add initial framework

udp_bridge.c

@@ -0,0 +1,67 @@
+/*
+ * Used as a bridge for USBHID protocol for FIDO 2.0 and U2F to ease firmware development and testing.
+ *
+ * Client FIDO 2.0, U2F software should bind to UDP port 7112 to send/recv USBHID messages from.
+ *
+ * */
+
+#include <stdio.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+int udp_server()
+{
+    int fd;
+    if ( (fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
+        perror( "socket failed" );
+        return 1;
+    }
+
+    struct sockaddr_in serveraddr;
+    memset( &serveraddr, 0, sizeof(serveraddr) );
+    serveraddr.sin_family = AF_INET;
+    serveraddr.sin_port = htons( 8111 );
+    serveraddr.sin_addr.s_addr = htonl( INADDR_ANY );
+
+    if ( bind(fd, (struct sockaddr *)&serveraddr, sizeof(serveraddr)) < 0 ) {
+        perror( "bind failed" );
+        exit(1);
+    }
+    return fd;
+}
+
+void udp_recv(int fd, uint8_t * buf, int size)
+{
+    int length = recvfrom( fd, buf, size, 0, NULL, 0 );
+    if ( length < 0 ) {
+        perror( "recvfrom failed" );
+        exit(1);
+    }
+}
+
+
+void udp_send(int fd, uint8_t * buf, int size)
+{
+    struct sockaddr_in serveraddr;
+    memset( &serveraddr, 0, sizeof(serveraddr) );
+    serveraddr.sin_family = AF_INET;
+    serveraddr.sin_port = htons( 7112 );
+    serveraddr.sin_addr.s_addr = htonl( 0x7f000001 ); // (127.0.0.1)
+
+    if (sendto( fd, buf, size, 0, (struct sockaddr *)&serveraddr, sizeof(serveraddr)) < 0 ) {
+        perror( "sendto failed" );
+        exit(1);
+    }
+}
+
+void udp_close(int fd)
+{
+    close(fd);
+}
+
+