add osmo_pfcp_ip_addrs_get

This pattern shows up a lot when working with PFCP. Let's make it easier
to handle IPv4 and v6 at the same time.

Change-Id: I4338a83f26ef2443f90cf835621e73aed5eac521
---
M include/osmocom/pfcp/pfcp_ies_custom.h
M src/libosmo-pfcp/pfcp_msg.c
2 files changed, 50 insertions(+), 0 deletions(-)

diff --git a/include/osmocom/pfcp/pfcp_ies_custom.h b/include/osmocom/pfcp/pfcp_ies_custom.h
index 0540bfe..84f862a 100644
--- a/include/osmocom/pfcp/pfcp_ies_custom.h
+++ b/include/osmocom/pfcp/pfcp_ies_custom.h
@@ -25,6 +25,7 @@
 #pragma once
 
 #include <osmocom/core/socket.h>
+#include <osmocom/core/sockaddr_str.h>
 
 #include <osmocom/pfcp/pfcp_proto.h>
 
@@ -40,6 +41,11 @@
 int osmo_pfcp_ip_addrs_to_str_buf(char *buf, size_t buflen, const struct osmo_pfcp_ip_addrs *addrs);
 char *osmo_pfcp_ip_addrs_to_str_c(void *ctx, const struct osmo_pfcp_ip_addrs *addrs);
 
+int osmo_pfcp_ip_addrs_get(struct osmo_sockaddr *v4, struct osmo_sockaddr *v6,
+			   struct osmo_pfcp_ip_addrs *src);
+int osmo_pfcp_ip_addrs_get_str(struct osmo_sockaddr_str *v4, struct osmo_sockaddr_str *v6,
+			       struct osmo_pfcp_ip_addrs *src);
+
 /* 3GPP TS 29.244 8.2.38, IETF RFC 1035 3.1 */
 struct osmo_pfcp_ie_node_id {
 	enum osmo_pfcp_node_id_type type;
diff --git a/src/libosmo-pfcp/pfcp_msg.c b/src/libosmo-pfcp/pfcp_msg.c
index abcee18..66f6e59 100644
--- a/src/libosmo-pfcp/pfcp_msg.c
+++ b/src/libosmo-pfcp/pfcp_msg.c
@@ -514,6 +514,38 @@
 	}
 }
 
+int osmo_pfcp_ip_addrs_get(struct osmo_sockaddr *v4, struct osmo_sockaddr *v6, struct osmo_pfcp_ip_addrs *src)
+{
+	if (v4) {
+		if (src->v4_present)
+			*v4 = src->v4;
+		else
+			*v4 = (struct osmo_sockaddr){ .u.sa.sa_family = AF_UNSPEC };
+	}
+	if (v6) {
+		if (src->v6_present)
+			*v6 = src->v6;
+		else
+			*v6 = (struct osmo_sockaddr){ .u.sa.sa_family = AF_UNSPEC };
+	}
+	return 0;
+}
+
+int osmo_pfcp_ip_addrs_get_str(struct osmo_sockaddr_str *v4, struct osmo_sockaddr_str *v6, struct osmo_pfcp_ip_addrs *src)
+{
+	if (v4) {
+		if (src->v4_present)
+			return osmo_sockaddr_str_from_sockaddr(v4, &src->v4.u.sas);
+		*v4 = (struct osmo_sockaddr_str){};
+	}
+	if (v6) {
+		if (src->v6_present)
+			return osmo_sockaddr_str_from_sockaddr(v6, &src->v6.u.sas);
+		*v6 = (struct osmo_sockaddr_str){};
+	}
+	return 0;
+}
+
 /* If a osmo_fsm_inst placed in m->ctx deallocates before the osmo_pfcp_msg, call this function, to make sure to avoid
  * use after free. Alternatively use m->ctx.*_use_count to make sure the FSM inst does not deallocate before the
  * osmo_pfcp_msg is discarded from the resend queue. */

