Date: Mon, 22 Nov 1999 16:57:29 +0100 From: Eric Masson <e-masson@kisoft-services.com> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: ktrace/kdump output interpreting, help needed. Message-ID: <383967E9.E8A2936@kisoft-services.com>
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[-- Attachment #1 --]
Hello,
I'm running, FreeBSD -stable, and trying to make this code work :
#include <stdio.h>
#define BUF_SIZE 512
int rexec(char **, int, char *, char *, char *, int *);
main(int argc, char **argv){
int sock_id;
char *host;
char **ahost;
int port=512;
char user[]="user";
char password[]="pwd";
char cmd[]="dspjob";
int fd2p=0;
void *buffer;
int count,i;
if (argc < 2) {
fprintf(stderr,"usage: %s host\n", argv[0]);
exit(1);
};
host=argv[1];
ahost=&host;
sock_id=rexec(ahost,port,user,password,cmd,&fd2p);
if (sock_id <= 0) {
fprintf(stderr,"Error, can't connect %s\n",argv[1]);
exit(1);
};
buffer = (void *)malloc(BUF_SIZE);
while(count = read(sock_id,buffer,BUF_SIZE)) {
for(i=0;i<count;i++) fprintf(stdout,"%c",*(char*)(buffer + i));
}
exit(0);
}
This code is intented to access a host which understands nothing but
rexec protocol.
It always stop by returning a sock_id value less than 0. The host, user,
password are correct.
So i ran it via ktrace and i don't really understand the following lines
:
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
I don't know whether the socket tries to connect port 512 or not.
Any help would be welcome.
Regards.
Eric Masson
PS: Full kdump is attached.
--
Any opinions expressed above | Murphy's Law Corollary :
are my own, not Kisoft's | Murphy was an optimist.
[-- Attachment #2 --]
403 ktrace RET ktrace 0
403 ktrace CALL execve(0xbfbfdcfb,0xbfbfdc20,0xbfbfdc2c)
403 ktrace NAMI "./rexec"
403 ktrace NAMI "/usr/libexec/ld-elf.so.1"
403 rexec RET execve 0
403 rexec CALL __sysctl(0xbfbfdb40,0x2,0x2805a18c,0xbfbfdb48,0,0)
403 rexec RET __sysctl 0
403 rexec CALL mmap(0,0x8000,0x3,0x1002,0xffffffff,0,0,0)
403 rexec RET mmap 671461376/0x2805b000
403 rexec CALL geteuid
403 rexec RET geteuid 1000/0x3e8
403 rexec CALL getuid
403 rexec RET getuid 1000/0x3e8
403 rexec CALL getegid
403 rexec RET getegid 0
403 rexec CALL getgid
403 rexec RET getgid 0
403 rexec CALL open(0x28056e8a,0,0x28059d4c)
403 rexec NAMI "/var/run/ld-elf.so.hints"
403 rexec RET open 3
403 rexec CALL read(0x3,0xbfbfdaf4,0x80)
403 rexec GIO fd 3 read 128 bytes
"Ehnt\^A\0\0\0\M^@\0\0\0007\0\0\0\0\0\0\0006\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\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\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\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\0\0\0"
403 rexec RET read 128/0x80
403 rexec CALL lseek(0x3,0,0x80,0,0)
403 rexec RET lseek 128/0x80
403 rexec CALL read(0x3,0x2805f000,0x37)
403 rexec GIO fd 3 read 55 bytes
"/usr/lib:/usr/lib/compat:/usr/X11R6/lib:/usr/local/lib\0"
403 rexec RET read 55/0x37
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL access(0x2805c020,0)
403 rexec NAMI "/usr/lib/libc.so.3"
403 rexec RET access 0
403 rexec CALL open(0x2805c020,0,0x28059d4c)
403 rexec NAMI "/usr/lib/libc.so.3"
403 rexec RET open 3
403 rexec CALL read(0x3,0xbfbfcb70,0x1000)
403 rexec GIO fd 3 read 4096 bytes
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\^D\0\0\M-F\^C\0\0\M-U\^B\0\0B\^E\0\0\0\0\0\0\M-s\^D\0\0\M^]\^E\0\0Z\
\^C\0\0K\0\0\0\M-T\^C\0\0\M^_\^B\0\0\M^N\^B\0\0\0\0\0\0\v\^A\0\0\M-S\0\
\0\0\M^C\^C\0\0&\^E\0\0\M-g\0\0\0\M^U\^C\0\0\M-9\^A\0\0\M-w\^A\0\0\M-e\
\0\0\0<\^A\0\0\M-K\0\0\0000\^E\0\0e\^E\0\0D\^E\0\0\M-6\0\0\0\0\0\0\0K\
\^D\0\0\0\0\0\0007\^E\0\0\M-W\^D\0\0\M^K\^C\0\0\^R\^D\0\0e\^A\0\0\0\0\
\0\0\M-*\0\0\0 \^E\0\0\M^]\^B\0\0\^D\^A\0\0\M-i\^B\0\0\M^L\0\0\0o\^B\
\0\0\M-l\^D\0\0V\0\0\0M\^A\0\0\0\0\0\0[\0\0\0\^O\^E\0\0!\^E\0\0O\^C\0\
\0\^R\^C\0\0y\^C\0\0\0\0\0\0\M-.\^C\0\0\0\0\0\0\M^C\0\0\0.\0\0\0e\^C\0\
\0H\^B\0\0\0\0\0\0\M-|\^D\0\0\M-\\^B\0\0\M-X\^D\0\0\0\0\0\0\a\^E\0\0\0\
\0\0\0\M^I\^E\0\0E\^D\0\0\M-I\^D\0\0\0\0\0\0"\0\0\0\M-p\^A\0\0\M-`\^B\
\0\0\0\0\0\0\M-e\^A\0\0\0\0\0\0\^^\^E\0\0\M^U\^E\0\0\M^?\^A\0\0\M-,\^A\
\0\0\0\0\0\0k\^E\0\0\M-&\0\0\0002\^D\0\0\M^\\^B\0\0\0\0\0\0\M-T\^A\0\0\
\^_\^A\0\0\0\0\0\0n\^D\0\0U\^B\0\0\M^@\^C\0\0U\^E\0\0d\^D\0\0\0\0\0\0\
\M-p\^B\0\0005\^D\0\0\0\0\0\0p\^B\0\0\0\0\0\0\^N\^C\0\0C\^B\0\0\M-"\^D\
\0\0\M^Y\0\0\0,\^E\0\0#\^C\0\0\0\0\0\0o\^E\0\0"\^B\0\0\M-i\^D\0\0\0\0\
\0\0\M^F\^C\0\0S\^A\0\0\^Y\^E\0\0\^]\^B\0\0Y\0\0\0\M^N\^A\0\0F\^D\0\0\
\M-V\0\0\0\0\0\0\0a\^B\0\0\M-#\0\0\0\0\0\0\0\M-[\0\0\0;\0\0\0\M-U\^D\0\
\0)\0\0\0\0\0\0\0\M^H\^E\0\0\M-j\0\0\0\M-^\0\0\0\f\^E\0\0
\^B\0\0\M-B\0\0\0|\^C\0\0=\^C\0\0\^Q\^C\0\0006\^E\0\0\M-g\^B\0\0E\^A\0\
\0\0\0\0\0\0\0\0\0\M->\^D\0\0\0\0\0\0\^U\^C\0\0r\^D\0\0\M-J\^D\0\0&\^B\
\0\0\M-(\^B\0\0\^T\0\0\0\0\0\0\0\^T\^C\0\0\0\0\0\0\0\0\0\0\b\^E\0\0j\
\^A\0\0\0\0\0\0\M-A\^D\0\0\a\^A\0\0%\^C\0\0\0\0\0\0\M-+\^D\0\0\^D\0\0\
\0*\^A\0\0r\0\0\0\M-H\^A\0\0n\^C\0\0\M-r\^B\0\0\M-3\0\0\0\M-l\^C\0\0\
\M-E\^D\0\0\M^O\0\0\0n\0\0\0\0\0\0\0z\^C\0\0\M-J\^A\0\0\0\0\0\0\0\0\0\
\0\0\0\0\0\M-!\0\0\0q\^A\0\0\0\0\0\0\M-d\0\0\0\M^Y\^A\0\0\^\\0\0\0\0\0\
\0\0\0\0\0\0\0\0\0\0A\^A\0\0\0\0\0\0i\^B\0\0\^F\^A\0\0\M^B\^B\0\0e\^B\
\0\0%\0\0\0C\^E\0\0\M-J\^C\0\0\^]\^A\0\0\v\^E\0\0\M-q\0\0\0~\^E\0\0u\
\^D\0\0\M^B\^D\0\0L\0\0\0z\0\0\0\0\0\0\0\^U\^B\0\0W\^D\0\0\0\0\0\0\M^\\
\^D\0\0\M-=\^B\0\0W\^B\0\0\M-W\^B\0\0\M-j\^A\0\0%\^D\0\0Y\^B\0\0\M-&\
\^E\0\0004\^C\0\0\^_\^C\0\0\M-X\^C\0\0[\^C\0\0\v\^B\0\0\0\0\0\0\^X\^D\
\0\0\M^A\^A\0\0\M-(\^E\0\0\^Q\^B\0\0\M-h\^D\0\0\0\0\0\0\0\0\0\0\^X\0\0\
\0\0\0\0\0\0\0\0\0?\^B\0\0\0\0\0\0\M-9\^D\0\0\0\0\0\0\^O\^A\0\0\M-7\0\
\0\0G\^C\0\0+\^A\0\0\0\0\0\0$\^D\0\0\0\0\0\0\0\0\0\0\^T\^D\0\0-\^A\0\0\
w\^E\0\0\0\0\0\0\0\0\0\0\0\0\0\0\M^D\^A\0\0\M-y\0\0\0\0\0\0\0\M-B\^D\0\
\0Y\^D\0\0\M-#\^D\0\0#\^D\0\0\^C\0\0\0\0\0\0\0\M-T\^B\0\0\0\0\0\0l\^B\
\0\0\M-i\0\0\0\0\^C\0\0\M-x\^C\0\0\0\0\0\0\^F\^D\0\0\0\0\0\0x\^B\0\0`\
\^E\0\0\0\0\0\0h\^B\0\0\0\0\0\0\0\0\0\0\M-R\^A\0\0\M-Q\^B\0\0\0\0\0\0\
\M-&\^A\0\0c\^E\0\0\M->\^B\0\0\0\0\0\0]\^C\0\0\M-|\^B\0\0\M-0\^A\0\0\
\M-P\^C\0\0\M-@\^A\0\0\0\0\0\0<\^E\0\0C\^C\0\0\0\0\0\0"
403 rexec RET read 4096/0x1000
403 rexec CALL mmap(0,0x81000,0x5,0x2,0x3,0,0,0)
403 rexec RET mmap 671494144/0x28063000
403 rexec CALL mmap(0x280d0000,0x5000,0x3,0x12,0x3,0,0x6c000,0)
403 rexec RET mmap 671940608/0x280d0000
403 rexec CALL mmap(0x280d5000,0xf000,0x3,0x1012,0xffffffff,0,0,0)
403 rexec RET mmap 671961088/0x280d5000
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL open(0x280ce369,0,0x1b6)
403 rexec NAMI "/etc/host.conf"
403 rexec RET open 3
403 rexec CALL fstat(0x3,0xbfbfd620)
403 rexec RET fstat 0
403 rexec CALL readlink(0x280cfbc0,0xbfbfd61c,0x3f)
403 rexec NAMI "/etc/malloc.conf"
403 rexec RET readlink -1 errno 2 No such file or directory
403 rexec CALL mmap(0,0x1000,0x3,0x1002,0xffffffff,0,0,0)
403 rexec RET mmap 672022528/0x280e4000
403 rexec CALL break(0x804d000)
403 rexec RET break 0
403 rexec CALL break(0x804f000)
403 rexec RET break 0
403 rexec CALL read(0x3,0x804d000,0x2000)
403 rexec GIO fd 3 read 209 bytes
"# $FreeBSD: src/etc/host.conf,v 1.5.2.1 1999/08/29 14:18:44 peter Exp \
$
# First try the /etc/hosts file
hosts
# Now try the nameserver next.
bind
# If you have YP/NIS configured, uncomment the next line
# nis
"
403 rexec RET read 209/0xd1
403 rexec CALL read(0x3,0x804d000,0x2000)
403 rexec GIO fd 3 read 0 bytes
""
403 rexec RET read 0
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL open(0x280ce39e,0,0x1b6)
403 rexec NAMI "/etc/hosts"
403 rexec RET open 3
403 rexec CALL gettimeofday(0xbfbfd67c,0)
403 rexec RET gettimeofday 0
403 rexec CALL getpid
403 rexec RET getpid 403/0x193
403 rexec CALL issetugid
403 rexec RET issetugid 0
403 rexec CALL open(0x280cf0ea,0,0x1b6)
403 rexec NAMI "/etc/resolv.conf"
403 rexec RET open 4
403 rexec CALL fstat(0x4,0xbfbfd5c0)
403 rexec RET fstat 0
403 rexec CALL read(0x4,0x804d000,0x2000)
403 rexec GIO fd 4 read 57 bytes
"search nantes.kisoft-services.com
nameserver 192.168.1.1
"
403 rexec RET read 57/0x39
403 rexec CALL read(0x4,0x804d000,0x2000)
403 rexec GIO fd 4 read 0 bytes
""
403 rexec RET read 0
403 rexec CALL close(0x4)
403 rexec RET close 0
403 rexec CALL issetugid
403 rexec RET issetugid 0
403 rexec CALL fstat(0x3,0xbfbfda10)
403 rexec RET fstat 0
403 rexec CALL read(0x3,0x804d000,0x2000)
403 rexec GIO fd 3 read 1021 bytes
"# $FreeBSD: src/etc/hosts,v 1.9.2.1 1999/08/29 14:18:44 peter Exp $
#
# Host Database
# This file should contain the addresses and aliases
# for local hosts that share this file.
# In the presence of the domain name service or NIS, this file may
# not be consulted at all; see /etc/host.conf for the resolution order\
.
#
#
127.0.0.1 localhost localhost.my.domain myname.my.domain
#
# Imaginary network.
#10.0.0.2 myname.my.domain myname
#10.0.0.3 myfriend.my.domain myfriend
#
# According to RFC 1918, you can use the following IP networks for
# private nets which will never be connected to the Internet:
#
# 10.0.0.0 - 10.255.255.255
# 172.16.0.0 - 172.31.255.255
# 192.168.0.0 - 192.168.255.255
#
# In case you want to be able to connect to the Internet, you need
# real official assigned numbers. PLEASE PLEASE PLEASE do not try
# to invent your own network numbers but instead get one from your
# network provider (if any) or from the Internet Registry (ftp to
# rs.internic.net, directory `/templates').
#
"
403 rexec RET read 1021/0x3fd
403 rexec CALL read(0x3,0x804d000,0x2000)
403 rexec GIO fd 3 read 0 bytes
""
403 rexec RET read 0
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL issetugid
403 rexec RET issetugid 0
403 rexec CALL issetugid
403 rexec RET issetugid 0
403 rexec CALL socket(0x2,0x2,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0x280e3500,0x10)
403 rexec RET connect 0
403 rexec CALL sendto(0x3,0xbfbfce54,0x35,0,0,0)
403 rexec GIO fd 3 wrote 53 bytes
"\f\M-T\^A\0\0\^A\0\0\0\0\0\0\bsrvasnan\^Fnantes\^Okisoft-services\^Cco\
m\0\0\^A\0\^A"
403 rexec RET sendto 53/0x35
403 rexec CALL sigaction(0xc,0xbfbfcca4,0xbfbfccb0)
403 rexec RET sigaction 0
403 rexec CALL poll(0xbfbfcc0c,0x1,0x1388)
403 rexec RET poll 1
403 rexec CALL sigaction(0xc,0xbfbfccb0,0)
403 rexec RET sigaction 0
403 rexec CALL recvfrom(0x3,0xbfbfd700,0x400,0,0xbfbfcc94,0xbfbfcc00)
403 rexec GIO fd 3 read 165 bytes
"\f\M-T\M^E\M^@\0\^A\0\^B\0\^A\0\^A\bsrvasnan\^Fnantes\^Okisoft-service\
s\^Ccom\0\0\^A\0\^A\M-@\f\0\^E\0\^A\0\0\^N\^P\0)\fsrvas4nanssv\^Fnante\
s\^Okisoft-services\^Ccom\0\M-@A\0\^A\0\^A\0\0\^N\^P\0\^D\M-@\M-(\^A
\M-@N\0\^B\0\^A\0\0\^N\^P\0\^O\fsrvbsdnanssv\M-@N\M-@\M^F\0\^A\0\^A\0\
\0\^N\^P\0\^D\M-@\M-(\^A\^A"
403 rexec RET recvfrom 165/0xa5
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL open(0xbfbfd72c,0,0x1b6)
403 rexec NAMI "/home/emss/.netrc"
403 rexec RET open -1 errno 2 No such file or directory
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL close(0x3)
403 rexec RET close 0
403 rexec CALL nanosleep(0xbfbfdb28,0xbfbfdb20)
403 rexec RET nanosleep 0
403 rexec CALL socket(0x2,0x1,0)
403 rexec RET socket 3
403 rexec CALL connect(0x3,0xbfbfdb94,0x10)
403 rexec RET connect -1 errno 61 Connection refused
403 rexec CALL writev(0x2,0xbfbfdb14,0x4)
403 rexec GIO fd 2 wrote 60 bytes
"srvas4nanssv.nantes.kisoft-services.com: Connection refused
"
403 rexec RET writev 60/0x3c
403 rexec CALL write(0x2,0xbfbfd480,0x1e)
403 rexec GIO fd 2 wrote 30 bytes
"Error, can't connect srvasnan
"
403 rexec RET write 30/0x1e
403 rexec CALL exit(0x1)
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