tmate-io_tmate-ssh-server/tmate-daemon-decoder.c
2016-03-28 02:18:17 -04:00

525 lines
12 KiB
C

#include <ctype.h>
#include <unistd.h>
#include "tmate.h"
#include "tmate-protocol.h"
#include "window-copy.h"
char *tmate_left_status, *tmate_right_status;
static void tmate_header(struct tmate_session *session,
struct tmate_unpacker *uk)
{
char port_arg[16] = {0};
char tmp[512];
session->client_protocol_version = unpack_int(uk);
if (session->client_protocol_version <= 4) {
session->daemon_encoder.mpac_version = 4;
}
if (session->client_protocol_version >= 3) {
session->client_version = unpack_string(uk);
} else {
session->client_version = xstrdup("1.8.5");
}
tmate_notice("Daemon header: client version: %s, protocol version: %d",
session->client_version, session->client_protocol_version);
if (tmate_has_proxy()) {
/* If we have a proxy, it takes care of all the following notificatons */
tmate_send_proxy_header(session);
return;
}
if (tmate_settings->ssh_port != 22)
sprintf(port_arg, " -p%d", tmate_settings->ssh_port);
sprintf(tmp, "ssh%s %s@%s", port_arg, session->session_token_ro, tmate_settings->tmate_host);
tmate_notify("Note: clear your terminal before sharing readonly access");
tmate_notify("ssh session read only: %s", tmp);
sprintf(tmp, "ssh%s %s@%s", port_arg, session->session_token, tmate_settings->tmate_host);
tmate_notify("ssh session: %s", tmp);
tmate_set_env("tmate_ssh_ro", tmp);
tmate_set_env("tmate_ssh", tmp);
tmate_send_client_ready();
}
static void tmate_ready(__unused struct tmate_session *session,
__unused struct tmate_unpacker *uk)
{
/* used by the proxy */
}
extern u_int next_window_pane_id;
static void tmate_sync_window_panes(struct window *w,
struct tmate_unpacker *w_uk)
{
struct tmate_unpacker uk, tmp_uk;
struct window_pane *wp, *wp_tmp;
int active_pane_id;
TAILQ_FOREACH(wp, &w->panes, entry)
wp->flags |= PANE_KILL;
unpack_each(&uk, &tmp_uk, w_uk) {
int id = unpack_int(&uk);
u_int sx = unpack_int(&uk);
u_int sy = unpack_int(&uk);
u_int xoff = unpack_int(&uk);
u_int yoff = unpack_int(&uk);
wp = window_pane_find_by_id(id);
if (wp && wp->window != w) {
/* Pane in the wrong window */
tmate_fatal("Pane id=%u in the wrong window", id);
}
if (!wp) {
next_window_pane_id = id;
wp = window_add_pane(w, TMATE_HLIMIT);
window_set_active_pane(w, wp);
}
wp->flags &= ~PANE_KILL;
if (wp->xoff != xoff || wp->yoff != yoff ||
wp->sx != sx || wp->sx != sy) {
wp->xoff = xoff;
wp->yoff = yoff;
window_pane_resize(wp, sx, sy);
wp->flags |= PANE_REDRAW;
}
}
TAILQ_FOREACH_SAFE(wp, &w->panes, entry, wp_tmp) {
if (wp->flags & PANE_KILL)
window_remove_pane(w, wp);
}
active_pane_id = unpack_int(w_uk);
wp = window_pane_find_by_id(active_pane_id);
window_set_active_pane(w, wp);
}
static void tmate_sync_windows(struct session *s,
struct tmate_unpacker *s_uk)
{
struct tmate_unpacker uk, tmp_uk;
struct winlink *wl, *wl_tmp;
struct window *w;
int active_window_idx;
char *cause;
RB_FOREACH(wl, winlinks, &s->windows)
wl->flags |= WINLINK_KILL;
unpack_each(&uk, &tmp_uk, s_uk) {
int idx = unpack_int(&uk);
char *name = unpack_string(&uk);
wl = winlink_find_by_index(&s->windows, idx);
if (!wl) {
wl = session_new(s, name, 0, NULL, NULL, NULL, idx, &cause);
if (!wl)
tmate_fatal("can't create window idx=%d", idx);
}
wl->flags &= ~WINLINK_KILL;
w = wl->window;
free(w->name);
w->name = name;
w->sx = s->sx;
w->sy = s->sy;
tmate_sync_window_panes(w, &uk);
}
RB_FOREACH_SAFE(wl, winlinks, &s->windows, wl_tmp) {
if (wl->flags & WINLINK_KILL)
session_detach(s, wl);
}
active_window_idx = unpack_int(s_uk);
wl = winlink_find_by_index(&s->windows, active_window_idx);
if (!wl)
tmate_fatal("no valid active window");
session_set_current(s, wl);
server_redraw_window(wl->window);
}
static void tmate_sync_layout(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct session *s;
char *cause;
int sx = unpack_int(uk);
int sy = unpack_int(uk);
s = RB_MIN(sessions, &sessions);
if (!s) {
s = session_create("default", -1, NULL, "/", "/",
NULL, NULL, 0, sx, sy, &cause);
if (!s)
tmate_fatal("can't create main session");
}
s->sx = sx;
s->sy = sy;
tmate_sync_windows(s, uk);
}
static void tmate_pty_data(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct window_pane *wp;
const char *buf;
size_t len;
int id;
id = unpack_int(uk);
unpack_buffer(uk, &buf, &len);
wp = window_pane_find_by_id(id);
if (!wp)
tmate_fatal("can't find pane id=%d (pty_data)", id);
evbuffer_add(wp->event_input, buf, len);
input_parse(wp);
wp->window->flags |= WINDOW_SILENCE;
}
static void tmate_exec_cmd_str(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct cmd_q *cmd_q;
struct cmd_list *cmdlist;
char *cmd_str;
char *cause;
cmd_str = unpack_string(uk);
tmate_info("Local cmd: %s", cmd_str);
if (cmd_string_parse(cmd_str, &cmdlist, NULL, 0, &cause) != 0) {
tmate_info("parse error: %s", cause);
free(cause);
goto out;
}
cmd_q = cmdq_new(NULL);
cmdq_run(cmd_q, cmdlist, NULL);
cmd_list_free(cmdlist);
cmdq_free(cmd_q);
out:
free(cmd_str);
}
static void tmate_exec_cmd(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct cmd_q *cmd_q;
struct cmd_list *cmdlist;
struct cmd *cmd;
char *cmd_str;
char *cause;
int i;
int argc;
char **argv;
argc = uk->argc;
argv = xmalloc(sizeof(char *) * argc);
for (i = 0; i < argc; i++)
argv[i] = unpack_string(uk);
cmd = cmd_parse(argc, argv, NULL, 0, &cause);
if (!cmd) {
tmate_info("parse error: %s", cause);
free(cause);
goto out;
}
cmd_str = cmd_print(cmd);
tmate_info("Local cmd: %s", cmd_str);
free(cmd_str);
cmdlist = xcalloc(1, sizeof *cmdlist);
cmdlist->references = 1;
TAILQ_INIT(&cmdlist->list);
TAILQ_INSERT_TAIL(&cmdlist->list, cmd, qentry);
cmd_q = cmdq_new(NULL);
cmdq_run(cmd_q, cmdlist, NULL);
cmd_list_free(cmdlist);
cmdq_free(cmd_q);
out:
cmd_free_argv(argc, argv);
}
static void tmate_failed_cmd(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct client *c;
int client_id;
char *cause;
client_id = unpack_int(uk);
cause = unpack_string(uk);
TAILQ_FOREACH(c, &clients, entry) {
if (c && c->id == client_id) {
*cause = toupper((u_char) *cause);
status_message_set(c, "%s", cause);
break;
}
}
free(cause);
}
static void tmate_status(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct client *c;
free(tmate_left_status);
free(tmate_right_status);
tmate_left_status = unpack_string(uk);
tmate_right_status = unpack_string(uk);
TAILQ_FOREACH(c, &clients, entry)
c->flags |= CLIENT_STATUS;
}
static void tmate_sync_copy_mode(struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct tmate_unpacker cm_uk, sel_uk, input_uk;
struct window_copy_mode_data *data;
struct window_pane *wp;
int pane_id;
int base_backing = 1;
pane_id = unpack_int(uk);
wp = window_pane_find_by_id(pane_id);
if (!wp)
tmate_fatal("can't find window pane=%d", pane_id);
unpack_array(uk, &cm_uk);
if (cm_uk.argc == 0) {
if (wp->mode) {
data = wp->modedata;
free((char *)data->inputprompt);
window_pane_reset_mode(wp);
}
return;
}
if (session->client_protocol_version >= 2)
base_backing = unpack_int(&cm_uk);
if (window_pane_set_mode(wp, &window_copy_mode) == 0) {
if (base_backing)
window_copy_init_from_pane(wp, 0);
else
window_copy_init_for_output(wp);
}
data = wp->modedata;
data->oy = unpack_int(&cm_uk);
data->cx = unpack_int(&cm_uk);
data->cy = unpack_int(&cm_uk);
unpack_array(&cm_uk, &sel_uk);
if (sel_uk.argc) {
data->screen.sel.flag = 1;
data->selx = unpack_int(&sel_uk);
if (session->client_protocol_version >= 2) {
data->sely = -unpack_int(&sel_uk) + screen_hsize(data->backing)
+ screen_size_y(data->backing)
- 1;
} else
data->sely = unpack_int(&sel_uk);
data->rectflag = unpack_int(&sel_uk);
} else
data->screen.sel.flag = 0;
unpack_array(&cm_uk, &input_uk);
if (input_uk.argc) {
/*
* XXX In the original tmux code, inputprompt is not a
* malloced string, the two piece of code must not run at the
* same time, otherwise, we'll either get a memory leak, or a
* crash.
*/
data->inputtype = unpack_int(&input_uk);
free((char *)data->inputprompt);
data->inputprompt = unpack_string(&input_uk);
free(data->inputstr);
data->inputstr = unpack_string(&input_uk);
} else {
data->inputtype = WINDOW_COPY_OFF;
free((char *)data->inputprompt);
data->inputprompt = NULL;
}
window_copy_update_selection(wp, 1);
window_copy_redraw_screen(wp);
}
static void tmate_write_copy_mode(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct window_pane *wp;
int id;
char *str;
id = unpack_int(uk);
wp = window_pane_find_by_id(id);
if (!wp)
tmate_fatal("can't find pane id=%d (copy_mode)", id);
str = unpack_string(uk);
if (window_pane_set_mode(wp, &window_copy_mode) == 0)
window_copy_init_for_output(wp);
window_copy_add(wp, "%s", str);
free(str);
}
static void tmate_fin(__unused struct tmate_session *session,
__unused struct tmate_unpacker *uk)
{
request_server_termination();
}
static void tmate_reconnect(__unused struct tmate_session *session,
__unused struct tmate_unpacker *uk)
{
if (!tmate_has_proxy())
tmate_fatal("Cannot do reconnections without the proxy");
}
static void restore_snapshot_grid(struct grid *grid, struct tmate_unpacker *uk)
{
struct grid_cell gc;
char *line_str;
struct utf8_data *utf8_data;
unsigned int i, line_i;
unsigned int packed_flags;
struct tmate_unpacker lines_uk, line_uk, line_flags_uk;
unpack_array(uk, &lines_uk);
for (line_i = 0; lines_uk.argc > 0; line_i++) {
while (line_i >= grid->hsize + grid->sy)
grid_scroll_history(grid);
unpack_array(&lines_uk, &line_uk);
line_str = unpack_string(&line_uk);
utf8_data = utf8_fromcstr(line_str);
free(line_str);
unpack_array(&line_uk, &line_flags_uk);
for (i = 0; line_flags_uk.argc > 0; i++) {
utf8_copy(&gc.data, &utf8_data[i]);
packed_flags = unpack_int(&line_flags_uk);
gc.flags = (packed_flags >> 24) & 0xFF;
gc.attr = (packed_flags >> 16) & 0xFF;
gc.bg = (packed_flags >> 8) & 0xFF;
gc.fg = packed_flags & 0xFF;
grid_set_cell(grid, i, line_i, &gc);
}
}
}
static void restore_snapshot_pane(struct tmate_unpacker *uk)
{
int id;
struct window_pane *wp;
struct tmate_unpacker grid_uk;
struct screen *screen;
id = unpack_int(uk);
wp = window_pane_find_by_id(id);
if (!wp)
tmate_fatal("can't find pane id=%d (snapshot restore)", id);
screen = &wp->base;
screen_reinit(screen);
wp->flags |= PANE_REDRAW;
screen->mode = unpack_int(uk);
unpack_array(uk, &grid_uk);
screen->cx = unpack_int(&grid_uk);
screen->cy = unpack_int(&grid_uk);
grid_clear_history(screen->grid);
restore_snapshot_grid(screen->grid, &grid_uk);
if (wp->saved_grid != NULL) {
grid_destroy(wp->saved_grid);
wp->saved_grid = NULL;
}
if (unpack_peek_type(uk) == MSGPACK_OBJECT_NIL)
return;
unpack_array(uk, &grid_uk);
wp->saved_cx = unpack_int(&grid_uk);
wp->saved_cy = unpack_int(&grid_uk);
wp->saved_grid = grid_create(screen->grid->sx, screen->grid->sy, 0);
restore_snapshot_grid(wp->saved_grid, &grid_uk);
}
static void tmate_snapshot(__unused struct tmate_session *session,
struct tmate_unpacker *uk)
{
struct tmate_unpacker panes_uk, pane_uk;
unpack_array(uk, &panes_uk);
while (panes_uk.argc > 0) {
unpack_array(&panes_uk, &pane_uk);
restore_snapshot_pane(&pane_uk);
}
}
void tmate_dispatch_daemon_message(struct tmate_session *session,
struct tmate_unpacker *uk)
{
int cmd = unpack_int(uk);
switch (cmd) {
#define dispatch(c, f) case c: f(session, uk); break
dispatch(TMATE_OUT_HEADER, tmate_header);
dispatch(TMATE_OUT_SYNC_LAYOUT, tmate_sync_layout);
dispatch(TMATE_OUT_PTY_DATA, tmate_pty_data);
dispatch(TMATE_OUT_EXEC_CMD_STR, tmate_exec_cmd_str);
dispatch(TMATE_OUT_FAILED_CMD, tmate_failed_cmd);
dispatch(TMATE_OUT_STATUS, tmate_status);
dispatch(TMATE_OUT_SYNC_COPY_MODE, tmate_sync_copy_mode);
dispatch(TMATE_OUT_WRITE_COPY_MODE, tmate_write_copy_mode);
dispatch(TMATE_OUT_FIN, tmate_fin);
dispatch(TMATE_OUT_READY, tmate_ready);
dispatch(TMATE_OUT_RECONNECT, tmate_reconnect);
dispatch(TMATE_OUT_SNAPSHOT, tmate_snapshot);
dispatch(TMATE_OUT_EXEC_CMD, tmate_exec_cmd);
default: tmate_fatal("Bad message type: %d", cmd);
}
}