/* rawshark.c

*

* $Id$

*

* Wireshark - Network traffic analyzer

* By Gerald Combs <gerald@wireshark.org>

* Copyright 1998 Gerald Combs

*

* Rawshark - Raw field extractor by Gerald Combs <gerald@wireshark.org>

* and Loris Degioanni <loris.degioanni@cacetech.com>

* Based on TShark, by Gilbert Ramirez <gram@alumni.rice.edu> and Guy Harris

* <guy@alum.mit.edu>.

*

* 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.

*/

/*

* Rawshark does the following:

* - Opens a specified file or named pipe

* - Applies a specfied DLT or "decode as" encapsulation

* - Reads frames prepended with a libpcap packet header.

* - Prints a status line, followed by fields from a specified list.

*/

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <ctype.h>

#include <locale.h>

#include <limits.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include <errno.h>

#ifdef HAVE_FCNTL_H

#include <fcntl.h>

#endif

#include <signal.h>

#ifdef HAVE_SYS_STAT_H

# include <sys/stat.h>

#endif

#ifdef NEED_STRERROR_H

#include "strerror.h"

#endif

#ifdef NEED_GETOPT_H

#include "getopt.h"

#endif

#include <glib.h>

#include <epan/epan.h>

#include <epan/filesystem.h>

#include <wsutil/privileges.h>

#include <wsutil/file_util.h>

#include "globals.h"

#include <epan/packet.h>

#include "file.h"

#include "disabled_protos.h"

#include <epan/prefs.h>

#include <epan/column.h>

#include "print.h"

#include <epan/addr_resolv.h>

#include "util.h"

#include "clopts_common.h"

#include "cmdarg_err.h"

#include "version_info.h"

#include <epan/plugins.h>

#include "register.h"

#include "conditions.h"

#include "capture_stop_conditions.h"

#include "capture_ui_utils.h"

#include <epan/epan_dissect.h>

#include <epan/stat_cmd_args.h>

#include <epan/timestamp.h>

#include <wsutil/unicode-utils.h>

#include "epan/column-utils.h"

#include "epan/proto.h"

#include <epan/tap.h>

#include <wtap.h>

#include <libpcap.h>

#ifdef HAVE_LIBPCAP

#include <pcap.h>

#include <setjmp.h>

#include "capture-pcap-util.h"

#include "pcapio.h"

#ifdef _WIN32

#include "capture-wpcap.h"

#include "capture_errs.h"

#endif /* _WIN32 */

#endif /* HAVE_LIBPCAP */

#include "log.h"

/*

* 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 nstime_t first_ts;

static nstime_t prev_dis_ts;

static nstime_t prev_cap_ts;

static GString *comp_info_str, *runtime_info_str;

/*

* The way the packet decode is to be written.

*/

typedef enum {

WRITE_TEXT, /* summary or detail text */

WRITE_XML /* PDML or PSML */

/* Add CSV and the like here */

} output_action_e;

static gboolean line_buffered;

static guint32 cum_bytes = 0;

static print_format_e print_format = PR_FMT_TEXT;

/*

* Standard secondary message for unexpected errors.

*/

static const char please_report[] =

"Please report this to the Wireshark developers";

cf_status_t raw_cf_open(capture_file *cf, const char *fname);

static int load_cap_file(capture_file *cf);

static gboolean process_packet(capture_file *cf, gint64 offset,

const struct wtap_pkthdr *whdr, const guchar *pd);

static void show_print_file_io_error(int err);

static void open_failure_message(const char *filename, int err,

gboolean for_writing);

static void failure_message(const char *msg_format, va_list ap);

static void read_failure_message(const char *filename, int err);

static void write_failure_message(const char *filename, int err);

static void protocolinfo_init(char *field);

static gboolean parse_field_string_format(char *format);

typedef enum {

SF_NONE, /* No format (placeholder) */

SF_NAME, /* %D Field name / description */

SF_NUMVAL, /* %N Numeric value */

SF_STRVAL /* %S String value */

} string_fmt_e;

typedef struct string_fmt_s {

gchar *plain;

string_fmt_e format; /* Valid if plain is NULL */

} string_fmt_t;

capture_file cfile;

int n_rfilters;

int n_rfcodes;

dfilter_t *rfcodes[64];

int n_rfieldfilters;

dfilter_t *rfieldfcodes[64];

int fd;

int encap;

GPtrArray *string_fmts;

static void

print_usage(gboolean print_ver)

{

FILE *output;

if (print_ver) {

output = stdout;

fprintf(output,

"Rawshark " VERSION "%s\n"

"Dump and analyze network traffic.\n"

"See http://www.wireshark.org for more information.\n"

"\n"

"%s",

wireshark_svnversion, get_copyright_info());

} else {

output = stderr;

}

fprintf(output, "\n");

fprintf(output, "Usage: rawshark [options] ...\n");

fprintf(output, "\n");

fprintf(output, "Input file:\n");

fprintf(output, " -r <infile> set the pipe or file name to read from\n");

fprintf(output, "\n");

fprintf(output, "Processing:\n");

fprintf(output, " -R <read filter> packet filter in Wireshark display filter syntax\n");

fprintf(output, " -F <field> field to display\n");

fprintf(output, " -s skip PCAP header on input\n");

fprintf(output, " -n disable all name resolution (def: all enabled)\n");

fprintf(output, " -N <name resolve flags> enable specific name resolution(s): \"mntC\"\n");

fprintf(output, " -d <encap:dlt>|<proto:protoname>\n");

fprintf(output, " packet encapsulation or protocol\n");

/*fprintf(output, "\n");*/

fprintf(output, "Output:\n");

fprintf(output, " -S format string for fields (%%D - name, %%S - stringval, %%N numval)\n");

fprintf(output, " -t ad|a|r|d|dd|e output format of time stamps (def: r: rel. to first)\n");

fprintf(output, " -l flush output after each packet\n");

fprintf(output, "\n");

fprintf(output, "Miscellaneous:\n");

fprintf(output, " -h display this help and exit\n");

fprintf(output, " -v display version info and exit\n");

fprintf(output, " -o <name>:<value> ... override preference setting\n");

}

static void

log_func_ignore (const gchar *log_domain _U_, GLogLevelFlags log_level _U_,

const gchar *message _U_, gpointer user_data _U_)

{

}

/**

* Open a pipe for raw input. This is a stripped-down version of

* pcap_loop.c:cap_pipe_open_live().

* We check if "pipe_name" is "-" (stdin) or a FIFO, and open it.

* @param pipe_name The name of the pipe or FIFO.

* @return A POSIX file descriptor on success, or -1 on failure.

*/

static int

raw_pipe_open(const char *pipe_name)

{

#ifndef _WIN32

struct stat pipe_stat;

#else

char *pncopy, *pos;

DWORD err;

wchar_t *err_str;

HANDLE hPipe = NULL;

#endif

int rfd;

g_log(LOG_DOMAIN_CAPTURE_CHILD, G_LOG_LEVEL_DEBUG, "open_raw_pipe: %s", pipe_name);

/*

* XXX Rawshark blocks until we return

*/

if (strcmp(pipe_name, "-") == 0) {

rfd = 0; /* read from stdin */

#ifdef _WIN32

/*

* This is needed to set the stdin pipe into binary mode, otherwise

* CR/LF are mangled...

*/

_setmode(0, _O_BINARY);

#endif /* _WIN32 */

} else {

#ifndef _WIN32

if (ws_stat(pipe_name, &pipe_stat) < 0) {

fprintf(stderr, "rawshark: The pipe %s could not be checked: %s\n",

pipe_name, strerror(errno));

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.

*/

} else

{

fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",

pipe_name);

}

return -1;

}

rfd = ws_open(pipe_name, O_RDONLY | O_NONBLOCK, 0000 /* no creation so don't matter */);

if (rfd == -1) {

fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",

pipe_name, strerror(errno));

return -1;

}

#else /* _WIN32 */

#define PIPE_STR "\\pipe\\"

/* Under Windows, named pipes _must_ have the form

* "\\<server>\pipe\<pipe_name>". <server> may be "." for localhost.

*/

pncopy = g_strdup(pipe_name);

if (strstr(pncopy, "\\\\") == pncopy) {

pos = strchr(pncopy + 3, '\\');

if (pos && g_ascii_strncasecmp(pos, PIPE_STR, strlen(PIPE_STR)) != 0)

pos = NULL;

}

g_free(pncopy);

if (!pos) {

fprintf(stderr, "rawshark: \"%s\" is neither an interface nor a pipe\n",

pipe_name);

return -1;

}

/* Wait for the pipe to appear */

while (1) {

hPipe = CreateFile(utf_8to16(pipe_name), GENERIC_READ, 0, NULL,

OPEN_EXISTING, 0, NULL);

if (hPipe != INVALID_HANDLE_VALUE)

break;

err = GetLastError();

if (err != ERROR_PIPE_BUSY) {

FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,

NULL, err, 0, (LPTSTR) &err_str, 0, NULL);

fprintf(stderr, "rawshark: \"%s\" could not be opened: %s (error %d)\n",

pipe_name, utf_16to8(err_str), err);

LocalFree(err_str);

return -1;

}

if (!WaitNamedPipe(utf_8to16(pipe_name), 30 * 1000)) {

err = GetLastError();

FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,

NULL, err, 0, (LPTSTR) &err_str, 0, NULL);

fprintf(stderr, "rawshark: \"%s\" could not be waited for: %s (error %d)\n",

pipe_name, utf_16to8(err_str), err);

LocalFree(err_str);

return -1;

}

}

rfd = _open_osfhandle((long) hPipe, _O_RDONLY);

if (rfd == -1) {

fprintf(stderr, "rawshark: \"%s\" could not be opened: %s\n",

pipe_name, strerror(errno));

return -1;

}

#endif /* _WIN32 */

}

return rfd;

}

/**

* Parse a link-type argument of the form "encap:<pcap dlt>" or

* "proto:<proto name>". "Pcap dlt" must be a name conforming to

* pcap_datalink_name_to_val() or an integer. "Proto name" must be

* a protocol name, e.g. "http".

*/

static gboolean

set_link_type(const char *lt_arg) {

char *spec_ptr = strchr(lt_arg, ':');

char *p;

int dlt_val;

long val;

dissector_handle_t dhandle;

GString *pref_str;

if (!spec_ptr)

return FALSE;

spec_ptr++;

if (strncmp(lt_arg, "encap:", strlen("encap:")) == 0) {

dlt_val = linktype_name_to_val(spec_ptr);

if (dlt_val == -1) {

errno = 0;

val = strtol(spec_ptr, &p, 10);

if (p == spec_ptr || *p != '\0' || errno != 0 || val > INT_MAX) {

return FALSE;

}

dlt_val = (int)val;

}

encap = wtap_pcap_encap_to_wtap_encap(dlt_val);

if (encap == WTAP_ENCAP_UNKNOWN) {

return FALSE;

}

return TRUE;

} else if (strncmp(lt_arg, "proto:", strlen("proto:")) == 0) {

dhandle = find_dissector(spec_ptr);

if (dhandle) {

encap = WTAP_ENCAP_USER0;

pref_str = g_string_new("uat:user_dlts:");

/* This must match the format used in the user_dlts file */

g_string_append_printf(pref_str,

"\"User 0 (DLT=147)\",\"%s\",\"0\",\"\",\"0\",\"\"",

spec_ptr);

if (prefs_set_pref(pref_str->str) != PREFS_SET_OK) {

g_string_free(pref_str, TRUE);

return FALSE;

}

g_string_free(pref_str, TRUE);

return TRUE;

}

}

return FALSE;

}

int

main(int argc, char *argv[])

{

char *init_progfile_dir_error;

int opt, i;

extern char *optarg;

gboolean arg_error = FALSE;

#ifdef _WIN32

WSADATA wsaData;

#endif /* _WIN32 */

char *gpf_path, *pf_path;

char *gdp_path, *dp_path;

int gpf_open_errno, gpf_read_errno;

int pf_open_errno, pf_read_errno;

int gdp_open_errno, gdp_read_errno;

int dp_open_errno, dp_read_errno;

int err;

gchar *pipe_name = NULL;

gchar *rfilters[64];

e_prefs *prefs;

char badopt;

GLogLevelFlags log_flags;

GPtrArray *disp_fields = g_ptr_array_new();

guint fc;

gboolean skip_pcap_header = FALSE;

#define OPTSTRING_INIT "d:F:hlnN:o:r:R:sS:t:v"

static const char optstring[] = OPTSTRING_INIT;

/*

* Get credential information for later use.

*/

get_credential_info();

/*

* Clear the filters arrays

*/

memset(rfilters, 0, sizeof(rfilters));

memset(rfcodes, 0, sizeof(rfcodes));

n_rfilters = 0;

n_rfcodes = 0;

/*

* Initialize our string format

*/

string_fmts = g_ptr_array_new();

/*

* Attempt to get the pathname of the executable file.

*/

init_progfile_dir_error = init_progfile_dir(argv[0], main);

if (init_progfile_dir_error != NULL) {

fprintf(stderr, "rawshark: Can't get pathname of rawshark program: %s.\n",

init_progfile_dir_error);

}

/*

* Get credential information for later use.

*/

get_credential_info();

/* nothing more than the standard GLib handler, but without a warning */

log_flags =

G_LOG_LEVEL_WARNING |

G_LOG_LEVEL_MESSAGE |

G_LOG_LEVEL_INFO |

G_LOG_LEVEL_DEBUG;

g_log_set_handler(NULL,

log_flags,

log_func_ignore, NULL /* user_data */);

g_log_set_handler(LOG_DOMAIN_CAPTURE_CHILD,

log_flags,

log_func_ignore, NULL /* user_data */);

timestamp_set_type(TS_RELATIVE);

timestamp_set_precision(TS_PREC_AUTO);

/* Register all dissectors; we must do this before checking for the

"-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(register_all_protocols, register_all_protocol_handoffs, NULL, NULL,

failure_message, open_failure_message, read_failure_message,

write_failure_message);

/* Now register the preferences for any non-dissector modules.

We must do that before we read the preferences as well. */

prefs_register_modules();

/* Set the C-language locale to the native environment. */

setlocale(LC_ALL, "");

prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,

&pf_open_errno, &pf_read_errno, &pf_path);

if (gpf_path != NULL) {

if (gpf_open_errno != 0) {

cmdarg_err("Can't open global preferences file \"%s\": %s.",

pf_path, strerror(gpf_open_errno));

}

if (gpf_read_errno != 0) {

cmdarg_err("I/O error reading global preferences file \"%s\": %s.",

pf_path, strerror(gpf_read_errno));

}

}

if (pf_path != NULL) {

if (pf_open_errno != 0) {

cmdarg_err("Can't open your preferences file \"%s\": %s.", pf_path,

strerror(pf_open_errno));

}

if (pf_read_errno != 0) {

cmdarg_err("I/O error reading your preferences file \"%s\": %s.",

pf_path, strerror(pf_read_errno));

}

g_free(pf_path);

pf_path = NULL;

}

/* Set the name resolution code's flags from the preferences. */

g_resolv_flags = prefs->name_resolve;

/* Read the disabled protocols file. */

read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno,

&dp_path, &dp_open_errno, &dp_read_errno);

if (gdp_path != NULL) {

if (gdp_open_errno != 0) {

cmdarg_err("Could not open global disabled protocols file\n\"%s\": %s.",

gdp_path, strerror(gdp_open_errno));

}

if (gdp_read_errno != 0) {

cmdarg_err("I/O error reading global disabled protocols file\n\"%s\": %s.",

gdp_path, strerror(gdp_read_errno));

}

g_free(gdp_path);

}

if (dp_path != NULL) {

if (dp_open_errno != 0) {

cmdarg_err(

"Could not open your disabled protocols file\n\"%s\": %s.", dp_path,

strerror(dp_open_errno));

}

if (dp_read_errno != 0) {

cmdarg_err(

"I/O error reading your disabled protocols file\n\"%s\": %s.", dp_path,

strerror(dp_read_errno));

}

g_free(dp_path);

}

#ifdef _WIN32

/* Load Wpcap, if possible */

load_wpcap();

#endif

init_cap_file(&cfile);

/* Assemble the compile-time version information string */

comp_info_str = g_string_new("Compiled ");

get_compiled_version_info(comp_info_str, get_epan_compiled_version_info);

/* Assemble the run-time version information string */

runtime_info_str = g_string_new("Running ");

get_runtime_version_info(runtime_info_str, NULL);

/* Print format defaults to this. */

print_format = PR_FMT_TEXT;

/* Initialize our encapsulation type */

encap = WTAP_ENCAP_UNKNOWN;

/* Now get our args */

/* XXX - We should probably have an option to dump libpcap link types */

while ((opt = getopt(argc, argv, optstring)) != -1) {

switch (opt) {

case 'd': /* Payload type */

if (!set_link_type(optarg)) {

cmdarg_err("Invalid link type or protocol \"%s\"", optarg);

exit(1);

}

break;

case 'F': /* Read field to display */

g_ptr_array_add(disp_fields, g_strdup(optarg));

break;

case 'h': /* Print help and exit */

print_usage(TRUE);

exit(0);

break;

case 'l': /* "Line-buffer" standard output */

/* This isn't line-buffering, strictly speaking, it's just

flushing the standard output after the information for

each packet is printed; however, that should be good

enough for all the purposes to which "-l" is put (and

is probably actually better for "-V", as it does fewer

writes).

See the comment in "process_packet()" for an explanation of

why we do that, and why we don't just use "setvbuf()" to

make the standard output line-buffered (short version: in

Windows, "line-buffered" is the same as "fully-buffered",

and the output buffer is only flushed when it fills up). */

line_buffered = TRUE;

break;

case 'n': /* No name resolution */

g_resolv_flags = RESOLV_NONE;

break;

case 'N': /* Select what types of addresses/port #s to resolve */

if (g_resolv_flags == RESOLV_ALL)

g_resolv_flags = RESOLV_NONE;

badopt = string_to_name_resolve(optarg, &g_resolv_flags);

if (badopt != '\0') {

cmdarg_err("-N specifies unknown resolving option '%c'; valid options are 'm', 'n', and 't'",

badopt);

exit(1);

}

break;

case 'o': /* Override preference from command line */

switch (prefs_set_pref(optarg)) {

case PREFS_SET_OK:

break;

case PREFS_SET_SYNTAX_ERR:

cmdarg_err("Invalid -o flag \"%s\"", optarg);

exit(1);

break;

case PREFS_SET_NO_SUCH_PREF:

case PREFS_SET_OBSOLETE:

cmdarg_err("-o flag \"%s\" specifies unknown preference", optarg);

exit(1);

break;

}

break;

case 'r': /* Read capture file xxx */

pipe_name = g_strdup(optarg);

break;

case 'R': /* Read file filter */

if(n_rfilters < (int) sizeof(rfilters) / (int) sizeof(rfilters[0])) {

rfilters[n_rfilters++] = optarg;

}

else {

cmdarg_err("Too many display filters");

exit(1);

}

break;

case 's': /* Skip PCAP header */

skip_pcap_header = TRUE;

break;

case 'S': /* Print string representations */

if (!parse_field_string_format(optarg)) {

cmdarg_err("Invalid field string format");

exit(1);

}

break;

case 't': /* Time stamp type */

if (strcmp(optarg, "r") == 0)

timestamp_set_type(TS_RELATIVE);

else if (strcmp(optarg, "a") == 0)

timestamp_set_type(TS_ABSOLUTE);

else if (strcmp(optarg, "ad") == 0)

timestamp_set_type(TS_ABSOLUTE_WITH_DATE);

else if (strcmp(optarg, "d") == 0)

timestamp_set_type(TS_DELTA);

else if (strcmp(optarg, "dd") == 0)

timestamp_set_type(TS_DELTA_DIS);

else if (strcmp(optarg, "e") == 0)

timestamp_set_type(TS_EPOCH);

else {

cmdarg_err("Invalid time stamp type \"%s\"",

optarg);

cmdarg_err_cont("It must be \"r\" for relative, \"a\" for absolute,");

cmdarg_err_cont("\"ad\" for absolute with date, or \"d\" for delta.");

exit(1);

}

break;

case 'v': /* Show version and exit */

printf("Rawshark " VERSION "%s\n"

"\n"

"%s"

"\n"

"%s"

"\n"

"%s",

wireshark_svnversion, get_copyright_info(), comp_info_str->str,

runtime_info_str->str);

exit(0);

break;

default:

case '?': /* Bad flag - print usage message */

print_usage(TRUE);

exit(1);

break;

}

}

/* 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 their preferences have changed.

Initialize preferences before display filters, otherwise modules

like MATE won't work. */

prefs_apply_all();

/* Initialize our display fields */

for (fc = 0; fc < disp_fields->len; fc++) {

protocolinfo_init(g_ptr_array_index(disp_fields, fc));

}

g_ptr_array_free(disp_fields, TRUE);

printf("\n");

fflush(stdout);

/* 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"

flag was specified. */

if (optind < argc) {

if (pipe_name != NULL) {

if (n_rfilters != 0) {

cmdarg_err("Read filters were specified both with \"-R\" "

"and with additional command-line arguments");

exit(1);

}

rfilters[n_rfilters] = get_args_as_string(argc, argv, optind);

}

}

/* Make sure we got a dissector handle for our payload. */

if (encap == WTAP_ENCAP_UNKNOWN) {

cmdarg_err("No valid payload dissector specified.");

exit(1);

}

if (arg_error) {

print_usage(FALSE);

exit(1);

}

#ifdef _WIN32

/* Start windows sockets */

WSAStartup( MAKEWORD( 1, 1 ), &wsaData );

#endif /* _WIN32 */

/* At this point MATE will have registered its field array so we can

have a tap filter with one of MATE's late-registered fields as part

of the filter. We can now process all the "-z" arguments. */

start_requested_stats();

/* disabled protocols as per configuration file */

if (gdp_path == NULL && dp_path == NULL) {

set_disabled_protos_list();

}

/* 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.fmt_matx[i] = (gboolean *) g_malloc0(sizeof(gboolean) *

NUM_COL_FMTS);

get_column_format_matches(cfile.cinfo.fmt_matx[i], cfile.cinfo.col_fmt[i]);

cfile.cinfo.col_data[i] = NULL;

if (cfile.cinfo.col_fmt[i] == COL_INFO)

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.col_expr[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);

cfile.cinfo.col_expr.col_expr_val[i] = (gchar *) g_malloc(sizeof(gchar) * COL_MAX_LEN);

}

for (i = 0; i < cfile.cinfo.num_cols; i++) {

int j;

for (j = 0; j < NUM_COL_FMTS; j++) {

if (!cfile.cinfo.fmt_matx[i][j])

continue;

if (cfile.cinfo.col_first[j] == -1)

cfile.cinfo.col_first[j] = i;

cfile.cinfo.col_last[j] = i;

}

}

if (n_rfilters != 0) {

for (i = 0; i < n_rfilters; i++) {

if (!dfilter_compile(rfilters[i], &rfcodes[n_rfcodes])) {

cmdarg_err("%s", dfilter_error_msg);

epan_cleanup();

exit(2);

}

n_rfcodes++;

}

}

if (pipe_name) {

/*

* We're reading a pipe (or capture file).

*/

/*

* Immediately relinquish any special privileges we have; we must not

* be allowed to read any capture files the user running Rawshark

* can't open.

*/

relinquish_special_privs_perm();

if (raw_cf_open(&cfile, pipe_name) != CF_OK) {

epan_cleanup();

exit(2);

}

/* Do we need to PCAP header and magic? */

if (skip_pcap_header) {

guint bytes_left = sizeof(struct pcap_hdr) + sizeof(guint32);

gchar buf[sizeof(struct pcap_hdr) + sizeof(guint32)];

while (bytes_left > 0) {

guint bytes = read(fd, buf, bytes_left);

if (bytes <= 0) {

cmdarg_err("Not enough bytes for pcap header.");

exit(2);

}

bytes_left -= bytes;

}

}

/* Set timestamp precision; there should arguably be a command-line

option to let the user set this. */

#if 0

switch(wtap_file_tsprecision(cfile.wth)) {

case(WTAP_FILE_TSPREC_SEC):

timestamp_set_precision(TS_PREC_AUTO_SEC);

break;

case(WTAP_FILE_TSPREC_DSEC):

timestamp_set_precision(TS_PREC_AUTO_DSEC);

break;

case(WTAP_FILE_TSPREC_CSEC):

timestamp_set_precision(TS_PREC_AUTO_CSEC);

break;

case(WTAP_FILE_TSPREC_MSEC):

timestamp_set_precision(TS_PREC_AUTO_MSEC);

break;

case(WTAP_FILE_TSPREC_USEC):

timestamp_set_precision(TS_PREC_AUTO_USEC);

break;

case(WTAP_FILE_TSPREC_NSEC):

timestamp_set_precision(TS_PREC_AUTO_NSEC);

break;

default:

g_assert_not_reached();

}

#else

timestamp_set_precision(TS_PREC_AUTO_USEC);

#endif

/* Process the packets in the file */

err = load_cap_file(&cfile);

if (err != 0) {

epan_cleanup();

exit(2);

}

} else {

/* If you want to capture live packets, use TShark. */

cmdarg_err("Input file or pipe name not specified.");

exit(2);

}

epan_cleanup();

return 0;

}

/**

* Read data from a raw pipe. The "raw" data consists of a libpcap

* packet header followed by the payload.

* @param fd [IN] A POSIX file descriptor. Because that's _exactly_ the sort

* of thing you want to use in Windows.

* @param phdr [OUT] Packet header information.

* @param err [OUT] Error indicator. Uses wiretap values.

* @param err_info [OUT] Error message.

* @param data_offset [OUT] data offset in the pipe.

* @return TRUE on success, FALSE on failure.

*/

static gboolean

raw_pipe_read(struct wtap_pkthdr *phdr, guchar * pd, int *err, gchar **err_info, gint64 *data_offset) {

struct pcaprec_hdr hdr;

int bytes_read = 0;

int bytes_needed = sizeof(struct pcaprec_hdr);

guchar *ptr = (guchar*)&hdr;

static gchar err_str[100];

/* Copied from capture_loop.c */

while (bytes_needed > 0) {

bytes_read = read(fd, ptr, bytes_needed);

if (bytes_read == 0) {

*err = 0;

return FALSE;

} else if (bytes_read < 0) {

*err = WTAP_ERR_CANT_READ;

*err_info = "Error reading header from pipe";

return FALSE;

}

bytes_needed -= bytes_read;

*data_offset += bytes_read;

ptr += bytes_read;

}

bytes_read = 0;

phdr->ts.secs = hdr.ts_sec;

phdr->ts.nsecs = hdr.ts_usec * 1000;

phdr->caplen = bytes_needed = hdr.incl_len;

phdr->len = hdr.orig_len;

phdr->pkt_encap = encap;

#if 0

printf("tv_sec: %d (%04x)\n", hdr.ts.tv_sec, hdr.ts.tv_sec);

printf("tv_usec: %d (%04x)\n", hdr.ts.tv_usec, hdr.ts.tv_usec);

printf("caplen: %d (%04x)\n", hdr.caplen, hdr.caplen);

printf("len: %d (%04x)\n", hdr.len, hdr.len);

#endif

if (bytes_needed > WTAP_MAX_PACKET_SIZE) {

*err = WTAP_ERR_BAD_RECORD;

g_snprintf(err_str, 100, "Bad packet length: %d (%04x)", bytes_needed, bytes_needed);

*err_info = err_str;

return FALSE;

}

ptr = pd;

while (bytes_needed > 0) {

bytes_read = read(fd, ptr, bytes_needed);

if (bytes_read == 0) {

*err = WTAP_ERR_SHORT_READ;

*err_info = "Got zero bytes reading data from pipe";

return FALSE;

} else if (bytes_read < 0) {

*err = WTAP_ERR_CANT_READ;

*err_info = "Error reading data from pipe";

return FALSE;

}

bytes_needed -= bytes_read;

*data_offset += bytes_read;

ptr += bytes_read;

}

return TRUE;

}

static int

load_cap_file(capture_file *cf)

{

int err;

gchar *err_info;

gint64 data_offset = 0;

struct wtap_pkthdr phdr;

guchar pd[WTAP_MAX_PACKET_SIZE];

while (raw_pipe_read(&phdr, pd, &err, &err_info, &data_offset)) {

process_packet(cf, data_offset, &phdr, pd);

}

if (err != 0) {

/* Print a message noting that the read failed somewhere along the line. */

switch (err) {

case WTAP_ERR_UNSUPPORTED_ENCAP:

cmdarg_err("\"%s\" has a packet with a network type that Rawshark doesn't support.\n(%s)",

cf->filename, err_info);

break;

case WTAP_ERR_CANT_READ:

cmdarg_err("An attempt to read from \"%s\" failed for some unknown reason.",

cf->filename);

break;

case WTAP_ERR_SHORT_READ:

cmdarg_err("\"%s\" appears to have been cut short in the middle of a packet.",

cf->filename);

break;

case WTAP_ERR_BAD_RECORD:

cmdarg_err("\"%s\" appears to be damaged or corrupt.\n(%s)",

cf->filename, err_info);

break;

default:

cmdarg_err("An error occurred while reading \"%s\": %s.",