Rev 1635 | Go to most recent revision | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 1635 | Rev 2434 | ||
---|---|---|---|
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
5 | ;; ;; |
6 | ;; ARP.INC ;; |
6 | ;; ARP.INC ;; |
7 | ;; ;; |
7 | ;; ;; |
8 | ;; Address Resolution Protocol ;; |
8 | ;; Address Resolution Protocol ;; |
9 | ;; ;; |
9 | ;; ;; |
10 | ;; This file contains the following: ;; |
10 | ;; This file contains the following: ;; |
11 | ;; arp_table_manager - Manages an ARPTable ;; |
11 | ;; arp_table_manager - Manages an ARPTable ;; |
12 | ;; arp_request - Sends an ARP request on the ethernet ;; |
12 | ;; arp_request - Sends an ARP request on the ethernet ;; |
13 | ;; arp_handler - Called when an ARP packet is received ;; |
13 | ;; arp_handler - Called when an ARP packet is received ;; |
14 | ;; ;; |
14 | ;; ;; |
15 | ;; Changes history: ;; |
15 | ;; Changes history: ;; |
16 | ;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net ;; |
16 | ;; 22.09.2003 - [Mike Hibbett] : mikeh@oceanfree.net ;; |
17 | ;; 11.11.2006 - [Johnny_B] and [smb] ;; |
17 | ;; 11.11.2006 - [Johnny_B] and [smb] ;; |
18 | ;; ;; |
18 | ;; ;; |
19 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
19 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
20 | 20 | ||
21 | $Revision: 983 $ |
21 | $Revision: 2434 $ |
22 | 22 | ||
23 | 23 | ||
24 | ARP_NO_ENTRY equ 0 |
24 | ARP_NO_ENTRY equ 0 |
25 | ARP_VALID_MAPPING equ 1 |
25 | ARP_VALID_MAPPING equ 1 |
26 | ARP_AWAITING_RESPONSE equ 2 |
26 | ARP_AWAITING_RESPONSE equ 2 |
27 | ARP_RESPONSE_TIMEOUT equ 3 |
27 | ARP_RESPONSE_TIMEOUT equ 3 |
28 | 28 | ||
29 | struc ARP_ENTRY ;=14 bytes |
29 | struc ARP_ENTRY ;=14 bytes |
30 | { .IP dd ? ;+00 |
30 | { .IP dd ? ;+00 |
31 | .MAC dp ? ;+04 |
31 | .MAC dp ? ;+04 |
32 | .Status dw ? ;+10 |
32 | .Status dw ? ;+10 |
33 | .TTL dw ? ;+12 : ( in seconds ) |
33 | .TTL dw ? ;+12 : ( in seconds ) |
34 | } |
34 | } |
35 | 35 | ||
36 | virtual at 0 |
36 | virtual at 0 |
37 | ARP_ENTRY ARP_ENTRY |
37 | ARP_ENTRY ARP_ENTRY |
38 | end virtual |
38 | end virtual |
39 | 39 | ||
40 | ; The TTL field is decremented every second, and is deleted when it |
40 | ; The TTL field is decremented every second, and is deleted when it |
41 | ; reaches 0. It is refreshed every time a packet is received |
41 | ; reaches 0. It is refreshed every time a packet is received |
42 | ; If the TTL field is 0xFFFF it is a static entry and is never deleted |
42 | ; If the TTL field is 0xFFFF it is a static entry and is never deleted |
43 | ; The status field can be the following values: |
43 | ; The status field can be the following values: |
44 | ; 0x0000 entry not used |
44 | ; 0x0000 entry not used |
45 | ; 0x0001 entry holds a valid mapping |
45 | ; 0x0001 entry holds a valid mapping |
46 | ; 0x0002 entry contains an IP address, awaiting ARP response |
46 | ; 0x0002 entry contains an IP address, awaiting ARP response |
47 | ; 0x0003 No response received to ARP request. |
47 | ; 0x0003 No response received to ARP request. |
48 | ; The last status value is provided to allow the network layer to delete |
48 | ; The last status value is provided to allow the network layer to delete |
49 | ; a packet that is queued awaiting an ARP response |
49 | ; a packet that is queued awaiting an ARP response |
50 | 50 | ||
51 | 51 | ||
52 | ; The follow is the ARP Table. |
52 | ; The follow is the ARP Table. |
53 | ; This table must be manually updated and the kernel recompilied if |
53 | ; This table must be manually updated and the kernel recompilied if |
54 | ; changes are made to it. |
54 | ; changes are made to it. |
55 | ; Empty entries are filled with zeros |
55 | ; Empty entries are filled with zeros |
56 | 56 | ||
57 | ARP_ENTRY_SIZE equ 14 ; Number of bytes per entry |
57 | ARP_ENTRY_SIZE equ 14 ; Number of bytes per entry |
58 | ARP_TABLE_SIZE equ 20 ; Size of table |
58 | ARP_TABLE_SIZE equ 20 ; Size of table |
59 | ARP_TABLE_ENTRIES equ 0 ; Number of static entries in the table |
59 | ARP_TABLE_ENTRIES equ 0 ; Number of static entries in the table |
60 | 60 | ||
61 | ;TO ADD A STATIC ENTRY, DONT FORGET, PUT "ARPTable" from "uglobal" to "iglobal"!!! |
61 | ;TO ADD A STATIC ENTRY, DONT FORGET, PUT "ARPTable" from "uglobal" to "iglobal"!!! |
62 | ;AND ALSO - IP and MAC have net byte-order, BUT STATUS AND TTL HAVE A MIRROR BYTE-ORDER!!! |
62 | ;AND ALSO - IP and MAC have net byte-order, BUT STATUS AND TTL HAVE A MIRROR BYTE-ORDER!!! |
63 | uglobal |
63 | uglobal |
64 | ARPTable: |
64 | ARPTable: |
65 | ;example, static entry -> db 11,22,33,44, 0x11,0x22,0x33,0x44,0x55,0x66, 0x01,0x00, 0xFF,0xFF |
65 | ;example, static entry -> db 11,22,33,44, 0x11,0x22,0x33,0x44,0x55,0x66, 0x01,0x00, 0xFF,0xFF |
66 | times ( ARP_TABLE_SIZE - ARP_TABLE_ENTRIES ) * ARP_ENTRY_SIZE db 0 |
66 | times ( ARP_TABLE_SIZE - ARP_TABLE_ENTRIES ) * ARP_ENTRY_SIZE db 0 |
67 | endg |
67 | endg |
68 | 68 | ||
69 | iglobal |
69 | iglobal |
- | 70 | NumARP: |
|
70 | NumARP: dd ARP_TABLE_ENTRIES |
71 | dd ARP_TABLE_ENTRIES |
71 | ARPTable_ptr dd ARPTable ;pointer to ARPTable |
72 | ARPTable_ptr dd ARPTable ;pointer to ARPTable |
72 | endg |
73 | endg |
73 | 74 | ||
74 | ARP_REQ_OPCODE equ 0x0100 ;request |
75 | ARP_REQ_OPCODE equ 0x0100 ;request |
75 | ARP_REP_OPCODE equ 0x0200 ;reply |
76 | ARP_REP_OPCODE equ 0x0200 ;reply |
76 | 77 | ||
77 | struc ARP_PACKET |
78 | struc ARP_PACKET |
78 | { .HardwareType dw ? ;+00 |
79 | { .HardwareType dw ? ;+00 |
79 | .ProtocolType dw ? ;+02 |
80 | .ProtocolType dw ? ;+02 |
80 | .HardwareSize db ? ;+04 |
81 | .HardwareSize db ? ;+04 |
81 | .ProtocolSize db ? ;+05 |
82 | .ProtocolSize db ? ;+05 |
82 | .Opcode dw ? ;+06 |
83 | .Opcode dw ? ;+06 |
83 | .SenderMAC dp ? ;+08 |
84 | .SenderMAC dp ? ;+08 |
84 | .SenderIP dd ? ;+14 |
85 | .SenderIP dd ? ;+14 |
85 | .TargetMAC dp ? ;+18 |
86 | .TargetMAC dp ? ;+18 |
86 | .TargetIP dd ? ;+24 |
87 | .TargetIP dd ? ;+24 |
87 | } |
88 | } |
88 | 89 | ||
89 | virtual at 0 |
90 | virtual at 0 |
90 | ARP_PACKET ARP_PACKET |
91 | ARP_PACKET ARP_PACKET |
91 | end virtual |
92 | end virtual |
92 | 93 | ||
93 | 94 | ||
94 | 95 | ||
95 | ;*************************************************************************** |
96 | ;*************************************************************************** |
96 | ; Function |
97 | ; Function |
97 | ; arp_table_manager [by Johnny_B] |
98 | ; arp_table_manager [by Johnny_B] |
98 | ; |
99 | ; |
99 | ; Description |
100 | ; Description |
100 | ; Does a most required operations with ARP-table |
101 | ; Does a most required operations with ARP-table |
101 | ; IN: |
102 | ; IN: |
102 | ; Operation: see Opcode's constants below |
103 | ; Operation: see Opcode's constants below |
103 | ; Index: Index of entry in the ARP-table |
104 | ; Index: Index of entry in the ARP-table |
104 | ; Extra: Extra parameter for some Opcodes |
105 | ; Extra: Extra parameter for some Opcodes |
105 | ; OUT: |
106 | ; OUT: |
106 | ; EAX = Returned value depends on opcodes, more detailed see below |
107 | ; EAX = Returned value depends on opcodes, more detailed see below |
107 | ; |
108 | ; |
108 | ;*************************************************************************** |
109 | ;*************************************************************************** |
109 | ;Opcode's constants |
110 | ;Opcode's constants |
110 | ARP_TABLE_ADD equ 1 |
111 | ARP_TABLE_ADD equ 1 |
111 | ARP_TABLE_DEL equ 2 |
112 | ARP_TABLE_DEL equ 2 |
112 | ARP_TABLE_GET equ 3 |
113 | ARP_TABLE_GET equ 3 |
113 | ARP_TABLE_GET_ENTRIES_NUMBER equ 4 |
114 | ARP_TABLE_GET_ENTRIES_NUMBER equ 4 |
114 | ARP_TABLE_IP_TO_MAC equ 5 |
115 | ARP_TABLE_IP_TO_MAC equ 5 |
115 | ARP_TABLE_TIMER equ 6 |
116 | ARP_TABLE_TIMER equ 6 |
116 | 117 | ||
117 | ;Index's constants |
118 | ;Index's constants |
118 | EXTRA_IS_ARP_PACKET_PTR equ 0 ;if Extra contain pointer to ARP_PACKET |
119 | EXTRA_IS_ARP_PACKET_PTR equ 0 ;if Extra contain pointer to ARP_PACKET |
119 | EXTRA_IS_ARP_ENTRY_PTR equ -1 ;if Extra contain pointer to ARP_ENTRY |
120 | EXTRA_IS_ARP_ENTRY_PTR equ -1 ;if Extra contain pointer to ARP_ENTRY |
120 | 121 | ||
121 | align 4 |
122 | align 4 |
122 | proc arp_table_manager stdcall uses ebx esi edi ecx edx,\ |
123 | proc arp_table_manager stdcall uses ebx esi edi ecx edx,\ |
123 | Opcode:DWORD,Index:DWORD,Extra:DWORD |
124 | Opcode:DWORD,Index:DWORD,Extra:DWORD |
124 | 125 | ||
125 | mov ebx, dword[ARPTable_ptr] ;ARPTable base |
126 | mov ebx, dword[ARPTable_ptr];ARPTable base |
126 | mov ecx, dword[NumARP] ;ARP-entries counter |
127 | mov ecx, dword[NumARP] ;ARP-entries counter |
127 | 128 | ||
128 | mov eax, dword[Opcode] |
129 | mov eax, dword[Opcode] |
129 | cmp eax, ARP_TABLE_TIMER |
130 | cmp eax, ARP_TABLE_TIMER |
130 | je .timer |
131 | je .timer |
131 | cmp eax, ARP_TABLE_ADD |
132 | cmp eax, ARP_TABLE_ADD |
132 | je .add |
133 | je .add |
133 | cmp eax, ARP_TABLE_DEL |
134 | cmp eax, ARP_TABLE_DEL |
134 | je .del |
135 | je .del |
135 | cmp eax, ARP_TABLE_GET |
136 | cmp eax, ARP_TABLE_GET |
136 | je .get |
137 | je .get |
137 | cmp eax, ARP_TABLE_IP_TO_MAC |
138 | cmp eax, ARP_TABLE_IP_TO_MAC |
138 | je .ip_to_mac |
139 | je .ip_to_mac |
139 | cmp eax, ARP_TABLE_GET_ENTRIES_NUMBER |
140 | cmp eax, ARP_TABLE_GET_ENTRIES_NUMBER |
140 | je .get_entries_number |
141 | je .get_entries_number |
141 | jmp .exit ;if unknown opcode |
142 | jmp .exit ;if unknown opcode |
142 | 143 | ||
143 | 144 | ||
144 | ;;BEGIN TIMER |
145 | ;;BEGIN TIMER |
145 | ;;Description: it must be callback every second. It is responsible for removing expired routes. |
146 | ;;Description: it must be callback every second. It is responsible for removing expired routes. |
146 | ;;IN: Operation: ARP_TABLE_TIMER |
147 | ;;IN: Operation: ARP_TABLE_TIMER |
147 | ;; Index: must be zero |
148 | ;; Index: must be zero |
148 | ;; Extra: must be zero |
149 | ;; Extra: must be zero |
149 | ;;OUT: |
150 | ;;OUT: |
150 | ;; EAX=not defined |
151 | ;; EAX=not defined |
151 | ;; |
152 | ;; |
152 | .timer: |
153 | .timer: |
153 | test ecx, ecx |
154 | test ecx, ecx |
154 | jz .exit ;if NumARP=0 nothing to do |
155 | jz .exit;if NumARP=0 nothing to do |
155 | sub ecx, ARP_TABLE_ENTRIES ;ecx=dynamic entries number |
156 | sub ecx, ARP_TABLE_ENTRIES;ecx=dynamic entries number |
156 | jz .exit ;if NumARP=number of static entries then exit |
157 | jz .exit;if NumARP=number of static entries then exit |
157 | 158 | ||
158 | add ebx, ARP_TABLE_ENTRIES*ARP_ENTRY_SIZE ;ebx=dynamic entries base |
159 | add ebx, ARP_TABLE_ENTRIES*ARP_ENTRY_SIZE;ebx=dynamic entries base |
159 | 160 | ||
160 | .timer_loop: |
161 | .timer_loop: |
161 | movsx esi, word [ebx + ARP_ENTRY.TTL] |
162 | movsx esi, word [ebx + ARP_ENTRY.TTL] |
162 | cmp esi, 0xFFFFFFFF |
163 | cmp esi, 0xFFFFFFFF |
163 | je .timer_loop_end ;if TTL==0xFFFF then it's static entry |
164 | je .timer_loop_end;if TTL==0xFFFF then it's static entry |
164 | 165 | ||
165 | test esi, esi |
166 | test esi, esi |
166 | jnz .timer_loop_end_with_dec ;if TTL!=0 |
167 | jnz .timer_loop_end_with_dec;if TTL!=0 |
167 | 168 | ||
168 | ; Ok, TTL is 0 |
169 | ; Ok, TTL is 0 |
169 | ;if Status==AWAITING_RESPONSE and TTL==0 |
170 | ;if Status==AWAITING_RESPONSE and TTL==0 |
170 | ;then we have to change it to ARP_RESPONSE_TIMEOUT |
171 | ;then we have to change it to ARP_RESPONSE_TIMEOUT |
171 | cmp word [ebx + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE |
172 | cmp word [ebx + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE |
172 | jne @f |
173 | jne @f |
173 | 174 | ||
174 | mov word [ebx + ARP_ENTRY.Status], ARP_RESPONSE_TIMEOUT |
175 | mov word [ebx + ARP_ENTRY.Status], ARP_RESPONSE_TIMEOUT |
175 | mov word [ebx + ARP_ENTRY.TTL], word 0x000A ;10 sec |
176 | mov word [ebx + ARP_ENTRY.TTL], word 0x000A;10 sec |
176 | jmp .timer_loop_end |
177 | jmp .timer_loop_end |
177 | 178 | ||
178 | @@: |
179 | @@: |
179 | ;if TTL==0 and Status==VALID_MAPPING, we have to delete it |
180 | ;if TTL==0 and Status==VALID_MAPPING, we have to delete it |
180 | ;if TTL==0 and Status==RESPONSE_TIMEOUT, delete too |
181 | ;if TTL==0 and Status==RESPONSE_TIMEOUT, delete too |
181 | mov esi, dword[NumARP] |
182 | mov esi, dword[NumARP] |
182 | sub esi, ecx ;esi=index of entry, will be deleted |
183 | sub esi, ecx ;esi=index of entry, will be deleted |
183 | stdcall arp_table_manager,ARP_TABLE_DEL,esi,0 ;opcode,index,extra |
184 | stdcall arp_table_manager, ARP_TABLE_DEL, esi, 0;opcode,index,extra |
184 | jmp .timer_loop_end |
185 | jmp .timer_loop_end |
185 | 186 | ||
186 | 187 | ||
187 | .timer_loop_end_with_dec: |
188 | .timer_loop_end_with_dec: |
188 | dec word [ebx + ARP_ENTRY.TTL] ;decrease TTL |
189 | dec word [ebx + ARP_ENTRY.TTL];decrease TTL |
189 | .timer_loop_end: |
190 | .timer_loop_end: |
190 | add ebx, ARP_ENTRY_SIZE |
191 | add ebx, ARP_ENTRY_SIZE |
191 | loop .timer_loop |
192 | loop .timer_loop |
192 | 193 | ||
193 | jmp .exit |
194 | jmp .exit |
194 | ;;END TIMER |
195 | ;;END TIMER |
195 | 196 | ||
196 | ;;BEGIN ADD |
197 | ;;BEGIN ADD |
197 | ;;Description: it adds an entry in the table. If ARP-table already |
198 | ;;Description: it adds an entry in the table. If ARP-table already |
198 | ;; contains same IP, it will be updated. |
199 | ;; contains same IP, it will be updated. |
199 | ;;IN: Operation: ARP_TABLE_ADD |
200 | ;;IN: Operation: ARP_TABLE_ADD |
200 | ;; Index: specifies what contains Extra-parameter |
201 | ;; Index: specifies what contains Extra-parameter |
201 | ;; Extra: if Index==EXTRA_IS_ARP_PACKET_PTR, |
202 | ;; Extra: if Index==EXTRA_IS_ARP_PACKET_PTR, |
202 | ;; then Extra contains pointer to ARP_PACKET, |
203 | ;; then Extra contains pointer to ARP_PACKET, |
203 | ;; otherwise Extra contains pointer to ARP_ENTRY |
204 | ;; otherwise Extra contains pointer to ARP_ENTRY |
204 | ;;OUT: |
205 | ;;OUT: |
205 | ;; EAX=index of entry, that has been added |
206 | ;; EAX=index of entry, that has been added |
206 | ;; |
207 | ;; |
207 | .add: |
208 | .add: |
208 | 209 | ||
209 | sub esp, ARP_ENTRY_SIZE ;Allocate ARP_ENTRY_SIZE byte in stack |
210 | sub esp, ARP_ENTRY_SIZE;Allocate ARP_ENTRY_SIZE byte in stack |
210 | 211 | ||
211 | mov esi, [Extra] ;pointer |
212 | mov esi, [Extra];pointer |
212 | mov edi, [Index] ;opcode |
213 | mov edi, [Index];opcode |
213 | 214 | ||
214 | cmp edi, EXTRA_IS_ARP_PACKET_PTR |
215 | cmp edi, EXTRA_IS_ARP_PACKET_PTR |
215 | je .arp_packet_to_entry ;if Extra contain ptr to ARP_PACKET and we have to form arp-entry |
216 | je .arp_packet_to_entry;if Extra contain ptr to ARP_PACKET and we have to form arp-entry |
216 | ;else it contain ptr to arp-entry |
217 | ;else it contain ptr to arp-entry |
217 | 218 | ||
218 | cld |
219 | cld |
219 | ; esi already has been loaded |
220 | ; esi already has been loaded |
220 | mov edi, esp ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add) |
221 | mov edi, esp ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add) |
221 | mov ecx,ARP_ENTRY_SIZE/2 ;ARP_ENTRY_SIZE must be even number!!! |
222 | mov ecx, ARP_ENTRY_SIZE/2;ARP_ENTRY_SIZE must be even number!!! |
222 | rep movsw ;copy |
223 | rep movsw ;copy |
223 | jmp .search |
224 | jmp .search |
224 | 225 | ||
225 | .arp_packet_to_entry: |
226 | .arp_packet_to_entry: |
226 | mov edx, dword[esi + ARP_PACKET.SenderIP] ;esi=base of ARP_PACKET |
227 | mov edx, dword[esi + ARP_PACKET.SenderIP];esi=base of ARP_PACKET |
227 | mov [esp + ARP_ENTRY.IP], edx |
228 | mov [esp + ARP_ENTRY.IP], edx |
228 | 229 | ||
229 | cld |
230 | cld |
230 | lea esi, [esi + ARP_PACKET.SenderMAC] |
231 | lea esi, [esi + ARP_PACKET.SenderMAC] |
231 | lea edi, [esp + ARP_ENTRY.MAC] |
232 | lea edi, [esp + ARP_ENTRY.MAC] |
232 | movsd |
233 | movsd |
233 | movsw |
234 | movsw |
234 | mov word[esp + ARP_ENTRY.Status], ARP_VALID_MAPPING ; specify the type - a valid entry |
235 | mov word[esp + ARP_ENTRY.Status], ARP_VALID_MAPPING; specify the type - a valid entry |
235 | mov word[esp + ARP_ENTRY.TTL], 0x0E10 ; = 1 hour |
236 | mov word[esp + ARP_ENTRY.TTL], 0x0E10; = 1 hour |
236 | 237 | ||
237 | .search: |
238 | .search: |
238 | mov edx, dword[esp + ARP_ENTRY.IP] ;edx=IP-address, which we'll search |
239 | mov edx, dword[esp + ARP_ENTRY.IP];edx=IP-address, which we'll search |
239 | mov ecx, dword[NumARP] ;ecx=ARP-entries counter |
240 | mov ecx, dword[NumARP] ;ecx=ARP-entries counter |
240 | jecxz .add_to_end ;if ARP-entries number == 0 |
241 | jecxz .add_to_end ;if ARP-entries number == 0 |
241 | imul eax, ecx, ARP_ENTRY_SIZE ;eax=current table size(in bytes) |
242 | imul eax, ecx, ARP_ENTRY_SIZE ;eax=current table size(in bytes) |
242 | @@: |
243 | @@: |
243 | sub eax, ARP_ENTRY_SIZE |
244 | sub eax, ARP_ENTRY_SIZE |
244 | cmp dword[ebx + eax + ARP_ENTRY.IP], edx |
245 | cmp dword[ebx + eax + ARP_ENTRY.IP], edx |
245 | loopnz @b |
246 | loopnz @b |
246 | jz .replace ; found, replace existing entry, ptr to it is in eax |
247 | jz .replace ; found, replace existing entry, ptr to it is in eax |
247 | 248 | ||
248 | .add_to_end: |
249 | .add_to_end: |
249 | ;else add to end |
250 | ;else add to end |
250 | or eax,-1 ;set eax=0xFFFFFFFF if adding is impossible |
251 | or eax, -1;set eax=0xFFFFFFFF if adding is impossible |
251 | mov ecx, dword[NumARP] |
252 | mov ecx, dword[NumARP] |
252 | cmp ecx, ARP_TABLE_SIZE |
253 | cmp ecx, ARP_TABLE_SIZE |
253 | je .add_exit ;if arp-entries number is equal to arp-table maxsize |
254 | je .add_exit;if arp-entries number is equal to arp-table maxsize |
254 | 255 | ||
255 | imul eax, dword[NumARP], ARP_ENTRY_SIZE ;eax=ptr to end of ARPTable |
256 | imul eax, dword[NumARP], ARP_ENTRY_SIZE;eax=ptr to end of ARPTable |
256 | inc dword [NumARP] ;increase ARP-entries counter |
257 | inc dword [NumARP];increase ARP-entries counter |
257 | 258 | ||
258 | .replace: |
259 | .replace: |
259 | cld |
260 | cld |
260 | mov esi, esp ;esp=base of ARP-entry, that will be added |
261 | mov esi, esp ;esp=base of ARP-entry, that will be added |
261 | lea edi, [ebx + eax] ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add) |
262 | lea edi, [ebx + eax] ;ebx + eax=ARPTable_base + ARP-entry_base(where we will add) |
262 | mov ecx,ARP_ENTRY_SIZE/2 ;ARP_ENTRY_SIZE must be even number!!! |
263 | mov ecx, ARP_ENTRY_SIZE/2;ARP_ENTRY_SIZE must be even number!!! |
263 | rep movsw |
264 | rep movsw |
264 | 265 | ||
265 | mov ecx, ARP_ENTRY_SIZE |
266 | mov ecx, ARP_ENTRY_SIZE |
266 | xor edx, edx ;"div" takes operand from EDX:EAX |
267 | xor edx, edx;"div" takes operand from EDX:EAX |
267 | div ecx ;eax=index of entry, which has been added |
268 | div ecx ;eax=index of entry, which has been added |
268 | 269 | ||
269 | .add_exit: |
270 | .add_exit: |
270 | add esp, ARP_ENTRY_SIZE ;free stack |
271 | add esp, ARP_ENTRY_SIZE;free stack |
271 | jmp .exit |
272 | jmp .exit |
272 | ;;END ADD |
273 | ;;END ADD |
273 | 274 | ||
274 | ;;BEGIN DEL |
275 | ;;BEGIN DEL |
275 | ;;Description: it deletes an entry in the table. |
276 | ;;Description: it deletes an entry in the table. |
276 | ;;IN: Operation: ARP_TABLE_DEL |
277 | ;;IN: Operation: ARP_TABLE_DEL |
277 | ;; Index: index of entry, that should be deleted |
278 | ;; Index: index of entry, that should be deleted |
278 | ;; Extra: must be zero |
279 | ;; Extra: must be zero |
279 | ;;OUT: |
280 | ;;OUT: |
280 | ;; EAX=not defined |
281 | ;; EAX=not defined |
281 | ;; |
282 | ;; |
282 | .del: |
283 | .del: |
283 | mov esi, [Index] |
284 | mov esi, [Index] |
284 | imul esi, ARP_ENTRY_SIZE |
285 | imul esi, ARP_ENTRY_SIZE |
285 | 286 | ||
286 | mov ecx, (ARP_TABLE_SIZE - 1) * ARP_ENTRY_SIZE |
287 | mov ecx, (ARP_TABLE_SIZE - 1) * ARP_ENTRY_SIZE |
287 | sub ecx, esi |
288 | sub ecx, esi |
288 | 289 | ||
289 | lea edi, [ebx + esi] ;edi=ptr to entry that should be deleted |
290 | lea edi, [ebx + esi] ;edi=ptr to entry that should be deleted |
290 | lea esi, [edi + ARP_ENTRY_SIZE] ;esi=ptr to next entry |
291 | lea esi, [edi + ARP_ENTRY_SIZE];esi=ptr to next entry |
291 | 292 | ||
292 | shr ecx,1 ;ecx/2 => ARP_ENTRY_SIZE MUST BE EVEN NUMBER! |
293 | shr ecx, 1 ;ecx/2 => ARP_ENTRY_SIZE MUST BE EVEN NUMBER! |
293 | cld |
294 | cld |
294 | rep movsw |
295 | rep movsw |
295 | 296 | ||
296 | dec dword[NumARP] ;decrease arp-entries counter |
297 | dec dword[NumARP];decrease arp-entries counter |
297 | jmp .exit |
298 | jmp .exit |
298 | ;;END DEL |
299 | ;;END DEL |
299 | 300 | ||
300 | ;;BEGIN GET |
301 | ;;BEGIN GET |
301 | ;;Description: it reads an entry of table into buffer. |
302 | ;;Description: it reads an entry of table into buffer. |
302 | ;;IN: Operation: ARP_TABLE_GET |
303 | ;;IN: Operation: ARP_TABLE_GET |
303 | ;; Index: index of entry, that should be read |
304 | ;; Index: index of entry, that should be read |
304 | ;; Extra: pointer to buffer for reading(size must be equal to ARP_ENTRY_SIZE) |
305 | ;; Extra: pointer to buffer for reading(size must be equal to ARP_ENTRY_SIZE) |
305 | ;;OUT: |
306 | ;;OUT: |
306 | ;; EAX=not defined |
307 | ;; EAX=not defined |
307 | ;; |
308 | ;; |
308 | .get: |
309 | .get: |
309 | mov esi, [Index] |
310 | mov esi, [Index] |
310 | imul esi, ARP_ENTRY_SIZE ;esi=ptr to required ARP_ENTRY |
311 | imul esi, ARP_ENTRY_SIZE;esi=ptr to required ARP_ENTRY |
311 | mov edi, [Extra] ;edi=buffer for reading |
312 | mov edi, [Extra] ;edi=buffer for reading |
312 | mov ecx, ARP_ENTRY_SIZE/2 ; must be even number!!! |
313 | mov ecx, ARP_ENTRY_SIZE/2; must be even number!!! |
313 | cld |
314 | cld |
314 | rep movsw |
315 | rep movsw |
315 | jmp .exit |
316 | jmp .exit |
316 | ;;END GET |
317 | ;;END GET |
317 | 318 | ||
318 | ;;BEGIN IP_TO_MAC |
319 | ;;BEGIN IP_TO_MAC |
319 | ;;Description: it gets an IP from Index, scans each entry in the table and writes |
320 | ;;Description: it gets an IP from Index, scans each entry in the table and writes |
320 | ;; MAC, that relates to specified IP, into buffer specified in Extra. |
321 | ;; MAC, that relates to specified IP, into buffer specified in Extra. |
321 | ;; And if it cannot find an IP-address in the table, it does an ARP-request of that. |
322 | ;; And if it cannot find an IP-address in the table, it does an ARP-request of that. |
322 | ;;IN: Operation: ARP_TABLE_IP_TO_MAC |
323 | ;;IN: Operation: ARP_TABLE_IP_TO_MAC |
323 | ;; Index: IP that should be transformed into MAC |
324 | ;; Index: IP that should be transformed into MAC |
324 | ;; Extra: pointer to buffer where will be written the MAC-address. |
325 | ;; Extra: pointer to buffer where will be written the MAC-address. |
325 | ;;OUT: |
326 | ;;OUT: |
326 | ;; EAX=ARP table entry status code. |
327 | ;; EAX=ARP table entry status code. |
327 | ;; If EAX==ARP_NO_ENTRY, IP isn't found in the table and we have sent the request. |
328 | ;; If EAX==ARP_NO_ENTRY, IP isn't found in the table and we have sent the request. |
328 | ;; If EAX==ARP_AWAITING_RESPONSE, we wait the response from remote system. |
329 | ;; If EAX==ARP_AWAITING_RESPONSE, we wait the response from remote system. |
329 | ;; If EAX==ARP_RESPONSE_TIMEOUT, remote system not responds too long. |
330 | ;; If EAX==ARP_RESPONSE_TIMEOUT, remote system not responds too long. |
330 | ;; If EAX==ARP_VALID_MAPPING, all is ok, we've got a true MAC. |
331 | ;; If EAX==ARP_VALID_MAPPING, all is ok, we've got a true MAC. |
331 | ;; |
332 | ;; |
332 | ;; If MAC will equal to a zero, in the buffer. It means, that IP-address was not yet |
333 | ;; If MAC will equal to a zero, in the buffer. It means, that IP-address was not yet |
333 | ;; resolved, or that doesn't exist. I recommend you, to do at most 3-5 calls of this |
334 | ;; resolved, or that doesn't exist. I recommend you, to do at most 3-5 calls of this |
334 | ;; function with 1sec delay. sure, only if it not return a valid MAC after a first call. |
335 | ;; function with 1sec delay. sure, only if it not return a valid MAC after a first call. |
335 | ;; |
336 | ;; |
336 | .ip_to_mac: |
337 | .ip_to_mac: |
337 | 338 | ||
338 | xor eax, eax |
339 | xor eax, eax |
339 | mov edi, dword[Extra] |
340 | mov edi, dword[Extra] |
340 | cld |
341 | cld |
341 | stosd |
342 | stosd |
342 | stosw |
343 | stosw |
343 | 344 | ||
344 | 345 | ||
345 | ; first, check destination IP to see if it is on 'this' network. |
346 | ; first, check destination IP to see if it is on 'this' network. |
346 | ; The test is: |
347 | ; The test is: |
347 | ; if ( destIP & subnet_mask == stack_ip & subnet_mask ) |
348 | ; if ( destIP & subnet_mask == stack_ip & subnet_mask ) |
348 | ; destination is local |
349 | ; destination is local |
349 | ; else |
350 | ; else |
350 | ; destination is remote, so pass to gateway |
351 | ; destination is remote, so pass to gateway |
351 | 352 | ||
352 | mov eax, [Index] ;eax=required IP |
353 | mov eax, [Index] ;eax=required IP |
353 | mov esi, eax |
354 | mov esi, eax |
354 | and esi, [subnet_mask] |
355 | and esi, [subnet_mask] |
355 | mov ecx, [stack_ip] |
356 | mov ecx, [stack_ip] |
356 | and ecx, [subnet_mask] |
357 | and ecx, [subnet_mask] |
357 | cmp esi, ecx |
358 | cmp esi, ecx |
358 | je @f ;if we and target IP are located in the same network |
359 | je @f ;if we and target IP are located in the same network |
359 | mov eax, [gateway_ip] |
360 | mov eax, [gateway_ip] |
360 | mov [Index], eax |
361 | mov [Index], eax |
361 | @@: |
362 | @@: |
362 | 363 | ||
363 | cmp dword[NumARP], 0 |
364 | cmp dword[NumARP], 0 |
364 | je .ip_to_mac_send_request ;if ARP-table not contain an entries, we have to request IP. |
365 | je .ip_to_mac_send_request;if ARP-table not contain an entries, we have to request IP. |
365 | ;EAX will be containing a zero, it's equal to ARP_NO_ENTRY |
366 | ;EAX will be containing a zero, it's equal to ARP_NO_ENTRY |
366 | 367 | ||
367 | mov ecx, dword[NumARP] |
368 | mov ecx, dword[NumARP] |
368 | imul esi, ecx, ARP_ENTRY_SIZE ;esi=current ARP-table size |
369 | imul esi, ecx, ARP_ENTRY_SIZE;esi=current ARP-table size |
369 | 370 | ||
370 | @@: |
371 | @@: |
371 | sub esi, ARP_ENTRY_SIZE |
372 | sub esi, ARP_ENTRY_SIZE |
372 | cmp [ebx + esi], eax ; ebx=ARPTable base |
373 | cmp [ebx + esi], eax ; ebx=ARPTable base |
373 | loopnz @b ; Return back if non match |
374 | loopnz @b ; Return back if non match |
374 | jnz .ip_to_mac_send_request ; and request IP->MAC if none found in the table |
375 | jnz .ip_to_mac_send_request; and request IP->MAC if none found in the table |
375 | 376 | ||
376 | ; Return the entry status in eax |
377 | ; Return the entry status in eax |
377 | movzx eax, word[ebx + esi + ARP_ENTRY.Status] |
378 | movzx eax, word[ebx + esi + ARP_ENTRY.Status] |
378 | 379 | ||
379 | ; esi holds index |
380 | ; esi holds index |
380 | cld |
381 | cld |
381 | lea esi, [ebx + esi + ARP_ENTRY.MAC] |
382 | lea esi, [ebx + esi + ARP_ENTRY.MAC] |
382 | mov edi, [Extra] ;edi=ptr to buffer for write MAC |
383 | mov edi, [Extra];edi=ptr to buffer for write MAC |
383 | movsd |
384 | movsd |
384 | movsw |
385 | movsw |
385 | jmp .exit |
386 | jmp .exit |
386 | 387 | ||
387 | .ip_to_mac_send_request: |
388 | .ip_to_mac_send_request: |
388 | stdcall arp_request,[Index],stack_ip,node_addr ;TargetIP,SenderIP_ptr,SenderMAC_ptr |
389 | stdcall arp_request, [Index], stack_ip, node_addr;TargetIP,SenderIP_ptr,SenderMAC_ptr |
389 | mov eax, ARP_NO_ENTRY |
390 | mov eax, ARP_NO_ENTRY |
390 | jmp .exit |
391 | jmp .exit |
391 | 392 | ||
392 | ;;END IP_TO_MAC |
393 | ;;END IP_TO_MAC |
393 | 394 | ||
394 | ;;BEGIN GET_ENTRIES_NUMBER |
395 | ;;BEGIN GET_ENTRIES_NUMBER |
395 | ;;Description: returns an ARP-entries number in the ARPTable |
396 | ;;Description: returns an ARP-entries number in the ARPTable |
396 | ;;IN: Operation: ARP_TABLE_GET_ENTRIES_NUMBER |
397 | ;;IN: Operation: ARP_TABLE_GET_ENTRIES_NUMBER |
397 | ;; Index: must be zero |
398 | ;; Index: must be zero |
398 | ;; Extra: must be zero |
399 | ;; Extra: must be zero |
399 | ;;OUT: |
400 | ;;OUT: |
400 | ;; EAX=ARP-entries number in the ARPTable |
401 | ;; EAX=ARP-entries number in the ARPTable |
401 | .get_entries_number: |
402 | .get_entries_number: |
402 | mov eax, dword[NumARP] |
403 | mov eax, dword[NumARP] |
403 | jmp .exit |
404 | jmp .exit |
404 | ;;END GET_ENTRIES_NUMBER |
405 | ;;END GET_ENTRIES_NUMBER |
405 | 406 | ||
406 | .exit: |
407 | .exit: |
407 | ret |
408 | ret |
408 | endp |
409 | endp |
409 | 410 | ||
410 | 411 | ||
411 | ;*************************************************************************** |
412 | ;*************************************************************************** |
412 | ; Function |
413 | ; Function |
413 | ; arp_handler |
414 | ; arp_handler |
414 | ; |
415 | ; |
415 | ; Description |
416 | ; Description |
416 | ; Called when an ARP packet is received on the ethernet |
417 | ; Called when an ARP packet is received on the ethernet |
417 | ; Header + Data is in Ether_buffer[] |
418 | ; Header + Data is in Ether_buffer[] |
418 | ; It looks to see if the packet is a request to resolve this Hosts |
419 | ; It looks to see if the packet is a request to resolve this Hosts |
419 | ; IP address. If it is, send the ARP reply packet. |
420 | ; IP address. If it is, send the ARP reply packet. |
420 | ; This Hosts IP address is in dword [stack_ip] ( in network format ) |
421 | ; This Hosts IP address is in dword [stack_ip] ( in network format ) |
421 | ; This Hosts MAC address is in node_addr[6] |
422 | ; This Hosts MAC address is in node_addr[6] |
422 | ; All registers may be destroyed |
423 | ; All registers may be destroyed |
423 | ; |
424 | ; |
424 | ;*************************************************************************** |
425 | ;*************************************************************************** |
425 | arp_handler: |
426 | arp_handler: |
426 | ; Is this a REQUEST? |
427 | ; Is this a REQUEST? |
427 | ; Is this a request for My Host IP |
428 | ; Is this a request for My Host IP |
428 | ; Yes - So construct a response message. |
429 | ; Yes - So construct a response message. |
429 | ; Send this message to the ethernet card for transmission |
430 | ; Send this message to the ethernet card for transmission |
430 | 431 | ||
431 | stdcall arp_table_manager,ARP_TABLE_ADD,EXTRA_IS_ARP_PACKET_PTR,ETH_FRAME.Data + ARP_PACKET |
432 | stdcall arp_table_manager, ARP_TABLE_ADD, EXTRA_IS_ARP_PACKET_PTR, ETH_FRAME.Data + ARP_PACKET |
432 | 433 | ||
433 | inc dword[arp_rx_count] ;increase ARP-packets counter |
434 | inc dword[arp_rx_count];increase ARP-packets counter |
434 | 435 | ||
435 | cmp word[ETH_FRAME.Data + ARP_PACKET.Opcode], ARP_REQ_OPCODE ; Is this a request packet? |
436 | cmp word[ETH_FRAME.Data + ARP_PACKET.Opcode], ARP_REQ_OPCODE; Is this a request packet? |
436 | jne .exit ; No - so exit |
437 | jne .exit ; No - so exit |
437 | 438 | ||
438 | mov eax, [stack_ip] |
439 | mov eax, [stack_ip] |
439 | cmp eax, dword[ETH_FRAME.Data + ARP_PACKET.TargetIP] ; Is it looking for my IP address? |
440 | cmp eax, dword[ETH_FRAME.Data + ARP_PACKET.TargetIP] ; Is it looking for my IP address? |
440 | jne .exit ; No - so quit now |
441 | jne .exit ; No - so quit now |
441 | 442 | ||
442 | ; OK, it is a request for my MAC address. Build the frame and send it |
443 | ; OK, it is a request for my MAC address. Build the frame and send it |
443 | ; We can reuse the packet. |
444 | ; We can reuse the packet. |
444 | 445 | ||
445 | mov word[ETH_FRAME.Data + ARP_PACKET.Opcode], ARP_REP_OPCODE |
446 | mov word[ETH_FRAME.Data + ARP_PACKET.Opcode], ARP_REP_OPCODE |
446 | 447 | ||
447 | cld |
448 | cld |
448 | mov esi, ETH_FRAME.Data + ARP_PACKET.SenderMAC |
449 | mov esi, ETH_FRAME.Data + ARP_PACKET.SenderMAC |
449 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetMAC |
450 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetMAC |
450 | movsd |
451 | movsd |
451 | movsw |
452 | movsw |
452 | 453 | ||
453 | mov esi, ETH_FRAME.Data + ARP_PACKET.SenderIP |
454 | mov esi, ETH_FRAME.Data + ARP_PACKET.SenderIP |
454 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetIP |
455 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetIP |
455 | movsd |
456 | movsd |
456 | 457 | ||
457 | mov esi, node_addr |
458 | mov esi, node_addr |
458 | mov edi, ETH_FRAME.Data + ARP_PACKET.SenderMAC |
459 | mov edi, ETH_FRAME.Data + ARP_PACKET.SenderMAC |
459 | movsd |
460 | movsd |
460 | movsw |
461 | movsw |
461 | 462 | ||
462 | mov esi, stack_ip |
463 | mov esi, stack_ip |
463 | mov edi, ETH_FRAME.Data + ARP_PACKET.SenderIP |
464 | mov edi, ETH_FRAME.Data + ARP_PACKET.SenderIP |
464 | movsd |
465 | movsd |
465 | 466 | ||
466 | ; Now, send it! |
467 | ; Now, send it! |
467 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetMAC ;ptr to destination MAC address |
468 | mov edi, ETH_FRAME.Data + ARP_PACKET.TargetMAC;ptr to destination MAC address |
468 | mov bx, ETHER_ARP ;type of protocol |
469 | mov bx, ETHER_ARP ;type of protocol |
469 | mov ecx, 28 ;data size |
470 | mov ecx, 28 ;data size |
470 | mov esi, ETH_FRAME.Data + ARP_PACKET ;ptr to data |
471 | mov esi, ETH_FRAME.Data + ARP_PACKET ;ptr to data |
471 | push ebp |
472 | push ebp |
472 | call dword [drvr_transmit] ;transmit packet |
473 | call dword [drvr_transmit] ;transmit packet |
473 | pop ebp |
474 | pop ebp |
474 | 475 | ||
475 | .exit: |
476 | .exit: |
476 | ret |
477 | ret |
477 | 478 | ||
478 | 479 | ||
479 | ;*************************************************************************** |
480 | ;*************************************************************************** |
480 | ; Function |
481 | ; Function |
481 | ; arp_request [by Johnny_B] |
482 | ; arp_request [by Johnny_B] |
482 | ; |
483 | ; |
483 | ; Description |
484 | ; Description |
484 | ; Sends an ARP request on the ethernet |
485 | ; Sends an ARP request on the ethernet |
485 | ; IN: |
486 | ; IN: |
486 | ; TargetIP : requested IP address |
487 | ; TargetIP : requested IP address |
487 | ; SenderIP_ptr : POINTER to sender's IP address(our system's address) |
488 | ; SenderIP_ptr : POINTER to sender's IP address(our system's address) |
488 | ; SenderMAC_ptr : POINTER to sender's MAC address(our system's address) |
489 | ; SenderMAC_ptr : POINTER to sender's MAC address(our system's address) |
489 | ; OUT: |
490 | ; OUT: |
490 | ; EAX=0 (if all is ok), otherwise EAX is not defined |
491 | ; EAX=0 (if all is ok), otherwise EAX is not defined |
491 | ; |
492 | ; |
492 | ; EBX,ESI,EDI will be saved |
493 | ; EBX,ESI,EDI will be saved |
493 | ; |
494 | ; |
494 | ;*************************************************************************** |
495 | ;*************************************************************************** |
495 | proc arp_request stdcall uses ebx esi edi,\ |
496 | proc arp_request stdcall uses ebx esi edi,\ |
496 | TargetIP:DWORD, SenderIP_ptr:DWORD, SenderMAC_ptr:DWORD |
497 | TargetIP:DWORD, SenderIP_ptr:DWORD, SenderMAC_ptr:DWORD |
497 | 498 | ||
498 | inc dword[arp_tx_count] ; increase counter |
499 | inc dword[arp_tx_count]; increase counter |
499 | 500 | ||
500 | sub esp, 28 ; allocate memory for ARP_PACKET |
501 | sub esp, 28; allocate memory for ARP_PACKET |
501 | 502 | ||
502 | mov word[esp + ARP_PACKET.HardwareType],0x0100 ;Ethernet |
503 | mov word[esp + ARP_PACKET.HardwareType], 0x0100;Ethernet |
503 | mov word[esp + ARP_PACKET.ProtocolType],0x0008 ;IP |
504 | mov word[esp + ARP_PACKET.ProtocolType], 0x0008;IP |
504 | mov byte[esp + ARP_PACKET.HardwareSize],0x06 ;MAC-addr length |
505 | mov byte[esp + ARP_PACKET.HardwareSize], 0x06;MAC-addr length |
505 | mov byte[esp + ARP_PACKET.ProtocolSize],0x04 ;IP-addr length |
506 | mov byte[esp + ARP_PACKET.ProtocolSize], 0x04;IP-addr length |
506 | mov word[esp + ARP_PACKET.Opcode],0x0100 ;Request |
507 | mov word[esp + ARP_PACKET.Opcode], 0x0100 ;Request |
507 | 508 | ||
508 | cld |
509 | cld |
509 | mov esi,[SenderMAC_ptr] |
510 | mov esi, [SenderMAC_ptr] |
510 | lea edi,[esp + ARP_PACKET.SenderMAC] ;Our MAC-addr |
511 | lea edi, [esp + ARP_PACKET.SenderMAC] ;Our MAC-addr |
511 | movsd |
512 | movsd |
512 | movsw |
513 | movsw |
513 | 514 | ||
514 | mov esi,[SenderIP_ptr] |
515 | mov esi, [SenderIP_ptr] |
515 | lea edi,[esp + ARP_PACKET.SenderIP] ;Our IP-addr |
516 | lea edi, [esp + ARP_PACKET.SenderIP] ;Our IP-addr |
516 | movsd |
517 | movsd |
517 | 518 | ||
518 | xor eax, eax |
519 | xor eax, eax |
519 | lea edi, [esp + ARP_PACKET.TargetMAC] ;Required MAC-addr(zeroed) |
520 | lea edi, [esp + ARP_PACKET.TargetMAC] ;Required MAC-addr(zeroed) |
520 | stosd |
521 | stosd |
521 | stosw |
522 | stosw |
522 | 523 | ||
523 | mov esi, dword[TargetIP] |
524 | mov esi, dword[TargetIP] |
524 | mov dword[esp + ARP_PACKET.TargetIP],esi ;Required IP-addr(we get it as function parameter) |
525 | mov dword[esp + ARP_PACKET.TargetIP], esi;Required IP-addr(we get it as function parameter) |
525 | 526 | ||
526 | ; Now, send it! |
527 | ; Now, send it! |
527 | mov edi, broadcast_add ; Pointer to 48 bit destination address |
528 | mov edi, broadcast_add ; Pointer to 48 bit destination address |
528 | mov bx, ETHER_ARP ; Type of packet |
529 | mov bx, ETHER_ARP ; Type of packet |
529 | mov ecx, 28 ; size of packet |
530 | mov ecx, 28 ; size of packet |
530 | lea esi, [esp + ARP_PACKET]; pointer to packet data |
531 | lea esi, [esp + ARP_PACKET]; pointer to packet data |
531 | push ebp |
532 | push ebp |
532 | call dword [drvr_transmit] ; Call the drivers transmit function |
533 | call dword [drvr_transmit]; Call the drivers transmit function |
533 | pop ebp |
534 | pop ebp |
534 | 535 | ||
535 | add esp, 28 ; free memory, allocated before for ARP_PACKET |
536 | add esp, 28; free memory, allocated before for ARP_PACKET |
536 | 537 | ||
537 | ; Add an entry in the ARP table, awaiting response |
538 | ; Add an entry in the ARP table, awaiting response |
538 | sub esp, ARP_ENTRY_SIZE ;allocate memory for ARP-entry |
539 | sub esp, ARP_ENTRY_SIZE;allocate memory for ARP-entry |
539 | 540 | ||
540 | mov esi, dword[TargetIP] |
541 | mov esi, dword[TargetIP] |
541 | mov dword[esp + ARP_ENTRY.IP],esi |
542 | mov dword[esp + ARP_ENTRY.IP], esi |
542 | 543 | ||
543 | lea edi, [esp + ARP_ENTRY.MAC] |
544 | lea edi, [esp + ARP_ENTRY.MAC] |
544 | xor eax, eax |
545 | xor eax, eax |
545 | stosd |
546 | stosd |
546 | stosw |
547 | stosw |
547 | 548 | ||
548 | mov word[esp + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE |
549 | mov word[esp + ARP_ENTRY.Status], ARP_AWAITING_RESPONSE |
549 | mov word[esp + ARP_ENTRY.TTL], 0x000A ; 10 seconds |
550 | mov word[esp + ARP_ENTRY.TTL], 0x000A; 10 seconds |
550 | 551 | ||
551 | stdcall arp_table_manager,ARP_TABLE_ADD,EXTRA_IS_ARP_ENTRY_PTR,esp |
552 | stdcall arp_table_manager, ARP_TABLE_ADD, EXTRA_IS_ARP_ENTRY_PTR, esp |
552 | add esp, ARP_ENTRY_SIZE ; free memory |
553 | add esp, ARP_ENTRY_SIZE; free memory |
553 | 554 | ||
554 | .exit: |
555 | .exit: |
555 | ret |
556 | ret |
556 | endp |
557 | endp |