Convert cli_read to use cli_pull
authorVolker Lendecke <vl@samba.org>
Thu, 28 Feb 2008 14:26:01 +0000 (15:26 +0100)
committerVolker Lendecke <vl@samba.org>
Thu, 28 Feb 2008 14:27:55 +0000 (15:27 +0100)
source/libsmb/clireadwrite.c

index 5aee8f18bdbd374e1cf83921507e7d79e3d335c3..c618509f018bd9e71ff40e9cdaa579fe64b4f143 100644 (file)
@@ -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 */