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Rev 3601 Rev 3643
Line 154... Line 154...
154 
        pop     si
 154 
        pop     si
155 
        cmp     dx, si
 155 
        cmp     dx, si
156 
        pop     ecx edx
 156 
        pop     ecx edx
157 
        jne     .checksum_mismatch
 157 
        jne     .checksum_mismatch
Line -... Line 158...
- 
 
 158 
 
- 
 
 159 
; Check packet type
158 
 
 160 
 
159 
        cmp     [edx + ICMP_header.Type], ICMP_ECHO             ; Is this an echo request?
 161 
        cmp     [edx + ICMP_header.Type], ICMP_ECHO             ; Is this an echo request?
Line -... Line 162...
- 
 
 162 
        jne     .check_sockets
- 
 
 163 
 
- 
 
 164 
; Update stats (and validate device ptr)
- 
 
 165 
        call    NET_ptr_to_num4
- 
 
 166 
        cmp     edi, -1
- 
 
 167 
        je      .dump
160 
        jne     .check_sockets
 168 
        inc     [ICMP_PACKETS_RX + edi]
161 
 
 169 
 
Line 162... Line 170...
162 
; We well re-use the packet so we can create the response as fast as possible
 170 
; We well re-use the packet so we can create the response as fast as possible
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; Notice: this only works on pure ethernet
 171 
; Notice: this only works on pure ethernet
Line 164... Line 172...
164 
 
 172 
 
165 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "got echo request\n"
 - 
 
166 
        mov     [edx + ICMP_header.Type], ICMP_ECHOREPLY        ; Change Packet type to reply
 - 
 
167 
 
 - 
 
168 
        mov     esi, [esp]                                      ; Start of buffer
 - 
 
169 
 
 - 
 
170 
; Update stats (and validate device ptr)
 - 
 
171 
        call    NET_ptr_to_num
 - 
 
172 
        cmp     edi, -1
 - 
 
173 
        je      .dump
 173 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "got echo request\n"
174 
        inc     [ICMP_PACKETS_RX + 4*edi]
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        mov     [edx + ICMP_header.Type], ICMP_ECHOREPLY        ; Change Packet type to reply
Line 175... Line 175...
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        inc     [ICMP_PACKETS_TX + 4*edi]
 175 
 
Line 223... Line 223...
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        call    checksum_2                                      ;
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        call    checksum_2                                      ;
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        mov     [eax + ICMP_header.Checksum], dx                ;
 224 
        mov     [eax + ICMP_header.Checksum], dx                ;
Line 225... Line 225...
225 
 
 225 
 
226 
; Transmit the packet (notice that packet ptr and packet size have been on stack since start of the procedure!)
 226 
; Transmit the packet (notice that packet ptr and packet size have been on stack since start of the procedure!)
- 
 
 227 
        call    [ebx + NET_DEVICE.transmit]
- 
 
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        test    eax, eax
- 
 
 229 
        jnz     @f
- 
 
 230 
        call    NET_ptr_to_num4
- 
 
 231 
        inc     [UDP_PACKETS_TX + edi]
227 
        call    [ebx + NET_DEVICE.transmit]
 232 
       @@:
Line 252... Line 257...
252 
        jne     .next_socket
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        jne     .next_socket
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253 
 
 258 
 
254 
;        cmp     [eax + ICMP_SOCKET.Identifier],
 259 
;        cmp     [eax + ICMP_SOCKET.Identifier],
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- 
 
 260 
;        jne     .next_socket
255 
;        jne     .next_socket
 261 
 
256 
 
 262 
; Update stats (and validate device ptr)
257 
;        call    IPv4_dest_to_dev
 263 
        call    NET_ptr_to_num4
258 
;        cmp     edi,-1
 264 
        cmp     edi, -1
Line 259... Line 265...
259 
;        je      .dump
 265 
        je      .dump
Line 260... Line 266...
260 
;        inc     [ICMP_PACKETS_RX+edi]
 266 
        inc     [ICMP_PACKETS_RX + edi]
261 
 
 267 
 
Line 334... Line 340...
334 
 
 340 
 
335 
        sub     edi, edx                                ;;; TODO: find a better way to remember start of packet
 341 
        sub     edi, edx                                ;;; TODO: find a better way to remember start of packet
336 
        push    edx edi
 342 
        push    edx edi
337 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
 343 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
- 
 
 344 
        call    [ebx + NET_DEVICE.transmit]
- 
 
 345 
        test    eax, eax
- 
 
 346 
        jnz     @f
- 
 
 347 
        call    NET_ptr_to_num4
- 
 
 348 
        inc     [ICMP_PACKETS_TX + edi]
338 
        call    [ebx + NET_DEVICE.transmit]
 349 
       @@:
339 
        ret
 350 
        ret
340 
  .exit:
 351 
  .exit:
341 
        DEBUGF  DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
 352 
        DEBUGF  DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
342 
        add     esp, 2*4 + 2
 353 
        add     esp, 2*4 + 2
Line 384... Line 395...
384 
        call    checksum_2
 395 
        call    checksum_2
385 
        mov     [edi + ICMP_header.Checksum], dx
 396 
        mov     [edi + ICMP_header.Checksum], dx
Line 386... Line 397...
386 
 
 397 
 
387 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
 398 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "Sending ICMP Packet\n"
- 
 
 399 
        call    [ebx + NET_DEVICE.transmit]
- 
 
 400 
        test    eax, eax
- 
 
 401 
        jnz     @f
- 
 
 402 
        call    NET_ptr_to_num4
- 
 
 403 
        inc     [ICMP_PACKETS_TX + edi]
388 
        call    [ebx + NET_DEVICE.transmit]
 404 
       @@:
389 
        ret
 405 
        ret
390 
  .exit:
 406 
  .exit:
391 
        DEBUGF  DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
 407 
        DEBUGF  DEBUG_NETWORK_ERROR, "Creating ICMP Packet failed\n"
392 
        add     esp, 4
 408 
        add     esp, 4