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Cleanup util, add documentation.

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This commit is contained in:
EinMByte 2015-07-19 17:52:28 +02:00
parent 66754aac5a
commit 79e3f669f0
2 changed files with 374 additions and 329 deletions
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610
util.cpp
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@ -60,50 +60,43 @@ http://stackoverflow.com/questions/15660203/inet-pton-identifier-not-found */
}
#endif
namespace i2p
{
namespace util
{
namespace i2p {
namespace util {
namespace config
{
std::map<std::string, std::string> mapArgs;
std::map<std::string, std::vector<std::string> > mapMultiArgs;
namespace config {
std::map<std::string, std::string> mapArgs;
std::map<std::string, std::vector<std::string> > mapMultiArgs;
void OptionParser(int argc, const char* const argv[])
void OptionParser(int argc, const char* const argv[])
{
mapArgs.clear();
mapMultiArgs.clear();
for (int i = 1; i < argc; i++)
{
for(int i = 1; i < argc; ++i) {
std::string strKey (argv[i]);
std::string strValue;
size_t has_data = strKey.find('=');
if (has_data != std::string::npos)
{
if(has_data != std::string::npos) {
strValue = strKey.substr(has_data+1);
strKey = strKey.substr(0, has_data);
}
#ifdef WIN32
boost::to_lower(strKey);
if (boost::algorithm::starts_with(strKey, "/"))
if(boost::algorithm::starts_with(strKey, "/"))
strKey = "-" + strKey.substr(1);
#endif
if (strKey[0] != '-')
if(strKey[0] != '-')
break;
mapArgs[strKey] = strValue;
mapMultiArgs[strKey].push_back(strValue);
}
BOOST_FOREACH(PAIRTYPE(const std::string,std::string)& entry, mapArgs)
{
for(auto& entry : mapArgs) {
std::string name = entry.first;
// interpret --foo as -foo (as long as both are not set)
if (name.find("--") == 0)
{
if (name.find("--") == 0) {
std::string singleDash(name.begin()+1, name.end());
if (mapArgs.count(singleDash) == 0)
mapArgs[singleDash] = entry.second;
@ -114,41 +107,42 @@ namespace i2p
const char* GetCharArg(const std::string& strArg, const std::string& nDefault)
{
if (mapArgs.count(strArg))
if(mapArgs.count(strArg))
return mapArgs[strArg].c_str();
return nDefault.c_str();
}
std::string GetArg(const std::string& strArg, const std::string& strDefault)
{
if (mapArgs.count(strArg))
if(mapArgs.count(strArg))
return mapArgs[strArg];
return strDefault;
}
int GetArg(const std::string& strArg, int nDefault)
{
if (mapArgs.count(strArg))
return atoi(mapArgs[strArg].c_str());
if(mapArgs.count(strArg))
return stoi(mapArgs[strArg]);
return nDefault;
}
}
namespace filesystem
{
std::string appName ("i2pd");
std::string appName("i2pd");
void SetAppName (const std::string& name)
void SetAppName(const std::string& name)
{
appName = name;
}
std::string GetAppName ()
std::string GetAppName()
{
return appName;
}
const boost::filesystem::path &GetDataDir()
const boost::filesystem::path& GetDataDir()
{
static boost::filesystem::path path;
@ -157,81 +151,59 @@ namespace filesystem
/*if (i2p::util::config::mapArgs.count("-datadir"))
path = boost::filesystem::system_complete(i2p::util::config::mapArgs["-datadir"]);
else */
path = GetDefaultDataDir();
path = GetDefaultDataDir();
if (!boost::filesystem::exists( path ))
{
if(!boost::filesystem::exists(path)) {
// Create data directory
if (!boost::filesystem::create_directory( path ))
{
if(!boost::filesystem::create_directory(path)) {
LogPrint("Failed to create data directory!");
path = "";
return path;
}
}
if (!boost::filesystem::is_directory(path))
if(!boost::filesystem::is_directory(path))
path = GetDefaultDataDir();
return path;
}
std::string GetFullPath (const std::string& filename)
std::string GetFullPath(const std::string& filename)
{
std::string fullPath = GetDataDir ().string ();
std::string fullPath = GetDataDir().string();
#ifndef _WIN32
fullPath.append ("/");
fullPath.append("/");
#else
fullPath.append ("\\");
fullPath.append("\\");
#endif
fullPath.append (filename);
fullPath.append(filename);
return fullPath;
}
boost::filesystem::path GetConfigFile()
{
boost::filesystem::path pathConfigFile(i2p::util::config::GetArg("-conf", "i2p.conf"));
if (!pathConfigFile.is_complete()) pathConfigFile = GetDataDir() / pathConfigFile;
if(!pathConfigFile.is_complete())
pathConfigFile = GetDataDir() / pathConfigFile;
return pathConfigFile;
}
void ReadConfigFile(std::map<std::string, std::string>& mapSettingsRet,
std::map<std::string, std::vector<std::string> >& mapMultiSettingsRet)
{
boost::filesystem::ifstream streamConfig(GetConfigFile());
if (!streamConfig.good())
return; // No i2pd.conf file is OK
std::set<std::string> setOptions;
setOptions.insert("*");
for (boost::program_options::detail::config_file_iterator it(streamConfig, setOptions), end; it != end; ++it)
{
// Don't overwrite existing settings so command line settings override i2pd.conf
std::string strKey = std::string("-") + it->string_key;
if (mapSettingsRet.count(strKey) == 0)
{
mapSettingsRet[strKey] = it->value[0];
}
mapMultiSettingsRet[strKey].push_back(it->value[0]);
}
}
boost::filesystem::path GetDefaultDataDir()
{
// Windows < Vista: C:\Documents and Settings\Username\Application Data\i2pd
// Windows >= Vista: C:\Users\Username\AppData\Roaming\i2pd
// Mac: ~/Library/Application Support/i2pd
// Unix: ~/.i2pd or /var/lib/i2pd is system=1
#ifdef WIN32
// Windows
char localAppData[MAX_PATH];
SHGetFolderPath(NULL, CSIDL_APPDATA, 0, NULL, localAppData);
return boost::filesystem::path(std::string(localAppData) + "\\" + appName);
#else
if (i2p::util::config::GetArg("-service", 0)) // use system folder
if(i2p::util::config::GetArg("-service", 0)) // use system folder
return boost::filesystem::path(std::string ("/var/lib/") + appName);
boost::filesystem::path pathRet;
char* pszHome = getenv("HOME");
if (pszHome == NULL || strlen(pszHome) == 0)
if(pszHome == NULL || strlen(pszHome) == 0)
pathRet = boost::filesystem::path("/");
else
pathRet = boost::filesystem::path(pszHome);
@ -247,47 +219,62 @@ namespace filesystem
#endif
}
void ReadConfigFile(std::map<std::string, std::string>& mapSettingsRet,
std::map<std::string, std::vector<std::string> >& mapMultiSettingsRet)
{
boost::filesystem::ifstream streamConfig(GetConfigFile());
if(!streamConfig.good())
return; // No i2pd.conf file is OK
std::set<std::string> setOptions;
setOptions.insert("*");
for(boost::program_options::detail::config_file_iterator it(streamConfig, setOptions), end;
it != end; ++it) {
// Don't overwrite existing settings so command line settings override i2pd.conf
std::string strKey = std::string("-") + it->string_key;
if(mapSettingsRet.count(strKey) == 0) {
mapSettingsRet[strKey] = it->value[0];
}
mapMultiSettingsRet[strKey].push_back(it->value[0]);
}
}
boost::filesystem::path GetCertificatesDir()
{
return GetDataDir () / "certificates";
}
}
}
namespace http
{
std::string httpRequest(const std::string& address)
{
try
{
try {
i2p::util::http::url u(address);
boost::asio::ip::tcp::iostream site;
// please don't uncomment following line because it's not compatible with boost 1.46
// 1.46 is default boost for Ubuntu 12.04 LTS
//site.expires_from_now (boost::posix_time::seconds(30));
if (u.port_ == 80)
if(u.port_ == 80)
site.connect(u.host_, "http");
else
{
else {
std::stringstream ss; ss << u.port_;
site.connect(u.host_, ss.str());
}
if (site)
{
if(site) {
// User-Agent is needed to get the server list routerInfo files.
site << "GET " << u.path_ << " HTTP/1.1\r\nHost: " << u.host_
<< "\r\nAccept: */*\r\n" << "User-Agent: Wget/1.11.4\r\n" << "Connection: close\r\n\r\n";
<< "\r\nAccept: */*\r\n" << "User-Agent: Wget/1.11.4\r\n"
<< "Connection: close\r\n\r\n";
// read response and extract content
return GetHttpContent (site);
}
else
{
LogPrint ("Can't connect to ", address);
return GetHttpContent(site);
} else {
LogPrint("Can't connect to ", address);
return "";
}
}
catch (std::exception& ex)
{
LogPrint ("Failed to download ", address, " : ", ex.what ());
} catch(const std::exception& ex) {
LogPrint("Failed to download ", address, " : ", ex.what());
return "";
}
}
@ -299,59 +286,54 @@ namespace http
int status;
response >> status; // status
std::getline (response, statusMessage);
if (status == 200) // OK
{
if(status == 200) { // OK
bool isChunked = false;
std::string header;
while (!response.eof () && header != "\r")
{
while(!response.eof() && header != "\r") {
std::getline(response, header);
auto colon = header.find (':');
if (colon != std::string::npos)
{
if(colon != std::string::npos) {
std::string field = header.substr (0, colon);
if (field == i2p::util::http::TRANSFER_ENCODING)
isChunked = (header.find ("chunked", colon + 1) != std::string::npos);
}
if(field == i2p::util::http::TRANSFER_ENCODING)
isChunked = (header.find("chunked", colon + 1) != std::string::npos);
}
}
std::stringstream ss;
if (isChunked)
MergeChunkedResponse (response, ss);
if(isChunked)
MergeChunkedResponse(response, ss);
else
ss << response.rdbuf();
return ss.str();
}
else
{
LogPrint ("HTTP response ", status);
} else {
LogPrint("HTTP response ", status);
return "";
}
}
void MergeChunkedResponse (std::istream& response, std::ostream& merged)
void MergeChunkedResponse(std::istream& response, std::ostream& merged)
{
while (!response.eof ())
{
while(!response.eof()) {
std::string hexLen;
int len;
std::getline (response, hexLen);
std::istringstream iss (hexLen);
std::getline(response, hexLen);
std::istringstream iss(hexLen);
iss >> std::hex >> len;
if (!len) break;
char * buf = new char[len];
response.read (buf, len);
merged.write (buf, len);
if(!len)
break;
char* buf = new char[len];
response.read(buf, len);
merged.write(buf, len);
delete[] buf;
std::getline (response, hexLen); // read \r\n after chunk
std::getline(response, hexLen); // read \r\n after chunk
}
}
int httpRequestViaI2pProxy(const std::string& address, std::string &content)
{
content = "";
try
{
try {
boost::asio::ip::tcp::iostream site;
// please don't uncomment following line because it's not compatible with boost 1.46
// 1.46 is default boost for Ubuntu 12.04 LTS
@ -360,8 +342,7 @@ namespace http
std::stringstream ss; ss << i2p::util::config::GetArg("-httpproxyport", 4446);
site.connect("127.0.0.1", ss.str());
}
if (site)
{
if(site) {
i2p::util::http::url u(address);
std::stringstream ss;
ss << "GET " << address << " HTTP/1.0" << std::endl;
@ -378,29 +359,22 @@ namespace http
int status;
site >> status; // status
std::getline(site, statusMessage);
if (status == 200) // OK
{
if(status == 200) { // OK
std::string header;
while (std::getline(site, header) && header != "\r"){}
while(std::getline(site, header) && header != "\r"){}
std::stringstream ss;
ss << site.rdbuf();
content = ss.str();
return status;
}
else
{
} else {
LogPrint("HTTP response ", status);
return status;
}
}
else
{
} else {
LogPrint("Can't connect to proxy");
return 408;
}
}
catch (std::exception& ex)
{
} catch (std::exception& ex) {
LogPrint("Failed to download ", address, " : ", ex.what());
return 408;
}
@ -417,47 +391,34 @@ namespace http
}
// code for parser tests
//{
// i2p::util::http::url u_0("http://127.0.0.1:7070/asdasd?qqqqqqqqqqqq");
// i2p::util::http::url u_1("http://user:password@site.com:8080/asdasd?qqqqqqqqqqqqq");
// i2p::util::http::url u_2("http://user:password@site.com/asdasd?qqqqqqqqqqqqqq");
// i2p::util::http::url u_3("http://user:@site.com/asdasd?qqqqqqqqqqqqq");
// i2p::util::http::url u_4("http://user@site.com/asdasd?qqqqqqqqqqqq");
// i2p::util::http::url u_5("http://@site.com:800/asdasd?qqqqqqqqqqqq");
// i2p::util::http::url u_6("http://@site.com:err_port/asdasd?qqqqqqqqqqqq");
// i2p::util::http::url u_7("http://user:password@site.com:err_port/asdasd?qqqqqqqqqqqq");
//}
void url::parse(const std::string& url_s)
{
const std::string prot_end("://");
std::string::const_iterator prot_i = search(url_s.begin(), url_s.end(),
prot_end.begin(), prot_end.end());
std::string::const_iterator prot_i = search(
url_s.begin(), url_s.end(), prot_end.begin(), prot_end.end()
);
protocol_.reserve(distance(url_s.begin(), prot_i));
transform(url_s.begin(), prot_i,
back_inserter(protocol_),
std::ptr_fun<int,int>(tolower)); // protocol is icase
if( prot_i == url_s.end() )
// Make portocol lowercase
transform(
url_s.begin(), prot_i, back_inserter(protocol_), std::ptr_fun<int, int>(std::tolower)
);
if(prot_i == url_s.end())
return;
advance(prot_i, prot_end.length());
std::string::const_iterator path_i = find(prot_i, url_s.end(), '/');
host_.reserve(distance(prot_i, path_i));
transform(prot_i, path_i,
back_inserter(host_),
std::ptr_fun<int,int>(tolower)); // host is icase
// Make host lowerase
transform(prot_i, path_i, back_inserter(host_), std::ptr_fun<int, int>(std::tolower));
// parse user/password
auto user_pass_i = find(host_.begin(), host_.end(), '@');
if (user_pass_i != host_.end())
{
if(user_pass_i != host_.end()) {
std::string user_pass = std::string(host_.begin(), user_pass_i);
auto pass_i = find(user_pass.begin(), user_pass.end(), ':');
if (pass_i != user_pass.end())
{
if (pass_i != user_pass.end()) {
user_ = std::string(user_pass.begin(), pass_i);
pass_ = std::string(pass_i + 1, user_pass.end());
}
else
} else
user_ = user_pass;
host_.assign(user_pass_i + 1, host_.end());
@ -465,14 +426,12 @@ namespace http
// parse port
auto port_i = find(host_.begin(), host_.end(), ':');
if (port_i != host_.end())
{
if(port_i != host_.end()) {
portstr_ = std::string(port_i + 1, host_.end());
host_.assign(host_.begin(), port_i);
try{
try {
port_ = boost::lexical_cast<decltype(port_)>(portstr_);
}
catch (const std::exception& e) {
} catch(const std::exception& e) {
port_ = 80;
}
}
@ -487,209 +446,220 @@ namespace http
std::string urlDecode(const std::string& data)
{
std::string res(data);
for (size_t pos = res.find('%'); pos != std::string::npos; pos = res.find('%',pos+1))
{
char c = strtol(res.substr(pos+1,2).c_str(), NULL, 16);
res.replace(pos,3,1,c);
for(size_t pos = res.find('%'); pos != std::string::npos; pos = res.find('%', pos + 1)) {
const char c = strtol(res.substr(pos + 1, 2).c_str(), NULL, 16);
res.replace(pos, 3, 1, c);
}
return res;
}
}
namespace net
{
int GetMTU (const boost::asio::ip::address& localAddress)
{
namespace net {
#if defined(__linux__) || defined(__FreeBSD_kernel__)
ifaddrs * ifaddr, * ifa = nullptr;
if (getifaddrs(&ifaddr) == -1)
{
LogPrint (eLogError, "Can't excute getifaddrs");
return 0;
int GetMTUUnix(const boost::asio::ip::address& localAddress, int fallback)
{
ifaddrs* ifaddr, *ifa = nullptr;
if(getifaddrs(&ifaddr) == -1) {
LogPrint(eLogError, "Can't excute getifaddrs");
return fallback;
}
int family = 0;
// loook for interface matching local address
for (ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next)
{
if (!ifa->ifa_addr) continue;
// look for interface matching local address
for(ifa = ifaddr; ifa != nullptr; ifa = ifa->ifa_next) {
if(!ifa->ifa_addr)
continue;
family = ifa->ifa_addr->sa_family;
if (family == AF_INET && localAddress.is_v4 ())
{
sockaddr_in * sa = (sockaddr_in *)ifa->ifa_addr;
if (!memcmp (&sa->sin_addr, localAddress.to_v4 ().to_bytes ().data (), 4))
if(family == AF_INET && localAddress.is_v4()) {
sockaddr_in* sa = (sockaddr_in*) ifa->ifa_addr;
if(!memcmp(&sa->sin_addr, localAddress.to_v4().to_bytes().data(), 4))
break; // address matches
}
else if (family == AF_INET6 && localAddress.is_v6 ())
{
sockaddr_in6 * sa = (sockaddr_in6 *)ifa->ifa_addr;
if (!memcmp (&sa->sin6_addr, localAddress.to_v6 ().to_bytes ().data (), 16))
} else if(family == AF_INET6 && localAddress.is_v6()) {
sockaddr_in6* sa = (sockaddr_in6*) ifa->ifa_addr;
if(!memcmp(&sa->sin6_addr, localAddress.to_v6().to_bytes().data(), 16))
break; // address matches
}
}
int mtu = 0;
if (ifa && family) // interface found?
{
int fd = socket (family, SOCK_DGRAM, 0);
if (fd > 0)
{
int mtu = fallback;
if(ifa && family) { // interface found?
int fd = socket(family, SOCK_DGRAM, 0);
if(fd > 0) {
ifreq ifr;
strncpy (ifr.ifr_name, ifa->ifa_name, IFNAMSIZ); // set interface for query
if (ioctl (fd, SIOCGIFMTU, &ifr) >= 0)
strncpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ); // set interface for query
if(ioctl(fd, SIOCGIFMTU, &ifr) >= 0)
mtu = ifr.ifr_mtu; // MTU
else
LogPrint (eLogError, "Failed to run ioctl");
close (fd);
}
else
LogPrint (eLogError, "Failed to create datagram socket");
}
else
LogPrint (eLogWarning, "Interface for local address", localAddress.to_string (), " not found");
close(fd);
} else
LogPrint(eLogError, "Failed to create datagram socket");
} else {
LogPrint(
eLogWarning, "Interface for local address",
localAddress.to_string(), " not found"
);
}
freeifaddrs(ifaddr);
freeifaddrs (ifaddr);
return mtu;
}
#elif defined(WIN32)
int result = 576; // fallback MTU
DWORD dwRetVal = 0;
int GetMTUWindowsIpv4(sockaddr_in inputAddress, int fallback)
{
ULONG outBufLen = 0;
PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
if(GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
== ERROR_BUFFER_OVERFLOW) {
FREE(pAddresses);
pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
}
DWORD dwRetVal = GetAdaptersAddresses(
AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
);
if(dwRetVal != NO_ERROR) {
LogPrint(
eLogError, "GetMTU() has failed: enclosed GetAdaptersAddresses() call has failed"
);
FREE(pAddresses);
return fallback;
}
pCurrAddresses = pAddresses;
while(pCurrAddresses) {
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
pUnicast = pCurrAddresses->FirstUnicastAddress;
if(pUnicast == nullptr) {
LogPrint(
eLogError, "GetMTU() has failed: not a unicast ipv4 address, this is not supported"
);
}
for(int i = 0; pUnicast != nullptr; ++i) {
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
sockaddr_in* localInterfaceAddress = (sockaddr_in*) lpAddr;
if(localInterfaceAddress->sin_addr.S_un.S_addr == inputAddress.sin_addr.S_un.S_addr) {
result = pAddresses->Mtu;
FREE(pAddresses);
return result;
}
pUnicast = pUnicast->Next;
}
pCurrAddresses = pCurrAddresses->Next;
}
LogPrint(eLogError, "GetMTU() error: no usable unicast ipv4 addresses found");
FREE(pAddresses);
return fallback;
}
int GetMTUWindowsIpv6(sockaddr_in inputAddress, int fallback)
{
ULONG outBufLen = 0;
PIP_ADAPTER_ADDRESSES pAddresses = nullptr;
PIP_ADAPTER_ADDRESSES pCurrAddresses = nullptr;
PIP_ADAPTER_UNICAST_ADDRESS pUnicast = nullptr;
if(GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
== ERROR_BUFFER_OVERFLOW) {
FREE(pAddresses);
pAddresses = (IP_ADAPTER_ADDRESSES*) MALLOC(outBufLen);
}
DWORD dwRetVal = GetAdaptersAddresses(
AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen
);
if(dwRetVal != NO_ERROR) {
LogPrint(
eLogError,
"GetMTU() has failed: enclosed GetAdaptersAddresses() call has failed"
);
FREE(pAddresses);
return fallback;
}
bool found_address = false;
pCurrAddresses = pAddresses;
while(pCurrAddresses) {
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
pUnicast = pCurrAddresses->FirstUnicastAddress;
if(pUnicast == nullptr) {
LogPrint(
eLogError,
"GetMTU() has failed: not a unicast ipv6 address, this is not supported"
);
}
for(int i = 0; pUnicast != nullptr; ++i) {
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
sockaddr_in6 *localInterfaceAddress = (sockaddr_in6*) lpAddr;
for (int j = 0; j != 8; ++j) {
if (localInterfaceAddress->sin6_addr.u.Word[j] != inputAddress.sin6_addr.u.Word[j]) {
break;
} else {
found_address = true;
}
} if (found_address) {
result = pAddresses->Mtu;
FREE(pAddresses);
pAddresses = nullptr;
return result;
}
pUnicast = pUnicast->Next;
}
pCurrAddresses = pCurrAddresses->Next;
}
LogPrint(eLogError, "GetMTU() error: no usable unicast ipv6 addresses found");
FREE(pAddresses);
return fallback;
}
int GetMTUWindows(const boost::asio::ip::address& localAddress, int fallback)
{
#ifdef UNICODE
string localAddress_temporary = localAddress.to_string();
wstring localAddressUniversal (localAddress_temporary.begin(), localAddress_temporary.end());
wstring localAddressUniversal(localAddress_temporary.begin(), localAddress_temporary.end());
#else
std::string localAddressUniversal = localAddress.to_string();
#endif
if (localAddress.is_v4())
{
struct sockaddr_in inputAddress;
if(localAddress.is_v4()) {
sockaddr_in inputAddress;
inet_pton(AF_INET, localAddressUniversal.c_str(), &(inputAddress.sin_addr));
if (GetAdaptersAddresses (AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
== ERROR_BUFFER_OVERFLOW)
{
FREE (pAddresses);
pAddresses = (IP_ADAPTER_ADDRESSES *)MALLOC (outBufLen);
}
dwRetVal = GetAdaptersAddresses (AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen);
if (dwRetVal == NO_ERROR)
{
pCurrAddresses = pAddresses;
while (pCurrAddresses)
{
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
pUnicast = pCurrAddresses->FirstUnicastAddress;
if (pUnicast != nullptr)
{
for (int i = 0; pUnicast != nullptr; ++i)
{
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
struct sockaddr_in *localInterfaceAddress = (struct sockaddr_in*) lpAddr;
if (localInterfaceAddress->sin_addr.S_un.S_addr == inputAddress.sin_addr.S_un.S_addr)
{
result = pAddresses->Mtu;
FREE (pAddresses);
pAddresses = nullptr;
return result;
}
pUnicast = pUnicast->Next;
}
}
else
{
LogPrint (eLogError, "GetMTU() has failed: not a unicast ipv4 address, this is not supported");
}
pCurrAddresses = pCurrAddresses->Next;
}
}
else
{
LogPrint (eLogError, "GetMTU() has failed: enclosed GetAdaptersAddresses() call has failed");
return GetMTUWindowsIpv4(inputAddress, fallback);
} else if(localAddress.is_v6()) {
sockaddr_in6 inputAddress;
inet_pton(AF_INET6, localAddressUniversal.c_str(), &(inputAddress.sin6_addr));
return GetMTUWindowsIpv6(inputAddress, fallback);
} else {
LogPrint(eLogError, "GetMTU() has failed: address family is not supported");
return result;
}
}
else if (localAddress.is_v6())
{
struct sockaddr_in6 inputAddress;
inet_pton(AF_INET6, localAddressUniversal.c_str(), &(inputAddress.sin6_addr));
}
#endif // WIN32
if (GetAdaptersAddresses(AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen)
== ERROR_BUFFER_OVERFLOW)
{
FREE (pAddresses);
pAddresses = (IP_ADAPTER_ADDRESSES *)MALLOC (outBufLen);
}
int GetMTU(const boost::asio::ip::address& localAddress)
{
const int fallback = 576; // fallback MTU
dwRetVal = GetAdaptersAddresses (AF_INET6, GAA_FLAG_INCLUDE_PREFIX, nullptr, pAddresses, &outBufLen);
if (dwRetVal == NO_ERROR)
{
bool found_address = false;
pCurrAddresses = pAddresses;
while (pCurrAddresses)
{
PIP_ADAPTER_UNICAST_ADDRESS firstUnicastAddress = pCurrAddresses->FirstUnicastAddress;
pUnicast = pCurrAddresses->FirstUnicastAddress;
if (pUnicast != nullptr)
{
for (int i = 0; pUnicast != nullptr; ++i)
{
LPSOCKADDR lpAddr = pUnicast->Address.lpSockaddr;
struct sockaddr_in6 *localInterfaceAddress = (struct sockaddr_in6*) lpAddr;
for (int j = 0; j != 8; ++j)
{
if (localInterfaceAddress->sin6_addr.u.Word[j] != inputAddress.sin6_addr.u.Word[j])
{
break;
}
else
{
found_address = true;
}
}
if (found_address)
{
result = pAddresses->Mtu;
FREE (pAddresses);
pAddresses = nullptr;
return result;
}
pUnicast = pUnicast->Next;
}
}
else
{
LogPrint (eLogError, "GetMTU() has failed: not a unicast ipv6 address, this is not supported");
}
pCurrAddresses = pCurrAddresses->Next;
}
}
else
{
LogPrint (eLogError, "GetMTU() has failed: enclosed GetAdaptersAddresses() call has failed");
}
}
else
{
LogPrint (eLogError, "GetMTU() has failed: address family is not supported");
}
FREE (pAddresses);
pAddresses = nullptr;
LogPrint(eLogError, "GetMTU() error: control flow should never reach this line");
return result;
#if defined(__linux__) || defined(__FreeBSD_kernel__)
return GetMTUUnix(localAddress, fallback);
#elif defined(WIN32)
return GetMTUWindows(localAddress, fallback);
#endif
}
}

93
util.h
View file

@ -18,23 +18,73 @@ namespace util
{
extern std::map<std::string, std::string> mapArgs;
extern std::map<std::string, std::vector<std::string> > mapMultiArgs;
/**
* Parses command line arguments, i.e. stores them in config::mapArgs.
*/
void OptionParser(int argc, const char* const argv[]);
/**
* @return a command line argument from config::mapArgs as an int
* @param nDefault the default value to be returned
*/
int GetArg(const std::string& strArg, int nDefault);
/**
* @return a command line argument from config::mapArgs as a std::string
* @param strDefault the default value to be returned
*/
std::string GetArg(const std::string& strArg, const std::string& strDefault);
/**
* @return a command line argument from config::mapArgs as a C-style string
* @param nDefault the default value to be returned
*/
const char* GetCharArg(const std::string& strArg, const std::string& nDefault);
}
namespace filesystem
{
void SetAppName (const std::string& name);
std::string GetAppName ();
/**
* Change the application name.
*/
void SetAppName(const std::string& name);
const boost::filesystem::path &GetDataDir();
std::string GetFullPath (const std::string& filename);
boost::filesystem::path GetDefaultDataDir();
/**
* @return the application name.
*/
std::string GetAppName();
/**
* @return the path of the i2pd directory
*/
const boost::filesystem::path& GetDataDir();
/**
* @return the full path of a file within the i2pd directory
*/
std::string GetFullPath(const std::string& filename);
/**
* @return the path of the configuration file
*/
boost::filesystem::path GetConfigFile();
/**
* @return the default directory for i2pd data
*/
boost::filesystem::path GetDefaultDataDir();
/**
* Read a configuration file and store its contents in the given maps.
*/
void ReadConfigFile(std::map<std::string, std::string>& mapSettingsRet,
std::map<std::string, std::vector<std::string> >& mapMultiSettingsRet);
/**
* @return the path of the certificates directory
*/
boost::filesystem::path GetCertificatesDir();
}
@ -46,10 +96,32 @@ namespace util
const char LAST_MODIFIED[] = "Last-Modified";
const char TRANSFER_ENCODING[] = "Transfer-Encoding";
/**
* Perform an HTTP request.
* @return the result of the request, or an empty string if it fails
*/
std::string httpRequest(const std::string& address);
std::string GetHttpContent (std::istream& response);
void MergeChunkedResponse (std::istream& response, std::ostream& merged);
int httpRequestViaI2pProxy(const std::string& address, std::string &content); // return http code
/**
* @return the content of the given HTTP stream without headers
*/
std::string GetHttpContent(std::istream& response);
/**
* Merge chunks of a HTTP response into the gien std:ostream object.
*/
void MergeChunkedResponse(std::istream& response, std::ostream& merged);
/**
* Send an HTTP request through the i2p proxy.
* @return the HTTP status code
*/
int httpRequestViaI2pProxy(const std::string& address, std::string &content);
/**
* @return the decoded url
*/
std::string urlDecode(const std::string& data);
/**
@ -73,7 +145,10 @@ namespace util
namespace net
{
int GetMTU (const boost::asio::ip::address& localAddress);
/**
* @return the maximum transmission unit, or 576 on failure
*/
int GetMTU(const boost::asio::ip::address& localAddress);
}
}
}