2 * Dolda Connect - Modular multiuser Direct Connect-style client
3 * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com)
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
41 #include "sysevents.h"
45 struct scanstate *next;
46 struct sharecache *node;
52 struct scanqueue *next;
53 struct scanstate *state;
56 static int conf_share(int argc, wchar_t **argv);
57 static void freecache(struct sharecache *node);
58 static void checkhashes(void);
60 static struct configvar myvars[] =
62 {CONF_VAR_STRING, "defnick", {.str = L"DoldaConnect user"}},
63 {CONF_VAR_INT, "scanfilemask", {.num = 0004}},
64 {CONF_VAR_INT, "scandirmask", {.num = 0005}},
65 {CONF_VAR_STRING, "hashcache", {.str = L"dc-hashcache"}},
69 static struct configcmd mycmds[] =
71 {"share", conf_share},
75 static struct scanstate *scanjob = NULL;
76 static struct scanqueue *scanqueue = NULL;
77 static struct sharepoint *shares = NULL;
78 static struct hashcache *hashcache = NULL;
79 static pid_t hashjob = 0;
80 struct sharecache *shareroot = NULL;
81 unsigned long long sharesize = 0;
82 GCBCHAIN(sharechangecb, unsigned long long);
84 static int conf_share(int argc, wchar_t **argv)
86 struct sharepoint *share;
91 flog(LOG_WARNING, "not enough arguments given for share command");
94 if((b = icwcstombs(argv[2], NULL)) == NULL)
96 flog(LOG_WARNING, "could not convert wcs path (%ls) to current locale's charset: %s", argv[2], strerror(errno));
99 for(share = shares; share != NULL; share = share->next)
101 if(!strcmp(share->path, b) && !wcscmp(share->name, argv[1]))
108 share = smalloc(sizeof(*share));
111 share->name = swcsdup(argv[1]);
112 share->next = shares;
115 shares->prev = share;
120 static void dumpsharecache(struct sharecache *node, int l)
124 for(; node != NULL; node = node->next)
126 for(i = 0; i < l; i++)
128 printf("%ls\n", node->name);
129 if(node->f.b.type == FILE_DIR)
130 dumpsharecache(node->child, l + 1);
134 struct hash *newhash(wchar_t *algo, size_t len, char *buf)
138 ret = smalloc(sizeof(*ret));
139 memset(ret, 0, sizeof(*ret));
140 ret->algo = swcsdup(algo);
142 ret->buf = memcpy(smalloc(len), buf, len);
146 void freehash(struct hash *hash)
153 struct hash *duphash(struct hash *hash)
155 return(newhash(hash->algo, hash->len, hash->buf));
158 struct hash *parsehash(wchar_t *text)
161 char *mbsbuf, *decbuf;
165 if((p = wcschr(text, L':')) == NULL)
168 if((mbsbuf = icwcstombs(p, "US-ASCII")) == NULL)
170 decbuf = base64decode(mbsbuf, &buflen);
174 ret = newhash(text, buflen, decbuf);
179 wchar_t *unparsehash(struct hash *hash)
181 static wchar_t *buf = NULL;
184 size_t bufsize, bufdata;
189 bufsize = bufdata = 0;
190 hbuf = base64encode(hash->buf, hash->len);
191 if((whbuf = icmbstowcs(hbuf, "US-ASCII")) == NULL)
193 flog(LOG_CRIT, "bug! could not convert base64 from us-ascii: %s", strerror(errno));
197 bufcat(buf, hash->algo, wcslen(hash->algo));
199 bufcat(buf, whbuf, wcslen(whbuf));
205 int hashcmp(struct hash *h1, struct hash *h2)
207 if(wcscmp(h1->algo, h2->algo))
209 if(h1->len != h2->len)
211 if(memcmp(h1->buf, h2->buf, h1->len))
216 static struct hashcache *newhashcache(void)
218 struct hashcache *new;
220 new = smalloc(sizeof(*new));
221 memset(new, 0, sizeof(*new));
222 new->next = hashcache;
224 if(hashcache != NULL)
225 hashcache->prev = new;
230 static void freehashcache(struct hashcache *hc)
233 hc->next->prev = hc->prev;
235 hc->prev->next = hc->next;
237 hashcache = hc->next;
241 static char *findhashcachefile(int filldef)
243 static char ret[128];
246 if(getenv("HOME") != NULL)
248 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
249 if(!access(ret, R_OK))
252 if((hcname = icswcstombs(confgetstr("cli", "hashcache"), NULL, NULL)) == NULL)
254 flog(LOG_WARNING, "could not convert hash cache name into local charset: %s", strerror(errno));
257 if(strchr(hcname, '/') != NULL)
259 if(!access(hcname, R_OK))
265 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
266 if(!access(ret, R_OK))
268 snprintf(ret, sizeof(ret), "/usr/etc/%s", hcname);
269 if(!access(ret, R_OK))
271 snprintf(ret, sizeof(ret), "/usr/local/etc/%s", hcname);
272 if(!access(ret, R_OK))
277 if(getenv("HOME") != NULL)
278 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
280 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
287 static struct hashcache *findhashcache(dev_t dev, ino_t inode)
289 struct hashcache *hc;
291 for(hc = hashcache; hc != NULL; hc = hc->next)
293 if((hc->dev == dev) && (hc->inode == inode))
299 static void readhashcache(void)
305 char *p, *p2, *wv[32], *hash;
306 struct hashcache *hc;
309 if((hcname = findhashcachefile(0)) == NULL)
311 if((stream = fopen(hcname, "r")) == NULL)
313 flog(LOG_WARNING, "could not open hash cache %s: %s", hcname, strerror(errno));
316 while(hashcache != NULL)
317 freehashcache(hashcache);
321 fgets(linebuf, sizeof(linebuf), stream);
323 for(p = linebuf; *p; p++)
328 if(linebuf[0] == '#')
330 for(wc = 0, p = linebuf; (wc < 32) && ((p2 = strchr(p, ' ')) != NULL); p = p2 + 1)
340 hc->dev = strtoll(wv[0], NULL, 10);
341 hc->inode = strtoll(wv[1], NULL, 10);
342 hc->mtime = strtoll(wv[2], NULL, 10);
343 for(i = 3; i < wc; i++)
345 if(!strcmp(wv[i], "tth"))
349 hash = base64decode(wv[i], &len);
355 memcpy(hc->tth, hash, 24);
363 static void writehashcache(void)
368 struct hashcache *hc;
370 hcname = findhashcachefile(1);
371 if((stream = fopen(hcname, "w")) == NULL)
373 flog(LOG_WARNING, "could not write hash cache %s: %s", hcname, strerror(errno));
376 fprintf(stream, "# Dolda Connect hash cache file\n");
377 fprintf(stream, "# Generated automatically, do not edit\n");
378 fprintf(stream, "# Format: DEVICE INODE MTIME [HASH...]\n");
379 fprintf(stream, "# HASH := HASHTYPE HASHVAL\n");
380 fprintf(stream, "# HASHTYPE can currently only be `tth'\n");
381 for(hc = hashcache; hc != NULL; hc = hc->next)
383 buf = base64encode(hc->tth, 24);
384 fprintf(stream, "%lli %lli %li tth %s\n", hc->dev, (long long)hc->inode, hc->mtime, buf);
390 static void hashread(struct socket *sk, void *uudata)
392 static char *hashbuf;
393 static size_t hashbufsize = 0, hashbufdata = 0;
394 char *buf, *p, *p2, *lp;
401 struct hashcache *hc;
403 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
405 bufcat(hashbuf, buf, bufsize);
407 while((lp = memchr(hashbuf, '\n', hashbufdata)) != NULL)
414 while((p2 = strchr(p, ' ')) == p)
427 flog(LOG_ERR, "BUG: unexpected number of words (%i) arrived from hashing process", wc);
429 dev = strtoll(wv[0], NULL, 10);
430 inode = strtoll(wv[1], NULL, 10);
431 mtime = strtol(wv[2], NULL, 10);
432 if((hc = findhashcache(dev, inode)) == NULL)
439 buf = base64decode(wv[3], NULL);
440 memcpy(hc->tth, buf, 24);
444 memmove(hashbuf, lp, hashbufdata -= (lp - hashbuf));
448 static void hashexit(pid_t pid, int status, void *uudata)
451 flog(LOG_ERR, "BUG: hashing process changed PID?! old: %i new %i", hashjob, pid);
453 flog(LOG_WARNING, "hashing process exited with non-zero status: %i", status);
458 static int hashfile(char *path)
465 struct tigertreehash tth;
467 struct socket *outsock;
469 if((fd = open(path, O_RDONLY)) < 0)
471 flog(LOG_WARNING, "could not open %s for hashing: %s", path, strerror(errno));
474 if(fstat(fd, &sb) < 0)
476 flog(LOG_WARNING, "could not stat %s while hashing: %s", path, strerror(errno));
482 flog(LOG_WARNING, "could not create pipe(!): %s", strerror(errno));
489 flog(LOG_WARNING, "could not fork(!) hashing process: %s", strerror(errno));
498 signal(SIGHUP, SIG_DFL);
500 pfd[1] = dup2(pfd[1], 3);
503 for(i = 3; i < FD_SETSIZE; i++)
507 while((ret = read(0, buf, 4096)) > 0)
508 dotigertree(&tth, buf, ret);
511 flog(LOG_WARNING, "could not read from %s while hashing: %s", path, strerror(errno));
515 restigertree(&tth, digest);
516 ret = snprintf(buf, sizeof(buf), "%lli %lli %li %s\n", sb.st_dev, (long long)sb.st_ino, sb.st_mtime, base64encode(digest, 24));
522 outsock = wrapsock(pfd[0]);
523 outsock->readcb = hashread;
524 childcallback(hashjob, hashexit, NULL);
529 * Call only when hashjob == 0
531 static void checkhashes(void)
533 struct sharecache *node;
534 struct hashcache *hc;
537 node = shareroot->child;
540 if(node->child != NULL)
545 if(!node->f.b.hastth)
547 if((hc = findhashcache(node->dev, node->inode)) != NULL)
549 memcpy(node->hashtth, hc->tth, 24);
550 node->f.b.hastth = 1;
551 GCBCHAINDOCB(sharechangecb, sharesize);
553 path = getfspath(node);
556 flog(LOG_WARNING, "could not hash %s, unsharing it", path);
563 while(node->next == NULL)
565 if((node = node->parent) == shareroot)
568 if(node == shareroot)
574 struct sharecache *nextscnode(struct sharecache *node)
576 if(node->child != NULL)
578 while(node->next == NULL)
581 if(node == shareroot)
587 static void freescan(struct scanstate *job)
594 /* No need for optimization; lookup isn't really that common */
595 struct sharecache *findcache(struct sharecache *parent, wchar_t *name)
597 struct sharecache *node;
599 for(node = parent->child; node != NULL; node = node->next)
601 if(!wcscmp(node->name, name))
607 static void attachcache(struct sharecache *parent, struct sharecache *node)
609 node->parent = parent;
610 node->next = parent->child;
611 if(parent->child != NULL)
612 parent->child->prev = node;
613 parent->child = node;
616 static void detachcache(struct sharecache *node)
618 if(node->next != NULL)
619 node->next->prev = node->prev;
620 if(node->prev != NULL)
621 node->prev->next = node->next;
622 if((node->parent != NULL) && (node->parent->child == node))
623 node->parent->child = node->next;
629 static void freecache(struct sharecache *node)
631 struct sharecache *cur, *next;
632 struct scanqueue *q, *nq, **fq;
636 for(q = scanqueue; q != NULL; q = nq)
639 if(q->state->node == node)
641 flog(LOG_DEBUG, "freed node %ls cancelled queued scan", node->name);
649 if(node->child != NULL)
651 for(cur = node->child; cur != NULL; cur = next)
657 CBCHAINDOCB(node, share_delete, node);
658 CBCHAINFREE(node, share_delete);
659 sharesize -= node->size;
660 if(node->path != NULL)
662 if(node->name != NULL)
667 static void freesharepoint(struct sharepoint *share)
669 struct sharecache *node;
671 if(share->next != NULL)
672 share->next->prev = share->prev;
673 if(share->prev != NULL)
674 share->prev->next = share->next;
676 shares = share->next;
677 if((node = findcache(shareroot, share->name)) != NULL)
684 static struct sharecache *newcache(void)
686 struct sharecache *new;
688 new = smalloc(sizeof(*new));
689 memset(new, 0, sizeof(*new));
690 CBCHAININIT(new, share_delete);
694 char *getfspath(struct sharecache *node)
699 buf = smalloc(bufsize = 64);
703 if(node->path != NULL)
705 if(bufsize < strlen(node->path) + strlen(buf) + 1)
706 buf = srealloc(buf, strlen(node->path) + strlen(buf) + 1);
707 memmove(buf + strlen(node->path), buf, strlen(buf) + 1);
708 memcpy(buf, node->path, strlen(node->path));
711 if((mbsname = icwcstombs(node->name, NULL)) == NULL)
713 flog(LOG_WARNING, "could not map unicode share name (%ls) into filesystem charset: %s", node->name, strerror(errno));
717 while(bufsize < strlen(mbsname) + 1 + strlen(buf) + 1)
718 buf = srealloc(buf, bufsize *= 2);
719 memmove(buf + strlen(mbsname) + 1, buf, strlen(buf) + 1);
720 memcpy(buf + 1, mbsname, strlen(mbsname));
725 buf = srealloc(buf, strlen(buf) + 1);
729 static int checknode(struct sharecache *node)
734 if(node->parent == NULL)
738 if(!checknode(node->parent))
740 path = getfspath(node);
741 if(stat(path, &sb) < 0)
743 flog(LOG_INFO, "%s was found to be broken (%s); scheduling rescan of parent", path, strerror(errno));
744 queuescan(node->parent);
752 int opensharecache(struct sharecache *node)
757 path = getfspath(node);
758 fd = open(path, O_RDONLY);
762 flog(LOG_WARNING, "could not open %s: %s", path, strerror(errbak));
770 static struct scanstate *newscan(struct sharecache *node)
772 struct scanstate *new;
774 new = smalloc(sizeof(*new));
781 void queuescan(struct sharecache *node)
783 struct scanqueue *new;
785 new = smalloc(sizeof(*new));
786 new->state = newscan(node);
787 new->next = scanqueue;
791 /* For internal use in doscan() */
792 static void removestale(struct sharecache *node)
794 struct sharecache *cur, *next;
796 for(cur = node->child; cur != NULL; cur = next)
804 /* For internal use in doscan() */
805 static void jobdone(void)
807 struct scanstate *jbuf;
810 scanjob = jbuf->next;
813 fchdir(dirfd(scanjob->dd));
816 int doscan(int quantum)
821 struct sharecache *n;
822 struct scanstate *jbuf;
823 struct scanqueue *qbuf;
826 struct hashcache *hc;
828 static int busybefore = 0;
830 dmask = confgetint("cli", "scandirmask");
831 fmask = confgetint("cli", "scanfilemask");
832 if((scanjob != NULL) && (scanjob->dd != NULL))
834 while(fchdir(dirfd(scanjob->dd)) < 0)
836 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
837 removestale(scanjob->node);
847 while(scanjob == NULL)
849 if(scanqueue == NULL)
853 flog(LOG_INFO, "sharing %lli bytes", sharesize);
855 GCBCHAINDOCB(sharechangecb, sharesize);
862 scanjob = scanqueue->state;
864 scanqueue = qbuf->next;
866 for(n = scanjob->node->child; n != NULL; n = n->next)
870 if(scanjob->dd == NULL)
872 path = getfspath(scanjob->node);
873 if((scanjob->dd = opendir(path)) == NULL)
875 flog(LOG_WARNING, "cannot open directory %s for scanning: %s, deleting from share", path, strerror(errno));
876 freecache(scanjob->node);
882 if(fchdir(dirfd(scanjob->dd)) < 0)
884 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
889 if((de = readdir(scanjob->dd)) == NULL)
891 removestale(scanjob->node);
895 if(*de->d_name == '.')
897 if((wcs = icmbstowcs(de->d_name, NULL)) == NULL)
899 flog(LOG_WARNING, "file name %s has cannot be converted to wchar: %s", de->d_name, strerror(errno));
902 n = findcache(scanjob->node, wcs);
903 if(stat(de->d_name, &sb) < 0)
908 flog(LOG_WARNING, "could not stat %s: %s, deleting from share", de->d_name, strerror(errno));
911 flog(LOG_WARNING, "could not stat %s: %s", de->d_name, strerror(errno));
915 if(S_ISDIR(sb.st_mode))
917 if(~sb.st_mode & dmask)
923 } else if(S_ISREG(sb.st_mode)) {
924 if(~sb.st_mode & fmask)
931 flog(LOG_WARNING, "unhandled file type: %i", sb.st_mode);
937 if((n->f.b.type != type) || (n->mtime != sb.st_mtime) || ((type == FILE_REG) && (n->size != sb.st_size)))
947 if(S_ISREG(sb.st_mode))
949 sharesize += (n->size = sb.st_size);
953 n->mtime = sb.st_mtime;
955 n->inode = sb.st_ino;
957 attachcache(scanjob->node, n);
962 if(n->f.b.type == FILE_DIR)
965 jbuf->next = scanjob;
967 } else if(n->f.b.type == FILE_REG) {
968 if(n->f.b.hastth && (n->mtime != sb.st_mtime))
972 if((hc = findhashcache(sb.st_dev, sb.st_ino)) != NULL)
974 if(hc->mtime == n->mtime)
977 memcpy(n->hashtth, hc->tth, 24);
988 void scanshares(void)
990 struct sharepoint *cur;
991 struct sharecache *node;
994 for(cur = shares; cur != NULL; cur = cur->next)
996 if((node = findcache(shareroot, cur->name)) == NULL)
998 if(stat(cur->path, &sb))
1000 flog(LOG_WARNING, "could not stat share \"%ls\": %s", cur->name, strerror(errno));
1003 if(!S_ISDIR(sb.st_mode))
1005 flog(LOG_WARNING, "%s is not a directory; won't share it", cur->path);
1009 node->name = swcsdup(cur->name);
1010 node->path = sstrdup(cur->path);
1011 if(node->path[strlen(node->path) - 1] == '/')
1012 node->path[strlen(node->path) - 1] = 0;
1013 node->f.b.type = FILE_DIR;
1014 attachcache(shareroot, node);
1020 static void preinit(int hup)
1022 struct sharepoint *cur;
1026 for(cur = shares; cur != NULL; cur = cur->next)
1029 shareroot = newcache();
1030 shareroot->name = swcsdup(L"");
1031 shareroot->f.b.type = FILE_DIR;
1035 static int init(int hup)
1037 struct sharepoint *cur, *next;
1040 for(cur = shares; cur != NULL; cur = next)
1044 freesharepoint(cur);
1052 static int run(void)
1057 static void terminate(void)
1060 kill(hashjob, SIGHUP);
1061 while(shares != NULL)
1062 freesharepoint(shares);
1063 freecache(shareroot);
1066 static struct module me =
1077 .terminate = terminate