Convert cli_read to use cli_pull

(This used to be commit 719527f55e88f0c5fdceda5c807475aba299c79f)

1 files changed, 15 insertions, 163 deletions

diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c
index 5aee8f18bd..c618509f01 100644
--- a/source3/libsmb/clireadwrite.c
+++ b/source3/libsmb/clireadwrite.c
@@ -444,175 +444,27 @@ NTSTATUS cli_pull(struct cli_state *cli, uint16_t fnum,
 	return result;
 }
 
-/****************************************************************************
-Issue a single SMBread and don't wait for a reply.
-****************************************************************************/
-
-static bool cli_issue_read(struct cli_state *cli, int fnum, off_t offset,
-			   size_t size, int i)
+static NTSTATUS cli_read_sink(char *buf, size_t n, void *priv)
 {
-	bool bigoffset = False;
-
-	memset(cli->outbuf,'\0',smb_size);
-	memset(cli->inbuf,'\0',smb_size);
-
-	if ((SMB_BIG_UINT)offset >> 32)
-		bigoffset = True;
-
-	cli_set_message(cli->outbuf,bigoffset ? 12 : 10,0,True);
-
-	SCVAL(cli->outbuf,smb_com,SMBreadX);
-	SSVAL(cli->outbuf,smb_tid,cli->cnum);
-	cli_setup_packet(cli);
-
-	SCVAL(cli->outbuf,smb_vwv0,0xFF);
-	SSVAL(cli->outbuf,smb_vwv2,fnum);
-	SIVAL(cli->outbuf,smb_vwv3,offset);
-	SSVAL(cli->outbuf,smb_vwv5,size);
-	SSVAL(cli->outbuf,smb_vwv6,size);
-	SSVAL(cli->outbuf,smb_vwv7,(size >> 16));
-	SSVAL(cli->outbuf,smb_mid,cli->mid + i);
-
-	if (bigoffset) {
-		SIVAL(cli->outbuf,smb_vwv10,(((SMB_BIG_UINT)offset)>>32) & 0xffffffff);
-	}
-
-	return cli_send_smb(cli);
+	char **pbuf = (char **)priv;
+	memcpy(*pbuf, buf, n);
+	*pbuf += n;
+	return NT_STATUS_OK;
 }
 
-/****************************************************************************
-  Read size bytes at offset offset using SMBreadX.
-****************************************************************************/
-
-ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+ssize_t cli_read(struct cli_state *cli, int fnum, char *buf,
+		 off_t offset, size_t size)
 {
-	char *p;
-	size_t size2;
-	size_t readsize;
-	ssize_t total = 0;
-	/* We can only do direct reads if not signing or encrypting. */
-	bool direct_reads = !client_is_signing_on(cli) && !cli_encryption_on(cli);
-
-	if (size == 0)
-		return 0;
-
-	/*
-	 * Set readsize to the maximum size we can handle in one readX,
-	 * rounded down to a multiple of 1024.
-	 */
-
-	if (client_is_signing_on(cli) == false &&
-			cli_encryption_on(cli) == false &&
-			(cli->posix_capabilities & CIFS_UNIX_LARGE_READ_CAP)) {
-		readsize = CLI_SAMBA_MAX_POSIX_LARGE_READX_SIZE;
-	} else if (cli->capabilities & CAP_LARGE_READX) {
-		if (cli->is_samba) {
-			readsize = CLI_SAMBA_MAX_LARGE_READX_SIZE;
-		} else {
-			readsize = CLI_WINDOWS_MAX_LARGE_READX_SIZE;
-		}
-	} else {
-		readsize = (cli->max_xmit - (smb_size+32)) & ~1023;
-	}
-
-	while (total < size) {
-		readsize = MIN(readsize, size-total);
-
-		/* Issue a read and receive a reply */
-
-		if (!cli_issue_read(cli, fnum, offset, readsize, 0))
-			return -1;
-
-		if (direct_reads) {
-			if (!cli_receive_smb_readX_header(cli))
-				return -1;
-		} else {
-			if (!cli_receive_smb(cli))
-				return -1;
-		}
-
-		/* Check for error.  Make sure to check for DOS and NT
-                   errors. */
-
-                if (cli_is_error(cli)) {
-			bool recoverable_error = False;
-                        NTSTATUS status = NT_STATUS_OK;
-                        uint8 eclass = 0;
-			uint32 ecode = 0;
-
-                        if (cli_is_nt_error(cli))
-                                status = cli_nt_error(cli);
-                        else
-                                cli_dos_error(cli, &eclass, &ecode);
-
-			/*
-			 * ERRDOS ERRmoredata or STATUS_MORE_ENRTIES is a
-			 * recoverable error, plus we have valid data in the
-			 * packet so don't error out here.
-			 */
-
-                        if ((eclass == ERRDOS && ecode == ERRmoredata) ||
-                            NT_STATUS_V(status) == NT_STATUS_V(STATUS_MORE_ENTRIES))
-				recoverable_error = True;
-
-			if (!recoverable_error)
-                                return -1;
-		}
-
-		/* size2 is the number of bytes the server returned.
-		 * Might be zero. */
-		size2 = SVAL(cli->inbuf, smb_vwv5);
-		size2 |= (((unsigned int)(SVAL(cli->inbuf, smb_vwv7))) << 16);
-
-		if (size2 > readsize) {
-			DEBUG(5,("server returned more than we wanted!\n"));
-			return -1;
-		} else if (size2 < 0) {
-			DEBUG(5,("read return < 0!\n"));
-			return -1;
-		}
-
-		if (size2) {
-			/* smb_vwv6 is the offset in the packet of the returned
-			 * data bytes. Only valid if size2 != 0. */
-
-			if (!direct_reads) {
-				/* Copy data into buffer */
-				p = smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_vwv6);
-				memcpy(buf + total, p, size2);
-			} else {
-				/* Ensure the remaining data matches the return size. */
-				ssize_t toread = smb_len_large(cli->inbuf) - SVAL(cli->inbuf,smb_vwv6);
-
-				/* Ensure the size is correct. */
-				if (toread != size2) {
-					DEBUG(5,("direct read logic fail toread (%d) != size2 (%u)\n",
-						(int)toread, (unsigned int)size2 ));
-					return -1;
-				}
-
-				/* Read data directly into buffer */
-				toread = cli_receive_smb_data(cli,buf+total,size2);
-				if (toread != size2) {
-					DEBUG(5,("direct read read failure toread (%d) != size2 (%u)\n",
-						(int)toread, (unsigned int)size2 ));
-					return -1;
-				}
-			}
-		}
-
-		total += size2;
-		offset += size2;
-
-		/*
-		 * If the server returned less than we asked for we're at EOF.
-		 */
+	NTSTATUS status;
+	ssize_t ret;
 
-		if (size2 < readsize)
-			break;
+	status = cli_pull(cli, fnum, offset, size, size,
+			  cli_read_sink, &buf, &ret);
+	if (!NT_STATUS_IS_OK(status)) {
+		cli_set_error(cli, status);
+		return -1;
 	}
-
-	return total;
+	return ret;
 }
 
 #if 0  /* relies on client_receive_smb(), now a static in libsmb/clientgen.c */