803 lines
23 KiB
C
803 lines
23 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_LINUX_TCP_H
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#include <linux/tcp.h>
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#elif defined(HAVE_NETINET_TCP_H)
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#include <netinet/tcp.h>
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#endif
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#include <curl/curl.h>
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#include "urldata.h"
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#include "sendf.h"
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#include "cfilters.h"
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#include "connect.h"
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#include "content_encoding.h"
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#include "vtls/vtls.h"
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#include "vssh/ssh.h"
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#include "easyif.h"
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#include "multiif.h"
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#include "strerror.h"
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#include "select.h"
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#include "strdup.h"
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#include "http2.h"
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#include "headers.h"
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#include "progress.h"
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#include "ws.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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static CURLcode do_init_stack(struct Curl_easy *data);
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#if defined(CURL_DO_LINEEND_CONV) && !defined(CURL_DISABLE_FTP)
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/*
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* convert_lineends() changes CRLF (\r\n) end-of-line markers to a single LF
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* (\n), with special processing for CRLF sequences that are split between two
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* blocks of data. Remaining, bare CRs are changed to LFs. The possibly new
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* size of the data is returned.
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*/
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static size_t convert_lineends(struct Curl_easy *data,
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char *startPtr, size_t size)
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{
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char *inPtr, *outPtr;
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/* sanity check */
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if(!startPtr || (size < 1)) {
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return size;
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}
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if(data->state.prev_block_had_trailing_cr) {
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/* The previous block of incoming data
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had a trailing CR, which was turned into a LF. */
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if(*startPtr == '\n') {
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/* This block of incoming data starts with the
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previous block's LF so get rid of it */
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memmove(startPtr, startPtr + 1, size-1);
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size--;
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/* and it wasn't a bare CR but a CRLF conversion instead */
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data->state.crlf_conversions++;
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}
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data->state.prev_block_had_trailing_cr = FALSE; /* reset the flag */
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}
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/* find 1st CR, if any */
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inPtr = outPtr = memchr(startPtr, '\r', size);
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if(inPtr) {
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/* at least one CR, now look for CRLF */
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while(inPtr < (startPtr + size-1)) {
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/* note that it's size-1, so we'll never look past the last byte */
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if(memcmp(inPtr, "\r\n", 2) == 0) {
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/* CRLF found, bump past the CR and copy the NL */
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inPtr++;
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*outPtr = *inPtr;
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/* keep track of how many CRLFs we converted */
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data->state.crlf_conversions++;
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}
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else {
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if(*inPtr == '\r') {
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/* lone CR, move LF instead */
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*outPtr = '\n';
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}
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else {
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/* not a CRLF nor a CR, just copy whatever it is */
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*outPtr = *inPtr;
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}
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}
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outPtr++;
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inPtr++;
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} /* end of while loop */
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if(inPtr < startPtr + size) {
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/* handle last byte */
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if(*inPtr == '\r') {
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/* deal with a CR at the end of the buffer */
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*outPtr = '\n'; /* copy a NL instead */
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/* note that a CRLF might be split across two blocks */
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data->state.prev_block_had_trailing_cr = TRUE;
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}
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else {
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/* copy last byte */
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*outPtr = *inPtr;
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}
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outPtr++;
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}
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if(outPtr < startPtr + size)
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/* tidy up by null terminating the now shorter data */
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*outPtr = '\0';
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return (outPtr - startPtr);
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}
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return size;
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}
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#endif /* CURL_DO_LINEEND_CONV && !CURL_DISABLE_FTP */
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/*
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* Curl_nwrite() is an internal write function that sends data to the
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* server. Works with a socket index for the connection.
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*
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* If the write would block (CURLE_AGAIN), it returns CURLE_OK and
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* (*nwritten == 0). Otherwise we return regular CURLcode value.
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*/
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CURLcode Curl_nwrite(struct Curl_easy *data,
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int sockindex,
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const void *buf,
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size_t blen,
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ssize_t *pnwritten)
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{
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ssize_t nwritten;
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CURLcode result = CURLE_OK;
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struct connectdata *conn;
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DEBUGASSERT(sockindex >= 0 && sockindex < 2);
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DEBUGASSERT(pnwritten);
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DEBUGASSERT(data);
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DEBUGASSERT(data->conn);
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conn = data->conn;
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#ifdef CURLDEBUG
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{
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/* Allow debug builds to override this logic to force short sends
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*/
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char *p = getenv("CURL_SMALLSENDS");
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if(p) {
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size_t altsize = (size_t)strtoul(p, NULL, 10);
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if(altsize)
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blen = CURLMIN(blen, altsize);
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}
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}
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#endif
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nwritten = conn->send[sockindex](data, sockindex, buf, blen, &result);
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if(result == CURLE_AGAIN) {
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nwritten = 0;
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result = CURLE_OK;
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}
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else if(result) {
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nwritten = -1; /* make sure */
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}
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else {
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DEBUGASSERT(nwritten >= 0);
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}
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*pnwritten = nwritten;
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return result;
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}
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/*
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* Curl_write() is an internal write function that sends data to the
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* server. Works with plain sockets, SCP, SSL or kerberos.
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*
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* If the write would block (CURLE_AGAIN), we return CURLE_OK and
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* (*written == 0). Otherwise we return regular CURLcode value.
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*/
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CURLcode Curl_write(struct Curl_easy *data,
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curl_socket_t sockfd,
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const void *mem,
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size_t len,
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ssize_t *written)
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{
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struct connectdata *conn;
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int num;
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DEBUGASSERT(data);
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DEBUGASSERT(data->conn);
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conn = data->conn;
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num = (sockfd != CURL_SOCKET_BAD && sockfd == conn->sock[SECONDARYSOCKET]);
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return Curl_nwrite(data, num, mem, len, written);
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}
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static CURLcode pausewrite(struct Curl_easy *data,
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int type, /* what type of data */
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bool paused_body,
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const char *ptr,
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size_t len)
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{
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/* signalled to pause sending on this connection, but since we have data
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we want to send we need to dup it to save a copy for when the sending
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is again enabled */
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struct SingleRequest *k = &data->req;
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struct UrlState *s = &data->state;
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unsigned int i;
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bool newtype = TRUE;
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Curl_conn_ev_data_pause(data, TRUE);
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if(s->tempcount) {
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for(i = 0; i< s->tempcount; i++) {
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if(s->tempwrite[i].type == type &&
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!!s->tempwrite[i].paused_body == !!paused_body) {
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/* data for this type exists */
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newtype = FALSE;
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break;
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}
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}
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DEBUGASSERT(i < 3);
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if(i >= 3)
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/* There are more types to store than what fits: very bad */
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return CURLE_OUT_OF_MEMORY;
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}
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else
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i = 0;
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if(newtype) {
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/* store this information in the state struct for later use */
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Curl_dyn_init(&s->tempwrite[i].b, DYN_PAUSE_BUFFER);
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s->tempwrite[i].type = type;
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s->tempwrite[i].paused_body = paused_body;
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s->tempcount++;
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}
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if(Curl_dyn_addn(&s->tempwrite[i].b, (unsigned char *)ptr, len))
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return CURLE_OUT_OF_MEMORY;
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/* mark the connection as RECV paused */
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k->keepon |= KEEP_RECV_PAUSE;
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return CURLE_OK;
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}
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/* chop_write() writes chunks of data not larger than CURL_MAX_WRITE_SIZE via
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* client write callback(s) and takes care of pause requests from the
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* callbacks.
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*/
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static CURLcode chop_write(struct Curl_easy *data,
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int type,
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bool skip_body_write,
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char *optr,
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size_t olen)
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{
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struct connectdata *conn = data->conn;
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curl_write_callback writeheader = NULL;
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curl_write_callback writebody = NULL;
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char *ptr = optr;
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size_t len = olen;
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void *writebody_ptr = data->set.out;
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if(!len)
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return CURLE_OK;
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/* If reading is paused, append this data to the already held data for this
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type. */
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if(data->req.keepon & KEEP_RECV_PAUSE)
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return pausewrite(data, type, !skip_body_write, ptr, len);
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/* Determine the callback(s) to use. */
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if(!skip_body_write &&
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((type & CLIENTWRITE_BODY) ||
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((type & CLIENTWRITE_HEADER) && data->set.include_header))) {
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#ifdef USE_WEBSOCKETS
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if(conn->handler->protocol & (CURLPROTO_WS|CURLPROTO_WSS)) {
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writebody = Curl_ws_writecb;
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writebody_ptr = data;
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}
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else
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#endif
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writebody = data->set.fwrite_func;
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}
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if((type & (CLIENTWRITE_HEADER|CLIENTWRITE_INFO)) &&
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(data->set.fwrite_header || data->set.writeheader)) {
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/*
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* Write headers to the same callback or to the especially setup
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* header callback function (added after version 7.7.1).
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*/
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writeheader =
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data->set.fwrite_header? data->set.fwrite_header: data->set.fwrite_func;
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}
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/* Chop data, write chunks. */
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while(len) {
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size_t chunklen = len <= CURL_MAX_WRITE_SIZE? len: CURL_MAX_WRITE_SIZE;
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if(writebody) {
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size_t wrote;
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Curl_set_in_callback(data, true);
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wrote = writebody(ptr, 1, chunklen, writebody_ptr);
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Curl_set_in_callback(data, false);
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if(CURL_WRITEFUNC_PAUSE == wrote) {
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if(conn->handler->flags & PROTOPT_NONETWORK) {
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/* Protocols that work without network cannot be paused. This is
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actually only FILE:// just now, and it can't pause since the
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transfer isn't done using the "normal" procedure. */
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failf(data, "Write callback asked for PAUSE when not supported");
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return CURLE_WRITE_ERROR;
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}
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return pausewrite(data, type, TRUE, ptr, len);
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}
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if(wrote != chunklen) {
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failf(data, "Failure writing output to destination");
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return CURLE_WRITE_ERROR;
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}
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}
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ptr += chunklen;
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len -= chunklen;
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}
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#ifndef CURL_DISABLE_HTTP
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/* HTTP header, but not status-line */
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if((conn->handler->protocol & PROTO_FAMILY_HTTP) &&
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(type & CLIENTWRITE_HEADER) && !(type & CLIENTWRITE_STATUS) ) {
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unsigned char htype = (unsigned char)
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(type & CLIENTWRITE_CONNECT ? CURLH_CONNECT :
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(type & CLIENTWRITE_1XX ? CURLH_1XX :
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(type & CLIENTWRITE_TRAILER ? CURLH_TRAILER :
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CURLH_HEADER)));
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CURLcode result = Curl_headers_push(data, optr, htype);
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if(result)
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return result;
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}
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#endif
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if(writeheader) {
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size_t wrote;
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Curl_set_in_callback(data, true);
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wrote = writeheader(optr, 1, olen, data->set.writeheader);
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Curl_set_in_callback(data, false);
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if(CURL_WRITEFUNC_PAUSE == wrote)
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return pausewrite(data, type, FALSE, optr, olen);
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if(wrote != olen) {
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failf(data, "Failed writing header");
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return CURLE_WRITE_ERROR;
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}
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}
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return CURLE_OK;
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}
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/* Curl_client_write() sends data to the write callback(s)
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The bit pattern defines to what "streams" to write to. Body and/or header.
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The defines are in sendf.h of course.
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If CURL_DO_LINEEND_CONV is enabled, data is converted IN PLACE to the
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local character encoding. This is a problem and should be changed in
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the future to leave the original data alone.
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*/
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CURLcode Curl_client_write(struct Curl_easy *data,
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int type, char *buf, size_t blen)
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{
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CURLcode result;
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#if !defined(CURL_DISABLE_FTP) && defined(CURL_DO_LINEEND_CONV)
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/* FTP data may need conversion. */
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if((type & CLIENTWRITE_BODY) &&
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(data->conn->handler->protocol & PROTO_FAMILY_FTP) &&
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data->conn->proto.ftpc.transfertype == 'A') {
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/* convert end-of-line markers */
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blen = convert_lineends(data, buf, blen);
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}
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#endif
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/* it is one of those, at least */
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DEBUGASSERT(type & (CLIENTWRITE_BODY|CLIENTWRITE_HEADER|CLIENTWRITE_INFO));
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/* BODY is only BODY */
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DEBUGASSERT(!(type & CLIENTWRITE_BODY) || (type == CLIENTWRITE_BODY));
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/* INFO is only INFO */
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DEBUGASSERT(!(type & CLIENTWRITE_INFO) || (type == CLIENTWRITE_INFO));
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if(!data->req.writer_stack) {
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result = do_init_stack(data);
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if(result)
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return result;
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DEBUGASSERT(data->req.writer_stack);
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}
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return Curl_cwriter_write(data, data->req.writer_stack, type, buf, blen);
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}
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CURLcode Curl_client_unpause(struct Curl_easy *data)
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{
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CURLcode result = CURLE_OK;
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if(data->state.tempcount) {
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/* there are buffers for sending that can be delivered as the receive
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pausing is lifted! */
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unsigned int i;
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unsigned int count = data->state.tempcount;
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struct tempbuf writebuf[3]; /* there can only be three */
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/* copy the structs to allow for immediate re-pausing */
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||
|
for(i = 0; i < data->state.tempcount; i++) {
|
||
|
writebuf[i] = data->state.tempwrite[i];
|
||
|
Curl_dyn_init(&data->state.tempwrite[i].b, DYN_PAUSE_BUFFER);
|
||
|
}
|
||
|
data->state.tempcount = 0;
|
||
|
|
||
|
for(i = 0; i < count; i++) {
|
||
|
/* even if one function returns error, this loops through and frees
|
||
|
all buffers */
|
||
|
if(!result)
|
||
|
result = chop_write(data, writebuf[i].type,
|
||
|
!writebuf[i].paused_body,
|
||
|
Curl_dyn_ptr(&writebuf[i].b),
|
||
|
Curl_dyn_len(&writebuf[i].b));
|
||
|
Curl_dyn_free(&writebuf[i].b);
|
||
|
}
|
||
|
}
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
void Curl_client_cleanup(struct Curl_easy *data)
|
||
|
{
|
||
|
struct Curl_cwriter *writer = data->req.writer_stack;
|
||
|
size_t i;
|
||
|
|
||
|
while(writer) {
|
||
|
data->req.writer_stack = writer->next;
|
||
|
writer->cwt->do_close(data, writer);
|
||
|
free(writer);
|
||
|
writer = data->req.writer_stack;
|
||
|
}
|
||
|
|
||
|
for(i = 0; i < data->state.tempcount; i++) {
|
||
|
Curl_dyn_free(&data->state.tempwrite[i].b);
|
||
|
}
|
||
|
data->state.tempcount = 0;
|
||
|
data->req.bytecount = 0;
|
||
|
data->req.headerline = 0;
|
||
|
}
|
||
|
|
||
|
/* Write data using an unencoding writer stack. "nbytes" is not
|
||
|
allowed to be 0. */
|
||
|
CURLcode Curl_cwriter_write(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer, int type,
|
||
|
const char *buf, size_t nbytes)
|
||
|
{
|
||
|
if(!nbytes)
|
||
|
return CURLE_OK;
|
||
|
if(!writer)
|
||
|
return CURLE_WRITE_ERROR;
|
||
|
return writer->cwt->do_write(data, writer, type, buf, nbytes);
|
||
|
}
|
||
|
|
||
|
CURLcode Curl_cwriter_def_init(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer)
|
||
|
{
|
||
|
(void)data;
|
||
|
(void)writer;
|
||
|
return CURLE_OK;
|
||
|
}
|
||
|
|
||
|
CURLcode Curl_cwriter_def_write(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer, int type,
|
||
|
const char *buf, size_t nbytes)
|
||
|
{
|
||
|
return Curl_cwriter_write(data, writer->next, type, buf, nbytes);
|
||
|
}
|
||
|
|
||
|
void Curl_cwriter_def_close(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer)
|
||
|
{
|
||
|
(void) data;
|
||
|
(void) writer;
|
||
|
}
|
||
|
|
||
|
/* Real client writer to installed callbacks. */
|
||
|
static CURLcode cw_client_write(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer, int type,
|
||
|
const char *buf, size_t nbytes)
|
||
|
{
|
||
|
(void)writer;
|
||
|
if(!nbytes)
|
||
|
return CURLE_OK;
|
||
|
return chop_write(data, type, FALSE, (char *)buf, nbytes);
|
||
|
}
|
||
|
|
||
|
static const struct Curl_cwtype cw_client = {
|
||
|
"client",
|
||
|
NULL,
|
||
|
Curl_cwriter_def_init,
|
||
|
cw_client_write,
|
||
|
Curl_cwriter_def_close,
|
||
|
sizeof(struct Curl_cwriter)
|
||
|
};
|
||
|
|
||
|
static size_t get_max_body_write_len(struct Curl_easy *data, curl_off_t limit)
|
||
|
{
|
||
|
if(limit != -1) {
|
||
|
/* How much more are we allowed to write? */
|
||
|
curl_off_t remain_diff;
|
||
|
remain_diff = limit - data->req.bytecount;
|
||
|
if(remain_diff < 0) {
|
||
|
/* already written too much! */
|
||
|
return 0;
|
||
|
}
|
||
|
#if SIZEOF_CURL_OFF_T > SIZEOF_SIZE_T
|
||
|
else if(remain_diff > SSIZE_T_MAX) {
|
||
|
return SIZE_T_MAX;
|
||
|
}
|
||
|
#endif
|
||
|
else {
|
||
|
return (size_t)remain_diff;
|
||
|
}
|
||
|
}
|
||
|
return SIZE_T_MAX;
|
||
|
}
|
||
|
|
||
|
/* Download client writer in phase CURL_CW_PROTOCOL that
|
||
|
* sees the "real" download body data. */
|
||
|
static CURLcode cw_download_write(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer, int type,
|
||
|
const char *buf, size_t nbytes)
|
||
|
{
|
||
|
CURLcode result;
|
||
|
size_t nwrite, excess_len = 0;
|
||
|
const char *excess_data = NULL;
|
||
|
|
||
|
if(!(type & CLIENTWRITE_BODY)) {
|
||
|
if((type & CLIENTWRITE_CONNECT) && data->set.suppress_connect_headers)
|
||
|
return CURLE_OK;
|
||
|
return Curl_cwriter_write(data, writer->next, type, buf, nbytes);
|
||
|
}
|
||
|
|
||
|
nwrite = nbytes;
|
||
|
if(-1 != data->req.maxdownload) {
|
||
|
size_t wmax = get_max_body_write_len(data, data->req.maxdownload);
|
||
|
if(nwrite > wmax) {
|
||
|
excess_len = nbytes - wmax;
|
||
|
nwrite = wmax;
|
||
|
excess_data = buf + nwrite;
|
||
|
}
|
||
|
|
||
|
if(nwrite == wmax) {
|
||
|
data->req.download_done = TRUE;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if(data->set.max_filesize) {
|
||
|
size_t wmax = get_max_body_write_len(data, data->set.max_filesize);
|
||
|
if(nwrite > wmax) {
|
||
|
nwrite = wmax;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
data->req.bytecount += nwrite;
|
||
|
++data->req.bodywrites;
|
||
|
if(!data->req.ignorebody && nwrite) {
|
||
|
result = Curl_cwriter_write(data, writer->next, type, buf, nwrite);
|
||
|
if(result)
|
||
|
return result;
|
||
|
}
|
||
|
result = Curl_pgrsSetDownloadCounter(data, data->req.bytecount);
|
||
|
if(result)
|
||
|
return result;
|
||
|
|
||
|
if(excess_len) {
|
||
|
if(data->conn->handler->readwrite) {
|
||
|
/* RTSP hack moved from transfer loop to here */
|
||
|
bool readmore = FALSE; /* indicates data is incomplete, need more */
|
||
|
size_t consumed = 0;
|
||
|
result = data->conn->handler->readwrite(data, data->conn,
|
||
|
excess_data, excess_len,
|
||
|
&consumed, &readmore);
|
||
|
if(result)
|
||
|
return result;
|
||
|
DEBUGASSERT(consumed <= excess_len);
|
||
|
excess_len -= consumed;
|
||
|
if(readmore) {
|
||
|
data->req.download_done = FALSE;
|
||
|
data->req.keepon |= KEEP_RECV; /* we're not done reading */
|
||
|
}
|
||
|
}
|
||
|
if(excess_len && !data->req.ignorebody) {
|
||
|
infof(data,
|
||
|
"Excess found writing body:"
|
||
|
" excess = %zu"
|
||
|
", size = %" CURL_FORMAT_CURL_OFF_T
|
||
|
", maxdownload = %" CURL_FORMAT_CURL_OFF_T
|
||
|
", bytecount = %" CURL_FORMAT_CURL_OFF_T,
|
||
|
excess_len, data->req.size, data->req.maxdownload,
|
||
|
data->req.bytecount);
|
||
|
connclose(data->conn, "excess found in a read");
|
||
|
}
|
||
|
}
|
||
|
else if(nwrite < nbytes) {
|
||
|
failf(data, "Exceeded the maximum allowed file size "
|
||
|
"(%" CURL_FORMAT_CURL_OFF_T ") with %"
|
||
|
CURL_FORMAT_CURL_OFF_T " bytes",
|
||
|
data->set.max_filesize, data->req.bytecount);
|
||
|
return CURLE_FILESIZE_EXCEEDED;
|
||
|
}
|
||
|
|
||
|
return CURLE_OK;
|
||
|
}
|
||
|
|
||
|
static const struct Curl_cwtype cw_download = {
|
||
|
"download",
|
||
|
NULL,
|
||
|
Curl_cwriter_def_init,
|
||
|
cw_download_write,
|
||
|
Curl_cwriter_def_close,
|
||
|
sizeof(struct Curl_cwriter)
|
||
|
};
|
||
|
|
||
|
/* RAW client writer in phase CURL_CW_RAW that
|
||
|
* enabled tracing of raw data. */
|
||
|
static CURLcode cw_raw_write(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer, int type,
|
||
|
const char *buf, size_t nbytes)
|
||
|
{
|
||
|
if(type & CLIENTWRITE_BODY && data->set.verbose && !data->req.ignorebody) {
|
||
|
Curl_debug(data, CURLINFO_DATA_IN, (char *)buf, nbytes);
|
||
|
}
|
||
|
return Curl_cwriter_write(data, writer->next, type, buf, nbytes);
|
||
|
}
|
||
|
|
||
|
static const struct Curl_cwtype cw_raw = {
|
||
|
"raw",
|
||
|
NULL,
|
||
|
Curl_cwriter_def_init,
|
||
|
cw_raw_write,
|
||
|
Curl_cwriter_def_close,
|
||
|
sizeof(struct Curl_cwriter)
|
||
|
};
|
||
|
|
||
|
/* Create an unencoding writer stage using the given handler. */
|
||
|
CURLcode Curl_cwriter_create(struct Curl_cwriter **pwriter,
|
||
|
struct Curl_easy *data,
|
||
|
const struct Curl_cwtype *cwt,
|
||
|
Curl_cwriter_phase phase)
|
||
|
{
|
||
|
struct Curl_cwriter *writer;
|
||
|
CURLcode result = CURLE_OUT_OF_MEMORY;
|
||
|
|
||
|
DEBUGASSERT(cwt->cwriter_size >= sizeof(struct Curl_cwriter));
|
||
|
writer = (struct Curl_cwriter *) calloc(1, cwt->cwriter_size);
|
||
|
if(!writer)
|
||
|
goto out;
|
||
|
|
||
|
writer->cwt = cwt;
|
||
|
writer->phase = phase;
|
||
|
result = cwt->do_init(data, writer);
|
||
|
|
||
|
out:
|
||
|
*pwriter = result? NULL : writer;
|
||
|
if(result)
|
||
|
free(writer);
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
void Curl_cwriter_free(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer)
|
||
|
{
|
||
|
if(writer) {
|
||
|
writer->cwt->do_close(data, writer);
|
||
|
free(writer);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
size_t Curl_cwriter_count(struct Curl_easy *data, Curl_cwriter_phase phase)
|
||
|
{
|
||
|
struct Curl_cwriter *w;
|
||
|
size_t n = 0;
|
||
|
|
||
|
for(w = data->req.writer_stack; w; w = w->next) {
|
||
|
if(w->phase == phase)
|
||
|
++n;
|
||
|
}
|
||
|
return n;
|
||
|
}
|
||
|
|
||
|
static CURLcode do_init_stack(struct Curl_easy *data)
|
||
|
{
|
||
|
struct Curl_cwriter *writer;
|
||
|
CURLcode result;
|
||
|
|
||
|
DEBUGASSERT(!data->req.writer_stack);
|
||
|
result = Curl_cwriter_create(&data->req.writer_stack,
|
||
|
data, &cw_client, CURL_CW_CLIENT);
|
||
|
if(result)
|
||
|
return result;
|
||
|
|
||
|
result = Curl_cwriter_create(&writer, data, &cw_download, CURL_CW_PROTOCOL);
|
||
|
if(result)
|
||
|
return result;
|
||
|
result = Curl_cwriter_add(data, writer);
|
||
|
if(result) {
|
||
|
Curl_cwriter_free(data, writer);
|
||
|
}
|
||
|
|
||
|
result = Curl_cwriter_create(&writer, data, &cw_raw, CURL_CW_RAW);
|
||
|
if(result)
|
||
|
return result;
|
||
|
result = Curl_cwriter_add(data, writer);
|
||
|
if(result) {
|
||
|
Curl_cwriter_free(data, writer);
|
||
|
}
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
CURLcode Curl_cwriter_add(struct Curl_easy *data,
|
||
|
struct Curl_cwriter *writer)
|
||
|
{
|
||
|
CURLcode result;
|
||
|
struct Curl_cwriter **anchor = &data->req.writer_stack;
|
||
|
|
||
|
if(!*anchor) {
|
||
|
result = do_init_stack(data);
|
||
|
if(result)
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
/* Insert the writer as first in its phase.
|
||
|
* Skip existing writers of lower phases. */
|
||
|
while(*anchor && (*anchor)->phase < writer->phase)
|
||
|
anchor = &((*anchor)->next);
|
||
|
writer->next = *anchor;
|
||
|
*anchor = writer;
|
||
|
return CURLE_OK;
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Internal read-from-socket function. This is meant to deal with plain
|
||
|
* sockets, SSL sockets and kerberos sockets.
|
||
|
*
|
||
|
* Returns a regular CURLcode value.
|
||
|
*/
|
||
|
CURLcode Curl_read(struct Curl_easy *data, /* transfer */
|
||
|
curl_socket_t sockfd, /* read from this socket */
|
||
|
char *buf, /* store read data here */
|
||
|
size_t sizerequested, /* max amount to read */
|
||
|
ssize_t *n) /* amount bytes read */
|
||
|
{
|
||
|
CURLcode result = CURLE_RECV_ERROR;
|
||
|
ssize_t nread = 0;
|
||
|
size_t bytesfromsocket = 0;
|
||
|
char *buffertofill = NULL;
|
||
|
struct connectdata *conn = data->conn;
|
||
|
|
||
|
/* Set 'num' to 0 or 1, depending on which socket that has been sent here.
|
||
|
If it is the second socket, we set num to 1. Otherwise to 0. This lets
|
||
|
us use the correct ssl handle. */
|
||
|
int num = (sockfd == conn->sock[SECONDARYSOCKET]);
|
||
|
|
||
|
*n = 0; /* reset amount to zero */
|
||
|
|
||
|
bytesfromsocket = CURLMIN(sizerequested, (size_t)data->set.buffer_size);
|
||
|
buffertofill = buf;
|
||
|
|
||
|
nread = conn->recv[num](data, num, buffertofill, bytesfromsocket, &result);
|
||
|
if(nread < 0)
|
||
|
goto out;
|
||
|
|
||
|
*n += nread;
|
||
|
result = CURLE_OK;
|
||
|
out:
|
||
|
return result;
|
||
|
}
|