add client

hdlc/client.c

@@ -0,0 +1,113 @@
+#include "client.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+void init_Client(Client* client, bool test_is_valid, uint8_t address, void* serial_port) {
+    client->TEST_IS_VALID = test_is_valid;
+    client->address = address;
+    client->_send_sequence_number = 0;
+    client->poll_final = 1;
+    client->_receive_sequence_number = 0;
+    client->serial_port = serial_port;
+}
+
+
+void connect(Client* client) {
+    UFrame u_frame;
+    init_UFrame(&u_frame, client->address, client->poll_final, "BP", NULL, 0);
+
+    uint8_t result[256];
+    create_frame(&u_frame.base, result);
+
+    void* serial_port = client->serial_port;
+    // Write result to serial port to establish connection
+    // ...
+
+    // Wait for acknowledgment frame
+    // Read bytes from serial port
+    // ...
+
+    uint8_t received[256]; // Example buffer size, adjust as needed
+    size_t received_length = 0;
+
+    // Process received bytes
+    // ...
+
+    // Validate acknowledgment frame
+    HDLCFrame frame;
+    init_HDLCFrame(&frame, 0, 0, received + 3, received_length - 6);
+    if (validate(client, &frame, received, received_length)) {
+        // Connection established
+    } else {
+        // Connection failed
+    }
+}
+
+void send(Client* client, uint8_t* data, size_t data_length) {
+    connect(client);
+
+    IFrame i_frame;
+    init_IFrame(&i_frame, client->address, client->_receive_sequence_number, client->poll_final, client->_send_sequence_number, data, data_length);
+
+    uint8_t result[256];
+    create_frame(&i_frame.base, result);
+
+    void* serial_port = client->serial_port;
+    sendSerialData(client->serial_port, &i_frame.base.data, i_frame.base.data_length);
+
+    client->_send_sequence_number++;
+}
+
+void receive_data(Client* client) {
+    void* serial_port = client->serial_port;
+    // Read data from serial port
+    // ...
+
+    // Process received data
+    // ...
+}
+
+bool validate(Client* client, HDLCFrame* frame, uint8_t* received_data, size_t received_length) {
+    uint8_t control = received_data[2];
+    if ((control & 0x01) == 0) {
+        // I-frame
+        printf("i frame\n");
+        uint8_t send_sequence_number = (control >> 1) & 0x07;
+        uint16_t crc = (received_data[received_length - 2] << 8) | received_data[received_length - 3];
+        uint16_t calculated_crc = calculate_fcs(received_data + 1, received_length - 4);
+        if (crc == calculated_crc && send_sequence_number == client->_receive_sequence_number && client->TEST_IS_VALID) {
+            client->_receive_sequence_number++;
+            return true;
+        }
+    } else if ((control & 0x03) == 1) {
+        // S-frame
+        printf("s frame\n");
+        // Handle S-frame
+    } else {
+        // U-frame
+        printf("u frame\n");
+        // Handle U-frame
+    }
+    return false;
+}
+
+int sendSerialData(const char* port, const char* data, size_t length) {
+    int serial_port = open(port, O_RDWR); // Replace "port" with your serial port device
+
+    if (serial_port < 0) {
+        perror("Error opening the serial port");
+        return -1;
+    }
+
+    ssize_t bytes_written = write(serial_port, data, length);
+
+    if (bytes_written < 0) {
+        perror("Error writing to the serial port");
+        return -1;
+    }
+
+    close(serial_port);
+    return bytes_written;
+}

hdlc/client.h

@@ -0,0 +1,29 @@
+//
+// Created by 79513 on 19.06.2023.
+//
+
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include "hdlc_frame.h"
+#include <stdbool.h>
+#include <stddef.h> // Для использования size_t
+#include <stdint.h>
+
+typedef struct {
+    bool TEST_IS_VALID;
+    uint8_t address;
+    uint8_t _send_sequence_number;
+    uint8_t poll_final;
+    uint8_t _receive_sequence_number;
+    void* serial_port; // Указатель на объект последовательного порта
+} Client;
+
+void init_Client(Client* client, bool test_is_valid, uint8_t address, void* serial_port);
+void connect(Client* client);
+void send(Client* client, uint8_t* data, size_t data_length);
+void receive_data(Client* client);
+bool validate(Client* client, HDLCFrame* frame, uint8_t* received_data, size_t received_length);
+int sendSerialData(const char* port, const char* data, size_t length);
+
+#endif

hdlc/hdlc_frame.c

@@ -1,26 +1,26 @@
 #include "hdlc_frame.h"
 
+#include <string.h>
+
 #define START_FLAG 0x7E
 #define END_FLAG 0x7E
 #define ESCAPE_FLAG 0x7D
 #define ESCAPE_XOR 0x20
 
-void initialize_frame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length) {
+void init_HDLCFrame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length) {
     frame->address = address;
     frame->control = control;
     frame->data = data;
     frame->data_length = data_length;
 }
 
-uint16_t calculate_fcs(HDLCFrame* frame) {
+uint16_t calculate_fcs(const HDLCFrame *frame, size_t i) {
     uint16_t fcs = 0xFFFF;
-    uint8_t data_bytes[MAX_FRAME_LENGTH];
+
+    uint8_t data_bytes[2 + frame->data_length];
     data_bytes[0] = frame->address;
     data_bytes[1] = frame->control;
-
-    for (size_t i = 0; i < frame->data_length; i++) {
-        data_bytes[i + 2] = frame->data[i];
-    }
+    memcpy(data_bytes + 2, frame->data, frame->data_length);
 
     for (size_t i = 0; i < frame->data_length + 2; i++) {
         uint8_t byte = data_bytes[i];
@@ -31,47 +31,78 @@ uint16_t calculate_fcs(HDLCFrame* frame) {
     return fcs;
 }
 
-void create_frame(HDLCFrame* frame, uint8_t* frame_data, size_t* frame_length) {
+void create_frame(const HDLCFrame* frame, uint8_t* result) {
     size_t index = 0;
-    frame_data[index++] = START_FLAG;
-    frame_data[index++] = frame->address;
-    frame_data[index++] = frame->control;
 
-    for (size_t i = 0; i < frame->data_length; i++) {
-        uint8_t byte = frame->data[i];
-        if (byte == START_FLAG || byte == END_FLAG || byte == ESCAPE_FLAG) {
-            frame_data[index++] = ESCAPE_FLAG;
-            frame_data[index++] = byte ^ ESCAPE_XOR;
-        } else {
-            frame_data[index++] = byte;
+    result[index++] = START_FLAG;
+    result[index++] = frame->address;
+    result[index++] = frame->control;
+
+    if (frame->data != NULL) {
+        for (size_t i = 0; i < frame->data_length; i++) {
+            uint8_t byte = frame->data[i];
+            if (byte == START_FLAG || byte == END_FLAG || byte == ESCAPE_FLAG) {
+                result[index++] = ESCAPE_FLAG;
+                result[index++] = byte ^ ESCAPE_XOR;
+            } else {
+                result[index++] = byte;
+            }
         }
     }
 
-    uint16_t fcs = calculate_fcs(frame);
-    frame_data[index++] = fcs & 0xFF;
-    frame_data[index++] = (fcs >> 8) & 0xFF;
-    frame_data[index] = END_FLAG;
-
-    *frame_length = index + 1;
+    uint16_t fcs = calculate_fcs(frame, 0);
+    result[index++] = fcs & 0xFF;
+    result[index++] = (fcs >> 8) & 0xFF;
+    result[index++] = END_FLAG;
 }
 
-HDLCFrame* create_u_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length) {
-    HDLCFrame* frame = (HDLCFrame*)malloc(sizeof(HDLCFrame));
-    initialize_frame(frame, address, control, data, data_length);
-    return frame;
+void init_IFrame(IFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
+                 uint8_t send_sequence_number, uint8_t* data, size_t data_length) {
+    init_HDLCFrame(&frame->base, address,
+                   ((receive_sequence_number & 0b111) << 6) | ((poll_final & 0b1) << 4) |
+                   ((send_sequence_number & 0b111) << 1) | 0,
+                   data, data_length);
+    frame->receive_sequence_number = receive_sequence_number;
+    frame->poll_final = poll_final;
+    frame->send_sequence_number = send_sequence_number;
 }
 
-HDLCFrame* create_s_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length, uint8_t receive_sequence_number, uint8_t send_sequence_number) {
-    HDLCFrame* frame = (HDLCFrame*)malloc(sizeof(HDLCFrame));
-    initialize_frame(frame, address, control, data, data_length);
-    frame->control |= (receive_sequence_number << 2) & 0xFC;
-    frame->control |= (send_sequence_number << 1) & 0xFE;
-    return frame;
+void init_SFrame(SFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
+                 const char* frame_type) {
+    uint8_t frame_type_value;
+    if (strcmp(frame_type, "RR") == 0) {
+        frame_type_value = 0;
+    } else if (strcmp(frame_type, "RNR") == 0) {
+        frame_type_value = 1;
+    } else if (strcmp(frame_type, "REJ") == 0) {
+        frame_type_value = 2;
+    } else if (strcmp(frame_type, "SREJ") == 0) {
+        frame_type_value = 3;
+    } else {
+        // Handle error
+        return;
+    }
+
+    init_HDLCFrame(&frame->base, address,
+                   ((receive_sequence_number & 0b111) << 6) | ((poll_final & 0b1) << 5) |
+                   ((frame_type_value & 0b111) << 2) | 1,
+                   NULL, 0);
+    frame->receive_sequence_number = receive_sequence_number;
+    frame->poll_final = poll_final;
+    frame->frame_type = frame_type;
 }
 
-HDLCFrame* create_i_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length, uint8_t sequence_number) {
-    HDLCFrame* frame = (HDLCFrame*)malloc(sizeof(HDLCFrame));
-    initialize_frame(frame, address, control, data, data_length);
-    frame->control |= (sequence_number << 1) & 0xFE;
-    return frame;
-}
+void init_UFrame(UFrame* frame, uint8_t address, uint8_t poll_final, const char* frame_type,
+                 uint8_t* data, size_t data_length) {
+    uint8_t frame_type_value;
+    if (strcmp(frame_type, "BP") == 0) {
+        frame_type_value = 63;
+    } else {
+        // Handle error
+        return;
+    }
+
+    init_HDLCFrame(&frame->base, address, (frame_type_value << 2) | 3, data, data_length);
+    frame->poll_final = poll_final;
+    frame->frame_type = frame_type;
+}

hdlc/hdlc_frame.h

@@ -2,7 +2,6 @@
 #define HDLC_FRAME_H
 
 #include <stdint.h>
-#define MAX_FRAME_LENGTH 256
 
 typedef struct {
     uint8_t address;
@@ -11,13 +10,36 @@ typedef struct {
     size_t data_length;
 } HDLCFrame;
 
-void initialize_frame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length);
-uint16_t calculate_fcs(HDLCFrame* frame);
-void create_frame(HDLCFrame* frame, uint8_t* frame_data, size_t* frame_length);
+void init_HDLCFrame(HDLCFrame* frame, uint8_t address, uint8_t control, uint8_t* data, size_t data_length);
+uint16_t calculate_fcs(const HDLCFrame *frame, size_t i);
+void create_frame(const HDLCFrame* frame, uint8_t* result);
 
-HDLCFrame* create_u_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length);
-HDLCFrame* create_s_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length, uint8_t receive_sequence_number, uint8_t send_sequence_number);
-HDLCFrame* create_i_frame(uint8_t address, uint8_t control, uint8_t* data, size_t data_length, uint8_t sequence_number);
+typedef struct {
+    HDLCFrame base;
+    uint8_t receive_sequence_number;
+    uint8_t poll_final;
+    uint8_t send_sequence_number;
+} IFrame;
 
+void init_IFrame(IFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
+                 uint8_t send_sequence_number, uint8_t* data, size_t data_length);
 
-#endif
+typedef struct {
+    HDLCFrame base;
+    uint8_t receive_sequence_number;
+    uint8_t poll_final;
+    const char* frame_type;
+} SFrame;
+
+void init_SFrame(SFrame* frame, uint8_t address, uint8_t receive_sequence_number, uint8_t poll_final,
+                 const char* frame_type);
+
+typedef struct {
+    HDLCFrame base;
+    uint8_t poll_final;
+    const char* frame_type;
+} UFrame;
+
+void init_UFrame(UFrame* frame, uint8_t address, uint8_t poll_final, const char* frame_type, uint8_t* data, size_t data_length);
+
+#endif

hdlc/test_hdlc_frame.c

@@ -1,42 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include "hdlc_frame.h"
-
-void print_frame(uint8_t* frame_data, size_t frame_length) {
-    printf("Сформированный кадр:\n");
-    for (size_t i = 0; i < frame_length; i++) {
-        printf("%02X ", frame_data[i]);
-    }
-    printf("\n");
-}
-
-int main() {
-    uint8_t address = 0x01;
-    uint8_t control = 0x02;
-    uint8_t data[] = {0x10, 0x20, 0x30};
-    size_t data_length = sizeof(data) / sizeof(data[0]);
-
-    HDLCFrame* u_frame = create_u_frame(address, control, data, data_length);
-    uint8_t u_frame_data[MAX_FRAME_LENGTH];
-    size_t u_frame_length;
-    create_frame(u_frame, u_frame_data, &u_frame_length);
-    print_frame(u_frame_data, u_frame_length);
-
-    HDLCFrame* s_frame = create_s_frame(address, control, data, data_length, 0x01, 0x02);
-    uint8_t s_frame_data[MAX_FRAME_LENGTH];
-    size_t s_frame_length;
-    create_frame(s_frame, s_frame_data, &s_frame_length);
-    print_frame(s_frame_data, s_frame_length);
-
-    HDLCFrame* i_frame = create_i_frame(address, control, data, data_length, 0x03);
-    uint8_t i_frame_data[MAX_FRAME_LENGTH];
-    size_t i_frame_length;
-    create_frame(i_frame, i_frame_data, &i_frame_length);
-    print_frame(i_frame_data, i_frame_length);
-
-    free(u_frame);
-    free(s_frame);
-    free(i_frame);
-
-    return 0;
-}