stats.c

   1 /*
   2  * stats.c - various routines to do stats on the key graph
   3  *
   4  * Copyright 2000-2004,2007-2009 Jonathan McDowell <noodles@earth.li>
   5  *
   6  * This program is free software: you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 #include "cleanup.h"
  24 #include "getcgi.h"
  25 #include "hash.h"
  26 #include "keydb.h"
  27 #include "ll.h"
  28 #include "onak-conf.h"
  29 #include "stats.h"
  30
  31 /**
  32  *      initcolour - Clear the key graph ready for use.
  33  *      @parent: Do we want to clear the parent pointers too?
  34  *
  35  *      Clears the parent and colour information on all elements in the key
  36  *      graph.
  37  */
  38 void initcolour(bool parent)
  39 {
  40         unsigned int loop;
  41         struct ll *curkey;
  42
  43         /*
  44          * Init the colour/parent values. We get each entry list from the hash
  45          * table and walk along it, zeroing the values.
  46          */
  47         for (loop = 0; loop < HASHSIZE; loop++) {
  48                 curkey = gethashtableentry(loop);
  49                 while (curkey != NULL) {
  50                         ((struct stats_key *)curkey->object)->colour = 0;
  51                         if (parent) {
  52                                 ((struct stats_key *)curkey->object)->parent =
  53                                         0;
  54                         }
  55                         curkey = curkey->next;
  56                 }
  57         }
  58 }
  59
  60 /**
  61  *      findpath - Given 2 keys finds a path between them.
  62  *      @have: The key we have.
  63  *      @want: The key we want to get to.
  64  *
  65  *      This does a breadth first search on the key tree, starting with the
  66  *      key we have. It returns as soon as a path is found or when we run out
  67  *      of keys; whichever comes sooner.
  68  */
  69 unsigned long findpath(struct stats_key *have, struct stats_key *want)
  70 {
  71         struct ll *keys = NULL;
  72         struct ll *oldkeys = NULL;
  73         struct ll *sigs = NULL;
  74         struct ll *nextkeys = NULL;
  75         long curdegree = 0;
  76         unsigned long count = 0;
  77
  78         curdegree = 1;
  79         keys = lladd(NULL, want);
  80         oldkeys = keys;
  81
  82         while ((!cleanup()) && keys != NULL && have->colour == 0) {
  83                 sigs = config.dbbackend->cached_getkeysigs(((struct stats_key *)
  84                                         keys->object)->keyid);
  85                 while ((!cleanup()) && sigs != NULL && have->colour == 0) {
  86                         /*
  87                          * Check if we've seen this key before and if not mark
  88                          * it and add its sigs to the list we want to look at.
  89                          */
  90                         if (!((struct stats_key *)sigs->object)->disabled &&
  91                             !((struct stats_key *)sigs->object)->revoked &&
  92                             ((struct stats_key *)sigs->object)->colour == 0) {
  93                                 count++;
  94                                 ((struct stats_key *)sigs->object)->colour =
  95                                         curdegree;
  96                                 ((struct stats_key *)sigs->object)->parent =
  97                                         ((struct stats_key *)
  98                                          keys->object)->keyid;
  99                                 nextkeys = lladd(nextkeys, sigs->object);
 100                         }
 101                         sigs = sigs->next;
 102                 }
 103                 keys = keys->next;
 104                 if (keys == NULL) {
 105                         keys = nextkeys;
 106                         llfree(oldkeys, NULL);
 107                         oldkeys = keys;
 108                         nextkeys = NULL;
 109                         curdegree++;
 110                 }
 111         }
 112         if (oldkeys != NULL) {
 113                 llfree(oldkeys, NULL);
 114                 oldkeys = NULL;
 115         }
 116         if (nextkeys != NULL) {
 117                 llfree(nextkeys, NULL);
 118                 nextkeys = NULL;
 119         }
 120
 121         return count;
 122 }
 123
 124 /**
 125  *      dofindpath - Given 2 keys displays a path between them.
 126  *      @have: The key we have.
 127  *      @want: The key we want to get to.
 128  *      @html: Should we output in html.
 129  *      @count: How many paths we should look for.
 130  *
 131  *      This does a breadth first search on the key tree, starting with the
 132  *      key we have. It returns as soon as a path is found or when we run out
 133  *      of keys; whichever comes sooner.
 134  */
 135 void dofindpath(uint64_t have, uint64_t want, bool html, int count)
 136 {
 137         struct stats_key *keyinfoa, *keyinfob, *curkey;
 138         uint64_t fullhave, fullwant;
 139         int rec;
 140         int pathnum;
 141         char *uid;
 142
 143         fullhave = config.dbbackend->getfullkeyid(have);
 144         fullwant = config.dbbackend->getfullkeyid(want);
 145
 146         /*
 147          * Make sure the keys we have and want are in the cache.
 148          */
 149         (void) config.dbbackend->cached_getkeysigs(fullhave);
 150         (void) config.dbbackend->cached_getkeysigs(fullwant);
 151
 152         if ((keyinfoa = findinhash(fullhave)) == NULL) {
 153                 printf("Couldn't find key 0x%016" PRIX64 ".\n", have);
 154                 return;
 155         }
 156         if ((keyinfob = findinhash(fullwant)) == NULL) {
 157                 printf("Couldn't find key 0x%016" PRIX64 ".\n", want);
 158                 return;
 159         }
 160
 161         pathnum = 0;
 162
 163         while ((!cleanup()) && (pathnum < count)) {
 164                 /*
 165                  * Fill the tree info up.
 166                  */
 167                 initcolour(true);
 168                 rec = findpath(keyinfoa, keyinfob);
 169                 keyinfob->parent = 0;
 170
 171                 printf("%s%d nodes examined. %ld elements in the hash%s\n",
 172                         html ? "<HR>" : "",
 173                         rec,
 174                         hashelements(),
 175                         html ? "<BR>" : "");
 176                 if (keyinfoa->colour == 0) {
 177                         if (pathnum == 0) {
 178                                 printf("Can't find a link from 0x%08" PRIX64
 179                                 " to 0x%08" PRIX64 "%s\n",
 180                                 have,
 181                                 want,
 182                                 html ? "<BR>" : "");
 183                         } else {
 184                                 printf("Can't find any further paths%s\n",
 185                                         html ? "<BR>" : "");
 186                         }
 187                         pathnum = count;
 188                 } else {
 189                         printf("%d steps from 0x%08" PRIX64 " to 0x%08" PRIX64
 190                                 "%s\n",
 191                                 keyinfoa->colour, have & 0xFFFFFFFF,
 192                                 want & 0xFFFFFFFF,
 193                                 html ? "<BR>" : "");
 194                         curkey = keyinfoa;
 195                         while (curkey != NULL && curkey->keyid != 0) {
 196                                 uid = config.dbbackend->keyid2uid(
 197                                                 curkey->keyid);
 198                                 if (html && uid == NULL) {
 199                                         printf("<a href=\"lookup?op=get&search="
 200                                                 "0x%08" PRIX64 "\">0x%08" PRIX64
 201                                                 "</a> (["
 202                                                 "User id not found])%s<BR>\n",
 203                                                 curkey->keyid & 0xFFFFFFFF,
 204                                                 curkey->keyid & 0xFFFFFFFF,
 205                                                 (curkey->keyid == fullwant) ?
 206                                                         "" : " signs");
 207                                 } else if (html && uid != NULL) {
 208                                         printf("<a href=\"lookup?op=get&search="
 209                                                 "0x%08" PRIX64 "\">0x%08"
 210                                                 PRIX64 "</a>"
 211                                                 " (<a href=\"lookup?op=vindex&"
 212                                                 "search=0x%08" PRIX64
 213                                                 "\">%s</a>)%s"
 214                                                 "<BR>\n",
 215                                                 curkey->keyid & 0xFFFFFFFF,
 216                                                 curkey->keyid & 0xFFFFFFFF,
 217                                                 curkey->keyid & 0xFFFFFFFF,
 218                                                 txt2html(uid),
 219                                                 (curkey->keyid == fullwant) ?
 220                                                 "" : " signs");
 221                                 } else {
 222                                         printf("0x%08" PRIX64 " (%s)%s\n",
 223                                                 curkey->keyid & 0xFFFFFFFF,
 224                                                 (uid == NULL) ?
 225                                                         "[User id not found]" :
 226                                                         uid,
 227                                                 (curkey->keyid == fullwant) ?
 228                                                 "" : " signs");
 229                                 }
 230                                 if (uid != NULL) {
 231                                         free(uid);
 232                                         uid = NULL;
 233                                 }
 234                                 if (curkey != keyinfoa && curkey != keyinfob) {
 235                                         curkey->disabled = true;
 236                                 }
 237                                 curkey = findinhash(curkey->parent);
 238                         }
 239                         if (html) {
 240                                 puts("<P>List of key ids in path:</P>");
 241                         } else {
 242                                 puts("List of key ids in path:");
 243                         }
 244                         curkey = keyinfoa;
 245                         while (curkey != NULL && curkey->keyid != 0) {
 246                                 printf("0x%08" PRIX64 " ",
 247                                                 curkey->keyid & 0xFFFFFFFF);
 248                                 curkey = findinhash(curkey->parent);
 249                         }
 250                         putchar('\n');
 251                 }
 252                 pathnum++;
 253         }
 254 }
 255
 256
 257
 258 struct stats_key *furthestkey(struct stats_key *have)
 259 {
 260         unsigned long count = 0;
 261         unsigned long curdegree = 0;
 262         struct ll *curll, *nextll, *tmp;
 263         struct ll *sigs = NULL;
 264         struct stats_key *max;
 265
 266         if (have == NULL) {
 267                 return NULL;
 268         }
 269
 270         ++curdegree;
 271
 272         nextll = NULL;
 273         max = have;
 274         curll = lladd(NULL, have);
 275
 276         while (curll != NULL) {
 277                 sigs = config.dbbackend->cached_getkeysigs(((struct stats_key *)
 278                                 curll->object)->keyid);
 279                 while (sigs != NULL) {
 280                         if (((struct stats_key *) sigs->object)->colour == 0) {
 281                                 /*
 282                                  * We've never seen it. Count it, mark it and
 283                                  * explore its subtree.
 284                                  */
 285                                 count++;
 286                                 max = (struct stats_key *)sigs->object;
 287                                 ((struct stats_key *)sigs->object)->colour =
 288                                         curdegree;
 289                                 ((struct stats_key *)sigs->object)->parent =
 290                                         ((struct stats_key *)
 291                                          curll->object)->keyid;
 292
 293                                 nextll=lladd(nextll, sigs->object);
 294                         }
 295                         sigs=sigs->next;
 296                 }
 297                 tmp = curll->next;
 298                 free(curll);
 299                 curll = tmp;
 300                 if (curll == NULL) {
 301                         curll = nextll;
 302                         nextll = NULL;
 303                         ++curdegree;
 304                 };
 305         }
 306
 307         return max;
 308 }