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/*-
* Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
* All rights reserved.
*
* 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.
*
*/
/*
| $Id: pdu.c,v 2.2 2006/12/01 09:11:56 danny Exp danny $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdarg.h>
#include <camlib.h>
#include <dev/iscsi_initiator/iscsi.h>
#include "iscontrol.h"
static void pukeText(char *it, pdu_t *pp);
int
xmitpdu(isess_t *sess, pdu_t *pp)
{
if(ioctl(sess->fd, ISCSISEND, pp)) {
perror("xmitpdu");
return -1;
}
if(vflag)
pukeText("I-", pp);
return 0;
}
int
recvpdu(isess_t *sess, pdu_t *pp)
{
if(ioctl(sess->fd, ISCSIRECV, pp)) {
perror("recvpdu");
return -1;
}
// XXX: return error if truncated via
// the FUDGE factor.
if(vflag)
pukeText("T-", pp);
return 0;
}
int
sendPDU(isess_t *sess, pdu_t *pp, handler_t *hdlr)
{
if(xmitpdu(sess, pp))
return 0;
if(hdlr) {
int res;
pp->ahs_size = 8 * 1024;
if((pp->ahs_addr = malloc(pp->ahs_size)) == NULL) {
fprintf(stderr, "out of mem!");
return -1;
}
pp->ds_size = 0;
if((res = recvpdu(sess, pp)) != 0) {
fprintf(stderr, "recvpdu failed\n");
return res;
}
res = hdlr(sess, pp);
freePDU(pp);
return res;
}
return 1;
}
#define FUDGE (512 * 8)
/*
| We use the same memory for the response
| so make enough room ...
| XXX: must find a better way.
*/
int
addText(pdu_t *pp, char *fmt, ...)
{
u_int len;
char *str;
va_list ap;
va_start(ap, fmt);
len = vasprintf(&str, fmt, ap) + 1;
if((pp->ds_len + len) > 0xffffff) {
printf("ds overflow\n");
free(str);
return 0;
}
if((pp->ds_len + len) > pp->ds_size) {
u_char *np;
np = realloc(pp->ds_addr, pp->ds_size + len + FUDGE);
if(np == NULL) {
free(str);
//XXX: out of memory!
return -1;
}
pp->ds_addr = np;
pp->ds_size += len + FUDGE;
}
memcpy(pp->ds_addr + pp->ds_len, str, len);
pp->ds_len += len;
free(str);
return len;
}
void
freePDU(pdu_t *pp)
{
if(pp->ahs_size)
free(pp->ahs_addr);
if(pp->ds_size)
free(pp->ds_addr);
bzero(&pp->ipdu, sizeof(union ipdu_u));
pp->ahs_addr = NULL;
pp->ds_addr = NULL;
pp->ahs_size = 0;
pp->ds_size = pp->ds_len = 0;
}
static void
pukeText(char *it, pdu_t *pp)
{
char *ptr;
int cmd;
size_t len, n;
len = pp->ds_len;
ptr = (char *)pp->ds_addr;
cmd = pp->ipdu.bhs.opcode;
printf("%s: cmd=0x%x len=%d\n", it, cmd, (int)len);
while(len > 0) {
printf("\t%s\n", ptr);
n = strlen(ptr) + 1;
len -= n;
ptr += n;
}
}
|
