cmd/getent/dogetipnodes.c

	dogetipnodes.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
#ident  "%Z%%M% %I% %E% SMI"

/*
 * Copyright (c) 1994-1999, by Sun Microsystems, Inc.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <netdb.h>
#include "getent.h"

static int
puthostent(const struct hostent *hp, FILE *fp)
{
    char **p;
    int rc = 0;
    char obuf[INET6_ADDRSTRLEN];

    if (hp == NULL) {
        return (1);
    }

    for (p = hp->h_addr_list; *p != 0; p++) {
        void        *addr;
        struct in_addr  in4;
        int     af;
        const char  *res;
        char **q;

        if (hp->h_addrtype == AF_INET6) {
            if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)*p)) {
                IN6_V4MAPPED_TO_INADDR((struct in6_addr *)*p,
                            &in4);
                af = AF_INET;
                addr = &in4;
            } else {
                af = AF_INET6;
                addr = *p;
            }
        } else {
            af = AF_INET;
            addr = *p;
        }
        res = inet_ntop(af, addr, obuf, sizeof (obuf));
        if (res == 0) {
            rc = 1;
            continue;
        }
        if (fprintf(fp, "%s\t%s", res, hp->h_name) == EOF)
            rc = 1;
        for (q = hp->h_aliases; q && *q; q++) {
            if (fprintf(fp, " %s", *q) == EOF)
                rc = 1;
        }
        if (putc('\n', fp) == EOF)
            rc = 1;
    }
    return (rc);
}

/*
 * getipnodebyname/addr - get entries from ipnodes database
 */
int
dogetipnodes(const char **list)
{
    struct hostent *hp;
    int rc = EXC_SUCCESS;
    struct in6_addr in6;
    struct in_addr  in4;
    int     af, len;
    void        *addr;
    int err_ret;

    if (list == NULL || *list == NULL) {
        (void) fprintf(stdout,
                "Enumeration not supported on ipnodes\n");
    } else {
        for (; *list != NULL; list++) {
            if (strchr(*list, ':') != 0) {
                af = AF_INET6;
                len = sizeof (in6);
                addr = &in6;
            } else {
                af = AF_INET;
                len = sizeof (in4);
                addr = &in4;
            }
            if (inet_pton(af, *list, addr) == 1)
                hp = getipnodebyaddr(addr, len, af, &err_ret);
            else
                hp = getipnodebyname(
                        *list,
                        AF_INET6,
                        AI_V4MAPPED|AI_ALL,
                        &err_ret);
            if (hp == NULL)
                rc = EXC_NAME_NOT_FOUND;
            else
                (void) puthostent(hp, stdout);
        }
    }

    return (rc);
}