git-svn-id: http://svn.code.sf.net/p/netboot65/code@297 93682198-c243-4bdb-bd91-e943c89aac3b

This commit is contained in:
jonnosan 2011-01-01 23:51:12 +00:00
parent 4d2c327951
commit aefe04e673

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@ -1,268 +0,0 @@
;UDP (user datagram protocol) functions
.include "../inc/common.i"
.ifndef KPR_API_VERSION_NUMBER
.define EQU =
.include "../inc/kipper_constants.i"
.endif
;.import dbg_dump_udp_header
.import ip65_error
.export udp_init
.export udp_process
.export udp_add_listener
.export udp_remove_listener
.export udp_send
.export udp_callback
.export udp_inp
.export udp_outp
.import eth_inp
.import eth_outp
.exportzp udp_src_port
.exportzp udp_dest_port
.exportzp udp_len
.exportzp udp_cksum
.exportzp udp_data
.export udp_send_dest
.export udp_send_src_port
.export udp_send_dest_port
.export udp_send_len
.import copymem
.importzp copy_src
.importzp copy_dest
.import cfg_ip
.data
udp_cbtmp: jmp $ffff ; temporary vector - gets filled in later
.bss
; argument for udp_add_listener
udp_callback: .res 2 ;vector to routine to be called when a udp packet arrives
; arguments for udp_send
udp_send_dest: .res 4 ;set to ip address that udp packet will be sent to
udp_send_src_port: .res 2 ;set to port that udp packet will be sent from
udp_send_dest_port: .res 2 ;set to port that udp packet will be sent to
udp_send_len: .res 2 ;set to length of data to be sent in udp packet (excluding ethernet,ip & udp headers)
; udp listener callbacks
udp_cbmax = 4
udp_cbveclo: .res udp_cbmax ; table of listener vectors (lsb)
udp_cbvechi: .res udp_cbmax ; table of listener vectors (msb)
udp_cbportlo: .res udp_cbmax ; table of ports (lsb)
udp_cbporthi: .res udp_cbmax ; table of ports (msb)
udp_cbcount: .res 1 ; number of active listeners
; udp packet offsets
udp_inp = eth_inp
udp_outp = eth_outp
udp_src_port = 0 ;offset of source port field in udp packet
udp_dest_port = 2 ;offset of destination port field in udp packet
udp_len = 4 ;offset of length field in udp packet
udp_cksum = 6 ;offset of checksum field in udp packet
udp_data = 8 ;offset of data in udp packet
; virtual header
udp_vh = udp_outp - 12
udp_vh_src = 0
udp_vh_dest = 4
udp_vh_zero = 8
udp_vh_proto = 9
udp_vh_len = 10
; temp for port comparison
port: .res 2
.code
; initialize udp
; inputs: none
; outputs: none
udp_init:
lda #0
sta udp_cbcount
rts
;process incoming udp packet
;inputs:
; eth_inp: should contain an ethernet frame encapsulating an inbound udp packet
;outputs:
; carry flag set if any error occured (including if no handler for specified port
; was found)
; carry flag clear if no error
; if handler was found, an outbound message may be created, overwriting eth_outp
udp_process:
lda udp_cbcount ; any installed udp listeners?
beq @drop
tax ; check ports
dex
@checkport:
lda udp_cbportlo,x
cmp udp_inp + udp_dest_port + 1
bne :+
lda udp_cbporthi,x
cmp udp_inp + udp_dest_port
beq @handle
: dex
bpl @checkport
@drop:
lda #KPR_ERROR_NO_SUCH_LISTENER
sta ip65_error
sec
rts
@handle:
lda udp_cbveclo,x ; copy vector
sta udp_cbtmp + 1
lda udp_cbvechi,x
sta udp_cbtmp + 2
jsr udp_cbtmp ; call listener
clc
rts
;add a udp listener
;inputs:
; udp_callback: vector to call when udp packet arrives on specified port
; AX: set to udp port to listen on
;outputs:
; carry flag set if too may listeners already installed, clear otherwise
udp_add_listener:
sta port
stx port + 1
ldy udp_cbcount ; any listeners at all?
beq @add
cpy #udp_cbmax ; max?
beq @full
ldy #0
@check:
lda udp_cbportlo,y ; check if port is already handled
cmp port
bne :+
lda udp_cbporthi,y
cmp port + 1
beq @busy
: iny
cpy udp_cbcount
bne @check
@add:
inc udp_cbcount ; increase counter
sta udp_cbportlo,y ; add port
txa
sta udp_cbporthi,y ; add port
lda udp_callback ; and vector
sta udp_cbveclo,y
lda udp_callback + 1
sta udp_cbvechi,y
clc
rts
@full:
@busy:
lda #KPR_ERROR_LISTENER_NOT_AVAILABLE
sta ip65_error
sec
sec
rts
; remove an udp listener
; inputs:
; AX = port to stop listening on
; outputs:
; carry flag clear of handler found and removed
; carry flag set if handler for specified port not found
udp_remove_listener:
sta port
stx port + 1
ldy udp_cbcount ; any listeners installed?
beq @notfound
dey
@check:
lda udp_cbportlo,y ; check if port is handled
cmp port
bne :+
lda udp_cbporthi,y
cmp port + 1
beq @remove
: dey
bpl @check
@notfound:
sec
rts
@remove:
tya ; number of listeners below
eor #$ff
clc
adc udp_cbcount
beq @done
@move:
tax ; number of items to move
: lda udp_cbportlo + 1,y ; move ports
sta udp_cbportlo,y
lda udp_cbporthi + 1,y
sta udp_cbporthi,y
lda udp_cbveclo + 1,y ; move vectors
sta udp_cbveclo,y
lda udp_cbvechi + 1,y
sta udp_cbvechi,y
iny
dex
bne :-
@done:
dec udp_cbcount ; decrement counter
clc
rts
;send udp packet
;inputs:
; udp_send_dest: destination ip address (4 bytes)
; udp_send_dest_port: destination port (2 bytes)
; udp_send_src_port: source port (2 bytes)
; udp_send_len: length of data to send (exclusive of any headers)
; AX: pointer to buffer containing data to be sent
;outputs:
; carry flag is set if an error occured, clear otherwise
udp_send:
stax copy_src ; copy data to output buffer
rts;FIXME
;-- LICENSE FOR w5100_udp.s --
; The contents of this file are subject to the Mozilla Public License
; Version 1.1 (the "License"); you may not use this file except in
; compliance with the License. You may obtain a copy of the License at
; http://www.mozilla.org/MPL/
;
; Software distributed under the License is distributed on an "AS IS"
; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
; License for the specific language governing rights and limitations
; under the License.
;
; The Original Code is ip65.
;
; The Initial Developer of the Original Code is Jonno Downes,
; jonno@jamtronix.com.
; Portions created by the Initial Developer are Copyright (C) 2010
; Jonno Downes. All Rights Reserved.
; -- LICENSE END --