sender.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4
   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.
   9
  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.
  14
  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., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include "rsync.h"
  21
  22 extern int verbose;
  23 extern int remote_version;
  24 extern int csum_length;
  25 extern struct stats stats;
  26 extern int io_error;
  27 extern int dry_run;
  28 extern int am_server;
  29
  30
  31 /*
  32   receive the checksums for a buffer
  33   */
  34 static struct sum_struct *receive_sums(int f)
  35 {
  36         struct sum_struct *s;
  37         int i;
  38         OFF_T offset = 0;
  39
  40         s = (struct sum_struct *)malloc(sizeof(*s));
  41         if (!s) out_of_memory("receive_sums");
  42
  43         s->count = read_int(f);
  44         s->n = read_int(f);
  45         s->remainder = read_int(f);
  46         s->sums = NULL;
  47
  48         if (verbose > 3)
  49                 rprintf(FINFO,"count=%d n=%d rem=%d\n",
  50                         s->count,s->n,s->remainder);
  51
  52         if (s->count == 0)
  53                 return(s);
  54
  55         s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
  56         if (!s->sums) out_of_memory("receive_sums");
  57
  58         for (i=0;i<s->count;i++) {
  59                 s->sums[i].sum1 = read_int(f);
  60                 read_buf(f,s->sums[i].sum2,csum_length);
  61
  62                 s->sums[i].offset = offset;
  63                 s->sums[i].i = i;
  64
  65                 if (i == s->count-1 && s->remainder != 0) {
  66                         s->sums[i].len = s->remainder;
  67                 } else {
  68                         s->sums[i].len = s->n;
  69                 }
  70                 offset += s->sums[i].len;
  71
  72                 if (verbose > 3)
  73                         rprintf(FINFO,"chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  74                                 i,s->sums[i].len,(double)s->sums[i].offset,s->sums[i].sum1);
  75         }
  76
  77         s->flength = offset;
  78
  79         return s;
  80 }
  81
  82
  83
  84 void send_files(struct file_list *flist,int f_out,int f_in)
  85 {
  86         int fd;
  87         struct sum_struct *s;
  88         struct map_struct *buf;
  89         STRUCT_STAT st;
  90         char fname[MAXPATHLEN];
  91         int i;
  92         struct file_struct *file;
  93         int phase = 0;
  94         extern struct stats stats;
  95         struct stats initial_stats;
  96         extern int write_batch;   /* dw */
  97         extern int read_batch;    /* dw */
  98         int checksums_match;   /* dw */
  99         int buff_len;  /* dw */
 100         char buff[CHUNK_SIZE];    /* dw */
 101         int j;   /* dw */
 102         int done;   /* dw */
 103
 104         if (verbose > 2)
 105                 rprintf(FINFO,"send_files starting\n");
 106
 107         while (1) {
 108                 int offset=0;
 109
 110                 i = read_int(f_in);
 111                 if (i == -1) {
 112                         if (phase==0 && remote_version >= 13) {
 113                                 phase++;
 114                                 csum_length = SUM_LENGTH;
 115                                 write_int(f_out,-1);
 116                                 if (verbose > 2)
 117                                         rprintf(FINFO,"send_files phase=%d\n",phase);
 118                                 continue;
 119                         }
 120                         break;
 121                 }
 122
 123                 if (i < 0 || i >= flist->count) {
 124                         rprintf(FERROR,"Invalid file index %d (count=%d)\n",
 125                                 i, flist->count);
 126                         exit_cleanup(RERR_PROTOCOL);
 127                 }
 128
 129                 file = flist->files[i];
 130
 131                 stats.num_transferred_files++;
 132                 stats.total_transferred_size += file->length;
 133
 134                 fname[0] = 0;
 135                 if (file->basedir) {
 136                         strlcpy(fname,file->basedir,MAXPATHLEN);
 137                         if (strlen(fname) == MAXPATHLEN-1) {
 138                                 io_error = 1;
 139                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 140                                         fname);
 141                                 return;
 142                         }
 143                         strlcat(fname,"/",MAXPATHLEN);
 144                         offset = strlen(file->basedir)+1;
 145                 }
 146                 strlcat(fname,f_name(file),MAXPATHLEN);
 147
 148                 if (verbose > 2)
 149                         rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
 150
 151                 if (dry_run) {
 152                         if (!am_server) {
 153                                 log_transfer(file, fname+offset);
 154                         }
 155                         write_int(f_out,i);
 156                         continue;
 157                 }
 158
 159                 initial_stats = stats;
 160
 161                 s = receive_sums(f_in);
 162                 if (write_batch) /* dw */
 163                     write_batch_csum_info(&i,flist->count,s);
 164                 if (!s) {
 165                         io_error = 1;
 166                         rprintf(FERROR,"receive_sums failed\n");
 167                         return;
 168                 }
 169
 170                 if (!read_batch) {
 171                 fd = do_open(fname, O_RDONLY, 0);
 172                 if (fd == -1) {
 173                         io_error = 1;
 174                         rprintf(FERROR,"send_files failed to open %s: %s\n",
 175                                 fname,strerror(errno));
 176                         free_sums(s);
 177                         continue;
 178                 }
 179
 180                 /* map the local file */
 181                 if (do_fstat(fd,&st) != 0) {
 182                         io_error = 1;
 183                         rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
 184                         free_sums(s);
 185                         close(fd);
 186                         return;
 187                 }
 188
 189                 if (st.st_size > 0) {
 190                         buf = map_file(fd,st.st_size);
 191                 } else {
 192                         buf = NULL;
 193                 }
 194
 195                 if (verbose > 2)
 196                         rprintf(FINFO,"send_files mapped %s of size %.0f\n",
 197                                 fname,(double)st.st_size);
 198                 }
 199
 200                 if (!read_batch) { /* dw */
 201                     write_int(f_out,i);
 202
 203                     if (write_batch)
 204                         write_batch_delta_file((char *)&i,sizeof(i));
 205
 206                     write_int(f_out,s->count);
 207                     write_int(f_out,s->n);
 208                     write_int(f_out,s->remainder);
 209                 }
 210
 211                 if (verbose > 2)
 212                         if (!read_batch)
 213                             rprintf(FINFO,"calling match_sums %s\n",fname);
 214
 215                 if (!am_server) {
 216                         log_transfer(file, fname+offset);
 217                 }
 218
 219                 set_compression(fname);
 220
 221                 if (read_batch) { /* dw */
 222                    /* read checksums originally computed on sender side */
 223                    read_batch_csum_info(i, s, &checksums_match);
 224                    if (checksums_match) {
 225                        read_batch_delta_file( (char *) &j, sizeof(int) );
 226                        if (j != i) {    /* if flist index entries don't match*/
 227                           rprintf(FINFO,"index mismatch in send_files\n");
 228                           rprintf(FINFO,"read index = %d flist ndx = %d\n",j,i);
 229                           close_batch_delta_file();
 230                           close_batch_csums_file();
 231                           exit_cleanup(1);
 232                        }
 233                        else {
 234                          write_int(f_out,j);
 235                          write_int(f_out,s->count);
 236                          write_int(f_out,s->n);
 237                          write_int(f_out,s->remainder);
 238                          done=0;
 239                          while (!done) {
 240                             read_batch_delta_file( (char *) &buff_len, sizeof(int) );
 241                             write_int(f_out,buff_len);
 242                             if (buff_len == 0) {
 243                                done = 1;
 244                             }
 245                             else {
 246                                if (buff_len > 0) {
 247                                   read_batch_delta_file(buff, buff_len);
 248                                   write_buf(f_out,buff,buff_len);
 249                                }
 250                             }
 251                          }  /* end while  */
 252                          read_batch_delta_file( buff, MD4_SUM_LENGTH);
 253                          write_buf(f_out, buff, MD4_SUM_LENGTH);
 254
 255                        }  /* j=i */
 256                    } else {  /* not checksum match */
 257                       rprintf (FINFO,"readbatch & checksums don't match\n");
 258                       rprintf (FINFO,"filename=%s is being skipped\n",
 259                                fname);
 260                       continue;
 261                    }
 262                 } else  {
 263                     match_sums(f_out,s,buf,st.st_size);
 264                     log_send(file, &initial_stats);
 265                 }
 266
 267                 if (!read_batch) { /* dw */
 268                     if (buf) unmap_file(buf);
 269                     close(fd);
 270                 }
 271
 272                 free_sums(s);
 273
 274                 if (verbose > 2)
 275                         rprintf(FINFO,"sender finished %s\n",fname);
 276         }
 277
 278         if (verbose > 2)
 279                 rprintf(FINFO,"send files finished\n");
 280
 281         match_report();
 282
 283         write_int(f_out,-1);
 284         if (write_batch || read_batch) { /* dw */
 285             close_batch_csums_file();
 286             close_batch_delta_file();
 287         }
 288
 289 }
 290
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