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Merge branch 'publish' into master

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This commit is contained in:
A.M. Rowsell 2018-08-18 06:05:42 -04:00
commit 16355bc42f
Signed by: amr
GPG key ID: 0B6E2D8375CF79A9
2 changed files with 126 additions and 28 deletions
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2
.gitignore vendored
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@ -4,6 +4,6 @@
*.pdf
*.map
mqtt
trace*
\#*\#
.\#*
*.pcap

152
mqtt.c
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@ -1,3 +1,7 @@
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <stdint.h>
#include "user_interface.h"
#include "ets_sys.h"
@ -29,6 +33,11 @@ LOCAL void ICACHE_FLASH_ATTR data_sent_callback(void *arg) {
LOCAL void ICACHE_FLASH_ATTR data_recv_callback(void *arg, char *pdata, unsigned short len) {
// deal with received data
os_printf("Received data of length %d -- %s \r\n", len, pdata);
os_printf("Hex dump: ");
for(int i = 0; i < len; i++) {
os_printf("%x", pdata[i]);
}
os_printf("\n");
}
LOCAL void ICACHE_FLASH_ATTR connected_callback(void *arg) {
@ -85,10 +94,6 @@ LOCAL uint8_t ICACHE_FLASH_ATTR tcpConnect(void *arg) {
return 0;
}
LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_connect(mqtt_session_t *session, uint8_t *username, uint8_t *password) {
}
/************************************************************************************************/
/* Function: encodeLength */
/* Parameters: the length in bytes */
@ -133,13 +138,14 @@ LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_send(mqtt_session_t *session, uint8_t *data
LOCAL mqtt_packet_t packet;
LOCAL mqtt_packet_t *pPacket = &packet;
uint8_t *fullPacket;
uint8_t *remaining_len_encoded;
switch(msgType) {
case MQTT_MSG_TYPE_CONNECT: ; // <-- do not remove this semicolon!!
const uint8_t varDefaults[10] = { 0x00, 0x04, 0x4D, 0x51, 0x54, 0x54, 0x04, 0xC2, 0x00, 0x32 }; // variable header is always the same for Connect
pPacket->fixedHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * 5); // fixed header cannot be longer than 5
pPacket->fixedHeader[0] = ((uint8_t)msgType << 4) & 0xF0; // make sure lower 4 are clear
// prepare variable header
pPacket->varHeader = os_zalloc(sizeof(uint8_t) * 10); // 10 bytes for connect
pPacket->varHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * 10); // 10 bytes for connect
os_memcpy(pPacket->varHeader, varDefaults, 10); // copy defaults
pPacket->varHeader_len = 10;
// prepare payload
@ -172,38 +178,53 @@ LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_send(mqtt_session_t *session, uint8_t *data
offset += session->password_len;
pPacket->payload_len = offset; // the length of the payload is the same as our offset
#ifdef DEBUG
os_printf("Total offset: %d", offset);
os_printf("Total offset: %d\n", offset);
#endif
// the remaining length is the size of the packet, minus the first byte and the bytes taken by the remaining length bytes themselves
// they are encoded per the MQTT spec, section 2.2.3
// the first byte returned by encodeLength is the number of bytes to follow, as it can be anywhere from 1 to 4 bytes to encode the length
uint8_t *remaining_len_encoded = encodeLength((uint32_t)(pPacket->varHeader_len + pPacket->payload_len));
remaining_len_encoded = encodeLength((uint32_t)(pPacket->varHeader_len + pPacket->payload_len));
os_memcpy(pPacket->fixedHeader + 1, remaining_len_encoded + 1, remaining_len_encoded[0]);
pPacket->fixedHeader_len = remaining_len_encoded[0] + 1; // fixed header length is the number of bytes used to encode the remaining length, plus 1 for the fixed CONNECT byte
// the full length is the length of the varHeader, payload, and fixedHeader
pPacket->length = (pPacket->varHeader_len + pPacket->payload_len + pPacket->fixedHeader_len);
#ifdef DEBUG
os_printf("Packet length: %d\n", pPacket->length);
#endif
// construct packet data
fullPacket = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->length);
os_memcpy(fullPacket, pPacket->fixedHeader, pPacket->fixedHeader_len);
os_memcpy(fullPacket + pPacket->fixedHeader_len, pPacket->varHeader, pPacket->varHeader_len);
os_memcpy(fullPacket + pPacket->fixedHeader_len + pPacket->varHeader_len, pPacket->payload, pPacket->payload_len);
break;
case MQTT_MSG_TYPE_PUBLISH: ; // <-- leave this semicolon!
// prepare for publish
pPacket->fixedHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * 5);
pPacket->fixedHeader[0] = (MQTT_MSG_TYPE_PUBLISH << 4) & 0xF0; // clear lower 4 bits, we don't need DUP, QOS or RETAIN
// variable header
pPacket->varHeader_len = session->topic_name_len + 2; // we have no packet identifier, as we are QOS 0
pPacket->varHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->varHeader_len);
os_memset(pPacket->varHeader, 0, 1);
os_memcpy(pPacket->varHeader + 1, &pPacket->varHeader_len, 1);
os_memcpy(pPacket->varHeader + 2, session->topic_name, session->topic_name_len);
//payload
pPacket->payload_len = len;
pPacket->payload = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->payload_len);
os_memcpy(pPacket->payload, data, pPacket->payload_len);
// calculate remaining length for fixed header
remaining_len_encoded = encodeLength((uint32_t)(pPacket->varHeader_len + pPacket->payload_len));
os_memcpy(pPacket->fixedHeader + 1, remaining_len_encoded + 1, remaining_len_encoded[0]);
pPacket->fixedHeader_len = remaining_len_encoded[0] + 1; // fixed header length is the number of bytes used to encode the remaining length, plus 1 for the fixed CONNECT byte
// the full length is the length of the varHeader, payload, and fixedHeader
pPacket->length = (pPacket->varHeader_len + pPacket->payload_len + pPacket->fixedHeader_len);
os_printf("Packet length: %d\n", pPacket->length);
// construct packet data
fullPacket = os_zalloc(sizeof(uint8_t) * pPacket->length);
fullPacket = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->length);
os_memcpy(fullPacket, pPacket->fixedHeader, pPacket->fixedHeader_len);
os_memcpy(fullPacket + pPacket->fixedHeader_len, pPacket->varHeader, pPacket->varHeader_len);
os_memcpy(fullPacket + pPacket->fixedHeader_len + pPacket->varHeader_len, pPacket->payload, pPacket->payload_len);
break;
case MQTT_MSG_TYPE_PUBLISH: ; // <-- leave this semicolon!
uint32_t offset = 0;
// prepare for publish
pPacket->fixedHeader = os_zalloc(sizeof(uint8_t) * 5);
pPacket->fixedHeader = (MQTT_MSG_TYPE_PUBLISH << 4) & 0xF0; // clear lower 4 bits, we don't need DUP, QOS or RETAIN
// variable header
pPacket->varHeader_len = session->topic_name_len + 2; // we have no packet identifier, as we are QOS 0
pPacket->varHeader = os_zalloc(sizeof(uint8_t) * pPacket->varHeader_len);
os_memset(pPacket->varHeader, 0, 1);
os_memcpy(pPacket->varHeader + 1, pPacket->varHeader_len, 1);
os_memcpy(pPacket->varHeader + 2, session->topic_name, session->topic_name_len);
//payload
break;
case MQTT_MSG_TYPE_SUBSCRIBE:
// prepare for subscribe
@ -212,10 +233,37 @@ LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_send(mqtt_session_t *session, uint8_t *data
// prepare for unsubscribe
break;
case MQTT_MSG_TYPE_PINGREQ:
// prepare for ping
// PINGREQ has no varHeader or payload, it's just two bytes
// 0xC0 0x00
pPacket->fixedHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * 2);
pPacket->fixedHeader[0] = (MQTT_MSG_TYPE_PINGREQ << 4) & 0xF0; // bottom nibble must be clear
pPacket->fixedHeader[1] = 0; // remaining length is zero
pPacket->fixedHeader_len = 2;
pPacket->length = pPacket->fixedHeader_len;
// In order to avoid undefined behaviour, we must allocate
// something to varHeader and payload, as they get passed
// to free() at the end of this function
pPacket->varHeader = (uint8_t *)os_zalloc(1);
pPacket->payload = (uint8_t *)os_zalloc(1);
// copy the fixedHeader to fullPacket, and we're done!
fullPacket = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->length);
os_memcpy(fullPacket, pPacket->fixedHeader, pPacket->fixedHeader_len);
break;
case MQTT_MSG_TYPE_DISCONNECT:
// disconnect from broker
// DISCONNECT is almost identical to PINGREQ:
pPacket->fixedHeader = (uint8_t *)os_zalloc(sizeof(uint8_t) * 2);
pPacket->fixedHeader[0] = (MQTT_MSG_TYPE_DISCONNECT << 4) & 0xF0; // bottom nibble must be clear
pPacket->fixedHeader[1] = 0; // remaining length is zero
pPacket->fixedHeader_len = 2;
pPacket->length = pPacket->fixedHeader_len;
// In order to avoid undefined behaviour, we must allocate
// something to varHeader and payload, as they get passed
// to free() at the end of this function
pPacket->varHeader = (uint8_t *)os_zalloc(1);
pPacket->payload = (uint8_t *)os_zalloc(1);
// copy the fixedHeader to fullPacket, and we're done!
fullPacket = (uint8_t *)os_zalloc(sizeof(uint8_t) * pPacket->length);
os_memcpy(fullPacket, pPacket->fixedHeader, pPacket->fixedHeader_len);
break;
default:
// something has gone wrong
@ -223,7 +271,7 @@ LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_send(mqtt_session_t *session, uint8_t *data
return -1;
}
#ifdef DEBUG
os_printf("About to send MQTT connect...\n");
os_printf("About to send MQTT: %d...\n", (uint8_t)msgType);
#endif
espconn_send(session->activeConnection, fullPacket, pPacket->length);
os_free(fullPacket);
@ -232,10 +280,60 @@ LOCAL uint8_t ICACHE_FLASH_ATTR mqtt_send(mqtt_session_t *session, uint8_t *data
os_free(pPacket->payload);
}
/*********************************************/
/* EVERYTHING FROM HERE DOWN IS SIMPLY */
/* SIMULATING WHAT A USER WOULD DO WITH THIS */
/* API. IT'S NOT PART OF THE LIBRARY. */
/* IT'S JUST HERE FOR TESTING. */
/*********************************************/
LOCAL void ICACHE_FLASH_ATTR test2(void *arg);
LOCAL void ICACHE_FLASH_ATTR ping(void *arg);
LOCAL void ICACHE_FLASH_ATTR discon(void*arg);
LOCAL void ICACHE_FLASH_ATTR test(void *arg) {
os_printf("Entered test!\n");
mqtt_session_t *pSession = (mqtt_session_t *)arg;
mqtt_send(pSession, NULL, 0, MQTT_MSG_TYPE_CONNECT);
os_timer_disarm(&oneTimer);
os_timer_setfn(&oneTimer, (os_timer_func_t *)test2, arg);
os_timer_arm(&oneTimer, 2000, 0);
}
LOCAL void ICACHE_FLASH_ATTR test2(void *arg) {
os_printf("Entered test2!\n");
mqtt_session_t *pSession = (mqtt_session_t *)arg;
uint8_t data[] = "value: 15";
uint32_t dataLen = os_strlen(data);
uint8_t topicName[] = "test";
uint32_t topicNameLen = os_strlen(topicName);
pSession->topic_name = &topicName[0];
pSession->topic_name_len = topicNameLen;
mqtt_send(pSession, &data[0], dataLen, MQTT_MSG_TYPE_PUBLISH);
os_timer_disarm(&oneTimer);
os_timer_setfn(&oneTimer, (os_timer_func_t *)ping, arg);
os_timer_arm(&oneTimer, 2000, 0);
}
LOCAL void ICACHE_FLASH_ATTR ping(void *arg) {
#ifdef DEBUG
os_printf("Entered ping!\n");
#endif
mqtt_session_t *pSession = (mqtt_session_t *)arg;
mqtt_send(pSession, NULL, 0, MQTT_MSG_TYPE_PINGREQ);
os_timer_disarm(&oneTimer);
os_timer_setfn(&oneTimer, (os_timer_func_t *)discon, arg);
os_timer_arm(&oneTimer, 2000, 0);
}
LOCAL void ICACHE_FLASH_ATTR discon(void *arg) {
#ifdef DEBUG
os_printf("Entered discon!\n");
#endif
mqtt_session_t *pSession = (mqtt_session_t *)arg;
mqtt_send(pSession, NULL, 0, MQTT_MSG_TYPE_DISCONNECT);
}
void ICACHE_FLASH_ATTR user_init() {