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