1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/unix/socket_helpers.h b/drivers/unix/socket_helpers.h
new file mode 100644
index 0000000000..962f228c3c
--- /dev/null
+++ b/drivers/unix/socket_helpers.h
@@ -0,0 +1,110 @@
+#ifndef SOCKET_HELPERS_H
+#define SOCKET_HELPERS_H
+
+#include <string.h>
+
+#ifdef WINDOWS_ENABLED
+ // Workaround mingw missing flags!
+ #ifndef IPV6_V6ONLY
+  #define IPV6_V6ONLY 27
+ #endif
+#endif
+
+#ifdef UWP_ENABLED
+#define in6addr_any IN6ADDR_ANY_INIT
+#endif
+
+// helpers for sockaddr -> IP_Address and back, should work for posix and winsock. All implementations should use this
+
+static size_t _set_sockaddr(struct sockaddr_storage* p_addr, const IP_Address& p_ip, int p_port, IP::Type p_sock_type = IP::TYPE_ANY) {
+
+	memset(p_addr, 0, sizeof(struct sockaddr_storage));
+
+	ERR_FAIL_COND_V(p_ip==IP_Address(),0);
+
+	// IPv6 socket
+	if (p_sock_type == IP::TYPE_IPV6 || p_sock_type == IP::TYPE_ANY) {
+
+		// IPv6 only socket with IPv4 address
+		ERR_FAIL_COND_V(p_sock_type == IP::TYPE_IPV6 && p_ip.is_ipv4(),0);
+
+		struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
+		addr6->sin6_family = AF_INET6;
+		addr6->sin6_port = htons(p_port);
+		copymem(&addr6->sin6_addr.s6_addr, p_ip.get_ipv6(), 16);
+		return sizeof(sockaddr_in6);
+
+	} else { // IPv4 socket
+
+		// IPv4 socket with IPv6 address
+		ERR_FAIL_COND_V(!p_ip.is_ipv4(),0);
+
+		uint32_t ipv4 = *((uint32_t *)p_ip.get_ipv4());
+		struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
+		addr4->sin_family = AF_INET;
+		addr4->sin_port = htons(p_port);  // short, network byte order
+		copymem(&addr4->sin_addr.s_addr, p_ip.get_ipv4(), 16);
+		return sizeof(sockaddr_in);
+	};
+};
+
+static size_t _set_listen_sockaddr(struct sockaddr_storage* p_addr, int p_port, IP::Type p_sock_type, const List<String> *p_accepted_hosts) {
+
+	memset(p_addr, 0, sizeof(struct sockaddr_storage));
+	if (p_sock_type == IP::TYPE_IPV4) {
+		struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
+		addr4->sin_family = AF_INET;
+		addr4->sin_port = htons(p_port);
+		addr4->sin_addr.s_addr = INADDR_ANY; // TODO: use accepted hosts list
+		return sizeof(sockaddr_in);
+	} else {
+		struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
+
+		addr6->sin6_family = AF_INET6;
+		addr6->sin6_port = htons(p_port);
+		addr6->sin6_addr = in6addr_any; // TODO: use accepted hosts list
+		return sizeof(sockaddr_in6);
+	};
+};
+
+static int _socket_create(IP::Type p_type, int type, int protocol) {
+
+	ERR_FAIL_COND_V(p_type > IP::TYPE_ANY || p_type < IP::TYPE_NONE, ERR_INVALID_PARAMETER);
+
+	int family = p_type == IP::TYPE_IPV4 ? AF_INET : AF_INET6;
+	int sockfd = socket(family, type, protocol);
+
+	ERR_FAIL_COND_V( sockfd == -1, -1 );
+
+	if(family == AF_INET6) {
+		// Select IPv4 over IPv6 mapping
+		int opt = p_type != IP::TYPE_ANY;
+		if(setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY, (const char*)&opt, sizeof(opt)) != 0) {
+			WARN_PRINT("Unable to set/unset IPv4 address mapping over IPv6");
+		}
+	}
+
+	return sockfd;
+}
+
+
+static void _set_ip_addr_port(IP_Address& r_ip, int& r_port, struct sockaddr_storage* p_addr) {
+
+	if (p_addr->ss_family == AF_INET) {
+
+		struct sockaddr_in* addr4 = (struct sockaddr_in*)p_addr;
+		r_ip.set_ipv4((uint8_t *)&(addr4->sin_addr.s_addr));
+
+		r_port = ntohs(addr4->sin_port);
+
+	} else if (p_addr->ss_family == AF_INET6) {
+
+		struct sockaddr_in6* addr6 = (struct sockaddr_in6*)p_addr;
+		r_ip.set_ipv6(addr6->sin6_addr.s6_addr);
+
+		r_port = ntohs(addr6->sin6_port);
+	};
+};
+
+
+#endif