kea/src/lib/acl/ip_check.cc

// Copyright (C) 2011  Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include <sys/socket.h>

#include <exceptions/exceptions.h>

#include <acl/ip_check.h>

using namespace isc;

namespace isc {
namespace acl {

namespace {
const uint8_t*
getSockAddrData(const struct sockaddr& sa) {
    const void* sa_ptr = &sa;
    const void* data_ptr;
    if (sa.sa_family == AF_INET) {
        const struct sockaddr_in* sin =
            static_cast<const struct sockaddr_in*>(sa_ptr);
        data_ptr = &sin->sin_addr;
    } else if (sa.sa_family == AF_INET6) {
        const struct sockaddr_in6* sin6 =
            static_cast<const struct sockaddr_in6*>(sa_ptr);
        data_ptr = &sin6->sin6_addr;
    } else {
        isc_throw(BadValue, "Unsupported address family for IPAddress: " <<
                  static_cast<int>(sa.sa_family));
    }
    return (static_cast<const uint8_t*>(data_ptr));
}
}

IPAddress::IPAddress(const struct sockaddr& sa) :
    family(sa.sa_family),
    data(getSockAddrData(sa)),
    length(family == AF_INET ?
           sizeof(struct in_addr) : sizeof(struct in6_addr))
{}
} // namespace acl
} // namespace isc