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Diffstat (limited to 'lib/libiscsiutil/utils.c')
| -rw-r--r-- | lib/libiscsiutil/utils.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/lib/libiscsiutil/utils.c b/lib/libiscsiutil/utils.c new file mode 100644 index 000000000000..ef2d67106da5 --- /dev/null +++ b/lib/libiscsiutil/utils.c @@ -0,0 +1,115 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2012 The FreeBSD Foundation + * + * This software was developed by Edward Tomasz Napierala under sponsorship + * from the FreeBSD Foundation. + * + * 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. + * + * 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. + */ + +#include <ctype.h> +#include <string.h> + +#include "libiscsiutil.h" + +#define MAX_NAME_LEN 223 + +char * +checked_strdup(const char *s) +{ + char *c; + + c = strdup(s); + if (c == NULL) + log_err(1, "strdup"); + return (c); +} + +bool +valid_iscsi_name(const char *name, void (*warn_fn)(const char *, ...)) +{ + int i; + + if (strlen(name) >= MAX_NAME_LEN) { + warn_fn("overlong name for target \"%s\"; max length allowed " + "by iSCSI specification is %d characters", + name, MAX_NAME_LEN); + return (false); + } + + /* + * In the cases below, we don't return an error, just in case the admin + * was right, and we're wrong. + */ + if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) { + for (i = strlen("iqn."); name[i] != '\0'; i++) { + /* + * XXX: We should verify UTF-8 normalisation, as defined + * by 3.2.6.2: iSCSI Name Encoding. + */ + if (isalnum(name[i])) + continue; + if (name[i] == '-' || name[i] == '.' || name[i] == ':') + continue; + warn_fn("invalid character \"%c\" in target name " + "\"%s\"; allowed characters are letters, digits, " + "'-', '.', and ':'", name[i], name); + break; + } + /* + * XXX: Check more stuff: valid date and a valid reversed domain. + */ + } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) { + if (strlen(name) != strlen("eui.") + 16) + warn_fn("invalid target name \"%s\"; the \"eui.\" " + "should be followed by exactly 16 hexadecimal " + "digits", name); + for (i = strlen("eui."); name[i] != '\0'; i++) { + if (!isxdigit(name[i])) { + warn_fn("invalid character \"%c\" in target " + "name \"%s\"; allowed characters are 1-9 " + "and A-F", name[i], name); + break; + } + } + } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) { + if (strlen(name) > strlen("naa.") + 32) + warn_fn("invalid target name \"%s\"; the \"naa.\" " + "should be followed by at most 32 hexadecimal " + "digits", name); + for (i = strlen("naa."); name[i] != '\0'; i++) { + if (!isxdigit(name[i])) { + warn_fn("invalid character \"%c\" in target " + "name \"%s\"; allowed characters are 1-9 " + "and A-F", name[i], name); + break; + } + } + } else { + warn_fn("invalid target name \"%s\"; should start with " + "either \"iqn.\", \"eui.\", or \"naa.\"", + name); + } + return (true); +} |