better TCP and started using libtuntap

2023-03-25 20:18:14 +01:00
parent 57c2f61ea3
commit 092ba2d1ad
17 changed files with 807 additions and 626 deletions
@@ -0,0 +1,62 @@
+#include <stdio.h>
+#include <microtcp.h>
+
+int main(void)
+{
+    microtcp_errcode_t errcode;
+
+    microtcp_t *mtcp = microtcp_create("10.0.0.5", "10.0.0.4", NULL, NULL);
+    if (mtcp == NULL)
+        return -1;
+    
+    uint16_t port = 80;
+    microtcp_socket_t *server = microtcp_open(mtcp, port, &errcode);
+    if (errcode) {
+        fprintf(stderr, "Error: %s\n", microtcp_strerror(errcode));
+        microtcp_destroy(mtcp);
+        return -1;
+    }
+    assert(server);
+    
+    fprintf(stderr, "Listening on port %d\n", port);
+
+    while (1) {
+        fprintf(stderr, "About to accept\n");
+        microtcp_socket_t *client = microtcp_accept(server, false, &errcode);
+        if (errcode) {
+            fprintf(stderr, "Error: %s\n", microtcp_strerror(errcode));
+            break;
+        }
+
+        fprintf(stderr, "Accepted a connection\n");
+
+        char buffer[1024];
+        size_t num = microtcp_recv(client, buffer, sizeof(buffer), false, &errcode);
+        if (errcode) {
+            fprintf(stderr, "Error: %s\n", microtcp_strerror(errcode));
+            goto handled;
+        }
+        fprintf(stderr, "(%ld bytes received)\n", num);
+
+        size_t sent1 = microtcp_send(client, "echo: ", 6, false, &errcode);
+        if (errcode) {
+            fprintf(stderr, "Error: %s\n", microtcp_strerror(errcode));
+            goto handled;
+        }
+        fprintf(stderr, "(%ld bytes sent 1)\n", sent1);
+
+        size_t sent2 = microtcp_send(client, buffer, num, false, &errcode);
+        if (errcode) {
+            fprintf(stderr, "Error: %s\n", microtcp_strerror(errcode));
+            goto handled;
+        }
+        fprintf(stderr, "(%ld bytes sent 2)\n", sent2);
+
+handled:
+        microtcp_close(client);
+    }
+    
+    microtcp_close(server);
+    microtcp_destroy(mtcp);
+    return 0;
+}