1/* 2 * 3 * BlueZ - Bluetooth protocol stack for Linux 4 * 5 * Copyright (C) 2001-2002 Nokia Corporation 6 * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> 7 * Copyright (C) 2002-2009 Marcel Holtmann <marcel@holtmann.org> 8 * Copyright (C) 2002-2003 Stephen Crane <steve.crane@rococosoft.com> 9 * 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 24 * 25 */ 26 27#ifdef HAVE_CONFIG_H 28#include <config.h> 29#endif 30 31#include <stdio.h> 32#include <errno.h> 33#include <unistd.h> 34#include <stdlib.h> 35#include <sys/stat.h> 36#include <sys/socket.h> 37#include <cutils/sockets.h> 38 39#include <bluetooth/bluetooth.h> 40#include <bluetooth/l2cap.h> 41#include <bluetooth/sdp.h> 42#include <bluetooth/sdp_lib.h> 43 44#include <sys/un.h> 45#include <netinet/in.h> 46 47#include <glib.h> 48 49#include "logging.h" 50#include "sdpd.h" 51 52static GIOChannel *l2cap_io = NULL, *unix_io = NULL; 53 54static int l2cap_sock, unix_sock; 55 56/* 57 * SDP server initialization on startup includes creating the 58 * l2cap and unix sockets over which discovery and registration clients 59 * access us respectively 60 */ 61static int init_server(uint16_t mtu, int master, int compat) 62{ 63 struct l2cap_options opts; 64 struct sockaddr_l2 l2addr; 65 struct sockaddr_un unaddr; 66 socklen_t optlen; 67 68 /* Register the public browse group root */ 69 register_public_browse_group(); 70 71 /* Register the SDP server's service record */ 72 register_server_service(); 73 74 /* Create L2CAP socket */ 75 l2cap_sock = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP); 76 if (l2cap_sock < 0) { 77 error("opening L2CAP socket: %s", strerror(errno)); 78 return -1; 79 } 80 81 memset(&l2addr, 0, sizeof(l2addr)); 82 l2addr.l2_family = AF_BLUETOOTH; 83 bacpy(&l2addr.l2_bdaddr, BDADDR_ANY); 84 l2addr.l2_psm = htobs(SDP_PSM); 85 86 if (bind(l2cap_sock, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) { 87 error("binding L2CAP socket: %s", strerror(errno)); 88 return -1; 89 } 90 91 if (master) { 92 int opt = L2CAP_LM_MASTER; 93 if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_LM, &opt, sizeof(opt)) < 0) { 94 error("setsockopt: %s", strerror(errno)); 95 return -1; 96 } 97 } 98 99 if (mtu > 0) { 100 memset(&opts, 0, sizeof(opts)); 101 optlen = sizeof(opts); 102 103 if (getsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, &optlen) < 0) { 104 error("getsockopt: %s", strerror(errno)); 105 return -1; 106 } 107 108 opts.omtu = mtu; 109 opts.imtu = mtu; 110 111 if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts)) < 0) { 112 error("setsockopt: %s", strerror(errno)); 113 return -1; 114 } 115 } 116 117 listen(l2cap_sock, 5); 118 119 if (!compat) { 120 unix_sock = -1; 121 return 0; 122 } 123#if 0 124 /* Create local Unix socket */ 125 unix_sock = socket(PF_UNIX, SOCK_STREAM, 0); 126 if (unix_sock < 0) { 127 error("opening UNIX socket: %s", strerror(errno)); 128 return -1; 129 } 130 131 memset(&unaddr, 0, sizeof(unaddr)); 132 unaddr.sun_family = AF_UNIX; 133 strcpy(unaddr.sun_path, SDP_UNIX_PATH); 134 135 unlink(unaddr.sun_path); 136 137 if (bind(unix_sock, (struct sockaddr *) &unaddr, sizeof(unaddr)) < 0) { 138 error("binding UNIX socket: %s", strerror(errno)); 139 return -1; 140 } 141 142 listen(unix_sock, 5); 143 144 chmod(SDP_UNIX_PATH, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); 145#else 146 unix_sock = android_get_control_socket("bluetooth"); 147 if (unix_sock < 0) { 148 error("Unable to get the control socket for 'bluetooth'"); 149 return -1; 150 } 151 152 if (listen(unix_sock, 5)) { 153 error("Listening on local socket failed: %s", strerror(errno)); 154 return -1; 155 } 156 157 info("Got Unix socket fd '%d' from environment", unix_sock); 158#endif 159 160 return 0; 161} 162 163static gboolean io_session_event(GIOChannel *chan, GIOCondition cond, gpointer data) 164{ 165 sdp_pdu_hdr_t hdr; 166 uint8_t *buf; 167 int sk, len, size; 168 169 if (cond & G_IO_NVAL) 170 return FALSE; 171 172 sk = g_io_channel_unix_get_fd(chan); 173 174 if (cond & (G_IO_HUP | G_IO_ERR)) { 175 sdp_svcdb_collect_all(sk); 176 return FALSE; 177 } 178 179 len = recv(sk, &hdr, sizeof(sdp_pdu_hdr_t), MSG_PEEK); 180 if (len <= 0) { 181 sdp_svcdb_collect_all(sk); 182 return FALSE; 183 } 184 185 size = sizeof(sdp_pdu_hdr_t) + ntohs(hdr.plen); 186 buf = malloc(size); 187 if (!buf) 188 return TRUE; 189 190 len = recv(sk, buf, size, 0); 191 if (len <= 0) { 192 sdp_svcdb_collect_all(sk); 193 free(buf); 194 return FALSE; 195 } 196 197 handle_request(sk, buf, len); 198 199 return TRUE; 200} 201 202static gboolean io_accept_event(GIOChannel *chan, GIOCondition cond, gpointer data) 203{ 204 GIOChannel *io; 205 int nsk; 206 207 if (cond & (G_IO_HUP | G_IO_ERR | G_IO_NVAL)) { 208 g_io_channel_unref(chan); 209 return FALSE; 210 } 211 212 if (data == &l2cap_sock) { 213 struct sockaddr_l2 addr; 214 socklen_t len = sizeof(addr); 215 216 nsk = accept(l2cap_sock, (struct sockaddr *) &addr, &len); 217 } else if (data == &unix_sock) { 218 struct sockaddr_un addr; 219 socklen_t len = sizeof(addr); 220 221 nsk = accept(unix_sock, (struct sockaddr *) &addr, &len); 222 } else 223 return FALSE; 224 225 if (nsk < 0) { 226 error("Can't accept connection: %s", strerror(errno)); 227 return TRUE; 228 } 229 230 io = g_io_channel_unix_new(nsk); 231 g_io_channel_set_close_on_unref(io, TRUE); 232 233 g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, 234 io_session_event, data); 235 236 g_io_channel_unref(io); 237 238 return TRUE; 239} 240 241int start_sdp_server(uint16_t mtu, const char *did, uint32_t flags) 242{ 243 int compat = flags & SDP_SERVER_COMPAT; 244 int master = flags & SDP_SERVER_MASTER; 245 246 info("Starting SDP server"); 247 248 if (init_server(mtu, master, compat) < 0) { 249 error("Server initialization failed"); 250 return -1; 251 } 252 253 if (did && strlen(did) > 0) { 254 const char *ptr = did; 255 uint16_t vid = 0x0000, pid = 0x0000, ver = 0x0000; 256 257 vid = (uint16_t) strtol(ptr, NULL, 16); 258 ptr = strchr(ptr, ':'); 259 if (ptr) { 260 pid = (uint16_t) strtol(ptr + 1, NULL, 16); 261 ptr = strchr(ptr + 1, ':'); 262 if (ptr) 263 ver = (uint16_t) strtol(ptr + 1, NULL, 16); 264 register_device_id(vid, pid, ver); 265 } 266 } 267 268 l2cap_io = g_io_channel_unix_new(l2cap_sock); 269 g_io_channel_set_close_on_unref(l2cap_io, TRUE); 270 271 g_io_add_watch(l2cap_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, 272 io_accept_event, &l2cap_sock); 273 274 if (compat && unix_sock > fileno(stderr)) { 275 unix_io = g_io_channel_unix_new(unix_sock); 276 g_io_channel_set_close_on_unref(unix_io, TRUE); 277 278 g_io_add_watch(unix_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, 279 io_accept_event, &unix_sock); 280 } 281 282 return 0; 283} 284 285void stop_sdp_server(void) 286{ 287 info("Stopping SDP server"); 288 289 sdp_svcdb_reset(); 290 291 if (unix_io) 292 g_io_channel_unref(unix_io); 293 294 if (l2cap_io) 295 g_io_channel_unref(l2cap_io); 296} 297