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From: Saravanan Chanemouganandam <schane@osmozis.com>
To: netfilter@vger.kernel.org
Cc: busybox@busybox.net, linux@arm.linux.org.uk
Subject: iptables library loading problem
Date: Tue, 18 Dec 2007 16:05:27 +0100	[thread overview]
Message-ID: <200712181605.28712.schane@osmozis.com> (raw)


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Hi all,

I have an issue in using netfilter iptables and xtables support built into the 
linux 2.6.16 kernel image on the arm target platform. The problem is that 
when a iptables command is executed with xtables supports, it doesn't find 
the required libraries installed in /lib/iptables and instead it looks 
into /lib [ open("/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such 
file or directory) ] and throws 
sara# iptables -t nat -A POSTROUTING -o br_wan -j MASQUERADE
iptables v1.3.8: Couldn't load target `MASQUERADE':File not found

Try `iptables -h' or 'iptables --help' for more information.

Where as it works fine, if I move all /lib/iptables/*.so to /lib. Is there 
anything Iam missing like symbolic links or PATH, while installing iptables 
using  make BINDIR=../root/sbin LIBDIR=../root/lib install

Here is the strace message of 
sara#strace iptables -t nat -A POSTROUTING -o br_wan -j MASQUERADE
execve("/sbin/iptables", ["iptables", "-t", "nat", "-A", "POSTROUTING", "-o", 
"br_wan", "-j", "MASQUERADE"],0
mmap2(NULL, 20, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x40005000
stat("/etc/ld.so.cache", {st_mode=S_IFREG|0644, st_size=698, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY)      = 3
mmap2(NULL, 698, PROT_READ, MAP_SHARED, 3, 0) = 0x40006000
close(3)                                = 0
open("/lib/libdl.so.0", O_RDONLY)       = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=8900, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x40007000
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0(\10\0\000"..., 4096) = 
4096
mmap2(NULL, 40960, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4000e000
mmap2(0x4000e000, 5824, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 
0x4000e000
mmap2(0x40017000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x1) = 
0x40017000
close(3)                                = 0
munmap(0x40007000, 4096)                = 0
open("/lib/libgcc_s.so.1", O_RDONLY)    = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=60315, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x40007000
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\320\31\0"..., 4096) = 
4096
mmap2(NULL, 69632, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40018000
mmap2(0x40018000, 34728, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 
0x40018000
mmap2(0x40028000, 2380, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x8) = 
0x40028000
close(3)                                = 0
munmap(0x40007000, 4096)                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=227484, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 
0x40007000
read(3, "\177ELF\1\1\1a\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0\0\201\0\000"..., 4096) 
= 4096
mmap2(NULL, 278528, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40029000
mmap2(0x40029000, 222048, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 
0x40029000
mmap2(0x40067000, 4960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x36) 
= 0x40067000
mmap2(0x40069000, 13592, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
MAP_ANONYMOUS, -1, 0) = 0x40069000
close(3)                                = 0
munmap(0x40007000, 4096)                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=227484, ...}) = 0
close(3)                                = 0
open("/lib/libc.so.0", O_RDONLY)        = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=227484, ...}) = 0
close(3)                                = 0
munmap(0x40006000, 698)                 = 0
stat("/lib/ld-uClibc.so.0", {st_mode=S_IFREG|0755, st_size=21096, ...}) = 0
mprotect(0x40017000, 4096, PROT_READ)   = 0
mprotect(0x40067000, 4096, PROT_READ)   = 0
mprotect(0x4000c000, 4096, PROT_READ)   = 0
ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 
0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 
0
stat("/etc/ld.so.cache", {st_mode=S_IFREG|0644, st_size=698, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY)      = 3
mmap2(NULL, 698, PROT_READ, MAP_SHARED, 3, 0) = 0x40006000
close(3)                                = 0
open("/home/sara/BuildRoot/buildroot/project_build_arm/uclibc/root/lib/iptables/libipt_MASQUERADE.so", 
O_RDO)
open("/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("/usr/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
munmap(0x40006000, 698)                 = 0
brk(0)                                  = 0x1c000
brk(0x1d000)                            = 0x1d000
socket(PF_INET, SOCK_RAW, IPPROTO_RAW)  = 3
getsockopt(3, SOL_IP, 0x40 /* IP_??? */, 
"nat\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., [84])0
getsockopt(3, SOL_IP, 0x41 /* IP_??? */, 
"nat\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., [656]0
stat("/etc/ld.so.cache", {st_mode=S_IFREG|0644, st_size=698, ...}) = 0
open("/etc/ld.so.cache", O_RDONLY)      = 4
mmap2(NULL, 698, PROT_READ, MAP_SHARED, 4, 0) = 0x40006000
close(4)                                = 0
open("/home/sara/BuildRoot/buildroot/project_build_arm/uclibc/root/lib/iptables/libipt_MASQUERADE.so", 
O_RDO)
open("/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("/usr/lib/libipt_MASQUERADE.so", O_RDONLY) = -1 ENOENT (No such file or 
directory)
munmap(0x40006000, 698)                 = 0
write(2, "iptables", 8iptables)                 = 8
write(2, " v", 2 v)                       = 2
write(2, "1.3.8", 51.3.8)                    = 5
write(2, ": ", 2: )                       = 2
write(2, "Couldn\'t load target `", 22Couldn't load target `) = 22
write(2, "MASQUERADE", 10MASQUERADE)              = 10
write(2, "\':", 2':)                      = 2
write(2, "File not found", 14File not found)          = 14
write(2, "\n", 1
)                       = 1

Can anybody tell me why it doesnt find the needed libraries in 
the /lib/iptables ? 

Thanks
Sara

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