contiki/core/net/ppp/ppp_process.c

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/*
* $Id: ppp_process.c,v 1.1 2006/06/17 22:48:09 adamdunkels Exp $
*/
#include "contiki.h"
#include "contiki-net.h"
#include "net/ppp/ppp.h"
PROCESS(ppp_process, "PPP");
//-----------------------------------------------------------------------------
// Note, that the UART RX-FIFO must be polled often enough so we don't get an
// overrun at the used baudrate.
//-----------------------------------------------------------------------------
#define PPP_POLL_INTERVAL (CLOCK_SECOND / 256)
#define AT_TIMEOUT (2 * CLOCK_SECOND / PPP_POLL_INTERVAL)
#define AT_RX_BUF 64
enum {
AT_CONNECT_DIRECT,
AT_CONNECT_AUTO,
AT_CONNECT_MANUAL
} At_connect;
enum {
AT_IDLE,
AT_CONNECT,
AT_CONNECT1,
AT_CONNECT2,
AT_CONNECTED,
AT_RESET,
AT_RESET1,
AT_RESET2,
AT_RESET3,
AT_RESET4,
AT_RESET5
};
static struct etimer pppTimer;
static u8_t at_state;
static u8_t at_connect_mode = AT_CONNECT_MODE;
static int at_timeout = -1;
static u8_t at_rxBuf[ AT_RX_BUF ];
static void
at_puts(char *s) {
while(*s) {
ppp_arch_putchar(*s);
s++;
}
}
static u8_t
*at_gets() {
static u8_t consumed;
int len;
int i;
if (consumed) {
consumed = 0;
at_rxBuf[0] = 0;
}
len = strlen(at_rxBuf);
for (i=len; i<AT_RX_BUF-1; i++) {
if ( ppp_arch_getchar(&at_rxBuf[i])) {
at_rxBuf[i+1] = 0;
if (at_rxBuf[i] == '\n') {
//printf("at_gets=(%s)\n", at_rxBuf);
consumed = 1;
return at_rxBuf;
}
} else {
return NULL;
}
}
// overflow -> reset the buf
at_rxBuf[0] = 0;
return NULL;
}
static void
at_poll() {
static u8_t loopCnt = 0;
u8_t *s;
if (at_timeout > 0) {
at_timeout--;
}
if (at_state == AT_CONNECTED) {
ppp_poll();
if(uip_len > 0) {
tcpip_input();
}
if (loopCnt++ > 16) {
int i;
loopCnt = 0;
for (i=0; i<UIP_CONNS; i++) {
uip_periodic(i);
if(uip_len > 0) {
tcpip_output();
}
}
}
} else {
switch (at_state) {
case AT_IDLE:
switch (at_connect_mode) {
case AT_CONNECT_DIRECT:
at_state = AT_CONNECTED;
ppp_connect();
break;
case AT_CONNECT_AUTO:
at_state = AT_CONNECT;
break;
}
break;
case AT_CONNECT:
at_gets(); // make the input buffer empty
at_puts("ATE1\r\n");
at_state = AT_CONNECT1;
at_timeout = AT_TIMEOUT;
break;
case AT_CONNECT1:
if (at_timeout == 0) {
at_state = AT_RESET;
} else if ((s=at_gets())) {
if (strcmp(s,"OK\r\n") == 0) {
at_puts("AT+CGDCONT=1,\"IP\",\"online.telia.se\",\"\",0,0\r\n");
at_timeout = AT_TIMEOUT;
at_state = AT_CONNECT2;
}
}
break;
case AT_CONNECT2:
if (at_timeout == 0) {
at_state = AT_RESET;
} else if ((s=at_gets())) {
if (strcmp(s,"OK\r\n") == 0) {
at_puts("ATD*99***1#\r\n");
at_state = AT_CONNECTED;
ppp_connect();
}
}
break;
case AT_RESET:
//printf("AT_RESET\n");
at_timeout = AT_TIMEOUT;
at_state = AT_RESET1;
break;
case AT_RESET1:
if (at_timeout == 0) {
lcp_disconnect(random_rand() & 0xff);
at_timeout = AT_TIMEOUT;
at_state = AT_RESET2;
}
break;
case AT_RESET2:
if (at_timeout == 0) {
lcp_disconnect(random_rand() & 0xff);
at_timeout = AT_TIMEOUT;
at_state = AT_RESET3;
}
break;
case AT_RESET3:
if (at_timeout == 0) {
at_puts("+++");
at_timeout = AT_TIMEOUT;
at_state = AT_RESET4;
}
break;
case AT_RESET4:
if (at_timeout == 0) {
at_puts("ATZ\r\n");
at_timeout = AT_TIMEOUT;
at_state = AT_RESET5;
}
break;
case AT_RESET5:
at_gets(); // make the input buffer empty
if (at_timeout == 0) {
at_state = AT_IDLE;
}
break;
}
}
}
void ppp_reconnect() {
at_state = AT_RESET;
uip_fw_unregister(&pppif);
}
PROCESS_THREAD(ppp_process, ev, data)
{
PROCESS_BEGIN();
at_state = AT_IDLE;
at_rxBuf[0] = 0;
ppp_init();
etimer_set(&pppTimer, PPP_POLL_INTERVAL);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == PROCESS_EVENT_TIMER);
if(etimer_expired(&pppTimer)) {
etimer_set(&pppTimer, PPP_POLL_INTERVAL);
at_poll();
}
}
PROCESS_END();
}