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Diffstat (limited to 'src/AllCommands.cxx')
| -rw-r--r-- | src/AllCommands.cxx | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/src/AllCommands.cxx b/src/AllCommands.cxx new file mode 100644 index 000000000..28e3d3ebd --- /dev/null +++ b/src/AllCommands.cxx @@ -0,0 +1,391 @@ +/* + * Copyright (C) 2003-2012 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" + +extern "C" { +#include "AllCommands.h" +} + +#include "command.h" +#include "QueueCommands.hxx" +#include "PlayerCommands.hxx" +#include "PlaylistCommands.hxx" +#include "DatabaseCommands.hxx" +#include "OutputCommands.hxx" +#include "StickerCommands.hxx" +#include "MessageCommands.hxx" +#include "OtherCommands.hxx" +#include "permission.h" +#include "tag.h" + +extern "C" { +#include "protocol/result.h" +#include "tokenizer.h" +#include "client.h" + +#ifdef ENABLE_SQLITE +#include "sticker.h" +#endif +} + +#include <assert.h> +#include <string.h> + +/* + * The most we ever use is for search/find, and that limits it to the + * number of tags we can have. Add one for the command, and one extra + * to catch errors clients may send us + */ +#define COMMAND_ARGV_MAX (2+(TAG_NUM_OF_ITEM_TYPES*2)) + +/* if min: -1 don't check args * + * if max: -1 no max args */ +struct command { + const char *cmd; + unsigned permission; + int min; + int max; + enum command_return (*handler)(struct client *client, int argc, char **argv); +}; + +/* don't be fooled, this is the command handler for "commands" command */ +static enum command_return +handle_commands(struct client *client, + G_GNUC_UNUSED int argc, G_GNUC_UNUSED char *argv[]); + +static enum command_return +handle_not_commands(struct client *client, + G_GNUC_UNUSED int argc, G_GNUC_UNUSED char *argv[]); + +/** + * The command registry. + * + * This array must be sorted! + */ +static const struct command commands[] = { + { "add", PERMISSION_ADD, 1, 1, handle_add }, + { "addid", PERMISSION_ADD, 1, 2, handle_addid }, + { "channels", PERMISSION_READ, 0, 0, handle_channels }, + { "clear", PERMISSION_CONTROL, 0, 0, handle_clear }, + { "clearerror", PERMISSION_CONTROL, 0, 0, handle_clearerror }, + { "close", PERMISSION_NONE, -1, -1, handle_close }, + { "commands", PERMISSION_NONE, 0, 0, handle_commands }, + { "config", PERMISSION_ADMIN, 0, 0, handle_config }, + { "consume", PERMISSION_CONTROL, 1, 1, handle_consume }, + { "count", PERMISSION_READ, 2, -1, handle_count }, + { "crossfade", PERMISSION_CONTROL, 1, 1, handle_crossfade }, + { "currentsong", PERMISSION_READ, 0, 0, handle_currentsong }, + { "decoders", PERMISSION_READ, 0, 0, handle_decoders }, + { "delete", PERMISSION_CONTROL, 1, 1, handle_delete }, + { "deleteid", PERMISSION_CONTROL, 1, 1, handle_deleteid }, + { "disableoutput", PERMISSION_ADMIN, 1, 1, handle_disableoutput }, + { "enableoutput", PERMISSION_ADMIN, 1, 1, handle_enableoutput }, + { "find", PERMISSION_READ, 2, -1, handle_find }, + { "findadd", PERMISSION_READ, 2, -1, handle_findadd}, + { "idle", PERMISSION_READ, 0, -1, handle_idle }, + { "kill", PERMISSION_ADMIN, -1, -1, handle_kill }, + { "list", PERMISSION_READ, 1, -1, handle_list }, + { "listall", PERMISSION_READ, 0, 1, handle_listall }, + { "listallinfo", PERMISSION_READ, 0, 1, handle_listallinfo }, + { "listplaylist", PERMISSION_READ, 1, 1, handle_listplaylist }, + { "listplaylistinfo", PERMISSION_READ, 1, 1, handle_listplaylistinfo }, + { "listplaylists", PERMISSION_READ, 0, 0, handle_listplaylists }, + { "load", PERMISSION_ADD, 1, 2, handle_load }, + { "lsinfo", PERMISSION_READ, 0, 1, handle_lsinfo }, + { "mixrampdb", PERMISSION_CONTROL, 1, 1, handle_mixrampdb }, + { "mixrampdelay", PERMISSION_CONTROL, 1, 1, handle_mixrampdelay }, + { "move", PERMISSION_CONTROL, 2, 2, handle_move }, + { "moveid", PERMISSION_CONTROL, 2, 2, handle_moveid }, + { "next", PERMISSION_CONTROL, 0, 0, handle_next }, + { "notcommands", PERMISSION_NONE, 0, 0, handle_not_commands }, + { "outputs", PERMISSION_READ, 0, 0, handle_devices }, + { "password", PERMISSION_NONE, 1, 1, handle_password }, + { "pause", PERMISSION_CONTROL, 0, 1, handle_pause }, + { "ping", PERMISSION_NONE, 0, 0, handle_ping }, + { "play", PERMISSION_CONTROL, 0, 1, handle_play }, + { "playid", PERMISSION_CONTROL, 0, 1, handle_playid }, + { "playlist", PERMISSION_READ, 0, 0, handle_playlist }, + { "playlistadd", PERMISSION_CONTROL, 2, 2, handle_playlistadd }, + { "playlistclear", PERMISSION_CONTROL, 1, 1, handle_playlistclear }, + { "playlistdelete", PERMISSION_CONTROL, 2, 2, handle_playlistdelete }, + { "playlistfind", PERMISSION_READ, 2, -1, handle_playlistfind }, + { "playlistid", PERMISSION_READ, 0, 1, handle_playlistid }, + { "playlistinfo", PERMISSION_READ, 0, 1, handle_playlistinfo }, + { "playlistmove", PERMISSION_CONTROL, 3, 3, handle_playlistmove }, + { "playlistsearch", PERMISSION_READ, 2, -1, handle_playlistsearch }, + { "plchanges", PERMISSION_READ, 1, 1, handle_plchanges }, + { "plchangesposid", PERMISSION_READ, 1, 1, handle_plchangesposid }, + { "previous", PERMISSION_CONTROL, 0, 0, handle_previous }, + { "prio", PERMISSION_CONTROL, 2, -1, handle_prio }, + { "prioid", PERMISSION_CONTROL, 2, -1, handle_prioid }, + { "random", PERMISSION_CONTROL, 1, 1, handle_random }, + { "readmessages", PERMISSION_READ, 0, 0, handle_read_messages }, + { "rename", PERMISSION_CONTROL, 2, 2, handle_rename }, + { "repeat", PERMISSION_CONTROL, 1, 1, handle_repeat }, + { "replay_gain_mode", PERMISSION_CONTROL, 1, 1, + handle_replay_gain_mode }, + { "replay_gain_status", PERMISSION_READ, 0, 0, + handle_replay_gain_status }, + { "rescan", PERMISSION_CONTROL, 0, 1, handle_rescan }, + { "rm", PERMISSION_CONTROL, 1, 1, handle_rm }, + { "save", PERMISSION_CONTROL, 1, 1, handle_save }, + { "search", PERMISSION_READ, 2, -1, handle_search }, + { "searchadd", PERMISSION_ADD, 2, -1, handle_searchadd }, + { "searchaddpl", PERMISSION_CONTROL, 3, -1, handle_searchaddpl }, + { "seek", PERMISSION_CONTROL, 2, 2, handle_seek }, + { "seekcur", PERMISSION_CONTROL, 1, 1, handle_seekcur }, + { "seekid", PERMISSION_CONTROL, 2, 2, handle_seekid }, + { "sendmessage", PERMISSION_CONTROL, 2, 2, handle_send_message }, + { "setvol", PERMISSION_CONTROL, 1, 1, handle_setvol }, + { "shuffle", PERMISSION_CONTROL, 0, 1, handle_shuffle }, + { "single", PERMISSION_CONTROL, 1, 1, handle_single }, + { "stats", PERMISSION_READ, 0, 0, handle_stats }, + { "status", PERMISSION_READ, 0, 0, handle_status }, +#ifdef ENABLE_SQLITE + { "sticker", PERMISSION_ADMIN, 3, -1, handle_sticker }, +#endif + { "stop", PERMISSION_CONTROL, 0, 0, handle_stop }, + { "subscribe", PERMISSION_READ, 1, 1, handle_subscribe }, + { "swap", PERMISSION_CONTROL, 2, 2, handle_swap }, + { "swapid", PERMISSION_CONTROL, 2, 2, handle_swapid }, + { "tagtypes", PERMISSION_READ, 0, 0, handle_tagtypes }, + { "unsubscribe", PERMISSION_READ, 1, 1, handle_unsubscribe }, + { "update", PERMISSION_CONTROL, 0, 1, handle_update }, + { "urlhandlers", PERMISSION_READ, 0, 0, handle_urlhandlers }, +}; + +static const unsigned num_commands = sizeof(commands) / sizeof(commands[0]); + +static bool +command_available(G_GNUC_UNUSED const struct command *cmd) +{ +#ifdef ENABLE_SQLITE + if (strcmp(cmd->cmd, "sticker") == 0) + return sticker_enabled(); +#endif + + return true; +} + +/* don't be fooled, this is the command handler for "commands" command */ +static enum command_return +handle_commands(struct client *client, + G_GNUC_UNUSED int argc, G_GNUC_UNUSED char *argv[]) +{ + const unsigned permission = client_get_permission(client); + const struct command *cmd; + + for (unsigned i = 0; i < num_commands; ++i) { + cmd = &commands[i]; + + if (cmd->permission == (permission & cmd->permission) && + command_available(cmd)) + client_printf(client, "command: %s\n", cmd->cmd); + } + + return COMMAND_RETURN_OK; +} + +static enum command_return +handle_not_commands(struct client *client, + G_GNUC_UNUSED int argc, G_GNUC_UNUSED char *argv[]) +{ + const unsigned permission = client_get_permission(client); + const struct command *cmd; + + for (unsigned i = 0; i < num_commands; ++i) { + cmd = &commands[i]; + + if (cmd->permission != (permission & cmd->permission)) + client_printf(client, "command: %s\n", cmd->cmd); + } + + return COMMAND_RETURN_OK; +} + +void command_init(void) +{ +#ifndef NDEBUG + /* ensure that the command list is sorted */ + for (unsigned i = 0; i < num_commands - 1; ++i) + assert(strcmp(commands[i].cmd, commands[i + 1].cmd) < 0); +#endif +} + +void command_finish(void) +{ +} + +static const struct command * +command_lookup(const char *name) +{ + unsigned a = 0, b = num_commands, i; + int cmp; + + /* binary search */ + do { + i = (a + b) / 2; + + cmp = strcmp(name, commands[i].cmd); + if (cmp == 0) + return &commands[i]; + else if (cmp < 0) + b = i; + else if (cmp > 0) + a = i + 1; + } while (a < b); + + return NULL; +} + +static bool +command_check_request(const struct command *cmd, struct client *client, + unsigned permission, int argc, char *argv[]) +{ + int min = cmd->min + 1; + int max = cmd->max + 1; + + if (cmd->permission != (permission & cmd->permission)) { + if (client != NULL) + command_error(client, ACK_ERROR_PERMISSION, + "you don't have permission for \"%s\"", + cmd->cmd); + return false; + } + + if (min == 0) + return true; + + if (min == max && max != argc) { + if (client != NULL) + command_error(client, ACK_ERROR_ARG, + "wrong number of arguments for \"%s\"", + argv[0]); + return false; + } else if (argc < min) { + if (client != NULL) + command_error(client, ACK_ERROR_ARG, + "too few arguments for \"%s\"", argv[0]); + return false; + } else if (argc > max && max /* != 0 */ ) { + if (client != NULL) + command_error(client, ACK_ERROR_ARG, + "too many arguments for \"%s\"", argv[0]); + return false; + } else + return true; +} + +static const struct command * +command_checked_lookup(struct client *client, unsigned permission, + int argc, char *argv[]) +{ + const struct command *cmd; + + current_command = ""; + + if (argc == 0) + return NULL; + + cmd = command_lookup(argv[0]); + if (cmd == NULL) { + if (client != NULL) + command_error(client, ACK_ERROR_UNKNOWN, + "unknown command \"%s\"", argv[0]); + return NULL; + } + + current_command = cmd->cmd; + + if (!command_check_request(cmd, client, permission, argc, argv)) + return NULL; + + return cmd; +} + +enum command_return +command_process(struct client *client, unsigned num, char *line) +{ + GError *error = NULL; + int argc; + char *argv[COMMAND_ARGV_MAX] = { NULL }; + const struct command *cmd; + enum command_return ret = COMMAND_RETURN_ERROR; + + command_list_num = num; + + /* get the command name (first word on the line) */ + + argv[0] = tokenizer_next_word(&line, &error); + if (argv[0] == NULL) { + current_command = ""; + if (*line == 0) + command_error(client, ACK_ERROR_UNKNOWN, + "No command given"); + else { + command_error(client, ACK_ERROR_UNKNOWN, + "%s", error->message); + g_error_free(error); + } + current_command = NULL; + + return COMMAND_RETURN_ERROR; + } + + argc = 1; + + /* now parse the arguments (quoted or unquoted) */ + + while (argc < (int)G_N_ELEMENTS(argv) && + (argv[argc] = + tokenizer_next_param(&line, &error)) != NULL) + ++argc; + + /* some error checks; we have to set current_command because + command_error() expects it to be set */ + + current_command = argv[0]; + + if (argc >= (int)G_N_ELEMENTS(argv)) { + command_error(client, ACK_ERROR_ARG, "Too many arguments"); + current_command = NULL; + return COMMAND_RETURN_ERROR; + } + + if (*line != 0) { + command_error(client, ACK_ERROR_ARG, + "%s", error->message); + current_command = NULL; + g_error_free(error); + return COMMAND_RETURN_ERROR; + } + + /* look up and invoke the command handler */ + + cmd = command_checked_lookup(client, client_get_permission(client), + argc, argv); + if (cmd) + ret = cmd->handler(client, argc, argv); + + current_command = NULL; + command_list_num = 0; + + return ret; +} |