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telnetd
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Use realhostname(). 

git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@45395 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
This commit is contained in:
brian 1999-04-06 23:35:21 +00:00
parent a483d5b52d
commit 8229e94407
1 changed files with 9 additions and 39 deletions
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48
telnetd/telnetd.c
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@ -60,6 +60,9 @@ static const char rcsid[] =
#include <err.h>
#include <arpa/inet.h>
#include <libutil.h>
#include <utmp.h>
#if defined(_SC_CRAY_SECURE_SYS)
#include <sys/sysv.h>
#include <sys/secdev.h>
@ -803,7 +806,7 @@ terminaltypeok(s)
char *hostname;
char host_name[MAXHOSTNAMELEN];
char remote_host_name[MAXHOSTNAMELEN];
char remote_hostname[UT_HOSTSIZE + 1];
extern void telnet P((int, int, char *));
@ -816,8 +819,6 @@ char user_name[256];
doit(who)
struct sockaddr_in *who;
{
char *host = NULL;
struct hostent *hp;
int ptynum;
/*
@ -859,49 +860,18 @@ doit(who)
}
#endif /* _SC_CRAY_SECURE_SYS */
/* get name of connected client */
hp = gethostbyaddr((char *)&who->sin_addr, sizeof (struct in_addr),
who->sin_family);
if (hp == NULL && registerd_host_only) {
/* get name of connected client */
if (realhostname(remote_hostname, sizeof remote_hostname - 1,
&who->sin_addr) == HOSTNAME_INVALIDADDR && registerd_host_only)
fatal(net, "Couldn't resolve your address into a host name.\r\n\
Please contact your net administrator");
} else if (hp &&
(strlen(hp->h_name) <= (unsigned int)((utmp_len < 0) ? -utmp_len
: utmp_len))) {
strncpy(remote_host_name, hp->h_name,
sizeof(remote_host_name)-1);
hp = gethostbyname(remote_host_name);
if (hp == NULL)
host = inet_ntoa(who->sin_addr);
else for (; ; hp->h_addr_list++) {
if (hp->h_addr_list[0] == NULL) {
/* End of list - ditch it */
host = inet_ntoa(who->sin_addr);
break;
}
if (!bcmp(hp->h_addr_list[0], (caddr_t)&who->sin_addr,
sizeof(who->sin_addr))) {
host = hp->h_name;
break; /* OK! */
}
}
} else {
host = inet_ntoa(who->sin_addr);
}
/*
* We must make a copy because Kerberos is probably going
* to also do a gethost* and overwrite the static data...
*/
strncpy(remote_host_name, host, sizeof(remote_host_name)-1);
remote_host_name[sizeof(remote_host_name)-1] = 0;
host = remote_host_name;
(void) gethostname(host_name, sizeof (host_name));
hostname = host_name;
#if defined(AUTHENTICATION) || defined(ENCRYPTION)
auth_encrypt_init(hostname, host, "TELNETD", 1);
auth_encrypt_init(hostname, remote_hostname, "TELNETD", 1);
#endif
init_env();
@ -921,7 +891,7 @@ doit(who)
}
#endif /* _SC_CRAY_SECURE_SYS */
telnet(net, pty, host); /* begin server process */
telnet(net, pty, remote_hostname); /* begin server process */
/*NOTREACHED*/
} /* end of doit */