guacamole-spice-protocol/src/protocols/rdp/guac_rdpdr/rdpdr_printer.c

#include <freerdp/utils/stream.h>
#include <freerdp/utils/svc_plugin.h>

#include <guacamole/protocol.h>

#include "rdpdr_messages.h"
#include "rdpdr_printer.h"
#include "rdpdr_service.h"
#include "client.h"

void guac_rdpdr_process_print_job_create(guac_rdpdrPlugin* rdpdr, STREAM* input_stream, int completion_id) {

    STREAM* output_stream = stream_new(24);

    /* No bytes received yet */
    rdpdr->bytes_received = 0;

    /* Write header */
    stream_write_uint16(output_stream, RDPDR_CTYP_CORE);
    stream_write_uint16(output_stream, PAKID_CORE_DEVICE_IOCOMPLETION);

    /* Write content */
    stream_write_uint32(output_stream, GUAC_PRINTER_DEVICE_ID);
    stream_write_uint32(output_stream, completion_id);
    stream_write_uint32(output_stream, 0); /* NTSTATUS - success */
    stream_write_uint32(output_stream, 0); /* fileId */

    svc_plugin_send((rdpSvcPlugin*) rdpdr, output_stream);

}

void guac_rdpdr_process_print_job_write(guac_rdpdrPlugin* rdpdr, STREAM* input_stream, int completion_id) {

    int length;
    unsigned char* buffer;

    rdp_guac_client_data* client_data = (rdp_guac_client_data*) rdpdr->client->data;
    STREAM* output_stream = stream_new(24);

    stream_read_uint32(input_stream, length);
    stream_seek(input_stream, 8);  /* Offset */
    stream_seek(input_stream, 20); /* Padding */
    buffer = stream_get_tail(input_stream);

    /* Send data */
    pthread_mutex_lock(&(client_data->update_lock));

    /* Create print job, if not yet created */
    if (rdpdr->bytes_received == 0) {

        char filename[1024] = "guacamole-print.ps";
        unsigned char* search = buffer;
        int i;

        /* Search for filename within buffer */
        for (i=0; i<length-9 && i < 2048; i++) {

            /* If title. use as filename */
            if (memcmp(search, "%%Title: ", 9) == 0) {

                /* Skip past "%%Title: " */
                search += 9;

                /* Copy as much of title as reasonable */
                int j;
                for (j=0; j<sizeof(filename) - 4 /* sizeof(".ps") + 1 */ && i<length; i++, j++) {

                    /* Get character, stop at EOL */
                    char c = *(search++);
                    if (c == '\r' || c == '\n')
                        break;

                    /* Copy to filename */
                    filename[j] = c;

                }

                /* Append filename with extension */
                strcpy(&(filename[j]), ".ps");
                break;
            }

            /* Next character */
            search++;

        }

        guac_client_log_info(rdpdr->client, "Print job created");
        guac_protocol_send_file(rdpdr->client->socket,
                GUAC_RDPDR_PRINTER_BLOB, "application/postscript", filename);

    }

    rdpdr->bytes_received += length;

    guac_protocol_send_blob(rdpdr->client->socket,
            GUAC_RDPDR_PRINTER_BLOB, buffer, length);
    pthread_mutex_unlock(&(client_data->update_lock));

    /* Write header */
    stream_write_uint16(output_stream, RDPDR_CTYP_CORE);
    stream_write_uint16(output_stream, PAKID_CORE_DEVICE_IOCOMPLETION);

    /* Write content */
    stream_write_uint32(output_stream, GUAC_PRINTER_DEVICE_ID);
    stream_write_uint32(output_stream, completion_id);
    stream_write_uint32(output_stream, 0); /* NTSTATUS - success */
    stream_write_uint32(output_stream, length);
    stream_write_uint8(output_stream, 0); /* padding (stated as optional in spec, but requests fail without) */

    svc_plugin_send((rdpSvcPlugin*) rdpdr, output_stream);

}

void guac_rdpdr_process_print_job_close(guac_rdpdrPlugin* rdpdr, STREAM* input_stream, int completion_id) {

    rdp_guac_client_data* client_data = (rdp_guac_client_data*) rdpdr->client->data;
    STREAM* output_stream = stream_new(24);

    /* Close file */
    guac_client_log_info(rdpdr->client, "Print job closed");
    pthread_mutex_lock(&(client_data->update_lock));
    guac_protocol_send_end(rdpdr->client->socket, GUAC_RDPDR_PRINTER_BLOB);
    pthread_mutex_unlock(&(client_data->update_lock));

    /* Write header */
    stream_write_uint16(output_stream, RDPDR_CTYP_CORE);
    stream_write_uint16(output_stream, PAKID_CORE_DEVICE_IOCOMPLETION);

    /* Write content */
    stream_write_uint32(output_stream, GUAC_PRINTER_DEVICE_ID);
    stream_write_uint32(output_stream, completion_id);
    stream_write_uint32(output_stream, 0); /* NTSTATUS - success */
    stream_write_uint32(output_stream, 0); /* padding*/

    svc_plugin_send((rdpSvcPlugin*) rdpdr, output_stream);

}