| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Defines for the Multi-KISS driver. |
| 3 | ****************************************************************************/ |
| 4 | |
| 5 | #define AX25_MAXDEV 16 /* MAX number of AX25 channels; |
| 6 | This can be overridden with |
| 7 | insmod -oax25_maxdev=nnn */ |
| 8 | #define AX_MTU 236 |
| 9 | |
| 10 | /* SLIP/KISS protocol characters. */ |
| 11 | #define END 0300 /* indicates end of frame */ |
| 12 | #define ESC 0333 /* indicates byte stuffing */ |
| 13 | #define ESC_END 0334 /* ESC ESC_END means END 'data' */ |
| 14 | #define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */ |
| 15 | |
| 16 | struct ax_disp { |
| 17 | int magic; |
| 18 | |
| 19 | /* Various fields. */ |
| 20 | struct tty_struct *tty; /* ptr to TTY structure */ |
| 21 | struct net_device *dev; /* easy for intr handling */ |
| 22 | |
| 23 | /* These are pointers to the malloc()ed frame buffers. */ |
| 24 | unsigned char *rbuff; /* receiver buffer */ |
| 25 | int rcount; /* received chars counter */ |
| 26 | unsigned char *xbuff; /* transmitter buffer */ |
| 27 | unsigned char *xhead; /* pointer to next byte to XMIT */ |
| 28 | int xleft; /* bytes left in XMIT queue */ |
| 29 | |
| 30 | /* SLIP interface statistics. */ |
| 31 | unsigned long rx_packets; /* inbound frames counter */ |
| 32 | unsigned long tx_packets; /* outbound frames counter */ |
| 33 | unsigned long rx_bytes; /* inbound bytes counter */ |
| 34 | unsigned long tx_bytes; /* outbound bytes counter */ |
| 35 | unsigned long rx_errors; /* Parity, etc. errors */ |
| 36 | unsigned long tx_errors; /* Planned stuff */ |
| 37 | unsigned long rx_dropped; /* No memory for skb */ |
| 38 | unsigned long tx_dropped; /* When MTU change */ |
| 39 | unsigned long rx_over_errors; /* Frame bigger then SLIP buf. */ |
| 40 | |
| 41 | /* Detailed SLIP statistics. */ |
| 42 | int mtu; /* Our mtu (to spot changes!) */ |
| 43 | int buffsize; /* Max buffers sizes */ |
| 44 | |
| 45 | |
| 46 | unsigned long flags; /* Flag values/ mode etc */ |
| 47 | /* long req'd: used by set_bit --RR */ |
| 48 | #define AXF_INUSE 0 /* Channel in use */ |
| 49 | #define AXF_ESCAPE 1 /* ESC received */ |
| 50 | #define AXF_ERROR 2 /* Parity, etc. error */ |
| 51 | #define AXF_KEEPTEST 3 /* Keepalive test flag */ |
| 52 | #define AXF_OUTWAIT 4 /* is outpacket was flag */ |
| 53 | |
| 54 | int mode; |
| 55 | int crcmode; /* MW: for FlexNet, SMACK etc. */ |
| 56 | #define CRC_MODE_NONE 0 |
| 57 | #define CRC_MODE_FLEX 1 |
| 58 | #define CRC_MODE_SMACK 2 |
| 59 | spinlock_t buflock; /* lock for rbuf and xbuf */ |
| 60 | }; |
| 61 | |
| 62 | #define AX25_MAGIC 0x5316 |