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  1. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  2. ;;                                                                 ;;
  3. ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved.    ;;
  4. ;; Distributed under terms of the GNU General Public License       ;;
  5. ;;                                                                 ;;
  6. ;;  ETHERNET.INC                                                   ;;
  7. ;;                                                                 ;;
  8. ;;  Ethernet network layer for Menuet OS                           ;;
  9. ;;                                                                 ;;
  10. ;;  This file contains the following:                              ;;
  11. ;;      PCI bus scanning for valid devices                         ;;
  12. ;;      Table of supported ethernet drivers                        ;;
  13. ;;      Code to identify and activate a supported driver           ;;
  14. ;;      ARP handler                                                ;;
  15. ;;      Driver interface to the IP layer                           ;;
  16. ;;      Gateway support                                            ;;
  17. ;;                                                                 ;;
  18. ;;  Individual driver files are included here                      ;;
  19. ;;                                                                 ;;
  20. ;;  The PCI bus scanning code was ported from the etherboot        ;;
  21. ;;  5.0.6 project. The copyright statement for that code is        ;;
  22. ;;                                                                 ;;
  23. ;;          GNU GENERAL PUBLIC LICENSE                             ;;
  24. ;;             Version 2, June 1991                                ;;
  25. ;;                                                                 ;;
  26. ;;  remaining parts Copyright 2002 Mike Hibbett                    ;;
  27. ;;   mikeh@oceanfree.net                                           ;;
  28. ;;                                                                 ;;
  29. ;;  See file COPYING for details                                   ;;
  30. ;;                                                                 ;;
  31. ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  32.  
  33. $Revision: 2971 $
  34.  
  35.  
  36. ;********************************************************************
  37. ;   Interface
  38. ;      ethernet_driver   called by stack_handler in stack.inc
  39. ;      eth_probe         called by app_stack_handler in stack.inc
  40. ;
  41. ;********************************************************************
  42.  
  43. ETHER_IP                    equ     0x0008      ; Reversed from 0800 for intel
  44. ETHER_ARP                   equ     0x0608      ; Reversed from 0806 for intel
  45. ETHER_RARP                  equ     0x3580
  46.  
  47. struc ETH_FRAME
  48. {  .DstMAC       dp   ?  ;destination MAC-address [6 bytes]
  49.    .SrcMAC       dp   ?  ;source MAC-address [6 bytes]
  50.    .Type         dw   ?  ;type of the upper-layer protocol [2 bytes]
  51.    .Data         db   ?  ;data [46-1500 bytes]
  52. }
  53.  
  54. virtual at Ether_buffer
  55.   ETH_FRAME ETH_FRAME
  56. end virtual
  57.  
  58.  
  59. ; Some useful information on data structures
  60.  
  61. ;     Ethernet Packet - ARP Request example
  62. ;
  63. ;   0                   1                   2                   3
  64. ;   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  65. ;
  66. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  67. ;   |       Dest   H/W Address                                      |
  68. ;   |                    ( 14 byte header )                         |
  69. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  70. ;   |                               |     Source     H/W Address    |
  71. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  72. ;   |                                                               |
  73. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  74. ;   |    Protocol - ARP 08  06      |
  75. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  76.  
  77. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  78. ;   |  H/W Type  00           01    |  Protocol Type   08 00        |
  79. ;   |                   ( ARP Request packet )                      |
  80. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  81. ;   | HLen    0x06  | PLen    0x04  |    OpCode        00   01      |
  82. ;   |               ( 0001 for request, 0002 for reply )            |
  83. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  84. ;   | Source Hardware Address ( MAC Address )                       |
  85. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  86. ;   |                               |  Source IP Address            |
  87. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  88. ;   |                               | Destination Hardware Address  |
  89. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  90. ;   |                                                               |
  91. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  92. ;   | Destination IP Address                                        |
  93. ;   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  94.  
  95. ; Include individual drivers source files at this point.
  96. ; If you create a new driver, include it below.
  97.  
  98. include "drivers/rtl8029.inc"
  99. include "drivers/i8255x.inc"
  100. include "drivers/rtl8139.inc"
  101. include "drivers/3c59x.inc"
  102. include "drivers/sis900.inc"
  103. include "drivers/pcnet32.inc"
  104. include "drivers/rtl8169.inc"
  105. include "drivers/forcedeth.inc"
  106.  
  107. ; PCICards
  108. ; ========
  109. ; PCI vendor and hardware types for hardware supported by the above drivers
  110. ; If you add a driver, ensure you update this datastructure, otherwise the
  111. ; card will not be probed.
  112. ; Each driver is defined by 4 double words. These are
  113. ;   PCIVendorDevice  probeFunction ResetFunction PollFunction transmitFunction
  114. ; The last entry must be kept at all zeros, to indicate the end of the list
  115. ; As a PCI driver may support more than one hardware implementation, there may
  116. ; be several lines which refer to the same functions.
  117. ; The first driver found on the PCI bus will be the one used.
  118.  
  119. PCICARDS_ENTRY_SIZE         equ     24    ; Size of each PCICARDS entry
  120.  
  121. iglobal
  122. PCICards:
  123. dd  0x12098086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
  124. dd  0x10298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
  125. dd  0x12298086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
  126. dd  0x10308086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
  127. dd  0x24498086, I8255x_probe, I8255x_reset, I8255x_poll, I8255x_transmit, 0
  128.  
  129. dd  0x802910ec, rtl8029_probe, rtl8029_reset, rtl8029_poll, rtl8029_transmit, 0
  130.  
  131. dd  0x813910ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable  ; tested by hidnplayr: works ok
  132. dd  0x813810ec, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  133. dd  0x12111113, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable  ; tested by hidnplayr: works ok
  134. dd  0x13601500, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  135. dd  0x13604033, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  136. dd  0x13001186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  137. dd  0x13401186, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  138. dd  0xab0613d1, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  139. dd  0xa1171259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  140. dd  0xa11e1259, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  141. dd  0xab0614ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  142. dd  0xab0714ea, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  143. dd  0x123411db, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  144. dd  0x91301432, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  145. dd  0x101202ac, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  146. dd  0x0106018a, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  147. dd  0x1211126c, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  148. dd  0x81391743, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  149. dd  0x8139021b, rtl8139_probe, rtl8139_reset, rtl8139_poll, rtl8139_transmit, rtl8139_cable
  150.  
  151. dd  0x816810ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
  152. dd  0x816910ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
  153. dd  0x011616ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
  154. dd  0x43001186, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
  155. dd  0x816710ec, rtl8169_probe, rtl8169_reset, rtl8169_poll, rtl8169_transmit, 0
  156.  
  157. dd  0x590010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  158. dd  0x592010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  159. dd  0x597010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  160. dd  0x595010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  161. dd  0x595110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  162. dd  0x595210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  163. dd  0x900010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  164. dd  0x900110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  165. dd  0x900410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  166. dd  0x900510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  167. dd  0x900610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  168. dd  0x900A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  169. dd  0x905010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  170. dd  0x905110b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  171. dd  0x905510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  172. dd  0x905810b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  173. dd  0x905A10b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  174. dd  0x920010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  175. dd  0x980010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  176. dd  0x980510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  177. dd  0x764610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  178. dd  0x505510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  179. dd  0x605510b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  180. dd  0x605610b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  181. dd  0x5b5710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  182. dd  0x505710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  183. dd  0x515710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  184. dd  0x525710b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  185. dd  0x656010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  186. dd  0x656210b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  187. dd  0x656410b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  188. dd  0x450010b7, e3c59x_probe, e3c59x_reset, e3c59x_poll, e3c59x_transmit, 0
  189.  
  190. dd  0x09001039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
  191.  
  192. dd  0x20001022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
  193. dd  0x26251022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
  194. dd  0x20011022, pcnet32_probe, pcnet32_reset, pcnet32_poll, pcnet32_xmit, 0
  195.  
  196. ;dd  0x08031516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
  197.  
  198. ; following cards are untested
  199. dd  0x70161039, SIS900_probe, SIS900_reset, SIS900_poll, SIS900_transmit, 0
  200. ;dd  0x08001516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
  201. ;dd  0x08911516, mtd80x_probe, mtd80x_reset, mtd80x_poll, mtd80x_transmit, mtd80x_cable
  202.  
  203. dd 0x006610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; nVidia Corporation nForce2 Ethernet Controller
  204. dd 0x01c310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  205. dd 0x00D610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  206. dd 0x008610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  207. dd 0x008c10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  208. dd 0x00e610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  209. dd 0x00df10de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  210. dd 0x005610de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  211. dd 0x005710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  212. dd 0x003710de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  213. dd 0x003810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  214. dd 0x026810de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  215. dd 0x026910de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  216. dd 0x037210de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  217. dd 0x037310de, forcedeth_probe, forcedeth_reset, forcedeth_poll, forcedeth_transmit, forcedeth_cable ; not tested
  218.  
  219.  
  220. rb PCICARDS_ENTRY_SIZE  ; end of list marker, do not remove
  221. endg
  222.  
  223. uglobal
  224. ;Net-stack's interface's settings
  225.   node_addr:          db  0,0,0,0,0,0
  226.   gateway_ip:         dd  0
  227.   dns_ip:             dd  0
  228.  
  229.   eth_rx_data_len:    dw  0
  230.   eth_status:         dd  0
  231.   io_addr:            dd  0
  232.   hdrtype:            db  0
  233.   vendor_device:      dd  0
  234.   pci_data:           dd  0
  235.   pci_dev:            dd  0
  236.   pci_bus:            dd  0
  237.  
  238.   ; These will hold pointers to the selected driver functions
  239.   drvr_probe:         dd  0
  240.   drvr_reset:         dd  0
  241.   drvr_poll:          dd  0
  242.   drvr_transmit:      dd  0
  243.   drvr_cable:         dd  0
  244.  
  245. endg
  246.  
  247. iglobal
  248.   broadcast_add:      db  0xff,0xff,0xff,0xff,0xff,0xff
  249.   subnet_mask:        dd  0x00ffffff   ; 255.255.255.0
  250. endg
  251.  
  252. include "arp.inc"    ;arp-protocol functions
  253. include "pci.inc"    ;PCI bus access functions
  254.  
  255.  
  256. ;***************************************************************************
  257. ;   Function
  258. ;      eth_tx
  259. ;
  260. ;   Description
  261. ;      Looks at the NET1OUT_QUEUE for data to send.
  262. ;      Stores that destination IP in a location used by the tx routine
  263. ;      Looks up the MAC address in the ARP table; stores that where
  264. ;      the tx routine can get it
  265. ;      Get the length of the data. Store that where the tx routine wants it
  266. ;      Call tx
  267. ;      Places buffer on empty queue when the tx routine finished
  268. ;
  269. ;***************************************************************************
  270. proc eth_tx stdcall uses ebx esi edi
  271. local MACAddress  dp  ?  ;allocate 6 bytes in the stack
  272.  
  273.     ; Look for a buffer to tx
  274.     mov     eax, NET1OUT_QUEUE
  275.     call    dequeue
  276.     cmp     ax, NO_BUFFER
  277.     je      .exit            ; Exit if no buffer available
  278.  
  279.     push    eax  ;save buffer number
  280.  
  281.     ; convert buffer pointer eax to the absolute address
  282.     imul    eax, IPBUFFSIZE
  283.     add     eax, IPbuffs
  284.  
  285.     ; Extract the destination IP
  286.     ; find the destination IP in the ARP table, get MAC
  287.     ; store this MAC in 'MACAddress'
  288.     mov     ebx, eax               ; Save buffer address
  289.     mov     edx, [ebx + 16]        ; get destination address
  290.  
  291.     ; If the destination address is 255.255.255.255,
  292.     ; set the MACAddress to all ones ( broadcast )
  293.     cld
  294.     mov     esi, broadcast_add
  295.     lea     edi, [MACAddress]
  296.     movsd
  297.     movsw
  298.     cmp     edx, 0xffffffff
  299.     je      .send                ; If it is broadcast, just send
  300.  
  301.     lea     eax, [MACAddress]    ;cause this is local variable
  302.     stdcall arp_table_manager, ARP_TABLE_IP_TO_MAC, edx, eax ;opcode,IP,MAC_ptr - Get the MAC address.
  303.  
  304.     cmp     eax, ARP_VALID_MAPPING
  305.     je      .send
  306.  
  307.     ; No valid entry. Has the request been sent, but timed out?
  308.     cmp     eax, ARP_RESPONSE_TIMEOUT
  309.     je      .freebuf
  310.  
  311.   .wait_response:                   ;we wait arp-response
  312.                                     ; Re-queue the packet, and exit
  313.     pop     ebx
  314.     mov     eax, NET1OUT_QUEUE
  315.     call    queue                        ; Get the buffer back
  316.     jmp     .exit
  317.  
  318.   .send:    ;if ARP_VALID_MAPPING then send the packet
  319.     lea     edi, [MACAddress]     ; Pointer to 48 bit destination address
  320.     movzx   ecx, word[ebx+2]      ; Size of IP packet to send
  321.     xchg    ch, cl                ; because mirror byte-order
  322.     mov     esi, ebx              ; Pointer to packet data
  323.     mov     bx, ETHER_IP          ; Type of packet
  324.     push    ebp
  325.     call    dword [drvr_transmit] ; Call the drivers transmit function
  326.     pop     ebp
  327.  
  328.     ; OK, we have sent a packet, so increment the count
  329.     inc     dword [ip_tx_count]
  330.  
  331.     ; And finally, return the buffer to the free queue
  332.   .freebuf:
  333.     pop     eax
  334.     call    freeBuff
  335.  
  336.   .exit:
  337.     ret
  338. endp
  339.  
  340. ;***************************************************************************
  341. ;   Function
  342. ;      ether_IP_handler
  343. ;
  344. ;   Description
  345. ;      Called when an IP ethernet packet is received on the ethernet
  346. ;      Header + Data is in Ether_buffer[]
  347. ;      We just need to get a buffer from the 'free' queue, and
  348. ;      store the packet in it, then insert the packet number into the
  349. ;      IPRX queue.
  350. ;      If no queue entry is available, the packet is silently discarded
  351. ;      All registers may be destroyed
  352. ;
  353. ;***************************************************************************
  354. ;uglobal
  355. ;  ether_IP_handler_cnt dd ?
  356. ;endg
  357. ether_IP_handler:
  358.     mov     eax, EMPTY_QUEUE
  359.     call    dequeue
  360.     cmp     ax, NO_BUFFER
  361.     je      eiph00x
  362.  
  363.     ; convert buffer pointer eax to the absolute address
  364.     push    eax
  365.     mov     ecx, IPBUFFSIZE
  366.     mul     ecx
  367.     add     eax, IPbuffs
  368.  
  369.     mov     edi, eax
  370.  
  371.     ; get a pointer to the start of the DATA
  372.     mov     esi, ETH_FRAME.Data
  373.  
  374.     ; Now store it all away
  375.     mov     ecx, IPBUFFSIZE / 4     ; Copy all of the available
  376.                               ; data across - worse case
  377.     cld
  378.     rep     movsd
  379.  
  380. ;        inc     [ether_IP_handler_cnt]
  381. ;        DEBUGF  1, "K : ether_IP_handler (%u)\n", [ether_IP_handler_cnt]
  382.  
  383.     ; And finally, place the buffer in the IPRX queue
  384.     pop     ebx
  385.     mov     eax, IPIN_QUEUE
  386.     call    queue
  387.  
  388. eiph00x:
  389.     ret
  390.  
  391. ;***************************************************************************
  392. ;   Function
  393. ;      eth_probe
  394. ;   Description
  395. ;      Searches for an ethernet card. If found, the card is enabled and
  396. ;      the ethernet -> IP link established
  397. ;
  398. ;      This function scans the PCI bus looking for a supported device.
  399. ;      ISA bus is currently not supported.
  400. ;
  401. ;        eax is 0 if no hardware found
  402. ;***************************************************************************
  403. eth_probe:
  404.     ; Find a card on the PCI bus, and get it's address
  405.     call    scan_bus                    ; Find the ethernet cards PIC address
  406.     xor     eax, eax
  407.     cmp     [io_addr], eax
  408.     je      ep_00x                      ; Return 0 in eax if no cards found
  409.  
  410.     call    dword [drvr_probe]          ; Call the drivers probe function
  411.  
  412.     mov     eax, [io_addr]              ; return a non zero value
  413.  
  414. ep_00x:
  415.     ret
  416.  
  417. ;***************************************************************************
  418. ;   Function
  419. ;      ethernet_driver
  420. ;
  421. ;   Description
  422. ;       The ethernet RX and TX handler
  423. ;       This is a kernel function, called by stack_handler
  424. ;
  425. ;***************************************************************************
  426. ethernet_driver:
  427.     ; Do nothing if the driver is inactive
  428.     cmp     [ethernet_active], byte 0
  429.     je      eth_exit
  430.  
  431.     call    eth_rx
  432.     call    eth_tx
  433.  
  434. eth_exit:
  435.     ret
  436.  
  437. ;***************************************************************************
  438. ;   Function
  439. ;      eth_rx
  440. ;
  441. ;   Description
  442. ;      Polls the ethernet card for received data. Extracts if present
  443. ;       Depending on the Protocol within the packet:
  444. ;         ARP : Pass to ARP_handler. This may result in an ARP reply
  445. ;               being tx'ed
  446. ;         IP  : Store in an IP buffer
  447. ;
  448. ;***************************************************************************
  449. eth_rx:
  450.     xor     ax, ax
  451.     mov     [eth_rx_data_len], ax
  452.     call    dword [drvr_poll]       ; Call the drivers poll function
  453.  
  454.     mov     ax, [eth_rx_data_len]
  455.     cmp     ax, 0
  456.     je      .exit
  457.  
  458.  
  459.     ; Check the protocol. Call appropriate handler
  460.  
  461.     mov     ax, [ETH_FRAME.Type]    ; The address of the protocol word
  462.  
  463.     cmp     ax, ETHER_IP
  464.     je      .is_ip                   ; It's IP
  465.  
  466.     cmp     ax, ETHER_ARP
  467.     je      .is_arp                  ; It is ARP
  468.  
  469.     DEBUGF  1,"K : eth_rx - dumped (%u)\n", ax
  470.     inc     [dumped_rx_count]
  471.     jmp     .exit               ; If not IP or ARP, ignore
  472.  
  473.   .is_ip:
  474. ;    DEBUGF  1,"K : eth_rx - IP packet\n"
  475.     inc     dword [ip_rx_count]
  476.     call    ether_IP_handler
  477.     jmp     .exit
  478.  
  479.   .is_arp:
  480. ;    DEBUGF  1,"K : eth_rx - ARP packet\n"
  481.     ; At this point, the packet is still in the Ether_buffer
  482.     call    arp_handler
  483.  
  484.   .exit:
  485.     ret
  486.