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and subject line Bug#237765: libc6: getaddrinfo() fails to get right port number for
all service
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From: Dmitry Baryshkov <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: libc6: getaddrinfo() fails to get right port number for all service
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Date: Sat, 13 Mar 2004 15:12:39 +0300
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Package: libc6
Version: 2.3.2.ds1-11
Severity: normal
getaddrinfo() fails to get service port.
Here is nsswitch.conf:
===
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat
group: compat
shadow: compat
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
===
And test program, that can demonstrate this effect:
===
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
int main(int argc, char **argv)
{
struct addrinfo *addr_list;
int ret;
if (argc != 2)
{
fprintf(stderr, "Usage: %s <service>\n", argv[0]);
return 1;
}
ret = getaddrinfo("127.0.0.1", argv[1], NULL, &addr_list);
if (ret != 0)
{
fprintf(stderr, "Error at getaddrinfo: %s\n", gai_strerror(ret));
return 2;
}
if (addr_list->ai_family == PF_INET)
fprintf(stdout, "For IPv4 service '%s' port is %u\n", argv[1],
((struct sockaddr_in*)(addr_list->ai_addr))->sin_port);
else
fprintf(stdout, "For IPv6 service '%s' port is %u\n", argv[1],
((struct sockaddr_in*)(addr_list->ai_addr))->sin_port);
return 0;
}
===
Example:
$./getaddrinfo echo
For IPv4 service 'echo' port is 1792
$
Tell me if I have to provide more info.
--
With best wishes
Dmitry Baryshkov
-- System Information:
Found unknown policy: ('500', 'testing-proposed-updates')Found unknown policy: ('500',
'testing-proposed-updates')Found unknown policy: ('500',
'testing-proposed-updates')Debian Release: testing/unstable
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i586)
Kernel: Linux 2.6.3
Locale: LANG=ru_RU.KOI8-R, LC_CTYPE=ru_RU.KOI8-R
Versions of packages libc6 depends on:
ii libdb1-compat 2.1.3-7 The Berkeley database routines [gl
-- no debconf information
---------------------------------------
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Date: Sat, 13 Mar 2004 20:33:22 -0500
From: Daniel Jacobowitz <[EMAIL PROTECTED]>
To: Dmitry Baryshkov <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#237765: libc6: getaddrinfo() fails to get right port number for all
service
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On Sat, Mar 13, 2004 at 03:12:39PM +0300, Dmitry Baryshkov wrote:
> if (addr_list->ai_family == PF_INET)
> fprintf(stdout, "For IPv4 service '%s' port is %u\n", argv[1],
> ((struct sockaddr_in*)(addr_list->ai_addr))->sin_port);
> else
> fprintf(stdout, "For IPv6 service '%s' port is %u\n", argv[1],
> ((struct sockaddr_in*)(addr_list->ai_addr))->sin_port);
Try using ntohs if you want to look at the value of sin_port. The port
is in network byte order.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
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