From: [EMAIL PROTECTED]
Operating system: FreeBSD 4.0
PHP version: 4.0.4
PHP Bug Type: Sockets related
Bug description: read() on udp-sockets fails
<?
$port=7;
$ip="127.0.0.1";
$sock=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
$retval=connect($sock,$ip,$port);
write($sock,"blaat\n",6);
$numread=read($sock,&$readdata,1);
printf("%d %02x %s\n",$numread,ord($readdata),$readdata);
close($sock);
?>
When changing the 1 on read() to a different number, or when calling it multiple
times, the read() function hangs due to an unknown reason (at least for me). This
example tries to read from the echo-service, I encountered the problem when developing
a radius-client in PHP.
This is the stack of the process:
#0 0x2825b794 in read () from /usr/lib/libc.so.4
#1 0x809dd78 in php_read (fd=4, buf=0x81e512c, maxlen=2) at sockets.c:640
#2 0x809df38 in php_if_read (ht=3, return_value=0x821768c, this_ptr=0x0,
return_value_used=1) at sockets.c:692
#3 0x81121bc in execute (op_array=0x820948c) at ./zend_execute.c:1519
#4 0x80ea45b in zend_execute_scripts (type=8, file_count=3) at zend.c:729
#5 0x807c360 in php_execute_script (primary_file=0xbfbff408) at main.c:1221
#6 0x80f5eda in apache_php_module_main (r=0x821b034, display_source_mode=0)
at sapi_apache.c:89
#7 0x8079cda in send_php ()
#8 0x8079d12 in send_parsed_php ()
#9 0x811c7f5 in ap_invoke_handler ()
#10 0x8130850 in process_request_internal ()
#11 0x81308ba in ap_process_request ()
#12 0x8127b2b in child_main ()
#13 0x8127db0 in make_child ()
#14 0x8128134 in perform_idle_server_maintenance ()
#15 0x8128659 in standalone_main ()
#16 0x8128c88 in main ()
#17 0x8062801 in _start ()
and info on the first two frames:
(gdb) up
#1 0x809dd78 in php_read (fd=4, buf=0x81e512c, maxlen=2) at sockets.c:640
640 m = read(fd, (void *) t, 1);
(gdb) info locals
t = 0x81e512d "laat"
m = 1
n = 1
no_read = 1
nonblock = 0
(gdb) up
#2 0x809df38 in php_if_read (ht=3, return_value=0x821768c, this_ptr=0x0,
return_value_used=1) at sockets.c:692
(gdb) info locals
ht = 136204588
return_value = (zval *) 0x821768c
fd = (zval **) 0x8216c0c
buf = (zval **) 0x8216c10
length = (zval **) 0x8216c14
binary = (zval **) 0x78b740
tmpbuf = 0x81e512c "blaat"
ret = 134864068
read_function = (int (*)()) 0x809dcc4 <php_read>
configure is ran with:
Configure Command './configure' '--with-apache=../apache_1.3.12' '--enable-track-vars'
'--with-ndbm' '--with-db' '--with-mysql' '--enable-sockets'
If you need more information, feel free to ask me.
Edwin
--
Edit Bug report at: http://bugs.php.net/?id=8761&edit=1
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