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Added a -D option to set the TCP_NODELAY socket option. This improves

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responsiveness at the expense of some additional network traffic.
This commit is contained in:
David Greenman 1995-10-15 03:40:57 +00:00
parent e898e17646
commit dfd651579c
2 changed files with 17 additions and 5 deletions
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5
libexec/rlogind/rlogind.8
View File

@ -39,7 +39,7 @@
.Nd remote login server
.Sh SYNOPSIS
.Nm rlogind
.Op Fl aln
.Op Fl Daln
.Sh DESCRIPTION
.Nm Rlogind
is the server for the
@ -50,6 +50,9 @@ with authentication based on privileged port numbers from trusted hosts.
Options supported by
.Nm rlogind :
.Bl -tag -width Ds
.It Fl D
Set TCP_NODELAY socket option. This improves responsiveness at the expense of
some additional network traffic.
.It Fl a
Ask hostname for verification.
.It Fl l

17
libexec/rlogind/rlogind.c
View File

@ -61,6 +61,7 @@ static char sccsid[] = "@(#)rlogind.c 8.1 (Berkeley) 6/4/93";
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
@ -89,9 +90,9 @@ u_char tick_buf[sizeof(KTEXT_ST)];
Key_schedule schedule;
int doencrypt, retval, use_kerberos, vacuous;
#define ARGSTR "alnkvx"
#define ARGSTR "Dalnkvx"
#else
#define ARGSTR "aln"
#define ARGSTR "Daln"
#endif /* KERBEROS */
char *env[2];
@ -101,6 +102,7 @@ static char term[64] = "TERM=";
#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
int keepalive = 1;
int check_all = 0;
int no_delay;
struct passwd *pwd;
@ -131,6 +133,9 @@ main(argc, argv)
opterr = 0;
while ((ch = getopt(argc, argv, ARGSTR)) != EOF)
switch (ch) {
case 'D':
no_delay = 1;
break;
case 'a':
check_all = 1;
break;
@ -176,9 +181,13 @@ main(argc, argv)
if (keepalive &&
setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0)
syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
if (no_delay &&
setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
syslog(LOG_WARNING, "setsockopt (TCP_NODELAY): %m");
on = IPTOS_LOWDELAY;
if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
doit(0, &from);
}
@ -715,9 +724,9 @@ void
usage()
{
#ifdef KERBEROS
syslog(LOG_ERR, "usage: rlogind [-aln] [-k | -v]");
syslog(LOG_ERR, "usage: rlogind [-Daln] [-k | -v]");
#else
syslog(LOG_ERR, "usage: rlogind [-aln]");
syslog(LOG_ERR, "usage: rlogind [-Daln]");
#endif
}