docs: split old file io endpoint notes
This commit is contained in:
Mario Fetka
172
src/nwconn.c
172
src/nwconn.c
@@ -6235,63 +6235,22 @@ static int handle_ncp_serv(void)
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}
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break;
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/*
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* Endpoint audit: old direct file-I/O calls, SDK 0x2222/65..77
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* / wire 0x41..0x4d. These are the pre-namespace DOS file
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* operations that sit immediately after the old commit/search calls.
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* They are direct top-level NCP functions, not 22/87 subfunctions.
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*
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* Coverage in this switch:
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*
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* 65 / 0x41 Open File (old)
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* 66 / 0x42 Close File
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* 67 / 0x43 Create File
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* 68 / 0x44 Erase File
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* 69 / 0x45 Rename File
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* 70 / 0x46 Set File Attributes
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* 71 / 0x47 Get Current Size of File
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* 72 / 0x48 Read From a File
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* 73 / 0x49 Write to a File
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* 74 / 0x4a Copy from One File to Another
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* 75 / 0x4b Set File Time Date Stamp
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* 76 / 0x4c Open File
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* 77 / 0x4d Create New File
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*
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* Request/reply shape compared with the NDK/Core-Protocols PDF and
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* the current parser:
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*
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* - Open/Create replies return the old six-byte NetWare FileHandle
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* slot followed by Reserved and NW_FILE_INFO. The SDK documents
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* FileHandle as byte[6] Hi-Lo and says clients use the most
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* significant four bytes. Current MARS-NWE compatibility replies
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* write zero extended-handle bytes and store the local four-byte
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* handle in the remaining slot; matching close/read/write/copy/time
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* handlers ignore the two extended bytes and use GET_32() on the
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* local four-byte handle.
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* - 65 Open File (old) is implemented by calling nw_creat_open_file()
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* with fixed read access. The PDF describes it as the pre-2.0a
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* form of 76 Open File and says it is equivalent to Open File with
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* DesiredAccessRights 0x13; this is a compatibility difference to
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* keep visible if old DOS clients expose it.
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* - 67 Create File and 77 Create New File share the same parser and
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* reply body. The code selects create mode 1 for 67 and mode 2 for
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* 77, matching the documented overwrite-vs-fail-on-exists split.
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* - 68, 69, and 70 have no reply payload; nwconn still sends the
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* normal NCP response envelope with Completion.
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* - 71 returns a four-byte size/position field in Hi-Lo order, as the
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* old Get Current Size of File reply requires.
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* - 72 and 73 use Hi-Lo file offsets and byte counts. Read preserves
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* the documented odd-offset padding quirk by adding one byte before
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* the returned data when the offset is odd.
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* - 74 returns only the actual four-byte transfer count.
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* - 75 updates date/time and has no reply payload.
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*
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* Missing-endpoint check: the PDF's direct old file-I/O block between
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* 65 and 77 is fully represented here. Later file APIs such as
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* 0x2222/84, 0x2222/87/* and 0x2222/89/* are separate namespace/open
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* families and should be audited in their own blocks.
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/* Old direct file-I/O calls, SDK 0x2222/65..77 / wire 0x41..0x4d.
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* These pre-namespace DOS file operations are direct top-level NCP
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* functions, not 22/87 subfunctions. Keep audit notes next to each
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* endpoint below so request/reply checks stay local to the parser.
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*/
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case 0x41 : { /* open file for reading */
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case 0x41 : { /* 65 Open File (old) / wire 0x41.
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* Coverage: implemented.
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* Request: DirHandle, SearchAttributes, PathLen, Path.
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* Reply: six-byte old FileHandle slot, Reserved,
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* NW_FILE_INFO. Current code writes zero extended
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* handle bytes and a local four-byte handle.
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* Difference: the NDK describes this pre-2.0a form as
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* equivalent to 76 Open File with DesiredAccessRights
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* 0x13, while this compatibility path uses fixed read
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* access.
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*/
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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uint8 dirhandle; /* Dirhandle */
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@@ -6325,7 +6284,13 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x42 : /* close file */
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case 0x42 : /* 66 Close File / wire 0x42.
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* Coverage: implemented.
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* Request: reserved byte plus old six-byte FileHandle slot.
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* Reply: no payload, normal Completion response.
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* Difference: the two extended handle bytes are ignored;
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* current code closes the local four-byte handle.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6346,8 +6311,19 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x43 : /* creat file, overwrite if exist */
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case 0x4D : /* create new file */
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case 0x43 : /* 67 Create File / wire 0x43.
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* Coverage: implemented by the shared 67/77 parser.
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* Request: DirHandle, FileAttributes, PathLen, Path.
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* Reply: six-byte old FileHandle slot, Reserved,
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* NW_FILE_INFO. Current code writes zero extended handle
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* bytes and a local four-byte handle.
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* Mode: 67 uses create mode 1, overwrite if the file exists.
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*/
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case 0x4D : /* 77 Create New File / wire 0x4d.
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* Coverage: implemented by the shared 67/77 parser.
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* Request/reply: same old create/open layout as 67.
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* Mode: 77 uses create mode 2, fail if the file exists.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6391,7 +6367,11 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x44 : /* file(s) delete */
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case 0x44 : /* 68 Erase File / wire 0x44.
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* Coverage: implemented.
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* Request: DirHandle, SearchAttributes, PathLen, Path.
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* Reply: no payload, normal Completion response.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6409,7 +6389,14 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x45 : /* rename file */
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case 0x45 : /* 69 Rename File / wire 0x45.
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* Coverage: implemented.
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* Request: DirHandle, SearchAttributes, old PathLen/Path,
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* reserved byte, new PathLen/Path.
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* Reply: no payload, normal Completion response.
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* Limitation: current code renames within the same
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* directory handle.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6430,7 +6417,12 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x46 : /* set file attributes */
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case 0x46 : /* 70 Set File Attributes / wire 0x46.
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* Coverage: implemented.
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* Request: FileAttributes, DirHandle, SearchAttributes,
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* PathLen, Path.
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* Reply: no payload, normal Completion response.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6449,8 +6441,13 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x47 : /* move pointer to end of file ???? */
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/* and return filesize ? */
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case 0x47 : /* 71 Get Current Size of File / wire 0x47.
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* Coverage: implemented.
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* Request: reserved byte plus old six-byte FileHandle slot.
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* Reply: four-byte size/position in Hi-Lo order.
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* Difference: the two extended handle bytes are ignored;
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* current code seeks the local four-byte handle to EOF.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6471,7 +6468,16 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x48 : /* read file */
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case 0x48 : /* 72 Read From a File / wire 0x48.
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* Coverage: implemented.
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* Request: reserved byte, old six-byte FileHandle slot,
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* Offset Hi-Lo, MaxBytes Hi-Lo.
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* Reply: BytesRead Hi-Lo plus data.
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* Compatibility: preserves the documented odd-offset
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* padding quirk by inserting one byte before returned data
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* when the offset is odd.
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* Difference: extended handle bytes are ignored.
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*/
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{
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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@@ -6506,7 +6512,13 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x49 : { /* write file */
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case 0x49 : { /* 73 Write to a File / wire 0x49.
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* Coverage: implemented.
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* Request: reserved byte, old six-byte FileHandle slot,
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* Offset Hi-Lo, BytesToWrite Hi-Lo, data.
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* Reply: no payload, normal Completion response.
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* Difference: extended handle bytes are ignored.
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*/
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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uint8 filler; /* 0 Filler ?? */
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@@ -6531,8 +6543,15 @@ static int handle_ncp_serv(void)
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break;
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case 0x4a : { /* File SERVER COPY */
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/* should be OK */
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case 0x4a : { /* 74 Copy from One File to Another / wire 0x4a.
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* Coverage: implemented.
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* Request: reserved byte, old source/destination
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* FileHandle slots, source/destination offsets Hi-Lo,
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* CopySize Hi-Lo.
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* Reply: four-byte actual transfer count.
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* Difference: extended handle bytes are ignored for both
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* source and destination handles.
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*/
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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uint8 reserved; /* Reserved by Novell */
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@@ -6564,7 +6583,13 @@ static int handle_ncp_serv(void)
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break;
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case 0x4b : { /* set date of file, file will be closed later */
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case 0x4b : { /* 75 Set File Time Date Stamp / wire 0x4b.
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* Coverage: implemented.
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* Request: reserved byte, old six-byte FileHandle slot,
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* DOS Time, DOS Date.
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* Reply: no payload, normal Completion response.
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* Difference: extended handle bytes are ignored.
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*/
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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uint8 filler;
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@@ -6579,7 +6604,14 @@ static int handle_ncp_serv(void)
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}
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break;
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case 0x4c : { /* open file */
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case 0x4c : { /* 76 Open File / wire 0x4c.
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* Coverage: implemented.
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* Request: DirHandle, SearchAttributes,
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* DesiredAccessRights, PathLen, Path.
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* Reply: six-byte old FileHandle slot, Reserved,
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* NW_FILE_INFO. Current code writes zero extended
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* handle bytes and a local four-byte handle.
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*/
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struct INPUT {
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uint8 header[7]; /* Requestheader */
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uint8 dirhandle; /* Dirhandle */
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