url.c

/*****************************************************************************
 *                                  _   _ ____  _     
 *  Project                     ___| | | |  _ \| |    
 *                             / __| | | | |_) | |    
 *                            | (__| |_| |  _ <| |___ 
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2002, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * In order to be useful for every potential user, curl and libcurl are
 * dual-licensed under the MPL and the MIT/X-derivate licenses.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the MPL or the MIT/X-derivate
 * licenses. You may pick one of these licenses.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 *****************************************************************************/

/* -- WIN32 approved -- */

#include "setup.h"

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <errno.h>

#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
#include <winsock.h>
#include <time.h>
#include <io.h>
#else
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/resource.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <netdb.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#include <sys/ioctl.h>
#include <signal.h>

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#ifdef	VMS
#include <in.h>
#include <inet.h>
#endif

#ifndef HAVE_SELECT
#error "We can't compile without select() support!"
#endif
#ifndef HAVE_SOCKET
#error "We can't compile without socket() support!"
#endif

#endif

#include "urldata.h"
#include "netrc.h"

#include "formdata.h"
#include "base64.h"
#include "ssluse.h"
#include "hostip.h"
#include "if2ip.h"
#include "transfer.h"
#include "sendf.h"
#include "getpass.h"
#include "progress.h"
#include "cookie.h"
#include "strequal.h"
#include "escape.h"
#include "strtok.h"

/* And now for the protocols */
#include "ftp.h"
#include "dict.h"
#include "telnet.h"
#include "http.h"
#include "file.h"
#include "ldap.h"
#include "url.h"
#include "connect.h"

#include <curl/types.h>

#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
#include "inet_ntoa_r.h"
#endif

#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

#ifdef KRB4
#include "security.h"
#endif
/* The last #include file should be: */
#ifdef MALLOCDEBUG
#include "memdebug.h"
#endif

/* Local static prototypes */
static int ConnectionKillOne(struct SessionHandle *data);
static bool ConnectionExists(struct SessionHandle *data,
                             struct connectdata *needle,
                             struct connectdata **usethis);
static unsigned int ConnectionStore(struct SessionHandle *data,
                                    struct connectdata *conn);


#if !defined(WIN32)||defined(__CYGWIN32__)
#ifndef RETSIGTYPE
#define RETSIGTYPE void
#endif
static
RETSIGTYPE alarmfunc(int signal)
{
  /* this is for "-ansi -Wall -pedantic" to stop complaining!   (rabe) */
  (void)signal;
  return;
}
#endif


/*
 * This is the internal function curl_easy_cleanup() calls. This should
 * cleanup and free all resources associated with this sessionhandle.
 *
 * NOTE: if we ever add something that attempts to write to a socket or
 * similar here, we must ignore SIGPIPE first. It is currently only done
 * when curl_easy_perform() is invoked.
 */

CURLcode Curl_close(struct SessionHandle *data)
{
  /* Loop through all open connections and kill them one by one */
  while(-1 != ConnectionKillOne(data));

#ifdef USE_SSLEAY
  /* Close down all open SSL info and sessions */
  Curl_SSL_Close_All(data);
#endif

  if(data->state.auth_host)
    free(data->state.auth_host);

  if(data->change.proxy_alloc)
    free(data->change.proxy);

  if(data->change.referer_alloc)
    free(data->change.referer);

  if(data->change.url_alloc)
    free(data->change.url);

  if(data->state.headerbuff)
    free(data->state.headerbuff);

  if(data->set.cookiejar)
    /* we have a "destination" for all the cookies to get dumped to */
    Curl_cookie_output(data->cookies, data->set.cookiejar);
    
  Curl_cookie_cleanup(data->cookies);

  /* free the connection cache */
  free(data->state.connects);

  if(data->info.contenttype)
    free(data->info.contenttype);

  free(data);
  return CURLE_OK;
}

static
int my_getpass(void *clientp, const char *prompt, char* buffer, int buflen )
{
  char *retbuf;
  clientp=NULL; /* prevent compiler warning */

  retbuf = getpass_r(prompt, buffer, buflen);
  if(NULL == retbuf)
    return 1;
  else
    return 0; /* success */
}


CURLcode Curl_open(struct SessionHandle **curl)
{
  /* We don't yet support specifying the URL at this point */
  struct SessionHandle *data;
  /* Very simple start-up: alloc the struct, init it with zeroes and return */
  data = (struct SessionHandle *)malloc(sizeof(struct SessionHandle));
  if(!data)
    /* this is a very serious error */
    return CURLE_OUT_OF_MEMORY;
  
  memset(data, 0, sizeof(struct SessionHandle));

  /* We do some initial setup here, all those fields that can't be just 0 */

  data->state.headerbuff=(char*)malloc(HEADERSIZE);
  if(!data->state.headerbuff) {
    free(data); /* free the memory again */
    return CURLE_OUT_OF_MEMORY;
  }

  data->state.headersize=HEADERSIZE;

  data->set.out = stdout; /* default output to stdout */
  data->set.in  = stdin;  /* default input from stdin */
  data->set.err  = stderr;  /* default stderr to stderr */
  
  /* use fwrite as default function to store output */
  data->set.fwrite = (curl_write_callback)fwrite;

  /* use fread as default function to read input */
  data->set.fread = (curl_read_callback)fread;
  
  /* set the default passwd function */
  data->set.fpasswd = my_getpass;

  data->set.infilesize = -1; /* we don't know any size */

  data->state.current_speed = -1; /* init to negative == impossible */

  data->set.httpreq = HTTPREQ_GET; /* Default HTTP request */
  data->set.ftp_use_epsv = TRUE;   /* FTP defaults to EPSV operations */

  data->set.dns_cache_timeout = 60; /* Timeout every 60 seconds by default */
  
  /* make libcurl quiet by default: */
  data->set.hide_progress = TRUE;  /* CURLOPT_NOPROGRESS changes these */
  data->progress.flags |= PGRS_HIDE;

  /* Set the default size of the SSL session ID cache */
  data->set.ssl.numsessions = 5;

  data->set.proxyport = 1080;
  
  /* create an array with connection data struct pointers */
  data->state.numconnects = 5; /* hard-coded right now */
  data->state.connects = (struct connectdata **)
    malloc(sizeof(struct connectdata *) * data->state.numconnects);
  
  if(!data->state.connects) {
    free(data);
    return CURLE_OUT_OF_MEMORY;
  }
  
  memset(data->state.connects, 0,
         sizeof(struct connectdata *)*data->state.numconnects);

  *curl = data;

  return CURLE_OK;