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/* assuan-socket-server.c - Assuan socket based server
* Copyright (C) 2002 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include "assuan-defs.h"
static int
accept_connection_bottom (ASSUAN_CONTEXT ctx)
{
int fd = ctx->connected_fd;
ctx->client_pid = (pid_t)-1;
#ifdef HAVE_SO_PEERCRED
{
struct ucred cr;
int cl = sizeof cr;
if ( !getsockopt (fd, SOL_SOCKET, SO_PEERCRED, &cr, &cl) )
ctx->client_pid = cr.pid;
}
#endif
ctx->inbound.fd = fd;
ctx->inbound.eof = 0;
ctx->inbound.linelen = 0;
ctx->inbound.attic.linelen = 0;
ctx->inbound.attic.pending = 0;
ctx->outbound.fd = fd;
ctx->outbound.data.linelen = 0;
ctx->outbound.data.error = 0;
ctx->confidential = 0;
return 0;
}
static int
accept_connection (ASSUAN_CONTEXT ctx)
{
int fd;
struct sockaddr_un clnt_addr;
size_t len = sizeof clnt_addr;
ctx->client_pid = (pid_t)-1;
fd = accept (ctx->listen_fd, (struct sockaddr*)&clnt_addr, &len );
if (fd == -1)
{
ctx->os_errno = errno;
return ASSUAN_Accept_Failed;
}
ctx->connected_fd = fd;
return accept_connection_bottom (ctx);
}
static int
finish_connection (ASSUAN_CONTEXT ctx)
{
if (ctx->inbound.fd != -1)
{
close (ctx->inbound.fd);
}
ctx->inbound.fd = -1;
ctx->outbound.fd = -1;
return 0;
}
static void
deinit_socket_server (ASSUAN_CONTEXT ctx)
{
finish_connection (ctx);
}
/* Initialize a server for the socket LISTEN_FD which has already be
put into listen mode */
int
assuan_init_socket_server (ASSUAN_CONTEXT *r_ctx, int listen_fd)
{
ASSUAN_CONTEXT ctx;
int rc;
*r_ctx = NULL;
ctx = xtrycalloc (1, sizeof *ctx);
if (!ctx)
return ASSUAN_Out_Of_Core;
ctx->is_server = 1;
ctx->input_fd = -1;
ctx->output_fd = -1;
ctx->inbound.fd = -1;
ctx->outbound.fd = -1;
ctx->listen_fd = listen_fd;
ctx->connected_fd = -1;
ctx->deinit_handler = deinit_socket_server;
ctx->accept_handler = accept_connection;
ctx->finish_handler = finish_connection;
rc = _assuan_register_std_commands (ctx);
if (rc)
xfree (ctx);
else
*r_ctx = ctx;
return rc;
}
/* Initialize a server using the already accepted socket FD. */
int
assuan_init_connected_socket_server (ASSUAN_CONTEXT *r_ctx, int fd)
{
ASSUAN_CONTEXT ctx;
int rc;
*r_ctx = NULL;
ctx = xtrycalloc (1, sizeof *ctx);
if (!ctx)
return ASSUAN_Out_Of_Core;
ctx->is_server = 1;
ctx->pipe_mode = 1; /* we wan't a second accept to indicate EOF */
ctx->input_fd = -1;
ctx->output_fd = -1;
ctx->inbound.fd = -1;
ctx->outbound.fd = -1;
ctx->listen_fd = -1;
ctx->connected_fd = fd;
ctx->deinit_handler = deinit_socket_server;
ctx->accept_handler = accept_connection_bottom;
ctx->finish_handler = finish_connection;
rc = _assuan_register_std_commands (ctx);
if (rc)
xfree (ctx);
else
*r_ctx = ctx;
return rc;
}
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