libvirt/qemud/internal.h

/*
 * internal.h: daemon data structure definitions
 *
 * Copyright (C) 2006, 2007 Red Hat, Inc.
 * Copyright (C) 2006 Daniel P. Berrange
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
 *
 * Author: Daniel P. Berrange <berrange@redhat.com>
 */


#ifndef QEMUD_INTERNAL_H__
#define QEMUD_INTERNAL_H__

#include <gnutls/gnutls.h>
#include <gnutls/x509.h>

#include "protocol.h"
#include "remote_protocol.h"
#include "../config.h"

#ifdef __GNUC__
#ifdef HAVE_ANSIDECL_H
#include <ansidecl.h>
#endif
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__((__unused__))
#endif
#ifndef ATTRIBUTE_FORMAT
#define ATTRIBUTE_FORMAT(args...) __attribute__((__format__ (args)))
#endif
#else
#define ATTRIBUTE_UNUSED
#define ATTRIBUTE_FORMAT(...)
#endif

#define UUID_LEN 16

typedef enum {
    QEMUD_ERR,
    QEMUD_WARN,
    QEMUD_INFO,
#ifdef ENABLE_DEBUG
    QEMUD_DEBUG
#endif
} qemudLogPriority;


enum qemud_mode {
    QEMUD_MODE_RX_HEADER,
    QEMUD_MODE_RX_PAYLOAD,
    QEMUD_MODE_TX_PACKET,
    QEMUD_MODE_TLS_HANDSHAKE,
};

/* These have to remain compatible with gnutls_record_get_direction. */
enum qemud_tls_direction {
    QEMUD_TLS_DIRECTION_READ = 0,
    QEMUD_TLS_DIRECTION_WRITE = 1,
};

/* Stores the per-client connection state */
struct qemud_client {
    int magic;

    int fd;
    int readonly;
    enum qemud_mode mode;

    struct sockaddr_storage addr;
    socklen_t addrlen;

    /* If set, TLS is required on this socket. */
    int tls;
    gnutls_session_t session;
    enum qemud_tls_direction direction;

    unsigned int incomingSerial;
    unsigned int outgoingSerial;

    char buffer [REMOTE_MESSAGE_MAX];
    unsigned int bufferLength;
    unsigned int bufferOffset;

    /* This is only valid if a remote open call has been made on this
     * connection, otherwise it will be NULL.  Also if remote close is
     * called, it will be set back to NULL if that succeeds.
     */
    virConnectPtr conn;

    struct qemud_client *next;
};

#define QEMUD_CLIENT_MAGIC 0x7788aaee


struct qemud_socket {
    int fd;
    int readonly;
    /* If set, TLS is required on this socket. */
    int tls;

    struct qemud_socket *next;
};

/* Main server state */
struct qemud_server {
    int nsockets;
    struct qemud_socket *sockets;
    int nclients;
    struct qemud_client *clients;
    int sigread;
    char logDir[PATH_MAX];
    unsigned int shutdown : 1;
};

void qemudLog(int priority, const char *fmt, ...)
    ATTRIBUTE_FORMAT(printf,2,3);

#ifdef ENABLE_DEBUG
#define qemudDebug(...) qemudLog(QEMUD_DEBUG, __VA_ARGS__)
#else
#define qemudDebug(fmt, ...) do {} while(0)
#endif

void remoteDispatchClientRequest (struct qemud_server *server,
                                  struct qemud_client *client);


#endif

/*
 * Local variables:
 *  indent-tabs-mode: nil
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  tab-width: 4
 * End:
 */