[9fans] Failed 'reject' function?
Hi all,
I tried very simple program on native Plan9:
#include u.h
#include libc.h
void
main(int, char**)
{
int afd, lfd;
char adir[NETPATHLEN], ldir[NETPATHLEN];
afd = announce(tcp!*!20540, adir);
if (afd 0)
sysfatal(listen: %r);
lfd = listen(adir, ldir);
if (lfd 0)
sysfatal(listen: %r);
if (reject(lfd, ldir, unauthorized) 0)
sysfatal(reject: %r);
close(lfd);
close(afd);
exits(nil);
}
I dicovered that the funtion 'reject' fails:
term% 8.out
reject: unknown control request
In 'ratrace' listing I can really see the 'reject' function failure:
348 8.out Open 33a7 0xdfffe9bc//net/cs 0x2 = 3 1412926762174586973
1412926762174841785
348 8.out Pwrite 5577 3 0x7880/tcp!*!20540 11 -1 = 11
1412926762186976342 1412926762187086984
348 8.out Seek 3391 0x7ab8 3 0x0 0 = 0 1412926762198637769
1412926762198646989
348 8.out Pread 557f 3 0xdfffe9bc 255 -1 0xdfffe9bc//net/tcp/clone.20540
255 -1 = 20 1412926762200546351 1412926762200619275
348 8.out Close 1225 3 = 0 1412926762221784602 1412926762221865069
348 8.out Open 33a7 0xdfffebe0//net/tcp/clone 0x2 = 3
1412926762223717492 1412926762223849089
348 8.out Pread 557f 3 0xdfffede9 246 -1 0xdfffede9/4 246 -1 = 1
1412926762235853725 1412926762235866298
348 8.out Pwrite 5577 3 0xdfffece0/announce.20540 14 -1 = 14
1412926762247454802 1412926762247479948
348 8.out Open 33a7 0xdfffede0//net/tcp/4/listen 0x2 = 4
1412926762259028218 1412926771821372908
348 8.out Pread 557f 4 0xdfffede9 246 -1 0xdfffede9/6 246 -1 = 1
1412926771844967723 1412926771844984487
348 8.out Pwrite 5577 4 0xdfffedec/reject.6.unauthorized 21 -1 = -1
unknown control request 1412926771854330421 1412926771854347185
348 8.out Errstr 5587 0xdfffe914 128 128 = 0 1412926771871626615
1412926771871632483
348 8.out Errstr 5587 0xdfffe914 128 128 = 0 unknown control request
1412926771887234674 1412926771887239703
348 8.out Pwrite 5577 2 0xdfffe980/reject:.unknown.control.request. 32
-1reject: unknown control request
= 32 1412926771918100040 1412926771932457957
348 8.out Open 33a7 0x7538/#c/pid 0x0 = 5 1412926771947976329
1412926771948085295
348 8.out Pread 557f 5 0xdfffeaa0 20 -1 0xdfffeaa0/348. 20 -1 =
12 1412926771963591547 1412926771963607473
348 8.out Close 1225 5 = 0 1412926771979115786 1412926771979128359
348 8.out Exits 122d 0xdfffeadc/reject: unknown control request
Do you have any explanation?
Did I make some bug in the program?
Thanks in advance.
Pavel
Re: [9fans] Failed 'reject' function?
On 10 October 2014 08:48, Pavel Klinkovský pavel.klinkov...@gmail.com wrote: Do you have any explanation? Did I make some bug in the program? Not all network types implement reject, and the result of reject is therefore usually ignored (since in any case the connection is going to be closed).
Re: [9fans] Failed 'reject' function?
On 10 October 2014 10:22, Charles Forsyth charles.fors...@gmail.com wrote: Not all network types implement reject, To be more precise: not all network types allow a diagnostic to be sent with the reset or close and sadly TCP/IP is one of them.
Re: [9fans] Failed 'reject' function?
Hi Pavel !
It seems, you do it incorrectly :) dial(2) has an exact example if using
announce/listen/accept functions.
2014-10-10 11:48 GMT+04:00 Pavel Klinkovský pavel.klinkov...@gmail.com:
Hi all,
I tried very simple program on native Plan9:
#include u.h
#include libc.h
void
main(int, char**)
{
int afd, lfd;
char adir[NETPATHLEN], ldir[NETPATHLEN];
afd = announce(tcp!*!20540, adir);
if (afd 0)
sysfatal(listen: %r);
lfd = listen(adir, ldir);
if (lfd 0)
sysfatal(listen: %r);
if (reject(lfd, ldir, unauthorized) 0)
sysfatal(reject: %r);
close(lfd);
close(afd);
exits(nil);
}
I dicovered that the funtion 'reject' fails:
term% 8.out
reject: unknown control request
In 'ratrace' listing I can really see the 'reject' function failure:
348 8.out Open 33a7 0xdfffe9bc//net/cs 0x2 = 3 1412926762174586973
1412926762174841785
348 8.out Pwrite 5577 3 0x7880/tcp!*!20540 11 -1 = 11
1412926762186976342 1412926762187086984
348 8.out Seek 3391 0x7ab8 3 0x0 0 = 0 1412926762198637769
1412926762198646989
348 8.out Pread 557f 3 0xdfffe9bc 255 -1 0xdfffe9bc//net/tcp/clone.20540
255 -1 = 20 1412926762200546351 1412926762200619275
348 8.out Close 1225 3 = 0 1412926762221784602 1412926762221865069
348 8.out Open 33a7 0xdfffebe0//net/tcp/clone 0x2 = 3
1412926762223717492 1412926762223849089
348 8.out Pread 557f 3 0xdfffede9 246 -1 0xdfffede9/4 246 -1 = 1
1412926762235853725 1412926762235866298
348 8.out Pwrite 5577 3 0xdfffece0/announce.20540 14 -1 = 14
1412926762247454802 1412926762247479948
348 8.out Open 33a7 0xdfffede0//net/tcp/4/listen 0x2 = 4
1412926762259028218 1412926771821372908
348 8.out Pread 557f 4 0xdfffede9 246 -1 0xdfffede9/6 246 -1 = 1
1412926771844967723 1412926771844984487
348 8.out Pwrite 5577 4 0xdfffedec/reject.6.unauthorized 21 -1 = -1
unknown control request 1412926771854330421 1412926771854347185
348 8.out Errstr 5587 0xdfffe914 128 128 = 0 1412926771871626615
1412926771871632483
348 8.out Errstr 5587 0xdfffe914 128 128 = 0 unknown control request
1412926771887234674 1412926771887239703
348 8.out Pwrite 5577 2 0xdfffe980/reject:.unknown.control.request. 32
-1reject: unknown control request
= 32 1412926771918100040 1412926771932457957
348 8.out Open 33a7 0x7538/#c/pid 0x0 = 5 1412926771947976329
1412926771948085295
348 8.out Pread 557f 5 0xdfffeaa0 20 -1 0xdfffeaa0/348. 20 -1 =
12 1412926771963591547 1412926771963607473
348 8.out Close 1225 5 = 0 1412926771979115786 1412926771979128359
348 8.out Exits 122d 0xdfffeadc/reject: unknown control request
Do you have any explanation?
Did I make some bug in the program?
Thanks in advance.
Pavel
--
С наилучшими пожеланиями
Жилкин Сергей
With best regards
Zhilkin Sergey
Re: [9fans] Failed 'reject' function?
Hi Sergey, It seems, you do it incorrectly :) dial(2) has an exact example if using announce/listen/accept functions. I do exactly what I need. ;) The sequence announce/listen/accept is very well known to me. But I need both possibilities: - accept incoming connection - reject incoming connection, which failed. Thank to Charles, I finally understood. Pavel
Re: [9fans] Failed 'reject' function?
On 10 October 2014 10:28, Pavel Klinkovský pavel.klinkov...@gmail.com wrote: reject incoming connection, which failed. reject should probably swallow the error return from the ctl file write, as accept does, until tcp/ip and others interpret the control request and either reset the connection there, or ignore the request and act on the close.
[9fans] Anonymous function formal parameter
Hello,
in sys/src/cmd/eqn/text.c a function definition starts with
int
trans(int c, char *)
{
What does that mean (i.e. how is the second function parameter referenced?
Carsten
Re: [9fans] [Solved] Anonymous function formal parameter
int
trans(int c, char *)
{
That parameter seems not to be used inside. That may answer the question...
Carsten
[9fans] DNS/DHCP/AUTH with Raspberry Pi?
Hello, I'm new to Plan9, using acme/p9p for a couple of months, and I want to add plan9 machines to my network. I'm thinking that a DNS/DHCP/AUTH server will be an easy step. If this machine could have the role of an Internet firewall/nat-router it will be even better. Do you think plan9+raspi can handle this? What is the recommended size for the SD card for this role? Do you recommend other hardware? I don't know what tasks need console access during maintenance. I'll be grateful for any pointers, links and advises. Thank you.
[9fans] neqn not found
Hello, is there no neqn on Plan9? Carsten
Re: [9fans] neqn not found
Quoting Carsten Kunze carsten.ku...@arcor.de: Hello, is there no neqn on Plan9? Carsten neqn just runs eqn with -Tascii. Plan 9 uses UTF-8 and eqn has -Tutf as the default. khm
Re: [9fans] [Solved] Anonymous function formal parameter
int
trans(int c, char *)
{
That parameter seems not to be used inside. That may answer
the question...
Yes, that is the answer. By alowing a parameter name to be
omitted, the compiler can warn you about unused parameters
without having to add clutter that explicitly says, I'm ignoring
this parameter.
BLS
Re: [9fans] DNS/DHCP/AUTH with Raspberry Pi?
I'm new to Plan9, using acme/p9p for a couple of months, and I want to add plan9 machines to my network. I'm thinking that a DNS/DHCP/AUTH server will be an easy step. If this machine could have the role of an Internet firewall/nat-router it will be even better. Do you think plan9+raspi can handle this? While I haven't set one up like this myself, I'm tempted to do so. I expect the Pi would make a very nice little auth/dhcp/etc server. However, to my knowledge, there aren't any NAT implementations available on Plan 9. I know it's been worked on by several people at different times, but I don't think anyone has a currently packaged implementation. What is the recommended size for the SD card for this role? The databases used for these functions are pretty small, so I'd be surprised if you filled a 1G card. BLS
Re: [9fans] DNS/DHCP/AUTH with Raspberry Pi?
I think the raspberry pi disk image that is available is 2GB, so it's probably easiest if you have at least that. On 10 October 2014 09:41, Brian L. Stuart blstu...@bellsouth.net wrote: I'm new to Plan9, using acme/p9p for a couple of months, and I want to add plan9 machines to my network. I'm thinking that a DNS/DHCP/AUTH server will be an easy step. If this machine could have the role of an Internet firewall/nat-router it will be even better. Do you think plan9+raspi can handle this? While I haven't set one up like this myself, I'm tempted to do so. I expect the Pi would make a very nice little auth/dhcp/etc server. However, to my knowledge, there aren't any NAT implementations available on Plan 9. I know it's been worked on by several people at different times, but I don't think anyone has a currently packaged implementation. What is the recommended size for the SD card for this role? The databases used for these functions are pretty small, so I'd be surprised if you filled a 1G card. BLS
Re: [9fans] DNS/DHCP/AUTH with Raspberry Pi?
sounds like an excellent idea, only one pain, the auth server uses the console for its config you could use erik's con Ethernet console driver so you can configure it from another plan system, or even dial into the pi and connect back in via con. this is not referred though, ideally you should not bye able to cup into the auth server, for security reasons. it's hard to hack a machine that doesn't allow logins. -Steve On 10 Oct 2014, at 13:56, brank...@hushmail.com wrote: Hello, I'm new to Plan9, using acme/p9p for a couple of months, and I want to add plan9 machines to my network. I'm thinking that a DNS/DHCP/AUTH server will be an easy step. If this machine could have the role of an Internet firewall/nat-router it will be even better. Do you think plan9+raspi can handle this? What is the recommended size for the SD card for this role? Do you recommend other hardware? I don't know what tasks need console access during maintenance. I'll be grateful for any pointers, links and advises. Thank you.
Re: [9fans] DNS/DHCP/AUTH with Raspberry Pi?
you could use erik's con Ethernet console driver so you can configure it from another plan system, or even dial into the pi and connect back in via con. cec(1), which is implemented in 9atom. - erik
Re: [9fans] DNS/DHCP/AUTH with Raspberry Pi?
cec(1) oops, yep, that's the one. On 10 Oct 2014, at 22:08, erik quanstrom quans...@quanstro.net wrote: you could use erik's con Ethernet console driver so you can configure it from another plan system, or even dial into the pi and connect back in via con. cec(1), which is implemented in 9atom. - erik
