/**
* Release the current DHCP client lease.
*/
int dhcp_release_lease(const char *interface)
{
char daemon_prop_name[PROPERTY_KEY_MAX];
char daemon_cmd[PROPERTY_VALUE_MAX * 2];
const char *ctrl_prop = "ctl.stop";
const char *desired_status = "stopped";
char p2p_interface[MAX_INTERFACE_LENGTH];
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_%s",
DAEMON_PROP_NAME,
p2p_interface);
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s", DAEMON_NAME, p2p_interface);
pid_t pid;
char pid_property_name[PROPERTY_KEY_MAX];
char pid_property_value[PROPERTY_VALUE_MAX];
snprintf(pid_property_name, sizeof(pid_property_name), "dhcp.%s.pid", interface);
property_get(pid_property_name, pid_property_value, NULL);
pid = atoi(pid_property_value);
kill(pid, SIGHUP);
if (wait_for_property(daemon_prop_name, desired_status, 5) < 0) {
return -1;
}
return 0;
}
/**
* The device init.rc file needs a corresponding entry.
*
* Example:
* service iprenew_<interface> /system/bin/dhcpcd -n
*
*/
int dhcp_start_renew(const char *interface)
{
char result_prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX] = {'\0'};
char daemon_cmd[PROPERTY_VALUE_MAX * 2];
const char *ctrl_prop = "ctl.start";
char p2p_interface[MAX_INTERFACE_LENGTH];
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
/* Erase any previous setting of the dhcp result property */
property_set(result_prop_name, "");
/* Start the renew daemon and wait until it's ready */
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:%s", DAEMON_NAME_RENEW,
p2p_interface, interface);
memset(prop_value, '\0', PROPERTY_VALUE_MAX);
property_set(ctrl_prop, daemon_cmd);
/* Wait for the daemon to return a result */
if (wait_for_property(result_prop_name, NULL, 30) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for DHCP Renew to finish");
return -1;
}
return 0;
}
/**
* Stop the DHCP client daemon.
*/
int dhcp_stop(const char *interface)
{
char result_prop_name[PROPERTY_KEY_MAX];
char daemon_prop_name[PROPERTY_KEY_MAX];
char daemon_cmd[PROPERTY_VALUE_MAX * 2];
const char *ctrl_prop = "ctl.stop";
const char *desired_status = "stopped";
char p2p_interface[MAX_INTERFACE_LENGTH];
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_%s",
DAEMON_PROP_NAME,
p2p_interface);
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s", DAEMON_NAME, p2p_interface);
/* Stop the daemon and wait until it's reported to be stopped */
property_set(ctrl_prop, daemon_cmd);
if (wait_for_property(daemon_prop_name, desired_status, 5) < 0) {
return -1;
}
property_set(result_prop_name, "failed");
return 0;
}
/**
* The device init.rc file needs a corresponding entry.
*
* Example:
* service iprenew_<interface> /system/bin/dhcpcd -n
*
*/
int dhcp_do_request_renew(const char *interface,
char *ipaddr,
char *gateway,
uint32_t *prefixLength,
char *dns[],
char *server,
uint32_t *lease,
char *vendorInfo,
char *domain,
char *mtu)
{
char result_prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX] = {'\0'};
char daemon_cmd[PROPERTY_VALUE_MAX * 2];
const char *ctrl_prop = "ctl.start";
char p2p_interface[MAX_INTERFACE_LENGTH];
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
/* Erase any previous setting of the dhcp result property */
property_set(result_prop_name, "");
/* Start the renew daemon and wait until it's ready */
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:%s", DAEMON_NAME_RENEW,
p2p_interface, interface);
memset(prop_value, '\0', PROPERTY_VALUE_MAX);
property_set(ctrl_prop, daemon_cmd);
/* Wait for the daemon to return a result */
if (wait_for_property(result_prop_name, NULL, 30) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for DHCP Renew to finish");
return -1;
}
if (!property_get(result_prop_name, prop_value, NULL)) {
/* shouldn't ever happen, given the success of wait_for_property() */
snprintf(errmsg, sizeof(errmsg), "%s", "DHCP Renew result property was not set");
return -1;
}
if (strcmp(prop_value, "ok") == 0) {
return fill_ip_info(interface, ipaddr, gateway, prefixLength, dns,
server, lease, vendorInfo, domain, mtu);
} else {
snprintf(errmsg, sizeof(errmsg), "DHCP Renew result was %s", prop_value);
return -1;
}
}
static int fill_ip_info(const char *interface,
char *ipaddr,
char *gateway,
uint32_t *prefixLength,
char *dns[],
char *server,
uint32_t *lease,
char *vendorInfo,
char *domain,
char *mtu
#ifdef SAMSUNG_WIFI_ROAMING
,uint32_t *roaming
#endif
)
{
char prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX];
/* Interface name after converting p2p0-p2p0-X to p2p to reuse system properties */
char p2p_interface[MAX_INTERFACE_LENGTH];
int x;
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(prop_name, sizeof(prop_name), "%s.%s.ipaddress", DHCP_PROP_NAME_PREFIX, p2p_interface);
property_get(prop_name, ipaddr, NULL);
snprintf(prop_name, sizeof(prop_name), "%s.%s.gateway", DHCP_PROP_NAME_PREFIX, p2p_interface);
property_get(prop_name, gateway, NULL);
snprintf(prop_name, sizeof(prop_name), "%s.%s.server", DHCP_PROP_NAME_PREFIX, p2p_interface);
property_get(prop_name, server, NULL);
//TODO: Handle IPv6 when we change system property usage
if (gateway[0] == '\0' || strncmp(gateway, "0.0.0.0", 7) == 0) {
//DHCP server is our best bet as gateway
strncpy(gateway, server, PROPERTY_VALUE_MAX);
}
snprintf(prop_name, sizeof(prop_name), "%s.%s.mask", DHCP_PROP_NAME_PREFIX, p2p_interface);
if (property_get(prop_name, prop_value, NULL)) {
int p;
// this conversion is v4 only, but this dhcp client is v4 only anyway
in_addr_t mask = ntohl(inet_addr(prop_value));
// Check netmask is a valid IP address. ntohl gives NONE response (all 1's) for
// non 255.255.255.255 inputs. if we get that value check if it is legit..
if (mask == INADDR_NONE && strcmp(prop_value, "255.255.255.255") != 0) {
snprintf(errmsg, sizeof(errmsg), "DHCP gave invalid net mask %s", prop_value);
return -1;
}
for (p = 0; p < 32; p++) {
if (mask == 0) break;
// check for non-contiguous netmask, e.g., 255.254.255.0
if ((mask & 0x80000000) == 0) {
snprintf(errmsg, sizeof(errmsg), "DHCP gave invalid net mask %s", prop_value);
return -1;
}
mask = mask << 1;
}
*prefixLength = p;
}
for (x=0; dns[x] != NULL; x++) {
snprintf(prop_name, sizeof(prop_name), "%s.%s.dns%d", DHCP_PROP_NAME_PREFIX, p2p_interface, x+1);
property_get(prop_name, dns[x], NULL);
}
snprintf(prop_name, sizeof(prop_name), "%s.%s.leasetime", DHCP_PROP_NAME_PREFIX, p2p_interface);
if (property_get(prop_name, prop_value, NULL)) {
*lease = atol(prop_value);
}
snprintf(prop_name, sizeof(prop_name), "%s.%s.vendorInfo", DHCP_PROP_NAME_PREFIX,
p2p_interface);
property_get(prop_name, vendorInfo, NULL);
snprintf(prop_name, sizeof(prop_name), "%s.%s.domain", DHCP_PROP_NAME_PREFIX,
p2p_interface);
property_get(prop_name, domain, NULL);
snprintf(prop_name, sizeof(prop_name), "%s.%s.mtu", DHCP_PROP_NAME_PREFIX,
p2p_interface);
property_get(prop_name, mtu, NULL);
snprintf(prop_name, sizeof(prop_name), "%s.%s.roaming", DHCP_PROP_NAME_PREFIX, p2p_interface);
if (property_get(prop_name, prop_value, NULL)) {
*roaming = atol(prop_value);
}
return 0;
}
/*
* Start the dhcp client daemon, and wait for it to finish
* configuring the interface.
*
* The device init.rc file needs a corresponding entry for this work.
*
* Example:
* service dhcpcd_<interface> /system/bin/dhcpcd -ABKL -f dhcpcd.conf
*/
int dhcp_start(const char *interface)
{
char result_prop_name[PROPERTY_KEY_MAX];
char daemon_prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX] = {'\0'};
char daemon_cmd[PROPERTY_VALUE_MAX * 2 + sizeof(DHCP_CONFIG_PATH)];
const char *ctrl_prop = "ctl.start";
const char *desired_status = "running";
/* Interface name after converting p2p0-p2p0-X to p2p to reuse system properties */
char p2p_interface[MAX_INTERFACE_LENGTH];
#ifdef SAMSUNG_OXYGEN_NETWORK
int isIbss = 0;
#endif
get_p2p_interface_replacement(interface, p2p_interface);
#ifdef SAMSUNG_OXYGEN_NETWORK
isIbss = get_ibss_interface_replacement(interface, p2p_interface);
#endif
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
#ifdef SAMSUNG_OXYGEN_NETWORK
if (isIbss > 0) {
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_ibss",
DAEMON_PROP_NAME);
} else {
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_%s",
DAEMON_PROP_NAME,
p2p_interface);
}
#else
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_%s",
DAEMON_PROP_NAME,
p2p_interface);
#endif
/* Erase any previous setting of the dhcp result property */
property_set(result_prop_name, "");
/* Start the daemon and wait until it's ready */
if (property_get(HOSTNAME_PROP_NAME, prop_value, NULL) && (prop_value[0] != '\0'))
#ifdef SAMSUNG_OXYGEN_NETWORK
{
if (isIbss > 0) {
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_ibss:-f %s -h %s wlan0", DAEMON_NAME,
DHCP_CONFIG_PATH, prop_value);
} else
#endif
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-f %s -h %s %s", DAEMON_NAME,
p2p_interface, DHCP_CONFIG_PATH, prop_value, interface);
#ifdef SAMSUNG_OXYGEN_NETWORK
}
#endif
else
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-f %s %s", DAEMON_NAME,
p2p_interface, DHCP_CONFIG_PATH, interface);
memset(prop_value, '\0', PROPERTY_VALUE_MAX);
property_set(ctrl_prop, daemon_cmd);
if (wait_for_property(daemon_prop_name, desired_status, 10) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for dhcpcd to start");
return -1;
}
/* Wait for the daemon to return a result */
if (wait_for_property(result_prop_name, NULL, 30) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for DHCP to finish");
return -1;
}
return 0;
}
/*
* Get any available DHCP results.
*/
int dhcp_get_results(const char *interface,
char *ipaddr,
char *gateway,
uint32_t *prefixLength,
char *dns[],
char *server,
uint32_t *lease,
char *vendorInfo,
char *domain,
char *mtu
#ifdef SAMSUNG_WIFI_ROAMING
,uint32_t *roaming
#endif
)
{
char result_prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX];
/* Interface name after converting p2p0-p2p0-X to p2p to reuse system properties */
char p2p_interface[MAX_INTERFACE_LENGTH];
#ifdef SAMSUNG_OXYGEN_NETWORK
char result_interface[MAX_INTERFACE_LENGTH];
#endif
get_p2p_interface_replacement(interface, p2p_interface);
#ifdef SAMSUNG_OXYGEN_NETWORK
if (get_ibss_interface_replacement(interface, p2p_interface) > 0) {
strncpy(result_interface, p2p_interface, MAX_INTERFACE_LENGTH);
} else {
strncpy(result_interface, interface, MAX_INTERFACE_LENGTH);
}
#endif
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
memset(prop_value, '\0', PROPERTY_VALUE_MAX);
if (!property_get(result_prop_name, prop_value, NULL)) {
snprintf(errmsg, sizeof(errmsg), "%s", "DHCP result property was not set");
return -1;
}
if (strcmp(prop_value, "ok") == 0) {
if (fill_ip_info(
#ifdef SAMSUNG_OXYGEN_NETWORK
result_interface,
#else
interface,
#endif
ipaddr, gateway, prefixLength, dns,
server, lease, vendorInfo, domain, mtu
#ifdef SAMSUNG_WIFI_ROAMING
, roaming
#endif
) == -1) {
return -1;
}
return 0;
} else {
snprintf(errmsg, sizeof(errmsg), "DHCP result was %s", prop_value);
return -1;
}
}
/*
* Start the dhcp client daemon, and wait for it to finish
* configuring the interface.
*
* The device init.rc file needs a corresponding entry for this work.
*
* Example:
* service dhcpcd_<interface> /system/bin/dhcpcd -ABKL -f dhcpcd.conf
*/
int dhcp_do_request(const char *interface,
char *ipaddr,
char *gateway,
uint32_t *prefixLength,
char *dns[],
char *server,
uint32_t *lease,
char *vendorInfo,
char *domain,
char *mtu)
{
char result_prop_name[PROPERTY_KEY_MAX];
char daemon_prop_name[PROPERTY_KEY_MAX];
char prop_value[PROPERTY_VALUE_MAX] = {'\0'};
char daemon_cmd[PROPERTY_VALUE_MAX * 2 + sizeof(DHCP_CONFIG_PATH)];
const char *ctrl_prop = "ctl.start";
const char *desired_status = "running";
/* Interface name after converting p2p0-p2p0-X to p2p to reuse system properties */
char p2p_interface[MAX_INTERFACE_LENGTH];
get_p2p_interface_replacement(interface, p2p_interface);
snprintf(result_prop_name, sizeof(result_prop_name), "%s.%s.result",
DHCP_PROP_NAME_PREFIX,
p2p_interface);
snprintf(daemon_prop_name, sizeof(daemon_prop_name), "%s_%s",
DAEMON_PROP_NAME,
p2p_interface);
/* Erase any previous setting of the dhcp result property */
property_set(result_prop_name, "");
/* HACK: Sometimes the lease file appears to be corrupted, which can cause
* unknown errors while obtaining an address. We just remove the corresponding
* lease file prior to starting the daemon...
*/
{
char lease_file_path[PROPERTY_VALUE_MAX];
snprintf(lease_file_path, sizeof(lease_file_path),
"/data/misc/dhcp/dhcpcd-%s.lease",
p2p_interface);
unlink(lease_file_path);
}
/* Start the daemon and wait until it's ready */
if (property_get(HOSTNAME_PROP_NAME, prop_value, NULL) && (prop_value[0] != '\0'))
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-f %s -h %s %s", DAEMON_NAME,
p2p_interface, DHCP_CONFIG_PATH, prop_value, interface);
else
snprintf(daemon_cmd, sizeof(daemon_cmd), "%s_%s:-f %s %s", DAEMON_NAME,
p2p_interface, DHCP_CONFIG_PATH, interface);
memset(prop_value, '\0', PROPERTY_VALUE_MAX);
property_set(ctrl_prop, daemon_cmd);
if (wait_for_property(daemon_prop_name, desired_status, 10) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for dhcpcd to start");
return -1;
}
/* Wait for the daemon to return a result */
if (wait_for_property(result_prop_name, NULL, 30) < 0) {
snprintf(errmsg, sizeof(errmsg), "%s", "Timed out waiting for DHCP to finish");
return -1;
}
if (!property_get(result_prop_name, prop_value, NULL)) {
/* shouldn't ever happen, given the success of wait_for_property() */
snprintf(errmsg, sizeof(errmsg), "%s", "DHCP result property was not set");
return -1;
}
if (strcmp(prop_value, "ok") == 0) {
char dns_prop_name[PROPERTY_KEY_MAX];
if (fill_ip_info(interface, ipaddr, gateway, prefixLength, dns,
server, lease, vendorInfo, domain, mtu) == -1) {
return -1;
}
return 0;
} else {
snprintf(errmsg, sizeof(errmsg), "DHCP result was %s", prop_value);
return -1;
}
}