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authormidipix <writeonce@midipix.org>2016-06-29 16:18:43 -0400
committermidipix <writeonce@midipix.org>2016-06-29 19:16:37 -0400
commitfc8f1d0e51b7135ab336318557181df394455843 (patch)
treebc882c9077c6bd359a9e4af7748d8228087706ff /src/fs/ntapi_tt_mount.c
parentf7b99942f85f4c8c35058f1a8b1194cd4468bc6d (diff)
downloadntapi-fc8f1d0e51b7135ab336318557181df394455843.tar.bz2
ntapi-fc8f1d0e51b7135ab336318557181df394455843.tar.xz
__ntapi_tt_dev_mount_points_to_statfs: refactor, explicit string comparison.
Diffstat (limited to 'src/fs/ntapi_tt_mount.c')
-rw-r--r--src/fs/ntapi_tt_mount.c54
1 files changed, 34 insertions, 20 deletions
diff --git a/src/fs/ntapi_tt_mount.c b/src/fs/ntapi_tt_mount.c
index 6b6dce2..344f5c1 100644
--- a/src/fs/ntapi_tt_mount.c
+++ b/src/fs/ntapi_tt_mount.c
@@ -280,39 +280,53 @@ int32_t __stdcall __ntapi_tt_dev_mount_points_to_statfs(
__in nt_mount_points * mount_points,
__in_out nt_statfs * statfs)
{
- int32_t status;
- uint32_t hash;
- uint32_t i;
+ int32_t status;
+ uint32_t i;
nt_mount_mgr_mount_point * mount_point;
- char * symlink;
+ wchar16_t * symlink;
mount_point = mount_points->mount_points;
statfs->nt_drive_letter = 0;
for (i = 0; i < mount_points->number; i++, mount_point++) {
- symlink = (char *)mount_points + mount_point->symlink_name_offset;
-
- /* both prefixes of interest happen to be of the same length */
- hash = __ntapi->tt_buffer_crc32(
- 0, symlink, __DOS_DEVICES_PREFIX_LEN);
-
- if (hash == __DOS_DEVICES_PREFIX_HASH)
+ symlink = (wchar16_t *)mount_points;
+ symlink += mount_point->symlink_name_offset / sizeof(wchar16_t);
+
+ if (symlink[0] != '\\')
+ return NT_STATUS_UNEXPECTED_IO_ERROR;
+
+ if ((symlink[1] == 'D')
+ && (symlink[2] == 'o')
+ && (symlink[3] == 's')
+ && (symlink[4] == 'D')
+ && (symlink[5] == 'e')
+ && (symlink[6] == 'v')
+ && (symlink[7] == 'i')
+ && (symlink[8] == 'c')
+ && (symlink[9] == 'e')
+ && (symlink[10] == 's'))
statfs->nt_drive_letter = ((nt_dos_devices_name *)(symlink))->letter;
- else if (hash == __VOLUME_PATH_PREFIX_HASH) {
- status = __ntapi_tt_utf16_string_to_guid(
- (nt_guid_str_utf16 *)(symlink \
- + __VOLUME_PATH_PREFIX_LEN \
- - sizeof(wchar16_t)),
- &statfs->nt_volume_guid);
-
- if (status != NT_STATUS_SUCCESS)
+
+ else if ((symlink[1] == '?')
+ && (symlink[2] == '?')
+ && (symlink[3] == '\\')
+ && (symlink[4] == 'V')
+ && (symlink[5] == 'o')
+ && (symlink[6] == 'l')
+ && (symlink[7] == 'u')
+ && (symlink[8] == 'm')
+ && (symlink[9] == 'e')
+ && (symlink[10] == '{')) {
+ if ((status = __ntapi_tt_utf16_string_to_guid(
+ (nt_guid_str_utf16 *)&symlink[10],
+ &statfs->nt_volume_guid)))
return status;
}
}
- return 0;
+ return NT_STATUS_SUCCESS;
}