1st sorry for the delay, was on businesstrip!
Marius Tomaschewski wrote:
>On Thu, Nov 21, 2002 at 10:28:00AM +0100, Frank Sackewitz wrote:
>> Hi,
>
>Hi!
>
Shark! (german joke!)
>> I´ve to apologize to the proxy-suite-team. The mistake was sitting in
>> front of the screen.
>>
>> ftp-proxy works fine if I start it out of my chroot. Running in my
>> chroot-envir ftp-proxy is
>> unable to resolve IP-Addresses via bind. Via host it works.
>>
>> What functions uses ftp-proxy to resolve addresses via bind?
>> Does it call any binary?
>
<No, it uses normal glibc functions gethostname, gethostbyname
>and inet_aton, inet_ntoa. No direct resolver calls are used.
>
>The glibc is using the NSS stuff (name service switch), i.e.
>/etc/nsswitch.conf, /etc/resolv.conf, libnss_dns, libnsl,
>libresolv. You need them all - config+libs - in your chroot.
>
As I said - all files where there.
>Note also: if you do any changes to these files, you have to
>restart/reload the nscd (name service caching daemon).
>
I´m not sure, but I think I hav´nt change anything.
>Try to strace it. Start the proxy, connect using the clinent,
>find out the pid of the child process and attach strace to it:
>
> strace -f -o filename -p PID
>
>After strace is running, login using MagicChar with hostname.
>You should be able to see, what happens / fails.
>
Part of the output:
29650 recv(0, "USER anonymous(a)ftp.de.openbsd.or"..., 35, 0) = 35
=> I have typed in: .org
30226 recv(0, "USER anonymous(a)ftp.de.openbsd.or"..., 36, 0) = 36
30226 gettimeofday({1038481617, 376494}, NULL) = 0
30226 getpid() = 30226
30226 open("/etc/resolv.conf", O_RDONLY) = 3
30226 fstat64(3, {st_mode=S_IFREG|0644, st_size=90, ...}) = 0
30226 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40018000
30226 read(3, "nameserver 193.101.111.10\nnamese"..., 4096) = 90
30226 read(3, "", 4096) = 0
30226 close(3) = 0
30226 munmap(0x40018000, 4096) = 0
30226 getpid() = 30226
30226 open("/etc/resolv.conf", O_RDONLY) = 3
30226 fstat64(3, {st_mode=S_IFREG|0644, st_size=90, ...}) = 0
30226 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40018000
30226 read(3, "nameserver 193.101.111.10\nnamese"..., 4096) = 90
30226 read(3, "", 4096) = 0
30226 close(3) = 0
30226 munmap(0x40018000, 4096) = 0
30226 socket(PF_UNIX, SOCK_STREAM, 0) = 3
30226 connect(3, {sin_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110)
= -1 ENOENT (No such file or directory)
30226 close(3) = 0
30226 open("/etc/host.conf", O_RDONLY) = 3
30226 fstat64(3, {st_mode=S_IFREG|0644, st_size=370, ...}) = 0
30226 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40018000
30226 read(3, "#\n# /etc/host.conf - resolver co"..., 4096) = 370
30226 read(3, "", 4096) = 0
30226 close(3) = 0
30226 munmap(0x40018000, 4096) = 0
30226 open("/etc/hosts", O_RDONLY) = 3
30226 fcntl64(3, F_GETFD) = 0
30226 fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
30226 fstat64(3, {st_mode=S_IFREG|0644, st_size=917, ...}) = 0
30226 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40018000
30226 read(3, "#\n# hosts This file desc"..., 4096) = 917
30226 read(3, "", 4096) = 0
30226 close(3) = 0
30226 munmap(0x40018000, 4096) = 0
30226 open("/etc/ld.so.cache", O_RDONLY) = 3
30226 fstat64(3, {st_mode=S_IFREG|0644, st_size=64, ...}) = 0
30226 old_mmap(NULL, 64, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40018000
30226 close(3) = 0
30226 open("/lib/i586/mmx/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such
file or directory)
30226 stat64("/lib/i586/mmx", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/lib/i586/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such
file or directory)
30226 stat64("/lib/i586", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/lib/mmx/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such file
or directory)
30226 stat64("/lib/mmx", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/lib/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such file or
directory)
30226 stat64("/lib", {st_mode=S_IFDIR|0755, st_size=272, ...}) = 0
30226 open("/usr/lib/i586/mmx/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No
such file or directory)
30226 stat64("/usr/lib/i586/mmx", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/usr/lib/i586/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such
file or directory)
30226 stat64("/usr/lib/i586", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/usr/lib/mmx/libnss_dns.so.2", O_RDONLY) = -1 ENOENT (No such
file or directory)
30226 stat64("/usr/lib/mmx", 0xbfffc3dc) = -1 ENOENT (No such file or
directory)
30226 open("/usr/lib/libnss_dns.so.2", O_RDONLY) = 3
30226 read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0`\16\0\000"..., 1024) =
1024
30226 fstat64(3, {st_mode=S_IFREG|0755, st_size=16184, ...}) = 0
30226 old_mmap(NULL, 15560, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) =
0x40415000
30226 mprotect(0x40418000, 3272, PROT_NONE) = 0
30226 old_mmap(0x40418000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED, 3, 0x2000) = 0x40418000
30226 close(3) = 0
30226 munmap(0x40018000, 64) = 0
30226 socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
30226 connect(3, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.101.111.10")}}, 28) = 0
30226 send(3, "0n\1\0\0\1\0\0\0\0\0\0\3ftp\2de\7openbsd\4org "..., 37, 0)
= 37
30226 gettimeofday({1038481617, 444069}, NULL) = 0
30226 poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
30226 recvfrom(3, "0n\205\203\0\1\0\0\0\1\0\0\3ftp\2de\7openbsd\4org "...,
1024, 0, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.101.111.10")}}, [16]) = 112
30226 close(3) = 0
30226 socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
30226 connect(3, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.101.111.10")}}, 28) = 0
30226 send(3, "0o\1\0\0\1\0\0\0\0\0\0\3ftp\2de\7openbsd\4org "..., 46, 0)
= 46
30226 gettimeofday({1038481617, 716641}, NULL) = 0
30226 poll([{fd=3, events=POLLIN, revents=POLLIN}], 1, 5000) = 1
30226 recvfrom(3, "0o\205\203\0\1\0\0\0\1\0\0\3ftp\2de\7openbsd\4org "...,
1024, 0, {sin_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("193.101.111.10")}}, [16]) = 121
30226 close(3) = 0
30226 time([1038481617]) = 1038481617
30226 getpid() = 30226
30226 write(4, "ftp-child [30226] <11/28-11:06:5"..., 105) = 105
30226 select(1, [0], [0], NULL, {900, 0}) = 1 (out [0], left {900, 0})
30226 send(0, "501 Invalid destination in user "..., 39, 0) = 39
30226 select(1, [0], [], NULL, {900, 0} <unfinished ...>
--
Bye
Frank Sackewitz
EDM
HASCO-GERMANY
