X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/95077f4831c4ae1da351a058e690c4f90ffd14c2..f666dcfa41a9a4bebf8dec0b667efae446908e8a:/serverloop.c diff --git a/serverloop.c b/serverloop.c index 20255aae..d2eff170 100644 --- a/serverloop.c +++ b/serverloop.c @@ -35,7 +35,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: serverloop.c,v 1.113 2003/11/18 00:40:05 dtucker Exp $"); +RCSID("$OpenBSD: serverloop.c,v 1.118 2005/07/17 07:17:55 djm Exp $"); #include "xmalloc.h" #include "packet.h" @@ -212,26 +212,23 @@ make_packets_from_stdout_data(void) static void client_alive_check(void) { - static int had_channel = 0; - int id; - - id = channel_find_open(); - if (id == -1) { - if (!had_channel) - return; - packet_disconnect("No open channels after timeout!"); - } - had_channel = 1; + int channel_id; /* timeout, check to see how many we have had */ if (++client_alive_timeouts > options.client_alive_count_max) packet_disconnect("Timeout, your session not responding."); /* - * send a bogus channel request with "wantreply", + * send a bogus global/channel request with "wantreply", * we should get back a failure */ - channel_request_start(id, "keepalive@openssh.com", 1); + if ((channel_id = channel_find_open()) == -1) { + packet_start(SSH2_MSG_GLOBAL_REQUEST); + packet_put_cstring("keepalive@openssh.com"); + packet_put_char(1); /* boolean: want reply */ + } else { + channel_request_start(channel_id, "keepalive@openssh.com", 1); + } packet_send(); } @@ -243,7 +240,7 @@ client_alive_check(void) */ static void wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, - int *nallocp, u_int max_time_milliseconds) + u_int *nallocp, u_int max_time_milliseconds) { struct timeval tv, *tvp; int ret; @@ -489,7 +486,8 @@ void server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) { fd_set *readset = NULL, *writeset = NULL; - int max_fd = 0, nalloc = 0; + int max_fd = 0; + u_int nalloc = 0; int wait_status; /* Status returned by wait(). */ pid_t wait_pid; /* pid returned by wait(). */ int waiting_termination = 0; /* Have displayed waiting close message. */ @@ -797,9 +795,9 @@ server_loop2(Authctxt *authctxt) } static void -server_input_channel_failure(int type, u_int32_t seq, void *ctxt) +server_input_keep_alive(int type, u_int32_t seq, void *ctxt) { - debug("Got CHANNEL_FAILURE for keepalive"); + debug("Got %d/%u for keepalive", type, seq); /* * reset timeout, since we got a sane answer from the client. * even if this was generated by something other than @@ -808,7 +806,6 @@ server_input_channel_failure(int type, u_int32_t seq, void *ctxt) client_alive_timeouts = 0; } - static void server_input_stdin_data(int type, u_int32_t seq, void *ctxt) { @@ -854,7 +851,7 @@ server_input_window_size(int type, u_int32_t seq, void *ctxt) } static Channel * -server_request_direct_tcpip(char *ctype) +server_request_direct_tcpip(void) { Channel *c; int sock; @@ -868,7 +865,7 @@ server_request_direct_tcpip(char *ctype) packet_check_eom(); debug("server_request_direct_tcpip: originator %s port %d, target %s port %d", - originator, originator_port, target, target_port); + originator, originator_port, target, target_port); /* XXX check permission */ sock = channel_connect_to(target, target_port); @@ -876,14 +873,14 @@ server_request_direct_tcpip(char *ctype) xfree(originator); if (sock < 0) return NULL; - c = channel_new(ctype, SSH_CHANNEL_CONNECTING, + c = channel_new("direct-tcpip", SSH_CHANNEL_CONNECTING, sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "direct-tcpip", 1); return c; } static Channel * -server_request_session(char *ctype) +server_request_session(void) { Channel *c; @@ -895,7 +892,7 @@ server_request_session(char *ctype) * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all * CHANNEL_REQUEST messages is registered. */ - c = channel_new(ctype, SSH_CHANNEL_LARVAL, + c = channel_new("session", SSH_CHANNEL_LARVAL, -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, 0, "server-session", 1); if (session_open(the_authctxt, c->self) != 1) { @@ -924,9 +921,9 @@ server_input_channel_open(int type, u_int32_t seq, void *ctxt) ctype, rchan, rwindow, rmaxpack); if (strcmp(ctype, "session") == 0) { - c = server_request_session(ctype); + c = server_request_session(); } else if (strcmp(ctype, "direct-tcpip") == 0) { - c = server_request_direct_tcpip(ctype); + c = server_request_direct_tcpip(); } if (c != NULL) { debug("server_input_channel_open: confirm %s", ctype); @@ -986,7 +983,7 @@ server_input_global_request(int type, u_int32_t seq, void *ctxt) #ifndef NO_IPPORT_RESERVED_CONCEPT || (listen_port < IPPORT_RESERVED && pw->pw_uid != 0) #endif - ) { + ) { success = 0; packet_send_debug("Server has disabled port forwarding."); } else { @@ -995,6 +992,17 @@ server_input_global_request(int type, u_int32_t seq, void *ctxt) listen_address, listen_port, options.gateway_ports); } xfree(listen_address); + } else if (strcmp(rtype, "cancel-tcpip-forward") == 0) { + char *cancel_address; + u_short cancel_port; + + cancel_address = packet_get_string(NULL); + cancel_port = (u_short)packet_get_int(); + debug("%s: cancel-tcpip-forward addr %s port %d", __func__, + cancel_address, cancel_port); + + success = channel_cancel_rport_listener(cancel_address, + cancel_port); } if (want_reply) { packet_start(success ? @@ -1048,7 +1056,9 @@ server_init_dispatch_20(void) dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request); /* client_alive */ - dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_channel_failure); + dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_keep_alive); + dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &server_input_keep_alive); + dispatch_set(SSH2_MSG_REQUEST_FAILURE, &server_input_keep_alive); /* rekeying */ dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); }