1 /* 2 * Copyright (c) 2000, Boris Popov 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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Boris Popov. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: nb_name.c,v 1.11 2004/12/11 05:23:59 lindak Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/socket.h> 37 #include <ctype.h> 38 #include <errno.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <strings.h> 43 #include <libintl.h> 44 #include <assert.h> 45 46 #include <netsmb/netbios.h> 47 #include <netsmb/smb_lib.h> 48 #include <netsmb/nb_lib.h> 49 #include <netsmb/mchain.h> 50 #include "private.h" 51 52 int 53 nb_snballoc(struct sockaddr_nb **dst) 54 { 55 struct sockaddr_nb *snb; 56 int slen; 57 58 slen = sizeof (struct sockaddr_nb); 59 snb = malloc(slen); 60 if (snb == NULL) 61 return (ENOMEM); 62 bzero(snb, slen); 63 snb->snb_family = AF_NETBIOS; 64 *dst = snb; 65 return (0); 66 } 67 68 void 69 nb_snbfree(struct sockaddr *snb) 70 { 71 free(snb); 72 } 73 74 /* 75 * Create a full NETBIOS address 76 * Passed names should already be upper case. 77 * Stores the names truncated or blank padded. 78 * NetBIOS name encoding happens later. 79 */ 80 int 81 nb_sockaddr(struct sockaddr *peer, struct nb_name *np, 82 struct sockaddr_nb **dst) 83 84 { 85 struct sockaddr_nb *snb; 86 struct sockaddr_in *sin; 87 int error; 88 89 if (peer && (peer->sa_family != AF_INET)) 90 return (EPROTONOSUPPORT); 91 error = nb_snballoc(&snb); 92 if (error) 93 return (error); 94 95 if (strcmp(np->nn_name, "*") == 0) { 96 /* Star is special: No blanks, type, etc. */ 97 snb->snb_name[0] = '*'; 98 } else { 99 /* Normal name: pad with blanks, add type. */ 100 snprintf(snb->snb_name, NB_NAMELEN, 101 "%-15.15s", np->nn_name); 102 snb->snb_name[15] = (char)np->nn_type; 103 } 104 105 if (peer) { 106 /*LINTED*/ 107 sin = (struct sockaddr_in *)peer; 108 snb->snb_ipaddr = sin->sin_addr.s_addr; 109 } 110 *dst = snb; 111 return (0); 112 } 113 114 int 115 nb_name_len(struct nb_name *np) 116 { 117 char *name; 118 int len, sclen; 119 120 len = 1 + NB_ENCNAMELEN; 121 if (np->nn_scope == NULL) 122 return (len + 1); 123 sclen = 0; 124 for (name = np->nn_scope; *name; name++) { 125 if (*name == '.') { 126 sclen = 0; 127 } else { 128 if (sclen < NB_MAXLABLEN) { 129 sclen++; 130 len++; 131 } 132 } 133 } 134 return (len + 1); 135 } 136 137 int 138 nb_encname_len(const uchar_t *str) 139 { 140 const uchar_t *cp = str; 141 int len, blen; 142 143 if ((cp[0] & 0xc0) == 0xc0) 144 return (-1); /* first two bytes are offset to name */ 145 146 len = 1; 147 for (;;) { 148 blen = *cp; 149 if (blen++ == 0) 150 break; 151 len += blen; 152 cp += blen; 153 } 154 return (len); 155 } 156 157 int 158 nb_name_encode(struct mbdata *mbp, struct nb_name *nn) 159 { 160 char *plen; 161 uchar_t ch; 162 char *p, namebuf[NB_NAMELEN+1]; 163 int i, lblen; 164 165 bcopy(nn->nn_name, namebuf, NB_NAMELEN); 166 namebuf[NB_NAMELEN-1] = (char)nn->nn_type; 167 namebuf[NB_NAMELEN] = '\0'; /* for debug */ 168 169 /* 170 * Do the NetBIOS "first-level encoding" here. 171 * (RFC1002 explains this weirdness...) 172 * 173 * Here is what we marshall: 174 * uint8_t NAME_LENGTH (always 32) 175 * uint8_t ENCODED_NAME[32] 176 * uint8_t SCOPE_LENGTH 177 * Scope follows here, then another null. 178 */ 179 180 /* NAME_LENGTH */ 181 mb_put_uint8(mbp, (2 * NB_NAMELEN)); 182 183 /* ENCODED_NAME */ 184 for (i = 0; i < NB_NAMELEN; i++) { 185 ch = namebuf[i]; 186 mb_put_uint8(mbp, 'A' + ((ch >> 4) & 0xF)); 187 mb_put_uint8(mbp, 'A' + ((ch) & 0xF)); 188 } 189 190 /* 191 * NetBIOS "scope" sting encoding, 192 * a.k.a second-level encoding. 193 * See RFC1002 for the details. 194 * 195 * Note: plen points to the length byte at the 196 * start of each string. This keeps a pointer 197 * to the location and fills it in after the 198 * length of the string is determined. 199 * 200 * One string of length zero terminates. 201 * With no scope string, the zero-length 202 * string is the only thing there. 203 */ 204 if (nn->nn_scope == NULL) { 205 mb_put_uint8(mbp, 0); 206 return (0); 207 } 208 209 (void) mb_fit(mbp, 1, &plen); 210 *plen = 0; /* will update below */ 211 lblen = 0; 212 for (p = nn->nn_scope; ; p++) { 213 if (*p == '\0') { 214 *plen = lblen; 215 if (lblen) 216 mb_put_uint8(mbp, 0); 217 break; 218 } 219 if (*p == '.') { 220 *plen = lblen; 221 (void) mb_fit(mbp, 1, &plen); 222 *plen = 0; 223 lblen = 0; 224 } else { 225 if (lblen < NB_MAXLABLEN) { 226 mb_put_uint8(mbp, *p); 227 lblen++; 228 } 229 } 230 } 231 232 return (0); 233 } 234