From 39d8409474e3f52734dffd31658dbd242798489c Mon Sep 17 00:00:00 2001
From: Sascha Wildner <saw@online.de>
Date: Sat, 2 Jan 2021 10:39:06 +0100
Subject: [PATCH 2/2] Bring in getaddrinfo(1) from FreeBSD.

---
 usr.bin/Makefile                  |   1 +
 usr.bin/getaddrinfo/Makefile      |  16 ++
 usr.bin/getaddrinfo/getaddrinfo.1 | 180 ++++++++++++++++
 usr.bin/getaddrinfo/getaddrinfo.c | 330 ++++++++++++++++++++++++++++++
 usr.bin/getaddrinfo/tables.awk    |  63 ++++++
 5 files changed, 590 insertions(+)
 create mode 100644 usr.bin/getaddrinfo/Makefile
 create mode 100644 usr.bin/getaddrinfo/getaddrinfo.1
 create mode 100644 usr.bin/getaddrinfo/getaddrinfo.c
 create mode 100644 usr.bin/getaddrinfo/tables.awk

diff --git a/usr.bin/Makefile b/usr.bin/Makefile
index eda35247e03..73e890be994 100644
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -70,6 +70,7 @@ SUBDIR=	alias \
 	ftp \
 	gcore \
 	gencat \
+	getaddrinfo \
 	getconf \
 	getent \
 	getopt \
diff --git a/usr.bin/getaddrinfo/Makefile b/usr.bin/getaddrinfo/Makefile
new file mode 100644
index 00000000000..43672433672
--- /dev/null
+++ b/usr.bin/getaddrinfo/Makefile
@@ -0,0 +1,16 @@
+#	$NetBSD: Makefile,v 1.2 2014/04/29 01:21:02 christos Exp $
+#	$FreeBSD: head/usr.bin/getaddrinfo/Makefile 317385 2017-04-24 21:31:27Z brooks $
+
+PROG=	getaddrinfo
+SRCS=	getaddrinfo.c tables.h
+
+LDADD+=-lutil
+DPADD+=${LIBUTIL}
+
+SYS_SOCKET_H?=	${.CURDIR}/../../sys/sys/socket.h
+
+CFLAGS+=	-I${.OBJDIR}
+CLEANFILES+=	tables.h
+tables.h: tables.awk ${SYS_SOCKET_H}
+	LC_ALL=C awk -f ${.ALLSRC} > ${.TARGET}
+.include <bsd.prog.mk>
diff --git a/usr.bin/getaddrinfo/getaddrinfo.1 b/usr.bin/getaddrinfo/getaddrinfo.1
new file mode 100644
index 00000000000..64caf87c5a0
--- /dev/null
+++ b/usr.bin/getaddrinfo/getaddrinfo.1
@@ -0,0 +1,180 @@
+.\"	$FreeBSD: head/usr.bin/getaddrinfo/getaddrinfo.1 315640 2017-03-20 16:44:55Z vangyzen $
+.\"	$NetBSD: getaddrinfo.1,v 1.5 2014/04/22 06:02:06 wiz Exp $
+.\"
+.\" Copyright (c) 2013 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This documentation is derived from text contributed to The NetBSD
+.\" Foundation by Taylor R. Campbell.
+.\"
+.\" 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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd March 20, 2017
+.Dt GETADDRINFO 1
+.Os
+.Sh NAME
+.Nm getaddrinfo
+.Nd resolve names to socket addresses
+.Sh SYNOPSIS
+.Nm
+.Op Fl cNnP
+.Op Fl f Ar family
+.Op Fl p Ar protocol
+.Op Fl s Ar service Ns Op Ns / Ns Ar protocol
+.Op Fl t Ar socktype
+.Op Ar hostname
+.Sh DESCRIPTION
+The
+.Nm
+utility resolves host and service names to socket addresses with
+.Xr getaddrinfo 3
+and prints them to standard output in a user-friendly format.
+.Pp
+The output is a sequence of lines with space-separated fields:
+.Pp
+.Dl socket-type address-family protocol [af-specific data ...]
+.Pp
+For the
+.Dq inet
+and
+.Dq inet6
+address families, the af-specific data are the IP/IPv6 address and port
+number.
+.Pp
+Depending on the settings in
+.Xr nsswitch.conf 5 ,
+.Nm
+might query DNS for answers.
+However, it is not intended to be a general-purpose DNS query utility.
+Use
+.Xr drill 1
+for that.
+.Pp
+These options are available:
+.Bl -tag -width Ds
+.It Fl c
+Look up a canonical name as if with the
+.Dv AI_CANONNAME
+flag to
+.Xr getaddrinfo 3
+and print it on the first line before the socket addresses.
+.It Fl f Ar family
+Specify an address family.
+Address families are named like the
+.Dv AF_...
+constants for address family numbers in the
+.Aq Pa sys/socket.h
+header file but without the
+.Dv AF_
+prefix and lowercase.
+For example,
+.Dq inet
+corresponds with
+.Dv AF_INET .
+.It Fl N
+Treat the service as numeric and do not attempt service name
+resolution, as if with the
+.Dv AI_NUMERICSERV
+flag to
+.Xr getaddrinfo 3 .
+.It Fl n
+Treat the hostname as a numeric address and do not attempt name
+resolution, as if with the
+.Dv AI_NUMERICHOST
+flag to
+.Xr getaddrinfo 3 .
+.It Fl P
+Return socket addresses intended for use with
+.Xr bind 2 ,
+as if with the
+.Dv AI_PASSIVE
+flag to
+.Xr getaddrinfo 3 .
+By default, the socket addresses are intended for use with
+.Xr connect 2 ,
+.Xr sendto 2 ,
+or
+.Xr sendmsg 2 .
+.It Fl p Ar protocol
+Specify a protocol.
+Protocols are numeric or symbolic as listed in
+.Xr protocols 5 .
+.It Fl s Ar service Ns Op Ns / Ns Ar protocol
+Specify a service to look up.
+Services are symbolic or numeric with an optional
+protocol suffix as listed in
+.Xr services 5 .
+If a service is not specified, a hostname is required.
+.It Fl t Ar socktype
+Specify a socket type.
+Socket types are named like the
+.Dv SOCK_...
+constants for socket type numbers in the
+.Aq Pa sys/socket.h
+header file but without the
+.Dv SOCK_
+prefix and lowercase.
+For example,
+.Dq dgram
+corresponds with
+.Dv SOCK_DGRAM .
+.El
+.Sh EXIT STATUS
+.Ex -std getaddrinfo
+.Sh EXAMPLES
+Look up
+.Dq www.NetBSD.org :
+.Bd -literal -offset indent
+$ getaddrinfo www.NetBSD.org
+dgram inet6 udp 2001:4f8:3:7:2e0:81ff:fe52:9ab6 0
+dgram inet udp 149.20.53.67 0
+stream inet6 tcp 2001:4f8:3:7:2e0:81ff:fe52:9ab6 0
+stream inet tcp 149.20.53.67 0
+.Ed
+.Pp
+The port number here is zero because no service was specified.
+.Pp
+Look up
+.Dq morden.NetBSD.org
+for stream sockets on port 80, and show the canonical name:
+.Bd -literal -offset indent
+$ getaddrinfo -c -t stream -s 80 morden.NetBSD.org
+canonname ftp.NetBSD.org
+stream inet6 tcp 2001:470:1f05:3d::21 80
+stream inet tcp 199.233.217.249 80
+.Ed
+.Sh SEE ALSO
+.Xr drill 1 ,
+.Xr getent 1 ,
+.Xr getaddrinfo 3 ,
+.Xr getnameinfo 3 ,
+.Xr resolver 3 ,
+.Xr hosts 5 ,
+.Xr nsswitch.conf 5 ,
+.Xr protocols 5 ,
+.Xr resolv.conf 5 ,
+.Xr services 5
+.Sh HISTORY
+The
+.Nm
+command first appeared in
+.Nx 7.0 .
diff --git a/usr.bin/getaddrinfo/getaddrinfo.c b/usr.bin/getaddrinfo/getaddrinfo.c
new file mode 100644
index 00000000000..fb1944c3d44
--- /dev/null
+++ b/usr.bin/getaddrinfo/getaddrinfo.c
@@ -0,0 +1,330 @@
+/*	$NetBSD: getaddrinfo.c,v 1.4 2014/04/22 02:23:03 ginsbach Exp $	*/
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ *
+ * $FreeBSD: head/usr.bin/getaddrinfo/getaddrinfo.c 315640 2017-03-20 16:44:55Z vangyzen $
+ */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <netdb.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <util.h>
+
+#include "tables.h"
+
+static void	usage(void) __dead2;
+static void	printaddrinfo(struct addrinfo *);
+static bool	parse_af(const char *, int *);
+static bool	parse_protocol(const char *, int *);
+static bool	parse_socktype(const char *, int *);
+static bool	parse_numeric_tabular(const char *, int *, const char *const *,
+		    size_t);
+
+int
+main(int argc, char **argv)
+{
+	static const struct addrinfo zero_addrinfo;
+	struct addrinfo hints = zero_addrinfo;
+	struct addrinfo *addrinfo;
+	const char *hostname = NULL, *service = NULL;
+	int ch;
+	int error;
+
+	setprogname(argv[0]);
+
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = 0;
+	hints.ai_protocol = 0;
+	hints.ai_flags = 0;
+
+	while ((ch = getopt(argc, argv, "cf:nNp:Ps:t:")) != -1) {
+		switch (ch) {
+		case 'c':
+			hints.ai_flags |= AI_CANONNAME;
+			break;
+
+		case 'f':
+			if (!parse_af(optarg, &hints.ai_family)) {
+				warnx("invalid address family: %s", optarg);
+				usage();
+			}
+			break;
+
+		case 'n':
+			hints.ai_flags |= AI_NUMERICHOST;
+			break;
+
+		case 'N':
+			hints.ai_flags |= AI_NUMERICSERV;
+			break;
+
+		case 's':
+			service = optarg;
+			break;
+
+		case 'p':
+			if (!parse_protocol(optarg, &hints.ai_protocol)) {
+				warnx("invalid protocol: %s", optarg);
+				usage();
+			}
+			break;
+
+		case 'P':
+			hints.ai_flags |= AI_PASSIVE;
+			break;
+
+		case 't':
+			if (!parse_socktype(optarg, &hints.ai_socktype)) {
+				warnx("invalid socket type: %s", optarg);
+				usage();
+			}
+			break;
+
+		case '?':
+		default:
+			usage();
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (!((argc == 1) || ((argc == 0) && (hints.ai_flags & AI_PASSIVE))))
+		usage();
+	if (argc == 1)
+		hostname = argv[0];
+
+	if (service != NULL) {
+		char *p;
+
+		if ((p = strchr(service, '/')) != NULL) {
+			if (hints.ai_protocol != 0) {
+				warnx("protocol already specified");
+				usage();
+			}
+			*p = '\0';
+			p++;
+
+			if (!parse_protocol(p, &hints.ai_protocol)) {
+				warnx("invalid protocol: %s", p);
+				usage();
+			}
+		}
+	}
+
+	error = getaddrinfo(hostname, service, &hints, &addrinfo);
+	if (error)
+		errx(1, "%s", gai_strerror(error));
+
+	if ((hints.ai_flags & AI_CANONNAME) && (addrinfo != NULL)) {
+		if (printf("canonname %s\n", addrinfo->ai_canonname) < 0)
+			err(1, "printf");
+	}
+
+	printaddrinfo(addrinfo);
+
+	freeaddrinfo(addrinfo);
+
+	return 0;
+}
+
+static void __dead2
+usage(void)
+{
+
+	(void)fprintf(stderr, "Usage: %s", getprogname());
+	(void)fprintf(stderr,
+	    " [-f <family>] [-p <protocol>] [-t <socktype>] [-s <service>]\n");
+	(void)fprintf(stderr, "   [-cnNP] [<hostname>]\n");
+	exit(1);
+}
+
+static bool
+parse_af(const char *string, int *afp)
+{
+
+	return parse_numeric_tabular(string, afp, address_families,
+	    NELEM(address_families));
+}
+
+static bool
+parse_protocol(const char *string, int *protop)
+{
+	struct protoent *protoent;
+	char *end;
+	long value;
+
+	errno = 0;
+	value = strtol(string, &end, 0);
+	if ((string[0] == '\0') || (*end != '\0'))
+		goto numeric_failed;
+	if ((errno == ERANGE) && ((value == LONG_MAX) || (value == LONG_MIN)))
+		goto numeric_failed;
+	if ((value > INT_MAX) || (value < INT_MIN))
+		goto numeric_failed;
+
+	*protop = value;
+	return true;
+
+numeric_failed:
+	protoent = getprotobyname(string);
+	if (protoent == NULL)
+		goto protoent_failed;
+
+	*protop = protoent->p_proto;
+	return true;
+
+protoent_failed:
+	return false;
+}
+
+static bool
+parse_socktype(const char *string, int *typep)
+{
+
+	return parse_numeric_tabular(string, typep, socket_types,
+	    NELEM(socket_types));
+}
+
+static bool
+parse_numeric_tabular(const char *string, int *valuep,
+    const char *const *table, size_t n)
+{
+	char *end;
+	long value;
+	size_t i;
+
+	assert((uintmax_t)n <= (uintmax_t)INT_MAX);
+
+	errno = 0;
+	value = strtol(string, &end, 0);
+	if ((string[0] == '\0') || (*end != '\0'))
+		goto numeric_failed;
+	if ((errno == ERANGE) && ((value == LONG_MAX) || (value == LONG_MIN)))
+		goto numeric_failed;
+	if ((value > INT_MAX) || (value < INT_MIN))
+		goto numeric_failed;
+
+	*valuep = value;
+	return true;
+
+numeric_failed:
+	for (i = 0; i < n; i++)
+		if ((table[i] != NULL) && (strcmp(string, table[i]) == 0))
+			break;
+	if (i == n)
+		goto table_failed;
+	*valuep = i;
+	return true;
+
+table_failed:
+	return false;
+}
+
+static void
+printaddrinfo(struct addrinfo *addrinfo)
+{
+	struct addrinfo *ai;
+	char buf[1024];
+	int n;
+	struct protoent *protoent;
+
+	for (ai = addrinfo; ai != NULL; ai = ai->ai_next) {
+		/* Print the socket type.  */
+		if ((ai->ai_socktype >= 0) &&
+		    ((size_t)ai->ai_socktype < NELEM(socket_types)) &&
+		    (socket_types[ai->ai_socktype] != NULL))
+			n = printf("%s", socket_types[ai->ai_socktype]);
+		else
+			n = printf("%d", ai->ai_socktype);
+		if (n < 0)
+			err(1, "printf");
+
+		/* Print the address family.  */
+		if ((ai->ai_family >= 0) &&
+		    ((size_t)ai->ai_family < NELEM(address_families)) &&
+		    (address_families[ai->ai_family] != NULL))
+			n = printf(" %s", address_families[ai->ai_family]);
+		else
+			n = printf(" %d", ai->ai_family);
+		if (n < 0)
+			err(1, "printf");
+
+		/* Print the protocol number.  */
+		protoent = getprotobynumber(ai->ai_protocol);
+		if (protoent == NULL)
+			n = printf(" %d", ai->ai_protocol);
+		else
+			n = printf(" %s", protoent->p_name);
+		if (n < 0)
+			err(1, "printf");
+
+		/* Format the sockaddr.  */
+		switch (ai->ai_family) {
+		case AF_INET:
+		case AF_INET6:
+			n = sockaddr_snprintf(buf, sizeof(buf), " %a %p",
+			    ai->ai_addr);
+			break;
+
+		default:
+			n = sockaddr_snprintf(buf, sizeof(buf),
+			    "%a %p %I %F %R %S", ai->ai_addr);
+		}
+
+		/*
+		 * Check for sockaddr_snprintf failure.
+		 *
+		 * XXX sockaddr_snprintf's error reporting is botched
+		 * -- man page says it sets errno, but if getnameinfo
+		 * fails, errno is not where it reports the error...
+		 */
+		if (n < 0) {
+			warnx("sockaddr_snprintf failed");
+			continue;
+		}
+		if (sizeof(buf) <= (size_t)n)
+			warnx("truncated sockaddr_snprintf output");
+
+		/* Print the formatted sockaddr.  */
+		if (printf("%s\n", buf) < 0)
+			err(1, "printf");
+	}
+}
diff --git a/usr.bin/getaddrinfo/tables.awk b/usr.bin/getaddrinfo/tables.awk
new file mode 100644
index 00000000000..ed4b7c2850a
--- /dev/null
+++ b/usr.bin/getaddrinfo/tables.awk
@@ -0,0 +1,63 @@
+#!/usr/bin/awk -f
+
+#	$FreeBSD: head/usr.bin/getaddrinfo/tables.awk 315640 2017-03-20 16:44:55Z vangyzen $
+#	$NetBSD: tables.awk,v 1.2 2014/02/27 01:17:13 ginsbach Exp $
+
+# Copyright (c) 2013 The NetBSD Foundation, Inc.
+# All rights reserved.
+#
+# This code is derived from software contributed to The NetBSD Foundation
+# by Taylor R. Campbell.
+#
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+
+BEGIN {
+	n_afs = 0
+	n_socktypes = 0
+}
+
+!(($1 == "#define") && ($3 ~ /^[0-9]*$/)) {
+	next
+}
+
+($2 ~ /^AF_[A-Z0-9_]*$/) && ($2 != "AF_MAX") {
+	afs[n_afs++] = substr($2, 4)
+}
+
+($2 ~ /^SOCK_[A-Z0-9_]*$/) && ($2 != "SOCK_MAXADDRLEN") {
+	socktypes[n_socktypes++] = substr($2, 6)
+}
+
+END {
+	printf("/* Do not edit!  This file was generated automagically! */\n");
+
+	printf("\nstatic const char *const address_families[] = {\n");
+	for (i = 0; i < n_afs; i++)
+		printf("\t[AF_%s] = \"%s\",\n", afs[i], tolower(afs[i]));
+	printf("};\n");
+
+	printf("\nstatic const char *const socket_types[] = {\n");
+	for (i = 0; i < n_socktypes; i++)
+		printf("\t[SOCK_%s] = \"%s\",\n", socktypes[i],
+		    tolower(socktypes[i]));
+	printf("};\n");
+}
-- 
2.28.0

