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/* Copyright (c) 2010-2018 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "ioloop.h"
#include "istream.h"
#include "ostream.h"
#include "net.h"
#include "llist.h"
#include "safe-memset.h"
#include "auth-client-interface.h"
#include "director.h"
#include "auth-connection.h"
#include <unistd.h>
struct auth_connection {
struct auth_connection *prev, *next;
struct director *dir;
char *path;
int fd;
struct io *io;
struct istream *input;
struct ostream *output;
auth_input_callback *callback;
void *context;
};
static struct auth_connection *auth_connections;
static void auth_connection_disconnected(struct auth_connection **conn);
static void auth_connection_input(struct auth_connection *conn)
{
char *line;
switch (i_stream_read(conn->input)) {
case 0:
return;
case -1:
/* disconnected */
e_error(conn->dir->event, "Auth server disconnected unexpectedly");
auth_connection_disconnected(&conn);
return;
case -2:
/* buffer full */
e_error(conn->dir->event,
"BUG: Auth server sent us more than %d bytes",
(int)AUTH_CLIENT_MAX_LINE_LENGTH);
auth_connection_disconnected(&conn);
return;
}
while ((line = i_stream_next_line(conn->input)) != NULL) {
T_BEGIN {
conn->callback(line, conn->context);
safe_memset(line, 0, strlen(line));
} T_END;
}
}
struct auth_connection *
auth_connection_init(struct director *dir, const char *path)
{
struct auth_connection *conn;
conn = i_new(struct auth_connection, 1);
conn->dir = dir;
conn->fd = -1;
conn->path = i_strdup(path);
DLLIST_PREPEND(&auth_connections, conn);
return conn;
}
void auth_connection_set_callback(struct auth_connection *conn,
auth_input_callback *callback, void *context)
{
conn->callback = callback;
conn->context = context;
}
int auth_connection_connect(struct auth_connection *conn)
{
i_assert(conn->fd == -1);
conn->fd = net_connect_unix_with_retries(conn->path, 1000);
if (conn->fd == -1) {
e_error(conn->dir->event, "connect(%s) failed: %m", conn->path);
return -1;
}
conn->input = i_stream_create_fd(conn->fd, AUTH_CLIENT_MAX_LINE_LENGTH);
conn->output = o_stream_create_fd(conn->fd, SIZE_MAX);
o_stream_set_no_error_handling(conn->output, TRUE);
conn->io = io_add(conn->fd, IO_READ, auth_connection_input, conn);
return 0;
}
void auth_connection_deinit(struct auth_connection **_conn)
{
struct auth_connection *conn = *_conn;
*_conn = NULL;
DLLIST_REMOVE(&auth_connections, conn);
if (conn->fd != -1) {
io_remove(&conn->io);
i_stream_unref(&conn->input);
o_stream_unref(&conn->output);
if (close(conn->fd) < 0)
e_error(conn->dir->event, "close(auth connection) failed: %m");
}
i_free(conn->path);
i_free(conn);
}
static void auth_connection_disconnected(struct auth_connection **_conn)
{
struct auth_connection *conn = *_conn;
*_conn = NULL;
/* notify callback. it should deinit this connection */
conn->callback(NULL, conn->context);
}
struct ostream *auth_connection_get_output(struct auth_connection *conn)
{
i_assert(conn->output != NULL);
return conn->output;
}
void auth_connections_deinit(void)
{
while (auth_connections != NULL) {
struct auth_connection *conn = auth_connections;
auth_connection_disconnected(&conn);
}
}
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