IPv4.inc File Reference

Classes
struct	IPv4_header
struct	IPv4_FRAGMENT_slot
struct	IPv4_FRAGMENT_entry
	This structure will replace the ethernet header in fragmented ip packets. More...

Macros
#define	ipv4_init
	--------------------------------------------------------------—; ; ipv4_init: Resets all IPv4 variables ; ; --------------------------------------------------------------—; More...
#define	ipv4_decrease_fragment_ttls
	--------------------------------------------------------------—; ; Decrease TimeToLive of all fragment slots ; ; --------------------------------------------------------------—; More...
#define	ipv4_checksum(ptr)

Functions
void	ipv4_fragment (arg_t buffer)
	--------------------------------------------------------------—; ; ipv4_fragment ; ; IN: [esp] = ptr to packet buffer to fragment ; edi = ptrr to ip header in that buffer ; ebx = device ptr ; ; OUT: / ; ; --------------------------------------------------------------—; More...

Variables
rd	IPv4_address
rd	IPv4_subnet
rd	IPv4_nameserver
rd	IPv4_gateway
rd	IPv4_broadcast
rd	IPv4_packets_tx
rd	IPv4_packets_rx
rd	IPv4_packets_dumped
rb	IPv4_fragments
label	ipv4_input
	--------------------------------------------------------------—; ; ipv4_input: Check if IPv4 Packet isnt damaged and call ; appropriate handler. (TCP/UDP/ICMP/..) ; We will also re-construct fragmented packets. ; ; IN: Pointer to buffer in [esp] ; pointer to device struct in ebx ; pointer to IPv4 header in edx ; size of IPv4 packet in ecx ; ; OUT: / ; ; --------------------------------------------------------------—; More...
label	ipv4_find_fragment_slot
	--------------------------------------------------------------—; ; ipv4_find_fragment_slot ; ; IN: pointer to fragmented packet in edx ; ; OUT: pointer to slot in esi, -1 on error ; ; --------------------------------------------------------------—; More...
label	ipv4_output
	---------------------------------------------------------------—; ; ipv4_output ; ; IN: al = protocol ; ah = TTL ; ebx = device ptr (or 0 to let IP layer decide) ; ecx = data length ; edx = Source IP ; edi = Destination IP ; ; OUT: eax = pointer to buffer start ; eax = 0 on error ; ebx = device ptr (send packet through this device) ; ecx = data length ; edx = size of complete frame ; edi = start of IPv4 payload ; ; ---------------------------------------------------------------—; More...
label	ipv4_output_raw
	---------------------------------------------------------------—; ; ipv4_output_raw ; ; IN: eax = socket ptr ; ecx = data length ; esi = data ptr ; ; OUT: eax = -1 on error ; ; ---------------------------------------------------------------—; More...
dd	offset
dd	headerlength
dd	headerptr
dd	dataptr
dd	remaining
dd	segmentsize
edi	IPv4_checksum
	Send the fragment. More...
label	ipv4_route
	--------------------------------------------------------------—; ; ipv4_route ; ; IN: eax = Destination IP ; ebx = outgoing device / 0 ; edx = Source IP ; ; OUT: eax = Destination IP (may be gateway), 0 on error ; edx = Source IP ; edi = device number*4 ; ; DESTROYED: ; ecx ; ; --------------------------------------------------------------—; More...
label	ipv4_get_frgmnt_num
	--------------------------------------------------------------—; ; ipv4_get_frgmnt_num ; ; IN: / ; ; OUT: ax = fragment number ; ; --------------------------------------------------------------—; More...
label	ipv4_connect
	--------------------------------------------------------------—; ; ipv4_connect ; ; IN: eax = socket pointer ; ; OUT: eax = 0 on success ; eax = -1 on error ; ebx = error code on error ; ; --------------------------------------------------------------—; More...
label	ipv4_api
	--------------------------------------------------------------—; ; ipv4_API: Part of system function 76. ; ; IN: bl = subfunction number ; bh = device number ; ecx, edx, .. depends on subfunction ; ; OUT: depends on subfunction ; ; --------------------------------------------------------------—; More...

Macro Definition Documentation

ipv4_checksum

#define ipv4_checksum

(

ptr

)

Source

network/IPv4.inc:141

ipv4_decrease_fragment_ttls

#define ipv4_decrease_fragment_ttls

--------------------------------------------------------------—; ; Decrease TimeToLive of all fragment slots ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:114

ipv4_init

#define ipv4_init

--------------------------------------------------------------—; ; ipv4_init: Resets all IPv4 variables ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:99

Function Documentation

ipv4_fragment()

void ipv4_fragment

(

arg_t

buffer

)

--------------------------------------------------------------—; ; ipv4_fragment ; ; IN: [esp] = ptr to packet buffer to fragment ; edi = ptrr to ip header in that buffer ; ebx = device ptr ; ; OUT: / ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:833

Variable Documentation

dataptr

dd dataptr

Initial value

?

Source

network/IPv4.inc:839

headerlength

dd headerlength

Initial value

?

Source

network/IPv4.inc:837

headerptr

dd headerptr

Initial value

?

Source

network/IPv4.inc:838

IPv4_address

rd IPv4_address

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:77

ipv4_api

label ipv4_api

--------------------------------------------------------------—; ; ipv4_API: Part of system function 76. ; ; IN: bl = subfunction number ; bh = device number ; ecx, edx, .. depends on subfunction ; ; OUT: depends on subfunction ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:1089

IPv4_broadcast

rd IPv4_broadcast

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:81

IPv4_checksum

edi IPv4_checksum

Send the fragment.

Initial value

Source

network/IPv4.inc:924

ipv4_connect

label ipv4_connect

--------------------------------------------------------------—; ; ipv4_connect ; ; IN: eax = socket pointer ; ; OUT: eax = 0 on success ; eax = -1 on error ; ebx = error code on error ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:1053

ipv4_find_fragment_slot

label ipv4_find_fragment_slot

--------------------------------------------------------------—; ; ipv4_find_fragment_slot ; ; IN: pointer to fragmented packet in edx ; ; OUT: pointer to slot in esi, -1 on error ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:600

IPv4_fragments

rb IPv4_fragments

Initial value

IPv4_MAX_FRAGMENTS * sizeof.IPv4_FRAGMENT_slot

Source

network/IPv4.inc:87

IPv4_gateway

rd IPv4_gateway

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:80

ipv4_get_frgmnt_num

label ipv4_get_frgmnt_num

--------------------------------------------------------------—; ; ipv4_get_frgmnt_num ; ; IN: / ; ; OUT: ax = fragment number ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:1035

ipv4_input

label ipv4_input

--------------------------------------------------------------—; ; ipv4_input: Check if IPv4 Packet isnt damaged and call ; appropriate handler. (TCP/UDP/ICMP/..) ; We will also re-construct fragmented packets. ; ; IN: Pointer to buffer in [esp] ; pointer to device struct in ebx ; pointer to IPv4 header in edx ; size of IPv4 packet in ecx ; ; OUT: / ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:220

IPv4_nameserver

rd IPv4_nameserver

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:79

ipv4_output

label ipv4_output

---------------------------------------------------------------—; ; ipv4_output ; ; IN: al = protocol ; ah = TTL ; ebx = device ptr (or 0 to let IP layer decide) ; ecx = data length ; edx = Source IP ; edi = Destination IP ; ; OUT: eax = pointer to buffer start ; eax = 0 on error ; ebx = device ptr (send packet through this device) ; ecx = data length ; edx = size of complete frame ; edi = start of IPv4 payload ; ; ---------------------------------------------------------------—;

Source

network/IPv4.inc:647

ipv4_output_raw

label ipv4_output_raw

---------------------------------------------------------------—; ; ipv4_output_raw ; ; IN: eax = socket ptr ; ecx = data length ; esi = data ptr ; ; OUT: eax = -1 on error ; ; ---------------------------------------------------------------—;

Source

network/IPv4.inc:753

IPv4_packets_dumped

rd IPv4_packets_dumped

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:85

IPv4_packets_rx

rd IPv4_packets_rx

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:84

IPv4_packets_tx

rd IPv4_packets_tx

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:83

ipv4_route

label ipv4_route

--------------------------------------------------------------—; ; ipv4_route ; ; IN: eax = Destination IP ; ebx = outgoing device / 0 ; edx = Source IP ; ; OUT: eax = Destination IP (may be gateway), 0 on error ; edx = Source IP ; edi = device number*4 ; ; DESTROYED: ; ecx ; ; --------------------------------------------------------------—;

Source

network/IPv4.inc:959

IPv4_subnet

rd IPv4_subnet

Initial value

NET_DEVICES_MAX

Source

network/IPv4.inc:78

offset

dd offset

Initial value

?

Source

network/IPv4.inc:836

remaining

dd remaining

Initial value

?

Source

network/IPv4.inc:840

segmentsize

dd segmentsize

Initial value

?

Source

network/IPv4.inc:841