-#include <malloc.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/mman.h>
+// L2TPNS: token bucket filters
+
+char const *cvs_id_tbf = "$Id: tbf.c,v 1.12 2005/05/02 09:55:04 bodea Exp $";
+#include <string.h>
#include "l2tpns.h"
+#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.
static void tbf_run_queue(int tbf_id);
-void init_tbf(void)
+void init_tbf(int num_tbfs)
{
- 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) * num_tbfs)))
return;
- filter_list_size = MAXTBFS;
+ filter_list_size = num_tbfs;
filter_list[0].sid = -1; // Reserved.
}
//
if (filter_list[id].next == id) { // Last element in chain?
if (timer_chain != id) { // WTF?
- log(0,0,0,0, "Removed a singleton element from TBF, but tc didn't point to it!\n");
+ LOG(0, 0, 0, "Removed a singleton element from TBF, but tc didn't point to it!\n");
} else
timer_chain = -1;
filter_list[id].next = filter_list[id].prev = 0;
//
// Allocate a new token bucket filter.
//
-int new_tbf(int sid, int max_credit, int rate, void (*f)(sessionidt, u8 *, int))
+int new_tbf(int sid, int max_credit, int rate, void (*f)(sessionidt, uint8_t *, int))
{
int i;
static int p = 0;
- log(3,0,0,0, "Allocating new TBF (sess %d, rate %d, helper %p)\n", sid, rate, f);
+ LOG(4, 0, 0, "Allocating new TBF (sess %d, rate %d, helper %p)\n", sid, rate, f);
if (!filter_list)
return 0; // Couldn't alloc memory!
-// again:
-
for (i = 0 ; i < filter_list_size ; ++i, p = (p+1)%filter_list_size ) {
if (filter_list[p].sid)
continue;
return p;
}
- log(0,0,0,0, "Ran out of token bucket filters! Sess %d will be un-throttled\n", sid);
+ LOG(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.
-
- i = filter_list_size;
- filter_list_size = filter_list_size * 2 + 1;
-
- filter_list = realloc(filter_list, filter_list_size * sizeof(*filter_list) );
-
- for (; i < filter_list_size; ++i)
- filter_list[i].sid = 0;
-
- goto again;
-#endif
}
//
f = &filter_list[tbf_id];
// Calculate available credit...
- f->credit += (config->current_time - f->lasttime) * f->rate / 10; // current time is 1/10th of a second.
+ f->credit += (TIME - f->lasttime) * f->rate / 10; // current time is 1/10th of a second.
if (f->credit > f->max_credit)
f->credit = f->max_credit;
- f->lasttime = config->current_time;
+ f->lasttime = TIME;
while (f->queued > 0 && f->credit >= f->sizes[f->oldest]) { // While we have enough credit..
for (i = 0; i < filter_list_size; ++i) {
if (!filter_list[i].next)
continue;
- if (filter_list[i].lasttime == config->current_time) // Did we just run it?
+ if (filter_list[i].lasttime == TIME) // Did we just run it?
continue;
- log(1,0,0,0, "Missed tbf %d! Not on the timer chain?(n %d, p %d, tc %d)\n", i,
+ LOG(1, 0, 0, "Missed tbf %d! Not on the timer chain?(n %d, p %d, tc %d)\n", i,
filter_list[i].next, filter_list[i].prev, timer_chain);
tbf_run_queue(i);
}
int i;
int count = 0;
+ if (CLI_HELP_REQUESTED)
+ return CLI_HELP_NO_ARGS;
+
if (!config->cluster_iam_master) {
- cli_print(cli, "Command can't be run on a slave.");
+ cli_error(cli, "Can't do this on a slave. Do it on %s",
+ fmtaddr(config->cluster_master_address, 0));
+
return CLI_OK;
}
+
if (!filter_list)
return CLI_OK;
cli_print(cli, "%d tbf entries used, %d total", count, filter_list_size);
return CLI_OK;
}
-
projects / l2tpns.git / blobdiff