diff options
Diffstat (limited to 'src/sdpd-server.c')
| -rw-r--r-- | src/sdpd-server.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/src/sdpd-server.c b/src/sdpd-server.c new file mode 100644 index 0000000..a92ae2c --- /dev/null +++ b/src/sdpd-server.c @@ -0,0 +1,292 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2001-2002 Nokia Corporation + * Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com> + * Copyright (C) 2002-2010 Marcel Holtmann <marcel@holtmann.org> + * Copyright (C) 2002-2003 Stephen Crane <steve.crane@rococosoft.com> + * + * + * 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 <config.h> +#endif + +#include <stdio.h> +#include <errno.h> +#include <unistd.h> +#include <stdlib.h> +#include <sys/stat.h> +#include <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/l2cap.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include <sys/un.h> +#include <netinet/in.h> + +#include <glib.h> + +#include "log.h" +#include "sdpd.h" + +static guint l2cap_id = 0, unix_id = 0; + +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; + } + } + + if (listen(l2cap_sock, 5) < 0) { + error("listen: %s", strerror(errno)); + return -1; + } + + 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; + } + + if (listen(unix_sock, 5) < 0) { + error("listen UNIX socket: %s", strerror(errno)); + return -1; + } + + 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)) + 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; + GIOChannel *io; + + 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); + } + } + + io = g_io_channel_unix_new(l2cap_sock); + g_io_channel_set_close_on_unref(io, TRUE); + + l2cap_id = g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + io_accept_event, &l2cap_sock); + g_io_channel_unref(io); + + if (compat && unix_sock > fileno(stderr)) { + io = g_io_channel_unix_new(unix_sock); + g_io_channel_set_close_on_unref(io, TRUE); + + unix_id = g_io_add_watch(io, + G_IO_IN | G_IO_ERR | G_IO_HUP | G_IO_NVAL, + io_accept_event, &unix_sock); + g_io_channel_unref(io); + } + + return 0; +} + +void stop_sdp_server(void) +{ + info("Stopping SDP server"); + + sdp_svcdb_reset(); + + if (unix_id > 0) + g_source_remove(unix_id); + + if (l2cap_id > 0) + g_source_remove(l2cap_id); + + l2cap_id = unix_id = 0; + l2cap_sock = unix_sock = -1; +} |