/* Upper half does the polling. */
static uint16_t
slip_poll_handler(uint8_t *outbuf, uint16_t blen)
{
/* This is a hack and won't work across buffer edge! */
if(rxbuf[begin] == 'C') {
int i;
if(begin < end && (end - begin) >= 6
&& memcmp(&rxbuf[begin], "CLIENT", 6) == 0) {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
memset(&rxbuf[begin], 0x0, 6);
rxbuf_init();
for(i = 0; i < 13; i++) {
slip_arch_writeb("CLIENTSERVER\300"[i]);
}
return 0;
}
} else if(rxbuf[begin] == '?') {
int i, j;
char* hexchar = "0123456789abcdef";
if(begin < end && (end - begin) >= 2
&& rxbuf[begin + 1] == 'M') {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
rxbuf[begin] = 0;
rxbuf[begin + 1] = 0;
rxbuf_init();
/* this is just a test so far... just to see if it works */
slip_arch_writeb('!');
slip_arch_writeb('M');
//MF
#if 0
for(j = 0; j < 8; j++) {
slip_arch_writeb(hexchar[ds2411_id[j] >> 4]);
slip_arch_writeb(hexchar[ds2411_id[j] & 15]);
}
#else
for(j = 0; j < 8; j++) {
slip_arch_writeb(0);
slip_arch_writeb(0);
}
#endif
slip_arch_writeb(SLIP_END);
return 0;
}
/* Upper half does the polling. */
static uint16_t
slip_poll_handler(uint8_t *outbuf, uint16_t blen)
{
/* This is a hack and won't work across buffer edge! */
if(rxbuf[begin] == 'C') {
int i;
if(begin < end && (end - begin) >= 6
&& memcmp(&rxbuf[begin], "CLIENT", 6) == 0) {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
memset(&rxbuf[begin], 0x0, 6);
rxbuf_init();
for(i = 0; i < 13; i++) {
slip_arch_writeb("CLIENTSERVER\300"[i]);
}
return 0;
}
}
#ifdef SLIP_CONF_ANSWER_MAC_REQUEST
else if(rxbuf[begin] == '?') {
/* Used by tapslip6 to request mac for auto configure */
int i, j;
char* hexchar = "0123456789abcdef";
if(begin < end && (end - begin) >= 2
&& rxbuf[begin + 1] == 'M') {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
rxbuf[begin] = 0;
rxbuf[begin + 1] = 0;
rxbuf_init();
rimeaddr_t addr = get_mac_addr();
/* this is just a test so far... just to see if it works */
slip_arch_writeb('!');
slip_arch_writeb('M');
for(j = 0; j < 8; j++) {
slip_arch_writeb(hexchar[addr.u8[j] >> 4]);
slip_arch_writeb(hexchar[addr.u8[j] & 15]);
}
slip_arch_writeb(SLIP_END);
return 0;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(slip_process, ev, data)
{
PROCESS_BEGIN();
rxbuf_init();
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
slip_active = 1;
/* Move packet from rxbuf to buffer provided by uIP. */
uip_len = slip_poll_handler(&uip_buf[UIP_LLH_LEN],
UIP_BUFSIZE - UIP_LLH_LEN);
#if !UIP_CONF_IPV6
if(uip_len == 4 && strncmp((char*)&uip_buf[UIP_LLH_LEN], "?IPA", 4) == 0) {
char buf[8];
memcpy(&buf[0], "=IPA", 4);
memcpy(&buf[4], &uip_hostaddr, 4);
if(input_callback) {
input_callback();
}
slip_write(buf, 8);
} else if(uip_len > 0
&& uip_len == (((u16_t)(BUF->len[0]) << 8) + BUF->len[1])
&& uip_ipchksum() == 0xffff) {
#define IP_DF 0x40
if(BUF->ipid[0] == 0 && BUF->ipid[1] == 0 && BUF->ipoffset[0] & IP_DF) {
static u16_t ip_id;
u16_t nid = ip_id++;
BUF->ipid[0] = nid >> 8;
BUF->ipid[1] = nid;
nid = uip_htons(nid);
nid = ~nid; /* negate */
BUF->ipchksum += nid; /* add */
if(BUF->ipchksum < nid) { /* 1-complement overflow? */
BUF->ipchksum++;
}
}
tcpip_input();
} else {
uip_len = 0;
SLIP_STATISTICS(slip_ip_drop++);
}
#else /* UIP_CONF_IPV6 */
if(uip_len > 0) {
if(input_callback) {
input_callback();
}
tcpip_input();
}
#endif /* UIP_CONF_IPV6 */
}
/* Upper half does the polling. */
static uint16_t
slip_poll_handler(uint8_t *outbuf, uint16_t blen)
{
/* This is a hack and won't work across buffer edge! */
#if 0
if(rxbuf[begin] == 'C') {
int i;
if(begin < end && (end - begin) >= 6
&& memcmp(&rxbuf[begin], "CLIENT", 6) == 0) {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
memset(&rxbuf[begin], 0x0, 6);
rxbuf_init();
for(i = 0; i < 13; i++) {
slip_arch_writeb("CLIENTSERVER\300"[i]);
}
return 0;
}
}
#endif
if(rxbuf[begin] == '?' || rxbuf[begin] == '!') { // Should this characters be escaped?
uint8_t tmpbuf[14];
from_slipbuffer(tmpbuf, 14);
if(tmpbuf[0] == '?') {
int j;
char* hexchar = "0123456789abcdef";
if(tmpbuf[1] == 'M') {
/* this is just a test so far... just to see if it works */
slip_arch_writeb('!');
slip_arch_writeb('M');
for(j = 0; j < LINKADDR_SIZE; j++) {
slip_arch_writeb(hexchar[linkaddr_node_addr.u8[j] >> 4]);
slip_arch_writeb(hexchar[linkaddr_node_addr.u8[j] & 15]);
}
slip_arch_writeb(SLIP_END);
return 0;
}
/* Upper half does the polling. */
static u16_t
slip_poll_handler(u8_t *outbuf, u16_t blen)
{
/* This is a hack and won't work across buffer edge! */
if(rxbuf[begin] == 'C') {
int i;
if(begin < end && (end - begin) >= 6
&& memcmp(&rxbuf[begin], "CLIENT", 6) == 0) {
state = STATE_TWOPACKETS; /* Interrupts do nothing. */
memset(&rxbuf[begin], 0x0, 6);
rxbuf_init();
for(i = 0; i < 13; i++) {
slip_arch_writeb("CLIENTSERVER\300"[i]);
}
return 0;
}
}
/*
* Interrupt can not change begin but may change pkt_end.
* If pkt_end != begin it will not change again.
*/
if(begin != pkt_end) {
u16_t len;
if(begin < pkt_end) {
len = pkt_end - begin;
if(len > blen) {
len = 0;
} else {
memcpy(outbuf, &rxbuf[begin], len);
}
} else {
len = (RX_BUFSIZE - begin) + (pkt_end - 0);
if(len > blen) {
len = 0;
} else {
unsigned i;
for(i = begin; i < RX_BUFSIZE; i++) {
*outbuf++ = rxbuf[i];
}
for(i = 0; i < pkt_end; i++) {
*outbuf++ = rxbuf[i];
}
}
}
/* Remove data from buffer together with the copied packet. */
begin = pkt_end;
if(state == STATE_TWOPACKETS) {
pkt_end = end;
state = STATE_OK; /* Assume no bytes where lost! */
/* One more packet is buffered, need to be polled again! */
process_poll(&slip_process);
}
return len;
}
return 0;
}
