2005-11-09 Carl Worth <cworth@cworth.org>

[ttt] / src / ttt-server.c

diff --git a/src/ttt-server.c b/src/ttt-server.c
index b42db7a95064811b95fff78b4f0070236b4fe69c..2cac1177209caf16d7cafb6b2394e384490352e0 100644 (file)
--- a/src/ttt-server.c
+++ b/src/ttt-server.c
@@ -20,16 +20,62 @@
  */
 
 #include "ttt.h"
+#include "ttt-socket.h"
+
+static void
+ttt_dispatch (int connected_socket)
+{
+#define BUF_SIZE 1024
+
+    while (1) {
+       char buf[BUF_SIZE];
+       int cnt;
+       cnt = read (connected_socket, buf, BUF_SIZE);
+       if (cnt == 0)
+           break;
+       write (0, buf, cnt);
+       write (connected_socket, buf, cnt);
+    }
+}
+
+static const char *WELCOME_MESSAGE = 
+"Welcome to ttt-server. So far, this program is simply a demonstration\n"
+"of a TCP/IP server that handles one client at a time. The server is\n"
+"currently listening on:\n"
+"\n    %s:%s\n"
+"\nTo test this program, simply connect a client to that host and port.\n"
+"For example:\n"
+"\n    telnet %s %s\n"
+"\nOnce you have connected a client, the server will echo any characters\n"
+"it receives back to the client as well as to stdout.\n"
+"\nNote that to terminate the telnet client you type Control-], then\n"
+"<Enter>, then \"close\" (and <Enter>) at the \"telnet> \" prompt.\n"
+"\nHave fun!\n"
+"-Carl\n"
+"\nPS. The server handles only one client at a time, but multiple clients\n"
+"may be able to connect simultaneously. Subsequent clients will see no\n"
+"output from the server until all previous clients exit.\n"
+"\nExtending the server to fork a new process for each client would be a fun\n"
+"project for a motivated student (as would writing a custom client program).\n\n";
 
 int 
 main (int argc, char **argv)
 {
     ttt_args_t args;
-    int args_first;
+    int socket;
+
+    ttt_args_parse (&args, argc, argv);
+
+    if (args.log_file)
+       stderr = xfreopen (args.log_file, "a", stderr);
+
+    socket = ttt_socket_create_server (args.host, args.port);
 
-    ttt_args_parse (&args, argc, argv, &args_first);
+    printf (WELCOME_MESSAGE, args.host, args.port, args.host, args.port);
 
-    /* XXX: insert code here */
+    while (1)
+       ttt_socket_accept (socket, ttt_dispatch);
 
-    return 0;
+    /* We only reach here if something bad happened. */
+    return 1;
 }