1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * Copyright (c) 2010 Advanced Micro Devices, Inc. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Nathan Binkert 30 * Gabe Black 31 */ 32 33#include <cstdio> 34#include <sstream> 35#include <string> 36 37#include "base/cprintf.hh" 38#include "base/inet.hh" 39#include "base/types.hh" 40 41using namespace std; 42namespace Net { 43 44EthAddr::EthAddr() 45{ 46 memset(data, 0, ETH_ADDR_LEN); 47} 48 49EthAddr::EthAddr(const uint8_t ea[ETH_ADDR_LEN]) 50{ 51 *data = *ea; 52} 53 54EthAddr::EthAddr(const eth_addr &ea) 55{ 56 *data = *ea.data; 57} 58 59EthAddr::EthAddr(const std::string &addr) 60{ 61 parse(addr); 62} 63 64const EthAddr & 65EthAddr::operator=(const eth_addr &ea) 66{ 67 *data = *ea.data; 68 return *this; 69} 70 71const EthAddr & 72EthAddr::operator=(const std::string &addr) 73{ 74 parse(addr); 75 return *this; 76} 77 78void 79EthAddr::parse(const std::string &addr) 80{ 81 // the hack below is to make sure that ETH_ADDR_LEN is 6 otherwise 82 // the sscanf function won't work. 83 int bytes[ETH_ADDR_LEN == 6 ? ETH_ADDR_LEN : -1]; 84 if (sscanf(addr.c_str(), "%x:%x:%x:%x:%x:%x", &bytes[0], &bytes[1], 85 &bytes[2], &bytes[3], &bytes[4], &bytes[5]) != ETH_ADDR_LEN) { 86 memset(data, 0xff, ETH_ADDR_LEN); 87 return; 88 } 89 90 for (int i = 0; i < ETH_ADDR_LEN; ++i) { 91 if (bytes[i] & ~0xff) { 92 memset(data, 0xff, ETH_ADDR_LEN); 93 return; 94 } 95 96 data[i] = bytes[i]; 97 } 98} 99 100string 101EthAddr::string() const 102{ 103 stringstream stream; 104 stream << *this; 105 return stream.str(); 106} 107 108bool 109operator==(const EthAddr &left, const EthAddr &right) 110{ 111 return memcmp(left.bytes(), right.bytes(), ETH_ADDR_LEN); 112} 113 114ostream & 115operator<<(ostream &stream, const EthAddr &ea) 116{ 117 const uint8_t *a = ea.addr(); 118 ccprintf(stream, "%x:%x:%x:%x:%x:%x", a[0], a[1], a[2], a[3], a[4], a[5]); 119 return stream; 120} 121 122string 123IpAddress::string() const 124{ 125 stringstream stream; 126 stream << *this; 127 return stream.str(); 128} 129 130bool 131operator==(const IpAddress &left, const IpAddress &right) 132{ 133 return left.ip() == right.ip(); 134} 135 136ostream & 137operator<<(ostream &stream, const IpAddress &ia) 138{ 139 uint32_t ip = ia.ip(); 140 ccprintf(stream, "%x.%x.%x.%x",
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143 return stream; 144} 145 146string 147IpNetmask::string() const 148{ 149 stringstream stream; 150 stream << *this; 151 return stream.str(); 152} 153 154bool 155operator==(const IpNetmask &left, const IpNetmask &right) 156{ 157 return (left.ip() == right.ip()) && 158 (left.netmask() == right.netmask()); 159} 160 161ostream & 162operator<<(ostream &stream, const IpNetmask &in) 163{ 164 ccprintf(stream, "%s/%d", (const IpAddress &)in, in.netmask()); 165 return stream; 166} 167 168string 169IpWithPort::string() const 170{ 171 stringstream stream; 172 stream << *this; 173 return stream.str(); 174} 175 176bool 177operator==(const IpWithPort &left, const IpWithPort &right) 178{ 179 return (left.ip() == right.ip()) && (left.port() == right.port()); 180} 181 182ostream & 183operator<<(ostream &stream, const IpWithPort &iwp) 184{ 185 ccprintf(stream, "%s:%d", (const IpAddress &)iwp, iwp.port()); 186 return stream; 187} 188 189uint16_t 190cksum(const IpPtr &ptr) 191{ 192 int sum = ip_cksum_add(ptr->bytes(), ptr->hlen(), 0); 193 return ip_cksum_carry(sum); 194} 195 196uint16_t 197__tu_cksum(const IpPtr &ip) 198{ 199 int tcplen = ip->len() - ip->hlen(); 200 int sum = ip_cksum_add(ip->payload(), tcplen, 0); 201 sum = ip_cksum_add(&ip->ip_src, 8, sum); // source and destination 202 sum += htons(ip->ip_p + tcplen); 203 return ip_cksum_carry(sum); 204} 205 206uint16_t 207cksum(const TcpPtr &tcp) 208{ return __tu_cksum(IpPtr(tcp.packet())); } 209 210uint16_t 211cksum(const UdpPtr &udp) 212{ return __tu_cksum(IpPtr(udp.packet())); } 213 214bool 215IpHdr::options(vector<const IpOpt *> &vec) const 216{ 217 vec.clear(); 218 219 const uint8_t *data = bytes() + sizeof(struct ip_hdr); 220 int all = hlen() - sizeof(struct ip_hdr); 221 while (all > 0) { 222 const IpOpt *opt = (const IpOpt *)data; 223 int len = opt->len(); 224 if (all < len) 225 return false; 226 227 vec.push_back(opt); 228 all -= len; 229 data += len; 230 } 231 232 return true; 233} 234 235bool 236TcpHdr::options(vector<const TcpOpt *> &vec) const 237{ 238 vec.clear(); 239 240 const uint8_t *data = bytes() + sizeof(struct tcp_hdr); 241 int all = off() - sizeof(struct tcp_hdr); 242 while (all > 0) { 243 const TcpOpt *opt = (const TcpOpt *)data; 244 int len = opt->len(); 245 if (all < len) 246 return false; 247 248 vec.push_back(opt); 249 all -= len; 250 data += len; 251 } 252 253 return true; 254} 255 256bool 257TcpOpt::sack(vector<SackRange> &vec) const 258{ 259 vec.clear(); 260 261 const uint8_t *data = bytes() + sizeof(struct tcp_hdr); 262 int all = len() - offsetof(tcp_opt, opt_data.sack); 263 while (all > 0) { 264 const uint16_t *sack = (const uint16_t *)data; 265 int len = sizeof(uint16_t) * 2; 266 if (all < len) { 267 vec.clear(); 268 return false; 269 } 270 271 vec.push_back(RangeIn(ntohs(sack[0]), ntohs(sack[1]))); 272 all -= len; 273 data += len; 274 } 275 276 return false; 277} 278 279int 280hsplit(const EthPacketPtr &ptr) 281{ 282 int split_point = 0; 283 284 IpPtr ip(ptr); 285 if (ip) { 286 split_point = ip.pstart(); 287 288 TcpPtr tcp(ip); 289 if (tcp) 290 split_point = tcp.pstart(); 291 292 UdpPtr udp(ip); 293 if (udp) 294 split_point = udp.pstart(); 295 } 296 return split_point; 297} 298 299 300} // namespace Net
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