neocturne/gmrf-babel
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Add alloca_packet() macro

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This commit is contained in:
Matthias Schiffer 2013-03-21 02:01:41 +01:00
parent de428f0b8f
commit e099bddc24
2 changed files with 10 additions and 6 deletions
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9
src/packet.h
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@ -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);
}

7
src/send.c
View file

@ -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)