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uh, some stuff

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master
Ondřej Hruška 7 years ago
parent 5dec30d19c
commit 6dce9ec8e3
Signed by: MightyPork
GPG Key ID: 2C5FD5035250423D
12 changed files with 830 additions and 748 deletions
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  1. 16
      CMakeLists.txt
  2. 5
      gex/gex_client.c
  3. 8
      gex/protocol/TF_Integration.c
  4. 560
      gex/protocol/TinyFrame.c
  5. 185
      gex/protocol/TinyFrame.h
  6. 0
      gex/utils/hexdump.c
  7. 0
      gex/utils/hexdump.h
  8. 0
      gex/utils/payload_builder.c
  9. 0
      gex/utils/payload_builder.h
  10. 0
      gex/utils/payload_parser.c
  11. 0
      gex/utils/payload_parser.h
  12. 0
      gex/utils/type_coerce.h

16
CMakeLists.txt
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@ -9,17 +9,17 @@ set(SOURCE_FILES
gex/serial/serial.h
gex/gex_client.c
gex/gex_client.h
gex/hexdump.c
gex/hexdump.h
gex/TF_Integration.c
gex/protocol/payload_builder.c
gex/protocol/payload_builder.h
gex/protocol/payload_parser.c
gex/protocol/payload_parser.h
gex/utils/hexdump.c
gex/utils/hexdump.h
gex/protocol/TF_Integration.c
gex/utils/payload_builder.c
gex/utils/payload_builder.h
gex/utils/payload_parser.c
gex/utils/payload_parser.h
gex/protocol/TF_Config.h
gex/protocol/TinyFrame.c
gex/protocol/TinyFrame.h
gex/protocol/type_coerce.h
gex/utils/type_coerce.h
)
include_directories(

5
gex/gex_client.c
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@ -7,17 +7,16 @@
#include <unistd.h>
#include <signal.h>
#include <stdlib.h>
#include <protocol/TinyFrame.h>
#include <string.h>
#include <errno.h>
#include "TinyFrame.h"
#include "gex_client.h"
#include "serial.h"
#include "hexdump.h"
int gex_serial_fd = -1;
/** ^C handler to close it gracefully */
static void sigintHandler(int sig)
{
if (gex_serial_fd != -1) {

8
gex/TF_Integration.c → gex/protocol/TF_Integration.c
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@ -6,9 +6,9 @@
#include <assert.h>
#include <errno.h>
void TF_WriteImpl(const uint8_t *buff, size_t len)
void TF_WriteImpl(TinyFrame *tf, const uint8_t *buff, size_t len)
{
assert(gex_serial_fd != 0);
assert(gex_serial_fd != 0); // TODO update after TF has instances
ssize_t rv = write(gex_serial_fd, buff, len);
if (rv != len) {
@ -17,13 +17,13 @@ void TF_WriteImpl(const uint8_t *buff, size_t len)
}
/** Claim the TX interface before composing and sending a frame */
void TF_ClaimTx(void)
void TF_ClaimTx(TinyFrame *tf)
{
//
}
/** Free the TX interface after composing and sending a frame */
void TF_ReleaseTx(void)
void TF_ReleaseTx(TinyFrame *tf)
{
//
}

560
gex/protocol/TinyFrame.c
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@ -1,6 +1,6 @@
//---------------------------------------------------------------------------
#include "TinyFrame.h"
#include <string.h>
#include <malloc.h>
//---------------------------------------------------------------------------
// Compatibility with ESP8266 SDK
@ -14,71 +14,9 @@
#define TF_MAX(a, b) ((a)>(b)?(a):(b))
#define TF_MIN(a, b) ((a)<(b)?(a):(b))
enum TFState {
TFState_SOF = 0, //!< Wait for SOF
TFState_LEN, //!< Wait for Number Of Bytes
TFState_HEAD_CKSUM, //!< Wait for header Checksum
TFState_ID, //!< Wait for ID
TFState_TYPE, //!< Wait for message type
TFState_DATA, //!< Receive payload
TFState_DATA_CKSUM //!< Wait for Checksum
};
typedef struct _IdListener_struct_ {
TF_ID id;
TF_Listener fn;
TF_TICKS timeout; // nr of ticks remaining to disable this listener
TF_TICKS timeout_max; // the original timeout is stored here
void *userdata;
void *userdata2;
} IdListener;
typedef struct _TypeListener_struct_ {
TF_TYPE type;
TF_Listener fn;
} TypeListener;
typedef struct _GenericListener_struct_ {
TF_Listener fn;
} GenericListener;
/**
* Frame parser internal state
*/
static struct TinyFrameStruct {
/* Own state */
TF_Peer peer_bit; //!< Own peer bit (unqiue to avoid msg ID clash)
TF_ID next_id; //!< Next frame / frame chain ID
/* Parser state */
enum TFState state;
TF_TICKS parser_timeout_ticks;
TF_ID id; //!< Incoming packet ID
TF_LEN len; //!< Payload length
uint8_t data[TF_MAX_PAYLOAD_RX]; //!< Data byte buffer
TF_LEN rxi; //!< Field size byte counter
TF_CKSUM cksum; //!< Checksum calculated of the data stream
TF_CKSUM ref_cksum; //!< Reference checksum read from the message
TF_TYPE type; //!< Collected message type number
bool discard_data; //!< Set if (len > TF_MAX_PAYLOAD) to read the frame, but ignore the data.
/* --- Callbacks --- */
/* Transaction callbacks */
IdListener id_listeners[TF_MAX_ID_LST];
TypeListener type_listeners[TF_MAX_TYPE_LST];
GenericListener generic_listeners[TF_MAX_GEN_LST];
// Those counters are used to optimize look-up times.
// They point to the highest used slot number,
// or close to it, depending on the removal order.
TF_COUNT count_id_lst;
TF_COUNT count_type_lst;
TF_COUNT count_generic_lst;
// Buffer for building frames
uint8_t sendbuf[TF_SENDBUF_LEN];
} tf;
// TODO It would be nice to have per-instance configurable checksum types, but that would
// mandate configurable field sizes unless we use u32 everywhere (and possibly shorten
// it when encoding to the buffer). I don't really like this idea so much. -MP
//region Checksums
@ -98,6 +36,7 @@ static struct TinyFrameStruct {
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC16
// TODO try to replace with an algorithm
/** CRC table for the CRC-16. The poly is 0x8005 (x^16 + x^15 + x^2 + 1) */
static const uint16_t crc16_table[256] = {
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
@ -145,6 +84,7 @@ static inline uint16_t crc16_byte(uint16_t cksum, const uint8_t byte)
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC32
// TODO try to replace with an algorithm
static const uint32_t crc32_table[] = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
@ -204,28 +144,41 @@ static inline uint32_t crc32_byte(uint32_t cksum, const uint8_t byte)
//endregion
void _TF_FN TF_Init(TF_Peer peer_bit)
/** Init with a user-allocated buffer */
void _TF_FN TF_InitStatic(TinyFrame *tf, TF_Peer peer_bit)
{
// Zero it out
memset(&tf, 0, sizeof(struct TinyFrameStruct));
if (tf == NULL) return;
tf.peer_bit = peer_bit;
// Zero it out, keeping user config
uint32_t usertag = tf->usertag;
void * userdata = tf->userdata;
memset(tf, 0, sizeof(struct TinyFrame_));
tf->usertag = usertag;
tf->userdata = userdata;
tf->peer_bit = peer_bit;
}
/** Init with malloc */
TinyFrame * _TF_FN TF_Init(TF_Peer peer_bit)
{
TinyFrame *tf = malloc(sizeof(TinyFrame));
TF_InitStatic(tf, peer_bit);
return tf;
}
//region Listeners
static void _TF_FN renew_id_listener(IdListener *lst)
/** Reset ID listener's timeout to the original value */
static inline void _TF_FN renew_id_listener(struct TF_IdListener_ *lst)
{
lst->timeout = lst->timeout_max;
}
/**
* Notify callback about ID listener demise & clean it
*
* @param lst - listener to clean
*/
static void _TF_FN cleanup_id_listener(TF_COUNT i, IdListener *lst)
/** Notify callback about ID listener's demise & let it free any resources in userdata */
static void _TF_FN cleanup_id_listener(TinyFrame *tf, TF_COUNT i, struct TF_IdListener_ *lst)
{
TF_Msg msg;
if (lst->fn == NULL) return;
@ -235,48 +188,41 @@ static void _TF_FN cleanup_id_listener(TF_COUNT i, IdListener *lst)
msg.userdata = lst->userdata;
msg.userdata2 = lst->userdata2;
msg.data = NULL; // this is a signal that the listener should clean up
lst->fn(&msg); // return value is ignored here - use TF_STAY or TF_CLOSE
lst->fn(tf, &msg); // return value is ignored here - use TF_STAY or TF_CLOSE
}
lst->fn = NULL; // Discard listener
if (i == tf.count_id_lst - 1) {
tf.count_id_lst--;
if (i == tf->count_id_lst - 1) {
tf->count_id_lst--;
}
}
/**
* Clean up Type listener
*
* @param lst - listener to clean
*/
static inline void _TF_FN cleanup_type_listener(TF_COUNT i, TypeListener *lst)
/** Clean up Type listener */
static inline void _TF_FN cleanup_type_listener(TinyFrame *tf, TF_COUNT i, struct TF_TypeListener_ *lst)
{
lst->fn = NULL; // Discard listener
if (i == tf.count_type_lst - 1) {
tf.count_type_lst--;
if (i == tf->count_type_lst - 1) {
tf->count_type_lst--;
}
}
/**
* Clean up Generic listener
*
* @param lst - listener to clean
*/
static inline void _TF_FN cleanup_generic_listener(TF_COUNT i, GenericListener *lst)
/** Clean up Generic listener */
static inline void _TF_FN cleanup_generic_listener(TinyFrame *tf, TF_COUNT i, struct TF_GenericListener_ *lst)
{
lst->fn = NULL; // Discard listener
if (i == tf.count_generic_lst - 1) {
tf.count_generic_lst--;
if (i == tf->count_generic_lst - 1) {
tf->count_generic_lst--;
}
}
bool _TF_FN TF_AddIdListener(TF_Msg *msg, TF_Listener cb, TF_TICKS timeout)
/** Add a new ID listener. Returns 1 on success. */
bool _TF_FN TF_AddIdListener(TinyFrame *tf, TF_Msg *msg, TF_Listener cb, TF_TICKS timeout)
{
TF_COUNT i;
IdListener *lst;
struct TF_IdListener_ *lst;
for (i = 0; i < TF_MAX_ID_LST; i++) {
lst = &tf.id_listeners[i];
lst = &tf->id_listeners[i];
// test for empty slot
if (lst->fn == NULL) {
lst->fn = cb;
@ -284,8 +230,8 @@ bool _TF_FN TF_AddIdListener(TF_Msg *msg, TF_Listener cb, TF_TICKS timeout)
lst->userdata = msg->userdata;
lst->userdata2 = msg->userdata2;
lst->timeout_max = lst->timeout = timeout;
if (i >= tf.count_id_lst) {
tf.count_id_lst = (TF_COUNT) (i + 1);
if (i >= tf->count_id_lst) {
tf->count_id_lst = (TF_COUNT) (i + 1);
}
return true;
}
@ -293,18 +239,19 @@ bool _TF_FN TF_AddIdListener(TF_Msg *msg, TF_Listener cb, TF_TICKS timeout)
return false;
}
bool _TF_FN TF_AddTypeListener(TF_TYPE frame_type, TF_Listener cb)
/** Add a new Type listener. Returns 1 on success. */
bool _TF_FN TF_AddTypeListener(TinyFrame *tf, TF_TYPE frame_type, TF_Listener cb)
{
TF_COUNT i;
TypeListener *lst;
struct TF_TypeListener_ *lst;
for (i = 0; i < TF_MAX_TYPE_LST; i++) {
lst = &tf.type_listeners[i];
lst = &tf->type_listeners[i];
// test for empty slot
if (lst->fn == NULL) {
lst->fn = cb;
lst->type = frame_type;
if (i >= tf.count_type_lst) {
tf.count_type_lst = (TF_COUNT) (i + 1);
if (i >= tf->count_type_lst) {
tf->count_type_lst = (TF_COUNT) (i + 1);
}
return true;
}
@ -312,17 +259,18 @@ bool _TF_FN TF_AddTypeListener(TF_TYPE frame_type, TF_Listener cb)
return false;
}
bool _TF_FN TF_AddGenericListener(TF_Listener cb)
/** Add a new Generic listener. Returns 1 on success. */
bool _TF_FN TF_AddGenericListener(TinyFrame *tf, TF_Listener cb)
{
TF_COUNT i;
GenericListener *lst;
struct TF_GenericListener_ *lst;
for (i = 0; i < TF_MAX_GEN_LST; i++) {
lst = &tf.generic_listeners[i];
lst = &tf->generic_listeners[i];
// test for empty slot
if (lst->fn == NULL) {
lst->fn = cb;
if (i >= tf.count_generic_lst) {
tf.count_generic_lst = (TF_COUNT) (i + 1);
if (i >= tf->count_generic_lst) {
tf->count_generic_lst = (TF_COUNT) (i + 1);
}
return true;
}
@ -330,45 +278,48 @@ bool _TF_FN TF_AddGenericListener(TF_Listener cb)
return false;
}
bool _TF_FN TF_RemoveIdListener(TF_ID frame_id)
/** Remove a ID listener by its frame ID. Returns 1 on success. */
bool _TF_FN TF_RemoveIdListener(TinyFrame *tf, TF_ID frame_id)
{
TF_COUNT i;
IdListener *lst;
for (i = 0; i < tf.count_id_lst; i++) {
lst = &tf.id_listeners[i];
struct TF_IdListener_ *lst;
for (i = 0; i < tf->count_id_lst; i++) {
lst = &tf->id_listeners[i];
// test if live & matching
if (lst->fn != NULL && lst->id == frame_id) {
cleanup_id_listener(i, lst);
cleanup_id_listener(tf, i, lst);
return true;
}
}
return false;
}
bool _TF_FN TF_RemoveTypeListener(TF_TYPE type)
/** Remove a type listener by its type. Returns 1 on success. */
bool _TF_FN TF_RemoveTypeListener(TinyFrame *tf, TF_TYPE type)
{
TF_COUNT i;
TypeListener *lst;
for (i = 0; i < tf.count_type_lst; i++) {
lst = &tf.type_listeners[i];
struct TF_TypeListener_ *lst;
for (i = 0; i < tf->count_type_lst; i++) {
lst = &tf->type_listeners[i];
// test if live & matching
if (lst->fn != NULL && lst->type == type) {
cleanup_type_listener(i, lst);
cleanup_type_listener(tf, i, lst);
return true;
}
}
return false;
}
bool _TF_FN TF_RemoveGenericListener(TF_Listener cb)
/** Remove a generic listener by its function pointer. Returns 1 on success. */
bool _TF_FN TF_RemoveGenericListener(TinyFrame *tf, TF_Listener cb)
{
TF_COUNT i;
GenericListener *lst;
for (i = 0; i < tf.count_generic_lst; i++) {
lst = &tf.generic_listeners[i];
struct TF_GenericListener_ *lst;
for (i = 0; i < tf->count_generic_lst; i++) {
lst = &tf->generic_listeners[i];
// test if live & matching
if (lst->fn == cb) {
cleanup_generic_listener(i, lst);
cleanup_generic_listener(tf, i, lst);
return true;
}
}
@ -376,80 +327,78 @@ bool _TF_FN TF_RemoveGenericListener(TF_Listener cb)
}
/** Handle a message that was just collected & verified by the parser */
static void _TF_FN TF_HandleReceivedMessage(void)
static void _TF_FN TF_HandleReceivedMessage(TinyFrame *tf)
{
TF_COUNT i;
IdListener *ilst;
TypeListener *tlst;
GenericListener *glst;
struct TF_IdListener_ *ilst;
struct TF_TypeListener_ *tlst;
struct TF_GenericListener_ *glst;
TF_Result res;
// Prepare message object
TF_Msg msg;
msg.frame_id = tf.id;
TF_ClearMsg(&msg);
msg.frame_id = tf->id;
msg.is_response = false;
msg.type = tf.type;
msg.data = tf.data;
msg.len = tf.len;
msg.type = tf->type;
msg.data = tf->data;
msg.len = tf->len;
//dumpFrameInfo(&msg);
// Any listener can consume the message (return true),
// or let someone else handle it.
// Any listener can consume the message, or let someone else handle it.
// The loop upper bounds are the highest currently used slot index
// (or close to it, depending on the order of listener removals)
// (or close to it, depending on the order of listener removals).
// ID listeners first
for (i = 0; i < tf.count_id_lst; i++) {
ilst = &tf.id_listeners[i];
for (i = 0; i < tf->count_id_lst; i++) {
ilst = &tf->id_listeners[i];
if (ilst->fn && ilst->id == msg.frame_id) {
msg.userdata = ilst->userdata; // pass userdata pointer to the callback
msg.userdata2 = ilst->userdata2;
res = ilst->fn(&msg);
res = ilst->fn(tf, &msg);
ilst->userdata = msg.userdata; // put it back (may have changed the pointer or set to NULL)
ilst->userdata2 = msg.userdata2; // put it back (may have changed the pointer or set to NULL)
if (res != TF_NEXT) {
if (res == TF_CLOSE) {
cleanup_id_listener(i, ilst);
}
else if (res == TF_RENEW) {
// if it's TF_CLOSE, we assume user already cleaned up userdata
if (res == TF_RENEW) {
renew_id_listener(ilst);
}
return;
}
}
}
// clean up for the following listeners that don't use userdata (this avoids data from
// an ID listener that returned TF_NEXT from leaking into Type and Generic listeners)
msg.userdata = NULL;
msg.userdata2 = NULL;
// clean up for the following listeners that don't use userdata
// Type listeners
for (i = 0; i < tf.count_type_lst; i++) {
tlst = &tf.type_listeners[i];
for (i = 0; i < tf->count_type_lst; i++) {
tlst = &tf->type_listeners[i];
if (tlst->fn && tlst->type == msg.type) {
res = tlst->fn(&msg);
res = tlst->fn(tf, &msg);
if (res != TF_NEXT) {
if (res == TF_CLOSE) {
cleanup_type_listener(i, tlst);
}
// if it's TF_CLOSE, we assume user already cleaned up userdata
// TF_RENEW doesn't make sense here because type listeners don't expire
return;
}
}
}
// Generic listeners
for (i = 0; i < tf.count_generic_lst; i++) {
glst = &tf.generic_listeners[i];
for (i = 0; i < tf->count_generic_lst; i++) {
glst = &tf->generic_listeners[i];
if (glst->fn) {
res = glst->fn(&msg);
res = glst->fn(tf, &msg);
if (res != TF_NEXT) {
if (res == TF_CLOSE) {
cleanup_generic_listener(i, glst);
}
// if it's TF_CLOSE, we assume user already cleaned up userdata
// TF_RENEW doesn't make sense here because generic listeners don't expire
return;
}
}
@ -458,173 +407,206 @@ static void _TF_FN TF_HandleReceivedMessage(void)
//endregion Listeners
void _TF_FN TF_Accept(const uint8_t *buffer, size_t count)
/** Handle a received byte buffer */
void _TF_FN TF_Accept(TinyFrame *tf, const uint8_t *buffer, size_t count)
{
size_t i;
for (i = 0; i < count; i++) {
TF_AcceptChar(buffer[i]);
TF_AcceptChar(tf, buffer[i]);
}
}
void _TF_FN TF_ResetParser(void)
/** Reset the parser's internal state. */
void _TF_FN TF_ResetParser(TinyFrame *tf)
{
tf.state = TFState_SOF;
tf->state = TFState_SOF;
// more init will be done by the parser when the first byte is received
}
/** SOF was received */
static void _TF_FN TF_ParsBeginFrame(void) {
/** SOF was received - prepare for the frame */
static void _TF_FN pars_begin_frame(TinyFrame *tf) {
// Reset state vars
CKSUM_RESET(tf.cksum);
CKSUM_RESET(tf->cksum);
#if TF_USE_SOF_BYTE
CKSUM_ADD(tf.cksum, TF_SOF_BYTE);
CKSUM_ADD(tf->cksum, TF_SOF_BYTE);
#endif
tf.discard_data = false;
tf->discard_data = false;
// Enter ID state
tf.state = TFState_ID;
tf.rxi = 0;
tf->state = TFState_ID;
tf->rxi = 0;
}
void _TF_FN TF_AcceptChar(unsigned char c)
/** Handle a received char - here's the main state machine */
void _TF_FN TF_AcceptChar(TinyFrame *tf, unsigned char c)
{
// Parser timeout - clear
if (tf.parser_timeout_ticks >= TF_PARSER_TIMEOUT_TICKS) {
TF_ResetParser();
if (tf->parser_timeout_ticks >= TF_PARSER_TIMEOUT_TICKS) {
TF_ResetParser(tf);
}
tf.parser_timeout_ticks = 0;
tf->parser_timeout_ticks = 0;
// DRY snippet - collect multi-byte number from the input stream
// DRY snippet - collect multi-byte number from the input stream, byte by byte
// This is a little dirty, but makes the code easier to read. It's used like e.g. if(),
// the body is run only after the entire number (of data type 'type') was received
// and stored to 'dest'
#define COLLECT_NUMBER(dest, type) dest = (type)(((dest) << 8) | c); \
if (++tf.rxi == sizeof(type))
if (++tf->rxi == sizeof(type))
#if !TF_USE_SOF_BYTE
if (tf.state == TFState_SOF) {
if (tf->state == TFState_SOF) {
TF_ParsBeginFrame();
}
#endif
switch (tf.state) {
switch (tf->state) {
case TFState_SOF:
if (c == TF_SOF_BYTE) {
TF_ParsBeginFrame();
pars_begin_frame(tf);
}
break;
case TFState_ID:
CKSUM_ADD(tf.cksum, c);
COLLECT_NUMBER(tf.id, TF_ID) {
CKSUM_ADD(tf->cksum, c);
COLLECT_NUMBER(tf->id, TF_ID) {
// Enter LEN state
tf.state = TFState_LEN;
tf.rxi = 0;
tf->state = TFState_LEN;
tf->rxi = 0;
}
break;
case TFState_LEN:
CKSUM_ADD(tf.cksum, c);
COLLECT_NUMBER(tf.len, TF_LEN) {
CKSUM_ADD(tf->cksum, c);
COLLECT_NUMBER(tf->len, TF_LEN) {
// Enter TYPE state
tf.state = TFState_TYPE;
tf.rxi = 0;
tf->state = TFState_TYPE;
tf->rxi = 0;
}
break;
case TFState_TYPE:
CKSUM_ADD(tf.cksum, c);
COLLECT_NUMBER(tf.type, TF_TYPE) {
CKSUM_ADD(tf->cksum, c);
COLLECT_NUMBER(tf->type, TF_TYPE) {
#if TF_CKSUM_TYPE == TF_CKSUM_NONE
tf.state = TFState_DATA;
tf.rxi = 0;
tf->state = TFState_DATA;
tf->rxi = 0;
#else
// enter HEAD_CKSUM state
tf.state = TFState_HEAD_CKSUM;
tf.rxi = 0;
tf.ref_cksum = 0;
tf->state = TFState_HEAD_CKSUM;
tf->rxi = 0;
tf->ref_cksum = 0;
#endif
}
break;
case TFState_HEAD_CKSUM:
COLLECT_NUMBER(tf.ref_cksum, TF_CKSUM) {
COLLECT_NUMBER(tf->ref_cksum, TF_CKSUM) {
// Check the header checksum against the computed value
CKSUM_FINALIZE(tf.cksum);
CKSUM_FINALIZE(tf->cksum);
if (tf.cksum != tf.ref_cksum) {
TF_ResetParser();
if (tf->cksum != tf->ref_cksum) {
TF_ResetParser(tf);
break;
}
if (tf.len == 0) {
TF_HandleReceivedMessage();
TF_ResetParser();
if (tf->len == 0) {
TF_HandleReceivedMessage(tf);
TF_ResetParser(tf);
break;
}
// Enter DATA state
tf.state = TFState_DATA;
tf.rxi = 0;
tf->state = TFState_DATA;
tf->rxi = 0;
CKSUM_RESET(tf.cksum); // Start collecting the payload
CKSUM_RESET(tf->cksum); // Start collecting the payload
if (tf.len >= TF_MAX_PAYLOAD_RX) {
if (tf->len >= TF_MAX_PAYLOAD_RX) {
// ERROR - frame too long. Consume, but do not store.
tf.discard_data = true;
tf->discard_data = true;
}
}
break;
case TFState_DATA:
if (tf.discard_data) {
tf.rxi++;
if (tf->discard_data) {
tf->rxi++;
} else {
CKSUM_ADD(tf.cksum, c);
tf.data[tf.rxi++] = c;
CKSUM_ADD(tf->cksum, c);
tf->data[tf->rxi++] = c;
}
if (tf.rxi == tf.len) {
if (tf->rxi == tf->len) {
#if TF_CKSUM_TYPE == TF_CKSUM_NONE
// All done
TF_HandleReceivedMessage();
TF_ResetParser();
#else
// Enter DATA_CKSUM state
tf.state = TFState_DATA_CKSUM;
tf.rxi = 0;
tf.ref_cksum = 0;
tf->state = TFState_DATA_CKSUM;
tf->rxi = 0;
tf->ref_cksum = 0;
#endif
}
break;
case TFState_DATA_CKSUM:
COLLECT_NUMBER(tf.ref_cksum, TF_CKSUM) {
COLLECT_NUMBER(tf->ref_cksum, TF_CKSUM) {
// Check the header checksum against the computed value
CKSUM_FINALIZE(tf.cksum);
if (!tf.discard_data && tf.cksum == tf.ref_cksum) {
TF_HandleReceivedMessage();
CKSUM_FINALIZE(tf->cksum);
if (!tf->discard_data && tf->cksum == tf->ref_cksum) {
TF_HandleReceivedMessage(tf);
}
TF_ResetParser();
TF_ResetParser(tf);
}
break;
}
// we get here after finishing HEAD, if no data are to be received - handle and clear
if (tf.len == 0 && tf.state == TFState_DATA) {
TF_HandleReceivedMessage();
TF_ResetParser();
if (tf->len == 0 && tf->state == TFState_DATA) {
TF_HandleReceivedMessage(tf);
TF_ResetParser(tf);
}
}
// Helper macros for the Compose functions
// use variables: si - signed int, b - byte, outbuf - target buffer, pos - count of bytes in buffer
// use variables: si - signed int, b - byte, outbuff - target buffer, pos - count of bytes in buffer
/**
* Write a number to the output buffer.
*
* @param type - data type
* @param num - number to write
* @param xtra - extra callback run after each byte, 'b' now contains the byte.
*/
#define WRITENUM_BASE(type, num, xtra) \
for (si = sizeof(type)-1; si>=0; si--) { \
b = (uint8_t)((num) >> (si*8) & 0xFF); \
outbuff[pos++] = b; \
xtra; \
}
/**
* Do nothing
*/
#define _NOOP()
/**
* Write a number without adding its bytes to the checksum
*
* @param type - data type
* @param num - number to write
*/
#define WRITENUM(type, num) WRITENUM_BASE(type, num, _NOOP())
/**
* Write a number AND add its bytes to the checksum
*
* @param type - data type
* @param num - number to write
*/
#define WRITENUM_CKSUM(type, num) WRITENUM_BASE(type, num, CKSUM_ADD(cksum, b))
/**
@ -632,16 +614,10 @@ void _TF_FN TF_AcceptChar(unsigned char c)
* The frame can be sent using TF_WriteImpl(), or received by TF_Accept()
*
* @param outbuff - buffer to store the result in
* @param msgid - message ID is stored here, if not NULL
* @param type - message type
* @param len - payload size in bytes
* @param explicit_id - ID to use in the frame (8-bit)
* @param use_expl_id - whether to use the previous param
* @param msg - message written to the buffer
* @return nr of bytes in outbuff used by the frame, 0 on failure
*/
static inline size_t _TF_FN TF_ComposeHead(uint8_t *outbuff, TF_ID *id_ptr,
TF_TYPE type, TF_LEN data_len,
TF_ID explicit_id, bool use_expl_id)
static inline size_t _TF_FN TF_ComposeHead(TinyFrame *tf, uint8_t *outbuff, TF_Msg *msg)
{
int8_t si = 0; // signed small int
uint8_t b = 0;
@ -654,17 +630,17 @@ static inline size_t _TF_FN TF_ComposeHead(uint8_t *outbuff, TF_ID *id_ptr,
CKSUM_RESET(cksum);
// Gen ID
if (use_expl_id) {
id = explicit_id;
if (msg->is_response) {
id = msg->frame_id;
}
else {
id = (TF_ID) (tf.next_id++ & TF_ID_MASK);
if (tf.peer_bit) {
id = (TF_ID) (tf->next_id++ & TF_ID_MASK);
if (tf->peer_bit) {
id |= TF_ID_PEERBIT;
}
}
if (id_ptr != NULL) *id_ptr = id;
msg->frame_id = id; // put the resolved ID into the message object for later use
// --- Start ---
CKSUM_RESET(cksum);
@ -675,8 +651,8 @@ static inline size_t _TF_FN TF_ComposeHead(uint8_t *outbuff, TF_ID *id_ptr,
#endif
WRITENUM_CKSUM(TF_ID, id);
WRITENUM_CKSUM(TF_LEN, data_len);
WRITENUM_CKSUM(TF_TYPE, type);
WRITENUM_CKSUM(TF_LEN, msg->len);
WRITENUM_CKSUM(TF_TYPE, msg->type);
#if TF_CKSUM_TYPE != TF_CKSUM_NONE
CKSUM_FINALIZE(cksum);
@ -696,7 +672,9 @@ static inline size_t _TF_FN TF_ComposeHead(uint8_t *outbuff, TF_ID *id_ptr,
* @param cksum - checksum variable, used for all calls to TF_ComposeBody. Must be reset before first use! (CKSUM_RESET(cksum);)
* @return nr of bytes in outbuff used
*/
static size_t _TF_FN TF_ComposeBody(uint8_t *outbuff, const uint8_t *data, TF_LEN data_len, TF_CKSUM *cksum)
static size_t _TF_FN TF_ComposeBody(uint8_t *outbuff,
const uint8_t *data, TF_LEN data_len,
TF_CKSUM *cksum)
{
TF_LEN i = 0;
uint8_t b = 0;
@ -718,7 +696,7 @@ static size_t _TF_FN TF_ComposeBody(uint8_t *outbuff, const uint8_t *data, TF_LE
* @param cksum - checksum variable used for the body
* @return nr of bytes in outbuff used
*/
static size_t _TF_FN TF_ComposeTail(uint8_t *outbuff, TF_CKSUM *cksum)
static size_t _TF_FN TF_ComposeTail(uint8_t *outbuff, const TF_CKSUM *cksum)
{
int8_t si = 0; // signed small int
uint8_t b = 0;
@ -731,104 +709,106 @@ static size_t _TF_FN TF_ComposeTail(uint8_t *outbuff, TF_CKSUM *cksum)
return pos;
}
// send with listener
static bool _TF_FN TF_SendFrame(TF_Msg *msg, TF_Listener listener, TF_TICKS timeout)
/**
* Send a message
*
* @param tf - instance
* @param msg - message object
* @param listener - ID listener, or NULL
* @param timeout - listener timeout, 0 is none
* @return true if sent
*/
static bool _TF_FN TF_SendFrame(TinyFrame *tf, TF_Msg *msg, TF_Listener listener, TF_TICKS timeout)
{
size_t len = 0;
size_t remain = 0;
size_t sent = 0;
TF_CKSUM cksum = 0;
TF_ClaimTx();
TF_ClaimTx(tf);
len = TF_ComposeHead(tf.sendbuf,
&msg->frame_id,
msg->type,
msg->len,
msg->frame_id,
msg->is_response);
if (listener) TF_AddIdListener(msg, listener, timeout);
len = TF_ComposeHead(tf, tf->sendbuf, msg);
if (listener) TF_AddIdListener(tf, msg, listener, timeout);
CKSUM_RESET(cksum);
remain = msg->len;
while (remain > 0) {
size_t chunk = TF_MIN(TF_SENDBUF_LEN - len, remain);
len += TF_ComposeBody(tf.sendbuf+len, msg->data+sent, (TF_LEN) chunk, &cksum);
len += TF_ComposeBody(tf->sendbuf+len, msg->data+sent, (TF_LEN) chunk, &cksum);
remain -= chunk;
sent += chunk;
// Flush if the buffer is full and we have more to send
if (remain > 0 && len == TF_SENDBUF_LEN) {
TF_WriteImpl((const uint8_t *) tf.sendbuf, len);
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
len = 0;
}
}
// Flush if checksum wouldn't fit in the buffer
if (TF_SENDBUF_LEN - len < sizeof(TF_CKSUM)) {
TF_WriteImpl((const uint8_t *) tf.sendbuf, len);
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
len = 0;
}
// Add checksum, flush what remains to be sent
len += TF_ComposeTail(tf.sendbuf+len, &cksum);
TF_WriteImpl((const uint8_t *) tf.sendbuf, len);
len += TF_ComposeTail(tf->sendbuf+len, &cksum);
TF_WriteImpl(tf, (const uint8_t *) tf->sendbuf, len);
TF_ReleaseTx();
TF_ReleaseTx(tf);
return true;
}
// send without listener
bool _TF_FN TF_Send(TF_Msg *msg)
/** send without listener */
bool _TF_FN TF_Send(TinyFrame *tf, TF_Msg *msg)
{
return TF_SendFrame(msg, NULL, 0);
return TF_SendFrame(tf, msg, NULL, 0);
}
// send without listener and struct
bool _TF_FN TF_SendSimple(TF_TYPE type, const uint8_t *data, TF_LEN len)
/** send without listener and struct */
bool _TF_FN TF_SendSimple(TinyFrame *tf, TF_TYPE type, const uint8_t *data, TF_LEN len)
{
TF_Msg msg;
TF_ClearMsg(&msg);
msg.type = type;
msg.data = data;
msg.len = len;
return TF_Send(&msg);
return TF_Send(tf, &msg);
}
// send without listener and struct
bool _TF_FN TF_QuerySimple(TF_TYPE type, const uint8_t *data, TF_LEN len, TF_Listener listener, TF_TICKS timeout, void *userdata)
/** send with a listener waiting for a reply, without the struct */
bool _TF_FN TF_QuerySimple(TinyFrame *tf, TF_TYPE type, const uint8_t *data, TF_LEN len, TF_Listener listener, TF_TICKS timeout)
{
TF_Msg msg;
TF_ClearMsg(&msg);
msg.type = type;
msg.data = data;
msg.len = len;
msg.userdata = userdata;
return TF_SendFrame(&msg, listener, timeout);
return TF_SendFrame(tf, &msg, listener, timeout);
}
// send with listener
bool _TF_FN TF_Query(TF_Msg *msg, TF_Listener listener, TF_TICKS timeout)
/** send with a listener waiting for a reply */
bool _TF_FN TF_Query(TinyFrame *tf, TF_Msg *msg, TF_Listener listener, TF_TICKS timeout)
{
return TF_SendFrame(msg, listener, timeout);
return TF_SendFrame(tf, msg, listener, timeout);
}
// Like TF_Send, but with explicit frame ID
bool _TF_FN TF_Respond(TF_Msg *msg)
/** Like TF_Send, but with explicit frame ID (set inside the msg object), use for responses */
bool _TF_FN TF_Respond(TinyFrame *tf, TF_Msg *msg)
{
msg->is_response = true;
return TF_Send(msg);
return TF_Send(tf, msg);
}
bool _TF_FN TF_RenewIdListener(TF_ID id)
/** Externally renew an ID listener */
bool _TF_FN TF_RenewIdListener(TinyFrame *tf, TF_ID id)
{
TF_COUNT i;
IdListener *lst;
for (i = 0; i < tf.count_id_lst; i++) {
lst = &tf.id_listeners[i];
struct TF_IdListener_ *lst;
for (i = 0; i < tf->count_id_lst; i++) {
lst = &tf->id_listeners[i];
// test if live & matching
if (lst->fn != NULL && lst->id == id) {
renew_id_listener(lst);
@ -839,34 +819,40 @@ bool _TF_FN TF_RenewIdListener(TF_ID id)
}
/** Timebase hook - for timeouts */
void _TF_FN TF_Tick(void)
void _TF_FN TF_Tick(TinyFrame *tf)
{
TF_COUNT i = 0;
IdListener *lst;
struct TF_IdListener_ *lst;
// increment parser timeout (timeout is handled when receiving next byte)
if (tf.parser_timeout_ticks < TF_PARSER_TIMEOUT_TICKS) {
tf.parser_timeout_ticks++;
if (tf->parser_timeout_ticks < TF_PARSER_TIMEOUT_TICKS) {
tf->parser_timeout_ticks++;
}
// decrement and expire ID listeners
for (i = 0; i < tf.count_id_lst; i++) {
lst = &tf.id_listeners[i];
for (i = 0; i < tf->count_id_lst; i++) {
lst = &tf->id_listeners[i];
if (!lst->fn || lst->timeout == 0) continue;
// count down...
if (--lst->timeout == 0) {
// Listener has expired
cleanup_id_listener(i, lst);
cleanup_id_listener(tf, i, lst);
}
}
}
void __attribute__((weak)) TF_ClaimTx(void)
/** Default impl for claiming write mutex; can be specific to the instance */
void __attribute__((weak)) TF_ClaimTx(TinyFrame *tf)
{
(void) tf;
// do nothing
}
void __attribute__((weak)) TF_ReleaseTx(void)
/** Default impl for releasing write mutex; can be specific to the instance */
void __attribute__((weak)) TF_ReleaseTx(TinyFrame *tf)
{
(void) tf;
// do nothing
}

185
gex/protocol/TinyFrame.h
Unescape View File

@ -10,12 +10,13 @@
* Upstream URL: https://github.com/MightyPork/TinyFrame
*/
#define TF_VERSION "1.2.0"
#define TF_VERSION "2.0.0"
//---------------------------------------------------------------------------
#include <stdint.h> // for uint8_t etc
#include <stdbool.h> // for bool
#include <stdlib.h> // for NULL
#include <stddef.h> // for NULL
#include <string.h> // for memset()
//---------------------------------------------------------------------------
// Select checksum type (0 = none, 8 = ~XOR, 16 = CRC16 0x8005, 32 = CRC32)
@ -24,7 +25,7 @@
#define TF_CKSUM_CRC16 16
#define TF_CKSUM_CRC32 32
#include <TF_Config.h>
#include "TF_Config.h"
//region Resolve data types
@ -87,9 +88,10 @@
/** Peer bit enum (used for init) */
typedef enum {
TF_SLAVE = 0,
TF_MASTER,
TF_MASTER = 1,
} TF_Peer;
/** Response from listeners */
typedef enum {
TF_NEXT = 0, //!< Not handled, let other listeners handle it
TF_STAY = 1, //!< Handled, stay
@ -113,15 +115,11 @@ typedef struct _TF_MSG_STRUCT_ {
*/
static inline void TF_ClearMsg(TF_Msg *msg)
{
msg->frame_id = 0;
msg->is_response = false;
msg->type = 0;
msg->data = NULL;
msg->len = 0;
msg->userdata = NULL;
msg->userdata2 = NULL;
memset(msg, 0, sizeof(TF_Msg));
}
typedef struct TinyFrame_ TinyFrame;
/**
* TinyFrame Type Listener callback
*
@ -131,21 +129,117 @@ static inline void TF_ClearMsg(TF_Msg *msg)
* @param len - number of bytes in the buffer
* @return listener result
*/
typedef TF_Result (*TF_Listener)(TF_Msg *msg);
typedef TF_Result (*TF_Listener)(TinyFrame *tf, TF_Msg *msg);
// -------------------------------------------------------------------
// region Internal
enum TFState_ {
TFState_SOF = 0, //!< Wait for SOF
TFState_LEN, //!< Wait for Number Of Bytes
TFState_HEAD_CKSUM, //!< Wait for header Checksum
TFState_ID, //!< Wait for ID
TFState_TYPE, //!< Wait for message type
TFState_DATA, //!< Receive payload
TFState_DATA_CKSUM //!< Wait for Checksum
};
struct TF_IdListener_ {
TF_ID id;
TF_Listener fn;
TF_TICKS timeout; // nr of ticks remaining to disable this listener
TF_TICKS timeout_max; // the original timeout is stored here
void *userdata;
void *userdata2;
};
struct TF_TypeListener_ {
TF_TYPE type;
TF_Listener fn;
};
struct TF_GenericListener_ {
TF_Listener fn;
};
/**
* Frame parser internal state.
*/
struct TinyFrame_ {
/* Public user data */
void *userdata;
uint32_t usertag;
// --- the rest of the struct is internal, do not access directly ---
/* Own state */
TF_Peer peer_bit; //!< Own peer bit (unqiue to avoid msg ID clash)
TF_ID next_id; //!< Next frame / frame chain ID
/* Parser state */
enum TFState_ state;
TF_TICKS parser_timeout_ticks;
TF_ID id; //!< Incoming packet ID
TF_LEN len; //!< Payload length
uint8_t data[TF_MAX_PAYLOAD_RX]; //!< Data byte buffer
TF_LEN rxi; //!< Field size byte counter
TF_CKSUM cksum; //!< Checksum calculated of the data stream
TF_CKSUM ref_cksum; //!< Reference checksum read from the message
TF_TYPE type; //!< Collected message type number
bool discard_data; //!< Set if (len > TF_MAX_PAYLOAD) to read the frame, but ignore the data.
/* --- Callbacks --- */
/* Transaction callbacks */
struct TF_IdListener_ id_listeners[TF_MAX_ID_LST];
struct TF_TypeListener_ type_listeners[TF_MAX_TYPE_LST];
struct TF_GenericListener_ generic_listeners[TF_MAX_GEN_LST];
// Those counters are used to optimize look-up times.
// They point to the highest used slot number,
// or close to it, depending on the removal order.
TF_COUNT count_id_lst;
TF_COUNT count_type_lst;
TF_COUNT count_generic_lst;
// Buffer for building frames
uint8_t sendbuf[TF_SENDBUF_LEN];
};
// endregion
// -------------------------------------------------------------------
/**
* Initialize the TinyFrame engine.
* This can also be used to completely reset it (removing all listeners etc)
* This can also be used to completely reset it (removing all listeners etc).
*
* The field .userdata (or .usertag) can be used to identify different instances
* in the TF_WriteImpl() function etc. Set this field after the init.
*
* This function is a wrapper around TF_InitStatic that calls malloc() to obtain
* the instance.
*
* @param peer_bit - peer bit to use for self
*/
TinyFrame *TF_Init(TF_Peer peer_bit);
/**
* Initialize the TinyFrame engine using a statically allocated instance struct.
*
* The .userdata / .usertag field is preserved when TF_InitStatic is called.
*
* @param peer_bit - peer bit to use for self
*/
void TF_Init(TF_Peer peer_bit);
void TF_InitStatic(TinyFrame *tf, TF_Peer peer_bit);
/**
* Reset the frame parser state machine.
* This does not affect registered listeners.
*/
void TF_ResetParser(void);
void TF_ResetParser(TinyFrame *tf);
/**
* Register a frame type listener.
@ -155,14 +249,14 @@ void TF_ResetParser(void);
* @param timeout - timeout in ticks to auto-remove the listener (0 = keep forever)
* @return slot index (for removing), or TF_ERROR (-1)
*/
bool TF_AddIdListener(TF_Msg *msg, TF_Listener cb, TF_TICKS timeout);
bool TF_AddIdListener(TinyFrame *tf, TF_Msg *msg, TF_Listener cb, TF_TICKS timeout);
/**
* Remove a listener by the message ID it's registered for
*
* @param frame_id - the frame we're listening for
*/
bool TF_RemoveIdListener(TF_ID frame_id);
bool TF_RemoveIdListener(TinyFrame *tf, TF_ID frame_id);
/**
* Register a frame type listener.
@ -171,14 +265,14 @@ bool TF_RemoveIdListener(TF_ID frame_id);
* @param cb - callback
* @return slot index (for removing), or TF_ERROR (-1)
*/
bool TF_AddTypeListener(TF_TYPE frame_type, TF_Listener cb);
bool TF_AddTypeListener(TinyFrame *tf, TF_TYPE frame_type, TF_Listener cb);
/**
* Remove a listener by type.
*
* @param type - the type it's registered for
*/
bool TF_RemoveTypeListener(TF_TYPE type);
bool TF_RemoveTypeListener(TinyFrame *tf, TF_TYPE type);
/**
* Register a generic listener.
@ -186,14 +280,14 @@ bool TF_RemoveTypeListener(TF_TYPE type);
* @param cb - callback
* @return slot index (for removing), or TF_ERROR (-1)
*/
bool TF_AddGenericListener(TF_Listener cb);
bool TF_AddGenericListener(TinyFrame *tf, TF_Listener cb);
/**
* Remove a generic listener by function pointer
*
* @param cb - callback function to remove
*/
bool TF_RemoveGenericListener(TF_Listener cb);
bool TF_RemoveGenericListener(TinyFrame *tf, TF_Listener cb);
/**
* Send a frame, no listener
@ -201,17 +295,12 @@ bool TF_RemoveGenericListener(TF_Listener cb);
* @param msg - message struct. ID is stored in the frame_id field
* @return success
*/
bool TF_Send(TF_Msg *msg);
bool TF_Send(TinyFrame *tf, TF_Msg *msg);
/**
* Like TF_Send, but without the struct
*/
bool TF_SendSimple(TF_TYPE type, const uint8_t *data, TF_LEN len);
/**
* Like TF_Query, but without the struct
*/
bool TF_QuerySimple(TF_TYPE type, const uint8_t *data, TF_LEN len, TF_Listener listener, TF_TICKS timeout, void *userdata);
bool TF_SendSimple(TinyFrame *tf, TF_TYPE type, const uint8_t *data, TF_LEN len);
/**
* Send a frame, and optionally attach an ID listener.
@ -221,7 +310,13 @@ bool TF_QuerySimple(TF_TYPE type, const uint8_t *data, TF_LEN len, TF_Listener l
* @param timeout - listener expiry time in ticks
* @return success
*/
bool TF_Query(TF_Msg *msg, TF_Listener listener, TF_TICKS timeout);
bool TF_Query(TinyFrame *tf, TF_Msg *msg, TF_Listener listener, TF_TICKS timeout);
/**
* Like TF_Query, but without the struct
*/
bool TF_QuerySimple(TinyFrame *tf, TF_TYPE type, const uint8_t *data, TF_LEN len,
TF_Listener listener, TF_TICKS timeout);
/**
* Send a response to a received message.
@ -229,15 +324,15 @@ bool TF_Query(TF_Msg *msg, TF_Listener listener, TF_TICKS timeout);
* @param msg - message struct. ID is read from frame_id. set ->renew to reset listener timeout
* @return success
*/
bool TF_Respond(TF_Msg *msg);
bool TF_Respond(TinyFrame *tf, TF_Msg *msg);
/**
* Renew ID listener timeout
* Renew an ID listener timeout externally (as opposed to by returning TF_RENEW from the ID listener)
*
* @param id - listener ID to renew
* @return true if listener was found and renewed
*/
bool TF_RenewIdListener(TF_ID id);
bool TF_RenewIdListener(TinyFrame *tf, TF_ID id);
/**
* Accept incoming bytes & parse frames
@ -245,21 +340,14 @@ bool TF_RenewIdListener(TF_ID id);
* @param buffer - byte buffer to process
* @param count - nr of bytes in the buffer
*/
void TF_Accept(const uint8_t *buffer, size_t count);
void TF_Accept(TinyFrame *tf, const uint8_t *buffer, size_t count);
/**
* Accept a single incoming byte
*
* @param c - a received char
*/
void TF_AcceptChar(uint8_t c);
/**
* 'Write bytes' function that sends data to UART
*
* ! Implement this in your application code !
*/
extern void TF_WriteImpl(const uint8_t *buff, size_t len);
void TF_AcceptChar(TinyFrame *tf, uint8_t c);
/**
* This function should be called periodically.
@ -269,12 +357,21 @@ extern void TF_WriteImpl(const uint8_t *buff, size_t len);
*
* (suggestion - call this in a SysTick handler)
*/
void TF_Tick(void);
void TF_Tick(TinyFrame *tf);
// --- TO BE IMPLEMENTED BY USER ---
/**
* 'Write bytes' function that sends data to UART
*
* ! Implement this in your application code !
*/
extern void TF_WriteImpl(TinyFrame *tf, const uint8_t *buff, size_t len);
/** Claim the TX interface before composing and sending a frame */
extern void TF_ClaimTx(void);
extern void TF_ClaimTx(TinyFrame *tf);
/** Free the TX interface after composing and sending a frame */
extern void TF_ReleaseTx(void);
extern void TF_ReleaseTx(TinyFrame *tf);
#endif

0
gex/hexdump.c → gex/utils/hexdump.c
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gex/hexdump.h → gex/utils/hexdump.h
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gex/protocol/payload_builder.c → gex/utils/payload_builder.c
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gex/protocol/payload_builder.h → gex/utils/payload_builder.h
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gex/protocol/payload_parser.c → gex/utils/payload_parser.c
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