qemu/slirp/if.h

   1 /*
   2  * Copyright (c) 1995 Danny Gasparovski.
   3  *
   4  * Please read the file COPYRIGHT for the
   5  * terms and conditions of the copyright.
   6  */
   7
   8 #ifndef _IF_H_
   9 #define _IF_H_
  10
  11 #define IF_COMPRESS     0x01    /* We want compression */
  12 #define IF_NOCOMPRESS   0x02    /* Do not do compression */
  13 #define IF_AUTOCOMP     0x04    /* Autodetect (default) */
  14 #define IF_NOCIDCOMP    0x08    /* CID compression */
  15
  16 #define IF_MTU 1500
  17 #define IF_MRU 1500
  18 #define IF_COMP IF_AUTOCOMP     /* Flags for compression */
  19
  20 #if 0
  21 /*
  22  * Set if_maxlinkhdr to 48 because it's 40 bytes for TCP/IP,
  23  * and 8 bytes for PPP, but need to have it on an 8byte boundary
  24  */
  25 #ifdef USE_PPP
  26 #define IF_MAXLINKHDR 48
  27 #else
  28 #define IF_MAXLINKHDR 40
  29 #endif
  30 #else
  31         /* 2 for alignment, 14 for ethernet, 40 for TCP/IP */
  32 #define IF_MAXLINKHDR (2 + 14 + 40)
  33 #endif
  34
  35 extern int      if_queued;      /* Number of packets queued so far */
  36
  37 extern  struct mbuf if_fastq;                  /* fast queue (for interactive data) */
  38 extern  struct mbuf if_batchq;                 /* queue for non-interactive data */
  39 extern  struct mbuf *next_m;
  40
  41 #define ifs_init(ifm) ((ifm)->ifs_next = (ifm)->ifs_prev = (ifm))
  42
  43 #ifdef LOG_ENABLED
  44 /* Interface statistics */
  45 struct slirp_ifstats {
  46         u_int out_pkts;         /* Output packets */
  47         u_int out_bytes;                /* Output bytes */
  48         u_int out_errpkts;      /* Output Error Packets */
  49         u_int out_errbytes;     /* Output Error Bytes */
  50         u_int in_pkts;          /* Input packets */
  51         u_int in_bytes;         /* Input bytes */
  52         u_int in_errpkts;               /* Input Error Packets */
  53         u_int in_errbytes;      /* Input Error Bytes */
  54
  55         u_int bytes_saved;      /* Number of bytes that compression "saved" */
  56                                 /* ie: number of bytes that didn't need to be sent over the link
  57                                  * because of compression */
  58
  59         u_int in_mbad;          /* Bad incoming packets */
  60 };
  61 #endif
  62
  63 #endif