tools/convertilines.c

   1 /* tools/convertilines.c
   2  * Copyright (c) 2002 Hybrid Development Team
   3  *
   4  *  Redistribution and use in source and binary forms, with or without
   5  *  modification, are permitted provided that the following conditions are
   6  *  met:
   7  *
   8  *  1.Redistributions of source code must retain the above copyright notice,
   9  *    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.The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  *  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  20  *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  24  *  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  25  *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  *  POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $Id: convertilines.c 6 2005-09-10 01:02:21Z nenolod $
  29  */
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <ctype.h>
  34 #include <string.h>
  35
  36 #define BUFSIZE 512
  37
  38 #define FLAGS_RESTRICTED        0x001
  39 #define FLAGS_EXCEEDLIMIT       0x002
  40 #define FLAGS_KLINEEXEMPT       0x004
  41 #define FLAGS_GLINEEXEMPT       0x008
  42 #define FLAGS_NEEDIDENT         0x010
  43 #define FLAGS_NOTILDE           0x020
  44
  45 struct flag_table_struct
  46 {
  47         const char *name;
  48         int flag;
  49 };
  50 static struct flag_table_struct flag_table[] =
  51 {
  52         { "restricted",         FLAGS_RESTRICTED        },
  53         { "exceed_limit",       FLAGS_EXCEEDLIMIT       },
  54         { "kline_exempt",       FLAGS_KLINEEXEMPT       },
  55         { "gline_exempt",       FLAGS_GLINEEXEMPT       },
  56         { "need_ident",         FLAGS_NEEDIDENT         },
  57         { "no_tilde",           FLAGS_NOTILDE           },
  58         { NULL, 0 }
  59 };
  60
  61 struct AuthBlock
  62 {
  63     struct AuthBlock *next;
  64
  65     char **hostname;
  66     int hostnum;
  67
  68     char *spoof;
  69     char *passwd;
  70     int class;
  71     int flags;
  72
  73     /* indicates one of above */
  74     int special;
  75     int specialk;
  76 };
  77
  78 static struct AuthBlock *auth_spoof = NULL;
  79 static struct AuthBlock *auth_special = NULL;
  80 static struct AuthBlock *auth_passwd = NULL;
  81 static struct AuthBlock *auth_general = NULL;
  82 static struct AuthBlock *auth_restricted = NULL;
  83
  84 static void ConvertConf(FILE* file,FILE *out);
  85 static void set_flags(struct AuthBlock *, const char *, const char *);
  86 static void usage(void);
  87 static char *getfield(char *);
  88 static struct AuthBlock *find_matching_conf(struct AuthBlock *);
  89 static void ReplaceQuotes(char *out, char *in);
  90 static void oldParseOneLine(FILE *out, char *in);
  91 static void write_auth_entries(FILE *out);
  92 static void write_specific(FILE *out, struct AuthBlock *);
  93 static int match(struct AuthBlock *, struct AuthBlock *);
  94
  95 int main(int argc,char *argv[])
  96 {
  97   FILE *in;
  98   FILE *out;
  99
 100   if(argc < 3)
 101     usage();
 102
 103   if((in = fopen(argv[1],"r")) == NULL)
 104   {
 105       fprintf(stderr, "Can't open %s for reading\n", argv[1]);
 106       usage();
 107   }
 108
 109   if((out = fopen(argv[2],"w")) == NULL)
 110   {
 111       fprintf(stderr, "Can't open %s for writing\n", argv[2]);
 112       usage();
 113   }
 114
 115   ConvertConf(in, out);
 116
 117   return 0;
 118 }
 119
 120 void usage()
 121 {
 122     fprintf(stderr, "convertilines conf.old conf.new\n");
 123     exit(-1);
 124 }
 125
 126 /*
 127  * ConvertConf()
 128  *    Read configuration file.
 129  *
 130  *
 131  * Inputs        - FILE* to config file to convert
 132  *               - FILE* to output for new style conf
 133  *
 134  */
 135
 136 #define MAXCONFLINKS 150
 137
 138 static void ConvertConf(FILE* file, FILE *out)
 139 {
 140   char             line[BUFSIZE];
 141   char             quotedLine[BUFSIZE];
 142   char*            p;
 143
 144   while (fgets(line, sizeof(line), file))
 145   {
 146       if ((p = strchr(line, '\n')))
 147           *p = '\0';
 148
 149       ReplaceQuotes(quotedLine,line);
 150
 151       if(!*quotedLine || quotedLine[0] == '#' || quotedLine[0] == '\n' ||
 152         quotedLine[0] == ' ' || quotedLine[0] == '\t')
 153           continue;
 154
 155       if(quotedLine[0] == '.')
 156       {
 157           char *filename;
 158           char *back;
 159
 160           if(!strncmp(quotedLine+1,"include ",8))
 161           {
 162               if( (filename = strchr(quotedLine+8,'"')) )
 163                   filename++;
 164               else
 165               {
 166                   fprintf(stderr, "Bad config line: %s", quotedLine);
 167                   continue;
 168               }
 169
 170               if((back = strchr(filename,'"')))
 171                   *back = '\0';
 172               else
 173               {
 174                   fprintf(stderr, "Bad config line: %s", quotedLine);
 175                   continue;
 176               }
 177
 178           }
 179       }
 180
 181       /* Could we test if it's conf line at all?        -Vesa */
 182       if (quotedLine[1] == ':')
 183           oldParseOneLine(out,quotedLine);
 184
 185   }
 186
 187   fclose(file);
 188
 189   write_auth_entries(out);
 190   fclose(out);
 191 }
 192
 193 /*
 194  * ReplaceQuotes
 195  * Inputs       - input line to quote
 196  * Output       - quoted line
 197  * Side Effects - All quoted chars in input are replaced
 198  *                with quoted values in output, # chars replaced with '\0'
 199  *                otherwise input is copied to output.
 200  */
 201 static void ReplaceQuotes(char* quotedLine,char *inputLine)
 202 {
 203   char *in;
 204   char *out;
 205   static char  quotes[] = {
 206     0,    /*  */
 207     0,    /* a */
 208     '\b', /* b */
 209     0,    /* c */
 210     0,    /* d */
 211     0,    /* e */
 212     '\f', /* f */
 213     0,    /* g */
 214     0,    /* h */
 215     0,    /* i */
 216     0,    /* j */
 217     0,    /* k */
 218     0,    /* l */
 219     0,    /* m */
 220     '\n', /* n */
 221     0,    /* o */
 222     0,    /* p */
 223     0,    /* q */
 224     '\r', /* r */
 225     0,    /* s */
 226     '\t', /* t */
 227     0,    /* u */
 228     '\v', /* v */
 229     0,    /* w */
 230     0,    /* x */
 231     0,    /* y */
 232     0,    /* z */
 233     0,0,0,0,0,0
 234     };
 235
 236   /*
 237    * Do quoting of characters and # detection.
 238    */
 239   for (out = quotedLine,in = inputLine; *in; out++, in++)
 240     {
 241       if (*in == '\\')
 242         {
 243           in++;
 244           if(*in == '\\')
 245             *out = '\\';
 246           else if(*in == '#')
 247             *out = '#';
 248           else
 249             *out = quotes[ (unsigned int) (*in & 0x1F) ];
 250         }
 251       else if (*in == '#')
 252         {
 253           *out = '\0';
 254           return;
 255         }
 256       else
 257         *out = *in;
 258     }
 259   *out = '\0';
 260 }
 261
 262 /*
 263  * oldParseOneLine
 264  * Inputs       - pointer to line to parse
 265  *              - pointer to output to write
 266  * Output       -
 267  * Side Effects - Parse one old style conf line.
 268  */
 269
 270 static void oldParseOneLine(FILE *out,char* line)
 271 {
 272   char conf_letter;
 273   char* tmp;
 274   const char* host_field=NULL;
 275   const char* passwd_field=NULL;
 276   const char* user_field=NULL;
 277   const char* port_field = NULL;
 278   const char* classconf_field = NULL;
 279   int class_field = 0;
 280
 281   tmp = getfield(line);
 282
 283   conf_letter = *tmp;
 284
 285   for (;;) /* Fake loop, that I can use break here --msa */
 286   {
 287       /* host field */
 288       if ((host_field = getfield(NULL)) == NULL)
 289         return;
 290
 291       /* pass field */
 292       if ((passwd_field = getfield(NULL)) == NULL)
 293         break;
 294
 295       /* user field */
 296       if ((user_field = getfield(NULL)) == NULL)
 297         break;
 298
 299       /* port field */
 300       if ((port_field = getfield(NULL)) == NULL)
 301         break;
 302
 303       /* class field */
 304       if ((classconf_field = getfield(NULL)) == NULL)
 305         break;
 306
 307       break;
 308   }
 309
 310   if (!passwd_field)
 311     passwd_field = "";
 312   if (!user_field)
 313     user_field = "";
 314   if (!port_field)
 315     port_field = "";
 316   if (classconf_field)
 317     class_field = atoi(classconf_field);
 318
 319   switch( conf_letter )
 320   {
 321     case 'i':
 322     case 'I':
 323     {
 324         struct AuthBlock *ptr;
 325         struct AuthBlock *tempptr;
 326
 327         tempptr = malloc(sizeof(struct AuthBlock));
 328         memset(tempptr, 0, sizeof(*tempptr));
 329
 330         if(conf_letter == 'i')
 331         {
 332             tempptr->flags |= FLAGS_RESTRICTED;
 333             tempptr->specialk = 1;
 334         }
 335
 336         if(passwd_field && *passwd_field)
 337             tempptr->passwd = strdup(passwd_field);
 338
 339         tempptr->class = class_field;
 340
 341         set_flags(tempptr, user_field, host_field);
 342
 343         /* dont add specials/passworded ones to existing auth blocks */
 344         if((ptr = find_matching_conf(tempptr)))
 345         {
 346             int authindex;
 347
 348             authindex = ptr->hostnum;
 349             ptr->hostnum++;
 350
 351             ptr->hostname = realloc((void *)ptr->hostname, ptr->hostnum * sizeof(void *));
 352
 353             ptr->hostname[authindex] = strdup(tempptr->hostname[0]);
 354
 355             free(tempptr->hostname[0]);
 356             free(tempptr->hostname);
 357             free(tempptr);
 358         }
 359         else
 360         {
 361             ptr = tempptr;
 362
 363             if(ptr->spoof)
 364             {
 365                 ptr->next = auth_spoof;
 366                 auth_spoof = ptr;
 367             }
 368             else if(ptr->special)
 369             {
 370                 ptr->next = auth_special;
 371                 auth_special = ptr;
 372             }
 373             else if(ptr->passwd)
 374             {
 375                 ptr->next = auth_passwd;
 376                 auth_passwd = ptr;
 377             }
 378             else if(ptr->specialk)
 379             {
 380                 ptr->next = auth_restricted;
 381                 auth_restricted = ptr;
 382             }
 383             else
 384             {
 385                 ptr->next = auth_general;
 386                 auth_general = ptr;
 387             }
 388         }
 389     }
 390     break;
 391
 392     default:
 393       break;
 394   }
 395 }
 396
 397 static void write_auth_entries(FILE *out)
 398 {
 399     struct AuthBlock *ptr;
 400
 401     for(ptr = auth_spoof; ptr; ptr = ptr->next)
 402         write_specific(out, ptr);
 403
 404     for(ptr = auth_special; ptr; ptr = ptr->next)
 405         write_specific(out, ptr);
 406
 407     for(ptr = auth_passwd; ptr; ptr = ptr->next)
 408         write_specific(out, ptr);
 409
 410     for(ptr = auth_general; ptr; ptr = ptr->next)
 411         write_specific(out, ptr);
 412
 413     for(ptr = auth_restricted; ptr; ptr = ptr->next)
 414         write_specific(out, ptr);
 415 }
 416
 417
 418 static void write_specific(FILE *out, struct AuthBlock *ptr)
 419 {
 420     int i;
 421     int prev = 0;
 422
 423     fprintf(out, "auth {\n");
 424
 425     for(i = 0; i < ptr->hostnum; i++)
 426         fprintf(out, "\tuser = \"%s\";\n", ptr->hostname[i]);
 427
 428     if(ptr->spoof)
 429         fprintf(out, "\tspoof = \"%s\";\n", ptr->spoof);
 430
 431     if(ptr->passwd)
 432         fprintf(out, "\tpassword = \"%s\";\n", ptr->passwd);
 433
 434     if(ptr->flags)
 435     {
 436             fprintf(out, "\tflags = ");
 437
 438             for(i = 0; flag_table[i].flag; i++)
 439             {
 440                     if(ptr->flags & flag_table[i].flag)
 441                     {
 442                             fprintf(out, "%s%s",
 443                                         prev ? ", " : "",
 444                                         flag_table[i].name);
 445                             prev = 1;
 446                     }
 447             }
 448
 449             fprintf(out, ";\n");
 450     }
 451
 452     fprintf(out, "\tclass = \"%d\";\n", ptr->class);
 453     fprintf(out, "};\n");
 454 }
 455
 456 /*
 457  * field breakup for ircd.conf file.
 458  */
 459 static char *getfield(char *newline)
 460 {
 461   static char *line = NULL;
 462   char  *end, *field;
 463
 464   if (newline)
 465     line = newline;
 466
 467   if (line == NULL)
 468     return(NULL);
 469
 470   field = line;
 471   if ((end = strchr(line,':')) == NULL)
 472     {
 473       line = NULL;
 474       if ((end = strchr(field,'\n')) == NULL)
 475         end = field + strlen(field);
 476     }
 477   else
 478     line = end + 1;
 479   *end = '\0';
 480   return(field);
 481 }
 482
 483 struct AuthBlock *find_matching_conf(struct AuthBlock *acptr)
 484 {
 485     struct AuthBlock *ptr;
 486
 487     for(ptr = auth_spoof; ptr; ptr = ptr->next)
 488     {
 489         if(match(ptr, acptr))
 490             return ptr;
 491     }
 492
 493     for(ptr = auth_special; ptr; ptr = ptr->next)
 494     {
 495         if(match(ptr, acptr))
 496             return ptr;
 497     }
 498
 499     for(ptr = auth_passwd; ptr; ptr = ptr->next)
 500     {
 501         if(match(ptr, acptr))
 502             return ptr;
 503     }
 504
 505     for(ptr = auth_restricted; ptr; ptr = ptr->next)
 506     {
 507         if(match(ptr, acptr))
 508             return ptr;
 509     }
 510
 511     for(ptr = auth_general; ptr; ptr = ptr->next)
 512     {
 513         if(match(ptr, acptr))
 514             return ptr;
 515     }
 516
 517
 518     return NULL;
 519 }
 520
 521 static int match(struct AuthBlock *ptr, struct AuthBlock *acptr)
 522 {
 523     if((ptr->class == acptr->class) &&
 524        (ptr->flags == acptr->flags))
 525     {
 526         const char *p1, *p2;
 527
 528         /* check the spoofs match.. */
 529         if(ptr->spoof)
 530            p1 = ptr->spoof;
 531         else
 532            p1 = "";
 533
 534         if(acptr->spoof)
 535            p2 = acptr->spoof;
 536         else
 537            p2 = "";
 538
 539         if(strcmp(p1, p2))
 540             return 0;
 541
 542         /* now check the passwords match.. */
 543         if(ptr->passwd)
 544             p1 = ptr->passwd;
 545         else
 546             p1 = "";
 547
 548         if(acptr->passwd)
 549             p2 = acptr->passwd;
 550         else
 551             p2 = "";
 552
 553         if(strcmp(p1, p2))
 554             return 0;
 555
 556         return 1;
 557     }
 558
 559     return 0;
 560 }
 561
 562 void set_flags(struct AuthBlock *ptr, const char *user_field, const char *host_field)
 563 {
 564   for(; *user_field; user_field++)
 565   {
 566       switch(*user_field)
 567       {
 568           case '=':
 569               if(host_field)
 570                   ptr->spoof = strdup(host_field);
 571
 572               ptr->special = 1;
 573               break;
 574
 575           case '-':
 576               ptr->flags |= FLAGS_NOTILDE;
 577               ptr->special = 1;
 578               break;
 579
 580           case '+':
 581               ptr->flags |= FLAGS_NEEDIDENT;
 582               ptr->specialk = 1;
 583               break;
 584
 585           case '^':        /* is exempt from k/g lines */
 586               ptr->flags |= FLAGS_KLINEEXEMPT;
 587               ptr->special = 1;
 588               break;
 589
 590           case '>':
 591               ptr->flags |= FLAGS_EXCEEDLIMIT;
 592               ptr->special = 1;
 593               break;
 594
 595           case '_':
 596               ptr->flags |= FLAGS_GLINEEXEMPT;
 597               ptr->special = 1;
 598               break;
 599
 600           case '!':
 601           case '$':
 602           case '%':
 603           case '&':
 604           case '<':
 605               break;
 606
 607           default:
 608           {
 609               int authindex;
 610               authindex = ptr->hostnum;
 611               ptr->hostnum++;
 612
 613               ptr->hostname = realloc((void *)ptr->hostname, ptr->hostnum * sizeof(void *));
 614
 615               /* if the IP field contains something useful, use that */
 616               if(strcmp(host_field, "NOMATCH") && (*host_field != 'x') &&
 617                 strcmp(host_field, "*") && !ptr->spoof)
 618                   ptr->hostname[authindex] = strdup(host_field);
 619               else
 620                   ptr->hostname[authindex] = strdup(user_field);
 621
 622               return;
 623           }
 624       }
 625   }
 626 }
 627