http-proxy: only attempt FTP over HTTP proxy

... all other non-HTTP protocol schemes are now defaulting to "tunnel
trough" mode if a HTTP proxy is specified. In reality there are no HTTP
proxies out there that allow those other schemes.

Assisted-by: Ray Satiro, Michael Kaufmann

Closes #1505
This commit is contained in:
Daniel Stenberg 2017-06-15 13:45:57 +02:00
parent 4d1147ae20
commit efc83d6d54
6 changed files with 14 additions and 313 deletions

View file

@ -157,58 +157,6 @@ const struct Curl_handler Curl_handler_smtps = {
};
#endif
#ifndef CURL_DISABLE_HTTP
/*
* HTTP-proxyed SMTP protocol handler.
*/
static const struct Curl_handler Curl_handler_smtp_proxy = {
"SMTP", /* scheme */
Curl_http_setup_conn, /* setup_connection */
Curl_http, /* do_it */
Curl_http_done, /* done */
ZERO_NULL, /* do_more */
ZERO_NULL, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
ZERO_NULL, /* readwrite */
PORT_SMTP, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#ifdef USE_SSL
/*
* HTTP-proxyed SMTPS protocol handler.
*/
static const struct Curl_handler Curl_handler_smtps_proxy = {
"SMTPS", /* scheme */
Curl_http_setup_conn, /* setup_connection */
Curl_http, /* do_it */
Curl_http_done, /* done */
ZERO_NULL, /* do_more */
ZERO_NULL, /* connect_it */
ZERO_NULL, /* connecting */
ZERO_NULL, /* doing */
ZERO_NULL, /* proto_getsock */
ZERO_NULL, /* doing_getsock */
ZERO_NULL, /* domore_getsock */
ZERO_NULL, /* perform_getsock */
ZERO_NULL, /* disconnect */
ZERO_NULL, /* readwrite */
PORT_SMTPS, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#endif
#endif
/* SASL parameters for the smtp protocol */
static const struct SASLproto saslsmtp = {
"smtp", /* The service name */
@ -1451,30 +1399,6 @@ static CURLcode smtp_setup_connection(struct connectdata *conn)
/* Clear the TLS upgraded flag */
conn->tls_upgraded = FALSE;
/* Set up the proxy if necessary */
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
/* Unless we have asked to tunnel SMTP operations through the proxy, we
switch and use HTTP operations only */
#ifndef CURL_DISABLE_HTTP
if(conn->handler == &Curl_handler_smtp)
conn->handler = &Curl_handler_smtp_proxy;
else {
#ifdef USE_SSL
conn->handler = &Curl_handler_smtps_proxy;
#else
failf(data, "SMTPS not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
/* set it up as a HTTP connection instead */
return conn->handler->setup_connection(conn);
#else
failf(data, "SMTP over http proxy requires HTTP support built-in!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
/* Initialise the SMTP layer */
result = smtp_init(conn);
if(result)