Differential D9365 Diff 24521 usr.bin/getaddrinfo/getaddrinfo.c

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usr.bin/getaddrinfo/getaddrinfo.c

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				/* $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.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/types.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) __dead;
				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++;

				wblockUnsubmitted Done Inline Actions igor says there is empty whitespace on this line, looks like a couple of tabs. wblock: igor says there is empty whitespace on this line, looks like a couple of tabs.
				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 __dead
				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,
				__arraycount(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,
				__arraycount(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 < __arraycount(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 < __arraycount(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");
				}
				}