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Added a function that gets called when we see SLIP input. This function can be used to determine if a node is a SLIP gateway or not.

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This commit is contained in:
adamdunkels 2008-02-24 21:00:53 +00:00
parent 8906441004
commit af48b648ee
2 changed files with 48 additions and 32 deletions
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22
core/dev/slip.c
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@ -29,7 +29,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* @(#)$Id: slip.c,v 1.6 2008/02/03 20:43:35 adamdunkels Exp $ * @(#)$Id: slip.c,v 1.7 2008/02/24 21:00:53 adamdunkels Exp $
*/ */
@ -86,7 +86,13 @@ static u16_t begin, end;
static u8_t rxbuf[RX_BUFSIZE]; static u8_t rxbuf[RX_BUFSIZE];
static u16_t pkt_end; /* SLIP_END tracker. */ static u16_t pkt_end; /* SLIP_END tracker. */
static void (* input_callback)(void) = NULL;
/*---------------------------------------------------------------------------*/
void
slip_set_input_callback(void (*c)(void))
{
input_callback = c;
}
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
u8_t u8_t
slip_send(void) slip_send(void)
@ -116,7 +122,7 @@ slip_send(void)
return UIP_FW_OK; return UIP_FW_OK;
} }
/*---------------------------------------------------------------------------*/
u8_t u8_t
slip_write(const void *_ptr, int len) slip_write(const void *_ptr, int len)
{ {
@ -141,7 +147,6 @@ slip_write(const void *_ptr, int len)
return len; return len;
} }
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
static void static void
rxbuf_init(void) rxbuf_init(void)
@ -191,12 +196,14 @@ slip_poll_handler(u8_t *outbuf, u16_t blen)
len = 0; len = 0;
} else { } else {
unsigned i; unsigned i;
for(i = begin; i < RX_BUFSIZE; i++) for(i = begin; i < RX_BUFSIZE; i++) {
*outbuf++ = rxbuf[i]; *outbuf++ = rxbuf[i];
for(i = 0; i < pkt_end; i++) }
for(i = 0; i < pkt_end; i++) {
*outbuf++ = rxbuf[i]; *outbuf++ = rxbuf[i];
} }
} }
}
/* Remove data from buffer together with the copied packet. */ /* Remove data from buffer together with the copied packet. */
begin = pkt_end; begin = pkt_end;
@ -232,6 +239,9 @@ PROCESS_THREAD(slip_process, ev, data)
char buf[8]; char buf[8];
memcpy(&buf[0], "=IPA", 4); memcpy(&buf[0], "=IPA", 4);
memcpy(&buf[4], &uip_hostaddr, 4); memcpy(&buf[4], &uip_hostaddr, 4);
if(input_callback) {
input_callback();
}
slip_write(buf, 8); slip_write(buf, 8);
} else if(uip_len > 0 } else if(uip_len > 0
&& uip_len == (((u16_t)(BUF->len[0]) << 8) + BUF->len[1]) && uip_len == (((u16_t)(BUF->len[0]) << 8) + BUF->len[1])

8
core/dev/slip.h
View file

@ -29,7 +29,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* @(#)$Id: slip.h,v 1.4 2007/02/02 13:26:48 bg- Exp $ * @(#)$Id: slip.h,v 1.5 2008/02/24 21:00:53 adamdunkels Exp $
*/ */
#ifndef __SLIP_H__ #ifndef __SLIP_H__
@ -71,6 +71,12 @@ extern u8_t slip_active;
/* Statistics. */ /* Statistics. */
extern u16_t slip_rubbish, slip_twopackets, slip_overflow, slip_ip_drop; extern u16_t slip_rubbish, slip_twopackets, slip_overflow, slip_ip_drop;
/**
* Set a function to be called when there is activity on the SLIP
* interface; used for detecting if a node is a gateway node.
*/
void slip_set_input_callback(void (*callback)(void));
/* /*
* These machine dependent functions and an interrupt service routine * These machine dependent functions and an interrupt service routine
* must be provided externally (slip_arch.c). * must be provided externally (slip_arch.c).