mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-30 19:29:45 +00:00
217 lines
5.0 KiB
C
217 lines
5.0 KiB
C
/*
|
|
* Copyright (c) 2007, Takahide Matsutsuka.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $Id: uip_arch.c,v 1.2 2007/09/29 03:57:39 matsutsuka Exp $
|
|
*
|
|
*/
|
|
/*
|
|
* \file
|
|
* Z80 architecture-depend uip module
|
|
* for calculating checksums
|
|
* \author
|
|
* Takahide Matsutsuka <markn@markn.org>
|
|
*/
|
|
|
|
#include <stddef.h>
|
|
#include "uip_arch.h"
|
|
|
|
static const u16_t sizeof_uip_ipaddr_t = sizeof(uip_ipaddr_t);
|
|
static const u16_t offset_tcpip_hdr_len = offsetof(struct uip_tcpip_hdr, len);
|
|
static const u16_t offset_tcpip_hdr_srcipaddr = offsetof(struct uip_tcpip_hdr, srcipaddr);
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
static void upper_layer_chksum() {
|
|
__asm
|
|
;; ---------------------------------
|
|
;; static u16_t upper_layer_chksum(u8_t proto);
|
|
;; Stack; retl reth
|
|
;; @param C proto
|
|
;; ABCDEHL____
|
|
;; ---------------------------------
|
|
;; HL = BUF = &uip_buf[UIP_LLH_LEN]
|
|
ld hl, #_uip_buf
|
|
ld de, #UIP_LLH_LEN
|
|
add hl, de
|
|
push hl
|
|
|
|
;; HL = BUF->len[0]
|
|
push ix
|
|
ld ix, #_offset_tcpip_hdr_len
|
|
ld e, 0(ix)
|
|
ld d, 1(ix)
|
|
add hl, de
|
|
pop ix
|
|
|
|
;; DE = upper layer length
|
|
ld d, (hl)
|
|
inc hl
|
|
ld e, (hl)
|
|
#if UIP_CONF_IPV6
|
|
#else
|
|
ld a, e
|
|
sub a, #UIP_IPH_LEN
|
|
ld e, a
|
|
jr nc, _upper_layer_chksum_setlen2
|
|
dec d
|
|
_upper_layer_chksum_setlen2:
|
|
#endif
|
|
;; bc = upper_leyer_len + proto
|
|
ld b, d
|
|
ld a, e
|
|
add a, c
|
|
ld c, a
|
|
jr nc, _upper_layer_chksum_setlen3
|
|
inc b
|
|
_upper_layer_chksum_setlen3:
|
|
pop hl ; BUF
|
|
push de
|
|
push ix
|
|
ld ix, #_offset_tcpip_hdr_srcipaddr
|
|
ld e, 0(ix)
|
|
ld d, 1(ix)
|
|
add hl, de
|
|
ld e, l
|
|
ld d, h
|
|
ld ix, #_sizeof_uip_ipaddr_t
|
|
ld l, 0(ix)
|
|
ld h, 1(ix)
|
|
pop ix
|
|
sla l
|
|
rl h
|
|
push hl
|
|
push de
|
|
push bc
|
|
call _uip_arch_chksum ; hl = sum
|
|
pop af
|
|
pop af
|
|
pop af
|
|
;; de is still stacked
|
|
|
|
ld b, h
|
|
ld c, l
|
|
ld hl, #_uip_buf
|
|
ld de, #UIP_IPH_LEN
|
|
add hl, de
|
|
_upper_layer_chksum_call:
|
|
ld de, #UIP_LLH_LEN
|
|
add hl, de
|
|
push hl
|
|
push bc
|
|
call _uip_arch_chksum
|
|
pop af
|
|
pop af
|
|
pop af
|
|
|
|
ld a, h
|
|
or a, l
|
|
jr nz, _upper_layer_htons
|
|
ld hl, #0xffff
|
|
jr _upper_layer_ret
|
|
_upper_layer_htons:
|
|
ld a, l
|
|
ld l, h
|
|
ld h, a
|
|
_upper_layer_ret:
|
|
__endasm;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
u16_t
|
|
uip_ipchksum(void)
|
|
{
|
|
__asm
|
|
;; ---------------------------------
|
|
;; u16_t uip_ipchksum(void);
|
|
;; Stack; retl reth
|
|
;; ABCDEHL____
|
|
;; return HL
|
|
;; ---------------------------------
|
|
ld hl, #UIP_IPH_LEN
|
|
push hl
|
|
;; HL = BUF = &uip_buf[UIP_LLH_LEN]
|
|
ld hl, #_uip_buf
|
|
;; BC = sum = 0
|
|
ld bc, #0
|
|
jp _upper_layer_chksum_call
|
|
__endasm;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
#if UIP_CONF_IPV6
|
|
u16_t
|
|
uip_icmp6chksum(void)
|
|
{
|
|
__asm
|
|
;; ---------------------------------
|
|
;; u16_t uip_icmp6chksum(void);
|
|
;; Stack; retl reth
|
|
;; ABCDEHL____
|
|
;; return HL
|
|
;; ---------------------------------
|
|
ld c, #UIP_PROTO_ICMP6
|
|
jp _upper_layer_chksum
|
|
__endasm;
|
|
}
|
|
#endif /* UIP_CONF_IPV6 */
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
u16_t
|
|
uip_tcpchksum(void)
|
|
{
|
|
__asm
|
|
;; ---------------------------------
|
|
;; u16_t uip_tcpchksum(void);
|
|
;; Stack; retl reth
|
|
;; ABCDEHL____
|
|
;; return HL
|
|
;; ---------------------------------
|
|
ld c, #UIP_PROTO_TCP
|
|
jp _upper_layer_chksum
|
|
__endasm;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
#if UIP_UDP_CHKSUMS
|
|
u16_t
|
|
uip_udpchksum(void)
|
|
{
|
|
__asm
|
|
;; ---------------------------------
|
|
;; u16_t uip_udpchksum(void);
|
|
;; Stack; retl reth
|
|
;; ABCDEHL____
|
|
;; return HL
|
|
;; ---------------------------------
|
|
ld c, #UIP_PROTO_UDP
|
|
jp _upper_layer_chksum
|
|
__endasm;
|
|
}
|
|
#endif /* UIP_UDP_CHKSUMS */
|
|
/*--------------------------------------------------------------------------*/
|