1 files changed, 273 insertions, 0 deletions
diff --git a/src/network/address.cpp b/src/network/address.cpp
new file mode 100644
index 000000000..f698a2e91
--- /dev/null
+++ b/src/network/address.cpp
@@ -0,0 +1,273 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "address.h"
+
+#include <cstdio>
+#include <iostream>
+#include <cstdlib>
+#include <cstring>
+#include <cerrno>
+#include <sstream>
+#include <iomanip>
+#include "network/networkexceptions.h"
+#include "util/string.h"
+#include "util/numeric.h"
+#include "constants.h"
+#include "debug.h"
+#include "settings.h"
+#include "log.h"
+
+#ifdef _WIN32
+// Without this some of the network functions are not found on mingw
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0501
+#endif
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#define LAST_SOCKET_ERR() WSAGetLastError()
+typedef SOCKET socket_t;
+typedef int socklen_t;
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#define LAST_SOCKET_ERR() (errno)
+typedef int socket_t;
+#endif
+
+/*
+	Address
+*/
+
+Address::Address()
+{
+	memset(&m_address, 0, sizeof(m_address));
+}
+
+Address::Address(u32 address, u16 port)
+{
+	memset(&m_address, 0, sizeof(m_address));
+	setAddress(address);
+	setPort(port);
+}
+
+Address::Address(u8 a, u8 b, u8 c, u8 d, u16 port)
+{
+	memset(&m_address, 0, sizeof(m_address));
+	setAddress(a, b, c, d);
+	setPort(port);
+}
+
+Address::Address(const IPv6AddressBytes *ipv6_bytes, u16 port)
+{
+	memset(&m_address, 0, sizeof(m_address));
+	setAddress(ipv6_bytes);
+	setPort(port);
+}
+
+// Equality (address family, address and port must be equal)
+bool Address::operator==(const Address &address)
+{
+	if (address.m_addr_family != m_addr_family || address.m_port != m_port)
+		return false;
+
+	if (m_addr_family == AF_INET) {
+		return m_address.ipv4.sin_addr.s_addr ==
+		       address.m_address.ipv4.sin_addr.s_addr;
+	}
+
+	if (m_addr_family == AF_INET6) {
+		return memcmp(m_address.ipv6.sin6_addr.s6_addr,
+				       address.m_address.ipv6.sin6_addr.s6_addr, 16) == 0;
+	}
+
+	return false;
+}
+
+bool Address::operator!=(const Address &address)
+{
+	return !(*this == address);
+}
+
+void Address::Resolve(const char *name)
+{
+	if (!name || name[0] == 0) {
+		if (m_addr_family == AF_INET) {
+			setAddress((u32)0);
+		} else if (m_addr_family == AF_INET6) {
+			setAddress((IPv6AddressBytes *)0);
+		}
+		return;
+	}
+
+	struct addrinfo *resolved, hints;
+	memset(&hints, 0, sizeof(hints));
+
+	// Setup hints
+	hints.ai_socktype = 0;
+	hints.ai_protocol = 0;
+	hints.ai_flags = 0;
+	if (g_settings->getBool("enable_ipv6")) {
+		// AF_UNSPEC allows both IPv6 and IPv4 addresses to be returned
+		hints.ai_family = AF_UNSPEC;
+	} else {
+		hints.ai_family = AF_INET;
+	}
+
+	// Do getaddrinfo()
+	int e = getaddrinfo(name, NULL, &hints, &resolved);
+	if (e != 0)
+		throw ResolveError(gai_strerror(e));
+
+	// Copy data
+	if (resolved->ai_family == AF_INET) {
+		struct sockaddr_in *t = (struct sockaddr_in *)resolved->ai_addr;
+		m_addr_family = AF_INET;
+		m_address.ipv4 = *t;
+	} else if (resolved->ai_family == AF_INET6) {
+		struct sockaddr_in6 *t = (struct sockaddr_in6 *)resolved->ai_addr;
+		m_addr_family = AF_INET6;
+		m_address.ipv6 = *t;
+	} else {
+		freeaddrinfo(resolved);
+		throw ResolveError("");
+	}
+	freeaddrinfo(resolved);
+}
+
+// IP address -> textual representation
+std::string Address::serializeString() const
+{
+// windows XP doesnt have inet_ntop, maybe use better func
+#ifdef _WIN32
+	if (m_addr_family == AF_INET) {
+		u8 a, b, c, d;
+		u32 addr;
+		addr = ntohl(m_address.ipv4.sin_addr.s_addr);
+		a = (addr & 0xFF000000) >> 24;
+		b = (addr & 0x00FF0000) >> 16;
+		c = (addr & 0x0000FF00) >> 8;
+		d = (addr & 0x000000FF);
+		return itos(a) + "." + itos(b) + "." + itos(c) + "." + itos(d);
+	} else if (m_addr_family == AF_INET6) {
+		std::ostringstream os;
+		for (int i = 0; i < 16; i += 2) {
+			u16 section = (m_address.ipv6.sin6_addr.s6_addr[i] << 8) |
+				      (m_address.ipv6.sin6_addr.s6_addr[i + 1]);
+			os << std::hex << section;
+			if (i < 14)
+				os << ":";
+		}
+		return os.str();
+	} else
+		return std::string("");
+#else
+	char str[INET6_ADDRSTRLEN];
+	if (inet_ntop(m_addr_family,
+			    (m_addr_family == AF_INET)
+					    ? (void *)&(m_address.ipv4.sin_addr)
+					    : (void *)&(m_address.ipv6.sin6_addr),
+			    str, INET6_ADDRSTRLEN) == NULL) {
+		return std::string("");
+	}
+	return std::string(str);
+#endif
+}
+
+struct sockaddr_in Address::getAddress() const
+{
+	return m_address.ipv4; // NOTE: NO PORT INCLUDED, use getPort()
+}
+
+struct sockaddr_in6 Address::getAddress6() const
+{
+	return m_address.ipv6; // NOTE: NO PORT INCLUDED, use getPort()
+}
+
+u16 Address::getPort() const
+{
+	return m_port;
+}
+
+int Address::getFamily() const
+{
+	return m_addr_family;
+}
+
+bool Address::isIPv6() const
+{
+	return m_addr_family == AF_INET6;
+}
+
+bool Address::isZero() const
+{
+	if (m_addr_family == AF_INET) {
+		return m_address.ipv4.sin_addr.s_addr == 0;
+	}
+
+	if (m_addr_family == AF_INET6) {
+		static const char zero[16] = {0};
+		return memcmp(m_address.ipv6.sin6_addr.s6_addr, zero, 16) == 0;
+	}
+	return false;
+}
+
+void Address::setAddress(u32 address)
+{
+	m_addr_family = AF_INET;
+	m_address.ipv4.sin_family = AF_INET;
+	m_address.ipv4.sin_addr.s_addr = htonl(address);
+}
+
+void Address::setAddress(u8 a, u8 b, u8 c, u8 d)
+{
+	m_addr_family = AF_INET;
+	m_address.ipv4.sin_family = AF_INET;
+	u32 addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
+	m_address.ipv4.sin_addr.s_addr = addr;
+}
+
+void Address::setAddress(const IPv6AddressBytes *ipv6_bytes)
+{
+	m_addr_family = AF_INET6;
+	m_address.ipv6.sin6_family = AF_INET6;
+	if (ipv6_bytes)
+		memcpy(m_address.ipv6.sin6_addr.s6_addr, ipv6_bytes->bytes, 16);
+	else
+		memset(m_address.ipv6.sin6_addr.s6_addr, 0, 16);
+}
+
+void Address::setPort(u16 port)
+{
+	m_port = port;
+}
+
+void Address::print(std::ostream *s) const
+{
+	if (m_addr_family == AF_INET6)
+		*s << "[" << serializeString() << "]:" << m_port;
+	else
+		*s << serializeString() << ":" << m_port;
+}