search for: channel_connect_stdio_fwd

https://bugzilla.mindrot.org/show_bug.cgi?id=2416 Bug ID: 2416 Summary: [PATCH] Allow forwarding of stdio to streamlocal end points Product: Portable OpenSSH Version: -current Hardware: Other OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: ssh

...011-March/029441.html there is some strange interaction between ControlPersist and ssh -W that breaks things if you're using both. Specifically, ssh -W host:port with ControlPersist enabled opens up two connections to host:port and sends data from both back. I think this is happening because channel_connect_stdio_fwd is being called twice, once in client_setup_stdio_fwd, which is called from ssh_init_forwarding, and once in process_mux_stdio_fwd, which is called once the client process starts talking to the master process. It looks like the way ControlPersist is implemented, the process forks, with the child b...

...t>) at /usr/src/debug/openssh-6.5p1-1/canohost.c:292 #2 0x0000000100418db5 in port_open_helper (c=c at entry=0x600074700, rtype=rtype at entry=0x10045fe0d <log_facilities+301> "direct-tcpip") at /usr/src/debug/openssh-6.5p1-1/channels.c:1388 #3 0x000000010041dc07 in channel_connect_stdio_fwd ( host_to_connect=0x600039800 "machine2", port_to_connect=22, in=in at entry=4, out=5) at /usr/src/debug/openssh-6.5p1-1/channels.c:1269 #4 0x0000000100401566 in ssh_init_stdio_forwarding () at /usr/src/debug/openssh-6.5p1-1/ssh.c:1260 #5 0x0000000100454171 in ssh_session2 (...

...as triggered by the new calls to get_sock_port from port_open_helper in https://anongit.mindrot.org/openssh.git/commit/?id=4def184; gdb shows that c->sock is -1 here. Full -vvv output in the Debian bug; relevant-looking excerpt: debug3: ssh_init_stdio_forwarding: server2.example.net:22 debug1: channel_connect_stdio_fwd server2.example.net:22 debug1: channel 0: new [stdio-forward] debug2: fd 4 setting O_NONBLOCK debug3: fd 5 is O_NONBLOCK getsockname failed: Bad file descriptor debug1: getpeername failed: Bad file descriptor It looks like it still works fine, but the extra non-debug error is annoying. -- You ar...

...011-March/029441.html there is some strange interaction between ControlPersist and ssh -W that breaks things if you're using both. Specifically, ssh -W host:port with ControlPersist enabled opens up two connections to host:port and sends data from both back. I think this is happening because channel_connect_stdio_fwd is being called twice, once in client_setup_stdio_fwd, which is called from ssh_init_forwarding, and once in process_mux_stdio_fwd, which is called once the client process starts talking to the master process. It looks like the way ControlPersist is implemented, the process forks, with the child b...

...target Port 22 User user IdentityFile ~/.ssh/user-target_ed25519 ssh target/remote (check ss -lant4 in second terminal: no listener on port 1080) (exit ssh session) cat sshpc.log [...] Authenticated to my.dynamicdns.com ([12.34.56.78]:2222). debug3: ssh_init_stdio_forwarding: router:22 debug1: channel_connect_stdio_fwd router:22 debug1: channel 0: new [stdio-forward] debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: getpeername failed: Bad file descriptor debug3: send packet: type 90 debug2: fd 3 setting TCP_NODELAY debug3: ssh_packet_set_tos: set IP_TOS 0x10 debug1: Requesting no-more-sessi...

On Sun, Jul 5, 2015 at 3:26 AM, Damien Miller <djm at mindrot.org> wrote: > On Sat, 4 Jul 2015, Peng Yu wrote: > >> I tried the following command. >> >> ssh -Y -t intermediate -- ssh -Y dest >> >> But it shows the following error message. Does anybody know how to fix >> the problem? Thanks. > > ssh -oProxyCommand="ssh -W %h:%p

...2_MSG_IGNORE debug1: Server accepts key: pkalg ssh-rsa blen 533 debug2: input_userauth_pk_ok: fp 46:bb:2a:c2:29:72:ad:bc:a7:04:c8:8d:77:31:6f:5e debug3: sign_and_send_pubkey debug3: Received SSH2_MSG_IGNORE debug1: Authentication succeeded (publickey). debug3: client_setup_stdio_fwd cfe1:22 debug1: channel_connect_stdio_fwd cfe1:22 debug1: channel 0: new [stdio-forward] debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: getpeername failed: Bad file descriptor debug1: Entering interactive session. debug3: Received SSH2_MSG_IGNORE channel 0: open failed: connect failed: No description debug2: channe...

...rint_adm_permitted_opens(void); Channel *channel_connect_to_port(const char *, u_short, char *, char *, int *, const char **); -Channel *channel_connect_to_path(const char *, char *, char *); +Channel *channel_connect_to_path(const char *, char *, char *, struct ForwardOptions *); Channel *channel_connect_stdio_fwd(const char*, u_short, int, int); Channel *channel_connect_by_listen_address(const char *, u_short, char *, char *); diff --git a/misc.h b/misc.h index c242f90..99341f6 100644 --- a/misc.h +++ b/misc.h @@ -38,6 +38,7 @@ struct ForwardOptions { int gateway_ports; /* Allow remote connects t...