[release/6.0-rc2] [iOS] Make sure IPGlobalProperties and NetworkInter…

…face.GetIsNetworkAvailable methods return the correct info (#59258)

Backport of #57096

This change makes sure some of the IPGlobalProperties stop throwing exceptions and return the correct values.

GetIPv4GlobalStatistics, GetIcmpV4Statistics, GetTcpIPv4Statistics, GetUdpIPv4Statistics no longer throw NetworkInformationException.

GetActiveTcpConnections no longer returns TcpConnectionInformation instances only with the State of Unknown.

GetActiveTcpListeners return the correct IPEndPoint details for the IPV6 loopback.

NetworkInterface.GetIsNetworkAvailable no longer returns false for every call.

The reason these methods were behaving incorrectly on iOS is due to Apple not including the public headers for icmp_var.h, ip_var.h, tcp_fsm.h, if_media.h, and udp_var.h in the iOS SDK. This would lead to, for example, pal_tcpstate.c always returning TcpState_Unknown even if the underlying native value was TCPS_ESTABLISHED. This change includes the missing public headers in our build.

Fixes #36890

src/libraries/Native/Unix/Common/pal_config.h.in

@@ -78,6 +78,10 @@
 #cmakedefine01 HAVE_NETINET_IP_VAR_H
 #cmakedefine01 HAVE_NETINET_ICMP_VAR_H
 #cmakedefine01 HAVE_IOS_NET_ROUTE_H
+#cmakedefine01 HAVE_IOS_NETINET_IP_VAR_H
+#cmakedefine01 HAVE_IOS_NETINET_ICMP_VAR_H
+#cmakedefine01 HAVE_IOS_NETINET_TCPFSM_H
+#cmakedefine01 HAVE_IOS_NETINET_UDP_VAR_H
 #cmakedefine01 HAVE_RT_MSGHDR
 #cmakedefine01 HAVE_RT_MSGHDR2
 #cmakedefine01 HAVE_IF_MSGHDR2
@@ -88,6 +92,7 @@
 #cmakedefine01 HAVE_NET_IF_ARP_H
 #cmakedefine01 HAVE_SYS_MNTENT_H
 #cmakedefine01 HAVE_NET_IFMEDIA_H
+#cmakedefine01 HAVE_IOS_NET_IFMEDIA_H
 #cmakedefine01 HAVE_LINUX_RTNETLINK_H
 #cmakedefine01 HAVE_LINUX_CAN_H
 #cmakedefine01 HAVE_GETDOMAINNAME_SIZET

src/libraries/Native/Unix/System.Native/ios/netinet/icmp_var.h

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1982, 1986, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)icmp_var.h	8.1 (Berkeley) 6/10/93
+ * $FreeBSD: src/sys/netinet/icmp_var.h,v 1.15.2.1 2001/02/24 21:35:18 bmilekic Exp $
+ */
+
+#ifndef _NETINET_ICMP_VAR_H_
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wreserved-id-macro"
+#define _NETINET_ICMP_VAR_H_
+#pragma clang diagnostic pop
+#include <sys/appleapiopts.h>
+
+/*
+ * Variables related to this implementation
+ * of the internet control message protocol.
+ */
+struct  icmpstat {
+/* statistics related to icmp packets generated */
+	u_int32_t       icps_error;     /* # of calls to icmp_error */
+	u_int32_t       icps_oldshort;  /* no error 'cuz old ip too short */
+	u_int32_t       icps_oldicmp;   /* no error 'cuz old was icmp */
+	u_int32_t       icps_outhist[ICMP_MAXTYPE + 1];
+/* statistics related to input messages processed */
+	u_int32_t       icps_badcode;   /* icmp_code out of range */
+	u_int32_t       icps_tooshort;  /* packet < ICMP_MINLEN */
+	u_int32_t       icps_checksum;  /* bad checksum */
+	u_int32_t       icps_badlen;    /* calculated bound mismatch */
+	u_int32_t       icps_reflect;   /* number of responses */
+	u_int32_t       icps_inhist[ICMP_MAXTYPE + 1];
+	u_int32_t       icps_bmcastecho;/* b/mcast echo requests dropped */
+	u_int32_t       icps_bmcasttstamp; /* b/mcast tstamp requests dropped */
+};
+
+/*
+ * Names for ICMP sysctl objects
+ */
+#define ICMPCTL_MASKREPL        1       /* allow replies to netmask requests */
+#define ICMPCTL_STATS           2       /* statistics (read-only) */
+#define ICMPCTL_ICMPLIM         3
+#define ICMPCTL_TIMESTAMP       4       /* allow replies to time stamp requests */
+#define ICMPCTL_MAXID           5
+
+#ifdef BSD_KERNEL_PRIVATE
+#define ICMPCTL_NAMES { \
+	{ 0, 0 }, \
+	{ "maskrepl", CTLTYPE_INT }, \
+	{ "stats", CTLTYPE_STRUCT }, \
+	{ "icmplim", CTLTYPE_INT }, \
+	{ "icmptimestamp", CTLTYPE_INT }, \
+}
+
+SYSCTL_DECL(_net_inet_icmp);
+#ifdef ICMP_BANDLIM
+extern boolean_t badport_bandlim(int which);
+#endif
+#define BANDLIM_ICMP_UNREACH 0
+#define BANDLIM_ICMP_ECHO 1
+#define BANDLIM_ICMP_TSTAMP 2
+#define BANDLIM_MAX 4
+
+extern struct   icmpstat icmpstat;
+#endif /* BSD_KERNEL_PRIVATE */
+#endif /* _NETINET_ICMP_VAR_H_ */