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00032 #ifndef __LWIP_NETBUF_H__
00033 #define __LWIP_NETBUF_H__
00034
00035 #include "lwip/opt.h"
00036 #include "lwip/pbuf.h"
00037 #include "lwip/ip_addr.h"
00038
00039 #ifdef __cplusplus
00040 extern "C" {
00041 #endif
00042
00043
00044 #define NETBUF_FLAG_DESTADDR 0x01
00045
00046 #define NETBUF_FLAG_CHKSUM 0x02
00047
00048 struct netbuf {
00049 struct pbuf *p, *ptr;
00050 ip_addr_t addr;
00051 u16_t port;
00052 #if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY
00053 #if LWIP_CHECKSUM_ON_COPY
00054 u8_t flags;
00055 #endif
00056 u16_t toport_chksum;
00057 #if LWIP_NETBUF_RECVINFO
00058 ip_addr_t toaddr;
00059 #endif
00060 #endif
00061 };
00062
00063
00064 struct netbuf * netbuf_new (void);
00065 void netbuf_delete (struct netbuf *buf);
00066 void * netbuf_alloc (struct netbuf *buf, u16_t size);
00067 void netbuf_free (struct netbuf *buf);
00068 err_t netbuf_ref (struct netbuf *buf,
00069 const void *dataptr, u16_t size);
00070 void netbuf_chain (struct netbuf *head,
00071 struct netbuf *tail);
00072
00073 err_t netbuf_data (struct netbuf *buf,
00074 void **dataptr, u16_t *len);
00075 s8_t netbuf_next (struct netbuf *buf);
00076 void netbuf_first (struct netbuf *buf);
00077
00078
00079 #define netbuf_copy_partial(buf, dataptr, len, offset) \
00080 pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
00081 #define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
00082 #define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len)
00083 #define netbuf_len(buf) ((buf)->p->tot_len)
00084 #define netbuf_fromaddr(buf) (&((buf)->addr))
00085 #define netbuf_set_fromaddr(buf, fromaddr) ip_addr_set((&(buf)->addr), fromaddr)
00086 #define netbuf_fromport(buf) ((buf)->port)
00087 #if LWIP_NETBUF_RECVINFO
00088 #define netbuf_destaddr(buf) (&((buf)->toaddr))
00089 #define netbuf_set_destaddr(buf, destaddr) ip_addr_set((&(buf)->addr), destaddr)
00090 #define netbuf_destport(buf) (((buf)->flags & NETBUF_FLAG_DESTADDR) ? (buf)->toport_chksum : 0)
00091 #endif
00092 #if LWIP_CHECKSUM_ON_COPY
00093 #define netbuf_set_chksum(buf, chksum) do { (buf)->flags = NETBUF_FLAG_CHKSUM; \
00094 (buf)->toport_chksum = chksum; } while(0)
00095 #endif
00096
00097 #ifdef __cplusplus
00098 }
00099 #endif
00100
00101 #endif