text: /***
   *
   *  include/rtnet_socket.h
   *
   *  RTnet - real-time networking subsystem
   *  Copyright (C) 1999       Lineo, Inc
   *                1999, 2002 David A. Schleef <ds@schleef.org>
   *                2002       Ulrich Marx <marx@kammer.uni-hannover.de>
   *                2003-2005  Jan Kiszka <jan.kiszka@web.de>
   *
   *  This program 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.
   *
   *  This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
   *
   */
  
  #ifndef __RTNET_SOCKET_H_
  #define __RTNET_SOCKET_H_
  
  #include <asm/atomic.h>
  #include <linux/list.h>
  
  #include <rtdev.h>
  #include <rtnet.h>
  #include <rtdm/driver.h>
  #include <stack_mgr.h>
  
  #include <rtdm/driver.h>
  
  
  struct rtsocket {
      unsigned short          protocol;
  
      struct rtskb_pool       skb_pool;
      unsigned int            pool_size;
      struct mutex            pool_nrt_lock;
  
      struct rtskb_queue      incoming;
  
      rtdm_lock_t             param_lock;
  
      unsigned int            priority;
      nanosecs_rel_t          timeout;    /* receive timeout, 0 for infinite */
  
      rtdm_sem_t              pending_sem;
  
      void                    (*callback_func)(struct rtdm_fd *, void *arg);
      void                    *callback_arg;
  
      unsigned long           flags;
  
      union {
  	/* IP specific */
  	struct {
  	    u32             saddr;      /* source ip-addr (bind) */
  	    u32             daddr;      /* destination ip-addr */
  	    u16             sport;      /* source port */
  	    u16             dport;      /* destination port */
  
  	    int             reg_index;  /* index in port registry */
  	    u8              tos;
  	    u8              state;
  	} inet;
  
  	/* packet socket specific */
  	struct {
  	    struct rtpacket_type packet_type;
  	    int                  ifindex;
  	} packet;
      } prot;
  
      struct module *owner;
  };
  
  
  static inline struct rtdm_fd *rt_socket_fd(struct rtsocket *sock)
  {
      return rtdm_private_to_fd(sock);
  }
  
  #define rt_socket_reference(sock)   \
      rtdm_fd_lock(rt_socket_fd(sock))
  #define rt_socket_dereference(sock) \
      rtdm_fd_unlock(rt_socket_fd(sock))
  
  int __rt_socket_init(struct rtdm_fd *fd, unsigned short protocol,
  		struct module *module);
  #define rt_socket_init(fd, proto) \
      __rt_socket_init(fd, proto, THIS_MODULE)
  
  void rt_socket_cleanup(struct rtdm_fd *fd);
  int rt_socket_common_ioctl(struct rtdm_fd *fd, int request, void *arg);
  int rt_socket_if_ioctl(struct rtdm_fd *fd, int request, void *arg);
  int rt_socket_select_bind(struct rtdm_fd *fd,
  			  rtdm_selector_t *selector,
  			  enum rtdm_selecttype type,
  			  unsigned fd_index);
  
  int __rt_bare_socket_init(struct rtdm_fd *fd, unsigned short protocol,
  			unsigned int priority, unsigned int pool_size,
  			struct module *module);
  #define rt_bare_socket_init(fd, proto, prio, pool_sz) \
      __rt_bare_socket_init(fd, proto, prio, pool_sz, THIS_MODULE)
  
  static inline void rt_bare_socket_cleanup(struct rtsocket *sock)
  {
      rtskb_pool_release(&sock->skb_pool);
      module_put(sock->owner);
  }
  
  #endif  /* __RTNET_SOCKET_H_ */
  