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/*******************************************************************************
* libproxy - A library for proxy configuration
* Copyright (C) 2006 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include "misc.h"
#include "dhcp.h"
#include "dns.h"
#include "slp.h"
#include "wpad.h"
struct _pxWPAD {
pxDHCP *dhcp;
pxDNS *dns;
pxSLP *slp;
bool found;
};
/**
* Create a new WPAD object (for detecting PAC locations)
* @return A New WPAD object
*/
pxWPAD *
px_wpad_new()
{
return px_wpad_new_full(NULL, NULL, NULL);
}
/**
* Creates a new WPAD object with more options.
* For all options, ownership is stolen by the new WPAD object.
* In other words, don't pass a detector to this function and then use it
* later (or free it).
* @dhcp The DHCP detector to use (or NULL for the default detector)
* @dns The DNS detector to use (or NULL for the default detector)
* @slp The SLP detector to use (or NULL for the default detector)
* @return New DNS PAD detector
*/
pxWPAD *
px_wpad_new_full(pxDHCP *dhcp, pxDNS *dns, pxSLP *slp)
{
if (!dhcp) dhcp = px_dhcp_new();
if (!dns) dns = px_dns_new();
if (!slp) slp = px_slp_new();
pxWPAD *self = px_malloc0(sizeof(pxWPAD));
self->dhcp = dhcp;
self->dns = dns;
self->slp = slp;
return self;
}
/**
* Detect the next PAC in the chain.
* @return Detected PAC or NULL if none is found
*/
pxPAC *
px_wpad_next(pxWPAD *self)
{
if (!self) return NULL;
// Check all the detectors for a PAC
pxPAC *pac = NULL;
if (!(pac = px_dhcp_next(self->dhcp)))
if (!(pac = px_slp_next(self->slp)))
pac = px_dns_next(self->dns);
if (pac) self->found = true;
return pac;
}
/**
* Restarts the detection chain at the beginning.
*/
void
px_wpad_rewind(pxWPAD *self)
{
if (!self) return;
px_dhcp_rewind(self->dhcp);
px_dns_rewind(self->dns);
px_slp_rewind(self->slp);
self->found = false;
}
/**
* Frees a WPAD object.
*/
void
px_wpad_free(pxWPAD *self)
{
if (!self) return;
px_dhcp_free(self->dhcp);
px_dns_free(self->dns);
px_slp_free(self->slp);
px_free(self);
}
/**
* Returns whether or not a PAC was found during this detection cycle.
* Always returns false if called directly after wpad_wpad_rewind().
* @return Whether or not a PAC was found
*/
bool
px_wpad_pac_found(pxWPAD *self)
{
if (!self) return false;
return self->found;
}
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