net_device: re-factor code so as to not be specific to lwIP
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@@ -99,7 +99,7 @@ static err_t linkoutput_fn(struct netif *netif, struct pbuf *p)
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/* if the network driver can accept another packet, we make it happen */
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if (tud_network_can_xmit())
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{
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tud_network_xmit(p);
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tud_network_xmit(p, 0 /* unused for this example */);
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return ERR_OK;
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}
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@@ -152,17 +152,49 @@ bool dns_query_proc(const char *name, ip_addr_t *addr)
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return false;
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}
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bool tud_network_recv_cb(struct pbuf *p)
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bool tud_network_recv_cb(const uint8_t *src, uint16_t size)
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{
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/* this shouldn't happen, but if we get another packet before
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parsing the previous, we must signal our inability to accept it */
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if (received_frame) return false;
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/* store away the pointer for service_traffic() to later handle */
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received_frame = p;
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if (size)
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{
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struct pbuf *p = pbuf_alloc(PBUF_RAW, size, PBUF_POOL);
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if (p)
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{
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/* pbuf_alloc() has already initialized struct; all we need to do is copy the data */
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memcpy(p->payload, src, size);
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/* store away the pointer for service_traffic() to later handle */
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received_frame = p;
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}
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}
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return true;
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}
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uint16_t tud_network_xmit_cb(uint8_t *dst, void *ref, uint16_t arg)
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{
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struct pbuf *p = (struct pbuf *)ref;
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struct pbuf *q;
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uint16_t len = 0;
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(void)arg; /* unused for this example */
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/* traverse the "pbuf chain"; see ./lwip/src/core/pbuf.c for more info */
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for(q = p; q != NULL; q = q->next)
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{
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memcpy(dst, (char *)q->payload, q->len);
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dst += q->len;
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len += q->len;
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if (q->len == q->tot_len) break;
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}
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return len;
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}
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static void service_traffic(void)
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{
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/* handle any packet received by tud_network_recv_cb() */
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