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 /* Set initially to -1, but changed to 0 the first time run() is
80 * called. This is to avoid forking a hash job before daemonizing,
81 * since that would make the daemon unable to wait() for the hash
83 static pid_t hashjob = -1;
84 struct sharecache *shareroot = NULL;
85 unsigned long long sharesize = 0;
86 GCBCHAIN(sharechangecb, unsigned long long);
88 static int conf_share(int argc, wchar_t **argv)
90 struct sharepoint *share;
95 flog(LOG_WARNING, "not enough arguments given for share command");
98 if((b = icwcstombs(argv[2], NULL)) == NULL)
100 flog(LOG_WARNING, "could not convert wcs path (%ls) to current locale's charset: %s", argv[2], strerror(errno));
103 for(share = shares; share != NULL; share = share->next)
105 if(!strcmp(share->path, b) && !wcscmp(share->name, argv[1]))
112 share = smalloc(sizeof(*share));
115 share->name = swcsdup(argv[1]);
116 share->next = shares;
119 shares->prev = share;
124 static void dumpsharecache(struct sharecache *node, int l)
128 for(; node != NULL; node = node->next)
130 for(i = 0; i < l; i++)
132 printf("%ls\n", node->name);
133 if(node->f.b.type == FILE_DIR)
134 dumpsharecache(node->child, l + 1);
138 struct hash *newhash(wchar_t *algo, size_t len, char *buf)
142 ret = smalloc(sizeof(*ret));
143 memset(ret, 0, sizeof(*ret));
144 ret->algo = swcsdup(algo);
146 ret->buf = memcpy(smalloc(len), buf, len);
150 void freehash(struct hash *hash)
157 struct hash *duphash(struct hash *hash)
159 return(newhash(hash->algo, hash->len, hash->buf));
162 struct hash *parsehash(wchar_t *text)
165 char *mbsbuf, *decbuf;
169 if((p = wcschr(text, L':')) == NULL)
172 if((mbsbuf = icwcstombs(p, "US-ASCII")) == NULL)
174 decbuf = base64decode(mbsbuf, &buflen);
178 ret = newhash(text, buflen, decbuf);
183 wchar_t *unparsehash(struct hash *hash)
185 static wchar_t *buf = NULL;
188 size_t bufsize, bufdata;
193 bufsize = bufdata = 0;
194 hbuf = base64encode(hash->buf, hash->len);
195 if((whbuf = icmbstowcs(hbuf, "US-ASCII")) == NULL)
197 flog(LOG_CRIT, "bug! could not convert base64 from us-ascii: %s", strerror(errno));
201 bufcat(buf, hash->algo, wcslen(hash->algo));
203 bufcat(buf, whbuf, wcslen(whbuf));
209 int hashcmp(struct hash *h1, struct hash *h2)
211 if(wcscmp(h1->algo, h2->algo))
213 if(h1->len != h2->len)
215 if(memcmp(h1->buf, h2->buf, h1->len))
220 static struct hashcache *newhashcache(void)
222 struct hashcache *new;
224 new = smalloc(sizeof(*new));
225 memset(new, 0, sizeof(*new));
226 new->next = hashcache;
228 if(hashcache != NULL)
229 hashcache->prev = new;
234 static void freehashcache(struct hashcache *hc)
237 hc->next->prev = hc->prev;
239 hc->prev->next = hc->next;
241 hashcache = hc->next;
245 static char *findhashcachefile(int filldef)
247 static char ret[128];
250 if(getenv("HOME") != NULL)
252 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
253 if(!access(ret, R_OK))
256 if((hcname = icswcstombs(confgetstr("cli", "hashcache"), NULL, NULL)) == NULL)
258 flog(LOG_WARNING, "could not convert hash cache name into local charset: %s", strerror(errno));
261 if(strchr(hcname, '/') != NULL)
263 if(!access(hcname, R_OK))
269 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
270 if(!access(ret, R_OK))
272 snprintf(ret, sizeof(ret), "/usr/etc/%s", hcname);
273 if(!access(ret, R_OK))
275 snprintf(ret, sizeof(ret), "/usr/local/etc/%s", hcname);
276 if(!access(ret, R_OK))
281 if(getenv("HOME") != NULL)
282 snprintf(ret, sizeof(ret), "%s/.dc-hashcache", getenv("HOME"));
284 snprintf(ret, sizeof(ret), "/etc/%s", hcname);
291 static struct hashcache *findhashcache(dev_t dev, ino_t inode)
293 struct hashcache *hc;
295 for(hc = hashcache; hc != NULL; hc = hc->next)
297 if((hc->dev == dev) && (hc->inode == inode))
303 static void readhashcache(void)
309 char *p, *p2, *wv[32], *hash;
310 struct hashcache *hc;
313 if((hcname = findhashcachefile(0)) == NULL)
315 if((stream = fopen(hcname, "r")) == NULL)
317 flog(LOG_WARNING, "could not open hash cache %s: %s", hcname, strerror(errno));
320 while(hashcache != NULL)
321 freehashcache(hashcache);
325 fgets(linebuf, sizeof(linebuf), stream);
327 for(p = linebuf; *p; p++)
332 if(linebuf[0] == '#')
334 for(wc = 0, p = linebuf; (wc < 32) && ((p2 = strchr(p, ' ')) != NULL); p = p2 + 1)
344 hc->dev = strtoll(wv[0], NULL, 10);
345 hc->inode = strtoll(wv[1], NULL, 10);
346 hc->mtime = strtoll(wv[2], NULL, 10);
347 for(i = 3; i < wc; i++)
349 if(!strcmp(wv[i], "tth"))
353 hash = base64decode(wv[i], &len);
359 memcpy(hc->tth, hash, 24);
367 static void writehashcache(void)
372 struct hashcache *hc;
374 hcname = findhashcachefile(1);
375 if((stream = fopen(hcname, "w")) == NULL)
377 flog(LOG_WARNING, "could not write hash cache %s: %s", hcname, strerror(errno));
380 fprintf(stream, "# Dolda Connect hash cache file\n");
381 fprintf(stream, "# Generated automatically, do not edit\n");
382 fprintf(stream, "# Format: DEVICE INODE MTIME [HASH...]\n");
383 fprintf(stream, "# HASH := HASHTYPE HASHVAL\n");
384 fprintf(stream, "# HASHTYPE can currently only be `tth'\n");
385 for(hc = hashcache; hc != NULL; hc = hc->next)
387 buf = base64encode(hc->tth, 24);
388 fprintf(stream, "%lli %lli %li tth %s\n", hc->dev, (long long)hc->inode, hc->mtime, buf);
394 static void hashread(struct socket *sk, void *uudata)
396 static char *hashbuf;
397 static size_t hashbufsize = 0, hashbufdata = 0;
398 char *buf, *p, *p2, *lp;
405 struct hashcache *hc;
407 if((buf = sockgetinbuf(sk, &bufsize)) == NULL)
409 bufcat(hashbuf, buf, bufsize);
411 while((lp = memchr(hashbuf, '\n', hashbufdata)) != NULL)
418 while((p2 = strchr(p, ' ')) == p)
431 flog(LOG_ERR, "BUG: unexpected number of words (%i) arrived from hashing process", wc);
433 dev = strtoll(wv[0], NULL, 10);
434 inode = strtoll(wv[1], NULL, 10);
435 mtime = strtol(wv[2], NULL, 10);
436 if((hc = findhashcache(dev, inode)) == NULL)
443 buf = base64decode(wv[3], NULL);
444 memcpy(hc->tth, buf, 24);
448 memmove(hashbuf, lp, hashbufdata -= (lp - hashbuf));
452 static void hashexit(pid_t pid, int status, void *uudata)
455 flog(LOG_ERR, "BUG: hashing process changed PID?! old: %i new %i", hashjob, pid);
457 flog(LOG_WARNING, "hashing process exited with non-zero status: %i", status);
462 static int hashfile(char *path)
469 struct tigertreehash tth;
471 struct socket *outsock;
473 if((fd = open(path, O_RDONLY)) < 0)
475 flog(LOG_WARNING, "could not open %s for hashing: %s", path, strerror(errno));
478 if(fstat(fd, &sb) < 0)
480 flog(LOG_WARNING, "could not stat %s while hashing: %s", path, strerror(errno));
486 flog(LOG_WARNING, "could not create pipe(!): %s", strerror(errno));
493 flog(LOG_WARNING, "could not fork(!) hashing process: %s", strerror(errno));
502 signal(SIGHUP, SIG_DFL);
504 pfd[1] = dup2(pfd[1], 3);
507 for(i = 3; i < FD_SETSIZE; i++)
511 while((ret = read(0, buf, 4096)) > 0)
512 dotigertree(&tth, buf, ret);
515 flog(LOG_WARNING, "could not read from %s while hashing: %s", path, strerror(errno));
519 restigertree(&tth, digest);
520 ret = snprintf(buf, sizeof(buf), "%lli %lli %li %s\n", sb.st_dev, (long long)sb.st_ino, sb.st_mtime, base64encode(digest, 24));
526 outsock = wrapsock(pfd[0]);
527 outsock->readcb = hashread;
528 childcallback(hashjob, hashexit, NULL);
533 * Call only when hashjob == 0
535 static void checkhashes(void)
537 struct sharecache *node;
538 struct hashcache *hc;
541 node = shareroot->child;
542 for(node = shareroot->child; node != NULL; node = nextscnode(node))
544 if(node->f.b.type != FILE_REG)
546 if(!node->f.b.hastth)
548 if((hc = findhashcache(node->dev, node->inode)) != NULL)
550 memcpy(node->hashtth, hc->tth, 24);
551 node->f.b.hastth = 1;
552 GCBCHAINDOCB(sharechangecb, sharesize);
554 path = getfspath(node);
557 flog(LOG_WARNING, "could not hash %s, unsharing it", path);
560 flog(LOG_INFO, "sharing %lli bytes", sharesize);
570 struct sharecache *nextscnode(struct sharecache *node)
572 if(node->child != NULL)
574 while(node->next == NULL)
577 if(node == shareroot)
583 static void freescan(struct scanstate *job)
590 /* No need for optimization; lookup isn't really that common */
591 struct sharecache *findcache(struct sharecache *parent, wchar_t *name)
593 struct sharecache *node;
595 for(node = parent->child; node != NULL; node = node->next)
597 if(!wcscmp(node->name, name))
603 static void attachcache(struct sharecache *parent, struct sharecache *node)
605 node->parent = parent;
606 node->next = parent->child;
607 if(parent->child != NULL)
608 parent->child->prev = node;
609 parent->child = node;
612 static void detachcache(struct sharecache *node)
614 if(node->next != NULL)
615 node->next->prev = node->prev;
616 if(node->prev != NULL)
617 node->prev->next = node->next;
618 if((node->parent != NULL) && (node->parent->child == node))
619 node->parent->child = node->next;
625 static void freecache(struct sharecache *node)
627 struct sharecache *cur, *next;
628 struct scanqueue *q, *nq, **fq;
632 for(q = scanqueue; q != NULL; q = nq)
635 if(q->state->node == node)
637 flog(LOG_DEBUG, "freed node %ls cancelled queued scan", node->name);
645 if(node->child != NULL)
647 for(cur = node->child; cur != NULL; cur = next)
653 CBCHAINDOCB(node, share_delete, node);
654 CBCHAINFREE(node, share_delete);
655 sharesize -= node->size;
656 if(node->path != NULL)
658 if(node->name != NULL)
663 static void freesharepoint(struct sharepoint *share)
665 struct sharecache *node;
667 if(share->next != NULL)
668 share->next->prev = share->prev;
669 if(share->prev != NULL)
670 share->prev->next = share->next;
672 shares = share->next;
673 if((node = findcache(shareroot, share->name)) != NULL)
680 static struct sharecache *newcache(void)
682 struct sharecache *new;
684 new = smalloc(sizeof(*new));
685 memset(new, 0, sizeof(*new));
686 CBCHAININIT(new, share_delete);
690 char *getfspath(struct sharecache *node)
695 buf = smalloc(bufsize = 64);
699 if(node->path != NULL)
701 if(bufsize < strlen(node->path) + strlen(buf) + 1)
702 buf = srealloc(buf, strlen(node->path) + strlen(buf) + 1);
703 memmove(buf + strlen(node->path), buf, strlen(buf) + 1);
704 memcpy(buf, node->path, strlen(node->path));
707 if((mbsname = icwcstombs(node->name, NULL)) == NULL)
709 flog(LOG_WARNING, "could not map unicode share name (%ls) into filesystem charset: %s", node->name, strerror(errno));
713 while(bufsize < strlen(mbsname) + 1 + strlen(buf) + 1)
714 buf = srealloc(buf, bufsize *= 2);
715 memmove(buf + strlen(mbsname) + 1, buf, strlen(buf) + 1);
716 memcpy(buf + 1, mbsname, strlen(mbsname));
721 buf = srealloc(buf, strlen(buf) + 1);
725 static int checknode(struct sharecache *node)
730 if(node->parent == NULL)
734 if(!checknode(node->parent))
736 path = getfspath(node);
737 if(stat(path, &sb) < 0)
739 flog(LOG_INFO, "%s was found to be broken (%s); scheduling rescan of parent", path, strerror(errno));
740 queuescan(node->parent);
748 int opensharecache(struct sharecache *node)
753 path = getfspath(node);
754 fd = open(path, O_RDONLY);
758 flog(LOG_WARNING, "could not open %s: %s", path, strerror(errbak));
766 static struct scanstate *newscan(struct sharecache *node)
768 struct scanstate *new;
770 new = smalloc(sizeof(*new));
777 void queuescan(struct sharecache *node)
779 struct scanqueue *new;
781 new = smalloc(sizeof(*new));
782 new->state = newscan(node);
783 new->next = scanqueue;
787 /* For internal use in doscan() */
788 static void removestale(struct sharecache *node)
790 struct sharecache *cur, *next;
792 for(cur = node->child; cur != NULL; cur = next)
800 /* For internal use in doscan() */
801 static void jobdone(void)
803 struct scanstate *jbuf;
806 scanjob = jbuf->next;
809 fchdir(dirfd(scanjob->dd));
812 int doscan(int quantum)
817 struct sharecache *n;
818 struct scanstate *jbuf;
819 struct scanqueue *qbuf;
822 struct hashcache *hc;
824 static int busybefore = 0;
826 dmask = confgetint("cli", "scandirmask");
827 fmask = confgetint("cli", "scanfilemask");
828 if((scanjob != NULL) && (scanjob->dd != NULL))
830 while(fchdir(dirfd(scanjob->dd)) < 0)
832 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
833 removestale(scanjob->node);
843 while(scanjob == NULL)
845 if(scanqueue == NULL)
849 flog(LOG_INFO, "sharing %lli bytes", sharesize);
851 GCBCHAINDOCB(sharechangecb, sharesize);
858 scanjob = scanqueue->state;
860 scanqueue = qbuf->next;
862 for(n = scanjob->node->child; n != NULL; n = n->next)
866 if(scanjob->dd == NULL)
868 path = getfspath(scanjob->node);
869 if((scanjob->dd = opendir(path)) == NULL)
871 flog(LOG_WARNING, "cannot open directory %s for scanning: %s, deleting from share", path, strerror(errno));
872 freecache(scanjob->node);
878 if(fchdir(dirfd(scanjob->dd)) < 0)
880 flog(LOG_WARNING, "could not fchdir to fd %i: %s", dirfd(scanjob->dd), strerror(errno));
885 if((de = readdir(scanjob->dd)) == NULL)
887 removestale(scanjob->node);
891 if(*de->d_name == '.')
893 if((wcs = icmbstowcs(de->d_name, NULL)) == NULL)
895 flog(LOG_WARNING, "file name %s has cannot be converted to wchar: %s", de->d_name, strerror(errno));
898 n = findcache(scanjob->node, wcs);
899 if(stat(de->d_name, &sb) < 0)
904 flog(LOG_WARNING, "could not stat %s: %s, deleting from share", de->d_name, strerror(errno));
907 flog(LOG_WARNING, "could not stat %s: %s", de->d_name, strerror(errno));
911 if(S_ISDIR(sb.st_mode))
913 if(~sb.st_mode & dmask)
919 } else if(S_ISREG(sb.st_mode)) {
920 if(~sb.st_mode & fmask)
927 flog(LOG_WARNING, "unhandled file type: 0%o", sb.st_mode);
933 if((n->f.b.type != type) || (n->mtime != sb.st_mtime) || ((type == FILE_REG) && (n->size != sb.st_size)))
943 if(S_ISREG(sb.st_mode))
945 sharesize += (n->size = sb.st_size);
949 n->mtime = sb.st_mtime;
951 n->inode = sb.st_ino;
953 attachcache(scanjob->node, n);
958 if(n->f.b.type == FILE_DIR)
961 jbuf->next = scanjob;
963 } else if(n->f.b.type == FILE_REG) {
964 if(n->f.b.hastth && (n->mtime != sb.st_mtime))
968 if((hc = findhashcache(sb.st_dev, sb.st_ino)) != NULL)
970 if(hc->mtime == n->mtime)
973 memcpy(n->hashtth, hc->tth, 24);
984 void scanshares(void)
986 struct sharepoint *cur;
987 struct sharecache *node;
990 for(cur = shares; cur != NULL; cur = cur->next)
992 if((node = findcache(shareroot, cur->name)) == NULL)
994 if(stat(cur->path, &sb))
996 flog(LOG_WARNING, "could not stat share \"%ls\": %s", cur->name, strerror(errno));
999 if(!S_ISDIR(sb.st_mode))
1001 flog(LOG_WARNING, "%s is not a directory; won't share it", cur->path);
1005 node->name = swcsdup(cur->name);
1006 node->path = sstrdup(cur->path);
1007 if(node->path[strlen(node->path) - 1] == '/')
1008 node->path[strlen(node->path) - 1] = 0;
1009 node->f.b.type = FILE_DIR;
1010 attachcache(shareroot, node);
1016 static void preinit(int hup)
1018 struct sharepoint *cur;
1022 for(cur = shares; cur != NULL; cur = cur->next)
1025 shareroot = newcache();
1026 shareroot->name = swcsdup(L"");
1027 shareroot->f.b.type = FILE_DIR;
1031 static int init(int hup)
1033 struct sharepoint *cur, *next;
1036 for(cur = shares; cur != NULL; cur = next)
1040 freesharepoint(cur);
1048 static int run(void)
1058 static void terminate(void)
1061 kill(hashjob, SIGHUP);
1062 while(shares != NULL)
1063 freesharepoint(shares);
1064 freecache(shareroot);
1067 static struct module me =
1078 .terminate = terminate