wpa_supplicant/win_if_list.c

   1 /*
   2  * win_if_list - Display network interfaces with description (for Windows)
   3  * Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  *
  14  * This small tool is for the Windows build to provide an easy way of fetching
  15  * a list of available network interfaces.
  16  */
  17
  18 #include "includes.h"
  19 #include <stdio.h>
  20 #ifdef CONFIG_USE_NDISUIO
  21 #include <winsock2.h>
  22 #include <ntddndis.h>
  23 #else /* CONFIG_USE_NDISUIO */
  24 #include "pcap.h"
  25 #include <winsock.h>
  26 #endif /* CONFIG_USE_NDISUIO */
  27
  28 #ifdef CONFIG_USE_NDISUIO
  29
  30 /* from nuiouser.h */
  31 #define FSCTL_NDISUIO_BASE      FILE_DEVICE_NETWORK
  32
  33 #define _NDISUIO_CTL_CODE(_Function, _Method, _Access) \
  34         CTL_CODE(FSCTL_NDISUIO_BASE, _Function, _Method, _Access)
  35
  36 #define IOCTL_NDISUIO_QUERY_BINDING \
  37         _NDISUIO_CTL_CODE(0x203, METHOD_BUFFERED, \
  38                           FILE_READ_ACCESS | FILE_WRITE_ACCESS)
  39
  40 #define IOCTL_NDISUIO_BIND_WAIT \
  41         _NDISUIO_CTL_CODE(0x204, METHOD_BUFFERED, \
  42                           FILE_READ_ACCESS | FILE_WRITE_ACCESS)
  43
  44 typedef struct _NDISUIO_QUERY_BINDING
  45 {
  46         ULONG BindingIndex;
  47         ULONG DeviceNameOffset;
  48         ULONG DeviceNameLength;
  49         ULONG DeviceDescrOffset;
  50         ULONG DeviceDescrLength;
  51 } NDISUIO_QUERY_BINDING, *PNDISUIO_QUERY_BINDING;
  52
  53
  54 static HANDLE ndisuio_open(void)
  55 {
  56         DWORD written;
  57         HANDLE h;
  58
  59         h = CreateFile(TEXT("\\\\.\\\\Ndisuio"),
  60                        GENERIC_READ | GENERIC_WRITE, 0, NULL,
  61                        OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
  62                        INVALID_HANDLE_VALUE);
  63         if (h == INVALID_HANDLE_VALUE)
  64                 return h;
  65
  66 #ifndef _WIN32_WCE
  67         if (!DeviceIoControl(h, IOCTL_NDISUIO_BIND_WAIT, NULL, 0, NULL, 0,
  68                              &written, NULL)) {
  69                 printf("IOCTL_NDISUIO_BIND_WAIT failed: %d",
  70                        (int) GetLastError());
  71                 CloseHandle(h);
  72                 return INVALID_HANDLE_VALUE;
  73         }
  74 #endif /* _WIN32_WCE */
  75
  76         return h;
  77 }
  78
  79
  80 static void ndisuio_query_bindings(HANDLE ndisuio)
  81 {
  82         NDISUIO_QUERY_BINDING *b;
  83         size_t blen = sizeof(*b) + 1024;
  84         int i, error;
  85         DWORD written;
  86         char name[256], desc[256];
  87         WCHAR *pos;
  88         size_t j, len;
  89
  90         b = malloc(blen);
  91         if (b == NULL)
  92                 return;
  93
  94         for (i = 0; ; i++) {
  95                 memset(b, 0, blen);
  96                 b->BindingIndex = i;
  97                 if (!DeviceIoControl(ndisuio, IOCTL_NDISUIO_QUERY_BINDING,
  98                                      b, sizeof(NDISUIO_QUERY_BINDING), b,
  99                                      (DWORD) blen, &written, NULL)) {
 100                         error = (int) GetLastError();
 101                         if (error == ERROR_NO_MORE_ITEMS)
 102                                 break;
 103                         printf("IOCTL_NDISUIO_QUERY_BINDING failed: %d",
 104                                error);
 105                         break;
 106                 }
 107
 108                 pos = (WCHAR *) ((char *) b + b->DeviceNameOffset);
 109                 len = b->DeviceNameLength;
 110                 if (len >= sizeof(name))
 111                         len = sizeof(name) - 1;
 112                 for (j = 0; j < len; j++)
 113                         name[j] = (char) pos[j];
 114                 name[len] = '\0';
 115
 116                 pos = (WCHAR *) ((char *) b + b->DeviceDescrOffset);
 117                 len = b->DeviceDescrLength;
 118                 if (len >= sizeof(desc))
 119                         len = sizeof(desc) - 1;
 120                 for (j = 0; j < len; j++)
 121                         desc[j] = (char) pos[j];
 122                 desc[len] = '\0';
 123
 124                 printf("ifname: %s\ndescription: %s\n\n", name, desc);
 125         }
 126
 127         free(b);
 128 }
 129
 130
 131 static void ndisuio_enum_bindings(void)
 132 {
 133         HANDLE ndisuio = ndisuio_open();
 134         if (ndisuio == INVALID_HANDLE_VALUE)
 135                 return;
 136
 137         ndisuio_query_bindings(ndisuio);
 138         CloseHandle(ndisuio);
 139 }
 140
 141 #else /* CONFIG_USE_NDISUIO */
 142
 143 static void show_dev(pcap_if_t *dev)
 144 {
 145         printf("ifname: %s\ndescription: %s\n\n",
 146                dev->name, dev->description);
 147 }
 148
 149
 150 static void pcap_enum_devs(void)
 151 {
 152         pcap_if_t *devs, *dev;
 153         char err[PCAP_ERRBUF_SIZE + 1];
 154
 155         if (pcap_findalldevs(&devs, err) < 0) {
 156                 fprintf(stderr, "Error - pcap_findalldevs: %s\n", err);
 157                 return;
 158         }
 159
 160         for (dev = devs; dev; dev = dev->next) {
 161                 show_dev(dev);
 162         }
 163
 164         pcap_freealldevs(devs);
 165 }
 166
 167 #endif /* CONFIG_USE_NDISUIO */
 168
 169
 170 int main(int argc, char *argv[])
 171 {
 172 #ifdef CONFIG_USE_NDISUIO
 173         ndisuio_enum_bindings();
 174 #else /* CONFIG_USE_NDISUIO */
 175         pcap_enum_devs();
 176 #endif /* CONFIG_USE_NDISUIO */
 177
 178         return 0;
 179 }