mirror of
https://github.com/OpenVPN/openvpn3.git
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89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2015 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef OPENVPN_COMMON_PEERCRED_H
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#define OPENVPN_COMMON_PEERCRED_H
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <openvpn/common/platform.hpp>
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#include <openvpn/common/exception.hpp>
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#ifdef OPENVPN_PLATFORM_TYPE_APPLE
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#include <sys/ucred.h>
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#endif
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namespace openvpn {
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namespace SockOpt {
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struct Creds
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{
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Creds(const int uid_arg=-1, const int gid_arg=-1, const int pid_arg=-1)
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: uid(uid_arg),
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gid(gid_arg),
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pid(pid_arg)
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{
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}
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bool root_or_self_uid() const
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{
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return !uid || uid == ::getuid();
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}
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bool root_uid() const
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{
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return !uid;
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}
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int uid;
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int gid;
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int pid;
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};
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// get credentials of process on other side of unix socket
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inline bool peercreds(const int fd, Creds& cr)
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{
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#if defined(OPENVPN_PLATFORM_TYPE_APPLE)
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xucred cred;
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socklen_t credLen = sizeof(cred);
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if (::getsockopt(fd, SOL_LOCAL, LOCAL_PEERCRED, &cred, &credLen) != 0)
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return false;
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cr = Creds(cred.cr_uid, cred.cr_gid);
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return true;
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#elif defined(OPENVPN_PLATFORM_LINUX)
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struct ucred uc;
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socklen_t uc_len = sizeof(uc);
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if (::getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &uc, &uc_len) != 0)
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return false;
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cr = Creds(uc.uid, uc.gid, uc.pid);
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return true;
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#else
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#error no implementation for peercreds()
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#endif
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}
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}
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}
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#endif
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