[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Strange getservbyname behaviour
From: |
Tuninetto, Paolo |
Subject: |
Strange getservbyname behaviour |
Date: |
Thu, 28 Nov 2002 16:37:05 +0100 |
Hi, I was trying to compile the ftpd from GNU inteutils and I found that when I
try to run ftpd -D (daemon mode) it opens a connection on the 5376 port instead
of the default 21.
Looking at the rource and it seems that there is a problem with the
getservbyname function call that ftpd is using.
This is a simple test program. Afaik it should reply with PORT: 21 but the
reply I get is PORT: 5376 (5376 = 21*256)
I get the same strange behaviour using any other servise/protocol (defined in
my /etc/services) and also using the getservbyport function...
#include <stdio.h>
#include <netdb.h>
int main() {
struct servent *s;
s = getservbyname("ftp","tcp");
if (s == NULL)
printf("NULL!\n");
else
printf("PORT: %d\n", s->s_port);
}
Thanks in advance,
Paolo
- Strange getservbyname behaviour,
Tuninetto, Paolo <=