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/*
* Copyright (c) 2009 Mark Heily <mark@heily.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <arpa/inet.h>
#include <sys/socket.h>
#include "common.h"
static int __thread kqfd;
static int __thread sockfd[2];
static void
kevent_socket_drain(void)
{
char buf[1];
/* Drain the read buffer, then make sure there are no more events. */
if (read(sockfd[0], &buf[0], 1) < 1)
die("read(2)");
}
static void
kevent_socket_fill(void)
{
if (write(sockfd[1], ".", 1) < 1)
die("write(2)");
}
void
test_kevent_socket_add(void)
{
struct kevent kev;
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_ADD, 0, 0, &sockfd[0]);
}
void
test_kevent_socket_add_without_ev_add(void)
{
struct kevent kev;
/* Try to add a kevent without specifying EV_ADD */
EV_SET(&kev, sockfd[0], EVFILT_READ, 0, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) == 0)
die("kevent should have failed");
kevent_socket_fill();
test_no_kevents(kqfd);
kevent_socket_drain();
/* Try to delete a kevent which does not exist */
kev.flags = EV_DELETE;
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) == 0)
die("kevent should have failed");
}
void
test_kevent_socket_get(void)
{
struct kevent kev;
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_ADD, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
kevent_socket_fill();
kev.data = 1;
kevent_cmp(&kev, kevent_get(kqfd));
kevent_socket_drain();
test_no_kevents(kqfd);
kev.flags = EV_DELETE;
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
}
void
test_kevent_socket_clear(void)
{
struct kevent kev;
test_no_kevents(kqfd);
kevent_socket_drain();
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
kevent_socket_fill();
kevent_socket_fill();
kev.data = 2;
kevent_cmp(&kev, kevent_get(kqfd));
/* We filled twice, but drain once. Edge-triggered would not generate
additional events.
*/
kevent_socket_drain();
test_no_kevents(kqfd);
kevent_socket_drain();
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_DELETE, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
}
void
test_kevent_socket_disable_and_enable(void)
{
struct kevent kev;
/* Add an event, then disable it. */
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_ADD, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_DISABLE, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
kevent_socket_fill();
test_no_kevents(kqfd);
/* Re-enable the knote, then see if an event is generated */
kev.flags = EV_ENABLE;
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
kev.flags = EV_ADD;
kev.data = 1;
kevent_cmp(&kev, kevent_get(kqfd));
kevent_socket_drain();
kev.flags = EV_DELETE;
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
}
void
test_kevent_socket_del(void)
{
struct kevent kev;
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_DELETE, 0, 0, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("kevent");
kevent_socket_fill();
test_no_kevents(kqfd);
kevent_socket_drain();
}
void
test_kevent_socket_oneshot(void)
{
struct kevent kev;
/* Re-add the watch and make sure no events are pending */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_ADD | EV_ONESHOT, 0, 0, &sockfd[0]);
test_no_kevents(kqfd);
kevent_socket_fill();
kev.data = 1;
kevent_cmp(&kev, kevent_get(kqfd));
test_no_kevents(kqfd);
/* Verify that the event has been deleted */
kevent_socket_fill();
test_no_kevents(kqfd);
kevent_socket_drain();
}
/*
* Test if the data field returns 1 when a listen(2) socket has
* a pending connection.
*/
void
test_kevent_socket_listen_backlog(void)
{
struct kevent kev;
struct sockaddr_in sain;
socklen_t sa_len = sizeof(sain);
int one = 1;
const short port = 14973;
int clnt, srvr;
/* Create a passive socket */
memset(&sain, 0, sizeof(sain));
sain.sin_family = AF_INET;
sain.sin_port = htons(port);
if ((srvr = socket(PF_INET, SOCK_STREAM, 0)) < 0) abort();
if (setsockopt(srvr, SOL_SOCKET, SO_REUSEADDR,
(char *) &one, sizeof(one)) != 0) abort();
if (bind(srvr, (struct sockaddr *) &sain, sa_len) < 0) abort();
if (listen(srvr, 100) < 0) abort();
/* Watch for events on the socket */
test_no_kevents(kqfd);
kevent_add(kqfd, &kev, srvr, EVFILT_READ, EV_ADD | EV_ONESHOT, 0, 0, NULL);
test_no_kevents(kqfd);
/* Simulate a client connecting to the server */
sain.sin_family = AF_INET;
sain.sin_port = htons(port);
sain.sin_addr.s_addr = inet_addr("127.0.0.1");
if ((clnt = socket(AF_INET, SOCK_STREAM, 0)) < 0) abort();
if (connect(clnt, (struct sockaddr *) &sain, sa_len) < 0) abort();
/* Verify that data=1 */
kev.data = 1;
kevent_cmp(&kev, kevent_get(kqfd));
test_no_kevents(kqfd);
}
#if HAVE_EV_DISPATCH
void
test_kevent_socket_dispatch(void)
{
struct kevent kev;
/* Re-add the watch and make sure no events are pending */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_ADD | EV_DISPATCH, 0, 0, &sockfd[0]);
test_no_kevents(kqfd);
/* The event will occur only once, even though EV_CLEAR is not
specified. */
kevent_socket_fill();
kev.data = 1;
kevent_cmp(&kev, kevent_get(kqfd));
test_no_kevents(kqfd);
/* Re-enable the kevent */
/* FIXME- is EV_DISPATCH needed when rearming ? */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_ENABLE | EV_DISPATCH, 0, 0, &sockfd[0]);
kev.data = 1;
kev.flags = EV_ADD | EV_DISPATCH; /* FIXME: may not be portable */
kevent_cmp(&kev, kevent_get(kqfd));
test_no_kevents(kqfd);
/* Since the knote is disabled, the EV_DELETE operation succeeds. */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_DELETE, 0, 0, &sockfd[0]);
kevent_socket_drain();
}
#endif /* HAVE_EV_DISPATCH */
#if BROKEN_ON_LINUX
void
test_kevent_socket_lowat(void)
{
struct kevent kev;
test_begin(test_id);
/* Re-add the watch and make sure no events are pending */
puts("-- re-adding knote, setting low watermark to 2 bytes");
EV_SET(&kev, sockfd[0], EVFILT_READ, EV_ADD | EV_ONESHOT, NOTE_LOWAT, 2, &sockfd[0]);
if (kevent(kqfd, &kev, 1, NULL, 0, NULL) < 0)
die("%s", test_id);
test_no_kevents();
puts("-- checking that one byte does not trigger an event..");
kevent_socket_fill();
test_no_kevents();
puts("-- checking that two bytes triggers an event..");
kevent_socket_fill();
if (kevent(kqfd, NULL, 0, &kev, 1, NULL) != 1)
die("%s", test_id);
KEV_CMP(kev, sockfd[0], EVFILT_READ, 0);
test_no_kevents();
kevent_socket_drain();
kevent_socket_drain();
}
#endif
void
test_kevent_socket_eof(void)
{
struct kevent kev;
/* Re-add the watch and make sure no events are pending */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_ADD, 0, 0, &sockfd[0]);
test_no_kevents(kqfd);
if (close(sockfd[1]) < 0)
die("close(2)");
kev.flags |= EV_EOF;
kevent_cmp(&kev, kevent_get(kqfd));
/* Delete the watch */
kevent_add(kqfd, &kev, sockfd[0], EVFILT_READ, EV_DELETE, 0, 0, &sockfd[0]);
}
void
test_evfilt_read(int _kqfd)
{
/* Create a connected pair of full-duplex sockets for testing socket events */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockfd) < 0)
die("socketpair");
kqfd = _kqfd;
test(kevent_socket_add);
test(kevent_socket_del);
test(kevent_socket_add_without_ev_add);
test(kevent_socket_get);
test(kevent_socket_disable_and_enable);
test(kevent_socket_oneshot);
test(kevent_socket_clear);
#if HAVE_EV_DISPATCH
test(kevent_socket_dispatch);
#endif
test(kevent_socket_listen_backlog);
test(kevent_socket_eof);
close(sockfd[0]);
close(sockfd[1]);
}
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