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Proto serialization support.

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This commit is contained in:
Ian Gulliver
2016-02-23 16:13:11 -08:00
parent a98eeec91e
commit 819518e402
2 changed files with 77 additions and 0 deletions
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72
adsbus/proto.c
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@@ -1,11 +1,83 @@
#include <assert.h>
#include <string.h>
#include "buf.h"
#include "packet.h"
#include "server.h"
#include "adsb.pb-c.h"
#include "proto.h"
#define PROTO_MAGIC "aDsB"
static void proto_obj_to_buf(Adsb *wrapper, struct buf *buf) {
assert(!buf->length);
assert(adsb__get_packed_size(wrapper) <= BUF_LEN_MAX);
buf->length = adsb__pack(wrapper, (uint8_t *) buf_at(buf, 0));
assert(buf->length);
}
static void proto_serialize_packet(struct packet *packet, AdsbPacket *out, size_t len) {
out->source_id = (char *) packet->source_id;
if (packet->mlat_timestamp) {
out->mlat_timestamp = packet->mlat_timestamp;
out->has_mlat_timestamp = true;
}
if (packet->rssi) {
out->rssi = packet->rssi;
out->has_rssi = true;
}
out->payload.data = packet->payload;
out->payload.len = len;
}
static void proto_serialize_mode_s_short(struct packet *packet, struct buf *buf) {
AdsbPacket packet_out = ADSB_PACKET__INIT;
proto_serialize_packet(packet, &packet_out, 7);
Adsb wrapper = ADSB__INIT;
wrapper.mode_s_short = &packet_out;
proto_obj_to_buf(&wrapper, buf);
}
static void proto_serialize_mode_s_long(struct packet *packet, struct buf *buf) {
AdsbPacket packet_out = ADSB_PACKET__INIT;
proto_serialize_packet(packet, &packet_out, 14);
Adsb wrapper = ADSB__INIT;
wrapper.mode_s_short = &packet_out;
proto_obj_to_buf(&wrapper, buf);
}
bool proto_parse(struct buf *buf, struct packet *packet, void *state_in) {
return false;
}
void proto_serialize(struct packet *packet, struct buf *buf) {
if (!packet) {
AdsbHeader header = ADSB_HEADER__INIT;
header.magic = PROTO_MAGIC;
header.server_version = server_version;
header.server_id = server_id;
header.mlat_timestamp_mhz = PACKET_MLAT_MHZ;
header.mlat_timestamp_max = PACKET_MLAT_MAX;
header.rssi_max = PACKET_RSSI_MAX;
Adsb wrapper = ADSB__INIT;
wrapper.header = &header;
proto_obj_to_buf(&wrapper, buf);
return;
}
switch (packet->type) {
case PACKET_TYPE_NONE:
break;
case PACKET_TYPE_MODE_S_SHORT:
proto_serialize_mode_s_short(packet, buf);
break;
case PACKET_TYPE_MODE_S_LONG:
proto_serialize_mode_s_long(packet, buf);
break;
}
}