split clientgen.c into several parts

the next step is splitting out the auth code, to make adding lukes
NTLMSSP support easier
(This used to be commit 10c5470835b43116ed48b3137c3b9cc867a20989)

1 files changed, 273 insertions, 0 deletions

diff --git a/source3/libsmb/clireadwrite.c b/source3/libsmb/clireadwrite.c
new file mode 100644
index 0000000000..8012c02a8f
--- /dev/null
+++ b/source3/libsmb/clireadwrite.c
@@ -0,0 +1,273 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 3.0
+   client file read/write routines
+   Copyright (C) Andrew Tridgell 1994-1998
+   
+   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.
+*/
+
+#define NO_SYSLOG
+
+#include "includes.h"
+
+/****************************************************************************
+issue a single SMBread and don't wait for a reply
+****************************************************************************/
+static void cli_issue_read(struct cli_state *cli, int fnum, off_t offset, 
+			   size_t size, int i)
+{
+	memset(cli->outbuf,'\0',smb_size);
+	memset(cli->inbuf,'\0',smb_size);
+
+	set_message(cli->outbuf,10,0,True);
+		
+	CVAL(cli->outbuf,smb_com) = SMBreadX;
+	SSVAL(cli->outbuf,smb_tid,cli->cnum);
+	cli_setup_packet(cli);
+
+	CVAL(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_mid,cli->mid + i);
+
+	cli_send_smb(cli);
+}
+
+/****************************************************************************
+  read from a file
+****************************************************************************/
+size_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+{
+	char *p;
+	int total = -1;
+	int issued=0;
+	int received=0;
+/*
+ * There is a problem in this code when mpx is more than one.
+ * for some reason files can get corrupted when being read.
+ * Until we understand this fully I am serializing reads (one
+ * read/one reply) for now. JRA.
+ */
+#if 0
+	int mpx = MAX(cli->max_mux-1, 1); 
+#else
+	int mpx = 1;
+#endif
+	int block = (cli->max_xmit - (smb_size+32)) & ~1023;
+	int mid;
+	int blocks = (size + (block-1)) / block;
+
+	if (size == 0) return 0;
+
+	while (received < blocks) {
+		int size2;
+
+		while (issued - received < mpx && issued < blocks) {
+			int size1 = MIN(block, size-issued*block);
+			cli_issue_read(cli, fnum, offset+issued*block, size1, issued);
+			issued++;
+		}
+
+		if (!cli_receive_smb(cli)) {
+			return total;
+		}
+
+		received++;
+		mid = SVAL(cli->inbuf, smb_mid) - cli->mid;
+		size2 = SVAL(cli->inbuf, smb_vwv5);
+
+		if (CVAL(cli->inbuf,smb_rcls) != 0) {
+			blocks = MIN(blocks, mid-1);
+			continue;
+		}
+
+		if (size2 <= 0) {
+			blocks = MIN(blocks, mid-1);
+			/* this distinguishes EOF from an error */
+			total = MAX(total, 0);
+			continue;
+		}
+
+		if (size2 > block) {
+			DEBUG(0,("server returned more than we wanted!\n"));
+			return -1;
+		}
+		if (mid >= issued) {
+			DEBUG(0,("invalid mid from server!\n"));
+			return -1;
+		}
+		p = smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_vwv6);
+
+		memcpy(buf+mid*block, p, size2);
+
+		total = MAX(total, mid*block + size2);
+	}
+
+	while (received < issued) {
+		cli_receive_smb(cli);
+		received++;
+	}
+	
+	return total;
+}
+
+
+/****************************************************************************
+issue a single SMBwrite and don't wait for a reply
+****************************************************************************/
+static void cli_issue_write(struct cli_state *cli, int fnum, off_t offset, uint16 mode, char *buf,
+			    size_t size, int i)
+{
+	char *p;
+
+	memset(cli->outbuf,'\0',smb_size);
+	memset(cli->inbuf,'\0',smb_size);
+
+	set_message(cli->outbuf,12,size,True);
+	
+	CVAL(cli->outbuf,smb_com) = SMBwriteX;
+	SSVAL(cli->outbuf,smb_tid,cli->cnum);
+	cli_setup_packet(cli);
+	
+	CVAL(cli->outbuf,smb_vwv0) = 0xFF;
+	SSVAL(cli->outbuf,smb_vwv2,fnum);
+
+	SIVAL(cli->outbuf,smb_vwv3,offset);
+	SIVAL(cli->outbuf,smb_vwv5,IS_BITS_SET_ALL(mode, 0x0008) ? 0xFFFFFFFF : 0);
+	SSVAL(cli->outbuf,smb_vwv7,mode);
+
+	SSVAL(cli->outbuf,smb_vwv8,IS_BITS_SET_ALL(mode, 0x0008) ? size : 0);
+	SSVAL(cli->outbuf,smb_vwv10,size);
+	SSVAL(cli->outbuf,smb_vwv11,
+	      smb_buf(cli->outbuf) - smb_base(cli->outbuf));
+	
+	p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11);
+	memcpy(p, buf, size);
+
+	SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+	
+	show_msg(cli->outbuf);
+	cli_send_smb(cli);
+}
+
+/****************************************************************************
+  write to a file
+  write_mode: 0x0001 disallow write cacheing
+              0x0002 return bytes remaining
+              0x0004 use raw named pipe protocol
+              0x0008 start of message mode named pipe protocol
+****************************************************************************/
+ssize_t cli_write(struct cli_state *cli,
+		  int fnum, uint16 write_mode,
+		  char *buf, off_t offset, size_t size)
+{
+	int bwritten = 0;
+	int issued = 0;
+	int received = 0;
+	int mpx = MAX(cli->max_mux-1, 1);
+	int block = (cli->max_xmit - (smb_size+32)) & ~1023;
+	int blocks = (size + (block-1)) / block;
+
+	while (received < blocks) {
+
+		while ((issued - received < mpx) && (issued < blocks))
+		{
+			int bsent = issued * block;
+			int size1 = MIN(block, size - bsent);
+
+			cli_issue_write(cli, fnum, offset + bsent,
+			                write_mode,
+			                buf + bsent,
+					size1, issued);
+			issued++;
+		}
+
+		if (!cli_receive_smb(cli))
+		{
+			return bwritten;
+		}
+
+		received++;
+
+		if (CVAL(cli->inbuf,smb_rcls) != 0)
+		{
+			break;
+		}
+
+		bwritten += SVAL(cli->inbuf, smb_vwv2);
+	}
+
+	while (received < issued && cli_receive_smb(cli))
+	{
+		received++;
+	}
+	
+	return bwritten;
+}
+
+
+/****************************************************************************
+  write to a file using a SMBwrite and not bypassing 0 byte writes
+****************************************************************************/
+ssize_t cli_smbwrite(struct cli_state *cli,
+		     int fnum, char *buf, off_t offset, size_t size1)
+{
+	char *p;
+	ssize_t total = 0;
+
+	do {
+		size_t size = MIN(size1, cli->max_xmit - 48);
+		
+		memset(cli->outbuf,'\0',smb_size);
+		memset(cli->inbuf,'\0',smb_size);
+
+		set_message(cli->outbuf,5, 3 + size,True);
+
+		CVAL(cli->outbuf,smb_com) = SMBwrite;
+		SSVAL(cli->outbuf,smb_tid,cli->cnum);
+		cli_setup_packet(cli);
+		
+		SSVAL(cli->outbuf,smb_vwv0,fnum);
+		SSVAL(cli->outbuf,smb_vwv1,size);
+		SIVAL(cli->outbuf,smb_vwv2,offset);
+		SSVAL(cli->outbuf,smb_vwv4,0);
+		
+		p = smb_buf(cli->outbuf);
+		*p++ = 1;
+		SSVAL(p, 0, size);
+		memcpy(p+2, buf, size);
+		
+		cli_send_smb(cli);
+		if (!cli_receive_smb(cli)) {
+			return -1;
+		}
+		
+		if (CVAL(cli->inbuf,smb_rcls) != 0) {
+			return -1;
+		}
+
+		size = SVAL(cli->inbuf,smb_vwv0);
+		if (size == 0) break;
+
+		size1 -= size;
+		total += size;
+	} while (size1);
+
+	return total;
+}
+