.\" $NetBSD: sdp.3,v 1.1 2006/06/19 15:44:36 gdamore Exp $ .\" $DragonFly: src/lib/libsdp/sdp.3,v 1.1 2008/01/03 11:47:53 hasso Exp $ .\" .\" Copyright (c) 2003 Maksim Yevmenkin .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $Id: sdp.3,v 1.1 2006/06/19 15:44:36 gdamore Exp $ .\" $FreeBSD: src/lib/libsdp/sdp.3,v 1.10 2005/06/15 19:04:04 ru Exp $ .\" .Dd May 27, 2005 .Dt SDP 3 .Os .Sh NAME .Nm SDP_GET8 , .Nm SDP_GET16 , .Nm SDP_GET32 , .Nm SDP_GET64 , .Nm SDP_GET128 , .Nm SDP_GET_UUID128 , .Nm SDP_PUT8 , .Nm SDP_PUT16 , .Nm SDP_PUT32 , .Nm SDP_PUT64 , .Nm SDP_PUT128 , .Nm SDP_PUT_UUID128 , .Nm sdp_open , .Nm sdp_open_local , .Nm sdp_close , .Nm sdp_error , .Nm sdp_search , .Nm sdp_attr2desc , .Nm sdp_uuid2desc .Nd Bluetooth SDP routines .Sh LIBRARY .Lb libsdp .Sh SYNOPSIS .In bluetooth.h .In sdp.h .Fn SDP_GET8 "b" "cp" .Fn SDP_GET16 "s" "cp" .Fn SDP_GET32 "l" "cp" .Fn SDP_GET64 "l" "cp" .Fn SDP_GET128 "l" "cp" .Fn SDP_GET_UUID128 "l" "cp" .Fn SDP_PUT8 "b" "cp" .Fn SDP_PUT16 "s" "cp" .Fn SDP_PUT32 "l" "cp" .Fn SDP_PUT64 "l" "cp" .Fn SDP_PUT128 "l" "cp" .Fn SDP_PUT_UUID128 "l" "cp" .Ft "void *" .Fn sdp_open "bdaddr_t const *l" "bdaddr_t const *r" .Ft "void *" .Fn sdp_open_local "char const *control" .Ft int32_t .Fn sdp_close "void *xs" .Ft int32_t .Fn sdp_error "void *xs" .Ft int32_t .Fo sdp_search .Fa "void *xs" "uint32_t plen" "uint16_t const *pp" "uint32_t alen" .Fa "uint32_t const *ap" "uint32_t vlen" "sdp_attr_t *vp" .Fc .Ft "char const * const" .Fn sdp_attr2desc "uint16_t attr" .Ft "char const * const" .Fn sdp_uuid2desc "uint16_t uuid" .Ft int32_t .Fo sdp_register_service .Fa "void *xss" "uint16_t uuid" "bdaddr_t const *bdaddr" "uint8_t const *data" .Fa "uint32_t datalen" "uint32_t *handle" .Fc .Ft int32_t .Fn sdp_unregister_service "void *xss" "uint32_t handle" .Ft int32_t .Fo sdp_change_service .Fa "void *xss" "uint32_t handle" "uint8_t const *data" "uint32_t datalen" .Fc .Sh DESCRIPTION The .Fn SDP_GET8 , .Fn SDP_GET16 , .Fn SDP_GET32 , .Fn SDP_GET64 and .Fn SDP_GET128 macros are used to get byte, short, long, long long and 128-bit integer from the buffer pointed by .Fa cp pointer. The pointer is automatically advanced. .Pp The .Fn SDP_PUT8 , .Fn SDP_PUT16 , .Fn SDP_PUT32 , .Fn SDP_PUT64 and .Fn SDP_PUT128 macros are used to put byte, short, long, long long and 128-bit integer into the buffer pointed by .Fa cp pointer. The pointer is automatically advanced. .Pp .Fn SDP_GET_UUID128 and .Fn SDP_PUT_UUID128 macros are used to get and put 128-bit UUID into the buffer pointed by .Fa cp pointer. The pointer is automatically advanced. .Pp The .Fn sdp_open and .Fn sdp_open_local functions each return a pointer to an opaque object describing SDP session. The .Fa l argument passed to .Fn sdp_open function should point to a source BD_ADDR. If source BD_ADDR is .Dv NULL then source address .Dv BDADDR_ANY is used. The .Fa r argument passed to .Fn sdp_open function should point to a .Pf non- Dv NULL remote BD_ADDR. Remote BD_ADDR cannot be .Dv BDADDR_ANY . The .Fn sdp_open_local function takes path to the control socket and opens a connection to a local SDP server. If path to the control socket is .Dv NULL then default .Pa /var/run/sdp path will be used. .Pp The .Fn sdp_close function terminates active SDP session and deletes SDP session object. The .Fa xs parameter should point to a valid SDP session object created with .Fn sdp_open or .Fn sdp_open_local . .Pp The .Fn sdp_error function returns last error that is stored inside SDP session object. The .Fa xs parameter should point to a valid SDP session object created with .Fn sdp_open or .Fn sdp_open_local . The error value returned can be converted to a human readable message by calling .Xr strerror 3 function. .Pp The .Fn sdp_search function is used to perform SDP Service Search Attribute Request. The .Fa xs parameter should point to a valid SDP session object created with .Fn sdp_open or .Fn sdp_open_local . The .Fa pp parameter is a Service Search Pattern - an array of one or more Service Class IDs. The maximum number of Service Class IDs in the array is 12. The .Fa plen parameter is the length of the Service Search pattern. The .Fa ap parameter is an Attribute ID Range List - an array of one or more SDP Attribute ID Range. Each attribute ID Range is encoded as a 32-bit unsigned integer data element, where the high order 16 bits are interpreted as the beginning attribute ID of the range and the low order 16 bits are interpreted as the ending attribute ID of the range. The attribute IDs contained in the Attribute ID Ranges List must be listed in ascending order without duplication of any attribute ID values. Note that all attributes may be requested by specifying a range of 0x0000-0xFFFF. The .Fa alen parameter is the length of the Attribute ID Ranges List. The .Fn SDP_ATTR_RANGE "lo" "hi" macro can be used to prepare Attribute ID Range. The .Fa vp parameter should be an array of .Vt sdp_attr_t structures. Each .Vt sdp_attr_t structure describes single SDP attribute and defined as follows: .Bd -literal -offset indent struct sdp_attr { uint16_t flags; #define SDP_ATTR_OK (0 << 0) #define SDP_ATTR_INVALID (1 << 0) #define SDP_ATTR_TRUNCATED (1 << 1) uint16_t attr; /* SDP_ATTR_xxx */ uint32_t vlen; /* length of the value[] in bytes */ uint8_t *value; /* base pointer */ }; typedef struct sdp_attr sdp_attr_t; typedef struct sdp_attr * sdp_attr_p; .Ed .Pp The caller of the .Fn sdp_search function is expected to prepare the array of .Vt sdp_attr structures and for each element of the array both .Va vlen and .Va value must be set. The .Fn sdp_search function will fill each .Vt sdp_attr_t structure with attribute and value, i.e., it will set .Va flags , .Va attr and .Va vlen fields. The actual value of the attribute will be copied into .Va value buffer. Note: attributes are returned in the order they appear in the Service Search Attribute Response. SDP server could return several attributes for the same record. In this case the order of the attributes will be: all attributes for the first records, then all attributes for the secord record etc. .Pp The .Fn sdp_attr2desc and .Fn sdp_uuid2desc functions each take a numeric attribute ID/UUID value and convert it to a human readable description. .Pp The .Fn sdp_register_service function is used to register service with the local SDP server. The .Fa xss parameter should point to a valid SDP session object obtained from .Fn sdp_open_local . The .Fa uuid parameter is a SDP Service Class ID for the service to be registered. The .Fa bdaddr parameter should point to a valid BD_ADDR. The service will be only advertised if request was received by the local device with .Fa bdaddr . If .Fa bdaddr is set to .Dv BDADDR_ANY then the service will be advertised to any remote devices that queries for it. The .Fa data and .Fa datalen parameters specify data and size of the data for the service. Upon successful return .Fn sdp_register_service will populate .Fa handle with the SDP record handle. This parameter is optional and can be set to .Dv NULL . .Pp The .Fn sdp_unregister_service function is used to unregister service with the local SDP server. The .Fa xss parameter should point to a valid SDP session object obtained from .Fn sdp_open_local . The .Fa handle parameter should contain a valid SDP record handle of the service to be unregistered. .Pp The .Fn sdp_change_service function is used to change data associated with the existing service on the local SDP server. The .Fa xss parameter should point to a valid SDP session object obtained from .Fn sdp_open_local . The .Fa handle parameter should contain a valid SDP record handle of the service to be changed. The .Fa data and .Fa datalen parameters specify data and size of the data for the service. .Sh CAVEAT When registering services with the local SDP server the application must keep the SDP session open. If SDP session is closed then the local SDP server will remove all services that were registered over the session. The application is allowed to change or unregister service if it was registered over the same session. .Sh EXAMPLES The following example shows how to get .Dv SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST attribute for the .Dv SDP_SERVICE_CLASS_SERIAL_PORT service from the remote device. .Bd -literal -offset indent bdaddr_t remote; uint8_t buffer[1024]; void *ss = NULL; uint16_t serv = SDP_SERVICE_CLASS_SERIAL_PORT; uint32_t attr = SDP_ATTR_RANGE( SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST, SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST); sdp_attr_t proto = { SDP_ATTR_INVALID,0,sizeof(buffer),buffer }; /* Obtain/set remote BDADDR here */ if ((ss = sdp_open(BDADDR_ANY, remote)) == NULL) /* exit ENOMEM */ if (sdp_error(ss) != 0) /* exit sdp_error(ss) */ if (sdp_search(ss, 1, &serv, 1, &attr, 1, &proto) != 0) /* exit sdp_error(ss) */ if (proto.flags != SDP_ATTR_OK) /* exit see proto.flags for details */ /* If we got here then we have attribute value in proto.value */ .Ed .Sh DIAGNOSTICS Both .Fn sdp_open and .Fn sdp_open_local will return .Dv NULL if memory allocation for the new SDP session object fails. If the new SDP object was created then caller is still expected to call .Fn sdp_error to check if there was connection error. .Pp The .Fn sdp_search , .Fn sdp_register_service , .Fn sdp_unregister_service and .Fn sdp_change_service functions return non-zero value on error. The caller is expected to call .Fn sdp_error to find out more about error. .Sh SEE ALSO .Xr sdpquery 1 , .Xr strerror 3 , .Xr bluetooth 4 , .Xr sdpd 8 .Sh HISTORY .Nm libsdp first appeared in .Fx , was ported to .Nx 4.0 by .An Iain Hibbert and imported into .Dx 1.11 . .Sh AUTHORS .An Maksim Yevmenkin Aq m_evmenkin@yahoo.com .Sh BUGS Most likely. Please report bugs if found.