[Bug libc/345] New: getsockname returns a value different of zero when successful

[Bug libc/345] New: getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

When calling the function getsockname, errno shows Successful, but the value
returned is not zero, but different instead.

I have tested this on versions 2.3.2 (Debian) and 2.3.4 (Gentoo) with that
behaviour.

>From man 2 getsockname:

NAME
       getsockname - get socket name

SYNOPSIS
       #include <sys/socket.h>

       int getsockname(int s, struct sockaddr *name, socklen_t *namelen);

DESCRIPTION
       Getsockname  returns  the  current  name for the specified socket.  The
       namelen parameter should be initialized to indicate the amount of space
       pointed  to by name.  On return it contains the actual size of the name
       returned (in bytes).

RETURN VALUE
       On success, zero is returned.  On error, -1 is returned, and  errno  is
       set appropriately.

-- 
           Summary: getsockname returns a value different of zero when
                    successful
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P1
         Component: libc
        AssignedTo: gotom at debian dot or dot jp
        ReportedBy: aioannis at tinet dot org
                CC: glibc-bugs at sources dot redhat dot com


http://sources.redhat.com/bugzilla/show_bug.cgi?id=345

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[Bug libc/345] getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

------- Additional Comments From aioannis at tinet dot org  2004-08-25 16:18 -------
Created an attachment (id=175)
 --> (http://sources.redhat.com/bugzilla/attachment.cgi?id=175&action=view)
This is the headers file for gso.cpp


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[Bug libc/345] getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

------- Additional Comments From aioannis at tinet dot org  2004-08-25 16:18 -------
Created an attachment (id=174)
 --> (http://sources.redhat.com/bugzilla/attachment.cgi?id=174&action=view)
This is a sample source code that reproduces the bug (requires the header file)

I add a sample source code that reproduces the bug:

gso.cpp and gso.h

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[Bug libc/345] getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

------- Additional Comments From aioannis at tinet dot org  2004-08-25 16:27 -------
This behaviour described for getsockname also happens for the getpeername()
function, which returns a value different from zero when successful.


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[Bug libc/345] getsockname returns a value different of zero when successful

[jakub at redhat dot com]

------- Additional Comments From jakub at redhat dot com  2004-08-29 19:44 -------
I certainly can't reproduce this, neither on IA-32 nor x86-64.
Please write what exact arguments you call the test with, run it under
strace and show its output and what kernel you're using.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


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[Bug libc/345] getsockname returns a value different of zero when successful

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2004-09-12 05:49 -------
getsockname in glibc is nothing but a syscall wrapper.  If you have a problem,
this is a problem in the kernel.  Report the bug appropriately.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |WORKSFORME


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[Bug libc/345] getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

------- Additional Comments From aioannis at tinet dot org  2004-09-13 15:56 -------
Sent to kernel.org: http://bugzilla.kernel.org/show_bug.cgi?id=3387

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |VERIFIED


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[Bug libc/345] getsockname returns a value different of zero when successful

[aioannis at tinet dot org]

------- Additional Comments From aioannis at tinet dot org  2004-09-21 10:35 -------
kernel.org refused to solve this bug, arguing it's a glibc issue:

------- Additional Comment #3 From Hideaki YOSHIFUJI 2004-09-21 00:47 ------- 
Kernel is not responsible to errno, but glibc is;
it should setup errno appropriately returned from syscall.


------- Additional Comment #4 From Hideaki YOSHIFUJI 2004-09-21 00:48 ------- 
Please report this to the appropriate community (glibc).


See bug: http://bugme.osdl.org/show_bug.cgi?id=3387 for additional info.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|VERIFIED                    |REOPENED
         Resolution|WORKSFORME                  |


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[Bug libc/345] getsockname returns a value different of zero when successful

[deathwing00 at forums dot gentoo dot org]

------- Additional Comments From deathwing00 at forums dot gentoo dot org  2004-09-21 14:10 -------
Oops. I saw your comment.
After modifying my code a bit more (with the source I provided you) I got this:

ioannis@petekan gso $ ./gso www.google.com 80
gethostname         OK
socket              OK
connect             OK
getsockname         Success
getsockname: 10.30.102.123:56575
getpeername         Success
getpeername: 66.102.9.104:80
EXITING

Should have done that from the begining.

In the code:

	if(getpeername(SocketDesc,(sockaddr *)&gsoSA,&gsoSL))
	{
		cout << strerror(errno) << endl;
		return -4;
	}

If the returned value is zero, the statement is false, so it won't exit. I 
still don't understand why it failed in the previous code. Anyway. Now I have 
my app up and running.

Thanks for the time.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |WORKSFORME


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[Bug libc/345] getsockname returns a value different of zero when successful

[jakub at redhat dot com]

------- Additional Comments From jakub at redhat dot com  2004-09-21 14:05 -------
Still doesn't fail.
strace -e getsockname /tmp/gso2 www.google.com 80; echo $?
gethostname         OK
socket              OK
connect             OK
getsockname(3, {sa_family=AF_INET, sin_port=htons(33139),
sin_addr=inet_addr("195.113.19.62")}, [22560191895568400]) = 0
getsockname         Success
getsockname: 195.113.19.62:33139
getpeername         Success
getpeername: 216.239.59.147:80
EXITING
0


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[Bug libc/345] getsockname returns a value different of zero when successful

[deathwing00 at forums dot gentoo dot org]

------- Additional Comments From deathwing00 at forums dot gentoo dot org  2004-09-21 14:02 -------
Created an attachment (id=197)
 --> (http://sources.redhat.com/bugzilla/attachment.cgi?id=197&action=view)
Updated version.


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           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #175 is|0                           |1
           obsolete|                            |


http://sources.redhat.com/bugzilla/show_bug.cgi?id=345

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[Bug libc/345] getsockname returns a value different of zero when successful

[deathwing00 at forums dot gentoo dot org]

------- Additional Comments From deathwing00 at forums dot gentoo dot org  2004-09-21 14:01 -------
Created an attachment (id=196)
 --> (http://sources.redhat.com/bugzilla/attachment.cgi?id=196&action=view)
Updated version.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #174 is|0                           |1
           obsolete|                            |


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[Bug libc/345] getsockname returns a value different of zero when successful

[jakub at redhat dot com]

------- Additional Comments From jakub at redhat dot com  2004-09-21 13:38 -------
/tmp/gso www.google.com 80; echo $?
gethostname         OK
socket              OK
connect             OK
getsockname         Success
EXITING
0
strace -e getsockname /tmp/gso www.google.com 80 > /dev/null
getsockname(4, {sa_family=AF_INET, sin_port=htons(33134),
sin_addr=inet_addr("195.113.19.62")}, [22560191895568400]) = 0
strace -e getsockname /tmp/gso www.google.com 80 > /dev/null
getsockname(4, {sa_family=AF_INET, sin_port=htons(33134),
sin_addr=inet_addr("195.113.19.62")}, [22560191895568400]) = 0


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[Bug libc/345] getsockname returns a value different of zero when successful

[deathwing00 at forums dot gentoo dot org]

------- Additional Comments From deathwing00 at forums dot gentoo dot org  2004-09-21 12:51 -------
Alright, sorry about that.

I'll give you a more elaborate code soon, but about thre results, what happens 
is that:

www.google.com:80 --> The function returns a value different from zero, errno 
returns successful and the IP addresses returned (both local and remote) are 
correct.

I've tried this also with forums.gentoo.org:80, sf.net:80, 
upload.sf.net:21, ...

As soon as I find the piece of code I used, I'll post it :)

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[Bug libc/345] getsockname returns a value different of zero when successful

[jakub at redhat dot com]

------- Additional Comments From jakub at redhat dot com  2004-09-21 10:42 -------
You haven't bothered to answer the questions in #4.

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           What    |Removed                     |Added
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             Status|REOPENED                    |WAITING


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