Adding upstream version 1:9.16.44.upstream/1%9.16.44upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 301 insertions, 0 deletions

diff --git a/lib/isc/win32/net.c b/lib/isc/win32/net.c
new file mode 100644
index 0000000..ea4656d
--- /dev/null
+++ b/lib/isc/win32/net.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * SPDX-License-Identifier: MPL-2.0
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0.  If a copy of the MPL was not distributed with this
+ * file, you can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <isc/log.h>
+#include <isc/net.h>
+#include <isc/once.h>
+#include <isc/strerr.h>
+#include <isc/string.h>
+#include <isc/util.h>
+
+/*%
+ * Definitions about UDP port range specification.  This is a total mess of
+ * portability variants: some use sysctl (but the sysctl names vary), some use
+ * system-specific interfaces, some have the same interface for IPv4 and IPv6,
+ * some separate them, etc...
+ */
+
+/*%
+ * The last resort defaults: use all non well known port space
+ */
+#ifndef ISC_NET_PORTRANGELOW
+#define ISC_NET_PORTRANGELOW 32768
+#endif /* ISC_NET_PORTRANGELOW */
+#ifndef ISC_NET_PORTRANGEHIGH
+#define ISC_NET_PORTRANGEHIGH 65535
+#endif /* ISC_NET_PORTRANGEHIGH */
+
+static isc_once_t once = ISC_ONCE_INIT;
+static isc_once_t once_ipv6only = ISC_ONCE_INIT;
+static isc_once_t once_ipv6pktinfo = ISC_ONCE_INIT;
+static isc_result_t ipv4_result = ISC_R_NOTFOUND;
+static isc_result_t ipv6_result = ISC_R_NOTFOUND;
+static isc_result_t ipv6only_result = ISC_R_NOTFOUND;
+static isc_result_t ipv6pktinfo_result = ISC_R_NOTFOUND;
+
+void
+InitSockets(void);
+
+static isc_result_t
+try_proto(int domain) {
+	SOCKET s;
+	char strbuf[ISC_STRERRORSIZE];
+	int errval;
+
+	s = socket(domain, SOCK_STREAM, IPPROTO_TCP);
+	if (s == INVALID_SOCKET) {
+		errval = WSAGetLastError();
+		switch (errval) {
+		case WSAEAFNOSUPPORT:
+		case WSAEPROTONOSUPPORT:
+		case WSAEINVAL:
+			return (ISC_R_NOTFOUND);
+		default:
+			strerror_r(errval, strbuf, sizeof(strbuf));
+			UNEXPECTED_ERROR(__FILE__, __LINE__,
+					 "socket() failed: %s", strbuf);
+			return (ISC_R_UNEXPECTED);
+		}
+	}
+
+	closesocket(s);
+
+	return (ISC_R_SUCCESS);
+}
+
+static void
+initialize_action(void) {
+	InitSockets();
+	ipv4_result = try_proto(PF_INET);
+	ipv6_result = try_proto(PF_INET6);
+}
+
+static void
+initialize(void) {
+	RUNTIME_CHECK(isc_once_do(&once, initialize_action) == ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_net_probeipv4(void) {
+	initialize();
+	return (ipv4_result);
+}
+
+isc_result_t
+isc_net_probeipv6(void) {
+	initialize();
+	return (ipv6_result);
+}
+
+isc_result_t
+isc_net_probeunix(void) {
+	return (ISC_R_NOTFOUND);
+}
+
+static void
+try_ipv6only(void) {
+#ifdef IPV6_V6ONLY
+	SOCKET s;
+	int on;
+	char strbuf[ISC_STRERRORSIZE];
+#endif /* ifdef IPV6_V6ONLY */
+	isc_result_t result;
+
+	result = isc_net_probeipv6();
+	if (result != ISC_R_SUCCESS) {
+		ipv6only_result = result;
+		return;
+	}
+
+#ifndef IPV6_V6ONLY
+	ipv6only_result = ISC_R_NOTFOUND;
+	return;
+#else  /* ifndef IPV6_V6ONLY */
+	/* check for TCP sockets */
+	s = socket(PF_INET6, SOCK_STREAM, 0);
+	if (s == INVALID_SOCKET) {
+		strerror_r(errno, strbuf, sizeof(strbuf));
+		UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s",
+				 strbuf);
+		ipv6only_result = ISC_R_UNEXPECTED;
+		return;
+	}
+
+	on = 1;
+	if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&on,
+		       sizeof(on)) < 0)
+	{
+		ipv6only_result = ISC_R_NOTFOUND;
+		goto close;
+	}
+
+	closesocket(s);
+
+	/* check for UDP sockets */
+	s = socket(PF_INET6, SOCK_DGRAM, 0);
+	if (s == INVALID_SOCKET) {
+		strerror_r(errno, strbuf, sizeof(strbuf));
+		UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s",
+				 strbuf);
+		ipv6only_result = ISC_R_UNEXPECTED;
+		return;
+	}
+
+	on = 1;
+	if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (const char *)&on,
+		       sizeof(on)) < 0)
+	{
+		ipv6only_result = ISC_R_NOTFOUND;
+		goto close;
+	}
+
+	ipv6only_result = ISC_R_SUCCESS;
+
+close:
+	closesocket(s);
+	return;
+#endif /* IPV6_V6ONLY */
+}
+
+static void
+initialize_ipv6only(void) {
+	RUNTIME_CHECK(isc_once_do(&once_ipv6only, try_ipv6only) ==
+		      ISC_R_SUCCESS);
+}
+
+#ifdef __notyet__
+/*
+ * XXXMPA requires win32/socket.c to be updated to support
+ * WSASendMsg and WSARecvMsg which are themselves Winsock
+ * and compiler version dependent.
+ */
+static void
+try_ipv6pktinfo(void) {
+	SOCKET s;
+	int on;
+	char strbuf[ISC_STRERRORSIZE];
+	isc_result_t result;
+	int optname;
+
+	result = isc_net_probeipv6();
+	if (result != ISC_R_SUCCESS) {
+		ipv6pktinfo_result = result;
+		return;
+	}
+
+	/* we only use this for UDP sockets */
+	s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP);
+	if (s == INVALID_SOCKET) {
+		strerror_r(errno, strbuf, sizeof(strbuf));
+		UNEXPECTED_ERROR(__FILE__, __LINE__, "socket() failed: %s",
+				 strbuf);
+		ipv6pktinfo_result = ISC_R_UNEXPECTED;
+		return;
+	}
+
+#ifdef IPV6_RECVPKTINFO
+	optname = IPV6_RECVPKTINFO;
+#else  /* ifdef IPV6_RECVPKTINFO */
+	optname = IPV6_PKTINFO;
+#endif /* ifdef IPV6_RECVPKTINFO */
+	on = 1;
+	if (setsockopt(s, IPPROTO_IPV6, optname, (const char *)&on,
+		       sizeof(on)) < 0)
+	{
+		ipv6pktinfo_result = ISC_R_NOTFOUND;
+		goto close;
+	}
+
+	ipv6pktinfo_result = ISC_R_SUCCESS;
+
+close:
+	closesocket(s);
+	return;
+}
+
+static void
+initialize_ipv6pktinfo(void) {
+	RUNTIME_CHECK(isc_once_do(&once_ipv6pktinfo, try_ipv6pktinfo) ==
+		      ISC_R_SUCCESS);
+}
+#endif /* __notyet__ */
+
+isc_result_t
+isc_net_probe_ipv6only(void) {
+	initialize_ipv6only();
+	return (ipv6only_result);
+}
+
+isc_result_t
+isc_net_probe_ipv6pktinfo(void) {
+#ifdef __notyet__
+	initialize_ipv6pktinfo();
+#endif /* __notyet__ */
+	return (ipv6pktinfo_result);
+}
+
+isc_result_t
+isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high) {
+	int result = ISC_R_FAILURE;
+
+	REQUIRE(low != NULL && high != NULL);
+
+	UNUSED(af);
+
+	if (result != ISC_R_SUCCESS) {
+		*low = ISC_NET_PORTRANGELOW;
+		*high = ISC_NET_PORTRANGEHIGH;
+	}
+
+	return (ISC_R_SUCCESS); /* we currently never fail in this function */
+}
+
+void
+isc_net_disableipv4(void) {
+	initialize();
+	if (ipv4_result == ISC_R_SUCCESS) {
+		ipv4_result = ISC_R_DISABLED;
+	}
+}
+
+void
+isc_net_disableipv6(void) {
+	initialize();
+	if (ipv6_result == ISC_R_SUCCESS) {
+		ipv6_result = ISC_R_DISABLED;
+	}
+}
+
+void
+isc_net_enableipv4(void) {
+	initialize();
+	if (ipv4_result == ISC_R_DISABLED) {
+		ipv4_result = ISC_R_SUCCESS;
+	}
+}
+
+void
+isc_net_enableipv6(void) {
+	initialize();
+	if (ipv6_result == ISC_R_DISABLED) {
+		ipv6_result = ISC_R_SUCCESS;
+	}
+}
+
+unsigned int
+isc_net_probedscp(void) {
+	return (0);
+}