l2tpns-dont-timeshift-unidirectional-traffic.patch

[l2tpns.git] / tbf.c

diff --git a/tbf.c b/tbf.c
index 3c8a211..117ebd8 100644 (file)
--- a/tbf.c
+++ b/tbf.c
@@ -1,8 +1,9 @@
 // L2TPNS: token bucket filters
 
-char const *cvs_id_tbf = "$Id: tbf.c,v 1.3 2004/07/02 07:31:23 bodea Exp $";
+char const *cvs_id_tbf = "$Id: tbf.c,v 1.6 2004/09/02 04:18:07 fred_nerk Exp $";
+
+#define _GNU_SOURCE
 
-#include <malloc.h>
 #include <string.h>
 #include <unistd.h>
 #include <sys/mman.h>
@@ -11,41 +12,8 @@ char const *cvs_id_tbf = "$Id: tbf.c,v 1.3 2004/07/02 07:31:23 bodea Exp $";
 #include "util.h"
 #include "tbf.h"
 
-// Need a time interval.
-
-#define TBF_MAX_QUEUE  2       // Maximum of 2 queued packet per
-#define TBF_MAX_SIZE   3000    // Maxiumum queued packet size is 2048.
-
-#define TBF_MAX_CREDIT 6000    // Maximum 6000 bytes of credit.
-#define TBF_RATE       360     // 360 bytes per 1/10th of a second.
-
-typedef struct {
-       int             credit;
-       int             lasttime;
-       int             queued;
-       int             oldest; // Position of packet in the ring buffer.
-       sessionidt      sid;    // associated session ID.
-       int             max_credit; // Maximum amount of credit available (burst size).
-       int             rate;   // How many bytes of credit per second we get? (sustained rate)
-       void            (*send)(sessionidt s, u8 *, int);       // Routine to actually send out the data.
-       int             prev;   // Timer chain position.
-       int             next;   // Timer chain position.
-
-       u32     b_queued;       // Total bytes sent through this TBF
-       u32     b_sent;         // Total bytes sucessfully made it to the network.
-       u32     p_queued;       // ditto packets.
-       u32     p_sent;         // ditto packets.
-       u32     b_dropped;      // Total bytes dropped.
-       u32     p_dropped;      // Total packets dropped.
-       u32     p_delayed;      // Total packets not sent immediately.
-
-       int             sizes[TBF_MAX_QUEUE];
-       char            packets[TBF_MAX_QUEUE][TBF_MAX_SIZE];
-} tbft;
-
-
-tbft * filter_list = NULL;
-int filter_list_size = 0;
+tbft *filter_list = NULL;
+static int filter_list_size = 0;
 
 static int timer_chain = -1;   // Head of timer chain.
 
@@ -53,8 +21,7 @@ static void tbf_run_queue(int tbf_id);
 
 void init_tbf(void)
 {
-       filter_list = mmap(NULL, sizeof(*filter_list) * MAXTBFS, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, 0, 0);
-       if (!filter_list)
+       if ((filter_list = shared_malloc(sizeof(*filter_list) * MAXTBFS)) == MAP_FAILED)
                return;
 
        filter_list_size = MAXTBFS;
@@ -156,23 +123,32 @@ int new_tbf(int sid, int max_credit, int rate, void (*f)(sessionidt, u8 *, int))
                return p;
        }
 
-       log(0,0,0,0, "Ran out of token bucket filters! Sess %d will be un-throttled\n", sid);
-       return 0;
-
 #if 0
-       // Not using. Disasterous if called via the CLI! :)
-               // All allocated filters are used! Increase the size of the allocated
-               // filters.
+       // All allocated filters are used! Increase the size of the allocated
+       // filters.
 
-       i = filter_list_size;
-       filter_list_size = filter_list_size * 2 + 1;
+       {
+               int new_size = filter_list_size * 2;
+               tbft *new = mremap(filter_list, filter_list_size * sizeof(*new), new_size * sizeof(*new), MREMAP_MAYMOVE);
 
-       filter_list = realloc(filter_list, filter_list_size * sizeof(*filter_list) );
+               if (new == MAP_FAILED)
+               {
+                       log(0,0,0,0, "Ran out of token bucket filters and mremap failed!  Sess %d will be un-throttled\n", sid);
+                       return 0;
+               }
+
+               i = filter_list_size;
+               filter_list_size = new_size;
+               filter_list = new;
+       }
 
        for (; i < filter_list_size; ++i)
                filter_list[i].sid = 0;
 
        goto again;
+#else
+       log(0,0,0,0, "Ran out of token bucket filters!  Sess %d will be un-throttled\n", sid);
+       return 0;
 #endif
 }