Subversion Repositories Kolibri OS

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
4429 Serge 1 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2 
;;                                                                 ;;
3 
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved.    ;;
4 
;; Distributed under terms of the GNU General Public License       ;;
5 
;;                                                                 ;;
6 
;;  loopback.inc                                                   ;;
7 
;;                                                                 ;;
8 
;;  LoopBack device for KolibriOS                                  ;;
9 
;;                                                                 ;;
10 
;;    Written by hidnplayr@kolibrios.org                           ;;
11 
;;                                                                 ;;
12 
;;          GNU GENERAL PUBLIC LICENSE                             ;;
13 
;;             Version 2, June 1991                                ;;
14 
;;                                                                 ;;
15 
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
16 
 
17 
$Revision: 2891 $
18 
 
19 
iglobal
20 
align 4
21 
 
22 
LOOPBACK_DEVICE:
23 
 
24 
        .device_type    dd NET_DEVICE_LOOPBACK
25 
        .mtu            dd 4096
26 
        .name           dd .namestr
27 
 
28 
        .unload         dd .dummy_fn
29 
        .reset          dd .dummy_fn
30 
        .transmit       dd LOOP_input
31 
 
32 
        .bytes_tx       dq 0
33 
        .bytes_rx       dq 0
34 
        .packets_tx     dd 0
35 
        .packets_rx     dd 0
36 
 
37 
        .link_state     dd -1
38 
        .hwacc          dd NET_HWACC_TCP_IPv4_IN + NET_HWACC_TCP_IPv4_OUT
39 
 
40 
        .namestr        db 'loopback', 0
41 
 
42 
        .dummy_fn:
43 
        ret
44 
 
45 
endg
46 
 
47 
 
48 
macro   LOOP_init {
49 
local   .fail
50 
 
51 
        mov     ebx, LOOPBACK_DEVICE
52 
        call    NET_add_device
53 
 
54 
        cmp     eax, -1
55 
        je      .fail
56 
 
57 
        mov     [IP_LIST], 127 + 1 shl 24
58 
        mov     [SUBNET_LIST], 255
59 
        mov     [BROADCAST_LIST], 0xffffff00 + 127
60 
 
61 
  .fail:
62 
}
63 
 
64 
;-----------------------------------------------------------------
65 
;
66 
; LOOP_input
67 
;
68 
;  IN:  [esp+4] = Pointer to buffer
69 
;       [esp+8] = size of buffer
70 
;
71 
;  OUT: /
72 
;
73 
;-----------------------------------------------------------------
74 
align 4
75 
LOOP_input:
76 
        pop     ebx
77 
        pop     eax
78 
        pop     ecx
79 
 
80 
        push    ebx
81 
        push    ecx
82 
        push    eax
83 
 
84 
        inc     [LOOPBACK_DEVICE.packets_rx]
85 
        add     dword[LOOPBACK_DEVICE.bytes_rx], ecx
86 
        adc     dword[LOOPBACK_DEVICE.bytes_rx + 4], 0
87 
 
88 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: size=%u\n", ecx
89 
        lea     edx, [eax + 4]
90 
        mov     eax, dword[eax]
91 
        mov     ebx, LOOPBACK_DEVICE
92 
 
93 
        cmp     eax, AF_INET4
94 
        je      IPv4_input
95 
 
96 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: Unknown packet type=%x\n", ax
97 
 
98 
  .dump:
99 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_input: dumping\n"
100 
        call    NET_packet_free
101 
        add     esp, 4
102 
        ret
103 
 
104 
;-----------------------------------------------------------------
105 
;
106 
; LOOP_output
107 
;
108 
; IN:
109 
;       ecx = packet size
110 
;       edi = address family
111 
;
112 
; OUT:  edi = 0 on error, pointer to buffer otherwise
113 
;       eax = buffer start
114 
;       ebx = to device structure
115 
;       ecx = unchanged (packet size of embedded data)
116 
;       edx = size of complete buffer
117 
;
118 
;-----------------------------------------------------------------
119 
align 4
120 
LOOP_output:
121 
 
122 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_output\n"
123 
 
124 
        push    ecx
125 
        push    edi
126 
 
127 
        add     ecx, 4
128 
        cmp     ecx, [LOOPBACK_DEVICE.mtu]
129 
        ja      .out_of_ram
130 
        stdcall kernel_alloc, ecx
131 
        test    eax, eax
132 
        jz      .out_of_ram
133 
        mov     edi, eax
134 
        pop     eax
135 
        stosd
136 
 
137 
        lea     eax, [edi - 4]  ; Set eax to buffer start
138 
        pop     ecx
139 
        lea     edx, [ecx + 4]  ; Set edx to complete buffer size
140 
        mov     ebx, LOOPBACK_DEVICE
141 
 
142 
        inc     [LOOPBACK_DEVICE.packets_tx]
143 
        add     dword[LOOPBACK_DEVICE.bytes_tx], ecx
144 
        adc     dword[LOOPBACK_DEVICE.bytes_tx + 4], 0
145 
 
146 
        DEBUGF  DEBUG_NETWORK_VERBOSE, "LOOP_output: ptr=%x size=%u\n", eax, edx
147 
        ret
148 
 
149 
  .out_of_ram:
150 
        DEBUGF  DEBUG_NETWORK_ERROR, "LOOP_output: out of memory\n"
151 
        add     esp, 4+4
152 
        xor     edi, edi
153 
        ret
154