1 /*- 2 * Copyright (c) 2005-2008 Daniel Braniss <danny@cs.huji.ac.il> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 /* 28 | $Id: pdu.c,v 2.2 2006/12/01 09:11:56 danny Exp danny $ 29 */ 30 31 #include <sys/cdefs.h> 32 33 #include <sys/types.h> 34 #include <sys/time.h> 35 #include <sys/uio.h> 36 #include <sys/ioctl.h> 37 #include <unistd.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <errno.h> 41 #include <stdio.h> 42 #include <stdarg.h> 43 #include <camlib.h> 44 45 #include "iscsi.h" 46 #include "iscontrol.h" 47 48 int 49 xmitpdu(isess_t *sess, pdu_t *pp) 50 { 51 if(ioctl(sess->fd, ISCSISEND, pp)) { 52 perror("xmitpdu"); 53 return -1; 54 } 55 if(vflag) 56 pukeText("I-", pp); 57 58 return 0; 59 } 60 61 int 62 recvpdu(isess_t *sess, pdu_t *pp) 63 { 64 if(ioctl(sess->fd, ISCSIRECV, pp)) { 65 perror("recvpdu"); 66 return -1; 67 } 68 // XXX: return error if truncated via 69 // the FUDGE factor. 70 if(vflag) 71 pukeText("T-", pp); 72 73 return 0; 74 } 75 76 int 77 sendPDU(isess_t *sess, pdu_t *pp, handler_t *hdlr) 78 { 79 if(xmitpdu(sess, pp)) 80 return 0; 81 if(hdlr) { 82 int res; 83 84 pp->ahs_size = 8 * 1024; 85 if((pp->ahs = malloc(pp->ahs_size)) == NULL) { 86 fprintf(stderr, "out of mem!"); 87 return -1; 88 } 89 pp->ds_size = 0; 90 if((res = recvpdu(sess, pp)) != 0) { 91 fprintf(stderr, "recvpdu failed\n"); 92 return res; 93 } 94 res = hdlr(sess, pp); 95 freePDU(pp); 96 return res; 97 } 98 return 1; 99 } 100 101 102 #define FUDGE (512 * 8) 103 /* 104 | We use the same memory for the response 105 | so make enough room ... 106 | XXX: must find a better way. 107 */ 108 int 109 addText(pdu_t *pp, char *fmt, ...) 110 { 111 u_int len; 112 char *str; 113 va_list ap; 114 115 va_start(ap, fmt); 116 len = vasprintf(&str, fmt, ap) + 1; 117 if((pp->ds_len + len) > 0xffffff) { 118 printf("ds overflow\n"); 119 free(str); 120 return 0; 121 } 122 123 if((pp->ds_len + len) > pp->ds_size) { 124 u_char *np; 125 126 np = realloc(pp->ds, pp->ds_size + len + FUDGE); 127 if(np == NULL) { 128 free(str); 129 //XXX: out of memory! 130 return -1; 131 } 132 pp->ds = np; 133 pp->ds_size += len + FUDGE; 134 } 135 memcpy(pp->ds + pp->ds_len, str, len); 136 pp->ds_len += len; 137 free(str); 138 return len; 139 } 140 141 void 142 freePDU(pdu_t *pp) 143 { 144 if(pp->ahs_size) 145 free(pp->ahs); 146 if(pp->ds_size) 147 free(pp->ds); 148 bzero(&pp->ipdu, sizeof(union ipdu_u)); 149 pp->ahs = NULL; 150 pp->ds = NULL; 151 pp->ahs_size = 0; 152 pp->ds_size = pp->ds_len = 0; 153 } 154 155 void 156 pukeText(char *it, pdu_t *pp) 157 { 158 char *ptr; 159 int cmd; 160 size_t len, n; 161 162 len = pp->ds_len; 163 ptr = (char *)pp->ds; 164 cmd = pp->ipdu.bhs.opcode; 165 166 printf("%s: cmd=0x%x len=%d\n", it, cmd, (int)len); 167 while(len > 0) { 168 printf("\t%s\n", ptr); 169 n = strlen(ptr) + 1; 170 len -= n; 171 ptr += n; 172 } 173 } 174