Rev 6475 | Rev 6908 | Go to most recent revision | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 6475 | Rev 6907 | ||
---|---|---|---|
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2016. 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 | ;; IPv4.INC ;; |
6 | ;; IPv4.INC ;; |
7 | ;; ;; |
7 | ;; ;; |
8 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
8 | ;; Part of the TCP/IP network stack for KolibriOS ;; |
9 | ;; ;; |
9 | ;; ;; |
10 | ;; Based on the work of [Johnny_B] and [smb] ;; |
10 | ;; Based on the work of [Johnny_B] and [smb] ;; |
11 | ;; ;; |
11 | ;; ;; |
12 | ;; Written by hidnplayr@kolibrios.org ;; |
12 | ;; Written by hidnplayr@kolibrios.org ;; |
13 | ;; ;; |
13 | ;; ;; |
14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
14 | ;; GNU GENERAL PUBLIC LICENSE ;; |
15 | ;; Version 2, June 1991 ;; |
15 | ;; Version 2, June 1991 ;; |
16 | ;; ;; |
16 | ;; ;; |
17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
17 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
18 | 18 | ||
19 | $Revision: 6475 $ |
19 | $Revision: 6907 $ |
20 | 20 | ||
21 | IPv4_MAX_FRAGMENTS = 64 |
21 | IPv4_MAX_FRAGMENTS = 64 |
22 | IPv4_MAX_ROUTES = 64 |
22 | IPv4_MAX_ROUTES = 64 |
23 | 23 | ||
24 | IPv4_ROUTE_FLAG_UP = 1 shl 0 |
24 | IPv4_ROUTE_FLAG_UP = 1 shl 0 |
25 | IPv4_ROUTE_FLAG_GATEWAY = 1 shl 1 |
25 | IPv4_ROUTE_FLAG_GATEWAY = 1 shl 1 |
26 | IPv4_ROUTE_FLAG_HOST = 1 shl 2 |
26 | IPv4_ROUTE_FLAG_HOST = 1 shl 2 |
27 | IPv4_ROUTE_FLAG_D = 1 shl 3 ; Route was created by a redirect |
27 | IPv4_ROUTE_FLAG_D = 1 shl 3 ; Route was created by a redirect |
28 | IPv4_ROUTE_FLAG_M = 1 shl 4 ; Route was modified by a redirect |
28 | IPv4_ROUTE_FLAG_M = 1 shl 4 ; Route was modified by a redirect |
29 | 29 | ||
30 | struct IPv4_header |
30 | struct IPv4_header |
31 | 31 | ||
32 | VersionAndIHL db ? ; Version[0-3 bits] and IHL(header length)[4-7 bits] |
32 | VersionAndIHL db ? ; Version[0-3 bits] and IHL(header length)[4-7 bits] |
33 | TypeOfService db ? ; precedence [7-5] minimize delay [4], maximize throughput [3], maximize riliability [2] minimize momentary cost [1] and zero [0] |
33 | TypeOfService db ? ; precedence [7-5] minimize delay [4], maximize throughput [3], maximize riliability [2] minimize momentary cost [1] and zero [0] |
34 | TotalLength dw ? |
34 | TotalLength dw ? |
35 | Identification dw ? |
35 | Identification dw ? |
36 | FlagsAndFragmentOffset dw ? ; Flags[0-2] and FragmentOffset[3-15] |
36 | FlagsAndFragmentOffset dw ? ; Flags[0-2] and FragmentOffset[3-15] |
37 | TimeToLive db ? ; |
37 | TimeToLive db ? ; |
38 | Protocol db ? |
38 | Protocol db ? |
39 | HeaderChecksum dw ? |
39 | HeaderChecksum dw ? |
40 | SourceAddress dd ? |
40 | SourceAddress dd ? |
41 | DestinationAddress dd ? |
41 | DestinationAddress dd ? |
42 | 42 | ||
43 | ends |
43 | ends |
44 | 44 | ||
45 | struct IPv4_FRAGMENT_slot |
45 | struct IPv4_FRAGMENT_slot |
46 | 46 | ||
47 | ttl dw ? ; Time to live for this entry, 0 for empty slot's |
47 | ttl dw ? ; Time to live for this entry, 0 for empty slot's |
48 | id dw ? ; Identification field from IP header |
48 | id dw ? ; Identification field from IP header |
49 | SrcIP dd ? ; .. from IP header |
49 | SrcIP dd ? ; .. from IP header |
50 | DstIP dd ? ; .. from IP header |
50 | DstIP dd ? ; .. from IP header |
51 | ptr dd ? ; Pointer to first packet |
51 | ptr dd ? ; Pointer to first packet |
52 | 52 | ||
53 | ends |
53 | ends |
54 | 54 | ||
55 | struct IPv4_FRAGMENT_entry ; This structure will replace the ethernet header in fragmented ip packets |
55 | struct IPv4_FRAGMENT_entry ; This structure will replace the ethernet header in fragmented ip packets |
56 | 56 | ||
57 | PrevPtr dd ? ; Pointer to previous fragment entry (-1 for first packet) |
57 | PrevPtr dd ? ; Pointer to previous fragment entry (-1 for first packet) |
58 | NextPtr dd ? ; Pointer to next fragment entry (-1 for last packet) |
58 | NextPtr dd ? ; Pointer to next fragment entry (-1 for last packet) |
59 | Owner dd ? ; Pointer to structure of driver |
59 | Owner dd ? ; Pointer to structure of driver |
60 | rb 2 ; to match ethernet header size ;;; FIXME |
60 | rb 2 ; to match ethernet header size ;;; FIXME |
61 | ; Ip header begins here (we will need the IP header to re-construct the complete packet) |
61 | ; Ip header begins here (we will need the IP header to re-construct the complete packet) |
62 | ends |
62 | ends |
63 | 63 | ||
64 | struct IPv4_ROUTE |
64 | struct IPv4_ROUTE |
65 | 65 | ||
66 | Destination dd ? |
66 | Destination dd ? |
67 | Gateway dd ? |
67 | Gateway dd ? |
68 | Flags dd ? |
68 | Flags dd ? |
69 | Use dd ? |
69 | Use dd ? |
70 | Interface dd ? |
70 | Interface dd ? |
71 | 71 | ||
72 | ends |
72 | ends |
73 | 73 | ||
74 | 74 | ||
75 | uglobal |
75 | uglobal |
76 | align 4 |
76 | align 4 |
77 | 77 | ||
78 | IP_LIST rd NET_DEVICES_MAX |
78 | IP_LIST rd NET_DEVICES_MAX |
79 | SUBNET_LIST rd NET_DEVICES_MAX |
79 | SUBNET_LIST rd NET_DEVICES_MAX |
80 | DNS_LIST rd NET_DEVICES_MAX |
80 | DNS_LIST rd NET_DEVICES_MAX |
81 | GATEWAY_LIST rd NET_DEVICES_MAX |
81 | GATEWAY_LIST rd NET_DEVICES_MAX |
82 | BROADCAST_LIST rd NET_DEVICES_MAX |
82 | BROADCAST_LIST rd NET_DEVICES_MAX |
83 | 83 | ||
84 | IPv4_packets_tx rd NET_DEVICES_MAX |
84 | IPv4_packets_tx rd NET_DEVICES_MAX |
85 | IPv4_packets_rx rd NET_DEVICES_MAX |
85 | IPv4_packets_rx rd NET_DEVICES_MAX |
86 | IPv4_packets_dumped rd NET_DEVICES_MAX |
86 | IPv4_packets_dumped rd NET_DEVICES_MAX |
87 | 87 | ||
88 | IPv4_FRAGMENT_LIST rb IPv4_MAX_FRAGMENTS * sizeof.IPv4_FRAGMENT_slot |
88 | IPv4_FRAGMENT_LIST rb IPv4_MAX_FRAGMENTS * sizeof.IPv4_FRAGMENT_slot |
89 | 89 | ||
90 | IPv4_ROUTES rd IPv4_MAX_ROUTES * sizeof.IPv4_ROUTE |
90 | IPv4_ROUTES rd IPv4_MAX_ROUTES * sizeof.IPv4_ROUTE |
91 | 91 | ||
92 | endg |
92 | endg |
93 | 93 | ||
94 | 94 | ||
95 | ;-----------------------------------------------------------------; |
95 | ;-----------------------------------------------------------------; |
96 | ; ; |
96 | ; ; |
97 | ; ipv4_init: Resets all IPv4 variables ; |
97 | ; ipv4_init: Resets all IPv4 variables ; |
98 | ; ; |
98 | ; ; |
99 | ;-----------------------------------------------------------------; |
99 | ;-----------------------------------------------------------------; |
100 | macro ipv4_init { |
100 | macro ipv4_init { |
101 | 101 | ||
102 | xor eax, eax |
102 | xor eax, eax |
103 | mov edi, IP_LIST |
103 | mov edi, IP_LIST |
104 | mov ecx, 7*NET_DEVICES_MAX + (sizeof.IPv4_FRAGMENT_slot*IPv4_MAX_FRAGMENTS)/4 |
104 | mov ecx, 7*NET_DEVICES_MAX + (sizeof.IPv4_FRAGMENT_slot*IPv4_MAX_FRAGMENTS)/4 |
105 | rep stosd |
105 | rep stosd |
106 | 106 | ||
107 | } |
107 | } |
108 | 108 | ||
109 | 109 | ||
110 | ;-----------------------------------------------------------------; |
110 | ;-----------------------------------------------------------------; |
111 | ; ; |
111 | ; ; |
112 | ; Decrease TimeToLive of all fragment slots ; |
112 | ; Decrease TimeToLive of all fragment slots ; |
113 | ; ; |
113 | ; ; |
114 | ;-----------------------------------------------------------------; |
114 | ;-----------------------------------------------------------------; |
115 | macro ipv4_decrease_fragment_ttls { |
115 | macro ipv4_decrease_fragment_ttls { |
116 | 116 | ||
117 | local .loop, .next |
117 | local .loop, .next |
118 | 118 | ||
119 | mov esi, IPv4_FRAGMENT_LIST |
119 | mov esi, IPv4_FRAGMENT_LIST |
120 | mov ecx, IPv4_MAX_FRAGMENTS |
120 | mov ecx, IPv4_MAX_FRAGMENTS |
121 | .loop: |
121 | .loop: |
122 | cmp [esi + IPv4_FRAGMENT_slot.ttl], 0 |
122 | cmp [esi + IPv4_FRAGMENT_slot.ttl], 0 |
123 | je .next |
123 | je .next |
124 | dec [esi + IPv4_FRAGMENT_slot.ttl] |
124 | dec [esi + IPv4_FRAGMENT_slot.ttl] |
125 | jz .died |
125 | jz .died |
126 | .next: |
126 | .next: |
127 | add esi, sizeof.IPv4_FRAGMENT_slot |
127 | add esi, sizeof.IPv4_FRAGMENT_slot |
128 | dec ecx |
128 | dec ecx |
129 | jnz .loop |
129 | jnz .loop |
130 | jmp .done |
130 | jmp .done |
131 | 131 | ||
132 | .died: |
132 | .died: |
133 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4 Fragment slot timed-out!\n" |
133 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4 Fragment slot timed-out!\n" |
134 | ;;; TODO: clear all entry's of timed-out slot |
134 | ;;; TODO: clear all entry's of timed-out slot |
135 | jmp .next |
135 | jmp .next |
136 | 136 | ||
137 | .done: |
137 | .done: |
138 | } |
138 | } |
139 | 139 | ||
140 | 140 | ||
141 | 141 | ||
142 | macro ipv4_checksum ptr { |
142 | macro ipv4_checksum ptr { |
143 | 143 | ||
144 | ; This is the fast procedure to create or check an IP header without options |
144 | ; This is the fast procedure to create or check an IP header without options |
145 | ; To create a new checksum, the checksum field must be set to 0 before computation |
145 | ; To create a new checksum, the checksum field must be set to 0 before computation |
146 | ; To check an existing checksum, leave the checksum as is, and it will be 0 after this procedure, if it was correct |
146 | ; To check an existing checksum, leave the checksum as is, and it will be 0 after this procedure, if it was correct |
147 | 147 | ||
148 | push ebx |
148 | push ebx |
149 | xor ebx, ebx |
149 | xor ebx, ebx |
150 | add bl, [ptr+1] |
150 | add bl, [ptr+1] |
151 | adc bh, [ptr+0] |
151 | adc bh, [ptr+0] |
152 | 152 | ||
153 | adc bl, [ptr+3] |
153 | adc bl, [ptr+3] |
154 | adc bh, [ptr+2] |
154 | adc bh, [ptr+2] |
155 | 155 | ||
156 | adc bl, [ptr+5] |
156 | adc bl, [ptr+5] |
157 | adc bh, [ptr+4] |
157 | adc bh, [ptr+4] |
158 | 158 | ||
159 | adc bl, [ptr+7] |
159 | adc bl, [ptr+7] |
160 | adc bh, [ptr+6] |
160 | adc bh, [ptr+6] |
161 | 161 | ||
162 | adc bl, [ptr+9] |
162 | adc bl, [ptr+9] |
163 | adc bh, [ptr+8] |
163 | adc bh, [ptr+8] |
164 | 164 | ||
165 | ; we skip 11th and 12th byte, they are the checksum bytes and should be 0 for re-calculation |
165 | ; we skip 11th and 12th byte, they are the checksum bytes and should be 0 for re-calculation |
166 | 166 | ||
167 | adc bl, [ptr+13] |
167 | adc bl, [ptr+13] |
168 | adc bh, [ptr+12] |
168 | adc bh, [ptr+12] |
169 | 169 | ||
170 | adc bl, [ptr+15] |
170 | adc bl, [ptr+15] |
171 | adc bh, [ptr+14] |
171 | adc bh, [ptr+14] |
172 | 172 | ||
173 | adc bl, [ptr+17] |
173 | adc bl, [ptr+17] |
174 | adc bh, [ptr+16] |
174 | adc bh, [ptr+16] |
175 | 175 | ||
176 | adc bl, [ptr+19] |
176 | adc bl, [ptr+19] |
177 | adc bh, [ptr+18] |
177 | adc bh, [ptr+18] |
178 | 178 | ||
179 | adc ebx, 0 |
179 | adc ebx, 0 |
180 | 180 | ||
181 | push ecx |
181 | push ecx |
182 | mov ecx, ebx |
182 | mov ecx, ebx |
183 | shr ecx, 16 |
183 | shr ecx, 16 |
184 | and ebx, 0xffff |
184 | and ebx, 0xffff |
185 | add ebx, ecx |
185 | add ebx, ecx |
186 | 186 | ||
187 | mov ecx, ebx |
187 | mov ecx, ebx |
188 | shr ecx, 16 |
188 | shr ecx, 16 |
189 | add ebx, ecx |
189 | add ebx, ecx |
190 | 190 | ||
191 | not bx |
191 | not bx |
192 | jnz .not_zero |
192 | jnz .not_zero |
193 | dec bx |
193 | dec bx |
194 | .not_zero: |
194 | .not_zero: |
195 | xchg bl, bh |
195 | xchg bl, bh |
196 | pop ecx |
196 | pop ecx |
197 | 197 | ||
198 | neg word [ptr+10] ; zero will stay zero so we just get the checksum |
198 | neg word [ptr+10] ; zero will stay zero so we just get the checksum |
199 | add word [ptr+10], bx ; , else we will get (new checksum - old checksum) in the end, wich should be 0 :) |
199 | add word [ptr+10], bx ; , else we will get (new checksum - old checksum) in the end, wich should be 0 :) |
200 | pop ebx |
200 | pop ebx |
201 | 201 | ||
202 | } |
202 | } |
203 | 203 | ||
204 | 204 | ||
205 | 205 | ||
206 | ;-----------------------------------------------------------------; |
206 | ;-----------------------------------------------------------------; |
207 | ; ; |
207 | ; ; |
208 | ; ipv4_input: Check if IPv4 Packet isnt damaged and call ; |
208 | ; ipv4_input: Check if IPv4 Packet isnt damaged and call ; |
209 | ; appropriate handler. (TCP/UDP/ICMP/..) ; |
209 | ; appropriate handler. (TCP/UDP/ICMP/..) ; |
210 | ; We will also re-construct fragmented packets. ; |
210 | ; We will also re-construct fragmented packets. ; |
211 | ; ; |
211 | ; ; |
212 | ; IN: Pointer to buffer in [esp] ; |
212 | ; IN: Pointer to buffer in [esp] ; |
213 | ; pointer to device struct in ebx ; |
213 | ; pointer to device struct in ebx ; |
214 | ; pointer to IPv4 header in edx ; |
214 | ; pointer to IPv4 header in edx ; |
215 | ; size of IPv4 packet in ecx ; |
215 | ; size of IPv4 packet in ecx ; |
216 | ; ; |
216 | ; ; |
217 | ; OUT: / ; |
217 | ; OUT: / ; |
218 | ; ; |
218 | ; ; |
219 | ;-----------------------------------------------------------------; |
219 | ;-----------------------------------------------------------------; |
220 | align 4 |
220 | align 4 |
221 | ipv4_input: |
221 | ipv4_input: |
222 | 222 | ||
223 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: packet from %u.%u.%u.%u ",\ |
223 | DEBUGF 1, "IPv4_input: packet from %u.%u.%u.%u ",\ |
224 | [edx + IPv4_header.SourceAddress + 0]:1,[edx + IPv4_header.SourceAddress + 1]:1,\ |
224 | [edx + IPv4_header.SourceAddress + 0]:1,[edx + IPv4_header.SourceAddress + 1]:1,\ |
225 | [edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
225 | [edx + IPv4_header.SourceAddress + 2]:1,[edx + IPv4_header.SourceAddress + 3]:1 |
226 | DEBUGF DEBUG_NETWORK_VERBOSE, "to %u.%u.%u.%u\n",\ |
226 | DEBUGF DEBUG_NETWORK_VERBOSE, "to %u.%u.%u.%u\n",\ |
227 | [edx + IPv4_header.DestinationAddress + 0]:1,[edx + IPv4_header.DestinationAddress + 1]:1,\ |
227 | [edx + IPv4_header.DestinationAddress + 0]:1,[edx + IPv4_header.DestinationAddress + 1]:1,\ |
228 | [edx + IPv4_header.DestinationAddress + 2]:1,[edx + IPv4_header.DestinationAddress + 3]:1 |
228 | [edx + IPv4_header.DestinationAddress + 2]:1,[edx + IPv4_header.DestinationAddress + 3]:1 |
229 | 229 | ||
230 | call net_ptr_to_num4 |
230 | call net_ptr_to_num4 |
231 | cmp edi, -1 |
231 | cmp edi, -1 |
232 | je .invalid_device |
232 | je .invalid_device |
233 | 233 | ||
234 | ;------------------------------- |
234 | ;------------------------------- |
235 | ; re-calculate the checksum |
235 | ; re-calculate the checksum |
236 | 236 | ||
237 | ipv4_checksum edx |
237 | ipv4_checksum edx |
238 | jnz .dump ; if checksum isn't valid then dump packet |
238 | jnz .dump ; if checksum isn't valid then dump packet |
239 | 239 | ||
240 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Checksum ok\n" |
240 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Checksum ok\n" |
241 | 241 | ||
242 | ;-------------------------------- |
242 | ;-------------------------------- |
243 | ; Check if destination IP matches |
243 | ; Check if destination IP matches |
244 | 244 | ||
245 | ; local ip (Using RFC1122 strong end system model) |
245 | ; local ip (Using RFC1122 strong end system model) |
246 | mov eax, [edx + IPv4_header.DestinationAddress] |
246 | mov eax, [edx + IPv4_header.DestinationAddress] |
247 | cmp eax, [IP_LIST + edi] |
247 | cmp eax, [IP_LIST + edi] |
248 | je .ip_ok |
248 | je .ip_ok |
249 | 249 | ||
250 | ; network layer broadcast |
250 | ; network layer broadcast |
251 | cmp eax, [BROADCAST_LIST + edi] |
251 | cmp eax, [BROADCAST_LIST + edi] |
252 | je .ip_ok |
252 | je .ip_ok |
253 | 253 | ||
254 | ; physical layer broadcast (255.255.255.255) |
254 | ; physical layer broadcast (255.255.255.255) |
255 | cmp eax, 0xffffffff |
255 | cmp eax, 0xffffffff |
256 | je .ip_ok |
256 | je .ip_ok |
257 | 257 | ||
258 | ; multicast (224.0.0.0/4 = 224.0.0.0 to 239.255.255.255) |
258 | ; multicast (224.0.0.0/4 = 224.0.0.0 to 239.255.255.255) |
259 | and eax, 0x0fffffff |
259 | and eax, 0x0fffffff |
260 | cmp eax, 224 |
260 | cmp eax, 224 |
261 | je .ip_ok |
261 | je .ip_ok |
262 | 262 | ||
263 | ; maybe we just dont have an IP yet and should accept everything on the IP level |
263 | ; maybe we just dont have an IP yet and should accept everything on the IP level |
264 | cmp [IP_LIST + edi], 0 |
264 | cmp [IP_LIST + edi], 0 |
265 | je .ip_ok |
265 | je .ip_ok |
266 | 266 | ||
267 | ; or it's just not meant for us.. :( |
267 | ; or it's just not meant for us.. :( |
268 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destination address does not match!\n" |
268 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destination address does not match!\n" |
269 | jmp .dump |
269 | jmp .dump |
270 | 270 | ||
271 | ;------------------------ |
271 | ;------------------------ |
272 | ; Now we can update stats |
272 | ; Now we can update stats |
273 | 273 | ||
274 | .ip_ok: |
274 | .ip_ok: |
275 | inc [IPv4_packets_rx + edi] |
275 | inc [IPv4_packets_rx + edi] |
276 | 276 | ||
277 | ;---------------------------------- |
277 | ;---------------------------------- |
278 | ; Check if the packet is fragmented |
278 | ; Check if the packet is fragmented |
279 | 279 | ||
280 | test [edx + IPv4_header.FlagsAndFragmentOffset], 1 shl 5 ; Is 'more fragments' flag set ? |
280 | test [edx + IPv4_header.FlagsAndFragmentOffset], 1 shl 5 ; Is 'more fragments' flag set ? |
281 | jnz .has_fragments ; If so, we definately have a fragmented packet |
281 | jnz .has_fragments ; If so, we definately have a fragmented packet |
282 | 282 | ||
283 | test [edx + IPv4_header.FlagsAndFragmentOffset], 0xff1f ; If flag is not set, but there is a fragment offset, the packet is last in series of fragmented packets |
283 | test [edx + IPv4_header.FlagsAndFragmentOffset], 0xff1f ; If flag is not set, but there is a fragment offset, the packet is last in series of fragmented packets |
284 | jnz .is_last_fragment |
284 | jnz .is_last_fragment |
285 | 285 | ||
286 | ;------------------------------------------------------------------- |
286 | ;------------------------------------------------------------------- |
287 | ; No, it's just a regular IP packet, pass it to the higher protocols |
287 | ; No, it's just a regular IP packet, pass it to the higher protocols |
288 | 288 | ||
289 | .handle_it: ; We reach here if packet hasnt been fragmented, or when it already has been re-constructed |
289 | .handle_it: ; We reach here if packet hasnt been fragmented, or when it already has been re-constructed |
290 | 290 | ||
291 | movzx esi, [edx + IPv4_header.VersionAndIHL] ; Calculate Header length by using IHL field |
291 | movzx esi, [edx + IPv4_header.VersionAndIHL] ; Calculate Header length by using IHL field |
292 | and esi, 0x0000000f ; |
292 | and esi, 0x0000000f ; |
293 | shl esi, 2 ; |
293 | shl esi, 2 ; |
294 | 294 | ||
295 | movzx ecx, [edx + IPv4_header.TotalLength] ; Calculate length of encapsulated Packet |
295 | movzx ecx, [edx + IPv4_header.TotalLength] ; Calculate length of encapsulated Packet |
296 | xchg cl, ch ; |
296 | xchg cl, ch ; |
297 | sub ecx, esi ; |
297 | sub ecx, esi ; |
298 | 298 | ||
299 | mov al, [edx + IPv4_header.Protocol] |
299 | mov al, [edx + IPv4_header.Protocol] |
300 | add esi, edx ; make esi ptr to data |
300 | add esi, edx ; make esi ptr to data |
301 | 301 | ||
302 | cmp al, IP_PROTO_TCP |
302 | cmp al, IP_PROTO_TCP |
303 | je tcp_input |
303 | je tcp_input |
304 | 304 | ||
305 | cmp al, IP_PROTO_UDP |
305 | cmp al, IP_PROTO_UDP |
306 | je udp_input |
306 | je udp_input |
307 | 307 | ||
308 | cmp al, IP_PROTO_ICMP |
308 | cmp al, IP_PROTO_ICMP |
309 | je icmp_input |
309 | je icmp_input |
310 | 310 | ||
311 | ;------------------------------- |
311 | ;------------------------------- |
312 | ; Look for a matching RAW socket |
312 | ; Look for a matching RAW socket |
313 | pusha |
313 | pusha |
314 | mov ecx, socket_mutex |
314 | mov ecx, socket_mutex |
315 | call mutex_lock |
315 | call mutex_lock |
316 | popa |
316 | popa |
317 | 317 | ||
318 | add ecx, esi |
318 | add ecx, esi |
319 | sub ecx, edx |
319 | sub ecx, edx |
320 | mov esi, edx |
320 | mov esi, edx |
321 | movzx edx, al |
321 | movzx edx, al |
322 | mov eax, net_sockets |
322 | mov eax, net_sockets |
323 | .next_socket: |
323 | .next_socket: |
324 | mov eax, [eax + SOCKET.NextPtr] |
324 | mov eax, [eax + SOCKET.NextPtr] |
325 | or eax, eax |
325 | or eax, eax |
326 | jz .dump_unlock |
326 | jz .dump_unlock |
327 | 327 | ||
328 | cmp [eax + SOCKET.Domain], AF_INET4 |
328 | cmp [eax + SOCKET.Domain], AF_INET4 |
329 | jne .next_socket |
329 | jne .next_socket |
330 | 330 | ||
331 | cmp [eax + SOCKET.Protocol], edx |
331 | cmp [eax + SOCKET.Protocol], edx |
332 | jne .next_socket |
332 | jne .next_socket |
333 | 333 | ||
334 | pusha |
334 | pusha |
335 | mov ecx, socket_mutex |
335 | mov ecx, socket_mutex |
336 | call mutex_unlock |
336 | call mutex_unlock |
337 | popa |
337 | popa |
338 | 338 | ||
339 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: found matching RAW socket: 0x%x\n", eax |
339 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: found matching RAW socket: 0x%x\n", eax |
340 | 340 | ||
341 | pusha |
341 | pusha |
342 | lea ecx, [eax + SOCKET.mutex] |
342 | lea ecx, [eax + SOCKET.mutex] |
343 | call mutex_lock |
343 | call mutex_lock |
344 | popa |
344 | popa |
345 | 345 | ||
346 | jmp socket_input |
346 | jmp socket_input |
347 | 347 | ||
348 | .dump_unlock: |
348 | .dump_unlock: |
349 | 349 | ||
350 | pusha |
350 | pusha |
351 | mov ecx, socket_mutex |
351 | mov ecx, socket_mutex |
352 | call mutex_unlock |
352 | call mutex_unlock |
353 | popa |
353 | popa |
354 | 354 | ||
355 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: unknown protocol %u\n", al |
355 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: unknown protocol %u\n", al |
356 | 356 | ||
357 | .dump: |
357 | .dump: |
358 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: dumping\n" |
358 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: dumping\n" |
359 | inc [IPv4_packets_dumped + edi] |
359 | inc [IPv4_packets_dumped + edi] |
360 | call net_buff_free |
360 | call net_buff_free |
361 | ret |
361 | ret |
362 | 362 | ||
363 | .invalid_device: |
363 | .invalid_device: |
364 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_input: packet originated from invalid device\n" |
364 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_input: packet originated from invalid device\n" |
365 | call net_buff_free |
365 | call net_buff_free |
366 | ret |
366 | ret |
367 | 367 | ||
368 | 368 | ||
369 | ;--------------------------- |
369 | ;--------------------------- |
370 | ; Fragmented packet handler |
370 | ; Fragmented packet handler |
371 | 371 | ||
372 | 372 | ||
373 | .has_fragments: |
373 | .has_fragments: |
374 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
374 | movzx eax, [edx + IPv4_header.FlagsAndFragmentOffset] |
375 | xchg al, ah |
375 | xchg al, ah |
376 | shl ax, 3 |
376 | shl ax, 3 |
377 | 377 | ||
378 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: fragmented packet offset=%u id=%x ptr=0x%x\n", ax, [edx + IPv4_header.Identification]:4, edx |
378 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: fragmented packet offset=%u id=%x ptr=0x%x\n", ax, [edx + IPv4_header.Identification]:4, edx |
379 | 379 | ||
380 | test ax, ax ; Is this the first packet of the fragment? |
380 | test ax, ax ; Is this the first packet of the fragment? |
381 | jz .is_first_fragment |
381 | jz .is_first_fragment |
382 | 382 | ||
383 | 383 | ||
384 | ;------------------------------------------------------- |
384 | ;------------------------------------------------------- |
385 | ; We have a fragmented IP packet, but it's not the first |
385 | ; We have a fragmented IP packet, but it's not the first |
386 | 386 | ||
387 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Middle fragment packet received!\n" |
387 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Middle fragment packet received!\n" |
388 | 388 | ||
389 | call ipv4_find_fragment_slot |
389 | call ipv4_find_fragment_slot |
390 | cmp esi, -1 |
390 | cmp esi, -1 |
391 | je .dump |
391 | je .dump |
392 | 392 | ||
393 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; Reset the ttl |
393 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; Reset the ttl |
394 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] |
394 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] |
395 | or edi, -1 |
395 | or edi, -1 |
396 | .find_last_entry: ; The following routine will try to find the last entry |
396 | .find_last_entry: ; The following routine will try to find the last entry |
397 | cmp edi, [esi + IPv4_FRAGMENT_entry.PrevPtr] |
397 | cmp edi, [esi + IPv4_FRAGMENT_entry.PrevPtr] |
398 | jne .destroy_slot ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
398 | jne .destroy_slot ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
399 | mov edi, esi |
399 | mov edi, esi |
400 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
400 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
401 | cmp esi, -1 |
401 | cmp esi, -1 |
402 | jne .find_last_entry |
402 | jne .find_last_entry |
403 | ; We found the last entry (pointer is now in edi) |
403 | ; We found the last entry (pointer is now in edi) |
404 | ; We are going to overwrite the ethernet header in received packet with a FRAGMENT_entry structure |
404 | ; We are going to overwrite the ethernet header in received packet with a FRAGMENT_entry structure |
405 | 405 | ||
406 | pop eax ; pointer to packet |
406 | pop eax ; pointer to packet |
407 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], eax ; update pointer of previous entry to the new entry |
407 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], eax ; update pointer of previous entry to the new entry |
408 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
408 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
409 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], edi |
409 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], edi |
410 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
410 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
411 | 411 | ||
412 | ret |
412 | ret |
413 | 413 | ||
414 | 414 | ||
415 | ;------------------------------------ |
415 | ;------------------------------------ |
416 | ; We have received the first fragment |
416 | ; We have received the first fragment |
417 | 417 | ||
418 | .is_first_fragment: |
418 | .is_first_fragment: |
419 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: First fragment packet received!\n" |
419 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: First fragment packet received!\n" |
420 | ; try to locate a free slot.. |
420 | ; try to locate a free slot.. |
421 | mov ecx, IPv4_MAX_FRAGMENTS |
421 | mov ecx, IPv4_MAX_FRAGMENTS |
422 | mov esi, IPv4_FRAGMENT_LIST |
422 | mov esi, IPv4_FRAGMENT_LIST |
423 | .find_free_slot: |
423 | .find_free_slot: |
424 | cmp word [esi + IPv4_FRAGMENT_slot.ttl], 0 |
424 | cmp word [esi + IPv4_FRAGMENT_slot.ttl], 0 |
425 | je .found_free_slot |
425 | je .found_free_slot |
426 | add esi, sizeof.IPv4_FRAGMENT_slot |
426 | add esi, sizeof.IPv4_FRAGMENT_slot |
427 | loop .find_free_slot |
427 | loop .find_free_slot |
428 | jmp .dump ; If no free slot was found, dump the packet |
428 | jmp .dump ; If no free slot was found, dump the packet |
429 | 429 | ||
430 | .found_free_slot: ; We found a free slot, let's fill in the FRAGMENT_slot structure |
430 | .found_free_slot: ; We found a free slot, let's fill in the FRAGMENT_slot structure |
431 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; RFC recommends 15 secs as ttl |
431 | mov [esi + IPv4_FRAGMENT_slot.ttl], 15 ; RFC recommends 15 secs as ttl |
432 | mov ax, [edx + IPv4_header.Identification] |
432 | mov ax, [edx + IPv4_header.Identification] |
433 | mov [esi + IPv4_FRAGMENT_slot.id], ax |
433 | mov [esi + IPv4_FRAGMENT_slot.id], ax |
434 | mov eax, [edx + IPv4_header.SourceAddress] |
434 | mov eax, [edx + IPv4_header.SourceAddress] |
435 | mov [esi + IPv4_FRAGMENT_slot.SrcIP], eax |
435 | mov [esi + IPv4_FRAGMENT_slot.SrcIP], eax |
436 | mov eax, [edx + IPv4_header.DestinationAddress] |
436 | mov eax, [edx + IPv4_header.DestinationAddress] |
437 | mov [esi + IPv4_FRAGMENT_slot.DstIP], eax |
437 | mov [esi + IPv4_FRAGMENT_slot.DstIP], eax |
438 | pop eax |
438 | pop eax |
439 | mov [esi + IPv4_FRAGMENT_slot.ptr], eax |
439 | mov [esi + IPv4_FRAGMENT_slot.ptr], eax |
440 | ; Now, replace ethernet header in original buffer with a FRAGMENT_entry structure |
440 | ; Now, replace ethernet header in original buffer with a FRAGMENT_entry structure |
441 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
441 | mov [eax + IPv4_FRAGMENT_entry.NextPtr], -1 |
442 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], -1 |
442 | mov [eax + IPv4_FRAGMENT_entry.PrevPtr], -1 |
443 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
443 | mov [eax + IPv4_FRAGMENT_entry.Owner], ebx |
444 | 444 | ||
445 | ret |
445 | ret |
446 | 446 | ||
447 | 447 | ||
448 | ;----------------------------------- |
448 | ;----------------------------------- |
449 | ; We have received the last fragment |
449 | ; We have received the last fragment |
450 | 450 | ||
451 | .is_last_fragment: |
451 | .is_last_fragment: |
452 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Last fragment packet received!\n" |
452 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Last fragment packet received!\n" |
453 | 453 | ||
454 | call ipv4_find_fragment_slot |
454 | call ipv4_find_fragment_slot |
455 | cmp esi, -1 |
455 | cmp esi, -1 |
456 | je .dump |
456 | je .dump |
457 | 457 | ||
458 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] ; We found the first entry, let's calculate total size of the packet in eax, so we can allocate a buffer |
458 | mov esi, [esi + IPv4_FRAGMENT_slot.ptr] ; We found the first entry, let's calculate total size of the packet in eax, so we can allocate a buffer |
459 | push esi |
459 | push esi |
460 | xor eax, eax |
460 | xor eax, eax |
461 | or edi, -1 |
461 | or edi, -1 |
462 | 462 | ||
463 | .count_bytes: |
463 | .count_bytes: |
464 | cmp [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
464 | cmp [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
465 | jne .destroy_slot_pop ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
465 | jne .destroy_slot_pop ; Damn, something screwed up, remove the whole slot (and free buffers too if possible!) |
466 | mov cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Add total length |
466 | mov cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Add total length |
467 | xchg cl, ch |
467 | xchg cl, ch |
468 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
468 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
469 | add ax, cx |
469 | add ax, cx |
470 | movzx cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Sub Header length |
470 | movzx cx, [esi + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Sub Header length |
471 | and cx, 0x000F |
471 | and cx, 0x000F |
472 | shl cx, 2 |
472 | shl cx, 2 |
473 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Header size=%u\n", cx |
473 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Header size=%u\n", cx |
474 | sub ax, cx |
474 | sub ax, cx |
475 | mov edi, esi |
475 | mov edi, esi |
476 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
476 | mov esi, [esi + IPv4_FRAGMENT_entry.NextPtr] |
477 | cmp esi, -1 |
477 | cmp esi, -1 |
478 | jne .count_bytes |
478 | jne .count_bytes |
479 | 479 | ||
480 | mov esi, [esp+4] |
480 | mov esi, [esp+4] |
481 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], esi ; Add this packet to the chain, this simplifies the following code |
481 | mov [edi + IPv4_FRAGMENT_entry.NextPtr], esi ; Add this packet to the chain, this simplifies the following code |
482 | mov [esi + IPv4_FRAGMENT_entry.NextPtr], -1 |
482 | mov [esi + IPv4_FRAGMENT_entry.NextPtr], -1 |
483 | mov [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
483 | mov [esi + IPv4_FRAGMENT_entry.PrevPtr], edi |
484 | mov [esi + IPv4_FRAGMENT_entry.Owner], ebx |
484 | mov [esi + IPv4_FRAGMENT_entry.Owner], ebx |
485 | 485 | ||
486 | mov cx, [edx + IPv4_header.TotalLength] ; Note: This time we dont substract Header length |
486 | mov cx, [edx + IPv4_header.TotalLength] ; Note: This time we dont substract Header length |
487 | xchg cl, ch |
487 | xchg cl, ch |
488 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
488 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Packet size=%u\n", cx |
489 | add ax, cx |
489 | add ax, cx |
490 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Received data size=%u\n", eax |
490 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Received data size=%u\n", eax |
491 | 491 | ||
492 | push eax |
492 | push eax |
493 | mov ax, [edx + IPv4_header.FlagsAndFragmentOffset] |
493 | mov ax, [edx + IPv4_header.FlagsAndFragmentOffset] |
494 | xchg al, ah |
494 | xchg al, ah |
495 | shl ax, 3 |
495 | shl ax, 3 |
496 | add cx, ax |
496 | add cx, ax |
497 | pop eax |
497 | pop eax |
498 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Fragment size=%u\n", ecx |
498 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Total Fragment size=%u\n", ecx |
499 | 499 | ||
500 | cmp ax, cx |
500 | cmp ax, cx |
501 | jne .destroy_slot_pop |
501 | jne .destroy_slot_pop |
502 | 502 | ||
503 | push eax |
503 | push eax |
504 | push eax |
504 | push eax |
505 | call kernel_alloc |
505 | call kernel_alloc |
506 | test eax, eax |
506 | test eax, eax |
507 | je .destroy_slot_pop ; If we dont have enough space to allocate the buffer, discard all packets in slot |
507 | je .destroy_slot_pop ; If we dont have enough space to allocate the buffer, discard all packets in slot |
508 | mov edx, [esp+4] ; Get pointer to first fragment entry back in edx |
508 | mov edx, [esp+4] ; Get pointer to first fragment entry back in edx |
509 | 509 | ||
510 | .rebuild_packet_loop: |
510 | .rebuild_packet_loop: |
511 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.FlagsAndFragmentOffset] ; Calculate the fragment offset |
511 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.FlagsAndFragmentOffset] ; Calculate the fragment offset |
512 | xchg cl, ch ; intel byte order |
512 | xchg cl, ch ; intel byte order |
513 | shl cx, 3 ; multiply by 8 and clear first 3 bits |
513 | shl cx, 3 ; multiply by 8 and clear first 3 bits |
514 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Fragment offset=%u\n", cx |
514 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Fragment offset=%u\n", cx |
515 | 515 | ||
516 | lea edi, [eax + ecx] ; Notice that edi will be equal to eax for first fragment |
516 | lea edi, [eax + ecx] ; Notice that edi will be equal to eax for first fragment |
517 | movzx ebx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Find header size (in ebx) of fragment |
517 | movzx ebx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.VersionAndIHL] ; Find header size (in ebx) of fragment |
518 | and bx, 0x000F ; |
518 | and bx, 0x000F ; |
519 | shl bx, 2 ; |
519 | shl bx, 2 ; |
520 | 520 | ||
521 | lea esi, [edx + sizeof.IPv4_FRAGMENT_entry] ; Set esi to the correct begin of fragment |
521 | lea esi, [edx + sizeof.IPv4_FRAGMENT_entry] ; Set esi to the correct begin of fragment |
522 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Calculate total length of fragment |
522 | movzx ecx, [edx + sizeof.IPv4_FRAGMENT_entry + IPv4_header.TotalLength] ; Calculate total length of fragment |
523 | xchg cl, ch ; intel byte order |
523 | xchg cl, ch ; intel byte order |
524 | 524 | ||
525 | cmp edi, eax ; Is this packet the first fragment ? |
525 | cmp edi, eax ; Is this packet the first fragment ? |
526 | je .first_fragment |
526 | je .first_fragment |
527 | sub cx, bx ; If not, dont copy the header |
527 | sub cx, bx ; If not, dont copy the header |
528 | add esi, ebx ; |
528 | add esi, ebx ; |
529 | .first_fragment: |
529 | .first_fragment: |
530 | 530 | ||
531 | 531 | ||
532 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Copying %u bytes from 0x%x to 0x%x\n", ecx, esi, edi |
532 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Copying %u bytes from 0x%x to 0x%x\n", ecx, esi, edi |
533 | push cx ; First copy dword-wise, then byte-wise |
533 | push cx ; First copy dword-wise, then byte-wise |
534 | shr cx, 2 ; |
534 | shr cx, 2 ; |
535 | rep movsd ; |
535 | rep movsd ; |
536 | pop cx ; |
536 | pop cx ; |
537 | and cx, 3 ; |
537 | and cx, 3 ; |
538 | rep movsb ; |
538 | rep movsb ; |
539 | 539 | ||
540 | push eax |
540 | push eax |
541 | push [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
541 | push [edx + IPv4_FRAGMENT_entry.Owner] ; we need to remeber the owner, in case this is the last packet |
542 | push [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
542 | push [edx + IPv4_FRAGMENT_entry.NextPtr] ; Set edx to the next pointer |
543 | push edx ; Push pointer to fragment onto stack |
543 | push edx ; Push pointer to fragment onto stack |
544 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Next Fragment: 0x%x\n", edx |
544 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Next Fragment: 0x%x\n", edx |
545 | call net_buff_free ; free the previous fragment buffer (this uses the value from stack) |
545 | call net_buff_free ; free the previous fragment buffer (this uses the value from stack) |
546 | pop edx ebx eax |
546 | pop edx ebx eax |
547 | cmp edx, -1 ; Check if it is last fragment in chain |
547 | cmp edx, -1 ; Check if it is last fragment in chain |
548 | jne .rebuild_packet_loop |
548 | jne .rebuild_packet_loop |
549 | 549 | ||
550 | pop ecx |
550 | pop ecx |
551 | xchg cl, ch |
551 | xchg cl, ch |
552 | mov edx, eax |
552 | mov edx, eax |
553 | mov [edx + IPv4_header.TotalLength], cx |
553 | mov [edx + IPv4_header.TotalLength], cx |
554 | add esp, 12 |
554 | add esp, 12 |
555 | xchg cl, ch |
555 | xchg cl, ch |
556 | push ecx edx ; size and pointer |
556 | push ecx edx ; size and pointer |
557 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
557 | jmp .handle_it ; edx = buf ptr, ecx = size, [esp] buf ptr, [esp+4], total size, ebx=device ptr |
558 | 558 | ||
559 | .destroy_slot_pop: |
559 | .destroy_slot_pop: |
560 | add esp, 4 |
560 | add esp, 4 |
561 | .destroy_slot: |
561 | .destroy_slot: |
562 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destroy fragment slot!\n" |
562 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_input: Destroy fragment slot!\n" |
563 | ; TODO! |
563 | ; TODO! |
564 | jmp .dump |
564 | jmp .dump |
565 | 565 | ||
566 | 566 | ||
567 | 567 | ||
568 | 568 | ||
569 | 569 | ||
570 | ;-----------------------------------------------------------------; |
570 | ;-----------------------------------------------------------------; |
571 | ; ; |
571 | ; ; |
572 | ; ipv4_find_fragment_slot ; |
572 | ; ipv4_find_fragment_slot ; |
573 | ; ; |
573 | ; ; |
574 | ; IN: pointer to fragmented packet in edx ; |
574 | ; IN: pointer to fragmented packet in edx ; |
575 | ; ; |
575 | ; ; |
576 | ; OUT: pointer to slot in esi, -1 on error ; |
576 | ; OUT: pointer to slot in esi, -1 on error ; |
577 | ; ; |
577 | ; ; |
578 | ;-----------------------------------------------------------------; |
578 | ;-----------------------------------------------------------------; |
579 | align 4 |
579 | align 4 |
580 | ipv4_find_fragment_slot: |
580 | ipv4_find_fragment_slot: |
581 | 581 | ||
582 | ;;; TODO: the RFC says we should check protocol number too |
582 | ;;; TODO: the RFC says we should check protocol number too |
583 | 583 | ||
584 | push eax ebx ecx edx |
584 | push eax ebx ecx edx |
585 | mov ax, [edx + IPv4_header.Identification] |
585 | mov ax, [edx + IPv4_header.Identification] |
586 | mov ecx, IPv4_MAX_FRAGMENTS |
586 | mov ecx, IPv4_MAX_FRAGMENTS |
587 | mov esi, IPv4_FRAGMENT_LIST |
587 | mov esi, IPv4_FRAGMENT_LIST |
588 | mov ebx, [edx + IPv4_header.SourceAddress] |
588 | mov ebx, [edx + IPv4_header.SourceAddress] |
589 | mov edx, [edx + IPv4_header.DestinationAddress] |
589 | mov edx, [edx + IPv4_header.DestinationAddress] |
590 | .find_slot: |
590 | .find_slot: |
591 | cmp [esi + IPv4_FRAGMENT_slot.id], ax |
591 | cmp [esi + IPv4_FRAGMENT_slot.id], ax |
592 | jne .try_next |
592 | jne .try_next |
593 | cmp [esi + IPv4_FRAGMENT_slot.SrcIP], ebx |
593 | cmp [esi + IPv4_FRAGMENT_slot.SrcIP], ebx |
594 | jne .try_next |
594 | jne .try_next |
595 | cmp [esi + IPv4_FRAGMENT_slot.DstIP], edx |
595 | cmp [esi + IPv4_FRAGMENT_slot.DstIP], edx |
596 | je .found_slot |
596 | je .found_slot |
597 | .try_next: |
597 | .try_next: |
598 | add esi, sizeof.IPv4_FRAGMENT_slot |
598 | add esi, sizeof.IPv4_FRAGMENT_slot |
599 | loop .find_slot |
599 | loop .find_slot |
600 | 600 | ||
601 | or esi, -1 |
601 | or esi, -1 |
602 | .found_slot: |
602 | .found_slot: |
603 | pop edx ecx ebx eax |
603 | pop edx ecx ebx eax |
604 | ret |
604 | ret |
605 | 605 | ||
606 | 606 | ||
607 | ;------------------------------------------------------------------; |
607 | ;------------------------------------------------------------------; |
608 | ; ; |
608 | ; ; |
609 | ; ipv4_output ; |
609 | ; ipv4_output ; |
610 | ; ; |
610 | ; ; |
611 | ; IN: al = protocol ; |
611 | ; IN: al = protocol ; |
612 | ; ah = TTL ; |
612 | ; ah = TTL ; |
613 | ; ebx = device ptr (or 0 to let IP layer decide) ; |
613 | ; ebx = device ptr (or 0 to let IP layer decide) ; |
614 | ; ecx = data length ; |
614 | ; ecx = data length ; |
615 | ; edx = Source IP ; |
615 | ; edx = Source IP ; |
616 | ; edi = Destination IP ; |
616 | ; edi = Destination IP ; |
617 | ; ; |
617 | ; ; |
618 | ; OUT: eax = pointer to buffer start ; |
618 | ; OUT: eax = pointer to buffer start ; |
619 | ; eax = 0 on error ; |
619 | ; eax = 0 on error ; |
620 | ; ebx = device ptr (send packet through this device) ; |
620 | ; ebx = device ptr (send packet through this device) ; |
621 | ; ecx = data length ; |
621 | ; ecx = data length ; |
622 | ; edx = size of complete frame ; |
622 | ; edx = size of complete frame ; |
623 | ; edi = start of IPv4 payload ; |
623 | ; edi = start of IPv4 payload ; |
624 | ; ; |
624 | ; ; |
625 | ;------------------------------------------------------------------; |
625 | ;------------------------------------------------------------------; |
626 | align 4 |
626 | align 4 |
627 | ipv4_output: |
627 | ipv4_output: |
628 | 628 | ||
629 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: size=%u ip=0x%x\n", ecx, edi |
629 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: size=%u ip=0x%x\n", ecx, edi |
630 | 630 | ||
631 | cmp ecx, 65500 ; Max IPv4 packet size |
631 | cmp ecx, 65500 ; Max IPv4 packet size |
632 | ja .too_large |
632 | ja .too_large |
633 | 633 | ||
634 | push ecx ax edi |
634 | push ecx ax edi |
635 | mov eax, edi |
635 | mov eax, edi |
636 | call ipv4_route ; outputs device number in edi, dest ip in eax, source IP in edx |
636 | call ipv4_route ; outputs device number in edi, dest ip in eax, source IP in edx |
637 | test eax, eax |
637 | test eax, eax |
638 | jz .no_route |
638 | jz .no_route |
639 | push edx |
639 | push edx |
640 | test edi, edi |
640 | test edi, edi |
641 | jz .loopback |
641 | jz .loopback |
642 | 642 | ||
643 | call arp_ip_to_mac |
643 | call arp_ip_to_mac |
644 | test eax, 0xffff0000 ; error bits |
644 | test eax, 0xffff0000 ; error bits |
645 | jnz .arp_error |
645 | jnz .arp_error |
646 | push ebx ; push the mac onto the stack |
646 | push ebx ; push the mac onto the stack |
647 | push ax |
647 | push ax |
648 | 648 | ||
649 | inc [IPv4_packets_tx + edi] ; update stats |
649 | inc [IPv4_packets_tx + edi] ; update stats |
650 | 650 | ||
651 | mov ax, ETHER_PROTO_IPv4 |
651 | mov ax, ETHER_PROTO_IPv4 |
652 | mov ebx, [NET_DRV_LIST + edi] |
652 | mov ebx, [NET_DRV_LIST + edi] |
653 | mov ecx, [esp + 6 + 8 + 2] |
653 | mov ecx, [esp + 6 + 8 + 2] |
654 | add ecx, sizeof.IPv4_header |
654 | add ecx, sizeof.IPv4_header |
655 | mov edx, esp |
655 | mov edx, esp |
656 | call eth_output |
656 | call eth_output |
657 | jz .eth_error |
657 | jz .eth_error |
658 | add esp, 6 ; pop the mac out of the stack |
658 | add esp, 6 ; pop the mac out of the stack |
659 | 659 | ||
660 | .continue: |
660 | .continue: |
661 | xchg cl, ch ; internet byte order |
661 | xchg cl, ch ; internet byte order |
662 | mov [edi + IPv4_header.VersionAndIHL], 0x45 ; IPv4, normal length (no Optional header) |
662 | mov [edi + IPv4_header.VersionAndIHL], 0x45 ; IPv4, normal length (no Optional header) |
663 | mov [edi + IPv4_header.TypeOfService], 0 ; nothing special, just plain ip packet |
663 | mov [edi + IPv4_header.TypeOfService], 0 ; nothing special, just plain ip packet |
664 | mov [edi + IPv4_header.TotalLength], cx |
664 | mov [edi + IPv4_header.TotalLength], cx |
665 | mov [edi + IPv4_header.Identification], 0 ; fragment id: FIXME |
665 | mov [edi + IPv4_header.Identification], 0 ; fragment id: FIXME |
666 | mov [edi + IPv4_header.FlagsAndFragmentOffset], 0 |
666 | mov [edi + IPv4_header.FlagsAndFragmentOffset], 0 |
667 | 667 | ||
668 | mov [edi + IPv4_header.HeaderChecksum], 0 |
668 | mov [edi + IPv4_header.HeaderChecksum], 0 |
669 | popd [edi + IPv4_header.SourceAddress] |
669 | popd [edi + IPv4_header.SourceAddress] |
670 | popd [edi + IPv4_header.DestinationAddress] |
670 | popd [edi + IPv4_header.DestinationAddress] |
671 | 671 | ||
672 | pop word[edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
672 | pop word[edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
673 | ; [edi + IPv4_header.Protocol] |
673 | ; [edi + IPv4_header.Protocol] |
674 | 674 | ||
675 | pop ecx |
675 | pop ecx |
676 | 676 | ||
677 | ipv4_checksum edi |
677 | ipv4_checksum edi |
678 | add edi, sizeof.IPv4_header |
678 | add edi, sizeof.IPv4_header |
679 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: success!\n" |
679 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output: success!\n" |
680 | ret |
680 | ret |
681 | 681 | ||
682 | .eth_error: |
682 | .eth_error: |
683 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ethernet error\n" |
683 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ethernet error\n" |
684 | add esp, 3*4+2+6 |
684 | add esp, 3*4+2+6 |
685 | xor eax, eax |
685 | xor eax, eax |
686 | ret |
686 | ret |
687 | 687 | ||
688 | .no_route: |
688 | .no_route: |
689 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: No route to host!\n" |
689 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: No route to host!\n" |
690 | add esp, 2*4+2 |
690 | add esp, 2*4+2 |
691 | xor eax, eax |
691 | xor eax, eax |
692 | ret |
692 | ret |
693 | 693 | ||
694 | .arp_error: |
694 | .arp_error: |
695 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ARP error=%x\n", eax |
695 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ARP error=%x\n", eax |
696 | add esp, 4 |
696 | add esp, 4 |
697 | pop eax |
697 | pop eax |
698 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ip=0x%x\n", eax |
698 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: ip=0x%x\n", eax |
699 | add esp, 4+2 |
699 | add esp, 4+2 |
700 | xor eax, eax |
700 | xor eax, eax |
701 | ret |
701 | ret |
702 | 702 | ||
703 | .too_large: |
703 | .too_large: |
704 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: Packet too large!\n" |
704 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_output: Packet too large!\n" |
705 | xor eax, eax |
705 | xor eax, eax |
706 | ret |
706 | ret |
707 | 707 | ||
708 | .loopback: |
708 | .loopback: |
709 | mov dword [esp], eax ; set source IP to dest IP |
709 | mov dword [esp], eax ; set source IP to dest IP |
710 | mov ecx, [esp + 10] |
710 | mov ecx, [esp + 10] |
711 | add ecx, sizeof.IPv4_header |
711 | add ecx, sizeof.IPv4_header |
712 | mov edi, AF_INET4 |
712 | mov edi, AF_INET4 |
713 | call loop_output |
713 | call loop_output |
714 | jmp .continue |
714 | jmp .continue |
715 | 715 | ||
716 | 716 | ||
717 | 717 | ||
718 | 718 | ||
719 | ;------------------------------------------------------------------; |
719 | ;------------------------------------------------------------------; |
720 | ; ; |
720 | ; ; |
721 | ; ipv4_output_raw ; |
721 | ; ipv4_output_raw ; |
722 | ; ; |
722 | ; ; |
723 | ; IN: eax = socket ptr ; |
723 | ; IN: eax = socket ptr ; |
724 | ; ecx = data length ; |
724 | ; ecx = data length ; |
725 | ; esi = data ptr ; |
725 | ; esi = data ptr ; |
726 | ; ; |
726 | ; ; |
727 | ; OUT: eax = -1 on error ; |
727 | ; OUT: eax = -1 on error ; |
728 | ; ; |
728 | ; ; |
729 | ;------------------------------------------------------------------; |
729 | ;------------------------------------------------------------------; |
730 | align 4 |
730 | align 4 |
731 | ipv4_output_raw: |
731 | ipv4_output_raw: |
732 | 732 | ||
733 | DEBUGF 1,"IPv4_output_raw: size=%u ptr=%x socket=%x\n", ecx, esi, eax |
733 | DEBUGF 1,"IPv4_output_raw: size=%u ptr=%x socket=%x\n", ecx, esi, eax |
734 | 734 | ||
735 | sub esp, 8 |
735 | sub esp, 8 |
736 | push esi eax |
736 | push esi eax |
737 | 737 | ||
738 | call ipv4_route |
738 | call ipv4_route |
739 | call arp_ip_to_mac |
739 | call arp_ip_to_mac |
740 | 740 | ||
741 | test eax, 0xffff0000 ; error bits |
741 | test eax, 0xffff0000 ; error bits |
742 | jnz .arp_error |
742 | jnz .arp_error |
743 | 743 | ||
744 | push ebx ; push the mac |
744 | push ebx ; push the mac |
745 | push ax |
745 | push ax |
746 | 746 | ||
747 | inc [IPv4_packets_tx + 4*edi] |
747 | inc [IPv4_packets_tx + 4*edi] |
748 | mov ax, ETHER_PROTO_IPv4 |
748 | mov ax, ETHER_PROTO_IPv4 |
749 | mov ebx, [NET_DRV_LIST + 4*edi] |
749 | mov ebx, [NET_DRV_LIST + 4*edi] |
750 | mov ecx, [esp + 6 + 4] |
750 | mov ecx, [esp + 6 + 4] |
751 | add ecx, sizeof.IPv4_header |
751 | add ecx, sizeof.IPv4_header |
752 | mov edx, esp |
752 | mov edx, esp |
753 | call eth_output |
753 | call eth_output |
754 | jz .error |
754 | jz .error |
755 | add esp, 6 ; pop the mac |
755 | add esp, 6 ; pop the mac |
756 | 756 | ||
757 | mov dword[esp+4+4], edx |
757 | mov dword[esp+4+4], edx |
758 | mov dword[esp+4+4+4], eax |
758 | mov dword[esp+4+4+4], eax |
759 | 759 | ||
760 | pop eax esi |
760 | pop eax esi |
761 | ;; TODO: check socket options if we should add header, or just compute checksum |
761 | ;; TODO: check socket options if we should add header, or just compute checksum |
762 | 762 | ||
763 | push edi ecx |
763 | push edi ecx |
764 | rep movsb |
764 | rep movsb |
765 | pop ecx edi |
765 | pop ecx edi |
766 | 766 | ||
767 | ; [edi + IPv4_header.VersionAndIHL] ; IPv4, normal length (no Optional header) |
767 | ; [edi + IPv4_header.VersionAndIHL] ; IPv4, normal length (no Optional header) |
768 | ; [edi + IPv4_header.TypeOfService] ; nothing special, just plain ip packet |
768 | ; [edi + IPv4_header.TypeOfService] ; nothing special, just plain ip packet |
769 | ; [edi + IPv4_header.TotalLength] |
769 | ; [edi + IPv4_header.TotalLength] |
770 | ; [edi + IPv4_header.TotalLength] ; internet byte order |
770 | ; [edi + IPv4_header.TotalLength] ; internet byte order |
771 | ; [edi + IPv4_header.FlagsAndFragmentOffset] |
771 | ; [edi + IPv4_header.FlagsAndFragmentOffset] |
772 | 772 | ||
773 | mov [edi + IPv4_header.HeaderChecksum], 0 |
773 | mov [edi + IPv4_header.HeaderChecksum], 0 |
774 | 774 | ||
775 | ; [edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
775 | ; [edi + IPv4_header.TimeToLive] ; ttl shl 8 + protocol |
776 | ; [edi + IPv4_header.Protocol] |
776 | ; [edi + IPv4_header.Protocol] |
777 | ; [edi + IPv4_header.Identification] ; fragment id |
777 | ; [edi + IPv4_header.Identification] ; fragment id |
778 | ; [edi + IPv4_header.SourceAddress] |
778 | ; [edi + IPv4_header.SourceAddress] |
779 | ; [edi + IPv4_header.DestinationAddress] |
779 | ; [edi + IPv4_header.DestinationAddress] |
780 | 780 | ||
781 | ipv4_checksum edi ;;;; todo: checksum for IP packet with options! |
781 | ipv4_checksum edi ;;;; todo: checksum for IP packet with options! |
782 | add edi, sizeof.IPv4_header |
782 | add edi, sizeof.IPv4_header |
783 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output_raw: device=%x\n", ebx |
783 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_output_raw: device=%x\n", ebx |
784 | call [ebx + NET_DEVICE.transmit] |
784 | call [ebx + NET_DEVICE.transmit] |
785 | ret |
785 | ret |
786 | 786 | ||
787 | .error: |
787 | .error: |
788 | add esp, 6+8+4+4 |
788 | add esp, 6+8+4+4 |
789 | mov ebx, ENOBUFS ; FIXME: NOBUFS or MSGSIZE error |
789 | mov ebx, ENOBUFS ; FIXME: NOBUFS or MSGSIZE error |
790 | or eax, -1 |
790 | or eax, -1 |
791 | ret |
791 | ret |
792 | 792 | ||
793 | .arp_error: |
793 | .arp_error: |
794 | add esp, 8+4+4 |
794 | add esp, 8+4+4 |
795 | mov ebx, ENOTCONN |
795 | mov ebx, ENOTCONN |
796 | or eax, -1 |
796 | or eax, -1 |
797 | ret |
797 | ret |
798 | 798 | ||
799 | 799 | ||
800 | ;-----------------------------------------------------------------; |
800 | ;-----------------------------------------------------------------; |
801 | ; ; |
801 | ; ; |
802 | ; ipv4_fragment ; |
802 | ; ipv4_fragment ; |
803 | ; ; |
803 | ; ; |
804 | ; IN: [esp] = ptr to packet buffer to fragment ; |
804 | ; IN: [esp] = ptr to packet buffer to fragment ; |
805 | ; edi = ptrr to ip header in that buffer ; |
805 | ; edi = ptrr to ip header in that buffer ; |
806 | ; ebx = device ptr ; |
806 | ; ebx = device ptr ; |
807 | ; ; |
807 | ; ; |
808 | ; OUT: / ; |
808 | ; OUT: / ; |
809 | ; ; |
809 | ; ; |
810 | ;-----------------------------------------------------------------; |
810 | ;-----------------------------------------------------------------; |
811 | proc ipv4_fragment stdcall buffer |
811 | proc ipv4_fragment stdcall buffer |
812 | 812 | ||
813 | locals |
813 | locals |
814 | offset dd ? |
814 | offset dd ? |
815 | headerlength dd ? |
815 | headerlength dd ? |
816 | headerptr dd ? |
816 | headerptr dd ? |
817 | dataptr dd ? |
817 | dataptr dd ? |
818 | remaining dd ? |
818 | remaining dd ? |
819 | segmentsize dd ? |
819 | segmentsize dd ? |
820 | endl |
820 | endl |
821 | 821 | ||
822 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment\n" |
822 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_fragment\n" |
823 | 823 | ||
824 | ; We must be able to put at least 8 bytes per segment |
824 | ; We must be able to put at least 8 bytes per segment |
825 | movzx eax, byte[edi] ; IHL |
825 | movzx eax, byte[edi] ; IHL |
826 | and eax, 0xf |
826 | and eax, 0xf |
827 | shl eax, 2 |
827 | shl eax, 2 |
828 | mov [headerlength], eax |
828 | mov [headerlength], eax |
829 | add eax, 8 |
829 | add eax, 8 |
830 | mov ecx, [ebx + NET_DEVICE.mtu] |
830 | mov ecx, [ebx + NET_DEVICE.mtu] |
831 | and ecx, not 11b |
831 | and ecx, not 11b |
832 | cmp ecx, eax |
832 | cmp ecx, eax |
833 | jb .fail |
833 | jb .fail |
834 | 834 | ||
835 | mov [edi + IPv4_header.HeaderChecksum], 0 |
835 | mov [edi + IPv4_header.HeaderChecksum], 0 |
836 | 836 | ||
837 | mov [segmentsize], ecx |
837 | mov [segmentsize], ecx |
838 | mov [headerptr], edi |
838 | mov [headerptr], edi |
839 | movzx ecx, [edi + IPv4_header.TotalLength] |
839 | movzx ecx, [edi + IPv4_header.TotalLength] |
840 | xchg cl, ch |
840 | xchg cl, ch |
841 | sub ecx, [headerlength] |
841 | sub ecx, [headerlength] |
842 | mov [remaining], ecx |
842 | mov [remaining], ecx |
843 | mov [offset], 0 |
843 | mov [offset], 0 |
844 | 844 | ||
845 | add edi, [headerlength] |
845 | add edi, [headerlength] |
846 | mov [dataptr], edi |
846 | mov [dataptr], edi |
847 | 847 | ||
848 | .loop: |
848 | .loop: |
849 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: new fragment" |
849 | DEBUGF DEBUG_NETWORK_VERBOSE, "Ipv4_fragment: new fragment" |
850 | 850 | ||
851 | mov ecx, [segmentsize] |
851 | mov ecx, [segmentsize] |
852 | cmp ecx, [remaining] |
852 | cmp ecx, [remaining] |
853 | jbe @f |
853 | jbe @f |
854 | mov ecx, [remaining] |
854 | mov ecx, [remaining] |
855 | @@: |
855 | @@: |
856 | 856 | ||
857 | mov ax, ETHER_PROTO_IPv4 |
857 | mov ax, ETHER_PROTO_IPv4 |
858 | mov edx, [esp] |
858 | mov edx, [esp] |
859 | add edx, [edx + NET_BUFF.offset] |
859 | add edx, [edx + NET_BUFF.offset] |
860 | ; add edx, ETH_header.DstMAC ; = 0 |
860 | ; add edx, ETH_header.DstMAC ; = 0 |
861 | call ETH_output |
861 | call ETH_output |
862 | jz .fail |
862 | jz .fail |
863 | 863 | ||
864 | push edi |
864 | push edi |
865 | mov edx, ecx |
865 | mov edx, ecx |
866 | 866 | ||
867 | ; copy header |
867 | ; copy header |
868 | mov esi, [headerptr] |
868 | mov esi, [headerptr] |
869 | mov ecx, [headerlength] |
869 | mov ecx, [headerlength] |
870 | shr ecx, 2 |
870 | shr ecx, 2 |
871 | rep movsd |
871 | rep movsd |
872 | 872 | ||
873 | ; copy data |
873 | ; copy data |
874 | mov esi, [dataptr] |
874 | mov esi, [dataptr] |
875 | add esi, [offset] |
875 | add esi, [offset] |
876 | mov ecx, edx |
876 | mov ecx, edx |
877 | sub ecx, [headerlength] |
877 | sub ecx, [headerlength] |
878 | shr ecx, 2 |
878 | shr ecx, 2 |
879 | rep movsd |
879 | rep movsd |
880 | pop edi |
880 | pop edi |
881 | 881 | ||
882 | ; now, correct header |
882 | ; now, correct header |
883 | ; packet length |
883 | ; packet length |
884 | mov ax, dx |
884 | mov ax, dx |
885 | xchg al, ah |
885 | xchg al, ah |
886 | mov [edi + IPv4_header.TotalLength], ax |
886 | mov [edi + IPv4_header.TotalLength], ax |
887 | 887 | ||
888 | ; offset |
888 | ; offset |
889 | mov eax, [offset] |
889 | mov eax, [offset] |
890 | xchg al, ah |
890 | xchg al, ah |
891 | 891 | ||
892 | sub edx, [headerlength] |
892 | sub edx, [headerlength] |
893 | sub [remaining], edx |
893 | sub [remaining], edx |
894 | je @f |
894 | je @f |
895 | jb .fail |
895 | jb .fail |
896 | or ah, 1 shl 2 ; more fragments |
896 | or ah, 1 shl 2 ; more fragments |
897 | add [offset], edx |
897 | add [offset], edx |
898 | @@: |
898 | @@: |
899 | mov [edi + IPv4_header.FlagsAndFragmentOffset], ax |
899 | mov [edi + IPv4_header.FlagsAndFragmentOffset], ax |
900 | 900 | ||
901 | ; Send the fragment |
901 | ; Send the fragment |
902 | IPv4_checksum edi |
902 | IPv4_checksum edi |
903 | call [ebx + NET_DEVICE.transmit] |
903 | call [ebx + NET_DEVICE.transmit] |
904 | 904 | ||
905 | cmp [remaining], 0 |
905 | cmp [remaining], 0 |
906 | jne .loop |
906 | jne .loop |
907 | 907 | ||
908 | call NET_BUFF_free |
908 | call NET_BUFF_free |
909 | ret |
909 | ret |
910 | 910 | ||
911 | .fail: |
911 | .fail: |
912 | DEBUGF DEBUG_NETWORK_ERROR, "Ipv4_fragment: failed\n" |
912 | DEBUGF DEBUG_NETWORK_ERROR, "Ipv4_fragment: failed\n" |
913 | call NET_BUFF_free |
913 | call NET_BUFF_free |
914 | ret |
914 | ret |
915 | 915 | ||
916 | endp |
916 | endp |
917 | 917 | ||
918 | 918 | ||
919 | 919 | ||
920 | ;-----------------------------------------------------------------; |
920 | ;-----------------------------------------------------------------; |
921 | ; ; |
921 | ; ; |
922 | ; ipv4_route ; |
922 | ; ipv4_route ; |
923 | ; ; |
923 | ; ; |
924 | ; IN: eax = Destination IP ; |
924 | ; IN: eax = Destination IP ; |
925 | ; ebx = outgoing device / 0 ; |
925 | ; ebx = outgoing device / 0 ; |
926 | ; edx = Source IP ; |
926 | ; edx = Source IP ; |
927 | ; ; |
927 | ; ; |
928 | ; OUT: eax = Destination IP (may be gateway), 0 on error ; |
928 | ; OUT: eax = Destination IP (may be gateway), 0 on error ; |
929 | ; edx = Source IP ; |
929 | ; edx = Source IP ; |
930 | ; edi = device number*4 ; |
930 | ; edi = device number*4 ; |
931 | ; ; |
931 | ; ; |
932 | ; DESTROYED: ; |
932 | ; DESTROYED: ; |
933 | ; ecx ; |
933 | ; ecx ; |
934 | ; ; |
934 | ; ; |
935 | ;-----------------------------------------------------------------; |
935 | ;-----------------------------------------------------------------; |
936 | align 4 |
936 | align 4 |
937 | ipv4_route: |
937 | ipv4_route: |
938 | 938 | ||
939 | test ebx, ebx |
939 | test ebx, ebx |
940 | jnz .got_device |
940 | jnz .got_device |
941 | 941 | ||
942 | ; Broadcast does not need gateway |
942 | ; Broadcast does not need gateway |
943 | cmp eax, 0xffffffff |
943 | cmp eax, 0xffffffff |
944 | je .broadcast |
944 | je .broadcast |
945 | 945 | ||
946 | xor edi, edi |
946 | xor edi, edi |
947 | .loop: |
947 | .loop: |
948 | mov ebx, [IP_LIST + edi] |
948 | mov ebx, [IP_LIST + edi] |
949 | and ebx, [SUBNET_LIST + edi] |
949 | and ebx, [SUBNET_LIST + edi] |
950 | jz .next |
950 | jz .next |
951 | mov ecx, eax |
951 | mov ecx, eax |
952 | and ecx, [SUBNET_LIST + edi] |
952 | and ecx, [SUBNET_LIST + edi] |
953 | cmp ebx, ecx |
953 | cmp ebx, ecx |
954 | je .got_it |
954 | je .got_it |
955 | .next: |
955 | .next: |
956 | add edi, 4 |
956 | add edi, 4 |
957 | cmp edi, 4*NET_DEVICES_MAX |
957 | cmp edi, 4*NET_DEVICES_MAX |
958 | jb .loop |
958 | jb .loop |
959 | 959 | ||
960 | mov eax, [GATEWAY_LIST + 4] ; TODO: let user (or a user space daemon) configure default route |
960 | mov eax, [GATEWAY_LIST + 4] ; TODO: let user (or a user space daemon) configure default route |
961 | .broadcast: |
961 | .broadcast: |
962 | mov edi, 4 ; TODO: same as above |
962 | mov edi, 4 ; TODO: same as above |
963 | .got_it: |
963 | .got_it: |
964 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
964 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
965 | test edx, edx |
965 | test edx, edx |
966 | jnz @f |
966 | jnz @f |
967 | mov edx, [IP_LIST + edi] |
967 | mov edx, [IP_LIST + edi] |
968 | @@: |
968 | @@: |
969 | 969 | ||
970 | ret |
970 | ret |
971 | 971 | ||
972 | .got_device: |
972 | .got_device: |
973 | ; Validate device ptr and convert to device number |
973 | ; Validate device ptr and convert to device number |
974 | call net_ptr_to_num4 |
974 | call net_ptr_to_num4 |
975 | cmp edi, -1 |
975 | cmp edi, -1 |
976 | je .fail |
976 | je .fail |
977 | 977 | ||
978 | mov edx, [IP_LIST + edi] ; Source IP |
978 | mov edx, [IP_LIST + edi] ; Source IP |
979 | 979 | ||
980 | ; Broadcast does not need gateway |
980 | ; Broadcast does not need gateway |
981 | cmp eax, 0xffffffff |
981 | cmp eax, 0xffffffff |
982 | je @f |
982 | je @f |
983 | 983 | ||
984 | ; Check if we should route to gateway or not |
984 | ; Check if we should route to gateway or not |
985 | mov ebx, [IP_LIST + edi] |
985 | mov ebx, [IP_LIST + edi] |
986 | and ebx, [SUBNET_LIST + edi] |
986 | and ebx, [SUBNET_LIST + edi] |
987 | mov ecx, eax |
987 | mov ecx, eax |
988 | and ecx, [SUBNET_LIST + edi] |
988 | and ecx, [SUBNET_LIST + edi] |
989 | cmp ecx, ebx |
989 | cmp ecx, ebx |
990 | je @f |
990 | je @f |
991 | mov eax, [GATEWAY_LIST + edi] |
991 | mov eax, [GATEWAY_LIST + edi] |
992 | @@: |
992 | @@: |
993 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
993 | DEBUGF DEBUG_NETWORK_VERBOSE, "IPv4_route: %u\n", edi |
994 | ret |
994 | ret |
995 | 995 | ||
996 | .fail: |
996 | .fail: |
997 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_route failed\n" |
997 | DEBUGF DEBUG_NETWORK_ERROR, "IPv4_route failed\n" |
998 | xor eax, eax |
998 | xor eax, eax |
999 | ret |
999 | ret |
1000 | 1000 | ||
1001 | 1001 | ||
1002 | 1002 | ||
1003 | ;-----------------------------------------------------------------; |
1003 | ;-----------------------------------------------------------------; |
1004 | ; ; |
1004 | ; ; |
1005 | ; ipv4_get_frgmnt_num ; |
1005 | ; ipv4_get_frgmnt_num ; |
1006 | ; ; |
1006 | ; ; |
1007 | ; IN: / ; |
1007 | ; IN: / ; |
1008 | ; ; |
1008 | ; ; |
1009 | ; OUT: ax = fragment number ; |
1009 | ; OUT: ax = fragment number ; |
1010 | ; ; |
1010 | ; ; |
1011 | ;-----------------------------------------------------------------; |
1011 | ;-----------------------------------------------------------------; |
1012 | align 4 |
1012 | align 4 |
1013 | ipv4_get_frgmnt_num: |
1013 | ipv4_get_frgmnt_num: |
1014 | xor ax, ax ;;; TODO: replace this with real code |
1014 | xor ax, ax ;;; TODO: replace this with real code |
1015 | 1015 | ||
1016 | ret |
1016 | ret |
1017 | 1017 | ||
1018 | 1018 | ||
1019 | ;-----------------------------------------------------------------; |
1019 | ;-----------------------------------------------------------------; |
1020 | ; ; |
1020 | ; ; |
1021 | ; ipv4_connect ; |
1021 | ; ipv4_connect ; |
1022 | ; ; |
1022 | ; ; |
1023 | ; IN: eax = socket pointer ; |
1023 | ; IN: eax = socket pointer ; |
1024 | ; ; |
1024 | ; ; |
1025 | ; OUT: eax = 0 on success ; |
1025 | ; OUT: eax = 0 on success ; |
1026 | ; eax = -1 on error ; |
1026 | ; eax = -1 on error ; |
1027 | ; ebx = error code on error ; |
1027 | ; ebx = error code on error ; |
1028 | ; ; |
1028 | ; ; |
1029 | ;-----------------------------------------------------------------; |
1029 | ;-----------------------------------------------------------------; |
1030 | align 4 |
1030 | align 4 |
1031 | ipv4_connect: |
1031 | ipv4_connect: |
1032 | 1032 | ||
1033 | push eax edx |
1033 | push eax edx |
1034 | lea ecx, [eax + SOCKET.mutex] |
1034 | lea ecx, [eax + SOCKET.mutex] |
1035 | call mutex_lock |
1035 | call mutex_lock |
1036 | pop edx eax |
1036 | pop edx eax |
1037 | 1037 | ||
1038 | ; Fill in local IP |
1038 | ; Fill in local IP |
1039 | cmp [eax + IP_SOCKET.LocalIP], 0 |
1039 | cmp [eax + IP_SOCKET.LocalIP], 0 |
1040 | jne @f |
1040 | jne @f |
1041 | push [IP_LIST + 4] ; FIXME: use correct local IP |
1041 | push [IP_LIST + 4] ; FIXME: use correct local IP |
1042 | pop [eax + IP_SOCKET.LocalIP] |
1042 | pop [eax + IP_SOCKET.LocalIP] |
1043 | 1043 | ||
1044 | ; Fill in remote IP |
1044 | ; Fill in remote IP |
1045 | pushd [edx + 4] |
1045 | pushd [edx + 4] |
1046 | pop [eax + IP_SOCKET.RemoteIP] |
1046 | pop [eax + IP_SOCKET.RemoteIP] |
1047 | 1047 | ||
1048 | lea ecx, [eax + SOCKET.mutex] |
1048 | lea ecx, [eax + SOCKET.mutex] |
1049 | call mutex_unlock |
1049 | call mutex_unlock |
1050 | 1050 | ||
1051 | xor eax, eax |
1051 | xor eax, eax |
1052 | ret |
1052 | ret |
1053 | 1053 | ||
1054 | 1054 | ||
1055 | ;-----------------------------------------------------------------; |
1055 | ;-----------------------------------------------------------------; |
1056 | ; ; |
1056 | ; ; |
1057 | ; ipv4_API: Part of system function 76. ; |
1057 | ; ipv4_API: Part of system function 76. ; |
1058 | ; ; |
1058 | ; ; |
1059 | ; IN: bl = subfunction number ; |
1059 | ; IN: bl = subfunction number ; |
1060 | ; bh = device number ; |
1060 | ; bh = device number ; |
1061 | ; ecx, edx, .. depends on subfunction ; |
1061 | ; ecx, edx, .. depends on subfunction ; |
1062 | ; ; |
1062 | ; ; |
1063 | ; OUT: depends on subfunction ; |
1063 | ; OUT: depends on subfunction ; |
1064 | ; ; |
1064 | ; ; |
1065 | ;-----------------------------------------------------------------; |
1065 | ;-----------------------------------------------------------------; |
1066 | align 4 |
1066 | align 4 |
1067 | ipv4_api: |
1067 | ipv4_api: |
1068 | 1068 | ||
1069 | movzx eax, bh |
1069 | movzx eax, bh |
1070 | shl eax, 2 |
1070 | shl eax, 2 |
1071 | 1071 | ||
1072 | and ebx, 0x000000ff |
1072 | and ebx, 0x000000ff |
1073 | cmp ebx, .number |
1073 | cmp ebx, .number |
1074 | ja .error |
1074 | ja .error |
1075 | jmp dword [.table + 4*ebx] |
1075 | jmp dword [.table + 4*ebx] |
1076 | 1076 | ||
1077 | .table: |
1077 | .table: |
1078 | dd .packets_tx ; 0 |
1078 | dd .packets_tx ; 0 |
1079 | dd .packets_rx ; 1 |
1079 | dd .packets_rx ; 1 |
1080 | dd .read_ip ; 2 |
1080 | dd .read_ip ; 2 |
1081 | dd .write_ip ; 3 |
1081 | dd .write_ip ; 3 |
1082 | dd .read_dns ; 4 |
1082 | dd .read_dns ; 4 |
1083 | dd .write_dns ; 5 |
1083 | dd .write_dns ; 5 |
1084 | dd .read_subnet ; 6 |
1084 | dd .read_subnet ; 6 |
1085 | dd .write_subnet ; 7 |
1085 | dd .write_subnet ; 7 |
1086 | dd .read_gateway ; 8 |
1086 | dd .read_gateway ; 8 |
1087 | dd .write_gateway ; 9 |
1087 | dd .write_gateway ; 9 |
1088 | .number = ($ - .table) / 4 - 1 |
1088 | .number = ($ - .table) / 4 - 1 |
1089 | 1089 | ||
1090 | .error: |
1090 | .error: |
1091 | mov eax, -1 |
1091 | mov eax, -1 |
1092 | ret |
1092 | ret |
1093 | 1093 | ||
1094 | .packets_tx: |
1094 | .packets_tx: |
1095 | mov eax, [IPv4_packets_tx + eax] |
1095 | mov eax, [IPv4_packets_tx + eax] |
1096 | ret |
1096 | ret |
1097 | 1097 | ||
1098 | .packets_rx: |
1098 | .packets_rx: |
1099 | mov eax, [IPv4_packets_rx + eax] |
1099 | mov eax, [IPv4_packets_rx + eax] |
1100 | ret |
1100 | ret |
1101 | 1101 | ||
1102 | .read_ip: |
1102 | .read_ip: |
1103 | mov eax, [IP_LIST + eax] |
1103 | mov eax, [IP_LIST + eax] |
1104 | ret |
1104 | ret |
1105 | 1105 | ||
1106 | .write_ip: |
1106 | .write_ip: |
1107 | mov [IP_LIST + eax], ecx |
1107 | mov [IP_LIST + eax], ecx |
1108 | mov edi, eax ; device number, we'll need it for ARP |
1108 | mov edi, eax ; device number, we'll need it for ARP |
1109 | 1109 | ||
1110 | ; pre-calculate the local broadcast address |
1110 | ; pre-calculate the local broadcast address |
1111 | mov ebx, [SUBNET_LIST + eax] |
1111 | mov ebx, [SUBNET_LIST + eax] |
1112 | not ebx |
1112 | not ebx |
1113 | or ebx, ecx |
1113 | or ebx, ecx |
1114 | mov [BROADCAST_LIST + eax], ebx |
1114 | mov [BROADCAST_LIST + eax], ebx |
1115 | 1115 | ||
1116 | mov ebx, [NET_DRV_LIST + eax] |
1116 | mov ebx, [NET_DRV_LIST + eax] |
1117 | mov eax, [IP_LIST + eax] |
1117 | mov eax, [IP_LIST + eax] |
1118 | call arp_output_request ; now send a gratuitous ARP |
1118 | call arp_output_request ; now send a gratuitous ARP |
1119 | 1119 | ||
1120 | call net_send_event |
1120 | call net_send_event |
1121 | xor eax, eax |
1121 | xor eax, eax |
1122 | ret |
1122 | ret |
1123 | 1123 | ||
1124 | .read_dns: |
1124 | .read_dns: |
1125 | mov eax, [DNS_LIST + eax] |
1125 | mov eax, [DNS_LIST + eax] |
1126 | ret |
1126 | ret |
1127 | 1127 | ||
1128 | .write_dns: |
1128 | .write_dns: |
1129 | mov [DNS_LIST + eax], ecx |
1129 | mov [DNS_LIST + eax], ecx |
1130 | call net_send_event |
1130 | call net_send_event |
1131 | xor eax, eax |
1131 | xor eax, eax |
1132 | ret |
1132 | ret |
1133 | 1133 | ||
1134 | .read_subnet: |
1134 | .read_subnet: |
1135 | mov eax, [SUBNET_LIST + eax] |
1135 | mov eax, [SUBNET_LIST + eax] |
1136 | ret |
1136 | ret |
1137 | 1137 | ||
1138 | .write_subnet: |
1138 | .write_subnet: |
1139 | mov [SUBNET_LIST + eax], ecx |
1139 | mov [SUBNET_LIST + eax], ecx |
1140 | 1140 | ||
1141 | ; pre-calculate the local broadcast address |
1141 | ; pre-calculate the local broadcast address |
1142 | mov ebx, [IP_LIST + eax] |
1142 | mov ebx, [IP_LIST + eax] |
1143 | not ecx |
1143 | not ecx |
1144 | or ecx, ebx |
1144 | or ecx, ebx |
1145 | mov [BROADCAST_LIST + eax], ecx |
1145 | mov [BROADCAST_LIST + eax], ecx |
1146 | 1146 | ||
1147 | call net_send_event |
1147 | call net_send_event |
1148 | xor eax, eax |
1148 | xor eax, eax |
1149 | ret |
1149 | ret |
1150 | 1150 | ||
1151 | .read_gateway: |
1151 | .read_gateway: |
1152 | mov eax, [GATEWAY_LIST + eax] |
1152 | mov eax, [GATEWAY_LIST + eax] |
1153 | ret |
1153 | ret |
1154 | 1154 | ||
1155 | .write_gateway: |
1155 | .write_gateway: |
1156 | mov [GATEWAY_LIST + eax], ecx |
1156 | mov [GATEWAY_LIST + eax], ecx |
1157 | 1157 | ||
1158 | call net_send_event |
1158 | call net_send_event |
1159 | xor eax, eax |
1159 | xor eax, eax |
1160 | ret |
1160 | ret |