Hook the paging code into bsc_hack.c and telnet_interface.c

Wrote and test code to add and remove paging requests... This
will be using the fact that the linux list is building a circle
on each tick we can send one/x paging requests and continue round
robin...

include/openbsc/paging.h

@@ -27,6 +27,7 @@
 #include "linuxlist.h"
 #include "gsm_data.h"
 #include "gsm_subscriber.h"
+#include "timer.h"
 
 /**
  * A pending paging request 
@@ -35,6 +36,8 @@ struct paging_request {
 	struct llist_head entry;
 	struct gsm_subscriber *subscr;
 	struct gsm_bts *bts;
+
+	int chan_type;
 };
 
 /*
@@ -49,13 +52,17 @@ struct paging_bts {
 
 	/* pending requests */
 	struct llist_head pending_requests;
+	struct paging_request *last_request;
 	struct gsm_bts *bts;
+
+	/* tick timer */
+	struct timer_list page_timer;
 };
 
 /* call once for every gsm_bts... */
 struct paging_bts* page_allocate(struct gsm_bts *bts);
 
 /* schedule paging request */
-void page_request(struct gsm_bts *bts, struct gsm_subscriber *subscr);
+void page_request(struct gsm_bts *bts, struct gsm_subscriber *subscr, int type);
 
 #endif

src/bsc_hack.c

@@ -44,6 +44,7 @@
 #include <openbsc/debug.h>
 #include <openbsc/misdn.h>
 #include <openbsc/telnet_interface.h>
+#include <openbsc/paging.h>
 
 /* global pointer to the gsm network data structure */
 static struct gsm_network *gsmnet;
@@ -598,6 +599,12 @@ static int set_system_infos(struct gsm_bts *bts)
 	return 0;
 }
 
+/*
+ * Inform anyone...
+ */
+static void bsc_hack_channel_allocated(struct gsm_lchan *lchan) {
+}
+
 /*
  * Patch the various SYSTEM INFORMATION tables to update
  * the LAI
@@ -662,6 +669,7 @@ static void mi_cb(int event, struct gsm_bts *bts)
 static int bootstrap_network(void)
 {
 	struct gsm_bts *bts;
+	struct paging_bts *paging_bts;
 
 	/* initialize our data structures */
 	gsmnet = gsm_network_init(1, MCC, MNC);
@@ -675,6 +683,9 @@ static int bootstrap_network(void)
 	bts->trx[0].arfcn = ARFCN;
 	patch_tables(bts);
 
+	paging_bts = page_allocate(bts);
+	paging_bts->channel_allocated = bsc_hack_channel_allocated;
+
 	telnet_init(gsmnet, 4242);
 	if (mi_setup(bts, 0, mi_cb) < 0)
 		return -EIO;

src/paging.c

@@ -38,8 +38,40 @@
 #include <openbsc/paging.h>
 #include <openbsc/debug.h>
 
+#define PAGING_TIMEOUT 0, 5000
+
 static LLIST_HEAD(managed_bts);
 
+/*
+ * Kill one paging request update the internal list...
+ */
+static void page_remove_request(struct paging_bts *paging_bts) {
+	struct paging_request *to_be_deleted = paging_bts->last_request;
+	paging_bts->last_request =
+		(struct paging_request *)paging_bts->last_request->entry.next;
+	if (&to_be_deleted->entry == &paging_bts->pending_requests)
+		paging_bts->last_request = NULL;
+	llist_del(&to_be_deleted->entry);
+	free(to_be_deleted);
+}
+
+
+static void page_handle_pending_requests(void *data) {
+	struct paging_bts *paging_bts = (struct paging_bts *)data;
+
+	if (!paging_bts->last_request)
+		paging_bts->last_request =
+			(struct paging_request *)paging_bts->pending_requests.next; 
+	if (&paging_bts->last_request->entry == &paging_bts->pending_requests) {
+		paging_bts->last_request = NULL;
+		return;
+	}
+
+	DEBUGP(DPAG, "Going to send paging commands: '%s'\n",
+		paging_bts->last_request->subscr->imsi);
+	schedule_timer(&paging_bts->page_timer, PAGING_TIMEOUT);
+}
+
 static int page_pending_request(struct paging_bts *bts,
 				struct gsm_subscriber *subscr) {
 	struct paging_request *req;
@@ -57,22 +89,30 @@ struct paging_bts* page_allocate(struct gsm_bts *bts) {
 
 	page = (struct paging_bts *)malloc(sizeof(*page));
 	memset(page, 0, sizeof(*page));
+	page->bts = bts;
+	INIT_LLIST_HEAD(&page->pending_requests);
+	page->page_timer.cb = page_handle_pending_requests;
+	page->page_timer.data = page;
+
 	llist_add_tail(&page->bts_list, &managed_bts);
 
 	return page;
 }
 
-void page_request(struct gsm_bts *bts, struct gsm_subscriber *subscr) {
+void page_request(struct gsm_bts *bts, struct gsm_subscriber *subscr, int type) {
 	struct paging_bts *bts_entry;
 	struct paging_request *req;
 
 	req = (struct paging_request *)malloc(sizeof(*req));
 	req->subscr = subscr_get(subscr);
 	req->bts = bts;
+	req->chan_type = type;
 
 	llist_for_each_entry(bts_entry, &managed_bts, bts_list) {
 		if (bts == bts_entry->bts && !page_pending_request(bts_entry, subscr)) {
 			llist_add_tail(&req->entry, &bts_entry->pending_requests);
+			if (!timer_pending(&bts_entry->page_timer))
+				schedule_timer(&bts_entry->page_timer, PAGING_TIMEOUT);
 			return;
 		}
 	}

src/telnet_interface.c

@@ -31,6 +31,7 @@
 #include <openbsc/gsm_04_08.h>
 #include <openbsc/msgb.h>
 #include <openbsc/abis_rsl.h>
+#include <openbsc/paging.h>
 
 extern void telnet_parse(struct telnet_connection *connection, char *line);
 
@@ -174,7 +175,7 @@ void telnet_page(struct telnet_connection *connection, const char *imsi, int typ
 	if (!subscr)
 		return;
 
-	rsl_paging_cmd_subscr(bts, type, subscr);
+	page_request(bts, subscr, type);	
 }
 
 void telnet_put_channel(struct telnet_connection *connection, const char *imsi) {