94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "common.h"
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#include "raw.h"
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struct __attribute__((packed)) raw_mode_s_short_overlay {
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char asterisk;
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char payload[14];
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char semicolon;
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char lf;
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};
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struct __attribute__((packed)) raw_mode_s_long_overlay {
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char asterisk;
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char payload[28];
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char semicolon;
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char lf;
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};
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static bool raw_parse_mode_s_short(struct buf *buf, struct packet *packet) {
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struct raw_mode_s_short_overlay *short_overlay = (struct raw_mode_s_short_overlay *) buf_at(buf, 0);
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if (buf->length < sizeof(*short_overlay) ||
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short_overlay->asterisk != '*' ||
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short_overlay->semicolon != ';' ||
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short_overlay->lf != '\n') {
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return false;
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}
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packet->type = MODE_S_SHORT;
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hex_to_bin(packet->payload, short_overlay->payload, sizeof(short_overlay->payload) / 2);
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buf_consume(buf, sizeof(*short_overlay));
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return true;
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}
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static bool raw_parse_mode_s_long(struct buf *buf, struct packet *packet) {
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struct raw_mode_s_long_overlay *long_overlay = (struct raw_mode_s_long_overlay *) buf_at(buf, 0);
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if (buf->length < sizeof(*long_overlay) ||
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long_overlay->asterisk != '*' ||
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long_overlay->semicolon != ';' ||
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long_overlay->lf != '\n') {
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return false;
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}
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packet->type = MODE_S_LONG;
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hex_to_bin(packet->payload, long_overlay->payload, sizeof(long_overlay->payload) / 2);
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buf_consume(buf, sizeof(*long_overlay));
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return true;
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}
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static void raw_serialize_mode_s_short(struct packet *packet, struct buf *buf) {
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struct raw_mode_s_short_overlay *overlay = (struct raw_mode_s_short_overlay *) buf_at(buf, 0);
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overlay->asterisk = '*';
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overlay->semicolon = ';';
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overlay->lf = '\n';
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hex_from_bin(overlay->payload, packet->payload, sizeof(overlay->payload) / 2);
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buf->length = sizeof(*overlay);
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}
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static void raw_serialize_mode_s_long(struct packet *packet, struct buf *buf) {
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struct raw_mode_s_long_overlay *overlay = (struct raw_mode_s_long_overlay *) buf_at(buf, 0);
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overlay->asterisk = '*';
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overlay->semicolon = ';';
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overlay->lf = '\n';
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hex_from_bin(overlay->payload, packet->payload, sizeof(overlay->payload) / 2);
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buf->length = sizeof(*overlay);
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}
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void raw_init() {
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assert(sizeof(struct raw_mode_s_short_overlay) < BUF_LEN_MAX);
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assert(sizeof(struct raw_mode_s_long_overlay) < BUF_LEN_MAX);
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}
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bool raw_parse(struct buf *buf, struct packet *packet, void *state_in) {
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return (
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raw_parse_mode_s_short(buf, packet) ||
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raw_parse_mode_s_long(buf, packet));
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}
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void raw_serialize(struct packet *packet, struct buf *buf) {
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if (!packet) {
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return;
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}
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switch (packet->type) {
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case MODE_S_SHORT:
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raw_serialize_mode_s_short(packet, buf);
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break;
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case MODE_S_LONG:
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raw_serialize_mode_s_long(packet, buf);
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break;
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}
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}
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