1124758Semax/* 2124758Semax * ssr.c 3124758Semax * 4124758Semax * Copyright (c) 2004 Maksim Yevmenkin <m_evmenkin@yahoo.com> 5124758Semax * All rights reserved. 6124758Semax * 7124758Semax * Redistribution and use in source and binary forms, with or without 8124758Semax * modification, are permitted provided that the following conditions 9124758Semax * are met: 10124758Semax * 1. Redistributions of source code must retain the above copyright 11124758Semax * notice, this list of conditions and the following disclaimer. 12124758Semax * 2. Redistributions in binary form must reproduce the above copyright 13124758Semax * notice, this list of conditions and the following disclaimer in the 14124758Semax * documentation and/or other materials provided with the distribution. 15124758Semax * 16124758Semax * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17124758Semax * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18124758Semax * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19124758Semax * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20124758Semax * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21124758Semax * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22124758Semax * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23124758Semax * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24124758Semax * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25124758Semax * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26124758Semax * SUCH DAMAGE. 27124758Semax * 28124758Semax * $Id: ssr.c,v 1.5 2004/01/13 01:54:39 max Exp $ 29124758Semax * $FreeBSD: releng/11.0/usr.sbin/bluetooth/sdpd/ssr.c 281210 2015-04-07 16:48:23Z takawata $ 30124758Semax */ 31124758Semax 32124758Semax#include <sys/queue.h> 33124758Semax#include <sys/uio.h> 34124758Semax#include <netinet/in.h> 35124758Semax#include <arpa/inet.h> 36124758Semax#include <assert.h> 37281210Stakawata#define L2CAP_SOCKET_CHECKED 38124758Semax#include <bluetooth.h> 39124758Semax#include <errno.h> 40124758Semax#include <sdp.h> 41124758Semax#include <string.h> 42124758Semax#include "profile.h" 43124758Semax#include "provider.h" 44124758Semax#include "server.h" 45139721Semax#include "uuid-private.h" 46124758Semax 47124758Semax/* 48124758Semax * Prepare SDP Service Search Response 49124758Semax */ 50124758Semax 51124758Semaxint32_t 52124758Semaxserver_prepare_service_search_response(server_p srv, int32_t fd) 53124758Semax{ 54124758Semax uint8_t const *req = srv->req + sizeof(sdp_pdu_t); 55124758Semax uint8_t const *req_end = req + ((sdp_pdu_p)(srv->req))->len; 56124758Semax uint8_t *rsp = srv->fdidx[fd].rsp; 57124758Semax uint8_t const *rsp_end = rsp + NG_L2CAP_MTU_MAXIMUM; 58124758Semax 59124758Semax uint8_t *ptr = NULL; 60124758Semax provider_t *provider = NULL; 61139721Semax int32_t type, ssplen, rsp_limit, rcount, cslen, cs; 62139721Semax uint128_t uuid, puuid; 63124758Semax 64124758Semax /* 65124758Semax * Minimal SDP Service Search Request 66124758Semax * 67124758Semax * seq8 len8 - 2 bytes 68124758Semax * uuid16 value16 - 3 bytes ServiceSearchPattern 69124758Semax * value16 - 2 bytes MaximumServiceRecordCount 70124758Semax * value8 - 1 byte ContinuationState 71124758Semax */ 72124758Semax 73124758Semax if (req_end - req < 8) 74124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 75124758Semax 76124758Semax /* Get size of ServiceSearchPattern */ 77124758Semax ssplen = 0; 78124758Semax SDP_GET8(type, req); 79124758Semax switch (type) { 80124758Semax case SDP_DATA_SEQ8: 81124758Semax SDP_GET8(ssplen, req); 82124758Semax break; 83124758Semax 84124758Semax case SDP_DATA_SEQ16: 85124758Semax SDP_GET16(ssplen, req); 86124758Semax break; 87124758Semax 88124758Semax case SDP_DATA_SEQ32: 89124758Semax SDP_GET32(ssplen, req); 90124758Semax break; 91124758Semax } 92124758Semax if (ssplen <= 0) 93124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 94124758Semax 95124758Semax ptr = (uint8_t *) req + ssplen; 96124758Semax 97124758Semax /* Get MaximumServiceRecordCount */ 98124758Semax if (ptr + 2 > req_end) 99124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 100124758Semax 101124758Semax SDP_GET16(rsp_limit, ptr); 102124758Semax if (rsp_limit <= 0) 103124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 104124758Semax 105124758Semax /* Get ContinuationState */ 106124758Semax if (ptr + 1 > req_end) 107124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 108124758Semax 109124758Semax SDP_GET8(cslen, ptr); 110124758Semax if (cslen != 0) { 111124758Semax if (cslen != 2 || req_end - ptr != 2) 112124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 113124758Semax 114124758Semax SDP_GET16(cs, ptr); 115124758Semax } else 116124758Semax cs = 0; 117124758Semax 118124758Semax /* Process the request. First, check continuation state */ 119124758Semax if (srv->fdidx[fd].rsp_cs != cs) 120124758Semax return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE); 121124758Semax if (srv->fdidx[fd].rsp_size > 0) 122124758Semax return (0); 123124758Semax 124124758Semax /* 125124758Semax * Service Search Response format 126124758Semax * 127124758Semax * value16 - 2 bytes TotalServiceRecordCount (not incl.) 128124758Semax * value16 - 2 bytes CurrentServiceRecordCount (not incl.) 129124758Semax * value32 - 4 bytes handle 130124758Semax * [ value32 ] 131124758Semax * 132124758Semax * Calculate how many record handles we can fit 133124758Semax * in our reply buffer and adjust rlimit. 134124758Semax */ 135124758Semax 136124758Semax ptr = rsp; 137124758Semax rcount = (rsp_end - ptr) / 4; 138124758Semax if (rcount < rsp_limit) 139124758Semax rsp_limit = rcount; 140124758Semax 141124758Semax /* Look for the record handles */ 142124758Semax for (rcount = 0; ssplen > 0 && rcount < rsp_limit; ) { 143124758Semax SDP_GET8(type, req); 144124758Semax ssplen --; 145124758Semax 146124758Semax switch (type) { 147124758Semax case SDP_DATA_UUID16: 148124758Semax if (ssplen < 2) 149124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 150124758Semax 151139721Semax memcpy(&uuid, &uuid_base, sizeof(uuid)); 152139721Semax uuid.b[2] = *req ++; 153139721Semax uuid.b[3] = *req ++; 154124758Semax ssplen -= 2; 155124758Semax break; 156124758Semax 157139721Semax case SDP_DATA_UUID32: 158139721Semax if (ssplen < 4) 159139721Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 160139721Semax 161139721Semax memcpy(&uuid, &uuid_base, sizeof(uuid)); 162139721Semax uuid.b[0] = *req ++; 163139721Semax uuid.b[1] = *req ++; 164139721Semax uuid.b[2] = *req ++; 165139721Semax uuid.b[3] = *req ++; 166139721Semax ssplen -= 4; 167139721Semax break; 168139721Semax 169139721Semax case SDP_DATA_UUID128: 170139721Semax if (ssplen < 16) 171139721Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 172139721Semax 173139721Semax memcpy(uuid.b, req, 16); 174139721Semax req += 16; 175139721Semax ssplen -= 16; 176139721Semax break; 177139721Semax 178124758Semax default: 179124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 180124758Semax /* NOT REACHED */ 181124758Semax } 182124758Semax 183124758Semax for (provider = provider_get_first(); 184124758Semax provider != NULL && rcount < rsp_limit; 185124758Semax provider = provider_get_next(provider)) { 186124758Semax if (!provider_match_bdaddr(provider, &srv->req_sa.l2cap_bdaddr)) 187124758Semax continue; 188124758Semax 189139721Semax memcpy(&puuid, &uuid_base, sizeof(puuid)); 190139721Semax puuid.b[2] = provider->profile->uuid >> 8; 191139721Semax puuid.b[3] = provider->profile->uuid; 192139721Semax 193139721Semax if (memcmp(&uuid, &puuid, sizeof(uuid)) == 0 || 194139721Semax memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) == 0) { 195124758Semax SDP_PUT32(provider->handle, ptr); 196124758Semax rcount ++; 197124758Semax } 198124758Semax } 199124758Semax } 200124758Semax 201124758Semax /* Set reply size (not counting PDU header and continuation state) */ 202124758Semax srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 4; 203124758Semax srv->fdidx[fd].rsp_size = ptr - rsp; 204124758Semax srv->fdidx[fd].rsp_cs = 0; 205124758Semax 206124758Semax return (0); 207124758Semax} 208124758Semax 209124758Semax/* 210124758Semax * Send SDP Service Search Response 211124758Semax */ 212124758Semax 213124758Semaxint32_t 214124758Semaxserver_send_service_search_response(server_p srv, int32_t fd) 215124758Semax{ 216124758Semax uint8_t *rsp = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_cs; 217124758Semax uint8_t *rsp_end = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_size; 218124758Semax 219124758Semax struct iovec iov[4]; 220124758Semax sdp_pdu_t pdu; 221124758Semax uint16_t rcounts[2]; 222124758Semax uint8_t cs[3]; 223124758Semax int32_t size; 224124758Semax 225124758Semax /* First update continuation state (assume we will send all data) */ 226124758Semax size = rsp_end - rsp; 227124758Semax srv->fdidx[fd].rsp_cs += size; 228124758Semax 229124758Semax if (size + 1 > srv->fdidx[fd].rsp_limit) { 230124758Semax /* 231124758Semax * We need to split out response. Add 3 more bytes for the 232124758Semax * continuation state and move rsp_end and rsp_cs backwards. 233124758Semax */ 234124758Semax 235124758Semax while ((rsp_end - rsp) + 3 > srv->fdidx[fd].rsp_limit) { 236124758Semax rsp_end -= 4; 237124758Semax srv->fdidx[fd].rsp_cs -= 4; 238124758Semax } 239124758Semax 240124758Semax cs[0] = 2; 241124758Semax cs[1] = srv->fdidx[fd].rsp_cs >> 8; 242124758Semax cs[2] = srv->fdidx[fd].rsp_cs & 0xff; 243124758Semax } else 244124758Semax cs[0] = 0; 245124758Semax 246124758Semax assert(rsp_end >= rsp); 247124758Semax 248124758Semax rcounts[0] = srv->fdidx[fd].rsp_size / 4; /* TotalServiceRecordCount */ 249124758Semax rcounts[1] = (rsp_end - rsp) / 4; /* CurrentServiceRecordCount */ 250124758Semax 251124758Semax pdu.pid = SDP_PDU_SERVICE_SEARCH_RESPONSE; 252124758Semax pdu.tid = ((sdp_pdu_p)(srv->req))->tid; 253124758Semax pdu.len = htons(sizeof(rcounts) + rcounts[1] * 4 + 1 + cs[0]); 254124758Semax 255126245Semax rcounts[0] = htons(rcounts[0]); 256126245Semax rcounts[1] = htons(rcounts[1]); 257126245Semax 258124758Semax iov[0].iov_base = &pdu; 259124758Semax iov[0].iov_len = sizeof(pdu); 260124758Semax 261124758Semax iov[1].iov_base = rcounts; 262124758Semax iov[1].iov_len = sizeof(rcounts); 263124758Semax 264124758Semax iov[2].iov_base = rsp; 265124758Semax iov[2].iov_len = rsp_end - rsp; 266124758Semax 267124758Semax iov[3].iov_base = cs; 268124758Semax iov[3].iov_len = 1 + cs[0]; 269124758Semax 270124758Semax do { 271124758Semax size = writev(fd, (struct iovec const *) &iov, sizeof(iov)/sizeof(iov[0])); 272124758Semax } while (size < 0 && errno == EINTR); 273124758Semax 274124758Semax /* Check if we have sent (or failed to sent) last response chunk */ 275124758Semax if (srv->fdidx[fd].rsp_cs == srv->fdidx[fd].rsp_size) { 276124758Semax srv->fdidx[fd].rsp_cs = 0; 277124758Semax srv->fdidx[fd].rsp_size = 0; 278124758Semax srv->fdidx[fd].rsp_limit = 0; 279124758Semax } 280124758Semax 281124758Semax return ((size < 0)? errno : 0); 282124758Semax} 283124758Semax 284