String NameConfig::getHostName(bool prefer_loopback) {
// try to pick a good host identifier
ConstString result = "127.0.0.1";
bool loopback = true;
// Pick an IPv4 address.
// Prefer non-local addresses, then shorter addresses.
// Avoid IPv6.
#ifdef YARP_HAS_ACE
ACE_INET_Addr *ips = NULL;
size_t count = 0;
if (ACE::get_ip_interfaces(count,ips)>=0) {
for (size_t i=0; i<count; i++) {
ConstString ip = ips[i].get_host_addr();
#else
int family, s;
char hostname[NI_MAXHOST]; hostname[NI_MAXHOST-1] = '\0';
ConstString ip;
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) == -1) {
perror("getifaddrs in getIps");
exit(EXIT_FAILURE);
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL) continue;
family = ifa->ifa_addr->sa_family;
if (family == AF_INET || family == AF_INET6) {
s = getnameinfo(ifa->ifa_addr,
(family == AF_INET) ? sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6),
hostname, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (s != 0) {
printf("getnameinfo() failed: %s\n", gai_strerror(s));
exit(EXIT_FAILURE);
}
ip = ConstString(hostname);
#endif
YARP_DEBUG(Logger::get(), String("scanning network interface ") +
ip.c_str());
bool take = prefer_loopback;
if (ip.find(":")!=ConstString::npos) continue;
if (!take) {
if (result=="localhost") {
take = true; // can't be worse
}
if (loopback) {
take = true; // can't be worse
} else if (ip.length()<result.length()) {
take = true;
}
}
if (take) {
if (!prefer_loopback) result = ip;
loopback = false;
if (ip == "127.0.0.1" || ip == "127.1.0.1" ||
ip == "127.0.1.1") {
loopback = true;
}
#ifdef YARP_HAS_ACE
#ifdef YARP_ACE_ADDR_HAS_LOOPBACK_METHOD
loopback = ips[i].is_loopback();
#endif
#endif
if (prefer_loopback && loopback) {
result = ip;
}
}
}
#ifdef YARP_HAS_ACE
delete[] ips;
#endif
}
return result.c_str();
}
bool NameConfig::isLocalName(const String& name) {
bool result = false;
#ifdef YARP_HAS_ACE
ACE_INET_Addr *ips = NULL;
size_t count = 0;
if (ACE::get_ip_interfaces(count,ips)>=0) {
for (size_t i=0; i<count; i++) {
String ip = ips[i].get_host_addr();
if (ip==name) {
result = true;
break;
}
}
delete[] ips;
}
#else
/**
* If this does not work properly, use a more sophisticated way
* instead of just gethostname.
*/
char hostname[NI_MAXHOST]; hostname[NI_MAXHOST-1] = '\0';
gethostname(hostname, NI_MAXHOST);
if (strcmp(hostname, name.c_str()) == 0) result = true;
#endif
// just in case
if (name=="localhost"||name=="127.0.0.1") { result = true; }
return result;
}
yarp::os::Bottle NameConfig::getIpsAsBottle() {
yarp::os::Bottle result;
#ifdef YARP_HAS_ACE
ACE_INET_Addr *ips = NULL;
size_t count = 0;
if (ACE::get_ip_interfaces(count,ips)>=0) {
for (size_t i=0; i<count; i++) {
String ip = ips[i].get_host_addr();
result.addString(ip.c_str());
}
delete[] ips;
}
#else
int family, s;
char host[NI_MAXHOST];
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) == -1) {
perror("getifaddrs in getIpsAsBottle");
exit(EXIT_FAILURE);
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL) continue;
family = ifa->ifa_addr->sa_family;
if (family == AF_INET || family == AF_INET6) {
s = getnameinfo(ifa->ifa_addr,
(family == AF_INET) ? sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6),
host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (s != 0) {
printf("getnameinfo() failed: %s\n", gai_strerror(s));
exit(EXIT_FAILURE);
}
result.addString(host);
}
}
#endif
return result;
}
String NameConfig::getIps() {
yarp::os::Bottle bot = getIpsAsBottle();
ConstString result = "";
for (int i=0; i<bot.size(); i++) {
ConstString ip = bot.get(i).asString();
if (i>0) {
result += " ";
}
result += ip;
}
return result.c_str();
}
void NameConfig::setAddress(const Address& address) {
this->address = address;
}
void NameConfig::setNamespace(const String& ns) {
space = ns;
}
String NameConfig::getNamespace(bool refresh) {
if (space==""||refresh) {
ConstString senv = NetworkBase::getEnvironment("YARP_NAMESPACE");
if (senv!="") {
spaces.fromString(senv.c_str());
} else {
String fname = getConfigFileName(YARP_CONFIG_NAMESPACE_FILENAME);
spaces.fromString(readConfig(fname).c_str());
}
space = spaces.get(0).asString().c_str();
if (space=="") {
space = "/root";
}
if (spaces.size()==0) {
spaces.addString("/root");
}
}
return space;
}
Bottle NameConfig::getNamespaces(bool refresh) {
getNamespace(refresh);
return spaces;
}
