1188013Semax/* $NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $ */ 2187938Semax 3187938Semax/*- 4330449Seadler * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5330449Seadler * 6187938Semax * Copyright (c) 2008 Iain Hibbert 7187938Semax * All rights reserved. 8187938Semax * 9187938Semax * Redistribution and use in source and binary forms, with or without 10187938Semax * modification, are permitted provided that the following conditions 11187938Semax * are met: 12187938Semax * 1. Redistributions of source code must retain the above copyright 13187938Semax * notice, this list of conditions and the following disclaimer. 14187938Semax * 2. Redistributions in binary form must reproduce the above copyright 15187938Semax * notice, this list of conditions and the following disclaimer in the 16187938Semax * documentation and/or other materials provided with the distribution. 17187938Semax * 18187938Semax * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19187938Semax * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20187938Semax * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21187938Semax * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22187938Semax * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23187938Semax * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24187938Semax * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25187938Semax * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26187938Semax * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27187938Semax * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28187938Semax */ 29187938Semax 30187938Semax/* $FreeBSD: stable/11/usr.sbin/bluetooth/btpand/server.c 330449 2018-03-05 07:26:05Z eadler $ */ 31187938Semax 32187938Semax#include <sys/cdefs.h> 33188013Semax__RCSID("$NetBSD: server.c,v 1.2 2009/01/24 17:29:28 plunky Exp $"); 34187938Semax 35187938Semax#include <sys/ioctl.h> 36187938Semax 37281210Stakawata#define L2CAP_SOCKET_CHECKED 38187938Semax#include <bluetooth.h> 39188013Semax#include <inttypes.h> 40187938Semax#include <errno.h> 41187938Semax#include <sdp.h> 42187938Semax#include <unistd.h> 43187938Semax 44187938Semax#include "btpand.h" 45187938Semax#include "bnep.h" 46187938Semax 47187938Semaxstatic struct event server_ev; 48187938Semaxstatic int server_fd; 49188013Semaxstatic int server_avail; 50187938Semax 51187938Semaxstatic void * server_ss; 52187938Semaxstatic uint32_t server_handle; 53187938Semax 54187938Semaxstatic void server_open(void); 55187938Semaxstatic void server_close(void); 56187938Semaxstatic void server_read(int, short, void *); 57187938Semaxstatic void server_register(void); 58187938Semax 59187938Semaxvoid 60187938Semaxserver_init(void) 61187938Semax{ 62187938Semax 63187938Semax server_fd = -1; 64187938Semax} 65187938Semax 66187938Semax/* 67187938Semax * The server_update() function is called whenever the channel count is 68187938Semax * changed. We maintain the SDP record and open or close the server socket 69187938Semax * as required. 70187938Semax */ 71187938Semaxvoid 72187938Semaxserver_update(int count) 73187938Semax{ 74187938Semax 75187938Semax if (server_limit == 0) 76187938Semax return; 77187938Semax 78187938Semax log_debug("count %d", count); 79187938Semax 80188013Semax server_avail = UINT8_MAX - (count - 1) * UINT8_MAX / server_limit; 81188013Semax log_info("Service Availability: %d/%d", server_avail, UINT8_MAX); 82187938Semax 83188013Semax if (server_avail == 0 && server_fd != -1) 84187938Semax server_close(); 85187938Semax 86188013Semax if (server_avail > 0 && server_fd == -1) 87187938Semax server_open(); 88187938Semax 89187938Semax if (service_name) 90187938Semax server_register(); 91187938Semax} 92187938Semax 93187938Semaxstatic void 94187938Semaxserver_open(void) 95187938Semax{ 96187938Semax struct sockaddr_l2cap sa; 97187938Semax uint16_t mru; 98187938Semax 99187938Semax server_fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP); 100187938Semax if (server_fd == -1) { 101187938Semax log_err("Could not open L2CAP socket: %m"); 102187938Semax exit(EXIT_FAILURE); 103187938Semax } 104187938Semax 105187938Semax memset(&sa, 0, sizeof(sa)); 106187938Semax sa.l2cap_family = AF_BLUETOOTH; 107187938Semax sa.l2cap_len = sizeof(sa); 108187938Semax sa.l2cap_psm = htole16(l2cap_psm); 109281210Stakawata sa.l2cap_bdaddr_type = BDADDR_BREDR; 110281210Stakawata sa.l2cap_cid = 0; 111281210Stakawata 112187938Semax bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr); 113187938Semax if (bind(server_fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { 114187938Semax log_err("Could not bind server socket: %m"); 115187938Semax exit(EXIT_FAILURE); 116187938Semax } 117187938Semax 118187938Semax mru = BNEP_MTU_MIN; 119187938Semax if (setsockopt(server_fd, SOL_L2CAP, 120187938Semax SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) { 121187938Semax log_err("Could not set L2CAP IMTU (%d): %m", mru); 122187938Semax exit(EXIT_FAILURE); 123187938Semax } 124187938Semax 125187938Semax if (listen(server_fd, 0) == -1) { 126187938Semax log_err("Could not listen on server socket: %m"); 127187938Semax exit(EXIT_FAILURE); 128187938Semax } 129187938Semax 130187938Semax event_set(&server_ev, server_fd, EV_READ | EV_PERSIST, server_read, NULL); 131187938Semax if (event_add(&server_ev, NULL) == -1) { 132187938Semax log_err("Could not add server event: %m"); 133187938Semax exit(EXIT_FAILURE); 134187938Semax } 135187938Semax 136187938Semax log_info("server socket open"); 137187938Semax} 138187938Semax 139187938Semaxstatic void 140187938Semaxserver_close(void) 141187938Semax{ 142187938Semax 143187938Semax event_del(&server_ev); 144187938Semax close(server_fd); 145187938Semax server_fd = -1; 146187938Semax 147187938Semax log_info("server socket closed"); 148187938Semax} 149187938Semax 150187938Semax/* 151187938Semax * handle connection request 152187938Semax */ 153187938Semaxstatic void 154187938Semaxserver_read(int s, short ev, void *arg) 155187938Semax{ 156187938Semax struct sockaddr_l2cap ra, la; 157187938Semax channel_t *chan; 158187938Semax socklen_t len; 159187938Semax int fd, n; 160187938Semax uint16_t mru, mtu; 161187938Semax 162187938Semax len = sizeof(ra); 163187938Semax fd = accept(s, (struct sockaddr *)&ra, &len); 164187938Semax if (fd == -1) 165187938Semax return; 166187938Semax 167187938Semax n = 1; 168187938Semax if (ioctl(fd, FIONBIO, &n) == -1) { 169187938Semax log_err("Could not set NonBlocking IO: %m"); 170187938Semax close(fd); 171187938Semax return; 172187938Semax } 173187938Semax 174187938Semax len = sizeof(mru); 175187938Semax if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) { 176187938Semax log_err("Could not get L2CAP IMTU: %m"); 177187938Semax close(fd); 178187938Semax return; 179187938Semax } 180187938Semax if(mru < BNEP_MTU_MIN) { 181187938Semax log_err("L2CAP IMTU too small (%d)", mru); 182187938Semax close(fd); 183187938Semax return; 184187938Semax } 185187938Semax 186241699Semax len = sizeof(n); 187241699Semax if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) { 188241699Semax log_err("Could not read SO_RCVBUF"); 189241699Semax close(fd); 190241699Semax return; 191241699Semax } 192241699Semax if (n < (mru * 10)) { 193241699Semax n = mru * 10; 194241699Semax if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1) 195241699Semax log_info("Could not increase SO_RCVBUF (from %d)", n); 196241699Semax } 197241699Semax 198187938Semax len = sizeof(mtu); 199187938Semax if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) { 200187938Semax log_err("Could not get L2CAP OMTU: %m"); 201187938Semax close(fd); 202187938Semax return; 203187938Semax } 204187938Semax if (mtu < BNEP_MTU_MIN) { 205187938Semax log_err("L2CAP OMTU too small (%d)", mtu); 206187938Semax close(fd); 207187938Semax return; 208187938Semax } 209187938Semax 210187938Semax len = sizeof(n); 211187938Semax if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) { 212187938Semax log_err("Could not get socket send buffer size: %m"); 213187938Semax close(fd); 214187938Semax return; 215187938Semax } 216187938Semax 217187938Semax if (n < (mtu * 2)) { 218187938Semax n = mtu * 2; 219187938Semax if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) { 220187938Semax log_err("Could not set socket send buffer size (%d): %m", n); 221187938Semax close(fd); 222187938Semax return; 223187938Semax } 224187938Semax } 225187938Semax 226187938Semax n = mtu; 227187938Semax if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) { 228187938Semax log_err("Could not set socket low water mark (%d): %m", n); 229187938Semax close(fd); 230187938Semax return; 231187938Semax } 232187938Semax 233187938Semax len = sizeof(la); 234187938Semax if (getsockname(fd, (struct sockaddr *)&la, &len) == -1) { 235187938Semax log_err("Could not get socket address: %m"); 236187938Semax close(fd); 237187938Semax return; 238187938Semax } 239187938Semax 240187938Semax log_info("Accepted connection from %s", bt_ntoa(&ra.l2cap_bdaddr, NULL)); 241187938Semax 242187938Semax chan = channel_alloc(); 243187938Semax if (chan == NULL) { 244187938Semax close(fd); 245187938Semax return; 246187938Semax } 247187938Semax 248187938Semax chan->send = bnep_send; 249187938Semax chan->recv = bnep_recv; 250187938Semax chan->mru = mru; 251187938Semax chan->mtu = mtu; 252187938Semax b2eaddr(chan->raddr, &ra.l2cap_bdaddr); 253187938Semax b2eaddr(chan->laddr, &la.l2cap_bdaddr); 254187938Semax chan->state = CHANNEL_WAIT_CONNECT_REQ; 255187938Semax channel_timeout(chan, 10); 256187938Semax if (!channel_open(chan, fd)) { 257187938Semax chan->state = CHANNEL_CLOSED; 258187938Semax channel_free(chan); 259187938Semax close(fd); 260187938Semax return; 261187938Semax } 262187938Semax} 263187938Semax 264187938Semaxstatic void 265187938Semaxserver_register(void) 266187938Semax{ 267187938Semax sdp_nap_profile_t p; 268187938Semax int rv; 269187938Semax 270187938Semax if (server_ss == NULL) { 271187938Semax server_ss = sdp_open_local(control_path); 272187938Semax if (server_ss == NULL || sdp_error(server_ss) != 0) { 273187938Semax log_err("failed to contact SDP server"); 274187938Semax return; 275187938Semax } 276187938Semax } 277187938Semax 278187938Semax memset(&p, 0, sizeof(p)); 279187938Semax p.psm = l2cap_psm; 280188013Semax p.load_factor = server_avail; 281188013Semax p.security_description = (l2cap_mode == 0 ? 0x0000 : 0x0001); 282187938Semax 283187938Semax if (server_handle) 284187938Semax rv = sdp_change_service(server_ss, server_handle, 285187938Semax (uint8_t *)&p, sizeof(p)); 286187938Semax else 287187938Semax rv = sdp_register_service(server_ss, service_class, 288187938Semax &local_bdaddr, (uint8_t *)&p, sizeof(p), &server_handle); 289187938Semax 290187938Semax if (rv != 0) { 291187938Semax errno = sdp_error(server_ss); 292187938Semax log_err("%s: %m", service_name); 293187938Semax exit(EXIT_FAILURE); 294187938Semax } 295187938Semax} 296