diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/core/ipv6/ethip6.c')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/core/ipv6/ethip6.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/core/ipv6/ethip6.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/core/ipv6/ethip6.c new file mode 100644 index 0000000..8f9a91b --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/core/ipv6/ethip6.c @@ -0,0 +1,118 @@ +/** + * @file + * + * Ethernet output for IPv6. Uses ND tables for link-layer addressing. + */ + +/* + * Copyright (c) 2010 Inico Technologies Ltd. + * 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: Ivan Delamer <delamer@inicotech.com> + * + * + * Please coordinate changes and requests with Ivan Delamer + * <delamer@inicotech.com> + */ + +#include "lwip/opt.h" + +#if LWIP_IPV6 && LWIP_ETHERNET + +#include "lwip/ethip6.h" +#include "lwip/nd6.h" +#include "lwip/pbuf.h" +#include "lwip/ip6.h" +#include "lwip/ip6_addr.h" +#include "lwip/inet_chksum.h" +#include "lwip/netif.h" +#include "lwip/icmp6.h" +#include "lwip/prot/ethernet.h" +#include "netif/ethernet.h" + +#include <string.h> + +/** + * Resolve and fill-in Ethernet address header for outgoing IPv6 packet. + * + * For IPv6 multicast, corresponding Ethernet addresses + * are selected and the packet is transmitted on the link. + * + * For unicast addresses, ask the ND6 module what to do. It will either let us + * send the the packet right away, or queue the packet for later itself, unless + * an error occurs. + * + * @todo anycast addresses + * + * @param netif The lwIP network interface which the IP packet will be sent on. + * @param q The pbuf(s) containing the IP packet to be sent. + * @param ip6addr The IP address of the packet destination. + * + * @return + * - ERR_OK or the return value of @ref nd6_get_next_hop_addr_or_queue. + */ +err_t +ethip6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr) +{ + struct eth_addr dest; + const u8_t *hwaddr; + err_t result; + + /* multicast destination IP address? */ + if (ip6_addr_ismulticast(ip6addr)) { + /* Hash IP multicast address to MAC address.*/ + dest.addr[0] = 0x33; + dest.addr[1] = 0x33; + dest.addr[2] = ((const u8_t *)(&(ip6addr->addr[3])))[0]; + dest.addr[3] = ((const u8_t *)(&(ip6addr->addr[3])))[1]; + dest.addr[4] = ((const u8_t *)(&(ip6addr->addr[3])))[2]; + dest.addr[5] = ((const u8_t *)(&(ip6addr->addr[3])))[3]; + + /* Send out. */ + return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6); + } + + /* We have a unicast destination IP address */ + /* @todo anycast? */ + + /* Ask ND6 what to do with the packet. */ + result = nd6_get_next_hop_addr_or_queue(netif, q, ip6addr, &hwaddr); + if (result != ERR_OK) { + return result; + } + + /* If no hardware address is returned, nd6 has queued the packet for later. */ + if (hwaddr == NULL) { + return ERR_OK; + } + + /* Send out the packet using the returned hardware address. */ + SMEMCPY(dest.addr, hwaddr, 6); + return ethernet_output(netif, q, (const struct eth_addr*)(netif->hwaddr), &dest, ETHTYPE_IPV6); +} + +#endif /* LWIP_IPV6 && LWIP_ETHERNET */ |