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 csum_length;
  24 extern struct stats stats;
  25 extern int io_error;
  26 extern int dry_run;
  27 extern int am_server;
  28
  29
  30 /**
  31  * @file
  32  *
  33  * The sender gets checksums from the generator, calculates deltas,
  34  * and transmits them to the receiver.  The sender process runs on the
  35  * machine holding the source files.
  36  **/
  37
  38
  39 void read_sum_head(int f, struct sum_struct *sum)
  40 {
  41         extern int protocol_version;
  42
  43         sum->count = read_int(f);
  44         sum->blength = read_int(f);
  45         if (protocol_version < 27)
  46                 sum->s2length = csum_length;
  47         else
  48                 sum->s2length = read_int(f);
  49         sum->remainder = read_int(f);
  50 }
  51
  52 /**
  53  * Receive the checksums for a buffer
  54  **/
  55 static struct sum_struct *receive_sums(int f)
  56 {
  57         struct sum_struct *s;
  58         int i;
  59         OFF_T offset = 0;
  60
  61         s = (struct sum_struct *)malloc(sizeof(*s));
  62         if (!s) out_of_memory("receive_sums");
  63
  64         read_sum_head(f, s);
  65
  66         s->sums = NULL;
  67
  68         if (verbose > 3)
  69                 rprintf(FINFO, "count=%ld n=%ld rem=%ld\n",
  70                         (long) s->count, (long) s->blength,
  71                         (long) s->remainder);
  72
  73         if (s->count == 0)
  74                 return(s);
  75
  76         s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
  77         if (!s->sums) out_of_memory("receive_sums");
  78
  79         for (i = 0; i < (int) s->count; i++) {
  80                 s->sums[i].sum1 = read_int(f);
  81                 read_buf(f, s->sums[i].sum2, s->s2length);
  82
  83                 s->sums[i].offset = offset;
  84                 s->sums[i].i = i;
  85
  86                 if (i == (int) s->count-1 && s->remainder != 0) {
  87                         s->sums[i].len = s->remainder;
  88                 } else {
  89                         s->sums[i].len = s->blength;
  90                 }
  91                 offset += s->sums[i].len;
  92
  93                 if (verbose > 3)
  94                         rprintf(FINFO, "chunk[%d] len=%d offset=%.0f sum1=%08x\n",
  95                                 i, s->sums[i].len, (double)s->sums[i].offset, s->sums[i].sum1);
  96         }
  97
  98         s->flength = offset;
  99
 100         return s;
 101 }
 102
 103
 104
 105 void send_files(struct file_list *flist, int f_out, int f_in)
 106 {
 107         int fd = -1;
 108         struct sum_struct *s;
 109         struct map_struct *buf = NULL;
 110         STRUCT_STAT st;
 111         char fname[MAXPATHLEN];
 112         int i;
 113         struct file_struct *file;
 114         int phase = 0;
 115         extern struct stats stats;
 116         struct stats initial_stats;
 117         extern int write_batch;   /* dw */
 118         extern int read_batch;    /* dw */
 119         int checksums_match;   /* dw */
 120         int buff_len;  /* dw */
 121         char buff[CHUNK_SIZE];    /* dw */
 122         int j;   /* dw */
 123         int done;   /* dw */
 124
 125         if (verbose > 2)
 126                 rprintf(FINFO, "send_files starting\n");
 127
 128         while (1) {
 129                 int offset = 0;
 130
 131                 i = read_int(f_in);
 132                 if (i == -1) {
 133                         if (phase == 0) {
 134                                 phase++;
 135                                 csum_length = SUM_LENGTH;
 136                                 write_int(f_out, -1);
 137                                 if (verbose > 2)
 138                                         rprintf(FINFO, "send_files phase=%d\n", phase);
 139                                 continue;
 140                         }
 141                         break;
 142                 }
 143
 144                 if (i < 0 || i >= flist->count) {
 145                         rprintf(FERROR, "Invalid file index %d (count=%d)\n",
 146                                 i, flist->count);
 147                         exit_cleanup(RERR_PROTOCOL);
 148                 }
 149
 150                 file = flist->files[i];
 151
 152                 stats.num_transferred_files++;
 153                 stats.total_transferred_size += file->length;
 154
 155                 fname[0] = 0;
 156                 if (file->basedir) {
 157                         strlcpy(fname, file->basedir, MAXPATHLEN);
 158                         if (strlen(fname) == MAXPATHLEN-1) {
 159                                 io_error = 1;
 160                                 rprintf(FERROR, "send_files failed on long-named directory %s\n",
 161                                         full_fname(fname));
 162                                 return;
 163                         }
 164                         strlcat(fname, "/", MAXPATHLEN);
 165                         offset = strlen(file->basedir)+1;
 166                 }
 167                 strlcat(fname, f_name(file), MAXPATHLEN);
 168
 169                 if (verbose > 2)
 170                         rprintf(FINFO, "send_files(%d, %s)\n", i, fname);
 171
 172                 if (dry_run) {
 173                         if (!am_server && verbose) {    /* log transfer */
 174                                 rprintf(FINFO, "%s\n", fname+offset);
 175                         }
 176                         write_int(f_out, i);
 177                         continue;
 178                 }
 179
 180                 initial_stats = stats;
 181
 182                 s = receive_sums(f_in);
 183                 if (!s) {
 184                         io_error = 1;
 185                         rprintf(FERROR, "receive_sums failed\n");
 186                         return;
 187                 }
 188
 189                 if (write_batch)
 190                         write_batch_csum_info(&i, flist->count, s);
 191
 192                 if (!read_batch) {
 193                         fd = do_open(fname, O_RDONLY, 0);
 194                         if (fd == -1) {
 195                                 io_error = 1;
 196                                 rprintf(FERROR, "send_files failed to open %s: %s\n",
 197                                         full_fname(fname), strerror(errno));
 198                                 free_sums(s);
 199                                 continue;
 200                         }
 201
 202                         /* map the local file */
 203                         if (do_fstat(fd, &st) != 0) {
 204                                 io_error = 1;
 205                                 rprintf(FERROR, "fstat failed: %s\n", strerror(errno));
 206                                 free_sums(s);
 207                                 close(fd);
 208                                 return;
 209                         }
 210
 211                         if (st.st_size > 0) {
 212                                 buf = map_file(fd, st.st_size);
 213                         } else {
 214                                 buf = NULL;
 215                         }
 216
 217                         if (verbose > 2)
 218                                 rprintf(FINFO, "send_files mapped %s of size %.0f\n",
 219                                         fname, (double)st.st_size);
 220
 221                         write_int(f_out, i);
 222
 223                         if (write_batch)
 224                                 write_batch_delta_file((char *)&i, sizeof(i));
 225
 226                         write_sum_head(f_out, s);
 227                 }
 228
 229                 if (verbose > 2 && !read_batch)
 230                         rprintf(FINFO, "calling match_sums %s\n", fname);
 231
 232                 if (!am_server && verbose) {    /* log transfer */
 233                         rprintf(FINFO, "%s\n", fname+offset);
 234                 }
 235
 236                 set_compression(fname);
 237
 238                 if (read_batch) { /* dw */
 239                         /* read checksums originally computed on sender side */
 240                         read_batch_csum_info(i, s, &checksums_match);
 241                         if (checksums_match) {
 242                                 read_batch_delta_file( (char *) &j, sizeof(int) );
 243                                 if (j != i) {    /* if flist index entries don't match*/
 244                                         rprintf(FINFO, "index mismatch in send_files\n");
 245                                         rprintf(FINFO, "read index = %d flist ndx = %d\n", j, i);
 246                                         close_batch_delta_file();
 247                                         close_batch_csums_file();
 248                                         exit_cleanup(1);
 249                                 } else {
 250                                         write_int(f_out, j);
 251                                         write_sum_head(f_out, s);
 252                                         done = 0;
 253                                         while (!done) {
 254                                                 read_batch_delta_file( (char *) &buff_len, sizeof(int) );
 255                                                 write_int(f_out, buff_len);
 256                                                 if (buff_len == 0) {
 257                                                         done = 1;
 258                                                 } else {
 259                                                         if (buff_len > 0) {
 260                                                                 read_batch_delta_file(buff, buff_len);
 261                                                                 write_buf(f_out, buff, buff_len);
 262                                                         }
 263                                                 }
 264                                         }  /* end while  */
 265                                         read_batch_delta_file( buff, MD4_SUM_LENGTH);
 266                                         write_buf(f_out, buff, MD4_SUM_LENGTH);
 267
 268                                 }  /* j=i */
 269                         } else {  /* not checksum match */
 270                                 rprintf (FINFO, "readbatch & checksums don't match\n");
 271                                 rprintf (FINFO, "filename=%s is being skipped\n", fname);
 272                                 continue;
 273                         }
 274                 } else  {
 275                         match_sums(f_out, s, buf, st.st_size);
 276                         log_send(file, &initial_stats);
 277                 }
 278
 279                 if (!read_batch) { /* dw */
 280                         if (buf) {
 281                                 j = unmap_file(buf);
 282                                 if (j) {
 283                                         io_error = 1;
 284                                         rprintf(FERROR,
 285                                             "read errors mapping %s: (%d) %s\n",
 286                                             full_fname(fname),
 287                                             j,
 288                                             strerror(j));
 289                                 }
 290                         }
 291                         close(fd);
 292                 }
 293
 294                 free_sums(s);
 295
 296                 if (verbose > 2)
 297                         rprintf(FINFO, "sender finished %s\n", fname);
 298         }
 299
 300         if (verbose > 2)
 301                 rprintf(FINFO, "send files finished\n");
 302
 303         match_report();
 304
 305         write_int(f_out, -1);
 306         if (write_batch || read_batch) { /* dw */
 307                 close_batch_csums_file();
 308                 close_batch_delta_file();
 309         }
 310
 311 }
 312
 313
 314
 315
 316