| /* |
| * Copyright (c) 2017 Linaro Limited |
| * Copyright (c) 2018-2019 Foundries.io |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /* |
| * Copyright (c) 2015, Yanzi Networks AB. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * Original Authors: |
| * Joakim Eriksson <joakime@sics.se> |
| * Niclas Finne <nfi@sics.se> |
| */ |
| |
| /* |
| * Zephyr Contribution by Michael Scott <michael.scott@linaro.org> |
| * - Zephyr code style changes / code cleanup |
| * - Move to Zephyr APIs where possible |
| * - Convert to Zephyr int/uint types |
| * - Remove engine dependency (replace with writer context) |
| * - Add write int64 function |
| */ |
| |
| /* |
| * TODO: |
| * - Type cleanups |
| * - Cleanup integer parsing |
| */ |
| |
| #define LOG_MODULE_NAME net_lwm2m_plain_text |
| #define LOG_LEVEL CONFIG_LWM2M_LOG_LEVEL |
| |
| #include <logging/log.h> |
| LOG_MODULE_REGISTER(LOG_MODULE_NAME); |
| |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <ctype.h> |
| |
| #include "lwm2m_object.h" |
| #include "lwm2m_rw_plain_text.h" |
| #include "lwm2m_engine.h" |
| |
| /* some temporary buffer space for format conversions */ |
| static char pt_buffer[42]; /* can handle float64 format */ |
| |
| size_t plain_text_put_format(struct lwm2m_output_context *out, |
| const char *format, ...) |
| { |
| va_list vargs; |
| int n; |
| |
| va_start(vargs, format); |
| n = vsnprintk(pt_buffer, sizeof(pt_buffer), format, vargs); |
| va_end(vargs); |
| if (n < 0) { |
| /* TODO: generate an error? */ |
| return 0; |
| } |
| |
| n = strlen(pt_buffer); |
| if (buf_append(CPKT_BUF_WRITE(out->out_cpkt), pt_buffer, n) < 0) { |
| return 0; |
| } |
| |
| return (size_t)n; |
| } |
| |
| static size_t put_s32(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, s32_t value) |
| { |
| return plain_text_put_format(out, "%d", value); |
| } |
| |
| static size_t put_s8(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, s8_t value) |
| { |
| return plain_text_put_format(out, "%d", value); |
| } |
| |
| static size_t put_s16(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, s16_t value) |
| { |
| return plain_text_put_format(out, "%d", value); |
| } |
| |
| static size_t put_s64(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, s64_t value) |
| { |
| return plain_text_put_format(out, "%lld", value); |
| } |
| |
| static size_t put_float32fix(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, |
| float32_value_t *value) |
| { |
| return plain_text_put_format(out, "%d.%d", |
| value->val1, value->val2); |
| } |
| |
| static size_t put_float64fix(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, |
| float64_value_t *value) |
| { |
| return plain_text_put_format(out, "%lld.%lld", |
| value->val1, value->val2); |
| } |
| |
| static size_t put_string(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, |
| char *buf, size_t buflen) |
| { |
| if (buf_append(CPKT_BUF_WRITE(out->out_cpkt), buf, buflen) < 0) { |
| return 0; |
| } |
| |
| return buflen; |
| } |
| |
| static size_t put_bool(struct lwm2m_output_context *out, |
| struct lwm2m_obj_path *path, |
| bool value) |
| { |
| if (value) { |
| return plain_text_put_format(out, "%u", 1); |
| } else { |
| return plain_text_put_format(out, "%u", 0); |
| } |
| } |
| |
| static int get_length_left(struct lwm2m_input_context *in) |
| { |
| return in->in_cpkt->offset - in->offset; |
| } |
| |
| static size_t plain_text_read_number(struct lwm2m_input_context *in, |
| s64_t *value1, |
| s64_t *value2, |
| bool accept_sign, bool accept_dot) |
| { |
| s64_t *counter = value1; |
| int i = 0; |
| bool neg = false; |
| bool dot_found = false; |
| u8_t tmp; |
| |
| /* initialize values to 0 */ |
| *value1 = 0; |
| if (value2) { |
| *value2 = 0; |
| } |
| |
| while (in->offset < in->in_cpkt->offset) { |
| if (buf_read_u8(&tmp, CPKT_BUF_READ(in->in_cpkt), |
| &in->offset) < 0) { |
| break; |
| } |
| |
| if (tmp == '-' && accept_sign && i == 0) { |
| neg = true; |
| } else if (tmp == '.' && i > 0 && accept_dot && !dot_found && |
| value2) { |
| dot_found = true; |
| counter = value2; |
| } else if (isdigit(tmp)) { |
| *counter = *counter * 10 + (tmp - '0'); |
| } else { |
| /* anything else stop reading */ |
| in->offset--; |
| break; |
| } |
| |
| i++; |
| } |
| |
| if (neg) { |
| *value1 = -*value1; |
| } |
| |
| return i; |
| } |
| |
| static size_t get_s32(struct lwm2m_input_context *in, s32_t *value) |
| { |
| s64_t tmp = 0; |
| size_t len = 0; |
| |
| len = plain_text_read_number(in, &tmp, NULL, true, false); |
| if (len > 0) { |
| *value = (s32_t)tmp; |
| } |
| |
| return len; |
| } |
| |
| static size_t get_s64(struct lwm2m_input_context *in, s64_t *value) |
| { |
| return plain_text_read_number(in, value, NULL, true, false); |
| } |
| |
| static size_t get_string(struct lwm2m_input_context *in, |
| u8_t *value, size_t buflen) |
| { |
| u16_t in_len = get_length_left(in); |
| |
| if (in_len > buflen) { |
| /* TODO: generate warning? */ |
| in_len = buflen - 1; |
| } |
| |
| if (buf_read(value, in_len, CPKT_BUF_READ(in->in_cpkt), |
| &in->offset) < 0) { |
| value[0] = '\0'; |
| return 0; |
| } |
| |
| value[in_len] = '\0'; |
| return (size_t)in_len; |
| } |
| |
| static size_t get_float32fix(struct lwm2m_input_context *in, |
| float32_value_t *value) |
| { |
| s64_t tmp1, tmp2; |
| size_t len = 0; |
| |
| len = plain_text_read_number(in, &tmp1, &tmp2, true, true); |
| if (len > 0) { |
| value->val1 = (s32_t)tmp1; |
| value->val2 = (s32_t)tmp2; |
| } |
| |
| return len; |
| } |
| |
| static size_t get_float64fix(struct lwm2m_input_context *in, |
| float64_value_t *value) |
| { |
| return plain_text_read_number(in, &value->val1, &value->val2, |
| true, true); |
| } |
| |
| static size_t get_bool(struct lwm2m_input_context *in, |
| bool *value) |
| { |
| u8_t tmp; |
| |
| if (buf_read_u8(&tmp, CPKT_BUF_READ(in->in_cpkt), &in->offset) < 0) { |
| return 0; |
| } |
| |
| if (tmp == '1' || tmp == '0') { |
| *value = (tmp == '1') ? true : false; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static size_t get_opaque(struct lwm2m_input_context *in, |
| u8_t *value, size_t buflen, bool *last_block) |
| { |
| in->opaque_len = get_length_left(in); |
| return lwm2m_engine_get_opaque_more(in, value, buflen, last_block); |
| } |
| |
| const struct lwm2m_writer plain_text_writer = { |
| .put_s8 = put_s8, |
| .put_s16 = put_s16, |
| .put_s32 = put_s32, |
| .put_s64 = put_s64, |
| .put_string = put_string, |
| .put_float32fix = put_float32fix, |
| .put_float64fix = put_float64fix, |
| .put_bool = put_bool, |
| }; |
| |
| const struct lwm2m_reader plain_text_reader = { |
| .get_s32 = get_s32, |
| .get_s64 = get_s64, |
| .get_string = get_string, |
| .get_float32fix = get_float32fix, |
| .get_float64fix = get_float64fix, |
| .get_bool = get_bool, |
| .get_opaque = get_opaque, |
| }; |
| |
| int do_read_op_plain_text(struct lwm2m_engine_obj *obj, |
| struct lwm2m_message *msg, int content_format) |
| { |
| /* Plain text can only return single resource */ |
| if (msg->path.level != 3U) { |
| return -EPERM; /* NOT_ALLOWED */ |
| } |
| |
| return lwm2m_perform_read_op(obj, msg, content_format); |
| } |
| |
| int do_write_op_plain_text(struct lwm2m_engine_obj *obj, |
| struct lwm2m_message *msg) |
| { |
| struct lwm2m_engine_obj_inst *obj_inst = NULL; |
| struct lwm2m_engine_obj_field *obj_field; |
| struct lwm2m_engine_res_inst *res = NULL; |
| int ret, i; |
| u8_t created = 0U; |
| |
| ret = lwm2m_get_or_create_engine_obj(msg, &obj_inst, &created); |
| if (ret < 0) { |
| return ret; |
| } |
| |
| obj_field = lwm2m_get_engine_obj_field(obj, msg->path.res_id); |
| if (!obj_field) { |
| return -ENOENT; |
| } |
| |
| if (!LWM2M_HAS_PERM(obj_field, LWM2M_PERM_W)) { |
| return -EPERM; |
| } |
| |
| if (!obj_inst->resources || obj_inst->resource_count == 0U) { |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < obj_inst->resource_count; i++) { |
| if (obj_inst->resources[i].res_id == msg->path.res_id) { |
| res = &obj_inst->resources[i]; |
| break; |
| } |
| } |
| |
| if (!res) { |
| return -ENOENT; |
| } |
| |
| msg->path.level = 3U; |
| return lwm2m_write_handler(obj_inst, res, obj_field, msg); |
| } |