101 lines
4 KiB
C
101 lines
4 KiB
C
/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#ifndef __LWIP_NETBUF_H__
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#define __LWIP_NETBUF_H__
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#include "lwip/opt.h"
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#include "lwip/pbuf.h"
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#include "lwip/ip_addr.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** This netbuf has dest-addr/port set */
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#define NETBUF_FLAG_DESTADDR 0x01
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/** This netbuf includes a checksum */
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#define NETBUF_FLAG_CHKSUM 0x02
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struct netbuf {
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struct pbuf *p, *ptr;
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ip_addr_t addr;
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u16_t port;
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#if LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY
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#if LWIP_CHECKSUM_ON_COPY
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u8_t flags;
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#endif /* LWIP_CHECKSUM_ON_COPY */
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u16_t toport_chksum;
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#if LWIP_NETBUF_RECVINFO
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ip_addr_t toaddr;
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#endif /* LWIP_NETBUF_RECVINFO */
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#endif /* LWIP_NETBUF_RECVINFO || LWIP_CHECKSUM_ON_COPY */
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};
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/* Network buffer functions: */
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struct netbuf * netbuf_new (void);
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void netbuf_delete (struct netbuf *buf);
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void * netbuf_alloc (struct netbuf *buf, u16_t size);
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void netbuf_free (struct netbuf *buf);
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err_t netbuf_ref (struct netbuf *buf,
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const void *dataptr, u16_t size);
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void netbuf_chain (struct netbuf *head,
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struct netbuf *tail);
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err_t netbuf_data (struct netbuf *buf,
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void **dataptr, u16_t *len);
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s8_t netbuf_next (struct netbuf *buf);
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void netbuf_first (struct netbuf *buf);
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#define netbuf_copy_partial(buf, dataptr, len, offset) \
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pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
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#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
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#define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len)
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#define netbuf_len(buf) ((buf)->p->tot_len)
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#define netbuf_fromaddr(buf) (&((buf)->addr))
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#define netbuf_set_fromaddr(buf, fromaddr) ip_addr_set((&(buf)->addr), fromaddr)
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#define netbuf_fromport(buf) ((buf)->port)
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#if LWIP_NETBUF_RECVINFO
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#define netbuf_destaddr(buf) (&((buf)->toaddr))
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#define netbuf_set_destaddr(buf, destaddr) ip_addr_set((&(buf)->addr), destaddr)
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#define netbuf_destport(buf) (((buf)->flags & NETBUF_FLAG_DESTADDR) ? (buf)->toport_chksum : 0)
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#endif /* LWIP_NETBUF_RECVINFO */
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#if LWIP_CHECKSUM_ON_COPY
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#define netbuf_set_chksum(buf, chksum) do { (buf)->flags = NETBUF_FLAG_CHKSUM; \
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(buf)->toport_chksum = chksum; } while(0)
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#endif /* LWIP_CHECKSUM_ON_COPY */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __LWIP_NETBUF_H__ */
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