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Ethduino
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MODIF - Now using checksum code from uIP (issue remains!)

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git-svn-id: svn+ssh://oldsvn/home/mlalondesvn/svn/Ethduino@2 b05466c9-153a-0410-ad00-ea1d4d8a27b5
master
mlalondesvn 17 years ago
parent cff122808a
commit 3f7c54bc34
8 changed files with 94 additions and 28 deletions
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4
Makefile
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@ -56,7 +56,7 @@
#
TARGET = main
ARDUINO_VERSION = 0009
INSTALL_DIR = /Applications/arduino-$(ARDUINO_VERSION)
INSTALL_DIR = /Users/mlalonde/Applications/Development/Arduino/arduino-$(ARDUINO_VERSION)
###############################################################################
@ -66,7 +66,7 @@ INSTALL_DIR = /Applications/arduino-$(ARDUINO_VERSION)
#
PORT = /dev/tty.usbserial-A*
UPLOAD_RATE = 19200
AVRDUDE_PROGRAMMER = stk500
AVRDUDE_PROGRAMMER = arduino
# HINT: If you want to use the automatic reset feature which comes with Arduino
# Diecimila, put the follwoing in your avrdude.conf:

2
arp.cpp
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@ -73,9 +73,11 @@ void arpArpIn(unsigned int len, struct netEthArpHeader* packet)
// copy sender's address info to dest. fields
packet->arp.dhwaddr = packet->arp.shwaddr;
packet->arp.dipaddr = packet->arp.sipaddr;
// fill in our information
packet->arp.shwaddr = ArpMyAddr.ethaddr;
packet->arp.sipaddr = HTONL(ArpMyAddr.ipaddr);
// change op to reply
packet->arp.opcode = htons(ARP_OPCODE_REPLY);

4
enc28j60.cpp
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@ -383,7 +383,7 @@ void enc28j60Init(void)
// ETXST defaults to 0x0000 (beginnging of ram)
enc28j60Write(ETXSTL, TXSTART_INIT&0xFF);
enc28j60Write(ETXSTH, TXSTART_INIT>>8);
/*
// Needs register implementation
#ifdef ENC28J60_PACKET_FILTER_ENABLED
// do bank 1 stuff, packet filter:
@ -403,7 +403,7 @@ void enc28j60Init(void)
enc28j60Write(EPMCSL, 0xf9);
enc28j60Write(EPMCSH, 0xf7);
#endif
*/
// do bank 2 stuff
// enable MAC receive
enc28j60Write(MACON1, MACON1_MARXEN|MACON1_TXPAUS|MACON1_RXPAUS);

20
icmp.cpp
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@ -51,17 +51,33 @@ void icmpIpIn(icmpip_hdr* packet)
void icmpEchoRequest(icmpip_hdr* packet)
{
uint32_t tempIp;
uint32_t tempIp, tempId;
// change type to reply
packet->icmp.type = ICMP_TYPE_ECHOREPLY;
// recalculate checksum
packet->icmp.icmpchksum = 0;
packet->icmp.icmpchksum = netChecksum((netIpHeader*)&packet->icmp, htons(packet->ip.len)-IP_HEADER_LEN);
packet->icmp.icmpchksum = ipChecksum((netIpHeader*)&packet->icmp, htons(packet->ip.len)-IP_HEADER_LEN);
SPrint_P(PSTR("ICMP Checksum: "));
Serial.println((long int)packet->icmp.icmpchksum, HEX);
// return to sender
tempIp = packet->ip.destipaddr;
packet->ip.destipaddr = packet->ip.srcipaddr;
packet->ip.srcipaddr = tempIp;
// Set the proper transaction id
tempId = packet->ip.ipid;
packet->ip.ipid = tempId;
SPrint_P(PSTR("ipID: "));
Serial.println((long int)tempId, HEX);
tempId = packet->icmp.id;
packet->icmp.id = tempId;
SPrint_P(PSTR("icmp.id: "));
Serial.println((long int)tempId, HEX);
// add ethernet routing
arpIpOut((struct netEthIpHeader*)(((u08*)packet)-ETH_HEADER_LEN), 0);

2
main.h
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@ -41,7 +41,7 @@
// Network options
#define IPADDRESS IPDOT(192l,168l,0l,126l)
#define NETMASK IPDOT(255l,255l,0l,0l)
#define GATEWAY IPDOT(192l,168l,0l,1l)
#define GATEWAY IPDOT(192l,168l,255l,255l)
#define ETHADDR0 0xCC /*'78'*/
#define ETHADDR1 0x00 /*'53'*/

73
net.cpp
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@ -30,29 +30,72 @@ uint32_t htonl(uint32_t val)
return (htons(val>>16) | (uint32_t)htons(val&0x0000FFFF)<<16);
}
static uint16_t generateChecksum(uint16_t sum, netIpHeader *data, uint16_t len)
{
uint16_t t;
uint32_t *dataptr;
uint32_t *last_byte;
dataptr = (uint32_t *) data;
last_byte = (uint32_t *) data + len - 1;
while(dataptr < last_byte) { // At least two more bytes
t = (dataptr[0] << 8) + dataptr[1];
sum += t;
if(sum < t) {
sum++; // carry
}
dataptr += 2;
}
if(dataptr == last_byte) {
t = (dataptr[0] << 8) + 0;
sum += t;
if(sum < t) {
sum++; // carry
}
}
// Return sum in host byte order.
return sum;
}
uint16_t ipChecksum(netIpHeader *data, uint16_t len)
{
return htons(generateChecksum(0, (netIpHeader *)data, len));
}
uint16_t netChecksum(netIpHeader *data, uint16_t len)
{
register uint32_t sum = 0;
uint16_t sum;
sum = generateChecksum(0, &data[len], len);
SPrintln_P(PSTR("uip_ipchksum: sum 0x"));
Serial.println((long int)sum, HEX);
return (sum == 0) ? 0xffff : htons(sum);
/* register uint32_t sum = 0;
for (;;) {
if (len < 2)
break;
for (;;) {
if (len < 2)
break;
//sum += *((uint16_t *)data)++;
sum += *((uint16_t *)data);
data+=2;
len -= 2;
}
if (len)
sum += *(uint8_t *) data;
len -= 2;
}
while ((len = (uint16_t) (sum >> 16)) != 0)
sum = (uint16_t) sum + len;
if (len)
sum += *(uint8_t *) data;
while ((len = (uint16_t) (sum >> 16)) != 0)
sum = (uint16_t) sum + len;
#if NET_DEBUG > 6
Serial.print("Checksum: ");
Serial.println((uint16_t) sum ^ 0xFFFF, HEX);
return (uint16_t) sum ^ 0xFFFF;
Serial.println((uint16_t) ~sum, HEX);
#endif
return (uint16_t) ~sum;
*/
}
void netPrintEthAddr(struct netEthAddr* ethaddr)
@ -97,7 +140,7 @@ void netPrintEthHeader(struct netEthHeader* eth_hdr)
void netPrintIpHeader(struct netIpHeader* ipheader)
{
SPrint_P(PSTR("IP Header\r\n"));
SPrint_P(PSTR("Ver : %d\r\n", (ipheader->vhl)>>4);
SPrint_P(PSTR("Ver : %d\r\n", (ipheader->vhl)>>4);
SPrint_P(PSTR("Length : %d\r\n", htons(ipheader->len));
if(ipheader->proto == IP_PROTO_ICMP)
SPrint_P(PSTR("Protocol: ICMP\r\n"));
@ -109,7 +152,7 @@ void netPrintIpHeader(struct netIpHeader* ipheader)
SPrint_P(PSTR("Protocol: %d\r\n", ipheader->proto);
SPrint_P(PSTR("SourceIP: ")); netPrintIPAddr(htonl(ipheader->srcipaddr)); Serial.println();
SPrint_P(PSTR("Dest IP: ")); netPrintIPAddr(htonl(ipheader->destipaddr)); Serial.println();
SPrint_P(PSTR("Dest IP: ")); netPrintIPAddr(htonl(ipheader->destipaddr)); Serial.println();
}
void netPrintTcpHeader(struct netTcpHeader* tcpheader)

7
net.h
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@ -189,9 +189,14 @@ uint16_t htons(uint16_t val);
//! Host-to-Network LONG (32-bit) byte-order swap (function).
uint32_t htonl(uint32_t val);
//! Calculate IP-style checksum from data.
//! Calculate IP checksum from data.
uint16_t ipChecksum(netIpHeader *data, uint16_t len);
//! Calculate IP Header checksum from data.
uint16_t netChecksum(netIpHeader *data, uint16_t len);
static uint16_t generateChecksum(uint16_t sum, netIpHeader *data, uint16_t len);
//! Print Ethernet address in XX:XX:XX:XX:XX:XX format.
void netPrintEthAddr(struct netEthAddr* ethaddr);
//! Print IP address in dot notation.

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