libslp/clib/SAAdvert.c

/*
 * 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
 */
/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * SAAdverts are used internally by libslp to discover scopes in the
 * absence of configured scopes and scopes found by active and
 * passive DA discovery. They can also be solicited by SLPFindSrv()
 * and SLPFindAttr calls with the "service:service-agent" type.
 * slp_unpackSAAdvert() unpacks a SAAdvert and returns SA info.
 */

#include <stdio.h>
#include <slp-internal.h>

SLPError slp_unpackSAAdvert(char *reply, char **surl,
                char **scopes, char **attrs) {
    SLPError err = SLP_OK;
    size_t off, len;
    /* authentication components */
    struct iovec iov[3];
    size_t tmp_off;
    int auth_cnt;
    size_t abLen = 0;

    *surl = *scopes = *attrs = NULL;

    len = slp_get_length(reply);
    off = SLP_HDRLEN + slp_get_langlen(reply);

    /* service URL */
    iov[0].iov_base = reply + off;
    tmp_off = off;
    if ((err = slp_get_string(reply, len, &off, surl)) != SLP_OK) {
        goto fail;
    }
    iov[0].iov_len = off - tmp_off;

    /* scope list */
    iov[2].iov_base = reply + off;
    tmp_off = off;
    if ((err = slp_get_string(reply, len, &off, scopes)) != SLP_OK) {
        goto fail;
    }
    iov[2].iov_len = off - tmp_off;

    /* attributes */
    iov[1].iov_base = reply + off;
    tmp_off = off;
    if ((err = slp_get_string(reply, len, &off, attrs)) != SLP_OK) {
        goto fail;
    }
    iov[1].iov_len = off - tmp_off;

    /* auth blocks */
    if ((err = slp_get_byte(reply, len, &off, &auth_cnt)) != SLP_OK) {
        goto fail;
    }
    if (slp_get_security_on() || auth_cnt > 0) {
        if ((err = slp_verify(iov, 3,
                    reply + off,
                    len - off,
                    auth_cnt,
                    &abLen)) != SLP_OK) {
        goto fail;
        }
    }

    return (SLP_OK);

fail:
    if (*surl) free(*surl);
    if (*scopes) free(*scopes);
    if (*attrs) free(*attrs);

    return (err);
}