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http-proxy: only attempt FTP over HTTP proxy

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... 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
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77
lib/imap.c
View file

@ -160,58 +160,6 @@ const struct Curl_handler Curl_handler_imaps = {
};
#endif
#ifndef CURL_DISABLE_HTTP
/*
* HTTP-proxyed IMAP protocol handler.
*/
static const struct Curl_handler Curl_handler_imap_proxy = {
"IMAP", /* 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_IMAP, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#ifdef USE_SSL
/*
* HTTP-proxyed IMAPS protocol handler.
*/
static const struct Curl_handler Curl_handler_imaps_proxy = {
"IMAPS", /* 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_IMAPS, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#endif
#endif
/* SASL parameters for the imap protocol */
static const struct SASLproto saslimap = {
"imap", /* The service name */
@ -1715,31 +1663,6 @@ static CURLcode imap_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 IMAP operations through the proxy, we
switch and use HTTP operations only */
#ifndef CURL_DISABLE_HTTP
if(conn->handler == &Curl_handler_imap)
conn->handler = &Curl_handler_imap_proxy;
else {
#ifdef USE_SSL
conn->handler = &Curl_handler_imaps_proxy;
#else
failf(data, "IMAPS not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
/* set it up as an HTTP connection instead */
return conn->handler->setup_connection(conn);
#else
failf(data, "IMAP over http proxy requires HTTP support built-in!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
data->state.path++; /* don't include the initial slash */
return CURLE_OK;