/* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2001-2002 Nokia Corporation * Copyright (C) 2002-2003 Maxim Krasnyansky * Copyright (C) 2002-2009 Marcel Holtmann * Copyright (C) 2002-2003 Stephen Crane * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include "logging.h" #include "sdpd.h" static GIOChannel *l2cap_io = NULL, *unix_io = NULL; static int l2cap_sock, unix_sock; /* * SDP server initialization on startup includes creating the * l2cap and unix sockets over which discovery and registration clients * access us respectively */ static int init_server(uint16_t mtu, int master, int compat) { struct l2cap_options opts; struct sockaddr_l2 l2addr; struct sockaddr_un unaddr; socklen_t optlen; /* Register the public browse group root */ register_public_browse_group(); /* Register the SDP server's service record */ register_server_service(); /* Create L2CAP socket */ l2cap_sock = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP); if (l2cap_sock < 0) { error("opening L2CAP socket: %s", strerror(errno)); return -1; } memset(&l2addr, 0, sizeof(l2addr)); l2addr.l2_family = AF_BLUETOOTH; bacpy(&l2addr.l2_bdaddr, BDADDR_ANY); l2addr.l2_psm = htobs(SDP_PSM); if (bind(l2cap_sock, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) { error("binding L2CAP socket: %s", strerror(errno)); return -1; } if (master) { int opt = L2CAP_LM_MASTER; if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_LM, &opt, sizeof(opt)) < 0) { error("setsockopt: %s", strerror(errno)); return -1; } } if (mtu > 0) { memset(&opts, 0, sizeof(opts)); optlen = sizeof(opts); if (getsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, &optlen) < 0) { error("getsockopt: %s", strerror(errno)); return -1; } opts.omtu = mtu; opts.imtu = mtu; if (setsockopt(l2cap_sock, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts)) < 0) { error("setsockopt: %s", strerror(errno)); return -1; } } listen(l2cap_sock, 5); if (!compat) { unix_sock = -1; return 0; } /* Create local Unix socket */ unix_sock = socket(PF_UNIX, SOCK_STREAM, 0); if (unix_sock < 0) { error("opening UNIX socket: %s", strerror(errno)); return -1; } memset(&unaddr, 0, sizeof(unaddr)); unaddr.sun_family = AF_UNIX; strcpy(unaddr.sun_path, SDP_UNIX_PATH); unlink(unaddr.sun_path); if (bind(unix_sock, (struct sockaddr *) &unaddr, sizeof(unaddr)) < 0) { error("binding UNIX socket: %s", strerror(errno)); return -1; } listen(unix_sock, 5); chmod(SDP_UNIX_PATH, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); return 0; } static gboolean io_session_event(GIOChannel *chan, GIOCondition cond, gpointer data) { sdp_pdu_hdr_t hdr; uint8_t *buf; int sk, len, size; if (cond & G_IO_NVAL) return FALSE; sk = g_io_channel_unix_get_fd(chan); if (cond & (G_IO_HUP | G_IO_ERR)) { sdp_svcdb_collect_all(sk); return FALSE; } len = recv(sk, &hdr, sizeof(sdp_pdu_hdr_t), MSG_PEEK); if (len <= 0) { sdp_svcdb_collect_all(sk); return FALSE; } size = sizeof(sdp_pdu_hdr_t) + ntohs(hdr.plen); buf = malloc(size); if (!buf) return TRUE; len = recv(sk, buf, size, 0); if (len <= 0) { sdp_svcdb_collect_all(sk); free(buf); return FALSE; } handle_request(sk, buf, len); return TRUE; } static gboolean io_accept_event(GIOChannel *chan, GIOCondition cond, gpointer data) { GIOChannel *io; int nsk; if (cond & (G_IO_HUP | G_IO_ERR | G_IO_NVAL)) { g_io_channel_unref(chan); return FALSE; } if (data == &l2cap_sock) { struct sockaddr_l2 addr; socklen_t len = sizeof(addr); nsk = accept(l2cap_sock, (struct sockaddr *) &addr, &len); } else if (data == &unix_sock) { struct sockaddr_un addr; socklen_t len = sizeof(addr); nsk = accept(unix_sock, (struct sockaddr *) &addr, &len); } else return FALSE; if (nsk < 0) { error("Can't accept connection: %s", strerror(errno)); return TRUE; } io = g_io_channel_unix_new(nsk); g_io_channel_set_close_on_unref(io, TRUE); g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, io_session_event, data); g_io_channel_unref(io); return TRUE; } int start_sdp_server(uint16_t mtu, const char *did, uint32_t flags) { int compat = flags & SDP_SERVER_COMPAT; int master = flags & SDP_SERVER_MASTER; info("Starting SDP server"); if (init_server(mtu, master, compat) < 0) { error("Server initialization failed"); return -1; } if (did && strlen(did) > 0) { const char *ptr = did; uint16_t vid = 0x0000, pid = 0x0000, ver = 0x0000; vid = (uint16_t) strtol(ptr, NULL, 16); ptr = strchr(ptr, ':'); if (ptr) { pid = (uint16_t) strtol(ptr + 1, NULL, 16); ptr = strchr(ptr + 1, ':'); if (ptr) ver = (uint16_t) strtol(ptr + 1, NULL, 16); register_device_id(vid, pid, ver); } } l2cap_io = g_io_channel_unix_new(l2cap_sock); g_io_channel_set_close_on_unref(l2cap_io, TRUE); g_io_add_watch(l2cap_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, io_accept_event, &l2cap_sock); if (compat && unix_sock > fileno(stderr)) { unix_io = g_io_channel_unix_new(unix_sock); g_io_channel_set_close_on_unref(unix_io, TRUE); g_io_add_watch(unix_io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, io_accept_event, &unix_sock); } return 0; } void stop_sdp_server(void) { info("Stopping SDP server"); sdp_svcdb_reset(); if (unix_io) g_io_channel_unref(unix_io); if (l2cap_io) g_io_channel_unref(l2cap_io); }