freebsd-skq/usr.sbin/iscsid/keys.c
trasz 39c661e770 Empty data segment during Login Phase is rather unlikely, but it's not
a protocol error.

Sponsored by:	The FreeBSD Foundation
2014-02-11 10:45:20 +00:00

218 lines
5.0 KiB
C

/*-
* Copyright (c) 2012 The FreeBSD Foundation
* All rights reserved.
*
* 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.
*
* $FreeBSD$
*/
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "iscsid.h"
struct keys *
keys_new(void)
{
struct keys *keys;
keys = calloc(sizeof(*keys), 1);
if (keys == NULL)
log_err(1, "calloc");
return (keys);
}
void
keys_delete(struct keys *keys)
{
free(keys->keys_data);
free(keys);
}
void
keys_load(struct keys *keys, const struct pdu *pdu)
{
int i;
char *pair;
size_t pair_len;
if (pdu->pdu_data_len == 0)
return;
if (pdu->pdu_data[pdu->pdu_data_len - 1] != '\0')
log_errx(1, "protocol error: key not NULL-terminated\n");
assert(keys->keys_data == NULL);
keys->keys_data_len = pdu->pdu_data_len;
keys->keys_data = malloc(keys->keys_data_len);
if (keys->keys_data == NULL)
log_err(1, "malloc");
memcpy(keys->keys_data, pdu->pdu_data, keys->keys_data_len);
/*
* XXX: Review this carefully.
*/
pair = keys->keys_data;
for (i = 0;; i++) {
if (i >= KEYS_MAX)
log_errx(1, "too many keys received");
pair_len = strlen(pair);
keys->keys_values[i] = pair;
keys->keys_names[i] = strsep(&keys->keys_values[i], "=");
if (keys->keys_names[i] == NULL || keys->keys_values[i] == NULL)
log_errx(1, "malformed keys");
log_debugx("key received: \"%s=%s\"",
keys->keys_names[i], keys->keys_values[i]);
pair += pair_len + 1; /* +1 to skip the terminating '\0'. */
if (pair == keys->keys_data + keys->keys_data_len)
break;
assert(pair < keys->keys_data + keys->keys_data_len);
}
}
void
keys_save(struct keys *keys, struct pdu *pdu)
{
char *data;
size_t len;
int i;
/*
* XXX: Not particularly efficient.
*/
len = 0;
for (i = 0; i < KEYS_MAX; i++) {
if (keys->keys_names[i] == NULL)
break;
/*
* +1 for '=', +1 for '\0'.
*/
len += strlen(keys->keys_names[i]) +
strlen(keys->keys_values[i]) + 2;
}
if (len == 0)
return;
data = malloc(len);
if (data == NULL)
log_err(1, "malloc");
pdu->pdu_data = data;
pdu->pdu_data_len = len;
for (i = 0; i < KEYS_MAX; i++) {
if (keys->keys_names[i] == NULL)
break;
data += sprintf(data, "%s=%s",
keys->keys_names[i], keys->keys_values[i]);
data += 1; /* for '\0'. */
}
}
const char *
keys_find(struct keys *keys, const char *name)
{
int i;
/*
* Note that we don't handle duplicated key names here,
* as they are not supposed to happen in requests, and if they do,
* it's an initiator error.
*/
for (i = 0; i < KEYS_MAX; i++) {
if (keys->keys_names[i] == NULL)
return (NULL);
if (strcmp(keys->keys_names[i], name) == 0)
return (keys->keys_values[i]);
}
return (NULL);
}
int
keys_find_int(struct keys *keys, const char *name)
{
const char *str;
char *endptr;
int num;
str = keys_find(keys, name);
if (str == NULL)
return (-1);
num = strtoul(str, &endptr, 10);
if (*endptr != '\0') {
log_debugx("invalid numeric value \"%s\"", str);
return (-1);
}
return (num);
}
void
keys_add(struct keys *keys, const char *name, const char *value)
{
int i;
log_debugx("key to send: \"%s=%s\"", name, value);
/*
* Note that we don't check for duplicates here, as they are perfectly
* fine in responses, e.g. the "TargetName" keys in discovery sesion
* response.
*/
for (i = 0; i < KEYS_MAX; i++) {
if (keys->keys_names[i] == NULL) {
keys->keys_names[i] = checked_strdup(name);
keys->keys_values[i] = checked_strdup(value);
return;
}
}
log_errx(1, "too many keys");
}
void
keys_add_int(struct keys *keys, const char *name, int value)
{
char *str;
int ret;
ret = asprintf(&str, "%d", value);
if (ret <= 0)
log_err(1, "asprintf");
keys_add(keys, name, str);
free(str);
}