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udhcpc.c
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udhcpc.c
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/*
* udhcpc scripts
*
* Copyright (C) 2009, Broadcom Corporation. All Rights Reserved.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $Id: udhcpc.c,v 1.27 2009/12/02 20:06:40 Exp $
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <net/ethernet.h>
#include <asm/byteorder.h>
#include <bcmnvram.h>
#include <shutils.h>
#include <rc.h>
#ifdef RTCONFIG_AMAS
#include <amas-utils.h>
#endif
/* Support for Domain Search List */
#undef DHCP_RFC3397
#ifdef RTCONFIG_SOFTWIRE46
extern char **environ;
#endif
/* returns: length of hex value
* dest size must be lagre enough to accept n bytes from
src in hex representation plus one \0 byte */
static int
bin2hex(char *dest, size_t size, const void *src, size_t n)
{
unsigned char *sptr = (unsigned char *) src;
unsigned char *send = sptr + n;
char *dptr = dest;
while (sptr < send && size > 2) {
n = snprintf(dptr, size, "%02x", *sptr++);
dptr += n;
size -= n;
}
return dptr - dest;
}
#if defined(RTCONFIG_TR069) || (defined(RTCONFIG_AMAS) && defined(RTCONFIG_PRELINK))
/* returns:
* NULL on NULL value or alloc error
* binary representation of hex value on success
* if size if specified, returns actual size of parsed value
* note: value is alloced and needs to be free() */
static char *
hex2bin(const char *value, size_t *size)
{
char buf[3], *src, *tmp;
unsigned char *dst, *ptr;
if (!(src = (char *) value) ||
!(dst = calloc(1, strlen(src)/2 + 1)))
return NULL;
memset(buf, 0, sizeof(buf));
for (ptr = dst; src[0] && src[1]; ptr++) {
buf[0] = *src++;
buf[1] = *src++;
*ptr = strtoul(buf, &tmp, 16);
if (tmp == buf || *tmp)
break;
}
if (size)
*size = ptr - dst;
return (char *) dst;
}
#endif
/* safely check nvram value
* returns:
* 0 if not equal
* 1 if equal */
static int
nvram_check(const char *name, const char *value)
{
char *nvalue = nvram_get(name);
return (nvalue == value || strcmp(nvalue ? : "", value ? : "") == 0);
}
/* set nvram to value
* returns:
* 0 if not changed
* 1 if new/changed/removed */
static int
nvram_set_check(const char *name, const char *value)
{
if (nvram_check(name, value))
return 0;
nvram_set(name, value);
return 1;
}
/* set nvram to env value
* returns:
* 0 if not changed
* 1 if new/changed/removed */
static int
nvram_set_env(const char *name, const char *env)
{
char *evalue = getenv(env);
if (evalue)
evalue = trim_r(evalue);
return nvram_set_check(name, evalue ? : "");
}
struct viopt_hdr {
unsigned int entnum;
unsigned char len;
unsigned char data[0];
} __attribute__ ((__packed__));
struct opt_hdr {
unsigned char id;
unsigned char len;
unsigned char data[0];
} __attribute__ ((__packed__));
#if defined(RTCONFIG_TR069) || (defined(RTCONFIG_AMAS) && defined(RTCONFIG_PRELINK))
#if defined(RTCONFIG_TR181) || (defined(RTCONFIG_AMAS) && defined(RTCONFIG_PRELINK))
static struct viopt_hdr *
viopt_get(const void *buf, size_t size, unsigned int entnum)
{
struct viopt_hdr *opt;
unsigned char *ptr = (unsigned char *) buf;
unsigned char *end = (unsigned char *) buf + size;
while (ptr + sizeof(*opt) <= end) {
opt = (struct viopt_hdr *) ptr;
if ((ptr += sizeof(*opt) + opt->len) > end)
break;
if (opt->entnum == entnum)
return opt;
}
return NULL;
}
#endif
static struct opt_hdr *
opt_get(const void *buf, size_t size, unsigned char id)
{
struct opt_hdr *opt;
unsigned char *ptr = (unsigned char *) buf;
unsigned char *end = (unsigned char *) buf + size;
while (ptr + sizeof(*opt) <= end) {
opt = (struct opt_hdr *) ptr;
if (opt->id == 0) {
ptr++;
continue;
} else if (opt->id == 255)
break;
if ((ptr += sizeof(*opt) + opt->len) > end)
break;
if (opt->id == id)
return opt;
}
return NULL;
}
#ifdef RTCONFIG_TR069
static char
*stropt(const struct opt_hdr *opt, char *buf)
{
*stpncpy(buf, (char *)opt->data, opt->len) = '\0';
return buf;
}
#if defined(RTCONFIG_TR181) || defined(RTCONFIG_DSL)
static int
opt_add(const void *buf, size_t size, unsigned char id, void *data, unsigned char len)
{
struct opt_hdr *opt = (struct opt_hdr *) buf;
if (size >= sizeof(*opt) + len) {
opt->id = id;
opt->len = len;
memcpy(opt->data, data, len);
return sizeof(*opt) + len;
}
return 0;
}
#endif
#endif
#endif
struct duid {
uint16_t type;
uint16_t hwtype;
unsigned char ea[ETHER_ADDR_LEN];
} __attribute__ ((__packed__));
/* Generate DUID-LL */
static int get_duid(struct duid *duid)
{
/* Use device default MAC */
if (!duid || !ether_atoe(get_label_mac(), duid->ea))
return 0;
duid->type = htons(3); /* DUID-LL */
duid->hwtype = htons(1); /* Ethernet */
return ETHER_ADDR_LEN;
}
static int
expires(char *wan_ifname, unsigned int in)
{
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
int unit;
time_t now;
FILE *fp;
if ((unit = wan_prefix(wan_ifname, prefix)) < 0)
return -1;
if (wan_ifunit(wan_ifname) < 0)
snprintf(prefix, sizeof(prefix), "wan%d_x", unit);
nvram_set_int(strcat_r(prefix, "expires", tmp), (unsigned int) uptime() + in);
snprintf(tmp, sizeof(tmp), "/tmp/udhcpc%d.expires", unit);
if ((fp = fopen(tmp, "w")) == NULL) {
perror(tmp);
return errno;
}
time(&now);
fprintf(fp, "%d", (unsigned int) now + in);
fclose(fp);
return 0;
}
/*
* deconfig: This argument is used when udhcpc starts, and when a
* leases is lost. The script should put the interface in an up, but
* deconfigured state.
*/
static int
deconfig(int zcip)
{
char *wan_ifname = safe_getenv("interface");
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
int unit = wan_ifunit(wan_ifname);
int end_wan_sbstate = WAN_STOPPED_REASON_DHCP_DECONFIG;
/* Figure out nvram variable name prefix for this i/f */
if (wan_prefix(wan_ifname, prefix) < 0)
return -1;
if ((unit < 0) &&
(nvram_match(strcat_r(prefix, "proto", tmp), "l2tp") ||
nvram_match(strcat_r(prefix, "proto", tmp), "pptp"))) {
logmessage(zcip ? "zcip client" : "dhcp client", "skipping resetting IP address to 0.0.0.0");
} else
ifconfig(wan_ifname, IFUP, "0.0.0.0", NULL);
expires(wan_ifname, 0);
wan_down(wan_ifname);
#if defined(RTCONFIG_JFFS2) || defined(RTCONFIG_BRCM_NAND_JFFS2) || defined(RTCONFIG_UBIFS)
if (get_wan_sbstate(unit) == WAN_STOPPED_REASON_DATALIMIT)
end_wan_sbstate = WAN_STOPPED_REASON_DATALIMIT;
#endif
/* Skip physical VPN subinterface */
if (!(unit < 0))
update_wan_state(prefix, WAN_STATE_STOPPED, end_wan_sbstate);
_dprintf("udhcpc:: %s done\n", __FUNCTION__);
return 0;
}
/*
* bound: This argument is used when udhcpc moves from an unbound, to
* a bound state. All of the paramaters are set in enviromental
* variables, The script should configure the interface, and set any
* other relavent parameters (default gateway, dns server, etc).
*/
static int
bound(int renew)
{
char *wan_ifname = safe_getenv("interface");
char *value;
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
char wanprefix[sizeof("wanXXXXXXXXXX_")];
int unit, ifunit;
int changed = 0;
#if defined(RTCONFIG_PORT_BASED_VLAN) || defined(RTCONFIG_TAGGED_BASED_VLAN)
char ip_mask[sizeof("192.168.100.200/255.255.255.255XXX")];
#endif
#if defined(RTCONFIG_TR069) || (defined(RTCONFIG_AMAS) && defined(RTCONFIG_PRELINK))
size_t size = 0;
#endif
#if defined(RTCONFIG_USB_MODEM) && defined(RTCONFIG_INTERNAL_GOBI)
int modem_unit;
char tmp2[100], prefix2[32];
#endif
#ifdef RTCONFIG_AUTO_WANPORT
char lan_ifname[16], lan_ip[16], lan_net[16];
char autowan_detected_ifname[8];
char gateway[16], gateway_mac[32];
int br_no;
char if_name[16];
if(is_auto_wanport_enabled() > 0){
strlcpy(autowan_detected_ifname, nvram_safe_get("autowan_detected_ifname"), sizeof(autowan_detected_ifname));
if(strcmp(autowan_detected_ifname, "") && strcmp(autowan_detected_ifname, wan_ifname)){
_dprintf("%s(%lu): auto_wanport: Had detected the WAN interface. skip bounding of %s.\n", __func__, getpid(), wan_ifname);
return -1;
}
// start_wan() will run faster than wanduck, so getting DHCP IP is in front of the PPPoE detect possiably
// Need to do the PPPoE detect once if the WAN port is not set
if(!strcmp(autowan_detected_ifname, "")){
strlcpy(gateway, getenv("router"), sizeof(gateway));
strlcpy(lan_ifname, nvram_safe_get("lan_ifname"), sizeof(lan_ifname));
strlcpy(lan_ip, nvram_safe_get("lan_ipaddr"), sizeof(lan_ip));
strlcpy(lan_net, nvram_safe_get("lan_netmask"), sizeof(lan_net));
_dprintf("%s(%lu): auto_wanport: Get gateway %s & apply to %s first.\n", __func__, getpid(), gateway, lan_ifname);
ifconfig(lan_ifname, IFUP, "0.0.0.0", NULL);
ifconfig(lan_ifname, IFUP, getenv("ip"), getenv("subnet"));
_dprintf("%s(%lu): auto_wanport: send a ping to gateway for ARP.\n", __func__, getpid());
eval("ping", "-W1", "-c1", gateway);
memset(gateway_mac, 0, sizeof(gateway_mac));
get_mac_from_ip(gateway, gateway_mac, sizeof(gateway_mac));
if(!gateway_mac[0]){
_dprintf("%s(%lu): auto_wanport: Fail to get gateway_mac & restore the LAN IP of router.\n", __func__, getpid());
ifconfig(lan_ifname, IFUP, "0.0.0.0", NULL);
ifconfig(lan_ifname, IFUP, lan_ip, lan_net);
return -1;
}
_dprintf("%s(%lu): auto_wanport: Got gateway's MAC %s.\n", __func__, getpid(), gateway_mac);
br_no = get_br_port_no_from_mac(gateway_mac);
if(br_no < 0){
_dprintf("%s(%lu): auto_wanport: Canot get gateway's br_no.\n", __func__, getpid());
ifconfig(lan_ifname, IFUP, "0.0.0.0", NULL);
ifconfig(lan_ifname, IFUP, lan_ip, lan_net);
return -1;
}
_dprintf("%s(%lu): auto_wanport: Got gateway's br_no %d.\n", __func__, getpid(), br_no);
get_if_from_br_port_no(br_no, if_name, sizeof(if_name));
_dprintf("%s(%lu): auto_wanport: Got gateway's if %s.\n", __func__, getpid(), if_name);
wan_ifname = if_name;
_dprintf("%s(%lu): auto_wanport: restore the LAN IP of router.\n", __func__, getpid());
ifconfig(lan_ifname, IFUP, "0.0.0.0", NULL);
ifconfig(lan_ifname, IFUP, lan_ip, lan_net);
_dprintf("%s(%lu): auto_wanport: Choose the WAN interface %s because of DHCP.\n", __func__, getpid(), wan_ifname);
set_auto_wanport(wan_ifname, 1);
return -1;
}
ifunit = nvram_get_int("autowan_live_wanunit");
snprintf(wanprefix, sizeof(wanprefix), "wan%d_", ifunit);
}
else
#endif
/* Figure out nvram variable name prefix for this i/f */
if ((ifunit = wan_prefix(wan_ifname, wanprefix)) < 0)
return -1;
if ((unit = wan_ifunit(wan_ifname)) < 0
#ifdef RTCONFIG_SOFTWIRE46
|| nvram_pf_get_int(wanprefix, "s46_hgw_case") == S46_CASE_MAP_HGW_OFF
#endif
)
snprintf(prefix, sizeof(prefix), "wan%d_x", ifunit);
else
snprintf(prefix, sizeof(prefix), "wan%d_", ifunit);
snprintf(tmp, sizeof(tmp), "/tmp/%sbound.env", prefix);
envsave(tmp);
/* Stop zcip to avoid races */
stop_zcip(ifunit);
changed += nvram_set_env(strcat_r(prefix, "ipaddr", tmp), "ip");
#if defined(RTCONFIG_USB_MODEM) && defined(RTCONFIG_INTERNAL_GOBI)
if (dualwan_unit__usbif(ifunit)) {
modem_unit = get_modemunit_by_dev(wan_ifname);
if (modem_unit == MODEM_UNIT_NONE) {
_dprintf("%s: cannot get the modem unit!\n", __FUNCTION__);
return -1;
}
usb_modem_prefix(modem_unit, prefix2, sizeof(prefix2));
}
if (dualwan_unit__usbif(ifunit) && nvram_match(strcat_r(prefix2, "act_type", tmp2), "gobi")) {
changed += nvram_set_check(strcat_r(prefix, "netmask", tmp), "255.255.255.255");
changed += nvram_set_env(strcat_r(prefix, "gateway", tmp), "ip");
} else
#endif
{
changed += nvram_set_env(strcat_r(prefix, "netmask", tmp), "subnet");
changed += nvram_set_env(strcat_r(prefix, "gateway", tmp), "router");
}
// always backup received dns
if ((value = getenv("dns") ? : getenv("router")))
nvram_set(strlcat_r(prefix, "dns_r", tmp, sizeof(tmp)), trim_r(value));
if (nvram_get_int(strcat_r(wanprefix, "dnsenable_x", tmp))) {
/* ex: android phone, the gateway is the DNS server. */
if ((value = getenv("dns") ? : getenv("router")))
nvram_set(strcat_r(prefix, "dns", tmp), trim_r(value));
#ifdef DHCP_RFC3397
if ((value = getenv("search")) && *value) {
char *domain, *result;
if ((domain = getenv("domain")) && *domain &&
find_word(value, trim_r(domain)) == NULL) {
result = alloca(strlen(domain) + strlen(value) + 2);
sprintf(result, "%s %s", domain, value);
value = result;
}
nvram_set(strcat_r(prefix, "domain", tmp), trim_r(value));
} else
#endif
nvram_set_env(strcat_r(prefix, "domain", tmp), "domain");
}
if ((value = getenv("wins")))
nvram_set(strcat_r(prefix, "wins", tmp), trim_r(value));
//if ((value = getenv("hostname")))
// sethostname(value, strlen(value) + 1);
if ((value = getenv("lease"))) {
unsigned int lease = atoi(value);
nvram_set_int(strcat_r(prefix, "lease", tmp), lease);
expires(wan_ifname, lease);
}
/* classful static routes */
nvram_set(strcat_r(prefix, "routes", tmp), getenv("routes"));
/* ms classless static routes */
nvram_set(strcat_r(prefix, "routes_ms", tmp), getenv("msstaticroutes"));
/* rfc3442 classless static routes */
nvram_set(strcat_r(prefix, "routes_rfc", tmp), getenv("staticroutes"));
#ifdef RTCONFIG_IPV6
if ((value = getenv("ip6rd")) &&
(get_ipv6_service_by_unit(ifunit) == IPV6_6RD && nvram_match(ipv6_nvname_by_unit("ipv6_6rd_dhcp", ifunit), "1"))) {
char *ptr, *pvalue, *values[4];
int i;
ptr = pvalue = strdup(value);
for (i = 0; pvalue && i < 4; i++)
values[i] = strsep(&pvalue, " ");
if (i == 4) {
nvram_set(strcat_r(wanprefix, "6rd_ip4size", tmp), values[0]);
nvram_set(strcat_r(wanprefix, "6rd_prefixlen", tmp), values[1]);
nvram_set(strcat_r(wanprefix, "6rd_prefix", tmp), values[2]);
nvram_set(strcat_r(wanprefix, "6rd_router", tmp), values[3]);
}
free(ptr);
}
#endif
#ifdef RTCONFIG_TR069
if ((value = getenv("opt43")) && nvram_get_int("tr_discovery") &&
(value = hex2bin(value, &size))) {
struct opt_hdr *opt;
char buf[256], *url = NULL, *userinfo, *host, *path, *ptr, *user, *pass;
if ((opt = opt_get(value, size, 1)) &&
(ptr = strstr(stropt(opt, buf), "://")) && ptr > buf)
url = trim_r(buf);
else if ((ptr = strstr(value, "://")) && ptr > value)
url = trim_r(value);
if (url && (
strncmp(url, "http://", sizeof("http://") - 1) == 0 ||
strncmp(url, "https://", sizeof("https://") - 1) == 0)) {
host = strtok_r(ptr + 3, " ", &userinfo);
path = strchrnul(host, '/');
if ((ptr = strchr(host, '@')) && ptr < path) {
ptr = strsep(&host, "@");
if ((userinfo = user = pass = strdup(ptr)))
strsep(&pass, ":");
url = memmove(host - (ptr - url), url, ptr - url);
} else {
user = strtok_r(NULL, " ", &userinfo);
pass = strtok_r(NULL, " ", &userinfo);
userinfo = NULL;
}
if (host < path) {
if (user || pass) {
//nvram_set(strcat_r(wanprefix, "tr_username", tmp), user ? : "");
//nvram_set(strcat_r(wanprefix, "tr_passwd", tmp), pass ? : "");
nvram_set("tr_username", user ? : "");
nvram_set("tr_passwd", pass ? : "");
}
//nvram_set(strcat_r(wanprefix, "tr_acs_url", tmp), url);
nvram_set("tr_acs_url", url);
nvram_set_int("tr_enable", 1);
}
free(userinfo);
}
if ((opt = opt_get(value, size, 2))) {
//nvram_set(strcat_r(wanprefix, "tr_pvgcode", tmp), stropt(opt, buf));
nvram_set("pvgcode", stropt(opt, buf));
}
free(value);
}
#ifdef RTCONFIG_TR181
nvram_unset("vivso");
if ((value = hex2bin(getenv("opt125"), &size))) {
struct viopt_hdr *viopt;
struct opt_hdr *oui, *serial, *class;
if ((viopt = viopt_get(value, size, htonl(3561))) &&
(oui = opt_get(viopt->data, viopt->len, 4)) &&
(serial = opt_get(viopt->data, viopt->len, 5))) {
char vivso[6 + 64 + 64 + 3];
char *ptr = vivso;
char *end = ptr + sizeof(vivso);
ptr += snprintf(ptr, end - ptr, "%s,", stropt(oui, tmp));
ptr += snprintf(ptr, end - ptr, "%s,", stropt(serial, tmp));
if ((class = opt_get(viopt->data, viopt->len, 6)))
ptr += snprintf(ptr, end - ptr, "%s", stropt(class, tmp));
nvram_set("vivso", vivso);
}
free(value);
}
#endif
#endif
#if defined(RTCONFIG_AMAS) && defined(RTCONFIG_PRELINK)
if (nvram_match("x_Setting", "0")) {
int verified = 0;
if ((value = hex2bin(getenv("opt125"), &size))) {
struct viopt_hdr *viopt;
struct opt_hdr *hash_bundle_key_opt;
if ((viopt = viopt_get(value, size, htonl(2623))) &&
(hash_bundle_key_opt = opt_get(viopt->data, viopt->len, 123)) && hash_bundle_key_opt->len == 20) {
verified = amas_verify_hash_bundle_key(hash_bundle_key_opt->data, &verified) == AMAS_RESULT_SUCCESS &&
verified == 1;
}
free(value);
}
nvram_set("amas_bdl_wanstate", verified ? "1" : "2");
#if defined(RTCONFIG_BT_CONN)
ble_rename_ssid();
#endif
}
#endif
// check if the ipaddr is safe to apply
// only handle one lan instance so far
// update_wan_state(prefix, WAN_STATE_STOPPED, WAN_STOPPED_REASON_INVALID_IPADDR)
if (inet_equal(nvram_safe_get(strcat_r(prefix, "ipaddr", tmp)), nvram_safe_get(strcat_r(prefix, "netmask", tmp)),
nvram_safe_get("lan_ipaddr"), nvram_safe_get("lan_netmask"))) {
update_wan_state(prefix, WAN_STATE_STOPPED, WAN_STOPPED_REASON_INVALID_IPADDR);
return 0;
}
#if defined(RTCONFIG_PORT_BASED_VLAN) || defined(RTCONFIG_TAGGED_BASED_VLAN)
/* If return value of test_and_get_free_char_network() is 1 and
* we got different IP/netmask from it, the WAN IP/netmask conflicts with known networks.
*/
snprintf(ip_mask, sizeof(ip_mask), "%s/%s",
nvram_pf_safe_get(prefix, "ipaddr"), nvram_pf_safe_get(prefix, "netmask"));
if (test_and_get_free_char_network(7, ip_mask, EXCLUDE_NET_ALL_EXCEPT_LAN_VLAN) == 1) {
logmessage("dhcp", "%s/%s conflicts with known networks",
nvram_pf_safe_get(prefix, "ipaddr"), nvram_pf_safe_get(prefix, "netmask"));
update_wan_state(prefix, WAN_STATE_STOPPED, WAN_STOPPED_REASON_INVALID_IPADDR);
return 0;
}
#endif
#if defined(RTCONFIG_COOVACHILLI)
restart_coovachilli_if_conflicts(nvram_pf_get(prefix, "ipaddr"), nvram_pf_get(prefix, "netmask"));
#endif
/* Clean nat conntrack for this interface,
* but skip physical VPN subinterface for PPTP/L2TP */
if (changed && !(unit < 0 &&
(nvram_match(strcat_r(wanprefix, "proto", tmp), "l2tp") ||
nvram_match(strcat_r(wanprefix, "proto", tmp), "pptp"))))
ifconfig(wan_ifname, IFUP, "0.0.0.0", NULL);
ifconfig(wan_ifname, IFUP,
nvram_safe_get(strcat_r(prefix, "ipaddr", tmp)),
nvram_safe_get(strcat_r(prefix, "netmask", tmp)));
#ifdef RTCONFIG_ISP_CUSTOMIZE_TOOL
if ((value = getenv("tftp"))) {
customize_tool(value);
}
#endif
wan_up(wan_ifname);
logmessage("dhcp client", "%s %s/%s via %s for %d seconds.",
renew ? "renew" : "bound",
nvram_safe_get(strcat_r(prefix, "ipaddr", tmp)),
nvram_safe_get(strcat_r(prefix, "netmask", tmp)),
nvram_safe_get(strcat_r(prefix, "gateway", tmp)),
nvram_get_int(strcat_r(prefix, "lease", tmp)));
_dprintf("udhcpc:: %s done\n", __FUNCTION__);
return 0;
}
/*
* renew: This argument is used when a DHCP lease is renewed. All of
* the paramaters are set in enviromental variables. This argument is
* used when the interface is already configured, so the IP address,
* will not change, however, the other DHCP paramaters, such as the
* default gateway, subnet mask, and dns server may change.
*/
static int
renew(void)
{
char *wan_ifname = safe_getenv("interface");
char *value;
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
char wanprefix[sizeof("wanXXXXXXXXXX_")];
int unit, ifunit;
int changed = 0;
#if defined(RTCONFIG_USB_MODEM) && defined(RTCONFIG_INTERNAL_GOBI)
int modem_unit;
char tmp2[100], prefix2[32];
#endif
/* Figure out nvram variable name prefix for this i/f */
if ((ifunit = wan_prefix(wan_ifname, wanprefix)) < 0)
return -1;
if ((unit = wan_ifunit(wan_ifname)) < 0)
snprintf(prefix, sizeof(prefix), "wan%d_x", ifunit);
else
snprintf(prefix, sizeof(prefix), "wan%d_", ifunit);
if (!nvram_check(strcat_r(prefix, "ipaddr", tmp), trim_r(getenv("ip"))))
return bound(1);
#if defined(RTCONFIG_USB_MODEM) && defined(RTCONFIG_INTERNAL_GOBI)
if (dualwan_unit__usbif(ifunit)) {
modem_unit = get_modemunit_by_dev(wan_ifname);
if (modem_unit == MODEM_UNIT_NONE) {
_dprintf("%s: cannot get the modem unit!\n", __FUNCTION__);
return -1;
}
usb_modem_prefix(modem_unit, prefix2, sizeof(prefix2));
}
if (dualwan_unit__usbif(ifunit) && nvram_match(strcat_r(prefix2, "act_type", tmp2), "gobi")) {
if (!nvram_check(strcat_r(prefix, "netmask", tmp), "255.255.255.255"))
return bound(1);
if (!nvram_check(strcat_r(prefix, "gateway", tmp), trim_r(getenv("ip"))))
return bound(1);
} else
#endif
{
if (!nvram_check(strcat_r(prefix, "netmask", tmp), trim_r(getenv("subnet"))))
return bound(1);
if (!nvram_check(strcat_r(prefix, "gateway", tmp), trim_r(getenv("router"))))
return bound(1);
}
if (nvram_get_int(strcat_r(wanprefix, "dnsenable_x", tmp))) {
/* ex: android phone, the gateway is the DNS server. */
if ((value = getenv("dns") ? : getenv("router")))
changed += nvram_set_check(strcat_r(prefix, "dns", tmp), trim_r(value));
#ifdef DHCP_RFC3397
if ((value = getenv("search")) && *value) {
char *domain, *result;
if ((domain = getenv("domain")) && *domain &&
find_word(value, trim_r(domain)) == NULL) {
result = alloca(strlen(domain) + strlen(value) + 2);
sprintf(result, "%s %s", domain, value);
value = result;
}
changed += nvram_set_check(strcat_r(prefix, "domain", tmp), trim_r(value));
} else
#endif
changed += nvram_set_env(strcat_r(prefix, "domain", tmp), "domain");
}
if ((value = getenv("wins")))
nvram_set(strcat_r(prefix, "wins", tmp), trim_r(value));
//if ((value = getenv("hostname")))
// sethostname(value, strlen(value) + 1);
if ((value = getenv("lease"))) {
unsigned int lease = atoi(value);
nvram_set_int(strcat_r(prefix, "lease", tmp), lease);
expires(wan_ifname, lease);
}
/* Update actual DNS or delayed for DHCP+PPP */
if (changed)
update_resolvconf();
/* Update connected state and DNS for WEB UI,
* but skip physical VPN subinterface */
if (changed && !(unit < 0))
update_wan_state(wanprefix, WAN_STATE_CONNECTED, 0);
_dprintf("udhcpc:: %s done\n", __FUNCTION__);
return 0;
}
static int
leasefail(void)
{
char *wan_ifname = safe_getenv("interface");
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
char pid[sizeof("/var/run/zcipXXXXXXXXXX.pid")];
int unit;
/* Figure out nvram variable name prefix for this i/f */
if ((unit = wan_prefix(wan_ifname, prefix)) < 0)
return -1;
/* Start zcip for pppoe only */
if (!nvram_match(strcat_r(prefix, "proto", tmp), "pppoe"))
return 0;
snprintf(pid, sizeof(pid), "/var/run/zcip%d.pid", unit);
if (kill_pidfile_s(pid, 0) == 0)
return 0;
return start_zcip(wan_ifname, unit, NULL);
}
int
udhcpc_wan(int argc, char **argv)
{
run_custom_script("dhcpc-event", 0, argv[1], "4");
if(argv[1] && !strstr(argv[1], "leasefail"))
_dprintf("%s:: %s\n", __func__, argv[1]);
if (!argv[1]){
_dprintf("%s::\n", __func__);
return EINVAL;
}
else if (strstr(argv[1], "deconfig"))
return deconfig(0);
else if (strstr(argv[1], "bound"))
return bound(0);
else if (strstr(argv[1], "renew"))
return renew();
else if (strstr(argv[1], "leasefail"))
return leasefail();
/* else if (strstr(argv[1], "nak")) */
return 0;
}
int
start_udhcpc(char *wan_ifname, int unit, pid_t *ppid)
{
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
char pid[sizeof("/var/run/udhcpcXXXXXXXXXX.pid")];
char clientid[sizeof("61:") + (128*2) + 1];
#ifdef RTCONFIG_TR069
char vendorid[32+32+sizeof(" dslforum.org")];
#if defined(RTCONFIG_TR181) || defined(RTCONFIG_DSL)
unsigned char optbuf[sizeof(struct viopt_hdr) + 128];
unsigned char hwaddr[6];
char vivopts[sizeof("125:") + sizeof(optbuf)*2];
#endif
#endif
struct duid duid;
char *value;
char *dhcp_argv[] = { "/sbin/udhcpc",
"-i", wan_ifname,
"-p", (snprintf(pid, sizeof(pid), "/var/run/udhcpc%d.pid", unit), pid),
"-s", "/tmp/udhcpc_wan",
NULL, /* -t2 */
NULL, /* -T5 */
NULL, /* -A120 */
NULL, /* -b */
NULL, NULL, /* -H/-F wan_hostname */
NULL, /* -Oroutes */
NULL, /* -Ostaticroutes */
NULL, /* -Omsstaticroutes */
#ifdef RTCONFIG_IPV6
NULL, /* -Oip6rd rfc */
NULL, /* -Oip6rd comcast */
#endif
NULL, NULL, /* -x 61:wan_clientid */
NULL, NULL, /* -V wan_vendorid */
#ifdef RTCONFIG_TR069
NULL, /* -O43 */
#if defined(RTCONFIG_TR181) || defined(RTCONFIG_DSL)
NULL, NULL, /* -x 125:vivopts */
#endif
#endif
NULL, NULL, /* -x 61:wan_clientid (non-DSL) */
NULL };
int index = 7; /* first NULL */
int len, dr_enable;
int dhcp_qry;
/* Use unit */
snprintf(prefix, sizeof(prefix), "wan%d_", unit);
/* Stop zcip to avoid races */
stop_zcip(unit);
/* Skip dhcp and start zcip for pppoe, if desired */
if ((nvram_match(strcat_r(prefix, "proto", tmp), "pppoe") &&
nvram_match(strcat_r(prefix, "vpndhcp", tmp), "0"))
#if defined(RTCONFIG_IPV6) && (defined(RTAX82_XD6) || defined(RTAX82_XD6S) || defined(XD6_V2) || defined(ET12))
|| (!strncmp(nvram_safe_get("territory_code"), "CH", 2) &&
ipv6_enabled() && nvram_match(ipv6_nvname("ipv6_only"), "1"))
#endif
)
return start_zcip(wan_ifname, unit, ppid);
/* DHCP query frequency */
value = nvram_get(strcat_r(prefix, "dhcp_qry", tmp)); // new nvram with wan index
if (value && strlen(value))
dhcp_qry = atoi(value);
else
dhcp_qry = nvram_get_int("dhcpc_mode"); // default = Aggressive mode
if (dhcp_qry == 0) { // Normal mode
/* 2 discover packets max (default 3 discover packets) */
dhcp_argv[index++] = "-t2";
/* 5 seconds between packets (default 3 seconds) */
dhcp_argv[index++] = "-T5";
/* Wait 160 seconds before trying again (default 20 seconds) */
/* set to 160 to accomodate new timings enforced by Charter cable */
dhcp_argv[index++] = "-A160";
} else if(dhcp_qry == 1){ // Aggressive mode
dhcp_argv[index++] = "-A5";
} else if(dhcp_qry == 2){ // Continuous mode
dhcp_argv[index++] = "-t1";
dhcp_argv[index++] = "-T5";
dhcp_argv[index++] = "-A0";
}
if (ppid == NULL)
dhcp_argv[index++] = "-b";
value = nvram_safe_get(strcat_r(prefix, "hostname", tmp));
if (*value) {
char *fqdn = strchr(value, '.');
if (fqdn ? is_valid_domainname(value) : is_valid_hostname(value)) {
dhcp_argv[index++] = fqdn ? "-F" : "-H";
dhcp_argv[index++] = value;
}
}
/* 0: disable, 1: MS routes, 2: RFC routes, 3: Both */
dr_enable = nvram_get_int("dr_enable_x");
if (dr_enable != 0) {
dhcp_argv[index++] = "-O33"; /* routes */
if (dr_enable & (1 << 0))
dhcp_argv[index++] = "-O249"; /* "msstaticroutes" */
if (dr_enable & (1 << 1))
dhcp_argv[index++] = "-O121"; /* "staticroutes" */
}
#ifdef RTCONFIG_IPV6
if (get_ipv6_service_by_unit(unit) == IPV6_6RD && nvram_match(ipv6_nvname_by_unit("ipv6_6rd_dhcp", unit), "1")) {
dhcp_argv[index++] = "-O212"; /* ip6rd rfc */
dhcp_argv[index++] = "-O150"; /* ip6rd comcast */
}
#endif
/* Client ID */
value = nvram_safe_get(strcat_r(prefix, "clientid", tmp));
if (nvram_get_int(strcat_r(prefix, "clientid_type", tmp))) {
if (get_duid(&duid)) {
/* RFC4361 implementation, use WAN number as IAID.
* This also fits odhcp6c behavior for IA_NA for the WAN0 */
unsigned long iaid = htonl(unit + 1);
len = snprintf(clientid, sizeof(clientid), "61:ff");
len += bin2hex(clientid + len, sizeof(clientid) - len, &iaid, sizeof(iaid));
bin2hex(clientid + len, sizeof(clientid) - len, &duid, sizeof(duid));
dhcp_argv[index++] = "-x";
dhcp_argv[index++] = clientid;
}
} else if (*value) {
len = snprintf(clientid, sizeof(clientid), "61:");
bin2hex(clientid + len, sizeof(clientid) - len, value, strlen(value));
dhcp_argv[index++] = "-x";
dhcp_argv[index++] = clientid;
}
/* Vendor ID */
value = nvram_safe_get(strcat_r(prefix, "vendorid", tmp));
#ifdef RTCONFIG_TR069
if (nvram_get_int("tr_discovery")) {
/* Add dslforum.org to VCI and request VSI */
value = stpncpy(vendorid, *value ? value : "udhcp",
sizeof(vendorid) - sizeof(" dslforum.org"));
snprintf(value, sizeof(vendorid) - (value - vendorid), " %s", "dslforum.org");
value = vendorid;
dhcp_argv[index++] = "-O43";
}
#endif
if (*value) {
dhcp_argv[index++] = "-V";
dhcp_argv[index++] = value;
}
#ifdef RTCONFIG_TR069
#if defined(RTCONFIG_TR181) || defined(RTCONFIG_DSL)
if (ether_atoe(get_lan_hwaddr(), hwaddr)) {
struct viopt_hdr *viopt = (struct viopt_hdr *) optbuf;
unsigned char *ptr = viopt->data;
unsigned char *end = optbuf + sizeof(optbuf);
/* OUI */
len = snprintf(tmp, sizeof(tmp), "%02X%02X%02X", hwaddr[0], hwaddr[1], hwaddr[2]);
ptr += opt_add(ptr, end - ptr, 1, tmp, len);
/* Serial */
len = snprintf(tmp, sizeof(tmp), "%02X%02X%02X%02X%02X%02X",
hwaddr[0], hwaddr[1], hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]);
ptr += opt_add(ptr, end - ptr, 2, tmp, len);
/* Class */
len = snprintf(tmp, sizeof(tmp), "%s", nvram_safe_get("productid"));
ptr += opt_add(ptr, end - ptr, 3, tmp, len);
viopt->entnum = htonl(3561);
viopt->len = ptr - viopt->data;
len = snprintf(vivopts, sizeof(vivopts), "125:");
bin2hex(vivopts + len, sizeof(vivopts) - len, viopt, sizeof(*viopt) + viopt->len);
dhcp_argv[index++] = "-x";
dhcp_argv[index++] = vivopts;
}
#endif
#endif
return _eval(dhcp_argv, NULL, 0, ppid);
}
void
stop_udhcpc(int unit)
{
char pid[sizeof("/var/run/udhcpcXXXXXXXXXX.pid")];
/* Stop zcip before udhcpc to avoid races */
stop_zcip(unit);
/* Stop all instances */
if (unit < 0) {
killall_tk("udhcpc");
return;
}
/* Stop unit instance only */
snprintf(pid, sizeof(pid), "/var/run/udhcpc%d.pid", unit);
if (kill_pidfile_s(pid, SIGUSR2) == 0) {
usleep(10000);
kill_pidfile_tk(pid);
}
}
/*
* config: This argument is used when zcip moves to configured state.
* All of the paramaters are set in enviromental variables, the script
* should configure the interface.
*/
static int
config(void)
{
char *wan_ifname = safe_getenv("interface");
char tmp[100], prefix[sizeof("wanXXXXXXXXXX_")];
char wanprefix[sizeof("wanXXXXXXXXXX_")];
int unit, ifunit;