Add Bluetooth backend for CUPS

5 files changed, 778 insertions, 0 deletions

diff --git a/cups/Makefile.am b/cups/Makefile.am
new file mode 100644
index 00000000..2e4ba707
--- /dev/null
+++ b/cups/Makefile.am
@@ -0,0 +1,16 @@
+#
+#  $Id$
+#
+
+noinst_PROGRAMS = bluetooth
+
+bluetooth_SOURCES = main.c sdp.c spp.c hcrp.c
+
+LDFLAGS = @BLUEZ_LIBS@
+
+INCLUDES = @BLUEZ_INCLUDES@
+
+if CUPS
+install-data-local: bluetooth
+	$(INSTALL) -D -m 755 $(srcdir)/bluetooth $(DESTDIR)@CUPS_BACKEND_DIR@/bluetooth
+endif
diff --git a/cups/hcrp.c b/cups/hcrp.c
new file mode 100644
index 00000000..f69800a7
--- /dev/null
+++ b/cups/hcrp.c
@@ -0,0 +1,316 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2003-2004  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 version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+ *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+ *  SOFTWARE IS DISCLAIMED.
+ *
+ *
+ *  $Id$
+ */
+
+#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 <bluetooth/bluetooth.h>
+#include <bluetooth/l2cap.h>
+
+#include <netinet/in.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);
+	write(sk, buf, HCRP_PDU_HDR_SIZE + HCRP_CREDIT_GRANT_CP_SIZE);
+
+	len = read(sk, buf, sizeof(buf));
+	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);
+	write(sk, buf, HCRP_PDU_HDR_SIZE);
+
+	len = read(sk, buf, sizeof(buf));
+	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);
+	write(sk, buf, HCRP_PDU_HDR_SIZE);
+
+	len = read(sk, buf, sizeof(buf));
+	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)
+{
+	struct sockaddr_l2 addr;
+	struct l2cap_options opts;
+	unsigned char buf[2048];
+	int i, size, ctrl_sk, data_sk, mtu, count, len, timeout = 0;
+	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");
+		return 1;
+	}
+
+	addr.l2_family = AF_BLUETOOTH;
+	bacpy(&addr.l2_bdaddr, src);
+	addr.l2_psm = 0;
+
+	if (bind(ctrl_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("ERROR: Can't bind socket");
+		close(ctrl_sk);
+		return 1;
+	}
+
+	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);
+		return 1;
+	}
+
+	if ((data_sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0) {
+		perror("ERROR: Can't create socket");
+		close(ctrl_sk);
+		return 1;
+	}
+
+	addr.l2_family = AF_BLUETOOTH;
+	bacpy(&addr.l2_bdaddr, src);
+	addr.l2_psm = 0;
+
+	if (bind(data_sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("ERROR: Can't bind socket");
+		close(data_sk);
+		close(ctrl_sk);
+		return 1;
+	}
+
+	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);
+		return 1;
+	}
+
+	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);
+		return 1;
+	}
+
+	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);
+		return 1;
+	}
+
+	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 != count)
+				fprintf(stderr, "ERROR: Can't send complete data\n");
+
+			credit -= len;
+		}
+
+	}
+
+	close(data_sk);
+	close(ctrl_sk);
+
+	return 0;
+}
diff --git a/cups/main.c b/cups/main.c
new file mode 100644
index 00000000..352ea4ea
--- /dev/null
+++ b/cups/main.c
@@ -0,0 +1,188 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2003-2004  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 version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+ *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+ *  SOFTWARE IS DISCLAIMED.
+ *
+ *
+ *  $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/sdp.h>
+#include <bluetooth/sdp_lib.h>
+
+int sdp_search_spp(sdp_session_t *sdp, uint8_t *channel);
+int sdp_search_hcrp(sdp_session_t *sdp, unsigned short *ctrl_psm, unsigned short *data_psm);
+
+int spp_print(bdaddr_t *src, bdaddr_t *dst, uint8_t channel, int fd, int copies);
+int hcrp_print(bdaddr_t *src, bdaddr_t *dst, unsigned short ctrl_psm, unsigned short data_psm, int fd, int copies);
+
+static void list_devices(void)
+{
+}
+
+/*
+ *  Usage: printer-uri job-id user title copies options [file]
+ *
+ */
+
+int main(int argc, char *argv[])
+{
+	sdp_session_t *sdp;
+	bdaddr_t bdaddr;
+	unsigned short ctrl_psm, data_psm;
+	uint8_t channel, b[6];
+	char *ptr, str[3], device[18], service[12];
+	int i, err, fd, copies, proto;
+
+	/* Make sure status messages are not buffered */
+	setbuf(stderr, NULL);
+
+	/* Ignore SIGPIPE signals */
+#ifdef HAVE_SIGSET
+	sigset(SIGPIPE, SIG_IGN);
+#elif defined(HAVE_SIGACTION)
+	memset(&action, 0, sizeof(action));
+	action.sa_handler = SIG_IGN;
+	sigaction(SIGPIPE, &action, NULL);
+#else
+	signal(SIGPIPE, SIG_IGN);
+#endif /* HAVE_SIGSET */
+
+	if (argc == 1) {
+		list_devices();
+		return 0;
+	}
+
+	if (argc < 6 || argc > 7) {
+		fprintf(stderr, "Usage: bluetooth job-id user title copies options [file]\n");
+		return 1;
+	}
+
+	if (argc == 6) {
+		fd = 0;
+		copies = 1;
+	} else {
+		if ((fd = open(argv[6], O_RDONLY)) < 0) {
+			perror("ERROR: Unable to open print file");
+			return 1;
+		}
+		copies = atoi(argv[4]);
+	}
+
+	if (strncasecmp(argv[0], "bluetooth://", 12)) {
+		fprintf(stderr, "ERROR: No device URI found\n");
+		return 1;
+	}
+
+	ptr = argv[0] + 12;
+	for (i = 0; i < 6; i++) {
+		strncpy(str, ptr, 2);
+		b[i] = (uint8_t) strtol(str, NULL, 16);
+		ptr += 2;
+	}
+	sprintf(device, "%2.2X:%2.2X:%2.2X:%2.2X:%2.2X:%2.2X",
+		b[0], b[1], b[2], b[3], b[4], b[5]);
+
+	str2ba(device, &bdaddr);
+
+	ptr = strchr(ptr, '/');
+	if (ptr) {
+		strncpy(service, ptr + 1, 12);
+
+		if (!strncasecmp(ptr + 1, "spp", 3))
+			proto = 1;
+		else if (!strncasecmp(ptr + 1, "hcrp", 4))
+			proto = 2;
+		else
+			proto = 0;
+	} else {
+		strcpy(service, "auto");
+		proto = 0;
+	}
+
+	fprintf(stderr, "DEBUG: %s device %s service %s fd %d copies %d\n",
+			argv[0], device, service, fd, copies);
+
+	sdp = sdp_connect(BDADDR_ANY, &bdaddr, 0 /*SDP_RETRY_IF_BUSY*/);
+	if (!sdp) {
+		fprintf(stderr, "ERROR: Can't open Bluetooth connection\n");
+		return 1;
+	}
+
+	switch (proto) {
+	case 1:
+		err = sdp_search_spp(sdp, &channel);
+		break;
+	case 2:
+		err = sdp_search_hcrp(sdp, &ctrl_psm, &data_psm);
+		break;
+	default:
+		proto = 2;
+		err = sdp_search_hcrp(sdp, &ctrl_psm, &data_psm);
+		if (err) {
+			proto = 1;
+			err = sdp_search_spp(sdp, &channel);
+		}
+		break;
+	}
+
+	sdp_close(sdp);
+
+	if (err) {
+		fprintf(stderr, "ERROR: Can't get service information\n");
+		return 1;
+	}
+
+	switch (proto) {
+	case 1:
+		err = spp_print(BDADDR_ANY, &bdaddr, channel, fd, copies);
+		break;
+	case 2:
+		err = hcrp_print(BDADDR_ANY, &bdaddr, ctrl_psm, data_psm, fd, copies);
+		break;
+	default:
+		err = 1;
+		fprintf(stderr, "ERROR: Unsupported protocol\n");
+		break;
+	}
+
+	if (fd != 0)
+		close(fd);
+
+	if (!err)
+		fprintf(stderr, "INFO: Ready to print\n");
+
+	return err;
+}
diff --git a/cups/sdp.c b/cups/sdp.c
new file mode 100644
index 00000000..7491ab1f
--- /dev/null
+++ b/cups/sdp.c
@@ -0,0 +1,155 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2003-2004  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 version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+ *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+ *  SOFTWARE IS DISCLAIMED.
+ *
+ *
+ *  $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/socket.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/sdp.h>
+#include <bluetooth/sdp_lib.h>
+
+#define HCRP_CTRL_UUID		0x0012
+#define HCRP_DATA_UUID		0x0014
+
+#define HCR_PROFILE_ID		0x1125
+#define HCR_PRINT_SVCLASS_ID	0x1126
+
+#define SDP_ATTR_ADD_PROTO_DESC_LIST	0x000d
+
+static int sdp_get_add_access_protos(const sdp_record_t *rec, sdp_list_t **pap)
+{
+	sdp_data_t *pdlist, *curr;
+	sdp_list_t *ap = 0;
+
+	pdlist = sdp_data_get(rec, SDP_ATTR_ADD_PROTO_DESC_LIST);
+	if (pdlist == NULL) {
+		errno = ENODATA;
+		return -1;
+	}
+
+	pdlist = pdlist->val.dataseq;
+
+	for (; pdlist; pdlist = pdlist->next) {
+		sdp_list_t *pds = 0;
+		for (curr = pdlist->val.dataseq; curr; curr = curr->next)
+			pds = sdp_list_append(pds, curr->val.dataseq);
+		ap = sdp_list_append(ap, pds);
+	}
+
+	*pap = ap;
+
+	return 0;
+}
+
+int sdp_search_hcrp(sdp_session_t *sdp, unsigned short *ctrl_psm, unsigned short *data_psm)
+{
+	sdp_list_t *srch, *attrs, *rsp;
+	uuid_t svclass;
+	uint16_t attr1, attr2;
+	int err;
+
+	if (!sdp)
+		return -1;
+
+	sdp_uuid16_create(&svclass, HCR_PRINT_SVCLASS_ID);
+	srch = sdp_list_append(NULL, &svclass);
+
+	attr1 = SDP_ATTR_PROTO_DESC_LIST;
+	attrs = sdp_list_append(NULL, &attr1);
+	attr2 = SDP_ATTR_ADD_PROTO_DESC_LIST;
+	attrs = sdp_list_append(attrs, &attr2);
+
+	err = sdp_service_search_attr_req(sdp, srch, SDP_ATTR_REQ_INDIVIDUAL, attrs, &rsp);
+	if (err)
+		return -1;
+
+	for (; rsp; rsp = rsp->next) {
+		sdp_record_t *rec = (sdp_record_t *) rsp->data;
+		sdp_list_t *protos;
+
+		if (!sdp_get_access_protos(rec, &protos)) {
+			unsigned short psm = sdp_get_proto_port(protos, L2CAP_UUID);
+			if (psm > 0) {
+				*ctrl_psm = psm;
+			}
+		}
+
+		if (!sdp_get_add_access_protos(rec, &protos)) {
+			unsigned short psm = sdp_get_proto_port(protos, L2CAP_UUID);
+			if (psm > 0 && *ctrl_psm > 0) {
+				*data_psm = psm;
+				return 0;
+			}
+		}
+	}
+
+	return -1;
+}
+
+int sdp_search_spp(sdp_session_t *sdp, uint8_t *channel)
+{
+	sdp_list_t *srch, *attrs, *rsp;
+	uuid_t svclass;
+	uint16_t attr;
+	int err;
+
+	if (!sdp)
+		return -1;
+
+	sdp_uuid16_create(&svclass, SERIAL_PORT_SVCLASS_ID);
+	srch = sdp_list_append(NULL, &svclass);
+
+	attr = SDP_ATTR_PROTO_DESC_LIST;
+	attrs = sdp_list_append(NULL, &attr);
+
+	err = sdp_service_search_attr_req(sdp, srch, SDP_ATTR_REQ_INDIVIDUAL, attrs, &rsp);
+	if (err)
+		return -1;
+
+	for (; rsp; rsp = rsp->next) {
+		sdp_record_t *rec = (sdp_record_t *) rsp->data;
+		sdp_list_t *protos;
+
+		if (!sdp_get_access_protos(rec, &protos)) {
+			uint8_t ch = sdp_get_proto_port(protos, RFCOMM_UUID);
+			if (ch > 0) {
+				*channel = ch;
+				return 0;
+			}
+		}
+	}
+
+	return -1;
+}
diff --git a/cups/spp.c b/cups/spp.c
new file mode 100644
index 00000000..ec8fcdd5
--- /dev/null
+++ b/cups/spp.c
@@ -0,0 +1,103 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2003-2004  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 version 2 as
+ *  published by the Free Software Foundation;
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+ *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+ *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
+ *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
+ *  SOFTWARE IS DISCLAIMED.
+ *
+ *
+ *  $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/socket.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/rfcomm.h>
+
+int spp_print(bdaddr_t *src, bdaddr_t *dst, uint8_t channel, int fd, int copies)
+{
+	struct sockaddr_rc addr;
+	unsigned char buf[2048];
+	int i, sk, len;
+
+	if ((sk = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)) < 0) {
+		perror("ERROR: Can't create socket");
+		return 1;
+	}
+
+	addr.rc_family = AF_BLUETOOTH;
+	bacpy(&addr.rc_bdaddr, src);
+	addr.rc_channel = 0;
+
+	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("ERROR: Can't bind socket");
+		close(sk);
+		return 1;
+	}
+
+	addr.rc_family = AF_BLUETOOTH;
+	bacpy(&addr.rc_bdaddr, dst);
+	addr.rc_channel = channel;
+
+	if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+		perror("ERROR: Can't connect to device");
+		close(sk);
+		return 1;
+	}
+
+	/* 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 */
+	}
+
+	for (i = 0; i < copies; i++) {
+
+		if (fd != 0) {
+			fprintf(stderr, "PAGE: 1 1\n");
+			lseek(fd, 0, SEEK_SET);
+		}
+
+		while ((len = read(fd, buf, sizeof(buf))) > 0) {
+			write(sk, buf, len);
+		}
+
+	}
+
+	close(sk);
+
+	return 0;
+}