/*
 *  Bacula File Daemon	verify.c  Verify files.
 *
 *    Kern Sibbald, October MM
 *
 *   Version $Id: verify.c,v 1.33 2004/06/09 11:52:24 kerns Exp $
 *
 */
/*
   Copyright (C) 2000-2003 Kern Sibbald and John Walker

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public
   License along with this program; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
   MA 02111-1307, USA.

 */

#include "bacula.h"
#include "filed.h"

static int verify_file(FF_PKT *ff_pkt, void *my_pkt);

/* 
 * Find all the requested files and send attributes
 * to the Director.
 * 
 */
void do_verify(JCR *jcr)
{
   set_jcr_job_status(jcr, JS_Running);
   jcr->buf_size = DEFAULT_NETWORK_BUFFER_SIZE;
   if ((jcr->big_buf = (char *) malloc(jcr->buf_size)) == NULL) {
      Jmsg1(jcr, M_ABORT, 0, _("Cannot malloc %d network read buffer\n"), 
	 DEFAULT_NETWORK_BUFFER_SIZE);
   }
   set_find_options((FF_PKT *)jcr->ff, jcr->incremental, jcr->mtime);
   Dmsg0(10, "Start find files\n");
   /* Subroutine verify_file() is called for each file */
   find_files(jcr, (FF_PKT *)jcr->ff, verify_file, (void *)jcr);  
   Dmsg0(10, "End find files\n");

   if (jcr->big_buf) {
      free(jcr->big_buf);
      jcr->big_buf = NULL;
   }
   set_jcr_job_status(jcr, JS_Terminated);
}	   

/* 
 * Called here by find() for each file.
 *
 *  Find the file, compute the MD5 or SHA1 and send it back to the Director
 */
static int verify_file(FF_PKT *ff_pkt, void *pkt) 
{
   char attribs[MAXSTRING];
   int64_t n;
   int stat;
   BFILE bfd;
   struct MD5Context md5c;
   struct SHA1Context sha1c;
   unsigned char signature[25];       /* large enough for either */
   BSOCK *dir;
   JCR *jcr = (JCR *)pkt;

   if (job_canceled(jcr)) {
      return 0;
   }
   
   dir = jcr->dir_bsock;
   jcr->num_files_examined++;	      /* bump total file count */

   switch (ff_pkt->type) {
   case FT_LNKSAVED:		      /* Hard linked, file already saved */
      Dmsg2(30, "FT_LNKSAVED saving: %s => %s\n", ff_pkt->fname, ff_pkt->link);
      break;
   case FT_REGE:
      Dmsg1(30, "FT_REGE saving: %s\n", ff_pkt->fname);
      break;
   case FT_REG:
      Dmsg1(30, "FT_REG saving: %s\n", ff_pkt->fname);
      break;
   case FT_LNK:
      Dmsg2(30, "FT_LNK saving: %s -> %s\n", ff_pkt->fname, ff_pkt->link);
      break;
   case FT_DIRBEGIN:
      return 1; 		      /* ignored */
   case FT_DIREND:
      Dmsg1(30, "FT_DIR saving: %s\n", ff_pkt->fname);
      break;
   case FT_SPEC:
      Dmsg1(30, "FT_SPEC saving: %s\n", ff_pkt->fname);
      break;
   case FT_RAW:
      Dmsg1(30, "FT_RAW saving: %s\n", ff_pkt->fname);
      break;
   case FT_FIFO:
      Dmsg1(30, "FT_FIFO saving: %s\n", ff_pkt->fname);
      break;
   case FT_NOACCESS:
      Jmsg(jcr, M_NOTSAVED, -1, _("     Could not access %s: ERR=%s\n"), ff_pkt->fname, strerror(ff_pkt->ff_errno));
      jcr->Errors++;
      return 1;
   case FT_NOFOLLOW:
      Jmsg(jcr, M_NOTSAVED, -1, _("     Could not follow link %s: ERR=%s\n"), ff_pkt->fname, strerror(ff_pkt->ff_errno));
      jcr->Errors++;
      return 1;
   case FT_NOSTAT:
      Jmsg(jcr, M_NOTSAVED, -1, _("     Could not stat %s: ERR=%s\n"), ff_pkt->fname, strerror(ff_pkt->ff_errno));
      jcr->Errors++;
      return 1;
   case FT_DIRNOCHG:
   case FT_NOCHG:
      Jmsg(jcr, M_SKIPPED, -1, _("     Unchanged file skipped: %s\n"), ff_pkt->fname);
      return 1;
   case FT_ISARCH:
      Jmsg(jcr, M_SKIPPED, -1, _("     Archive file skipped: %s\n"), ff_pkt->fname);
      return 1;
   case FT_NORECURSE:
      Jmsg(jcr, M_SKIPPED, -1, _("     Recursion turned off. Directory skipped: %s\n"), ff_pkt->fname);
      return 1;
   case FT_NOFSCHG:
      Jmsg(jcr, M_SKIPPED, -1, _("     File system change prohibited. Directory skipped: %s\n"), ff_pkt->fname);
      return 1;
   case FT_NOOPEN:
      Jmsg(jcr, M_NOTSAVED, -1, _("     Could not open directory %s: ERR=%s\n"), ff_pkt->fname, strerror(ff_pkt->ff_errno));
      jcr->Errors++;
      return 1;
   default:
      Jmsg(jcr, M_NOTSAVED, 0, _("     Unknown file type %d: %s\n"), ff_pkt->type, ff_pkt->fname);
      jcr->Errors++;
      return 1;
   }

   binit(&bfd);

   if (ff_pkt->type != FT_LNKSAVED && (S_ISREG(ff_pkt->statp.st_mode) && 
	 ff_pkt->statp.st_size > 0) || 
	 ff_pkt->type == FT_RAW || ff_pkt->type == FT_FIFO) {
      if ((bopen(&bfd, ff_pkt->fname, O_RDONLY | O_BINARY, 0)) < 0) {
	 ff_pkt->ff_errno = errno;
         Jmsg(jcr, M_NOTSAVED, -1, _("     Cannot open %s: ERR=%s.\n"),
	      ff_pkt->fname, berror(&bfd));
	 jcr->Errors++;
	 return 1;
      }
   }

   encode_stat(attribs, ff_pkt, 0);
     
   P(jcr->mutex);
   jcr->JobFiles++;		     /* increment number of files sent */
   pm_strcpy(&jcr->last_fname, ff_pkt->fname);
   V(jcr->mutex);

   /* 
    * Send file attributes to Director
    *	File_index
    *	Stream
    *	Verify Options
    *	Filename (full path)
    *	Encoded attributes
    *	Link name (if type==FT_LNK)
    * For a directory, link is the same as fname, but with trailing
    * slash. For a linked file, link is the link.
    */
   /* Send file attributes to Director (note different format than for Storage) */
   Dmsg2(400, "send ATTR inx=%d fname=%s\n", jcr->JobFiles, ff_pkt->fname);
   if (ff_pkt->type == FT_LNK || ff_pkt->type == FT_LNKSAVED) {
      stat = bnet_fsend(dir, "%d %d %s %s%c%s%c%s%c", jcr->JobFiles,
		    STREAM_UNIX_ATTRIBUTES, ff_pkt->VerifyOpts, ff_pkt->fname, 
		    0, attribs, 0, ff_pkt->link, 0);
   } else if (ff_pkt->type == FT_DIREND) {
      /* Here link is the canonical filename (i.e. with trailing slash) */
      stat = bnet_fsend(dir,"%d %d %s %s%c%s%c%c", jcr->JobFiles,
		    STREAM_UNIX_ATTRIBUTES, ff_pkt->VerifyOpts, ff_pkt->link, 
		    0, attribs, 0, 0);
   } else {
      stat = bnet_fsend(dir,"%d %d %s %s%c%s%c%c", jcr->JobFiles,
		    STREAM_UNIX_ATTRIBUTES, ff_pkt->VerifyOpts, ff_pkt->fname, 
		    0, attribs, 0, 0);
   }
   Dmsg2(20, "bfiled>bdird: attribs len=%d: msg=%s\n", dir->msglen, dir->msg);
   if (!stat) {
      Jmsg(jcr, M_FATAL, 0, _("Network error in send to Director: ERR=%s\n"), bnet_strerror(dir));
      if (is_bopen(&bfd)) {
	 bclose(&bfd);
      }
      return 0;
   }

   /* If file opened, compute MD5 or SHA1 hash */
   if (is_bopen(&bfd)  && ff_pkt->flags & FO_MD5) {
      char MD5buf[40];		      /* 24 should do */
      MD5Init(&md5c);
      while ((n=bread(&bfd, jcr->big_buf, jcr->buf_size)) > 0) {
	 MD5Update(&md5c, ((unsigned char *)jcr->big_buf), (int)n);
	 jcr->JobBytes += n;
	 jcr->ReadBytes += n;
      }
      if (n < 0) {
         Jmsg(jcr, M_ERROR, -1, _("Error reading file %s: ERR=%s\n"), 
	      ff_pkt->fname, berror(&bfd));
	 jcr->Errors++;
      }
      MD5Final(signature, &md5c);

      bin_to_base64(MD5buf, (char *)signature, 16); /* encode 16 bytes */
      Dmsg2(400, "send inx=%d MD5=%s\n", jcr->JobFiles, MD5buf);
      bnet_fsend(dir, "%d %d %s *MD5-%d*", jcr->JobFiles, STREAM_MD5_SIGNATURE, MD5buf,
	 jcr->JobFiles);
      Dmsg2(20, "bfiled>bdird: MD5 len=%d: msg=%s\n", dir->msglen, dir->msg);
   } else if (is_bopen(&bfd) && ff_pkt->flags & FO_SHA1) {
      char SHA1buf[40]; 	      /* 24 should do */
      SHA1Init(&sha1c);
      while ((n=bread(&bfd, jcr->big_buf, jcr->buf_size)) > 0) {
	 SHA1Update(&sha1c, ((unsigned char *)jcr->big_buf), (int)n);
	 jcr->JobBytes += n;
	 jcr->ReadBytes += n;
      }
      if (n < 0) {
         Jmsg(jcr, M_ERROR, -1, _("Error reading file %s: ERR=%s\n"), 
	      ff_pkt->fname, berror(&bfd));
	 jcr->Errors++;
      }
      SHA1Final(&sha1c, signature);

      bin_to_base64(SHA1buf, (char *)signature, 20); /* encode 20 bytes */
      Dmsg2(400, "send inx=%d SHA1=%s\n", jcr->JobFiles, SHA1buf);
      bnet_fsend(dir, "%d %d %s *SHA1-%d*", jcr->JobFiles, STREAM_SHA1_SIGNATURE, 
	 SHA1buf, jcr->JobFiles);
      Dmsg2(20, "bfiled>bdird: SHA1 len=%d: msg=%s\n", dir->msglen, dir->msg);
   }
   if (is_bopen(&bfd)) {
      bclose(&bfd);
   }
   return 1;
}
