/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2003-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "lib/bluetooth.h"
#include "lib/l2cap.h"
#include "lib/sdp.h"
#include "lib/sdp_lib.h"
#include "cups.h"
#define HCRP_PDU_CREDIT_GRANT 0x0001
#define HCRP_PDU_CREDIT_REQUEST 0x0002
#define HCRP_PDU_GET_LPT_STATUS 0x0005
#define HCRP_STATUS_FEATURE_UNSUPPORTED 0x0000
#define HCRP_STATUS_SUCCESS 0x0001
#define HCRP_STATUS_CREDIT_SYNC_ERROR 0x0002
#define HCRP_STATUS_GENERIC_FAILURE 0xffff
struct hcrp_pdu_hdr {
uint16_t pid;
uint16_t tid;
uint16_t plen;
} __attribute__ ((packed));
#define HCRP_PDU_HDR_SIZE 6
struct hcrp_credit_grant_cp {
uint32_t credit;
} __attribute__ ((packed));
#define HCRP_CREDIT_GRANT_CP_SIZE 4
struct hcrp_credit_grant_rp {
uint16_t status;
} __attribute__ ((packed));
#define HCRP_CREDIT_GRANT_RP_SIZE 2
struct hcrp_credit_request_rp {
uint16_t status;
uint32_t credit;
} __attribute__ ((packed));
#define HCRP_CREDIT_REQUEST_RP_SIZE 6
struct hcrp_get_lpt_status_rp {
uint16_t status;
uint8_t lpt_status;
} __attribute__ ((packed));
#define HCRP_GET_LPT_STATUS_RP_SIZE 3
static int hcrp_credit_grant(int sk, uint16_t tid, uint32_t credit)
{
struct hcrp_pdu_hdr hdr;
struct hcrp_credit_grant_cp cp;
struct hcrp_credit_grant_rp rp;
unsigned char buf[128];
int len;
hdr.pid = htons(HCRP_PDU_CREDIT_GRANT);
hdr.tid = htons(tid);
hdr.plen = htons(HCRP_CREDIT_GRANT_CP_SIZE);
cp.credit = credit;
memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
memcpy(buf + HCRP_PDU_HDR_SIZE, &cp, HCRP_CREDIT_GRANT_CP_SIZE);
len = write(sk, buf, HCRP_PDU_HDR_SIZE + HCRP_CREDIT_GRANT_CP_SIZE);
if (len < 0)
return len;
len = read(sk, buf, sizeof(buf));
if (len < 0)
return len;
memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_CREDIT_GRANT_RP_SIZE);
if (ntohs(rp.status) != HCRP_STATUS_SUCCESS) {
errno = EIO;
return -1;
}
return 0;
}
static int hcrp_credit_request(int sk, uint16_t tid, uint32_t *credit)
{
struct hcrp_pdu_hdr hdr;
struct hcrp_credit_request_rp rp;
unsigned char buf[128];
int len;
hdr.pid = htons(HCRP_PDU_CREDIT_REQUEST);
hdr.tid = htons(tid);
hdr.plen = htons(0);
memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
len = write(sk, buf, HCRP_PDU_HDR_SIZE);
if (len < 0)
return len;
len = read(sk, buf, sizeof(buf));
if (len < 0)
return len;
memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_CREDIT_REQUEST_RP_SIZE);
if (ntohs(rp.status) != HCRP_STATUS_SUCCESS) {
errno = EIO;
return -1;
}
if (credit)
*credit = ntohl(rp.credit);
return 0;
}
static int hcrp_get_lpt_status(int sk, uint16_t tid, uint8_t *lpt_status)
{
struct hcrp_pdu_hdr hdr;
struct hcrp_get_lpt_status_rp rp;
unsigned char buf[128];
int len;
hdr.pid = htons(HCRP_PDU_GET_LPT_STATUS);
hdr.tid = htons(tid);
hdr.plen = htons(0);
memcpy(buf, &hdr, HCRP_PDU_HDR_SIZE);
len = write(sk, buf, HCRP_PDU_HDR_SIZE);
if (len < 0)
return len;
len = read(sk, buf, sizeof(buf));
if (len < 0)
return len;
memcpy(&hdr, buf, HCRP_PDU_HDR_SIZE);
memcpy(&rp, buf + HCRP_PDU_HDR_SIZE, HCRP_GET_LPT_STATUS_RP_SIZE);
if (ntohs(rp.status) != HCRP_STATUS_SUCCESS) {
errno = EIO;
return -1;
}
if (lpt_status)
*lpt_status = rp.lpt_status;
return 0;
}
static inline int hcrp_get_next_tid(int tid)
{
if (tid > 0xf000)
return 0;
else
return tid + 1;
}
int hcrp_print(bdaddr_t *src, bdaddr_t *dst, unsigned short ctrl_psm, unsigned short data_psm, int fd, int copies, const char *cups_class)
{
struct sockaddr_l2 addr;
struct l2cap_options opts;
socklen_t size;
unsigned char buf[2048];
int i, ctrl_sk, data_sk, count, len, timeout = 0;
unsigned int mtu;
uint8_t status;
uint16_t tid = 0;
uint32_t tmp, credit = 0;
if ((ctrl_sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0) {
perror("ERROR: Can't create socket");
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, src);
if (bind(ctrl_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("ERROR: Can't bind socket");
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, dst);
addr.l2_psm = htobs(ctrl_psm);
if (connect(ctrl_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("ERROR: Can't connect to device");
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
if ((data_sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0) {
perror("ERROR: Can't create socket");
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, src);
if (bind(data_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("ERROR: Can't bind socket");
close(data_sk);
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
memset(&addr, 0, sizeof(addr));
addr.l2_family = AF_BLUETOOTH;
bacpy(&addr.l2_bdaddr, dst);
addr.l2_psm = htobs(data_psm);
if (connect(data_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("ERROR: Can't connect to device");
close(data_sk);
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
fputs("STATE: -connecting-to-device\n", stderr);
memset(&opts, 0, sizeof(opts));
size = sizeof(opts);
if (getsockopt(data_sk, SOL_L2CAP, L2CAP_OPTIONS, &opts, &size) < 0) {
perror("ERROR: Can't get socket options");
close(data_sk);
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
mtu = opts.omtu;
/* Ignore SIGTERM signals if printing from stdin */
if (fd == 0) {
#ifdef HAVE_SIGSET
sigset(SIGTERM, SIG_IGN);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
action.sa_handler = SIG_IGN;
sigaction(SIGTERM, &action, NULL);
#else
signal(SIGTERM, SIG_IGN);
#endif /* HAVE_SIGSET */
}
tid = hcrp_get_next_tid(tid);
if (hcrp_credit_grant(ctrl_sk, tid, 0) < 0) {
fprintf(stderr, "ERROR: Can't grant initial credits\n");
close(data_sk);
close(ctrl_sk);
if (cups_class)
return CUPS_BACKEND_FAILED;
else
return CUPS_BACKEND_RETRY;
}
for (i = 0; i < copies; i++) {
if (fd != 0) {
fprintf(stderr, "PAGE: 1 1\n");
lseek(fd, 0, SEEK_SET);
}
while (1) {
if (credit < mtu) {
tid = hcrp_get_next_tid(tid);
if (!hcrp_credit_request(ctrl_sk, tid, &tmp)) {
credit += tmp;
timeout = 0;
}
}
if (!credit) {
if (timeout++ > 300) {
tid = hcrp_get_next_tid(tid);
if (!hcrp_get_lpt_status(ctrl_sk, tid, &status))
fprintf(stderr, "ERROR: LPT status 0x%02x\n", status);
break;
}
sleep(1);
continue;
}
count = read(fd, buf, (credit > mtu) ? mtu : credit);
if (count <= 0)
break;
len = write(data_sk, buf, count);
if (len < 0) {
perror("ERROR: Error writing to device");
close(data_sk);
close(ctrl_sk);
return CUPS_BACKEND_FAILED;
}
if (len != count)
fprintf(stderr, "ERROR: Can't send complete data\n");
credit -= len;
}
}
close(data_sk);
close(ctrl_sk);
return CUPS_BACKEND_OK;
}