![Guy Harris](/assets/img/avatar_default.png)
compiled capture filter program, so remove it, and remove the include of <pcap.h> from "file.h"; instead, have local "struct bpf_program" structures where needed, and have those files that need stuff from <pcap.h> include it. This cleans stuff up a bit, and should eliminate a pile of compile warnings with Visual C++ due to <pcap.h> and some GTK+/GLib header file (or files they include) both defining "inline". svn path=/trunk/; revision=2954
794 lines
19 KiB
C
794 lines
19 KiB
C
/* util.c
|
|
* Utility routines
|
|
*
|
|
* $Id: util.c,v 1.49 2001/01/28 23:56:27 guy Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@zing.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
#include <sys/types.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
|
|
#ifdef NEED_SNPRINTF_H
|
|
# include "snprintf.h"
|
|
#endif
|
|
|
|
#ifndef WIN32
|
|
#include <pwd.h>
|
|
#endif
|
|
|
|
#ifdef NEED_MKSTEMP
|
|
#include "mkstemp.h"
|
|
#endif
|
|
|
|
#include "util.h"
|
|
|
|
#ifdef HAVE_IO_H
|
|
#include <io.h>
|
|
typedef int mode_t; /* for win32 */
|
|
#endif
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
|
|
#ifdef HAVE_SYS_SOCKET_H
|
|
#include <sys/socket.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_IOCTL_H
|
|
#include <sys/ioctl.h>
|
|
#endif
|
|
|
|
#include <pcap.h>
|
|
|
|
#ifndef WIN32
|
|
#include <net/if.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_SOCKIO_H
|
|
# include <sys/sockio.h>
|
|
#endif
|
|
|
|
#include "globals.h"
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Given a pathname, return:
|
|
*
|
|
* the errno, if an attempt to "stat()" the file fails;
|
|
*
|
|
* EISDIR, if the attempt succeeded and the file turned out
|
|
* to be a directory;
|
|
*
|
|
* 0, if the attempt succeeded and the file turned out not
|
|
* to be a directory.
|
|
*/
|
|
|
|
/*
|
|
* Visual C++ on Win32 systems doesn't define these. (Old UNIX systems don't
|
|
* define them either.)
|
|
*
|
|
* Visual C++ on Win32 systems doesn't define S_IFIFO, it defines _S_IFIFO.
|
|
*/
|
|
#ifndef S_ISREG
|
|
#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
|
|
#endif
|
|
#ifndef S_IFIFO
|
|
#define S_IFIFO _S_IFIFO
|
|
#endif
|
|
#ifndef S_ISFIFO
|
|
#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
|
|
#endif
|
|
#ifndef S_ISDIR
|
|
#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
|
|
#endif
|
|
|
|
int
|
|
test_for_directory(const char *path)
|
|
{
|
|
struct stat statb;
|
|
|
|
if (stat(path, &statb) < 0)
|
|
return errno;
|
|
|
|
if (S_ISDIR(statb.st_mode))
|
|
return EISDIR;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Given a pathname, return a pointer to the last pathname separator
|
|
* character in the pathname, or NULL if the pathname contains no
|
|
* separators.
|
|
*/
|
|
char *
|
|
find_last_pathname_separator(char *path)
|
|
{
|
|
char *separator;
|
|
|
|
#ifdef WIN32
|
|
char c;
|
|
|
|
/*
|
|
* We have to scan for '\' or '/'.
|
|
* Get to the end of the string.
|
|
*/
|
|
separator = path + strlen(path); /* points to ending '\0' */
|
|
while (separator > path) {
|
|
c = *--separator;
|
|
if (c == '\\' || c == '/')
|
|
return separator; /* found it */
|
|
}
|
|
|
|
/*
|
|
* OK, we didn't find any, so no directories - but there might
|
|
* be a drive letter....
|
|
*/
|
|
return strchr(path, ':');
|
|
#else
|
|
separator = strrchr(path, '/');
|
|
#endif
|
|
return separator;
|
|
}
|
|
|
|
/*
|
|
* Given a pathname, return the last component.
|
|
*/
|
|
char *
|
|
get_basename(char *path)
|
|
{
|
|
char *filename;
|
|
|
|
filename = find_last_pathname_separator(path);
|
|
if (filename == NULL) {
|
|
/*
|
|
* There're no directories, drive letters, etc. in the
|
|
* name; the pathname *is* the file name.
|
|
*/
|
|
filename = path;
|
|
} else {
|
|
/*
|
|
* Skip past the pathname or drive letter separator.
|
|
*/
|
|
filename++;
|
|
}
|
|
return filename;
|
|
}
|
|
|
|
/*
|
|
* Given a pathname, return a string containing everything but the
|
|
* last component. NOTE: this overwrites the pathname handed into
|
|
* it....
|
|
*/
|
|
char *
|
|
get_dirname(char *path)
|
|
{
|
|
char *separator;
|
|
|
|
separator = find_last_pathname_separator(path);
|
|
if (separator == NULL) {
|
|
/*
|
|
* There're no directories, drive letters, etc. in the
|
|
* name; there is no directory path to return.
|
|
*/
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Get rid of the last pathname separator and the final file
|
|
* name following it.
|
|
*/
|
|
*separator = '\0';
|
|
|
|
/*
|
|
* "path" now contains the pathname of the directory containing
|
|
* the file/directory to which it referred.
|
|
*/
|
|
return path;
|
|
}
|
|
|
|
/*
|
|
* Collect command-line arguments as a string consisting of the arguments,
|
|
* separated by spaces.
|
|
*/
|
|
char *
|
|
get_args_as_string(int argc, char **argv, int optind)
|
|
{
|
|
int len;
|
|
int i;
|
|
char *argstring;
|
|
|
|
/*
|
|
* Find out how long the string will be.
|
|
*/
|
|
len = 0;
|
|
for (i = optind; i < argc; i++) {
|
|
len += strlen(argv[i]);
|
|
len++; /* space, or '\0' if this is the last argument */
|
|
}
|
|
|
|
/*
|
|
* Allocate the buffer for the string.
|
|
*/
|
|
argstring = g_malloc(len);
|
|
|
|
/*
|
|
* Now construct the string.
|
|
*/
|
|
strcpy(argstring, "");
|
|
i = optind;
|
|
for (;;) {
|
|
strcat(argstring, argv[i]);
|
|
i++;
|
|
if (i == argc)
|
|
break;
|
|
strcat(argstring, " ");
|
|
}
|
|
return argstring;
|
|
}
|
|
|
|
static char *
|
|
setup_tmpdir(char *dir)
|
|
{
|
|
int len = strlen(dir);
|
|
char *newdir;
|
|
|
|
/* Append slash if necessary */
|
|
if (dir[len - 1] == '/') {
|
|
newdir = dir;
|
|
}
|
|
else {
|
|
newdir = g_malloc(len + 2);
|
|
strcpy(newdir, dir);
|
|
strcat(newdir, "/");
|
|
}
|
|
return newdir;
|
|
}
|
|
|
|
static int
|
|
try_tempfile(char *namebuf, int namebuflen, const char *dir, const char *pfx)
|
|
{
|
|
static const char suffix[] = "XXXXXXXXXX";
|
|
int namelen = strlen(dir) + strlen(pfx) + sizeof suffix;
|
|
mode_t old_umask;
|
|
int tmp_fd;
|
|
|
|
if (namebuflen < namelen) {
|
|
/* Stick in a truncated name, so that if this error is
|
|
reported with the file name, you at least get
|
|
something. */
|
|
snprintf(namebuf, namebuflen, "%s%s%s", dir, pfx, suffix);
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
strcpy(namebuf, dir);
|
|
strcat(namebuf, pfx);
|
|
strcat(namebuf, suffix);
|
|
|
|
/* The Single UNIX Specification doesn't say that "mkstemp()"
|
|
creates the temporary file with mode rw-------, so we
|
|
won't assume that all UNIXes will do so; instead, we set
|
|
the umask to 0077 to take away all group and other
|
|
permissions, attempt to create the file, and then put
|
|
the umask back. */
|
|
old_umask = umask(0077);
|
|
tmp_fd = mkstemp(namebuf);
|
|
umask(old_umask);
|
|
return tmp_fd;
|
|
}
|
|
|
|
static char *tmpdir = NULL;
|
|
#ifdef WIN32
|
|
static char *temp = NULL;
|
|
#endif
|
|
static char *E_tmpdir;
|
|
|
|
#ifndef P_tmpdir
|
|
#define P_tmpdir "/var/tmp"
|
|
#endif
|
|
|
|
int
|
|
create_tempfile(char *namebuf, int namebuflen, const char *pfx)
|
|
{
|
|
char *dir;
|
|
int fd;
|
|
static gboolean initialized;
|
|
|
|
if (!initialized) {
|
|
if ((dir = getenv("TMPDIR")) != NULL)
|
|
tmpdir = setup_tmpdir(dir);
|
|
#ifdef WIN32
|
|
if ((dir = getenv("TEMP")) != NULL)
|
|
temp = setup_tmpdir(dir);
|
|
#endif
|
|
|
|
E_tmpdir = setup_tmpdir(P_tmpdir);
|
|
initialized = TRUE;
|
|
}
|
|
|
|
if (tmpdir != NULL) {
|
|
fd = try_tempfile(namebuf, namebuflen, tmpdir, pfx);
|
|
if (fd != -1)
|
|
return fd;
|
|
}
|
|
|
|
#ifdef WIN32
|
|
if (temp != NULL) {
|
|
fd = try_tempfile(namebuf, namebuflen, temp, pfx);
|
|
if (fd != -1)
|
|
return fd;
|
|
}
|
|
#endif
|
|
|
|
fd = try_tempfile(namebuf, namebuflen, E_tmpdir, pfx);
|
|
if (fd != -1)
|
|
return fd;
|
|
|
|
return try_tempfile(namebuf, namebuflen, "/tmp", pfx);
|
|
}
|
|
|
|
/* ASCII/EBCDIC conversion tables from
|
|
* http://www.room42.com/store/computer_center/code_tables.shtml
|
|
*/
|
|
static guint8 ASCII_translate_EBCDIC [ 256 ] = {
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
|
|
0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
|
|
0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
|
|
0x40, 0x5A, 0x7F, 0x7B, 0x5B, 0x6C, 0x50, 0x7D, 0x4D,
|
|
0x5D, 0x5C, 0x4E, 0x6B, 0x60, 0x4B, 0x61,
|
|
0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8,
|
|
0xF9, 0x7A, 0x5E, 0x4C, 0x7E, 0x6E, 0x6F,
|
|
0x7C, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8,
|
|
0xC9, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6,
|
|
0xD7, 0xD8, 0xD9, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
|
|
0xE8, 0xE9, 0xAD, 0xE0, 0xBD, 0x5F, 0x6D,
|
|
0x7D, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
|
|
0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,
|
|
0x97, 0x98, 0x99, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
|
|
0xA8, 0xA9, 0xC0, 0x6A, 0xD0, 0xA1, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B,
|
|
0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B, 0x4B
|
|
};
|
|
|
|
void
|
|
ASCII_to_EBCDIC(guint8 *buf, guint bytes)
|
|
{
|
|
guint i;
|
|
guint8 *bufptr;
|
|
|
|
bufptr = buf;
|
|
|
|
for (i = 0; i < bytes; i++, bufptr++) {
|
|
*bufptr = ASCII_translate_EBCDIC[*bufptr];
|
|
}
|
|
}
|
|
|
|
guint8
|
|
ASCII_to_EBCDIC1(guint8 c)
|
|
{
|
|
return ASCII_translate_EBCDIC[c];
|
|
}
|
|
|
|
static guint8 EBCDIC_translate_ASCII [ 256 ] = {
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
|
|
0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
|
|
0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
|
|
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
|
|
0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
|
|
0x2E, 0x2E, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
|
|
0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x2E, 0x3F,
|
|
0x20, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x2E, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
|
|
0x26, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0x5E,
|
|
0x2D, 0x2F, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x7C, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
|
|
0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
|
|
0x2E, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
|
|
0x69, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71,
|
|
0x72, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x7A, 0x2E, 0x2E, 0x2E, 0x5B, 0x2E, 0x2E,
|
|
0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x2E, 0x2E, 0x2E, 0x2E, 0x5D, 0x2E, 0x2E,
|
|
0x7B, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
|
|
0x49, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x7D, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51,
|
|
0x52, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x5C, 0x2E, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
|
0x5A, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E,
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38,
|
|
0x39, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E, 0x2E
|
|
};
|
|
|
|
void
|
|
EBCDIC_to_ASCII(guint8 *buf, guint bytes)
|
|
{
|
|
guint i;
|
|
guint8 *bufptr;
|
|
|
|
bufptr = buf;
|
|
|
|
for (i = 0; i < bytes; i++, bufptr++) {
|
|
*bufptr = EBCDIC_translate_ASCII[*bufptr];
|
|
}
|
|
}
|
|
|
|
guint8
|
|
EBCDIC_to_ASCII1(guint8 c)
|
|
{
|
|
return EBCDIC_translate_ASCII[c];
|
|
}
|
|
|
|
#ifdef HAVE_LIBPCAP
|
|
|
|
/*
|
|
* If the ability to capture packets is added to Wiretap, these
|
|
* routines should be moved to the Wiretap source (with
|
|
* "get_interface_list()" and "free_interface_list()" renamed to
|
|
* "wtap_get_interface_list()" and "wtap_free_interface_list()",
|
|
* and modified to use Wiretap routines to attempt to open the
|
|
* interface.
|
|
*/
|
|
|
|
struct search_user_data {
|
|
char *name;
|
|
int found;
|
|
};
|
|
|
|
static void
|
|
search_for_if_cb(gpointer data, gpointer user_data);
|
|
|
|
static void
|
|
free_if_cb(gpointer data, gpointer user_data);
|
|
|
|
#ifndef WIN32
|
|
GList *
|
|
get_interface_list(int *err, char *err_str)
|
|
{
|
|
GList *il = NULL;
|
|
gint nonloopback_pos = 0;
|
|
struct ifreq *ifr, *last;
|
|
struct ifconf ifc;
|
|
struct ifreq ifrflags;
|
|
int sock = socket(AF_INET, SOCK_DGRAM, 0);
|
|
struct search_user_data user_data;
|
|
pcap_t *pch;
|
|
int len, lastlen;
|
|
char *buf;
|
|
|
|
if (sock < 0) {
|
|
sprintf(err_str, "Error opening socket: %s",
|
|
strerror(errno));
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* This code came from: W. Richard Stevens: "UNIX Network Programming",
|
|
* Networking APIs: Sockets and XTI, Vol 1, page 434.
|
|
*/
|
|
lastlen = 0;
|
|
len = 100 * sizeof(struct ifreq);
|
|
for ( ; ; ) {
|
|
buf = g_malloc(len);
|
|
ifc.ifc_len = len;
|
|
ifc.ifc_buf = buf;
|
|
memset (buf, 0, len);
|
|
if (ioctl(sock, SIOCGIFCONF, &ifc) < 0) {
|
|
if (errno != EINVAL || lastlen != 0) {
|
|
sprintf(err_str,
|
|
"SIOCGIFCONF ioctl error getting list of interfaces: %s",
|
|
strerror(errno));
|
|
goto fail;
|
|
}
|
|
} else {
|
|
if (ifc.ifc_len < sizeof(struct ifreq)) {
|
|
sprintf(err_str,
|
|
"SIOCGIFCONF ioctl gave too small return buffer");
|
|
goto fail;
|
|
}
|
|
if (ifc.ifc_len == lastlen)
|
|
break; /* success, len has not changed */
|
|
lastlen = ifc.ifc_len;
|
|
}
|
|
len += 10 * sizeof(struct ifreq); /* increment */
|
|
g_free(buf);
|
|
}
|
|
ifr = (struct ifreq *) ifc.ifc_req;
|
|
last = (struct ifreq *) ((char *) ifr + ifc.ifc_len);
|
|
while (ifr < last) {
|
|
/*
|
|
* Skip addresses that begin with "dummy", or that include
|
|
* a ":" (the latter are Solaris virtuals).
|
|
*/
|
|
if (strncmp(ifr->ifr_name, "dummy", 5) == 0 ||
|
|
strchr(ifr->ifr_name, ':') != NULL)
|
|
goto next;
|
|
|
|
/*
|
|
* If we already have this interface name on the list,
|
|
* don't add it (SIOCGIFCONF returns, at least on
|
|
* BSD-flavored systems, one entry per interface *address*;
|
|
* if an interface has multiple addresses, we get multiple
|
|
* entries for it).
|
|
*/
|
|
user_data.name = ifr->ifr_name;
|
|
user_data.found = FALSE;
|
|
g_list_foreach(il, search_for_if_cb, &user_data);
|
|
if (user_data.found)
|
|
goto next;
|
|
|
|
/*
|
|
* Get the interface flags.
|
|
*/
|
|
memset(&ifrflags, 0, sizeof ifrflags);
|
|
strncpy(ifrflags.ifr_name, ifr->ifr_name,
|
|
sizeof ifrflags.ifr_name);
|
|
if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifrflags) < 0) {
|
|
if (errno == ENXIO)
|
|
goto next;
|
|
sprintf(err_str, "SIOCGIFFLAGS error getting flags for interface %s: %s",
|
|
ifr->ifr_name, strerror(errno));
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* Skip interfaces that aren't up.
|
|
*/
|
|
if (!(ifrflags.ifr_flags & IFF_UP))
|
|
goto next;
|
|
|
|
/*
|
|
* Skip interfaces that we can't open with "libpcap".
|
|
* Open with the minimum packet size - it appears that the
|
|
* IRIX SIOCSNOOPLEN "ioctl" may fail if the capture length
|
|
* supplied is too large, rather than just truncating it.
|
|
*/
|
|
pch = pcap_open_live(ifr->ifr_name, MIN_PACKET_SIZE, 0, 0,
|
|
err_str);
|
|
if (pch == NULL)
|
|
goto next;
|
|
pcap_close(pch);
|
|
|
|
/*
|
|
* If it's a loopback interface, add it at the end of the
|
|
* list, otherwise add it after the last non-loopback
|
|
* interface, so all loopback interfaces go at the end - we
|
|
* don't want a loopback interface to be the default capture
|
|
* device unless there are no non-loopback devices.
|
|
*/
|
|
if ((ifrflags.ifr_flags & IFF_LOOPBACK) ||
|
|
strncmp(ifr->ifr_name, "lo", 2) == 0)
|
|
il = g_list_insert(il, g_strdup(ifr->ifr_name), -1);
|
|
else {
|
|
il = g_list_insert(il, g_strdup(ifr->ifr_name),
|
|
nonloopback_pos);
|
|
/*
|
|
* Insert the next non-loopback interface after this
|
|
* one.
|
|
*/
|
|
nonloopback_pos++;
|
|
}
|
|
|
|
next:
|
|
#ifdef HAVE_SA_LEN
|
|
ifr = (struct ifreq *) ((char *) ifr + ifr->ifr_addr.sa_len + IFNAMSIZ);
|
|
#else
|
|
ifr = (struct ifreq *) ((char *) ifr + sizeof(struct ifreq));
|
|
#endif
|
|
}
|
|
|
|
#ifdef linux
|
|
/*
|
|
* OK, maybe we have support for the "any" device, to do a cooked
|
|
* capture on all interfaces at once.
|
|
* Try opening it and, if that succeeds, add it to the end of
|
|
* the list of interfaces.
|
|
*/
|
|
pch = pcap_open_live("any", MIN_PACKET_SIZE, 0, 0, err_str);
|
|
if (pch != NULL) {
|
|
/*
|
|
* It worked; we can use the "any" device.
|
|
*/
|
|
il = g_list_insert(il, g_strdup("any"), -1);
|
|
pcap_close(pch);
|
|
}
|
|
#endif
|
|
|
|
g_free(ifc.ifc_buf);
|
|
close(sock);
|
|
|
|
if (il == NULL) {
|
|
/*
|
|
* No interfaces found.
|
|
*/
|
|
*err = NO_INTERFACES_FOUND;
|
|
}
|
|
return il;
|
|
|
|
fail:
|
|
if (il != NULL) {
|
|
g_list_foreach(il, free_if_cb, NULL);
|
|
g_list_free(il);
|
|
}
|
|
g_free(ifc.ifc_buf);
|
|
close(sock);
|
|
*err = CANT_GET_INTERFACE_LIST;
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
search_for_if_cb(gpointer data, gpointer user_data)
|
|
{
|
|
struct search_user_data *search_user_data = user_data;
|
|
|
|
if (strcmp((char *)data, search_user_data->name) == 0)
|
|
search_user_data->found = TRUE;
|
|
}
|
|
#else
|
|
GList *
|
|
get_interface_list(int *err, char *err_str) {
|
|
GList *il = NULL;
|
|
wchar_t *names;
|
|
char *win95names;
|
|
char newname[255];
|
|
int i, j, done;
|
|
|
|
names = (wchar_t *)pcap_lookupdev(err_str);
|
|
i = done = 0;
|
|
|
|
if (names) {
|
|
if (names[0]<256) {
|
|
/* If names[0] is less than 256 it means the first byte is 0
|
|
This implies that we are using unicode characters */
|
|
do
|
|
{
|
|
j = 0;
|
|
while (names[i] != 0)
|
|
newname[j++] = names[i++];
|
|
i++;
|
|
if (names[i] == 0)
|
|
done = 1;
|
|
newname[j++] = 0;
|
|
il = g_list_append(il, g_strdup(newname));
|
|
} while (!done);
|
|
}
|
|
else {
|
|
/* Otherwise we are in Windows 95/98 and using ascii(8 bit)
|
|
characters */
|
|
do
|
|
{
|
|
win95names=names;
|
|
j = 0;
|
|
while (win95names[i] != 0)
|
|
newname[j++] = win95names[i++];
|
|
i++;
|
|
if (win95names[i] == 0)
|
|
done = 1;
|
|
newname[j++] = 0;
|
|
il = g_list_append(il, g_strdup(newname));
|
|
} while (!done);
|
|
}
|
|
}
|
|
return(il);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
free_if_cb(gpointer data, gpointer user_data)
|
|
{
|
|
g_free(data);
|
|
}
|
|
|
|
void
|
|
free_interface_list(GList *if_list)
|
|
{
|
|
while (if_list != NULL) {
|
|
g_free(if_list->data);
|
|
if_list = g_list_remove_link(if_list, if_list);
|
|
}
|
|
}
|
|
|
|
#endif /* HAVE_LIBPCAP */
|
|
|
|
|
|
/* Compute the difference between two seconds/microseconds time stamps. */
|
|
void
|
|
compute_timestamp_diff(gint *diffsec, gint *diffusec,
|
|
guint32 sec1, guint32 usec1, guint32 sec2, guint32 usec2)
|
|
{
|
|
if (sec1 == sec2) {
|
|
/* The seconds part of the first time is the same as the seconds
|
|
part of the second time, so if the microseconds part of the first
|
|
time is less than the microseconds part of the second time, the
|
|
first time is before the second time. The microseconds part of
|
|
the delta should just be the difference between the microseconds
|
|
part of the first time and the microseconds part of the second
|
|
time; don't adjust the seconds part of the delta, as it's OK if
|
|
the microseconds part is negative. */
|
|
|
|
*diffsec = sec1 - sec2;
|
|
*diffusec = usec1 - usec2;
|
|
} else if (sec1 <= sec2) {
|
|
/* The seconds part of the first time is less than the seconds part
|
|
of the second time, so the first time is before the second time.
|
|
|
|
Both the "seconds" and "microseconds" value of the delta
|
|
should have the same sign, so if the difference between the
|
|
microseconds values would be *positive*, subtract 1,000,000
|
|
from it, and add one to the seconds value. */
|
|
*diffsec = sec1 - sec2;
|
|
if (usec2 >= usec1) {
|
|
*diffusec = usec1 - usec2;
|
|
} else {
|
|
*diffusec = (usec1 - 1000000) - usec2;
|
|
(*diffsec)++;
|
|
}
|
|
} else {
|
|
/* Oh, good, we're not caught in a chronosynclastic infindibulum. */
|
|
*diffsec = sec1 - sec2;
|
|
if (usec2 <= usec1) {
|
|
*diffusec = usec1 - usec2;
|
|
} else {
|
|
*diffusec = (usec1 + 1000000) - usec2;
|
|
(*diffsec)--;
|
|
}
|
|
}
|
|
}
|