f7323aebe8
base/inet.hh:
tcp/udp/ip checksums are calculated/manipulated in NBO always,
so there's no need to convert to host endian.
--HG--
extra : convert_revision : 13d6aff025a6c072d9d829c2e9fad4f13399b1f7
407 lines
13 KiB
C++
407 lines
13 KiB
C++
/*
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* Copyright (c) 2002-2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BASE_INET_HH__
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#define __BASE_INET_HH__
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#include <iosfwd>
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#include <string>
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#include <utility>
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#include <vector>
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#include "base/range.hh"
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#include "dev/etherpkt.hh"
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#include "sim/host.hh"
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#include "dnet/os.h"
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#include "dnet/eth.h"
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#include "dnet/ip.h"
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#include "dnet/ip6.h"
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#include "dnet/addr.h"
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#include "dnet/arp.h"
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#include "dnet/icmp.h"
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#include "dnet/tcp.h"
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#include "dnet/udp.h"
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#include "dnet/intf.h"
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#include "dnet/route.h"
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#include "dnet/fw.h"
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#include "dnet/blob.h"
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#include "dnet/rand.h"
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namespace Net {
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/*
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* Ethernet Stuff
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*/
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struct EthAddr : protected eth_addr
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{
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protected:
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void parse(const std::string &addr);
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public:
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EthAddr();
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EthAddr(const uint8_t ea[ETH_ADDR_LEN]);
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EthAddr(const eth_addr &ea);
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EthAddr(const std::string &addr);
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const EthAddr &operator=(const eth_addr &ea);
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const EthAddr &operator=(const std::string &addr);
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int size() const { return sizeof(eth_addr); }
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const uint8_t *bytes() const { return &data[0]; }
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uint8_t *bytes() { return &data[0]; }
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const uint8_t *addr() const { return &data[0]; }
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bool unicast() const { return data[0] == 0x00; }
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bool multicast() const { return data[0] == 0x01; }
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bool broadcast() const { return data[0] == 0xff; }
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std::string string() const;
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operator uint64_t() const
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{
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uint64_t reg = 0;
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reg |= ((uint64_t)data[0]) << 40;
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reg |= ((uint64_t)data[1]) << 32;
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reg |= ((uint64_t)data[2]) << 24;
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reg |= ((uint64_t)data[3]) << 16;
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reg |= ((uint64_t)data[4]) << 8;
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reg |= ((uint64_t)data[5]) << 0;
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return reg;
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}
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};
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std::ostream &operator<<(std::ostream &stream, const EthAddr &ea);
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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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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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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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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + size(); }
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};
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class EthPtr
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{
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protected:
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friend class IpPtr;
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PacketPtr p;
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public:
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EthPtr() {}
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EthPtr(const PacketPtr &ptr) : p(ptr) { }
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EthHdr *operator->() { return (EthHdr *)p->data; }
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EthHdr &operator*() { return *(EthHdr *)p->data; }
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operator EthHdr *() { return (EthHdr *)p->data; }
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const EthHdr *operator->() const { return (const EthHdr *)p->data; }
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const EthHdr &operator*() const { return *(const EthHdr *)p->data; }
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operator const EthHdr *() const { return (const EthHdr *)p->data; }
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const EthPtr &operator=(const PacketPtr &ptr) { p = ptr; return *this; }
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const PacketPtr packet() const { return p; }
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PacketPtr 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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};
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/*
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* IP Stuff
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*/
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struct IpOpt;
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struct IpHdr : public ip_hdr
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{
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uint8_t version() const { return ip_v; }
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uint8_t hlen() const { return ip_hl * 4; }
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uint8_t tos() const { return ip_tos; }
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uint16_t len() const { return ntohs(ip_len); }
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uint16_t id() const { return ntohs(ip_id); }
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uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
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uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
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uint8_t ttl() const { return ip_ttl; }
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uint8_t proto() const { return ip_p; }
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uint16_t sum() const { return ip_sum; }
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uint32_t src() const { return ntohl(ip_src); }
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uint32_t dst() const { return ntohl(ip_dst); }
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void sum(uint16_t sum) { ip_sum = sum; }
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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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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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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + size(); }
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};
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class IpPtr
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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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PacketPtr p;
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const IpHdr *h() const
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{ return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
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IpHdr *h() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
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void set(const PacketPtr &ptr)
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{
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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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else
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p = 0;
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}
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public:
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IpPtr() {}
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IpPtr(const PacketPtr &ptr) { set(ptr); }
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IpPtr(const EthPtr &ptr) { set(ptr.p); }
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IpPtr(const IpPtr &ptr) : p(ptr.p) { }
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IpHdr *operator->() { return h(); }
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IpHdr &operator*() { return *h(); }
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operator IpHdr *() { return h(); }
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const IpHdr *operator->() const { return h(); }
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const IpHdr &operator*() const { return *h(); }
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operator const IpHdr *() const { return h(); }
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const IpPtr &operator=(const PacketPtr &ptr) { set(ptr); return *this; }
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const IpPtr &operator=(const EthPtr &ptr) { set(ptr.p); return *this; }
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const IpPtr &operator=(const IpPtr &ptr) { p = ptr.p; return *this; }
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const PacketPtr packet() const { return p; }
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PacketPtr 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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operator bool() { return p; }
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};
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uint16_t cksum(const IpPtr &ptr);
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struct IpOpt : public ip_opt
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{
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uint8_t type() const { return opt_type; }
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uint8_t typeNumber() const { return IP_OPT_NUMBER(opt_type); }
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uint8_t typeClass() const { return IP_OPT_CLASS(opt_type); }
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uint8_t typeCopied() const { return IP_OPT_COPIED(opt_type); }
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uint8_t len() const { return IP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
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bool isNumber(int num) const { return typeNumber() == IP_OPT_NUMBER(num); }
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bool isClass(int cls) const { return typeClass() == IP_OPT_CLASS(cls); }
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bool isCopied(int cpy) const { return typeCopied() == IP_OPT_COPIED(cpy); }
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const uint8_t *data() const { return opt_data.data8; }
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void sec(ip_opt_data_sec &sec) const;
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void lsrr(ip_opt_data_rr &rr) const;
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void ssrr(ip_opt_data_rr &rr) const;
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void ts(ip_opt_data_ts &ts) const;
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uint16_t satid() const { return ntohs(opt_data.satid); }
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uint16_t mtup() const { return ntohs(opt_data.mtu); }
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uint16_t mtur() const { return ntohs(opt_data.mtu); }
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void tr(ip_opt_data_tr &tr) const;
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const uint32_t *addext() const { return &opt_data.addext[0]; }
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uint16_t rtralt() const { return ntohs(opt_data.rtralt); }
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void sdb(std::vector<uint32_t> &vec) const;
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};
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/*
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* TCP Stuff
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*/
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struct TcpOpt;
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struct TcpHdr : public tcp_hdr
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{
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uint16_t sport() const { return ntohs(th_sport); }
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uint16_t dport() const { return ntohs(th_dport); }
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uint32_t seq() const { return ntohl(th_seq); }
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uint32_t ack() const { return ntohl(th_ack); }
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uint8_t off() const { return th_off; }
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uint8_t flags() const { return th_flags & 0x3f; }
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uint16_t win() const { return ntohs(th_win); }
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uint16_t sum() const { return th_sum; }
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uint16_t urp() const { return ntohs(th_urp); }
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void sum(uint16_t sum) { th_sum = sum; }
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bool options(std::vector<const TcpOpt *> &vec) const;
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int size() const { return off(); }
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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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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + size(); }
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};
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class TcpPtr
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{
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protected:
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PacketPtr p;
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int off;
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const TcpHdr *h() const { return (const TcpHdr *)(p->data + off); }
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TcpHdr *h() { return (TcpHdr *)(p->data + off); }
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void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
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void set(const IpPtr &ptr)
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{
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if (ptr->proto() == IP_PROTO_TCP)
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set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
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else
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set(0, 0);
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}
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public:
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TcpPtr() {}
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TcpPtr(const IpPtr &ptr) { set(ptr); }
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TcpPtr(const TcpPtr &ptr) : p(ptr.p), off(ptr.off) {}
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TcpHdr *operator->() { return h(); }
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TcpHdr &operator*() { return *h(); }
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operator TcpHdr *() { return h(); }
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const TcpHdr *operator->() const { return h(); }
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const TcpHdr &operator*() const { return *h(); }
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operator const TcpHdr *() const { return h(); }
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const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
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const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t.off); return *this; }
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const PacketPtr packet() const { return p; }
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PacketPtr 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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operator bool() { return p; }
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};
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uint16_t cksum(const TcpPtr &ptr);
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typedef Range<uint16_t> SackRange;
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struct TcpOpt : public tcp_opt
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{
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uint8_t type() const { return opt_type; }
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uint8_t len() const { return TCP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
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bool isopt(int opt) const { return type() == opt; }
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const uint8_t *data() const { return opt_data.data8; }
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uint16_t mss() const { return ntohs(opt_data.mss); }
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uint8_t wscale() const { return opt_data.wscale; }
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bool sack(std::vector<SackRange> &vec) const;
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uint32_t echo() const { return ntohl(opt_data.echo); }
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uint32_t tsval() const { return ntohl(opt_data.timestamp[0]); }
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uint32_t tsecr() const { return ntohl(opt_data.timestamp[1]); }
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uint32_t cc() const { return ntohl(opt_data.cc); }
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uint8_t cksum() const{ return opt_data.cksum; }
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const uint8_t *md5() const { return opt_data.md5; }
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int size() const { return len(); }
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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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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + size(); }
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};
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/*
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* UDP Stuff
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*/
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struct UdpHdr : public udp_hdr
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{
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uint16_t sport() const { return ntohs(uh_sport); }
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uint16_t dport() const { return ntohs(uh_dport); }
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uint16_t len() const { return ntohs(uh_ulen); }
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uint16_t sum() const { return uh_sum; }
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void sum(uint16_t sum) { uh_sum = sum; }
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int size() const { return sizeof(udp_hdr); }
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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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uint8_t *bytes() { return (uint8_t *)this; }
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uint8_t *payload() { return bytes() + size(); }
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};
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class UdpPtr
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{
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protected:
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PacketPtr p;
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int off;
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const UdpHdr *h() const { return (const UdpHdr *)(p->data + off); }
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UdpHdr *h() { return (UdpHdr *)(p->data + off); }
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void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
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void set(const IpPtr &ptr)
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{
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if (ptr->proto() == IP_PROTO_UDP)
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set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
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else
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set(0, 0);
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}
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public:
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UdpPtr() {}
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UdpPtr(const IpPtr &ptr) { set(ptr); }
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UdpPtr(const UdpPtr &ptr) : p(ptr.p), off(ptr.off) {}
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UdpHdr *operator->() { return h(); }
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UdpHdr &operator*() { return *h(); }
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operator UdpHdr *() { return h(); }
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const UdpHdr *operator->() const { return h(); }
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const UdpHdr &operator*() const { return *h(); }
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operator const UdpHdr *() const { return h(); }
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const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
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const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t.off); return *this; }
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const PacketPtr packet() const { return p; }
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PacketPtr 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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operator bool() { return p; }
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};
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uint16_t cksum(const UdpPtr &ptr);
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/* namespace Net */ }
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#endif // __BASE_INET_HH__
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