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/*-
 * Copyright (c) 2006 Michael Bushkov <bushman@freebsd.org>
 * All rights rehted.
 *
 * 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 AUTHOR 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 AUTHOR 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: release/9.1.0/tools/regression/lib/libc/nss/test-getaddr.c 168754 2007-04-15 11:02:31Z bushman $");

#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <assert.h>
#include <errno.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stringlist.h>
#include <unistd.h>
#include "testutil.h"

enum test_methods {
	TEST_GETADDRINFO,
	TEST_BUILD_SNAPSHOT
};

static int debug = 0;
static struct addrinfo hints;
static enum test_methods method = TEST_GETADDRINFO;

DECLARE_TEST_DATA(addrinfo)
DECLARE_TEST_FILE_SNAPSHOT(addrinfo)
DECLARE_2PASS_TEST(addrinfo)

static void clone_addrinfo(struct addrinfo *, struct addrinfo const *);
static int compare_addrinfo(struct addrinfo *, struct addrinfo *, void *);
static void dump_addrinfo(struct addrinfo *);
static void free_addrinfo(struct addrinfo *);

static void sdump_addrinfo(struct addrinfo *, char *, size_t);

IMPLEMENT_TEST_DATA(addrinfo)
IMPLEMENT_TEST_FILE_SNAPSHOT(addrinfo)
IMPLEMENT_2PASS_TEST(addrinfo)

static void 
clone_addrinfo(struct addrinfo *dest, struct addrinfo const *src)
{
	assert(dest != NULL);
	assert(src != NULL);
	
	memcpy(dest, src, sizeof(struct addrinfo));
	if (src->ai_canonname != NULL)
		dest->ai_canonname = strdup(src->ai_canonname);
	
	if (src->ai_addr != NULL) {
		dest->ai_addr = (struct sockaddr *)malloc(src->ai_addrlen);
		assert(dest->ai_addr != NULL);
		memcpy(dest->ai_addr, src->ai_addr, src->ai_addrlen);
	}
	
	if (src->ai_next != NULL) {
		dest->ai_next = (struct addrinfo *)malloc(
			sizeof(struct addrinfo));
		assert(dest->ai_next != NULL);
		clone_addrinfo(dest->ai_next, src->ai_next);
	}
}

static int
compare_addrinfo_(struct addrinfo *ai1, struct addrinfo *ai2)
{
	if ((ai1 == NULL) || (ai2 == NULL))
		return (-1);
	
	if ((ai1->ai_flags != ai2->ai_flags) ||
	    (ai1->ai_family != ai2->ai_family) ||
	    (ai1->ai_socktype != ai2->ai_socktype) ||
	    (ai1->ai_protocol != ai2->ai_protocol) ||
	    (ai1->ai_addrlen != ai2->ai_addrlen) ||
	    (((ai1->ai_addr == NULL) || (ai2->ai_addr == NULL)) &&
	    (ai1->ai_addr != ai2->ai_addr)) ||
	    (((ai1->ai_canonname == NULL) || (ai2->ai_canonname == NULL)) &&
	    (ai1->ai_canonname != ai2->ai_canonname)))
		return (-1);
	
	if ((ai1->ai_canonname != NULL) && 
		(strcmp(ai1->ai_canonname, ai2->ai_canonname) != 0))
		return (-1);
		
	if ((ai1->ai_addr != NULL) &&
		(memcmp(ai1->ai_addr, ai2->ai_addr, ai1->ai_addrlen) != 0))
		return (-1);

	if ((ai1->ai_next == NULL) && (ai2->ai_next == NULL))
		return (0);
	else
		return (compare_addrinfo_(ai1->ai_next, ai2->ai_next));
}

static int 
compare_addrinfo(struct addrinfo *ai1, struct addrinfo *ai2, void *mdata)
{
	int rv;
	
	if (debug) {
		printf("testing equality of 2 addrinfo structures\n");
	}

	rv = compare_addrinfo_(ai1, ai2);
	
	if (debug) {
		if (rv == 0)
			printf("equal\n");
		else {
			dump_addrinfo(ai1);
			dump_addrinfo(ai2);
			printf("not equal\n");
		}
	}
	
	return (rv);
}

void 
free_addrinfo(struct addrinfo *ai)
{
	if (ai == NULL)
		return;
	
	free(ai->ai_addr);
	free(ai->ai_canonname);
	free_addrinfo(ai->ai_next);
}

void
sdump_addrinfo(struct addrinfo *ai, char *buffer, size_t buflen)
{	
	int written, i;
	
	written = snprintf(buffer, buflen, "%d %d %d %d %d ",
		ai->ai_flags, ai->ai_family, ai->ai_socktype, ai->ai_protocol,
		ai->ai_addrlen);
	buffer += written;
	if (written > buflen)
		return;
	buflen -= written;
	
	written = snprintf(buffer, buflen, "%s ",
		ai->ai_canonname == NULL ? "(null)" : ai->ai_canonname);
	buffer += written;
	if (written > buflen)
		return;
	buflen -= written;
	
	if (ai->ai_addr == NULL) {
		written = snprintf(buffer, buflen, "(null)");
		buffer += written;
		if (written > buflen)
			return;
		buflen -= written;
	} else {
	    for (i = 0; i < ai->ai_addrlen; ++i ) {
		written = snprintf(buffer, buflen, 
		    i + 1 != ai->ai_addrlen ? "%d." : "%d",
				    	((unsigned char *)ai->ai_addr)[i]);
		    buffer += written;
		    if (written > buflen)
			return;
		    buflen -= written;
				
		    if (buflen == 0)
			return;
	    }		
	}
	
	if (ai->ai_next != NULL) {
		written = snprintf(buffer, buflen, ":");
		buffer += written;
		if (written > buflen)
			return;
		buflen -= written;
		
		sdump_addrinfo(ai->ai_next, buffer, buflen);
	}
}

void
dump_addrinfo(struct addrinfo *result)
{
	if (result != NULL) {
		char buffer[2048];
		sdump_addrinfo(result, buffer, sizeof(buffer));
		printf("%s\n", buffer);
	} else
		printf("(null)\n");
}

static int
addrinfo_read_snapshot_addr(char *addr, unsigned char *result, size_t len)
{
	char *s, *ps, *ts;
	
	ps = addr;
	while ( (s = strsep(&ps, ".")) != NULL) {
		if (len == 0)
			return (-1);
		
		*result = (unsigned char)strtol(s, &ts, 10);
		++result;
		if (*ts != '\0')
			return (-1);

		--len;
	}
	if (len != 0)
		return (-1);
	else
		return (0);
}

static int
addrinfo_read_snapshot_ai(struct addrinfo *ai, char *line)
{
	char *s, *ps, *ts;
	int i, rv, *pi;

	rv = 0;
	i = 0;
	ps = line;
	memset(ai, 0, sizeof(struct addrinfo));
	while ( (s = strsep(&ps, " ")) != NULL) {
		switch (i) {
			case 0:
			case 1:
			case 2:
			case 3:
				pi = &ai->ai_flags + i;
				*pi = (int)strtol(s, &ts, 10);
				if (*ts != '\0')
					goto fin;
				break;
			case 4:
				ai->ai_addrlen = (socklen_t)strtol(s, &ts, 10);				
				if (*ts != '\0')
					goto fin;
				break;
			case 5:
				if (strcmp(s, "(null)") != 0) {
					ai->ai_canonname = strdup(s);
					assert(ai->ai_canonname != NULL);
				}
				break;				
			case 6:
				if (strcmp(s, "(null)") != 0) {
				    ai->ai_addr = (struct sockaddr *)malloc(
					ai->ai_addrlen);
				    assert(ai->ai_addr != NULL);
				    memset(ai->ai_addr, 0, ai->ai_addrlen);
				    rv = addrinfo_read_snapshot_addr(s,
					(unsigned char *)ai->ai_addr,
				    	ai->ai_addrlen);
				    
				    if (rv != 0)
					goto fin;
				}
				break;
			default:
				/* NOTE: should not be reachable */
				rv = -1;
				goto fin;
		};
		
		++i;
	}

fin:
	if ((i != 7) || (rv != 0)) {		
		free_addrinfo(ai);
		memset(ai, 0, sizeof(struct addrinfo));
		return (-1);
	}
	
	return (0);	
}

static int
addrinfo_read_snapshot_func(struct addrinfo *ai, char *line)
{
	struct addrinfo *ai2;
	char *s, *ps;
	int i, rv;

	if (debug)
		printf("1 line read from snapshot:\n%s\n", line);
	
	rv = 0;
	i = 0;
	ps = line;
	
	s = strsep(&ps, ":");
	if (s == NULL)
		return (-1);
	
	rv = addrinfo_read_snapshot_ai(ai, s);
	if (rv != 0)
		return (-1);
	
	ai2 = ai;
	while ( (s = strsep(&ps, ":")) != NULL) {
		ai2->ai_next = (struct addrinfo *)malloc(
			sizeof(struct addrinfo));
		assert(ai2->ai_next != NULL);
		memset(ai2->ai_next, 0, sizeof(struct addrinfo));
			
		rv = addrinfo_read_snapshot_ai(ai2->ai_next, s);
		if (rv != 0) {
			free_addrinfo(ai);			
			return (-1);
		}

		ai2 = ai2->ai_next;		
	}

	return (0);
}

static int
addrinfo_test_correctness(struct addrinfo *ai, void *mdata)
{
	if (debug) {
		printf("testing correctness with the following data:\n");
		dump_addrinfo(ai);
	}
	
	if (ai == NULL)
		goto errfin;
	
	if (!((ai->ai_family >= 0) && (ai->ai_family < AF_MAX)))
		goto errfin;
	
	if ((ai->ai_socktype != 0) && (ai->ai_socktype != SOCK_STREAM) &&
	    (ai->ai_socktype != SOCK_DGRAM) && (ai->ai_socktype != SOCK_RAW))
		goto errfin;
	
	if ((ai->ai_protocol != 0) && (ai->ai_protocol != IPPROTO_UDP) &&
	    (ai->ai_protocol != IPPROTO_TCP))
		goto errfin;
	
	if ((ai->ai_flags & ~(AI_CANONNAME | AI_NUMERICHOST | AI_PASSIVE)) != 0)
		goto errfin;

	if ((ai->ai_addrlen != ai->ai_addr->sa_len) || 
	    (ai->ai_family != ai->ai_addr->sa_family))
		goto errfin;
	
	if (debug)
		printf("correct\n");
	
	return (0);	
errfin:
	if (debug)
		printf("incorrect\n");
	
	return (-1);
}

static int
addrinfo_read_hostlist_func(struct addrinfo *ai, char *line)
{
	struct addrinfo *result;
	int rv;	
	
	if (debug)
		printf("resolving %s: ", line);
	rv = getaddrinfo(line, NULL, &hints, &result);
	if (rv == 0) {
		if (debug)
			printf("found\n");
				
		rv = addrinfo_test_correctness(result, NULL);
		if (rv != 0) {
			freeaddrinfo(result);
			return (rv);
		}
	
		clone_addrinfo(ai, result);
		freeaddrinfo(result);
	} else {
		if (debug)
			printf("not found\n");
		
 		memset(ai, 0, sizeof(struct addrinfo));
	}
	return (0);
}

static void
usage(void)
{
	(void)fprintf(stderr,
	    "Usage: %s [-d] [-46] [-s <file]> -f <file>\n",
	    getprogname());
	exit(1);
}

int
main(int argc, char **argv)
{
	struct addrinfo_test_data td, td_snap;
	char *snapshot_file, *hostlist_file;
	int rv;
	int c;
	
	if (argc < 2)
		usage();
		
	snapshot_file = NULL;
	hostlist_file = NULL;
	memset(&hints, 0, sizeof(struct addrinfo));
	hints.ai_family = PF_UNSPEC;
	hints.ai_flags = AI_CANONNAME;
	while ((c = getopt(argc, argv, "46dns:f:")) != -1)
		switch (c) {
		case '4':
			hints.ai_family = PF_INET;
		case '6':
			hints.ai_family = PF_INET6;
			break;
		case 'd':
			debug = 1;
			break;
		case 's':
			snapshot_file = strdup(optarg);
			method = TEST_BUILD_SNAPSHOT;
			break;
		case 'f':
			hostlist_file = strdup(optarg);
			break;
		default:
			usage();
		}
	
	TEST_DATA_INIT(addrinfo, &td, clone_addrinfo, free_addrinfo);
	TEST_DATA_INIT(addrinfo, &td_snap, clone_addrinfo, free_addrinfo);
			
	if (hostlist_file == NULL)
		usage();
	
	if (access(hostlist_file, R_OK) != 0) {
		if (debug)
			printf("can't access the hostlist file %s\n",
				hostlist_file);
		
		usage();
	}
	
	if (debug)
		printf("building host lists from %s\n", hostlist_file);
	
	rv = TEST_SNAPSHOT_FILE_READ(addrinfo, hostlist_file, &td,
		addrinfo_read_hostlist_func);
	if (rv != 0)
		goto fin;
	
	if (snapshot_file != NULL) {
		if (access(snapshot_file, W_OK | R_OK) != 0) {		
			if (errno == ENOENT)
				method = TEST_BUILD_SNAPSHOT;
			else {
				if (debug)
				    printf("can't access the snapshot file %s\n",
				    snapshot_file);
			
				rv = -1;
				goto fin;
			}
		} else {
			rv = TEST_SNAPSHOT_FILE_READ(addrinfo, snapshot_file,
				&td_snap, addrinfo_read_snapshot_func);
			if (rv != 0) {
				if (debug)
					printf("error reading snapshot file\n");
				goto fin;
			}
		}
	}
		
	switch (method) {
	case TEST_GETADDRINFO:
		if (snapshot_file != NULL)
			rv = DO_2PASS_TEST(addrinfo, &td, &td_snap,
				compare_addrinfo, NULL);
		break;
	case TEST_BUILD_SNAPSHOT:
		if (snapshot_file != NULL) {
		    rv = TEST_SNAPSHOT_FILE_WRITE(addrinfo, snapshot_file, &td, 
			sdump_addrinfo);
		}
		break;
	default:
		rv = 0;
		break;
	};

fin:
	TEST_DATA_DESTROY(addrinfo, &td_snap);
	TEST_DATA_DESTROY(addrinfo, &td);
	free(hostlist_file);
	free(snapshot_file);
	return (rv);

}