condor_sockaddr get_local_ipaddr(condor_protocol proto)
{
init_local_hostname();
if ((proto == CP_IPV4) && local_ipv4addr.is_ipv4()) { return local_ipv4addr; }
if ((proto == CP_IPV6) && local_ipv6addr.is_ipv6()) { return local_ipv6addr; }
return local_ipaddr;
}
bool condor_sockaddr::compare_address(const condor_sockaddr& addr) const
{
if (is_ipv4()) {
if (!addr.is_ipv4())
return false;
return v4.sin_addr.s_addr == addr.v4.sin_addr.s_addr;
} else if (is_ipv6()) {
if (!addr.is_ipv6())
return false;
return memcmp((const void*)&v6.sin6_addr,
(const void*)&addr.v6.sin6_addr,
sizeof(in6_addr)) == 0;
}
return false;
}
bool init_local_hostname_impl()
{
bool local_hostname_initialized = false;
if (param(local_hostname, "NETWORK_HOSTNAME")) {
local_hostname_initialized = true;
dprintf(D_HOSTNAME, "NETWORK_HOSTNAME says we are %s\n", local_hostname.Value());
}
if( ! local_hostname_initialized ) {
// [TODO:IPV6] condor_gethostname is not IPv6 safe. Reimplement it.
char hostname[MAXHOSTNAMELEN];
int ret = condor_gethostname(hostname, sizeof(hostname));
if (ret) {
dprintf(D_ALWAYS, "condor_gethostname() failed. Cannot initialize "
"local hostname, ip address, FQDN.\n");
return false;
}
local_hostname = hostname;
}
MyString test_hostname = local_hostname;
bool local_ipaddr_initialized = false;
bool local_ipv4addr_initialized = false;
bool local_ipv6addr_initialized = false;
MyString network_interface;
if (param(network_interface, "NETWORK_INTERFACE")) {
if(local_ipaddr_initialized == false &&
local_ipaddr.from_ip_string(network_interface)) {
local_ipaddr_initialized = true;
if(local_ipaddr.is_ipv4()) {
local_ipv4addr = local_ipaddr;
local_ipv4addr_initialized = true;
}
if(local_ipaddr.is_ipv6()) {
local_ipv6addr = local_ipaddr;
local_ipv6addr_initialized = true;
}
}
}
if( ! local_ipaddr_initialized ) {
std::string ipv4, ipv6, ipbest;
if( network_interface_to_ip("NETWORK_INTERFACE", network_interface.Value(), ipv4, ipv6, ipbest, NULL)) {
ASSERT(local_ipaddr.from_ip_string(ipbest));
// If this fails, network_interface_to_ip returns something invalid.
local_ipaddr_initialized = true;
} else {
dprintf(D_ALWAYS, "Unable to identify IP address from interfaces. None match NETWORK_INTERFACE=%s. Problems are likely.\n", network_interface.Value());
}
if((!ipv4.empty()) && local_ipv4addr.from_ip_string(ipv4)) {
local_ipv4addr_initialized = true;
ASSERT(local_ipv4addr.is_ipv4());
}
if((!ipv6.empty()) && local_ipv6addr.from_ip_string(ipv6)) {
local_ipv6addr_initialized = true;
ASSERT(local_ipv6addr.is_ipv6());
}
}
bool local_fqdn_initialized = false;
if (nodns_enabled()) {
// condor_gethostname() returns a hostname with
// DEFAULT_DOMAIN_NAME. Thus, it is always fqdn
local_fqdn = local_hostname;
local_fqdn_initialized = true;
if (!local_ipaddr_initialized) {
local_ipaddr = convert_hostname_to_ipaddr(local_hostname);
local_ipaddr_initialized = true;
}
}
addrinfo_iterator ai;
if( ! nodns_enabled() ) {
const int MAX_TRIES = 20;
const int SLEEP_DUR = 3;
bool gai_success = false;
for(int try_count = 1; true; try_count++) {
addrinfo hint = get_default_hint();
hint.ai_family = AF_UNSPEC;
int ret = ipv6_getaddrinfo(test_hostname.Value(), NULL, ai, hint);
if(ret == 0) { gai_success = true; break; }
if(ret != EAI_AGAIN ) {
dprintf(D_ALWAYS, "init_local_hostname_impl: ipv6_getaddrinfo() could not look up '%s': %s (%d). Error is not recoverable; giving up. Problems are likely.\n", test_hostname.Value(), gai_strerror(ret), ret );
gai_success = false;
break;
}
dprintf(D_ALWAYS, "init_local_hostname_impl: ipv6_getaddrinfo() returned EAI_AGAIN for '%s'. Will try again after sleeping %d seconds (try %d of %d).\n", test_hostname.Value(), SLEEP_DUR, try_count + 1, MAX_TRIES );
if(try_count == MAX_TRIES) {
dprintf(D_ALWAYS, "init_local_hostname_impl: ipv6_getaddrinfo() never succeeded. Giving up. Problems are likely\n");
break;
}
sleep(SLEEP_DUR);
}
if(gai_success) {
int local_hostname_desireability = 0;
#ifdef TEST_DNS_TODO
int local_ipaddr_desireability = 0;
int local_ipv4addr_desireability = 0;
int local_ipv6addr_desireability = 0;
#endif
while (addrinfo* info = ai.next()) {
// TODO: the only time ai_canonname should be set is the first
// record. Why are we testing its desirability?
const char* name = info->ai_canonname;
if (!name)
continue;
condor_sockaddr addr(info->ai_addr);
int desireability = addr.desirability();
const char * result = "skipped for low score";
if(desireability > local_hostname_desireability) {
result = "new winner";
dprintf(D_HOSTNAME, " I like it.\n");
local_hostname_desireability = desireability;
const char* dotpos = strchr(name, '.');
if (dotpos) { // consider it as a FQDN
local_fqdn = name;
local_hostname = local_fqdn.Substr(0, dotpos-name-1);
} else {
local_hostname = name;
local_fqdn = local_hostname;
MyString default_domain;
if (param(default_domain, "DEFAULT_DOMAIN_NAME")) {
if (default_domain[0] != '.')
local_fqdn += ".";
local_fqdn += default_domain;
}
}
}
dprintf(D_HOSTNAME, "hostname: %s (score %d) %s\n", name, desireability, result);
#ifdef TEST_DNS_TODO
// Resist urge to set local_ip*addr_initialized=true,
// We want to repeatedly retest this looking for
// better results.
if (!local_ipaddr_initialized) {
replace_higher_scoring_addr("IP",
local_ipaddr, local_ipaddr_desireability,
addr, desireability);
}
if (addr.is_ipv4() && !local_ipv4addr_initialized) {
replace_higher_scoring_addr("IPv4",
local_ipv4addr, local_ipv4addr_desireability,
addr, desireability);
}
if (addr.is_ipv6() && !local_ipv6addr_initialized) {
replace_higher_scoring_addr("IPv6",
local_ipv6addr, local_ipv6addr_desireability,
addr, desireability);
}
#else
// Make Fedora quit complaining.
if( local_ipv4addr_initialized && local_ipv6addr_initialized && local_fqdn_initialized ) {
local_ipv4addr_initialized = false;
local_ipv6addr_initialized = false;
local_fqdn_initialized = false;
}
#endif
}
}
}
return true;
}
