From 7fed9f758f44c6a96eb43460f95b26dcd5ef7a21 Mon Sep 17 00:00:00 2001
From: James Prestwood <prestwoj@gmail.com>
Date: Tue, 19 Oct 2021 11:19:03 -0700
Subject: [PATCH] ie: add ie_parse_oci

This is a very minimal parser, more or less to put the type
and length checks into a single location.
---
 src/ie.c | 20 ++++++++++++++++++++
 src/ie.h |  2 ++
 2 files changed, 22 insertions(+)

diff --git a/src/ie.c b/src/ie.c
index 11746c5c..a5f3cbc2 100644
--- a/src/ie.c
+++ b/src/ie.c
@@ -2552,3 +2552,23 @@ int ie_parse_owe_transition(const void *data, size_t len,
 
 	return 0;
 }
+
+int ie_parse_oci(const void *data, size_t len, const uint8_t **oci)
+{
+	struct ie_tlv_iter iter;
+
+	ie_tlv_iter_init(&iter, data, len);
+
+	if (!ie_tlv_iter_next(&iter))
+		return -EMSGSIZE;
+
+	if (ie_tlv_iter_get_length(&iter) != 3)
+		return -EMSGSIZE;
+
+	if (ie_tlv_iter_get_tag(&iter) != IE_TYPE_OCI)
+		return -EPROTOTYPE;
+
+	*oci = ie_tlv_iter_get_data(&iter);
+
+	return 0;
+}
diff --git a/src/ie.h b/src/ie.h
index f6b15abb..b122524b 100644
--- a/src/ie.h
+++ b/src/ie.h
@@ -645,3 +645,5 @@ int ie_parse_network_cost(const void *data, size_t len,
 
 int ie_parse_owe_transition(const void *data, size_t len,
 				struct ie_owe_transition_info *info);
+
+int ie_parse_oci(const void *data, size_t len, const uint8_t **oci);