udp_locator_service.c

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#include "skn_network_helpers.h"

int main(int argc, char *argv[])
{
    int exit_code = EXIT_SUCCESS;
    char response[SZ_COMM_BUFF];

    memset(response, 0, sizeof(response));

    skn_program_name_and_description_set(
            "udp_locator_service",
            "Provides IPv4 Address/Port Service info."
            );

    if (skn_handle_locator_command_line(argc, argv) == EXIT_FAILURE) {
        exit(EXIT_FAILURE);
    }
    if (gd_pch_message != NULL) {
        strncpy(response, gd_pch_message, sizeof(response));
        free(gd_pch_message); // from strdup()
        gd_pch_message = response;
    }
    skn_get_userids();
    skn_logger(SD_NOTICE, "%s-%s is in startup mode as user(%s)", gd_ch_program_name, PACKAGE_VERSION, gd_pch_effective_userid);

    if ((strlen(response) > 16) && (service_registry_valiadate_response_format(response) == EXIT_FAILURE)) {
        skn_logger(SD_EMERG, "Message format is invalid! cannot proceed.");
        service_registry_entry_response_message_log(response);
        exit(EXIT_FAILURE);
    }

    /* Initialize Signal handler */
    signals_init();

    gd_i_socket = skn_udp_host_create_broadcast_socket(SKN_FIND_RPI_PORT, 20.0);
    if (gd_i_socket == EXIT_FAILURE) {
        skn_logger(SD_EMERG, "Application Host Init Failed! ExitCode=%d", exit_code);
        signals_cleanup(gi_exit_flag);
        exit(EXIT_FAILURE);     
    }

    exit_code = service_registry_provider(gd_i_socket, response);
        skn_logger(SD_NOTICE, "Application ExitCode=%d", exit_code);
    
    if (gd_i_socket) close(gd_i_socket);
    signals_cleanup(gi_exit_flag);

    skn_logger(SD_NOTICE, "\n============================\nShutdown Complete\n============================\n");

    exit(exit_code);
}