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227 lines
5.1 KiB
C
227 lines
5.1 KiB
C
/* $Id: server-msg.c,v 1.28 2007-10-23 09:36:19 nicm Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "tmux.h"
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int server_msg_fn_command(struct hdr *, struct client *);
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int server_msg_fn_identify(struct hdr *, struct client *);
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int server_msg_fn_keys(struct hdr *, struct client *);
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int server_msg_fn_resize(struct hdr *, struct client *);
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void server_msg_fn_command_error(struct cmd_ctx *, const char *, ...);
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void server_msg_fn_command_print(struct cmd_ctx *, const char *, ...);
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struct server_msg {
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enum hdrtype type;
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int (*fn)(struct hdr *, struct client *);
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};
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const struct server_msg server_msg_table[] = {
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{ MSG_IDENTIFY, server_msg_fn_identify },
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{ MSG_COMMAND, server_msg_fn_command },
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{ MSG_RESIZE, server_msg_fn_resize },
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{ MSG_KEYS, server_msg_fn_keys },
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};
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#define NSERVERMSG (sizeof server_msg_table / sizeof server_msg_table[0])
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int
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server_msg_dispatch(struct client *c)
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{
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struct hdr hdr;
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const struct server_msg *msg;
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u_int i;
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int n;
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for (;;) {
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if (BUFFER_USED(c->in) < sizeof hdr)
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return (0);
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memcpy(&hdr, BUFFER_OUT(c->in), sizeof hdr);
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if (BUFFER_USED(c->in) < (sizeof hdr) + hdr.size)
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return (0);
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buffer_remove(c->in, sizeof hdr);
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for (i = 0; i < NSERVERMSG; i++) {
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msg = server_msg_table + i;
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if (msg->type == hdr.type) {
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if ((n = msg->fn(&hdr, c)) != 0)
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return (n);
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break;
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}
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}
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if (i == NSERVERMSG)
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fatalx("unexpected message");
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}
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}
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void
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server_msg_fn_command_error(struct cmd_ctx *ctx, const char *fmt, ...)
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{
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va_list ap;
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char *msg;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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va_end(ap);
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server_write_client(ctx->client, MSG_ERROR, msg, strlen(msg));
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xfree(msg);
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}
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void
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server_msg_fn_command_print(struct cmd_ctx *ctx, const char *fmt, ...)
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{
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va_list ap;
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char *msg;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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va_end(ap);
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server_write_client(ctx->client, MSG_PRINT, msg, strlen(msg));
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xfree(msg);
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}
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int
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server_msg_fn_command(struct hdr *hdr, struct client *c)
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{
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struct msg_command_data data;
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struct cmd_ctx ctx;
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struct cmd *cmd;
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char *cause;
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if (hdr->size < sizeof data)
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fatalx("bad MSG_COMMAND size");
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buffer_read(c->in, &data, sizeof data);
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cmd = cmd_recv(c->in);
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log_debug("got command %s from client %d", cmd->entry->name, c->fd);
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ctx.error = server_msg_fn_command_error;
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ctx.print = server_msg_fn_command_print;
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ctx.client = c;
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ctx.flags = 0;
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if (data.sid.pid != -1 && (cmd->entry->flags & CMD_CANTNEST)) {
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server_msg_fn_command_error(&ctx, "sessions should be nested "
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"with care. unset $TMUX to force");
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return (0);
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}
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if (cmd->entry->flags & CMD_NOSESSION)
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ctx.session = NULL;
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else {
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ctx.session = server_find_sessid(&data.sid, &cause);
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if (ctx.session == NULL) {
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server_msg_fn_command_error(&ctx, "%s", cause);
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xfree(cause);
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return (0);
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}
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}
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cmd_exec(cmd, &ctx);
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cmd_free(cmd);
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return (0);
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}
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int
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server_msg_fn_identify(struct hdr *hdr, struct client *c)
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{
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struct msg_identify_data data;
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if (hdr->size < sizeof data)
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fatalx("bad MSG_IDENTIFY size");
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buffer_read(c->in, &data, sizeof data);
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log_debug("identify msg from client: %u,%u", data.sx, data.sy);
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c->sx = data.sx;
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c->sy = data.sy;
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data.tty[(sizeof data.tty) - 1] = '\0';
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c->tty = xstrdup(data.tty);
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c->flags |= CLIENT_TERMINAL;
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return (0);
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}
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int
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server_msg_fn_resize(struct hdr *hdr, struct client *c)
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{
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struct msg_resize_data data;
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if (hdr->size != sizeof data)
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fatalx("bad MSG_RESIZE size");
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buffer_read(c->in, &data, sizeof data);
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log_debug("resize msg from client: %u,%u", data.sx, data.sy);
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c->sx = data.sx;
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if (c->sx == 0)
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c->sx = 80;
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c->sy = data.sy;
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if (c->sy == 0)
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c->sy = 25;
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recalculate_sizes();
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return (0);
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}
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int
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server_msg_fn_keys(struct hdr *hdr, struct client *c)
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{
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int key;
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size_t size;
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if (hdr->size & 0x1)
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fatalx("bad MSG_KEYS size");
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if (c->flags & CLIENT_HOLD) {
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server_redraw_client(c);
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c->flags &= ~CLIENT_HOLD;
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}
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size = hdr->size;
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while (size != 0) {
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key = (int16_t) input_extract16(c->in);
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size -= 2;
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if (c->flags & CLIENT_PREFIX) {
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key_bindings_dispatch(key, c);
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c->flags &= ~CLIENT_PREFIX;
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continue;
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}
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if (key == prefix_key)
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c->flags |= CLIENT_PREFIX;
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else
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window_key(c->session->window, key);
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}
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return (0);
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}
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