arch/um/drivers/slirp.h

   1 #ifndef __UM_SLIRP_H
   2 #define __UM_SLIRP_H
   3
   4 #define BUF_SIZE 1500
   5  /* two bytes each for a (pathological) max packet of escaped chars +  *
   6   * terminating END char + initial END char                            */
   7 #define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
   8
   9 #define SLIRP_MAX_ARGS 100
  10 /*
  11  * XXX this next definition is here because I don't understand why this
  12  * initializer doesn't work in slirp_kern.c:
  13  *
  14  *   argv :  { init->argv[ 0 ... SLIRP_MAX_ARGS-1 ] },
  15  *
  16  * or why I can't typecast like this:
  17  *
  18  *   argv :  (char* [SLIRP_MAX_ARGS])(init->argv),
  19  */
  20 struct arg_list_dummy_wrapper { char *argv[SLIRP_MAX_ARGS]; };
  21
  22 struct slirp_data {
  23         void *dev;
  24         struct arg_list_dummy_wrapper argw;
  25         int pid;
  26         int slave;
  27         char ibuf[ENC_BUF_SIZE];
  28         char obuf[ENC_BUF_SIZE];
  29         int more; /* more data: do not read fd until ibuf has been drained */
  30         int pos;
  31         int esc;
  32 };
  33
  34 extern struct net_user_info slirp_user_info;
  35
  36 extern int set_umn_addr(int fd, char *addr, char *ptp_addr);
  37 extern int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri);
  38 extern int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri);
  39
  40 #endif
  41
  42 /*
  43  * Overrides for Emacs so that we follow Linus's tabbing style.
  44  * Emacs will notice this stuff at the end of the file and automatically
  45  * adjust the settings for this buffer only.  This must remain at the end
  46  * of the file.
  47  * ---------------------------------------------------------------------------
  48  * Local variables:
  49  * c-file-style: "linux"
  50  * End:
  51  */