- I forgot to add new file to cvs repo during my last commit, I'm sorry
authorJiri Hnidek <jiri.hnidek@tul.cz>
Tue, 3 Oct 2006 11:09:58 +0000 (11:09 +0000)
committerJiri Hnidek <jiri.hnidek@tul.cz>
Tue, 3 Oct 2006 11:09:58 +0000 (11:09 +0000)
extern/verse/dist/vs_master.c [new file with mode: 0644]

diff --git a/extern/verse/dist/vs_master.c b/extern/verse/dist/vs_master.c
new file mode 100644 (file)
index 0000000..4fa020d
--- /dev/null
@@ -0,0 +1,131 @@
+/*
+ * Master server communication code.
+*/
+
+#include <stdio.h>
+#include <string.h>
+
+#include "verse.h"
+#include "v_util.h"
+#include "vs_server.h"
+
+#define        MASTER_SERVER_PERIOD    (60.0)  /* Period between ANNOUNCE to master server, in seconds. */
+
+static struct {
+       boolean         enabled;
+       boolean         started;
+       const char      *master;
+       char            desc[64];
+       const char      *tags;
+       VUtilTimer      timer;
+} server_info;
+
+#define        LEFT(d) (sizeof server_info.desc - (d - server_info.desc) - 1)
+
+void vs_master_set_enabled(boolean enabled)
+{
+       server_info.enabled = enabled;
+}
+
+const char * vs_master_get_address(void)
+{
+       return server_info.master;
+}
+
+void vs_master_set_address(const char *address)
+{
+       server_info.master = address;
+}
+
+void vs_master_set_desc(const char *desc)
+{
+       const char      *src = desc;
+       char            *dst = server_info.desc;
+
+       for(; *src != '\0' && LEFT(dst) > 0;)
+       {
+               if(*src == '"')
+               {
+                       if(LEFT(dst) < 2)
+                               break;
+                       *dst++ = '\\';
+               }
+               else if(*src == '\\')
+               {
+                       if(LEFT(dst) < 2)
+                               break;
+                       *dst++ = '\\';
+               }
+               *dst++ = *src++;
+       }
+       *dst = '\0';
+}
+
+void vs_master_set_tags(const char *tags)
+{
+       server_info.tags = tags;        /* This needs more protection, instead of relying on the master server. */
+}
+
+void vs_master_update(void)
+{
+       if(!server_info.enabled || server_info.master == NULL)
+               return;
+
+       if(!server_info.started)
+       {
+               v_timer_start(&server_info.timer);
+               v_timer_advance(&server_info.timer, MASTER_SERVER_PERIOD);
+               server_info.started = TRUE;
+               return;
+       }
+       if(v_timer_elapsed(&server_info.timer) < MASTER_SERVER_PERIOD)
+               return;
+       verse_send_ping(server_info.master, "MS:ANNOUNCE");
+       v_timer_start(&server_info.timer);
+/*     printf("MS:ANNOUNCE sent to %s\n", server_info.master);*/
+}
+
+/* Check if a description request, of the form "A,B,C,...,D" includes the given keyword. This needs to
+ * do more than just a simple strstr(), since the keyword may be a prefix. Shades of OpenGL extensions.
+*/
+static int desc_has_keyword(const char *desc, const char *keyword)
+{
+       const char      *ptr;
+
+       if(desc == NULL || *desc == '\0')       /* Quick-check for empty description. */
+               return 0;
+
+       if((ptr = strstr(desc, keyword)) != NULL)
+       {
+               size_t  kl = strlen(keyword);
+
+               return ptr[kl] == ',' || ptr[kl] == '\0';
+       }
+       return 0;
+}
+
+static int keyword_fits(size_t used, size_t max, const char *key, const char *value)
+{
+       size_t  vsize = 0;
+
+       if(key != NULL && value != NULL)
+               vsize += 1 + strlen(key) + 1 + 1 + strlen(value) + 1;
+
+       return max - 1 - used >= vsize;
+}
+
+static char * append_desc(char *buf, const char *key, const char *value)
+{
+       return buf + sprintf(buf, " %s=\"%s\"", key, value);
+}
+
+void vs_master_handle_describe(const char *address, const char *message)
+{
+       char    desc[1380] = "DESCRIPTION", *put = desc + 11;
+
+       if(desc_has_keyword(message, "DE") && server_info.desc != NULL && keyword_fits(put - desc, sizeof desc, "DE", server_info.desc))
+               put = append_desc(put, "DE", server_info.desc);
+       if(desc_has_keyword(message, "TA") && server_info.tags != NULL && keyword_fits(put - desc, sizeof desc, "TA", server_info.tags))
+               put = append_desc(put, "TA", server_info.tags);
+       verse_send_ping(address, desc);
+}