Diff: LPC1768/lwip/include/lwip/pbuf.h
- Revision:
- 2:1f10f8ab527b
- Parent:
- 0:0f5a52711275
- Child:
- 3:e02ec42cf9c8
--- a/LPC1768/lwip/include/lwip/pbuf.h Mon Jul 19 16:27:52 2010 +0000
+++ b/LPC1768/lwip/include/lwip/pbuf.h Thu Jul 22 11:31:59 2010 +0000
@@ -40,6 +40,10 @@
extern "C" {
#endif
+/** Currently, the pbuf_custom code is only needed for one specific configuration
+ * of IP_FRAG */
+#define LWIP_SUPPORT_CUSTOM_PBUF (IP_FRAG && !IP_FRAG_USES_STATIC_BUF && !LWIP_NETIF_TX_SINGLE_PBUF)
+
#define PBUF_TRANSPORT_HLEN 20
#define PBUF_IP_HLEN 20
@@ -59,7 +63,12 @@
/** indicates this packet's data should be immediately passed to the application */
-#define PBUF_FLAG_PUSH 0x01U
+#define PBUF_FLAG_PUSH 0x01U
+/** indicates this is a custom pbuf: pbuf_free and pbuf_header handle such a
+ a pbuf differently */
+#define PBUF_FLAG_IS_CUSTOM 0x02U
+/** indicates this pbuf is UDP multicast to be looped back */
+#define PBUF_FLAG_MCASTLOOP 0x04U
struct pbuf {
/** next pbuf in singly linked pbuf chain */
@@ -67,7 +76,7 @@
/** pointer to the actual data in the buffer */
void *payload;
-
+
/**
* total length of this buffer and all next buffers in chain
* belonging to the same packet.
@@ -76,9 +85,9 @@
* p->tot_len == p->len + (p->next? p->next->tot_len: 0)
*/
u16_t tot_len;
-
+
/** length of this buffer */
- u16_t len;
+ u16_t len;
/** pbuf_type as u8_t instead of enum to save space */
u8_t /*pbuf_type*/ type;
@@ -92,17 +101,33 @@
* the stack itself, or pbuf->next pointers from a chain.
*/
u16_t ref;
-
};
+#if LWIP_SUPPORT_CUSTOM_PBUF
+/** Prototype for a function to free a custom pbuf */
+typedef void (*pbuf_free_custom_fn)(struct pbuf *p);
+
+/** A custom pbuf: like a pbuf, but following a function pointer to free it. */
+struct pbuf_custom {
+ /** The actual pbuf */
+ struct pbuf pbuf;
+ /** This function is called when pbuf_free deallocates this pbuf(_custom) */
+ pbuf_free_custom_fn custom_free_function;
+};
+#endif /* LWIP_SUPPORT_CUSTOM_PBUF */
+
/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
#define pbuf_init()
-struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
+struct pbuf *pbuf_alloc(pbuf_layer l, u16_t length, pbuf_type type);
+#if LWIP_SUPPORT_CUSTOM_PBUF
+struct pbuf *pbuf_alloced_custom(pbuf_layer l, u16_t length, pbuf_type type,
+ struct pbuf_custom *p, void *payload_mem,
+ u16_t payload_mem_len);
+#endif /* LWIP_SUPPORT_CUSTOM_PBUF */
void pbuf_realloc(struct pbuf *p, u16_t size);
u8_t pbuf_header(struct pbuf *p, s16_t header_size);
void pbuf_ref(struct pbuf *p);
-void pbuf_ref_chain(struct pbuf *p);
u8_t pbuf_free(struct pbuf *p);
u8_t pbuf_clen(struct pbuf *p);
void pbuf_cat(struct pbuf *head, struct pbuf *tail);
@@ -112,6 +137,15 @@
u16_t pbuf_copy_partial(struct pbuf *p, void *dataptr, u16_t len, u16_t offset);
err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len);
struct pbuf *pbuf_coalesce(struct pbuf *p, pbuf_layer layer);
+#if LWIP_CHECKSUM_ON_COPY
+err_t pbuf_fill_chksum(struct pbuf *p, u16_t start_offset, const void *dataptr,
+ u16_t len, u16_t *chksum);
+#endif /* LWIP_CHECKSUM_ON_COPY */
+
+u8_t pbuf_get_at(struct pbuf* p, u16_t offset);
+u16_t pbuf_memcmp(struct pbuf* p, u16_t offset, const void* s2, u16_t n);
+u16_t pbuf_memfind(struct pbuf* p, const void* mem, u16_t mem_len, u16_t start_offset);
+u16_t pbuf_strstr(struct pbuf* p, const char* substr);
#ifdef __cplusplus
}