C++ condor_sockaddr::from_ip_string方法代码示例

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;
//.........这里部分代码省略.........

void init_local_hostname()
{
		// [m.]
		// initializing local hostname, ip address, fqdn was
		// super complex.
		//
		// implementation was scattered over condor_netdb and
		// my_hostname, get_full_hostname.
		//
		// above them has duplicated code in many ways.
		// so I aggregated all of them into here.

	bool ipaddr_inited = false;
	char hostname[MAXHOSTNAMELEN];
	int ret;

		// [TODO:IPV6] condor_gethostname is not IPv6 safe.
		// reimplement it.
	ret = condor_gethostname(hostname, sizeof(hostname));
	if (ret) {
		dprintf(D_ALWAYS, "condor_gethostname() failed. Cannot initialize "
				"local hostname, ip address, FQDN.\n");
		return;
	}

	dprintf(D_HOSTNAME, "condor_gethostname() claims we are %s\n", hostname);

	// Fallback case.
	local_hostname = hostname;

		// if NETWORK_INTERFACE is defined, we use that as a local ip addr.
	MyString network_interface;
	if (param(network_interface, "NETWORK_INTERFACE", "*")) {
		if (local_ipaddr.from_ip_string(network_interface))
			ipaddr_inited = true;
	}

		// Dig around for an IP address in the interfaces
		// TODO WARNING: Will only return IPv4 addresses!
	if( ! ipaddr_inited ) {
		std::string ip;
		if( ! network_interface_to_ip("NETWORK_INTERFACE", network_interface.Value(), ip, NULL)) {
			dprintf(D_ALWAYS, "Unable to identify IP address from interfaces.  None matches NETWORK_INTERFACE=%s. Problems are likely.\n", network_interface.Value());
			return;
		}
		if ( ! local_ipaddr.from_ip_string(ip))
		{
			// Should not happen; means network_interface_to_ip returned
			// invalid IP address.
			ASSERT(FALSE);
		}
		ipaddr_inited = true;
	}

		// now initialize hostname and fqdn
	if (nodns_enabled()) { // if nodns is enabled, we can cut some slack.
			// condor_gethostname() returns a hostname with
			// DEFAULT_DOMAIN_NAME. Thus, it is always fqdn
		local_fqdn = hostname;
		if (!ipaddr_inited) {
			local_ipaddr = convert_hostname_to_ipaddr(local_hostname);
		}
		return;
	}

	addrinfo_iterator ai;
	ret = ipv6_getaddrinfo(hostname, NULL, ai);
	if (ret) {
			// write some error message
		dprintf(D_HOSTNAME, "hostname %s cannot be resolved by getaddrinfo\n",
				hostname);
		return;
	}
	
	int local_hostname_desireability = 0;
	while (addrinfo* info = ai.next()) {
		const char* name = info->ai_canonname;
		if (!name)
			continue;
		condor_sockaddr addr(info->ai_addr);

		int desireability = 0;
		if (addr.is_loopback())            { desireability = 1; }
		else if(addr.is_private_network()) { desireability = 2; }
		else                               { desireability = 3; }
		dprintf(D_HOSTNAME, "Considering %s (Ranked at %d) as possible local hostname versus %s/%s (%d)\n", name, desireability, local_hostname.Value(), local_fqdn.Value(), local_hostname_desireability);
		if(desireability < local_hostname_desireability) { continue; }
		local_hostname_desireability = desireability;

		if (!ipaddr_inited)
			local_ipaddr = addr;

		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;
//.........这里部分代码省略.........