pdu.c revision 171568
1171568Sscottl/*- 2171568Sscottl * Copyright (c) 2005 Daniel Braniss <danny@cs.huji.ac.il> 3171568Sscottl * All rights reserved. 4171568Sscottl * 5171568Sscottl * Redistribution and use in source and binary forms, with or without 6171568Sscottl * modification, are permitted provided that the following conditions 7171568Sscottl * are met: 8171568Sscottl * 1. Redistributions of source code must retain the above copyright 9171568Sscottl * notice, this list of conditions and the following disclaimer. 10171568Sscottl * 2. Redistributions in binary form must reproduce the above copyright 11171568Sscottl * notice, this list of conditions and the following disclaimer in the 12171568Sscottl * documentation and/or other materials provided with the distribution. 13171568Sscottl * 14171568Sscottl * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15171568Sscottl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16171568Sscottl * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17171568Sscottl * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18171568Sscottl * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19171568Sscottl * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20171568Sscottl * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21171568Sscottl * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22171568Sscottl * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23171568Sscottl * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24171568Sscottl * SUCH DAMAGE. 25171568Sscottl * 26171568Sscottl */ 27171568Sscottl/* 28171568Sscottl | $Id: pdu.c,v 2.2 2006/12/01 09:11:56 danny Exp danny $ 29171568Sscottl */ 30171568Sscottl 31171568Sscottl#include <sys/cdefs.h> 32171568Sscottl__FBSDID("$FreeBSD: head/sbin/iscontrol/pdu.c 171568 2007-07-24 15:35:02Z scottl $"); 33171568Sscottl 34171568Sscottl#include <sys/types.h> 35171568Sscottl#include <sys/time.h> 36171568Sscottl#include <sys/uio.h> 37171568Sscottl#include <sys/ioctl.h> 38171568Sscottl#include <unistd.h> 39171568Sscottl#include <stdlib.h> 40171568Sscottl#include <string.h> 41171568Sscottl#include <errno.h> 42171568Sscottl#include <stdio.h> 43171568Sscottl#include <stdarg.h> 44171568Sscottl#include <camlib.h> 45171568Sscottl 46171568Sscottl#include "iscsi.h" 47171568Sscottl#include "iscontrol.h" 48171568Sscottl#include "pdu.h" 49171568Sscottl 50171568Sscottlint 51171568Sscottlxmitpdu(isess_t *sess, pdu_t *pp) 52171568Sscottl{ 53171568Sscottl if(ioctl(sess->fd, ISCSISEND, pp)) { 54171568Sscottl perror("xmitpdu"); 55171568Sscottl return -1; 56171568Sscottl } 57171568Sscottl if(vflag) 58171568Sscottl pukeText("I-", pp); 59171568Sscottl 60171568Sscottl return 0; 61171568Sscottl} 62171568Sscottl 63171568Sscottlint 64171568Sscottlrecvpdu(isess_t *sess, pdu_t *pp) 65171568Sscottl{ 66171568Sscottl if(ioctl(sess->fd, ISCSIRECV, pp)) { 67171568Sscottl perror("recvpdu"); 68171568Sscottl return -1; 69171568Sscottl } 70171568Sscottl // XXX: return error if truncated via 71171568Sscottl // the FUDGE factor. 72171568Sscottl if(vflag) 73171568Sscottl pukeText("T-", pp); 74171568Sscottl 75171568Sscottl return 0; 76171568Sscottl} 77171568Sscottl 78171568Sscottlint 79171568SscottlsendPDU(isess_t *sess, pdu_t *pp, handler_t *hdlr) 80171568Sscottl{ 81171568Sscottl if(xmitpdu(sess, pp)) 82171568Sscottl return 0; 83171568Sscottl if(hdlr) { 84171568Sscottl int res; 85171568Sscottl 86171568Sscottl pp->ahs_size = 8 * 1024; 87171568Sscottl if((pp->ahs = malloc(pp->ahs_size)) == NULL) { 88171568Sscottl fprintf(stderr, "out of mem!"); 89171568Sscottl return -1; 90171568Sscottl } 91171568Sscottl pp->ds_size = 0; 92171568Sscottl if((res = recvpdu(sess, pp)) != 0) { 93171568Sscottl fprintf(stderr, "recvpdu failed\n"); 94171568Sscottl return res; 95171568Sscottl } 96171568Sscottl res = hdlr(sess, pp); 97171568Sscottl freePDU(pp); 98171568Sscottl return res; 99171568Sscottl } 100171568Sscottl return 1; 101171568Sscottl} 102171568Sscottl 103171568Sscottl 104171568Sscottl#define FUDGE (512 * 8) 105171568Sscottl/* 106171568Sscottl | We use the same memory for the response 107171568Sscottl | so make enough room ... 108171568Sscottl | XXX: must find a better way. 109171568Sscottl */ 110171568Sscottlint 111171568SscottladdText(pdu_t *pp, char *fmt, ...) 112171568Sscottl{ 113171568Sscottl u_int len; 114171568Sscottl char *str; 115171568Sscottl va_list ap; 116171568Sscottl 117171568Sscottl va_start(ap, fmt); 118171568Sscottl len = vasprintf(&str, fmt, ap) + 1; 119171568Sscottl if((pp->ds_len + len) > 0xffffff) { 120171568Sscottl printf("ds overflow\n"); 121171568Sscottl free(str); 122171568Sscottl return 0; 123171568Sscottl } 124171568Sscottl 125171568Sscottl if((pp->ds_len + len) > pp->ds_size) { 126171568Sscottl u_char *np; 127171568Sscottl 128171568Sscottl np = realloc(pp->ds, pp->ds_size + len + FUDGE); 129171568Sscottl if(np == NULL) { 130171568Sscottl free(str); 131171568Sscottl //XXX: out of memory! 132171568Sscottl return -1; 133171568Sscottl } 134171568Sscottl pp->ds = np; 135171568Sscottl pp->ds_size += len + FUDGE; 136171568Sscottl } 137171568Sscottl memcpy(pp->ds + pp->ds_len, str, len); 138171568Sscottl pp->ds_len += len; 139171568Sscottl free(str); 140171568Sscottl return len; 141171568Sscottl} 142171568Sscottl 143171568Sscottlvoid 144171568SscottlfreePDU(pdu_t *pp) 145171568Sscottl{ 146171568Sscottl if(pp->ahs_size) 147171568Sscottl free(pp->ahs); 148171568Sscottl if(pp->ds_size) 149171568Sscottl free(pp->ds); 150171568Sscottl bzero(&pp->ipdu, sizeof(union ipdu_u)); 151171568Sscottl pp->ahs = NULL; 152171568Sscottl pp->ds = NULL; 153171568Sscottl pp->ahs_size = 0; 154171568Sscottl pp->ds_size = pp->ds_len = 0; 155171568Sscottl} 156171568Sscottl 157171568Sscottlvoid 158171568SscottlpukeText(char *it, pdu_t *pp) 159171568Sscottl{ 160171568Sscottl char *ptr; 161171568Sscottl int cmd; 162171568Sscottl size_t len, n; 163171568Sscottl 164171568Sscottl len = pp->ds_len; 165171568Sscottl ptr = (char *)pp->ds; 166171568Sscottl cmd = pp->ipdu.bhs.opcode; 167171568Sscottl 168171568Sscottl printf("%s: cmd=0x%x len=%d\n", it, cmd, (int)len); 169171568Sscottl while(len > 0) { 170171568Sscottl printf("\t%s\n", ptr); 171171568Sscottl n = strlen(ptr) + 1; 172171568Sscottl len -= n; 173171568Sscottl ptr += n; 174171568Sscottl } 175171568Sscottl} 176