOENT || errno == ENOTDIR)
+ ld->cap_pipe_err = PIPNEXIST;
+ else {
+ snprintf(errmsg, errmsgl,
+ "The capture session could not be initiated "
+ "due to error on pipe: %s", strerror(errno));
+ ld->cap_pipe_err = PIPERR;
+ }
+ return -1;
+ }
+ if (! S_ISFIFO(pipe_stat.st_mode)) {
+ if (S_ISCHR(pipe_stat.st_mode)) {
+ /*
+ * Assume the user specified an interface on a system where
+ * interfaces are in /dev. Pretend we haven't seen it.
+ */
+ ld->cap_pipe_err = PIPNEXIST;
+ } else {
+ snprintf(errmsg, errmsgl,
+ "The capture session could not be initiated because\n"
+ "\"%s\" is neither an interface nor a pipe", pipename);
+ ld->cap_pipe_err = PIPERR;
+ }
+ return -1;
+ }
+ fd = open(pipename, O_RDONLY | O_NONBLOCK);
+ if (fd == -1) {
+ snprintf(errmsg, errmsgl,
+ "The capture session could not be initiated "
+ "due to error on pipe open: %s", strerror(errno));
+ ld->cap_pipe_err = PIPERR;
+ return -1;
+ }
+ }
+
+ ld->from_cap_pipe = TRUE;
- ld->from_pipe = TRUE;
/* read the pcap header */
- if (read(fd, &magic, sizeof magic) != sizeof magic) {
- close(fd);
- return -1;
+ FD_ZERO(&rfds);
+ bytes_read = 0;
+ while (bytes_read < sizeof magic) {
+ FD_SET(fd, &rfds);
+ timeout.tv_sec = 0;
+ timeout.tv_usec = CAP_READ_TIMEOUT*1000;
+ sel_ret = select(fd+1, &rfds, NULL, NULL, &timeout);
+ if (sel_ret < 0) {
+ snprintf(errmsg, errmsgl,
+ "Unexpected error from select: %s", strerror(errno));
+ goto error;
+ } else if (sel_ret > 0) {
+ b = read(fd, ((char *)&magic)+bytes_read, sizeof magic-bytes_read);
+ if (b <= 0) {
+ if (b == 0)
+ snprintf(errmsg, errmsgl, "End of file on pipe during open");
+ else
+ snprintf(errmsg, errmsgl, "Error on pipe during open: %s",
+ strerror(errno));
+ goto error;
+ }
+ bytes_read += b;
+ }
}
switch (magic) {
break;
default:
/* Not a "libpcap" type we know about. */
- close(fd);
- return -1;
+ snprintf(errmsg, errmsgl, "Unrecognized libpcap format");
+ goto error;
}
/* Read the rest of the header */
- bytes_read = read(fd, hdr, sizeof(struct pcap_hdr));
- if (bytes_read <= 0) {
- close(fd);
- return -1;
- }
- while ((unsigned) bytes_read < sizeof(struct pcap_hdr))
- {
- b = read(fd, ((char *)&hdr)+bytes_read, sizeof(struct pcap_hdr) - bytes_read);
- if (b <= 0) {
- close(fd);
- return -1;
+ bytes_read = 0;
+ while (bytes_read < sizeof(struct pcap_hdr)) {
+ FD_SET(fd, &rfds);
+ timeout.tv_sec = 0;
+ timeout.tv_usec = CAP_READ_TIMEOUT*1000;
+ sel_ret = select(fd+1, &rfds, NULL, NULL, &timeout);
+ if (sel_ret < 0) {
+ snprintf(errmsg, errmsgl,
+ "Unexpected error from select: %s", strerror(errno));
+ goto error;
+ } else if (sel_ret > 0) {
+ b = read(fd, ((char *)hdr)+bytes_read,
+ sizeof(struct pcap_hdr) - bytes_read);
+ if (b <= 0) {
+ if (b == 0)
+ snprintf(errmsg, errmsgl, "End of file on pipe during open");
+ else
+ snprintf(errmsg, errmsgl, "Error on pipe during open: %s",
+ strerror(errno));
+ goto error;
+ }
+ bytes_read += b;
}
- bytes_read += b;
}
+
if (ld->byte_swapped) {
/* Byte-swap the header fields about which we care. */
hdr->version_major = BSWAP16(hdr->version_major);
hdr->snaplen = BSWAP32(hdr->snaplen);
hdr->network = BSWAP32(hdr->network);
}
+
if (hdr->version_major < 2) {
- close(fd);
- return -1;
+ snprintf(errmsg, errmsgl, "Unable to read old libpcap format");
+ goto error;
}
+ ld->cap_pipe_state = STATE_EXPECT_REC_HDR;
+ ld->cap_pipe_err = PIPOK;
return fd;
+
+error:
+ ld->cap_pipe_err = PIPERR;
+ close(fd);
+ return -1;
+
}
/* We read one record from the pipe, take care of byte order in the record
* header, write the record in the capture file, and update capture statistics. */
+
static int
-pipe_dispatch(int fd, loop_data *ld, struct pcap_hdr *hdr)
+cap_pipe_dispatch(int fd, loop_data *ld, struct pcap_hdr *hdr,
+ struct pcaprec_modified_hdr *rechdr, guchar *data,
+ char *errmsg, int errmsgl)
{
- struct wtap_pkthdr whdr;
- struct pcaprec_modified_hdr rechdr;
- int bytes_to_read, bytes_read, b;
- u_char pd[WTAP_MAX_PACKET_SIZE];
- int err;
-
- /* read the record header */
- bytes_to_read = ld->modified ? sizeof rechdr : sizeof rechdr.hdr;
- bytes_read = read(fd, &rechdr, bytes_to_read);
- if (bytes_read <= 0) {
- close(fd);
- ld->go = FALSE;
- return 0;
- }
- while (bytes_read < bytes_to_read)
- {
- b = read(fd, ((char *)&rechdr)+bytes_read, bytes_to_read - bytes_read);
+ struct pcap_pkthdr phdr;
+ int b;
+ enum { PD_REC_HDR_READ, PD_DATA_READ, PD_PIPE_EOF, PD_PIPE_ERR,
+ PD_ERR } result;
+
+ switch (ld->cap_pipe_state) {
+
+ case STATE_EXPECT_REC_HDR:
+ ld->bytes_to_read = ld->modified ?
+ sizeof(struct pcaprec_modified_hdr) : sizeof(struct pcaprec_hdr);
+ ld->bytes_read = 0;
+ ld->cap_pipe_state = STATE_READ_REC_HDR;
+ /* Fall through */
+
+ case STATE_READ_REC_HDR:
+ b = read(fd, ((char *)rechdr)+ld->bytes_read,
+ ld->bytes_to_read - ld->bytes_read);
if (b <= 0) {
- close(fd);
- ld->go = FALSE;
- return 0;
+ if (b == 0)
+ result = PD_PIPE_EOF;
+ else
+ result = PD_PIPE_ERR;
+ break;
}
- bytes_read += b;
- }
- /* take care of byte order */
- adjust_header(ld, hdr, &rechdr.hdr);
- if (rechdr.hdr.incl_len > WTAP_MAX_PACKET_SIZE) {
- close(fd);
- ld->go = FALSE;
- return 0;
- }
- /* read the packet data */
- bytes_read = read(fd, pd, rechdr.hdr.incl_len);
- if (bytes_read <= 0) {
- close(fd);
- ld->go = FALSE;
- return 0;
- }
- while ((unsigned) bytes_read < rechdr.hdr.incl_len)
- {
- b = read(fd, pd+bytes_read, rechdr.hdr.incl_len - bytes_read);
+ if ((ld->bytes_read += b) < ld->bytes_to_read)
+ return 0;
+ result = PD_REC_HDR_READ;
+ break;
+
+ case STATE_EXPECT_DATA:
+ ld->bytes_read = 0;
+ ld->cap_pipe_state = STATE_READ_DATA;
+ /* Fall through */
+
+ case STATE_READ_DATA:
+ b = read(fd, data+ld->bytes_read, rechdr->hdr.incl_len - ld->bytes_read);
if (b <= 0) {
- close(fd);
- ld->go = FALSE;
- return 0;
- }
- bytes_read += b;
- }
- /* dump the packet data to the capture file */
- whdr.ts.tv_sec = rechdr.hdr.ts_sec;
- whdr.ts.tv_usec = rechdr.hdr.ts_usec;
- whdr.caplen = rechdr.hdr.incl_len;
- whdr.len = rechdr.hdr.orig_len;
- whdr.pkt_encap = ld->linktype;
- wtap_dump(ld->pdh, &whdr, NULL, pd, &err);
-
- /* update capture statistics */
- switch (ld->linktype) {
- case WTAP_ENCAP_ETHERNET:
- capture_eth(pd, 0, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_FDDI:
- case WTAP_ENCAP_FDDI_BITSWAPPED:
- capture_fddi(pd, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_PRISM_HEADER:
- capture_prism(pd, 0, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_TOKEN_RING:
- capture_tr(pd, 0, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_NULL:
- capture_null(pd, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_PPP:
- capture_ppp_hdlc(pd, 0, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_RAW_IP:
- capture_raw(pd, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_LINUX_ATM_CLIP:
- capture_clip(pd, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_IEEE_802_11:
- capture_ieee80211(pd, 0, whdr.caplen, &ld->counts);
- break;
- case WTAP_ENCAP_CHDLC:
- capture_chdlc(pd, 0, whdr.caplen, &ld->counts);
+ if (b == 0)
+ result = PD_PIPE_EOF;
+ else
+ result = PD_PIPE_ERR;
break;
- case WTAP_ENCAP_LOCALTALK:
- capture_llap(pd, whdr.caplen, &ld->counts);
+ }
+ if ((ld->bytes_read += b) < rechdr->hdr.incl_len)
+ return 0;
+ result = PD_DATA_READ;
+ break;
+
+ default:
+ snprintf(errmsg, errmsgl, "cap_pipe_dispatch: invalid state");
+ result = PD_ERR;
+
+ } /* switch (ld->cap_pipe_state) */
+
+ /*
+ * We've now read as much data as we were expecting, so process it.
+ */
+ switch (result) {
+
+ case PD_REC_HDR_READ:
+ /* We've read the header. Take care of byte order. */
+ cap_pipe_adjust_header(ld, hdr, &rechdr->hdr);
+ if (rechdr->hdr.incl_len > WTAP_MAX_PACKET_SIZE) {
+ snprintf(errmsg, errmsgl, "Frame %u too long (%d bytes)",
+ ld->counts.total+1, rechdr->hdr.incl_len);
break;
- /* XXX - FreeBSD may append 4-byte ATM pseudo-header to DLT_ATM_RFC1483,
- with LLC header following; we should implement it at some
- point. */
+ }
+ ld->cap_pipe_state = STATE_EXPECT_DATA;
+ return 0;
+
+ case PD_DATA_READ:
+ /* Fill in a "struct pcap_pkthdr", and process the packet. */
+ phdr.ts.tv_sec = rechdr->hdr.ts_sec;
+ phdr.ts.tv_usec = rechdr->hdr.ts_usec;
+ phdr.caplen = rechdr->hdr.incl_len;
+ phdr.len = rechdr->hdr.orig_len;
+
+ capture_pcap_cb((guchar *)ld, &phdr, data);
+
+ ld->cap_pipe_state = STATE_EXPECT_REC_HDR;
+ return 1;
+
+ case PD_PIPE_EOF:
+ ld->cap_pipe_err = PIPEOF;
+ return -1;
+
+ case PD_PIPE_ERR:
+ snprintf(errmsg, errmsgl, "Error reading from pipe: %s",
+ strerror(errno));
+ /* Fall through */
+ case PD_ERR:
+ break;
}
- return 1;
+ ld->cap_pipe_err = PIPERR;
+ /* Return here rather than inside the switch to prevent GCC warning */
+ return -1;
}
-#endif
+#endif /* not _WIN32 */
/*
* This needs to be static, so that the SIGUSR1 handler can clear the "go"
int
capture(gboolean *stats_known, struct pcap_stat *stats)
{
- GtkWidget *cap_w, *main_vb, *stop_bt, *counts_tb;
pcap_t *pch;
int pcap_encap;
- int snaplen;
+ int file_snaplen;
gchar open_err_str[PCAP_ERRBUF_SIZE];
gchar lookup_net_err_str[PCAP_ERRBUF_SIZE];
- gchar label_str[64];
bpf_u_int32 netnum, netmask;
struct bpf_program fcode;
+ const char *set_linktype_err_str;
time_t upd_time, cur_time;
+ time_t start_time;
int err, inpkts;
- condition *cnd_stop_capturesize;
- condition *cnd_stop_timeout;
- unsigned int i;
- static const char capstart_msg = SP_CAPSTART;
+ condition *cnd_file_duration = NULL;
+ condition *cnd_autostop_files = NULL;
+ condition *cnd_autostop_size = NULL;
+ condition *cnd_autostop_duration = NULL;
+ guint32 autostop_files = 0;
char errmsg[4096+1];
- gboolean dump_ok;
-#ifndef _WIN32
+ gboolean write_ok;
+ gboolean close_ok;
+ capture_info capture_ui;
+
+#ifdef _WIN32
+ WORD wVersionRequested;
+ WSADATA wsaData;
+#else
+ fd_set set1;
+ struct timeval timeout;
static const char ppamsg[] = "can't find PPA for ";
char *libpcap_warn;
+ int sel_ret;
+ int pipe_fd = -1;
+ struct pcap_hdr hdr;
+ struct pcaprec_modified_hdr rechdr;
+ guchar pcap_data[WTAP_MAX_PACKET_SIZE];
#endif
- fd_set set1;
- struct timeval timeout;
#ifdef MUST_DO_SELECT
int pcap_fd = 0;
#endif
-#ifdef _WIN32
- WORD wVersionRequested;
- WSADATA wsaData;
-#endif
-#ifndef _WIN32
- int pipe_fd = -1;
- struct pcap_hdr hdr;
-#endif
- struct {
- const gchar *title;
- gint *value_ptr;
- GtkWidget *label, *value, *percent;
- } counts[] = {
- { "Total", &ld.counts.total, NULL, NULL, NULL },
- { "SCTP", &ld.counts.sctp, NULL, NULL, NULL },
- { "TCP", &ld.counts.tcp, NULL, NULL, NULL },
- { "UDP", &ld.counts.udp, NULL, NULL, NULL },
- { "ICMP", &ld.counts.icmp, NULL, NULL, NULL },
- { "OSPF", &ld.counts.ospf, NULL, NULL, NULL },
- { "GRE", &ld.counts.gre, NULL, NULL, NULL },
- { "NetBIOS", &ld.counts.netbios, NULL, NULL, NULL },
- { "IPX", &ld.counts.ipx, NULL, NULL, NULL },
- { "VINES", &ld.counts.vines, NULL, NULL, NULL },
- { "Other", &ld.counts.other, NULL, NULL, NULL }
- };
-
-#define N_COUNTS (sizeof counts / sizeof counts[0])
-
- /* Initialize Windows Socket if we are in a WIN32 OS
+ gboolean show_info = capture_opts.show_info || !capture_opts.sync_mode;
+
+ /* Initialize Windows Socket if we are in a WIN32 OS
This needs to be done before querying the interface for network/netmask */
-#ifdef _WIN32
- wVersionRequested = MAKEWORD( 1, 1 );
- err = WSAStartup( wVersionRequested, &wsaData );
- if (err!=0) {
- snprintf(errmsg, sizeof errmsg,
- "Couldn't initialize Windows Sockets.");
- pch=NULL;
- goto error;
- }
-#endif
+#ifdef _WIN32
+ /* XXX - do we really require 1.1 or earlier?
+ Are there any versions that support only 2.0 or higher? */
+ wVersionRequested = MAKEWORD(1, 1);
+ err = WSAStartup(wVersionRequested, &wsaData);
+ if (err != 0) {
+ switch (err) {
+
+ case WSASYSNOTREADY:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: Network system not ready for network communication");
+ break;
+
+ case WSAVERNOTSUPPORTED:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: Windows Sockets version %u.%u not supported",
+ LOBYTE(wVersionRequested), HIBYTE(wVersionRequested));
+ break;
+
+ case WSAEINPROGRESS:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: Blocking operation is in progress");
+ break;
+
+ case WSAEPROCLIM:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: Limit on the number of tasks supported by this WinSock implementation has been reached");
+ break;
+
+ case WSAEFAULT:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: Bad pointer passed to WSAStartup");
+ break;
+
+ default:
+ snprintf(errmsg, sizeof errmsg,
+ "Couldn't initialize Windows Sockets: error %d", err);
+ break;
+ }
+ pch = NULL;
+ goto error;
+ }
+#endif
ld.go = TRUE;
ld.counts.total = 0;
- ld.max = cfile.count;
+ if (capture_opts.has_autostop_packets)
+ ld.max = capture_opts.autostop_packets;
+ else
+ ld.max = 0; /* no limit */
ld.err = 0; /* no error seen yet */
ld.linktype = WTAP_ENCAP_UNKNOWN;
ld.pcap_err = FALSE;
- ld.from_pipe = FALSE;
+ ld.from_cap_pipe = FALSE;
ld.sync_packets = 0;
ld.counts.sctp = 0;
ld.counts.tcp = 0;
ld.counts.netbios = 0;
ld.counts.vines = 0;
ld.counts.other = 0;
+ ld.counts.arp = 0;
ld.pdh = NULL;
/* We haven't yet gotten the capture statistics. */
if they succeed; to tell if that's happened, we have to clear
the error buffer, and check if it's still a null string. */
open_err_str[0] = '\0';
- pch = pcap_open_live(cfile.iface, cfile.snap, promisc_mode,
- CAP_READ_TIMEOUT, open_err_str);
+ pch = pcap_open_live(cfile.iface,
+ capture_opts.has_snaplen ? capture_opts.snaplen :
+ WTAP_MAX_PACKET_SIZE,
+ capture_opts.promisc_mode, CAP_READ_TIMEOUT,
+ open_err_str);
+
+ if (pch != NULL) {
+#ifdef _WIN32
+ /* try to set the capture buffer size */
+ if (pcap_setbuff(pch, capture_opts.buffer_size * 1024 * 1024) != 0) {
+ simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+ "%sCouldn't set the capture buffer size!%s\n"
+ "\n"
+ "The capture buffer size of %luMB seems to be too high for your machine,\n"
+ "the default of 1MB will be used.\n"
+ "\n"
+ "Nonetheless, the capture is started.\n",
+ simple_dialog_primary_start(), simple_dialog_primary_end(), capture_opts.buffer_size);
+ }
+#endif
- if (pch == NULL) {
+ /* setting the data link type only works on real interfaces */
+ if (capture_opts.linktype != -1) {
+ set_linktype_err_str = set_pcap_linktype(pch, cfile.iface,
+ capture_opts.linktype);
+ if (set_linktype_err_str != NULL) {
+ snprintf(errmsg, sizeof errmsg, "Unable to set data link type (%s).",
+ set_linktype_err_str);
+ goto error;
+ }
+ }
+ } else {
+ /* We couldn't open "cfile.iface" as a network device. */
#ifdef _WIN32
- /* Well, we couldn't start the capture.
+ /* On Windows, we don't support capturing on pipes, so we give up.
If this is a child process that does the capturing in sync
mode or fork mode, it shouldn't do any UI stuff until we pop up the
capture-progress window, and, since we couldn't start the
capture, we haven't popped it up. */
if (!capture_child) {
- while (gtk_events_pending()) gtk_main_iteration();
+ main_window_update();
}
/* On Win32 OSes, the capture devices are probably available to all
"The capture session could not be initiated (%s).\n"
"Please check that you have the proper interface specified.\n"
"\n"
- "Note that the driver Ethereal uses for packet capture on Windows\n"
- "doesn't support capturing on PPP/WAN interfaces in Windows NT/2000.\n",
+ "Note that the WinPcap 2.x version of the driver Ethereal uses for packet\n"
+ "capture on Windows doesn't support capturing on PPP/WAN interfaces in\n"
+ "Windows NT/2000/XP/2003 Server, and that the WinPcap 3.0 and later versions\n"
+ "don't support capturing on PPP/WAN interfaces at all.",
open_err_str);
goto error;
#else
/* try to open cfile.iface as a pipe */
- pipe_fd = pipe_open_live(cfile.iface, &hdr, &ld, open_err_str);
+ pipe_fd = cap_pipe_open_live(cfile.iface, &hdr, &ld, errmsg, sizeof errmsg);
if (pipe_fd == -1) {
- /* Well, we couldn't start the capture.
- If this is a child process that does the capturing in sync
- mode or fork mode, it shouldn't do any UI stuff until we pop up the
- capture-progress window, and, since we couldn't start the
- capture, we haven't popped it up. */
+
+ /* If this is a child process that does the capturing in sync
+ * mode or fork mode, it shouldn't do any UI stuff until we pop up the
+ * capture-progress window, and, since we couldn't start the
+ * capture, we haven't popped it up.
+ */
if (!capture_child) {
- while (gtk_events_pending()) gtk_main_iteration();
+ main_window_update();
}
- /* If we got a "can't find PPA for XXX" message, warn the user (who
- is running Ethereal on HP-UX) that they don't have a version
- of libpcap that properly handles HP-UX (libpcap 0.6.x and later
- versions, which properly handle HP-UX, say "can't find /dev/dlpi
- PPA for XXX" rather than "can't find PPA for XXX"). */
- if (strncmp(open_err_str, ppamsg, sizeof ppamsg - 1) == 0)
- libpcap_warn =
- "\n\n"
- "You are running Ethereal with a version of the libpcap library\n"
- "that doesn't handle HP-UX network devices well; this means that\n"
- "Ethereal may not be able to capture packets.\n"
- "\n"
- "To fix this, you should install libpcap 0.6.2, or a later version\n"
- "of libpcap, rather than libpcap 0.4 or 0.5.x. It is available in\n"
- "packaged binary form from the Software Porting And Archive Centre\n"
- "for HP-UX; the Centre is at http://hpux.connect.org.uk/ - the page\n"
- "at the URL lists a number of mirror sites.";
- else
- libpcap_warn = "";
- snprintf(errmsg, sizeof errmsg,
+ if (ld.cap_pipe_err == PIPNEXIST) {
+ /* Pipe doesn't exist, so output message for interface */
+
+ /* If we got a "can't find PPA for XXX" message, warn the user (who
+ is running Ethereal on HP-UX) that they don't have a version
+ of libpcap that properly handles HP-UX (libpcap 0.6.x and later
+ versions, which properly handle HP-UX, say "can't find /dev/dlpi
+ PPA for XXX" rather than "can't find PPA for XXX"). */
+ if (strncmp(open_err_str, ppamsg, sizeof ppamsg - 1) == 0)
+ libpcap_warn =
+ "\n\n"
+ "You are running Ethereal with a version of the libpcap library\n"
+ "that doesn't handle HP-UX network devices well; this means that\n"
+ "Ethereal may not be able to capture packets.\n"
+ "\n"
+ "To fix this, you should install libpcap 0.6.2, or a later version\n"
+ "of libpcap, rather than libpcap 0.4 or 0.5.x. It is available in\n"
+ "packaged binary form from the Software Porting And Archive Centre\n"
+ "for HP-UX; the Centre is at http://hpux.connect.org.uk/ - the page\n"
+ "at the URL lists a number of mirror sites.";
+ else
+ libpcap_warn = "";
+ snprintf(errmsg, sizeof errmsg,
"The capture session could not be initiated (%s).\n"
"Please check to make sure you have sufficient permissions, and that\n"
"you have the proper interface or pipe specified.%s", open_err_str,
libpcap_warn);
+ }
+ /*
+ * Else pipe (or file) does exist and cap_pipe_open_live() has
+ * filled in errmsg
+ */
goto error;
- }
+ } else
+ /* cap_pipe_open_live() succeeded; don't want
+ error message from pcap_open_live() */
+ open_err_str[0] = '\0';
#endif
}
/* capture filters only work on real interfaces */
- if (cfile.cfilter && !ld.from_pipe) {
+ if (cfile.cfilter && !ld.from_cap_pipe) {
/* A capture filter was specified; set it up. */
if (pcap_lookupnet(cfile.iface, &netnum, &netmask, lookup_net_err_str) < 0) {
/*
netmask = 0;
}
if (pcap_compile(pch, &fcode, cfile.cfilter, 1, netmask) < 0) {
- snprintf(errmsg, sizeof errmsg, "Unable to parse filter string (%s).",
- pcap_geterr(pch));
+ dfilter_t *rfcode = NULL;
+ /* filter string invalid, did the user tried a display filter? */
+ if (dfilter_compile(cfile.cfilter, &rfcode) && rfcode != NULL) {
+ snprintf(errmsg, sizeof errmsg,
+ "%sInvalid capture filter: \"%s\"!%s\n"
+ "\n"
+ "That string looks like a valid display filter; however, it is not a valid\n"
+ "capture filter (%s).\n"
+ "\n"
+ "Note that display filters and capture filters don't have the same syntax,\n"
+ "so you can't use most display filter expressions as capture filters.\n"
+ "\n"
+ "See the help for a description of the capture filter syntax.",
+ simple_dialog_primary_start(), cfile.cfilter, simple_dialog_primary_end(),
+ pcap_geterr(pch));
+ dfilter_free(rfcode);
+ } else {
+ snprintf(errmsg, sizeof errmsg,
+ "%sInvalid capture filter: \"%s\"!%s\n"
+ "\n"
+ "That string is not a valid capture filter (%s).\n"
+ "See the help for a description of the capture filter syntax.",
+ simple_dialog_primary_start(), cfile.cfilter, simple_dialog_primary_end(),
+ pcap_geterr(pch));
+ }
goto error;
}
if (pcap_setfilter(pch, &fcode) < 0) {
/* Set up to write to the capture file. */
#ifndef _WIN32
- if (ld.from_pipe) {
+ if (ld.from_cap_pipe) {
pcap_encap = hdr.network;
- snaplen = hdr.snaplen;
+ file_snaplen = hdr.snaplen;
} else
#endif
{
pcap_encap = get_pcap_linktype(pch, cfile.iface);
- snaplen = pcap_snapshot(pch);
+ file_snaplen = pcap_snapshot(pch);
}
ld.linktype = wtap_pcap_encap_to_wtap_encap(pcap_encap);
if (ld.linktype == WTAP_ENCAP_UNKNOWN) {
" that Ethereal doesn't support (data link type %d).", pcap_encap);
goto error;
}
- if (cfile.ringbuffer_on) {
- ld.pdh = ringbuf_init_wtap_dump_fdopen(WTAP_FILE_PCAP, ld.linktype,
- snaplen, &err);
+ if (capture_opts.multi_files_on) {
+ ld.pdh = ringbuf_init_wtap_dump_fdopen(WTAP_FILE_PCAP, ld.linktype,
+ file_snaplen, &err);
} else {
ld.pdh = wtap_dump_fdopen(cfile.save_file_fd, WTAP_FILE_PCAP,
- ld.linktype, snaplen, &err);
+ ld.linktype, file_snaplen, &err);
}
if (ld.pdh == NULL) {
update its windows to indicate that we have a live capture in
progress. */
fflush(wtap_dump_file(ld.pdh));
- write(1, &capstart_msg, 1);
+ sync_pipe_capstart_to_parent();
}
- cap_w = gtk_window_new(GTK_WINDOW_TOPLEVEL);
- gtk_window_set_title(GTK_WINDOW(cap_w), "Ethereal: Capture");
- gtk_window_set_modal(GTK_WINDOW(cap_w), TRUE);
-
- /* Container for capture display widgets */
- main_vb = gtk_vbox_new(FALSE, 1);
- gtk_container_border_width(GTK_CONTAINER(main_vb), 5);
- gtk_container_add(GTK_CONTAINER(cap_w), main_vb);
- gtk_widget_show(main_vb);
-
- /* Individual statistic elements */
- counts_tb = gtk_table_new(N_COUNTS, 3, TRUE);
- gtk_box_pack_start(GTK_BOX(main_vb), counts_tb, TRUE, TRUE, 3);
- gtk_widget_show(counts_tb);
-
- for (i = 0; i < N_COUNTS; i++) {
- counts[i].label = gtk_label_new(counts[i].title);
- gtk_misc_set_alignment(GTK_MISC(counts[i].label), 0.0f, 0.0f);
-
- counts[i].value = gtk_label_new("0");
- gtk_misc_set_alignment(GTK_MISC(counts[i].value), 0.0f, 0.0f);
-
- counts[i].percent = gtk_label_new("0.0%");
- gtk_misc_set_alignment(GTK_MISC(counts[i].percent), 0.0f, 0.0f);
-
- gtk_table_attach_defaults(GTK_TABLE(counts_tb),
- counts[i].label, 0, 1, i, i + 1);
-
- gtk_table_attach(GTK_TABLE(counts_tb),
- counts[i].value,
- 1, 2, i, i + 1, 0, 0, 5, 0);
-
- gtk_table_attach_defaults(GTK_TABLE(counts_tb),
- counts[i].percent, 2, 3, i, i + 1);
-
- gtk_widget_show(counts[i].label);
- gtk_widget_show(counts[i].value);
- gtk_widget_show(counts[i].percent);
+ /* start capture info dialog */
+ if(show_info) {
+ capture_ui.callback_data = &ld;
+ capture_ui.counts = &ld.counts;
+ capture_info_create(&capture_ui, cfile.iface);
}
- /* allow user to either click a stop button, or the close button on
- the window to stop a capture in progress. */
- stop_bt = gtk_button_new_with_label ("Stop");
- gtk_signal_connect(GTK_OBJECT(stop_bt), "clicked",
- GTK_SIGNAL_FUNC(capture_stop_cb), (gpointer) &ld);
- gtk_signal_connect(GTK_OBJECT(cap_w), "delete_event",
- GTK_SIGNAL_FUNC(capture_delete_cb), (gpointer) &ld);
- gtk_box_pack_end(GTK_BOX(main_vb), stop_bt, FALSE, FALSE, 3);
- GTK_WIDGET_SET_FLAGS(stop_bt, GTK_CAN_DEFAULT);
- gtk_widget_grab_default(stop_bt);
- GTK_WIDGET_SET_FLAGS(stop_bt, GTK_CAN_DEFAULT);
- gtk_widget_grab_default(stop_bt);
- gtk_widget_show(stop_bt);
-
- gtk_widget_show(cap_w);
-
+ start_time = time(NULL);
upd_time = time(NULL);
#ifdef MUST_DO_SELECT
- if (!ld.from_pipe) pcap_fd = pcap_fileno(pch);
+ if (!ld.from_cap_pipe) pcap_fd = pcap_fileno(pch);
#endif
#ifndef _WIN32
* Catch SIGUSR1, so that we exit cleanly if the parent process
* kills us with it due to the user selecting "Capture->Stop".
*/
- signal(SIGUSR1, stop_capture);
+ if (capture_child)
+ signal(SIGUSR1, stop_capture_signal_handler);
#endif
- /* initialize capture stop conditions */
+
+ /* initialize capture stop conditions */
init_capture_stop_conditions();
/* create stop conditions */
- cnd_stop_capturesize =
- cnd_new(CND_CLASS_CAPTURESIZE,(long)cfile.autostop_filesize * 1000);
- cnd_stop_timeout =
- cnd_new(CND_CLASS_TIMEOUT,(gint32)cfile.autostop_duration);
+ if (capture_opts.has_autostop_filesize)
+ cnd_autostop_size =
+ cnd_new(CND_CLASS_CAPTURESIZE,(long)capture_opts.autostop_filesize);
+ if (capture_opts.has_autostop_duration)
+ cnd_autostop_duration =
+ cnd_new(CND_CLASS_TIMEOUT,(gint32)capture_opts.autostop_duration);
+
+ if (capture_opts.multi_files_on) {
+ if (capture_opts.has_file_duration)
+ cnd_file_duration =
+ cnd_new(CND_CLASS_TIMEOUT, capture_opts.file_duration);
+
+ if (capture_opts.has_autostop_files)
+ cnd_autostop_files =
+ cnd_new(CND_CLASS_CAPTURESIZE, capture_opts.autostop_files);
+ }
+ /* WOW, everything is prepared! */
+ /* please fasten your seat belts, we will enter now the actual capture loop */
while (ld.go) {
- while (gtk_events_pending()) gtk_main_iteration();
+ main_window_update();
#ifndef _WIN32
- if (ld.from_pipe) {
+ if (ld.from_cap_pipe) {
FD_ZERO(&set1);
FD_SET(pipe_fd, &set1);
timeout.tv_sec = 0;
timeout.tv_usec = CAP_READ_TIMEOUT*1000;
- if (select(pipe_fd+1, &set1, NULL, NULL, &timeout) != 0) {
+ sel_ret = select(pipe_fd+1, &set1, NULL, NULL, &timeout);
+ if (sel_ret <= 0) {
+ inpkts = 0;
+ if (sel_ret < 0 && errno != EINTR) {
+ snprintf(errmsg, sizeof(errmsg),
+ "Unexpected error from select: %s", strerror(errno));
+ popup_errmsg(errmsg);
+ ld.go = FALSE;
+ }
+ } else {
/*
- * "select()" says we can read from the pipe without blocking; go for
- * it. We are not sure we can read a whole record, but at least the
- * begninning of one. pipe_dispatch() will block reading the whole
- * record.
+ * "select()" says we can read from the pipe without blocking
*/
- inpkts = pipe_dispatch(pipe_fd, &ld, &hdr);
- } else
- inpkts = 0;
+ inpkts = cap_pipe_dispatch(pipe_fd, &ld, &hdr, &rechdr, pcap_data,
+ errmsg, sizeof errmsg);
+ if (inpkts < 0) {
+ ld.go = FALSE;
+ }
+ }
}
else
-#endif
+#endif /* _WIN32 */
{
#ifdef MUST_DO_SELECT
/*
FD_SET(pcap_fd, &set1);
timeout.tv_sec = 0;
timeout.tv_usec = CAP_READ_TIMEOUT*1000;
- if (select(pcap_fd+1, &set1, NULL, NULL, &timeout) != 0) {
+ sel_ret = select(pcap_fd+1, &set1, NULL, NULL, &timeout);
+ if (sel_ret > 0) {
/*
* "select()" says we can read from it without blocking; go for
* it.
*/
- inpkts = pcap_dispatch(pch, 1, capture_pcap_cb, (u_char *) &ld);
+ inpkts = pcap_dispatch(pch, 1, capture_pcap_cb, (guchar *) &ld);
if (inpkts < 0) {
ld.pcap_err = TRUE;
ld.go = FALSE;
}
- } else
- inpkts = 0;
+ } else {
+ inpkts = 0;
+ if (sel_ret < 0 && errno != EINTR) {
+ snprintf(errmsg, sizeof(errmsg),
+ "Unexpected error from select: %s", strerror(errno));
+ popup_errmsg(errmsg);
+ ld.go = FALSE;
+ }
+ }
#else
- inpkts = pcap_dispatch(pch, 1, capture_pcap_cb, (u_char *) &ld);
+ inpkts = pcap_dispatch(pch, 1, capture_pcap_cb, (guchar *) &ld);
if (inpkts < 0) {
ld.pcap_err = TRUE;
ld.go = FALSE;
}
-#endif
+#endif /* MUST_DO_SELECT */
}
- if (inpkts > 0)
+
+ if (inpkts > 0) {
ld.sync_packets += inpkts;
- /* check capture stop conditons */
- if (cnd_eval(cnd_stop_timeout) == TRUE) {
- /* The specified capture time has elapsed; stop the capture. */
- ld.go = FALSE;
- } else if ((cnd_eval(cnd_stop_capturesize,
- (guint32)wtap_get_bytes_dumped(ld.pdh))) == TRUE){
- /* Capture file reached its maximum size. */
- if (cfile.ringbuffer_on) {
- /* Switch to the next ringbuffer file */
- if (ringbuf_switch_file(&cfile, &ld.pdh, &ld.err)) {
- /* File switch succeeded: reset the condition */
- cnd_reset(cnd_stop_capturesize);
+
+ /* check capture size condition */
+ if (cnd_autostop_size != NULL && cnd_eval(cnd_autostop_size,
+ (guint32)wtap_get_bytes_dumped(ld.pdh))){
+ /* Capture size limit reached, do we have another file? */
+ if (capture_opts.multi_files_on) {
+ if (cnd_autostop_files != NULL && cnd_eval(cnd_autostop_files, ++autostop_files)) {
+ /* no files left: stop here */
+ ld.go = FALSE;
+ continue;
+ }
+
+ /* Switch to the next ringbuffer file */
+ if (ringbuf_switch_file(&cfile, &ld.pdh, &ld.err)) {
+ /* File switch succeeded: reset the conditions */
+ cnd_reset(cnd_autostop_size);
+ if (cnd_file_duration) {
+ cnd_reset(cnd_file_duration);
+ }
+ } else {
+ /* File switch failed: stop here */
+ ld.go = FALSE;
+ continue;
+ }
} else {
- /* File switch failed: stop here */
+ /* single file, stop now */
ld.go = FALSE;
continue;
}
- } else {
- /* no ringbuffer - just stop */
- ld.go = FALSE;
- }
+ } /* cnd_autostop_size */
}
+
/* Only update once a second so as not to overload slow displays */
cur_time = time(NULL);
if (cur_time > upd_time) {
upd_time = cur_time;
- for (i = 0; i < N_COUNTS; i++) {
- snprintf(label_str, sizeof(label_str), "%d",
- *counts[i].value_ptr);
+ /*if (pcap_stats(pch, stats) >= 0) {
+ *stats_known = TRUE;
+ }*/
- gtk_label_set(GTK_LABEL(counts[i].value), label_str);
+ /* Let the parent process know. */
+ /* calculate and display running time */
+ if(show_info) {
+ cur_time -= start_time;
+ capture_ui.running_time = cur_time;
+ capture_ui.new_packets = ld.sync_packets;
+ capture_info_update(&capture_ui);
+ }
- snprintf(label_str, sizeof(label_str), "(%.1f%%)",
- pct(*counts[i].value_ptr, ld.counts.total));
+ if (ld.sync_packets) {
+ /* do sync here */
+ fflush(wtap_dump_file(ld.pdh));
+
+ if (capture_child) {
+ /* This is the child process for a sync mode capture, so send
+ our parent a message saying we've written out "ld.sync_packets"
+ packets to the capture file. */
+ sync_pipe_packet_count_to_parent(ld.sync_packets);
+ }
- gtk_label_set(GTK_LABEL(counts[i].percent), label_str);
+ ld.sync_packets = 0;
}
- /* do sync here, too */
- fflush(wtap_dump_file(ld.pdh));
- if (capture_child && ld.sync_packets) {
- /* This is the child process for a sync mode capture, so send
- our parent a message saying we've written out "ld.sync_packets"
- packets to the capture file. */
- char tmp[20];
- sprintf(tmp, "%d%c", ld.sync_packets, SP_PACKET_COUNT);
- write(1, tmp, strlen(tmp));
- ld.sync_packets = 0;
+ /* check capture duration condition */
+ if (cnd_autostop_duration != NULL && cnd_eval(cnd_autostop_duration)) {
+ /* The maximum capture time has elapsed; stop the capture. */
+ ld.go = FALSE;
+ continue;
}
+
+ /* check capture file duration condition */
+ if (cnd_file_duration != NULL && cnd_eval(cnd_file_duration)) {
+ /* duration limit reached, do we have another file? */
+ if (capture_opts.multi_files_on) {
+ if (cnd_autostop_files != NULL && cnd_eval(cnd_autostop_files, ++autostop_files)) {
+ /* no files left: stop here */
+ ld.go = FALSE;
+ continue;
+ }
+
+ /* Switch to the next ringbuffer file */
+ if (ringbuf_switch_file(&cfile, &ld.pdh, &ld.err)) {
+ /* file switch succeeded: reset the conditions */
+ cnd_reset(cnd_file_duration);
+ if(cnd_autostop_size)
+ cnd_reset(cnd_autostop_size);
+ } else {
+ /* File switch failed: stop here */
+ ld.go = FALSE;
+ continue;
+ }
+ } else {
+ /* single file, stop now */
+ ld.go = FALSE;
+ continue;
+ }
+ } /* cnd_file_duration */
}
- }
-
+
+ } /* while (ld.go) */
+
/* delete stop conditions */
- cnd_delete(cnd_stop_capturesize);
- cnd_delete(cnd_stop_timeout);
+ if (cnd_file_duration != NULL)
+ cnd_delete(cnd_file_duration);
+ if (cnd_autostop_files != NULL)
+ cnd_delete(cnd_autostop_files);
+ if (cnd_autostop_size != NULL)
+ cnd_delete(cnd_autostop_size);
+ if (cnd_autostop_duration != NULL)
+ cnd_delete(cnd_autostop_duration);
if (ld.pcap_err) {
snprintf(errmsg, sizeof(errmsg), "Error while capturing packets: %s",
pcap_geterr(pch));
- if (capture_child) {
- /* Tell the parent, so that they can pop up the message;
- we're going to exit, so if we try to pop it up, either
- it won't pop up or it'll disappear as soon as we exit. */
- send_errmsg_to_parent(errmsg);
- } else {
- /* Just pop up the message ourselves. */
- simple_dialog(ESD_TYPE_WARN, NULL, "%s", errmsg);
- }
+ popup_errmsg(errmsg);
+#ifdef _WIN32
}
+#else
+ } else if (ld.from_cap_pipe && ld.cap_pipe_err == PIPERR)
+ popup_errmsg(errmsg);
+#endif
- if (ld.err != 0) {
+ if (ld.err == 0)
+ write_ok = TRUE;
+ else {
get_capture_file_io_error(errmsg, sizeof(errmsg), cfile.save_file, ld.err,
FALSE);
- if (capture_child) {
- /* Tell the parent, so that they can pop up the message;
- we're going to exit, so if we try to pop it up, either
- it won't pop up or it'll disappear as soon as we exit. */
- send_errmsg_to_parent(errmsg);
- } else {
- /* Just pop up the message ourselves. */
- simple_dialog(ESD_TYPE_WARN, NULL, "%s", errmsg);
- }
+ popup_errmsg(errmsg);
+ write_ok = FALSE;
+ }
- /* A write failed, so we've already told the user there's a problem;
- if the close fails, there's no point in telling them about that
- as well. */
- if (cfile.ringbuffer_on) {
- ringbuf_wtap_dump_close(&cfile, &err);
- } else {
- wtap_dump_close(ld.pdh, &err);
- }
- } else {
- if (cfile.ringbuffer_on) {
- dump_ok = ringbuf_wtap_dump_close(&cfile, &err);
- } else {
- dump_ok = wtap_dump_close(ld.pdh, &err);
- }
- if (!dump_ok) {
- get_capture_file_io_error(errmsg, sizeof(errmsg), cfile.save_file, err,
- TRUE);
- if (capture_child) {
- /* Tell the parent, so that they can pop up the message;
- we're going to exit, so if we try to pop it up, either
- it won't pop up or it'll disappear as soon as we exit. */
- send_errmsg_to_parent(errmsg);
- } else {
- /* Just pop up the message ourselves. */
- simple_dialog(ESD_TYPE_WARN, NULL, "%s", errmsg);
- }
- }
+ if (capture_opts.multi_files_on) {
+ close_ok = ringbuf_wtap_dump_close(&cfile, &err);
+ } else {
+ close_ok = wtap_dump_close(ld.pdh, &err);
+ }
+ /* If we've displayed a message about a write error, there's no point
+ in displaying another message about an error on close. */
+ if (!close_ok && write_ok) {
+ get_capture_file_io_error(errmsg, sizeof(errmsg), cfile.save_file, err,
+ TRUE);
+ popup_errmsg(errmsg);
}
+ /* Set write_ok to mean the write and the close were successful. */
+ write_ok = (write_ok && close_ok);
+
#ifndef _WIN32
- if (ld.from_pipe)
+ /*
+ * XXX We exhibit different behaviour between normal mode and sync mode
+ * when the pipe is stdin and not already at EOF. If we're a child, the
+ * parent's stdin isn't closed, so if the user starts another capture,
+ * cap_pipe_open_live() will very likely not see the expected magic bytes and
+ * will say "Unrecognized libpcap format". On the other hand, in normal
+ * mode, cap_pipe_open_live() will say "End of file on pipe during open".
+ */
+ if (ld.from_cap_pipe && pipe_fd >= 0)
close(pipe_fd);
else
#endif
*stats_known = TRUE;
if (capture_child) {
/* Let the parent process know. */
- char tmp[20];
- sprintf(tmp, "%d%c", stats->ps_drop, SP_DROPS);
- write(1, tmp, strlen(tmp));
+ sync_pipe_drops_to_parent(stats->ps_drop);
}
} else {
snprintf(errmsg, sizeof(errmsg),
"Can't get packet-drop statistics: %s",
pcap_geterr(pch));
- if (capture_child) {
- /* Tell the parent, so that they can pop up the message;
- we're going to exit, so if we try to pop it up, either
- it won't pop up or it'll disappear as soon as we exit. */
- send_errmsg_to_parent(errmsg);
- } else {
- /* Just pop up the message ourselves. */
- simple_dialog(ESD_TYPE_WARN, NULL, "%s", errmsg);
- }
+ popup_errmsg(errmsg);
}
pcap_close(pch);
}
-#ifdef WIN32
+#ifdef _WIN32
/* Shut down windows sockets */
WSACleanup();
#endif
- gtk_grab_remove(GTK_WIDGET(cap_w));
- gtk_widget_destroy(GTK_WIDGET(cap_w));
+ if(show_info) {
+ capture_info_destroy(&capture_ui);
+ }
- return TRUE;
+ return write_ok;
error:
- if (cfile.ringbuffer_on) {
+ if (capture_opts.multi_files_on) {
/* cleanup ringbuffer */
ringbuf_error_cleanup();
} else {
g_free(cfile.save_file);
}
cfile.save_file = NULL;
- if (capture_child) {
- /* This is the child process for a sync mode capture.
- Send the error message to our parent, so they can display a
- dialog box containing it. */
- send_errmsg_to_parent(errmsg);
- } else {
- /* Display the dialog box ourselves; there's no parent. */
- simple_dialog(ESD_TYPE_CRIT, NULL, "%s", errmsg);
+ popup_errmsg(errmsg);
+
+#ifndef _WIN32
+ if (ld.from_cap_pipe) {
+ if (pipe_fd >= 0)
+ close(pipe_fd);
+ } else
+#endif
+ {
+ if (pch != NULL)
+ pcap_close(pch);
}
- if (pch != NULL && !ld.from_pipe)
- pcap_close(pch);
return FALSE;
}
}
static void
-send_errmsg_to_parent(const char *errmsg)
+popup_errmsg(const char *errmsg)
{
- int msglen = strlen(errmsg);
- char lenbuf[10+1+1];
-
- sprintf(lenbuf, "%u%c", msglen, SP_ERROR_MSG);
- write(1, lenbuf, strlen(lenbuf));
- write(1, errmsg, msglen);
-}
-
-static float
-pct(gint num, gint denom) {
- if (denom) {
- return (float) num * 100.0 / (float) denom;
+ if (capture_child) {
+ /* This is the child process for a sync mode capture.
+ Send the error message to our parent, so they can display a
+ dialog box containing it. */
+ sync_pipe_errmsg_to_parent(errmsg);
} else {
- return 0.0;
+ /* Display the dialog box ourselves; there's no parent. */
+ simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK, "%s", errmsg);
}
}
static void
-stop_capture(int signo)
+stop_capture_signal_handler(int signo _U_)
{
ld.go = FALSE;
}
-static void
-capture_delete_cb(GtkWidget *w, GdkEvent *event, gpointer data) {
- capture_stop_cb(NULL, data);
-}
-
-static void
-capture_stop_cb(GtkWidget *w, gpointer data) {
- loop_data *ld = (loop_data *) data;
-
- ld->go = FALSE;
-}
void
capture_stop(void)
{
- /*
- * XXX - find some way of signaling the child in Win32.
- */
+ if (fork_child != -1) {
#ifndef _WIN32
- if (fork_child != -1)
kill(fork_child, SIGUSR1);
+#else
+ /* XXX: this is not the preferred method of closing a process!
+ * the clean way would be getting the process id of the child process,
+ * then getting window handle hWnd of that process (using EnumChildWindows),
+ * and then do a SendMessage(hWnd, WM_CLOSE, 0, 0)
+ *
+ * Unfortunately, I don't know how to get the process id from the handle */
+ /* Hint: OpenProcess will get an handle from the id, not vice versa :-(
+ *
+ * Hint: GenerateConsoleCtrlEvent() will only work, if both processes are
+ * running in the same console, I don't know if that is true for our case.
+ * And this also will require to have the process id
+ */
+ TerminateProcess((HANDLE) fork_child, 0);
#endif
+ } else {
+ ld.go = FALSE;
+ }
}
void
kill_capture_child(void)
{
- /*
- * XXX - find some way of signaling the child in Win32.
- */
-#ifndef _WIN32
if (fork_child != -1)
- kill(fork_child, SIGTERM); /* SIGTERM so it can clean up if necessary */
+#ifndef _WIN32
+ kill(fork_child, SIGTERM); /* SIGTERM so it can clean up if necessary */
+#else
+ /* XXX: this is not the preferred method of closing a process!
+ * the clean way would be getting the process id of the child process,
+ * then getting window handle hWnd of that process (using EnumChildWindows),
+ * and then do a SendMessage(hWnd, WM_CLOSE, 0, 0)
+ *
+ * Unfortunately, I don't know how to get the process id from the handle */
+ /* Hint: OpenProcess will get an handle from the id, not vice versa :-(
+ *
+ * Hint: GenerateConsoleCtrlEvent() will only work, if both processes are
+ * running in the same console, I don't know if that is true for our case.
+ * And this also will require to have the process id
+ */
+ TerminateProcess((HANDLE) fork_child, 0);
#endif
}
+/* one packet was captured, process it */
static void
-capture_pcap_cb(u_char *user, const struct pcap_pkthdr *phdr,
- const u_char *pd) {
+capture_pcap_cb(guchar *user, const struct pcap_pkthdr *phdr,
+ const guchar *pd)
+{
struct wtap_pkthdr whdr;
+ union wtap_pseudo_header pseudo_header;
loop_data *ld = (loop_data *) user;
int err;
- if ((++ld->counts.total >= ld->max) && (ld->max > 0))
+ /* user told us to stop after x packets, do we have enough? */
+ if ((++ld->counts.total >= ld->max) && (ld->max > 0))
{
ld->go = FALSE;
}
+
+ /* Convert from libpcap to Wiretap format.
+ If that fails, set "ld->go" to FALSE, to stop the capture, and set
+ "ld->err" to the error. */
+ pd = wtap_process_pcap_packet(ld->linktype, phdr, pd, &pseudo_header,
+ &whdr, &err);
+ if (pd == NULL) {
+ ld->go = FALSE;
+ ld->err = err;
+ return;
+ }
+
if (ld->pdh) {
- /* "phdr->ts" may not necessarily be a "struct timeval" - it may
- be a "struct bpf_timeval", with member sizes wired to 32
- bits - and we may go that way ourselves in the future, so
- copy the members individually. */
- whdr.ts.tv_sec = phdr->ts.tv_sec;
- whdr.ts.tv_usec = phdr->ts.tv_usec;
- whdr.caplen = phdr->caplen;
- whdr.len = phdr->len;
- whdr.pkt_encap = ld->linktype;
-
- /* If this fails, set "ld->go" to FALSE, to stop the capture, and set
- "ld->err" to the error. */
- if (!wtap_dump(ld->pdh, &whdr, NULL, pd, &err)) {
- ld->go = FALSE;
- ld->err = err;
- }
+ /* We're supposed to write the packet to a file; do so.
+ If this fails, set "ld->go" to FALSE, to stop the capture, and set
+ "ld->err" to the error. */
+ if (!wtap_dump(ld->pdh, &whdr, &pseudo_header, pd, &err)) {
+ ld->go = FALSE;
+ ld->err = err;
+ }
}
switch (ld->linktype) {
case WTAP_ENCAP_ETHERNET:
- capture_eth(pd, 0, phdr->len, &ld->counts);
+ capture_eth(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_FDDI:
case WTAP_ENCAP_FDDI_BITSWAPPED:
- capture_fddi(pd, phdr->len, &ld->counts);
+ capture_fddi(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_PRISM_HEADER:
- capture_prism(pd, 0, phdr->len, &ld->counts);
+ capture_prism(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_TOKEN_RING:
- capture_tr(pd, 0, phdr->len, &ld->counts);
+ capture_tr(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_NULL:
- capture_null(pd, phdr->len, &ld->counts);
+ capture_null(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_PPP:
- capture_ppp_hdlc(pd, 0, phdr->len, &ld->counts);
+ capture_ppp_hdlc(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_RAW_IP:
- capture_raw(pd, phdr->len, &ld->counts);
+ capture_raw(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_SLL:
- capture_sll(pd, phdr->len, &ld->counts);
+ capture_sll(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_LINUX_ATM_CLIP:
- capture_clip(pd, phdr->len, &ld->counts);
+ capture_clip(pd, whdr.caplen, &ld->counts);
+ break;
+ case WTAP_ENCAP_IEEE_802_11:
+ case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
+ capture_ieee80211(pd, 0, whdr.caplen, &ld->counts);
+ break;
+ case WTAP_ENCAP_CHDLC:
+ capture_chdlc(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_LOCALTALK:
- capture_llap(pd, phdr->len, &ld->counts);
+ capture_llap(&ld->counts);
+ break;
+ case WTAP_ENCAP_ATM_PDUS:
+ capture_atm(&pseudo_header, pd, whdr.caplen, &ld->counts);
+ break;
+ case WTAP_ENCAP_IP_OVER_FC:
+ capture_ipfc(pd, whdr.caplen, &ld->counts);
+ break;
+ case WTAP_ENCAP_ARCNET:
+ capture_arcnet(pd, whdr.caplen, &ld->counts, FALSE, TRUE);
+ break;
+ case WTAP_ENCAP_ARCNET_LINUX:
+ capture_arcnet(pd, whdr.caplen, &ld->counts, TRUE, FALSE);
+ break;
+ case WTAP_ENCAP_APPLE_IP_OVER_IEEE1394:
+ capture_ap1394(pd, 0, whdr.caplen, &ld->counts);
break;
- /* XXX - FreeBSD may append 4-byte ATM pseudo-header to DLT_ATM_RFC1483,
- with LLC header following; we should implement it at some
- point. */
+ /* XXX - some ATM drivers on FreeBSD might prepend a 4-byte ATM
+ pseudo-header to DLT_ATM_RFC1483, with LLC header following;
+ we might have to implement that at some point. */
}
}
git.samba.org / obnox / wireshark / wip.git / blobdiff