/* $XConsortium: AuGetBest.c /main/23 1996/12/04 11:04:55 lehors $ */ /* Copyright (c) 1988 X Consortium Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the X Consortium shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the X Consortium. */ #include #include #ifdef XTHREADS #include #endif #ifdef hpux #define X_INCLUDE_NETDB_H #define XOS_USE_NO_LOCKING #include #endif static binaryEqual (a, b, len) register char *a, *b; register int len; { while (len--) if (*a++ != *b++) return 0; return 1; } #if NeedFunctionPrototypes Xauth * XauGetBestAuthByAddr ( #if NeedWidePrototypes unsigned int family, unsigned int address_length, #else unsigned short family, unsigned short address_length, #endif _Xconst char* address, #if NeedWidePrototypes unsigned int number_length, #else unsigned short number_length, #endif _Xconst char* number, int types_length, char** types, _Xconst int* type_lengths) #else Xauth * XauGetBestAuthByAddr (family, address_length, address, number_length, number, types_length, types, type_lengths) unsigned short family; unsigned short address_length; char *address; unsigned short number_length; char *number; int types_length; char **types; int *type_lengths; #endif { FILE *auth_file; char *auth_name; Xauth *entry; Xauth *best; int best_type; int type; #ifdef hpux char *fully_qual_address; unsigned short fully_qual_address_length; #endif auth_name = XauFileName (); if (!auth_name) return 0; if (access (auth_name, R_OK) != 0) /* checks REAL id */ return 0; auth_file = fopen (auth_name, "rb"); if (!auth_file) return 0; #ifdef hpux if (family == FamilyLocal) { _Xgethostbynameparams hparams; struct hostent *hostp; /* make sure we try fully-qualified hostname */ if ((hostp = _XGethostbyname(address,hparams)) != NULL) { fully_qual_address = hostp->h_name; fully_qual_address_length = strlen(fully_qual_address); } else { fully_qual_address = NULL; fully_qual_address_length = 0; } } #endif /* hpux */ best = 0; best_type = types_length; for (;;) { entry = XauReadAuth (auth_file); if (!entry) break; /* * Match when: * either family or entry->family are FamilyWild or * family and entry->family are the same * and * either address or entry->address are empty or * address and entry->address are the same * and * either number or entry->number are empty or * number and entry->number are the same * and * name matches one of the specified names, or no names * were specified */ if ((family == FamilyWild || entry->family == FamilyWild || (entry->family == family && ((address_length == entry->address_length && binaryEqual (entry->address, address, (int)address_length)) #ifdef hpux || (family == FamilyLocal && fully_qual_address_length == entry->address_length && binaryEqual (entry->address, fully_qual_address, (int) fully_qual_address_length)) #endif ))) && (number_length == 0 || entry->number_length == 0 || (number_length == entry->number_length && binaryEqual (entry->number, number, (int)number_length)))) { if (best_type == 0) { best = entry; break; } for (type = 0; type < best_type; type++) if (type_lengths[type] == entry->name_length && !(strncmp (types[type], entry->name, entry->name_length))) { break; } if (type < best_type) { if (best) XauDisposeAuth (best); best = entry; best_type = type; if (type == 0) break; continue; } } XauDisposeAuth (entry); } (void) fclose (auth_file); return best; }