From e8a1fab07da995e41bfb3781b6e644088239a606 Mon Sep 17 00:00:00 2001
From: Martine Lenders <mlenders@inf.fu-berlin.de>
Date: Thu, 11 Feb 2016 00:45:25 +0100
Subject: [PATCH] gnrc_pkt: provide type search function
---
Makefile.dep | 1 +
sys/include/net/gnrc/pkt.h | 12 ++++++++++++
sys/net/gnrc/Makefile | 3 +++
sys/net/gnrc/pkt/Makefile | 3 +++
sys/net/gnrc/pkt/gnrc_pkt.c | 32 ++++++++++++++++++++++++++++++++
5 files changed, 51 insertions(+)
create mode 100644 sys/net/gnrc/pkt/Makefile
create mode 100644 sys/net/gnrc/pkt/gnrc_pkt.c
diff --git a/Makefile.dep b/Makefile.dep
index 289bebf9cc..09eda58953 100644
--- a/Makefile.dep
+++ b/Makefile.dep
@@ -379,6 +379,7 @@ ifneq (,$(filter gnrc_pktbuf, $(USEMODULE)))
ifeq (,$(filter gnrc_pktbuf_%, $(USEMODULE)))
USEMODULE += gnrc_pktbuf_static
endif
+ USEMODULE += gnrc_pkt
endif
ifneq (,$(filter gnrc_pktbuf_%, $(USEMODULE)))
diff --git a/sys/include/net/gnrc/pkt.h b/sys/include/net/gnrc/pkt.h
index 7d4ab80dd2..2fb788c538 100644
--- a/sys/include/net/gnrc/pkt.h
+++ b/sys/include/net/gnrc/pkt.h
@@ -155,6 +155,18 @@ static inline size_t gnrc_pkt_count(const gnrc_pktsnip_t *pkt)
return count;
}
+/**
+ * @brief Searches the packet for a packet snip of a specific type
+ *
+ * @param[in] pkt list of packet snips
+ * @param[in] type the type to search for
+ *
+ * @return the packet snip in @p pkt with @ref gnrc_nettype_t @p type
+ * @return NULL, if none of the snips in @p pkt is of @p type
+ */
+gnrc_pktsnip_t *gnrc_pktsnip_search_type(gnrc_pktsnip_t *pkt,
+ gnrc_nettype_t type);
+
#ifdef __cplusplus
}
#endif
diff --git a/sys/net/gnrc/Makefile b/sys/net/gnrc/Makefile
index 28e2d4f390..35f8e41e76 100644
--- a/sys/net/gnrc/Makefile
+++ b/sys/net/gnrc/Makefile
@@ -73,6 +73,9 @@ endif
ifneq (,$(filter gnrc_nomac,$(USEMODULE)))
DIRS += link_layer/nomac
endif
+ifneq (,$(filter gnrc_pkt,$(USEMODULE)))
+ DIRS += pkt
+endif
ifneq (,$(filter gnrc_pktbuf_static,$(USEMODULE)))
DIRS += pktbuf_static
endif
diff --git a/sys/net/gnrc/pkt/Makefile b/sys/net/gnrc/pkt/Makefile
new file mode 100644
index 0000000000..60a0221a53
--- /dev/null
+++ b/sys/net/gnrc/pkt/Makefile
@@ -0,0 +1,3 @@
+MODULE := gnrc_pkt
+
+include $(RIOTBASE)/Makefile.base
diff --git a/sys/net/gnrc/pkt/gnrc_pkt.c b/sys/net/gnrc/pkt/gnrc_pkt.c
new file mode 100644
index 0000000000..1a9c51d5de
--- /dev/null
+++ b/sys/net/gnrc/pkt/gnrc_pkt.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2016 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ * @author Martine Lenders <mlenders@inf.fu-berlin.de>
+ */
+
+#include <assert.h>
+
+#include "net/gnrc/pkt.h"
+
+gnrc_pktsnip_t *gnrc_pktsnip_search_type(gnrc_pktsnip_t *ptr,
+ gnrc_nettype_t type)
+{
+ while (ptr != NULL) {
+ if (ptr->type == type) {
+ return ptr;
+ }
+ ptr = ptr->next;
+ }
+ return NULL;
+}
+
+/** @} */
--
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