Move global apn_list inside struct sgsn_instance

This way apns are managed by the lifcycle of the main global struct
sgsn_instance automatically.

Change-Id: I8cc8e540cfb64d0f130e9c0aaedf7b0835f8fe16

include/osmocom/sgsn/apn.h

@@ -6,8 +6,6 @@ struct sgsn_ggsn_ctx;
 
 #define GSM_APN_LENGTH 102
 
-extern struct llist_head sgsn_apn_ctxts;
-
 struct apn_ctx {
 	struct llist_head list;
 	struct sgsn_ggsn_ctx *ggsn;

include/osmocom/sgsn/sgsn.h

@@ -151,6 +151,7 @@ struct sgsn_instance {
 
 	struct rate_ctr_group *rate_ctrs;
 
+	struct llist_head apn_list; /* list of struct sgsn_apn_ctx */
 	struct llist_head ggsn_list; /* list of struct sgsn_ggsn_ctx */
 	struct llist_head mme_list; /* list of struct sgsn_mme_ctx */
 

src/sgsn/apn.c

@@ -25,22 +25,21 @@
 #include <talloc.h>
 
 #include <osmocom/sgsn/apn.h>
+#include <osmocom/sgsn/sgsn.h>
 
 extern void *tall_sgsn_ctx;
 
-LLIST_HEAD(sgsn_apn_ctxts);
-
 static struct apn_ctx *sgsn_apn_ctx_alloc(const char *ap_name, const char *imsi_prefix)
 {
 	struct apn_ctx *actx;
 
-	actx = talloc_zero(tall_sgsn_ctx, struct apn_ctx);
+	actx = talloc_zero(sgsn, struct apn_ctx);
 	if (!actx)
 		return NULL;
 	actx->name = talloc_strdup(actx, ap_name);
 	actx->imsi_prefix = talloc_strdup(actx, imsi_prefix);
 
-	llist_add_tail(&actx->list, &sgsn_apn_ctxts);
+	llist_add_tail(&actx->list, &sgsn->apn_list);
 
 	return actx;
 }
@@ -59,7 +58,7 @@ struct apn_ctx *sgsn_apn_ctx_match(const char *name, const char *imsi)
 	size_t name_prio = 0;
 	size_t name_req_len = strlen(name);
 
-	llist_for_each_entry(actx, &sgsn_apn_ctxts, list) {
+	llist_for_each_entry(actx, &sgsn->apn_list, list) {
 		size_t name_ref_len, imsi_ref_len;
 		const char *name_ref_start, *name_match_start;
 
@@ -106,7 +105,7 @@ struct apn_ctx *sgsn_apn_ctx_by_name(const char *name, const char *imsi_prefix)
 {
 	struct apn_ctx *actx;
 
-	llist_for_each_entry(actx, &sgsn_apn_ctxts, list) {
+	llist_for_each_entry(actx, &sgsn->apn_list, list) {
 		if (strcasecmp(name, actx->name) == 0 &&
 		    strcasecmp(imsi_prefix, actx->imsi_prefix) == 0)
 			return actx;

src/sgsn/gprs_sgsn.c

@@ -658,7 +658,7 @@ struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx,
 				insert_extra(tp, mmctx->subscr->sgsn_data, pdp);
 				continue;
 			}
-			if (!llist_empty(&sgsn_apn_ctxts)) {
+			if (!llist_empty(&sgsn->apn_list)) {
 				apn_ctx = sgsn_apn_ctx_match(req_apn_str, mmctx->imsi);
 				/* Not configured */
 				if (apn_ctx == NULL)
@@ -711,7 +711,7 @@ struct sgsn_ggsn_ctx *sgsn_mm_ctx_find_ggsn_ctx(struct sgsn_mm_ctx *mmctx,
 
 	if (apn_ctx != NULL) {
 		ggsn = apn_ctx->ggsn;
-	} else if (llist_empty(&sgsn_apn_ctxts)) {
+	} else if (llist_empty(&sgsn->apn_list)) {
 		/* No configuration -> use GGSN 0 */
 		ggsn = sgsn_ggsn_ctx_by_id(0);
 	} else if (allow_any_apn &&
@@ -821,6 +821,7 @@ struct sgsn_instance *sgsn_instance_alloc(void *talloc_ctx)
 	inst->rate_ctrs = rate_ctr_group_alloc(inst, &sgsn_ctrg_desc, 0);
 	OSMO_ASSERT(inst->rate_ctrs);
 
+	INIT_LLIST_HEAD(&inst->apn_list);
 	INIT_LLIST_HEAD(&inst->ggsn_list);
 	INIT_LLIST_HEAD(&inst->mme_list);
 

src/sgsn/sgsn_vty.c

@@ -311,9 +311,9 @@ static int config_write_sgsn(struct vty *vty)
 	llist_for_each_entry(acl, &g_cfg->imsi_acl, list)
 		vty_out(vty, " imsi-acl add %s%s", acl->imsi, VTY_NEWLINE);
 
-	if (llist_empty(&sgsn_apn_ctxts))
+	if (llist_empty(&sgsn->apn_list))
 		vty_out(vty, " ! apn * ggsn 0%s", VTY_NEWLINE);
-	llist_for_each_entry(actx, &sgsn_apn_ctxts, list) {
+	llist_for_each_entry(actx, &sgsn->apn_list, list) {
 		if (strlen(actx->imsi_prefix) > 0)
 			vty_out(vty, " apn %s imsi-prefix %s ggsn %u%s",
 				actx->name, actx->imsi_prefix, actx->ggsn->id,

tests/sgsn/sgsn_test.c

@@ -1346,6 +1346,7 @@ static void test_apn_matching(void)
 	struct apn_ctx *actx, *actxs[9];
 
 	printf("Testing APN matching\n");
+	sgsn = sgsn_instance_alloc(tall_sgsn_ctx);
 
 	actxs[0] = sgsn_apn_ctx_find_alloc("*.test", "");
 	actxs[1] = sgsn_apn_ctx_find_alloc("*.def.test", "");