arch/um/drivers/slip.h

   1 #ifndef __UM_SLIP_H
   2 #define __UM_SLIP_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 struct slip_data {
  10         void *dev;
  11         char name[sizeof("slnnnnn\0")];
  12         char *addr;
  13         char *gate_addr;
  14         int slave;
  15         char ibuf[ENC_BUF_SIZE];
  16         char obuf[ENC_BUF_SIZE];
  17         int more; /* more data: do not read fd until ibuf has been drained */
  18         int pos;
  19         int esc;
  20 };
  21
  22 extern struct net_user_info slip_user_info;
  23
  24 extern int set_umn_addr(int fd, char *addr, char *ptp_addr);
  25 extern int slip_user_read(int fd, void *buf, int len, struct slip_data *pri);
  26 extern int slip_user_write(int fd, void *buf, int len, struct slip_data *pri);
  27
  28 #endif
  29
  30 /*
  31  * Overrides for Emacs so that we follow Linus's tabbing style.
  32  * Emacs will notice this stuff at the end of the file and automatically
  33  * adjust the settings for this buffer only.  This must remain at the end
  34  * of the file.
  35  * ---------------------------------------------------------------------------
  36  * Local variables:
  37  * c-file-style: "linux"
  38  * End:
  39  */