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/* This file is part of mailfromd. -*- c -*-
Copyright (C) 2007, 2008 Sergey Poznyakoff
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
MF_DEFUN(ntohl, NUMBER, NUMBER n)
{
MF_RETURN(ntohl((uint32_t) n));
}
END
MF_DEFUN(htonl, NUMBER, NUMBER n)
{
MF_RETURN(htonl((uint32_t) n));
}
END
/* FIXME: The following functions assume binary complement arithmetics.
This is hardly a limitation, the similar approach works in GNU Radius
for years. Nevertheless, this assumption should be noted. */
MF_DEFUN(ntohs, NUMBER, NUMBER n)
{
MF_RETURN((uint32_t) ntohs(((uint16_t) n) & 0xffff));
}
END
MF_DEFUN(htons, NUMBER, NUMBER n)
{
MF_RETURN((uint32_t) htons(((uint16_t) n) & 0xffff));
}
END
MF_DEFUN(inet_aton, NUMBER, STRING s)
{
struct in_addr addr;
MF_ASSERT(inet_aton(s, &addr),
mfe_invip,
_("Invalid IP address (%s)"),
s);
MF_RETURN(ntohl(addr.s_addr));
}
END
MF_DEFUN(inet_ntoa, STRING, NUMBER ip)
{
struct in_addr addr;
addr.s_addr = htonl(ip);
MF_RETURN_STRING(inet_ntoa(addr));
}
END
MF_DEFUN(len_to_netmask, NUMBER, NUMBER x)
{
unsigned long n = (unsigned long) x;
unsigned long netmask;
MF_ASSERT(n <= 32, mfe_range,
_("Invalid netmask: %lu"), n);
n = 32 - n;
if (n == 32)
netmask = 0;
else
netmask = (0xfffffffful >> n) << n;
MF_RETURN(netmask);
}
END
MF_DEFUN(netmask_to_len, NUMBER, NUMBER x)
{
unsigned long n = (unsigned long) x;
unsigned long i;
for (i = 32; i > 0; i--) {
if (n & 1)
break;
n >>= 1;
}
MF_RETURN(i);
}
END
MF_INIT
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