search for: connection_out

Hi, I'm a newbie to openssh and was trying to read the source code recently. Could anyone tell me why in sshd the connection_in and connection_out are the same(seems to be integer 3 in my machine). connection_in is used in process_input(readset), and connection_out is used in process_output(writeset); But how does it work if it tries to read and write from the same file descriptor? /Bob

...p1/sshconnect.c.original openssh-6.6p1/sshconnect.c --- openssh-6.6p1/sshconnect.c.original 2015-05-23 11:56:55.235217137 +0200 +++ openssh-6.6p1/sshconnect.c 2015-05-23 13:43:41.426983727 +0200 @@ -515,12 +515,13 @@ ssh_connect(const char *host, struct add } static void -send_client_banner(int connection_out, int minor1) +send_client_banner(int connection_out, int minor1, const char *host) { /* Send our own protocol version identification. */ if (compat20) { - xasprintf(&client_version_string, "SSH-%d.%d-%.100s\r\n", - PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2, SSH_VERSION); + xaspri...

...packet_read_poll2(payload_len_ptr): packet_read_poll1(payload_len_ptr); + idletimeout_check(type); if(compat20) { int reason; if (type != 0) @@ -1217,12 +1301,12 @@ sizeof(fd_mask)); packet_write_poll(); while (packet_have_data_to_write()) { - memset(setp, 0, howmany(connection_out + 1, NFDBITS) * - sizeof(fd_mask)); - FD_SET(connection_out, setp); - while (select(connection_out + 1, NULL, setp, NULL, NULL) == -1 && - (errno == EAGAIN || errno == EINTR)) - ; + do { + memset(setp, 0, howmany(connection_out + 1, NFDBITS) * + sizeo...

...data going to the client, mark that @@ -278,6 +319,8 @@ error("select: %.100s", strerror(errno)); } else if (ret == 0 && client_alive_scheduled) client_alive_check(); + + notify_done(*readsetp); } /* @@ -467,6 +510,8 @@ connection_in = packet_get_connection_in(); connection_out = packet_get_connection_out(); + notify_setup(); + previous_stdout_buffer_bytes = 0; /* Set approximate I/O buffer size. */ @@ -572,6 +617,7 @@ max_fd = MAX(max_fd, fdin); max_fd = MAX(max_fd, fdout); max_fd = MAX(max_fd, fderr); + max_fd = MAX(max_fd, notify_pipe[0]); /* Sle...

...e proxy + * + * this nice patch was brought to you by Leif Jakob <openssh at jakob.weite-welt.com>, don't blame me + * if someone is abusing your misconfigured proxies :) but some broken firewalls require this feature + */ +void +https_proxy_handshake(const char *connect_string) +{ + int connection_out = packet_get_connection_out(); + +#define PROXY1 "CONNECT " +#define PROXY3 " HTTP/1.0\r\n\r\n" + + if (atomicio(write, connection_out, PROXY1, sizeof(PROXY1)-1) != sizeof(PROXY1)-1) + fatal("write proxy1: %.100s", strerror(errno)); + + if (atomicio(write, connect...

...*server_version_string = NULL; -struct sshkey *previous_host_key = NULL; +static struct sshkey *previous_host_key = NULL; static int matching_host_key_dns = 0; @@ -605,16 +603,16 @@ ssh_connect(struct ssh *ssh, const char *host, struct addrinfo *addrs, } static void -send_client_banner(int connection_out, int minor1) +send_client_banner(int connection_out, int minor1, char **client_version_stringp) { /* Send our own protocol version identification. */ - xasprintf(&client_version_string, "SSH-%d.%d-%.100s\r\n", + xasprintf(client_version_stringp, "SSH-%d.%d-%.100s\r\n",...

...else { + else if(tv.tv_sec == 0 && tv.tv_usec == 0) { tv.tv_sec = options.server_alive_interval; tv.tv_usec = 0; tvp = &tv; } ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); + if(FD_ISSET(connection_out, *readsetp)) { + tv.tv_sec = 0; + tv.tv_usec = 0; + } if (ret < 0) { char buf[100];

Hello, I am testing ssh with occasional network disconnection between server and client during these days. I found ssh sometimes hangs if the disconnection happens after the connection is established but before ssh_exchange_identification completes. The ssh configuration files show that both client and server alive options are set. In /etc/ssh/ssh_config: # Send keepalive messages to the server.

Dear OpenSSH Portable sshd developers, I'm having a problem where sshd login sessions are occasionally (as often as once a day) getting stuck indefinitely. I enabled debug messages and got a backtrace of a stuck sshd, and I think I've found the bug. I wanted to run it by the list once before filing. sshd version: OpenSSH_4.2p1 FreeBSD-20050903, OpenSSL 0.9.7e-p1 25 Oct 2004

Hi folks, I'm currently trying to connect to version 1.2.16 of the commercial server. The server says it supports protocol version 1.4 and that that is incompatible with protocol version 1.5. Is that actually true? The complete output from "ssh -v xxxxxxx" is: $ ./ssh -v xxxxxxx SSH Version OpenSSH_2.3.0p1, protocol versions 1.5/2.0. Compiled with SSL (0x0090581f). debug:

https://bugzilla.mindrot.org/show_bug.cgi?id=2139 Bug ID: 2139 Summary: re-exec fallback problem Product: Portable OpenSSH Version: -current Hardware: Other OS: FreeBSD Status: NEW Severity: minor Priority: P5 Component: sshd Assignee: unassigned-bugs at mindrot.org

...cket.c openssh-1.2.1pre27/packet.c --- old/openssh-1.2.1pre27/packet.c Thu Jan 13 22:45:50 2000 +++ openssh-1.2.1pre27/packet.c Sat Jan 22 10:32:14 2000 @@ -138,6 +138,8 @@ struct sockaddr_storage to; socklen_t tolen; + tolen = sizeof(to); + memset(&to, 0, sizeof(to)); if (getsockname(connection_out, (struct sockaddr *)&to, &tolen) < 0) return 0;

...appreciated. Regards, Paul Tiemann //------------- Here's a code snip from the sshconnect.c file below void ssh_exchange_identification() { char buf[256], remote_version[256]; /* must be same size! */ int remote_major, remote_minor, i; int connection_in = packet_get_connection_in(); int connection_out = packet_get_connection_out(); /* Read other side\'s version identification. */ for (i = 0; i < sizeof(buf) - 1; i++) { buf[i + 1] = 0; if (read(connection_in, &buf[i], 1) != 1) fatal("ssh_exchange_identification: read: %.100s", strerror(errno)); if (buf[i] == ...

....c Thu Jun 22 13:32:31 2000 +++ openssh-2.1.1p2/packet.c Mon Jul 10 15:28:10 2000 @@ -48,6 +48,10 @@ #define DBG(x) #endif +#ifdef SNI +#undef IP_TOS +#endif + /* * This variable contains the file descriptors used for communicating with * the other side. connection_in is used for reading; connection_out for

Hi, I noticed that the Type of Service bit for minimize delay is set in client->server packets only. Is this OS-specific or is there another reason for this? Here is a tcpdump of an interactive connection: 217.225.98.212.22 > 134.169.34.19.45870: P 1:49(48) ack 48 win 12008 (DF) 134.169.34.19.45870 > 217.225.98.212.22: P 48:96(48) ack 49 win 25416 (DF) [tos 0x10] 217.225.98.212.22

...+ static void + grace_alarm_handler(int sig) + { + /* Log error and exit. */ + fatal("Timeout before authentication"); } + + /* * Waits for the server identification string, and sends our own * identification string. */ *************** *** 441,446 **** --- 451,462 ---- int connection_out = packet_get_connection_out(); int minor1 = PROTOCOL_MINOR_1; + /* Setup a handler for banner prompt */ + if (options.connection_timeout > 0) { + signal(SIGALRM, grace_alarm_handler); + alarm(options.connection_timeout); + } + /* Read other side\'s version identification....

...ns; /* * Initializes the server options to special values that indicate that they diff -ru openssh-2.9p2.orig/serverloop.c openssh-2.9p2/serverloop.c --- openssh-2.9p2.orig/serverloop.c Sat Apr 14 02:28:03 2001 +++ openssh-2.9p2/serverloop.c Thu Aug 16 14:12:14 2001 @@ -79,7 +79,8 @@ static int connection_out; /* Connection to client (output). */ static int connection_closed = 0; /* Connection to client closed. */ static u_int buffer_high; /* "Soft" max buffer size. */ - +static time_t idletime_last=0; /* The last time something happened + * for idletimeout. */ /* * This SIGCHLD kludge...

...low some lines before getting + the SSH-%d.%d identification string */ + #define FIREWALL_CHATTER_LINES 10 + /* Session id for the current session. */ unsigned char session_id[16]; *************** *** 896,902 **** --- 902,910 ---- int connection_in = packet_get_connection_in(); int connection_out = packet_get_connection_out(); extern Options options; + int chatter; + for (chatter = 0; chatter < FIREWALL_CHATTER_LINES; chatter++) { /* Read other side\'s version identification. */ for (i = 0; i < sizeof(buf) - 1; i++) { if (read(...

....math.ualberta.ca/~bowman diff -ur openssh-2.9p1/clientloop.c openssh-2.9p1S/clientloop.c --- openssh-2.9p1/clientloop.c Fri Apr 20 06:50:51 2001 +++ openssh-2.9p1S/clientloop.c Thu May 17 21:41:44 2001 @@ -121,8 +121,8 @@ static int connection_in; /* Connection to server (input). */ static int connection_out; /* Connection to server (output). */ static int need_rekeying; /* Set to non-zero if rekeying is requested. */ -static int session_closed = 0; /* In SSH2: login session closed. */ - +enum SessionStatus {SessionOpen, SessionClose, SessionWait}; +static int session_status = SessionOpen; /* In SSH2:...

...50:11 2002 @@ -84,6 +84,7 @@ /* import options */ extern Options options; +extern int no_tty_flag; /* Flag indicating that stdin should be redirected from /dev/null. */ extern int stdin_null_flag; @@ -122,7 +123,8 @@ static int connection_in; /* Connection to server (input). */ static int connection_out; /* Connection to server (output). */ static int need_rekeying; /* Set to non-zero if rekeying is requested. */ -static int session_closed = 0; /* In SSH2: login session closed. */ +enum SessionStatus {SessionOpen, SessionClose, SessionWait}; +static int session_status = SessionOpen; /* In SSH2: l...