add totally unsophisticated socket listen/accept function

diff --git a/small_jtag_test/main.cpp b/small_jtag_test/main.cpp
index 63c9cf8947b58cd219a5f9885948c3b9fe418b06..73dd45bb2d4b31d595bc89b487aabd4b546e886b 100644 (file)
--- a/small_jtag_test/main.cpp
+++ b/small_jtag_test/main.cpp
@@ -1,3 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/select.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 
 #include <iostream>
 #include "add.cpp"
@@ -5,11 +12,6 @@
 using namespace std;
 
 extern "C" {
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/select.h>
 
 /* reads from a socket if it is ready (a single byte) and returns 1 if success
  */
@@ -38,13 +40,32 @@ int read_handler(int fdread, char *buffer)
     }
 }
 
-/*
-static void event_handler(int fd, short event, void *arg)
+/* nothing sophisticated: wait for an incoming connection
+ */
+int get_connection()
 {
-  if (event & EV_READ)
-    read_handler(fd, event, arg);
+       int listenfd = 0, connfd = 0;
+       struct sockaddr_in serv_addr;
+
+       listenfd = socket(AF_INET, SOCK_STREAM, 0);
+       memset(&serv_addr, '0', sizeof(serv_addr));
+
+       serv_addr.sin_family = AF_INET;
+       serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+       serv_addr.sin_port = htons(5000);
+
+       bind(listenfd, (struct sockaddr*)&serv_addr, sizeof(serv_addr));
+
+       listen(listenfd, 1);
+
+    connfd = accept(listenfd, (struct sockaddr*)NULL, NULL);
+    close(listenfd);
+
+    return connfd;
 }
 
+/*
+
 static void accept_conn_cb(struct evconnlistener *listener, evutil_socket_t fd, struct sockaddr *address, int socklen,  void *ctx)
 {
   struct session_s *s = (struct session_s*)ctx;