Initial connect instruction support, connection UUIDs

guacamole/libguac/Makefile

@@ -1,6 +1,6 @@
 
 CFLAGS=-O2 -fPIC -pedantic -Wall -Werror -Iinclude
-LDFLAGS=-lpng
+LDFLAGS=-lpng -luuid
 
 .PHONY: clean doc
 

guacamole/libguac/client.c

@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <uuid/uuid.h>
 
 #include "guacio.h"
 #include "protocol.h"
@@ -53,19 +54,57 @@ void guac_free_png_buffer(png_byte** png_buffer, int h) {
 
 }
 
-guac_client* guac_get_client(int client_fd, guac_client_init_handler* client_init, const char* hostname, int port) {
+guac_client* __guac_alloc_client(GUACIO* io) {
 
+    /* Allocate new client (not handoff) */
     guac_client* client = malloc(sizeof(guac_client));
 
-    client->io = guac_open(client_fd);
+    /* Init new client */
+    client->io = io;
+    uuid_generate(client->uuid); 
 
+    return client;
+}
+
+
+guac_client* guac_get_client(int client_fd, guac_client_init_handler* client_init, const char* hostname, int port) {
+
+    guac_client* client;
+    GUACIO* io = guac_open(client_fd);
+    guac_instruction instruction;
+
+    /* Wait for handshaking messages */
+    for (;;) {
+
+        int retval;
+        retval = guac_read_instruction(io, &instruction); /* 0 if no instructions finished yet, <0 if error or EOF */
+
+        if (retval > 0) {
+           
+            /* connect -> create new client connection */
+            if (strcmp(instruction.opcode, "connect") == 0) {
+                client = __guac_alloc_client(io);
+                guac_send_uuid(io, client->uuid);
+                break;
+            }
+
+        }
+
+        if (retval < 0)
+            return NULL; /* EOF or error */
+
+        /* Otherwise, retval == 0 implies unfinished instruction */
+
+    }
+
+    /* FIXME: hostname and port should not be required. Should be made available in some sort of client-contained argc/argv, specified after the protocol on the commandline */
     client_init(client, hostname, port);
     guac_flush(client->io);
-
     return client;
 
 }
 
+
 void guac_free_client(guac_client* client) {
     if (client->free_handler)
         client->free_handler(client);

guacamole/libguac/include/client.h

@@ -21,6 +21,7 @@
 #define _CLIENT_H
 
 #include <png.h>
+#include <uuid/uuid.h>
 
 #include "guacio.h"
 
@@ -46,6 +47,12 @@ typedef void guac_client_free_handler(void* client);
  */
 struct guac_client {
 
+    /**
+     * UUID identifying this client. Useful when identifying a client
+     * for connection handoff/resume.
+     */
+    uuid_t uuid;
+
     /**
      * The GUACIO structure to be used to communicate with the web-client. It is
      * expected that the implementor of any Guacamole proxy client will provide

guacamole/libguac/include/protocol.h

@@ -21,6 +21,7 @@
 #define __PROTOCOL_H
 
 #include <png.h>
+#include <uuid/uuid.h>
 
 #include "guacio.h"
 
@@ -40,6 +41,7 @@ char* guac_unescape_string_inplace(char* str);
 void guac_send_name(GUACIO* io, const char* name);
 void guac_send_error(GUACIO* io, const char* error);
 void guac_send_clipboard(GUACIO* io, const char* data);
+void guac_send_uuid(GUACIO* io, uuid_t uuid);
 void guac_send_size(GUACIO* io, int w, int h);
 void guac_send_copy(GUACIO* io, int srcx, int srcy, int w, int h, int dstx, int dsty);
 void guac_send_png(GUACIO* io, int x, int y, png_byte** png_rows, int w, int h);

guacamole/libguac/protocol.c

@@ -26,6 +26,8 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 
+#include <uuid/uuid.h>
+
 #include "guacio.h"
 #include "protocol.h"
 
@@ -154,6 +156,15 @@ void guac_send_size(GUACIO* io, int w, int h) {
     guac_write_string(io, ";");
 }
 
+void guac_send_uuid(GUACIO* io, uuid_t uuid) {
+
+    guac_write_string(io, "uuid:");
+    guac_write_base64(io, uuid, 16);
+    guac_flush_base64(io);
+    guac_write_string(io, ";");
+
+}
+
 void guac_send_clipboard(GUACIO* io, const char* data) {
 
     char* escaped = guac_escape_string(data);