diff options
| -rw-r--r-- | sys/conf/files | 1 | ||||
| -rw-r--r-- | sys/libkern/strvalid.c | 55 | ||||
| -rw-r--r-- | sys/sys/libkern.h | 1 |
3 files changed, 57 insertions, 0 deletions
diff --git a/sys/conf/files b/sys/conf/files index c662a06..d96f2d6 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -906,6 +906,7 @@ libkern/strtol.c standard libkern/strtoq.c standard libkern/strtoul.c standard libkern/strtouq.c standard +libkern/strvalid.c standard net/bpf.c standard net/bpf_filter.c optional bpf bpf.h standard \ diff --git a/sys/libkern/strvalid.c b/sys/libkern/strvalid.c new file mode 100644 index 0000000..df1b071 --- /dev/null +++ b/sys/libkern/strvalid.c @@ -0,0 +1,55 @@ +/*- + * Copyright (c) 2002 Networks Associates Technologies, Inc. + * All rights reserved. + * + * This software was developed for the FreeBSD Project by NAI Labs, + * the Security Research Division of Network Associates, Inc. under + * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA + * CHATS research program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The names of the authors may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/types.h> +#include <sys/libkern.h> + +/* + * Return (1) if the buffer pointed to by kernel pointer 'buffer' and + * of length 'bufferlen' contains a valid NUL-terminated string + */ +int +strvalid(const char *buffer, size_t bufferlen) +{ + int i; + + /* Must be NUL-terminated. */ + for (i = 0; i < bufferlen; i++) + if (buffer[i] == '\0') + return (1); + + return (0); +} diff --git a/sys/sys/libkern.h b/sys/sys/libkern.h index ccaf7e7..5049d3e 100644 --- a/sys/sys/libkern.h +++ b/sys/sys/libkern.h @@ -89,6 +89,7 @@ char *strcpy __P((char *, const char *)); size_t strlen __P((const char *)); int strncmp __P((const char *, const char *, size_t)); char *strncpy __P((char *, const char *, size_t)); +int strvalid __P((const char *, size_t)); static __inline int |
