| /*! \file control_cmd.c |
| * SNMP-like status interface. */ |
| /* |
| * (C) 2010-2011 by Daniel Willmann <daniel@totalueberwachung.de> |
| * (C) 2010-2011 by On-Waves |
| * (C) 2014 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2017 by sysmocom - s.f.m.c. GmbH |
| * |
| * All Rights Reserved |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * 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. |
| * |
| */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <osmocom/ctrl/control_cmd.h> |
| #include <osmocom/ctrl/control_if.h> |
| |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/vty/command.h> |
| #include <osmocom/vty/vector.h> |
| |
| extern vector ctrl_node_vec; |
| |
| const struct value_string ctrl_type_vals[] = { |
| { CTRL_TYPE_UNKNOWN, "(unknown)" }, |
| { CTRL_TYPE_GET, "GET" }, |
| { CTRL_TYPE_SET, "SET" }, |
| { CTRL_TYPE_GET_REPLY, "GET_REPLY" }, |
| { CTRL_TYPE_SET_REPLY, "SET_REPLY" }, |
| { CTRL_TYPE_TRAP, "TRAP" }, |
| { CTRL_TYPE_ERROR, "ERROR" }, |
| { 0, NULL } |
| }; |
| |
| /* Functions from libosmocom */ |
| extern vector cmd_make_descvec(const char *string, const char *descstr); |
| |
| /* Get the ctrl_cmd_element that matches this command */ |
| static struct ctrl_cmd_element *ctrl_cmd_get_element_match(vector vline, vector node) |
| { |
| int index, j; |
| const char *desc; |
| struct ctrl_cmd_element *cmd_el; |
| struct ctrl_cmd_struct *cmd_desc; |
| char *str; |
| |
| for (index = 0; index < vector_active(node); index++) { |
| if ((cmd_el = vector_slot(node, index))) { |
| cmd_desc = &cmd_el->strcmd; |
| if (cmd_desc->nr_commands > vector_active(vline)) |
| continue; |
| for (j =0; j < vector_active(vline) && j < cmd_desc->nr_commands; j++) { |
| str = vector_slot(vline, j); |
| desc = cmd_desc->command[j]; |
| if (desc[0] == '*') |
| return cmd_el; /* Partial match */ |
| if (strcmp(desc, str) != 0) |
| break; |
| } |
| /* We went through all the elements and all matched */ |
| if (j == cmd_desc->nr_commands) |
| return cmd_el; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /*! Execute a given received command |
| * \param[in] vline vector representing the available/registered commands |
| * \param[inout] command parsed received command to be executed |
| * \param[in] node CTRL interface node |
| * \param[in] data opaque data passed to verify(), get() and set() call-backs |
| * \returns CTRL_CMD_HANDLED or CTRL_CMD_REPLY; CTRL_CMD_ERROR on error */ |
| int ctrl_cmd_exec(vector vline, struct ctrl_cmd *command, vector node, void *data) |
| { |
| int ret = CTRL_CMD_ERROR; |
| struct ctrl_cmd_element *cmd_el; |
| |
| if ((command->type != CTRL_TYPE_GET) && (command->type != CTRL_TYPE_SET)) { |
| command->reply = "Trying to execute something not GET or SET"; |
| goto out; |
| } |
| if ((command->type == CTRL_TYPE_SET) && (!command->value)) { |
| command->reply = "SET without a value"; |
| goto out; |
| } |
| |
| if (!vline) |
| goto out; |
| |
| cmd_el = ctrl_cmd_get_element_match(vline, node); |
| |
| if (!cmd_el) { |
| command->reply = "Command not found"; |
| goto out; |
| } |
| |
| if (command->type == CTRL_TYPE_SET) { |
| if (!cmd_el->set) { |
| command->reply = "SET not implemented"; |
| goto out; |
| } |
| if (cmd_el->verify) { |
| if ((ret = cmd_el->verify(command, command->value, data))) { |
| ret = CTRL_CMD_ERROR; |
| /* If verify() set an appropriate error message, don't change it. */ |
| if (!command->reply) |
| command->reply = "Value failed verification."; |
| goto out; |
| } |
| } |
| ret = cmd_el->set(command, data); |
| goto out; |
| } else if (command->type == CTRL_TYPE_GET) { |
| if (!cmd_el->get) { |
| command->reply = "GET not implemented"; |
| goto out; |
| } |
| ret = cmd_el->get(command, data); |
| goto out; |
| } |
| out: |
| if (ret == CTRL_CMD_REPLY) { |
| if (command->type == CTRL_TYPE_SET) { |
| command->type = CTRL_TYPE_SET_REPLY; |
| } else if (command->type == CTRL_TYPE_GET) { |
| command->type = CTRL_TYPE_GET_REPLY; |
| } |
| } else if (ret == CTRL_CMD_ERROR) { |
| command->type = CTRL_TYPE_ERROR; |
| } |
| return ret; |
| } |
| |
| static void add_word(struct ctrl_cmd_struct *cmd, |
| const char *start, const char *end) |
| { |
| if (!cmd->command) { |
| cmd->command = talloc_zero_array(tall_vty_vec_ctx, |
| char*, 1); |
| cmd->nr_commands = 0; |
| } else { |
| cmd->command = talloc_realloc(tall_vty_vec_ctx, |
| cmd->command, char*, |
| cmd->nr_commands + 1); |
| } |
| |
| cmd->command[cmd->nr_commands++] = talloc_strndup(cmd->command, |
| start, end - start); |
| } |
| |
| static void create_cmd_struct(struct ctrl_cmd_struct *cmd, const char *name) |
| { |
| const char *cur, *word; |
| |
| for (cur = name, word = NULL; cur[0] != '\0'; ++cur) { |
| /* warn about optionals */ |
| if (cur[0] == '(' || cur[0] == ')' || cur[0] == '|') { |
| LOGP(DLCTRL, LOGL_ERROR, |
| "Optionals are not supported in '%s'\n", name); |
| goto failure; |
| } |
| |
| if (isspace(cur[0])) { |
| if (word) { |
| add_word(cmd, word, cur); |
| word = NULL; |
| } |
| continue; |
| } |
| |
| if (!word) |
| word = cur; |
| } |
| |
| if (word) |
| add_word(cmd, word, cur); |
| |
| return; |
| failure: |
| cmd->nr_commands = 0; |
| talloc_free(cmd->command); |
| } |
| |
| /*! Install a given command definition at a given CTRL node. |
| * \param[in] node CTRL node at which \a cmd is to be installed |
| * \param[in] cmd command definition to be installed |
| * \returns 0 on success; negative on error */ |
| int ctrl_cmd_install(enum ctrl_node_type node, struct ctrl_cmd_element *cmd) |
| { |
| vector cmds_vec; |
| |
| /* If this assert triggers, it means the program forgot to initialize |
| * the CTRL interface first by calling ctrl_handle_alloc(2)() directly |
| * or indirectly through ctrl_interface_setup_dynip(2)() |
| */ |
| if (!ctrl_node_vec) { |
| LOGP(DLCTRL, LOGL_ERROR, |
| "ctrl_handle must be initialized prior to installing cmds.\n"); |
| return -ENODEV; |
| } |
| |
| cmds_vec = vector_lookup_ensure(ctrl_node_vec, node); |
| |
| if (!cmds_vec) { |
| cmds_vec = vector_init(5); |
| if (!cmds_vec) { |
| LOGP(DLCTRL, LOGL_ERROR, "vector_init failed.\n"); |
| return -ENOMEM; |
| } |
| vector_set_index(ctrl_node_vec, node, cmds_vec); |
| } |
| |
| vector_set(cmds_vec, cmd); |
| |
| create_cmd_struct(&cmd->strcmd, cmd->name); |
| return 0; |
| } |
| |
| /*! Allocate a control command of given \a type. |
| * \param[in] ctx talloc context from which to allocate |
| * \param[in] type command type to set after allocation |
| * \returns callee-allocated \ref ctrl_cmd. Caller must talloc_free() it. */ |
| struct ctrl_cmd *ctrl_cmd_create(void *ctx, enum ctrl_type type) |
| { |
| struct ctrl_cmd *cmd; |
| |
| cmd = talloc_zero(ctx, struct ctrl_cmd); |
| if (!cmd) |
| return NULL; |
| |
| cmd->type = type; |
| return cmd; |
| } |
| |
| /*! Perform a deepl copy of the given \a cmd, allocating memory from \a ctx. |
| * \param[in] ctx talloc context from which to allocate |
| * \param[in cmd CTRL command to be copied |
| * \returns deep copy of \a cmd on success; NULL on error */ |
| struct ctrl_cmd *ctrl_cmd_cpy(void *ctx, struct ctrl_cmd *cmd) |
| { |
| struct ctrl_cmd *cmd2; |
| |
| cmd2 = talloc_zero(ctx, struct ctrl_cmd); |
| if (!cmd2) |
| return NULL; |
| |
| cmd2->type = cmd->type; |
| if (cmd->id) { |
| cmd2->id = talloc_strdup(cmd2, cmd->id); |
| if (!cmd2->id) |
| goto err; |
| } |
| if (cmd->variable) { |
| cmd2->variable = talloc_strdup(cmd2, cmd->variable); |
| if (!cmd2->variable) |
| goto err; |
| } |
| if (cmd->value) { |
| cmd2->value = talloc_strdup(cmd2, cmd->value); |
| if (!cmd2->value) |
| goto err; |
| } |
| if (cmd->reply) { |
| cmd2->reply = talloc_strdup(cmd2, cmd->reply); |
| if (!cmd2->reply) |
| goto err; |
| } |
| |
| return cmd2; |
| err: |
| talloc_free(cmd2); |
| return NULL; |
| } |
| |
| /*! Parse/Decode CTRL from \ref msgb into command struct. |
| * \param[in] ctx talloc context from which to allocate |
| * \param[in] msg message buffer containing command to be decoded |
| * \returns callee-allocated decoded CTRL command; NULL on allocation or other failure |
| * The caller is responsible to talloc_free() the returned struct pointer. */ |
| struct ctrl_cmd *ctrl_cmd_parse(void *ctx, struct msgb *msg) |
| { |
| struct ctrl_cmd *res = ctrl_cmd_parse2(ctx, msg); |
| if (res->type == CTRL_TYPE_ERROR) { |
| talloc_free(res); |
| return NULL; |
| } |
| return res; |
| } |
| |
| static bool id_str_valid(const char *str) |
| { |
| for (;*str;str++) { |
| if (!isdigit(*str)) |
| return false; |
| } |
| return true; |
| } |
| |
| /*! Parse/Decode CTRL from \ref msgb into command struct. |
| * \param[in] ctx talloc context from which to allocate |
| * \param[in] msg message buffer containing command to be decoded |
| * \returns callee-allocated decoded CTRL command; NULL on allocation failure, |
| * ctrl->type == CTRL_TYPE_ERROR and an error message in ctrl->reply on any error. |
| * The caller is responsible to talloc_free() the returned struct pointer. |
| * If information of the origin of the ERROR cmd returned is required (received |
| * or local parsing failure), use \ref ctrl_cmd_parse3 instead. */ |
| struct ctrl_cmd *ctrl_cmd_parse2(void *ctx, struct msgb *msg) |
| { |
| bool unused; |
| return ctrl_cmd_parse3(ctx, msg, &unused); |
| } |
| |
| /*! Parse/Decode CTRL from \ref msgb into command struct. |
| * \param[in] ctx talloc context from which to allocate |
| * \param[in] msg message buffer containing command to be decoded |
| * \param[out] parse_failed Whether returned ERROR cmd was generatd locally |
| * (due to parse failure) or was received. |
| * \returns callee-allocated decoded CTRL command; NULL on allocation failure, |
| * ctrl->type == CTRL_TYPE_ERROR and an error message in ctrl->reply on any error. |
| * The caller is responsible to talloc_free() the returned struct pointer. */ |
| struct ctrl_cmd *ctrl_cmd_parse3(void *ctx, struct msgb *msg, bool *parse_failed) |
| { |
| char *str, *tmp, *saveptr = NULL; |
| char *var, *val; |
| struct ctrl_cmd *cmd; |
| |
| cmd = talloc_zero(ctx, struct ctrl_cmd); |
| if (!cmd) { |
| LOGP(DLCTRL, LOGL_ERROR, "Failed to allocate.\n"); |
| *parse_failed = true; |
| return NULL; |
| } |
| |
| /* Make sure input is NULL terminated */ |
| msgb_put_u8(msg, 0); |
| str = (char *) msg->l2h; |
| |
| OSMO_ASSERT(str); |
| tmp = strtok_r(str, " ", &saveptr); |
| if (!tmp) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->id = "err"; |
| cmd->reply = "Request malformed"; |
| LOGP(DLCTRL, LOGL_NOTICE, "Malformed request: \"%s\"\n", osmo_escape_str(str, -1)); |
| goto err; |
| } |
| |
| cmd->type = get_string_value(ctrl_type_vals, tmp); |
| if ((int)cmd->type < 0 || cmd->type == CTRL_TYPE_UNKNOWN) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->id = "err"; |
| cmd->reply = "Request type unknown"; |
| LOGP(DLCTRL, LOGL_NOTICE, "Request type unknown: \"%s\"\n", osmo_escape_str(str, -1)); |
| goto err; |
| } |
| |
| tmp = strtok_r(NULL, " ", &saveptr); |
| |
| if (!tmp) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->id = "err"; |
| cmd->reply = "Missing ID"; |
| LOGP(DLCTRL, LOGL_NOTICE, "Missing ID: \"%s\"\n", osmo_escape_str(str, -1)); |
| goto err; |
| } |
| |
| if (!id_str_valid(tmp) && |
| !(cmd->type == CTRL_TYPE_ERROR && strcmp(tmp, "err") == 0)) { |
| LOGP(DLCTRL, LOGL_NOTICE, "Invalid %s message ID number: \"%s\"\n", |
| get_value_string(ctrl_type_vals, cmd->type), osmo_escape_str(tmp, -1)); |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->id = "err"; |
| cmd->reply = "Invalid message ID number"; |
| goto err; |
| } |
| cmd->id = talloc_strdup(cmd, tmp); |
| if (!cmd->id) |
| goto oom; |
| |
| switch (cmd->type) { |
| case CTRL_TYPE_GET: |
| var = strtok_r(NULL, " \n", &saveptr); |
| if (!var) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "GET incomplete"; |
| LOGP(DLCTRL, LOGL_NOTICE, "GET Command incomplete: \"%s\"\n", |
| osmo_escape_str(str, -1)); |
| goto err; |
| } |
| if (!osmo_separated_identifiers_valid(var, ".")) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "GET variable contains invalid characters"; |
| LOGP(DLCTRL, LOGL_NOTICE, "GET variable contains invalid characters: \"%s\"\n", |
| osmo_escape_str(var, -1)); |
| goto err; |
| } |
| cmd->variable = talloc_strdup(cmd, var); |
| var = strtok_r(NULL, "", &saveptr); |
| if (var) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "GET with trailing characters"; |
| LOGP(DLCTRL, LOGL_NOTICE, "GET with trailing characters: \"%s\"\n", |
| osmo_escape_str(var, -1)); |
| goto err; |
| } |
| LOGP(DLCTRL, LOGL_DEBUG, "Command: GET %s\n", cmd->variable); |
| break; |
| case CTRL_TYPE_SET: |
| var = strtok_r(NULL, " ", &saveptr); |
| val = strtok_r(NULL, "\n", &saveptr); |
| if (!var || !val) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "SET incomplete"; |
| LOGP(DLCTRL, LOGL_NOTICE, "SET Command incomplete\n"); |
| goto err; |
| } |
| if (!osmo_separated_identifiers_valid(var, ".")) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "SET variable contains invalid characters"; |
| LOGP(DLCTRL, LOGL_NOTICE, "SET variable contains invalid characters: \"%s\"\n", |
| osmo_escape_str(var, -1)); |
| goto err; |
| } |
| cmd->variable = talloc_strdup(cmd, var); |
| cmd->value = talloc_strdup(cmd, val); |
| if (!cmd->variable || !cmd->value) |
| goto oom; |
| |
| var = strtok_r(NULL, "", &saveptr); |
| if (var) { |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "SET with trailing characters"; |
| LOGP(DLCTRL, LOGL_NOTICE, "SET with trailing characters: \"%s\"\n", |
| osmo_escape_str(var, -1)); |
| goto err; |
| } |
| |
| LOGP(DLCTRL, LOGL_DEBUG, "Command: SET %s = \"%s\"\n", cmd->variable, |
| osmo_escape_str(cmd->value, -1)); |
| break; |
| #define REPLY_CASE(TYPE, NAME) \ |
| case TYPE: \ |
| var = strtok_r(NULL, " ", &saveptr); \ |
| val = strtok_r(NULL, "", &saveptr); \ |
| if (!var) { \ |
| cmd->type = CTRL_TYPE_ERROR; \ |
| cmd->reply = NAME " incomplete"; \ |
| LOGP(DLCTRL, LOGL_NOTICE, NAME " incomplete\n"); \ |
| goto err; \ |
| } \ |
| if (!osmo_separated_identifiers_valid(var, ".")) { \ |
| cmd->type = CTRL_TYPE_ERROR; \ |
| cmd->reply = NAME " variable contains invalid characters"; \ |
| LOGP(DLCTRL, LOGL_NOTICE, NAME " variable contains invalid characters: \"%s\"\n", \ |
| osmo_escape_str(var, -1)); \ |
| goto err; \ |
| } \ |
| cmd->variable = talloc_strdup(cmd, var); \ |
| cmd->reply = talloc_strdup(cmd, val); \ |
| if (!cmd->variable || !cmd->reply) \ |
| goto oom; \ |
| LOGP(DLCTRL, LOGL_DEBUG, "Command: " NAME " %s: %s\n", cmd->variable, \ |
| osmo_escape_str(cmd->reply, -1)); \ |
| break |
| REPLY_CASE(CTRL_TYPE_GET_REPLY, "GET REPLY"); |
| REPLY_CASE(CTRL_TYPE_SET_REPLY, "SET REPLY"); |
| REPLY_CASE(CTRL_TYPE_TRAP, "TRAP"); |
| #undef REPLY_CASE |
| case CTRL_TYPE_ERROR: |
| var = strtok_r(NULL, "", &saveptr); |
| if (!var) { |
| cmd->reply = ""; |
| goto err; |
| } |
| cmd->reply = talloc_strdup(cmd, var); |
| if (!cmd->reply) |
| goto oom; |
| LOGP(DLCTRL, LOGL_DEBUG, "Command: ERROR \"%s\"\n", |
| osmo_escape_str(cmd->reply, -1)); |
| break; |
| case CTRL_TYPE_UNKNOWN: |
| default: |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->reply = "Unknown type"; |
| goto err; |
| } |
| |
| *parse_failed = false; |
| return cmd; |
| oom: |
| cmd->type = CTRL_TYPE_ERROR; |
| cmd->id = "err"; |
| cmd->reply = "OOM"; |
| err: |
| *parse_failed = true; |
| return cmd; |
| } |
| |
| /*! Encode a given CTRL command from its parsed form into a message buffer. |
| * \param[in] cmd decoded/parsed form of to-be-encoded command |
| * \returns callee-allocated message buffer containing the encoded \a cmd; NULL on error */ |
| struct msgb *ctrl_cmd_make(struct ctrl_cmd *cmd) |
| { |
| struct msgb *msg = NULL; |
| char *strbuf; |
| size_t len; |
| const char *type; |
| |
| if (!cmd->id) |
| return NULL; |
| |
| type = get_value_string(ctrl_type_vals, cmd->type); |
| |
| switch (cmd->type) { |
| case CTRL_TYPE_GET: |
| if (!cmd->variable) |
| return NULL; |
| strbuf = talloc_asprintf(cmd, "%s %s %s", type, cmd->id, cmd->variable); |
| break; |
| case CTRL_TYPE_SET: |
| if (!cmd->variable || !cmd->value) |
| return NULL; |
| strbuf = talloc_asprintf(cmd, "%s %s %s %s", type, cmd->id, |
| cmd->variable, cmd->value); |
| break; |
| case CTRL_TYPE_GET_REPLY: |
| case CTRL_TYPE_SET_REPLY: |
| case CTRL_TYPE_TRAP: |
| if (!cmd->variable || !cmd->reply) |
| return NULL; |
| strbuf = talloc_asprintf(cmd, "%s %s %s %s", type, cmd->id, |
| cmd->variable, cmd->reply); |
| break; |
| case CTRL_TYPE_ERROR: |
| if (!cmd->reply) |
| return NULL; |
| strbuf = talloc_asprintf(cmd, "%s %s %s", type, cmd->id, cmd->reply); |
| break; |
| default: |
| LOGP(DLCTRL, LOGL_NOTICE, "Unknown command type %i\n", cmd->type); |
| return NULL; |
| } |
| |
| if (!strbuf) { |
| LOGP(DLCTRL, LOGL_ERROR, "Failed to allocate cmd.\n"); |
| goto ret; |
| } |
| len = strlen(strbuf); |
| |
| msg = msgb_alloc_headroom(len + 128, 128, "ctrl ERROR command make"); |
| if (!msg) |
| goto ret; |
| msg->l2h = msgb_put(msg, len); |
| memcpy(msg->l2h, strbuf, len); |
| |
| ret: |
| talloc_free(strbuf); |
| return msg; |
| } |
| |
| /*! Build a deferred control command state and keep it the per-connection list of deferred commands. |
| * This function is typically called by a ctrl command handler that wishes to defer returning a |
| * response. The reutnred state can later be used to check if the deferred command is still alive, |
| * and to respond to the specific command. This only works to defer the response to GET and SET. |
| * \param[in] ctx talloc context from whihc to allocate the ctrl_cmd_def |
| * \param[in] cmd the control command whose response is deferred |
| * \param[in] data opaque, user-defined pointer |
| * \param[in] secs number of seconds until the command times out |
| * \returns callee-allocated ctrl_cmd_def */ |
| struct ctrl_cmd_def * |
| ctrl_cmd_def_make(const void *ctx, struct ctrl_cmd *cmd, void *data, unsigned int secs) |
| { |
| struct ctrl_cmd_def *cd; |
| |
| if (!cmd->ccon) |
| return NULL; |
| |
| cd = talloc_zero(ctx, struct ctrl_cmd_def); |
| |
| cmd->defer = cd; |
| cd->cmd = cmd; |
| cd->data = data; |
| |
| /* add to per-connection list of deferred commands */ |
| llist_add(&cd->list, &cmd->ccon->def_cmds); |
| |
| return cd; |
| } |
| |
| /*! Determine if the given deferred control command is still alive or a zombie. |
| * \param[in] cd deferred ctrl command state |
| * \returns 0 is \a cd is still alive; 1 if it's a zombie */ |
| int ctrl_cmd_def_is_zombie(struct ctrl_cmd_def *cd) |
| { |
| /* luckily we're still alive */ |
| if (cd->cmd) |
| return 0; |
| |
| /* if we are a zombie, make sure we really die */ |
| llist_del(&cd->list); |
| talloc_free(cd); |
| |
| return 1; |
| } |
| |
| /*! Send the response to a deferred ctrl command. |
| * The command can only be a resply to a SET or a GET operation. |
| * \param[in] cd deferred ctrl command state |
| * \returns 0 if command sent successfully; negative on error */ |
| int ctrl_cmd_def_send(struct ctrl_cmd_def *cd) |
| { |
| struct ctrl_cmd *cmd = cd->cmd; |
| |
| int rc; |
| |
| /* Deferred commands can only be responses to GET/SET or ERROR, but |
| * never TRAP or anything else */ |
| switch (cmd->type) { |
| case CTRL_TYPE_GET: |
| cmd->type = CTRL_TYPE_GET_REPLY; |
| break; |
| case CTRL_TYPE_SET: |
| cmd->type = CTRL_TYPE_SET_REPLY; |
| break; |
| default: |
| cmd->type = CTRL_TYPE_ERROR; |
| } |
| |
| rc = ctrl_cmd_send2(cmd->ccon, cmd); |
| |
| talloc_free(cmd); |
| llist_del(&cd->list); |
| talloc_free(cd); |
| |
| return rc; |
| } |