/**
* Sets req and node_ipp if interface ifname exist and MAC is valid.
* @return true if success
*/
static bool
check_mac_and_get_ipaddr(int fdesc, const char *ifname, struct ifreq *req, char **node_ipp)
{
strcpy(req->ifr_name, ifname);
if (ioctl(fdesc, SIOCGIFHWADDR, req) != 0) {
return false;
}
uint8_t *mac = (uint8_t *)req->ifr_ifru.ifru_hwaddr.sa_data;
static const uint8_t zero[6] = {0, 0, 0, 0, 0, 0};
static const uint8_t ff[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
/* MAC address sanity check */
if (memcmp(mac, zero, 6) == 0
|| memcmp(mac, ff, 6) == 0) {
return false;
}
/* Get IP address */
if (cf_ipaddr_get(fdesc, req->ifr_name, node_ipp) != 0) {
return false;
}
return true;
}
int
cf_nodeid_get( unsigned short port, cf_node *id, char **node_ipp, hb_mode_enum hb_mode, char **hb_addrp, char **config_interface_names)
{
int fdesc;
struct ifreq req;
// The default interface names can be overridden by the interface name passed into config
char **interface_names = default_interface_names;
bool default_config = true;
int jlimit = 11;
if (config_interface_names) {
interface_names = config_interface_names;
default_config = false;
jlimit = 1;
}
if (0 >= (fdesc = socket(AF_INET, SOCK_STREAM, 0))) {
cf_warning(CF_MISC, "can't open socket: %d %s", errno, cf_strerror(errno));
return(-1);
}
int i = 0;
bool done = false;
while ((interface_names[i]) && (!done)) {
int j=0;
while ((!done) && (j < jlimit)) {
if (default_config)
sprintf(req.ifr_name, interface_names[i],j);
else
sprintf(req.ifr_name, interface_names[i]);
if (0 == ioctl(fdesc, SIOCGIFHWADDR, &req)) {
if (cf_ipaddr_get(fdesc, req.ifr_name, node_ipp) == 0) {
done = true;
break;
}
}
cf_debug(CF_MISC, "can't get physical address of interface %s: %d %s", req.ifr_name, errno, cf_strerror(errno));
j++;
}
i++;
}
if (!done) {
if (default_config) {
struct ifaddrs* interface_addrs = NULL;
if (getifaddrs(&interface_addrs) == -1) {
cf_warning(CF_MISC, "getifaddrs failed %d %s", errno, cf_strerror(errno));
return -1;
}
if (!interface_addrs) {
cf_warning(CF_MISC, "getifaddrs returned NULL");
return -1;
}
struct ifaddrs *ifa;
for (ifa = interface_addrs; ifa != NULL && (!done); ifa = ifa->ifa_next) {
if (ifa->ifa_data != 0) {
struct ifreq req;
strcpy(req.ifr_name, ifa->ifa_name);
/* Get MAC address */
if (ioctl(fdesc, SIOCGIFHWADDR, &req) == 0) {
uint8_t* mac = (uint8_t*)req.ifr_ifru.ifru_hwaddr.sa_data;
/* MAC address sanity check */
if ((mac[0] == 0 && mac[1] == 0 && mac[2] == 0
&& mac[3] == 0 && mac[4] == 0 && mac[5] == 0)
|| (mac[0] == 0xff && mac[1] == 0xff && mac[2] == 0xff
&& mac[3] == 0xff && mac[4] == 0xff && mac[5] == 0xff )) {
continue;
}
/* Get IP address */
if (cf_ipaddr_get(fdesc, req.ifr_name, node_ipp) == 0) {
done = true;
continue;
}
}
else {
/* Continue to the next interface if cannot get MAC address */
continue;
}
}
}
}
else {
cf_warning(CF_MISC, "can't get physical address of interface name specfied in config file, tried %s. fatal: %d %s", interface_names[0], errno, cf_strerror(errno));
close(fdesc);
return(-1);
}
}
if (!done) {
cf_warning(CF_MISC, "Tried eth,bond,wlan and list of all available interfaces on device.Failed to retrieve physical address with errno %d %s\n", errno, cf_strerror(errno));
close(fdesc);
return(-1);
}
close(fdesc);
/*
* Set the hb_addr to be the same as the ip address if the mode is mesh and the hb_addr parameter is empty
* Configuration file overrides the automatic node ip detection
* - this gives us a work around in case the node ip is somehow detected wrong in production
*/
if (hb_mode == AS_HB_MODE_MESH)
{
if (*hb_addrp == NULL)
*hb_addrp = cf_strdup(*node_ipp);
cf_info(CF_MISC, "Heartbeat address for mesh: %s", *hb_addrp);
}
*id = 0;
memcpy(id, req.ifr_hwaddr.sa_data, 6);
memcpy(((byte *)id) + 6, &port, 2);
cf_debug(CF_MISC, "port %d id %"PRIx64, port, *id);
return(0);
}
/*
* Gets a unique id for this process instance
* Uses the mac address right now
* And combine with the unique port number, which is why it needs to be passed in
* Needs to be a little more subtle:
* Should stash the mac address or something, in case you have to replace a card.
*
* parameters-
* Input params:
* port - used in setting Node ID
* hb_mode - Controls whether hb_addrp is filled out with the IP address.
* config_interface_names - Pointer to an array of interface names if specified in the config file,
* NULL if absent.
*
* Output params:
* id - Node ID (address and port)
* node_ipp - Pointer wherein the IP address is stored
* hb_addrp - Pointer to a string wherein the heartbeat address is stored, as specified by hb_mode
*/
int
cf_nodeid_get(unsigned short port, cf_node *id, char **node_ipp, hb_mode_enum hb_mode, char **hb_addrp, const char **config_interface_names)
{
// The default interface names can be overridden by the interface name passed into config
const char **interface_names = default_interface_names;
bool default_config = true;
int jlimit = 11;
if (config_interface_names) {
interface_names = config_interface_names;
default_config = false;
jlimit = 1;
}
int fdesc = socket(AF_INET, SOCK_STREAM, 0);
if (fdesc <= 0) {
cf_warning(CF_MISC, "can't open socket: %d %s", errno, cf_strerror(errno));
return(-1);
}
struct ifreq req;
bool done = false;
for (int i = 0; interface_names[i]; i++) {
for (int j = 0; j < jlimit; j++) {
if (default_config) {
sprintf(req.ifr_name, interface_names[i], j);
}
else {
sprintf(req.ifr_name, "%s", interface_names[i]);
}
if (0 == ioctl(fdesc, SIOCGIFHWADDR, &req)) {
if (cf_ipaddr_get(fdesc, req.ifr_name, node_ipp) == 0) {
done = true;
break;
}
}
cf_debug(CF_MISC, "can't get physical address of interface %s: %d %s", req.ifr_name, errno, cf_strerror(errno));
}
if (done) {
break;
}
}
if (! done) {
if (default_config) {
struct ifaddrs *interface_addrs = NULL;
if (getifaddrs(&interface_addrs) == -1) {
cf_warning(CF_MISC, "getifaddrs failed %d %s", errno, cf_strerror(errno));
return -1;
}
if (! interface_addrs) {
cf_warning(CF_MISC, "getifaddrs returned NULL");
return -1;
}
struct ifaddrs *ifa;
for (ifa = interface_addrs; ifa != NULL; ifa = ifa->ifa_next) {
if (! ifa->ifa_data) {
continue;
}
if (! is_biosdevname(ifa->ifa_name)) {
continue;
}
if (check_mac_and_get_ipaddr(fdesc, ifa->ifa_name, &req, node_ipp)) {
done = true;
break;
}
}
for (ifa = interface_addrs; ifa != NULL && (! done); ifa = ifa->ifa_next) {
if (! ifa->ifa_data) {
continue;
}
if (check_mac_and_get_ipaddr(fdesc, ifa->ifa_name, &req, node_ipp)) {
done = true;
break;
}
}
freeifaddrs(interface_addrs);
}
else {
cf_warning(CF_MISC, "can't get physical address of interface name specified in config file, tried %s. fatal: %d %s", interface_names[0], errno, cf_strerror(errno));
close(fdesc);
return(-1);
}
}
close(fdesc);
if (! done) {
cf_warning(CF_MISC, "Tried eth,bond,wlan,em and list of all available interfaces on device. Failed to retrieve physical address with errno %d %s\n", errno, cf_strerror(errno));
return(-1);
}
/*
* Set the hb_addr to be the same as the ip address if the mode is mesh and the hb_addr parameter is empty
* Configuration file overrides the automatic node ip detection
* - this gives us a work around in case the node ip is somehow detected wrong in production
*/
if (hb_mode == AS_HB_MODE_MESH) {
if (*hb_addrp == NULL) {
*hb_addrp = cf_strdup(*node_ipp);
}
cf_info(CF_MISC, "Heartbeat address for mesh: %s", *hb_addrp);
}
*id = 0;
memcpy(id, req.ifr_hwaddr.sa_data, 6);
memcpy(((byte *)id) + 6, &port, 2);
cf_debug(CF_MISC, "port %d id %"PRIx64, port, *id);
return(0);
}
