Separate bind_socket_callback

Author: lrowe

lib/tinykvm/linux/fds.hpp

@@ -29,6 +29,7 @@ namespace tinykvm
 		using open_readable_t = std::function<bool(std::string&)>;
 		using open_writable_t = std::function<bool(std::string&)>;
 		using connect_socket_t = std::function<bool(int, struct sockaddr_storage&)>;
+		using bind_socket_t = std::function<bool(int, struct sockaddr_storage&)>;
 		using listening_socket_t = std::function<bool(int, int)>;
 		using accept_socket_t = std::function<int(int, int, int, struct sockaddr_storage&, socklen_t&)>;
 		using resolve_symlink_t = std::function<bool(std::string&)>;
@@ -321,6 +322,7 @@ namespace tinykvm
 
 	public:
 		connect_socket_t   connect_socket_callback;
+		bind_socket_t      bind_socket_callback;
 		accept_socket_t    accept_socket_callback;
 		listening_socket_t listening_socket_callback;
 		epoll_wait_t       epoll_wait_callback;

lib/tinykvm/linux/system_calls.cpp

@@ -1111,7 +1111,8 @@ void Machine::setup_linux_system_calls(bool unsafe_syscalls)
 			{
 				cpu.machine().copy_from_guest(&addr, g_addr, addrlen);
 				// Validate the address
-				if (UNLIKELY(!cpu.machine().fds().validate_socket_address(fd, addr)))
+				if (auto& callback = cpu.machine().fds().bind_socket_callback;
+						UNLIKELY(callback == nullptr || !callback(fd, addr)))
 				{
 					regs.rax = -EPERM;
 				} else {