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/*
* Mini udhcpc_script implementation for busybox.
*
* Copyright (C) 2004 by David Seikel won_fang@yahoo.com.au
*
* 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, 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
*/
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "busybox.h"
#include "lib_init_d.h"
static void printit(char *name, char *description, char *value)
{
if (value != NULL)
bb_printf("%s=%s\t\t- %s\n", name, value, description);
}
int udhcpc_script_main(int argc, char **argv)
{
argv += optind;
#if 0
printit("action", "What action the script should perform", *argv);
printit("HOME", "The set $HOME env or '/'", getenv("HOME"));
printit("PATH", "the set $PATH env or '/bin:/usr/bin:/sbin:/usr/sbin'", getenv("PATH"));
printit("interface", "The interface this was obtained on", getenv("interface"));
printit("ip", "The obtained IP", getenv("ip"));
printit("mask", "The number of bits in the netmask (ie: 24)", getenv("mask"));
printit("siaddr", "The bootp next server option", getenv("siaddr"));
printit("sname", "The bootp server name option", getenv("sname"));
printit("boot_file", "The bootp boot file option", getenv("boot_file"));
printit("subnet", "The assigend subnet mask", getenv("subnet"));
printit("timezone", "Offset in seconds from UTC", getenv("timezone"));
printit("router", "A list of routers", getenv("router"));
printit("timesvr", "A list of time servers", getenv("timesvr"));
printit("namesvr", "A list of IEN 116 name servers", getenv("namesvr"));
printit("dns", "A list of DNS server", getenv("dns"));
printit("logsvr", "A list of MIT-LCS UDP log servers", getenv("logsvr"));
printit("cookiesvr", "A list of RFC 865 cookie servers", getenv("cookiesvr"));
printit("lprsvr", "A list of LPR servers", getenv("lprsvr"));
printit("hostname", "The assigned hostname", getenv("hostname"));
printit("bootsize", "The length in 512 octect blocks of the bootfile", getenv("bootsize"));
printit("domain", "The domain name of the network", getenv("domain"));
printit("swapsvr", "The IP address of the client's swap server", getenv("swapsvr"));
printit("rootpath", "The path name of the client's root disk", getenv("rootpath"));
printit("ipttl", "The TTL to use for this network", getenv("ipttl"));
printit("mtu", "The MTU to use for this network", getenv("mtu"));
printit("broadcast", "The broadcast address for this network", getenv("broadcast"));
printit("ntpsrv", "A list of NTP servers", getenv("ntpsrv"));
printit("wins", "A list of WINS servers", getenv("wins"));
printit("lease", "The lease time, in seconds", getenv("lease"));
printit("dhcptype", "DHCP message type (safely ignored)", getenv("dhcptype"));
printit("serverid", "The IP of the server", getenv("serverid"));
printit("message", "Reason for a DHCPNAK", getenv("message"));
printit("tftp", "The TFTP server name", getenv("tftp"));
printit("bootfile", "The bootfile name", getenv("bootfile"));
#endif
if (!*argv)
bb_printf("Error: should be called from udhcpc\n");
else
{
char *interface = getenv("interface");
if (strcmp(*argv, "deconfig") == 0)
{
#ifdef CONFIG_FEATURE_IFUPDOWN_IP
doit(QUIET, "ip route flush dev %s", interface);
doit(QUIET, "ip addr flush dev %s", interface);
doit(QUIET, "ip link set %s up", interface);
#else
errno = 0;
while (errno == 0)
doit(QUIET, "route del default gw 0.0.0.0 dev %s", interface);
doit(QUIET, "ifconfig %s 0.0.0.0", interface);
#endif
}
else if (strcmp(*argv, "nak") == 0)
bb_printf("udhcpc received a NAK: %s\n", getenv("message"));
else if ((strcmp(*argv, "bound") == 0) || (strcmp(*argv, "renew") == 0))
{
const char *RESOLV_CONF = "/etc/resolv.conf";
char *broadcast = getenv("broadcast");
char *subnet = getenv("subnet");
char *mask = getenv("mask");
char *ip = getenv("ip");
char *hostname = getenv("hostname");
char *domain = getenv("domain");
char *router = getenv("router");
char *dns = getenv("dns");
char *siaddr = getenv("siaddr");
char *tftp = getenv("tftp");
char *BROADCAST = "";
char *NETMASK = "";
char *MASK = "";
char *HOSTNAME = 0;
int i, metric = 0;
char *token;
char *strtok_temp;
if (broadcast != 0)
bb_xasprintf(&BROADCAST, "broadcast %s", broadcast);
if (subnet != 0)
bb_xasprintf(&NETMASK, "netmask %s", subnet);
if (mask != 0)
bb_xasprintf(&MASK, "/%s", mask);
if (hostname != 0)
bb_xasprintf(&HOSTNAME, "/%s", hostname);
#ifdef CONFIG_FEATURE_IFUPDOWN_IP
doit(0, "ip addr add %s%s %s dev %s", ip, MASK, BROADCAST, interface);
doit(0, "ip link set %s up", interface);
#else
doit(0, "/sbin/ifconfig %s %s %s %s", interface, ip, BROADCAST, NETMASK);
#endif
if (router != 0)
{
token = strtok_r(router, " ,\t\r\n", &strtok_temp);
for (i = 0; token != NULL; i++)
{
#ifdef CONFIG_FEATURE_IFUPDOWN_IP
doit(0, "ip route add to default via %s dev %s", token, interface, metric++);
#else
doit(0, "route add default gw %s dev %s metric %d", token, interface, metric++);
#endif
token = strtok_r(NULL, " ,\t\r\n", &strtok_temp);
}
}
doit(0, "echo -n > %s", RESOLV_CONF);
if (domain != 0)
doit(0, "echo \"search %s\" > %s", domain, RESOLV_CONF);
token = strtok_r(dns, " \r\n", &strtok_temp);
for (i = 0; token != NULL; i++)
{
doit(0, "echo \"nameserver %s\" >> %s", token, RESOLV_CONF);
token = strtok_r(NULL, " \r\n", &strtok_temp);
}
if (HOSTNAME == 0)
{
bb_xasprintf(&HOSTNAME, doit(REDIR, "nslookup %s | grep -v default | grep Name | cut -d\":\" -f2 | tr -d ' ' | tail -n 1", ip));
if ((HOSTNAME == 0) && (stat("/var/lib/my_linux/config/hostname", &path_stat) == 0))
HOSTNAME = quick_read("/var/lib/my_linux/config/hostname");
if (HOSTNAME == 0)
HOSTNAME = "my_linux";
}
doit(0, "hostname %s", HOSTNAME);
// Should remove old entry
doit(0, "echo \"%s %s\" >> /etc/hosts", ip, HOSTNAME);
// Should dump these in a per interface file
if (siaddr != NULL)
quick_write("/var/lib/network/nfsaddr", siaddr);
if (tftp != NULL)
quick_write("/var/lib/network/tftpaddr", tftp);
/* This is what the network init script is waiting for. */
quick_write("/var/lib/network/ipaddr", ip);
bb_printf("IP %s HOSTNAME %s\n", ip, HOSTNAME);
free(HOSTNAME);
}
else
{
bb_printf("Huh?\n");
}
}
return EXIT_SUCCESS;
}
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