04c9079954
Because of this, it will take some time to detangle the licensing under net/. Many new features, original features were added to the NuttX network. Clearly, any references to Adam Dunkels in the files that implement these new features that have no counterpart in uIP 1.0 are errors. This PR removes the references and converts the license headers to Apache 2.0 where possible. The affected files include only (1) the implementation of IPv6 (including neighbor support under ICMPv6) and (2) Raw sockets. Neither of these features are present in uIP 1.0 and the licenses can be freely updated.
237 lines
7.9 KiB
C
237 lines
7.9 KiB
C
/****************************************************************************
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* net/icmpv6/icmpv6_radvertise.c
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* Send an ICMPv6 Router Advertisement
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <string.h>
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#include <debug.h>
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#include <nuttx/net/netconfig.h>
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#include <nuttx/net/netstats.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/icmpv6.h>
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#include "netdev/netdev.h"
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#include "inet/inet.h"
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#include "utils/utils.h"
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#include "icmpv6/icmpv6.h"
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#ifdef CONFIG_NET_ICMPv6_ROUTER
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define IPv6BUF ((struct ipv6_hdr_s *)&dev->d_buf[NET_LL_HDRLEN(dev)])
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#define ICMPv6ADVERTISE \
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((struct icmpv6_router_advertise_s *)&dev->d_buf[NET_LL_HDRLEN(dev) + IPv6_HDRLEN])
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/****************************************************************************
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* Private Data
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****************************************************************************/
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#ifdef CONFIG_NET_ICMPv6_ROUTER_MANUAL
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static const net_ipv6addr_t g_ipv6_prefix =
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{
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HTONS(CONFIG_NET_ICMPv6_PREFIX_1),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_2),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_3),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_4),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_5),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_6),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_7),
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HTONS(CONFIG_NET_ICMPv6_PREFIX_8)
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};
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#endif /* CONFIG_NET_ICMPv6_ROUTER_MANUAL */
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: ipv6addr_mask
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*
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* Description:
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* Copy an IPv6 address under a mask
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*
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* Input Parameters:
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* dest - Location to return the masked address
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* src - The IPv6 address to mask
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* maksk - The address mask
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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#ifndef CONFIG_NET_ICMPv6_ROUTER_MANUAL
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static inline void ipv6addr_mask(FAR uint16_t *dest, FAR const uint16_t *src,
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FAR const uint16_t *mask)
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{
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int i;
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for (i = 0; i < 8; ++i)
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{
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dest[i] = src[i] & mask[i];
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}
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}
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#endif /* !CONFIG_NET_ICMPv6_ROUTER_MANUAL */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: icmpv6_radvertise
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*
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* Description:
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* Send an ICMPv6 Router Advertisement
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*
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* Input Parameters:
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* dev - The device driver structure containing the outgoing ICMPv6 packet
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* buffer
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*
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* Returned Value:
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* None
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*
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* Assumptions:
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* The network is locked
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*
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****************************************************************************/
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void icmpv6_radvertise(FAR struct net_driver_s *dev)
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{
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FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
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FAR struct icmpv6_router_advertise_s *adv;
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FAR struct icmpv6_srclladdr_s *srcaddr;
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FAR struct icmpv6_mtu_s *mtu;
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FAR struct icmpv6_prefixinfo_s *prefix;
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uint16_t lladdrsize;
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uint16_t l3size;
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/* Set up the IPv6 header */
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ipv6->vtc = 0x60; /* Version/traffic class (MS) */
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ipv6->tcf = 0; /* Traffic class (LS)/Flow label (MS) */
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ipv6->flow = 0; /* Flow label (LS) */
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/* Length excludes the IPv6 header */
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lladdrsize = netdev_lladdrsize(dev);
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l3size = sizeof(struct icmpv6_router_advertise_s) +
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SIZEOF_ICMPV6_SRCLLADDR_S(lladdrsize) +
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sizeof(struct icmpv6_mtu_s) +
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sizeof(struct icmpv6_prefixinfo_s);
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ipv6->len[0] = (l3size >> 8);
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ipv6->len[1] = (l3size & 0xff);
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ipv6->proto = IP_PROTO_ICMP6; /* Next header */
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ipv6->ttl = 255; /* Hop limit */
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/* Swap source for destination IP address, add our source IP address */
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net_ipv6addr_copy(ipv6->destipaddr, g_ipv6_allnodes);
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/* Source IP address must be set to link-local IP */
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icmpv6_linkipaddr(dev, ipv6->srcipaddr);
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/* Set up the ICMPv6 Router Advertise response */
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adv = ICMPv6ADVERTISE;
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adv->type = ICMPV6_ROUTER_ADVERTISE; /* Message type */
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adv->code = 0; /* Message qualifier */
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adv->hoplimit = 64; /* Current hop limit */
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adv->flags = ICMPv6_RADV_FLAG_M; /* Managed address flag. */
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adv->lifetime = HTONS(1800); /* Router lifetime */
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adv->reachable = 0; /* Reachable time */
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adv->retrans = 0; /* Retransmission timer */
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/* Set up the source address option */
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srcaddr = (FAR struct icmpv6_srclladdr_s *)
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((FAR uint8_t *)adv +
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sizeof(struct icmpv6_router_advertise_s));
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srcaddr->opttype = ICMPv6_OPT_SRCLLADDR;
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srcaddr->optlen = ICMPv6_OPT_OCTECTS(lladdrsize);
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memcpy(srcaddr->srclladdr, &dev->d_mac, lladdrsize);
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/* Set up the MTU option */
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mtu = (FAR struct icmpv6_mtu_s *)
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((FAR uint8_t *)srcaddr +
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SIZEOF_ICMPV6_SRCLLADDR_S(lladdrsize));
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mtu->opttype = ICMPv6_OPT_MTU;
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mtu->optlen = 1;
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mtu->reserved = 0;
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mtu->mtu = HTONL(dev->d_pktsize - dev->d_llhdrlen);
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/* Set up the prefix option */
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prefix = (FAR struct icmpv6_prefixinfo_s *)
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((FAR uint8_t *)mtu + sizeof(struct icmpv6_mtu_s));
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prefix->opttype = ICMPv6_OPT_PREFIX;
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prefix->optlen = 4;
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prefix->flags = ICMPv6_PRFX_FLAG_L | ICMPv6_PRFX_FLAG_A;
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prefix->vlifetime = HTONL(2592000);
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prefix->plifetime = HTONL(604800);
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prefix->reserved[0] = 0;
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prefix->reserved[1] = 0;
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#ifdef CONFIG_NET_ICMPv6_ROUTER_MANUAL
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/* Copy the configured prefex */
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prefix->preflen = CONFIG_NET_ICMPv6_PREFLEN;
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net_ipv6addr_copy(prefix->prefix, g_ipv6_prefix);
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#else
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/* Set the prefix and prefix length based on net driver IP and netmask */
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prefix->preflen = net_ipv6_mask2pref(dev->d_ipv6netmask);
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ipv6addr_mask(prefix->prefix, dev->d_ipv6addr, dev->d_ipv6netmask);
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#endif /* CONFIG_NET_ICMPv6_ROUTER_MANUAL */
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/* Calculate the checksum over both the ICMP header and payload */
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adv->chksum = 0;
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adv->chksum = ~icmpv6_chksum(dev, IPv6_HDRLEN);
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/* Set the size to the size of the IPv6 header and the payload size */
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dev->d_len = IPv6_HDRLEN + l3size;
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ninfo("Outgoing ICMPv6 Router Advertise length: %d (%d)\n",
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dev->d_len, (ipv6->len[0] << 8) | ipv6->len[1]);
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#ifdef CONFIG_NET_STATISTICS
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g_netstats.icmpv6.sent++;
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g_netstats.ipv6.sent++;
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#endif
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}
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#endif /* CONFIG_NET_ICMPv6_ROUTER */
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