*/
/*
- * This is an arch independent SLIP netif. The specific serial hooks must be provided
- * by another file.They are sio_open, sio_recv and sio_send
- */
+ * This is an arch independent SLIP netif. The specific serial hooks must be
+ * provided by another file. They are sio_open, sio_recv and sio_send
+ */
#include "netif/slipif.h"
#include "lwip/opt.h"
* Send a pbuf doing the necessary SLIP encapsulation
*
* Uses the serial layer's sio_send()
- */
+ */
err_t
slipif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
{
struct pbuf *q;
- int i;
+ u16_t i;
u8_t c;
/* Send pbuf out on the serial I/O device. */
sio_send(SLIP_END, netif->state);
- for(q = p; q != NULL; q = q->next) {
- for(i = 0; i < q->len; i++) {
+ for (q = p; q != NULL; q = q->next) {
+ for (i = 0; i < q->len; i++) {
c = ((u8_t *)q->payload)[i];
switch (c) {
case SLIP_END:
- sio_send(SLIP_ESC, netif->state);
- sio_send(SLIP_ESC_END, netif->state);
- break;
+ sio_send(SLIP_ESC, netif->state);
+ sio_send(SLIP_ESC_END, netif->state);
+ break;
case SLIP_ESC:
- sio_send(SLIP_ESC, netif->state);
- sio_send(SLIP_ESC_ESC, netif->state);
- break;
+ sio_send(SLIP_ESC, netif->state);
+ sio_send(SLIP_ESC_ESC, netif->state);
+ break;
default:
- sio_send(c, netif->state);
- break;
+ sio_send(c, netif->state);
+ break;
}
}
}
* Poll the serial layer by calling sio_recv()
*
* @return The IP packet when SLIP_END is received
- */
+ */
static struct pbuf *
-slipif_input( struct netif * netif )
+slipif_input(struct netif *netif)
{
u8_t c;
struct pbuf *p, *q;
- int recved;
- int i;
+ u16_t recved;
+ u16_t i;
q = p = NULL;
recved = i = 0;
switch (c) {
case SLIP_END:
if (recved > 0) {
- /* Received whole packet. */
- pbuf_realloc(q, recved);
-
- LINK_STATS_INC(link.recv);
-
- LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
- return q;
+ /* Received whole packet. */
+ pbuf_realloc(q, recved);
+
+ LINK_STATS_INC(link.recv);
+
+ LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
+ return q;
}
break;
c = sio_recv(netif->state);
switch (c) {
case SLIP_ESC_END:
- c = SLIP_END;
- break;
+ c = SLIP_END;
+ break;
case SLIP_ESC_ESC:
- c = SLIP_ESC;
- break;
+ c = SLIP_ESC;
+ break;
}
/* FALLTHROUGH */
-
+
default:
if (p == NULL) {
- LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
- p = pbuf_alloc(PBUF_LINK, PBUF_POOL_BUFSIZE, PBUF_POOL);
-
- if (p == NULL) {
- LINK_STATS_INC(link.drop);
- LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
- }
-
- if (q != NULL) {
- pbuf_cat(q, p);
- } else {
- q = p;
- }
+ LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
+ p = pbuf_alloc(PBUF_LINK, PBUF_POOL_BUFSIZE, PBUF_POOL);
+
+ if (p == NULL) {
+ LINK_STATS_INC(link.drop);
+ LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
+ }
+
+ if (q != NULL) {
+ pbuf_cat(q, p);
+ } else {
+ q = p;
+ }
}
if (p != NULL && recved < MAX_SIZE) {
- ((u8_t *)p->payload)[i] = c;
- recved++;
- i++;
- if (i >= p->len) {
- i = 0;
- p = NULL;
- }
+ ((u8_t *)p->payload)[i] = c;
+ recved++;
+ i++;
+ if (i >= p->len) {
+ i = 0;
+ if (p->next != NULL && p->next->len > 0)
+ p = p->next;
+ else
+ p = NULL;
+ }
}
break;
}
-
+
}
return NULL;
}
/**
- * The SLIP input thread
+ * The SLIP input thread.
*
* Feed the IP layer with incoming packets
- */
+ */
static void
slipif_loop(void *nf)
{
*
* Call the arch specific sio_open and remember
* the opened device in the state field of the netif.
- */
+ */
err_t
slipif_init(struct netif *netif)
{
-
- LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%x\n", (int)netif->num));
+
+ LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
netif->name[0] = 's';
netif->name[1] = 'l';
netif->output = slipif_output;
- netif->mtu = 1500;
+ netif->mtu = 1500;
netif->flags = NETIF_FLAG_POINTTOPOINT;
netif->state = sio_open(netif->num);
if (!netif->state)
- return ERR_IF;
+ return ERR_IF;
sys_thread_new(slipif_loop, netif, SLIPIF_THREAD_PRIO);
return ERR_OK;