new I/O multiplexer api; http echo server example draft to test the mux api; the library is now released as an amalgamation; recv/send now return the error MICROTCP_ERRCODE_WOULDBLOCK in a similar way to the BSD socket api; moved tests/loop2.c to examples/echo_tcp.c

2023-05-19 20:24:13 +02:00
parent 2a8741afe4
commit 464a1ee724
27 changed files with 3370 additions and 690 deletions
@@ -0,0 +1,64 @@
+#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) {
+        fprintf(stderr, "Error: Failed to instanciate microtcp stack\n");
+        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, "(%d bytes received)\n", (int) 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, "(%d bytes sent 1)\n", (int) 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, "(%d bytes sent 2)\n", (int) sent2);
+
+handled:
+        microtcp_close(client);
+    }
+    
+    microtcp_close(server);
+    microtcp_destroy(mtcp);
+    return 0;
+}