[rsync/rsync.git] / sender.c

/* 
   Copyright (C) Andrew Tridgell 1996
   Copyright (C) Paul Mackerras 1996
   
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rsync.h"

extern int verbose;
extern int remote_version;
extern int csum_length;
extern struct stats stats;
extern int io_error;
extern int dry_run;
extern int am_server;


/**
 * @file
 *
 * The sender gets checksums from the generator, calculates deltas,
 * and transmits them to the receiver.  The sender process runs on the
 * machine holding the source files.
 **/


/**
 * Receive the checksums for a buffer
 **/
static struct sum_struct *receive_sums(int f)
{
	struct sum_struct *s;
	int i;
	OFF_T offset = 0;

	s = (struct sum_struct *)malloc(sizeof(*s));
	if (!s) out_of_memory("receive_sums");

	s->count = read_int(f);
	s->n = read_int(f);
	s->remainder = read_int(f);  
	s->sums = NULL;

	if (verbose > 3)
		rprintf(FINFO,"count=%ld n=%ld rem=%ld\n",
			(long) s->count, (long) s->n, (long) s->remainder);

	if (s->count == 0) 
		return(s);

	s->sums = (struct sum_buf *)malloc(sizeof(s->sums[0])*s->count);
	if (!s->sums) out_of_memory("receive_sums");

	for (i=0; i < (int) s->count;i++) {
		s->sums[i].sum1 = read_int(f);
		read_buf(f,s->sums[i].sum2,csum_length);

		s->sums[i].offset = offset;
		s->sums[i].i = i;

		if (i == (int) s->count-1 && s->remainder != 0) {
			s->sums[i].len = s->remainder;
		} else {
			s->sums[i].len = s->n;
		}
		offset += s->sums[i].len;

		if (verbose > 3)
			rprintf(FINFO,"chunk[%d] len=%d offset=%.0f sum1=%08x\n",
				i,s->sums[i].len,(double)s->sums[i].offset,s->sums[i].sum1);
	}

	s->flength = offset;

	return s;
}


void send_files(struct file_list *flist,int f_out,int f_in)
{ 
	int fd = -1;
	struct sum_struct *s;
	struct map_struct *buf = NULL;
	STRUCT_STAT st;
	char fname[MAXPATHLEN];  
	int i;
	struct file_struct *file;
	int phase = 0;
	extern struct stats stats;		
	struct stats initial_stats;
	extern int write_batch;   /* dw */
	extern int read_batch;    /* dw */
	int checksums_match;   /* dw */
	int buff_len;  /* dw */
	char buff[CHUNK_SIZE];    /* dw */
	int j;   /* dw */
	int done;   /* dw */

	if (verbose > 2)
		rprintf(FINFO,"send_files starting\n");

	while (1) {
		int offset=0;

		i = read_int(f_in);
		if (i == -1) {
			if (phase==0 && remote_version >= 13) {
				phase++;
				csum_length = SUM_LENGTH;
				write_int(f_out,-1);
				if (verbose > 2)
					rprintf(FINFO,"send_files phase=%d\n",phase);
				continue;
			}
			break;
		}

		if (i < 0 || i >= flist->count) {
			rprintf(FERROR,"Invalid file index %d (count=%d)\n", 
				i, flist->count);
			exit_cleanup(RERR_PROTOCOL);
		}

		file = flist->files[i];

		stats.num_transferred_files++;
		stats.total_transferred_size += file->length;

		fname[0] = 0;
		if (file->basedir) {
			strlcpy(fname,file->basedir,MAXPATHLEN);
			if (strlen(fname) == MAXPATHLEN-1) {
				io_error = 1;
				rprintf(FERROR, "send_files failed on long-named directory %s\n",
					fname);
				return;
			}
			strlcat(fname,"/",MAXPATHLEN);
			offset = strlen(file->basedir)+1;
		}
		strlcat(fname,f_name(file),MAXPATHLEN);
	  
		if (verbose > 2) 
			rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
	  
		if (dry_run) {	
			if (!am_server) {
				log_transfer(file, fname+offset);
			}
			write_int(f_out,i);
			continue;
		}

		initial_stats = stats;

		s = receive_sums(f_in);
		if (!s) {
			io_error = 1;
			rprintf(FERROR,"receive_sums failed\n");
			return;
		}

		if (write_batch)
		    write_batch_csum_info(&i,flist->count,s);
	  
		if (!read_batch) {
			fd = do_open(fname, O_RDONLY, 0);
			if (fd == -1) {
				io_error = 1;
				rprintf(FERROR,"send_files failed to open %s: %s\n",
					fname,strerror(errno));
				free_sums(s);
				continue;
			}
	  
			/* map the local file */
			if (do_fstat(fd,&st) != 0) {
				io_error = 1;
				rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
				free_sums(s);
				close(fd);
				return;
			}
	  
			if (st.st_size > 0) {
				buf = map_file(fd,st.st_size);
			} else {
				buf = NULL;
			}
	  
			if (verbose > 2)
				rprintf(FINFO,"send_files mapped %s of size %.0f\n",
					fname,(double)st.st_size);

			write_int(f_out,i);
	  
			if (write_batch)
				write_batch_delta_file((char *)&i,sizeof(i));

			write_int(f_out,s->count);
			write_int(f_out,s->n);
			write_int(f_out,s->remainder);
		}
	  
		if (verbose > 2)
			if (!read_batch)
			    rprintf(FINFO,"calling match_sums %s\n",fname);
	  
		if (!am_server) {
			log_transfer(file, fname+offset);
		}

		set_compression(fname);

                if (read_batch) { /* dw */
                   /* read checksums originally computed on sender side */
                   read_batch_csum_info(i, s, &checksums_match);
                   if (checksums_match) {
                       read_batch_delta_file( (char *) &j, sizeof(int) );
                       if (j != i) {    /* if flist index entries don't match*/ 
                          rprintf(FINFO,"index mismatch in send_files\n");
                          rprintf(FINFO,"read index = %d flist ndx = %d\n",j,i);
                          close_batch_delta_file();
                          close_batch_csums_file();
                          exit_cleanup(1);
                       }
                       else {
                         write_int(f_out,j);
                         write_int(f_out,s->count);
                         write_int(f_out,s->n);
                         write_int(f_out,s->remainder);
                         done=0;
                         while (!done) {
                            read_batch_delta_file( (char *) &buff_len, sizeof(int) );
                            write_int(f_out,buff_len);
                            if (buff_len == 0) {
                               done = 1;
                            }
                            else {
                               if (buff_len > 0) {
                                  read_batch_delta_file(buff, buff_len);
                                  write_buf(f_out,buff,buff_len);
                               }
                            }
                         }  /* end while  */
                         read_batch_delta_file( buff, MD4_SUM_LENGTH);
                         write_buf(f_out, buff, MD4_SUM_LENGTH);

                       }  /* j=i */
                   } else {  /* not checksum match */
                      rprintf (FINFO,"readbatch & checksums don't match\n");
                      rprintf (FINFO,"filename=%s is being skipped\n",
			       fname);
                      continue;
                   }
                } else  {
		    match_sums(f_out,s,buf,st.st_size);
		    log_send(file, &initial_stats);
                }

		if (!read_batch) { /* dw */
		    if (buf) unmap_file(buf);
		    close(fd);
		}
	  
		free_sums(s);
	  
		if (verbose > 2)
			rprintf(FINFO,"sender finished %s\n",fname);
	}

	if (verbose > 2)
		rprintf(FINFO,"send files finished\n");

	match_report();

	write_int(f_out,-1);
	if (write_batch || read_batch) { /* dw */
	    close_batch_csums_file();
	    close_batch_delta_file();
	}

}
Commit	Line	Data
2f03f956 AT	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
0f9c48b1 MP	31	/**
	32	* @file
	33	*
	34	* The sender gets checksums from the generator, calculates deltas,
	35	* and transmits them to the receiver. The sender process runs on the
	36	* machine holding the source files.
	37	**/
	38
	39
ce8149b6 MP	40	/**
	41	* Receive the checksums for a buffer
	42	**/
2f03f956 AT	43	static struct sum_struct *receive_sums(int f)
	44	{
	45	struct sum_struct *s;
	46	int i;
	47	OFF_T offset = 0;
	48
	49	s = (struct sum_struct )malloc(sizeof(s));
	50	if (!s) out_of_memory("receive_sums");
	51
	52	s->count = read_int(f);
	53	s->n = read_int(f);
	54	s->remainder = read_int(f);
	55	s->sums = NULL;
	56
	57	if (verbose > 3)
ce8149b6 MP	58	rprintf(FINFO,"count=%ld n=%ld rem=%ld\n",
ce8149b6 MP	59	(long) s->count, (long) s->n, (long) s->remainder);
2f03f956 AT	60
	61	if (s->count == 0)
	62	return(s);
	63
	64	s->sums = (struct sum_buf )malloc(sizeof(s->sums[0])s->count);
	65	if (!s->sums) out_of_memory("receive_sums");
	66
a261989c	67	for (i=0; i < (int) s->count;i++) {
2f03f956 AT	68	s->sums[i].sum1 = read_int(f);
	69	read_buf(f,s->sums[i].sum2,csum_length);
	70
	71	s->sums[i].offset = offset;
	72	s->sums[i].i = i;
	73
a261989c	74	if (i == (int) s->count-1 && s->remainder != 0) {
2f03f956 AT	75	s->sums[i].len = s->remainder;
	76	} else {
	77	s->sums[i].len = s->n;
	78	}
	79	offset += s->sums[i].len;
	80
	81	if (verbose > 3)
5f808dfb AT	82	rprintf(FINFO,"chunk[%d] len=%d offset=%.0f sum1=%08x\n",
5f808dfb AT	83	i,s->sums[i].len,(double)s->sums[i].offset,s->sums[i].sum1);
2f03f956 AT	84	}
	85
	86	s->flength = offset;
	87
	88	return s;
	89	}
	90
	91
	92
	93	void send_files(struct file_list *flist,int f_out,int f_in)
	94	{
c1659c79	95	int fd = -1;
2f03f956	96	struct sum_struct *s;
c1659c79	97	struct map_struct *buf = NULL;
2f03f956 AT	98	STRUCT_STAT st;
	99	char fname[MAXPATHLEN];
	100	int i;
	101	struct file_struct *file;
	102	int phase = 0;
1b7c47cb AT	103	extern struct stats stats;
1b7c47cb AT	104	struct stats initial_stats;
6902ed17	105	extern int write_batch; /* dw */
6902ed17 MP	106	extern int read_batch; /* dw */
	107	int checksums_match; /* dw */
	108	int buff_len; /* dw */
	109	char buff[CHUNK_SIZE]; /* dw */
	110	int j; /* dw */
	111	int done; /* dw */
2f03f956 AT	112
	113	if (verbose > 2)
	114	rprintf(FINFO,"send_files starting\n");
	115
2f03f956 AT	116	while (1) {
	117	int offset=0;
	118
	119	i = read_int(f_in);
	120	if (i == -1) {
	121	if (phase==0 && remote_version >= 13) {
	122	phase++;
	123	csum_length = SUM_LENGTH;
	124	write_int(f_out,-1);
	125	if (verbose > 2)
	126	rprintf(FINFO,"send_files phase=%d\n",phase);
	127	continue;
	128	}
	129	break;
	130	}
	131
	132	if (i < 0 \|\| i >= flist->count) {
	133	rprintf(FERROR,"Invalid file index %d (count=%d)\n",
	134	i, flist->count);
65417579	135	exit_cleanup(RERR_PROTOCOL);
2f03f956 AT	136	}
	137
	138	file = flist->files[i];
	139
	140	stats.num_transferred_files++;
	141	stats.total_transferred_size += file->length;
	142
	143	fname[0] = 0;
	144	if (file->basedir) {
37f9805d	145	strlcpy(fname,file->basedir,MAXPATHLEN);
2f03f956 AT	146	if (strlen(fname) == MAXPATHLEN-1) {
	147	io_error = 1;
	148	rprintf(FERROR, "send_files failed on long-named directory %s\n",
	149	fname);
	150	return;
	151	}
37f9805d	152	strlcat(fname,"/",MAXPATHLEN);
2f03f956 AT	153	offset = strlen(file->basedir)+1;
2f03f956 AT	154	}
37f9805d	155	strlcat(fname,f_name(file),MAXPATHLEN);
2f03f956 AT	156
	157	if (verbose > 2)
	158	rprintf(FINFO,"send_files(%d,%s)\n",i,fname);
	159
	160	if (dry_run) {
11a5a3c7 AT	161	if (!am_server) {
	162	log_transfer(file, fname+offset);
	163	}
2f03f956 AT	164	write_int(f_out,i);
	165	continue;
	166	}
	167
1b7c47cb AT	168	initial_stats = stats;
1b7c47cb AT	169
2f03f956 AT	170	s = receive_sums(f_in);
	171	if (!s) {
	172	io_error = 1;
	173	rprintf(FERROR,"receive_sums failed\n");
	174	return;
	175	}
76f79ba7 MP	176
	177	if (write_batch)
	178	write_batch_csum_info(&i,flist->count,s);
2f03f956	179
6902ed17	180	if (!read_batch) {
c1659c79 MP	181	fd = do_open(fname, O_RDONLY, 0);
	182	if (fd == -1) {
	183	io_error = 1;
	184	rprintf(FERROR,"send_files failed to open %s: %s\n",
	185	fname,strerror(errno));
	186	free_sums(s);
	187	continue;
	188	}
2f03f956	189
c1659c79 MP	190	/* map the local file */
	191	if (do_fstat(fd,&st) != 0) {
	192	io_error = 1;
	193	rprintf(FERROR,"fstat failed : %s\n",strerror(errno));
	194	free_sums(s);
	195	close(fd);
	196	return;
	197	}
2f03f956	198
c1659c79 MP	199	if (st.st_size > 0) {
	200	buf = map_file(fd,st.st_size);
	201	} else {
	202	buf = NULL;
	203	}
2f03f956	204
c1659c79 MP	205	if (verbose > 2)
	206	rprintf(FINFO,"send_files mapped %s of size %.0f\n",
	207	fname,(double)st.st_size);
11a5a3c7	208
c1659c79	209	write_int(f_out,i);
2f03f956	210
c1659c79 MP	211	if (write_batch)
c1659c79 MP	212	write_batch_delta_file((char *)&i,sizeof(i));
6902ed17	213
c1659c79 MP	214	write_int(f_out,s->count);
	215	write_int(f_out,s->n);
	216	write_int(f_out,s->remainder);
6902ed17	217	}
2f03f956 AT	218
2f03f956 AT	219	if (verbose > 2)
6902ed17 MP	220	if (!read_batch)
6902ed17 MP	221	rprintf(FINFO,"calling match_sums %s\n",fname);
2f03f956	222
11a5a3c7 AT	223	if (!am_server) {
	224	log_transfer(file, fname+offset);
	225	}
83fff1aa AT	226
83fff1aa AT	227	set_compression(fname);
1b7c47cb	228
6902ed17 MP	229	if (read_batch) { /* dw */
	230	/* read checksums originally computed on sender side */
	231	read_batch_csum_info(i, s, &checksums_match);
	232	if (checksums_match) {
	233	read_batch_delta_file( (char *) &j, sizeof(int) );
	234	if (j != i) { /* if flist index entries don't match*/
	235	rprintf(FINFO,"index mismatch in send_files\n");
	236	rprintf(FINFO,"read index = %d flist ndx = %d\n",j,i);
	237	close_batch_delta_file();
	238	close_batch_csums_file();
	239	exit_cleanup(1);
	240	}
	241	else {
	242	write_int(f_out,j);
	243	write_int(f_out,s->count);
	244	write_int(f_out,s->n);
	245	write_int(f_out,s->remainder);
	246	done=0;
	247	while (!done) {
	248	read_batch_delta_file( (char *) &buff_len, sizeof(int) );
	249	write_int(f_out,buff_len);
	250	if (buff_len == 0) {
	251	done = 1;
	252	}
	253	else {
	254	if (buff_len > 0) {
	255	read_batch_delta_file(buff, buff_len);
	256	write_buf(f_out,buff,buff_len);
	257	}
	258	}
	259	} /* end while */
	260	read_batch_delta_file( buff, MD4_SUM_LENGTH);
	261	write_buf(f_out, buff, MD4_SUM_LENGTH);
	262
	263	} /* j=i */
	264	} else { /* not checksum match */
07e95008 MP	265	rprintf (FINFO,"readbatch & checksums don't match\n");
	266	rprintf (FINFO,"filename=%s is being skipped\n",
	267	fname);
6902ed17 MP	268	continue;
	269	}
	270	} else {
	271	match_sums(f_out,s,buf,st.st_size);
	272	log_send(file, &initial_stats);
	273	}
	274
	275	if (!read_batch) { /* dw */
	276	if (buf) unmap_file(buf);
	277	close(fd);
	278	}
2f03f956 AT	279
	280	free_sums(s);
	281
	282	if (verbose > 2)
	283	rprintf(FINFO,"sender finished %s\n",fname);
	284	}
	285
	286	if (verbose > 2)
	287	rprintf(FINFO,"send files finished\n");
	288
	289	match_report();
	290
	291	write_int(f_out,-1);
6902ed17 MP	292	if (write_batch \|\| read_batch) { /* dw */
	293	close_batch_csums_file();
	294	close_batch_delta_file();
	295	}
	296
2f03f956 AT	297	}
	298
	299
	300
	301
	302