294 lines
7.3 KiB
C
294 lines
7.3 KiB
C
/*****************************************************************************
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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) 2000, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* In order to be useful for every potential user, curl and libcurl are
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* dual-licensed under the MPL and the MIT/X-derivate licenses.
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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 MPL or the MIT/X-derivate
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* licenses. You may pick one of these licenses.
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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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* $Id$
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*****************************************************************************/
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#include "setup.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
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#include <winsock.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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#define _MPRINTF_REPLACE /* use the internal *printf() functions */
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#include <curl/mprintf.h>
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#ifdef KRB4
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#include "security.h"
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#endif
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#include <string.h>
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/* The last #include file should be: */
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#ifdef MALLOCDEBUG
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#include "memdebug.h"
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#endif
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/* returns last node in linked list */
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static struct curl_slist *slist_get_last(struct curl_slist *list)
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{
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struct curl_slist *item;
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/* if caller passed us a NULL, return now */
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if (!list)
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return NULL;
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/* loop through to find the last item */
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item = list;
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while (item->next) {
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item = item->next;
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}
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return item;
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}
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/* append a struct to the linked list. It always retunrs the address of the
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* first record, so that you can sure this function as an initialization
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* function as well as an append function. If you find this bothersome,
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* then simply create a separate _init function and call it appropriately from
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* within the proram. */
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struct curl_slist *curl_slist_append(struct curl_slist *list,
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const char *data)
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{
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struct curl_slist *last;
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struct curl_slist *new_item;
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new_item = (struct curl_slist *) malloc(sizeof(struct curl_slist));
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if (new_item) {
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new_item->next = NULL;
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new_item->data = strdup(data);
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}
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else {
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fprintf(stderr, "Cannot allocate memory for QUOTE list.\n");
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return NULL;
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}
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if (list) {
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last = slist_get_last(list);
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last->next = new_item;
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return list;
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}
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/* if this is the first item, then new_item *is* the list */
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return new_item;
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}
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/* be nice and clean up resources */
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void curl_slist_free_all(struct curl_slist *list)
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{
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struct curl_slist *next;
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struct curl_slist *item;
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if (!list)
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return;
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item = list;
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do {
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next = item->next;
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if (item->data) {
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free(item->data);
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}
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free(item);
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item = next;
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} while (next);
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}
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/* Curl_infof() is for info message along the way */
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void Curl_infof(struct SessionHandle *data, const char *fmt, ...)
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{
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va_list ap;
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if(data->set.verbose) {
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va_start(ap, fmt);
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fputs("* ", data->set.err);
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vfprintf(data->set.err, fmt, ap);
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va_end(ap);
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}
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}
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/* Curl_failf() is for messages stating why we failed, the LAST one will be
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returned for the user (if requested) */
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void Curl_failf(struct SessionHandle *data, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if(data->set.errorbuffer)
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vsnprintf(data->set.errorbuffer, CURL_ERROR_SIZE, fmt, ap);
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va_end(ap);
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}
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/* Curl_sendf() sends formated data to the server */
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size_t Curl_sendf(int sockfd, struct connectdata *conn,
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const char *fmt, ...)
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{
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struct SessionHandle *data = conn->data;
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size_t bytes_written;
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char *s;
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va_list ap;
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va_start(ap, fmt);
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s = vaprintf(fmt, ap); /* returns an allocated string */
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va_end(ap);
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if(!s)
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return 0; /* failure */
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if(data->set.verbose)
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fprintf(data->set.err, "> %s", s);
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/* Write the buffer to the socket */
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Curl_write(conn, sockfd, s, strlen(s), &bytes_written);
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free(s); /* free the output string */
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return bytes_written;
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}
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/*
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* Curl_write() is an internal write function that sends plain (binary) data
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* to the server. Works with plain sockets, SSL or kerberos.
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*
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*/
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CURLcode Curl_write(struct connectdata *conn, int sockfd,
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void *mem, size_t len,
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size_t *written)
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{
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size_t bytes_written;
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#ifdef USE_SSLEAY
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/* SSL_write() is said to return 'int' while write() and send() returns
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'size_t' */
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int ssl_bytes;
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if (conn->ssl.use) {
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int loop=100; /* just a precaution to never loop endlessly */
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while(loop--) {
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ssl_bytes = SSL_write(conn->ssl.handle, mem, len);
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if((0 >= ssl_bytes) ||
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(SSL_ERROR_WANT_WRITE != SSL_get_error(conn->ssl.handle,
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ssl_bytes) )) {
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/* this converts from signed to unsigned... */
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bytes_written = ssl_bytes;
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break;
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}
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}
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}
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else {
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#endif
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#ifdef KRB4
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if(conn->sec_complete) {
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bytes_written = Curl_sec_write(conn, sockfd, mem, len);
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}
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else
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#endif /* KRB4 */
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bytes_written = swrite(sockfd, mem, len);
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#ifdef USE_SSLEAY
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}
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#endif
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*written = bytes_written;
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return CURLE_OK;
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}
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/* 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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*/
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CURLcode Curl_client_write(struct SessionHandle *data,
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int type,
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char *ptr,
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size_t len)
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{
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size_t wrote;
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if(0 == len)
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len = strlen(ptr);
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if(type & CLIENTWRITE_BODY) {
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wrote = data->set.fwrite(ptr, 1, len, data->set.out);
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if(wrote != len) {
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failf (data, "Failed writing body");
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return CURLE_WRITE_ERROR;
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}
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}
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if((type & CLIENTWRITE_HEADER) &&
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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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curl_write_callback writeit=
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data->set.fwrite_header?data->set.fwrite_header:data->set.fwrite;
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wrote = writeit(ptr, 1, len, data->set.writeheader);
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if(wrote != len) {
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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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/*
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* Internal read-from-socket function. This is meant to deal with plain
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* sockets, SSL sockets and kerberos sockets.
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*/
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CURLcode Curl_read(struct connectdata *conn, int sockfd,
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char *buf, size_t buffersize,
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ssize_t *n)
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{
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ssize_t nread;
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#ifdef USE_SSLEAY
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if (conn->ssl.use) {
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int loop=100; /* just a precaution to never loop endlessly */
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while(loop--) {
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nread = SSL_read(conn->ssl.handle, buf, buffersize);
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if((-1 != nread) ||
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(SSL_ERROR_WANT_READ != SSL_get_error(conn->ssl.handle, nread) ))
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break;
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}
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}
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else {
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#endif
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#ifdef KRB4
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if(conn->sec_complete)
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nread = Curl_sec_read(conn, sockfd, buf, buffersize);
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else
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#endif
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nread = sread (sockfd, buf, buffersize);
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#ifdef USE_SSLEAY
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}
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#endif /* USE_SSLEAY */
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*n = nread;
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return CURLE_OK;
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}
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