src/as.c

   1 /*
   2         libloc - A library to determine the location of someone on the Internet
   3
   4         Copyright (C) 2017 IPFire Development Team <info@ipfire.org>
   5
   6         This library is free software; you can redistribute it and/or
   7         modify it under the terms of the GNU Lesser General Public
   8         License as published by the Free Software Foundation; either
   9         version 2.1 of the License, or (at your option) any later version.
  10
  11         This library is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14         Lesser General Public License for more details.
  15 */
  16
  17 #include <ctype.h>
  18 #include <errno.h>
  19 #include <stdint.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #ifdef HAVE_ENDIAN_H
  24 #  include <endian.h>
  25 #endif
  26
  27 #include <loc/libloc.h>
  28 #include <loc/as.h>
  29 #include <loc/compat.h>
  30 #include <loc/format.h>
  31 #include <loc/private.h>
  32 #include <loc/stringpool.h>
  33
  34 struct loc_as {
  35         struct loc_ctx* ctx;
  36         int refcount;
  37
  38         uint32_t number;
  39         char* name;
  40 };
  41
  42 LOC_EXPORT int loc_as_new(struct loc_ctx* ctx, struct loc_as** as, uint32_t number) {
  43         struct loc_as* a = calloc(1, sizeof(*a));
  44         if (!a)
  45                 return -ENOMEM;
  46
  47         a->ctx = loc_ref(ctx);
  48         a->refcount = 1;
  49
  50         a->number = number;
  51         a->name = NULL;
  52
  53         DEBUG(a->ctx, "AS%u allocated at %p\n", a->number, a);
  54         *as = a;
  55
  56         return 0;
  57 }
  58
  59 LOC_EXPORT struct loc_as* loc_as_ref(struct loc_as* as) {
  60         as->refcount++;
  61
  62         return as;
  63 }
  64
  65 static void loc_as_free(struct loc_as* as) {
  66         DEBUG(as->ctx, "Releasing AS%u %p\n", as->number, as);
  67
  68         if (as->name)
  69                 free(as->name);
  70
  71         loc_unref(as->ctx);
  72         free(as);
  73 }
  74
  75 LOC_EXPORT struct loc_as* loc_as_unref(struct loc_as* as) {
  76         if (--as->refcount > 0)
  77                 return NULL;
  78
  79         loc_as_free(as);
  80
  81         return NULL;
  82 }
  83
  84 LOC_EXPORT uint32_t loc_as_get_number(struct loc_as* as) {
  85         return as->number;
  86 }
  87
  88 LOC_EXPORT const char* loc_as_get_name(struct loc_as* as) {
  89         return as->name;
  90 }
  91
  92 LOC_EXPORT int loc_as_set_name(struct loc_as* as, const char* name) {
  93         as->name = strdup(name);
  94
  95         return 0;
  96 }
  97
  98 LOC_EXPORT int loc_as_cmp(struct loc_as* as1, struct loc_as* as2) {
  99         if (as1->number > as2->number)
 100                 return 1;
 101
 102         if (as1->number < as2->number)
 103                 return -1;
 104
 105         return 0;
 106 }
 107
 108 int loc_as_new_from_database_v1(struct loc_ctx* ctx, struct loc_stringpool* pool,
 109                 struct loc_as** as, const struct loc_database_as_v1* dbobj) {
 110         uint32_t number = be32toh(dbobj->number);
 111
 112         int r = loc_as_new(ctx, as, number);
 113         if (r)
 114                 return r;
 115
 116         const char* name = loc_stringpool_get(pool, be32toh(dbobj->name));
 117         r = loc_as_set_name(*as, name);
 118         if (r) {
 119                 loc_as_unref(*as);
 120                 return r;
 121         }
 122
 123         return 0;
 124 }
 125
 126 int loc_as_to_database_v1(struct loc_as* as, struct loc_stringpool* pool,
 127                 struct loc_database_as_v1* dbobj) {
 128         dbobj->number = htobe32(as->number);
 129
 130         // Save the name string in the string pool
 131         off_t name = loc_stringpool_add(pool, as->name ? as->name : "");
 132         dbobj->name = htobe32(name);
 133
 134         return 0;
 135 }
 136
 137 int loc_as_match_string(struct loc_as* as, const char* string) {
 138         // Match all AS when no search string is set
 139         if (!string)
 140                 return 1;
 141
 142         // Search if string is in name
 143         if (strcasestr(as->name, string) != NULL)
 144                 return 1;
 145
 146         return 0;
 147 }