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authorMatthias Schiffer <mschiffer@universe-factory.net>2013-03-21 02:01:41 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2013-03-21 02:01:41 +0100
commite099bddc24fad6c628e29284a585bd50404768b6 (patch)
tree350e9c44bb5680505d71d961a70f374e03c17023 /src
parentde428f0b8f3a959038d06d00fcf2fb4d2ce156d2 (diff)
downloadbabel-e099bddc24fad6c628e29284a585bd50404768b6.tar
babel-e099bddc24fad6c628e29284a585bd50404768b6.zip
Add alloca_packet() macro
Diffstat (limited to 'src')
-rw-r--r--src/packet.h9
-rw-r--r--src/send.c7
2 files changed, 10 insertions, 6 deletions
diff --git a/src/packet.h b/src/packet.h
index 286192e..07c0f3b 100644
--- a/src/packet.h
+++ b/src/packet.h
@@ -29,6 +29,8 @@
#include "types.h"
+#include <alloca.h>
+
#include <arpa/inet.h>
@@ -41,6 +43,13 @@ struct __attribute__((packed)) gp_babel_packet {
uint8_t tlv[];
};
+#define alloca_packet(size) ({ \
+ gp_babel_packet_t *__packet = alloca(sizeof(gp_babel_packet_t)+size); \
+ __packet->version = htons(GP_BABEL_VERSION); \
+ __packet->len = 0; \
+ __packet; \
+ })
+
static inline size_t gp_babel_packet_size(const gp_babel_packet_t *packet) {
return sizeof(gp_babel_packet_t)+ntohs(packet->len);
}
diff --git a/src/send.c b/src/send.c
index 5f06218..7fc9453 100644
--- a/src/send.c
+++ b/src/send.c
@@ -30,8 +30,6 @@
#include "tlv.h"
#include "tlv_types.h"
-#include <alloca.h>
-
static void add_ihus(gmrf_t *gmrf, gp_babel_packet_t *packet, size_t max_len, const gp_babel_iface_t *iface) {
const gp_babel_neigh_t *neigh;
@@ -52,10 +50,7 @@ static void add_ihus(gmrf_t *gmrf, gp_babel_packet_t *packet, size_t max_len, co
void gp_babel_send_hellos(gmrf_t *gmrf, gmrf_context_t *ctx) {
gmrf_logf(gmrf, LOG_DEBUG, "sending hellos...");
- gp_babel_packet_t *packet = alloca(sizeof(gp_babel_packet_t)+GP_BABEL_PACKET_MAX);
-
- packet->version = htons(GP_BABEL_VERSION);
- packet->len = 0;
+ gp_babel_packet_t *packet = alloca_packet(GP_BABEL_PACKET_MAX);
gp_babel_tlv_hello_t *hello = gp_babel_tlv_add(packet, GP_BABEL_PACKET_MAX, TLV_HELLO, sizeof(gp_babel_tlv_hello_t));
if (!hello)