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36facd71b5
Move functions/macros dealing with request parsing or reply assembly/write out of the big dix_priv.h into their own headers. This new header will also get more of those function/macros soon (yet still in the pipeline). Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/* SPDX-License-Identifier: MIT OR X11
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*
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* Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
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*/
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#ifndef _XSERVER_DIX_REQUEST_PRIV_H
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#define _XSERVER_DIX_REQUEST_PRIV_H
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#include <X11/Xproto.h>
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#include "dix/rpcbuf_priv.h" /* x_rpcbuf_t */
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#include "include/dix.h"
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#include "include/dixstruct.h"
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#include "include/misc.h" /* bytes_to_int32 */
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#include "include/os.h" /* WriteToClient */
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/*
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* @brief write rpc buffer to client and then clear it
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*
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* @param pClient the client to write buffer to
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* @param rpcbuf the buffer whose contents will be written
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* @return the result of WriteToClient() call
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*/
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static inline ssize_t WriteRpcbufToClient(ClientPtr pClient,
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x_rpcbuf_t *rpcbuf) {
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/* explicitly casting between (s)size_t and int - should be safe,
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since payloads are always small enough to easily fit into int. */
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ssize_t ret = WriteToClient(pClient,
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(int)rpcbuf->wpos,
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rpcbuf->buffer);
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x_rpcbuf_clear(rpcbuf);
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return ret;
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}
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/* compute the amount of extra units a reply header needs.
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*
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* all reply header structs are at least the size of xGenericReply
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* we have to count how many units the header is bigger than xGenericReply
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*
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*/
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#define X_REPLY_HEADER_UNITS(hdrtype) \
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(bytes_to_int32((sizeof(hdrtype) - sizeof(xGenericReply))))
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static inline int __write_reply_hdr_and_rpcbuf(
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ClientPtr pClient, void *hdrData, size_t hdrLen, x_rpcbuf_t *rpcbuf)
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{
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if (rpcbuf->error)
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return BadAlloc;
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xGenericReply *reply = hdrData;
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reply->type = X_Reply;
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reply->length = (bytes_to_int32(hdrLen - sizeof(xGenericReply)))
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+ x_rpcbuf_wsize_units(rpcbuf);
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reply->sequenceNumber = (CARD16)pClient->sequence; /* shouldn't go above 64k */
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if (pClient->swapped) {
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swaps(&reply->sequenceNumber);
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swapl(&reply->length);
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}
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WriteToClient(pClient, (int)hdrLen, hdrData);
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WriteRpcbufToClient(pClient, rpcbuf);
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return Success;
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}
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static inline int __write_reply_hdr_simple(
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ClientPtr pClient, void *hdrData, size_t hdrLen)
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{
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xGenericReply *reply = hdrData;
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reply->type = X_Reply;
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reply->length = (bytes_to_int32(hdrLen - sizeof(xGenericReply)));
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reply->sequenceNumber = (CARD16)pClient->sequence; /* shouldn't go above 64k */
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if (pClient->swapped) {
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swaps(&reply->sequenceNumber);
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swapl(&reply->length);
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}
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WriteToClient(pClient, (int)hdrLen, hdrData);
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return Success;
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}
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/*
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* send reply with header struct (not pointer!) along with rpcbuf payload
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*
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* @param client pointer to the client (ClientPtr)
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* @param hdrstruct the header struct (not pointer, the struct itself!)
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* @param rpcbuf the rpcbuf to send (not pointer, the struct itself!)
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* return X11 result code
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*/
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#define X_SEND_REPLY_WITH_RPCBUF(client, hdrstruct, rpcbuf) \
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__write_reply_hdr_and_rpcbuf(client, &(hdrstruct), sizeof(hdrstruct), &(rpcbuf));
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/*
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* send reply with header struct (not pointer!) without any payload
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*
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* @param client pointer to the client (ClientPtr)
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* @param hdrstruct the header struct (not pointer, the struct itself!)
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* @return X11 result code (=Success)
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*/
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#define X_SEND_REPLY_SIMPLE(client, hdrstruct) \
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__write_reply_hdr_simple(client, &(hdrstruct), sizeof(hdrstruct));
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#endif /* _XSERVER_DIX_REQUEST_PRIV_H */
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