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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file
*/
#include "lib.h"
#include "buffer.h"
#include "str.h"
#include "iostream-pump.h"
#include "iostream-proxy.h"
#include <unistd.h>
#undef iostream_proxy_set_completion_callback
struct iostream_proxy {
struct iostream_pump *ltr;
struct iostream_pump *rtl;
unsigned int ref;
iostream_proxy_callback_t *callback;
void *context;
};
static void
iostream_proxy_completion(struct iostream_proxy *proxy,
enum iostream_proxy_side side,
enum iostream_pump_status pump_status)
{
enum iostream_proxy_status status;
switch (pump_status) {
case IOSTREAM_PUMP_STATUS_INPUT_EOF:
status = IOSTREAM_PROXY_STATUS_INPUT_EOF;
break;
case IOSTREAM_PUMP_STATUS_INPUT_ERROR:
status = IOSTREAM_PROXY_STATUS_INPUT_ERROR;
break;
case IOSTREAM_PUMP_STATUS_OUTPUT_ERROR:
status = IOSTREAM_PROXY_STATUS_OTHER_SIDE_OUTPUT_ERROR;
break;
default:
i_unreached();
}
proxy->callback(side, status, proxy->context);
}
static
void iostream_proxy_rtl_completion(enum iostream_pump_status status,
struct iostream_proxy *proxy)
{
iostream_proxy_completion(proxy, IOSTREAM_PROXY_SIDE_RIGHT, status);
}
static
void iostream_proxy_ltr_completion(enum iostream_pump_status status,
struct iostream_proxy *proxy)
{
iostream_proxy_completion(proxy, IOSTREAM_PROXY_SIDE_LEFT, status);
}
struct iostream_proxy *
iostream_proxy_create(struct istream *left_input, struct ostream *left_output,
struct istream *right_input, struct ostream *right_output)
{
i_assert(left_input != NULL &&
right_input != NULL &&
left_output != NULL &&
right_output != NULL);
/* create proxy */
struct iostream_proxy *proxy = i_new(struct iostream_proxy, 1);
proxy->ltr = iostream_pump_create(left_input, right_output);
proxy->rtl = iostream_pump_create(right_input, left_output);
iostream_pump_set_completion_callback(proxy->ltr, iostream_proxy_ltr_completion, proxy);
iostream_pump_set_completion_callback(proxy->rtl, iostream_proxy_rtl_completion, proxy);
proxy->ref = 1;
return proxy;
}
void iostream_proxy_start(struct iostream_proxy *proxy)
{
i_assert(proxy != NULL);
i_assert(proxy->callback != NULL);
iostream_pump_start(proxy->rtl);
iostream_pump_start(proxy->ltr);
}
void iostream_proxy_set_completion_callback(struct iostream_proxy *proxy,
iostream_proxy_callback_t *callback,
void *context)
{
i_assert(proxy != NULL);
proxy->callback = callback;
proxy->context = context;
}
struct istream *iostream_proxy_get_istream(struct iostream_proxy *proxy, enum iostream_proxy_side side)
{
i_assert(proxy != NULL);
switch(side) {
case IOSTREAM_PROXY_SIDE_LEFT: return iostream_pump_get_input(proxy->ltr);
case IOSTREAM_PROXY_SIDE_RIGHT: return iostream_pump_get_input(proxy->rtl);
default: i_unreached();
}
}
struct ostream *iostream_proxy_get_ostream(struct iostream_proxy *proxy, enum iostream_proxy_side side)
{
i_assert(proxy != NULL);
switch(side) {
case IOSTREAM_PROXY_SIDE_LEFT: return iostream_pump_get_output(proxy->ltr);
case IOSTREAM_PROXY_SIDE_RIGHT: return iostream_pump_get_output(proxy->rtl);
default: i_unreached();
}
}
void iostream_proxy_ref(struct iostream_proxy *proxy)
{
i_assert(proxy != NULL && proxy->ref > 0);
proxy->ref++;
}
void iostream_proxy_unref(struct iostream_proxy **proxy_r)
{
struct iostream_proxy *proxy;
if (proxy_r == NULL || *proxy_r == NULL)
return;
proxy = *proxy_r;
*proxy_r = NULL;
i_assert(proxy->ref > 0);
if (--proxy->ref == 0) {
/* pumps will call stop internally
if refcount drops to 0 */
iostream_pump_unref(&proxy->ltr);
iostream_pump_unref(&proxy->rtl);
i_free(proxy);
}
}
void iostream_proxy_stop(struct iostream_proxy *proxy)
{
i_assert(proxy != NULL);
iostream_pump_stop(proxy->ltr);
iostream_pump_stop(proxy->rtl);
}
bool iostream_proxy_is_waiting_output(struct iostream_proxy *proxy,
enum iostream_proxy_side side)
{
switch (side) {
case IOSTREAM_PROXY_SIDE_LEFT:
return iostream_pump_is_waiting_output(proxy->ltr);
case IOSTREAM_PROXY_SIDE_RIGHT:
return iostream_pump_is_waiting_output(proxy->rtl);
}
i_unreached();
}
void iostream_proxy_switch_ioloop(struct iostream_proxy *proxy)
{
i_assert(proxy != NULL);
iostream_pump_switch_ioloop(proxy->ltr);
iostream_pump_switch_ioloop(proxy->rtl);
}
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