Commit | Line | Data |
---|---|---|
0f78b815 WD |
1 | /* |
2 | * Socket and pipe I/O utilities used in rsync. | |
d62bcc17 | 3 | * |
0f78b815 WD |
4 | * Copyright (C) 1996-2001 Andrew Tridgell |
5 | * Copyright (C) 1996 Paul Mackerras | |
6 | * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org> | |
ba2133d6 | 7 | * Copyright (C) 2003-2007 Wayne Davison |
d62bcc17 | 8 | * |
880da007 | 9 | * This program is free software; you can redistribute it and/or modify |
8e41b68e WD |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 3 of the License, or | |
12 | * (at your option) any later version. | |
d62bcc17 | 13 | * |
880da007 MP |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
d62bcc17 | 18 | * |
e7c67065 | 19 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 20 | * with this program; if not, visit the http://fsf.org website. |
880da007 | 21 | */ |
720b47f2 | 22 | |
0f78b815 WD |
23 | /* Rsync provides its own multiplexing system, which is used to send |
24 | * stderr and stdout over a single socket. | |
87ee2481 MP |
25 | * |
26 | * For historical reasons this is off during the start of the | |
27 | * connection, but it's switched on quite early using | |
0f78b815 | 28 | * io_start_multiplex_out() and io_start_multiplex_in(). */ |
720b47f2 | 29 | |
720b47f2 AT |
30 | #include "rsync.h" |
31 | ||
880da007 | 32 | /** If no timeout is specified then use a 60 second select timeout */ |
8cd9fd4e AT |
33 | #define SELECT_TIMEOUT 60 |
34 | ||
7a55d06e | 35 | extern int bwlimit; |
71e58630 | 36 | extern size_t bwlimit_writemax; |
6ba9279f | 37 | extern int io_timeout; |
cdf236aa | 38 | extern int allowed_lull; |
d17e1dd2 WD |
39 | extern int am_server; |
40 | extern int am_daemon; | |
41 | extern int am_sender; | |
98f8c9a5 | 42 | extern int am_generator; |
3ea6e0e7 | 43 | extern int inc_recurse; |
8ef246e0 | 44 | extern int io_error; |
e626b29e | 45 | extern int eol_nulls; |
8ef246e0 | 46 | extern int flist_eof; |
3b0a30eb | 47 | extern int read_batch; |
188fed95 | 48 | extern int csum_length; |
b9f592fb WD |
49 | extern int checksum_seed; |
50 | extern int protocol_version; | |
47c11975 | 51 | extern int remove_source_files; |
cdf236aa | 52 | extern int preserve_hard_links; |
a800434a | 53 | extern struct stats stats; |
8ef246e0 | 54 | extern struct file_list *cur_flist, *first_flist; |
332cf6df WD |
55 | #ifdef ICONV_OPTION |
56 | extern iconv_t ic_send, ic_recv; | |
57 | #endif | |
720b47f2 | 58 | |
a86179f4 | 59 | const char phase_unknown[] = "unknown"; |
9e2409ab | 60 | int ignore_timeout = 0; |
b9f592fb | 61 | int batch_fd = -1; |
04c722d5 | 62 | int msgdone_cnt = 0; |
805edf9d | 63 | |
cb2e1f18 | 64 | /* Ignore an EOF error if non-zero. See whine_about_eof(). */ |
574c2500 | 65 | int kluge_around_eof = 0; |
7a55d06e | 66 | |
d17e1dd2 WD |
67 | int msg_fd_in = -1; |
68 | int msg_fd_out = -1; | |
cdf236aa WD |
69 | int sock_f_in = -1; |
70 | int sock_f_out = -1; | |
7a55d06e | 71 | |
8ef246e0 WD |
72 | static int iobuf_f_in = -1; |
73 | static char *iobuf_in; | |
74 | static size_t iobuf_in_siz; | |
75 | static size_t iobuf_in_ndx; | |
76 | static size_t iobuf_in_remaining; | |
77 | ||
78 | static int iobuf_f_out = -1; | |
79 | static char *iobuf_out; | |
80 | static int iobuf_out_cnt; | |
81 | ||
82 | int flist_forward_from = -1; | |
83 | ||
1f75bb10 WD |
84 | static int io_multiplexing_out; |
85 | static int io_multiplexing_in; | |
3b0a30eb WD |
86 | static time_t last_io_in; |
87 | static time_t last_io_out; | |
1f75bb10 WD |
88 | static int no_flush; |
89 | ||
b9f592fb WD |
90 | static int write_batch_monitor_in = -1; |
91 | static int write_batch_monitor_out = -1; | |
92 | ||
56014c8c WD |
93 | static int io_filesfrom_f_in = -1; |
94 | static int io_filesfrom_f_out = -1; | |
95 | static char io_filesfrom_buf[2048]; | |
332cf6df WD |
96 | #ifdef ICONV_OPTION |
97 | static char iconv_buf[sizeof io_filesfrom_buf / 2]; | |
98 | #endif | |
56014c8c WD |
99 | static char *io_filesfrom_bp; |
100 | static char io_filesfrom_lastchar; | |
101 | static int io_filesfrom_buflen; | |
954bbed8 | 102 | static int defer_forwarding_messages = 0; |
3b0a30eb | 103 | static int select_timeout = SELECT_TIMEOUT; |
d6081c82 WD |
104 | static int active_filecnt = 0; |
105 | static OFF_T active_bytecnt = 0; | |
720b47f2 | 106 | |
351e23ad WD |
107 | static char int_byte_extra[64] = { |
108 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (00 - 3F)/4 */ | |
109 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* (40 - 7F)/4 */ | |
110 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* (80 - BF)/4 */ | |
111 | 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6, /* (C0 - FF)/4 */ | |
482f48cc WD |
112 | }; |
113 | ||
29349024 WD |
114 | enum festatus { FES_SUCCESS, FES_REDO, FES_NO_SEND }; |
115 | ||
dde5b772 | 116 | static void readfd(int fd, char *buffer, size_t N); |
8ef246e0 WD |
117 | static void writefd(int fd, const char *buf, size_t len); |
118 | static void writefd_unbuffered(int fd, const char *buf, size_t len); | |
332cf6df | 119 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert); |
ff41a59f | 120 | |
c6816b94 WD |
121 | struct flist_ndx_item { |
122 | struct flist_ndx_item *next; | |
123 | int ndx; | |
d17e1dd2 WD |
124 | }; |
125 | ||
c6816b94 WD |
126 | struct flist_ndx_list { |
127 | struct flist_ndx_item *head, *tail; | |
128 | }; | |
129 | ||
cdf236aa | 130 | static struct flist_ndx_list redo_list, hlink_list; |
d17e1dd2 | 131 | |
08c88178 WD |
132 | struct msg_list_item { |
133 | struct msg_list_item *next; | |
332cf6df | 134 | char convert; |
954bbed8 | 135 | char buf[1]; |
d17e1dd2 WD |
136 | }; |
137 | ||
08c88178 WD |
138 | struct msg_list { |
139 | struct msg_list_item *head, *tail; | |
140 | }; | |
141 | ||
e4c877cf | 142 | static struct msg_list msg_queue; |
d17e1dd2 | 143 | |
c6816b94 | 144 | static void flist_ndx_push(struct flist_ndx_list *lp, int ndx) |
d17e1dd2 | 145 | { |
c6816b94 WD |
146 | struct flist_ndx_item *item; |
147 | ||
148 | if (!(item = new(struct flist_ndx_item))) | |
149 | out_of_memory("flist_ndx_push"); | |
150 | item->next = NULL; | |
151 | item->ndx = ndx; | |
152 | if (lp->tail) | |
153 | lp->tail->next = item; | |
d17e1dd2 | 154 | else |
c6816b94 WD |
155 | lp->head = item; |
156 | lp->tail = item; | |
157 | } | |
158 | ||
159 | static int flist_ndx_pop(struct flist_ndx_list *lp) | |
160 | { | |
161 | struct flist_ndx_item *next; | |
162 | int ndx; | |
163 | ||
164 | if (!lp->head) | |
165 | return -1; | |
166 | ||
167 | ndx = lp->head->ndx; | |
168 | next = lp->head->next; | |
169 | free(lp->head); | |
170 | lp->head = next; | |
171 | if (!next) | |
172 | lp->tail = NULL; | |
173 | ||
174 | return ndx; | |
d17e1dd2 WD |
175 | } |
176 | ||
29349024 WD |
177 | static void got_flist_entry_status(enum festatus status, const char *buf) |
178 | { | |
179 | int ndx = IVAL(buf, 0); | |
180 | struct file_list *flist = flist_for_ndx(ndx); | |
181 | ||
182 | assert(flist != NULL); | |
183 | assert(ndx >= flist->ndx_start); | |
184 | ||
185 | if (remove_source_files) { | |
186 | active_filecnt--; | |
187 | active_bytecnt -= F_LENGTH(flist->files[ndx - flist->ndx_start]); | |
188 | } | |
189 | ||
190 | if (inc_recurse) | |
191 | flist->in_progress--; | |
192 | ||
193 | switch (status) { | |
194 | case FES_SUCCESS: | |
195 | if (remove_source_files) | |
196 | send_msg(MSG_SUCCESS, buf, 4, 0); | |
197 | if (preserve_hard_links) { | |
198 | struct file_struct *file = flist->files[ndx - flist->ndx_start]; | |
199 | if (F_IS_HLINKED(file)) | |
200 | flist_ndx_push(&hlink_list, ndx); | |
201 | } | |
202 | break; | |
203 | case FES_REDO: | |
204 | if (inc_recurse) | |
205 | flist->to_redo++; | |
206 | flist_ndx_push(&redo_list, ndx); | |
207 | break; | |
208 | case FES_NO_SEND: | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
8d9dc9f9 AT |
213 | static void check_timeout(void) |
214 | { | |
215 | time_t t; | |
90ba34e2 | 216 | |
9e2409ab | 217 | if (!io_timeout || ignore_timeout) |
d17e1dd2 | 218 | return; |
8d9dc9f9 | 219 | |
3b0a30eb WD |
220 | if (!last_io_in) { |
221 | last_io_in = time(NULL); | |
8d9dc9f9 AT |
222 | return; |
223 | } | |
224 | ||
225 | t = time(NULL); | |
226 | ||
3b0a30eb | 227 | if (t - last_io_in >= io_timeout) { |
0adb99b9 | 228 | if (!am_server && !am_daemon) { |
4ccfd96c | 229 | rprintf(FERROR, "io timeout after %d seconds -- exiting\n", |
3b0a30eb | 230 | (int)(t-last_io_in)); |
0adb99b9 | 231 | } |
65417579 | 232 | exit_cleanup(RERR_TIMEOUT); |
8d9dc9f9 AT |
233 | } |
234 | } | |
235 | ||
1f75bb10 WD |
236 | /* Note the fds used for the main socket (which might really be a pipe |
237 | * for a local transfer, but we can ignore that). */ | |
238 | void io_set_sock_fds(int f_in, int f_out) | |
239 | { | |
240 | sock_f_in = f_in; | |
241 | sock_f_out = f_out; | |
242 | } | |
243 | ||
3b0a30eb WD |
244 | void set_io_timeout(int secs) |
245 | { | |
246 | io_timeout = secs; | |
247 | ||
248 | if (!io_timeout || io_timeout > SELECT_TIMEOUT) | |
249 | select_timeout = SELECT_TIMEOUT; | |
250 | else | |
251 | select_timeout = io_timeout; | |
252 | ||
253 | allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2; | |
254 | } | |
255 | ||
98f8c9a5 WD |
256 | /* Setup the fd used to receive MSG_* messages. Only needed during the |
257 | * early stages of being a local sender (up through the sending of the | |
258 | * file list) or when we're the generator (to fetch the messages from | |
259 | * the receiver). */ | |
d17e1dd2 WD |
260 | void set_msg_fd_in(int fd) |
261 | { | |
262 | msg_fd_in = fd; | |
263 | } | |
264 | ||
98f8c9a5 WD |
265 | /* Setup the fd used to send our MSG_* messages. Only needed when |
266 | * we're the receiver (to send our messages to the generator). */ | |
d17e1dd2 WD |
267 | void set_msg_fd_out(int fd) |
268 | { | |
269 | msg_fd_out = fd; | |
270 | set_nonblocking(msg_fd_out); | |
271 | } | |
272 | ||
273 | /* Add a message to the pending MSG_* list. */ | |
332cf6df | 274 | static void msg_list_add(struct msg_list *lst, int code, const char *buf, int len, int convert) |
554e0a8d | 275 | { |
954bbed8 WD |
276 | struct msg_list_item *m; |
277 | int sz = len + 4 + sizeof m[0] - 1; | |
d17e1dd2 | 278 | |
954bbed8 | 279 | if (!(m = (struct msg_list_item *)new_array(char, sz))) |
c6816b94 | 280 | out_of_memory("msg_list_add"); |
954bbed8 | 281 | m->next = NULL; |
332cf6df | 282 | m->convert = convert; |
954bbed8 WD |
283 | SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len); |
284 | memcpy(m->buf + 4, buf, len); | |
285 | if (lst->tail) | |
286 | lst->tail->next = m; | |
d17e1dd2 | 287 | else |
954bbed8 WD |
288 | lst->head = m; |
289 | lst->tail = m; | |
554e0a8d AT |
290 | } |
291 | ||
e4c877cf | 292 | static void msg_flush(void) |
3be97bf9 | 293 | { |
e4c877cf WD |
294 | if (am_generator) { |
295 | while (msg_queue.head && io_multiplexing_out) { | |
296 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
297 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
298 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
299 | if (!(msg_queue.head = m->next)) |
300 | msg_queue.tail = NULL; | |
332cf6df | 301 | stats.total_written += len + 4; |
e4c877cf | 302 | defer_forwarding_messages++; |
332cf6df | 303 | mplex_write(sock_f_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
304 | defer_forwarding_messages--; |
305 | free(m); | |
306 | } | |
307 | } else { | |
308 | while (msg_queue.head) { | |
309 | struct msg_list_item *m = msg_queue.head; | |
332cf6df WD |
310 | int len = IVAL(m->buf, 0) & 0xFFFFFF; |
311 | int tag = *((uchar*)m->buf+3) - MPLEX_BASE; | |
e4c877cf WD |
312 | if (!(msg_queue.head = m->next)) |
313 | msg_queue.tail = NULL; | |
314 | defer_forwarding_messages++; | |
332cf6df | 315 | mplex_write(msg_fd_out, tag, m->buf + 4, len, m->convert); |
e4c877cf WD |
316 | defer_forwarding_messages--; |
317 | free(m); | |
318 | } | |
3be97bf9 WD |
319 | } |
320 | } | |
321 | ||
98f8c9a5 WD |
322 | /* Read a message from the MSG_* fd and handle it. This is called either |
323 | * during the early stages of being a local sender (up through the sending | |
324 | * of the file list) or when we're the generator (to fetch the messages | |
325 | * from the receiver). */ | |
d17e1dd2 | 326 | static void read_msg_fd(void) |
554e0a8d | 327 | { |
f9c6b3e7 | 328 | char buf[2048]; |
06ce139f | 329 | size_t n; |
8ef246e0 | 330 | struct file_list *flist; |
d17e1dd2 | 331 | int fd = msg_fd_in; |
ff41a59f AT |
332 | int tag, len; |
333 | ||
00bdf899 | 334 | /* Temporarily disable msg_fd_in. This is needed to avoid looping back |
af436313 | 335 | * to this routine from writefd_unbuffered(). */ |
3be97bf9 | 336 | no_flush++; |
d17e1dd2 | 337 | msg_fd_in = -1; |
be21e29c | 338 | defer_forwarding_messages++; |
554e0a8d | 339 | |
dde5b772 | 340 | readfd(fd, buf, 4); |
ff41a59f AT |
341 | tag = IVAL(buf, 0); |
342 | ||
343 | len = tag & 0xFFFFFF; | |
d17e1dd2 | 344 | tag = (tag >> 24) - MPLEX_BASE; |
ff41a59f | 345 | |
d17e1dd2 WD |
346 | switch (tag) { |
347 | case MSG_DONE: | |
cc7b86bf | 348 | if (len < 0 || len > 1 || !am_generator) { |
8ef246e0 WD |
349 | invalid_msg: |
350 | rprintf(FERROR, "invalid message %d:%d [%s%s]\n", | |
351 | tag, len, who_am_i(), | |
3ea6e0e7 | 352 | inc_recurse ? "/inc" : ""); |
d17e1dd2 | 353 | exit_cleanup(RERR_STREAMIO); |
13c7bcbb | 354 | } |
cc7b86bf WD |
355 | if (len) { |
356 | readfd(fd, buf, len); | |
351e23ad | 357 | stats.total_read = read_varlong(fd, 3); |
cc7b86bf | 358 | } |
04c722d5 | 359 | msgdone_cnt++; |
d17e1dd2 WD |
360 | break; |
361 | case MSG_REDO: | |
8ef246e0 WD |
362 | if (len != 4 || !am_generator) |
363 | goto invalid_msg; | |
dde5b772 | 364 | readfd(fd, buf, 4); |
29349024 | 365 | got_flist_entry_status(FES_REDO, buf); |
8ef246e0 WD |
366 | break; |
367 | case MSG_FLIST: | |
3ea6e0e7 | 368 | if (len != 4 || !am_generator || !inc_recurse) |
8ef246e0 | 369 | goto invalid_msg; |
dde5b772 | 370 | readfd(fd, buf, 4); |
8ef246e0 WD |
371 | /* Read extra file list from receiver. */ |
372 | assert(iobuf_in != NULL); | |
373 | assert(iobuf_f_in == fd); | |
1faa1a6d WD |
374 | if (verbose > 3) { |
375 | rprintf(FINFO, "[%s] receiving flist for dir %d\n", | |
376 | who_am_i(), IVAL(buf,0)); | |
377 | } | |
8ef246e0 WD |
378 | flist = recv_file_list(fd); |
379 | flist->parent_ndx = IVAL(buf,0); | |
380 | break; | |
381 | case MSG_FLIST_EOF: | |
3ea6e0e7 | 382 | if (len != 0 || !am_generator || !inc_recurse) |
8ef246e0 WD |
383 | goto invalid_msg; |
384 | flist_eof = 1; | |
d17e1dd2 | 385 | break; |
0d67e00a | 386 | case MSG_DELETED: |
8ef246e0 WD |
387 | if (len >= (int)sizeof buf || !am_generator) |
388 | goto invalid_msg; | |
dde5b772 | 389 | readfd(fd, buf, len); |
332cf6df | 390 | send_msg(MSG_DELETED, buf, len, 1); |
0d67e00a | 391 | break; |
9981c27e | 392 | case MSG_SUCCESS: |
8ef246e0 WD |
393 | if (len != 4 || !am_generator) |
394 | goto invalid_msg; | |
29349024 WD |
395 | readfd(fd, buf, 4); |
396 | got_flist_entry_status(FES_SUCCESS, buf); | |
8ef246e0 WD |
397 | break; |
398 | case MSG_NO_SEND: | |
399 | if (len != 4 || !am_generator) | |
400 | goto invalid_msg; | |
29349024 WD |
401 | readfd(fd, buf, 4); |
402 | got_flist_entry_status(FES_NO_SEND, buf); | |
9981c27e | 403 | break; |
72f2d1b3 | 404 | case MSG_SOCKERR: |
64119c79 | 405 | case MSG_CLIENT: |
8ef246e0 WD |
406 | if (!am_generator) |
407 | goto invalid_msg; | |
64119c79 | 408 | if (tag == MSG_SOCKERR) |
8ef246e0 | 409 | io_end_multiplex_out(); |
72f2d1b3 | 410 | /* FALL THROUGH */ |
d17e1dd2 WD |
411 | case MSG_INFO: |
412 | case MSG_ERROR: | |
413 | case MSG_LOG: | |
414 | while (len) { | |
415 | n = len; | |
416 | if (n >= sizeof buf) | |
417 | n = sizeof buf - 1; | |
dde5b772 | 418 | readfd(fd, buf, n); |
332cf6df | 419 | rwrite((enum logcode)tag, buf, n, !am_generator); |
d17e1dd2 WD |
420 | len -= n; |
421 | } | |
422 | break; | |
423 | default: | |
f8b9da1a WD |
424 | rprintf(FERROR, "unknown message %d:%d [%s]\n", |
425 | tag, len, who_am_i()); | |
d17e1dd2 WD |
426 | exit_cleanup(RERR_STREAMIO); |
427 | } | |
428 | ||
3be97bf9 | 429 | no_flush--; |
d17e1dd2 | 430 | msg_fd_in = fd; |
3be97bf9 | 431 | if (!--defer_forwarding_messages) |
e4c877cf | 432 | msg_flush(); |
d17e1dd2 WD |
433 | } |
434 | ||
d6081c82 | 435 | /* This is used by the generator to limit how many file transfers can |
47c11975 | 436 | * be active at once when --remove-source-files is specified. Without |
d6081c82 WD |
437 | * this, sender-side deletions were mostly happening at the end. */ |
438 | void increment_active_files(int ndx, int itemizing, enum logcode code) | |
439 | { | |
440 | /* TODO: tune these limits? */ | |
5b986297 | 441 | while (active_filecnt >= (active_bytecnt >= 128*1024 ? 10 : 50)) { |
04c722d5 WD |
442 | check_for_finished_files(itemizing, code, 0); |
443 | if (iobuf_out_cnt) | |
444 | io_flush(NORMAL_FLUSH); | |
445 | else | |
446 | read_msg_fd(); | |
d6081c82 WD |
447 | } |
448 | ||
449 | active_filecnt++; | |
121bfb2b | 450 | active_bytecnt += F_LENGTH(cur_flist->files[ndx - cur_flist->ndx_start]); |
d6081c82 WD |
451 | } |
452 | ||
3be97bf9 | 453 | /* Write an message to a multiplexed stream. If this fails, rsync exits. */ |
332cf6df | 454 | static void mplex_write(int fd, enum msgcode code, const char *buf, size_t len, int convert) |
d17e1dd2 | 455 | { |
332cf6df | 456 | char buffer[BIGPATHBUFLEN]; /* Oversized for use by iconv code. */ |
3be97bf9 | 457 | size_t n = len; |
d17e1dd2 | 458 | |
3be97bf9 WD |
459 | SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len); |
460 | ||
332cf6df WD |
461 | #ifdef ICONV_OPTION |
462 | if (convert && ic_send == (iconv_t)-1) | |
463 | #endif | |
464 | convert = 0; | |
465 | ||
466 | if (convert || n > 1024 - 4) /* BIGPATHBUFLEN can handle 1024 bytes */ | |
3be97bf9 WD |
467 | n = 0; |
468 | else | |
469 | memcpy(buffer + 4, buf, n); | |
470 | ||
471 | writefd_unbuffered(fd, buffer, n+4); | |
472 | ||
473 | len -= n; | |
474 | buf += n; | |
475 | ||
332cf6df WD |
476 | #ifdef ICONV_OPTION |
477 | if (convert) { | |
478 | iconv(ic_send, NULL, 0, NULL, 0); | |
479 | defer_forwarding_messages++; | |
480 | while (len) { | |
481 | ICONV_CONST char *ibuf = (ICONV_CONST char *)buf; | |
482 | char *obuf = buffer; | |
483 | size_t ocnt = sizeof buffer; | |
484 | while (len && iconv(ic_send, &ibuf,&len, | |
485 | &obuf,&ocnt) == (size_t)-1) { | |
486 | if (errno == E2BIG || !ocnt) | |
487 | break; | |
488 | *obuf++ = *ibuf++; | |
489 | ocnt--, len--; | |
490 | } | |
491 | n = obuf - buffer; | |
492 | writefd_unbuffered(fd, buffer, n); | |
493 | } | |
494 | if (!--defer_forwarding_messages) | |
495 | msg_flush(); | |
496 | } else | |
497 | #endif | |
3be97bf9 WD |
498 | if (len) { |
499 | defer_forwarding_messages++; | |
500 | writefd_unbuffered(fd, buf, len); | |
501 | if (!--defer_forwarding_messages) | |
e4c877cf | 502 | msg_flush(); |
8ef246e0 | 503 | } |
d17e1dd2 WD |
504 | } |
505 | ||
332cf6df | 506 | int send_msg(enum msgcode code, const char *buf, int len, int convert) |
37f35d89 WD |
507 | { |
508 | if (msg_fd_out < 0) { | |
12ccc73a | 509 | if (!defer_forwarding_messages) |
332cf6df | 510 | return io_multiplex_write(code, buf, len, convert); |
12ccc73a WD |
511 | if (!io_multiplexing_out) |
512 | return 0; | |
332cf6df | 513 | msg_list_add(&msg_queue, code, buf, len, convert); |
12ccc73a | 514 | return 1; |
37f35d89 | 515 | } |
e4c877cf | 516 | if (flist_forward_from >= 0) |
332cf6df | 517 | msg_list_add(&msg_queue, code, buf, len, convert); |
e4c877cf | 518 | else |
332cf6df | 519 | mplex_write(msg_fd_out, code, buf, len, convert); |
12ccc73a | 520 | return 1; |
37f35d89 WD |
521 | } |
522 | ||
155d9206 WD |
523 | void send_msg_int(enum msgcode code, int num) |
524 | { | |
525 | char numbuf[4]; | |
526 | SIVAL(numbuf, 0, num); | |
332cf6df | 527 | send_msg(code, numbuf, 4, 0); |
155d9206 WD |
528 | } |
529 | ||
8ef246e0 | 530 | void wait_for_receiver(void) |
d17e1dd2 | 531 | { |
2a5df862 WD |
532 | if (iobuf_out_cnt) |
533 | io_flush(NORMAL_FLUSH); | |
534 | else | |
535 | read_msg_fd(); | |
8ef246e0 | 536 | } |
554e0a8d | 537 | |
8ef246e0 WD |
538 | int get_redo_num(void) |
539 | { | |
c6816b94 | 540 | return flist_ndx_pop(&redo_list); |
554e0a8d AT |
541 | } |
542 | ||
cdf236aa WD |
543 | int get_hlink_num(void) |
544 | { | |
545 | return flist_ndx_pop(&hlink_list); | |
546 | } | |
547 | ||
56014c8c WD |
548 | /** |
549 | * When we're the receiver and we have a local --files-from list of names | |
550 | * that needs to be sent over the socket to the sender, we have to do two | |
551 | * things at the same time: send the sender a list of what files we're | |
552 | * processing and read the incoming file+info list from the sender. We do | |
553 | * this by augmenting the read_timeout() function to copy this data. It | |
554 | * uses the io_filesfrom_buf to read a block of data from f_in (when it is | |
555 | * ready, since it might be a pipe) and then blast it out f_out (when it | |
556 | * is ready to receive more data). | |
557 | */ | |
558 | void io_set_filesfrom_fds(int f_in, int f_out) | |
559 | { | |
560 | io_filesfrom_f_in = f_in; | |
561 | io_filesfrom_f_out = f_out; | |
562 | io_filesfrom_bp = io_filesfrom_buf; | |
563 | io_filesfrom_lastchar = '\0'; | |
564 | io_filesfrom_buflen = 0; | |
565 | } | |
720b47f2 | 566 | |
cb2e1f18 WD |
567 | /* It's almost always an error to get an EOF when we're trying to read from the |
568 | * network, because the protocol is (for the most part) self-terminating. | |
880da007 | 569 | * |
cb2e1f18 WD |
570 | * There is one case for the receiver when it is at the end of the transfer |
571 | * (hanging around reading any keep-alive packets that might come its way): if | |
572 | * the sender dies before the generator's kill-signal comes through, we can end | |
573 | * up here needing to loop until the kill-signal arrives. In this situation, | |
574 | * kluge_around_eof will be < 0. | |
575 | * | |
576 | * There is another case for older protocol versions (< 24) where the module | |
577 | * listing was not terminated, so we must ignore an EOF error in that case and | |
578 | * exit. In this situation, kluge_around_eof will be > 0. */ | |
1f75bb10 | 579 | static void whine_about_eof(int fd) |
7a55d06e | 580 | { |
574c2500 | 581 | if (kluge_around_eof && fd == sock_f_in) { |
55bb7fff | 582 | int i; |
574c2500 WD |
583 | if (kluge_around_eof > 0) |
584 | exit_cleanup(0); | |
55bb7fff WD |
585 | /* If we're still here after 10 seconds, exit with an error. */ |
586 | for (i = 10*1000/20; i--; ) | |
574c2500 WD |
587 | msleep(20); |
588 | } | |
3151cbae | 589 | |
00bdf899 | 590 | rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed " |
dca68b0a WD |
591 | "(%.0f bytes received so far) [%s]\n", |
592 | (double)stats.total_read, who_am_i()); | |
00bdf899 WD |
593 | |
594 | exit_cleanup(RERR_STREAMIO); | |
7a55d06e | 595 | } |
720b47f2 | 596 | |
880da007 | 597 | /** |
6ed6d7f5 | 598 | * Read from a socket with I/O timeout. return the number of bytes |
c3563c46 MP |
599 | * read. If no bytes can be read then exit, never return a number <= 0. |
600 | * | |
8886f8d0 MP |
601 | * TODO: If the remote shell connection fails, then current versions |
602 | * actually report an "unexpected EOF" error here. Since it's a | |
603 | * fairly common mistake to try to use rsh when ssh is required, we | |
604 | * should trap that: if we fail to read any data at all, we should | |
605 | * give a better explanation. We can tell whether the connection has | |
606 | * started by looking e.g. at whether the remote version is known yet. | |
c3563c46 | 607 | */ |
3151cbae | 608 | static int read_timeout(int fd, char *buf, size_t len) |
8d9dc9f9 | 609 | { |
d8aeda1e | 610 | int n, cnt = 0; |
4c36ddbe | 611 | |
dde5b772 | 612 | io_flush(FULL_FLUSH); |
ea2111d1 | 613 | |
d8aeda1e | 614 | while (cnt == 0) { |
7a55d06e | 615 | /* until we manage to read *something* */ |
56014c8c | 616 | fd_set r_fds, w_fds; |
4c36ddbe | 617 | struct timeval tv; |
1ea087a7 | 618 | int maxfd = fd; |
a57873b7 | 619 | int count; |
4c36ddbe | 620 | |
56014c8c | 621 | FD_ZERO(&r_fds); |
a7026ba9 | 622 | FD_ZERO(&w_fds); |
56014c8c | 623 | FD_SET(fd, &r_fds); |
3309507d | 624 | if (io_filesfrom_f_out >= 0) { |
56014c8c WD |
625 | int new_fd; |
626 | if (io_filesfrom_buflen == 0) { | |
3309507d | 627 | if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
628 | FD_SET(io_filesfrom_f_in, &r_fds); |
629 | new_fd = io_filesfrom_f_in; | |
630 | } else { | |
631 | io_filesfrom_f_out = -1; | |
632 | new_fd = -1; | |
633 | } | |
634 | } else { | |
56014c8c WD |
635 | FD_SET(io_filesfrom_f_out, &w_fds); |
636 | new_fd = io_filesfrom_f_out; | |
637 | } | |
1ea087a7 WD |
638 | if (new_fd > maxfd) |
639 | maxfd = new_fd; | |
554e0a8d AT |
640 | } |
641 | ||
e626b29e | 642 | tv.tv_sec = select_timeout; |
4c36ddbe AT |
643 | tv.tv_usec = 0; |
644 | ||
554e0a8d AT |
645 | errno = 0; |
646 | ||
a7026ba9 | 647 | count = select(maxfd + 1, &r_fds, &w_fds, NULL, &tv); |
a57873b7 | 648 | |
a57873b7 | 649 | if (count <= 0) { |
2a5df862 WD |
650 | if (errno == EBADF) { |
651 | defer_forwarding_messages = 0; | |
554e0a8d | 652 | exit_cleanup(RERR_SOCKETIO); |
2a5df862 | 653 | } |
bd717af8 | 654 | check_timeout(); |
4c36ddbe AT |
655 | continue; |
656 | } | |
657 | ||
3309507d | 658 | if (io_filesfrom_f_out >= 0) { |
56014c8c WD |
659 | if (io_filesfrom_buflen) { |
660 | if (FD_ISSET(io_filesfrom_f_out, &w_fds)) { | |
661 | int l = write(io_filesfrom_f_out, | |
662 | io_filesfrom_bp, | |
663 | io_filesfrom_buflen); | |
664 | if (l > 0) { | |
665 | if (!(io_filesfrom_buflen -= l)) | |
666 | io_filesfrom_bp = io_filesfrom_buf; | |
667 | else | |
668 | io_filesfrom_bp += l; | |
47cffb77 | 669 | } else if (errno != EINTR) { |
56014c8c WD |
670 | /* XXX should we complain? */ |
671 | io_filesfrom_f_out = -1; | |
672 | } | |
673 | } | |
3309507d | 674 | } else if (io_filesfrom_f_in >= 0) { |
56014c8c WD |
675 | if (FD_ISSET(io_filesfrom_f_in, &r_fds)) { |
676 | int l = read(io_filesfrom_f_in, | |
677 | io_filesfrom_buf, | |
678 | sizeof io_filesfrom_buf); | |
679 | if (l <= 0) { | |
47cffb77 WD |
680 | if (l == 0 || errno != EINTR) { |
681 | /* Send end-of-file marker */ | |
682 | io_filesfrom_buf[0] = '\0'; | |
683 | io_filesfrom_buf[1] = '\0'; | |
684 | io_filesfrom_buflen = io_filesfrom_lastchar? 2 : 1; | |
685 | io_filesfrom_f_in = -1; | |
686 | } | |
56014c8c | 687 | } else { |
56014c8c WD |
688 | if (!eol_nulls) { |
689 | char *s = io_filesfrom_buf + l; | |
690 | /* Transform CR and/or LF into '\0' */ | |
691 | while (s-- > io_filesfrom_buf) { | |
692 | if (*s == '\n' || *s == '\r') | |
693 | *s = '\0'; | |
694 | } | |
695 | } | |
696 | if (!io_filesfrom_lastchar) { | |
697 | /* Last buf ended with a '\0', so don't | |
698 | * let this buf start with one. */ | |
699 | while (l && !*io_filesfrom_bp) | |
700 | io_filesfrom_bp++, l--; | |
701 | } | |
702 | if (!l) | |
703 | io_filesfrom_bp = io_filesfrom_buf; | |
704 | else { | |
705 | char *f = io_filesfrom_bp; | |
706 | char *t = f; | |
707 | char *eob = f + l; | |
708 | /* Eliminate any multi-'\0' runs. */ | |
709 | while (f != eob) { | |
710 | if (!(*t++ = *f++)) { | |
711 | while (f != eob && !*f) | |
712 | f++, l--; | |
713 | } | |
714 | } | |
715 | io_filesfrom_lastchar = f[-1]; | |
716 | } | |
717 | io_filesfrom_buflen = l; | |
718 | } | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
f89b9368 WD |
723 | if (!FD_ISSET(fd, &r_fds)) |
724 | continue; | |
554e0a8d | 725 | |
4c36ddbe AT |
726 | n = read(fd, buf, len); |
727 | ||
1ea087a7 WD |
728 | if (n <= 0) { |
729 | if (n == 0) | |
1f75bb10 | 730 | whine_about_eof(fd); /* Doesn't return. */ |
d62bcc17 WD |
731 | if (errno == EINTR || errno == EWOULDBLOCK |
732 | || errno == EAGAIN) | |
7a55d06e | 733 | continue; |
1f75bb10 WD |
734 | |
735 | /* Don't write errors on a dead socket. */ | |
72f2d1b3 | 736 | if (fd == sock_f_in) { |
8ef246e0 | 737 | io_end_multiplex_out(); |
72f2d1b3 WD |
738 | rsyserr(FSOCKERR, errno, "read error"); |
739 | } else | |
740 | rsyserr(FERROR, errno, "read error"); | |
1f75bb10 | 741 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 742 | } |
00bdf899 WD |
743 | |
744 | buf += n; | |
745 | len -= n; | |
d8aeda1e | 746 | cnt += n; |
1f75bb10 | 747 | |
3b0a30eb WD |
748 | if (fd == sock_f_in && io_timeout) |
749 | last_io_in = time(NULL); | |
4c36ddbe | 750 | } |
8d9dc9f9 | 751 | |
d8aeda1e | 752 | return cnt; |
4c36ddbe | 753 | } |
8d9dc9f9 | 754 | |
67b8f3df WD |
755 | /* Read a line into the "buf" buffer. */ |
756 | int read_line(int fd, char *buf, size_t bufsiz, int dump_comments, int rl_nulls) | |
56014c8c | 757 | { |
67b8f3df | 758 | char ch, *s, *eob = buf + bufsiz - 1; |
56014c8c | 759 | int cnt; |
56014c8c WD |
760 | |
761 | start: | |
67b8f3df | 762 | s = buf; |
56014c8c WD |
763 | while (1) { |
764 | cnt = read(fd, &ch, 1); | |
765 | if (cnt < 0 && (errno == EWOULDBLOCK | |
766 | || errno == EINTR || errno == EAGAIN)) { | |
767 | struct timeval tv; | |
6c850772 WD |
768 | fd_set r_fds, e_fds; |
769 | FD_ZERO(&r_fds); | |
770 | FD_SET(fd, &r_fds); | |
771 | FD_ZERO(&e_fds); | |
772 | FD_SET(fd, &e_fds); | |
e626b29e | 773 | tv.tv_sec = select_timeout; |
56014c8c | 774 | tv.tv_usec = 0; |
6c850772 | 775 | if (!select(fd+1, &r_fds, NULL, &e_fds, &tv)) |
56014c8c | 776 | check_timeout(); |
35c8fd76 WD |
777 | /*if (FD_ISSET(fd, &e_fds)) |
778 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
56014c8c WD |
779 | continue; |
780 | } | |
781 | if (cnt != 1) | |
782 | break; | |
67b8f3df WD |
783 | if (rl_nulls ? ch == '\0' : (ch == '\r' || ch == '\n')) { |
784 | /* Skip empty lines if dumping comments. */ | |
785 | if (dump_comments && s == buf) | |
56014c8c WD |
786 | continue; |
787 | break; | |
788 | } | |
789 | if (s < eob) | |
790 | *s++ = ch; | |
791 | } | |
792 | *s = '\0'; | |
7a55d06e | 793 | |
67b8f3df | 794 | if (dump_comments && (*buf == '#' || *buf == ';')) |
56014c8c WD |
795 | goto start; |
796 | ||
67b8f3df WD |
797 | return s - buf; |
798 | } | |
799 | ||
800 | int read_args(int f_in, char *mod_name, char *buf, size_t bufsiz, int rl_nulls, | |
801 | char ***argv_p, int *argc_p, char **request_p) | |
802 | { | |
803 | int maxargs = MAX_ARGS; | |
804 | int dot_pos = 0; | |
805 | int argc = 0; | |
806 | char **argv, *p; | |
807 | ||
808 | if (!(argv = new_array(char *, maxargs))) | |
809 | out_of_memory("read_args"); | |
810 | if (mod_name) | |
811 | argv[argc++] = "rsyncd"; | |
812 | ||
813 | while (1) { | |
814 | if (read_line(f_in, buf, bufsiz, 0, rl_nulls) == 0) | |
815 | break; | |
816 | ||
817 | if (argc == maxargs) { | |
818 | maxargs += MAX_ARGS; | |
819 | if (!(argv = realloc_array(argv, char *, maxargs))) | |
820 | out_of_memory("read_args"); | |
821 | } | |
822 | ||
823 | if (dot_pos) { | |
824 | if (request_p) { | |
825 | *request_p = strdup(buf); | |
826 | request_p = NULL; | |
827 | } | |
828 | if (mod_name) | |
829 | glob_expand_module(mod_name, buf, &argv, &argc, &maxargs); | |
830 | else | |
831 | glob_expand(buf, &argv, &argc, &maxargs); | |
832 | } else { | |
833 | if (!(p = strdup(buf))) | |
834 | out_of_memory("read_args"); | |
835 | argv[argc++] = p; | |
836 | if (*p == '.' && p[1] == '\0') | |
837 | dot_pos = argc; | |
838 | } | |
839 | } | |
840 | ||
841 | *argc_p = argc; | |
842 | *argv_p = argv; | |
843 | ||
844 | return dot_pos ? dot_pos : argc; | |
56014c8c | 845 | } |
7a55d06e | 846 | |
8ef246e0 | 847 | int io_start_buffering_out(int f_out) |
1f75bb10 | 848 | { |
8ef246e0 WD |
849 | if (iobuf_out) { |
850 | assert(f_out == iobuf_f_out); | |
851 | return 0; | |
852 | } | |
1f75bb10 WD |
853 | if (!(iobuf_out = new_array(char, IO_BUFFER_SIZE))) |
854 | out_of_memory("io_start_buffering_out"); | |
855 | iobuf_out_cnt = 0; | |
8ef246e0 WD |
856 | iobuf_f_out = f_out; |
857 | return 1; | |
1f75bb10 WD |
858 | } |
859 | ||
8ef246e0 | 860 | int io_start_buffering_in(int f_in) |
1f75bb10 | 861 | { |
8ef246e0 WD |
862 | if (iobuf_in) { |
863 | assert(f_in == iobuf_f_in); | |
864 | return 0; | |
865 | } | |
1f75bb10 WD |
866 | iobuf_in_siz = 2 * IO_BUFFER_SIZE; |
867 | if (!(iobuf_in = new_array(char, iobuf_in_siz))) | |
868 | out_of_memory("io_start_buffering_in"); | |
8ef246e0 WD |
869 | iobuf_f_in = f_in; |
870 | return 1; | |
1f75bb10 WD |
871 | } |
872 | ||
8ef246e0 | 873 | void io_end_buffering_in(void) |
1f75bb10 | 874 | { |
8ef246e0 WD |
875 | if (!iobuf_in) |
876 | return; | |
877 | free(iobuf_in); | |
878 | iobuf_in = NULL; | |
879 | iobuf_in_ndx = 0; | |
880 | iobuf_in_remaining = 0; | |
881 | iobuf_f_in = -1; | |
882 | } | |
883 | ||
884 | void io_end_buffering_out(void) | |
885 | { | |
886 | if (!iobuf_out) | |
887 | return; | |
888 | io_flush(FULL_FLUSH); | |
889 | free(iobuf_out); | |
890 | iobuf_out = NULL; | |
891 | iobuf_f_out = -1; | |
1f75bb10 WD |
892 | } |
893 | ||
be91bd81 | 894 | void maybe_flush_socket(int important) |
626bec8e | 895 | { |
be91bd81 WD |
896 | if (iobuf_out && iobuf_out_cnt |
897 | && (important || time(NULL) - last_io_out >= 5)) | |
626bec8e WD |
898 | io_flush(NORMAL_FLUSH); |
899 | } | |
900 | ||
cdf236aa | 901 | void maybe_send_keepalive(void) |
9e2409ab | 902 | { |
3b0a30eb | 903 | if (time(NULL) - last_io_out >= allowed_lull) { |
9e2409ab | 904 | if (!iobuf_out || !iobuf_out_cnt) { |
3221f451 WD |
905 | if (protocol_version < 29) |
906 | return; /* there's nothing we can do */ | |
8ef246e0 | 907 | if (protocol_version >= 30) |
332cf6df | 908 | send_msg(MSG_NOOP, "", 0, 0); |
8ef246e0 | 909 | else { |
9decb4d2 | 910 | write_int(sock_f_out, cur_flist->used); |
8ef246e0 WD |
911 | write_shortint(sock_f_out, ITEM_IS_NEW); |
912 | } | |
9e2409ab WD |
913 | } |
914 | if (iobuf_out) | |
915 | io_flush(NORMAL_FLUSH); | |
916 | } | |
917 | } | |
918 | ||
8ef246e0 WD |
919 | void start_flist_forward(int f_in) |
920 | { | |
921 | assert(iobuf_out != NULL); | |
922 | assert(iobuf_f_out == msg_fd_out); | |
923 | flist_forward_from = f_in; | |
924 | } | |
925 | ||
926 | void stop_flist_forward() | |
927 | { | |
8ef246e0 | 928 | flist_forward_from = -1; |
dde5b772 | 929 | io_flush(FULL_FLUSH); |
8ef246e0 WD |
930 | } |
931 | ||
880da007 MP |
932 | /** |
933 | * Continue trying to read len bytes - don't return until len has been | |
934 | * read. | |
935 | **/ | |
3151cbae | 936 | static void read_loop(int fd, char *buf, size_t len) |
4c36ddbe AT |
937 | { |
938 | while (len) { | |
939 | int n = read_timeout(fd, buf, len); | |
940 | ||
941 | buf += n; | |
942 | len -= n; | |
8d9dc9f9 AT |
943 | } |
944 | } | |
945 | ||
7a55d06e MP |
946 | /** |
947 | * Read from the file descriptor handling multiplexing - return number | |
948 | * of bytes read. | |
d62bcc17 WD |
949 | * |
950 | * Never returns <= 0. | |
7a55d06e | 951 | */ |
c399d22a | 952 | static int readfd_unbuffered(int fd, char *buf, size_t len) |
8d9dc9f9 | 953 | { |
f2a4853c | 954 | size_t msg_bytes; |
d8aeda1e | 955 | int tag, cnt = 0; |
33544bf4 | 956 | char line[BIGPATHBUFLEN]; |
8d9dc9f9 | 957 | |
8ef246e0 | 958 | if (!iobuf_in || fd != iobuf_f_in) |
4c36ddbe | 959 | return read_timeout(fd, buf, len); |
8d9dc9f9 | 960 | |
8ef246e0 WD |
961 | if (!io_multiplexing_in && iobuf_in_remaining == 0) { |
962 | iobuf_in_remaining = read_timeout(fd, iobuf_in, iobuf_in_siz); | |
1f75bb10 | 963 | iobuf_in_ndx = 0; |
76c21947 WD |
964 | } |
965 | ||
d8aeda1e | 966 | while (cnt == 0) { |
8ef246e0 WD |
967 | if (iobuf_in_remaining) { |
968 | len = MIN(len, iobuf_in_remaining); | |
1f75bb10 WD |
969 | memcpy(buf, iobuf_in + iobuf_in_ndx, len); |
970 | iobuf_in_ndx += len; | |
8ef246e0 | 971 | iobuf_in_remaining -= len; |
d8aeda1e | 972 | cnt = len; |
76c21947 | 973 | break; |
8d9dc9f9 AT |
974 | } |
975 | ||
909ce14f | 976 | read_loop(fd, line, 4); |
ff41a59f | 977 | tag = IVAL(line, 0); |
679e7657 | 978 | |
f2a4853c | 979 | msg_bytes = tag & 0xFFFFFF; |
d17e1dd2 | 980 | tag = (tag >> 24) - MPLEX_BASE; |
8d9dc9f9 | 981 | |
d17e1dd2 WD |
982 | switch (tag) { |
983 | case MSG_DATA: | |
f2a4853c | 984 | if (msg_bytes > iobuf_in_siz) { |
1f75bb10 | 985 | if (!(iobuf_in = realloc_array(iobuf_in, char, |
f2a4853c | 986 | msg_bytes))) |
c399d22a | 987 | out_of_memory("readfd_unbuffered"); |
f2a4853c | 988 | iobuf_in_siz = msg_bytes; |
76c21947 | 989 | } |
f2a4853c | 990 | read_loop(fd, iobuf_in, msg_bytes); |
8ef246e0 | 991 | iobuf_in_remaining = msg_bytes; |
1f75bb10 | 992 | iobuf_in_ndx = 0; |
d17e1dd2 | 993 | break; |
8ef246e0 WD |
994 | case MSG_NOOP: |
995 | if (am_sender) | |
996 | maybe_send_keepalive(); | |
997 | break; | |
998 | case MSG_IO_ERROR: | |
999 | if (msg_bytes != 4) | |
1000 | goto invalid_msg; | |
1001 | read_loop(fd, line, msg_bytes); | |
1002 | io_error |= IVAL(line, 0); | |
1003 | break; | |
0d67e00a | 1004 | case MSG_DELETED: |
f2a4853c WD |
1005 | if (msg_bytes >= sizeof line) |
1006 | goto overflow; | |
332cf6df WD |
1007 | #ifdef ICONV_OPTION |
1008 | if (ic_recv != (iconv_t)-1) { | |
1009 | ICONV_CONST char *ibuf; | |
1010 | char *obuf = line; | |
1011 | size_t icnt, ocnt = sizeof line - 1; | |
1012 | int add_null = 0; | |
1013 | iconv(ic_send, NULL, 0, NULL, 0); | |
1014 | while (msg_bytes) { | |
1015 | icnt = msg_bytes > sizeof iconv_buf | |
1016 | ? sizeof iconv_buf : msg_bytes; | |
1017 | read_loop(fd, iconv_buf, icnt); | |
1018 | if (!(msg_bytes -= icnt) && !iconv_buf[icnt-1]) | |
1019 | icnt--, add_null = 1; | |
1020 | ibuf = (ICONV_CONST char *)iconv_buf; | |
1021 | if (iconv(ic_send, &ibuf,&icnt, | |
1022 | &obuf,&ocnt) == (size_t)-1) | |
1023 | goto overflow; // XXX | |
1024 | } | |
1025 | if (add_null) | |
1026 | *obuf++ = '\0'; | |
1027 | msg_bytes = obuf - line; | |
1028 | } else | |
1029 | #endif | |
1030 | read_loop(fd, line, msg_bytes); | |
0d67e00a | 1031 | /* A directory name was sent with the trailing null */ |
f2a4853c | 1032 | if (msg_bytes > 0 && !line[msg_bytes-1]) |
0d67e00a | 1033 | log_delete(line, S_IFDIR); |
12bda6f7 WD |
1034 | else { |
1035 | line[msg_bytes] = '\0'; | |
0d67e00a | 1036 | log_delete(line, S_IFREG); |
12bda6f7 | 1037 | } |
0d67e00a | 1038 | break; |
9981c27e | 1039 | case MSG_SUCCESS: |
f2a4853c | 1040 | if (msg_bytes != 4) { |
8ef246e0 | 1041 | invalid_msg: |
cdf236aa | 1042 | rprintf(FERROR, "invalid multi-message %d:%ld [%s]\n", |
f2a4853c | 1043 | tag, (long)msg_bytes, who_am_i()); |
9981c27e WD |
1044 | exit_cleanup(RERR_STREAMIO); |
1045 | } | |
f2a4853c | 1046 | read_loop(fd, line, msg_bytes); |
9981c27e | 1047 | successful_send(IVAL(line, 0)); |
9981c27e | 1048 | break; |
8ef246e0 WD |
1049 | case MSG_NO_SEND: |
1050 | if (msg_bytes != 4) | |
1051 | goto invalid_msg; | |
1052 | read_loop(fd, line, msg_bytes); | |
1053 | send_msg_int(MSG_NO_SEND, IVAL(line, 0)); | |
1054 | break; | |
d17e1dd2 WD |
1055 | case MSG_INFO: |
1056 | case MSG_ERROR: | |
f2a4853c WD |
1057 | if (msg_bytes >= sizeof line) { |
1058 | overflow: | |
bd9fca47 | 1059 | rprintf(FERROR, |
cdf236aa | 1060 | "multiplexing overflow %d:%ld [%s]\n", |
f2a4853c | 1061 | tag, (long)msg_bytes, who_am_i()); |
d17e1dd2 WD |
1062 | exit_cleanup(RERR_STREAMIO); |
1063 | } | |
f2a4853c | 1064 | read_loop(fd, line, msg_bytes); |
332cf6df | 1065 | rwrite((enum logcode)tag, line, msg_bytes, 1); |
d17e1dd2 WD |
1066 | break; |
1067 | default: | |
cdf236aa WD |
1068 | rprintf(FERROR, "unexpected tag %d [%s]\n", |
1069 | tag, who_am_i()); | |
65417579 | 1070 | exit_cleanup(RERR_STREAMIO); |
8d9dc9f9 | 1071 | } |
8d9dc9f9 AT |
1072 | } |
1073 | ||
8ef246e0 | 1074 | if (iobuf_in_remaining == 0) |
d17e1dd2 | 1075 | io_flush(NORMAL_FLUSH); |
76c21947 | 1076 | |
d8aeda1e | 1077 | return cnt; |
8d9dc9f9 AT |
1078 | } |
1079 | ||
dde5b772 WD |
1080 | /* Do a buffered read from fd. Don't return until all N bytes have |
1081 | * been read. If all N can't be read then exit with an error. */ | |
3151cbae | 1082 | static void readfd(int fd, char *buffer, size_t N) |
720b47f2 | 1083 | { |
d8aeda1e | 1084 | int cnt; |
d62bcc17 | 1085 | size_t total = 0; |
3151cbae | 1086 | |
6ba9279f | 1087 | while (total < N) { |
d8aeda1e WD |
1088 | cnt = readfd_unbuffered(fd, buffer + total, N-total); |
1089 | total += cnt; | |
7f28dbee | 1090 | } |
1b7c47cb | 1091 | |
b9f592fb WD |
1092 | if (fd == write_batch_monitor_in) { |
1093 | if ((size_t)write(batch_fd, buffer, total) != total) | |
1094 | exit_cleanup(RERR_FILEIO); | |
1095 | } | |
1f75bb10 | 1096 | |
8ef246e0 WD |
1097 | if (fd == flist_forward_from) |
1098 | writefd(iobuf_f_out, buffer, total); | |
1099 | ||
1f75bb10 WD |
1100 | if (fd == sock_f_in) |
1101 | stats.total_read += total; | |
720b47f2 AT |
1102 | } |
1103 | ||
3a993aa4 | 1104 | unsigned short read_shortint(int f) |
9361f839 | 1105 | { |
482f48cc WD |
1106 | char b[2]; |
1107 | readfd(f, b, 2); | |
1108 | return (UVAL(b, 1) << 8) + UVAL(b, 0); | |
9361f839 WD |
1109 | } |
1110 | ||
b7922338 | 1111 | int32 read_int(int f) |
720b47f2 | 1112 | { |
4c36ddbe | 1113 | char b[4]; |
d8aeda1e | 1114 | int32 num; |
d730b113 | 1115 | |
482f48cc WD |
1116 | readfd(f, b, 4); |
1117 | num = IVAL(b, 0); | |
1118 | #if SIZEOF_INT32 > 4 | |
1119 | if (num & (int32)0x80000000) | |
1120 | num |= ~(int32)0xffffffff; | |
1121 | #endif | |
d8aeda1e | 1122 | return num; |
720b47f2 AT |
1123 | } |
1124 | ||
351e23ad | 1125 | int32 read_varint(int f) |
3a6a366f | 1126 | { |
351e23ad WD |
1127 | union { |
1128 | char b[5]; | |
1129 | int32 x; | |
1130 | } u; | |
1131 | uchar ch; | |
1132 | int extra; | |
1133 | ||
1134 | u.x = 0; | |
1135 | readfd(f, (char*)&ch, 1); | |
1136 | extra = int_byte_extra[ch / 4]; | |
1137 | if (extra) { | |
1138 | uchar bit = ((uchar)1<<(8-extra)); | |
1139 | if (extra >= (int)sizeof u.b) { | |
1140 | rprintf(FERROR, "Overflow in read_varint()\n"); | |
1141 | exit_cleanup(RERR_STREAMIO); | |
1142 | } | |
1143 | readfd(f, u.b, extra); | |
1144 | u.b[extra] = ch & (bit-1); | |
1145 | } else | |
1146 | u.b[0] = ch; | |
1147 | #if CAREFUL_ALIGNMENT | |
1148 | u.x = IVAL(u.b,0); | |
1149 | #endif | |
1150 | #if SIZEOF_INT32 > 4 | |
1151 | if (u.x & (int32)0x80000000) | |
1152 | u.x |= ~(int32)0xffffffff; | |
1153 | #endif | |
1154 | return u.x; | |
1155 | } | |
71c46176 | 1156 | |
351e23ad WD |
1157 | int64 read_varlong(int f, uchar min_bytes) |
1158 | { | |
1159 | union { | |
1160 | char b[9]; | |
1161 | int64 x; | |
1162 | } u; | |
1163 | char b2[8]; | |
1164 | int extra; | |
71c46176 | 1165 | |
031fa9ad | 1166 | #if SIZEOF_INT64 < 8 |
351e23ad | 1167 | memset(u.b, 0, 8); |
031fa9ad | 1168 | #else |
351e23ad | 1169 | u.x = 0; |
031fa9ad | 1170 | #endif |
351e23ad WD |
1171 | readfd(f, b2, min_bytes); |
1172 | memcpy(u.b, b2+1, min_bytes-1); | |
1173 | extra = int_byte_extra[CVAL(b2, 0) / 4]; | |
1174 | if (extra) { | |
1175 | uchar bit = ((uchar)1<<(8-extra)); | |
1176 | if (min_bytes + extra > (int)sizeof u.b) { | |
1177 | rprintf(FERROR, "Overflow in read_varlong()\n"); | |
1178 | exit_cleanup(RERR_STREAMIO); | |
1179 | } | |
1180 | readfd(f, u.b + min_bytes - 1, extra); | |
1181 | u.b[min_bytes + extra - 1] = CVAL(b2, 0) & (bit-1); | |
4ea4acf1 | 1182 | #if SIZEOF_INT64 < 8 |
351e23ad | 1183 | if (min_bytes + extra > 5 || u.b[4] || CVAL(u.b,3) & 0x80) { |
4ea4acf1 WD |
1184 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1185 | exit_cleanup(RERR_UNSUPPORTED); | |
1186 | } | |
1187 | #endif | |
351e23ad WD |
1188 | } else |
1189 | u.b[min_bytes + extra - 1] = CVAL(b2, 0); | |
1190 | #if SIZEOF_INT64 < 8 | |
1191 | u.x = IVAL(u.b,0); | |
1192 | #elif CAREFUL_ALIGNMENT | |
1193 | u.x = IVAL(u.b,0) | (((int64)IVAL(u.b,4))<<32); | |
1194 | #endif | |
1195 | return u.x; | |
1196 | } | |
1197 | ||
1198 | int64 read_longint(int f) | |
1199 | { | |
4ea4acf1 | 1200 | #if SIZEOF_INT64 >= 8 |
351e23ad | 1201 | char b[9]; |
4ea4acf1 | 1202 | #endif |
351e23ad | 1203 | int32 num = read_int(f); |
71c46176 | 1204 | |
351e23ad WD |
1205 | if (num != (int32)0xffffffff) |
1206 | return num; | |
1207 | ||
1208 | #if SIZEOF_INT64 < 8 | |
1209 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1210 | exit_cleanup(RERR_UNSUPPORTED); | |
1211 | #else | |
1212 | readfd(f, b, 8); | |
1213 | return IVAL(b,0) | (((int64)IVAL(b,4))<<32); | |
1214 | #endif | |
3a6a366f AT |
1215 | } |
1216 | ||
4a19c3b2 | 1217 | void read_buf(int f, char *buf, size_t len) |
720b47f2 | 1218 | { |
4c36ddbe | 1219 | readfd(f,buf,len); |
720b47f2 AT |
1220 | } |
1221 | ||
4a19c3b2 | 1222 | void read_sbuf(int f, char *buf, size_t len) |
575f2fca | 1223 | { |
93095cbe | 1224 | readfd(f, buf, len); |
af436313 | 1225 | buf[len] = '\0'; |
575f2fca AT |
1226 | } |
1227 | ||
9361f839 | 1228 | uchar read_byte(int f) |
182dca5c | 1229 | { |
9361f839 | 1230 | uchar c; |
93095cbe | 1231 | readfd(f, (char *)&c, 1); |
4c36ddbe | 1232 | return c; |
182dca5c | 1233 | } |
720b47f2 | 1234 | |
46e99b09 WD |
1235 | int read_vstring(int f, char *buf, int bufsize) |
1236 | { | |
1237 | int len = read_byte(f); | |
1238 | ||
1239 | if (len & 0x80) | |
1240 | len = (len & ~0x80) * 0x100 + read_byte(f); | |
1241 | ||
1242 | if (len >= bufsize) { | |
1243 | rprintf(FERROR, "over-long vstring received (%d > %d)\n", | |
1244 | len, bufsize - 1); | |
9a6ed83f | 1245 | return -1; |
46e99b09 WD |
1246 | } |
1247 | ||
1248 | if (len) | |
1249 | readfd(f, buf, len); | |
1250 | buf[len] = '\0'; | |
1251 | return len; | |
1252 | } | |
1253 | ||
188fed95 WD |
1254 | /* Populate a sum_struct with values from the socket. This is |
1255 | * called by both the sender and the receiver. */ | |
1256 | void read_sum_head(int f, struct sum_struct *sum) | |
1257 | { | |
1258 | sum->count = read_int(f); | |
c638caa6 WD |
1259 | if (sum->count < 0) { |
1260 | rprintf(FERROR, "Invalid checksum count %ld [%s]\n", | |
1261 | (long)sum->count, who_am_i()); | |
1262 | exit_cleanup(RERR_PROTOCOL); | |
1263 | } | |
188fed95 WD |
1264 | sum->blength = read_int(f); |
1265 | if (sum->blength < 0 || sum->blength > MAX_BLOCK_SIZE) { | |
cdf236aa WD |
1266 | rprintf(FERROR, "Invalid block length %ld [%s]\n", |
1267 | (long)sum->blength, who_am_i()); | |
188fed95 WD |
1268 | exit_cleanup(RERR_PROTOCOL); |
1269 | } | |
1270 | sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f); | |
a0456b9c | 1271 | if (sum->s2length < 0 || sum->s2length > MAX_DIGEST_LEN) { |
cdf236aa WD |
1272 | rprintf(FERROR, "Invalid checksum length %d [%s]\n", |
1273 | sum->s2length, who_am_i()); | |
188fed95 WD |
1274 | exit_cleanup(RERR_PROTOCOL); |
1275 | } | |
1276 | sum->remainder = read_int(f); | |
1277 | if (sum->remainder < 0 || sum->remainder > sum->blength) { | |
cdf236aa WD |
1278 | rprintf(FERROR, "Invalid remainder length %ld [%s]\n", |
1279 | (long)sum->remainder, who_am_i()); | |
188fed95 WD |
1280 | exit_cleanup(RERR_PROTOCOL); |
1281 | } | |
1282 | } | |
1283 | ||
c207d7ec WD |
1284 | /* Send the values from a sum_struct over the socket. Set sum to |
1285 | * NULL if there are no checksums to send. This is called by both | |
1286 | * the generator and the sender. */ | |
1287 | void write_sum_head(int f, struct sum_struct *sum) | |
1288 | { | |
1289 | static struct sum_struct null_sum; | |
1290 | ||
1291 | if (sum == NULL) | |
1292 | sum = &null_sum; | |
1293 | ||
1294 | write_int(f, sum->count); | |
1295 | write_int(f, sum->blength); | |
1296 | if (protocol_version >= 27) | |
1297 | write_int(f, sum->s2length); | |
1298 | write_int(f, sum->remainder); | |
1299 | } | |
1300 | ||
08571358 MP |
1301 | /** |
1302 | * Sleep after writing to limit I/O bandwidth usage. | |
1303 | * | |
1304 | * @todo Rather than sleeping after each write, it might be better to | |
1305 | * use some kind of averaging. The current algorithm seems to always | |
1306 | * use a bit less bandwidth than specified, because it doesn't make up | |
1307 | * for slow periods. But arguably this is a feature. In addition, we | |
1308 | * ought to take the time used to write the data into account. | |
71e58630 WD |
1309 | * |
1310 | * During some phases of big transfers (file FOO is uptodate) this is | |
1311 | * called with a small bytes_written every time. As the kernel has to | |
1312 | * round small waits up to guarantee that we actually wait at least the | |
1313 | * requested number of microseconds, this can become grossly inaccurate. | |
1314 | * We therefore keep track of the bytes we've written over time and only | |
1315 | * sleep when the accumulated delay is at least 1 tenth of a second. | |
08571358 MP |
1316 | **/ |
1317 | static void sleep_for_bwlimit(int bytes_written) | |
1318 | { | |
71e58630 | 1319 | static struct timeval prior_tv; |
0f78b815 | 1320 | static long total_written = 0; |
71e58630 WD |
1321 | struct timeval tv, start_tv; |
1322 | long elapsed_usec, sleep_usec; | |
1323 | ||
1324 | #define ONE_SEC 1000000L /* # of microseconds in a second */ | |
08571358 | 1325 | |
9a0cfff5 | 1326 | if (!bwlimit_writemax) |
08571358 | 1327 | return; |
e681e820 | 1328 | |
0f78b815 | 1329 | total_written += bytes_written; |
71e58630 WD |
1330 | |
1331 | gettimeofday(&start_tv, NULL); | |
1332 | if (prior_tv.tv_sec) { | |
1333 | elapsed_usec = (start_tv.tv_sec - prior_tv.tv_sec) * ONE_SEC | |
1334 | + (start_tv.tv_usec - prior_tv.tv_usec); | |
1335 | total_written -= elapsed_usec * bwlimit / (ONE_SEC/1024); | |
1336 | if (total_written < 0) | |
1337 | total_written = 0; | |
1338 | } | |
3151cbae | 1339 | |
71e58630 WD |
1340 | sleep_usec = total_written * (ONE_SEC/1024) / bwlimit; |
1341 | if (sleep_usec < ONE_SEC / 10) { | |
1342 | prior_tv = start_tv; | |
1343 | return; | |
1344 | } | |
08571358 | 1345 | |
71e58630 WD |
1346 | tv.tv_sec = sleep_usec / ONE_SEC; |
1347 | tv.tv_usec = sleep_usec % ONE_SEC; | |
98b332ed | 1348 | select(0, NULL, NULL, NULL, &tv); |
71e58630 WD |
1349 | |
1350 | gettimeofday(&prior_tv, NULL); | |
1351 | elapsed_usec = (prior_tv.tv_sec - start_tv.tv_sec) * ONE_SEC | |
1352 | + (prior_tv.tv_usec - start_tv.tv_usec); | |
1353 | total_written = (sleep_usec - elapsed_usec) * bwlimit / (ONE_SEC/1024); | |
08571358 MP |
1354 | } |
1355 | ||
1f75bb10 | 1356 | /* Write len bytes to the file descriptor fd, looping as necessary to get |
0fb2fc4a | 1357 | * the job done and also (in certain circumstances) reading any data on |
af436313 | 1358 | * msg_fd_in to avoid deadlock. |
880da007 MP |
1359 | * |
1360 | * This function underlies the multiplexing system. The body of the | |
1f75bb10 | 1361 | * application never calls this function directly. */ |
4a19c3b2 | 1362 | static void writefd_unbuffered(int fd, const char *buf, size_t len) |
720b47f2 | 1363 | { |
1ea087a7 | 1364 | size_t n, total = 0; |
6c850772 | 1365 | fd_set w_fds, r_fds, e_fds; |
d8aeda1e | 1366 | int maxfd, count, cnt, using_r_fds; |
e4c877cf | 1367 | int defer_inc = 0; |
8d9dc9f9 | 1368 | struct timeval tv; |
720b47f2 | 1369 | |
3be97bf9 | 1370 | if (no_flush++) |
e4c877cf | 1371 | defer_forwarding_messages++, defer_inc++; |
e44f9a12 | 1372 | |
4c36ddbe | 1373 | while (total < len) { |
8d9dc9f9 | 1374 | FD_ZERO(&w_fds); |
6c850772 WD |
1375 | FD_SET(fd, &w_fds); |
1376 | FD_ZERO(&e_fds); | |
1377 | FD_SET(fd, &e_fds); | |
1ea087a7 | 1378 | maxfd = fd; |
4c36ddbe | 1379 | |
954bbed8 | 1380 | if (msg_fd_in >= 0) { |
56014c8c | 1381 | FD_ZERO(&r_fds); |
6c850772 | 1382 | FD_SET(msg_fd_in, &r_fds); |
1ea087a7 WD |
1383 | if (msg_fd_in > maxfd) |
1384 | maxfd = msg_fd_in; | |
3eeac9bc WD |
1385 | using_r_fds = 1; |
1386 | } else | |
1387 | using_r_fds = 0; | |
8d9dc9f9 | 1388 | |
e626b29e | 1389 | tv.tv_sec = select_timeout; |
8d9dc9f9 | 1390 | tv.tv_usec = 0; |
4c36ddbe | 1391 | |
554e0a8d | 1392 | errno = 0; |
3eeac9bc | 1393 | count = select(maxfd + 1, using_r_fds ? &r_fds : NULL, |
6c850772 | 1394 | &w_fds, &e_fds, &tv); |
4c36ddbe AT |
1395 | |
1396 | if (count <= 0) { | |
1ea087a7 | 1397 | if (count < 0 && errno == EBADF) |
554e0a8d | 1398 | exit_cleanup(RERR_SOCKETIO); |
bd717af8 | 1399 | check_timeout(); |
8d9dc9f9 AT |
1400 | continue; |
1401 | } | |
4c36ddbe | 1402 | |
35c8fd76 WD |
1403 | /*if (FD_ISSET(fd, &e_fds)) |
1404 | rprintf(FINFO, "select exception on fd %d\n", fd); */ | |
6c850772 | 1405 | |
3eeac9bc | 1406 | if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds)) |
d17e1dd2 | 1407 | read_msg_fd(); |
554e0a8d | 1408 | |
9a6ed83f | 1409 | if (!FD_ISSET(fd, &w_fds)) |
1ea087a7 | 1410 | continue; |
4c36ddbe | 1411 | |
1ea087a7 | 1412 | n = len - total; |
9a0cfff5 | 1413 | if (bwlimit_writemax && n > bwlimit_writemax) |
1ea087a7 | 1414 | n = bwlimit_writemax; |
d8aeda1e | 1415 | cnt = write(fd, buf + total, n); |
1ea087a7 | 1416 | |
d8aeda1e WD |
1417 | if (cnt <= 0) { |
1418 | if (cnt < 0) { | |
3309507d WD |
1419 | if (errno == EINTR) |
1420 | continue; | |
1421 | if (errno == EWOULDBLOCK || errno == EAGAIN) { | |
1422 | msleep(1); | |
1423 | continue; | |
1424 | } | |
f0359dd0 AT |
1425 | } |
1426 | ||
1ea087a7 | 1427 | /* Don't try to write errors back across the stream. */ |
1f75bb10 | 1428 | if (fd == sock_f_out) |
8ef246e0 | 1429 | io_end_multiplex_out(); |
2a5df862 WD |
1430 | /* Don't try to write errors down a failing msg pipe. */ |
1431 | if (am_server && fd == msg_fd_out) | |
1432 | exit_cleanup(RERR_STREAMIO); | |
1ea087a7 | 1433 | rsyserr(FERROR, errno, |
b88c2e8f WD |
1434 | "writefd_unbuffered failed to write %ld bytes [%s]", |
1435 | (long)len, who_am_i()); | |
d1b31da7 WD |
1436 | /* If the other side is sending us error messages, try |
1437 | * to grab any messages they sent before they died. */ | |
7f459268 | 1438 | while (fd == sock_f_out && io_multiplexing_in) { |
3b0a30eb | 1439 | set_io_timeout(30); |
9e2409ab | 1440 | ignore_timeout = 0; |
d1b31da7 WD |
1441 | readfd_unbuffered(sock_f_in, io_filesfrom_buf, |
1442 | sizeof io_filesfrom_buf); | |
1443 | } | |
1ea087a7 WD |
1444 | exit_cleanup(RERR_STREAMIO); |
1445 | } | |
4c36ddbe | 1446 | |
d8aeda1e | 1447 | total += cnt; |
e4c877cf | 1448 | defer_forwarding_messages++, defer_inc++; |
a800434a | 1449 | |
1f75bb10 | 1450 | if (fd == sock_f_out) { |
626bec8e | 1451 | if (io_timeout || am_generator) |
3b0a30eb | 1452 | last_io_out = time(NULL); |
d8aeda1e | 1453 | sleep_for_bwlimit(cnt); |
1f75bb10 | 1454 | } |
4c36ddbe | 1455 | } |
e44f9a12 AT |
1456 | |
1457 | no_flush--; | |
e4c877cf WD |
1458 | if (!(defer_forwarding_messages -= defer_inc)) |
1459 | msg_flush(); | |
d6dead6b AT |
1460 | } |
1461 | ||
dde5b772 | 1462 | void io_flush(int flush_it_all) |
d6dead6b | 1463 | { |
1f75bb10 | 1464 | if (!iobuf_out_cnt || no_flush) |
d17e1dd2 | 1465 | return; |
8d9dc9f9 | 1466 | |
d17e1dd2 | 1467 | if (io_multiplexing_out) |
332cf6df | 1468 | mplex_write(sock_f_out, MSG_DATA, iobuf_out, iobuf_out_cnt, 0); |
d17e1dd2 | 1469 | else |
8ef246e0 | 1470 | writefd_unbuffered(iobuf_f_out, iobuf_out, iobuf_out_cnt); |
1f75bb10 | 1471 | iobuf_out_cnt = 0; |
e4c877cf WD |
1472 | |
1473 | if (flush_it_all && !defer_forwarding_messages) | |
1474 | msg_flush(); | |
8d9dc9f9 AT |
1475 | } |
1476 | ||
4a19c3b2 | 1477 | static void writefd(int fd, const char *buf, size_t len) |
d6dead6b | 1478 | { |
1f75bb10 WD |
1479 | if (fd == sock_f_out) |
1480 | stats.total_written += len; | |
1481 | ||
b9f592fb WD |
1482 | if (fd == write_batch_monitor_out) { |
1483 | if ((size_t)write(batch_fd, buf, len) != len) | |
1484 | exit_cleanup(RERR_FILEIO); | |
1485 | } | |
1486 | ||
8ef246e0 | 1487 | if (!iobuf_out || fd != iobuf_f_out) { |
4c36ddbe AT |
1488 | writefd_unbuffered(fd, buf, len); |
1489 | return; | |
1490 | } | |
d6dead6b AT |
1491 | |
1492 | while (len) { | |
1f75bb10 | 1493 | int n = MIN((int)len, IO_BUFFER_SIZE - iobuf_out_cnt); |
d6dead6b | 1494 | if (n > 0) { |
1f75bb10 | 1495 | memcpy(iobuf_out+iobuf_out_cnt, buf, n); |
d6dead6b AT |
1496 | buf += n; |
1497 | len -= n; | |
1f75bb10 | 1498 | iobuf_out_cnt += n; |
d6dead6b | 1499 | } |
3151cbae | 1500 | |
1f75bb10 | 1501 | if (iobuf_out_cnt == IO_BUFFER_SIZE) |
d17e1dd2 | 1502 | io_flush(NORMAL_FLUSH); |
d6dead6b | 1503 | } |
d6dead6b | 1504 | } |
720b47f2 | 1505 | |
3a993aa4 | 1506 | void write_shortint(int f, unsigned short x) |
9361f839 | 1507 | { |
3a993aa4 WD |
1508 | char b[2]; |
1509 | b[0] = (char)x; | |
1510 | b[1] = (char)(x >> 8); | |
1511 | writefd(f, b, 2); | |
9361f839 WD |
1512 | } |
1513 | ||
351e23ad WD |
1514 | void write_int(int f, int32 x) |
1515 | { | |
1516 | char b[4]; | |
1517 | SIVAL(b, 0, x); | |
1518 | writefd(f, b, 4); | |
1519 | } | |
1520 | ||
f31514ad | 1521 | void write_varint(int f, int32 x) |
1c3344a1 WD |
1522 | { |
1523 | char b[5]; | |
351e23ad WD |
1524 | uchar bit; |
1525 | int cnt = 4; | |
1526 | ||
1527 | SIVAL(b, 1, x); | |
1528 | ||
1529 | while (cnt > 1 && b[cnt] == 0) | |
1530 | cnt--; | |
1531 | bit = ((uchar)1<<(7-cnt+1)); | |
1532 | if (CVAL(b, cnt) >= bit) { | |
1533 | cnt++; | |
1534 | *b = ~(bit-1); | |
1535 | } else if (cnt > 1) | |
1536 | *b = b[cnt] | ~(bit*2-1); | |
1537 | else | |
1538 | *b = b[cnt]; | |
1539 | ||
1540 | writefd(f, b, cnt); | |
1c3344a1 WD |
1541 | } |
1542 | ||
351e23ad | 1543 | void write_varlong(int f, int64 x, uchar min_bytes) |
720b47f2 | 1544 | { |
351e23ad WD |
1545 | char b[9]; |
1546 | uchar bit; | |
1547 | int cnt = 8; | |
1548 | ||
1549 | SIVAL(b, 1, x); | |
1550 | #if SIZEOF_INT64 >= 8 | |
1551 | SIVAL(b, 5, x >> 32); | |
1552 | #else | |
1553 | if (x <= 0x7FFFFFFF && x >= 0) | |
1554 | memset(b + 5, 0, 4); | |
1555 | else { | |
1556 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); | |
1557 | exit_cleanup(RERR_UNSUPPORTED); | |
1558 | } | |
1559 | #endif | |
1560 | ||
1561 | while (cnt > min_bytes && b[cnt] == 0) | |
1562 | cnt--; | |
1563 | bit = ((uchar)1<<(7-cnt+min_bytes)); | |
1564 | if (CVAL(b, cnt) >= bit) { | |
1565 | cnt++; | |
1566 | *b = ~(bit-1); | |
1567 | } else if (cnt > min_bytes) | |
1568 | *b = b[cnt] | ~(bit*2-1); | |
1569 | else | |
1570 | *b = b[cnt]; | |
1571 | ||
1572 | writefd(f, b, cnt); | |
720b47f2 AT |
1573 | } |
1574 | ||
7a24c346 MP |
1575 | /* |
1576 | * Note: int64 may actually be a 32-bit type if ./configure couldn't find any | |
1577 | * 64-bit types on this platform. | |
1578 | */ | |
71c46176 | 1579 | void write_longint(int f, int64 x) |
3a6a366f | 1580 | { |
351e23ad | 1581 | char b[12], * const s = b+4; |
3a6a366f | 1582 | |
351e23ad WD |
1583 | SIVAL(s, 0, x); |
1584 | if (x <= 0x7FFFFFFF && x >= 0) { | |
482f48cc | 1585 | writefd(f, s, 4); |
351e23ad WD |
1586 | return; |
1587 | } | |
3a6a366f | 1588 | |
4ea4acf1 | 1589 | #if SIZEOF_INT64 < 8 |
351e23ad WD |
1590 | rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n"); |
1591 | exit_cleanup(RERR_UNSUPPORTED); | |
4ea4acf1 | 1592 | #else |
351e23ad WD |
1593 | memset(b, 0xFF, 4); |
1594 | SIVAL(s, 4, x >> 32); | |
1595 | writefd(f, b, 12); | |
4ea4acf1 | 1596 | #endif |
3a6a366f AT |
1597 | } |
1598 | ||
4a19c3b2 | 1599 | void write_buf(int f, const char *buf, size_t len) |
720b47f2 | 1600 | { |
4c36ddbe | 1601 | writefd(f,buf,len); |
720b47f2 AT |
1602 | } |
1603 | ||
880da007 | 1604 | /** Write a string to the connection */ |
4a19c3b2 | 1605 | void write_sbuf(int f, const char *buf) |
f0fca04e | 1606 | { |
93095cbe | 1607 | writefd(f, buf, strlen(buf)); |
f0fca04e AT |
1608 | } |
1609 | ||
9361f839 | 1610 | void write_byte(int f, uchar c) |
182dca5c | 1611 | { |
93095cbe | 1612 | writefd(f, (char *)&c, 1); |
182dca5c AT |
1613 | } |
1614 | ||
4a19c3b2 | 1615 | void write_vstring(int f, const char *str, int len) |
46e99b09 WD |
1616 | { |
1617 | uchar lenbuf[3], *lb = lenbuf; | |
1618 | ||
1619 | if (len > 0x7F) { | |
1620 | if (len > 0x7FFF) { | |
1621 | rprintf(FERROR, | |
1622 | "attempting to send over-long vstring (%d > %d)\n", | |
1623 | len, 0x7FFF); | |
1624 | exit_cleanup(RERR_PROTOCOL); | |
1625 | } | |
1626 | *lb++ = len / 0x100 + 0x80; | |
1627 | } | |
1628 | *lb = len; | |
1629 | ||
1630 | writefd(f, (char*)lenbuf, lb - lenbuf + 1); | |
1631 | if (len) | |
1632 | writefd(f, str, len); | |
1633 | } | |
1634 | ||
8a65e0ce WD |
1635 | /* Send a file-list index using a byte-reduction method. */ |
1636 | void write_ndx(int f, int32 ndx) | |
1637 | { | |
1638 | static int32 prev_positive = -1, prev_negative = 1; | |
1639 | int32 diff, cnt = 0; | |
1640 | char b[6]; | |
1641 | ||
1642 | if (protocol_version < 30 || read_batch) { | |
1643 | write_int(f, ndx); | |
1644 | return; | |
1645 | } | |
1646 | ||
1647 | /* Send NDX_DONE as a single-byte 0 with no side effects. Send | |
1648 | * negative nums as a positive after sending a leading 0xFF. */ | |
1649 | if (ndx >= 0) { | |
1650 | diff = ndx - prev_positive; | |
1651 | prev_positive = ndx; | |
1652 | } else if (ndx == NDX_DONE) { | |
1653 | *b = 0; | |
1654 | writefd(f, b, 1); | |
1655 | return; | |
1656 | } else { | |
1657 | b[cnt++] = (char)0xFF; | |
1658 | ndx = -ndx; | |
1659 | diff = ndx - prev_negative; | |
1660 | prev_negative = ndx; | |
1661 | } | |
1662 | ||
1663 | /* A diff of 1 - 253 is sent as a one-byte diff; a diff of 254 - 32767 | |
1664 | * or 0 is sent as a 0xFE + a two-byte diff; otherwise we send 0xFE | |
1665 | * & all 4 bytes of the (non-negative) num with the high-bit set. */ | |
1666 | if (diff < 0xFE && diff > 0) | |
1667 | b[cnt++] = (char)diff; | |
1668 | else if (diff < 0 || diff > 0x7FFF) { | |
1669 | b[cnt++] = (char)0xFE; | |
1670 | b[cnt++] = (char)((ndx >> 24) | 0x80); | |
8a65e0ce | 1671 | b[cnt++] = (char)ndx; |
351e23ad WD |
1672 | b[cnt++] = (char)(ndx >> 8); |
1673 | b[cnt++] = (char)(ndx >> 16); | |
8a65e0ce WD |
1674 | } else { |
1675 | b[cnt++] = (char)0xFE; | |
1676 | b[cnt++] = (char)(diff >> 8); | |
1677 | b[cnt++] = (char)diff; | |
1678 | } | |
1679 | writefd(f, b, cnt); | |
1680 | } | |
1681 | ||
1682 | /* Receive a file-list index using a byte-reduction method. */ | |
1683 | int32 read_ndx(int f) | |
1684 | { | |
1685 | static int32 prev_positive = -1, prev_negative = 1; | |
1686 | int32 *prev_ptr, num; | |
1687 | char b[4]; | |
1688 | ||
1689 | if (protocol_version < 30) | |
1690 | return read_int(f); | |
1691 | ||
1692 | readfd(f, b, 1); | |
1693 | if (CVAL(b, 0) == 0xFF) { | |
1694 | readfd(f, b, 1); | |
1695 | prev_ptr = &prev_negative; | |
1696 | } else if (CVAL(b, 0) == 0) | |
1697 | return NDX_DONE; | |
1698 | else | |
1699 | prev_ptr = &prev_positive; | |
1700 | if (CVAL(b, 0) == 0xFE) { | |
1701 | readfd(f, b, 2); | |
1702 | if (CVAL(b, 0) & 0x80) { | |
351e23ad WD |
1703 | b[3] = CVAL(b, 0) & ~0x80; |
1704 | b[0] = b[1]; | |
1705 | readfd(f, b+1, 2); | |
1706 | num = IVAL(b, 0); | |
8a65e0ce | 1707 | } else |
351e23ad | 1708 | num = (UVAL(b,0)<<8) + UVAL(b,1) + *prev_ptr; |
8a65e0ce | 1709 | } else |
351e23ad | 1710 | num = UVAL(b, 0) + *prev_ptr; |
8a65e0ce WD |
1711 | *prev_ptr = num; |
1712 | if (prev_ptr == &prev_negative) | |
1713 | num = -num; | |
1714 | return num; | |
1715 | } | |
1716 | ||
67b8f3df WD |
1717 | /* Read a line of up to bufsiz-1 characters into buf. Strips |
1718 | * the (required) trailing newline and all carriage returns. | |
1719 | * Returns 1 for success; 0 for I/O error or truncation. */ | |
1720 | int read_line_old(int f, char *buf, size_t bufsiz) | |
f0fca04e | 1721 | { |
67b8f3df WD |
1722 | bufsiz--; /* leave room for the null */ |
1723 | while (bufsiz > 0) { | |
528bfcd7 | 1724 | buf[0] = 0; |
f0fca04e | 1725 | read_buf(f, buf, 1); |
914cc65c MP |
1726 | if (buf[0] == 0) |
1727 | return 0; | |
6ed6d7f5 | 1728 | if (buf[0] == '\n') |
f0fca04e | 1729 | break; |
f0fca04e AT |
1730 | if (buf[0] != '\r') { |
1731 | buf++; | |
67b8f3df | 1732 | bufsiz--; |
f0fca04e AT |
1733 | } |
1734 | } | |
6ed6d7f5 | 1735 | *buf = '\0'; |
67b8f3df | 1736 | return bufsiz > 0; |
f0fca04e AT |
1737 | } |
1738 | ||
f0fca04e AT |
1739 | void io_printf(int fd, const char *format, ...) |
1740 | { | |
d62bcc17 | 1741 | va_list ap; |
33544bf4 | 1742 | char buf[BIGPATHBUFLEN]; |
f0fca04e | 1743 | int len; |
3151cbae | 1744 | |
f0fca04e | 1745 | va_start(ap, format); |
3151cbae | 1746 | len = vsnprintf(buf, sizeof buf, format, ap); |
f0fca04e AT |
1747 | va_end(ap); |
1748 | ||
f89b9368 WD |
1749 | if (len < 0) |
1750 | exit_cleanup(RERR_STREAMIO); | |
f0fca04e | 1751 | |
33544bf4 WD |
1752 | if (len > (int)sizeof buf) { |
1753 | rprintf(FERROR, "io_printf() was too long for the buffer.\n"); | |
1754 | exit_cleanup(RERR_STREAMIO); | |
1755 | } | |
1756 | ||
f0fca04e AT |
1757 | write_sbuf(fd, buf); |
1758 | } | |
8d9dc9f9 | 1759 | |
d17e1dd2 | 1760 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1761 | void io_start_multiplex_out(void) |
8d9dc9f9 | 1762 | { |
d17e1dd2 | 1763 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1764 | io_start_buffering_out(sock_f_out); |
8d9dc9f9 AT |
1765 | io_multiplexing_out = 1; |
1766 | } | |
1767 | ||
d17e1dd2 | 1768 | /** Setup for multiplexing a MSG_* stream with the data stream. */ |
1f75bb10 | 1769 | void io_start_multiplex_in(void) |
8d9dc9f9 | 1770 | { |
d17e1dd2 | 1771 | io_flush(NORMAL_FLUSH); |
8ef246e0 | 1772 | io_start_buffering_in(sock_f_in); |
8d9dc9f9 AT |
1773 | io_multiplexing_in = 1; |
1774 | } | |
1775 | ||
d17e1dd2 | 1776 | /** Write an message to the multiplexed data stream. */ |
332cf6df | 1777 | int io_multiplex_write(enum msgcode code, const char *buf, size_t len, int convert) |
8d9dc9f9 | 1778 | { |
f89b9368 WD |
1779 | if (!io_multiplexing_out) |
1780 | return 0; | |
d17e1dd2 | 1781 | io_flush(NORMAL_FLUSH); |
1b7c47cb | 1782 | stats.total_written += (len+4); |
332cf6df | 1783 | mplex_write(sock_f_out, code, buf, len, convert); |
8d9dc9f9 AT |
1784 | return 1; |
1785 | } | |
1786 | ||
8ef246e0 | 1787 | void io_end_multiplex_in(void) |
7f459268 WD |
1788 | { |
1789 | io_multiplexing_in = 0; | |
8ef246e0 | 1790 | io_end_buffering_in(); |
7f459268 WD |
1791 | } |
1792 | ||
d17e1dd2 | 1793 | /** Stop output multiplexing. */ |
8ef246e0 | 1794 | void io_end_multiplex_out(void) |
554e0a8d AT |
1795 | { |
1796 | io_multiplexing_out = 0; | |
8ef246e0 | 1797 | io_end_buffering_out(); |
554e0a8d AT |
1798 | } |
1799 | ||
b9f592fb WD |
1800 | void start_write_batch(int fd) |
1801 | { | |
1802 | /* Some communication has already taken place, but we don't | |
1803 | * enable batch writing until here so that we can write a | |
1804 | * canonical record of the communication even though the | |
1805 | * actual communication so far depends on whether a daemon | |
1806 | * is involved. */ | |
1807 | write_int(batch_fd, protocol_version); | |
1808 | write_int(batch_fd, checksum_seed); | |
b9f592fb WD |
1809 | |
1810 | if (am_sender) | |
1811 | write_batch_monitor_out = fd; | |
1812 | else | |
1813 | write_batch_monitor_in = fd; | |
1814 | } | |
1815 | ||
1816 | void stop_write_batch(void) | |
1817 | { | |
1818 | write_batch_monitor_out = -1; | |
1819 | write_batch_monitor_in = -1; | |
1820 | } |