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-rw-r--r--src/libcharon/encoding/payloads/payload.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/payload.c b/src/libcharon/encoding/payloads/payload.c
index 188dd1c15..d1e677db7 100644
--- a/src/libcharon/encoding/payloads/payload.c
+++ b/src/libcharon/encoding/payloads/payload.c
@@ -196,3 +196,23 @@ bool payload_is_known(payload_type_t type)
#endif
return FALSE;
}
+
+/**
+ * See header.
+ */
+void* payload_get_field(payload_t *payload, encoding_type_t type, u_int skip)
+{
+ encoding_rule_t *rule;
+ size_t count;
+ int i;
+
+ payload->get_encoding_rules(payload, &rule, &count);
+ for (i = 0; i < count; i++)
+ {
+ if (rule[i].type == type && skip-- == 0)
+ {
+ return ((char*)payload) + rule[i].offset;
+ }
+ }
+ return NULL;
+}