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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
lib/ftp.c
View File

@ -180,8 +180,8 @@ const struct Curl_handler Curl_handler_ftp = {
ZERO_NULL, /* readwrite */
PORT_FTP, /* defport */
CURLPROTO_FTP, /* protocol */
PROTOPT_DUAL | PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD
| PROTOPT_NOURLQUERY /* flags */
PROTOPT_DUAL | PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD |
PROTOPT_NOURLQUERY | PROTOPT_PROXY_AS_HTTP /* flags */
};
@ -212,59 +212,6 @@ const struct Curl_handler Curl_handler_ftps = {
};
#endif
#ifndef CURL_DISABLE_HTTP
/*
* HTTP-proxyed FTP protocol handler.
*/
static const struct Curl_handler Curl_handler_ftp_proxy = {
"FTP", /* 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_FTP, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#ifdef USE_SSL
/*
* HTTP-proxyed FTPS protocol handler.
*/
static const struct Curl_handler Curl_handler_ftps_proxy = {
"FTPS", /* 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_FTPS, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#endif
#endif
static void close_secondarysocket(struct connectdata *conn)
{
if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET]) {
@ -4462,28 +4409,6 @@ static CURLcode ftp_setup_connection(struct connectdata *conn)
char command;
struct FTP *ftp;
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
/* Unless we have asked to tunnel ftp operations through the proxy, we
switch and use HTTP operations only */
#ifndef CURL_DISABLE_HTTP
if(conn->handler == &Curl_handler_ftp)
conn->handler = &Curl_handler_ftp_proxy;
else {
#ifdef USE_SSL
conn->handler = &Curl_handler_ftps_proxy;
#else
failf(data, "FTPS not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
/* set it up as a HTTP connection instead */
return conn->handler->setup_connection(conn);
#else
failf(data, "FTP over http proxy requires HTTP support built-in!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
conn->data->req.protop = ftp = malloc(sizeof(struct FTP));
if(NULL == ftp)
return CURLE_OUT_OF_MEMORY;

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;

77
lib/pop3.c
View File

@ -158,58 +158,6 @@ const struct Curl_handler Curl_handler_pop3s = {
};
#endif
#ifndef CURL_DISABLE_HTTP
/*
* HTTP-proxyed POP3 protocol handler.
*/
static const struct Curl_handler Curl_handler_pop3_proxy = {
"POP3", /* 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_POP3, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#ifdef USE_SSL
/*
* HTTP-proxyed POP3S protocol handler.
*/
static const struct Curl_handler Curl_handler_pop3s_proxy = {
"POP3S", /* 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_POP3S, /* defport */
CURLPROTO_HTTP, /* protocol */
PROTOPT_NONE /* flags */
};
#endif
#endif
/* SASL parameters for the pop3 protocol */
static const struct SASLproto saslpop3 = {
"pop", /* The service name */
@ -1355,31 +1303,6 @@ static CURLcode pop3_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 POP3 operations through the proxy, we
switch and use HTTP operations only */
#ifndef CURL_DISABLE_HTTP
if(conn->handler == &Curl_handler_pop3)
conn->handler = &Curl_handler_pop3_proxy;
else {
#ifdef USE_SSL
conn->handler = &Curl_handler_pop3s_proxy;
#else
failf(data, "POP3S not supported!");
return CURLE_UNSUPPORTED_PROTOCOL;
#endif
}
/* set it up as an HTTP connection instead */
return conn->handler->setup_connection(conn);
#else
failf(data, "POP3 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;

76
lib/smtp.c
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)

15
lib/url.c
View File

@ -5348,12 +5348,15 @@ static CURLcode create_conn_helper_init_proxy(struct connectdata *conn)
result = CURLE_UNSUPPORTED_PROTOCOL;
goto out;
#else
/* force this connection's protocol to become HTTP if not already
compatible - if it isn't tunneling through */
if(!(conn->handler->protocol & PROTO_FAMILY_HTTP) &&
!conn->bits.tunnel_proxy)
conn->handler = &Curl_handler_http;
/* force this connection's protocol to become HTTP if compatible */
if(!(conn->handler->protocol & PROTO_FAMILY_HTTP)) {
if((conn->handler->flags & PROTOPT_PROXY_AS_HTTP) &&
!conn->bits.tunnel_proxy)
conn->handler = &Curl_handler_http;
else
/* if not converting to HTTP over the proxy, enforce tunneling */
conn->bits.tunnel_proxy = TRUE;
}
conn->bits.httpproxy = TRUE;
#endif
}

3
lib/urldata.h
View File

@ -855,6 +855,9 @@ struct Curl_handler {
#define PROTOPT_STREAM (1<<9) /* a protocol with individual logical streams */
#define PROTOPT_URLOPTIONS (1<<10) /* allow options part in the userinfo field
of the URL */
#define PROTOPT_PROXY_AS_HTTP (1<<11) /* allow this non-HTTP scheme over a
HTTP proxy as HTTP proxies may know
this protocol and act as a gateway */
/* return the count of bytes sent, or -1 on error */
typedef ssize_t (Curl_send)(struct connectdata *conn, /* connection data */