lib/libncp/ncpl_subr.c

   1 /*
   2  * Copyright (c) 1999, 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  * $FreeBSD: src/lib/libncp/ncpl_subr.c,v 1.3 2000/01/01 14:21:31 bp Exp $
  33  * $DragonFly: src/lib/libncp/ncpl_subr.c,v 1.5 2008/09/30 16:57:05 swildner Exp $
  34  */
  35
  36 #include <sys/param.h>
  37 #include <sys/types.h>
  38 #include <sys/errno.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/syscall.h>
  41 #include <unistd.h>
  42 #include <ctype.h>
  43 #include <string.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <stdarg.h>
  47
  48 #include <netncp/ncp_lib.h>
  49 #include <netncp/ncp_rcfile.h>
  50 #include <netncp/ncp_nls.h>
  51 /*#include <netncp/ncp_cfg.h>*/
  52 #include "ncp_mod.h"
  53
  54 extern char *__progname;
  55
  56 int sysentoffset;
  57
  58 void
  59 ncp_add_word_lh(struct ncp_buf *conn, u_int16_t x) {
  60         setwle(conn->packet, conn->rqsize, x);
  61         conn->rqsize += 2;
  62         return;
  63 }
  64
  65 void
  66 ncp_add_dword_lh(struct ncp_buf *conn, u_int32_t x) {
  67         setdle(conn->packet, conn->rqsize, x);
  68         conn->rqsize += 4;
  69         return;
  70 }
  71
  72 void
  73 ncp_add_word_hl(struct ncp_buf *conn, u_int16_t x){
  74         setwbe(conn->packet, conn->rqsize, x);
  75         conn->rqsize += 2;
  76         return;
  77 }
  78
  79 void
  80 ncp_add_dword_hl(struct ncp_buf *conn, u_int32_t x) {
  81         setdbe(conn->packet, conn->rqsize, x);
  82         conn->rqsize += 4;
  83         return;
  84 }
  85
  86 void
  87 ncp_add_mem(struct ncp_buf *conn, const void *source, int size) {
  88         memcpy(conn->packet+conn->rqsize, source, size);
  89         conn->rqsize += size;
  90         return;
  91 }
  92
  93 void
  94 ncp_add_mem_nls(struct ncp_buf *conn, const void *source, int size) {
  95         ncp_nls_mem_u2n(conn->packet+conn->rqsize, source, size);
  96         conn->rqsize += size;
  97         return;
  98 }
  99
 100 void
 101 ncp_add_pstring(struct ncp_buf *conn, const char *s) {
 102         int len = strlen(s);
 103         if (len > 255) {
 104                 ncp_printf("ncp_add_pstring: string too long: %s\n", s);
 105                 len = 255;
 106         }
 107         ncp_add_byte(conn, len);
 108         ncp_add_mem(conn, s, len);
 109         return;
 110 }
 111
 112 void
 113 ncp_add_handle_path(struct ncp_buf *conn, nuint32 volNumber, nuint32 dirNumber,
 114         int handleFlag, const char *path)
 115 {
 116         ncp_add_byte(conn, volNumber);
 117         ncp_add_dword_lh(conn, dirNumber);
 118         ncp_add_byte(conn, handleFlag);
 119         if (path) {
 120                 ncp_add_byte(conn, 1);          /* 1 component */
 121                 ncp_add_pstring(conn, path);
 122         } else {
 123                 ncp_add_byte(conn, 0);
 124         }
 125 }
 126
 127 void
 128 ncp_init_request(struct ncp_buf *conn) {
 129         conn->rqsize = 0;
 130         conn->rpsize = 0;
 131 }
 132
 133 void
 134 ncp_init_request_s(struct ncp_buf *conn, int subfn) {
 135         ncp_init_request(conn);
 136         ncp_add_word_lh(conn, 0);
 137         ncp_add_byte(conn, subfn);
 138 }
 139
 140 u_int16_t
 141 ncp_reply_word_hl(struct ncp_buf *conn, int offset) {
 142         return getwbe(ncp_reply_data(conn, offset), 0);
 143 }
 144
 145 u_int16_t
 146 ncp_reply_word_lh(struct ncp_buf *conn, int offset) {
 147         return getwle(ncp_reply_data(conn, offset), 0);
 148 }
 149
 150 u_int32_t
 151 ncp_reply_dword_hl(struct ncp_buf *conn, int offset) {
 152         return getdbe(ncp_reply_data(conn, offset), 0);
 153 }
 154
 155 u_int32_t
 156 ncp_reply_dword_lh(struct ncp_buf *conn, int offset) {
 157         return getdle(ncp_reply_data(conn, offset), 0);
 158 }
 159
 160
 161 int
 162 ncp_connect(struct ncp_conn_args *li, int *connHandle) {
 163         return syscall(NCP_CONNECT,li,connHandle);
 164 }
 165
 166 int
 167 ncp_disconnect(int cH) {
 168         DECLARE_RQ;
 169
 170         ncp_init_request(conn);
 171         ncp_add_byte(conn, NCP_CONN_CONNCLOSE);
 172         return ncp_conn_request(cH, conn);
 173 }
 174
 175 int
 176 ncp_request(int connHandle,int function, struct ncp_buf *ncpbuf){
 177         int err = syscall(SNCP_REQUEST,connHandle,function,ncpbuf);
 178         return (err<0) ? errno : 0;
 179 }
 180
 181 int
 182 ncp_conn_request(int connHandle, struct ncp_buf *ncpbuf){
 183         return syscall(SNCP_REQUEST, connHandle, NCP_CONN, ncpbuf);
 184 }
 185
 186 int
 187 ncp_conn_scan(struct ncp_conn_loginfo *li, int *connid) {
 188         return syscall(NCP_CONNSCAN,li, connid);
 189 }
 190
 191 NWCCODE
 192 NWRequest(NWCONN_HANDLE cH, nuint16 fn,
 193         nuint16 nrq, NW_FRAGMENT* rq,
 194         nuint16 nrp, NW_FRAGMENT* rp)
 195 {
 196         int error;
 197         struct ncp_conn_frag nf;
 198         DECLARE_RQ;
 199
 200         ncp_init_request(conn);
 201         ncp_add_byte(conn, NCP_CONN_FRAG);
 202         nf.fn = fn;
 203         nf.rqfcnt = nrq;
 204         nf.rqf = rq;
 205         nf.rpf = rp;
 206         nf.rpfcnt = nrp;
 207         ncp_add_mem(conn, &nf, sizeof(nf));
 208         error = ncp_conn_request(cH, conn);
 209         return error;
 210 }
 211
 212
 213 int
 214 ncp_initlib(void){
 215         int error;
 216         size_t len = sizeof(sysentoffset);
 217         int kv;
 218         size_t kvlen = sizeof(kv);
 219         static int ncp_initialized;
 220
 221         if (ncp_initialized)
 222                 return 0;
 223         error = sysctlbyname("net.ncp.sysent", &sysentoffset, &len, NULL, 0);
 224         if (error) {
 225                 fprintf(stderr, "%s: can't find kernel module\n", __func__);
 226                 return error;
 227         }
 228         error = sysctlbyname("net.ncp.version", &kv, &kvlen, NULL, 0);
 229         if (error) {
 230                 fprintf(stderr, "%s: kernel module is old, please recompile it.\n", __func__);
 231                 return error;
 232         }
 233         if (NCP_VERSION != kv) {
 234                 fprintf(stderr, "%s: kernel module version(%d) don't match library(%d).\n", __func__, kv, NCP_VERSION);
 235                 return EINVAL;
 236         }
 237         if ((error = ncp_nls_setrecode(0)) != 0) {
 238                 fprintf(stderr, "%s: can't initialise recode\n", __func__);
 239                 return error;
 240         }
 241         if ((error = ncp_nls_setlocale("")) != 0) {
 242                 fprintf(stderr, "%s: can't initialise locale\n", __func__);
 243                 return error;
 244         }
 245         ncp_initialized++;
 246         return 0;
 247 }
 248
 249
 250 /*
 251  */
 252 int     ncp_opterr = 1,         /* if error message should be printed */
 253         ncp_optind = 1,         /* index into parent argv vector */
 254         ncp_optopt,                     /* character checked for validity */
 255         ncp_optreset;           /* reset getopt */
 256 char    *ncp_optarg;            /* argument associated with option */
 257
 258 #define BADCH   (int)'?'
 259 #define BADARG  (int)':'
 260 #define EMSG    ""
 261
 262 int
 263 ncp_getopt(int nargc, char * const *nargv, const char *ostr)
 264 {
 265         static char *place = EMSG;              /* option letter processing */
 266         char *oli;                              /* option letter list index */
 267         int tmpind;
 268
 269         if (ncp_optreset || !*place) {          /* update scanning pointer */
 270                 ncp_optreset = 0;
 271                 tmpind = ncp_optind;
 272                 while (1) {
 273                         if (tmpind >= nargc) {
 274                                 place = EMSG;
 275                                 return (-1);
 276                         }
 277                         if (*(place = nargv[tmpind]) != '-') {
 278                                 tmpind++;
 279                                 continue;       /* lookup next option */
 280                         }
 281                         if (place[1] && *++place == '-') {      /* found "--" */
 282                                 ncp_optind = ++tmpind;
 283                                 place = EMSG;
 284                                 return (-1);
 285                         }
 286                         ncp_optind = tmpind;
 287                         break;
 288                 }
 289         }                                       /* option letter okay? */
 290         if ((ncp_optopt = (int)*place++) == (int)':' ||
 291             !(oli = strchr(ostr, ncp_optopt))) {
 292                 /*
 293                  * if the user didn't specify '-' as an option,
 294                  * assume it means -1.
 295                  */
 296                 if (ncp_optopt == (int)'-')
 297                         return (-1);
 298                 if (!*place)
 299                         ++ncp_optind;
 300                 if (ncp_opterr && *ostr != ':')
 301                         (void)fprintf(stderr,
 302                             "%s: illegal option -- %c\n", __progname, ncp_optopt);
 303                 return (BADCH);
 304         }
 305         if (*++oli != ':') {                    /* don't need argument */
 306                 ncp_optarg = NULL;
 307                 if (!*place)
 308                         ++ncp_optind;
 309         }
 310         else {                                  /* need an argument */
 311                 if (*place)                     /* no white space */
 312                         ncp_optarg = place;
 313                 else if (nargc <= ++ncp_optind) {       /* no arg */
 314                         place = EMSG;
 315                         if (*ostr == ':')
 316                                 return (BADARG);
 317                         if (ncp_opterr)
 318                                 (void)fprintf(stderr,
 319                                     "%s: option requires an argument -- %c\n",
 320                                     __progname, ncp_optopt);
 321                         return (BADCH);
 322                 }
 323                 else                            /* white space */
 324                         ncp_optarg = nargv[ncp_optind];
 325                 place = EMSG;
 326                 ++ncp_optind;
 327         }
 328         return (ncp_optopt);                    /* dump back option letter */
 329 }
 330 /*
 331  * misc options parsing routines
 332  */
 333 int
 334 ncp_args_parserc(struct ncp_args *na, char *sect, ncp_setopt_t *set_callback) {
 335         int len, error;
 336
 337         for (; na->opt; na++) {
 338                 switch (na->at) {
 339                     case NCA_STR:
 340                         if (rc_getstringptr(ncp_rc,sect,na->name,&na->str) == 0) {
 341                                 len = strlen(na->str);
 342                                 if (len > na->ival) {
 343                                         fprintf(stderr,"rc: Argument for option '%c' (%s) too long\n",na->opt,na->name);
 344                                         return EINVAL;
 345                                 }
 346                                 set_callback(na);
 347                         }
 348                         break;
 349                     case NCA_BOOL:
 350                         error = rc_getbool(ncp_rc,sect,na->name,&na->ival);
 351                         if (error == ENOENT) break;
 352                         if (error) return EINVAL;
 353                         set_callback(na);
 354                         break;
 355                     case NCA_INT:
 356                         if (rc_getint(ncp_rc,sect,na->name,&na->ival) == 0) {
 357                                 if (((na->flag & NAFL_HAVEMIN) &&
 358                                      (na->ival < na->min)) ||
 359                                     ((na->flag & NAFL_HAVEMAX) &&
 360                                      (na->ival > na->max))) {
 361                                         fprintf(stderr,"rc: Argument for option '%c' (%s) should be in [%d-%d] range\n",na->opt,na->name,na->min,na->max);
 362                                         return EINVAL;
 363                                 }
 364                                 set_callback(na);
 365                         };
 366                         break;
 367                     default:
 368                         break;
 369                 }
 370         }
 371         return 0;
 372 }
 373
 374 int
 375 ncp_args_parseopt(struct ncp_args *na, int opt, char *optarg, ncp_setopt_t *set_callback) {
 376         int len;
 377
 378         for (; na->opt; na++) {
 379                 if (na->opt != opt) continue;
 380                 switch (na->at) {
 381                     case NCA_STR:
 382                         na->str = optarg;
 383                         if (optarg) {
 384                                 len = strlen(na->str);
 385                                 if (len > na->ival) {
 386                                         fprintf(stderr,"opt: Argument for option '%c' (%s) too long\n",na->opt,na->name);
 387                                         return EINVAL;
 388                                 }
 389                                 set_callback(na);
 390                         }
 391                         break;
 392                     case NCA_BOOL:
 393                         na->ival = 0;
 394                         set_callback(na);
 395                         break;
 396                     case NCA_INT:
 397                         errno = 0;
 398                         na->ival = strtol(optarg, NULL, 0);
 399                         if (errno) {
 400                                 fprintf(stderr,"opt: Invalid integer value for option '%c' (%s).\n",na->opt,na->name);
 401                                 return EINVAL;
 402                         }
 403                         if (((na->flag & NAFL_HAVEMIN) &&
 404                              (na->ival < na->min)) ||
 405                             ((na->flag & NAFL_HAVEMAX) &&
 406                              (na->ival > na->max))) {
 407                                 fprintf(stderr,"opt: Argument for option '%c' (%s) should be in [%d-%d] range\n",na->opt,na->name,na->min,na->max);
 408                                 return EINVAL;
 409                         }
 410                         set_callback(na);
 411                         break;
 412                     default:
 413                         break;
 414                 }
 415                 break;
 416         }
 417         return 0;
 418 }
 419
 420 /*
 421  * Print a (descriptive) error message
 422  * error values:
 423  *         0 - no specific error code available;
 424  *  -999..-1 - NDS error
 425  *  1..32767 - system error
 426  *  the rest - requester error;
 427  */
 428 void
 429 ncp_error(char *fmt, int error,...) {
 430         va_list ap;
 431
 432         fprintf(stderr, "%s: ", __progname);
 433         va_start(ap, error);
 434         vfprintf(stderr, fmt, ap);
 435         va_end(ap);
 436         if (error == -1)
 437                 error = errno;
 438         if (error > -1000 && error < 0) {
 439                 fprintf(stderr, ": dserr = %d\n", error);
 440         } else if (error & 0x8000) {
 441                 fprintf(stderr, ": nwerr = %04x\n", error);
 442         } else if (error) {
 443                 fprintf(stderr, ": syserr = %s\n", strerror(error));
 444         } else
 445                 fprintf(stderr, "\n");
 446 }
 447
 448 char *
 449 ncp_printb(char *dest, int flags, const struct ncp_bitname *bnp) {
 450         int first = 1;
 451
 452         strcpy(dest, "<");
 453         for(; bnp->bn_bit; bnp++) {
 454                 if (flags & bnp->bn_bit) {
 455                         strcat(dest, bnp->bn_name);
 456                         first = 0;
 457                 }
 458                 if (!first && (flags & bnp[1].bn_bit))
 459                         strcat(dest, "|");
 460         }
 461         strcat(dest, ">");
 462         return dest;
 463 }