extcap_parser.c

   1 /* extcap_parser.c
   2  *
   3  * Routines for extcap external capture
   4  * Copyright 2013, Mike Ryan <mikeryan@lacklustre.net>
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include <config.h>
  26
  27 #include <stdio.h>
  28 #include <glib.h>
  29 #include <string.h>
  30
  31 #include "extcap_parser.h"
  32
  33 void extcap_printf_complex(extcap_complex *comp) {
  34     gchar *ret = extcap_get_complex_as_string(comp);
  35     printf("%s", ret);
  36     g_free(ret);
  37 }
  38
  39 gchar *extcap_get_complex_as_string(extcap_complex *comp) {
  40     /* Pick an arbitrary size that should be big enough */
  41     gchar *ret = g_new(gchar, 32);
  42
  43     if (comp == NULL) {
  44         g_snprintf(ret, 32, "(null)");
  45         return ret;
  46     }
  47
  48     switch (comp->complex_type) {
  49     case EXTCAP_ARG_INTEGER:
  50         g_snprintf(ret, 32, "%d", comp->complex_value.int_value);
  51         break;
  52     case EXTCAP_ARG_UNSIGNED:
  53         g_snprintf(ret, 32, "%u", comp->complex_value.uint_value);
  54         break;
  55     case EXTCAP_ARG_LONG:
  56         g_snprintf(ret, 32, "%ld", comp->complex_value.long_value);
  57         break;
  58     case EXTCAP_ARG_DOUBLE:
  59         g_snprintf(ret, 32, "%f", comp->complex_value.double_value);
  60         break;
  61     case EXTCAP_ARG_BOOLEAN:
  62         g_snprintf(ret, 32, "%s",
  63                 comp->complex_value.bool_value ? "TRUE" : "FALSE");
  64         break;
  65     case EXTCAP_ARG_STRING:
  66     case EXTCAP_ARG_FILESELECT:
  67         g_free(ret);
  68         ret = g_strdup(comp->complex_value.string_value);
  69         break;
  70     default:
  71         /* Nulling out the return string */
  72         g_snprintf(ret, 32, " ");
  73         break;
  74     }
  75
  76     return ret;
  77 }
  78
  79 extcap_complex *extcap_parse_complex(extcap_arg_type complex_type,
  80         const gchar *data) {
  81     extcap_complex *rc = g_new(extcap_complex, 1);
  82     gboolean success = FALSE;
  83     long double exp_f;
  84
  85     switch (complex_type) {
  86     case EXTCAP_ARG_INTEGER:
  87         if (sscanf(data, "%Lf", &exp_f) == 1) {
  88             rc->complex_value.int_value = (int) exp_f;
  89             success = TRUE;
  90             break;
  91         }
  92         break;
  93     case EXTCAP_ARG_UNSIGNED:
  94         if (sscanf(data, "%Lf", &exp_f) == 1) {
  95             rc->complex_value.uint_value = (unsigned int) exp_f;
  96             success = TRUE;
  97             break;
  98         }
  99         break;
 100     case EXTCAP_ARG_LONG:
 101         if (sscanf(data, "%Lf", &exp_f) == 1) {
 102             rc->complex_value.long_value = (long) exp_f;
 103             success = TRUE;
 104             break;
 105         }
 106         break;
 107     case EXTCAP_ARG_DOUBLE:
 108         if (sscanf(data, "%Lf", &exp_f) == 1) {
 109             rc->complex_value.double_value = (double) exp_f;
 110             success = TRUE;
 111             break;
 112         }
 113         break;
 114     case EXTCAP_ARG_BOOLEAN:
 115     case EXTCAP_ARG_BOOLFLAG:
 116         if (data[0] == 't' || data[0] == 'T' || data[0] == '1') {
 117             rc->complex_value.bool_value = 1;
 118         } else {
 119             rc->complex_value.bool_value = 0;
 120         }
 121         success = TRUE;
 122         break;
 123     case EXTCAP_ARG_STRING:
 124     case EXTCAP_ARG_FILESELECT:
 125         rc->complex_value.string_value = g_strdup(data);
 126         success = TRUE;
 127         break;
 128     default:
 129         break;
 130     }
 131
 132     if (!success) {
 133         g_free(rc);
 134         return NULL ;
 135     }
 136
 137     rc->complex_type = complex_type;
 138     rc->value_filled = TRUE;
 139
 140     return rc;
 141 }
 142
 143 gboolean extcap_compare_is_default(extcap_arg *element, extcap_complex *test) {
 144     gboolean result = FALSE;
 145
 146     if (element->default_complex == NULL)
 147         return result;
 148
 149     switch (element->arg_type) {
 150     case EXTCAP_ARG_INTEGER:
 151         if (extcap_complex_get_int(test)
 152                 == extcap_complex_get_int(element->default_complex))
 153             result = TRUE;
 154         break;
 155     case EXTCAP_ARG_UNSIGNED:
 156         if (extcap_complex_get_uint(test)
 157                 == extcap_complex_get_uint(element->default_complex))
 158             result = TRUE;
 159         break;
 160     case EXTCAP_ARG_LONG:
 161         if (extcap_complex_get_long(test)
 162                 == extcap_complex_get_long(element->default_complex))
 163             result = TRUE;
 164         break;
 165     case EXTCAP_ARG_DOUBLE:
 166         if (extcap_complex_get_double(test)
 167                 == extcap_complex_get_double(element->default_complex))
 168             result = TRUE;
 169         break;
 170     case EXTCAP_ARG_BOOLEAN:
 171     case EXTCAP_ARG_BOOLFLAG:
 172         if (extcap_complex_get_bool(test)
 173                 == extcap_complex_get_bool(element->default_complex))
 174             result = TRUE;
 175         break;
 176     case EXTCAP_ARG_STRING:
 177         if (strcmp(extcap_complex_get_string(test),
 178                 extcap_complex_get_string(element->default_complex)) == 0)
 179             result = TRUE;
 180         break;
 181
 182     default:
 183         break;
 184     }
 185
 186     return result;
 187 }
 188
 189 void extcap_free_complex(extcap_complex *comp) {
 190     if (comp->complex_type == EXTCAP_ARG_STRING
 191             || comp->complex_type == EXTCAP_ARG_FILESELECT)
 192         g_free(comp->complex_value.string_value);
 193
 194     g_free(comp);
 195 }
 196
 197 int extcap_complex_get_int(extcap_complex *comp) {
 198     if ( comp == NULL )
 199         return (int)0;
 200     return comp->complex_value.int_value;
 201 }
 202
 203 unsigned int extcap_complex_get_uint(extcap_complex *comp) {
 204     if ( comp == NULL )
 205         return (unsigned int)0;
 206     return comp->complex_value.uint_value;
 207 }
 208
 209 long extcap_complex_get_long(extcap_complex *comp) {
 210     if ( comp == NULL )
 211         return (long)0;
 212     return comp->complex_value.long_value;
 213 }
 214
 215 double extcap_complex_get_double(extcap_complex *comp) {
 216     if ( comp == NULL )
 217         return (double)0;
 218     return comp->complex_value.double_value;
 219 }
 220
 221 gboolean extcap_complex_get_bool(extcap_complex *comp) {
 222     if ( comp == NULL )
 223         return FALSE;
 224     return comp->complex_value.bool_value;
 225 }
 226
 227 gchar *extcap_complex_get_string(extcap_complex *comp) {
 228     return comp->complex_value.string_value;
 229 }
 230
 231 void extcap_free_tokenized_param(extcap_token_param *v) {
 232     if (v == NULL)
 233         return;
 234
 235     if (v->arg != NULL)
 236         g_free(v->arg);
 237
 238     if (v->value != NULL)
 239         g_free(v->value);
 240
 241     g_free(v);
 242 }
 243
 244 void extcap_free_tokenized_sentence(extcap_token_sentence *s) {
 245     extcap_token_param *tv;
 246
 247     if (s == NULL)
 248         return;
 249
 250     if (s->sentence != NULL)
 251         g_free(s->sentence);
 252
 253     while (s->param_list != NULL ) {
 254         tv = s->param_list;
 255         s->param_list = tv->next_token;
 256
 257         extcap_free_tokenized_param(tv);
 258     }
 259 }
 260
 261 void extcap_free_tokenized_sentence_list(extcap_token_sentence *f) {
 262     extcap_token_sentence *t;
 263
 264     while (f != NULL ) {
 265         t = f->next_sentence;
 266         extcap_free_tokenized_sentence(f);
 267         f = t;
 268     }
 269 }
 270
 271 extcap_token_sentence *extcap_tokenize_sentence(const gchar *s) {
 272     gchar *b, *e, *eq;
 273
 274     extcap_token_param *tv = NULL;
 275
 276     extcap_token_sentence *rs = g_new(extcap_token_sentence, 1);
 277
 278     rs->sentence = NULL;
 279     rs->next_sentence = NULL;
 280     rs->param_list = NULL;
 281
 282     if ((b = g_strstr_len(s, -1, " ")) == NULL) {
 283         extcap_free_tokenized_sentence(rs);
 284         return NULL ;
 285     }
 286
 287     rs->sentence = g_strndup(s, b - s);
 288
 289     if ((b = g_strstr_len(s, -1, "{")) == NULL) {
 290         /* printf("debug - tokenizer - sentence with no values\n"); */
 291         extcap_free_tokenized_sentence(rs);
 292         return NULL ;
 293     }
 294
 295     while (b != NULL ) {
 296         if ((e = g_strstr_len(b, -1, "}")) == NULL) {
 297             /* printf("debug - tokenizer - invalid, missing }\n"); */
 298             extcap_free_tokenized_sentence(rs);
 299             return NULL ;
 300         }
 301
 302         if ((eq = g_strstr_len(b, -1, "=")) == NULL) {
 303             /* printf("debug - tokenizer - invalid, missing =\n"); */
 304             extcap_free_tokenized_sentence(rs);
 305             return NULL ;
 306         }
 307
 308         b++;
 309         e--;
 310
 311         if (b >= eq || e <= eq) {
 312             /* printf("debug - tokenizer - invalid, missing arg or value in {}\n"); */
 313             extcap_free_tokenized_sentence(rs);
 314             return NULL ;
 315         }
 316
 317         tv = g_new(extcap_token_param, 1);
 318         tv->arg = g_strndup(b, eq - b);
 319         tv->value = g_strndup(eq + 1, e - eq);
 320
 321         if (g_ascii_strcasecmp(tv->arg, "number") == 0) {
 322             tv->param_type = EXTCAP_PARAM_ARGNUM;
 323         } else if (g_ascii_strcasecmp(tv->arg, "call") == 0) {
 324             tv->param_type = EXTCAP_PARAM_CALL;
 325         } else if (g_ascii_strcasecmp(tv->arg, "display") == 0) {
 326             tv->param_type = EXTCAP_PARAM_DISPLAY;
 327         } else if (g_ascii_strcasecmp(tv->arg, "type") == 0) {
 328             tv->param_type = EXTCAP_PARAM_TYPE;
 329         } else if (g_ascii_strcasecmp(tv->arg, "arg") == 0) {
 330             tv->param_type = EXTCAP_PARAM_ARG;
 331         } else if (g_ascii_strcasecmp(tv->arg, "default") == 0) {
 332             tv->param_type = EXTCAP_PARAM_DEFAULT;
 333         } else if (g_ascii_strcasecmp(tv->arg, "value") == 0) {
 334             tv->param_type = EXTCAP_PARAM_VALUE;
 335         } else if (g_ascii_strcasecmp(tv->arg, "range") == 0) {
 336             tv->param_type = EXTCAP_PARAM_RANGE;
 337         } else if (g_ascii_strcasecmp(tv->arg, "tooltip") == 0) {
 338             tv->param_type = EXTCAP_PARAM_TOOLTIP;
 339         } else if (g_ascii_strcasecmp(tv->arg, "mustexist") == 0) {
 340             tv->param_type = EXTCAP_PARAM_FILE_MUSTEXIST;
 341         } else if (g_ascii_strcasecmp(tv->arg, "name") == 0) {
 342             tv->param_type = EXTCAP_PARAM_NAME;
 343         } else if (g_ascii_strcasecmp(tv->arg, "enabled") == 0) {
 344             tv->param_type = EXTCAP_PARAM_ENABLED;
 345         } else if (g_ascii_strcasecmp(tv->arg, "parent") == 0) {
 346             tv->param_type = EXTCAP_PARAM_PARENT;
 347         } else {
 348             tv->param_type = EXTCAP_PARAM_UNKNOWN;
 349         }
 350
 351         tv->next_token = rs->param_list;
 352         rs->param_list = tv;
 353
 354         /* printf("debug - tokenizer - got '%s' = '%s'\n", tv->arg, tv->value); */
 355
 356         b = e + 1;
 357         if ((size_t) (b - s) > strlen(s))
 358             break;
 359
 360         b = g_strstr_len(b, -1, "{");
 361     }
 362
 363     return rs;
 364 }
 365
 366 extcap_token_sentence *extcap_tokenize_sentences(const gchar *s) {
 367     extcap_token_sentence *first = NULL, *cur = NULL, *last = NULL;
 368
 369     gchar **list, **list_iter;
 370
 371     list_iter = list = g_strsplit(s, "\n", 0);
 372
 373     while (*list_iter != NULL ) {
 374         cur = extcap_tokenize_sentence(*list_iter);
 375
 376         if (cur != NULL) {
 377             if (first == NULL) {
 378                 first = cur;
 379                 last = cur;
 380             } else {
 381                 last->next_sentence = cur;
 382                 last = cur;
 383             }
 384         }
 385
 386         list_iter++;
 387     }
 388
 389     g_strfreev(list);
 390
 391     return first;
 392 }
 393
 394 extcap_token_param *extcap_find_param_by_type(extcap_token_param *first,
 395         extcap_param_type t) {
 396     while (first != NULL ) {
 397         if (first->param_type == t) {
 398             return first;
 399         }
 400
 401         first = first->next_token;
 402     }
 403
 404     return NULL ;
 405 }
 406
 407 void extcap_free_value(extcap_value *v) {
 408     if (v == NULL)
 409         return;
 410
 411     if (v->call != NULL)
 412         g_free(v->call);
 413
 414     if (v->display != NULL)
 415         g_free(v->display);
 416
 417     g_free(v);
 418 }
 419
 420 extcap_interface *extcap_new_interface(void) {
 421     extcap_interface *r = g_new(extcap_interface, 1);
 422
 423     r->call = r->display = NULL;
 424     r->next_interface = NULL;
 425
 426     return r;
 427 }
 428
 429 void extcap_free_interface(extcap_interface *i) {
 430     if (i == NULL)
 431         return;
 432
 433     if (i->call != NULL)
 434         g_free(i->call);
 435
 436     if (i->display != NULL)
 437         g_free(i->display);
 438 }
 439
 440 extcap_dlt *extcap_new_dlt(void) {
 441     extcap_dlt *r = g_new(extcap_dlt, 1);
 442
 443     r->number = -1;
 444     r->name = r->display = NULL;
 445     r->next_dlt = NULL;
 446
 447     return r;
 448 }
 449
 450 void extcap_free_dlt(extcap_dlt *d) {
 451     if (d == NULL)
 452         return;
 453
 454     if (d->name != NULL)
 455         g_free(d->name);
 456
 457     if (d->display != NULL)
 458         g_free(d->display);
 459 }
 460
 461 extcap_arg *extcap_new_arg(void) {
 462     extcap_arg *r = g_new(extcap_arg, 1);
 463
 464     r->call = NULL;
 465     r->display = NULL;
 466     r->tooltip = NULL;
 467     r->arg_type = EXTCAP_ARG_UNKNOWN;
 468     r->range_start = NULL;
 469     r->range_end = NULL;
 470     r->default_complex = NULL;
 471     r->fileexists = FALSE;
 472
 473     r->values = NULL;
 474     /*r->next_arg = NULL; */
 475
 476     return r;
 477 }
 478
 479 static void extcap_free_valuelist(gpointer data, gpointer user_data _U_) {
 480     extcap_free_value((extcap_value *) data);
 481 }
 482
 483 void extcap_free_arg(extcap_arg *a) {
 484
 485     if (a == NULL)
 486         return;
 487
 488     if (a->call != NULL)
 489         g_free(a->call);
 490
 491     if (a->display != NULL)
 492         g_free(a->display);
 493
 494     if (a->tooltip != NULL)
 495         g_free(a->tooltip);
 496
 497     if (a->range_start != NULL)
 498         extcap_free_complex(a->range_start);
 499
 500     if (a->range_end != NULL)
 501         extcap_free_complex(a->range_end);
 502
 503     if (a->default_complex != NULL)
 504         extcap_free_complex(a->default_complex);
 505
 506     g_list_foreach(a->values, (GFunc) extcap_free_valuelist, NULL);
 507 }
 508
 509 static void extcap_free_arg_list_cb(gpointer listentry, gpointer data _U_) {
 510     if (listentry != NULL)
 511         extcap_free_arg((extcap_arg *) listentry);
 512 }
 513
 514 void extcap_free_arg_list(GList *a) {
 515     g_list_foreach(a, extcap_free_arg_list_cb, NULL);
 516     g_list_free(a);
 517 }
 518
 519 static gint glist_find_numbered_arg(gconstpointer listelem, gconstpointer needle) {
 520     if (((const extcap_arg *) listelem)->arg_num == *((const int*) needle))
 521         return 0;
 522     return 1;
 523 }
 524
 525 extcap_arg *extcap_parse_arg_sentence(GList * args, extcap_token_sentence *s) {
 526     extcap_token_param *v = NULL;
 527     extcap_arg *target_arg = NULL;
 528     extcap_value *value = NULL;
 529     GList * entry = NULL;
 530     int tint;
 531     extcap_sentence_type sent = EXTCAP_SENTENCE_UNKNOWN;
 532
 533     if (s == NULL)
 534         return target_arg;
 535
 536     if (g_ascii_strcasecmp(s->sentence, "arg") == 0) {
 537         sent = EXTCAP_SENTENCE_ARG;
 538         /* printf("ARG sentence\n"); */
 539     } else if (g_ascii_strcasecmp(s->sentence, "value") == 0) {
 540         sent = EXTCAP_SENTENCE_VALUE;
 541         /* printf("VALUE sentence\n"); */
 542     }
 543
 544     if (sent == EXTCAP_SENTENCE_ARG) {
 545         target_arg = extcap_new_arg();
 546
 547         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_ARGNUM))
 548                 == NULL) {
 549             extcap_free_arg(target_arg);
 550             return NULL ;
 551         }
 552
 553         if (sscanf(v->value, "%d", &(target_arg->arg_num)) != 1) {
 554             extcap_free_arg(target_arg);
 555             return NULL ;
 556         }
 557
 558         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_CALL))
 559                 == NULL) {
 560             extcap_free_arg(target_arg);
 561             return NULL ;
 562         }
 563         target_arg->call = g_strdup(v->value);
 564
 565         /* No value only parameters allowed */
 566         if (strlen(target_arg->call) == 0) {
 567             extcap_free_arg(target_arg);
 568             return NULL ;
 569         }
 570
 571         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DISPLAY))
 572                 == NULL) {
 573             extcap_free_arg(target_arg);
 574             return NULL ;
 575         }
 576         target_arg->display = g_strdup(v->value);
 577
 578         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_TOOLTIP))
 579                 != NULL) {
 580             target_arg->tooltip = g_strdup(v->value);
 581         }
 582
 583         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_FILE_MUSTEXIST))
 584                 != NULL) {
 585             target_arg->fileexists = (v->value[0] == 't' || v->value[0] == 'T');
 586         }
 587
 588         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_TYPE))
 589                 == NULL) {
 590             /* printf("no type in ARG sentence\n"); */
 591             extcap_free_arg(target_arg);
 592             return NULL ;
 593         }
 594
 595         if (g_ascii_strcasecmp(v->value, "integer") == 0) {
 596             target_arg->arg_type = EXTCAP_ARG_INTEGER;
 597         } else if (g_ascii_strcasecmp(v->value, "unsigned") == 0) {
 598             target_arg->arg_type = EXTCAP_ARG_UNSIGNED;
 599         } else if (g_ascii_strcasecmp(v->value, "long") == 0) {
 600             target_arg->arg_type = EXTCAP_ARG_LONG;
 601         } else if (g_ascii_strcasecmp(v->value, "double") == 0) {
 602             target_arg->arg_type = EXTCAP_ARG_DOUBLE;
 603         } else if (g_ascii_strcasecmp(v->value, "boolean") == 0) {
 604             target_arg->arg_type = EXTCAP_ARG_BOOLEAN;
 605         } else if (g_ascii_strcasecmp(v->value, "boolflag") == 0) {
 606             target_arg->arg_type = EXTCAP_ARG_BOOLFLAG;
 607         } else if (g_ascii_strcasecmp(v->value, "menu") == 0) {
 608             target_arg->arg_type = EXTCAP_ARG_MENU;
 609         } else if (g_ascii_strcasecmp(v->value, "selector") == 0) {
 610             target_arg->arg_type = EXTCAP_ARG_SELECTOR;
 611         } else if (g_ascii_strcasecmp(v->value, "radio") == 0) {
 612             target_arg->arg_type = EXTCAP_ARG_RADIO;
 613         } else if (g_ascii_strcasecmp(v->value, "string") == 0) {
 614             target_arg->arg_type = EXTCAP_ARG_STRING;
 615         } else if (g_ascii_strcasecmp(v->value, "fileselect") == 0) {
 616             target_arg->arg_type = EXTCAP_ARG_FILESELECT;
 617         } else if (g_ascii_strcasecmp(v->value, "multicheck") == 0) {
 618             target_arg->arg_type = EXTCAP_ARG_MULTICHECK;
 619         } else {
 620             printf("invalid type %s in ARG sentence\n", v->value);
 621             extcap_free_arg(target_arg);
 622             return NULL ;
 623         }
 624
 625         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_RANGE))
 626                 != NULL) {
 627             gchar *cp = g_strstr_len(v->value, -1, ",");
 628
 629             if (cp == NULL) {
 630                 printf("invalid range, expected value,value got %s\n",
 631                         v->value);
 632                 extcap_free_arg(target_arg);
 633                 return NULL ;
 634             }
 635
 636             if ((target_arg->range_start = extcap_parse_complex(
 637                     target_arg->arg_type, v->value)) == NULL) {
 638                 printf("invalid range, expected value,value got %s\n",
 639                         v->value);
 640                 extcap_free_arg(target_arg);
 641                 return NULL ;
 642             }
 643
 644             if ((target_arg->range_end = extcap_parse_complex(
 645                     target_arg->arg_type, cp + 1)) == NULL) {
 646                 printf("invalid range, expected value,value got %s\n",
 647                         v->value);
 648                 extcap_free_arg(target_arg);
 649                 return NULL ;
 650             }
 651         }
 652
 653         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DEFAULT))
 654                 != NULL) {
 655             if ((target_arg->default_complex = extcap_parse_complex(
 656                     target_arg->arg_type, v->value)) == NULL) {
 657                 printf("invalid default, couldn't parse %s\n", v->value);
 658             }
 659         }
 660
 661     } else if (sent == EXTCAP_SENTENCE_VALUE) {
 662         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_ARG))
 663                 == NULL) {
 664             printf("no arg in VALUE sentence\n");
 665             return NULL ;
 666         }
 667
 668         if (sscanf(v->value, "%d", &tint) != 1) {
 669             printf("invalid arg in VALUE sentence\n");
 670             return NULL ;
 671         }
 672
 673         ;
 674         if ((entry = g_list_find_custom(args, &tint, glist_find_numbered_arg))
 675                 == NULL) {
 676             printf("couldn't find arg %d in list for VALUE sentence\n", tint);
 677             return NULL ;
 678         }
 679
 680         value = g_new(extcap_value, 1);
 681         value->display = NULL;
 682         value->call = NULL;
 683         value->enabled = FALSE;
 684         value->is_default = FALSE;
 685         value->arg_num = tint;
 686         value->parent = NULL;
 687
 688         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_VALUE))
 689                 == NULL) {
 690             /* printf("no value in VALUE sentence\n"); */
 691             extcap_free_value(value);
 692             return NULL ;
 693         }
 694         value->call = g_strdup(v->value);
 695
 696         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DISPLAY))
 697                 == NULL) {
 698             /* printf("no display in VALUE sentence\n"); */
 699             extcap_free_value(value);
 700             return NULL ;
 701         }
 702         value->display = g_strdup(v->value);
 703
 704         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_PARENT))
 705                 != NULL) {
 706             value->parent = g_strdup(v->value);
 707         }
 708
 709         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DEFAULT))
 710                 != NULL) {
 711             /* printf("found default value\n"); */
 712             value->is_default = (v->value[0] == 't' || v->value[0] == 'T');
 713         }
 714
 715         if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_ENABLED))
 716                 != NULL) {
 717             value->enabled = (v->value[0] == 't' || v->value[0] == 'T');
 718         }
 719
 720         ((extcap_arg*) entry->data)->values = g_list_append(
 721                 ((extcap_arg*) entry->data)->values, value);
 722
 723         return NULL ;
 724     }
 725
 726     return target_arg;
 727 }
 728
 729 GList * extcap_parse_args(extcap_token_sentence *first_s) {
 730     GList * args = NULL;
 731
 732     while (first_s) {
 733         extcap_arg *ra = NULL;
 734
 735         if ((ra = extcap_parse_arg_sentence(args, first_s)) != NULL)
 736             args = g_list_append(args, (gpointer) ra);
 737
 738         first_s = first_s->next_sentence;
 739     }
 740
 741     return args;
 742 }
 743
 744 int extcap_parse_interface_sentence(extcap_token_sentence *s,
 745         extcap_interface **ri) {
 746     extcap_token_param *v = NULL;
 747     extcap_sentence_type sent = EXTCAP_SENTENCE_UNKNOWN;
 748
 749     *ri = NULL;
 750
 751     if (s == NULL)
 752         return -1;
 753
 754     if (g_ascii_strcasecmp(s->sentence, "interface") == 0) {
 755         sent = EXTCAP_SENTENCE_INTERFACE;
 756         /* printf("INTERFACE sentence\n"); */
 757     }
 758
 759     if (sent == EXTCAP_SENTENCE_UNKNOWN)
 760         return -1;
 761
 762     *ri = extcap_new_interface();
 763
 764     if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_VALUE))
 765             == NULL) {
 766         printf("No value in INTERFACE sentence\n");
 767         extcap_free_interface(*ri);
 768         return -1;
 769     }
 770     (*ri)->call = g_strdup(v->value);
 771
 772     if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DISPLAY))
 773             == NULL) {
 774         printf("No display in INTERFACE sentence\n");
 775         extcap_free_interface(*ri);
 776         return -1;
 777     }
 778     (*ri)->display = g_strdup(v->value);
 779
 780     return 1;
 781 }
 782
 783 int extcap_parse_interfaces(extcap_token_sentence *first_s,
 784         extcap_interface **first_int) {
 785     extcap_interface *first_i = NULL, *last_i = NULL;
 786
 787     while (first_s) {
 788         extcap_interface *ri;
 789
 790         if (extcap_parse_interface_sentence(first_s, &ri) >= 0 && ri != NULL) {
 791             if (first_i == NULL) {
 792                 first_i = last_i = ri;
 793             } else {
 794                 last_i->next_interface = ri;
 795                 last_i = ri;
 796             }
 797         }
 798
 799         first_s = first_s->next_sentence;
 800     }
 801
 802     *first_int = first_i;
 803
 804     return 1;
 805 }
 806
 807 int extcap_parse_dlt_sentence(extcap_token_sentence *s, extcap_dlt **rd) {
 808     extcap_token_param *v = NULL;
 809     extcap_sentence_type sent = EXTCAP_SENTENCE_UNKNOWN;
 810
 811     *rd = NULL;
 812
 813     if (s == NULL)
 814         return -1;
 815
 816     if (g_ascii_strcasecmp(s->sentence, "dlt") == 0) {
 817         sent = EXTCAP_SENTENCE_DLT;
 818     }
 819
 820     if (sent == EXTCAP_SENTENCE_UNKNOWN)
 821         return -1;
 822
 823     *rd = extcap_new_dlt();
 824
 825     if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_ARGNUM))
 826             == NULL) {
 827         printf("No number in DLT sentence\n");
 828         extcap_free_dlt(*rd);
 829         return -1;
 830     }
 831     if (sscanf(v->value, "%d", &((*rd)->number)) != 1) {
 832         printf("Invalid number in DLT sentence\n");
 833         extcap_free_dlt(*rd);
 834         return -1;
 835     }
 836
 837     if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_NAME))
 838             == NULL) {
 839         printf("No name in DLT sentence\n");
 840         extcap_free_dlt(*rd);
 841         return -1;
 842     }
 843     (*rd)->name = g_strdup(v->value);
 844
 845     if ((v = extcap_find_param_by_type(s->param_list, EXTCAP_PARAM_DISPLAY))
 846             == NULL) {
 847         printf("No display in DLT sentence\n");
 848         extcap_free_dlt(*rd);
 849         return -1;
 850     }
 851     (*rd)->display = g_strdup(v->value);
 852
 853     return 1;
 854 }
 855
 856 int extcap_parse_dlts(extcap_token_sentence *first_s, extcap_dlt **first_dlt) {
 857     extcap_dlt *first_d = NULL, *last_d = NULL;
 858
 859     while (first_s) {
 860         extcap_dlt *rd;
 861
 862         if (extcap_parse_dlt_sentence(first_s, &rd) >= 0 && rd != NULL) {
 863             if (first_d == NULL) {
 864                 first_d = last_d = rd;
 865             } else {
 866                 last_d->next_dlt = rd;
 867                 last_d = rd;
 868             }
 869         }
 870
 871         first_s = first_s->next_sentence;
 872     }
 873
 874     *first_dlt = first_d;
 875
 876     return 1;
 877 }
 878
 879 /*
 880  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 881  *
 882  * Local variables:
 883  * c-basic-offset: 4
 884  * tab-width: 8
 885  * indent-tabs-mode: nil
 886  * End:
 887  *
 888  * vi: set shiftwidth=4 tabstop=8 expandtab:
 889  * :indentSize=4:tabSize=8:noTabs=true:
 890  */