/* tethereal.c
*
- * $Id: tethereal.c,v 1.117 2002/01/13 20:35:08 guy Exp $
+ * $Id: tethereal.c,v 1.188 2003/06/22 16:06:03 deniel Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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.
#include <errno.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <setjmp.h>
#endif
-#ifdef HAVE_LIBZ
-#include <zlib.h> /* to get the libz version number */
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
#endif
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
-#if defined(HAVE_UCD_SNMP_SNMP_H)
-#ifdef HAVE_UCD_SNMP_VERSION_H
-#include <ucd-snmp/version.h>
-#endif /* HAVE_UCD_SNMP_VERSION_H */
-#elif defined(HAVE_SNMP_SNMP_H)
-#ifdef HAVE_SNMP_VERSION_H
-#include <snmp/version.h>
-#endif /* HAVE_SNMP_VERSION_H */
-#endif /* SNMP */
-
#ifdef NEED_STRERROR_H
#include "strerror.h"
#endif
#endif
#include <glib.h>
-#include <epan.h>
+#include <epan/epan.h>
+#include <epan/filesystem.h>
#include "globals.h"
-#include "timestamp.h"
-#include "packet.h"
+#include <epan/timestamp.h>
+#include <epan/packet.h>
#include "file.h"
#include "prefs.h"
#include "column.h"
#include "print.h"
-#include "resolv.h"
+#include <epan/resolv.h>
#include "util.h"
#ifdef HAVE_LIBPCAP
#include "pcap-util.h"
#endif
-#include "conversation.h"
-#include "reassemble.h"
-#include "plugins.h"
+#include <epan/conversation.h>
+#include <epan/plugins.h>
#include "register.h"
#include "conditions.h"
#include "capture_stop_conditions.h"
#include "ringbuffer.h"
-#include "epan_dissect.h"
+#include <epan/epan_dissect.h>
+#include "tap.h"
+
+#ifdef HAVE_LIBPCAP
+#include <wiretap/wtap-capture.h>
+#include <wiretap/libpcap.h>
+#endif
-#ifdef WIN32
+#ifdef _WIN32
#include "capture-wpcap.h"
#endif
+/*
+ * This is the template for the decode as option; it is shared between the
+ * various functions that output the usage for this parameter.
+ */
+static const gchar decode_as_arg_template[] = "<layer_type>==<selector>,<decode_as_protocol>";
static guint32 firstsec, firstusec;
static guint32 prevsec, prevusec;
-static GString *comp_info_str;
+static GString *comp_info_str, *runtime_info_str;
+static gboolean quiet;
+static gboolean decode;
static gboolean verbose;
static gboolean print_hex;
static gboolean line_buffered;
typedef struct _loop_data {
gboolean go; /* TRUE as long as we're supposed to keep capturing */
gint linktype;
+ gboolean from_pipe; /* TRUE if we are capturing data from a pipe */
pcap_t *pch;
wtap_dumper *pdh;
jmp_buf stopenv;
+ gboolean output_to_pipe;
+ int packet_count;
+#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;
static loop_data ld;
-static int capture(volatile int, int);
-static void capture_pcap_cb(u_char *, const struct pcap_pkthdr *,
- const u_char *);
+static int capture(int);
+static void capture_pcap_cb(guchar *, const struct pcap_pkthdr *,
+ const guchar *);
+static void report_counts(void);
+#ifdef _WIN32
+static BOOL WINAPI capture_cleanup(DWORD);
+#else /* _WIN32 */
static void capture_cleanup(int);
-#endif
+#ifdef SIGINFO
+static void report_counts_siginfo(int);
+#endif /* SIGINFO */
+#endif /* _WIN32 */
+#endif /* HAVE_LIBPCAP */
typedef struct {
capture_file *cf;
} cb_args_t;
static int load_cap_file(capture_file *, int);
-static void wtap_dispatch_cb_write(u_char *, const struct wtap_pkthdr *, long,
- union wtap_pseudo_header *, const u_char *);
+static void wtap_dispatch_cb_write(guchar *, const struct wtap_pkthdr *, long,
+ union wtap_pseudo_header *, const guchar *);
static void show_capture_file_io_error(const char *, int, gboolean);
-static void wtap_dispatch_cb_print(u_char *, const struct wtap_pkthdr *, long,
- union wtap_pseudo_header *, const u_char *);
+static void wtap_dispatch_cb_print(guchar *, const struct wtap_pkthdr *, long,
+ union wtap_pseudo_header *, const guchar *);
+#ifdef HAVE_LIBPCAP
+#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 *, int);
+static int pipe_dispatch(int, loop_data *, struct pcap_hdr *, \
+ struct pcaprec_modified_hdr *, guchar *, char *, int);
+#endif /* _WIN32 */
+#endif
capture_file cfile;
-FILE *data_out_file = NULL;
ts_type timestamp_type = RELATIVE;
#ifdef HAVE_LIBPCAP
-static int promisc_mode = TRUE;
-#endif
+typedef struct {
+ int snaplen; /* Maximum captured packet length */
+ int promisc_mode; /* Capture in promiscuous mode */
+ int autostop_count; /* Maximum packet count */
+ gboolean has_autostop_duration; /* TRUE if maximum capture duration
+ is specified */
+ gint32 autostop_duration; /* Maximum capture duration */
+ gboolean has_autostop_filesize; /* TRUE if maximum capture file size
+ is specified */
+ gint32 autostop_filesize; /* Maximum capture file size */
+ gboolean ringbuffer_on; /* TRUE if ring buffer in use */
+ guint32 ringbuffer_num_files; /* Number of ring buffer files */
+ gboolean has_ring_duration; /* TRUE if ring duration specified */
+ gint32 ringbuffer_duration; /* Switch file after n seconds */
+} capture_options;
+
+static capture_options capture_opts = {
+ WTAP_MAX_PACKET_SIZE, /* snapshot length - default is
+ infinite, in effect */
+ TRUE, /* promiscuous mode is the default */
+ 0, /* max packet count - default is 0,
+ meaning infinite */
+ FALSE, /* maximum capture duration not
+ specified by default */
+ 0, /* maximum capture duration */
+ FALSE, /* maximum capture file size not
+ specified by default */
+ 0, /* maximum capture file size */
+ FALSE, /* ring buffer off by default */
+ RINGBUFFER_MIN_NUM_FILES, /* default number of ring buffer
+ files */
+ FALSE, /* Switch ring file after some */
+ 0 /* specified time is off by default */
+};
+
+#ifdef SIGINFO
+static gboolean infodelay; /* if TRUE, don't print capture info in SIGINFO handler */
+static gboolean infoprint; /* if TRUE, print capture info after clearing infodelay */
+#endif /* SIGINFO */
+#endif /* HAVE_LIBPCAP */
-static void
-print_usage(void)
+static void
+print_usage(gboolean print_ver)
{
int i;
- fprintf(stderr, "This is GNU t%s %s, compiled %s\n", PACKAGE, VERSION,
- comp_info_str->str);
+ if (print_ver) {
+ fprintf(stderr, "This is GNU t%s %s\n%s\n%s\n", PACKAGE, VERSION,
+ comp_info_str->str, runtime_info_str->str);
+ }
#ifdef HAVE_LIBPCAP
- fprintf(stderr, "t%s [ -DvVhlp ] [ -a <capture autostop condition> ] ...\n",
+ fprintf(stderr, "\nt%s [ -vh ] [ -DlnpqSVx ] [ -a <capture autostop condition> ] ...\n",
PACKAGE);
- fprintf(stderr, "\t[ -b <number of ring buffer files> ] [ -c <count> ]\n");
- fprintf(stderr, "\t[ -f <capture filter> ] [ -F <capture file type> ]\n");
- fprintf(stderr, "\t[ -i <interface> ] [ -n ] [ -N <resolving> ]\n");
- fprintf(stderr, "\t[ -o <preference setting> ] ... [ -r <infile> ] [ -R <read filter> ]\n");
- fprintf(stderr, "\t[ -s <snaplen> ] [ -t <time stamp format> ] [ -w <savefile> ] [ -x ]\n");
+ fprintf(stderr, "\t[ -b <number of ring buffer files>[:<duration>] ] [ -c <count> ]\n");
+ fprintf(stderr, "\t[ -d %s ] ...\n", decode_as_arg_template);
+ fprintf(stderr, "\t[ -f <capture filter> ] [ -F <output file type> ] [ -i <interface> ]\n");
+ fprintf(stderr, "\t[ -N <resolving> ] [ -o <preference setting> ] ... [ -r <infile> ]\n");
+ fprintf(stderr, "\t[ -R <read filter> ] [ -s <snaplen> ] [ -t <time stamp format> ]\n");
+ fprintf(stderr, "\t[ -w <savefile> ] [ -Z <statistics string> ]\n");
#else
- fprintf(stderr, "t%s [ -vVhl ] [ -F <capture file type> ] [ -n ] [ -N <resolving> ]\n", PACKAGE);
+ fprintf(stderr, "\nt%s [ -vh ] [ -lnVx ]\n", PACKAGE);
+ fprintf(stderr, "\t[ -d %s ] ...\n", decode_as_arg_template);
+ fprintf(stderr, "\t[ -F <output file type> ] [ -N <resolving> ]\n");
fprintf(stderr, "\t[ -o <preference setting> ] ... [ -r <infile> ] [ -R <read filter> ]\n");
- fprintf(stderr, "\t[ -t <time stamp format> ] [ -w <savefile> ] [ -x ]\n");
+ fprintf(stderr, "\t[ -t <time stamp format> ] [ -w <savefile> ] [ -Z <statistics string> ]\n");
#endif
fprintf(stderr, "Valid file type arguments to the \"-F\" flag:\n");
for (i = 0; i < WTAP_NUM_FILE_TYPES; i++) {
fprintf(stderr, "\tdefault is libpcap\n");
}
+#ifdef HAVE_LIBPCAP
static int
-get_positive_int(const char *string, const char *name)
+get_natural_int(const char *string, const char *name)
{
long number;
char *p;
exit(1);
}
if (number < 0) {
- fprintf(stderr, "tethereal: The specified %s \"%s\" is a negative number\n",
- name, string);
+ fprintf(stderr, "tethereal: The specified %s is a negative number\n",
+ name);
exit(1);
}
if (number > INT_MAX) {
- fprintf(stderr, "tethereal: The specified %s \"%s\" is too large (greater than %d)\n",
- name, string, INT_MAX);
+ fprintf(stderr, "tethereal: The specified %s is too large (greater than %d)\n",
+ name, INT_MAX);
exit(1);
}
return number;
}
-#ifdef HAVE_LIBPCAP
+static int
+get_positive_int(const char *string, const char *name)
+{
+ long number;
+
+ number = get_natural_int(string, name);
+
+ if (number == 0) {
+ fprintf(stderr, "tethereal: The specified %s is zero\n",
+ name);
+ exit(1);
+ }
+
+ return number;
+}
+
/*
* Given a string of the form "<autostop criterion>:<value>", as might appear
* as an argument to a "-a" option, parse it and set the criterion in
static gboolean
set_autostop_criterion(const char *autostoparg)
{
- u_char *p, *colonp;
+ guchar *p, *colonp;
colonp = strchr(autostoparg, ':');
if (colonp == NULL)
return FALSE;
}
if (strcmp(autostoparg,"duration") == 0) {
- cfile.autostop_duration = get_positive_int(p,"autostop duration");
+ capture_opts.has_autostop_duration = TRUE;
+ capture_opts.autostop_duration = get_positive_int(p,"autostop duration");
} else if (strcmp(autostoparg,"filesize") == 0) {
- cfile.autostop_filesize = get_positive_int(p,"autostop filesize");
+ capture_opts.has_autostop_filesize = TRUE;
+ capture_opts.autostop_filesize = get_positive_int(p,"autostop filesize");
} else {
return FALSE;
}
*colonp = ':'; /* put the colon back */
return TRUE;
}
+
+/*
+ * Given a string of the form "<ring buffer file>:<duration>", as might appear
+ * as an argument to a "-b" option, parse it and set the arguments in
+ * question. Return an indication of whether it succeeded or failed
+ * in some fashion.
+ */
+static gboolean
+get_ring_arguments(const char *arg)
+{
+ guchar *p = NULL, *colonp;
+
+ colonp = strchr(arg, ':');
+
+ if (colonp != NULL) {
+ p = colonp;
+ *p++ = '\0';
+ }
+
+ capture_opts.ringbuffer_num_files =
+ get_natural_int(arg, "number of ring buffer files");
+
+ if (colonp == NULL)
+ return TRUE;
+
+ /*
+ * Skip over any white space (there probably won't be any, but
+ * as we allow it in the preferences file, we might as well
+ * allow it here).
+ */
+ while (isspace(*p))
+ p++;
+ if (*p == '\0') {
+ /*
+ * Put the colon back, so if our caller uses, in an
+ * error message, the string they passed us, the message
+ * looks correct.
+ */
+ *colonp = ':';
+ return FALSE;
+ }
+
+ capture_opts.has_ring_duration = TRUE;
+ capture_opts.ringbuffer_duration = get_positive_int(p,
+ "ring buffer duration");
+
+ *colonp = ':'; /* put the colon back */
+ return TRUE;
+}
+#endif
+
+/* structure to keep track of what tap listeners have been registered.
+ */
+typedef struct _ethereal_tap_list {
+ struct _ethereal_tap_list *next;
+ char *cmd;
+ void (*func)(char *arg);
+} ethereal_tap_list;
+static ethereal_tap_list *tap_list=NULL;
+
+void
+register_ethereal_tap(char *cmd, void (*func)(char *arg))
+{
+ ethereal_tap_list *newtl;
+
+ newtl=malloc(sizeof(ethereal_tap_list));
+ newtl->next=tap_list;
+ tap_list=newtl;
+ newtl->cmd=cmd;
+ newtl->func=func;
+
+}
+
+/*
+ * For a dissector table, display, on the standard error, its short name
+ * (which is what's used in the "-d" option) and its descriptive name.
+ */
+static void
+display_dissector_table_names(char *table_name, char *ui_name,
+ gpointer user_data _U_)
+{
+ fprintf(stderr, "\t%s (%s)\n", table_name, ui_name);
+}
+
+/*
+ * For a dissector handle, display, on the standard error, the filter name
+ * (which is what's used in the "-d" option) and the full name for the
+ * protocol for the handle.
+ */
+static void
+display_dissector_names(gchar *table _U_, gpointer handle, gpointer data _U_)
+{
+ int proto_id;
+
+ proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
+
+ fprintf(stderr, "\t%s (%s)\n", proto_get_protocol_filter_name(proto_id),
+ proto_get_protocol_name(proto_id));
+}
+
+/*
+ * The protocol_name_search structure is used by find_name_shortname_func()
+ * to pass parameters and store results
+ */
+struct protocol_name_search{
+ gchar *searched_name; /* Protocol name we are looking for */
+ dissector_handle_t matched_handle; /* Handle for a dissector whose protocol has the specified filter name */
+ guint nb_match; /* How many dissectors matched searched_name */
+};
+typedef struct protocol_name_search *protocol_name_search_t;
+
+/*
+ * This function parses all dissectors associated with a table to find the
+ * one whose protocol has the specified filter name. It is called
+ * as a reference function in a call to dissector_table_foreach_handle.
+ * The name we are looking for, as well as the results, are stored in the
+ * protocol_name_search struct pointed to by user_data.
+ * If called using dissector_table_foreach_handle, we actually parse the
+ * whole list of dissectors only once here.
+ */
+static void
+find_name_func(gchar *table _U_, gpointer handle, gpointer user_data) {
+
+ int proto_id;
+ const gchar *protocol_filter_name;
+ protocol_name_search_t search_info;
+
+ g_assert(handle);
+
+ search_info = (protocol_name_search_t)user_data;
+
+ proto_id = dissector_handle_get_protocol_index((dissector_handle_t)handle);
+ protocol_filter_name = proto_get_protocol_filter_name(proto_id);
+ if (strcmp(protocol_filter_name, search_info->searched_name) == 0) {
+ /* Found a match */
+ if (search_info->nb_match == 0) {
+ /* Record this handle only if this is the first match */
+ search_info->matched_handle = (dissector_handle_t)handle; /* Record the handle for this matching dissector */
+ }
+ search_info->nb_match++;
+ }
+}
+
+/*
+ * The function below parses the command-line parameters for the decode as
+ * feature (a string pointer by cl_param).
+ * It checks the format of the command-line, searches for a matching table
+ * and dissector. If a table/dissector match is not found, we display a
+ * summary of the available tables/dissectors (on stderr) and return FALSE.
+ * If everything is fine, we get the "Decode as" preference activated,
+ * then we return TRUE.
+ */
+static gboolean
+add_decode_as(const gchar *cl_param) {
+
+ gchar *table_name;
+ guint32 selector;
+ gchar *decoded_param;
+ gchar *remaining_param;
+ gchar *selector_str;
+ gchar *dissector_str;
+ dissector_handle_t dissector_matching;
+ dissector_table_t table_matching;
+ struct protocol_name_search user_protocol_name;
+
+/* The following code will allocate and copy the command-line options in a string pointed by decoded_param */
+
+ g_assert(cl_param);
+ decoded_param = g_malloc( sizeof(gchar) * strlen(cl_param) + 1 ); /* Allocate enough space to have a working copy of the command-line parameter */
+ g_assert(decoded_param);
+ strcpy(decoded_param, cl_param);
+
+
+ /* The lines below will parse this string (modifying it) to extract all
+ necessary information. Note that decoded_param is still needed since
+ strings are not copied - we just save pointers. */
+
+ table_name = decoded_param; /* Layer type string starts from beginning */
+
+ remaining_param = strchr(table_name, '=');
+ if (remaining_param == NULL) {
+ fprintf(stderr, "tethereal: Parameter \"%s\" doesn't follow the template \"%s\"\n", cl_param, decode_as_arg_template);
+ g_free(decoded_param);
+ return FALSE;
+ }
+
+ *remaining_param = '\0'; /* Terminate the layer type string (table_name) where '=' was detected */
+
+ if (*(remaining_param + 1) != '=') { /* Check for "==" and not only '=' */
+ fprintf(stderr, "tethereal: Warning: -d requires \"==\" instead of \"=\". Option will be treated as \"%s==%s\"\n", table_name, remaining_param + 1);
+ }
+ else {
+ remaining_param++; /* Move to the second '=' */
+ *remaining_param = '\0'; /* Remove the second '=' */
+ }
+ remaining_param++; /* Position after the layer type string */
+
+ selector_str = remaining_param; /* Next part starts with the selector number */
+
+ /* Remove leading and trailing spaces from the table name */
+ while ( table_name[0] == ' ' )
+ table_name++;
+ while ( table_name[strlen(table_name) - 1] == ' ' )
+ table_name[strlen(table_name) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
+
+
+ remaining_param = strchr(selector_str, ',');
+ if (remaining_param == NULL) {
+ fprintf(stderr, "tethereal: Parameter \"%s\" doesn't follow the template \"%s\"\n", cl_param, decode_as_arg_template);
+ g_free(decoded_param);
+ return FALSE;
+ }
+
+ *remaining_param = '\0'; /* Terminate the selector number string (selector_str) where ',' was detected */
+
+ remaining_param++; /* Position after the selector number string */
+
+
+ dissector_str = remaining_param; /* All the rest of the string is the dissector (decode as protocol) name */
+
+/* The following part looks for the layer type part of the parameter */
+ table_matching = NULL;
+
+/* Look for the requested table */
+ if ( !(*(table_name)) ) { /* Is the table name empty, if so, don't even search for anything, display a message */
+ fprintf(stderr, "tethereal: No layer type specified\n"); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
+ }
+ else {
+ table_matching = find_dissector_table(table_name);
+ if (!table_matching) {
+ fprintf(stderr, "tethereal: Unknown layer type -- %s\n", table_name); /* Note, we don't exit here, but table_matching will remain NULL, so we exit below */
+ }
+ }
+
+ if (!table_matching) {
+ fprintf(stderr, "tethereal: Valid layer types are:\n");
+ dissector_all_tables_foreach_table(display_dissector_table_names, NULL);
+
+ g_free(decoded_param);
+ return FALSE;
+ }
+
+ switch (get_dissector_table_type(table_name)) {
+
+ case FT_UINT8:
+ case FT_UINT16:
+ case FT_UINT24:
+ case FT_UINT32:
+ /* The selector for this table is an unsigned number. Parse it as such.
+ There's no need to remove leading and trailing spaces from the
+ selector number string, because sscanf will do that for us. */
+ if ( sscanf(selector_str, "%u", &selector) != 1 ) {
+ fprintf(stderr, "tethereal: Invalid selector number \"%s\"\n", selector_str);
+ g_free(decoded_param);
+ return FALSE;
+ }
+ break;
+
+ default:
+ /* There are currently no dissector tables with any types other
+ than the ones listed above, but we might, for example, have
+ string-based dissector tables at some point. */
+ g_assert_not_reached();
+ }
+
+ /* Remove leading and trailing spaces from the dissector name */
+ while ( dissector_str[0] == ' ' )
+ dissector_str++;
+ while ( dissector_str[strlen(dissector_str) - 1] == ' ' )
+ dissector_str[strlen(dissector_str) - 1] = '\0'; /* Note: if empty string, while loop will eventually exit */
+
+
+#ifdef DEBUG
+ fprintf(stderr, "tethereal: Debug info: table=\"%s\", selector=\"%d\", dissector=\"%s\"\n", table_name, selector, dissector_str); // For debug only!
#endif
+/* The is the end of the code that parses the command-line options. All information have now been stored in the structure preference. All strings are still pointing to decoded_parm that needs to be kept in memory as long as preference is needed, and decoded_param needs to be deallocated at each exit point of this function */
+
+
+ dissector_matching = NULL;
+
+/* We now have a pointer to the handle for the requested table inside the variable table_matching */
+ if ( ! (*dissector_str) ) { /* Is the dissector name empty, if so, don't even search for a matching dissector and display all dissectors found for the selected table */
+ fprintf(stderr, "tethereal: No protocol name specified\n"); /* Note, we don't exit here, but dissector_matching will remain NULL, so we exit below */
+ }
+ else {
+ user_protocol_name.nb_match = 0;
+ user_protocol_name.searched_name = dissector_str;
+ user_protocol_name.matched_handle = NULL;
+ dissector_table_foreach_handle(table_name, find_name_func, &user_protocol_name); /* Go and perform the search for this dissector in the this table's dissectors' names and shortnames */
+
+ if (user_protocol_name.nb_match != 0) {
+ dissector_matching = user_protocol_name.matched_handle;
+ if (user_protocol_name.nb_match > 1) {
+ fprintf(stderr, "tethereal: Warning: Protocol \"%s\" matched %u dissectors, first one will be used\n", dissector_str, user_protocol_name.nb_match);
+ }
+ }
+ else {
+ /* OK, check whether the problem is that there isn't any such
+ protocol, or that there is but it's not specified as a protocol
+ that's valid for that dissector table.
+ Note, we don't exit here, but dissector_matching will remain NULL,
+ so we exit below */
+ if (proto_get_id_by_filter_name(dissector_str) == -1) {
+ /* No such protocol */
+ fprintf(stderr, "tethereal: Unknown protocol -- \"%s\"\n", dissector_str);
+ } else {
+ fprintf(stderr, "tethereal: Protocol \"%s\" isn't valid for layer type \"%s\"\n",
+ dissector_str, table_name);
+ }
+ }
+ }
+
+ if (!dissector_matching) {
+ fprintf(stderr, "tethereal: Valid protocols for layer type \"%s\" are:\n", table_name);
+ dissector_table_foreach_handle(table_name, display_dissector_names, NULL);
+ g_free(decoded_param);
+ return FALSE;
+ }
+
+ /* We now have a pointer to the handle for the requested dissector
+ (requested protocol) inside the variable dissector_matching */
+ dissector_change(table_name, selector, dissector_matching);
+ g_free(decoded_param); /* "Decode As" rule has been succesfully added */
+ return TRUE;
+}
+
int
main(int argc, char *argv[])
{
int opt, i;
extern char *optarg;
gboolean arg_error = FALSE;
-#ifdef HAVE_LIBPCAP
-#ifdef HAVE_PCAP_VERSION
- extern char pcap_version[];
-#endif /* HAVE_PCAP_VERSION */
-#endif /* HAVE_LIBPCAP */
-#ifdef WIN32
+#ifdef _WIN32
WSADATA wsaData;
-#endif
+#endif /* _WIN32 */
char *gpf_path;
- const char *pf_path;
+ char *pf_path;
int gpf_open_errno, pf_open_errno;
int err;
#ifdef HAVE_LIBPCAP
gboolean capture_filter_specified = FALSE;
- guint packet_count = 0;
GList *if_list, *if_entry;
gchar err_str[PCAP_ERRBUF_SIZE];
#else
#endif
int out_file_type = WTAP_FILE_PCAP;
gchar *cf_name = NULL, *rfilter = NULL;
+#ifdef HAVE_LIBPCAP
+ gchar *if_text;
+#endif
dfilter_t *rfcode = NULL;
e_prefs *prefs;
char badopt;
+ ethereal_tap_list *tli;
/* Register all dissectors; we must do this before checking for the
- "-G" flag, as the "-G" flag dumps a list of fields registered
- by the dissectors, and we must do it before we read the preferences,
- in case any dissectors register preferences. */
+ "-G" flag, as the "-G" flag dumps information registered by the
+ dissectors, and we must do it before we read the preferences, in
+ case any dissectors register preferences. */
epan_init(PLUGIN_DIR,register_all_protocols,register_all_protocol_handoffs);
+ /* Register all tap listeners; we do this before we parse the arguments,
+ as the "-z" argument can specify a registered tap. */
+ register_all_tap_listeners();
+
/* Now register the preferences for any non-dissector modules.
We must do that before we read the preferences as well. */
prefs_register_modules();
- /* If invoked with the "-G" flag, we dump out a glossary of
- display filter symbols.
+ /* If invoked with the "-G" flag, we dump out information based on
+ the argument to the "-G" flag; if no argument is specified,
+ for backwards compatibility we dump out a glossary of display
+ filter symbols.
We do this here to mirror what happens in the GTK+ version, although
it's not necessary here. */
if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
- proto_registrar_dump();
+ if (argc == 2)
+ proto_registrar_dump_fields();
+ else {
+ if (strcmp(argv[2], "fields") == 0)
+ proto_registrar_dump_fields();
+ else if (strcmp(argv[2], "protocols") == 0)
+ proto_registrar_dump_protocols();
+ else {
+ fprintf(stderr, "tethereal: Invalid \"%s\" option for -G flag\n",
+ argv[2]);
+ exit(1);
+ }
+ }
exit(0);
}
if (pf_path != NULL) {
fprintf(stderr, "Can't open your preferences file \"%s\": %s.\n", pf_path,
strerror(pf_open_errno));
+ g_free(pf_path);
+ pf_path = NULL;
}
/* Set the name resolution code's flags from the preferences. */
g_resolv_flags = prefs->name_resolve;
-#ifdef WIN32
+#ifdef _WIN32
/* Load Wpcap, if possible */
load_wpcap();
#endif
-
- /* Initialize the capture file struct */
- cfile.plist = NULL;
- cfile.plist_end = NULL;
- cfile.wth = NULL;
- cfile.filename = NULL;
- cfile.user_saved = FALSE;
- cfile.is_tempfile = FALSE;
- cfile.rfcode = NULL;
- cfile.dfilter = NULL;
- cfile.dfcode = NULL;
-#ifdef HAVE_LIBPCAP
- cfile.cfilter = g_strdup("");
-#endif
- cfile.iface = NULL;
- cfile.save_file = NULL;
- cfile.save_file_fd = -1;
- cfile.snap = WTAP_MAX_PACKET_SIZE;
- cfile.count = 0;
-#ifdef HAVE_LIBPCAP
- cfile.autostop_duration = 0;
- cfile.autostop_filesize = 0;
- cfile.ringbuffer_on = FALSE;
- cfile.ringbuffer_num_files = RINGBUFFER_MIN_NUM_FILES;
-#endif
- col_init(&cfile.cinfo, prefs->num_cols);
- /* Assemble the compile-time options */
- comp_info_str = g_string_new("");
+ init_cap_file(&cfile);
- g_string_append(comp_info_str, "with ");
- g_string_sprintfa(comp_info_str,
-#ifdef GLIB_MAJOR_VERSION
- "GLib %d.%d.%d", GLIB_MAJOR_VERSION, GLIB_MINOR_VERSION,
- GLIB_MICRO_VERSION);
-#else
- "GLib (version unknown)");
-#endif
+ /* Assemble the compile-time version information string */
+ comp_info_str = g_string_new("Compiled ");
+ get_compiled_version_info(comp_info_str);
-#ifdef HAVE_LIBPCAP
- g_string_append(comp_info_str, ", with libpcap ");
-#ifdef HAVE_PCAP_VERSION
- g_string_append(comp_info_str, pcap_version);
-#else /* HAVE_PCAP_VERSION */
- g_string_append(comp_info_str, "(version unknown)");
-#endif /* HAVE_PCAP_VERSION */
-#else /* HAVE_LIBPCAP */
- g_string_append(comp_info_str, ", without libpcap");
-#endif /* HAVE_LIBPCAP */
+ /* Assemble the run-time version information string */
+ runtime_info_str = g_string_new("Running ");
+ get_runtime_version_info(runtime_info_str);
-#ifdef HAVE_LIBZ
- g_string_append(comp_info_str, ", with libz ");
-#ifdef ZLIB_VERSION
- g_string_append(comp_info_str, ZLIB_VERSION);
-#else /* ZLIB_VERSION */
- g_string_append(comp_info_str, "(version unknown)");
-#endif /* ZLIB_VERSION */
-#else /* HAVE_LIBZ */
- g_string_append(comp_info_str, ", without libz");
-#endif /* HAVE_LIBZ */
-
-/* Oh, this is pretty */
-#if defined(HAVE_UCD_SNMP_SNMP_H)
- g_string_append(comp_info_str, ", with UCD SNMP ");
-#ifdef HAVE_UCD_SNMP_VERSION_H
- g_string_append(comp_info_str, VersionInfo);
-#else /* HAVE_UCD_SNMP_VERSION_H */
- g_string_append(comp_info_str, "(version unknown)");
-#endif /* HAVE_UCD_SNMP_VERSION_H */
-#elif defined(HAVE_SNMP_SNMP_H)
- g_string_append(comp_info_str, ", with CMU SNMP ");
-#ifdef HAVE_SNMP_VERSION_H
- g_string_append(comp_info_str, snmp_Version());
-#else /* HAVE_SNMP_VERSION_H */
- g_string_append(comp_info_str, "(version unknown)");
-#endif /* HAVE_SNMP_VERSION_H */
-#else /* no SNMP */
- g_string_append(comp_info_str, ", without SNMP");
-#endif
-
/* Now get our args */
- while ((opt = getopt(argc, argv, "a:b:c:Df:F:hi:lnN:o:pr:R:s:t:vw:Vx")) != EOF) {
+ while ((opt = getopt(argc, argv, "a:b:c:d:Df:F:hi:lnN:o:pqr:R:s:St:vw:Vxz:")) != -1) {
switch (opt) {
case 'a': /* autostop criteria */
#ifdef HAVE_LIBPCAP
if (set_autostop_criterion(optarg) == FALSE) {
- fprintf(stderr, "ethereal: Invalid or unknown -a flag \"%s\"\n", optarg);
- exit(1);
+ fprintf(stderr, "tethereal: Invalid or unknown -a flag \"%s\"\n", optarg);
+ exit(1);
}
#else
capture_option_specified = TRUE;
break;
case 'b': /* Ringbuffer option */
#ifdef HAVE_LIBPCAP
- cfile.ringbuffer_on = TRUE;
- cfile.ringbuffer_num_files = get_positive_int(optarg, "number of ring buffer files");
+ capture_opts.ringbuffer_on = TRUE;
+ if (get_ring_arguments(optarg) == FALSE) {
+ fprintf(stderr, "tethereal: Invalid or unknown -b arg \"%s\"\n", optarg);
+ exit(1);
+ }
#else
capture_option_specified = TRUE;
arg_error = TRUE;
break;
case 'c': /* Capture xxx packets */
#ifdef HAVE_LIBPCAP
- packet_count = get_positive_int(optarg, "packet count");
+ capture_opts.autostop_count =
+ get_positive_int(optarg, "packet count");
#else
capture_option_specified = TRUE;
arg_error = TRUE;
#endif
break;
+ case 'd': /* Decode as rule */
+ if (!add_decode_as(optarg))
+ exit(1);
+ break;
case 'D': /* Print a list of capture devices */
#ifdef HAVE_LIBPCAP
if_list = get_interface_list(&err, err_str);
case 'f':
#ifdef HAVE_LIBPCAP
capture_filter_specified = TRUE;
+ if (cfile.cfilter)
+ g_free(cfile.cfilter);
cfile.cfilter = g_strdup(optarg);
#else
capture_option_specified = TRUE;
}
break;
case 'h': /* Print help and exit */
- print_usage();
+ print_usage(TRUE);
exit(0);
break;
case 'i': /* Use interface xxx */
break;
case 'p': /* Don't capture in promiscuous mode */
#ifdef HAVE_LIBPCAP
- promisc_mode = 0;
+ capture_opts.promisc_mode = FALSE;
#else
capture_option_specified = TRUE;
arg_error = TRUE;
#endif
break;
+ case 'q': /* Quiet */
+ quiet = TRUE;
+ break;
case 'r': /* Read capture file xxx */
cf_name = g_strdup(optarg);
break;
break;
case 's': /* Set the snapshot (capture) length */
#ifdef HAVE_LIBPCAP
- cfile.snap = get_positive_int(optarg, "snapshot length");
+ capture_opts.snaplen = get_positive_int(optarg, "snapshot length");
#else
capture_option_specified = TRUE;
arg_error = TRUE;
#endif
break;
+ case 'S': /* show packets in real time */
+ decode = TRUE;
+ break;
case 't': /* Time stamp type */
if (strcmp(optarg, "r") == 0)
timestamp_type = RELATIVE;
}
break;
case 'v': /* Show version and exit */
- printf("t%s %s, %s\n", PACKAGE, VERSION, comp_info_str->str);
+ printf("t%s %s\n%s\n%s\n", PACKAGE, VERSION, comp_info_str->str,
+ runtime_info_str->str);
exit(0);
break;
case 'w': /* Write to capture file xxx */
case 'x': /* Print packet data in hex (and ASCII) */
print_hex = TRUE;
break;
+ case 'z':
+ for(tli=tap_list;tli;tli=tli->next){
+ if(!strncmp(tli->cmd,optarg,strlen(tli->cmd))){
+ (*tli->func)(optarg);
+ break;
+ }
+ }
+ if(!tli){
+ fprintf(stderr,"tethereal: invalid -z argument.\n");
+ fprintf(stderr," -z argument must be one of :\n");
+ for(tli=tap_list;tli;tli=tli->next){
+ fprintf(stderr," %s\n",tli->cmd);
+ }
+ exit(1);
+ }
+ break;
+ default:
+ case '?': /* Bad flag - print usage message */
+ arg_error = TRUE;
+ break;
}
}
-
+
/* If no capture filter or read filter has been specified, and there are
still command-line arguments, treat them as the tokens of a capture
filter (if no "-r" flag was specified) or a read filter (if a "-r"
}
}
+ /* See if we're writing a capture file and the file is a pipe */
+#ifdef HAVE_LIBPCAP
+ ld.output_to_pipe = FALSE;
+#endif
+ if (cfile.save_file != NULL) {
+ if (strcmp(cfile.save_file, "-") == 0) {
+ /* stdout */
+ g_free(cfile.save_file);
+ cfile.save_file = g_strdup("");
+#ifdef HAVE_LIBPCAP
+ ld.output_to_pipe = TRUE;
+#endif
+ }
+#ifdef HAVE_LIBPCAP
+ else {
+ err = test_for_fifo(cfile.save_file);
+ switch (err) {
+
+ case ENOENT: /* it doesn't exist, so we'll be creating it,
+ and it won't be a FIFO */
+ case 0: /* found it, but it's not a FIFO */
+ break;
+
+ case ESPIPE: /* it is a FIFO */
+ ld.output_to_pipe = TRUE;
+ break;
+
+ default: /* couldn't stat it */
+ fprintf(stderr,
+ "tethereal: Error testing whether capture file is a pipe: %s\n",
+ strerror(errno));
+ exit(2);
+ }
+ }
+#endif
+ }
+
#ifdef HAVE_LIBPCAP
/* If they didn't specify a "-w" flag, but specified a maximum capture
file size, tell them that this doesn't work, and exit. */
- if (cfile.autostop_filesize != 0 && cfile.save_file == NULL) {
- fprintf(stderr, "tethereal: Maximum capture file size specified, but capture isn't being saved to a file.\n");
+ if (capture_opts.has_autostop_filesize && cfile.save_file == NULL) {
+ fprintf(stderr, "tethereal: Maximum capture file size specified, but "
+ "capture isn't being saved to a file.\n");
exit(2);
}
- if (cfile.ringbuffer_on) {
+ if (capture_opts.ringbuffer_on) {
/* Ring buffer works only under certain conditions:
a) ring buffer does not work if you're not saving the capture to
a file;
- b) it makes no sense to enable the ring buffer if the maximum
- file size is set to "infinite". */
+ b) ring buffer only works if you're saving in libpcap format;
+ c) it makes no sense to enable the ring buffer if the maximum
+ file size is set to "infinite";
+ d) file must not be a pipe. */
if (cfile.save_file == NULL) {
- fprintf(stderr, "tethereal: Ring buffer requested, but capture isn't being saved to a file.\n");
+ fprintf(stderr, "tethereal: Ring buffer requested, but "
+ "capture isn't being saved to a file.\n");
+ exit(2);
+ }
+ if (out_file_type != WTAP_FILE_PCAP) {
+ fprintf(stderr, "tethereal: Ring buffer requested, but "
+ "capture isn't being saved in libpcap format.\n");
exit(2);
}
- if (cfile.autostop_filesize == 0) {
- fprintf(stderr, "tethereal: Ring buffer requested, but no maximum capture file size was specified.\n");
+ if (!capture_opts.has_autostop_filesize) {
+ fprintf(stderr, "tethereal: Ring buffer requested, but "
+ "no maximum capture file size was specified.\n");
+ exit(2);
+ }
+ if (ld.output_to_pipe) {
+ fprintf(stderr, "tethereal: Ring buffer requested, but "
+ "capture file is a pipe.\n");
exit(2);
}
}
#endif
-#ifdef WIN32
+#ifdef _WIN32
/* Start windows sockets */
WSAStartup( MAKEWORD( 1, 1 ), &wsaData );
-#endif
+#endif /* _WIN32 */
/* Notify all registered modules that have had any of their preferences
changed either from one of the preferences file or from the command
- line that its preferences have changed. */
+ line that their preferences have changed. */
prefs_apply_all();
#ifndef HAVE_LIBPCAP
if (capture_option_specified)
fprintf(stderr, "This version of Tethereal was not built with support for capturing packets.\n");
#endif
- if (arg_error)
- print_usage();
+ if (arg_error) {
+ print_usage(FALSE);
+ exit(1);
+ }
- /* Build the column format array */
+ /* Build the column format array */
+ col_setup(&cfile.cinfo, prefs->num_cols);
for (i = 0; i < cfile.cinfo.num_cols; i++) {
cfile.cinfo.col_fmt[i] = get_column_format(i);
cfile.cinfo.col_title[i] = g_strdup(get_column_title(i));
cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_INFO_LEN);
else
cfile.cinfo.col_buf[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
+ cfile.cinfo.col_fence[i] = 0;
+ cfile.cinfo.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
+ cfile.cinfo.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);
}
#ifdef HAVE_LIBPCAP
- if (cfile.snap < 1)
- cfile.snap = WTAP_MAX_PACKET_SIZE;
- else if (cfile.snap < MIN_PACKET_SIZE)
- cfile.snap = MIN_PACKET_SIZE;
-
+ if (capture_opts.snaplen < 1)
+ capture_opts.snaplen = WTAP_MAX_PACKET_SIZE;
+ else if (capture_opts.snaplen < MIN_PACKET_SIZE)
+ capture_opts.snaplen = MIN_PACKET_SIZE;
+
/* Check the value range of the ringbuffer_num_files parameter */
- if (cfile.ringbuffer_num_files < RINGBUFFER_MIN_NUM_FILES)
- cfile.ringbuffer_num_files = RINGBUFFER_MIN_NUM_FILES;
- else if (cfile.ringbuffer_num_files > RINGBUFFER_MAX_NUM_FILES)
- cfile.ringbuffer_num_files = RINGBUFFER_MAX_NUM_FILES;
+ if (capture_opts.ringbuffer_num_files < RINGBUFFER_MIN_NUM_FILES)
+ capture_opts.ringbuffer_num_files = RINGBUFFER_MIN_NUM_FILES;
+ else if (capture_opts.ringbuffer_num_files > RINGBUFFER_MAX_NUM_FILES)
+ capture_opts.ringbuffer_num_files = RINGBUFFER_MAX_NUM_FILES;
#endif
-
+
if (rfilter != NULL) {
if (!dfilter_compile(rfilter, &rfcode)) {
fprintf(stderr, "tethereal: %s\n", dfilter_error_msg);
/* No - is a default specified in the preferences file? */
if (prefs->capture_device != NULL) {
/* Yes - use it. */
- cfile.iface = g_strdup(prefs->capture_device);
+ if_text = strrchr(prefs->capture_device, ' ');
+ if (if_text == NULL) {
+ cfile.iface = g_strdup(prefs->capture_device);
+ } else {
+ cfile.iface = g_strdup(if_text + 1); /* Skip over space */
+ }
} else {
/* No - pick the first one from the list of interfaces. */
if_list = get_interface_list(&err, err_str);
}
exit(2);
}
- cfile.iface = g_strdup(if_list->data); /* first interface */
+ if_text = strrchr(if_list->data, ' '); /* first interface */
+ if (if_text == NULL) {
+ cfile.iface = g_strdup(if_list->data);
+ } else {
+ cfile.iface = g_strdup(if_text + 1); /* Skip over space */
+ }
free_interface_list(if_list);
}
}
- capture(packet_count, out_file_type);
+ capture(out_file_type);
- if (cfile.ringbuffer_on) {
+ if (capture_opts.ringbuffer_on) {
ringbuf_free();
}
#else
#endif
}
+ draw_tap_listeners(TRUE);
epan_cleanup();
return 0;
/* Do the low-level work of a capture.
Returns TRUE if it succeeds, FALSE otherwise. */
static int
-capture(volatile int packet_count, int out_file_type)
+capture(int out_file_type)
{
+ int pcap_encap;
+ int file_snaplen;
gchar open_err_str[PCAP_ERRBUF_SIZE];
gchar lookup_net_err_str[PCAP_ERRBUF_SIZE];
bpf_u_int32 netnum, netmask;
struct bpf_program fcode;
void (*oldhandler)(int);
- int err;
- volatile int inpkts = 0;
+ int err = 0;
+ int volatile volatile_err = 0;
+ int volatile inpkts = 0;
+ int pcap_cnt;
char errmsg[1024+1];
- condition *cnd_stop_capturesize;
- condition *cnd_stop_timeout;
+ condition *volatile cnd_stop_capturesize = NULL;
+ condition *volatile cnd_stop_timeout = NULL;
+ condition *volatile cnd_ring_timeout = NULL;
#ifndef _WIN32
static const char ppamsg[] = "can't find PPA for ";
char *libpcap_warn;
+ volatile int pipe_fd = -1;
+ struct pcap_hdr hdr;
+ struct pcaprec_modified_hdr rechdr;
+ guchar pcap_data[WTAP_MAX_PACKET_SIZE];
#endif
struct pcap_stat stats;
+ gboolean write_err;
gboolean dump_ok;
- /* Initialize the table of conversations. */
- epan_conversation_init();
-
- /* Initialize protocol-specific variables */
- init_all_protocols();
-
- /* Initialize the common data structures for fragment reassembly.
- Must be done *after* "init_all_protocols()", as "init_all_protocols()"
- may free up space for fragments, which it finds by using the
- data structures that "reassemble_init()" frees. */
- reassemble_init();
+ /* Initialize all data structures used for dissection. */
+ init_dissection();
ld.linktype = WTAP_ENCAP_UNKNOWN;
ld.pdh = NULL;
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';
- ld.pch = pcap_open_live(cfile.iface, cfile.snap, promisc_mode, 1000,
- open_err_str);
+ ld.pch = pcap_open_live(cfile.iface, capture_opts.snaplen,
+ capture_opts.promisc_mode, 1000, open_err_str);
if (ld.pch == NULL) {
- /* Well, we couldn't start the capture. */
+ /* We couldn't open "cfile.iface" as a network device. */
#ifdef _WIN32
+ /* On Windows, we don't support capturing on pipes, so we give up. */
+
/* On Win32 OSes, the capture devices are probably available to all
users; don't warn about permissions problems.
- Do, however, warn that Token Ring and PPP devices aren't supported. */
+ Do, however, warn that WAN devices aren't supported. */
snprintf(errmsg, sizeof errmsg,
"The capture session could not be initiated (%s).\n"
"Please check that you have the proper interface specified.\n"
"\n"
- "Note that the driver Tethereal uses for packet capture on Windows\n"
- "doesn't support capturing on Token Ring interfaces, and doesn't\n"
- "support capturing on PPP/WAN interfaces in Windows NT/2000.\n",
+ "Note that the driver Tethereal 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
- /* 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 Tethereal with a version of the libpcap library\n"
- "that doesn't handle HP-UX network devices well; this means that\n"
- "Tethereal 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 specified.%s", open_err_str, libpcap_warn);
+ /* try to open cfile.iface as a pipe */
+ pipe_fd = pipe_open_live(cfile.iface, &hdr, &ld, errmsg, sizeof errmsg);
+
+ if (pipe_fd == -1) {
+
+ 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 Tethereal 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 Tethereal with a version of the libpcap library\n"
+ "that doesn't handle HP-UX network devices well; this means that\n"
+ "Tethereal 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 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
- goto error;
}
- if (cfile.cfilter) {
+ if (cfile.cfilter && !ld.from_pipe) {
/* A capture filter was specified; set it up. */
if (pcap_lookupnet(cfile.iface, &netnum, &netmask, lookup_net_err_str) < 0) {
/*
* only for filters that check for broadcast IP addresses, so
* we just warn the user, and punt and use 0.
*/
- fprintf(stderr,
+ fprintf(stderr,
"Warning: Couldn't obtain netmask info (%s).\n", lookup_net_err_str);
netmask = 0;
}
}
}
- ld.linktype = wtap_pcap_encap_to_wtap_encap(get_pcap_linktype(ld.pch,
- cfile.iface));
+ /* Set up to write to the capture file. */
+#ifndef _WIN32
+ if (ld.from_pipe) {
+ pcap_encap = hdr.network;
+ file_snaplen = hdr.snaplen;
+ } else
+#endif
+ {
+ pcap_encap = get_pcap_linktype(ld.pch, cfile.iface);
+ file_snaplen = pcap_snapshot(ld.pch);
+ }
+ ld.linktype = wtap_pcap_encap_to_wtap_encap(pcap_encap);
if (cfile.save_file != NULL) {
/* Set up to write to the capture file. */
if (ld.linktype == WTAP_ENCAP_UNKNOWN) {
" that Tethereal doesn't support.");
goto error;
}
- if (cfile.ringbuffer_on) {
+ if (capture_opts.ringbuffer_on) {
cfile.save_file_fd = ringbuf_init(cfile.save_file,
- cfile.ringbuffer_num_files);
+ capture_opts.ringbuffer_num_files);
if (cfile.save_file_fd != -1) {
ld.pdh = ringbuf_init_wtap_dump_fdopen(out_file_type, ld.linktype,
pcap_snapshot(ld.pch), &err);
} else {
+ err = errno; /* "ringbuf_init()" failed */
ld.pdh = NULL;
}
} else {
}
if (ld.pdh == NULL) {
- snprintf(errmsg, sizeof errmsg, file_open_error_message(errno, TRUE),
- cfile.save_file);
+ snprintf(errmsg, sizeof errmsg,
+ file_open_error_message(err, TRUE, out_file_type),
+ *cfile.save_file == '\0' ? "stdout" : cfile.save_file);
goto error;
}
}
if (open_err_str[0] != '\0')
fprintf(stderr, "tethereal: WARNING: %s.\n", open_err_str);
+#ifdef _WIN32
+ /* Catch a CTRL+C event and, if we get it, clean up and exit. */
+ SetConsoleCtrlHandler(capture_cleanup, TRUE);
+#else /* _WIN32 */
/* Catch SIGINT and SIGTERM and, if we get either of them, clean up
and exit.
- XXX - deal with signal semantics on various platforms. Or just
+ XXX - deal with signal semantics on various UNIX platforms. Or just
use "sigaction()" and be done with it? */
signal(SIGTERM, capture_cleanup);
signal(SIGINT, capture_cleanup);
-#if !defined(WIN32)
if ((oldhandler = signal(SIGHUP, capture_cleanup)) != SIG_DFL)
signal(SIGHUP, oldhandler);
-#endif
+
+#ifdef SIGINFO
+ /* Catch SIGINFO and, if we get it and we're capturing to a file in
+ quiet mode, report the number of packets we've captured. */
+ signal(SIGINFO, report_counts_siginfo);
+#endif /* SIGINFO */
+#endif /* _WIN32 */
/* Let the user know what interface was chosen. */
fprintf(stderr, "Capturing on %s\n", cfile.iface);
- fflush(stderr);
- /* initialize capture stop conditions */
+ /* initialize capture stop conditions */
init_capture_stop_conditions();
/* create stop conditions */
- cnd_stop_capturesize = cnd_new((char*)CND_CLASS_CAPTURESIZE,
- (long)cfile.autostop_filesize * 1000);
- cnd_stop_timeout = cnd_new((char*)CND_CLASS_TIMEOUT,
- (gint32)cfile.autostop_duration);
-
- if (packet_count == 0)
- packet_count = -1; /* infinite capturng */
- if (!setjmp(ld.stopenv))
+ if (capture_opts.has_autostop_filesize)
+ cnd_stop_capturesize = cnd_new((const char*)CND_CLASS_CAPTURESIZE,
+ (long)capture_opts.autostop_filesize * 1000);
+ if (capture_opts.has_autostop_duration)
+ cnd_stop_timeout = cnd_new((const char*)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);
+
+ if (!setjmp(ld.stopenv)) {
ld.go = TRUE;
- else
+ ld.packet_count = 0;
+ } else
ld.go = FALSE;
while (ld.go) {
- if (packet_count > 0)
- packet_count--;
- inpkts = pcap_dispatch(ld.pch, 1, capture_pcap_cb, (u_char *) &ld);
- if (packet_count == 0 || inpkts < 0) {
+ /* We need to be careful with automatic variables defined in the
+ outer scope which are changed inside the loop. Most compilers
+ don't try to roll them back to their original values after the
+ longjmp which causes the loop to finish, but all that the
+ standards say is that their values are indeterminate. If we
+ don't want them to be rolled back, we should define them with the
+ volatile attribute (paraphrasing W. Richard Stevens, Advanced
+ Programming in the UNIX Environment, p. 178).
+
+ The "err" variable causes a particular problem. If we give it
+ the volatile attribute, then when we pass a reference to it (as
+ in "&err") to a function, GCC warns: "passing arg <n> of
+ <function> discards qualifiers from pointer target type".
+ Therefore within the loop and just beyond we don't use "err".
+ Within the loop we define "loop_err", and assign its value to
+ "volatile_err", which is in the outer scope and is checked when
+ the loop finishes.
+
+ We also define "packet_count_prev" here to keep things tidy,
+ since it's used only inside the loop. If it were defined in the
+ outer scope, GCC would give a warning (unnecessary in this case)
+ that it might be clobbered, and we'd need to give it the volatile
+ attribute to suppress the warning. */
+
+ int loop_err = 0;
+ int packet_count_prev = 0;
+
+ if (cnd_stop_capturesize == NULL && cnd_stop_timeout == NULL) {
+ /* We're not stopping at a particular capture file size, and we're
+ not stopping after some particular amount of time has expired,
+ so either we have no stop condition or the only stop condition
+ is a maximum packet count.
+
+ If there's no maximum packet count, pass it -1, meaning "until
+ you run out of packets in the bufferful you read". Otherwise,
+ pass it the number of packets we have left to capture.
+
+ We don't call "pcap_loop()" as, if we're saving to a file that's
+ a FIFO, we want to flush the FIFO after we're done processing
+ this libpcap bufferful of packets, so that the program
+ reading the FIFO sees the packets immediately and doesn't get
+ any partial packet, forcing it to block in the middle of reading
+ that packet. */
+ if (capture_opts.autostop_count == 0)
+ pcap_cnt = -1;
+ else {
+ if (ld.packet_count >= capture_opts.autostop_count) {
+ /* XXX do we need this test here? */
+ /* It appears there's nothing more to capture. */
+ break;
+ }
+ pcap_cnt = capture_opts.autostop_count - ld.packet_count;
+ }
+ } else {
+ /* We need to check the capture file size or the timeout after
+ each packet. */
+ pcap_cnt = 1;
+ }
+#ifndef _WIN32
+ if (ld.from_pipe) {
+ inpkts = pipe_dispatch(pipe_fd, &ld, &hdr, &rechdr, pcap_data,
+ errmsg, sizeof errmsg);
+ } else
+#endif
+ inpkts = pcap_dispatch(ld.pch, pcap_cnt, capture_pcap_cb, (guchar *) &ld);
+ if (inpkts < 0) {
+ /* Error from "pcap_dispatch()", or error or "no more packets" from
+ "pipe_dispatch(). */
ld.go = FALSE;
- } else if (cnd_eval(cnd_stop_timeout) == TRUE) {
+ } else if (cnd_stop_timeout != NULL && cnd_eval(cnd_stop_timeout)) {
/* The specified capture time has elapsed; stop the capture. */
ld.go = FALSE;
- } else if (ld.pdh != NULL && (cnd_eval(cnd_stop_capturesize,
- (guint32)wtap_get_bytes_dumped(ld.pdh))) == TRUE){
- /* We're saving the capture to a file, and the capture file reached
- its maximum size. */
- if (cfile.ringbuffer_on) {
- /* Switch to the next ringbuffer file */
- if (ringbuf_switch_file(&cfile, &ld.pdh, &err) == TRUE) {
- /* File switch failed: reset the condition */
- cnd_reset(cnd_stop_capturesize);
+ } 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, &loop_err)) {
+ /* File switch succeeded: reset the condition */
+ cnd_reset(cnd_ring_timeout);
+ } else {
+ /* File switch failed: stop here */
+ ld.go = FALSE;
+ }
+ } else if (inpkts > 0) {
+ if (capture_opts.autostop_count != 0 &&
+ ld.packet_count >= capture_opts.autostop_count) {
+ /* The specified number of packets have been captured and have
+ passed both any capture filter in effect and any read filter
+ in effect. */
+ ld.go = FALSE;
+ } else if (cnd_stop_capturesize != NULL &&
+ cnd_eval(cnd_stop_capturesize,
+ (guint32)wtap_get_bytes_dumped(ld.pdh))) {
+ /* We're saving the capture to a file, and the capture file reached
+ its maximum size. */
+ if (capture_opts.ringbuffer_on) {
+ /* Switch to the next ringbuffer file */
+ if (ringbuf_switch_file(&cfile, &ld.pdh, &loop_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 */
+ volatile_err = loop_err;
+ ld.go = FALSE;
+ }
} else {
- /* File switch failed: stop here */
+ /* No ringbuffer - just stop. */
ld.go = FALSE;
- continue;
}
- } else {
- /* No ringbuffer - just stop. */
- ld.go = FALSE;
}
- }
- }
-
- /* delete stop conditions */
- cnd_delete(cnd_stop_capturesize);
- cnd_delete(cnd_stop_timeout);
+ if (ld.output_to_pipe) {
+ if (ld.packet_count > packet_count_prev) {
+ if (fflush(wtap_dump_file(ld.pdh))) {
+ volatile_err = errno;
+ ld.go = FALSE;
+ }
+ packet_count_prev = ld.packet_count;
+ }
+ }
+ } /* inpkts > 0 */
+ } /* while (ld.go) */
- if (cfile.save_file != NULL) {
+ /* 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 ((cfile.save_file != NULL) && !quiet) {
/* We're saving to a file, which means we're printing packet counts
- to the standard output. Send a newline so that we move to the
- line after the packet count. */
+ to stderr if we are not running silent and deep.
+ Send a newline so that we move to the line after the packet count. */
fprintf(stderr, "\n");
}
/* If we got an error while capturing, report it. */
if (inpkts < 0) {
- fprintf(stderr, "tethereal: Error while capturing packets: %s\n",
- pcap_geterr(ld.pch));
- }
-
- /* Get the capture statistics, and, if any packets were dropped, report
- that. */
- if (pcap_stats(ld.pch, &stats) >= 0) {
- if (stats.ps_drop != 0) {
- fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
+#ifndef _WIN32
+ if (ld.from_pipe) {
+ if (ld.pipe_err == PIPERR) {
+ fprintf(stderr, "tethereal: Error while capturing packets: %s\n",
+ errmsg);
+ }
+ } else
+#endif
+ {
+ fprintf(stderr, "tethereal: Error while capturing packets: %s\n",
+ pcap_geterr(ld.pch));
}
- } else {
- fprintf(stderr, "tethereal: Can't get packet-drop statistics: %s\n",
- pcap_geterr(ld.pch));
}
- pcap_close(ld.pch);
+ if (volatile_err == 0)
+ write_err = FALSE;
+ else {
+ show_capture_file_io_error(cfile.save_file, volatile_err, FALSE);
+ write_err = TRUE;
+ }
if (cfile.save_file != NULL) {
/* We're saving to a file or files; close all files. */
- if (cfile.ringbuffer_on) {
+ if (capture_opts.ringbuffer_on) {
dump_ok = ringbuf_wtap_dump_close(&cfile, &err);
} else {
dump_ok = wtap_dump_close(ld.pdh, &err);
}
- if (!dump_ok)
+ /* If we've displayed a message about a write error, there's no point
+ in displaying another message about an error on close. */
+ if (!dump_ok && !write_err)
show_capture_file_io_error(cfile.save_file, err, TRUE);
}
+#ifndef _WIN32
+ if (ld.from_pipe && pipe_fd >= 0)
+ close(pipe_fd);
+ else
+#endif
+ {
+ /* Get the capture statistics, and, if any packets were dropped, report
+ that. */
+ if (pcap_stats(ld.pch, &stats) >= 0) {
+ if (stats.ps_drop != 0) {
+ fprintf(stderr, "%u packets dropped\n", stats.ps_drop);
+ }
+ } else {
+ fprintf(stderr, "tethereal: Can't get packet-drop statistics: %s\n",
+ pcap_geterr(ld.pch));
+ }
+ pcap_close(ld.pch);
+ }
+
+ /* Report the number of captured packets if not reported during capture
+ and we are saving to a file. */
+ report_counts();
+
return TRUE;
error:
- if (cfile.ringbuffer_on) {
+ if (capture_opts.ringbuffer_on) {
ringbuf_error_cleanup();
}
g_free(cfile.save_file);
cfile.save_file = NULL;
fprintf(stderr, "tethereal: %s\n", errmsg);
+#ifndef _WIN32
+ if (ld.from_pipe) {
+ if (pipe_fd >= 0)
+ close(pipe_fd);
+ } else
+#endif
+ {
if (ld.pch != NULL)
pcap_close(ld.pch);
+ }
return FALSE;
}
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;
cb_args_t args;
-
- 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;
+ int err;
+
+ /* Convert from libpcap to Wiretap format.
+ If that fails, ignore the packet (wtap_process_pcap_packet has
+ written an error message). */
+ pd = wtap_process_pcap_packet(ld->linktype, phdr, pd, &pseudo_header,
+ &whdr, &err);
+ if (pd == NULL) {
+ return;
+ }
args.cf = &cfile;
args.pdh = ld->pdh;
if (ld->pdh) {
- wtap_dispatch_cb_write((u_char *)&args, &whdr, 0, NULL, pd);
- fprintf(stderr, "\r%u ", cfile.count);
- fflush(stdout);
+ wtap_dispatch_cb_write((guchar *)&args, &whdr, 0, &pseudo_header, pd);
+ /* Report packet capture count if not quiet */
+ if (!quiet) {
+ if (!decode) {
+ if (ld->packet_count != 0) {
+ fprintf(stderr, "\r%u ", ld->packet_count);
+ /* stderr could be line buffered */
+ fflush(stderr);
+ }
+ } else {
+ wtap_dispatch_cb_print((guchar *)&args, &whdr, 0,
+ &pseudo_header, pd);
+ }
+ }
} else {
- wtap_dispatch_cb_print((u_char *)&args, &whdr, 0, NULL, pd);
+ wtap_dispatch_cb_print((guchar *)&args, &whdr, 0, &pseudo_header, pd);
}
}
+#ifdef _WIN32
+static BOOL WINAPI
+capture_cleanup(DWORD ctrltype _U_)
+{
+ /* CTRL_C_EVENT is sort of like SIGINT, CTRL_BREAK_EVENT is unique to
+ Windows, CTRL_CLOSE_EVENT is sort of like SIGHUP, CTRL_LOGOFF_EVENT
+ is also sort of like SIGHUP, and CTRL_SHUTDOWN_EVENT is sort of
+ like SIGTERM at least when the machine's shutting down.
+
+ For now, we handle them all as indications that we should clean up
+ and quit, just as we handle SIGINT, SIGHUP, and SIGTERM in that
+ way on UNIX.
+
+ However, as handlers run in a new thread, we can't just longjmp
+ out; we have to set "ld.go" to FALSE, and must return TRUE so that
+ no other handler - such as one that would terminate the process -
+ gets called.
+
+ XXX - for some reason, typing ^C to Tethereal, if you run this in
+ a Cygwin console window in at least some versions of Cygwin,
+ causes Tethereal to terminate immediately; this routine gets
+ called, but the main loop doesn't get a chance to run and
+ exit cleanly, at least if this is compiled with Microsoft Visual
+ C++ (i.e., it's a property of the Cygwin console window or Bash;
+ it happens if Tethereal is not built with Cygwin - for all I know,
+ building it with Cygwin may make the problem go away). */
+ ld.go = FALSE;
+ return TRUE;
+}
+#else
static void
-capture_cleanup(int signum)
+capture_cleanup(int signum _U_)
{
/* Longjmp back to the starting point; "pcap_dispatch()", on many
- platforms, just keeps looping if it gets EINTR, so if we set
+ UNIX platforms, just keeps looping if it gets EINTR, so if we set
"ld.go" to FALSE and return, we won't break out of it and quit
capturing. */
longjmp(ld.stopenv, 1);
}
+#endif /* _WIN32 */
+
+static void
+report_counts(void)
+{
+#ifdef SIGINFO
+ /* XXX - if we use sigaction, this doesn't have to be done.
+ (Yes, this isn't necessary on BSD, but just in case a system
+ where "signal()" has AT&T semantics adopts SIGINFO....) */
+ signal(SIGINFO, report_counts_siginfo);
+#endif /* SIGINFO */
+
+ if (cfile.save_file != NULL && quiet) {
+ /* Report the count only if we're capturing to a file (rather
+ than printing captured packet information out) and aren't
+ updating a count as packets arrive. */
+ fprintf(stderr, "%u packets captured\n", ld.packet_count);
+ }
+#ifdef SIGINFO
+ infoprint = FALSE; /* we just reported it */
+#endif /* SIGINFO */
+}
+
+#ifdef SIGINFO
+static void
+report_counts_siginfo(int signum _U_)
+{
+ int sav_errno = errno;
+ /* If we've been told to delay printing, just set a flag asking
+ that we print counts (if we're supposed to), otherwise print
+ the count of packets captured (if we're supposed to). */
+ if (infodelay)
+ infoprint = TRUE;
+ else
+ report_counts();
+ errno = sav_errno;
+}
+#endif /* SIGINFO */
#endif /* HAVE_LIBPCAP */
static int
load_cap_file(capture_file *cf, int out_file_type)
{
gint linktype;
+ int snapshot_length;
wtap_dumper *pdh;
int err;
int success;
linktype = wtap_file_encap(cf->wth);
if (cf->save_file != NULL) {
/* Set up to write to the capture file. */
+ snapshot_length = wtap_snapshot_length(cf->wth);
+ if (snapshot_length == 0) {
+ /* Snapshot length of input file not known. */
+ snapshot_length = WTAP_MAX_PACKET_SIZE;
+ }
pdh = wtap_dump_open(cf->save_file, out_file_type,
- linktype, wtap_snapshot_length(cf->wth), &err);
+ linktype, snapshot_length, &err);
if (pdh == NULL) {
/* We couldn't set up to write to the capture file. */
case WTAP_ERR_UNSUPPORTED_ENCAP:
case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
fprintf(stderr,
-"tethereal: The capture file being read cannot be written in that format.\n");
+ "tethereal: The capture file being read cannot be written in "
+ "that format.\n");
break;
case WTAP_ERR_CANT_OPEN:
fprintf(stderr,
-"tethereal: The file \"%s\" couldn't be created for some unknown reason.\n",
- cf->save_file);
+ "tethereal: The file \"%s\" couldn't be created for some "
+ "unknown reason.\n",
+ *cf->save_file == '\0' ? "stdout" : cf->save_file);
break;
case WTAP_ERR_SHORT_WRITE:
fprintf(stderr,
-"tethereal: A full header couldn't be written to the file \"%s\".\n",
- cf->save_file);
+ "tethereal: A full header couldn't be written to the file \"%s\".\n",
+ *cf->save_file == '\0' ? "stdout" : cf->save_file);
break;
default:
- if (err < 0) {
- fprintf(stderr,
- "tethereal: The file \"%s\" could not be opened: Error %d.\n",
- cf->save_file, err);
- } else {
- fprintf(stderr,
- "tethereal: The file \"%s\" could not be opened: %s\n.",
- cf->save_file, strerror(err));
- }
+ fprintf(stderr,
+ "tethereal: The file \"%s\" could not be created: %s\n.",
+ *cf->save_file == '\0' ? "stdout" : cf->save_file,
+ wtap_strerror(err));
break;
}
goto out;
}
args.cf = cf;
args.pdh = pdh;
- success = wtap_loop(cf->wth, 0, wtap_dispatch_cb_write, (u_char *) &args,
+ success = wtap_loop(cf->wth, 0, wtap_dispatch_cb_write, (guchar *) &args,
&err);
/* Now close the capture file. */
} else {
args.cf = cf;
args.pdh = NULL;
- success = wtap_loop(cf->wth, 0, wtap_dispatch_cb_print, (u_char *) &args,
+ success = wtap_loop(cf->wth, 0, wtap_dispatch_cb_print, (guchar *) &args,
&err);
}
if (!success) {
static void
fill_in_fdata(frame_data *fdata, capture_file *cf,
- const struct wtap_pkthdr *phdr,
- const union wtap_pseudo_header *pseudo_header, long offset)
+ const struct wtap_pkthdr *phdr, long offset)
{
- int i;
-
fdata->next = NULL;
fdata->prev = NULL;
fdata->pfd = NULL;
- fdata->data_src = NULL;
fdata->num = cf->count;
fdata->pkt_len = phdr->len;
fdata->cap_len = phdr->caplen;
cf->esec = fdata->rel_secs;
cf->eusec = fdata->rel_usecs;
}
-
+
/* Get the time elapsed between the previous displayed packet and
this packet. */
compute_timestamp_diff(&fdata->del_secs, &fdata->del_usecs,
{
if (fdata->pfd)
g_slist_free(fdata->pfd);
- if (fdata->data_src)
- g_slist_free(fdata->data_src);
}
static void
-wtap_dispatch_cb_write(u_char *user, const struct wtap_pkthdr *phdr,
- long offset, union wtap_pseudo_header *pseudo_header, const u_char *buf)
+wtap_dispatch_cb_write(guchar *user, const struct wtap_pkthdr *phdr,
+ long offset, union wtap_pseudo_header *pseudo_header, const guchar *buf)
{
cb_args_t *args = (cb_args_t *) user;
capture_file *cf = args->cf;
gboolean passed;
epan_dissect_t *edt;
+#ifdef HAVE_LIBPCAP
+#ifdef SIGINFO
+ /*
+ * Prevent a SIGINFO handler from writing to stdout while we're
+ * doing so; instead, have it just set a flag telling us to print
+ * that information when we're done.
+ */
+ infodelay = TRUE;
+#endif /* SIGINFO */
+#endif /* HAVE_LIBPCAP */
+
cf->count++;
if (cf->rfcode) {
- fill_in_fdata(&fdata, cf, phdr, pseudo_header, offset);
+ fill_in_fdata(&fdata, cf, phdr, offset);
edt = epan_dissect_new(TRUE, FALSE);
epan_dissect_prime_dfilter(edt, cf->rfcode);
epan_dissect_run(edt, pseudo_header, buf, &fdata, NULL);
edt = NULL;
}
if (passed) {
+ /* The packet passed the read filter. */
+#ifdef HAVE_LIBPCAP
+ ld.packet_count++;
+#endif
if (!wtap_dump(pdh, phdr, pseudo_header, buf, &err)) {
#ifdef HAVE_LIBPCAP
- if (ld.pch != NULL) {
- /* We're capturing packets, so we're printing a count of packets
- captured; move to the line after the count. */
+ if (ld.pch != NULL && !quiet) {
+ /* We're capturing packets, so (if -q not specified) we're printing
+ a count of packets captured; move to the line after the count. */
fprintf(stderr, "\n");
}
#endif
epan_dissect_free(edt);
if (cf->rfcode)
clear_fdata(&fdata);
+
+#ifdef HAVE_LIBPCAP
+#ifdef SIGINFO
+ /*
+ * Allow SIGINFO handlers to write.
+ */
+ infodelay = FALSE;
+
+ /*
+ * If a SIGINFO handler asked us to write out capture counts, do so.
+ */
+ if (infoprint)
+ report_counts();
+#endif /* SIGINFO */
+#endif /* HAVE_LIBPCAP */
}
static void
show_capture_file_io_error(const char *fname, int err, gboolean is_close)
{
+ if (*fname == '\0')
+ fname = "stdout";
+
switch (err) {
case ENOSPC:
}
static void
-wtap_dispatch_cb_print(u_char *user, const struct wtap_pkthdr *phdr,
- long offset, union wtap_pseudo_header *pseudo_header, const u_char *buf)
+wtap_dispatch_cb_print(guchar *user, const struct wtap_pkthdr *phdr,
+ long offset, union wtap_pseudo_header *pseudo_header, const guchar *buf)
{
cb_args_t *args = (cb_args_t *) user;
capture_file *cf = args->cf;
cf->count++;
- fill_in_fdata(&fdata, cf, phdr, pseudo_header, offset);
+ fill_in_fdata(&fdata, cf, phdr, offset);
+
+ /* Grab any resolved addresses */
+ if (g_resolv_flags) {
+ host_name_lookup_process(NULL);
+ }
passed = TRUE;
- if (cf->rfcode || verbose)
+ if (cf->rfcode || verbose || num_tap_filters!=0)
create_proto_tree = TRUE;
else
create_proto_tree = FALSE;
We only need the columns if we're *not* verbose; in verbose mode,
we print the protocol tree, not the protocol summary. */
+
edt = epan_dissect_new(create_proto_tree, verbose);
if (cf->rfcode) {
epan_dissect_prime_dfilter(edt, cf->rfcode);
}
+
+ tap_queue_init(edt);
epan_dissect_run(edt, pseudo_header, buf, &fdata, verbose ? NULL : &cf->cinfo);
+ tap_push_tapped_queue(edt);
+
if (cf->rfcode) {
passed = dfilter_apply_edt(cf->rfcode, edt);
}
if (passed) {
/* The packet passed the read filter. */
+#ifdef HAVE_LIBPCAP
+ ld.packet_count++;
+#endif
if (verbose) {
/* Print the information in the protocol tree. */
print_args.to_file = TRUE;
print_args.print_hex = print_hex;
print_args.expand_all = TRUE;
print_args.suppress_unmarked = FALSE;
- proto_tree_print(FALSE, &print_args, (GNode *)edt->tree,
- &fdata, stdout);
+ proto_tree_print(&print_args, edt, stdout);
if (!print_hex) {
/* "print_hex_data()" will put out a leading blank line, as well
as a trailing one; print one here, to separate the packets,
putchar('\n');
}
if (print_hex) {
- print_hex_data(stdout, print_args.format, &fdata);
+ print_hex_data(stdout, print_args.format, edt);
putchar('\n');
}
}
}
char *
-file_open_error_message(int err, gboolean for_writing)
+file_open_error_message(int err, gboolean for_writing, int file_type)
{
char *errmsg;
static char errmsg_errno[1024+1];
errmsg = "The file \"%s\" is not a capture file in a format Tethereal understands.";
break;
+ case WTAP_ERR_CANT_WRITE_TO_PIPE:
+ /* Seen only when opening a capture file for writing. */
+ snprintf(errmsg_errno, sizeof(errmsg_errno),
+ "The file \"%%s\" is a pipe, and %s capture files cannot be "
+ "written to a pipe.", wtap_file_type_string(file_type));
+ errmsg = errmsg_errno;
+ break;
+
case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
/* Seen only when opening a capture file for writing. */
errmsg = "Tethereal does not support writing capture files in that format.";
default:
snprintf(errmsg_errno, sizeof(errmsg_errno),
- "The file \"%%s\" could not be opened: %s.",
+ "The file \"%%s\" could not be %s: %s.",
+ for_writing ? "created" : "opened",
wtap_strerror(err));
errmsg = errmsg_errno;
break;
{
wtap *wth;
int err;
- int fd;
- struct stat cf_stat;
char err_msg[2048+1];
wth = wtap_open_offline(fname, &err, FALSE);
if (wth == NULL)
goto fail;
- /* Find the size of the file. */
- fd = wtap_fd(wth);
- if (fstat(fd, &cf_stat) < 0) {
- err = errno;
- wtap_close(wth);
- goto fail;
- }
-
/* The open succeeded. Fill in the information for this file. */
- /* Initialize the table of conversations. */
- epan_conversation_init();
-
- /* Initialize protocol-specific variables */
- init_all_protocols();
-
- /* Initialize the common data structures for fragment reassembly.
- Must be done *after* "init_all_protocols()", as "init_all_protocols()"
- may free up space for fragments, which it finds by using the
- data structures that "reassemble_init()" frees. */
- reassemble_init();
+ /* Initialize all data structures used for dissection. */
+ init_dissection();
cf->wth = wth;
- cf->filed = fd;
- cf->f_len = cf_stat.st_size;
+ cf->filed = -1; /* not used, but set it anyway */
+ cf->f_len = 0; /* not used, but set it anyway */
/* Set the file name because we need it to set the follow stream filter.
XXX - is that still true? We need it for other reasons, though,
cf->esec = 0;
cf->eusec = 0;
cf->snap = wtap_snapshot_length(cf->wth);
+ if (cf->snap == 0) {
+ /* Snapshot length not known. */
+ cf->has_snap = FALSE;
+ cf->snap = WTAP_MAX_PACKET_SIZE;
+ } else
+ cf->has_snap = TRUE;
cf->progbar_quantum = 0;
cf->progbar_nextstep = 0;
firstsec = 0, firstusec = 0;
prevsec = 0, prevusec = 0;
-
+
return (0);
fail:
- snprintf(err_msg, sizeof err_msg, file_open_error_message(err, FALSE), fname);
+ snprintf(err_msg, sizeof err_msg, file_open_error_message(err, FALSE, 0),
+ fname);
fprintf(stderr, "tethereal: %s\n", err_msg);
return (err);
}
+
+#ifdef HAVE_LIBPCAP
+#ifndef _WIN32
+/* 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)
+{
+ 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 *errmsg, int errmsgl)
+{
+ struct stat pipe_stat;
+ int fd;
+ guint32 magic;
+ int b;
+ unsigned int bytes_read;
+
+ /*
+ * XXX Tethereal 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);
+ 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 */
+ bytes_read = 0;
+ while (bytes_read < sizeof magic) {
+ 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) {
+ case PCAP_MAGIC:
+ /* Host that wrote it has our byte order, and was running
+ a program using either standard or ss990417 libpcap. */
+ ld->byte_swapped = FALSE;
+ ld->modified = FALSE;
+ break;
+ case PCAP_MODIFIED_MAGIC:
+ /* Host that wrote it has our byte order, but was running
+ a program using either ss990915 or ss991029 libpcap. */
+ ld->byte_swapped = FALSE;
+ ld->modified = TRUE;
+ break;
+ case PCAP_SWAPPED_MAGIC:
+ /* Host that wrote it has a byte order opposite to ours,
+ and was running a program using either standard or
+ ss990417 libpcap. */
+ ld->byte_swapped = TRUE;
+ ld->modified = FALSE;
+ break;
+ case PCAP_SWAPPED_MODIFIED_MAGIC:
+ /* Host that wrote it out has a byte order opposite to
+ ours, and was running a program using either ss990915
+ or ss991029 libpcap. */
+ ld->byte_swapped = TRUE;
+ ld->modified = TRUE;
+ break;
+ default:
+ /* Not a "libpcap" type we know about. */
+ snprintf(errmsg, errmsgl, "Unrecognized libpcap format");
+ goto error;
+ }
+
+ /* Read the rest of the header */
+ bytes_read = 0;
+ while (bytes_read < sizeof(struct pcap_hdr)) {
+ 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;
+ }
+
+ if (ld->byte_swapped) {
+ /* Byte-swap the header fields about which we care. */
+ hdr->version_major = BSWAP16(hdr->version_major);
+ hdr->version_minor = BSWAP16(hdr->version_minor);
+ hdr->snaplen = BSWAP32(hdr->snaplen);
+ hdr->network = BSWAP32(hdr->network);
+ }
+
+ if (hdr->version_major < 2) {
+ 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,
+ struct pcaprec_modified_hdr *rechdr, guchar *data,
+ char *errmsg, int errmsgl)
+{
+ 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) {
+ if (b == 0)
+ result = PD_PIPE_EOF;
+ else
+ result = PD_PIPE_ERR;
+ break;
+ }
+ 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) {
+ if (b == 0)
+ result = PD_PIPE_EOF;
+ else
+ result = PD_PIPE_ERR;
+ break;
+ }
+ 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->packet_count+1, rechdr->hdr.incl_len);
+ break;
+ }
+ 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;
+ }
+
+ ld->pipe_err = PIPERR;
+ /* Return here rather than inside the switch to prevent GCC warning */
+ return -1;
+}
+#endif /* _WIN32 */
+#endif /* HAVE_LIBPCAP */
git.samba.org / obnox / wireshark / wip.git / blobdiff