int32_t
server_prepare_service_register_response(server_p srv, int32_t fd)
{
uint8_t const *req = srv->req + sizeof(sdp_pdu_t);
uint8_t const *req_end = req + ((sdp_pdu_p)(srv->req))->len;
uint8_t *rsp = srv->fdidx[fd].rsp;
profile_t *profile = NULL;
provider_t *provider = NULL;
bdaddr_t const *bdaddr = NULL;
int32_t uuid;
/*
* Minimal Service Register Request
*
* value16 - uuid 2 bytes
* bdaddr - BD_ADDR 6 bytes
*/
if (!srv->fdidx[fd].control ||
!srv->fdidx[fd].priv || req_end - req < 8)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* Get ServiceClass UUID */
SDP_GET16(uuid, req);
/* Get BD_ADDR */
bdaddr = (bdaddr_t const *) req;
req += sizeof(*bdaddr);
/* Lookup profile descriptror */
profile = profile_get_descriptor(uuid);
if (profile == NULL)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* Validate user data */
if (req_end - req < profile->dsize ||
profile->valid == NULL ||
(profile->valid)(req, req_end - req) == 0)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* Register provider */
provider = provider_register(profile, bdaddr, fd, req, req_end - req);
if (provider == NULL)
return (SDP_ERROR_CODE_INSUFFICIENT_RESOURCES);
SDP_PUT16(0, rsp);
SDP_PUT32(provider->handle, rsp);
/* Set reply size */
srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t);
srv->fdidx[fd].rsp_size = rsp - srv->fdidx[fd].rsp;
srv->fdidx[fd].rsp_cs = 0;
return (0);
}
int32_t
common_profile_create_service_record_handle(
uint8_t *buf, uint8_t const * const eob,
uint8_t const *data, uint32_t datalen)
{
if (buf + 5 > eob)
return (-1);
SDP_PUT8(SDP_DATA_UINT32, buf);
SDP_PUT32(((provider_p) data)->handle, buf);
return (5);
}
static int32_t
sd_profile_create_service_database_state(
uint8_t *buf, uint8_t const * const eob,
uint8_t const *data, uint32_t datalen)
{
uint32_t change_state = provider_get_change_state();
if (buf + 5 > eob)
return (-1);
SDP_PUT8(SDP_DATA_UINT32, buf);
SDP_PUT32(change_state, buf);
return (5);
}
int32_t
server_prepare_service_search_response(server_p srv, int32_t fd)
{
uint8_t const *req = srv->req + sizeof(sdp_pdu_t);
uint8_t const *req_end = req + ((sdp_pdu_p)(srv->req))->len;
uint8_t *rsp = srv->fdidx[fd].rsp;
uint8_t const *rsp_end = rsp + NG_L2CAP_MTU_MAXIMUM;
uint8_t *ptr = NULL;
provider_t *provider = NULL;
int32_t type, ssplen, rsp_limit, rcount, cslen, cs;
uint128_t uuid, puuid;
/*
* Minimal SDP Service Search Request
*
* seq8 len8 - 2 bytes
* uuid16 value16 - 3 bytes ServiceSearchPattern
* value16 - 2 bytes MaximumServiceRecordCount
* value8 - 1 byte ContinuationState
*/
if (req_end - req < 8)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* Get size of ServiceSearchPattern */
ssplen = 0;
SDP_GET8(type, req);
switch (type) {
case SDP_DATA_SEQ8:
SDP_GET8(ssplen, req);
break;
case SDP_DATA_SEQ16:
SDP_GET16(ssplen, req);
break;
case SDP_DATA_SEQ32:
SDP_GET32(ssplen, req);
break;
}
if (ssplen <= 0)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
ptr = (uint8_t *) req + ssplen;
/* Get MaximumServiceRecordCount */
if (ptr + 2 > req_end)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
SDP_GET16(rsp_limit, ptr);
if (rsp_limit <= 0)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* Get ContinuationState */
if (ptr + 1 > req_end)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
SDP_GET8(cslen, ptr);
if (cslen != 0) {
if (cslen != 2 || req_end - ptr != 2)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
SDP_GET16(cs, ptr);
} else
cs = 0;
/* Process the request. First, check continuation state */
if (srv->fdidx[fd].rsp_cs != cs)
return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE);
if (srv->fdidx[fd].rsp_size > 0)
return (0);
/*
* Service Search Response format
*
* value16 - 2 bytes TotalServiceRecordCount (not incl.)
* value16 - 2 bytes CurrentServiceRecordCount (not incl.)
* value32 - 4 bytes handle
* [ value32 ]
*
* Calculate how many record handles we can fit
* in our reply buffer and adjust rlimit.
*/
ptr = rsp;
rcount = (rsp_end - ptr) / 4;
if (rcount < rsp_limit)
rsp_limit = rcount;
/* Look for the record handles */
for (rcount = 0; ssplen > 0 && rcount < rsp_limit; ) {
SDP_GET8(type, req);
ssplen --;
switch (type) {
case SDP_DATA_UUID16:
if (ssplen < 2)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
memcpy(&uuid, &uuid_base, sizeof(uuid));
uuid.b[2] = *req ++;
uuid.b[3] = *req ++;
ssplen -= 2;
break;
case SDP_DATA_UUID32:
if (ssplen < 4)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
memcpy(&uuid, &uuid_base, sizeof(uuid));
uuid.b[0] = *req ++;
uuid.b[1] = *req ++;
uuid.b[2] = *req ++;
uuid.b[3] = *req ++;
ssplen -= 4;
break;
case SDP_DATA_UUID128:
if (ssplen < 16)
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
memcpy(uuid.b, req, 16);
req += 16;
ssplen -= 16;
break;
default:
return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX);
/* NOT REACHED */
}
for (provider = provider_get_first();
provider != NULL && rcount < rsp_limit;
provider = provider_get_next(provider)) {
if (!provider_match_bdaddr(provider, &srv->req_sa.l2cap_bdaddr))
continue;
memcpy(&puuid, &uuid_base, sizeof(puuid));
puuid.b[2] = provider->profile->uuid >> 8;
puuid.b[3] = provider->profile->uuid;
if (memcmp(&uuid, &puuid, sizeof(uuid)) == 0 ||
memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) == 0) {
SDP_PUT32(provider->handle, ptr);
rcount ++;
}
}
}
/* Set reply size (not counting PDU header and continuation state) */
srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 4;
srv->fdidx[fd].rsp_size = ptr - rsp;
srv->fdidx[fd].rsp_cs = 0;
return (0);
}
