1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350
|
/*
* Low level TCP and UDP IO communication implementation for
* bjnp backend for the Common UNIX Printing System (CUPS).
* Copyright 2008-2020 by Louis Lagendijk
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 or later.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdio.h>
#include "bjnp.h"
#include "bjnp-protocol.h"
#include "bjnp-commands.h"
#include "bjnp-io.h"
void
clear_cmd(bjnp_command_t *cmd)
{
memset(cmd, 0, sizeof(*cmd));
}
static void
bjnp_set_command_header(uint8_t dev_type, uint16_t seq_no, uint16_t session_id, bjnp_command_t *cmd,
char cmd_code,
int command_len)
{
/*
* Set command buffer with command code, session_id and lenght of payload
* Returns: sequence number of command
*/
memcpy(cmd->header.BJNP_id, BJNP_STRING, sizeof(cmd->header.BJNP_id));
cmd->header.dev_type = dev_type;
cmd->header.cmd_code = cmd_code;
cmd->header.unknown1 = htons(0);
cmd->header.payload_len = htonl(command_len - bjnp_header_size);
cmd->header.seq_no = htons(seq_no);
cmd->header.session_id = htons(session_id);
}
void bjnp_defaults_set_command_header(bjnp_command_t *cmd, char cmd_code,
int command_len)
{
bjnp_set_command_header(BJNP_CMD_PRINT, 0, 0, cmd, cmd_code, command_len);
}
int
bjnp_printer_set_command_header(printer_t *printer, bjnp_command_t *cmd, char cmd_code,
int command_len)
{
bjnp_set_command_header(/* printer-> dev_type */ BJNP_CMD_PRINT, ++printer->serial,
printer->session_id, cmd, cmd_code, command_len);
return printer->serial;
}
static int
bjnp_process_udp_command(http_addr_t *addr, bjnp_command_t *command,
int cmd_len, bjnp_response_t *response)
{
/*
* Send UDP command and retrieve response
* Returns: length of response or -1 in case of error
*/
int sockfd;
int numbytes;
fd_set fdset;
struct timeval timeout;
int attempt;
char ipaddress[128];
int port;
int size;
char family[BJNP_FAMILY_MAX];
get_address_info(addr, ipaddress, &port, family);
bjnp_debug(LOG_DEBUG, "Sending UDP command to %s port %d(%s)\n",
ipaddress, port, family);
if ((sockfd = socket(get_protocol_family(*addr), SOCK_DGRAM, 0)) == -1) {
bjnp_debug(LOG_CRIT, "bjnp_process_udp_command: sockfd - %s\n",
strerror(errno));
return -1;
}
size = sa_size(*addr);
if (connect(sockfd, &(addr->addr), (socklen_t) size)
!= 0) {
bjnp_debug(LOG_CRIT, "bjnp_process_udp_command: connect - %s\n",
strerror(errno));
close(sockfd);
return -1;
}
for (attempt = 0; attempt < 3; attempt++) {
if ((numbytes = send(sockfd, command, cmd_len, 0)) != cmd_len) {
bjnp_debug(LOG_CRIT, "bjnp_process_udp_command: Sent only %d bytes of packet",
numbytes);
}
FD_ZERO(&fdset);
FD_SET(sockfd, &fdset);
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if (select(sockfd + 1, &fdset, NULL, NULL, &timeout) <= 0) {
/* no data received OR error, in either case retry */
continue;
}
if ((numbytes = recv(sockfd, response, sizeof(*response), MSG_WAITALL)) == -1) {
bjnp_debug(LOG_CRIT, "bjnp_process_udp_command: no data received (recv)");
continue;
}
close(sockfd);
return numbytes;
}
/* max attempts reached, return failure */
close(sockfd);
return -1;
}
int
get_printer_id(http_addr_t *addr, char *model, char *IEEE1284_id)
{
/*
* get printer identity
* Sets model (make and model) and IEEE1284_id
*/
bjnp_command_t cmd;
bjnp_response_t id;
char printer_id[BJNP_IEEE1284_MAX];
int resp_len;
int id_len;
int min_size;
/* set defaults */
strcpy(model, "Unidentified printer");
strcpy(IEEE1284_id, "");
clear_cmd(&cmd);
bjnp_defaults_set_command_header(&cmd, CMD_UDP_GET_ID, sizeof(cmd.udp_get_id));
bjnp_hexdump(LOG_DEBUG2, "Get printer identity", (char *) &cmd,
sizeof(cmd.udp_get_id));
resp_len =
bjnp_process_udp_command(addr, &cmd, sizeof(cmd.udp_get_id),
&id);
min_size = bjnp_header_size + sizeof(id.udp_identity_response.id_len);
if (resp_len <= min_size) {
return -1;
}
bjnp_hexdump(LOG_DEBUG2, "Printer identity:", &id, resp_len);
id_len = ntohs(id.udp_identity_response.id_len) - sizeof(
id.udp_identity_response.id_len);
/* check id_len */
if ((id_len < 0) || (id_len > (resp_len - bjnp_header_size)) ||
(id_len > BJNP_IEEE1284_MAX)) {
bjnp_debug(LOG_ERROR,
"Id - length received is invalid: %d (total response length = %d\n",
id_len, resp_len);
return -1;
}
/* set IEEE1284_id */
if (printer_id != NULL) {
strncpy(printer_id, id.udp_identity_response.id, id_len);
printer_id[id_len] = '\0';
}
bjnp_debug(LOG_INFO, "Identity = %s\n", printer_id);
if (IEEE1284_id != NULL) {
strcpy(IEEE1284_id, printer_id);
}
/* get make&model from IEEE1284 id */
if (model != NULL) {
model[0] = '\0';
parse_IEEE1284_to_model(printer_id, model);
bjnp_debug(LOG_DEBUG, "Printer model = %s\n", model);
}
return 0;
}
int
bjnp_get_status(printer_t *printer, char *status_buf)
{
/*
* get printer status
*/
bjnp_command_t cmd;
bjnp_response_t response;
int resp_len;
uint32_t status_len;
/* set defaults */
clear_cmd(&cmd);
bjnp_printer_set_command_header(printer, &cmd, CMD_UDP_GET_STATUS,
sizeof(cmd.udp_get_status));
bjnp_hexdump(LOG_DEBUG2, "Get printer status", (char *) &cmd,
sizeof(cmd.udp_get_status));
resp_len =
bjnp_process_udp_command(&(printer->printer_sa), &cmd,
sizeof(cmd.udp_get_status),
&response);
if (resp_len <= 0) {
return BJNP_IO_ERROR;
}
bjnp_hexdump(LOG_DEBUG2, "Printer status:", &response, resp_len);
status_len = ntohl(response.udp_status_response.header.payload_len);
if (status_len >= BJNP_STATUS_MAX || status_len < 16) {
bjnp_debug(LOG_ERROR, "Get printer status: ERROR, invalid response length (%d)\n", status_len);
return BJNP_IO_ERROR;
}
if (status_len != (resp_len - sizeof(response.udp_status_response.header))) {
bjnp_debug(LOG_ERROR,
"status length (%d) does not match response length (%d)!!\n", status_len,
resp_len - sizeof(response.udp_status_response.header));
return BJNP_IO_ERROR;
}
/* check which version of the response we received */
if (strncmp(response.udp_status_response_v2.status, "<?xml", 5) == 0) {
/* version 2 of the status response */
response.udp_status_response_v2.status[status_len] = '\0';
strcpy(status_buf, response.udp_status_response_v2.status);
} else {
/* old format response message */
status_len = status_len - sizeof(response.udp_status_response.status_len);
response.udp_status_response.status[status_len] = '\0';
strcpy(status_buf, response.udp_status_response.status);
}
bjnp_debug(LOG_INFO, "Printer status: %s\n", status_buf);
return BJNP_OK;
}
int bjnp_send_job_details(http_addr_t *addr, const char *user, const char *title)
{
/*
* send details of printjob to printer
* Returns: 0 = ok, -1 = error
*/
char hostname[BJNP_HOST_MAX];
int resp_len;
bjnp_command_t cmd;
bjnp_response_t resp;
int session_id = 0;
/* send job details command */
clear_cmd(&cmd);
bjnp_defaults_set_command_header(&cmd, CMD_UDP_PRINT_JOB_DET,
sizeof(cmd.udp_job_details));
/* create payload */
gethostname(hostname, BJNP_HOST_MAX - 1);
charTo2byte(cmd.udp_job_details.unknown, "",
sizeof(cmd.udp_job_details.unknown));
charTo2byte(cmd.udp_job_details.hostname, hostname,
sizeof(cmd.udp_job_details.hostname));
charTo2byte(cmd.udp_job_details.username, user,
sizeof(cmd.udp_job_details.username));
charTo2byte(cmd.udp_job_details.jobtitle, title, sizeof(cmd.udp_job_details));
bjnp_hexdump(LOG_DEBUG2, "Job details", &cmd,
sizeof(cmd.udp_job_details));
resp_len = bjnp_process_udp_command(addr, &cmd, sizeof(cmd.udp_job_details),
&resp);
if (resp_len > 0) {
bjnp_hexdump(LOG_DEBUG2, "Job details response:", &resp,
resp_len);
session_id = ntohs(resp.udp_print_job_details_response.header.session_id);
return session_id;
}
return -1;
}
int bjnp_send_close(printer_t *printer)
{
/*
* Signal end of printjob to printer
*/
int resp_len;
bjnp_command_t cmd;
bjnp_response_t resp;
clear_cmd(&cmd);
bjnp_printer_set_command_header(printer, &cmd, CMD_UDP_CLOSE, sizeof(cmd.udp_close));
bjnp_hexdump(LOG_DEBUG2, "bjnp_send_close", (char *) &cmd,
sizeof(cmd.udp_close));
resp_len =
bjnp_process_udp_command(&(printer->printer_sa), &cmd, sizeof(cmd.udp_close),
&resp);
if (resp_len != sizeof(resp.udp_close_response)) {
bjnp_debug(LOG_CRIT,
"Received %d characters in close response, expected %d\n",
resp_len, sizeof(resp.udp_close_response));
return -1;
}
bjnp_hexdump(LOG_DEBUG2, "Finish printjob response", &resp, resp_len);
return 0;
}
|