base: Add support for ipv6 into inet.hh/inet.cc
This commit is contained in:
Geoffrey Blake
parent
397dc784fd
commit
fb0496498d
132
src/base/inet.cc
132
src/base/inet.cc
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@ -1,4 +1,16 @@
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/*
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* Copyright (c) 2013 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* Copyright (c) 2010 Advanced Micro Devices, Inc.
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* All rights reserved.
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@ -28,6 +40,7 @@
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*
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* Authors: Nathan Binkert
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* Gabe Black
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* Geoffrey Blake
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*/
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#include <cstddef>
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@ -204,13 +217,42 @@ __tu_cksum(const IpPtr &ip)
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return ip_cksum_carry(sum);
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}
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uint16_t
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__tu_cksum6(const Ip6Ptr &ip6)
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{
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int tcplen = ip6->plen() - ip6->extensionLength();
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int sum = ip_cksum_add(ip6->payload(), tcplen, 0);
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sum = ip_cksum_add(ip6->src(), 32, sum);
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sum += htons(ip6->proto() + tcplen);
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return ip_cksum_carry(sum);
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}
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uint16_t
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cksum(const TcpPtr &tcp)
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{ return __tu_cksum(IpPtr(tcp.packet())); }
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{
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if (IpPtr(tcp.packet())) {
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return __tu_cksum(IpPtr(tcp.packet()));
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} else if (Ip6Ptr(tcp.packet())) {
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return __tu_cksum6(Ip6Ptr(tcp.packet()));
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} else {
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assert(0);
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}
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// Should never reach here
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return 0;
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}
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uint16_t
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cksum(const UdpPtr &udp)
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{ return __tu_cksum(IpPtr(udp.packet())); }
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{
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if (IpPtr(udp.packet())) {
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return __tu_cksum(IpPtr(udp.packet()));
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} else if (Ip6Ptr(udp.packet())) {
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return __tu_cksum6(Ip6Ptr(udp.packet()));
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} else {
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assert(0);
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}
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return 0;
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}
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bool
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IpHdr::options(vector<const IpOpt *> &vec) const
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@ -233,6 +275,82 @@ IpHdr::options(vector<const IpOpt *> &vec) const
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return true;
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}
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#define IP6_EXTENSION(nxt) (nxt == IP_PROTO_HOPOPTS) ? true : \
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(nxt == IP_PROTO_ROUTING) ? true : \
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(nxt == IP_PROTO_FRAGMENT) ? true : \
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(nxt == IP_PROTO_AH) ? true : \
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(nxt == IP_PROTO_ESP) ? true: \
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(nxt == IP_PROTO_DSTOPTS) ? true : false
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/* Scan the IP6 header for all header extensions
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* and return the number of headers found
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*/
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int
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Ip6Hdr::extensionLength() const
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{
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const uint8_t *data = bytes() + IP6_HDR_LEN;
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uint8_t nxt = ip6_nxt;
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int len = 0;
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int all = plen();
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while (IP6_EXTENSION(nxt)) {
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const Ip6Opt *ext = (const Ip6Opt *)data;
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nxt = ext->nxt();
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len += ext->len();
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data += ext->len();
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all -= ext->len();
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assert(all >= 0);
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}
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return len;
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}
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/* Scan the IP6 header for a particular extension
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* header type and return a pointer to it if it
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* exists, otherwise return NULL
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*/
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const Ip6Opt*
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Ip6Hdr::getExt(uint8_t ext_type) const
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{
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const uint8_t *data = bytes() + IP6_HDR_LEN;
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uint8_t nxt = ip6_nxt;
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Ip6Opt* opt = NULL;
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int all = plen();
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while (IP6_EXTENSION(nxt)) {
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opt = (Ip6Opt *)data;
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if (nxt == ext_type) {
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break;
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}
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nxt = opt->nxt();
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data += opt->len();
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all -= opt->len();
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opt = NULL;
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assert(all >= 0);
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}
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return (const Ip6Opt*)opt;
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}
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/* Scan the IP6 header and any extension headers
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* to find what type of Layer 4 header exists
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* after this header
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*/
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uint8_t
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Ip6Hdr::proto() const
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{
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const uint8_t *data = bytes() + IP6_HDR_LEN;
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uint8_t nxt = ip6_nxt;
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int all = plen();
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while (IP6_EXTENSION(nxt)) {
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const Ip6Opt *ext = (const Ip6Opt *)data;
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nxt = ext->nxt();
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data += ext->len();
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all -= ext->len();
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assert(all >= 0);
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}
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return nxt;
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}
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bool
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TcpHdr::options(vector<const TcpOpt *> &vec) const
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{
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@ -260,6 +378,7 @@ hsplit(const EthPacketPtr &ptr)
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int split_point = 0;
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IpPtr ip(ptr);
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Ip6Ptr ip6(ptr);
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if (ip) {
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split_point = ip.pstart();
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@ -270,6 +389,15 @@ hsplit(const EthPacketPtr &ptr)
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UdpPtr udp(ip);
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if (udp)
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split_point = udp.pstart();
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} else if (ip6) {
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split_point = ip6.pstart();
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TcpPtr tcp(ip6);
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if (tcp)
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split_point = tcp.pstart();
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UdpPtr udp(ip6);
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if (udp)
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split_point = udp.pstart();
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}
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return split_point;
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}
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239
src/base/inet.hh
239
src/base/inet.hh
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@ -1,4 +1,16 @@
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/*
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* Copyright (c) 2013 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* Copyright (c) 2010 Advanced Micro Devices, Inc.
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* All rights reserved.
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@ -29,6 +41,7 @@
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* Authors: Nathan Binkert
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* Steve Reinhardt
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* Gabe Black
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* Geoffrey Blake
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*/
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#ifndef __BASE_INET_HH__
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@ -104,11 +117,31 @@ bool operator==(const EthAddr &left, const EthAddr &right);
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struct EthHdr : public eth_hdr
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{
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uint16_t type() const { return ntohs(eth_type); }
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bool isVlan() const { return (ntohs(eth_type) == ETH_TYPE_8021Q); }
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uint16_t type() const {
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if (!isVlan())
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return ntohs(eth_type);
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else
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// L3 type is now 16 bytes into the hdr with 802.1Q
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// instead of 12. dnet/eth.h only supports 802.1
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return ntohs(*((uint16_t*)(((uint8_t *)this) + 16)));
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}
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uint16_t vlanId() const {
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if (isVlan())
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return ntohs(*((uint16_t*)(((uint8_t *)this) + 14)));
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else
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return 0x0000;
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}
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const EthAddr &src() const { return *(EthAddr *)ð_src; }
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const EthAddr &dst() const { return *(EthAddr *)ð_dst; }
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int size() const { return sizeof(eth_hdr); }
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int size() const {
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if (!isVlan())
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return sizeof(eth_hdr);
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else
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return (sizeof(eth_hdr)+4);
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}
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const uint8_t *bytes() const { return (const uint8_t *)this; }
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const uint8_t *payload() const { return bytes() + size(); }
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@ -120,6 +153,7 @@ class EthPtr
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{
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protected:
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friend class IpPtr;
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friend class Ip6Ptr;
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EthPacketPtr p;
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public:
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@ -226,7 +260,6 @@ struct IpHdr : public ip_hdr
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void id(uint16_t _id) { ip_id = htons(_id); }
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void len(uint16_t _len) { ip_len = htons(_len); }
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bool options(std::vector<const IpOpt *> &vec) const;
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int size() const { return hlen(); }
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@ -242,30 +275,36 @@ class IpPtr
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friend class TcpPtr;
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friend class UdpPtr;
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EthPacketPtr p;
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bool eth_hdr_vlan;
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void set(const EthPacketPtr &ptr)
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{
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p = 0;
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eth_hdr_vlan = false;
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if (ptr) {
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EthHdr *eth = (EthHdr *)ptr->data;
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if (eth->type() == ETH_TYPE_IP)
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p = ptr;
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if (eth->isVlan())
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eth_hdr_vlan = true;
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}
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}
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public:
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IpPtr() : p(0) {}
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IpPtr(const EthPacketPtr &ptr) : p(0) { set(ptr); }
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IpPtr(const EthPtr &ptr) : p(0) { set(ptr.p); }
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IpPtr(const IpPtr &ptr) : p(ptr.p) { }
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IpPtr() : p(0), eth_hdr_vlan(false) {}
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IpPtr(const EthPacketPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr); }
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IpPtr(const EthPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr.p); }
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IpPtr(const IpPtr &ptr) : p(ptr.p), eth_hdr_vlan(ptr.eth_hdr_vlan) { }
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IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
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IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr) +
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((eth_hdr_vlan) ? 4 : 0)); }
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IpHdr *operator->() { return get(); }
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IpHdr &operator*() { return *get(); }
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const IpHdr *get() const
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{ return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
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{ return (const IpHdr *)(p->data + sizeof(eth_hdr) +
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((eth_hdr_vlan) ? 4 : 0)); }
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const IpHdr *operator->() const { return get(); }
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const IpHdr &operator*() const { return *get(); }
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@ -277,8 +316,8 @@ class IpPtr
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EthPacketPtr packet() { return p; }
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bool operator!() const { return !p; }
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operator bool() const { return p; }
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int off() const { return sizeof(eth_hdr); }
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int pstart() const { return off() + get()->size(); }
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int off() const { return (sizeof(eth_hdr) + ((eth_hdr_vlan) ? 4 : 0)); }
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int pstart() const { return (off() + get()->size()); }
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};
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uint16_t cksum(const IpPtr &ptr);
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@ -309,6 +348,152 @@ struct IpOpt : public ip_opt
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void sdb(std::vector<uint32_t> &vec) const;
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};
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/*
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* Ip6 Classes
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*/
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struct Ip6Opt;
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struct Ip6Hdr : public ip6_hdr
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{
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uint8_t version() const { return ip6_vfc; }
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uint32_t flow() const { return ntohl(ip6_flow); }
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uint16_t plen() const { return ntohs(ip6_plen); }
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uint16_t hlen() const { return IP6_HDR_LEN; }
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uint8_t nxt() const { return ip6_nxt; }
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uint8_t hlim() const { return ip6_hlim; }
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const uint8_t* src() const { return ip6_src.data; }
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const uint8_t* dst() const { return ip6_dst.data; }
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int extensionLength() const;
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const Ip6Opt* getExt(uint8_t ext) const;
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const Ip6Opt* fragmentExt() const { return getExt(IP_PROTO_FRAGMENT); }
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const Ip6Opt* rtTypeExt() const { return getExt(IP_PROTO_ROUTING); }
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const Ip6Opt* dstOptExt() const { return getExt(IP_PROTO_DSTOPTS); }
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uint8_t proto() const;
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void plen(uint16_t _plen) { ip6_plen = htons(_plen); }
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int size() const { return IP6_HDR_LEN + extensionLength(); }
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const uint8_t *bytes() const { return (const uint8_t *)this; }
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const uint8_t *payload() const { return bytes() + IP6_HDR_LEN
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+ extensionLength(); }
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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + IP6_HDR_LEN
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+ extensionLength(); }
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};
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class Ip6Ptr
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{
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protected:
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friend class TcpPtr;
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friend class UdpPtr;
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EthPacketPtr p;
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bool eth_hdr_vlan;
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void set(const EthPacketPtr &ptr)
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{
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p = 0;
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eth_hdr_vlan = false;
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if (ptr) {
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EthHdr *eth = (EthHdr *)ptr->data;
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if (eth->type() == ETH_TYPE_IPV6)
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p = ptr;
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if (eth->isVlan())
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eth_hdr_vlan = true;
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}
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}
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public:
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Ip6Ptr() : p(0), eth_hdr_vlan(false) {}
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Ip6Ptr(const EthPacketPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr); }
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Ip6Ptr(const EthPtr &ptr) : p(0), eth_hdr_vlan(false) { set(ptr.p); }
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Ip6Ptr(const Ip6Ptr &ptr) : p(ptr.p), eth_hdr_vlan(ptr.eth_hdr_vlan) { }
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Ip6Hdr *get() { return (Ip6Hdr *)(p->data + sizeof(eth_hdr)
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+ ((eth_hdr_vlan) ? 4 : 0)); }
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Ip6Hdr *operator->() { return get(); }
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Ip6Hdr &operator*() { return *get(); }
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const Ip6Hdr *get() const
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{ return (const Ip6Hdr *)(p->data + sizeof(eth_hdr)
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+ ((eth_hdr_vlan) ? 4 : 0)); }
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const Ip6Hdr *operator->() const { return get(); }
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const Ip6Hdr &operator*() const { return *get(); }
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const Ip6Ptr &operator=(const EthPacketPtr &ptr)
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{ set(ptr); return *this; }
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const Ip6Ptr &operator=(const EthPtr &ptr)
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{ set(ptr.p); return *this; }
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const Ip6Ptr &operator=(const Ip6Ptr &ptr)
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{ p = ptr.p; return *this; }
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const EthPacketPtr packet() const { return p; }
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EthPacketPtr packet() { return p; }
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bool operator!() const { return !p; }
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operator bool() const { return p; }
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int off() const { return sizeof(eth_hdr) + ((eth_hdr_vlan) ? 4 : 0); }
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int pstart() const { return off() + get()->size(); }
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};
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// Dnet supplied ipv6 opt header is incomplete and
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// newer NIC card filters expect a more robust
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// ipv6 header option declaration.
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struct ip6_opt_fragment {
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uint16_t offlg;
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uint32_t ident;
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};
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struct ip6_opt_routing_type2 {
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uint8_t type;
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uint8_t segleft;
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uint32_t reserved;
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ip6_addr_t addr;
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};
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#define HOME_ADDRESS_OPTION 0xC9
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struct ip6_opt_dstopts {
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uint8_t type;
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uint8_t length;
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ip6_addr_t addr;
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} __attribute__((packed));
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struct ip6_opt_hdr
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{
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uint8_t ext_nxt;
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uint8_t ext_len;
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union {
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struct ip6_opt_fragment fragment;
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struct ip6_opt_routing_type2 rtType2;
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struct ip6_opt_dstopts dstOpts;
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} ext_data;
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} __attribute__((packed));
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struct Ip6Opt : public ip6_opt_hdr
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{
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uint8_t nxt() const { return ext_nxt; }
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uint8_t extlen() const { return ext_len; }
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uint8_t len() const { return extlen() + 8; }
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// Supporting the types of header extensions likely to be encountered:
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// fragment, routing type 2 and dstopts.
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// Routing type 2
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uint8_t rtType2Type() const { return ext_data.rtType2.type; }
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uint8_t rtType2SegLft() const { return ext_data.rtType2.segleft; }
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const uint8_t* rtType2Addr() const { return ext_data.rtType2.addr.data; }
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// Fragment
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uint16_t fragmentOfflg() const { return ntohs(ext_data.fragment.offlg); }
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uint32_t fragmentIdent() const { return ntohl(ext_data.fragment.ident); }
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// Dst Options/Home Address Option
|
||||
uint8_t dstOptType() const { return ext_data.dstOpts.type; }
|
||||
uint8_t dstOptLength() const { return ext_data.dstOpts.length; }
|
||||
const uint8_t* dstOptAddr() const { return ext_data.dstOpts.addr.data; }
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* TCP Stuff
|
||||
*/
|
||||
|
|
@ -319,7 +504,7 @@ struct TcpHdr : public tcp_hdr
|
|||
uint16_t dport() const { return ntohs(th_dport); }
|
||||
uint32_t seq() const { return ntohl(th_seq); }
|
||||
uint32_t ack() const { return ntohl(th_ack); }
|
||||
uint8_t off() const { return th_off; }
|
||||
uint8_t off() const { return th_off*4; }
|
||||
uint8_t flags() const { return th_flags & 0x3f; }
|
||||
uint16_t win() const { return ntohs(th_win); }
|
||||
uint16_t sum() const { return th_sum; }
|
||||
|
|
@ -348,7 +533,14 @@ class TcpPtr
|
|||
void set(const IpPtr &ptr)
|
||||
{
|
||||
if (ptr && ptr->proto() == IP_PROTO_TCP)
|
||||
set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
|
||||
set(ptr.p, ptr.pstart());
|
||||
else
|
||||
set(0, 0);
|
||||
}
|
||||
void set(const Ip6Ptr &ptr)
|
||||
{
|
||||
if (ptr && ptr->proto() == IP_PROTO_TCP)
|
||||
set(ptr.p, ptr.pstart());
|
||||
else
|
||||
set(0, 0);
|
||||
}
|
||||
|
|
@ -356,6 +548,7 @@ class TcpPtr
|
|||
public:
|
||||
TcpPtr() : p(0), _off(0) {}
|
||||
TcpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
|
||||
TcpPtr(const Ip6Ptr &ptr) : p(0), _off(0) { set(ptr); }
|
||||
TcpPtr(const TcpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
|
||||
|
||||
TcpHdr *get() { return (TcpHdr *)(p->data + _off); }
|
||||
|
|
@ -366,8 +559,10 @@ class TcpPtr
|
|||
const TcpHdr *operator->() const { return get(); }
|
||||
const TcpHdr &operator*() const { return *get(); }
|
||||
|
||||
const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
|
||||
const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t._off); return *this; }
|
||||
const TcpPtr &operator=(const IpPtr &i)
|
||||
{ set(i); return *this; }
|
||||
const TcpPtr &operator=(const TcpPtr &t)
|
||||
{ set(t.p, t._off); return *this; }
|
||||
|
||||
const EthPacketPtr packet() const { return p; }
|
||||
EthPacketPtr packet() { return p; }
|
||||
|
|
@ -434,7 +629,14 @@ class UdpPtr
|
|||
void set(const IpPtr &ptr)
|
||||
{
|
||||
if (ptr && ptr->proto() == IP_PROTO_UDP)
|
||||
set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
|
||||
set(ptr.p, ptr.pstart());
|
||||
else
|
||||
set(0, 0);
|
||||
}
|
||||
void set(const Ip6Ptr &ptr)
|
||||
{
|
||||
if (ptr && ptr->proto() == IP_PROTO_UDP)
|
||||
set(ptr.p, ptr.pstart());
|
||||
else
|
||||
set(0, 0);
|
||||
}
|
||||
|
|
@ -442,6 +644,7 @@ class UdpPtr
|
|||
public:
|
||||
UdpPtr() : p(0), _off(0) {}
|
||||
UdpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
|
||||
UdpPtr(const Ip6Ptr &ptr) : p(0), _off(0) { set(ptr); }
|
||||
UdpPtr(const UdpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
|
||||
|
||||
UdpHdr *get() { return (UdpHdr *)(p->data + _off); }
|
||||
|
|
@ -453,7 +656,8 @@ class UdpPtr
|
|||
const UdpHdr &operator*() const { return *get(); }
|
||||
|
||||
const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
|
||||
const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t._off); return *this; }
|
||||
const UdpPtr &operator=(const UdpPtr &t)
|
||||
{ set(t.p, t._off); return *this; }
|
||||
|
||||
const EthPacketPtr packet() const { return p; }
|
||||
EthPacketPtr packet() { return p; }
|
||||
|
|
@ -463,6 +667,7 @@ class UdpPtr
|
|||
int pstart() const { return off() + get()->size(); }
|
||||
};
|
||||
|
||||
uint16_t __tu_cksum6(const Ip6Ptr &ip6);
|
||||
uint16_t __tu_cksum(const IpPtr &ip);
|
||||
uint16_t cksum(const UdpPtr &ptr);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue