sgsn: Add a function to return the pdp ctx for an mm ctx and tei

2 files changed, 18 insertions, 1 deletions

diff --git a/openbsc/include/openbsc/gprs_sgsn.h b/openbsc/include/openbsc/gprs_sgsn.h
index e449ccea0..7d461ecb0 100644
--- a/openbsc/include/openbsc/gprs_sgsn.h
+++ b/openbsc/include/openbsc/gprs_sgsn.h
@@ -299,6 +299,9 @@ struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_nsapi(const struct sgsn_mm_ctx *mm,
 /* look up PDP context by MM context and transaction ID */
 struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm,
 					 uint8_t tid);
+/* look up PDP context by MM context and gtp TEI */
+struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tei(const struct sgsn_mm_ctx *mm,
+					uint32_t tei);
 
 struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm,
 					uint8_t nsapi);
diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c
index 0d8c8cc45..8fea5fb82 100644
--- a/openbsc/src/gprs/gprs_sgsn.c
+++ b/openbsc/src/gprs/gprs_sgsn.c
@@ -40,6 +40,8 @@
 #include <openbsc/signal.h>
 #include "openbsc/gprs_llc.h"
 
+#include <pdp.h>
+
 #include <time.h>
 
 #include <openssl/rand.h>
@@ -317,6 +319,19 @@ struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tid(const struct sgsn_mm_ctx *mm,
 	return NULL;
 }
 
+/* look up PDP context by MM context and gtp TEI */
+struct sgsn_pdp_ctx *sgsn_pdp_ctx_by_tei(const struct sgsn_mm_ctx *mm,
+					uint32_t tei)
+{
+	struct sgsn_pdp_ctx *pdp;
+
+	llist_for_each_entry(pdp, &mm->pdp_list, list) {
+		if (pdp->lib->teid_own == tei)
+			return pdp;
+	}
+	return NULL;
+}
+
 /* you don't want to use this directly, call sgsn_create_pdp_ctx() */
 struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm,
 					uint8_t nsapi)
@@ -340,7 +355,6 @@ struct sgsn_pdp_ctx *sgsn_pdp_ctx_alloc(struct sgsn_mm_ctx *mm,
 	return pdp;
 }
 
-#include <pdp.h>
 /*
  * This function will not trigger any GSM DEACT PDP ACK messages, so you
  * probably want to call sgsn_delete_pdp_ctx() instead if the connection