/* * Packet protocol layer for the SSH-1 'connection protocol', i.e. * everything after authentication finishes. */ #include #include "putty.h" #include "ssh.h" #include "sshbpp.h" #include "sshppl.h" #include "sshchan.h" #include "sshcr.h" #include "ssh1connection.h" static int ssh1_rportfwd_cmp(void *av, void *bv) { struct ssh_rportfwd *a = (struct ssh_rportfwd *) av; struct ssh_rportfwd *b = (struct ssh_rportfwd *) bv; int i; if ( (i = strcmp(a->dhost, b->dhost)) != 0) return i < 0 ? -1 : +1; if (a->dport > b->dport) return +1; if (a->dport < b->dport) return -1; return 0; } static void ssh1_connection_free(PacketProtocolLayer *); static void ssh1_connection_process_queue(PacketProtocolLayer *); static void ssh1_connection_special_cmd(PacketProtocolLayer *ppl, SessionSpecialCode code, int arg); static bool ssh1_connection_want_user_input(PacketProtocolLayer *ppl); static void ssh1_connection_got_user_input(PacketProtocolLayer *ppl); static void ssh1_connection_reconfigure(PacketProtocolLayer *ppl, Conf *conf); static const struct PacketProtocolLayerVtable ssh1_connection_vtable = { ssh1_connection_free, ssh1_connection_process_queue, ssh1_common_get_specials, ssh1_connection_special_cmd, ssh1_connection_want_user_input, ssh1_connection_got_user_input, ssh1_connection_reconfigure, NULL /* no layer names in SSH-1 */, }; static void ssh1_rportfwd_remove( ConnectionLayer *cl, struct ssh_rportfwd *rpf); static SshChannel *ssh1_lportfwd_open( ConnectionLayer *cl, const char *hostname, int port, const char *description, const SocketPeerInfo *pi, Channel *chan); static struct X11FakeAuth *ssh1_add_x11_display( ConnectionLayer *cl, int authtype, struct X11Display *disp); static bool ssh1_agent_forwarding_permitted(ConnectionLayer *cl); static void ssh1_terminal_size(ConnectionLayer *cl, int width, int height); static void ssh1_stdout_unthrottle(ConnectionLayer *cl, size_t bufsize); static size_t ssh1_stdin_backlog(ConnectionLayer *cl); static void ssh1_throttle_all_channels(ConnectionLayer *cl, bool throttled); static bool ssh1_ldisc_option(ConnectionLayer *cl, int option); static void ssh1_set_ldisc_option(ConnectionLayer *cl, int option, bool value); static void ssh1_enable_x_fwd(ConnectionLayer *cl); static void ssh1_enable_agent_fwd(ConnectionLayer *cl); static void ssh1_set_wants_user_input(ConnectionLayer *cl, bool wanted); static const struct ConnectionLayerVtable ssh1_connlayer_vtable = { ssh1_rportfwd_alloc, ssh1_rportfwd_remove, ssh1_lportfwd_open, ssh1_session_open, ssh1_serverside_x11_open, ssh1_serverside_agent_open, ssh1_add_x11_display, NULL /* add_sharing_x11_display */, NULL /* remove_sharing_x11_display */, NULL /* send_packet_from_downstream */, NULL /* alloc_sharing_channel */, NULL /* delete_sharing_channel */, NULL /* sharing_queue_global_request */, NULL /* sharing_no_more_downstreams */, ssh1_agent_forwarding_permitted, ssh1_terminal_size, ssh1_stdout_unthrottle, ssh1_stdin_backlog, ssh1_throttle_all_channels, ssh1_ldisc_option, ssh1_set_ldisc_option, ssh1_enable_x_fwd, ssh1_enable_agent_fwd, ssh1_set_wants_user_input, }; static size_t ssh1channel_write( SshChannel *c, bool is_stderr, const void *buf, size_t len); static void ssh1channel_write_eof(SshChannel *c); static void ssh1channel_initiate_close(SshChannel *c, const char *err); static void ssh1channel_unthrottle(SshChannel *c, size_t bufsize); static Conf *ssh1channel_get_conf(SshChannel *c); static void ssh1channel_window_override_removed(SshChannel *c) { /* ignore */ } static const struct SshChannelVtable ssh1channel_vtable = { ssh1channel_write, ssh1channel_write_eof, ssh1channel_initiate_close, ssh1channel_unthrottle, ssh1channel_get_conf, ssh1channel_window_override_removed, NULL /* x11_sharing_handover is only used by SSH-2 connection sharing */, NULL /* send_exit_status */, NULL /* send_exit_signal */, NULL /* send_exit_signal_numeric */, NULL /* request_x11_forwarding */, NULL /* request_agent_forwarding */, NULL /* request_pty */, NULL /* send_env_var */, NULL /* start_shell */, NULL /* start_command */, NULL /* start_subsystem */, NULL /* send_serial_break */, NULL /* send_signal */, NULL /* send_terminal_size_change */, NULL /* hint_channel_is_simple */, }; static void ssh1_channel_try_eof(struct ssh1_channel *c); static void ssh1_channel_close_local(struct ssh1_channel *c, const char *reason); static void ssh1_channel_destroy(struct ssh1_channel *c); static void ssh1_channel_check_close(struct ssh1_channel *c); static int ssh1_channelcmp(void *av, void *bv) { const struct ssh1_channel *a = (const struct ssh1_channel *) av; const struct ssh1_channel *b = (const struct ssh1_channel *) bv; if (a->localid < b->localid) return -1; if (a->localid > b->localid) return +1; return 0; } static int ssh1_channelfind(void *av, void *bv) { const unsigned *a = (const unsigned *) av; const struct ssh1_channel *b = (const struct ssh1_channel *) bv; if (*a < b->localid) return -1; if (*a > b->localid) return +1; return 0; } void ssh1_channel_free(struct ssh1_channel *c) { if (c->chan) chan_free(c->chan); sfree(c); } PacketProtocolLayer *ssh1_connection_new( Ssh *ssh, Conf *conf, ConnectionLayer **cl_out) { struct ssh1_connection_state *s = snew(struct ssh1_connection_state); memset(s, 0, sizeof(*s)); s->ppl.vt = &ssh1_connection_vtable; s->conf = conf_copy(conf); s->channels = newtree234(ssh1_channelcmp); s->x11authtree = newtree234(x11_authcmp); /* Need to get the log context for s->cl now, because we won't be * helpfully notified when a copy is written into s->ppl by our * owner. */ s->cl.vt = &ssh1_connlayer_vtable; s->cl.logctx = ssh_get_logctx(ssh); s->portfwdmgr = portfwdmgr_new(&s->cl); s->rportfwds = newtree234(ssh1_rportfwd_cmp); *cl_out = &s->cl; return &s->ppl; } static void ssh1_connection_free(PacketProtocolLayer *ppl) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); struct X11FakeAuth *auth; struct ssh1_channel *c; struct ssh_rportfwd *rpf; conf_free(s->conf); while ((c = delpos234(s->channels, 0)) != NULL) ssh1_channel_free(c); freetree234(s->channels); if (s->mainchan_chan) chan_free(s->mainchan_chan); if (s->x11disp) x11_free_display(s->x11disp); while ((auth = delpos234(s->x11authtree, 0)) != NULL) x11_free_fake_auth(auth); freetree234(s->x11authtree); while ((rpf = delpos234(s->rportfwds, 0)) != NULL) free_rportfwd(rpf); freetree234(s->rportfwds); portfwdmgr_free(s->portfwdmgr); if (s->antispoof_prompt) free_prompts(s->antispoof_prompt); delete_callbacks_for_context(s); sfree(s); } void ssh1_connection_set_protoflags(PacketProtocolLayer *ppl, int local, int remote) { assert(ppl->vt == &ssh1_connection_vtable); struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); s->local_protoflags = local; s->remote_protoflags = remote; } static bool ssh1_connection_filter_queue(struct ssh1_connection_state *s) { PktIn *pktin; ptrlen data; struct ssh1_channel *c; unsigned localid; bool expect_halfopen; while (1) { if (ssh1_common_filter_queue(&s->ppl)) return true; if ((pktin = pq_peek(s->ppl.in_pq)) == NULL) return false; switch (pktin->type) { case SSH1_MSG_CHANNEL_DATA: case SSH1_MSG_CHANNEL_OPEN_CONFIRMATION: case SSH1_MSG_CHANNEL_OPEN_FAILURE: case SSH1_MSG_CHANNEL_CLOSE: case SSH1_MSG_CHANNEL_CLOSE_CONFIRMATION: /* * Common preliminary code for all the messages from the * server that cite one of our channel ids: look up that * channel id, check it exists, and if it's for a sharing * downstream, pass it on. */ localid = get_uint32(pktin); c = find234(s->channels, &localid, ssh1_channelfind); expect_halfopen = ( pktin->type == SSH1_MSG_CHANNEL_OPEN_CONFIRMATION || pktin->type == SSH1_MSG_CHANNEL_OPEN_FAILURE); if (!c || c->halfopen != expect_halfopen) { ssh_remote_error( s->ppl.ssh, "Received %s for %s channel %u", ssh1_pkt_type(pktin->type), !c ? "nonexistent" : c->halfopen ? "half-open" : "open", localid); return true; } switch (pktin->type) { case SSH1_MSG_CHANNEL_OPEN_CONFIRMATION: assert(c->halfopen); c->remoteid = get_uint32(pktin); c->halfopen = false; c->throttling_conn = false; chan_open_confirmation(c->chan); /* * Now that the channel is fully open, it's possible * in principle to immediately close it. Check whether * it wants us to! * * This can occur if a local socket error occurred * between us sending out CHANNEL_OPEN and receiving * OPEN_CONFIRMATION. If that happens, all we can do * is immediately initiate close proceedings now that * we know the server's id to put in the close * message. We'll have handled that in this code by * having already turned c->chan into a zombie, so its * want_close method (which ssh1_channel_check_close * will consult) will already be returning true. */ ssh1_channel_check_close(c); if (c->pending_eof) ssh1_channel_try_eof(c); /* in case we had a pending EOF */ break; case SSH1_MSG_CHANNEL_OPEN_FAILURE: assert(c->halfopen); chan_open_failed(c->chan, NULL); chan_free(c->chan); del234(s->channels, c); ssh1_channel_free(c); break; case SSH1_MSG_CHANNEL_DATA: data = get_string(pktin); if (!get_err(pktin)) { int bufsize = chan_send( c->chan, false, data.ptr, data.len); if (!c->throttling_conn && bufsize > SSH1_BUFFER_LIMIT) { c->throttling_conn = true; ssh_throttle_conn(s->ppl.ssh, +1); } } break; case SSH1_MSG_CHANNEL_CLOSE: if (!(c->closes & CLOSES_RCVD_CLOSE)) { c->closes |= CLOSES_RCVD_CLOSE; chan_send_eof(c->chan); ssh1_channel_check_close(c); } break; case SSH1_MSG_CHANNEL_CLOSE_CONFIRMATION: if (!(c->closes & CLOSES_RCVD_CLOSECONF)) { if (!(c->closes & CLOSES_SENT_CLOSE)) { ssh_remote_error( s->ppl.ssh, "Received CHANNEL_CLOSE_CONFIRMATION for channel" " %u for which we never sent CHANNEL_CLOSE\n", c->localid); return true; } c->closes |= CLOSES_RCVD_CLOSECONF; ssh1_channel_check_close(c); } break; } pq_pop(s->ppl.in_pq); break; default: if (ssh1_handle_direction_specific_packet(s, pktin)) { pq_pop(s->ppl.in_pq); if (ssh1_check_termination(s)) return true; } else { return false; } } } } static PktIn *ssh1_connection_pop(struct ssh1_connection_state *s) { ssh1_connection_filter_queue(s); return pq_pop(s->ppl.in_pq); } static void ssh1_connection_process_queue(PacketProtocolLayer *ppl) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); PktIn *pktin; if (ssh1_connection_filter_queue(s)) /* no matter why we were called */ return; crBegin(s->crState); /* * Signal the seat that authentication is done, so that it can * deploy spoofing defences. If it doesn't have any, deploy our * own fallback one. * * We do this here rather than at the end of userauth, because we * might not have gone through userauth at all (if we're a * connection-sharing downstream). */ if (ssh1_connection_need_antispoof_prompt(s)) { s->antispoof_prompt = new_prompts(); s->antispoof_prompt->to_server = true; s->antispoof_prompt->from_server = false; s->antispoof_prompt->name = dupstr("Authentication successful"); add_prompt( s->antispoof_prompt, dupstr("Access granted. Press Return to begin session. "), false); s->antispoof_ret = seat_get_userpass_input( s->ppl.seat, s->antispoof_prompt, NULL); while (1) { while (s->antispoof_ret < 0 && bufchain_size(s->ppl.user_input) > 0) s->antispoof_ret = seat_get_userpass_input( s->ppl.seat, s->antispoof_prompt, s->ppl.user_input); if (s->antispoof_ret >= 0) break; s->want_user_input = true; crReturnV; s->want_user_input = false; } free_prompts(s->antispoof_prompt); s->antispoof_prompt = NULL; } portfwdmgr_config(s->portfwdmgr, s->conf); s->portfwdmgr_configured = true; while (!s->finished_setup) { ssh1_connection_direction_specific_setup(s); crReturnV; } while (1) { /* * By this point, most incoming packets are already being * handled by filter_queue, and we need only pay attention to * the unusual ones. */ if ((pktin = ssh1_connection_pop(s)) != NULL) { ssh_proto_error(s->ppl.ssh, "Unexpected packet received, " "type %d (%s)", pktin->type, ssh1_pkt_type(pktin->type)); return; } crReturnV; } crFinishV; } static void ssh1_channel_check_close(struct ssh1_channel *c) { struct ssh1_connection_state *s = c->connlayer; PktOut *pktout; if (c->halfopen) { /* * If we've sent out our own CHANNEL_OPEN but not yet seen * either OPEN_CONFIRMATION or OPEN_FAILURE in response, then * it's too early to be sending close messages of any kind. */ return; } if ((!((CLOSES_SENT_CLOSE | CLOSES_RCVD_CLOSE) & ~c->closes) || chan_want_close(c->chan, (c->closes & CLOSES_SENT_CLOSE), (c->closes & CLOSES_RCVD_CLOSE))) && !(c->closes & CLOSES_SENT_CLOSECONF)) { /* * We have both sent and received CLOSE (or the channel type * doesn't need us to), which means the channel is in final * wind-up. Send CLOSE and/or CLOSE_CONFIRMATION, whichever we * haven't sent yet. */ if (!(c->closes & CLOSES_SENT_CLOSE)) { pktout = ssh_bpp_new_pktout(s->ppl.bpp, SSH1_MSG_CHANNEL_CLOSE); put_uint32(pktout, c->remoteid); pq_push(s->ppl.out_pq, pktout); c->closes |= CLOSES_SENT_CLOSE; } if (c->closes & CLOSES_RCVD_CLOSE) { pktout = ssh_bpp_new_pktout( s->ppl.bpp, SSH1_MSG_CHANNEL_CLOSE_CONFIRMATION); put_uint32(pktout, c->remoteid); pq_push(s->ppl.out_pq, pktout); c->closes |= CLOSES_SENT_CLOSECONF; } } if (!((CLOSES_SENT_CLOSECONF | CLOSES_RCVD_CLOSECONF) & ~c->closes)) { /* * We have both sent and received CLOSE_CONFIRMATION, which * means we're completely done with the channel. */ ssh1_channel_destroy(c); } } static void ssh1_channel_try_eof(struct ssh1_channel *c) { struct ssh1_connection_state *s = c->connlayer; PktOut *pktout; assert(c->pending_eof); /* precondition for calling us */ if (c->halfopen) return; /* can't close: not even opened yet */ c->pending_eof = false; /* we're about to send it */ pktout = ssh_bpp_new_pktout(s->ppl.bpp, SSH1_MSG_CHANNEL_CLOSE); put_uint32(pktout, c->remoteid); pq_push(s->ppl.out_pq, pktout); c->closes |= CLOSES_SENT_CLOSE; ssh1_channel_check_close(c); } /* * Close any local socket and free any local resources associated with * a channel. This converts the channel into a zombie. */ static void ssh1_channel_close_local(struct ssh1_channel *c, const char *reason) { struct ssh1_connection_state *s = c->connlayer; PacketProtocolLayer *ppl = &s->ppl; /* for ppl_logevent */ const char *msg = chan_log_close_msg(c->chan); if (msg != NULL) ppl_logevent("%s%s%s", msg, reason ? " " : "", reason ? reason : ""); chan_free(c->chan); c->chan = zombiechan_new(); } static void ssh1_check_termination_callback(void *vctx) { struct ssh1_connection_state *s = (struct ssh1_connection_state *)vctx; ssh1_check_termination(s); } static void ssh1_channel_destroy(struct ssh1_channel *c) { struct ssh1_connection_state *s = c->connlayer; ssh1_channel_close_local(c, NULL); del234(s->channels, c); ssh1_channel_free(c); /* * If that was the last channel left open, we might need to * terminate. But we'll be a bit cautious, by doing that in a * toplevel callback, just in case anything on the current call * stack objects to this entire PPL being freed. */ queue_toplevel_callback(ssh1_check_termination_callback, s); } bool ssh1_check_termination(struct ssh1_connection_state *s) { /* * Decide whether we should terminate the SSH connection now. * Called after a channel goes away, or when the main session * returns SSH1_SMSG_EXIT_STATUS; we terminate when none of either * is left. */ if (s->session_terminated && count234(s->channels) == 0) { PktOut *pktout = ssh_bpp_new_pktout( s->ppl.bpp, SSH1_CMSG_EXIT_CONFIRMATION); pq_push(s->ppl.out_pq, pktout); ssh_user_close(s->ppl.ssh, "Session finished"); return true; } return false; } /* * Set up most of a new ssh1_channel. Leaves chan untouched (since it * will sometimes have been filled in before calling this). */ void ssh1_channel_init(struct ssh1_channel *c) { struct ssh1_connection_state *s = c->connlayer; c->closes = 0; c->pending_eof = false; c->throttling_conn = false; c->sc.vt = &ssh1channel_vtable; c->sc.cl = &s->cl; c->localid = alloc_channel_id(s->channels, struct ssh1_channel); add234(s->channels, c); } static Conf *ssh1channel_get_conf(SshChannel *sc) { struct ssh1_channel *c = container_of(sc, struct ssh1_channel, sc); struct ssh1_connection_state *s = c->connlayer; return s->conf; } static void ssh1channel_write_eof(SshChannel *sc) { struct ssh1_channel *c = container_of(sc, struct ssh1_channel, sc); if (c->closes & CLOSES_SENT_CLOSE) return; c->pending_eof = true; ssh1_channel_try_eof(c); } static void ssh1channel_initiate_close(SshChannel *sc, const char *err) { struct ssh1_channel *c = container_of(sc, struct ssh1_channel, sc); char *reason; reason = err ? dupprintf("due to local error: %s", err) : NULL; ssh1_channel_close_local(c, reason); sfree(reason); c->pending_eof = false; /* this will confuse a zombie channel */ ssh1_channel_check_close(c); } static void ssh1channel_unthrottle(SshChannel *sc, size_t bufsize) { struct ssh1_channel *c = container_of(sc, struct ssh1_channel, sc); struct ssh1_connection_state *s = c->connlayer; if (c->throttling_conn && bufsize <= SSH1_BUFFER_LIMIT) { c->throttling_conn = false; ssh_throttle_conn(s->ppl.ssh, -1); } } static size_t ssh1channel_write( SshChannel *sc, bool is_stderr, const void *buf, size_t len) { struct ssh1_channel *c = container_of(sc, struct ssh1_channel, sc); struct ssh1_connection_state *s = c->connlayer; assert(!(c->closes & CLOSES_SENT_CLOSE)); PktOut *pktout = ssh_bpp_new_pktout(s->ppl.bpp, SSH1_MSG_CHANNEL_DATA); put_uint32(pktout, c->remoteid); put_string(pktout, buf, len); pq_push(s->ppl.out_pq, pktout); /* * In SSH-1 we can return 0 here - implying that channels are * never individually throttled - because the only circumstance * that can cause throttling will be the whole SSH connection * backing up, in which case _everything_ will be throttled as a * whole. */ return 0; } static struct X11FakeAuth *ssh1_add_x11_display( ConnectionLayer *cl, int authtype, struct X11Display *disp) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); struct X11FakeAuth *auth = x11_invent_fake_auth(s->x11authtree, authtype); auth->disp = disp; return auth; } static SshChannel *ssh1_lportfwd_open( ConnectionLayer *cl, const char *hostname, int port, const char *description, const SocketPeerInfo *pi, Channel *chan) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); PacketProtocolLayer *ppl = &s->ppl; /* for ppl_logevent */ struct ssh1_channel *c = snew(struct ssh1_channel); PktOut *pktout; c->connlayer = s; ssh1_channel_init(c); c->halfopen = true; c->chan = chan; ppl_logevent("Opening connection to %s:%d for %s", hostname, port, description); pktout = ssh_bpp_new_pktout(s->ppl.bpp, SSH1_MSG_PORT_OPEN); put_uint32(pktout, c->localid); put_stringz(pktout, hostname); put_uint32(pktout, port); /* originator string would go here, but we didn't specify * SSH_PROTOFLAG_HOST_IN_FWD_OPEN */ pq_push(s->ppl.out_pq, pktout); return &c->sc; } static void ssh1_rportfwd_remove(ConnectionLayer *cl, struct ssh_rportfwd *rpf) { /* * We cannot cancel listening ports on the server side in SSH-1! * There's no message to support it. */ } static bool ssh1_agent_forwarding_permitted(ConnectionLayer *cl) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); return conf_get_bool(s->conf, CONF_agentfwd) && agent_exists(); } static void ssh1_connection_special_cmd(PacketProtocolLayer *ppl, SessionSpecialCode code, int arg) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); PktOut *pktout; if (code == SS_PING || code == SS_NOP) { if (!(s->ppl.remote_bugs & BUG_CHOKES_ON_SSH1_IGNORE)) { pktout = ssh_bpp_new_pktout(s->ppl.bpp, SSH1_MSG_IGNORE); put_stringz(pktout, ""); pq_push(s->ppl.out_pq, pktout); } } else if (s->mainchan) { mainchan_special_cmd(s->mainchan, code, arg); } } static void ssh1_terminal_size(ConnectionLayer *cl, int width, int height) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); s->term_width = width; s->term_height = height; if (s->mainchan) mainchan_terminal_size(s->mainchan, width, height); } static void ssh1_stdout_unthrottle(ConnectionLayer *cl, size_t bufsize) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); if (s->stdout_throttling && bufsize < SSH1_BUFFER_LIMIT) { s->stdout_throttling = false; ssh_throttle_conn(s->ppl.ssh, -1); } } static size_t ssh1_stdin_backlog(ConnectionLayer *cl) { return 0; } static void ssh1_throttle_all_channels(ConnectionLayer *cl, bool throttled) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); struct ssh1_channel *c; int i; for (i = 0; NULL != (c = index234(s->channels, i)); i++) chan_set_input_wanted(c->chan, !throttled); } static bool ssh1_ldisc_option(ConnectionLayer *cl, int option) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); return s->ldisc_opts[option]; } static void ssh1_set_ldisc_option(ConnectionLayer *cl, int option, bool value) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); s->ldisc_opts[option] = value; } static void ssh1_enable_x_fwd(ConnectionLayer *cl) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); s->X11_fwd_enabled = true; } static void ssh1_enable_agent_fwd(ConnectionLayer *cl) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); s->agent_fwd_enabled = true; } static void ssh1_set_wants_user_input(ConnectionLayer *cl, bool wanted) { struct ssh1_connection_state *s = container_of(cl, struct ssh1_connection_state, cl); s->want_user_input = wanted; s->finished_setup = true; } static bool ssh1_connection_want_user_input(PacketProtocolLayer *ppl) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); return s->want_user_input; } static void ssh1_connection_got_user_input(PacketProtocolLayer *ppl) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); while (s->mainchan && bufchain_size(s->ppl.user_input) > 0) { /* * Add user input to the main channel's buffer. */ ptrlen data = bufchain_prefix(s->ppl.user_input); if (data.len > 512) data.len = 512; sshfwd_write(&s->mainchan_sc, data.ptr, data.len); bufchain_consume(s->ppl.user_input, data.len); } } static void ssh1_connection_reconfigure(PacketProtocolLayer *ppl, Conf *conf) { struct ssh1_connection_state *s = container_of(ppl, struct ssh1_connection_state, ppl); conf_free(s->conf); s->conf = conf_copy(conf); if (s->portfwdmgr_configured) portfwdmgr_config(s->portfwdmgr, s->conf); }