testpoll.c

Apache 2.0.63 is the current stable version of the 2.0 series, and is recommended over any previous

/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "test_apr.h"
#include "apr_strings.h"
#include "apr_errno.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_network_io.h"
#include "apr_poll.h"

#define SMALL_NUM_SOCKETS 3
/* We can't use 64 here, because some platforms *ahem* Solaris *ahem* have
 * a default limit of 64 open file descriptors per process.  If we use
 * 64, the test will fail even though the code is correct.
 */
#define LARGE_NUM_SOCKETS 50

static apr_socket_t *s[LARGE_NUM_SOCKETS];
static apr_sockaddr_t *sa[LARGE_NUM_SOCKETS];
static apr_pollfd_t *pollarray;
static apr_pollfd_t *pollarray_large;
static apr_pollset_t *pollset;

static void make_socket(apr_socket_t **sock, apr_sockaddr_t **sa, 
                        apr_port_t port, apr_pool_t *p, CuTest *tc)
{
    apr_status_t rv;

    rv = apr_sockaddr_info_get(sa, "127.0.0.1", APR_UNSPEC, port, 0, p);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);

    rv = apr_socket_create(sock, (*sa)->family, SOCK_DGRAM, p);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);

    rv =apr_socket_bind((*sock), (*sa));
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
}

static void check_sockets(const apr_pollfd_t *pollarray, 
                          apr_socket_t **sockarray, int which, int pollin, 
                          CuTest *tc)
{
    apr_status_t rv;
    apr_int16_t event;
    char *str;

    rv = apr_poll_revents_get(&event, sockarray[which], 
                              (apr_pollfd_t *)pollarray);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    if (pollin) {
        str = apr_psprintf(p, "Socket %d not signalled when it should be",
                           which);
        CuAssert(tc, str, event & APR_POLLIN);
    } else {
        str = apr_psprintf(p, "Socket %d signalled when it should not be",
                           which);
        CuAssert(tc, str, !(event & APR_POLLIN));
    }
}

static void send_msg(apr_socket_t **sockarray, apr_sockaddr_t **sas, int which,
                     CuTest *tc)
{
    apr_size_t len = 5;
    apr_status_t rv;

    CuAssertPtrNotNull(tc, sockarray[which]);

    rv = apr_socket_sendto(sockarray[which], sas[which], 0, "hello", &len);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    CuAssertIntEquals(tc, strlen("hello"), len);
}

static void recv_msg(apr_socket_t **sockarray, int which, apr_pool_t *p, 
                     CuTest *tc)
{
    apr_size_t buflen = 5;
    char *buffer = apr_pcalloc(p, sizeof(char) * (buflen + 1));
    apr_sockaddr_t *recsa;
    apr_status_t rv;

    CuAssertPtrNotNull(tc, sockarray[which]);

    apr_sockaddr_info_get(&recsa, "127.0.0.1", APR_UNSPEC, 7770, 0, p);

    rv = apr_socket_recvfrom(recsa, sockarray[which], 0, buffer, &buflen);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    CuAssertIntEquals(tc, strlen("hello"), buflen);
    CuAssertStrEquals(tc, "hello", buffer);
}

    
static void create_all_sockets(CuTest *tc)
{
    int i;

    for (i = 0; i < LARGE_NUM_SOCKETS; i++){
        make_socket(&s[i], &sa[i], 7777 + i, p, tc);
    }
}
       
static void setup_small_poll(CuTest *tc)
{
    apr_status_t rv;
    int i;

    rv = apr_poll_setup(&pollarray, SMALL_NUM_SOCKETS, p);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    
    for (i = 0; i < SMALL_NUM_SOCKETS;i++){
        CuAssertIntEquals(tc, 0, pollarray[i].reqevents);
        CuAssertIntEquals(tc, 0, pollarray[i].rtnevents);

        rv = apr_poll_socket_add(pollarray, s[i], APR_POLLIN);
        CuAssertIntEquals(tc, APR_SUCCESS, rv);
        CuAssertPtrEquals(tc, s[i], pollarray[i].desc.s);
    }
}

static void setup_large_poll(CuTest *tc)
{
    apr_status_t rv;
    int i;

    rv = apr_poll_setup(&pollarray_large, LARGE_NUM_SOCKETS, p);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    
    for (i = 0; i < LARGE_NUM_SOCKETS;i++){
        CuAssertIntEquals(tc, 0, pollarray_large[i].reqevents);
        CuAssertIntEquals(tc, 0, pollarray_large[i].rtnevents);

        rv = apr_poll_socket_add(pollarray_large, s[i], APR_POLLIN);
        CuAssertIntEquals(tc, APR_SUCCESS, rv);
        CuAssertPtrEquals(tc, s[i], pollarray_large[i].desc.s);
    }
}

static void nomessage(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, 1, APR_STATUS_IS_TIMEUP(rv));
    check_sockets(pollarray, s, 0, 0, tc);
    check_sockets(pollarray, s, 1, 0, tc);
    check_sockets(pollarray, s, 2, 0, tc);
}

static void send_2(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    send_msg(s, sa, 2, tc);

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    check_sockets(pollarray, s, 0, 0, tc);
    check_sockets(pollarray, s, 1, 0, tc);
    check_sockets(pollarray, s, 2, 1, tc);
}

static void recv_2_send_1(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    recv_msg(s, 2, p, tc);
    send_msg(s, sa, 1, tc);

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    check_sockets(pollarray, s, 0, 0, tc);
    check_sockets(pollarray, s, 1, 1, tc);
    check_sockets(pollarray, s, 2, 0, tc);
}

static void send_2_signaled_1(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    send_msg(s, sa, 2, tc);

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    check_sockets(pollarray, s, 0, 0, tc);
    check_sockets(pollarray, s, 1, 1, tc);
    check_sockets(pollarray, s, 2, 1, tc);
}

static void recv_1_send_0(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    recv_msg(s, 1, p, tc);
    send_msg(s, sa, 0, tc);

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);
    check_sockets(pollarray, s, 0, 1, tc);
    check_sockets(pollarray, s, 1, 0, tc);
    check_sockets(pollarray, s, 2, 1, tc);
}

static void clear_all_signalled(CuTest *tc)
{
    apr_status_t rv;
    int srv = SMALL_NUM_SOCKETS;

    recv_msg(s, 0, p, tc);
    recv_msg(s, 2, p, tc);

    rv = apr_poll(pollarray, SMALL_NUM_SOCKETS, &srv, 2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, 1, APR_STATUS_IS_TIMEUP(rv));
    check_sockets(pollarray, s, 0, 0, tc);
    check_sockets(pollarray, s, 1, 0, tc);
    check_sockets(pollarray, s, 2, 0, tc);
}

static void send_large_pollarray(CuTest *tc)
{
    apr_status_t rv;
    int lrv = LARGE_NUM_SOCKETS;
    int i;

    send_msg(s, sa, LARGE_NUM_SOCKETS - 1, tc);

    rv = apr_poll(pollarray_large, LARGE_NUM_SOCKETS, &lrv, 
                  2 * APR_USEC_PER_SEC);
    CuAssertIntEquals(tc, APR_SUCCESS, rv);

    for (i = 0; i < LARGE_NUM_SOCKETS; i++) {
        if (i == (LARGE_NUM_SOCKETS - 1)) {
            check_sockets(pollarray_large, s, i, 1, tc);
        }
        else {
            check_sockets(pollarray_large, s, i, 0, tc);
        }
    }
}

static void recv_large_pollarray(CuTest *tc)
{
    apr_status_t rv;
    int lrv = LARGE_NUM_SOCKETS;
    int i;