Split project over multiple files

src/tcp.h

@@ -0,0 +1,80 @@
+#ifndef TCP_INCLUDED
+#define TCP_INCLUDED
+
+#include <stdbool.h>
+
+#ifdef _WIN32
+#else
+#include <poll.h>
+#include <errno.h>
+#include <unistd.h>
+#include <arpa/inet.h>
+#define POLL poll
+#define CLOSE_SOCKET close
+#define SOCKET int
+#define INVALID_SOCKET -1
+#endif
+
+#include "byte_queue.h"
+
+#define MAX_CONNS 512
+
+typedef enum {
+    EVENT_MESSAGE,
+    EVENT_CONNECT,
+    EVENT_DISCONNECT,
+} EventType;
+
+typedef struct {
+    EventType type;
+    int conn_idx;
+} Event;
+
+typedef struct {
+    uint32_t data;
+} IPv4;
+
+typedef struct {
+    uint16_t data[8];
+} IPv6;
+
+typedef struct {
+    union {
+        IPv4 ipv4;
+        IPv6 ipv6;
+    };
+    bool is_ipv4;
+    uint16_t port;
+} Address;
+
+typedef struct {
+    SOCKET    fd;
+    int       tag;
+    bool      connecting;
+    bool      closing;
+    uint32_t  msglen;
+    ByteQueue input;
+    ByteQueue output;
+} Connection;
+
+typedef struct {
+    SOCKET listen_fd;
+    int    num_conns;
+    Connection conns[MAX_CONNS];
+} TCP;
+
+bool addr_eql(Address a, Address b);
+void tcp_context_init(TCP *tcp);
+void tcp_context_free(TCP *tcp);
+int  tcp_index_from_tag(TCP *tcp, int tag);
+int  tcp_listen(TCP *tcp, char *addr, uint16_t port);
+int  tcp_next_message(TCP *tcp, int conn_idx, ByteView *msg, uint16_t *type);
+void tcp_consume_message(TCP *tcp, int conn_idx);
+int  tcp_process_events(TCP *tcp, Event *events);
+ByteQueue *tcp_output_buffer(TCP *tcp, int conn_idx);
+int  tcp_connect(TCP *tcp, Address addr, int tag, ByteQueue **output);
+void tcp_close(TCP *tcp, int conn_idx);
+void tcp_set_tag(TCP *tcp, int conn_idx, int tag);
+int  tcp_get_tag(TCP *tcp, int conn_idx);
+
+#endif // TCP_INCLUDED