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29bcba9a90
curl/lib/url.c
Daniel Stenberg 29bcba9a90 Ingo Ralf Blum's cygwin fixes
2001-01-24 14:44:05 +00:00

1648 lines
47 KiB
C
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/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2000, 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
#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 "getenv.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"
/* And now for the protocols */
#include "ftp.h"
#include "dict.h"
#include "telnet.h"
#include "http.h"
#include "file.h"
#include "ldap.h"
#include <curl/types.h>
#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
/* -- -- */
CURLcode _urlget(struct UrlData *data);
/* does nothing, returns OK */
CURLcode curl_init(void)
{
return CURLE_OK;
}
/* does nothing */
void curl_free(void)
{
}
void static urlfree(struct UrlData *data, bool totally)
{
#ifdef USE_SSLEAY
if (data->ssl.use) {
if(data->ssl.handle) {
(void)SSL_shutdown(data->ssl.handle);
SSL_set_connect_state(data->ssl.handle);
SSL_free (data->ssl.handle);
data->ssl.handle = NULL;
}
if(data->ssl.ctx) {
SSL_CTX_free (data->ssl.ctx);
data->ssl.ctx = NULL;
}
data->ssl.use = FALSE; /* get back to ordinary socket usage */
}
#endif /* USE_SSLEAY */
/* close possibly still open sockets */
if(-1 != data->secondarysocket) {
sclose(data->secondarysocket);
data->secondarysocket = -1;
}
if(-1 != data->firstsocket) {
sclose(data->firstsocket);
data->firstsocket=-1;
}
if(data->bits.proxystringalloc) {
data->bits.proxystringalloc=FALSE;;
free(data->proxy);
data->proxy=NULL;
/* Since we allocated the string the previous round, it means that we
"discovered" the proxy in the environment variables and thus we must
switch off that knowledge again... */
data->bits.httpproxy=FALSE;
}
if(data->bits.rangestringalloc) {
free(data->range);
data->range=NULL;
data->bits.rangestringalloc=0; /* free now */
}
if(data->ptr_proxyuserpwd) {
free(data->ptr_proxyuserpwd);
data->ptr_proxyuserpwd=NULL;
}
if(data->ptr_uagent) {
free(data->ptr_uagent);
data->ptr_uagent=NULL;
}
if(data->ptr_userpwd) {
free(data->ptr_userpwd);
data->ptr_userpwd=NULL;
}
if(data->ptr_rangeline) {
free(data->ptr_rangeline);
data->ptr_rangeline=NULL;
}
if(data->ptr_ref) {
free(data->ptr_ref);
data->ptr_ref=NULL;
}
if(data->ptr_cookie) {
free(data->ptr_cookie);
data->ptr_cookie=NULL;
}
if(data->ptr_host) {
free(data->ptr_host);
data->ptr_host=NULL;
}
if(totally) {
/* we let the switch decide whether we're doing a part or total
cleanup */
/* check for allocated [URL] memory to free: */
if(data->freethis)
free(data->freethis);
if(data->headerbuff)
free(data->headerbuff);
if(data->free_referer)
free(data->referer);
if(data->bits.urlstringalloc)
/* the URL is allocated, free it! */
free(data->url);
Curl_cookie_cleanup(data->cookies);
free(data);
/* global cleanup */
curl_free();
}
}
CURLcode curl_close(CURL *curl)
{
struct UrlData *data=(struct UrlData *)curl;
void *protocol = data->proto.generic;
/* total session cleanup (frees 'data' as well!)*/
urlfree(data, TRUE);
if(protocol)
free(protocol);
return CURLE_OK;
}
static
int my_getpass(void *clientp, char *prompt, char* buffer, int buflen )
{
char *retbuf;
retbuf = getpass_r(prompt, buffer, buflen);
if(NULL == retbuf)
return 1;
else
return 0; /* success */
}
CURLcode curl_open(CURL **curl, char *url)
{
/* We don't yet support specifying the URL at this point */
struct UrlData *data;
/* Very simple start-up: alloc the struct, init it with zeroes and return */
data = (struct UrlData *)malloc(sizeof(struct UrlData));
if(data) {
memset(data, 0, sizeof(struct UrlData));
data->handle = STRUCT_OPEN;
data->interf = CURLI_NORMAL; /* normal interface by default */
/* We do some initial setup here, all those fields that can't be just 0 */
data-> headerbuff=(char*)malloc(HEADERSIZE);
if(!data->headerbuff) {
free(data); /* free the memory again */
return CURLE_OUT_OF_MEMORY;
}
data-> headersize=HEADERSIZE;
data->out = stdout; /* default output to stdout */
data->in = stdin; /* default input from stdin */
data->err = stderr; /* default stderr to stderr */
data->firstsocket = -1; /* no file descriptor */
data->secondarysocket = -1; /* no file descriptor */
/* use fwrite as default function to store output */
data->fwrite = (size_t (*)(char *, size_t, size_t, FILE *))fwrite;
/* use fread as default function to read input */
data->fread = (size_t (*)(char *, size_t, size_t, FILE *))fread;
/* set the default passwd function */
data->fpasswd = my_getpass;
data->infilesize = -1; /* we don't know any size */
data->current_speed = -1; /* init to negative == impossible */
*curl = data;
return CURLE_OK;
}
/* this is a very serious error */
return CURLE_OUT_OF_MEMORY;
}
CURLcode curl_setopt(CURL *curl, CURLoption option, ...)
{
struct UrlData *data = curl;
va_list param;
char *cookiefile;
va_start(param, option);
switch(option) {
case CURLOPT_VERBOSE:
data->bits.verbose = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_HEADER:
data->bits.http_include_header = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_NOPROGRESS:
data->bits.hide_progress = va_arg(param, long)?TRUE:FALSE;
if(data->bits.hide_progress)
data->progress.flags |= PGRS_HIDE;
break;
case CURLOPT_NOBODY:
data->bits.no_body = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FAILONERROR:
data->bits.http_fail_on_error = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_UPLOAD:
data->bits.upload = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_POST:
data->bits.http_post = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FILETIME:
data->bits.get_filetime = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FTPLISTONLY:
data->bits.ftp_list_only = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FTPAPPEND:
data->bits.ftp_append = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_NETRC:
data->bits.use_netrc = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FOLLOWLOCATION:
data->bits.http_follow_location = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_FTPASCII:
data->bits.ftp_ascii = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_PUT:
data->bits.http_put = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_MUTE:
data->bits.mute = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_TIMECONDITION:
data->timecondition = va_arg(param, long);
break;
case CURLOPT_TIMEVALUE:
data->timevalue = va_arg(param, long);
break;
case CURLOPT_SSLVERSION:
data->ssl.version = va_arg(param, long);
break;
case CURLOPT_COOKIEFILE:
cookiefile = (char *)va_arg(param, void *);
if(cookiefile) {
data->cookies = Curl_cookie_init(cookiefile);
}
break;
case CURLOPT_WRITEHEADER:
data->writeheader = (FILE *)va_arg(param, FILE *);
break;
case CURLOPT_COOKIE:
data->cookie = va_arg(param, char *);
break;
case CURLOPT_ERRORBUFFER:
data->errorbuffer = va_arg(param, char *);
break;
case CURLOPT_FILE:
data->out = va_arg(param, FILE *);
break;
case CURLOPT_FTPPORT:
data->ftpport = va_arg(param, char *);
data->bits.ftp_use_port = data->ftpport?1:0;
break;
case CURLOPT_HTTPHEADER:
data->headers = va_arg(param, struct curl_slist *);
break;
case CURLOPT_CUSTOMREQUEST:
data->customrequest = va_arg(param, char *);
break;
case CURLOPT_HTTPPOST:
data->httppost = va_arg(param, struct HttpPost *);
data->bits.http_formpost = data->httppost?1:0;
break;
case CURLOPT_INFILE:
data->in = va_arg(param, FILE *);
break;
case CURLOPT_INFILESIZE:
data->infilesize = va_arg(param, long);
break;
case CURLOPT_LOW_SPEED_LIMIT:
data->low_speed_limit=va_arg(param, long);
break;
case CURLOPT_LOW_SPEED_TIME:
data->low_speed_time=va_arg(param, long);
break;
case CURLOPT_URL:
data->url = va_arg(param, char *);
break;
case CURLOPT_PORT:
data->port = va_arg(param, long);
break;
case CURLOPT_POSTFIELDS:
data->postfields = va_arg(param, char *);
break;
case CURLOPT_POSTFIELDSIZE:
data->postfieldsize = va_arg(param, long);
break;
case CURLOPT_REFERER:
data->referer = va_arg(param, char *);
data->bits.http_set_referer = (data->referer && *data->referer)?1:0;
break;
case CURLOPT_AUTOREFERER:
data->bits.http_auto_referer = va_arg(param, long)?1:0;
break;
case CURLOPT_PROXY:
data->proxy = va_arg(param, char *);
data->bits.httpproxy = data->proxy?1:0;
break;
case CURLOPT_HTTPPROXYTUNNEL:
data->bits.tunnel_thru_httpproxy = va_arg(param, long)?TRUE:FALSE;
break;
case CURLOPT_PROXYPORT:
data->proxyport = va_arg(param, long);
break;
case CURLOPT_TIMEOUT:
data->timeout = va_arg(param, long);
break;
case CURLOPT_MAXREDIRS:
data->maxredirs = va_arg(param, long);
break;
case CURLOPT_USERAGENT:
data->useragent = va_arg(param, char *);
break;
case CURLOPT_USERPWD:
data->userpwd = va_arg(param, char *);
data->bits.user_passwd = data->userpwd?1:0;
break;
case CURLOPT_POSTQUOTE:
data->postquote = va_arg(param, struct curl_slist *);
break;
case CURLOPT_PROGRESSFUNCTION:
data->fprogress = va_arg(param, curl_progress_callback);
data->progress.callback = TRUE; /* no longer internal */
break;
case CURLOPT_PROGRESSDATA:
data->progress_client = va_arg(param, void *);
break;
case CURLOPT_PASSWDFUNCTION:
data->fpasswd = va_arg(param, curl_passwd_callback);
break;
case CURLOPT_PASSWDDATA:
data->passwd_client = va_arg(param, void *);
break;
case CURLOPT_PROXYUSERPWD:
data->proxyuserpwd = va_arg(param, char *);
data->bits.proxy_user_passwd = data->proxyuserpwd?1:0;
break;
case CURLOPT_RANGE:
data->range = va_arg(param, char *);
data->bits.set_range = data->range?1:0;
break;
case CURLOPT_RESUME_FROM:
data->resume_from = va_arg(param, long);
break;
case CURLOPT_STDERR:
data->err = va_arg(param, FILE *);
break;
case CURLOPT_WRITEFUNCTION:
data->fwrite = va_arg(param, curl_write_callback);
break;
case CURLOPT_READFUNCTION:
data->fread = va_arg(param, curl_read_callback);
break;
case CURLOPT_SSLCERT:
data->cert = va_arg(param, char *);
break;
case CURLOPT_SSLCERTPASSWD:
data->cert_passwd = va_arg(param, char *);
break;
case CURLOPT_CRLF:
data->crlf = va_arg(param, long);
break;
case CURLOPT_QUOTE:
data->quote = va_arg(param, struct curl_slist *);
break;
case CURLOPT_INTERFACE:
data->device = va_arg(param, char *);
break;
case CURLOPT_KRB4LEVEL:
data->krb4_level = va_arg(param, char *);
data->bits.krb4=data->krb4_level?TRUE:FALSE;
break;
case CURLOPT_SSL_VERIFYPEER:
data->ssl.verifypeer = va_arg(param, long);
break;
case CURLOPT_CAINFO:
data->ssl.CAfile = va_arg(param, char *);
data->ssl.CApath = NULL; /*This does not work on windows.*/
break;
default:
/* unknown tag and its companion, just ignore: */
return CURLE_READ_ERROR; /* correct this */
}
return CURLE_OK;
}
#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
CURLcode curl_write(CURLconnect *c_conn, char *buf, size_t amount,
size_t *n)
{
struct connectdata *conn = (struct connectdata *)c_conn;
struct UrlData *data;
size_t bytes_written;
if(!n || !conn || (conn->handle != STRUCT_CONNECT))
return CURLE_FAILED_INIT;
data = conn->data;
#ifdef USE_SSLEAY
if (data->ssl.use) {
bytes_written = SSL_write(data->ssl.handle, buf, amount);
}
else {
#endif
#ifdef KRB4
if(conn->sec_complete)
bytes_written = sec_write(conn, conn->writesockfd, buf, amount);
else
#endif
bytes_written = swrite(conn->writesockfd, buf, amount);
#ifdef USE_SSLEAY
}
#endif /* USE_SSLEAY */
*n = bytes_written;
return CURLE_OK;
}
CURLcode curl_read(CURLconnect *c_conn, char *buf, size_t buffersize,
size_t *n)
{
struct connectdata *conn = (struct connectdata *)c_conn;
struct UrlData *data;
size_t nread;
if(!n || !conn || (conn->handle != STRUCT_CONNECT))
return CURLE_FAILED_INIT;
data = conn->data;
#ifdef USE_SSLEAY
if (data->ssl.use) {
nread = SSL_read (data->ssl.handle, buf, buffersize);
}
else {
#endif
#ifdef KRB4
if(conn->sec_complete)
nread = sec_read(conn, conn->sockfd, buf, buffersize);
else
#endif
nread = sread (conn->sockfd, buf, buffersize);
#ifdef USE_SSLEAY
}
#endif /* USE_SSLEAY */
*n = nread;
return CURLE_OK;
}
CURLcode curl_disconnect(CURLconnect *c_connect)
{
struct connectdata *conn = c_connect;
struct UrlData *data = conn->data;
if(conn->hostent_buf) /* host name info */
free(conn->hostent_buf);
if(conn->path) /* the URL path part */
free(conn->path);
free(conn); /* free the connection oriented data */
/* clean up the sockets and SSL stuff from the previous "round" */
urlfree(data, FALSE);
return CURLE_OK;
}
static CURLcode _connect(CURL *curl, CURLconnect **in_connect)
{
char *tmp;
char *buf;
CURLcode result;
char resumerange[40]="";
struct UrlData *data = curl;
struct connectdata *conn;
char endbracket;
#ifdef HAVE_SIGACTION
struct sigaction sigact;
#endif
int urllen;
/*************************************************************
* Check input data
*************************************************************/
if(!data || (data->handle != STRUCT_OPEN))
return CURLE_BAD_FUNCTION_ARGUMENT; /* TBD: make error codes */
if(!data->url)
return CURLE_URL_MALFORMAT;
/*************************************************************
* Allocate and initiate a connection struct
*************************************************************/
conn = (struct connectdata *)malloc(sizeof(struct connectdata));
if(!conn) {
*in_connect = NULL; /* clear the pointer */
return CURLE_OUT_OF_MEMORY;
}
*in_connect = conn;
memset(conn, 0, sizeof(struct connectdata));
conn->handle = STRUCT_CONNECT;
conn->data = data; /* remember our daddy */
conn->state = CONN_INIT;
conn->upload_bufsize = UPLOAD_BUFSIZE; /* the smallest upload buffer size
we use */
buf = data->buffer; /* this is our buffer */
/*************************************************************
* Set signal handler
*************************************************************/
#ifdef HAVE_SIGACTION
sigaction(SIGALRM, NULL, &sigact);
sigact.sa_handler = alarmfunc;
#ifdef SA_RESTART
/* HPUX doesn't have SA_RESTART but defaults to that behaviour! */
sigact.sa_flags &= ~SA_RESTART;
#endif
sigaction(SIGALRM, &sigact, NULL);
#else
/* no sigaction(), revert to the much lamer signal() */
#ifdef HAVE_SIGNAL
signal(SIGALRM, alarmfunc);
#endif
#endif
/***********************************************************
* We need to allocate memory to store the path in. We get the size of the
* full URL to be sure, and we need to make it at least 256 bytes since
* other parts of the code will rely on this fact
***********************************************************/
#define LEAST_PATH_ALLOC 256
urllen=strlen(data->url);
if(urllen < LEAST_PATH_ALLOC)
urllen=LEAST_PATH_ALLOC;
conn->path=(char *)malloc(urllen);
if(NULL == conn->path)
return CURLE_OUT_OF_MEMORY; /* really bad error */
/*************************************************************
* Parse the URL.
*
* We need to parse the url even when using the proxy, because we will need
* the hostname and port in case we are trying to SSL connect through the
* proxy -- and we don't know if we will need to use SSL until we parse the
* url ...
************************************************************/
if((2 == sscanf(data->url, "%64[^:]://%[^\n]",
conn->proto,
conn->path)) && strequal(conn->proto, "file")) {
/*
* we deal with file://<host>/<path> differently since it supports no
* hostname other than "localhost" and "127.0.0.1", which is unique among
* the URL protocols specified in RFC 1738
*/
if (strnequal(conn->path, "localhost/", 10) ||
strnequal(conn->path, "127.0.0.1/", 10))
/* If there's another host name than the one we support, <host>/ is
* quietly ommitted */
strcpy(conn->path, &conn->path[10]);
strcpy(conn->proto, "file"); /* store protocol string lowercase */
}
else {
/* Set default host and default path */
strcpy(conn->gname, "curl.haxx.se");
strcpy(conn->path, "/");
if (2 > sscanf(data->url,
"%64[^\n:]://%256[^\n/]%[^\n]",
conn->proto, conn->gname, conn->path)) {
/*
* The URL was badly formatted, let's try the browser-style _without_
* protocol specified like 'http://'.
*/
if((1 > sscanf(data->url, "%256[^\n/]%[^\n]",
conn->gname, conn->path)) ) {
/*
* We couldn't even get this format.
*/
failf(data, "<url> malformed");
return CURLE_URL_MALFORMAT;
}
/*
* Since there was no protocol part specified, we guess what protocol it
* is based on the first letters of the server name.
*/
if(strnequal(conn->gname, "FTP", 3)) {
strcpy(conn->proto, "ftp");
}
else if(strnequal(conn->gname, "GOPHER", 6))
strcpy(conn->proto, "gopher");
#ifdef USE_SSLEAY
else if(strnequal(conn->gname, "HTTPS", 5))
strcpy(conn->proto, "https");
#endif /* USE_SSLEAY */
else if(strnequal(conn->gname, "TELNET", 6))
strcpy(conn->proto, "telnet");
else if (strnequal(conn->gname, "DICT", sizeof("DICT")-1))
strcpy(conn->proto, "DICT");
else if (strnequal(conn->gname, "LDAP", sizeof("LDAP")-1))
strcpy(conn->proto, "LDAP");
else {
strcpy(conn->proto, "http");
}
conn->protocol |= PROT_MISSING; /* not given in URL */
}
}
/*************************************************************
* Take care of user and password authentication stuff
*************************************************************/
if(data->bits.user_passwd && !data->bits.use_netrc) {
data->user[0] =0;
data->passwd[0]=0;
if(*data->userpwd != ':') {
/* the name is given, get user+password */
sscanf(data->userpwd, "%127[^:]:%127[^\n]",
data->user, data->passwd);
}
else
/* no name given, get the password only */
sscanf(data->userpwd+1, "%127[^\n]", data->passwd);
/* check for password, if no ask for one */
if( !data->passwd[0] ) {
if(!data->fpasswd ||
data->fpasswd(data->passwd_client,
"password:", data->passwd, sizeof(data->passwd)))
return CURLE_BAD_PASSWORD_ENTERED;
}
}
/*************************************************************
* Take care of proxy authentication stuff
*************************************************************/
if(data->bits.proxy_user_passwd) {
data->proxyuser[0] =0;
data->proxypasswd[0]=0;
if(*data->proxyuserpwd != ':') {
/* the name is given, get user+password */
sscanf(data->proxyuserpwd, "%127[^:]:%127[^\n]",
data->proxyuser, data->proxypasswd);
}
else
/* no name given, get the password only */
sscanf(data->proxyuserpwd+1, "%127[^\n]", data->proxypasswd);
/* check for password, if no ask for one */
if( !data->proxypasswd[0] ) {
if(!data->fpasswd ||
data->fpasswd( data->passwd_client,
"proxy password:",
data->proxypasswd,
sizeof(data->proxypasswd)))
return CURLE_BAD_PASSWORD_ENTERED;
}
}
/*************************************************************
* Set a few convenience pointers
*************************************************************/
conn->name = conn->gname;
conn->ppath = conn->path;
data->hostname = conn->name;
/*************************************************************
* Detect what (if any) proxy to use
*************************************************************/
if(!data->bits.httpproxy) {
/* If proxy was not specified, we check for default proxy environment
* variables, to enable i.e Lynx compliance:
*
* http_proxy=http://some.server.dom:port/
* https_proxy=http://some.server.dom:port/
* ftp_proxy=http://some.server.dom:port/
* gopher_proxy=http://some.server.dom:port/
* no_proxy=domain1.dom,host.domain2.dom
* (a comma-separated list of hosts which should
* not be proxied, or an asterisk to override
* all proxy variables)
* all_proxy=http://some.server.dom:port/
* (seems to exist for the CERN www lib. Probably
* the first to check for.)
*
* For compatibility, the all-uppercase versions of these variables are
* checked if the lowercase versions don't exist.
*/
char *no_proxy=NULL;
char *proxy=NULL;
char proxy_env[128];
no_proxy=curl_getenv("no_proxy");
if(!no_proxy)
no_proxy=curl_getenv("NO_PROXY");
if(!no_proxy || !strequal("*", no_proxy)) {
/* NO_PROXY wasn't specified or it wasn't just an asterisk */
char *nope;
nope=no_proxy?strtok(no_proxy, ", "):NULL;
while(nope) {
if(strlen(nope) <= strlen(conn->name)) {
char *checkn=
conn->name + strlen(conn->name) - strlen(nope);
if(strnequal(nope, checkn, strlen(nope))) {
/* no proxy for this host! */
break;
}
}
nope=strtok(NULL, ", ");
}
if(!nope) {
/* It was not listed as without proxy */
char *protop = conn->proto;
char *envp = proxy_env;
char *prox;
/* Now, build <protocol>_proxy and check for such a one to use */
while(*protop)
*envp++ = tolower(*protop++);
/* append _proxy */
strcpy(envp, "_proxy");
/* read the protocol proxy: */
prox=curl_getenv(proxy_env);
if(!prox) {
/* There was no lowercase variable, try the uppercase version: */
for(envp = proxy_env; *envp; envp++)
*envp = toupper(*envp);
prox=curl_getenv(proxy_env);
}
if(prox && *prox) { /* don't count "" strings */
proxy = prox; /* use this */
}
else {
proxy = curl_getenv("all_proxy"); /* default proxy to use */
if(!proxy)
proxy=curl_getenv("ALL_PROXY");
}
if(proxy && *proxy) {
/* we have a proxy here to set */
data->proxy = proxy;
data->bits.proxystringalloc=1; /* this needs to be freed later */
data->bits.httpproxy=1;
}
} /* if (!nope) - it wasn't specified non-proxy */
} /* NO_PROXY wasn't specified or '*' */
if(no_proxy)
free(no_proxy);
} /* if not using proxy */
/*************************************************************
* No protocol but proxy usage needs attention
*************************************************************/
if((conn->protocol&PROT_MISSING) && data->bits.httpproxy ) {
/* We're guessing prefixes here and since we're told to use a proxy, we
need to add the protocol prefix to the URL string before we continue!
*/
char *reurl;
reurl = aprintf("%s://%s", conn->proto, data->url);
if(!reurl)
return CURLE_OUT_OF_MEMORY;
data->url = reurl;
if(data->freethis)
free(data->freethis);
data->freethis = reurl;
conn->protocol &= ~PROT_MISSING; /* switch that one off again */
}
/************************************************************
* RESUME on a HTTP page is a tricky business. First, let's just check that
* 'range' isn't used, then set the range parameter and leave the resume as
* it is to inform about this situation for later use. We will then
* "attempt" to resume, and if we're talking to a HTTP/1.1 (or later)
* server, we will get the document resumed. If we talk to a HTTP/1.0
* server, we just fail since we can't rewind the file writing from within
* this function.
***********************************************************/
if(data->resume_from) {
if(!data->bits.set_range) {
/* if it already was in use, we just skip this */
snprintf(resumerange, sizeof(resumerange), "%d-", data->resume_from);
data->range=strdup(resumerange); /* tell ourselves to fetch this range */
data->bits.rangestringalloc = TRUE; /* mark as allocated */
data->bits.set_range = 1; /* switch on range usage */
}
}
/*************************************************************
* Set timeout if that is being used
*************************************************************/
if(data->timeout) {
/* We set the timeout on the connection/resolving phase first, separately
* from the download/upload part to allow a maximum time on everything */
myalarm(data->timeout); /* this sends a signal when the timeout fires
off, and that will abort system calls */
}
/*************************************************************
* Setup internals depending on protocol
*************************************************************/
if (strequal(conn->proto, "HTTP")) {
if(!data->port)
data->port = PORT_HTTP;
data->remote_port = PORT_HTTP;
conn->protocol |= PROT_HTTP;
conn->curl_do = Curl_http;
conn->curl_done = Curl_http_done;
conn->curl_close = Curl_http_close;
}
else if (strequal(conn->proto, "HTTPS")) {
#ifdef USE_SSLEAY
if(!data->port)
data->port = PORT_HTTPS;
data->remote_port = PORT_HTTPS;
conn->protocol |= PROT_HTTP;
conn->protocol |= PROT_HTTPS;
conn->curl_do = Curl_http;
conn->curl_done = Curl_http_done;
conn->curl_connect = Curl_http_connect;
conn->curl_close = Curl_http_close;
#else /* USE_SSLEAY */
failf(data, "libcurl was built with SSL disabled, https: not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif /* !USE_SSLEAY */
}
else if (strequal(conn->proto, "GOPHER")) {
if(!data->port)
data->port = PORT_GOPHER;
data->remote_port = PORT_GOPHER;
/* Skip /<item-type>/ in path if present */
if (isdigit((int)conn->path[1])) {
conn->ppath = strchr(&conn->path[1], '/');
if (conn->ppath == NULL)
conn->ppath = conn->path;
}
conn->protocol |= PROT_GOPHER;
conn->curl_do = Curl_http;
conn->curl_done = Curl_http_done;
conn->curl_close = Curl_http_close;
}
else if(strequal(conn->proto, "FTP")) {
char *type;
if(!data->port)
data->port = PORT_FTP;
data->remote_port = PORT_FTP;
conn->protocol |= PROT_FTP;
if(data->bits.httpproxy &&
!data->bits.tunnel_thru_httpproxy) {
/* Unless we have asked to tunnel ftp operations through the proxy, we
switch and use HTTP operations only */
conn->curl_do = Curl_http;
conn->curl_done = Curl_http_done;
conn->curl_close = Curl_http_close;
}
else {
conn->curl_do = Curl_ftp;
conn->curl_done = Curl_ftp_done;
conn->curl_connect = Curl_ftp_connect;
}
conn->ppath++; /* don't include the initial slash */
/* FTP URLs support an extension like ";type=<typecode>" that
* we'll try to get now! */
type=strstr(conn->ppath, ";type=");
if(!type) {
type=strstr(conn->gname, ";type=");
}
if(type) {
char command;
*type=0;
command = toupper(type[6]);
switch(command) {
case 'A': /* ASCII mode */
data->bits.ftp_ascii = 1;
break;
case 'D': /* directory mode */
data->bits.ftp_list_only = 1;
break;
case 'I': /* binary mode */
default:
/* switch off ASCII */
data->bits.ftp_ascii = 0;
break;
}
}
}
else if(strequal(conn->proto, "TELNET")) {
/* telnet testing factory */
conn->protocol |= PROT_TELNET;
if(!data->port)
data->port = PORT_TELNET;
data->remote_port = PORT_TELNET;
conn->curl_do = Curl_telnet;
conn->curl_done = Curl_telnet_done;
}
else if (strequal(conn->proto, "DICT")) {
conn->protocol |= PROT_DICT;
if(!data->port)
data->port = PORT_DICT;
data->remote_port = PORT_DICT;
conn->curl_do = Curl_dict;
conn->curl_done = Curl_dict_done;
}
else if (strequal(conn->proto, "LDAP")) {
conn->protocol |= PROT_LDAP;
if(!data->port)
data->port = PORT_LDAP;
data->remote_port = PORT_LDAP;
conn->curl_do = Curl_ldap;
conn->curl_done = Curl_ldap_done;
}
else if (strequal(conn->proto, "FILE")) {
conn->protocol |= PROT_FILE;
conn->curl_do = file;
/* no done() function */
result = Curl_Transfer(conn, -1, -1, FALSE, NULL, /* no download */
-1, NULL); /* no upload */
return CURLE_OK;
}
else {
/* We fell through all checks and thus we don't support the specified
protocol */
failf(data, "Unsupported protocol: %s", conn->proto);
return CURLE_UNSUPPORTED_PROTOCOL;
}
/*************************************************************
* .netrc scanning coming up
*************************************************************/
if(data->bits.use_netrc) {
if(Curl_parsenetrc(data->hostname, data->user, data->passwd)) {
infof(data, "Couldn't find host %s in the .netrc file, using defaults",
data->hostname);
}
/* weather we failed or not, we don't know which fields that were filled
in anyway */
if(!data->user[0])
strcpy(data->user, CURL_DEFAULT_USER);
if(!data->passwd[0])
strcpy(data->passwd, CURL_DEFAULT_PASSWORD);
if(conn->protocol&PROT_HTTP) {
data->bits.user_passwd = 1; /* enable user+password */
}
}
else if(!(data->bits.user_passwd) &&
(conn->protocol & (PROT_FTP|PROT_HTTP)) ) {
/* This is a FTP or HTTP URL, and we haven't got the user+password in
* the extra parameter, we will now try to extract the possible
* user+password pair in a string like:
* ftp://user:password@ftp.my.site:8021/README */
char *ptr=NULL; /* assign to remove possible warnings */
if((ptr=strchr(conn->name, '@'))) {
/* there's a user+password given here, to the left of the @ */
data->user[0] =0;
data->passwd[0]=0;
if(*conn->name != ':') {
/* the name is given, get user+password */
sscanf(conn->name, "%127[^:@]:%127[^@]",
data->user, data->passwd);
}
else
/* no name given, get the password only */
sscanf(conn->name+1, "%127[^@]", data->passwd);
if(data->user[0]) {
char *newname=curl_unescape(data->user, 0);
if(strlen(newname) < sizeof(data->user)) {
strcpy(data->user, newname);
}
/* if the new name is longer than accepted, then just use
the unconverted name, it'll be wrong but what the heck */
free(newname);
}
/* check for password, if no ask for one */
if( !data->passwd[0] ) {
if(!data->fpasswd ||
data->fpasswd(data->passwd_client,
"password:",data->passwd,sizeof(data->passwd)))
return CURLE_BAD_PASSWORD_ENTERED;
}
else {
/* we have a password found in the URL, decode it! */
char *newpasswd=curl_unescape(data->passwd, 0);
if(strlen(newpasswd) < sizeof(data->passwd)) {
strcpy(data->passwd, newpasswd);
}
free(newpasswd);
}
conn->name = ++ptr;
data->bits.user_passwd=1; /* enable user+password */
}
else {
strcpy(data->user, CURL_DEFAULT_USER);
strcpy(data->passwd, CURL_DEFAULT_PASSWORD);
}
}
/*************************************************************
* Figure out the remote port number
*
* No matter if we use a proxy or not, we have to figure out the remote
* port number of various reasons.
*
* To be able to detect port number flawlessly, we must not confuse them
* IPv6-specified addresses in the [0::1] style.
*************************************************************/
if((1 == sscanf(conn->name, "[%*39[0-9a-fA-F:]%c", &endbracket)) &&
(']' == endbracket)) {
/* this is a IPv6-style specified IP-address */
#ifndef ENABLE_IPV6
failf(data, "You haven't enabled IPv6 support");
return CURLE_URL_MALFORMAT;
#else
tmp = strchr(conn->name, ']');
tmp++; /* pass the ending bracket */
if(':' != *tmp)
tmp = NULL; /* no port number available */
#endif
}
else {
/* traditional IPv4-style port-extracting */
tmp = strchr(conn->name, ':');
}
if (tmp) {
*tmp++ = '\0'; /* cut off the name there */
data->remote_port = atoi(tmp);
}
/*************************************************************
* Resolve the name of the server or proxy
*************************************************************/
if(!data->bits.httpproxy) {
/* If not connecting via a proxy, extract the port from the URL, if it is
* there, thus overriding any defaults that might have been set above. */
data->port = data->remote_port; /* it is the same port */
/* Connect to target host right on */
conn->hp = Curl_gethost(data, conn->name, &conn->hostent_buf);
if(!conn->hp) {
failf(data, "Couldn't resolve host '%s'", conn->name);
return CURLE_COULDNT_RESOLVE_HOST;
}
}
else {
char *prox_portno;
char *endofprot;
/* We need to make a duplicate of the proxy so that we can modify the
string safely. */
char *proxydup=strdup(data->proxy);
/* We use 'proxyptr' to point to the proxy name from now on... */
char *proxyptr=proxydup;
if(NULL == proxydup) {
failf(data, "memory shortage");
return CURLE_OUT_OF_MEMORY;
}
/* Daniel Dec 10, 1998:
We do the proxy host string parsing here. We want the host name and the
port name. Accept a protocol:// prefix, even though it should just be
ignored. */
/* 1. skip the protocol part if present */
endofprot=strstr(proxyptr, "://");
if(endofprot) {
proxyptr = endofprot+3;
}
/* allow user to specify proxy.server.com:1080 if desired */
prox_portno = strchr (proxyptr, ':');
if (prox_portno) {
*prox_portno = 0x0; /* cut off number from host name */
prox_portno ++;
/* now set the local port number */
data->port = atoi(prox_portno);
}
else if(data->proxyport) {
/* None given in the proxy string, then get the default one if it is
given */
data->port = data->proxyport;
}
/* connect to proxy */
conn->hp = Curl_gethost(data, proxyptr, &conn->hostent_buf);
if(!conn->hp) {
failf(data, "Couldn't resolve proxy '%s'", proxyptr);
return CURLE_COULDNT_RESOLVE_PROXY;
}
free(proxydup); /* free the duplicate pointer and not the modified */
}
Curl_pgrsTime(data, TIMER_NAMELOOKUP);
data->firstsocket = socket(AF_INET, SOCK_STREAM, 0);
memset((char *) &conn->serv_addr, '\0', sizeof(conn->serv_addr));
memcpy((char *)&(conn->serv_addr.sin_addr),
conn->hp->h_addr, conn->hp->h_length);
conn->serv_addr.sin_family = conn->hp->h_addrtype;
conn->serv_addr.sin_port = htons(data->port);
#if !defined(WIN32)||defined(__CYGWIN32__)
/* We don't generally like checking for OS-versions, we should make this
HAVE_XXXX based, although at the moment I don't have a decent test for
this! */
#ifdef HAVE_INET_NTOA
#ifndef INADDR_NONE
#define INADDR_NONE (unsigned long) ~0
#endif
/*************************************************************
* Select device to bind socket to
*************************************************************/
if (data->device && (strlen(data->device)<255)) {
struct sockaddr_in sa;
struct hostent *h=NULL;
char *hostdataptr=NULL;
size_t size;
char myhost[256] = "";
unsigned long in;
if(Curl_if2ip(data->device, myhost, sizeof(myhost))) {
h = Curl_gethost(data, myhost, &hostdataptr);
}
else {
if(strlen(data->device)>1) {
h = Curl_gethost(data, data->device, &hostdataptr);
}
if(h) {
/* we know data->device is shorter than the myhost array */
strcpy(myhost, data->device);
}
}
if(! *myhost) {
/* need to fix this
h=Curl_gethost(data,
getmyhost(*myhost,sizeof(myhost)),
hostent_buf,
sizeof(hostent_buf));
*/
printf("in here\n");
}
infof(data, "We connect from %s\n", myhost);
if ( (in=inet_addr(myhost)) != INADDR_NONE ) {
if ( h ) {
memset((char *)&sa, 0, sizeof(sa));
memcpy((char *)&sa.sin_addr,
h->h_addr,
h->h_length);
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = in;
sa.sin_port = 0; /* get any port */
if( bind(data->firstsocket, (struct sockaddr *)&sa, sizeof(sa)) >= 0) {
/* we succeeded to bind */
struct sockaddr_in add;
size = sizeof(add);
if(getsockname(data->firstsocket, (struct sockaddr *) &add,
(int *)&size)<0) {
failf(data, "getsockname() failed");
return CURLE_HTTP_PORT_FAILED;
}
}
else {
switch(errno) {
case EBADF:
failf(data, "Invalid descriptor: %d", errno);
break;
case EINVAL:
failf(data, "Invalid request: %d", errno);
break;
case EACCES:
failf(data, "Address is protected, user not superuser: %d", errno);
break;
case ENOTSOCK:
failf(data,
"Argument is a descriptor for a file, not a socket: %d",
errno);
break;
case EFAULT:
failf(data, "Inaccessable memory error: %d", errno);
break;
case ENAMETOOLONG:
failf(data, "Address too long: %d", errno);
break;
case ENOMEM:
failf(data, "Insufficient kernel memory was available: %d", errno);
break;
default:
failf(data,"errno %d\n");
} /* end of switch */
return CURLE_HTTP_PORT_FAILED;
} /* end of else */
} /* end of if h */
else {
failf(data,"could't find my own IP address (%s)", myhost);
return CURLE_HTTP_PORT_FAILED;
}
} /* end of inet_addr */
else {
failf(data, "could't find my own IP address (%s)", myhost);
return CURLE_HTTP_PORT_FAILED;
}
if(hostdataptr)
free(hostdataptr); /* allocated by Curl_gethost() */
} /* end of device selection support */
#endif /* end of HAVE_INET_NTOA */
#endif /* end of not WIN32 */
/*************************************************************
* Connect to server/proxy
*************************************************************/
if (connect(data->firstsocket,
(struct sockaddr *) &(conn->serv_addr),
sizeof(conn->serv_addr)
) < 0) {
switch(errno) {
#ifdef ECONNREFUSED
/* this should be made nicer */
case ECONNREFUSED:
failf(data, "Connection refused");
break;
case EFAULT:
failf(data, "Invalid socket address: %d",errno);
break;
case EISCONN:
failf(data, "Socket already connected: %d",errno);
break;
case ETIMEDOUT:
failf(data, "Timeout while accepting connection, server busy: %d",errno);
break;
case ENETUNREACH:
failf(data, "Network is unreachable: %d",errno);
break;
case EADDRINUSE:
failf(data, "Local address already in use: %d",errno);
break;
case EINPROGRESS:
failf(data, "Socket is nonblocking and connection can not be completed immediately: %d",errno);
break;
case EALREADY:
failf(data, "Socket is nonblocking and a previous connection attempt not completed: %d",errno);
break;
case EAGAIN:
failf(data, "No more free local ports: %d",errno);
break;
case EACCES:
case EPERM:
failf(data, "Attempt to connect to broadcast address without socket broadcast flag or local firewall rule violated: %d",errno);
break;
#endif
case EINTR:
failf(data, "Connection timeouted");
break;
default:
failf(data, "Can't connect to server: %d", errno);
break;
}
return CURLE_COULDNT_CONNECT;
}
/*************************************************************
* Proxy authentication
*************************************************************/
if(data->bits.proxy_user_passwd) {
char *authorization;
snprintf(data->buffer, BUFSIZE, "%s:%s",
data->proxyuser, data->proxypasswd);
if(Curl_base64_encode(data->buffer, strlen(data->buffer),
&authorization) >= 0) {
data->ptr_proxyuserpwd =
aprintf("Proxy-authorization: Basic %s\015\012", authorization);
free(authorization);
}
}
/*************************************************************
* Send user-agent to HTTP proxies even if the target protocol
* isn't HTTP.
*************************************************************/
if((conn->protocol&PROT_HTTP) || data->bits.httpproxy) {
if(data->useragent) {
data->ptr_uagent =
aprintf("User-Agent: %s\015\012", data->useragent);
}
}
if(conn->curl_connect) {
/* is there a connect() procedure? */
/* set start time here for timeout purposes in the
* connect procedure, it is later set again for the
* progress meter purpose */
conn->now = Curl_tvnow();
/* Call the protocol-specific connect function */
result = conn->curl_connect(conn);
if(result != CURLE_OK)
return result; /* pass back errors */
}
Curl_pgrsTime(data, TIMER_CONNECT); /* we're connected */
conn->now = Curl_tvnow(); /* time this *after* the connect is done */
conn->bytecount = 0;
/* Figure out the ip-number and display the first host name it shows: */
{
struct in_addr in;
(void) memcpy(&in.s_addr, *conn->hp->h_addr_list, sizeof (in.s_addr));
infof(data, "Connected to %s (%s)\n", conn->hp->h_name, inet_ntoa(in));
}
#ifdef __EMX__
/* 20000330 mgs
* the check is quite a hack...
* we're calling _fsetmode to fix the problem with fwrite converting newline
* characters (you get mangled text files, and corrupted binary files when
* you download to stdout and redirect it to a file). */
if ((data->out)->_handle == NULL) {
_fsetmode(stdout, "b");
}
#endif
return CURLE_OK;
}
CURLcode curl_connect(CURL *curl, CURLconnect **in_connect)
{
CURLcode code;
struct connectdata *conn;
/* call the stuff that needs to be called */
code = _connect(curl, in_connect);
if(CURLE_OK != code) {
/* We're not allowed to return failure with memory left allocated
in the connectdata struct, free those here */
conn = (struct connectdata *)*in_connect;
if(conn) {
if(conn->path)
free(conn->path);
if(conn->hostent_buf)
free(conn->hostent_buf);
free(conn);
*in_connect=NULL;
}
}
return code;
}
/*
* NAME curl_connect()
*
* DESCRIPTION
*
* Connects to the peer server and performs the initial setup. This function
* writes a connect handle to its second argument that is a unique handle for
* this connect. This allows multiple connects from the same handle returned
* by curl_open().
*
* EXAMPLE
*
* CURLCode result;
* CURL curl;
* CURLconnect connect;
* result = curl_connect(curl, &connect);
*/
CURLcode curl_done(CURLconnect *c_connect)
{
struct connectdata *conn = c_connect;
struct UrlData *data;
CURLcode result;
if(!conn || (conn->handle!= STRUCT_CONNECT)) {
return CURLE_BAD_FUNCTION_ARGUMENT;
}
if(conn->state != CONN_DO) {
/* This can only be called after a curl_do() */
return CURLE_BAD_CALLING_ORDER;
}
data = conn->data;
/* this calls the protocol-specific function pointer previously set */
if(conn->curl_done)
result = conn->curl_done(conn);
else
result = CURLE_OK;
Curl_pgrsDone(data); /* done with the operation */
conn->state = CONN_DONE;
return result;
}
CURLcode curl_do(CURLconnect *in_conn)
{
struct connectdata *conn = in_conn;
CURLcode result;
if(!conn || (conn->handle!= STRUCT_CONNECT)) {
return CURLE_BAD_FUNCTION_ARGUMENT;
}
if(conn->state != CONN_INIT) {
return CURLE_BAD_CALLING_ORDER;
}
if(conn->curl_do) {
/* generic protocol-specific function pointer set in curl_connect() */
result = conn->curl_do(conn);
if(result) {
conn->state = CONN_ERROR;
return result;
}
}
conn->state = CONN_DO; /* we have entered this state */
return CURLE_OK;
}
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