BSDSocketProtocol.cc

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//
// Copyright (c) 2020 Fraunhofer Institute for Applied Information Technology (FIT)
//                    Network Research Group (NET)
//                    Schloss Birlinghoven, 53754 Sankt Augustin, GERMANY
//                    Contact: support@wiback.org
//
// This file is part of the SENF code tree.
// It is licensed under the 3-clause BSD License (aka New BSD License).
// See LICENSE.txt in the top level directory for details or visit
// https://opensource.org/licenses/BSD-3-Clause
//


#include <senf/Utils/String.hh>
#include "BSDSocketProtocol.hh"
//#include "BSDSocketProtocol.ih"

// Custom includes
#include <linux/filter.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/ip.h>


//#include "BSDSocketProtocol.mpp"
#define prefix_
//-/////////////////////////////////////////////////////////////////////////////////////////////////

prefix_ std::pair<bool,unsigned> senf::BSDSocketProtocol::linger()
    const
{
    struct linger ling;
    socklen_t len = sizeof(ling);
    ::memset(&ling, 0, sizeof(ling));
    if (::getsockopt(fd(),SOL_SOCKET,SO_LINGER,&ling,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_LINGER");
    return std::make_pair(ling.l_onoff, ling.l_linger);
}

prefix_ void senf::BSDSocketProtocol::linger(bool enable, unsigned timeout)
    const
{
    struct linger ling;
    ling.l_onoff = enable;
    ling.l_linger = timeout;
    if (::setsockopt(fd(),SOL_SOCKET,SO_LINGER,&ling,sizeof(ling)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set socketopt SO_LINGER");
}

prefix_ boost::uint8_t senf::BSDSocketProtocol::priority()
    const
{
    int value;
    socklen_t len (sizeof(value));
    if (::getsockopt(fd(),SOL_SOCKET,SO_PRIORITY,&value,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_PRIORITY");
    return value;
}

prefix_ void senf::BSDSocketProtocol::priority(boost::uint8_t value)
    const
{
    int ivalue (value);
    if (::setsockopt(fd(),SOL_SOCKET,SO_PRIORITY,&ivalue,sizeof(ivalue)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set socketopt SO_PRIORITY to "  + senf::str(value));
}

prefix_ int senf::BSDSocketProtocol::error()
    const
{
    int err;
    socklen_t len (sizeof(err));
    if (::getsockopt(fd(),SOL_SOCKET,SO_ERROR,&err,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_ERROR");
    return err;
}

prefix_ unsigned senf::BSDSocketProtocol::rcvbuf()
    const
{
    unsigned size;
    socklen_t len (sizeof(size));
    if (::getsockopt(fd(),SOL_SOCKET,SO_RCVBUF,&size,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_RCVBUF");
    // Linux doubles the bufer size on setting the RCVBUF to cater for internal
    // headers. We fix this up here .. (see lkml FAQ)
    return size/2;
}

prefix_ void senf::BSDSocketProtocol::rcvbuf(unsigned size)
    const
{
    if (::setsockopt(fd(),SOL_SOCKET,SO_RCVBUF,&size,sizeof(size)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set socketopt SO_RCVBUF to" + senf::str(size));
}

prefix_ unsigned senf::BSDSocketProtocol::sndbuf()
    const
{
    unsigned size;
    socklen_t len (sizeof(size));
    if (::getsockopt(fd(),SOL_SOCKET,SO_SNDBUF,&size,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_SNDBUF");
    // Linux doubles the bufer size on setting the SNDBUF to cater for internal
    // headers. We fix this up here .. (see lkml FAQ)
    return size/2;
}

prefix_ void senf::BSDSocketProtocol::sndbuf(unsigned size)
    const
{
    if (::setsockopt(fd(),SOL_SOCKET,SO_SNDBUF,&size,sizeof(size)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set socketopt SO_SNDBUF to " + senf::str(size));
}

prefix_ void senf::BSDSocketProtocol::detachSocketFilter()
{
    int dummy;
    if (::setsockopt(fd(), SOL_SOCKET, SO_DETACH_FILTER, &dummy, sizeof(dummy)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not detach socket filter");
}

prefix_ void senf::BSDSocketProtocol::do_attachSocketFilter(::sock_filter * filter, unsigned short len)
{
    struct sock_fprog sockArg;
    sockArg.filter = filter;
    sockArg.len = len;
    if (::setsockopt(fd(), SOL_SOCKET, SO_ATTACH_FILTER, &sockArg, sizeof(sockArg)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not attach socket filter");
}

prefix_ void senf::BSDSocketProtocol::mtuDiscovery(int mode) 
    const
{
    if (::setsockopt(fd(), IPPROTO_IP, IP_MTU_DISCOVER, &mode, sizeof(mode)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set IP_MTU_DISCOVER mode to " + senf::str(mode));
}

prefix_ void senf::BSDSocketProtocol::sndLowat(unsigned lowat)
    const
{
    if (::setsockopt(fd(), SOL_SOCKET, SO_SNDLOWAT, &lowat, sizeof(lowat)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set SO_SNDLOWAT to " + senf::str(lowat));
}

prefix_ void senf::BSDSocketProtocol::rcvLowat(unsigned lowat)
    const
{
    if (::setsockopt(fd(), SOL_SOCKET, SO_RCVLOWAT, &lowat, sizeof(lowat)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set SO_RCVLOWAT to " + senf::str(lowat));
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////

prefix_ bool senf::AddressableBSDSocketProtocol::reuseaddr()
    const
{
    int value;
    socklen_t len (sizeof(value));
    if (::getsockopt(fd(),SOL_SOCKET,SO_REUSEADDR,&value,&len) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not get socketopt SO_REUSEADDR");
    return value;
}

prefix_ void senf::AddressableBSDSocketProtocol::reuseaddr(bool value)
    const
{
    int ivalue (value);
    if (::setsockopt(fd(),SOL_SOCKET,SO_REUSEADDR,&ivalue,sizeof(ivalue)) < 0)
        SENF_THROW_SYSTEM_EXCEPTION("could not set socketopt SO_REUSEADDR");
}

//-/////////////////////////////////////////////////////////////////////////////////////////////////
#undef prefix_
//#include "BSDSocketProtocol.mpp"


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// ispell-local-dictionary: "american"
// compile-command: "scons -u test"
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