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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 <arpa/inet.h>
#include <glib.h>
#include "gatutil.h"
#include "gatppp.h"
#include "ppp.h"
#define IPCP_SUPPORTED_CODES ((1 << PPPCP_CODE_TYPE_CONFIGURE_REQUEST) | \
(1 << PPPCP_CODE_TYPE_CONFIGURE_ACK) | \
(1 << PPPCP_CODE_TYPE_CONFIGURE_NAK) | \
(1 << PPPCP_CODE_TYPE_CONFIGURE_REJECT) | \
(1 << PPPCP_CODE_TYPE_TERMINATE_REQUEST) | \
(1 << PPPCP_CODE_TYPE_TERMINATE_ACK) | \
(1 << PPPCP_CODE_TYPE_CODE_REJECT))
enum ipcp_option_types {
IP_ADDRESSES = 1,
IP_COMPRESSION_PROTO = 2,
IP_ADDRESS = 3,
MOBILE_IPV4 = 4,
PRIMARY_DNS_SERVER = 129,
PRIMARY_NBNS_SERVER = 130,
SECONDARY_DNS_SERVER = 131,
SECONDARY_NBNS_SERVER = 132,
};
/* We request IP_ADDRESS, PRIMARY/SECONDARY DNS & NBNS */
#define MAX_CONFIG_OPTION_SIZE 5*6
#define REQ_OPTION_IPADDR 0x01
#define REQ_OPTION_DNS1 0x02
#define REQ_OPTION_DNS2 0x04
#define REQ_OPTION_NBNS1 0x08
#define REQ_OPTION_NBNS2 0x10
struct ipcp_data {
guint8 options[MAX_CONFIG_OPTION_SIZE];
guint16 options_len;
guint8 req_options;
guint32 ipaddr;
guint32 dns1;
guint32 dns2;
guint32 nbns1;
guint32 nbns2;
};
#define FILL_IP(req, type, var) \
if (req) { \
ipcp->options[len] = type; \
ipcp->options[len + 1] = 6; \
memcpy(ipcp->options + len + 2, var, 4); \
\
len += 6; \
} \
static void ipcp_generate_config_options(struct ipcp_data *ipcp)
{
guint16 len = 0;
FILL_IP(ipcp->req_options & REQ_OPTION_IPADDR,
IP_ADDRESS, &ipcp->ipaddr);
FILL_IP(ipcp->req_options & REQ_OPTION_DNS1,
PRIMARY_DNS_SERVER, &ipcp->dns1);
FILL_IP(ipcp->req_options & REQ_OPTION_DNS2,
SECONDARY_DNS_SERVER, &ipcp->dns2);
FILL_IP(ipcp->req_options & REQ_OPTION_NBNS1,
PRIMARY_NBNS_SERVER, &ipcp->nbns1);
FILL_IP(ipcp->req_options & REQ_OPTION_NBNS2,
SECONDARY_NBNS_SERVER, &ipcp->nbns2);
ipcp->options_len = len;
}
static void ipcp_reset_config_options(struct ipcp_data *ipcp)
{
ipcp->req_options = REQ_OPTION_IPADDR | REQ_OPTION_DNS1 |
REQ_OPTION_DNS2 | REQ_OPTION_NBNS1 |
REQ_OPTION_NBNS2;
ipcp->ipaddr = 0;
ipcp->dns1 = 0;
ipcp->dns2 = 0;
ipcp->nbns1 = 0;
ipcp->nbns2 = 0;
ipcp_generate_config_options(ipcp);
}
static void ipcp_up(struct pppcp_data *pppcp)
{
struct ipcp_data *ipcp = pppcp_get_data(pppcp);
char ip[INET_ADDRSTRLEN];
char dns1[INET_ADDRSTRLEN];
char dns2[INET_ADDRSTRLEN];
struct in_addr addr;
memset(ip, 0, sizeof(ip));
addr.s_addr = ipcp->ipaddr;
inet_ntop(AF_INET, &addr, ip, INET_ADDRSTRLEN);
memset(dns1, 0, sizeof(dns1));
addr.s_addr = ipcp->dns1;
inet_ntop(AF_INET, &addr, dns1, INET_ADDRSTRLEN);
memset(dns2, 0, sizeof(dns2));
addr.s_addr = ipcp->dns2;
inet_ntop(AF_INET, &addr, dns2, INET_ADDRSTRLEN);
ppp_net_up_notify(pppcp_get_ppp(pppcp), ip[0] ? ip : NULL,
dns1[0] ? dns1 : NULL,
dns2[0] ? dns2 : NULL);
}
static void ipcp_down(struct pppcp_data *pppcp)
{
struct ipcp_data *ipcp = pppcp_get_data(pppcp);
ipcp_reset_config_options(ipcp);
pppcp_set_local_options(pppcp, ipcp->options, ipcp->options_len);
ppp_net_down_notify(pppcp_get_ppp(pppcp));
}
static void ipcp_finished(struct pppcp_data *pppcp)
{
}
static void ipcp_rca(struct pppcp_data *pppcp,
const struct pppcp_packet *packet)
{
struct ipcp_data *ipcp = pppcp_get_data(pppcp);
struct ppp_option_iter iter;
ppp_option_iter_init(&iter, packet);
while (ppp_option_iter_next(&iter) == TRUE) {
const guint8 *data = ppp_option_iter_get_data(&iter);
switch (ppp_option_iter_get_type(&iter)) {
case IP_ADDRESS:
memcpy(&ipcp->ipaddr, data, 4);
break;
case PRIMARY_DNS_SERVER:
memcpy(&ipcp->dns1, data, 4);
break;
case PRIMARY_NBNS_SERVER:
memcpy(&ipcp->nbns1, data, 4);
break;
case SECONDARY_DNS_SERVER:
memcpy(&ipcp->dns2, data, 4);
break;
case SECONDARY_NBNS_SERVER:
memcpy(&ipcp->nbns2, data, 4);
break;
default:
break;
}
}
}
static void ipcp_rcn_nak(struct pppcp_data *pppcp,
const struct pppcp_packet *packet)
{
struct ipcp_data *ipcp = pppcp_get_data(pppcp);
struct ppp_option_iter iter;
g_print("Received IPCP NAK\n");
ppp_option_iter_init(&iter, packet);
while (ppp_option_iter_next(&iter) == TRUE) {
const guint8 *data = ppp_option_iter_get_data(&iter);
switch (ppp_option_iter_get_type(&iter)) {
case IP_ADDRESS:
g_print("Setting suggested ip addr\n");
ipcp->req_options |= REQ_OPTION_IPADDR;
memcpy(&ipcp->ipaddr, data, 4);
break;
case PRIMARY_DNS_SERVER:
g_print("Setting suggested dns1\n");
ipcp->req_options |= REQ_OPTION_DNS1;
memcpy(&ipcp->dns1, data, 4);
break;
case PRIMARY_NBNS_SERVER:
g_print("Setting suggested nbns1\n");
ipcp->req_options |= REQ_OPTION_NBNS1;
memcpy(&ipcp->nbns1, data, 4);
break;
case SECONDARY_DNS_SERVER:
g_print("Setting suggested dns2\n");
ipcp->req_options |= REQ_OPTION_DNS2;
memcpy(&ipcp->dns2, data, 4);
break;
case SECONDARY_NBNS_SERVER:
g_print("Setting suggested nbns2\n");
ipcp->req_options |= REQ_OPTION_NBNS2;
memcpy(&ipcp->nbns2, data, 4);
break;
default:
break;
}
}
ipcp_generate_config_options(ipcp);
pppcp_set_local_options(pppcp, ipcp->options, ipcp->options_len);
}
static void ipcp_rcn_rej(struct pppcp_data *pppcp,
const struct pppcp_packet *packet)
{
struct ipcp_data *ipcp = pppcp_get_data(pppcp);
struct ppp_option_iter iter;
ppp_option_iter_init(&iter, packet);
while (ppp_option_iter_next(&iter) == TRUE) {
switch (ppp_option_iter_get_type(&iter)) {
case IP_ADDRESS:
ipcp->req_options &= ~REQ_OPTION_IPADDR;
break;
case PRIMARY_DNS_SERVER:
ipcp->req_options &= ~REQ_OPTION_DNS1;
break;
case PRIMARY_NBNS_SERVER:
ipcp->req_options &= ~REQ_OPTION_NBNS1;
break;
case SECONDARY_DNS_SERVER:
ipcp->req_options &= ~REQ_OPTION_DNS2;
break;
case SECONDARY_NBNS_SERVER:
ipcp->req_options &= ~REQ_OPTION_NBNS2;
break;
default:
break;
}
}
ipcp_generate_config_options(ipcp);
pppcp_set_local_options(pppcp, ipcp->options, ipcp->options_len);
}
static enum rcr_result ipcp_rcr(struct pppcp_data *pppcp,
const struct pppcp_packet *packet,
guint8 **new_options, guint16 *new_len)
{
struct ppp_option_iter iter;
ppp_option_iter_init(&iter, packet);
if (ppp_option_iter_next(&iter) == FALSE)
return RCR_ACCEPT;
/* Reject all options */
*new_len = packet->length - sizeof(*packet);
*new_options = g_memdup(packet->data, *new_len);
return RCR_REJECT;
}
struct pppcp_proto ipcp_proto = {
.proto = IPCP_PROTO,
.name = "ipcp",
.supported_codes = IPCP_SUPPORTED_CODES,
.this_layer_up = ipcp_up,
.this_layer_down = ipcp_down,
.this_layer_finished = ipcp_finished,
.rca = ipcp_rca,
.rcn_nak = ipcp_rcn_nak,
.rcn_rej = ipcp_rcn_rej,
.rcr = ipcp_rcr,
};
struct pppcp_data *ipcp_new(GAtPPP *ppp)
{
struct ipcp_data *ipcp;
struct pppcp_data *pppcp;
ipcp = g_try_new0(struct ipcp_data, 1);
if (!ipcp)
return NULL;
pppcp = pppcp_new(ppp, &ipcp_proto);
if (!pppcp) {
g_printerr("Failed to allocate PPPCP struct\n");
g_free(ipcp);
return NULL;
}
pppcp_set_data(pppcp, ipcp);
ipcp_reset_config_options(ipcp);
pppcp_set_local_options(pppcp, ipcp->options, ipcp->options_len);
return pppcp;
}
void ipcp_free(struct pppcp_data *data)
{
struct ipcp_data *ipcp = pppcp_get_data(data);
g_free(ipcp);
pppcp_free(data);
}
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