tac_plus ipv6 only in single-process mode

[vjai]

Hi All,

I have been trying to make tac_plus work over IPv6.

Couple of things I have noticed.

1) Option -v does not work.
2) tac_plus works only in "-1" mode, i.e. enable single-process
("degraded") mode.

Please let me know if there is some thing I am not doing properly.
Working command for tac_plus when used over IPv6: tac_plus /root/
tac_plus/tac_plus.cfg -1

tac-plus version: Version: 201109122012/PCRE/DES/CURL

Configuration file:
#!/usr/local/sbin/tac_plus
id = spawnd {
listen = {address=2001::b9 port = 49 }
# spawn = {
# instances min = 1
# instances max = 10
# }
# background = yes
}
id = tac_plus {
debug = PACKET AUTHEN AUTHOR

key = abcde123
access log = /root/tac_plus/access.log
accounting log = /root/tac_plus/acct.log
user = admin {
password = permit
pap = clear admins
chap = clear admins
member = admin
service = shell {
default command = permit
default attribute = permit
set priv-lvl = 15
#default authorization = permit

}
}
}
=======================
Please let me know if some one else has faced similar issues and steps
taken to over come it.
Looking forward for expert comments regarding this.

Thanks in advance,
Vijay

[Marc Huber]

Hi Vijai,

On Friday, September 16, 2011 5:35:14 PM UTC+2, vjai wrote:

1) Option -v does not work.
2) tac_plus works only in "-1" mode, i.e.  enable single-process
("degraded") mode.

this indicates non-working file-descriptor passing.

What kind of system is that? Would you mind sharing your "uname -a" output?

Cheers,

Marc

[vijay sharma]

Marc, 

I am using SUSE. 

Linux linux-hwe8 2.6.34.7-0.7-desktop #1 SMP PREEMPT 2010-12-13 11:13:53 +0100 x86_64 x86_64 x86_64 GNU/Linux

linux-hwe8:~ #

Also including log messages. These are generated in non working case:

Sep 16 12:38:43 linux-hwe8 tac_plus[11841]: startup (version 201109122012)

Sep 16 12:38:43 linux-hwe8 tac_plus[11841]: epoll event notification mechanism is being used

Sep 16 12:38:43 linux-hwe8 tac_plus[11841]: bind to [2001::b9]:49 succeeded

Sep 16 12:38:43 linux-hwe8 tac_plus[11842]: execl (/usr/local/sbin/tac_plusΨb@/#177, ...) (/root/tac_plus/PROJECTS/mavis/spawnd_scm_spawn.c:115): No such file or directory

Sep 16 12:38:43 linux-hwe8 tac_plus[11843]: execl (/usr/local/sbin/tac_plusΨb@/#177, ...) (/root/tac_plus/PROJECTS/mavis/spawnd_scm_spawn.c:115): No such file or directory

Sep 16 12:38:50 linux-hwe8 tac_plus[11841]: scm_send_msg (/root/tac_plus/PROJECTS/mavis/spawnd_accepted.c:213): Connection refused

Sep 16 12:38:50 linux-hwe8 tac_plus[11841]: scm_send_msg (/root/tac_plus/PROJECTS/mavis/spawnd_accepted.c:213): Connection refused

Sep 16 12:38:50 linux-hwe8 tac_plus[11845]: execl (/usr/local/sbin/tac_plusΨb@/#177, ...) (/root/tac_plus/PROJECTS/mavis/spawnd_scm_spawn.c:115): No such file or directory

Thanks,

Vijay

[Marc Huber]

Hi Vijay,

thanks ... I should have read the man page for readlink(3) more carefully. Patch below (and in snapshot 201109170904).

Cheers,

Marc


--- mavis/spawnd_main.c    2011/08/21 13:18:16    1.79
+++ mavis/spawnd_main.c    2011/09/17 07:02:26
@@ -98,6 +98,7 @@
 static void get_exec_path(char **path, char *dflt)
 {
     char tmp[PATH_MAX];
+    ssize_t rls;
 
     if (strchr(dflt, '/')) {
     *path = strdup(dflt);
@@ -138,18 +139,14 @@
     }
 #endif
 
-    if (-1 < readlink("/proc/self/exe", tmp, sizeof(tmp))) {
-    *path = strdup(tmp);
-    return;
+    rls = readlink("/proc/self/exe", tmp, sizeof(tmp));
+    if (rls < 0)
+    rls = readlink("/proc/curproc/file", tmp, sizeof(tmp));
+    if (rls < 0) {
+    snprintf(tmp, sizeof(tmp), "/proc/%lu/exe", (u_long) getpid());
+    rls = readlink(tmp, tmp, sizeof(tmp));
     }
-
-    if (-1 < readlink("/proc/curproc/file", tmp, sizeof(tmp))) {
-    *path = strdup(tmp);
-    return;
-    }
-
-    snprintf(tmp, sizeof(tmp), "/proc/%lu/exe", (u_long) getpid());
-    if (-1 < readlink(tmp, tmp, sizeof(tmp))) {
+    if (rls > 0) {
     *path = strdup(tmp);
     return;
     }

[Marc Huber]

Forgot string termination. My bad. Corrected patch below, or snapshot 201109170923.

Cheers,

Marc

--- mavis/spawnd_main.c    2011/08/21 13:18:16    1.79

+++ mavis/spawnd_main.c    2011/09/17 07:22:24

@@ -98,6 +98,7 @@
 static void get_exec_path(char **path, char *dflt)
 {
     char tmp[PATH_MAX];
+    ssize_t rls;
 
     if (strchr(dflt, '/')) {
     *path = strdup(dflt);

@@ -138,18 +139,15 @@

     }
 #endif
 
-    if (-1 < readlink("/proc/self/exe", tmp, sizeof(tmp))) {
-    *path = strdup(tmp);
-    return;
+    rls = readlink("/proc/self/exe", tmp, sizeof(tmp));
+    if (rls < 0)
+    rls = readlink("/proc/curproc/file", tmp, sizeof(tmp));
+    if (rls < 0) {
+    snprintf(tmp, sizeof(tmp), "/proc/%lu/exe", (u_long) getpid());
+    rls = readlink(tmp, tmp, sizeof(tmp));
     }
-
-    if (-1 < readlink("/proc/curproc/file", tmp, sizeof(tmp))) {
-    *path = strdup(tmp);
-    return;
-    }
-
-    snprintf(tmp, sizeof(tmp), "/proc/%lu/exe", (u_long) getpid());
-    if (-1 < readlink(tmp, tmp, sizeof(tmp))) {
+    if (rls > 0) {

+    tmp[rls] = 0;
     *path = strdup(tmp);
     return;
     }

[vijay sharma]

Thanks Marc. 

Took latest changes and its working fine now. :-)

Regards,

Vijay