ZR10/main.c

# include <stdint.h>
# include <stdio.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <string.h>
# include <endian.h>
# include <sys/types.h>
# include <arpa/inet.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <unistd.h>
# include <glib-unix.h>

uint16_t crc16_xmodem(void* data, size_t len)
{
        static const uint16_t crcs[256] =
        {
                0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
                0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
                0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
                0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
                0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
                0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
                0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
                0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
                0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
                0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
                0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
                0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
                0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
                0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
                0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
                0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
                0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
                0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
                0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
                0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
                0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
                0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
                0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
                0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
                0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
                0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
                0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
                0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
                0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
                0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
                0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
                0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
        };

        uint16_t crc = 0;

        for (int i = 0; i < len; i++) {
                crc = (crc << 8) ^ crcs[((crc >> 8) ^ ((uint8_t*)data)[i]) & 0x00FF];
        }
	return crc;
}

struct zr10
{
        uint16_t 	x5566;
        uint8_t 	need_ack :1;
        uint8_t 	is_ack   :1;
        uint16_t        data_len;
        uint16_t        seq;
        uint8_t         command;
        uint8_t         data[0];
} 			__attribute__((packed));

int zr10_command(uint8_t *buffer, uint8_t cmd, uint8_t *data, size_t len)
{
        struct zr10 *zr10 = (struct zr10 *)buffer;

        zr10->x5566 		= htobe16(0x5566);
        zr10->need_ack 		= 1;
        zr10->is_ack 		= 0;
        zr10->seq 		= htole16(0);
        zr10->command           = cmd;

        if (data != NULL && len > 0) {
                memcpy(zr10->data, data, len);
        }
        zr10->data_len = htole16(len);

        uint16_t crc = htole16(crc16_xmodem(zr10, sizeof(struct zr10) + len));
        memcpy(zr10->data + zr10->data_len, &crc, sizeof(crc));

        return sizeof(zr10) + len + sizeof(crc);
}

struct application
{
        GMainLoop 	*loop;
        gboolean         done;
};

static gboolean stop(gpointer data)
{
        struct application *app  = (struct application *)data;
        g_main_loop_quit(app->loop);
        return app->done = TRUE;
}

extern gboolean got_ack(GIOChannel *channel, GIOCondition cond, gpointer data)
{
        struct application *app  = (struct application *)data;
        int udp = g_io_channel_unix_get_fd(channel);
        struct sockaddr_in from;
        socklen_t from_len = sizeof(from);
        uint8_t ack[2048];

        int n = recvfrom(udp, ack, sizeof(ack), MSG_WAITALL, (struct sockaddr *)&from, &from_len);
        if (n > 0) {
                printf("%-15s: ", inet_ntoa(from.sin_addr));
                for (int i = 0; i < n; i++) {
                        printf(" %02x", ack[i]);
                }
                printf("\n");
        } else {
                perror("recv");
        }

        g_main_loop_quit(app->loop);
        return app->done = TRUE;
}

# define PORT 37260

int main(int argc, char *argv[])
{
        struct application app;
        uint8_t buffer[128];
        int udp, on = 1;
        struct sockaddr_in addr;

        uint8_t command = 0;
        int8_t data[256];
        int len = 0;

        if ((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
                perror("socket");
                return 1;
        }

        if (setsockopt(udp, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on)) < 0) {
                perror("setsockopt");
                return 1;
        }

        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
        addr.sin_addr.s_addr = htonl(INADDR_ANY);
        addr.sin_port = htons(0);

        bind(udp, (struct sockaddr *)&addr, sizeof(addr));

        g_unix_signal_add (SIGINT,  stop, &app);
        g_unix_signal_add (SIGHUP,  stop, &app);
        g_unix_signal_add (SIGTERM, stop, &app);

        GIOChannel *ch = g_io_channel_unix_new(udp);
        g_io_add_watch(ch, G_IO_IN, got_ack, &app);

        if (argc == 2 && argv[1][0] == '.') {
                command = 0x08;
                data[0] = 1;
                len = 1;
        } else {
                command = 0x07;
                len = 2;

                if (argc > 2) {
                        data[1] = atoi(argv[2]);
                        if (data[1] > 100) {
                                data[1] = 100;
                        } else if (data[1] < -100) {
                                data[1] = -100;
                        }
                }

                if (argc > 1) {
                        data[0] = atoi(argv[1]);
                        if (data[0] > 100) {
                                data[0] = 100;
                        } else if (data[0] < -100) {
                                data[0] = -100;
                        }
                }
        }

        addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
        addr.sin_port = htons(PORT);

        int n = zr10_command(buffer, command, (uint8_t*)data, len);
        printf("%-15s: ", inet_ntoa(addr.sin_addr));
        for (int i = 0; i < n; i++) {
                printf(" %02x", buffer[i]);
        }
        printf("\n");

        if (sendto(udp, buffer, n, MSG_CONFIRM, (const struct sockaddr *)&addr, sizeof(addr)) < 0) {
                perror("send");
        }

# if 1
        app.loop = g_main_loop_new(NULL, FALSE);
        g_main_loop_run(app.loop);
        g_main_loop_unref(app.loop);
# endif

        close(udp);
        return 0;
}