TCP Node boilerplate; CLI interface

include/tcpd/tcpconnection.h

@@ -1,29 +1,64 @@
-#ifndef TCPCLIENT_H
-#define TCPCLIENT_H
+#ifndef TCPCONNECTION_H
+#define TCPCONNECTION_H
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
 #include <arpa/inet.h>
 #include <pthread.h>
+#include <stdbool.h>
+#include <stddef.h>
 #include <stdint.h>
-#include <dynarr.h>
 
-#define MTU 1500
+#define TCP_IO_BUFFER_SIZE 1500
+#define TCP_FRAME_HEADER_SIZE 4U
+#define TCP_MAX_FRAME_PAYLOAD (1024U * 1024U)
 
-struct tcp_connection_t {
-    int clientFd;
-    struct sockaddr_in clientAddr;
-    uint32_t clientId;
-
-    unsigned char dataBuf[MTU];
-    ssize_t dataBufLen;
-    void (*on_data)(struct tcp_connection_t* client);
-    void (*on_disconnect)(struct tcp_connection_t* client);
-
-    pthread_t clientThread;
-};
+typedef enum {
+    TCP_CONNECTION_ROLE_INBOUND = 0,
+    TCP_CONNECTION_ROLE_OUTBOUND = 1
+} tcp_connection_role_t;
 
 typedef struct tcp_connection_t tcp_connection_t;
 
+struct tcp_connection_t {
+    int sockFd;
+    struct sockaddr_in peerAddr;
+    uint32_t connectionId;
+    tcp_connection_role_t role;
+
+    pthread_t ioThread;
+    pthread_mutex_t sendLock;
+    pthread_mutex_t stateLock;
+
+    bool closing;
+    bool disconnectedNotified;
+
+    unsigned char* dataBuf;
+    size_t dataBufLen;
+    size_t dataBufCap;
+
+    unsigned char headerBuf[TCP_FRAME_HEADER_SIZE];
+    size_t headerBytesRead;
+    uint32_t expectedPayloadLen;
+    unsigned char* frameBuf;
+    size_t frameBytesRead;
+
+    void (*on_data)(tcp_connection_t* conn);
+    void (*on_disconnect)(tcp_connection_t* conn);
+    void* owner;
+};
+
+int TcpConnection_Init(tcp_connection_t* conn, int sockFd, const struct sockaddr_in* peerAddr, tcp_connection_role_t role);
+void TcpConnection_Destroy(tcp_connection_t* conn);
+
+int TcpConnection_SetDataBuffer(tcp_connection_t* conn, const unsigned char* data, size_t len);
+
+void TcpConnection_ResetFramingState(tcp_connection_t* conn);
+int TcpConnection_FeedFramedData(tcp_connection_t* conn, const unsigned char* input, size_t inputLen);
+
+int TcpConnection_SendRaw(int sockFd, const void* data, size_t len);
+int TcpConnection_SendFramed(tcp_connection_t* conn, const void* payload, size_t payloadLen);
+
+void TcpConnection_RequestClose(tcp_connection_t* conn);
+void TcpConnection_MarkDisconnectNotified(tcp_connection_t* conn);
+bool TcpConnection_IsDisconnectNotified(tcp_connection_t* conn);
+
 #endif