first commit

include/microtcp.h

@@ -0,0 +1,57 @@
+
+#include <stddef.h>
+#include <stdint.h>
+#include <assert.h>
+#include <stdbool.h>
+
+typedef struct microtcp_t        microtcp_t;
+typedef struct microtcp_socket_t microtcp_socket_t;
+
+#define MICROTCP_MAX_BUFFERS 8
+#define MICROTCP_MAX_SOCKETS 32
+
+typedef struct { 
+    uint8_t data[6]; 
+} microtcp_mac_t;
+
+typedef uint32_t microtcp_ip_t;
+
+typedef enum {
+
+    MICROTCP_ERRCODE_NONE = 0,
+
+    // Returned by microtcp_open and microtcp_accept
+    MICROTCP_ERRCODE_SOCKETLIMIT,
+
+    // Returned by microtcp_open
+    MICROTCP_ERRCODE_TCPERROR,
+    MICROTCP_ERRCODE_BADCONDVAR,
+
+    // Returned by microtcp_accept
+    MICROTCP_ERRCODE_NOTLISTENER,
+    MICROTCP_ERRCODE_CANTBLOCK,
+    MICROTCP_ERRCODE_NOTHINGTOACCEPT,
+
+    // Returned by microtcp_recv and microtcp_send
+    MICROTCP_ERRCODE_NOTCONNECTION,
+
+} microtcp_errcode_t;
+
+typedef struct {
+    void *data;
+    void (*free)(void *data);
+    int  (*send)(void *data, const void *src, size_t len);
+    int  (*recv)(void *data, void *dst, size_t len);
+} microtcp_callbacks_t;
+
+microtcp_t        *microtcp_create();
+microtcp_t        *microtcp_create_using_callbacks(microtcp_ip_t ip, microtcp_mac_t mac, microtcp_callbacks_t callbacks);
+void               microtcp_destroy(microtcp_t *mtcp);
+const char        *microtcp_strerror(microtcp_errcode_t errcode);
+microtcp_socket_t *microtcp_open(microtcp_t *mtcp, uint16_t port, microtcp_errcode_t *errcode);
+microtcp_socket_t *microtcp_accept(microtcp_socket_t *socket, bool no_block, microtcp_errcode_t *errcode);
+void               microtcp_close(microtcp_socket_t *socket);
+size_t             microtcp_send(microtcp_socket_t *socket, const void *src, size_t len, microtcp_errcode_t *errcode);
+size_t             microtcp_recv(microtcp_socket_t *socket,       void *dst, size_t len, microtcp_errcode_t *errcode);
+void               microtcp_step(microtcp_t *mtcp);
+void               microtcp_process_packet(microtcp_t *mtcp, const void *packet, size_t len);