X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/41cfde6be388364f9bf7dfa9a532625b1f660df7..f08ca43472b518b93230acd853532d79b7e8a3a5:/io.c

diff --git a/io.c b/io.c
index 50eca536..035362e9 100644
--- a/io.c
+++ b/io.c
@@ -46,7 +46,9 @@ extern int io_timeout;
 extern int am_server;
 extern int am_daemon;
 extern int am_sender;
+extern int am_generator;
 extern int eol_nulls;
+extern int csum_length;
 extern int checksum_seed;
 extern int protocol_version;
 extern char *remote_filesfrom_file;
@@ -54,6 +56,7 @@ extern struct stats stats;
 
 const char phase_unknown[] = "unknown";
 int select_timeout = SELECT_TIMEOUT;
+int ignore_timeout = 0;
 int batch_fd = -1;
 int batch_gen_fd = -1;
 
@@ -135,7 +138,7 @@ static void check_timeout(void)
 {
 	time_t t;
 
-	if (!io_timeout)
+	if (!io_timeout || ignore_timeout)
 		return;
 
 	if (!last_io) {
@@ -147,7 +150,7 @@ static void check_timeout(void)
 
 	if (t - last_io >= io_timeout) {
 		if (!am_server && !am_daemon) {
-			rprintf(FERROR, "io timeout after %d seconds - exiting\n",
+			rprintf(FERROR, "io timeout after %d seconds -- exiting\n",
 				(int)(t-last_io));
 		}
 		exit_cleanup(RERR_TIMEOUT);
@@ -162,17 +165,17 @@ void io_set_sock_fds(int f_in, int f_out)
 	sock_f_out = f_out;
 }
 
-/** Setup the fd used to receive MSG_* messages.  Only needed when
- * we're the generator because the sender and receiver both use the
- * multiplexed I/O setup. */
+/* Setup the fd used to receive MSG_* messages.  Only needed during the
+ * early stages of being a local sender (up through the sending of the
+ * file list) or when we're the generator (to fetch the messages from
+ * the receiver). */
 void set_msg_fd_in(int fd)
 {
 	msg_fd_in = fd;
 }
 
-/** Setup the fd used to send our MSG_* messages.  Only needed when
- * we're the receiver because the generator and the sender both use
- * the multiplexed I/O setup. */
+/* Setup the fd used to send our MSG_* messages.  Only needed when
+ * we're the receiver (to send our messages to the generator). */
 void set_msg_fd_out(int fd)
 {
 	msg_fd_out = fd;
@@ -201,12 +204,18 @@ static void msg_list_add(int code, char *buf, int len)
 
 void send_msg(enum msgcode code, char *buf, int len)
 {
+	if (msg_fd_out < 0) {
+		io_multiplex_write(code, buf, len);
+		return;
+	}
 	msg_list_add(code, buf, len);
 	msg_list_push(NORMAL_FLUSH);
 }
 
-/** Read a message from the MSG_* fd and dispatch it.  This is only
- * called by the generator. */
+/* Read a message from the MSG_* fd and handle it.  This is called either
+ * during the early stages of being a local sender (up through the sending
+ * of the file list) or when we're the generator (to fetch the messages
+ * from the receiver). */
 static void read_msg_fd(void)
 {
 	char buf[2048];
@@ -226,20 +235,36 @@ static void read_msg_fd(void)
 
 	switch (tag) {
 	case MSG_DONE:
-		if (len != 0) {
+		if (len != 0 || !am_generator) {
 			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
 			exit_cleanup(RERR_STREAMIO);
 		}
 		redo_list_add(-1);
 		break;
 	case MSG_REDO:
-		if (len != 4) {
+		if (len != 4 || !am_generator) {
 			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
 			exit_cleanup(RERR_STREAMIO);
 		}
 		read_loop(fd, buf, 4);
 		redo_list_add(IVAL(buf,0));
 		break;
+	case MSG_DELETED:
+		if (len >= (int)sizeof buf || !am_generator) {
+			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
+			exit_cleanup(RERR_STREAMIO);
+		}
+		read_loop(fd, buf, len);
+		io_multiplex_write(MSG_DELETED, buf, len);
+		break;
+	case MSG_SUCCESS:
+		if (len != 4 || !am_generator) {
+			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
+			exit_cleanup(RERR_STREAMIO);
+		}
+		read_loop(fd, buf, len);
+		io_multiplex_write(MSG_SUCCESS, buf, len);
+		break;
 	case MSG_INFO:
 	case MSG_ERROR:
 	case MSG_LOG:
@@ -610,6 +635,21 @@ void io_end_buffering(void)
 }
 
 
+void maybe_send_keepalive(int allowed_lull, int ndx)
+{
+	if (time(NULL) - last_io >= allowed_lull) {
+		if (!iobuf_out || !iobuf_out_cnt) {
+			if (protocol_version < 29)
+				return; /* there's nothing we can do */
+			write_int(sock_f_out, ndx);
+			write_shortint(sock_f_out, ITEM_IS_NEW);
+		}
+		if (iobuf_out)
+			io_flush(NORMAL_FLUSH);
+	}
+}
+
+
 /**
  * Continue trying to read len bytes - don't return until len has been
  * read.
@@ -636,7 +676,7 @@ static int readfd_unbuffered(int fd, char *buf, size_t len)
 	static size_t remaining;
 	static size_t iobuf_in_ndx;
 	int tag, ret = 0;
-	char line[1024];
+	char line[MAXPATHLEN+1];
 
 	if (!iobuf_in || fd != sock_f_in)
 		return read_timeout(fd, buf, len);
@@ -673,11 +713,37 @@ static int readfd_unbuffered(int fd, char *buf, size_t len)
 			read_loop(fd, iobuf_in, remaining);
 			iobuf_in_ndx = 0;
 			break;
+		case MSG_DELETED:
+			if (remaining >= sizeof line) {
+				rprintf(FERROR, "invalid multi-message %d:%ld\n",
+					tag, (long)remaining);
+				exit_cleanup(RERR_STREAMIO);
+			}
+			read_loop(fd, line, remaining);
+			line[remaining] = '\0';
+			/* A directory name was sent with the trailing null */
+			if (remaining > 0 && !line[remaining-1])
+				log_delete(line, S_IFDIR);
+			else
+				log_delete(line, S_IFREG);
+			remaining = 0;
+			break;
+		case MSG_SUCCESS:
+			if (remaining != 4) {
+				rprintf(FERROR, "invalid multi-message %d:%ld\n",
+					tag, (long)remaining);
+				exit_cleanup(RERR_STREAMIO);
+			}
+			read_loop(fd, line, remaining);
+			successful_send(IVAL(line, 0));
+			remaining = 0;
+			break;
 		case MSG_INFO:
 		case MSG_ERROR:
 			if (remaining >= sizeof line) {
-				rprintf(FERROR, "multiplexing overflow %d:%ld\n\n",
-					tag, (long)remaining);
+				rprintf(FERROR,
+					"[%s] multiplexing overflow %d:%ld\n\n",
+					who_am_i(), tag, (long)remaining);
 				exit_cleanup(RERR_STREAMIO);
 			}
 			read_loop(fd, line, remaining);
@@ -685,7 +751,8 @@ static int readfd_unbuffered(int fd, char *buf, size_t len)
 			remaining = 0;
 			break;
 		default:
-			rprintf(FERROR, "unexpected tag %d\n", tag);
+			rprintf(FERROR, "[%s] unexpected tag %d\n",
+				who_am_i(), tag);
 			exit_cleanup(RERR_STREAMIO);
 		}
 	}
@@ -723,6 +790,14 @@ static void readfd(int fd, char *buffer, size_t N)
 }
 
 
+int read_shortint(int f)
+{
+	uchar b[2];
+	readfd(f, (char *)b, 2);
+	return (b[1] << 8) + b[0];
+}
+
+
 int32 read_int(int f)
 {
 	char b[4];
@@ -744,14 +819,13 @@ int64 read_longint(int f)
 	if ((int32)ret != (int32)0xffffffff)
 		return ret;
 
-#ifdef INT64_IS_OFF_T
-	if (sizeof (int64) < 8) {
-		rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
-		exit_cleanup(RERR_UNSUPPORTED);
-	}
-#endif
+#if SIZEOF_INT64 < 8
+	rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+	exit_cleanup(RERR_UNSUPPORTED);
+#else
 	readfd(f,b,8);
 	ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
+#endif
 
 	return ret;
 }
@@ -767,13 +841,55 @@ void read_sbuf(int f,char *buf,size_t len)
 	buf[len] = 0;
 }
 
-unsigned char read_byte(int f)
+uchar read_byte(int f)
 {
-	unsigned char c;
+	uchar c;
 	readfd(f, (char *)&c, 1);
 	return c;
 }
 
+/* Populate a sum_struct with values from the socket.  This is
+ * called by both the sender and the receiver. */
+void read_sum_head(int f, struct sum_struct *sum)
+{
+	sum->count = read_int(f);
+	sum->blength = read_int(f);
+	if (sum->blength < 0 || sum->blength > MAX_BLOCK_SIZE) {
+		rprintf(FERROR, "[%s] Invalid block length %ld\n",
+			who_am_i(), (long)sum->blength);
+		exit_cleanup(RERR_PROTOCOL);
+	}
+	sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f);
+	if (sum->s2length < 0 || sum->s2length > MD4_SUM_LENGTH) {
+		rprintf(FERROR, "[%s] Invalid checksum length %d\n",
+			who_am_i(), sum->s2length);
+		exit_cleanup(RERR_PROTOCOL);
+	}
+	sum->remainder = read_int(f);
+	if (sum->remainder < 0 || sum->remainder > sum->blength) {
+		rprintf(FERROR, "[%s] Invalid remainder length %ld\n",
+			who_am_i(), (long)sum->remainder);
+		exit_cleanup(RERR_PROTOCOL);
+	}
+}
+
+/* Send the values from a sum_struct over the socket.  Set sum to
+ * NULL if there are no checksums to send.  This is called by both
+ * the generator and the sender. */
+void write_sum_head(int f, struct sum_struct *sum)
+{
+	static struct sum_struct null_sum;
+
+	if (sum == NULL)
+		sum = &null_sum;
+
+	write_int(f, sum->count);
+	write_int(f, sum->blength);
+	if (protocol_version >= 27)
+		write_int(f, sum->s2length);
+	write_int(f, sum->remainder);
+}
+
 
 /**
  * Sleep after writing to limit I/O bandwidth usage.
@@ -913,7 +1029,8 @@ static void writefd_unbuffered(int fd,char *buf,size_t len)
 			/* If the other side is sending us error messages, try
 			 * to grab any messages they sent before they died. */
 			while (fd == sock_f_out && io_multiplexing_in) {
-				io_timeout = 30;
+				io_timeout = select_timeout = 30;
+				ignore_timeout = 0;
 				readfd_unbuffered(sock_f_in, io_filesfrom_buf,
 						  sizeof io_filesfrom_buf);
 			}
@@ -1008,6 +1125,15 @@ static void writefd(int fd,char *buf,size_t len)
 }
 
 
+void write_shortint(int f, int x)
+{
+	uchar b[2];
+	b[0] = x;
+	b[1] = x >> 8;
+	writefd(f, (char *)b, 2);
+}
+
+
 void write_int(int f,int32 x)
 {
 	char b[4];
@@ -1037,18 +1163,16 @@ void write_longint(int f, int64 x)
 		return;
 	}
 
-#ifdef INT64_IS_OFF_T
-	if (sizeof (int64) < 8) {
-		rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
-		exit_cleanup(RERR_UNSUPPORTED);
-	}
-#endif
-
+#if SIZEOF_INT64 < 8
+	rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+	exit_cleanup(RERR_UNSUPPORTED);
+#else
 	write_int(f, (int32)0xFFFFFFFF);
 	SIVAL(b,0,(x&0xFFFFFFFF));
 	SIVAL(b,4,((x>>32)&0xFFFFFFFF));
 
 	writefd(f,b,8);
+#endif
 }
 
 void write_buf(int f,char *buf,size_t len)
@@ -1056,19 +1180,20 @@ void write_buf(int f,char *buf,size_t len)
 	writefd(f,buf,len);
 }
 
+
 /** Write a string to the connection */
 void write_sbuf(int f, char *buf)
 {
 	writefd(f, buf, strlen(buf));
 }
 
-void write_byte(int f,unsigned char c)
+
+void write_byte(int f, uchar c)
 {
 	writefd(f, (char *)&c, 1);
 }
 
 
-
 /**
  * Read a line of up to @p maxlen characters into @p buf (not counting
  * the trailing null).  Strips the (required) trailing newline and all