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Test: Socket Select()

This file provides implementation of select_test(). It tests the functionality of the pj_sock_select() API.

This file is pjlib-test/select.c

/* $Id: select.c 3553 2011-05-05 06:14:19Z nanang $ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "test.h"
#if INCLUDE_SELECT_TEST
#include <pj/sock.h>
#include <pj/sock_select.h>
#include <pj/log.h>
#include <pj/string.h>
#include <pj/assert.h>
#include <pj/os.h>
#include <pj/errno.h>
enum
{
READ_FDS,
WRITE_FDS,
EXCEPT_FDS
};
#define UDP_PORT 51232
#define THIS_FILE "select_test"
/*
* do_select()
*
* Perform pj_sock_select() and find out which sockets
* are signalled.
*/
static int do_select( pj_sock_t sock1, pj_sock_t sock2,
int setcount[])
{
pj_fd_set_t fds[3];
pj_time_val timeout;
int i, n;
for (i=0; i<3; ++i) {
PJ_FD_ZERO(&fds[i]);
PJ_FD_SET(sock1, &fds[i]);
PJ_FD_SET(sock2, &fds[i]);
setcount[i] = 0;
}
timeout.sec = 1;
timeout.msec = 0;
n = pj_sock_select(PJ_IOQUEUE_MAX_HANDLES, &fds[0], &fds[1], &fds[2],
&timeout);
if (n < 0)
return n;
if (n == 0)
return 0;
for (i=0; i<3; ++i) {
if (PJ_FD_ISSET(sock1, &fds[i]))
setcount[i]++;
if (PJ_FD_ISSET(sock2, &fds[i]))
setcount[i]++;
}
return n;
}
/*
* select_test()
*
* Test main entry.
*/
int select_test()
{
pj_sockaddr_in udp_addr;
int status;
int setcount[3];
const char data[] = "hello";
const int datalen = 5;
pj_ssize_t sent, received;
char buf[10];
PJ_LOG(3, (THIS_FILE, "...Testing simple UDP select()"));
// Create two UDP sockets.
rc = pj_sock_socket( pj_AF_INET(), pj_SOCK_DGRAM(), 0, &udp1);
if (rc != PJ_SUCCESS) {
app_perror("...error: unable to create socket", rc);
status=-10; goto on_return;
}
rc = pj_sock_socket( pj_AF_INET(), pj_SOCK_DGRAM(), 0, &udp2);
if (udp2 == PJ_INVALID_SOCKET) {
app_perror("...error: unable to create socket", rc);
status=-20; goto on_return;
}
// Bind one of the UDP socket.
pj_bzero(&udp_addr, sizeof(udp_addr));
udp_addr.sin_family = pj_AF_INET();
udp_addr.sin_port = UDP_PORT;
udp_addr.sin_addr = pj_inet_addr(pj_cstr(&s, "127.0.0.1"));
if (pj_sock_bind(udp2, &udp_addr, sizeof(udp_addr))) {
status=-30; goto on_return;
}
// Send data.
sent = datalen;
rc = pj_sock_sendto(udp1, data, &sent, 0, &udp_addr, sizeof(udp_addr));
if (rc != PJ_SUCCESS || sent != datalen) {
app_perror("...error: sendto() error", rc);
status=-40; goto on_return;
}
// Sleep a bit. See http://trac.pjsip.org/repos/ticket/890
// Check that socket is marked as reable.
// Note that select() may also report that sockets are writable.
status = do_select(udp1, udp2, setcount);
if (status < 0) {
char errbuf[128];
pj_strerror(pj_get_netos_error(), errbuf, sizeof(errbuf));
PJ_LOG(1,(THIS_FILE, "...error: %s", errbuf));
status=-50; goto on_return;
}
if (status == 0) {
status=-60; goto on_return;
}
if (setcount[READ_FDS] != 1) {
status=-70; goto on_return;
}
if (setcount[WRITE_FDS] != 0) {
if (setcount[WRITE_FDS] == 2) {
PJ_LOG(3,(THIS_FILE, "...info: system reports writable sockets"));
} else {
status=-80; goto on_return;
}
} else {
PJ_LOG(3,(THIS_FILE,
"...info: system doesn't report writable sockets"));
}
if (setcount[EXCEPT_FDS] != 0) {
status=-90; goto on_return;
}
// Read the socket to clear readable sockets.
received = sizeof(buf);
rc = pj_sock_recv(udp2, buf, &received, 0);
if (rc != PJ_SUCCESS || received != 5) {
status=-100; goto on_return;
}
status = 0;
// Test timeout on the read part.
// This won't necessarily return zero, as select() may report that
// sockets are writable.
setcount[0] = setcount[1] = setcount[2] = 0;
status = do_select(udp1, udp2, setcount);
if (status != 0 && status != setcount[WRITE_FDS]) {
PJ_LOG(3,(THIS_FILE, "...error: expecting timeout but got %d sks set",
status));
PJ_LOG(3,(THIS_FILE, " rdset: %d, wrset: %d, exset: %d",
setcount[0], setcount[1], setcount[2]));
status = -110; goto on_return;
}
if (setcount[READ_FDS] != 0) {
PJ_LOG(3,(THIS_FILE, "...error: readable socket not expected"));
status = -120; goto on_return;
}
status = 0;
on_return:
if (udp1 != PJ_INVALID_SOCKET)
if (udp2 != PJ_INVALID_SOCKET)
return status;
}
#else
/* To prevent warning about "translation unit is empty"
* when this test is disabled.
*/
int dummy_select_test;
#endif /* INCLUDE_SELECT_TEST */

 


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