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417 lines
13 KiB
C++
417 lines
13 KiB
C++
#include <cstdlib>
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#include <string>
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#include <algorithm>
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#include <cctype>
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#include <functional>
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#include <fstream>
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#include <set>
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#include <boost/asio.hpp>
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#include <boost/lexical_cast.hpp>
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#include "Config.h"
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#include "util.h"
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#include "Log.h"
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#ifdef WIN32
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <iphlpapi.h>
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#include <shlobj.h>
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#ifdef _MSC_VER
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#pragma comment(lib, "IPHLPAPI.lib")
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#endif // _MSC_VER
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#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x))
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#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))
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int inet_pton(int af, const char *src, void *dst)
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{ /* This function was written by Petar Korponai?. See
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http://stackoverflow.com/questions/15660203/inet-pton-identifier-not-found */
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struct sockaddr_storage ss;
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int size = sizeof (ss);
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char src_copy[INET6_ADDRSTRLEN + 1];
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ZeroMemory (&ss, sizeof (ss));
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strncpy (src_copy, src, INET6_ADDRSTRLEN + 1);
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src_copy[INET6_ADDRSTRLEN] = 0;
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if (WSAStringToAddress (src_copy, af, NULL, (struct sockaddr *)&ss, &size) == 0)
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{
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switch (af)
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{
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case AF_INET:
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*(struct in_addr *)dst = ((struct sockaddr_in *)&ss)->sin_addr;
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return 1;
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case AF_INET6:
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*(struct in6_addr *)dst = ((struct sockaddr_in6 *)&ss)->sin6_addr;
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return 1;
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}
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}
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return 0;
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}
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#else /* !WIN32 => UNIX */
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#include <sys/types.h>
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#include <ifaddrs.h>
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#endif
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namespace i2p
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{
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namespace util
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{
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namespace http
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{
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std::string GetHttpContent (std::istream& response)
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{
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std::string version, statusMessage;
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response >> version; // HTTP version
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int status;
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response >> status; // status
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std::getline (response, statusMessage);
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if (status == 200) // OK
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{
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bool isChunked = false;
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std::string header;
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while (!response.eof () && header != "\r")
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{
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std::getline(response, header);
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auto colon = header.find (':');
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if (colon != std::string::npos)
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{
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std::string field = header.substr (0, colon);
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boost::to_lower (field);
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if (field == i2p::util::http::TRANSFER_ENCODING)
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isChunked = (header.find ("chunked", colon + 1) != std::string::npos);
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}
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}
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std::stringstream ss;
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if (isChunked)
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MergeChunkedResponse (response, ss);
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else
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ss << response.rdbuf();
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return ss.str();
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}
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else
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{
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LogPrint (eLogError, "HTTPClient: error, server responds ", status);
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return "";
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}
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}
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void MergeChunkedResponse (std::istream& response, std::ostream& merged)
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{
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while (!response.eof ())
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{
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std::string hexLen;
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int len;
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std::getline (response, hexLen);
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std::istringstream iss (hexLen);
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iss >> std::hex >> len;
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if (!len) break;
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char * buf = new char[len];
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response.read (buf, len);
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merged.write (buf, len);
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delete[] buf;
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std::getline (response, hexLen); // read \r\n after chunk
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}
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}
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url::url(const std::string& url_s)
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{
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portstr_ = "80";
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port_ = 80;
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user_ = "";
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pass_ = "";
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parse(url_s);
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}
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// code for parser tests
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//{
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// i2p::util::http::url u_0("http://127.0.0.1:7070/asdasd?qqqqqqqqqqqq");
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// i2p::util::http::url u_1("http://user:password@site.com:8080/asdasd?qqqqqqqqqqqqq");
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// i2p::util::http::url u_2("http://user:password@site.com/asdasd?qqqqqqqqqqqqqq");
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// i2p::util::http::url u_3("http://user:@site.com/asdasd?qqqqqqqqqqqqq");
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// i2p::util::http::url u_4("http://user@site.com/asdasd?qqqqqqqqqqqq");
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// i2p::util::http::url u_5("http://@site.com:800/asdasd?qqqqqqqqqqqq");
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// i2p::util::http::url u_6("http://@site.com:err_port/asdasd?qqqqqqqqqqqq");
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// i2p::util::http::url u_7("http://user:password@site.com:err_port/asdasd?qqqqqqqqqqqq");
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//}
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void url::parse(const std::string& url_s)
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{
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const std::string prot_end("://");
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std::string::const_iterator prot_i = search(url_s.begin(), url_s.end(),
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prot_end.begin(), prot_end.end());
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protocol_.reserve(distance(url_s.begin(), prot_i));
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transform(url_s.begin(), prot_i,
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back_inserter(protocol_),
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std::ptr_fun<int,int>(tolower)); // protocol is icase
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if( prot_i == url_s.end() )
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return;
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advance(prot_i, prot_end.length());
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std::string::const_iterator path_i = find(prot_i, url_s.end(), '/');
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host_.reserve(distance(prot_i, path_i));
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transform(prot_i, path_i,
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back_inserter(host_),
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std::ptr_fun<int,int>(tolower)); // host is icase
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// parse user/password
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auto user_pass_i = find(host_.begin(), host_.end(), '@');
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if (user_pass_i != host_.end())
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{
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std::string user_pass = std::string(host_.begin(), user_pass_i);
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auto pass_i = find(user_pass.begin(), user_pass.end(), ':');
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if (pass_i != user_pass.end())
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{
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user_ = std::string(user_pass.begin(), pass_i);
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pass_ = std::string(pass_i + 1, user_pass.end());
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}
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else
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user_ = user_pass;
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host_.assign(user_pass_i + 1, host_.end());
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}
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// parse port
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auto port_i = find(host_.begin(), host_.end(), ':');
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if (port_i != host_.end())
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{
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portstr_ = std::string(port_i + 1, host_.end());
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host_.assign(host_.begin(), port_i);
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try{
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port_ = boost::lexical_cast<decltype(port_)>(portstr_);
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}
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catch (std::exception e) {
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port_ = 80;
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}
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}
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std::string::const_iterator query_i = find(path_i, url_s.end(), '?');
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path_.assign(path_i, query_i);
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if( query_i != url_s.end() )
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++query_i;
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query_.assign(query_i, url_s.end());
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}
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std::string urlDecode(const std::string& data)
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{
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std::string res(data);
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for (size_t pos = res.find('%'); pos != std::string::npos; pos = res.find('%',pos+1))
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{
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char c = strtol(res.substr(pos+1,2).c_str(), NULL, 16);
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res.replace(pos,3,1,c);
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}
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return res;
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}
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}
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namespace net
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{
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#ifdef WIN32
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int GetMTUWindowsIpv4(sockaddr_in inputAddress, int fallback)
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{
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ULONG outBufLen = 0;
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PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
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PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
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PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
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if(GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
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== ERROR_BUFFER_OVERFLOW) {
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FREE(pAddresses);
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pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
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}
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
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);
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if(dwRetVal != NO_ERROR) {
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LogPrint(eLogError, "NetIface: GetMTU(): enclosed GetAdaptersAddresses() call has failed");
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FREE(pAddresses);
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return fallback;
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}
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pCurrAddresses = pAddresses;
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while(pCurrAddresses) {
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PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
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pUnicast = pCurrAddresses->FirstUnicastAddress;
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if(pUnicast == nullptr) {
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LogPrint(eLogError, "NetIface: GetMTU(): not a unicast ipv4 address, this is not supported");
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}
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for(int i = 0; pUnicast != nullptr; ++i) {
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LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
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sockaddr_in* localInterfaceAddress = (sockaddr_in*) lpAddr;
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if(localInterfaceAddress->sin_addr.S_un.S_addr == inputAddress.sin_addr.S_un.S_addr) {
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auto result = pAddresses->Mtu;
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FREE(pAddresses);
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return result;
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}
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pUnicast = pUnicast->Next;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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LogPrint(eLogError, "NetIface: GetMTU(): no usable unicast ipv4 addresses found");
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FREE(pAddresses);
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return fallback;
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}
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int GetMTUWindowsIpv6(sockaddr_in6 inputAddress, int fallback)
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{
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ULONG outBufLen = 0;
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PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
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PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
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PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
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if(GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
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== ERROR_BUFFER_OVERFLOW) {
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FREE(pAddresses);
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pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
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}
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DWORD dwRetVal = GetAdaptersAddresses(
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AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
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);
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if(dwRetVal != NO_ERROR) {
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LogPrint(eLogError, "NetIface: GetMTU(): enclosed GetAdaptersAddresses() call has failed");
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FREE(pAddresses);
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return fallback;
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}
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bool found_address = false;
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pCurrAddresses = pAddresses;
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while(pCurrAddresses) {
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PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
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pUnicast = pCurrAddresses->FirstUnicastAddress;
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if(pUnicast == nullptr) {
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LogPrint(eLogError, "NetIface: GetMTU(): not a unicast ipv6 address, this is not supported");
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}
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for(int i = 0; pUnicast != nullptr; ++i) {
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LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
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sockaddr_in6 *localInterfaceAddress = (sockaddr_in6*) lpAddr;
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for (int j = 0; j != 8; ++j) {
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if (localInterfaceAddress->sin6_addr.u.Word[j] != inputAddress.sin6_addr.u.Word[j]) {
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break;
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} else {
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found_address = true;
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}
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} if (found_address) {
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auto result = pAddresses->Mtu;
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FREE(pAddresses);
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pAddresses = nullptr;
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return result;
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}
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pUnicast = pUnicast->Next;
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}
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pCurrAddresses = pCurrAddresses->Next;
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}
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LogPrint(eLogError, "NetIface: GetMTU(): no usable unicast ipv6 addresses found");
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FREE(pAddresses);
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return fallback;
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}
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int GetMTUWindows(const boost::asio::ip::address& localAddress, int fallback)
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{
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#ifdef UNICODE
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string localAddress_temporary = localAddress.to_string();
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wstring localAddressUniversal(localAddress_temporary.begin(), localAddress_temporary.end());
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#else
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std::string localAddressUniversal = localAddress.to_string();
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#endif
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if(localAddress.is_v4()) {
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sockaddr_in inputAddress;
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inet_pton(AF_INET, localAddressUniversal.c_str(), &(inputAddress.sin_addr));
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return GetMTUWindowsIpv4(inputAddress, fallback);
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} else if(localAddress.is_v6()) {
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sockaddr_in6 inputAddress;
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inet_pton(AF_INET6, localAddressUniversal.c_str(), &(inputAddress.sin6_addr));
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return GetMTUWindowsIpv6(inputAddress, fallback);
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} else {
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LogPrint(eLogError, "NetIface: GetMTU(): address family is not supported");
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return fallback;
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}
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}
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#else // assume unix
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int GetMTUUnix(const boost::asio::ip::address& localAddress, int fallback)
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{
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ifaddrs* ifaddr, *ifa = nullptr;
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if(getifaddrs(&ifaddr) == -1)
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{
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LogPrint(eLogError, "NetIface: Can't call getifaddrs(): ", strerror(errno));
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return fallback;
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}
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int family = 0;
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// look for interface matching local address
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for(ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next)
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{
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if(!ifa->ifa_addr)
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continue;
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family = ifa->ifa_addr->sa_family;
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if(family == AF_INET && localAddress.is_v4())
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{
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sockaddr_in* sa = (sockaddr_in*) ifa->ifa_addr;
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if(!memcmp(&sa->sin_addr, localAddress.to_v4().to_bytes().data(), 4))
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break; // address matches
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}
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else if(family == AF_INET6 && localAddress.is_v6())
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{
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sockaddr_in6* sa = (sockaddr_in6*) ifa->ifa_addr;
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if(!memcmp(&sa->sin6_addr, localAddress.to_v6().to_bytes().data(), 16))
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break; // address matches
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}
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}
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int mtu = fallback;
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if(ifa && family)
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{ // interface found?
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int fd = socket(family, SOCK_DGRAM, 0);
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if(fd > 0)
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{
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ifreq ifr;
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strncpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ); // set interface for query
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if(ioctl(fd, SIOCGIFMTU, &ifr) >= 0)
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mtu = ifr.ifr_mtu; // MTU
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else
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LogPrint (eLogError, "NetIface: Failed to run ioctl: ", strerror(errno));
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close(fd);
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}
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else
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LogPrint(eLogError, "NetIface: Failed to create datagram socket");
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}
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else
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LogPrint(eLogWarning, "NetIface: interface for local address", localAddress.to_string(), " not found");
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freeifaddrs(ifaddr);
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return mtu;
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}
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#endif // WIN32
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int GetMTU(const boost::asio::ip::address& localAddress)
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{
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const int fallback = 576; // fallback MTU
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#ifdef WIN32
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return GetMTUWindows(localAddress, fallback);
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#else
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return GetMTUUnix(localAddress, fallback);
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#endif
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return fallback;
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}
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}
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} // util
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} // i2p
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