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Improve Bluetooth device discovery support for Android and Microsoft devices.

Browse Source 
Tested using the virtual_bt_speaker(8) tool from the virtual_oss(8)
project at github.com.

PR:			210089
MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2019-02-08 13:10:45 +00:00
parent 1f0a97618b
commit 2d3a84f5b0
1 changed files with 127 additions and 1 deletions
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128
usr.sbin/bluetooth/sdpd/ssar.c
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@ -46,6 +46,131 @@ int32_t server_prepare_attr_list(provider_p const provider,
uint8_t const *req, uint8_t const * const req_end,
uint8_t *rsp, uint8_t const * const rsp_end);
/*
* Scan an attribute for matching UUID.
*/
static int
server_search_uuid_sub(uint8_t *buf, uint8_t const * const eob, const uint128_t *uuid)
{
int128_t duuid;
uint32_t value;
uint8_t type;
while (buf < eob) {
SDP_GET8(type, buf);
switch (type) {
case SDP_DATA_UUID16:
if (buf + 2 > eob)
continue;
SDP_GET16(value, buf);
memcpy(&duuid, &uuid_base, sizeof(duuid));
duuid.b[2] = value >> 8 & 0xff;
duuid.b[3] = value & 0xff;
if (memcmp(&duuid, uuid, sizeof(duuid)) == 0)
return (0);
break;
case SDP_DATA_UUID32:
if (buf + 4 > eob)
continue;
SDP_GET32(value, buf);
memcpy(&duuid, &uuid_base, sizeof(duuid));
duuid.b[0] = value >> 24 & 0xff;
duuid.b[1] = value >> 16 & 0xff;
duuid.b[2] = value >> 8 & 0xff;
duuid.b[3] = value & 0xff;
if (memcmp(&duuid, uuid, sizeof(duuid)) == 0)
return (0);
break;
case SDP_DATA_UUID128:
if (buf + 16 > eob)
continue;
SDP_GET_UUID128(&duuid, buf);
if (memcmp(&duuid, uuid, sizeof(duuid)) == 0)
return (0);
break;
case SDP_DATA_UINT8:
case SDP_DATA_INT8:
case SDP_DATA_SEQ8:
buf++;
break;
case SDP_DATA_UINT16:
case SDP_DATA_INT16:
case SDP_DATA_SEQ16:
buf += 2;
break;
case SDP_DATA_UINT32:
case SDP_DATA_INT32:
case SDP_DATA_SEQ32:
buf += 4;
break;
case SDP_DATA_UINT64:
case SDP_DATA_INT64:
buf += 8;
break;
case SDP_DATA_UINT128:
case SDP_DATA_INT128:
buf += 16;
break;
case SDP_DATA_STR8:
if (buf + 1 > eob)
continue;
SDP_GET8(value, buf);
buf += value;
break;
case SDP_DATA_STR16:
if (buf + 2 > eob)
continue;
SDP_GET16(value, buf);
if (value > (eob - buf))
return (1);
buf += value;
break;
case SDP_DATA_STR32:
if (buf + 4 > eob)
continue;
SDP_GET32(value, buf);
if (value > (eob - buf))
return (1);
buf += value;
break;
case SDP_DATA_BOOL:
buf += 1;
break;
default:
return (1);
}
}
return (1);
}
/*
* Search a provider for matching UUID in its attributes.
*/
static int
server_search_uuid(provider_p const provider, const uint128_t *uuid)
{
uint8_t buffer[256];
const attr_t *attr;
int len;
for (attr = provider->profile->attrs; attr->create != NULL; attr++) {
len = attr->create(buffer, buffer + sizeof(buffer),
(const uint8_t *)provider->profile, sizeof(*provider->profile));
if (len < 0)
continue;
if (server_search_uuid_sub(buffer, buffer + len, uuid) == 0)
return (0);
}
return (1);
}
/*
* Prepare SDP Service Search Attribute Response
*/
@ -225,7 +350,8 @@ server_prepare_service_search_attribute_response(server_p srv, int32_t fd)
puuid.b[3] = provider->profile->uuid;
if (memcmp(&uuid, &puuid, sizeof(uuid)) != 0 &&
memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) != 0)
memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) != 0 &&
server_search_uuid(provider, &uuid) != 0)
continue;
cs = server_prepare_attr_list(provider,