root/src/router/services/networking/ppp.c

/*
 * ppp.c
 *
 * Copyright (C) 2007 Sebastian Gottschall <gottschall@dd-wrt.com>
 *
 * 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 2
 * of the License.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id:
 */

#include <stdio.h>
#include <syslog.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <net/route.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <time.h>

#include <bcmnvram.h>
#include <netconf.h>
#include <shutils.h>
#include <rc.h>
#include "ledcontrol.h"

#include <code_pattern.h>
#include <cy_conf.h>
#include <utils.h>
#include <services.h>

#define IFUP (IFF_UP | IFF_RUNNING | IFF_BROADCAST | IFF_MULTICAST)


char *getenvs(char *env)
{
static unsigned char r[64];
char *e=getenv(env);
int c=0;
int i;
for (i=0;i<strlen(e);i++)
    {
    if (e[i]!=' ')
        r[c++]=e[i];
    }
return r;
}
/*
 * Called when link comes up
 */
int ipup_main(int argc, char **argv)
{
        FILE *fp;
        char *wan_ifname = safe_getenv("IFNAME");

        // char *wan_proto = nvram_safe_get("wan_proto");
        char *value;
        char buf[256];

        cprintf("%s\n", argv[0]);

        killall("listen", SIGKILL);
        nvram_set("wan_iface", wan_ifname);
        if (check_action() != ACT_IDLE)
                return -1;

        /*
         * ipup will receive bellow six arguments 
         */
        /*
         * interface-name tty-device speed local-IP-address remote-IP-address
         * ipparam 
         */

        /*
         * Touch connection file 
         */
        if (!(fp = fopen("/tmp/ppp/link", "a"))) {
                perror("/tmp/ppp/link");
                return errno;
        }
        fprintf(fp, "%s", argv[1]);
        fclose(fp);

        nvram_set("pppd_pppifname", wan_ifname);

        if (nvram_match("wan_proto", "pppoe"))
                nvram_set("pppoe_ifname", wan_ifname);

        if ((value = getenvs("IPLOCAL"))) {
                ifconfig(wan_ifname, IFUP, value, "255.255.255.255");
                if (nvram_match("wan_proto", "pppoe")) {
                        nvram_set("wan_ipaddr_buf", nvram_safe_get("wan_ipaddr"));      // Store 
                        nvram_set("wan_ipaddr", value);
                        nvram_set("wan_netmask", "255.255.255.255");
                } else if (nvram_match("wan_proto", "pptp")) {
                        nvram_set("wan_ipaddr_buf", nvram_safe_get("pptp_get_ip"));     // Store 
                        // last 
                        // ip 
                        // address
                        nvram_set("wan_ipaddr", value);
                        nvram_set("wan_netmask", "255.255.255.255");
                        nvram_set("pptp_get_ip", value);
                } else if (nvram_match("wan_proto", "l2tp")) {
                        nvram_set("wan_ipaddr_buf", nvram_safe_get("l2tp_get_ip"));     // Store 
                        // last 
                        // ip 
                        // address
                        nvram_set("l2tp_get_ip", value);
                }
#ifdef HAVE_3G
                else if (nvram_match("wan_proto", "3g")) {
                        nvram_set("wan_ipaddr_buf", nvram_safe_get("wan_ipaddr"));      // Store 
                        nvram_set("wan_ipaddr", value);
                        nvram_set("wan_netmask", "255.255.255.255");
                }
#endif
        }

        if ((value = getenvs("IPREMOTE"))) {
                nvram_set("wan_gateway", value);
                if (nvram_match("wan_proto", "pptp")) {
                        eval("route", "del", "default");
                        route_add(wan_ifname, 0, "0.0.0.0", value, "0.0.0.0");
                }
        }
        strcpy(buf, "");
        if (getenvs("DNS1"))
                sprintf(buf, "%s", getenvs("DNS1"));
        if (getenvs("DNS2"))
                sprintf(buf + strlen(buf), "%s%s", strlen(buf) ? " " : "",
                        getenvs("DNS2"));
        nvram_set("wan_get_dns", buf);

        if ((value = getenv("AC_NAME")))
                nvram_set("ppp_get_ac", value);
        if ((value = getenv("SRV_NAME")))
                nvram_set("ppp_get_srv", value);
        if ((value = getenv("MTU")))
                nvram_set("wan_run_mtu", value);
        start_wan_done(wan_ifname);
        cprintf("done\n");
        return 0;
}

/*
 * Called when link goes down
 */
int ipdown_main(int argc, char **argv)
{
        if (check_action() != ACT_IDLE)
                return -1;
        stop_ddns();
        stop_ntpc();

        unlink("/tmp/ppp/link");

        if (nvram_match("wan_proto", "l2tp")) {
                /*
                 * clear dns from the resolv.conf 
                 */
                nvram_set("wan_get_dns", "");
                dns_to_resolv();

                // todo
                route_del(nvram_safe_get("wan_ifname"), 0,
                          nvram_safe_get("l2tp_server_ip"),
                          nvram_safe_get("wan_gateway_buf"), "255.255.255.255");
                /*
                 * Restore the default gateway for WAN interface 
                 */
                nvram_set("wan_gateway", nvram_safe_get("wan_gateway_buf"));

                /*
                 * Set default route to gateway if specified 
                 */
                route_add(nvram_safe_get("wan_ifname"), 0, "0.0.0.0",
                          nvram_safe_get("wan_gateway"), "0.0.0.0");
        }
        if (nvram_match("wan_proto", "pptp")) {
                eval("route", "del", "default");
                nvram_set("wan_gateway", nvram_safe_get("wan_gateway_buf"));
                eval("route", "add", "default", "gw",
                     nvram_safe_get("wan_gateway"));
                sysprintf
                    ("iptables -t nat -A POSTROUTING -o %s -j MASQUERADE\n",
                     nvram_safe_get("pptp_ifname"));
        }

        nvram_set("pppoe_ifname", "");
        nvram_set("pppd_pppifname", "");

        // write PPP traffic statistics to nvram if wanted
        if (nvram_match("ppp_traffic", "1")) {
                char buffer[64];
                long long old_in, old_out;
                long long in, out;
                char *pin;
                char *pout;
                time_t stamp;

                old_in = atol(nvram_safe_get("ppp_byte_in"));
                old_out = atol(nvram_safe_get("ppp_byte_out"));

                if ((pin = getenv("BYTES_RCVD")))
                        in = atol(pin);
                else
                        in = 0;

                if ((pout = getenv("BYTES_SENT")))
                        out = atol(pout);
                else
                        out = 0;

                in += old_in;
                out += old_out;
                snprintf(buffer, 63, "%lld", in);
                nvram_set("ppp_byte_in", buffer);
                snprintf(buffer, 63, "%lld", out);
                nvram_set("ppp_byte_out", buffer);
                if ((stamp = time(NULL)) < 1087818160)  // clock is not set
                        // properly
                        stamp = 0;
                snprintf(buffer, 63, "%ld", stamp);
                nvram_set("ppp_byte_stamp", buffer);
                nvram_commit();
        }

        if (nvram_match("ppp_demand", "1")
            && (nvram_match("wan_proto", "pptp")
                || nvram_match("wan_proto", "l2tp"))) {
                killall("listen", SIGKILL);
                eval("listen", nvram_safe_get("lan_ifname"));
        }

        return 1;
}

/*
 * int pppevent_main (int argc, char **argv) { int argn; char *type = NULL;
 * 
 * argn = 1; while (argn < argc && argv[argn][0] == '-') { if (strcmp
 * (argv[argn], "-t") == 0) { ++argn; type = argv[argn]; } ++argn; }
 * 
 * if (!type) return 1;
 * 
 * 
 * if (!strcmp (type, "PAP_AUTH_FAIL") || !strcmp (type, "CHAP_AUTH_FAIL")) {
 * 
 * buf_to_file ("/tmp/ppp/log", type);
 * 
 * if (check_hw_type () == BCM4704_BCM5325F_CHIP) SET_LED (GET_IP_ERROR); }
 * 
 * return 0; }
 * 
 * //=============================================================================
 * int set_pppoepid_to_nv_main (int argc, char **argv) // tallest 1219 { if
 * (!strcmp (argv[1], "0")) { nvram_set ("pppoe_pid0", getenv ("PPPD_PID"));
 * nvram_set ("pppoe_ifname0", getenv ("IFNAME")); } else if (!strcmp (argv[1],
 * "1")) { nvram_set ("pppoe_pid1", getenv ("PPPD_PID")); nvram_set
 * ("pppoe_ifname1", getenv ("IFNAME")); }
 * 
 * dprintf ("done.( IFNAME = %s DEVICE = %s )\n", getenv ("IFNAME"), getenv
 * ("DEVICE")); return 0; }
 */

// by tallest 0407
int disconnected_pppoe_main(int argc, char **argv)
{
        int pppoe_num = atoi(argv[1]);
        char ppp_demand[2][20] = { "ppp_demand", "ppp_demand_1" };

        if (nvram_match(ppp_demand[pppoe_num], "1")
            && nvram_match("action_service", "")) {
                cprintf("tallest:=====( kill pppoe %d )=====\n", pppoe_num);
                stop_single_pppoe(pppoe_num);
                start_pppoe(pppoe_num);
                dns_to_resolv();

                stop_dnsmasq();
                start_dnsmasq();

                return 0;
        }
        cprintf("tallest:=====( PPPOE Dial On Demand Error!! )=====\n");
        return 0;
}

// =============================================================================