diff options
Diffstat (limited to 'src/glib-helper.c')
| -rw-r--r-- | src/glib-helper.c | 587 |
1 files changed, 587 insertions, 0 deletions
diff --git a/src/glib-helper.c b/src/glib-helper.c new file mode 100644 index 0000000..22c14e7 --- /dev/null +++ b/src/glib-helper.c @@ -0,0 +1,587 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> + * + * + * 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 <stdlib.h> +#include <errno.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/socket.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/sdp.h> +#include <bluetooth/sdp_lib.h> + +#include <glib.h> + +#include "btio.h" +#include "sdpd.h" +#include "glib-helper.h" + +/* Number of seconds to keep a sdp_session_t in the cache */ +#define CACHE_TIMEOUT 2 + +struct cached_sdp_session { + bdaddr_t src; + bdaddr_t dst; + sdp_session_t *session; + guint timer; +}; + +static GSList *cached_sdp_sessions = NULL; + +static gboolean cached_session_expired(gpointer user_data) +{ + struct cached_sdp_session *cached = user_data; + + cached_sdp_sessions = g_slist_remove(cached_sdp_sessions, cached); + + sdp_close(cached->session); + + g_free(cached); + + return FALSE; +} + +static sdp_session_t *get_sdp_session(const bdaddr_t *src, const bdaddr_t *dst) +{ + GSList *l; + + for (l = cached_sdp_sessions; l != NULL; l = l->next) { + struct cached_sdp_session *c = l->data; + sdp_session_t *session; + + if (bacmp(&c->src, src) || bacmp(&c->dst, dst)) + continue; + + g_source_remove(c->timer); + + session = c->session; + + cached_sdp_sessions = g_slist_remove(cached_sdp_sessions, c); + g_free(c); + + return session; + } + + return sdp_connect(src, dst, SDP_NON_BLOCKING); +} + +static void cache_sdp_session(bdaddr_t *src, bdaddr_t *dst, + sdp_session_t *session) +{ + struct cached_sdp_session *cached; + + cached = g_new0(struct cached_sdp_session, 1); + + bacpy(&cached->src, src); + bacpy(&cached->dst, dst); + + cached->session = session; + + cached_sdp_sessions = g_slist_append(cached_sdp_sessions, cached); + + cached->timer = g_timeout_add_seconds(CACHE_TIMEOUT, + cached_session_expired, + cached); +} + +struct search_context { + bdaddr_t src; + bdaddr_t dst; + sdp_session_t *session; + bt_callback_t cb; + bt_destroy_t destroy; + gpointer user_data; + uuid_t uuid; + guint io_id; +}; + +static GSList *context_list = NULL; + +static void search_context_cleanup(struct search_context *ctxt) +{ + context_list = g_slist_remove(context_list, ctxt); + + if (ctxt->destroy) + ctxt->destroy(ctxt->user_data); + + g_free(ctxt); +} + +static void search_completed_cb(uint8_t type, uint16_t status, + uint8_t *rsp, size_t size, void *user_data) +{ + struct search_context *ctxt = user_data; + sdp_list_t *recs = NULL; + int scanned, seqlen = 0, bytesleft = size; + uint8_t dataType; + int err = 0; + + if (status || type != SDP_SVC_SEARCH_ATTR_RSP) { + err = -EPROTO; + goto done; + } + + scanned = sdp_extract_seqtype(rsp, bytesleft, &dataType, &seqlen); + if (!scanned || !seqlen) + goto done; + + rsp += scanned; + bytesleft -= scanned; + do { + sdp_record_t *rec; + int recsize; + + recsize = 0; + rec = sdp_extract_pdu(rsp, bytesleft, &recsize); + if (!rec) + break; + + if (!recsize) { + sdp_record_free(rec); + break; + } + + scanned += recsize; + rsp += recsize; + bytesleft -= recsize; + + recs = sdp_list_append(recs, rec); + } while (scanned < (ssize_t) size && bytesleft > 0); + +done: + cache_sdp_session(&ctxt->src, &ctxt->dst, ctxt->session); + + if (ctxt->cb) + ctxt->cb(recs, err, ctxt->user_data); + + if (recs) + sdp_list_free(recs, (sdp_free_func_t) sdp_record_free); + + search_context_cleanup(ctxt); +} + +static gboolean search_process_cb(GIOChannel *chan, GIOCondition cond, + gpointer user_data) +{ + struct search_context *ctxt = user_data; + int err = 0; + + if (cond & (G_IO_ERR | G_IO_HUP | G_IO_NVAL)) { + err = EIO; + goto failed; + } + + if (sdp_process(ctxt->session) < 0) + goto failed; + + return TRUE; + +failed: + if (err) { + sdp_close(ctxt->session); + ctxt->session = NULL; + + if (ctxt->cb) + ctxt->cb(NULL, err, ctxt->user_data); + + search_context_cleanup(ctxt); + } + + return FALSE; +} + +static gboolean connect_watch(GIOChannel *chan, GIOCondition cond, + gpointer user_data) +{ + struct search_context *ctxt = user_data; + sdp_list_t *search, *attrids; + uint32_t range = 0x0000ffff; + socklen_t len; + int sk, err = 0; + + sk = g_io_channel_unix_get_fd(chan); + ctxt->io_id = 0; + + len = sizeof(err); + if (getsockopt(sk, SOL_SOCKET, SO_ERROR, &err, &len) < 0) { + err = errno; + goto failed; + } + + if (err != 0) + goto failed; + + if (sdp_set_notify(ctxt->session, search_completed_cb, ctxt) < 0) { + err = EIO; + goto failed; + } + + search = sdp_list_append(NULL, &ctxt->uuid); + attrids = sdp_list_append(NULL, &range); + if (sdp_service_search_attr_async(ctxt->session, + search, SDP_ATTR_REQ_RANGE, attrids) < 0) { + sdp_list_free(attrids, NULL); + sdp_list_free(search, NULL); + err = EIO; + goto failed; + } + + sdp_list_free(attrids, NULL); + sdp_list_free(search, NULL); + + /* Set callback responsible for update the internal SDP transaction */ + ctxt->io_id = g_io_add_watch(chan, + G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL, + search_process_cb, ctxt); + return FALSE; + +failed: + sdp_close(ctxt->session); + ctxt->session = NULL; + + if (ctxt->cb) + ctxt->cb(NULL, -err, ctxt->user_data); + + search_context_cleanup(ctxt); + + return FALSE; +} + +static int create_search_context(struct search_context **ctxt, + const bdaddr_t *src, + const bdaddr_t *dst, + uuid_t *uuid) +{ + sdp_session_t *s; + GIOChannel *chan; + + if (!ctxt) + return -EINVAL; + + s = get_sdp_session(src, dst); + if (!s) + return -errno; + + *ctxt = g_try_malloc0(sizeof(struct search_context)); + if (!*ctxt) { + sdp_close(s); + return -ENOMEM; + } + + bacpy(&(*ctxt)->src, src); + bacpy(&(*ctxt)->dst, dst); + (*ctxt)->session = s; + (*ctxt)->uuid = *uuid; + + chan = g_io_channel_unix_new(sdp_get_socket(s)); + (*ctxt)->io_id = g_io_add_watch(chan, + G_IO_OUT | G_IO_HUP | G_IO_ERR | G_IO_NVAL, + connect_watch, *ctxt); + g_io_channel_unref(chan); + + return 0; +} + +int bt_search_service(const bdaddr_t *src, const bdaddr_t *dst, + uuid_t *uuid, bt_callback_t cb, void *user_data, + bt_destroy_t destroy) +{ + struct search_context *ctxt = NULL; + int err; + + if (!cb) + return -EINVAL; + + err = create_search_context(&ctxt, src, dst, uuid); + if (err < 0) + return err; + + ctxt->cb = cb; + ctxt->destroy = destroy; + ctxt->user_data = user_data; + + context_list = g_slist_append(context_list, ctxt); + + return 0; +} + +static gint find_by_bdaddr(gconstpointer data, gconstpointer user_data) +{ + const struct search_context *ctxt = data, *search = user_data; + + return (bacmp(&ctxt->dst, &search->dst) && + bacmp(&ctxt->src, &search->src)); +} + +int bt_cancel_discovery(const bdaddr_t *src, const bdaddr_t *dst) +{ + struct search_context match, *ctxt; + GSList *l; + + memset(&match, 0, sizeof(match)); + bacpy(&match.src, src); + bacpy(&match.dst, dst); + + /* Ongoing SDP Discovery */ + l = g_slist_find_custom(context_list, &match, find_by_bdaddr); + if (l == NULL) + return -ENOENT; + + ctxt = l->data; + + if (!ctxt->session) + return -ENOTCONN; + + if (ctxt->io_id) + g_source_remove(ctxt->io_id); + + if (ctxt->session) + sdp_close(ctxt->session); + + search_context_cleanup(ctxt); + + return 0; +} + +char *bt_uuid2string(uuid_t *uuid) +{ + gchar *str; + uuid_t uuid128; + unsigned int data0; + unsigned short data1; + unsigned short data2; + unsigned short data3; + unsigned int data4; + unsigned short data5; + + if (!uuid) + return NULL; + + switch (uuid->type) { + case SDP_UUID16: + sdp_uuid16_to_uuid128(&uuid128, uuid); + break; + case SDP_UUID32: + sdp_uuid32_to_uuid128(&uuid128, uuid); + break; + case SDP_UUID128: + memcpy(&uuid128, uuid, sizeof(uuid_t)); + break; + default: + /* Type of UUID unknown */ + return NULL; + } + + memcpy(&data0, &uuid128.value.uuid128.data[0], 4); + memcpy(&data1, &uuid128.value.uuid128.data[4], 2); + memcpy(&data2, &uuid128.value.uuid128.data[6], 2); + memcpy(&data3, &uuid128.value.uuid128.data[8], 2); + memcpy(&data4, &uuid128.value.uuid128.data[10], 4); + memcpy(&data5, &uuid128.value.uuid128.data[14], 2); + + str = g_try_malloc0(MAX_LEN_UUID_STR); + if (!str) + return NULL; + + sprintf(str, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x", + g_ntohl(data0), g_ntohs(data1), + g_ntohs(data2), g_ntohs(data3), + g_ntohl(data4), g_ntohs(data5)); + + return str; +} + +static struct { + const char *name; + uint16_t class; +} bt_services[] = { + { "vcp", VIDEO_CONF_SVCLASS_ID }, + { "pbap", PBAP_SVCLASS_ID }, + { "sap", SAP_SVCLASS_ID }, + { "ftp", OBEX_FILETRANS_SVCLASS_ID }, + { "bpp", BASIC_PRINTING_SVCLASS_ID }, + { "bip", IMAGING_SVCLASS_ID }, + { "synch", IRMC_SYNC_SVCLASS_ID }, + { "dun", DIALUP_NET_SVCLASS_ID }, + { "opp", OBEX_OBJPUSH_SVCLASS_ID }, + { "fax", FAX_SVCLASS_ID }, + { "spp", SERIAL_PORT_SVCLASS_ID }, + { "hsp", HEADSET_SVCLASS_ID }, + { "hfp", HANDSFREE_SVCLASS_ID }, + { } +}; + +static uint16_t name2class(const char *pattern) +{ + int i; + + for (i = 0; bt_services[i].name; i++) { + if (strcasecmp(bt_services[i].name, pattern) == 0) + return bt_services[i].class; + } + + return 0; +} + +static inline gboolean is_uuid128(const char *string) +{ + return (strlen(string) == 36 && + string[8] == '-' && + string[13] == '-' && + string[18] == '-' && + string[23] == '-'); +} + +static int string2uuid16(uuid_t *uuid, const char *string) +{ + int length = strlen(string); + char *endptr = NULL; + uint16_t u16; + + if (length != 4 && length != 6) + return -EINVAL; + + u16 = strtol(string, &endptr, 16); + if (endptr && *endptr == '\0') { + sdp_uuid16_create(uuid, u16); + return 0; + } + + return -EINVAL; +} + +char *bt_name2string(const char *pattern) +{ + uuid_t uuid; + uint16_t uuid16; + int i; + + /* UUID 128 string format */ + if (is_uuid128(pattern)) + return g_strdup(pattern); + + /* Friendly service name format */ + uuid16 = name2class(pattern); + if (uuid16) + goto proceed; + + /* HEX format */ + uuid16 = strtol(pattern, NULL, 16); + for (i = 0; bt_services[i].class; i++) { + if (bt_services[i].class == uuid16) + goto proceed; + } + + return NULL; + +proceed: + sdp_uuid16_create(&uuid, uuid16); + + return bt_uuid2string(&uuid); +} + +int bt_string2uuid(uuid_t *uuid, const char *string) +{ + uint32_t data0, data4; + uint16_t data1, data2, data3, data5; + + if (is_uuid128(string) && + sscanf(string, "%08x-%04hx-%04hx-%04hx-%08x%04hx", + &data0, &data1, &data2, &data3, &data4, &data5) == 6) { + uint8_t val[16]; + + data0 = g_htonl(data0); + data1 = g_htons(data1); + data2 = g_htons(data2); + data3 = g_htons(data3); + data4 = g_htonl(data4); + data5 = g_htons(data5); + + memcpy(&val[0], &data0, 4); + memcpy(&val[4], &data1, 2); + memcpy(&val[6], &data2, 2); + memcpy(&val[8], &data3, 2); + memcpy(&val[10], &data4, 4); + memcpy(&val[14], &data5, 2); + + sdp_uuid128_create(uuid, val); + + return 0; + } else { + uint16_t class = name2class(string); + if (class) { + sdp_uuid16_create(uuid, class); + return 0; + } + + return string2uuid16(uuid, string); + } +} + +gchar *bt_list2string(GSList *list) +{ + GSList *l; + gchar *str, *tmp; + + if (!list) + return NULL; + + str = g_strdup((const gchar *) list->data); + + for (l = list->next; l; l = l->next) { + tmp = g_strconcat(str, " " , (const gchar *) l->data, NULL); + g_free(str); + str = tmp; + } + + return str; +} + +GSList *bt_string2list(const gchar *str) +{ + GSList *l = NULL; + gchar **uuids; + int i = 0; + + if (!str) + return NULL; + + /* FIXME: eglib doesn't support g_strsplit */ + uuids = g_strsplit(str, " ", 0); + if (!uuids) + return NULL; + + while (uuids[i]) { + l = g_slist_append(l, uuids[i]); + i++; + } + + g_free(uuids); + + return l; +} |