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