stats.c

   1 /*
   2  * stats.c - various routines to do stats on the key graph
   3  *
   4  * Jonathan McDowell <noodles@earth.li>
   5  *
   6  * Copyright 2000-2002 Project Purple
   7  *
   8  * $Id: stats.c,v 1.12 2003/06/08 21:11:01 noodles Exp $
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13
  14 #include "getcgi.h"
  15 #include "hash.h"
  16 #include "keydb.h"
  17 #include "ll.h"
  18 #include "stats.h"
  19
  20 /**
  21  *      initcolour - Clear the key graph ready for use.
  22  *      @parent: Do we want to clear the parent pointers too?
  23  *
  24  *      Clears the parent and colour information on all elements in the key
  25  *      graph.
  26  */
  27 void initcolour(bool parent)
  28 {
  29         unsigned long loop;
  30         struct ll *curkey;
  31
  32         /*
  33          * Init the colour/parent values. We get each entry list from the hash
  34          * table and walk along it, zeroing the values.
  35          */
  36         for (loop = 0; loop < HASHSIZE; loop++) {
  37                 curkey = gethashtableentry(loop);
  38                 while (curkey != NULL) {
  39                         ((struct stats_key *)curkey->object)->colour = 0;
  40                         if (parent) {
  41                                 ((struct stats_key *)curkey->object)->parent =
  42                                         0;
  43                         }
  44                         curkey = curkey->next;
  45                 }
  46         }
  47 }
  48
  49 /**
  50  *      findpath - Given 2 keys finds a path between them.
  51  *      @have: The key we have.
  52  *      @want: The key we want to get to.
  53  *
  54  *      This does a breadth first search on the key tree, starting with the
  55  *      key we have. It returns as soon as a path is found or when we run out
  56  *      of keys; whichever comes sooner.
  57  */
  58 unsigned long findpath(struct stats_key *have, struct stats_key *want)
  59 {
  60         struct ll *keys = NULL;
  61         struct ll *oldkeys = NULL;
  62         struct ll *sigs = NULL;
  63         struct ll *nextkeys = NULL;
  64         long curdegree = 0;
  65         long count = 0;
  66
  67         curdegree = 1;
  68         keys = lladd(NULL, want);
  69         oldkeys = keys;
  70
  71         while (keys != NULL && have->colour == 0) {
  72                 sigs = cached_getkeysigs(((struct stats_key *)
  73                                         keys->object)->keyid);
  74                 while (sigs != NULL && have->colour == 0) {
  75                         /*
  76                          * Check if we've seen this key before and if not mark
  77                          * it and add its sigs to the list we want to look at.
  78                          */
  79                         if (!((struct stats_key *)sigs->object)->disabled &&
  80                             !((struct stats_key *)sigs->object)->revoked &&
  81                             ((struct stats_key *)sigs->object)->colour == 0) {
  82                                 count++;
  83                                 ((struct stats_key *)sigs->object)->colour =
  84                                         curdegree;
  85                                 ((struct stats_key *)sigs->object)->parent =
  86                                         ((struct stats_key *)
  87                                          keys->object)->keyid;
  88                                 nextkeys = lladd(nextkeys, sigs->object);
  89                         }
  90                         sigs = sigs->next;
  91                 }
  92                 keys = keys->next;
  93                 if (keys == NULL) {
  94                         keys = nextkeys;
  95                         llfree(oldkeys, NULL);
  96                         oldkeys = keys;
  97                         nextkeys = NULL;
  98                         curdegree++;
  99                 }
 100         }
 101         if (oldkeys != NULL) {
 102                 llfree(oldkeys, NULL);
 103                 oldkeys = NULL;
 104         }
 105         if (nextkeys != NULL) {
 106                 llfree(nextkeys, NULL);
 107                 nextkeys = NULL;
 108         }
 109
 110         return count;
 111 }
 112
 113 /**
 114  *      dofindpath - Given 2 keys displays a path between them.
 115  *      @have: The key we have.
 116  *      @want: The key we want to get to.
 117  *      @html: Should we output in html.
 118  *      @count: How many paths we should look for.
 119  *
 120  *      This does a breadth first search on the key tree, starting with the
 121  *      key we have. It returns as soon as a path is found or when we run out
 122  *      of keys; whichever comes sooner.
 123  */
 124 void dofindpath(uint64_t have, uint64_t want, bool html, int count)
 125 {
 126         struct stats_key *keyinfoa, *keyinfob, *curkey;
 127         uint64_t fullhave, fullwant;
 128         int rec;
 129         int pathnum;
 130         char *uid;
 131
 132         fullhave = getfullkeyid(have);
 133         fullwant = getfullkeyid(want);
 134
 135         /*
 136          * Make sure the keys we have and want are in the cache.
 137          */
 138         cached_getkeysigs(fullhave);
 139         cached_getkeysigs(fullwant);
 140
 141         if ((keyinfoa = findinhash(fullhave)) == NULL) {
 142                 printf("Couldn't find key 0x%llX.\n", have);
 143                 return;
 144         }
 145         if ((keyinfob = findinhash(fullwant)) == NULL) {
 146                 printf("Couldn't find key 0x%llX.\n", want);
 147                 return;
 148         }
 149
 150         pathnum = 0;
 151
 152         while (pathnum < count) {
 153                 /*
 154                  * Fill the tree info up.
 155                  */
 156                 initcolour(true);
 157                 rec = findpath(keyinfoa, keyinfob);
 158                 keyinfob->parent = 0;
 159
 160                 printf("%s%d nodes examined. %ld elements in the hash%s\n",
 161                         html ? "<HR>" : "",
 162                         rec,
 163                         hashelements(),
 164                         html ? "<BR>" : "");
 165                 if (keyinfoa->colour == 0) {
 166                         if (pathnum == 0) {
 167                                 printf("Can't find a link from 0x%08llX to "
 168                                 "0x%08llX%s\n",
 169                                 have,
 170                                 want,
 171                                 html ? "<BR>" : "");
 172                         } else {
 173                                 printf("Can't find any further paths%s\n",
 174                                         html ? "<BR>" : "");
 175                         }
 176                         pathnum = count;
 177                 } else {
 178                         printf("%d steps from 0x%08llX to 0x%08llX%s\n",
 179                                 keyinfoa->colour, have & 0xFFFFFFFF,
 180                                 want & 0xFFFFFFFF,
 181                                 html ? "<BR>" : "");
 182                         curkey = keyinfoa;
 183                         while (curkey != NULL && curkey->keyid != 0) {
 184                                 uid = keyid2uid(curkey->keyid);
 185                                 if (html && uid == NULL) {
 186                                         printf("<a href=\"lookup?op=get&search="
 187                                                 "0x%08llX\">0x%08llX</a> (["
 188                                                 "User id not found])%s<BR>\n",
 189                                                 curkey->keyid & 0xFFFFFFFF,
 190                                                 curkey->keyid & 0xFFFFFFFF,
 191                                                 (curkey->keyid == fullwant) ?
 192                                                         "" : " signs");
 193                                 } else if (html && uid != NULL) {
 194                                         printf("<a href=\"lookup?op=get&search="
 195                                                 "0x%08llX\">0x%08llX</a>"
 196                                                 " (<a href=\"lookup?op=vindex&"
 197                                                 "search=0x%08llX\">%s</a>)%s"
 198                                                 "<BR>\n",
 199                                                 curkey->keyid & 0xFFFFFFFF,
 200                                                 curkey->keyid & 0xFFFFFFFF,
 201                                                 curkey->keyid & 0xFFFFFFFF,
 202                                                 txt2html(uid),
 203                                                 (curkey->keyid == fullwant) ?
 204                                                 "" : " signs");
 205                                 } else {
 206                                         printf("0x%08llX (%s)%s\n",
 207                                                 curkey->keyid & 0xFFFFFFFF,
 208                                                 (uid == NULL) ?
 209                                                         "[User id not found]" :
 210                                                         uid,
 211                                                 (curkey->keyid == fullwant) ?
 212                                                 "" : " signs");
 213                                 }
 214                                 if (uid != NULL) {
 215                                         free(uid);
 216                                         uid = NULL;
 217                                 }
 218                                 if (curkey != keyinfoa && curkey != keyinfob) {
 219                                         curkey->disabled = true;
 220                                 }
 221                                 curkey = findinhash(curkey->parent);
 222                         }
 223                         if (html) {
 224                                 puts("<P>List of key ids in path:</P>");
 225                         } else {
 226                                 puts("List of key ids in path:");
 227                         }
 228                         curkey = keyinfoa;
 229                         while (curkey != NULL && curkey->keyid != 0) {
 230                                 printf("0x%08llX ", curkey->keyid & 0xFFFFFFFF);
 231                                 curkey = findinhash(curkey->parent);
 232                         }
 233                         putchar('\n');
 234                 }
 235                 pathnum++;
 236         }
 237 }
 238
 239
 240
 241 struct stats_key *furthestkey(struct stats_key *have)
 242 {
 243         unsigned long count = 0;
 244         unsigned long curdegree = 0;
 245         struct ll *curll, *nextll, *tmp;
 246         struct ll *sigs = NULL;
 247         struct stats_key *max;
 248
 249         if (have == NULL) {
 250                 return NULL;
 251         }
 252
 253         ++curdegree;
 254
 255         nextll = NULL;
 256         max = have;
 257         curll = lladd(NULL, have);
 258
 259         while (curll != NULL) {
 260                 sigs = cached_getkeysigs(((struct stats_key *)
 261                                 curll->object)->keyid);
 262                 while (sigs != NULL) {
 263                         if (((struct stats_key *) sigs->object)->colour == 0) {
 264                                 /*
 265                                  * We've never seen it. Count it, mark it and
 266                                  * explore its subtree.
 267                                  */
 268                                 count++;
 269                                 max = (struct stats_key *)sigs->object;
 270                                 ((struct stats_key *)sigs->object)->colour =
 271                                         curdegree;
 272                                 ((struct stats_key *)sigs->object)->parent =
 273                                         ((struct stats_key *)
 274                                          curll->object)->keyid;
 275
 276                                 nextll=lladd(nextll, sigs->object);
 277                         }
 278                         sigs=sigs->next;
 279                 }
 280                 tmp = curll->next;
 281                 free(curll);
 282                 curll = tmp;
 283                 if (curll == NULL) {
 284                         curll = nextll;
 285                         nextll = NULL;
 286                         ++curdegree;
 287                 };
 288         }
 289
 290         return max;
 291 }