socket interfaces: sc_getpeername: initial integration.

Integration of this function into the library has been delayed
since the AFD ioctl operation, while succeeding, seems to only
memset the caller's address buffer, and accordingly to never
copy the remote socket address to it. Callers of sc_getpeername()
should therefore first check the return value for success -- which
may be used as indication that the socket is connected -- and then
test the returned address buffer for validity.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/socket/ntapi_sc_getpeername_v1.c b/src/socket/ntapi_sc_getpeername_v1.c
new file mode 100644
index 0000000..f38e11a
--- /dev/null
+++ b/src/socket/ntapi_sc_getpeername_v1.c
@@ -0,0 +1,80 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2016  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_object.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/nt_socket.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+typedef struct _nt_afd_server_socket_name_info {
+	uint32_t	unknown;
+	uint32_t	type;
+	uint32_t	service_flags;
+	char		sa_data[14];
+} nt_afd_server_socket_name_info;
+
+
+struct __addr_memcpy {
+	uint16_t	d0;
+	uint16_t	d1;
+	uint16_t	d2;
+	uint16_t	d3;
+	uint16_t	d4;
+	uint16_t	d5;
+	uint16_t	d6;
+	uint16_t	d7;
+};
+
+
+int32_t __cdecl __ntapi_sc_getpeername_v1(
+	__in	nt_socket *		hssocket,
+	__in	nt_sockaddr *		addr,
+	__in	uint16_t *		addrlen,
+	__out	nt_io_status_block *	iosb	__optional)
+{
+	nt_io_status_block		siosb;
+	nt_afd_server_socket_name_info	sock_name_info;
+
+	struct __addr_memcpy *		asrc;
+	struct __addr_memcpy *		adst;
+
+	iosb = iosb ? iosb : &siosb;
+
+	hssocket->iostatus = __ntapi->zw_device_io_control_file(
+			hssocket->hsocket,
+			hssocket->hevent,
+			0,
+			0,
+			iosb,
+			NT_AFD_IOCTL_GET_PEER_NAME,
+			0,
+			0,
+			&sock_name_info,
+			sizeof(sock_name_info));
+
+	__ntapi->sc_wait(hssocket,iosb,0);
+
+	if (!hssocket->iostatus) {
+		addr->sa_addr_in4.sa_family = hssocket->domain;
+
+		asrc = (struct __addr_memcpy *)&(sock_name_info.sa_data);
+		adst = (struct __addr_memcpy *)addr;
+
+		adst->d1 = asrc->d0;
+		adst->d2 = asrc->d1;
+		adst->d3 = asrc->d2;
+		adst->d4 = asrc->d3;
+		adst->d5 = asrc->d4;
+		adst->d6 = asrc->d5;
+		adst->d7 = asrc->d6;
+
+		*addrlen = (uint16_t)iosb->info;
+	};
+
+	return hssocket->iostatus;
+}