improved testing and connection handling

test/dumb/tcpserver4.cpp

@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h> 
+#include <unistd.h>  
+#include <stdlib.h>
+ 
+int atoi(const char *str);
+
+int main(int argc , char *argv[])
+{
+    if(argc < 2) {
+       printf("usage: tcp_server <port>\n");
+       return 0;
+    }
+
+    int comm_fd, sock, client_sock, c, read_size, port = atoi(argv[1]);
+    char client_message[2000];
+
+    struct sockaddr_in servaddr;
+    struct sockaddr_in client;
+
+    sock = socket(AF_INET, SOCK_STREAM, 0); 
+    bzero( &servaddr, sizeof(servaddr));
+ 
+    servaddr.sin_family = AF_INET;
+    servaddr.sin_addr.s_addr = htons(INADDR_ANY);
+    servaddr.sin_port = htons(port);
+    bind(sock, (struct sockaddr *) &servaddr, sizeof(servaddr));
+
+    printf("listening\n");
+    listen(sock , 3); 
+    printf("waiting to accept\n");
+    c = sizeof(struct sockaddr_in);
+    
+    client_sock = accept(sock, (struct sockaddr *)&client, (socklen_t*)&c);
+    if (client_sock < 0) {
+        perror("accept failed");
+        return 0;
+    }
+    printf("connection accepted\n reading...\n");
+     
+    // RX
+
+    int msglen = 1024;
+    unsigned long count = 0;
+    while(1)
+    {
+      count++;
+      int bytes_read = read(client_sock, client_message, msglen);
+      printf("[%lu] RX = (%d): %s\n", count, bytes_read, client_message);
+
+       /*
+       for(int i=0; i<bytes_read; i++) {
+          printf("%c", client_message[i]);
+       }
+       */
+       // TX
+       //int bytes_written = write(client_sock, "Server here!", 12); 
+       //printf("\t\nTX = %d\n", bytes_written);
+    }
+    return 0;
+}