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/*
*
* PPP library with GLib integration
*
* Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include <glib.h>
#include <arpa/inet.h>
#include "gatppp.h"
#include "ppp.h"
enum lcp_options {
RESERVED = 0,
MRU = 1,
ACCM = 2,
AUTH_PROTO = 3,
QUAL_PROTO = 4,
MAGIC_NUMBER = 5,
DEPRECATED_QUAL_PROTO = 6,
PFC = 7,
ACFC = 8,
};
#define LCP_SUPPORTED_CODES ((1 << CONFIGURE_REQUEST) | \
(1 << CONFIGURE_ACK) | \
(1 << CONFIGURE_NAK) | \
(1 << CONFIGURE_REJECT) | \
(1 << TERMINATE_REQUEST) | \
(1 << TERMINATE_ACK) | \
(1 << CODE_REJECT) | \
(1 << PROTOCOL_REJECT) | \
(1 << ECHO_REQUEST) | \
(1 << ECHO_REPLY) | \
(1 << DISCARD_REQUEST))
/*
* signal the Up event to the NCP
*/
static void lcp_up(struct pppcp_data *pppcp)
{
ppp_generate_event(pppcp->ppp, PPP_OPENED);
}
/*
* signal the Down event to the NCP
*/
static void lcp_down(struct pppcp_data *pppcp)
{
/* XXX should implement a way to signal NCP */
}
/*
* Indicate that the lower layer is now needed
* Should trigger Up event
*/
static void lcp_started(struct pppcp_data *pppcp)
{
ppp_generate_event(pppcp->ppp, PPP_UP);
}
/*
* Indicate that the lower layer is not needed
* Should trigger Down event
*/
static void lcp_finished(struct pppcp_data *pppcp)
{
ppp_generate_event(pppcp->ppp, PPP_DOWN);
}
/*
* Scan the option to see if it is acceptable, unacceptable, or rejected
*
* We need to use a default case here because this option type value
* could be anything.
*/
static guint lcp_option_scan(struct ppp_option *option, gpointer user)
{
switch (option->type) {
case ACCM:
case AUTH_PROTO:
/* XXX check to make sure it's a proto we recognize */
case MAGIC_NUMBER:
case PFC:
case ACFC:
return OPTION_ACCEPT;
}
return OPTION_REJECT;
}
/*
* act on an acceptable option
*
* We need to use a default case here because this option type value
* could be anything.
*/
static void lcp_option_process(gpointer data, gpointer user)
{
struct ppp_option *option = data;
struct pppcp_data *pppcp = user;
GAtPPP *ppp = pppcp->ppp;
guint32 magic;
switch (option->type) {
case ACCM:
ppp_set_recv_accm(ppp, get_host_long(option->data));
break;
case AUTH_PROTO:
ppp_set_auth(ppp, option->data);
break;
case MAGIC_NUMBER:
/* XXX handle loopback */
magic = get_host_long(option->data);
if (magic != pppcp->magic_number)
pppcp->magic_number = magic;
else
g_print("looped back? I should do something\n");
break;
case PFC:
ppp_set_pfc(ppp, TRUE);
break;
case ACFC:
ppp_set_acfc(ppp, TRUE);
break;
default:
g_printerr("unhandled option %d\n", option->type);
break;
}
}
static const char *lcp_option_strings[256] = {
[0] = "Vendor Specific",
[1] = "Maximum-Receive-Unit",
[2] = "Async-Control-Character-Map",
[3] = "Authentication-Protocol",
[4] = "Quality-Protocol",
[5] = "Magic-Number",
[6] = "Quality-Protocol (deprecated)",
[7] = "Protocol-Field-Compression",
[8] = "Address-and-Control-Field-Compression",
[9] = "FCS-Alternatives",
[10] = "Self-Describing-Pad",
[11] = "Numbered-Mode",
[12] = "Multi-Link-Procedure (deprecated)",
[13] = "Callback",
};
struct pppcp_action lcp_action = {
.this_layer_up = lcp_up,
.this_layer_down = lcp_down,
.this_layer_started = lcp_started,
.this_layer_finished = lcp_finished,
.option_scan = lcp_option_scan,
.option_process = lcp_option_process,
};
void lcp_open(struct pppcp_data *data)
{
if (data == NULL)
return;
/* send an open event to the lcp layer */
pppcp_generate_event(data, OPEN, NULL, 0);
}
void lcp_establish(struct pppcp_data *data)
{
if (data == NULL)
return;
/* send an UP event to the lcp layer */
pppcp_generate_event(data, UP, NULL, 0);
}
void lcp_terminate(struct pppcp_data *data)
{
if (data == NULL)
return;
/* send a CLOSE event to the lcp layer */
pppcp_generate_event(data, CLOSE, NULL, 0);
}
void lcp_free(struct pppcp_data *lcp)
{
if (lcp == NULL)
return;
pppcp_free(lcp);
}
void lcp_protocol_reject(struct pppcp_data *lcp, guint8 *packet, gsize len)
{
pppcp_send_protocol_reject(lcp, packet, len);
}
struct pppcp_data *lcp_new(GAtPPP *ppp)
{
struct pppcp_data *pppcp;
struct ppp_option *option;
guint16 codes = LCP_SUPPORTED_CODES;
pppcp = pppcp_new(ppp, LCP_PROTOCOL);
if (!pppcp) {
g_print("Failed to allocate PPPCP struct\n");
return NULL;
}
pppcp_set_valid_codes(pppcp, codes);
pppcp->option_strings = lcp_option_strings;
pppcp->prefix = "lcp";
pppcp->priv = pppcp;
/* set the actions */
pppcp->action = &lcp_action;
/* add the default config options */
option = g_try_malloc0(6);
if (option == NULL) {
pppcp_free(pppcp);
return NULL;
}
option->type = ACCM;
option->length = 6;
pppcp_add_config_option(pppcp, option);
return pppcp;
}
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