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         int len = sizeof(sysentoffset);
 217         int kv, kvlen = sizeof(kv);
 218         static int ncp_initialized;
 219
 220         if (ncp_initialized)
 221                 return 0;
 222         error = sysctlbyname("net.ncp.sysent", &sysentoffset, &len, NULL, 0);
 223         if (error) {
 224                 fprintf(stderr, "%s: can't find kernel module\n", __func__);
 225                 return error;
 226         }
 227         error = sysctlbyname("net.ncp.version", &kv, &kvlen, NULL, 0);
 228         if (error) {
 229                 fprintf(stderr, "%s: kernel module is old, please recompile it.\n", __func__);
 230                 return error;
 231         }
 232         if (NCP_VERSION != kv) {
 233                 fprintf(stderr, "%s: kernel module version(%d) don't match library(%d).\n", __func__, kv, NCP_VERSION);
 234                 return EINVAL;
 235         }
 236         if ((error = ncp_nls_setrecode(0)) != 0) {
 237                 fprintf(stderr, "%s: can't initialise recode\n", __func__);
 238                 return error;
 239         }
 240         if ((error = ncp_nls_setlocale("")) != 0) {
 241                 fprintf(stderr, "%s: can't initialise locale\n", __func__);
 242                 return error;
 243         }
 244         ncp_initialized++;
 245         return 0;
 246 }
 247
 248
 249 /*
 250  */
 251 int     ncp_opterr = 1,         /* if error message should be printed */
 252         ncp_optind = 1,         /* index into parent argv vector */
 253         ncp_optopt,                     /* character checked for validity */
 254         ncp_optreset;           /* reset getopt */
 255 char    *ncp_optarg;            /* argument associated with option */
 256
 257 #define BADCH   (int)'?'
 258 #define BADARG  (int)':'
 259 #define EMSG    ""
 260
 261 int
 262 ncp_getopt(int nargc, char * const *nargv, const char *ostr)
 263 {
 264         static char *place = EMSG;              /* option letter processing */
 265         char *oli;                              /* option letter list index */
 266         int tmpind;
 267
 268         if (ncp_optreset || !*place) {          /* update scanning pointer */
 269                 ncp_optreset = 0;
 270                 tmpind = ncp_optind;
 271                 while (1) {
 272                         if (tmpind >= nargc) {
 273                                 place = EMSG;
 274                                 return (-1);
 275                         }
 276                         if (*(place = nargv[tmpind]) != '-') {
 277                                 tmpind++;
 278                                 continue;       /* lookup next option */
 279                         }
 280                         if (place[1] && *++place == '-') {      /* found "--" */
 281                                 ncp_optind = ++tmpind;
 282                                 place = EMSG;
 283                                 return (-1);
 284                         }
 285                         ncp_optind = tmpind;
 286                         break;
 287                 }
 288         }                                       /* option letter okay? */
 289         if ((ncp_optopt = (int)*place++) == (int)':' ||
 290             !(oli = strchr(ostr, ncp_optopt))) {
 291                 /*
 292                  * if the user didn't specify '-' as an option,
 293                  * assume it means -1.
 294                  */
 295                 if (ncp_optopt == (int)'-')
 296                         return (-1);
 297                 if (!*place)
 298                         ++ncp_optind;
 299                 if (ncp_opterr && *ostr != ':')
 300                         (void)fprintf(stderr,
 301                             "%s: illegal option -- %c\n", __progname, ncp_optopt);
 302                 return (BADCH);
 303         }
 304         if (*++oli != ':') {                    /* don't need argument */
 305                 ncp_optarg = NULL;
 306                 if (!*place)
 307                         ++ncp_optind;
 308         }
 309         else {                                  /* need an argument */
 310                 if (*place)                     /* no white space */
 311                         ncp_optarg = place;
 312                 else if (nargc <= ++ncp_optind) {       /* no arg */
 313                         place = EMSG;
 314                         if (*ostr == ':')
 315                                 return (BADARG);
 316                         if (ncp_opterr)
 317                                 (void)fprintf(stderr,
 318                                     "%s: option requires an argument -- %c\n",
 319                                     __progname, ncp_optopt);
 320                         return (BADCH);
 321                 }
 322                 else                            /* white space */
 323                         ncp_optarg = nargv[ncp_optind];
 324                 place = EMSG;
 325                 ++ncp_optind;
 326         }
 327         return (ncp_optopt);                    /* dump back option letter */
 328 }
 329 /*
 330  * misc options parsing routines
 331  */
 332 int
 333 ncp_args_parserc(struct ncp_args *na, char *sect, ncp_setopt_t *set_callback) {
 334         int len, error;
 335
 336         for (; na->opt; na++) {
 337                 switch (na->at) {
 338                     case NCA_STR:
 339                         if (rc_getstringptr(ncp_rc,sect,na->name,&na->str) == 0) {
 340                                 len = strlen(na->str);
 341                                 if (len > na->ival) {
 342                                         fprintf(stderr,"rc: Argument for option '%c' (%s) too long\n",na->opt,na->name);
 343                                         return EINVAL;
 344                                 }
 345                                 set_callback(na);
 346                         }
 347                         break;
 348                     case NCA_BOOL:
 349                         error = rc_getbool(ncp_rc,sect,na->name,&na->ival);
 350                         if (error == ENOENT) break;
 351                         if (error) return EINVAL;
 352                         set_callback(na);
 353                         break;
 354                     case NCA_INT:
 355                         if (rc_getint(ncp_rc,sect,na->name,&na->ival) == 0) {
 356                                 if (((na->flag & NAFL_HAVEMIN) &&
 357                                      (na->ival < na->min)) ||
 358                                     ((na->flag & NAFL_HAVEMAX) &&
 359                                      (na->ival > na->max))) {
 360                                         fprintf(stderr,"rc: Argument for option '%c' (%s) should be in [%d-%d] range\n",na->opt,na->name,na->min,na->max);
 361                                         return EINVAL;
 362                                 }
 363                                 set_callback(na);
 364                         };
 365                         break;
 366                     default:
 367                         break;
 368                 }
 369         }
 370         return 0;
 371 }
 372
 373 int
 374 ncp_args_parseopt(struct ncp_args *na, int opt, char *optarg, ncp_setopt_t *set_callback) {
 375         int len;
 376
 377         for (; na->opt; na++) {
 378                 if (na->opt != opt) continue;
 379                 switch (na->at) {
 380                     case NCA_STR:
 381                         na->str = optarg;
 382                         if (optarg) {
 383                                 len = strlen(na->str);
 384                                 if (len > na->ival) {
 385                                         fprintf(stderr,"opt: Argument for option '%c' (%s) too long\n",na->opt,na->name);
 386                                         return EINVAL;
 387                                 }
 388                                 set_callback(na);
 389                         }
 390                         break;
 391                     case NCA_BOOL:
 392                         na->ival = 0;
 393                         set_callback(na);
 394                         break;
 395                     case NCA_INT:
 396                         errno = 0;
 397                         na->ival = strtol(optarg, NULL, 0);
 398                         if (errno) {
 399                                 fprintf(stderr,"opt: Invalid integer value for option '%c' (%s).\n",na->opt,na->name);
 400                                 return EINVAL;
 401                         }
 402                         if (((na->flag & NAFL_HAVEMIN) &&
 403                              (na->ival < na->min)) ||
 404                             ((na->flag & NAFL_HAVEMAX) &&
 405                              (na->ival > na->max))) {
 406                                 fprintf(stderr,"opt: Argument for option '%c' (%s) should be in [%d-%d] range\n",na->opt,na->name,na->min,na->max);
 407                                 return EINVAL;
 408                         }
 409                         set_callback(na);
 410                         break;
 411                     default:
 412                         break;
 413                 }
 414                 break;
 415         }
 416         return 0;
 417 }
 418
 419 /*
 420  * Print a (descriptive) error message
 421  * error values:
 422  *         0 - no specific error code available;
 423  *  -999..-1 - NDS error
 424  *  1..32767 - system error
 425  *  the rest - requester error;
 426  */
 427 void
 428 ncp_error(char *fmt, int error,...) {
 429         va_list ap;
 430
 431         fprintf(stderr, "%s: ", __progname);
 432         va_start(ap, error);
 433         vfprintf(stderr, fmt, ap);
 434         va_end(ap);
 435         if (error == -1)
 436                 error = errno;
 437         if (error > -1000 && error < 0) {
 438                 fprintf(stderr, ": dserr = %d\n", error);
 439         } else if (error & 0x8000) {
 440                 fprintf(stderr, ": nwerr = %04x\n", error);
 441         } else if (error) {
 442                 fprintf(stderr, ": syserr = %s\n", strerror(error));
 443         } else
 444                 fprintf(stderr, "\n");
 445 }
 446
 447 char *
 448 ncp_printb(char *dest, int flags, const struct ncp_bitname *bnp) {
 449         int first = 1;
 450
 451         strcpy(dest, "<");
 452         for(; bnp->bn_bit; bnp++) {
 453                 if (flags & bnp->bn_bit) {
 454                         strcat(dest, bnp->bn_name);
 455                         first = 0;
 456                 }
 457                 if (!first && (flags & bnp[1].bn_bit))
 458                         strcat(dest, "|");
 459         }
 460         strcat(dest, ">");
 461         return dest;
 462 }