Calculate tcUrl length

diff --git a/rtmpdump.c b/rtmpdump.c
index a8fa1283f835bc0ea1f40143256a930690b759c3..892a8bcf4b6f9e15d5096228c6c01f63eb33dd20 100644 (file)
--- a/rtmpdump.c
+++ b/rtmpdump.c
@@ -1152,13 +1152,12 @@ main(int argc, char **argv)
 
   if (tcUrl.av_len == 0)
     {
-      char str[1024];
-
-      tcUrl.av_len = snprintf(str, sizeof(str), "%s://%.*s:%d/%.*s",
+         tcUrl.av_len = strlen(RTMPProtocolStringsLower[protocol]) +
+               hostname.av_len + app.av_len + sizeof("://:65535/");
+      tcUrl.av_val = (char *) malloc(tcUrl.av_len);
+      tcUrl.av_len = snprintf(tcUrl.av_val, tcUrl.av_len, "%s://%.*s:%d/%.*s",
                   RTMPProtocolStringsLower[protocol], hostname.av_len,
                   hostname.av_val, port, app.av_len, app.av_val);
-      tcUrl.av_val = (char *) malloc(tcUrl.av_len + 1);
-      strcpy(tcUrl.av_val, str);
     }
 
   int first = 1;