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// Copyright (c) 2009-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <net_permissions.h>
#include <netbase.h>
#include <util/error.h>
#include <util/system.h>
#include <util/translation.h>
// The parse the following format "perm1,perm2@xxxxxx"
bool TryParsePermissionFlags(const std::string str, NetPermissionFlags& output, size_t& readen, std::string& error)
{
NetPermissionFlags flags = PF_NONE;
const auto atSeparator = str.find('@');
// if '@' is not found (ie, "xxxxx"), the caller should apply implicit permissions
if (atSeparator == std::string::npos) {
NetPermissions::AddFlag(flags, PF_ISIMPLICIT);
readen = 0;
}
// else (ie, "perm1,perm2@xxxxx"), let's enumerate the permissions by splitting by ',' and calculate the flags
else {
readen = 0;
// permissions == perm1,perm2
const auto permissions = str.substr(0, atSeparator);
while (readen < permissions.length()) {
const auto commaSeparator = permissions.find(',', readen);
const auto len = commaSeparator == std::string::npos ? permissions.length() - readen : commaSeparator - readen;
// permission == perm1
const auto permission = permissions.substr(readen, len);
readen += len; // We read "perm1"
if (commaSeparator != std::string::npos) readen++; // We read ","
if (permission == "bloomfilter" || permission == "bloom") NetPermissions::AddFlag(flags, PF_BLOOMFILTER);
else if (permission == "noban") NetPermissions::AddFlag(flags, PF_NOBAN);
else if (permission == "forcerelay") NetPermissions::AddFlag(flags, PF_FORCERELAY);
else if (permission == "mempool") NetPermissions::AddFlag(flags, PF_MEMPOOL);
else if (permission == "all") NetPermissions::AddFlag(flags, PF_ALL);
else if (permission == "relay") NetPermissions::AddFlag(flags, PF_RELAY);
else if (permission.length() == 0); // Allow empty entries
else {
error = strprintf(_("Invalid P2P permission: '%s'").translated, permission);
return false;
}
}
readen++;
}
output = flags;
error = "";
return true;
}
std::vector<std::string> NetPermissions::ToStrings(NetPermissionFlags flags)
{
std::vector<std::string> strings;
if (NetPermissions::HasFlag(flags, PF_BLOOMFILTER)) strings.push_back("bloomfilter");
if (NetPermissions::HasFlag(flags, PF_NOBAN)) strings.push_back("noban");
if (NetPermissions::HasFlag(flags, PF_FORCERELAY)) strings.push_back("forcerelay");
if (NetPermissions::HasFlag(flags, PF_RELAY)) strings.push_back("relay");
if (NetPermissions::HasFlag(flags, PF_MEMPOOL)) strings.push_back("mempool");
return strings;
}
bool NetWhitebindPermissions::TryParse(const std::string str, NetWhitebindPermissions& output, std::string& error)
{
NetPermissionFlags flags;
size_t offset;
if (!TryParsePermissionFlags(str, flags, offset, error)) return false;
const std::string strBind = str.substr(offset);
CService addrBind;
if (!Lookup(strBind.c_str(), addrBind, 0, false)) {
error = ResolveErrMsg("whitebind", strBind);
return false;
}
if (addrBind.GetPort() == 0) {
error = strprintf(_("Need to specify a port with -whitebind: '%s'").translated, strBind);
return false;
}
output.m_flags = flags;
output.m_service = addrBind;
error = "";
return true;
}
bool NetWhitelistPermissions::TryParse(const std::string str, NetWhitelistPermissions& output, std::string& error)
{
NetPermissionFlags flags;
size_t offset;
if (!TryParsePermissionFlags(str, flags, offset, error)) return false;
const std::string net = str.substr(offset);
CSubNet subnet;
LookupSubNet(net.c_str(), subnet);
if (!subnet.IsValid()) {
error = strprintf(_("Invalid netmask specified in -whitelist: '%s'").translated, net);
return false;
}
output.m_flags = flags;
output.m_subnet = subnet;
error = "";
return true;
}
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