BadVPN – Blame information for rev 1

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1 office 1 /**
2 * @file
3 * Ethernet output function - handles OUTGOING ethernet level traffic, implements
4 * ARP resolving.
5 * To be used in most low-level netif implementations
6 */
7  
8 /*
9 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
10 * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
11 * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
12 * All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without modification,
15 * are permitted provided that the following conditions are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright notice,
18 * this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright notice,
20 * this list of conditions and the following disclaimer in the documentation
21 * and/or other materials provided with the distribution.
22 * 3. The name of the author may not be used to endorse or promote products
23 * derived from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
28 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
30 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
33 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
34 * OF SUCH DAMAGE.
35 *
36 * This file is part of the lwIP TCP/IP stack.
37 *
38 * Author: Adam Dunkels <adam@sics.se>
39 *
40 */
41  
42 #ifndef LWIP_HDR_NETIF_ETHARP_H
43 #define LWIP_HDR_NETIF_ETHARP_H
44  
45 #include "lwip/opt.h"
46  
47 #if LWIP_ARP || LWIP_ETHERNET /* don't build if not configured for use in lwipopts.h */
48  
49 #include "lwip/pbuf.h"
50 #include "lwip/ip4_addr.h"
51 #include "lwip/netif.h"
52 #include "lwip/ip4.h"
53 #include "lwip/prot/ethernet.h"
54  
55 #ifdef __cplusplus
56 extern "C" {
57 #endif
58  
59 #if LWIP_IPV4 && LWIP_ARP /* don't build if not configured for use in lwipopts.h */
60  
61 #include "lwip/prot/etharp.h"
62  
63 /** 1 seconds period */
64 #define ARP_TMR_INTERVAL 1000
65  
66 #if ARP_QUEUEING
67 /** struct for queueing outgoing packets for unknown address
68 * defined here to be accessed by memp.h
69 */
70 struct etharp_q_entry {
71 struct etharp_q_entry *next;
72 struct pbuf *p;
73 };
74 #endif /* ARP_QUEUEING */
75  
76 #define etharp_init() /* Compatibility define, no init needed. */
77 void etharp_tmr(void);
78 s8_t etharp_find_addr(struct netif *netif, const ip4_addr_t *ipaddr,
79 struct eth_addr **eth_ret, const ip4_addr_t **ip_ret);
80 u8_t etharp_get_entry(u8_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_addr **eth_ret);
81 err_t etharp_output(struct netif *netif, struct pbuf *q, const ip4_addr_t *ipaddr);
82 err_t etharp_query(struct netif *netif, const ip4_addr_t *ipaddr, struct pbuf *q);
83 err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr);
84 /** For Ethernet network interfaces, we might want to send "gratuitous ARP";
85 * this is an ARP packet sent by a node in order to spontaneously cause other
86 * nodes to update an entry in their ARP cache.
87 * From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
88 #define etharp_gratuitous(netif) etharp_request((netif), netif_ip4_addr(netif))
89 void etharp_cleanup_netif(struct netif *netif);
90  
91 #if ETHARP_SUPPORT_STATIC_ENTRIES
92 err_t etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr);
93 err_t etharp_remove_static_entry(const ip4_addr_t *ipaddr);
94 #endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
95  
96 #endif /* LWIP_IPV4 && LWIP_ARP */
97  
98 void etharp_input(struct pbuf *p, struct netif *netif);
99  
100 #ifdef __cplusplus
101 }
102 #endif
103  
104 #endif /* LWIP_ARP || LWIP_ETHERNET */
105  
106 #endif /* LWIP_HDR_NETIF_ETHARP_H */