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 * $FreeBSD$ 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> 37124758Semax#include <bluetooth.h> 38124758Semax#include <errno.h> 39124758Semax#include <sdp.h> 40124758Semax#include <string.h> 41124758Semax#include "profile.h" 42124758Semax#include "provider.h" 43124758Semax#include "server.h" 44139721Semax#include "uuid-private.h" 45124758Semax 46124758Semax/* 47124758Semax * Prepare SDP Service Search Response 48124758Semax */ 49124758Semax 50124758Semaxint32_t 51124758Semaxserver_prepare_service_search_response(server_p srv, int32_t fd) 52124758Semax{ 53124758Semax uint8_t const *req = srv->req + sizeof(sdp_pdu_t); 54124758Semax uint8_t const *req_end = req + ((sdp_pdu_p)(srv->req))->len; 55124758Semax uint8_t *rsp = srv->fdidx[fd].rsp; 56124758Semax uint8_t const *rsp_end = rsp + NG_L2CAP_MTU_MAXIMUM; 57124758Semax 58124758Semax uint8_t *ptr = NULL; 59124758Semax provider_t *provider = NULL; 60139721Semax int32_t type, ssplen, rsp_limit, rcount, cslen, cs; 61139721Semax uint128_t uuid, puuid; 62124758Semax 63124758Semax /* 64124758Semax * Minimal SDP Service Search Request 65124758Semax * 66124758Semax * seq8 len8 - 2 bytes 67124758Semax * uuid16 value16 - 3 bytes ServiceSearchPattern 68124758Semax * value16 - 2 bytes MaximumServiceRecordCount 69124758Semax * value8 - 1 byte ContinuationState 70124758Semax */ 71124758Semax 72124758Semax if (req_end - req < 8) 73124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 74124758Semax 75124758Semax /* Get size of ServiceSearchPattern */ 76124758Semax ssplen = 0; 77124758Semax SDP_GET8(type, req); 78124758Semax switch (type) { 79124758Semax case SDP_DATA_SEQ8: 80124758Semax SDP_GET8(ssplen, req); 81124758Semax break; 82124758Semax 83124758Semax case SDP_DATA_SEQ16: 84124758Semax SDP_GET16(ssplen, req); 85124758Semax break; 86124758Semax 87124758Semax case SDP_DATA_SEQ32: 88124758Semax SDP_GET32(ssplen, req); 89124758Semax break; 90124758Semax } 91124758Semax if (ssplen <= 0) 92124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 93124758Semax 94124758Semax ptr = (uint8_t *) req + ssplen; 95124758Semax 96124758Semax /* Get MaximumServiceRecordCount */ 97124758Semax if (ptr + 2 > req_end) 98124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 99124758Semax 100124758Semax SDP_GET16(rsp_limit, ptr); 101124758Semax if (rsp_limit <= 0) 102124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 103124758Semax 104124758Semax /* Get ContinuationState */ 105124758Semax if (ptr + 1 > req_end) 106124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 107124758Semax 108124758Semax SDP_GET8(cslen, ptr); 109124758Semax if (cslen != 0) { 110124758Semax if (cslen != 2 || req_end - ptr != 2) 111124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 112124758Semax 113124758Semax SDP_GET16(cs, ptr); 114124758Semax } else 115124758Semax cs = 0; 116124758Semax 117124758Semax /* Process the request. First, check continuation state */ 118124758Semax if (srv->fdidx[fd].rsp_cs != cs) 119124758Semax return (SDP_ERROR_CODE_INVALID_CONTINUATION_STATE); 120124758Semax if (srv->fdidx[fd].rsp_size > 0) 121124758Semax return (0); 122124758Semax 123124758Semax /* 124124758Semax * Service Search Response format 125124758Semax * 126124758Semax * value16 - 2 bytes TotalServiceRecordCount (not incl.) 127124758Semax * value16 - 2 bytes CurrentServiceRecordCount (not incl.) 128124758Semax * value32 - 4 bytes handle 129124758Semax * [ value32 ] 130124758Semax * 131124758Semax * Calculate how many record handles we can fit 132124758Semax * in our reply buffer and adjust rlimit. 133124758Semax */ 134124758Semax 135124758Semax ptr = rsp; 136124758Semax rcount = (rsp_end - ptr) / 4; 137124758Semax if (rcount < rsp_limit) 138124758Semax rsp_limit = rcount; 139124758Semax 140124758Semax /* Look for the record handles */ 141124758Semax for (rcount = 0; ssplen > 0 && rcount < rsp_limit; ) { 142124758Semax SDP_GET8(type, req); 143124758Semax ssplen --; 144124758Semax 145124758Semax switch (type) { 146124758Semax case SDP_DATA_UUID16: 147124758Semax if (ssplen < 2) 148124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 149124758Semax 150139721Semax memcpy(&uuid, &uuid_base, sizeof(uuid)); 151139721Semax uuid.b[2] = *req ++; 152139721Semax uuid.b[3] = *req ++; 153124758Semax ssplen -= 2; 154124758Semax break; 155124758Semax 156139721Semax case SDP_DATA_UUID32: 157139721Semax if (ssplen < 4) 158139721Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 159139721Semax 160139721Semax memcpy(&uuid, &uuid_base, sizeof(uuid)); 161139721Semax uuid.b[0] = *req ++; 162139721Semax uuid.b[1] = *req ++; 163139721Semax uuid.b[2] = *req ++; 164139721Semax uuid.b[3] = *req ++; 165139721Semax ssplen -= 4; 166139721Semax break; 167139721Semax 168139721Semax case SDP_DATA_UUID128: 169139721Semax if (ssplen < 16) 170139721Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 171139721Semax 172139721Semax memcpy(uuid.b, req, 16); 173139721Semax req += 16; 174139721Semax ssplen -= 16; 175139721Semax break; 176139721Semax 177124758Semax default: 178124758Semax return (SDP_ERROR_CODE_INVALID_REQUEST_SYNTAX); 179124758Semax /* NOT REACHED */ 180124758Semax } 181124758Semax 182124758Semax for (provider = provider_get_first(); 183124758Semax provider != NULL && rcount < rsp_limit; 184124758Semax provider = provider_get_next(provider)) { 185124758Semax if (!provider_match_bdaddr(provider, &srv->req_sa.l2cap_bdaddr)) 186124758Semax continue; 187124758Semax 188139721Semax memcpy(&puuid, &uuid_base, sizeof(puuid)); 189139721Semax puuid.b[2] = provider->profile->uuid >> 8; 190139721Semax puuid.b[3] = provider->profile->uuid; 191139721Semax 192139721Semax if (memcmp(&uuid, &puuid, sizeof(uuid)) == 0 || 193139721Semax memcmp(&uuid, &uuid_public_browse_group, sizeof(uuid)) == 0) { 194124758Semax SDP_PUT32(provider->handle, ptr); 195124758Semax rcount ++; 196124758Semax } 197124758Semax } 198124758Semax } 199124758Semax 200124758Semax /* Set reply size (not counting PDU header and continuation state) */ 201124758Semax srv->fdidx[fd].rsp_limit = srv->fdidx[fd].omtu - sizeof(sdp_pdu_t) - 4; 202124758Semax srv->fdidx[fd].rsp_size = ptr - rsp; 203124758Semax srv->fdidx[fd].rsp_cs = 0; 204124758Semax 205124758Semax return (0); 206124758Semax} 207124758Semax 208124758Semax/* 209124758Semax * Send SDP Service Search Response 210124758Semax */ 211124758Semax 212124758Semaxint32_t 213124758Semaxserver_send_service_search_response(server_p srv, int32_t fd) 214124758Semax{ 215124758Semax uint8_t *rsp = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_cs; 216124758Semax uint8_t *rsp_end = srv->fdidx[fd].rsp + srv->fdidx[fd].rsp_size; 217124758Semax 218124758Semax struct iovec iov[4]; 219124758Semax sdp_pdu_t pdu; 220124758Semax uint16_t rcounts[2]; 221124758Semax uint8_t cs[3]; 222124758Semax int32_t size; 223124758Semax 224124758Semax /* First update continuation state (assume we will send all data) */ 225124758Semax size = rsp_end - rsp; 226124758Semax srv->fdidx[fd].rsp_cs += size; 227124758Semax 228124758Semax if (size + 1 > srv->fdidx[fd].rsp_limit) { 229124758Semax /* 230124758Semax * We need to split out response. Add 3 more bytes for the 231124758Semax * continuation state and move rsp_end and rsp_cs backwards. 232124758Semax */ 233124758Semax 234124758Semax while ((rsp_end - rsp) + 3 > srv->fdidx[fd].rsp_limit) { 235124758Semax rsp_end -= 4; 236124758Semax srv->fdidx[fd].rsp_cs -= 4; 237124758Semax } 238124758Semax 239124758Semax cs[0] = 2; 240124758Semax cs[1] = srv->fdidx[fd].rsp_cs >> 8; 241124758Semax cs[2] = srv->fdidx[fd].rsp_cs & 0xff; 242124758Semax } else 243124758Semax cs[0] = 0; 244124758Semax 245124758Semax assert(rsp_end >= rsp); 246124758Semax 247124758Semax rcounts[0] = srv->fdidx[fd].rsp_size / 4; /* TotalServiceRecordCount */ 248124758Semax rcounts[1] = (rsp_end - rsp) / 4; /* CurrentServiceRecordCount */ 249124758Semax 250124758Semax pdu.pid = SDP_PDU_SERVICE_SEARCH_RESPONSE; 251124758Semax pdu.tid = ((sdp_pdu_p)(srv->req))->tid; 252124758Semax pdu.len = htons(sizeof(rcounts) + rcounts[1] * 4 + 1 + cs[0]); 253124758Semax 254126245Semax rcounts[0] = htons(rcounts[0]); 255126245Semax rcounts[1] = htons(rcounts[1]); 256126245Semax 257124758Semax iov[0].iov_base = &pdu; 258124758Semax iov[0].iov_len = sizeof(pdu); 259124758Semax 260124758Semax iov[1].iov_base = rcounts; 261124758Semax iov[1].iov_len = sizeof(rcounts); 262124758Semax 263124758Semax iov[2].iov_base = rsp; 264124758Semax iov[2].iov_len = rsp_end - rsp; 265124758Semax 266124758Semax iov[3].iov_base = cs; 267124758Semax iov[3].iov_len = 1 + cs[0]; 268124758Semax 269124758Semax do { 270124758Semax size = writev(fd, (struct iovec const *) &iov, sizeof(iov)/sizeof(iov[0])); 271124758Semax } while (size < 0 && errno == EINTR); 272124758Semax 273124758Semax /* Check if we have sent (or failed to sent) last response chunk */ 274124758Semax if (srv->fdidx[fd].rsp_cs == srv->fdidx[fd].rsp_size) { 275124758Semax srv->fdidx[fd].rsp_cs = 0; 276124758Semax srv->fdidx[fd].rsp_size = 0; 277124758Semax srv->fdidx[fd].rsp_limit = 0; 278124758Semax } 279124758Semax 280124758Semax return ((size < 0)? errno : 0); 281124758Semax} 282124758Semax 283