Diff: LPC2368/lwip/include/lwip/pbuf.h

Revision:

5:bc7df6da7589

Parent:

0:422060928e37

--- a/LPC2368/lwip/include/lwip/pbuf.h	Fri Jul 09 14:34:26 2010 +0000
+++ b/LPC2368/lwip/include/lwip/pbuf.h	Thu Aug 05 15:09:22 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
 
@@ -58,16 +62,21 @@
 } pbuf_type;
 
 
-/** indicates this packet's data should be immediately passed to the application */
-#define PBUF_FLAG_PUSH 0x01U
+/* indicates this packet's data should be immediately passed to the application */
+#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 */
+  /* next pbuf in singly linked pbuf chain */
   struct pbuf *next;
 
-  /** pointer to the actual data in the buffer */
+  /* 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.
@@ -76,14 +85,14 @@
    * p->tot_len == p->len + (p->next? p->next->tot_len: 0)
    */
   u16_t tot_len;
-  
-  /** length of this buffer */
-  u16_t len;  
 
-  /** pbuf_type as u8_t instead of enum to save space */
+  /* length of this buffer */
+  u16_t len;
+
+  /* pbuf_type as u8_t instead of enum to save space */
   u8_t /*pbuf_type*/ type;
 
-  /** misc flags */
+  /* misc flags */
   u8_t flags;
 
   /**
@@ -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
 }