1  /* Copyright (C) 1997-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _NETINET_IF_TR_H
      19  #define	_NETINET_IF_TR_H 1
      20  
      21  #include <sys/types.h>
      22  #include <stdint.h>
      23  
      24  /* IEEE 802.5 Token-Ring magic constants.  The frame sizes omit the preamble
      25     and FCS/CRC (frame check sequence). */
      26  #define TR_ALEN		6		/* Octets in one token-ring addr */
      27  #define TR_HLEN 	(sizeof (struct trh_hdr) + sizeof (struct trllc))
      28  #define AC		0x10
      29  #define LLC_FRAME 	0x40
      30  
      31  /* LLC and SNAP constants */
      32  #define EXTENDED_SAP 	0xAA
      33  #define UI_CMD       	0x03
      34  
      35  /* This is an Token-Ring frame header. */
      36  struct trh_hdr
      37  {
      38    uint8_t  ac;			/* access control field */
      39    uint8_t  fc;			/* frame control field */
      40    uint8_t  daddr[TR_ALEN];	/* destination address */
      41    uint8_t  saddr[TR_ALEN];	/* source address */
      42    uint16_t rcf;			/* route control field */
      43    uint16_t rseg[8];		/* routing registers */
      44  };
      45  
      46  /* This is an Token-Ring LLC structure */
      47  struct trllc
      48  {
      49    uint8_t  dsap;		/* destination SAP */
      50    uint8_t  ssap;		/* source SAP */
      51    uint8_t  llc;			/* LLC control field */
      52    uint8_t  protid[3];		/* protocol id */
      53    uint16_t ethertype;		/* ether type field */
      54  };
      55  
      56  /* Token-Ring statistics collection data. */
      57  struct tr_statistics
      58  {
      59    unsigned long rx_packets;     /* total packets received	*/
      60    unsigned long tx_packets;	/* total packets transmitted	*/
      61    unsigned long rx_bytes;	/* total bytes received   	*/
      62    unsigned long tx_bytes;	/* total bytes transmitted	*/
      63    unsigned long rx_errors;	/* bad packets received		*/
      64    unsigned long tx_errors;	/* packet transmit problems	*/
      65    unsigned long rx_dropped;	/* no space in linux buffers	*/
      66    unsigned long tx_dropped;	/* no space available in linux	*/
      67    unsigned long multicast;	/* multicast packets received	*/
      68    unsigned long transmit_collision;
      69  
      70    /* detailed Token-Ring errors. See IBM Token-Ring Network
      71       Architecture for more info */
      72  
      73    unsigned long line_errors;
      74    unsigned long internal_errors;
      75    unsigned long burst_errors;
      76    unsigned long A_C_errors;
      77    unsigned long abort_delimiters;
      78    unsigned long lost_frames;
      79    unsigned long recv_congest_count;
      80    unsigned long frame_copied_errors;
      81    unsigned long frequency_errors;
      82    unsigned long token_errors;
      83    unsigned long dummy1;
      84  };
      85  
      86  /* source routing stuff */
      87  #define TR_RII 			0x80
      88  #define TR_RCF_DIR_BIT 		0x80
      89  #define TR_RCF_LEN_MASK 	0x1f00
      90  #define TR_RCF_BROADCAST 	0x8000	/* all-routes broadcast */
      91  #define TR_RCF_LIMITED_BROADCAST 0xC000	/* single-route broadcast */
      92  #define TR_RCF_FRAME2K 		0x20
      93  #define TR_RCF_BROADCAST_MASK 	0xC000
      94  #define TR_MAXRIFLEN 		18
      95  
      96  #ifdef __USE_MISC
      97  
      98  struct trn_hdr
      99  {
     100    uint8_t trn_ac;                /* access control field */
     101    uint8_t trn_fc;                /* field control field */
     102    uint8_t trn_dhost[TR_ALEN];    /* destination host */
     103    uint8_t trn_shost[TR_ALEN];    /* source host */
     104    uint16_t trn_rcf;              /* route control field */
     105    uint16_t trn_rseg[8];          /* routing registers */
     106  };
     107  
     108  #endif
     109  
     110  #endif	/* netinet/if_tr.h */