/* capture.c
* Routines for packet capture windows
*
- * $Id: capture.c,v 1.149 2001/05/01 00:18:46 guy Exp $
+ * $Id: capture.c,v 1.207 2003/05/15 13:33:53 deniel Exp $
*
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * 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.
#ifdef HAVE_LIBPCAP
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#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__)
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) || defined(__APPLE__)
#ifndef BSD
#define BSD
#endif /* BSD */
-#endif /* defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) */
+#endif /* defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) || defined(__APPLE__) */
/*
* We don't want to do a "select()" on the pcap_t's file descriptor on
# define MUST_DO_SELECT
#endif
-#include "gtk/main.h"
-#include "gtk/gtkglobals.h"
-#include "packet.h"
+#include <epan/packet.h>
#include "file.h"
#include "capture.h"
#include "util.h"
+#include "pcap-util.h"
#include "simple_dialog.h"
#include "prefs.h"
#include "globals.h"
+#include "conditions.h"
+#include "capture_stop_conditions.h"
+#include "ringbuffer.h"
#include "wiretap/libpcap.h"
#include "wiretap/wtap.h"
+#include "wiretap/wtap-capture.h"
+#include "packet-atalk.h"
+#include "packet-atm.h"
#include "packet-clip.h"
#include "packet-eth.h"
#include "packet-fddi.h"
#include "packet-tr.h"
#include "packet-ieee80211.h"
#include "packet-chdlc.h"
+#include "packet-prism.h"
+#include "packet-ipfc.h"
+#include "packet-arcnet.h"
+
+#ifdef _WIN32
+#include "capture-wpcap.h"
+#endif
+
+/*
+ * Capture options.
+ */
+capture_options capture_opts;
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; /* In parent, process ID of child */
+static int fork_child = -1; /* If not -1, in parent, process ID of child */
static guint cap_input_id;
/*
* Indications sent out on the sync pipe.
*/
#define SP_CAPSTART ';' /* capture start message */
-#define SP_PACKET_COUNT '*' /* count of packets captured since last message */
-#define SP_ERROR_MSG '!' /* length of error message that follows */
-#define SP_DROPS '#' /* count of packets dropped in capture */
+#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;
#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 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 send_errmsg_to_parent(const char *);
static float pct(gint, gint);
static void stop_capture(int signo);
typedef struct _loop_data {
- gint go; /* TRUE as long as we're supposed to keep capturing */
+ gboolean go; /* TRUE as long as we're supposed to keep capturing */
gint max; /* Number of packets we're supposed to capture - 0 means infinite */
int err; /* if non-zero, error seen while 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 */
packet_counts counts;
wtap_dumper *pdh;
+#ifndef _WIN32
+ 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 pipe_dispatch */
+ enum {
+ STATE_EXPECT_REC_HDR, STATE_READ_REC_HDR,
+ STATE_EXPECT_DATA, STATE_READ_DATA
+ } pipe_state;
+
+ enum { PIPOK, PIPEOF, PIPERR, PIPNEXIST } pipe_err;
+#endif
} 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 *);
+static int pipe_open_live(char *, struct pcap_hdr *, loop_data *, char *, int);
+static int pipe_dispatch(int, loop_data *, struct pcap_hdr *, \
+ struct pcaprec_modified_hdr *, guchar *, char *, int);
#endif
/* Win32 needs the O_BINARY flag for open() */
/* Open a specified file, or create a temporary file, and start a capture
to the file in question. */
void
-do_capture(char *capfile_name)
+do_capture(const char *save_file)
{
char tmpname[128+1];
gboolean is_tempfile;
- u_char c;
+ guchar c;
int i;
guint byte_count;
char *msg;
int capture_succeeded;
gboolean stats_known;
struct pcap_stat stats;
-
- if (capfile_name != NULL) {
- /* 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);
+ gchar *capfile_name;
+
+ 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.ringbuffer_on) {
+ /* ringbuffer is enabled */
+ cfile.save_file_fd = ringbuf_init(capfile_name,
+ capture_opts.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 */
"The temporary file to which the capture would be saved (\"%s\")"
"could not be opened: %s.", capfile_name, strerror(errno));
} else {
+ if (capture_opts.ringbuffer_on) {
+ ringbuf_error_cleanup();
+ }
simple_dialog(ESD_TYPE_CRIT, NULL,
- file_open_error_message(errno, TRUE), capfile_name);
+ file_open_error_message(errno, TRUE, WTAP_FILE_PCAP), capfile_name);
}
+ g_free(capfile_name);
return;
}
- close_cap_file(&cfile, info_bar);
+ close_cap_file(&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)". */
- if (prefs.capture_real_time) { /* do the capture in a child process */
+ if (capture_opts.sync_mode) { /* do the capture in a child process */
char ssnap[24];
- char scount[24]; /* need a constant for len of numbers */
+ 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];
char errmsg[1024+1];
int error;
sprintf(save_file_fd,"%d",cfile.save_file_fd); /* in lieu of itoa */
argv = add_arg(argv, &argc, save_file_fd);
- argv = add_arg(argv, &argc, "-c");
- sprintf(scount,"%d",cfile.count);
- argv = add_arg(argv, &argc, scount);
+ if (capture_opts.has_autostop_count) {
+ argv = add_arg(argv, &argc, "-c");
+ sprintf(scount,"%d",capture_opts.autostop_count);
+ argv = add_arg(argv, &argc, scount);
+ }
+
+ if (capture_opts.has_snaplen) {
+ argv = add_arg(argv, &argc, "-s");
+ sprintf(ssnap,"%d",capture_opts.snaplen);
+ argv = add_arg(argv, &argc, ssnap);
+ }
+
+ if (capture_opts.has_autostop_filesize) {
+ argv = add_arg(argv, &argc, "-a");
+ sprintf(sautostop_filesize,"filesize:%d",capture_opts.autostop_filesize);
+ argv = add_arg(argv, &argc, sautostop_filesize);
+ }
- argv = add_arg(argv, &argc, "-s");
- sprintf(ssnap,"%d",cfile.snap);
- argv = add_arg(argv, &argc, ssnap);
+ if (capture_opts.has_autostop_duration) {
+ argv = add_arg(argv, &argc, "-a");
+ sprintf(sautostop_duration,"duration:%d",capture_opts.autostop_duration);
+ argv = add_arg(argv, &argc, sautostop_duration);
+ }
- if (!prefs.capture_prom_mode)
+ if (!capture_opts.promisc_mode)
argv = add_arg(argv, &argc, "-p");
#ifdef _WIN32
argv = 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);
/* Spawn process */
fork_child = spawnvp(_P_NOWAIT, ethereal_path, argv);
g_free(fontstring);
- g_free(filterstring);
+ if (filterstring) {
+ g_free(filterstring);
+ }
/* Keep a copy for later evaluation by _cwait() */
child_process = fork_child;
#else
- signal(SIGCHLD, SIG_IGN);
if (pipe(sync_pipe) < 0) {
/* Couldn't create the pipe between parent and child. */
error = errno;
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);
+ /* We weren't able to open the capture file; user has been
+ alerted. Close the sync pipe. */
- /* Close the sync pipe. */
close(sync_pipe[READ]);
/* Don't unlink the save file - leave it around, for debugging
} else {
/* Failure - the child process sent us a message indicating
what the problem was. */
- msg = g_malloc(byte_count + 1);
- if (msg == NULL) {
- simple_dialog(ESD_TYPE_WARN, NULL,
- "Capture child process failed, but its error message was too big.");
- } else if (byte_count == 0) {
- /* Zero-length message? */
+ if (byte_count == 0) {
+ /* Zero-length message? */
simple_dialog(ESD_TYPE_WARN, NULL,
"Capture child process failed, but its error message was empty.");
} else {
- i = read(sync_pipe[READ], msg, byte_count);
- if (i < 0) {
+ msg = g_malloc(byte_count + 1);
+ if (msg == NULL) {
simple_dialog(ESD_TYPE_WARN, NULL,
+ "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,
"Capture child process failed: Error %s reading its error message.",
strerror(errno));
- } else if (i == 0) {
- simple_dialog(ESD_TYPE_WARN, NULL,
+ } else if (i == 0) {
+ simple_dialog(ESD_TYPE_WARN, NULL,
"Capture child process failed: EOF reading its error message.");
- wait_for_child(FALSE);
- } else
- simple_dialog(ESD_TYPE_WARN, NULL, msg);
- g_free(msg);
+ wait_for_child(FALSE);
+ } else
+ simple_dialog(ESD_TYPE_CRIT, NULL, msg);
+ g_free(msg);
+ }
/* Close the sync pipe. */
close(sync_pipe[READ]);
case READ_ABORTED:
/* Exit by leaving the main loop, so that any quit functions
we registered get called. */
- gtk_main_quit();
+ if (gtk_main_level() > 0)
+ gtk_main_quit();
return;
}
}
}
/* We're not doing a capture any more, so we don't have a save
file. */
- g_free(cfile.save_file);
+ if (capture_opts.ringbuffer_on) {
+ ringbuf_free();
+ } else {
+ g_free(cfile.save_file);
+ }
cfile.save_file = NULL;
}
}
/* 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 void
+cap_file_input_cb(gpointer data, gint source _U_,
+ GdkInputCondition condition _U_)
{
capture_file *cf = (capture_file *)data;
#define BUFSIZE 4096
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);
-
+
/* Read what remains of the capture file, and finish the capture.
XXX - do something if this fails? */
switch (finish_tail_cap_file(cf, &err)) {
msglen -= chars_to_copy;
}
*r = '\0';
- simple_dialog(ESD_TYPE_WARN, NULL, msg);
+ simple_dialog(ESD_TYPE_CRIT, NULL, msg);
g_free(msg);
break;
default :
q++;
nread--;
break;
- }
+ }
}
/* Read from the capture file the number of records the child told us
"Child capture process died: wait status %#o", wstatus);
}
}
+
+ /* No more child process. */
+ fork_child = -1;
#endif
}
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:
#define CAP_READ_TIMEOUT 250
#ifndef _WIN32
-/* Take carre of byte order in the libpcap headers read from pipes.
+/* Take care 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)
}
}
-/* Mimic pcap_open_live() for pipe captures
+/* 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)
+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 bytes_read, b;
+ int b, sel_ret;
+ unsigned int bytes_read;
+ fd_set rfds;
+ struct timeval timeout;
- 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;
+ /*
+ * 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->pipe_err = PIPNEXIST;
+ else {
+ snprintf(errmsg, errmsgl,
+ "The capture session could not be initiated "
+ "due to error on pipe: %s", strerror(errno));
+ ld->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->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->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->pipe_err = PIPERR;
+ return -1;
+ }
+ }
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 (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->pipe_state = STATE_EXPECT_REC_HDR;
+ ld->pipe_err = PIPOK;
return fd;
+
+error:
+ ld->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)
+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->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->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 (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->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);
-
- /* Set the initial payload to the packet length, and the initial
- captured payload to the capture length (other protocols may
- reduce them if their headers say they're less). */
- pi.len = whdr.len;
- pi.captured_len = whdr.caplen;
-
- /* update capture statistics */
- switch (ld->linktype) {
- case WTAP_ENCAP_ETHERNET:
- capture_eth(pd, 0, &ld->counts);
- break;
- case WTAP_ENCAP_FDDI:
- case WTAP_ENCAP_FDDI_BITSWAPPED:
- capture_fddi(pd, &ld->counts);
- break;
- case WTAP_ENCAP_TOKEN_RING:
- capture_tr(pd, 0, &ld->counts);
- break;
- case WTAP_ENCAP_NULL:
- capture_null(pd, &ld->counts);
- break;
- case WTAP_ENCAP_PPP:
- capture_ppp_hdlc(pd, 0, &ld->counts);
- break;
- case WTAP_ENCAP_RAW_IP:
- capture_raw(pd, &ld->counts);
- break;
- case WTAP_ENCAP_LINUX_ATM_CLIP:
- capture_clip(pd, &ld->counts);
- break;
- case WTAP_ENCAP_IEEE_802_11:
- capture_ieee80211(pd, 0, &ld->counts);
+ if (b == 0)
+ result = PD_PIPE_EOF;
+ else
+ result = PD_PIPE_ERR;
break;
- case WTAP_ENCAP_CHDLC:
- capture_chdlc(pd, 0, &ld->counts);
+ }
+ if ((ld->bytes_read += b) < rechdr->hdr.incl_len)
+ return 0;
+ result = PD_DATA_READ;
+ break;
+
+ default:
+ snprintf(errmsg, errmsgl, "pipe_dispatch: invalid state");
+ result = PD_ERR;
+
+ } /* switch (ld->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. */
+ 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->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->pipe_state = STATE_EXPECT_REC_HDR;
+ return 1;
+
+ case PD_PIPE_EOF:
+ ld->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->pipe_err = PIPERR;
+ /* Return here rather than inside the switch to prevent GCC warning */
+ return -1;
}
#endif
capture(gboolean *stats_known, struct pcap_stat *stats)
{
GtkWidget *cap_w, *main_vb, *stop_bt, *counts_tb;
+ GtkWidget *counts_fr, *running_tb, *running_label, *running_time;
pcap_t *pch;
int pcap_encap;
- int snaplen;
- gchar err_str[PCAP_ERRBUF_SIZE], label_str[64];
+ 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;
time_t upd_time, cur_time;
- int err, inpkts, i;
+ time_t start_time;
+ int err, inpkts;
+ condition *cnd_stop_capturesize = NULL;
+ condition *cnd_stop_timeout = NULL;
+ condition *cnd_ring_timeout = NULL;
+ unsigned int i;
static const char capstart_msg = SP_CAPSTART;
char errmsg[4096+1];
-#ifndef _WIN32
- static const char ppamsg[] = "can't find PPA for ";
- char *libpcap_warn;
-#endif
+ gboolean write_ok;
+ gboolean close_ok;
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 },
- { "SCTP", &ld.counts.sctp },
- { "TCP", &ld.counts.tcp },
- { "UDP", &ld.counts.udp },
- { "ICMP", &ld.counts.icmp },
- { "OSPF", &ld.counts.ospf },
- { "GRE", &ld.counts.gre },
- { "NetBIOS", &ld.counts.netbios },
- { "IPX", &ld.counts.ipx },
- { "VINES", &ld.counts.vines },
- { "Other", &ld.counts.other }
+ { "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 },
+ { "ARP", &ld.counts.arp, 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
+#ifdef _WIN32
+ WORD wVersionRequested;
+ WSADATA wsaData;
+#else
+ 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
+#ifdef MUST_DO_SELECT
+ int pcap_fd = 0;
+#endif
+
+/* Size of buffer to hold decimal representation of
+ signed/unsigned 64-bit int */
+#define DECISIZE 20
+
+ /* 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
+ 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
ld.go = TRUE;
ld.counts.total = 0;
- ld.max = cfile.count;
+ if (capture_opts.has_autostop_count)
+ ld.max = capture_opts.autostop_count;
+ 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.sync_packets = 0;
ld.counts.sctp = 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. */
*stats_known = FALSE;
- /* Open the network interface to capture from it. */
- pch = pcap_open_live(cfile.iface, cfile.snap, prefs.capture_prom_mode,
- CAP_READ_TIMEOUT, err_str);
+ /* Open the network interface to capture from it.
+ Some versions of libpcap may put warnings into the error buffer
+ 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,
+ capture_opts.has_snaplen ? capture_opts.snaplen :
+ WTAP_MAX_PACKET_SIZE,
+ capture_opts.promisc_mode, CAP_READ_TIMEOUT,
+ open_err_str);
if (pch == NULL) {
+ /* 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
"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",
- err_str);
+ "Note that the driver Ethereal uses for packet capture on Windows doesn't\n"
+ "support capturing on PPP/WAN interfaces in Windows NT/2000/XP/.NET Server.\n",
+ open_err_str);
goto error;
#else
/* try to open cfile.iface as a pipe */
- pipe_fd = pipe_open_live(cfile.iface, &hdr, &ld, err_str);
+ pipe_fd = 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();
}
- /* 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(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.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", err_str,
+ "you have the proper interface or pipe specified.%s", open_err_str,
libpcap_warn);
+ }
+ /*
+ * Else pipe (or file) does exist and pipe_open_live() has
+ * filled in errmsg
+ */
goto error;
- }
+ } else
+ /* 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) {
/* A capture filter was specified; set it up. */
- if (pcap_lookupnet (cfile.iface, &netnum, &netmask, err_str) < 0) {
+ if (pcap_lookupnet(cfile.iface, &netnum, &netmask, lookup_net_err_str) < 0) {
/*
* Well, we can't get the netmask for this interface; it's used
* only for filters that check for broadcast IP addresses, so
#ifndef _WIN32
if (ld.from_pipe) {
pcap_encap = hdr.network;
- snaplen = hdr.snaplen;
+ file_snaplen = hdr.snaplen;
} else
#endif
{
- pcap_encap = pcap_datalink(pch);
- snaplen = pcap_snapshot(pch);
+ pcap_encap = get_pcap_linktype(pch, cfile.iface);
+ 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;
}
- ld.pdh = wtap_dump_fdopen(cfile.save_file_fd, WTAP_FILE_PCAP,
- ld.linktype, snaplen, &err);
+ if (capture_opts.ringbuffer_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, file_snaplen, &err);
+ }
if (ld.pdh == NULL) {
/* We couldn't set up to write to the capture file. */
goto error;
}
+ /* Does "open_err_str" contain a non-empty string? If so, "pcap_open_live()"
+ returned a warning; print it, but keep capturing. */
+ if (open_err_str[0] != '\0')
+ g_warning("%s.", open_err_str);
+
/* XXX - capture SIGTERM and close the capture, in case we're on a
Linux 2.0[.x] system and you have to explicitly close the capture
stream in order to turn promiscuous mode off? We need to do that
gtk_container_add(GTK_CONTAINER(cap_w), main_vb);
gtk_widget_show(main_vb);
+ counts_fr = gtk_frame_new("Captured Frames");
+ gtk_box_pack_start(GTK_BOX(main_vb), counts_fr, FALSE, FALSE, 3);
+ gtk_widget_show(counts_fr);
+
/* 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_container_add(GTK_CONTAINER(counts_fr), counts_tb);
+ gtk_container_border_width(GTK_CONTAINER(counts_tb), 5);
gtk_widget_show(counts_tb);
for (i = 0; i < N_COUNTS; i++) {
gtk_widget_show(counts[i].percent);
}
+ /* Running time */
+ running_tb = gtk_table_new(1, 3, TRUE);
+ gtk_box_pack_start(GTK_BOX(main_vb), running_tb, FALSE, FALSE, 3);
+ gtk_widget_show(running_tb);
+
+ running_label = gtk_label_new("Running");
+ gtk_misc_set_alignment(GTK_MISC(running_label), 0.0f, 0.0f);
+ gtk_widget_show(running_label);
+ gtk_table_attach_defaults(GTK_TABLE(running_tb),
+ running_label, 0, 1, 0, 1);
+
+ running_time = gtk_label_new("00:00:00");
+ gtk_misc_set_alignment(GTK_MISC(running_time), 0.0f, 0.0f);
+ gtk_widget_show(running_time);
+ gtk_table_attach(GTK_TABLE(running_tb),
+ running_time,
+ 1, 2, 0, 1, 0, 0, 5, 0);
+
/* 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_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_box_pack_start(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_show(cap_w);
+ start_time = time(NULL);
upd_time = time(NULL);
#ifdef MUST_DO_SELECT
if (!ld.from_pipe) pcap_fd = pcap_fileno(pch);
* 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);
#endif
+ /* initialize capture stop conditions */
+ init_capture_stop_conditions();
+ /* create stop conditions */
+ if (capture_opts.has_autostop_filesize)
+ cnd_stop_capturesize =
+ cnd_new(CND_CLASS_CAPTURESIZE,(long)capture_opts.autostop_filesize * 1000);
+ if (capture_opts.has_autostop_duration)
+ cnd_stop_timeout =
+ cnd_new(CND_CLASS_TIMEOUT,(gint32)capture_opts.autostop_duration);
+
+ if (capture_opts.ringbuffer_on && capture_opts.has_ring_duration)
+ cnd_ring_timeout =
+ cnd_new(CND_CLASS_TIMEOUT, capture_opts.ringbuffer_duration);
+
while (ld.go) {
while (gtk_events_pending()) gtk_main_iteration();
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 = pipe_dispatch(pipe_fd, &ld, &hdr, &rechdr, pcap_data,
+ errmsg, sizeof errmsg);
+ if (inpkts < 0) {
+ ld.go = FALSE;
+ }
+ }
}
else
#endif
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);
- } else
- inpkts = 0;
+ inpkts = pcap_dispatch(pch, 1, capture_pcap_cb, (guchar *) &ld);
+ if (inpkts < 0) {
+ ld.pcap_err = TRUE;
+ ld.go = FALSE;
+ }
+ } 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
}
- if (inpkts > 0)
+
+ if (inpkts > 0) {
ld.sync_packets += inpkts;
+ /* check capture stop conditons */
+ if (cnd_stop_capturesize != NULL && cnd_eval(cnd_stop_capturesize,
+ (guint32)wtap_get_bytes_dumped(ld.pdh))){
+ /* Capture file reached its maximum size. */
+ if (capture_opts.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);
+ if (cnd_ring_timeout) {
+ cnd_reset(cnd_ring_timeout);
+ }
+ } else {
+ /* File switch failed: stop here */
+ ld.go = FALSE;
+ continue;
+ }
+ } else {
+ /* no ringbuffer - just stop */
+ ld.go = FALSE;
+ }
+ }
+ }
+
/* 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);
+ /* calculate and display running time */
+ cur_time -= start_time;
+ snprintf(label_str, sizeof(label_str), "%02ld:%02ld:%02ld",
+ (long)(cur_time/3600), (long)((cur_time%3600)/60),
+ (long)(cur_time%60));
+ gtk_label_set(GTK_LABEL(running_time), label_str);
- gtk_label_set(GTK_LABEL(counts[i].value), label_str);
+ if (ld.sync_packets) {
- snprintf(label_str, sizeof(label_str), "(%.1f%%)",
- pct(*counts[i].value_ptr, ld.counts.total));
+ for (i = 0; i < N_COUNTS; i++) {
+ snprintf(label_str, sizeof(label_str), "%d",
+ *counts[i].value_ptr);
- gtk_label_set(GTK_LABEL(counts[i].percent), label_str);
- }
+ gtk_label_set(GTK_LABEL(counts[i].value), label_str);
+
+ snprintf(label_str, sizeof(label_str), "(%.1f%%)",
+ pct(*counts[i].value_ptr, ld.counts.total));
+
+ gtk_label_set(GTK_LABEL(counts[i].percent), label_str);
+ }
+
+ /* do sync here, too */
+ 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. */
+ char tmp[DECISIZE+1+1];
+ sprintf(tmp, "%d%c", ld.sync_packets, SP_PACKET_COUNT);
+ write(1, tmp, strlen(tmp));
+ }
- /* 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;
+
+ }
+
+ if (cnd_stop_timeout != NULL && cnd_eval(cnd_stop_timeout)) {
+ /* The specified capture time has elapsed; stop the capture. */
+ ld.go = FALSE;
+ } else if (cnd_ring_timeout != NULL && cnd_eval(cnd_ring_timeout)) {
+ /* time elasped for this ring file, swith to the next */
+ if (ringbuf_switch_file(&cfile, &ld.pdh, &ld.err)) {
+ /* File switch succeeded: reset the condition */
+ cnd_reset(cnd_ring_timeout);
+ } else {
+ /* File switch failed: stop here */
+ ld.go = FALSE;
+ }
}
}
+
+ } /* while (ld.go) */
+
+ /* delete stop conditions */
+ if (cnd_stop_capturesize != NULL)
+ cnd_delete(cnd_stop_capturesize);
+ if (cnd_stop_timeout != NULL)
+ cnd_delete(cnd_stop_timeout);
+ if (cnd_ring_timeout != NULL)
+ cnd_delete(cnd_ring_timeout);
+
+ if (ld.pcap_err) {
+ snprintf(errmsg, sizeof(errmsg), "Error while capturing packets: %s",
+ pcap_geterr(pch));
+ popup_errmsg(errmsg);
+#ifdef _WIN32
}
-
- if (ld.err != 0) {
+#else
+ } else if (ld.from_pipe && ld.pipe_err == PIPERR)
+ popup_errmsg(errmsg);
+#endif
+
+ 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. */
- wtap_dump_close(ld.pdh, &err);
+ if (capture_opts.ringbuffer_on) {
+ close_ok = ringbuf_wtap_dump_close(&cfile, &err);
} else {
- if (!wtap_dump_close(ld.pdh, &err)) {
- 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);
- }
- }
+ 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,
+ * 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, pipe_open_live() will say "End of file on pipe during open".
+ */
+ if (ld.from_pipe && pipe_fd >= 0)
close(pipe_fd);
else
#endif
*stats_known = TRUE;
if (capture_child) {
/* Let the parent process know. */
- char tmp[20];
+ char tmp[DECISIZE+1+1];
sprintf(tmp, "%d%c", stats->ps_drop, SP_DROPS);
write(1, tmp, strlen(tmp));
}
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));
- return TRUE;
+ return write_ok;
error:
- /* We can't use the save file, and we have no wtap_dump stream
- to close in order to close it, so close the FD directly. */
- close(cfile.save_file_fd);
-
- /* We couldn't even start the capture, so get rid of the capture
- file. */
- unlink(cfile.save_file); /* silently ignore error */
- 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);
+ if (capture_opts.ringbuffer_on) {
+ /* cleanup ringbuffer */
+ ringbuf_error_cleanup();
} else {
- /* Display the dialog box ourselves; there's no parent. */
- simple_dialog(ESD_TYPE_CRIT, NULL, "%s", errmsg);
+ /* We can't use the save file, and we have no wtap_dump stream
+ to close in order to close it, so close the FD directly. */
+ close(cfile.save_file_fd);
+
+ /* We couldn't even start the capture, so get rid of the capture
+ file. */
+ unlink(cfile.save_file); /* silently ignore error */
+ g_free(cfile.save_file);
+ }
+ cfile.save_file = NULL;
+ popup_errmsg(errmsg);
+
+#ifndef _WIN32
+ if (ld.from_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
+popup_errmsg(const char *errmsg)
+{
+ 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);
+ }
+}
+
static void
send_errmsg_to_parent(const char *errmsg)
{
int msglen = strlen(errmsg);
- char lenbuf[10+1+1];
+ char lenbuf[DECISIZE+1+1];
sprintf(lenbuf, "%u%c", msglen, SP_ERROR_MSG);
write(1, lenbuf, strlen(lenbuf));
}
static void
-stop_capture(int signo)
+stop_capture(int signo _U_)
{
ld.go = FALSE;
}
static void
-capture_delete_cb(GtkWidget *w, GdkEvent *event, gpointer data) {
+capture_delete_cb(GtkWidget *w _U_, GdkEvent *event _U_, gpointer data) {
capture_stop_cb(NULL, data);
}
static void
-capture_stop_cb(GtkWidget *w, gpointer data) {
+capture_stop_cb(GtkWidget *w _U_, gpointer data) {
loop_data *ld = (loop_data *) data;
-
+
ld->go = FALSE;
}
#endif
}
+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 */
+#endif
+}
+
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))
+ 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;
+ }
}
- /* Set the initial payload to the packet length, and the initial
- captured payload to the capture length (other protocols may
- reduce them if their headers say they're less). */
- pi.len = phdr->len;
- pi.captured_len = phdr->caplen;
-
switch (ld->linktype) {
case WTAP_ENCAP_ETHERNET:
- capture_eth(pd, 0, &ld->counts);
+ capture_eth(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_FDDI:
case WTAP_ENCAP_FDDI_BITSWAPPED:
- capture_fddi(pd, &ld->counts);
+ 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, &ld->counts);
+ capture_tr(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_NULL:
- capture_null(pd, &ld->counts);
+ capture_null(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_PPP:
- capture_ppp_hdlc(pd, 0, &ld->counts);
+ capture_ppp_hdlc(pd, 0, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_RAW_IP:
- capture_raw(pd, &ld->counts);
+ capture_raw(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_SLL:
- capture_sll(pd, &ld->counts);
+ capture_sll(pd, whdr.caplen, &ld->counts);
break;
case WTAP_ENCAP_LINUX_ATM_CLIP:
- capture_clip(pd, &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(&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;
- /* 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