/* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2001-2002 Nokia Corporation * Copyright (C) 2002-2003 Maxim Krasnyansky * Copyright (C) 2002-2006 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 #include #include #include #define SDPINF(fmt, arg...) syslog(LOG_INFO, fmt "\n", ## arg) #define SDPERR(fmt, arg...) syslog(LOG_ERR, "%s: " fmt "\n", __func__ , ## arg) #ifdef SDP_DEBUG #define SDPDBG(fmt, arg...) syslog(LOG_DEBUG, "%s: " fmt "\n", __func__ , ## arg) #else #define SDPDBG(fmt...) #endif #if __BYTE_ORDER == __BIG_ENDIAN #define ntoh64(x) (x) static inline void ntoh128(uint128_t *src, uint128_t *dst) { int i; for (i = 0; i < 16; i++) dst->data[i] = src->data[i]; } #else static inline uint64_t ntoh64(uint64_t n) { uint64_t h; uint64_t tmp = ntohl(n & 0x00000000ffffffff); h = ntohl(n >> 32); h |= tmp << 32; return h; } static inline void ntoh128(uint128_t *src, uint128_t *dst) { int i; for (i = 0; i < 16; i++) dst->data[15 - i] = src->data[i]; } #endif #define hton64(x) ntoh64(x) #define hton128(x, y) ntoh128(x, y) #define BASE_UUID "00000000-0000-1000-8000-00805F9B34FB" static uint128_t *bluetooth_base_uuid = NULL; #define SDP_BASIC_ATTR_PDUFORM_SIZE 32 #define SDP_SEQ_PDUFORM_SIZE 128 #define SDP_UUID_SEQ_SIZE 256 #define SDP_MAX_ATTR_LEN 65535 /* Message structure. */ struct tupla { int index; char *str; }; static struct tupla Protocol[] = { { SDP_UUID, "SDP" }, { UDP_UUID, "UDP" }, { RFCOMM_UUID, "RFCOMM" }, { TCP_UUID, "TCP" }, { TCS_BIN_UUID, "TCS-BIN" }, { TCS_AT_UUID, "TCS-AT" }, { OBEX_UUID, "OBEX" }, { IP_UUID, "IP" }, { FTP_UUID, "FTP" }, { HTTP_UUID, "HTTP" }, { WSP_UUID, "WSP" }, { BNEP_UUID, "BNEP" }, { UPNP_UUID, "UPNP" }, { HIDP_UUID, "HIDP" }, { HCRP_CTRL_UUID, "HCRP-Ctrl" }, { HCRP_DATA_UUID, "HCRP-Data" }, { HCRP_NOTE_UUID, "HCRP-Notify" }, { AVCTP_UUID, "AVCTP" }, { AVDTP_UUID, "AVDTP" }, { CMTP_UUID, "CMTP" }, { UDI_UUID, "UDI" }, { L2CAP_UUID, "L2CAP" }, { 0 } }; static struct tupla ServiceClass[] = { { SDP_SERVER_SVCLASS_ID, "SDP Server" }, { BROWSE_GRP_DESC_SVCLASS_ID, "Browse Group Descriptor" }, { PUBLIC_BROWSE_GROUP, "Public Browse Group" }, { SERIAL_PORT_SVCLASS_ID, "Serial Port" }, { LAN_ACCESS_SVCLASS_ID, "LAN Access Using PPP" }, { DIALUP_NET_SVCLASS_ID, "Dialup Networking" }, { IRMC_SYNC_SVCLASS_ID, "IrMC Sync" }, { OBEX_OBJPUSH_SVCLASS_ID, "OBEX Object Push" }, { OBEX_FILETRANS_SVCLASS_ID, "OBEX File Transfer" }, { IRMC_SYNC_CMD_SVCLASS_ID, "IrMC Sync Command" }, { HEADSET_SVCLASS_ID, "Headset" }, { CORDLESS_TELEPHONY_SVCLASS_ID, "Cordless Telephony" }, { AUDIO_SOURCE_SVCLASS_ID, "Audio Source" }, { AUDIO_SINK_SVCLASS_ID, "Audio Sink" }, { AV_REMOTE_TARGET_SVCLASS_ID, "AV Remote Target" }, { ADVANCED_AUDIO_SVCLASS_ID, "Advanced Audio" }, { AV_REMOTE_SVCLASS_ID, "AV Remote" }, { VIDEO_CONF_SVCLASS_ID, "Video Conferencing" }, { INTERCOM_SVCLASS_ID, "Intercom" }, { FAX_SVCLASS_ID, "Fax" }, { HEADSET_AGW_SVCLASS_ID, "Headset Audio Gateway" }, { WAP_SVCLASS_ID, "WAP" }, { WAP_CLIENT_SVCLASS_ID, "WAP Client" }, { PANU_SVCLASS_ID, "PAN User" }, { NAP_SVCLASS_ID, "Network Access Point" }, { GN_SVCLASS_ID, "PAN Group Network" }, { DIRECT_PRINTING_SVCLASS_ID, "Direct Printing" }, { REFERENCE_PRINTING_SVCLASS_ID, "Reference Printing" }, { IMAGING_SVCLASS_ID, "Imaging" }, { IMAGING_RESPONDER_SVCLASS_ID, "Imaging Responder" }, { IMAGING_ARCHIVE_SVCLASS_ID, "Imaging Automatic Archive" }, { IMAGING_REFOBJS_SVCLASS_ID, "Imaging Referenced Objects" }, { HANDSFREE_SVCLASS_ID, "Handsfree" }, { HANDSFREE_AGW_SVCLASS_ID, "Handfree Audio Gateway" }, { DIRECT_PRT_REFOBJS_SVCLASS_ID, "Direct Printing Ref. Objects" }, { REFLECTED_UI_SVCLASS_ID, "Reflected UI" }, { BASIC_PRINTING_SVCLASS_ID, "Basic Printing" }, { PRINTING_STATUS_SVCLASS_ID, "Printing Status" }, { HID_SVCLASS_ID, "Human Interface Device" }, { HCR_SVCLASS_ID, "Hardcopy Cable Replacement" }, { HCR_PRINT_SVCLASS_ID, "HCR Print" }, { HCR_SCAN_SVCLASS_ID, "HCR Scan" }, { CIP_SVCLASS_ID, "Common ISDN Access" }, { VIDEO_CONF_GW_SVCLASS_ID, "Video Conferencing Gateway" }, { UDI_MT_SVCLASS_ID, "UDI MT" }, { UDI_TA_SVCLASS_ID, "UDI TA" }, { AV_SVCLASS_ID, "Audio/Video" }, { SAP_SVCLASS_ID, "SIM Access" }, { PBAP_PCE_SVCLASS_ID, "Phonebook Access - PCE" }, { PBAP_PSE_SVCLASS_ID, "Phonebook Access - PSE" }, { PBAP_SVCLASS_ID, "Phonebook Access" }, { PNP_INFO_SVCLASS_ID, "PnP Information" }, { GENERIC_NETWORKING_SVCLASS_ID, "Generic Networking" }, { GENERIC_FILETRANS_SVCLASS_ID, "Generic File Transfer" }, { GENERIC_AUDIO_SVCLASS_ID, "Generic Audio" }, { GENERIC_TELEPHONY_SVCLASS_ID, "Generic Telephony" }, { UPNP_SVCLASS_ID, "UPnP" }, { UPNP_IP_SVCLASS_ID, "UPnP IP" }, { UPNP_PAN_SVCLASS_ID, "UPnP PAN" }, { UPNP_LAP_SVCLASS_ID, "UPnP LAP" }, { UPNP_L2CAP_SVCLASS_ID, "UPnP L2CAP" }, { VIDEO_SOURCE_SVCLASS_ID, "Video Source" }, { VIDEO_SINK_SVCLASS_ID, "Video Sink" }, { VIDEO_DISTRIBUTION_SVCLASS_ID, "Video Distribution" }, { APPLE_AGENT_SVCLASS_ID, "Apple Agent" }, { 0 } }; #define Profile ServiceClass static char *string_lookup(struct tupla *pt0, int index) { struct tupla *pt; for (pt = pt0; pt->index; pt++) if (pt->index == index) return pt->str; return ""; } /* * Prints into a string the Protocol UUID * coping a maximum of n characters. */ static int uuid2str(struct tupla *message, const uuid_t *uuid, char *str, size_t n) { char *str2; if (!uuid) { snprintf(str, n, "NULL"); return -2; } switch (uuid->type) { case SDP_UUID16: str2 = string_lookup(message, uuid->value.uuid16); snprintf(str, n, str2); break; case SDP_UUID32: str2 = string_lookup(message, uuid->value.uuid32); snprintf(str, n, str2); break; case SDP_UUID128: snprintf(str, n, "Error: This is UUID-128"); return -4; default: snprintf(str, n, "Type of UUID (%x) unknown.", uuid->type); return -1; } return 0; } int sdp_proto_uuid2strn(const uuid_t *uuid, char *str, size_t n) { return uuid2str(Protocol, uuid, str, n); } int sdp_svclass_uuid2strn(const uuid_t *uuid, char *str, size_t n) { return uuid2str(ServiceClass, uuid, str, n); } int sdp_profile_uuid2strn(const uuid_t *uuid, char *str, size_t n) { return uuid2str(Profile, uuid, str, n); } /* * convert the UUID to string, copying a maximum of n characters. */ int sdp_uuid2strn(const uuid_t *uuid, char *str, size_t n) { if (!uuid) { snprintf(str, n, "NULL"); return -2; } switch (uuid->type) { case SDP_UUID16: snprintf(str, n, "%.4x", uuid->value.uuid16); break; case SDP_UUID32: snprintf(str, n, "%.8x", uuid->value.uuid32); break; case SDP_UUID128:{ unsigned int data0; unsigned short data1; unsigned short data2; unsigned short data3; unsigned int data4; unsigned short data5; memcpy(&data0, &uuid->value.uuid128.data[0], 4); memcpy(&data1, &uuid->value.uuid128.data[4], 2); memcpy(&data2, &uuid->value.uuid128.data[6], 2); memcpy(&data3, &uuid->value.uuid128.data[8], 2); memcpy(&data4, &uuid->value.uuid128.data[10], 4); memcpy(&data5, &uuid->value.uuid128.data[14], 2); snprintf(str, n, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x", ntohl(data0), ntohs(data1), ntohs(data2), ntohs(data3), ntohl(data4), ntohs(data5)); } break; default: snprintf(str, n, "Type of UUID (%x) unknown.", uuid->type); return -1; // Enum type of UUID not set } return 0; } #ifdef SDP_DEBUG /* * Function prints the UUID in hex as per defined syntax - * * 4bytes-2bytes-2bytes-2bytes-6bytes * * There is some ugly code, including hardcoding, but * that is just the way it is converting 16 and 32 bit * UUIDs to 128 bit as defined in the SDP doc */ void sdp_uuid_print(const uuid_t *uuid) { if (uuid == NULL) { SDPERR("Null passed to print UUID\n"); return; } if (uuid->type == SDP_UUID16) { SDPDBG(" uint16_t : 0x%.4x\n", uuid->value.uuid16); } else if (uuid->type == SDP_UUID32) { SDPDBG(" uint32_t : 0x%.8x\n", uuid->value.uuid32); } else if (uuid->type == SDP_UUID128) { unsigned int data0; unsigned short data1; unsigned short data2; unsigned short data3; unsigned int data4; unsigned short data5; memcpy(&data0, &uuid->value.uuid128.data[0], 4); memcpy(&data1, &uuid->value.uuid128.data[4], 2); memcpy(&data2, &uuid->value.uuid128.data[6], 2); memcpy(&data3, &uuid->value.uuid128.data[8], 2); memcpy(&data4, &uuid->value.uuid128.data[10], 4); memcpy(&data5, &uuid->value.uuid128.data[14], 2); SDPDBG(" uint128_t : 0x%.8x-", ntohl(data0)); SDPDBG("%.4x-", ntohs(data1)); SDPDBG("%.4x-", ntohs(data2)); SDPDBG("%.4x-", ntohs(data3)); SDPDBG("%.8x", ntohl(data4)); SDPDBG("%.4x\n", ntohs(data5)); } else SDPERR("Enum type of UUID not set\n"); } #endif sdp_data_t *sdp_data_alloc_with_length(uint8_t dtd, const void *value, uint32_t length) { sdp_data_t *seq; sdp_data_t *d = malloc(sizeof(sdp_data_t)); if (!d) return NULL; memset(d, 0, sizeof(sdp_data_t)); d->dtd = dtd; d->unitSize = sizeof(uint8_t); switch (dtd) { case SDP_DATA_NIL: break; case SDP_UINT8: d->val.uint8 = *(uint8_t *) value; d->unitSize += sizeof(uint8_t); break; case SDP_INT8: case SDP_BOOL: d->val.int8 = *(int8_t *) value; d->unitSize += sizeof(int8_t); break; case SDP_UINT16: d->val.uint16 = bt_get_unaligned((uint16_t *) value); d->unitSize += sizeof(uint16_t); break; case SDP_INT16: d->val.int16 = bt_get_unaligned((int16_t *) value); d->unitSize += sizeof(int16_t); break; case SDP_UINT32: d->val.uint32 = bt_get_unaligned((uint32_t *) value); d->unitSize += sizeof(uint32_t); break; case SDP_INT32: d->val.int32 = bt_get_unaligned((int32_t *) value); d->unitSize += sizeof(int32_t); break; case SDP_INT64: d->val.int64 = bt_get_unaligned((int64_t *) value); d->unitSize += sizeof(int64_t); break; case SDP_UINT64: d->val.uint64 = bt_get_unaligned((uint64_t *) value); d->unitSize += sizeof(uint64_t); break; case SDP_UINT128: memcpy(&d->val.uint128.data, value, sizeof(uint128_t)); d->unitSize += sizeof(uint128_t); break; case SDP_INT128: memcpy(&d->val.int128.data, value, sizeof(uint128_t)); d->unitSize += sizeof(uint128_t); break; case SDP_UUID16: sdp_uuid16_create(&d->val.uuid, bt_get_unaligned((uint16_t *) value)); d->unitSize += sizeof(uint16_t); break; case SDP_UUID32: sdp_uuid32_create(&d->val.uuid, bt_get_unaligned((uint32_t *) value)); d->unitSize += sizeof(uint32_t); break; case SDP_UUID128: sdp_uuid128_create(&d->val.uuid, value); d->unitSize += sizeof(uint128_t); break; case SDP_URL_STR8: case SDP_URL_STR16: case SDP_TEXT_STR8: case SDP_TEXT_STR16: if (!value) { free(d); return NULL; } d->unitSize += length; if (length <= USHRT_MAX) { d->val.str = malloc(length); if (!d->val.str) { free(d); return NULL; } memcpy(d->val.str, value, length); } else { SDPERR("Strings of size > USHRT_MAX not supported\n"); free(d); d = NULL; } break; case SDP_URL_STR32: case SDP_TEXT_STR32: SDPERR("Strings of size > USHRT_MAX not supported\n"); break; case SDP_ALT8: case SDP_ALT16: case SDP_ALT32: case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: if (dtd == SDP_ALT8 || dtd == SDP_SEQ8) d->unitSize += sizeof(uint8_t); else if (dtd == SDP_ALT16 || dtd == SDP_SEQ16) d->unitSize += sizeof(uint16_t); else if (dtd == SDP_ALT32 || dtd == SDP_SEQ32) d->unitSize += sizeof(uint32_t); seq = (sdp_data_t *)value; d->val.dataseq = seq; for (; seq; seq = seq->next) d->unitSize += seq->unitSize; break; default: free(d); d = NULL; } return d; } sdp_data_t *sdp_data_alloc(uint8_t dtd, const void *value) { uint32_t length; switch (dtd) { case SDP_URL_STR8: case SDP_URL_STR16: case SDP_TEXT_STR8: case SDP_TEXT_STR16: if (!value) return NULL; length = strlen((char *) value); break; default: length = 0; break; } return sdp_data_alloc_with_length(dtd, value, length); } sdp_data_t *sdp_seq_append(sdp_data_t *seq, sdp_data_t *d) { if (seq) { sdp_data_t *p; for (p = seq; p->next; p = p->next); p->next = d; } else seq = d; d->next = NULL; return seq; } sdp_data_t *sdp_seq_alloc_with_length(void **dtds, void **values, int *length, int len) { sdp_data_t *curr = NULL, *seq = NULL; int i; for (i = 0; i < len; i++) { sdp_data_t *data; int8_t dtd = *(uint8_t *) dtds[i]; if (dtd >= SDP_SEQ8 && dtd <= SDP_ALT32) data = (sdp_data_t *) values[i]; else data = sdp_data_alloc_with_length(dtd, values[i], length[i]); if (!data) return NULL; if (curr) curr->next = data; else seq = data; curr = data; } return sdp_data_alloc_with_length(SDP_SEQ8, seq, length[i]); } sdp_data_t *sdp_seq_alloc(void **dtds, void **values, int len) { sdp_data_t *curr = NULL, *seq = NULL; int i; for (i = 0; i < len; i++) { sdp_data_t *data; uint8_t dtd = *(uint8_t *) dtds[i]; if (dtd >= SDP_SEQ8 && dtd <= SDP_ALT32) data = (sdp_data_t *) values[i]; else data = sdp_data_alloc(dtd, values[i]); if (!data) return NULL; if (curr) curr->next = data; else seq = data; curr = data; } return sdp_data_alloc(SDP_SEQ8, seq); } int sdp_attr_add(sdp_record_t *rec, uint16_t attr, sdp_data_t *d) { sdp_data_t *p = sdp_data_get(rec, attr); if (p) return -1; d->attrId = attr; rec->attrlist = sdp_list_insert_sorted(rec->attrlist, d, sdp_attrid_comp_func); return 0; } void sdp_attr_remove(sdp_record_t *rec, uint16_t attr) { sdp_data_t *d = sdp_data_get(rec, attr); if (d) rec->attrlist = sdp_list_remove(rec->attrlist, d); } void sdp_set_seq_len(uint8_t *ptr, uint32_t length) { uint8_t dtd = *(uint8_t *) ptr++; switch (dtd) { case SDP_SEQ8: case SDP_ALT8: case SDP_TEXT_STR8: case SDP_URL_STR8: *(uint8_t *)ptr = (uint8_t) length; break; case SDP_SEQ16: case SDP_ALT16: case SDP_TEXT_STR16: case SDP_URL_STR16: bt_put_unaligned(htons(length), (uint16_t *) ptr); break; case SDP_SEQ32: case SDP_ALT32: case SDP_TEXT_STR32: case SDP_URL_STR32: bt_put_unaligned(htonl(length), (uint32_t *) ptr); break; } } int sdp_set_data_type(sdp_buf_t *buf, uint8_t dtd) { int orig = buf->data_size; uint8_t *p = buf->data + buf->data_size; *p++ = dtd; buf->data_size += sizeof(uint8_t); switch (dtd) { case SDP_SEQ8: case SDP_TEXT_STR8: case SDP_URL_STR8: case SDP_ALT8: buf->data_size += sizeof(uint8_t); break; case SDP_SEQ16: case SDP_TEXT_STR16: case SDP_URL_STR16: case SDP_ALT16: buf->data_size += sizeof(uint16_t); break; case SDP_SEQ32: case SDP_TEXT_STR32: case SDP_URL_STR32: case SDP_ALT32: buf->data_size += sizeof(uint32_t); break; } return buf->data_size - orig; } void sdp_set_attrid(sdp_buf_t *buf, uint16_t attr) { uint8_t *p = buf->data; // data type for attr *p++ = SDP_UINT16; buf->data_size = sizeof(uint8_t); bt_put_unaligned(htons(attr), (uint16_t *) p); p += sizeof(uint16_t); buf->data_size += sizeof(uint16_t); } static int get_data_size(sdp_buf_t *buf, sdp_data_t *sdpdata) { sdp_data_t *d; int n = 0; for (d = sdpdata->val.dataseq; d; d = d->next) n += sdp_gen_pdu(buf, d); return n; } int sdp_gen_pdu(sdp_buf_t *buf, sdp_data_t *d) { uint32_t pdu_size = 0, data_size = 0; unsigned char *src = NULL, is_seq = 0, is_alt = 0; uint8_t dtd = d->dtd; uint16_t u16; uint32_t u32; uint64_t u64; uint128_t u128; uint8_t *seqp = buf->data + buf->data_size; pdu_size = sdp_set_data_type(buf, dtd); switch (dtd) { case SDP_DATA_NIL: break; case SDP_UINT8: src = &d->val.uint8; data_size = sizeof(uint8_t); break; case SDP_UINT16: u16 = htons(d->val.uint16); src = (unsigned char *)&u16; data_size = sizeof(uint16_t); break; case SDP_UINT32: u32 = htonl(d->val.uint32); src = (unsigned char *)&u32; data_size = sizeof(uint32_t); break; case SDP_UINT64: u64 = hton64(d->val.uint64); src = (unsigned char *)&u64; data_size = sizeof(uint64_t); break; case SDP_UINT128: hton128(&d->val.uint128, &u128); src = (unsigned char *)&u128; data_size = sizeof(uint128_t); break; case SDP_INT8: case SDP_BOOL: src = (unsigned char *)&d->val.int8; data_size = sizeof(int8_t); break; case SDP_INT16: u16 = htons(d->val.int16); src = (unsigned char *)&u16; data_size = sizeof(int16_t); break; case SDP_INT32: u32 = htonl(d->val.int32); src = (unsigned char *)&u32; data_size = sizeof(int32_t); break; case SDP_INT64: u64 = hton64(d->val.int64); src = (unsigned char *)&u64; data_size = sizeof(int64_t); break; case SDP_INT128: hton128(&d->val.int128, &u128); src = (unsigned char *)&u128; data_size = sizeof(uint128_t); break; case SDP_TEXT_STR8: case SDP_TEXT_STR16: case SDP_TEXT_STR32: src = (unsigned char *)d->val.str; data_size = d->unitSize - sizeof(uint8_t); sdp_set_seq_len(seqp, data_size); break; case SDP_URL_STR8: case SDP_URL_STR16: case SDP_URL_STR32: src = (unsigned char *)d->val.str; data_size = strlen(d->val.str); sdp_set_seq_len(seqp, data_size); break; case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: is_seq = 1; data_size = get_data_size(buf, d); sdp_set_seq_len(seqp, data_size); break; case SDP_ALT8: case SDP_ALT16: case SDP_ALT32: is_alt = 1; data_size = get_data_size(buf, d); sdp_set_seq_len(seqp, data_size); break; case SDP_UUID16: u16 = htons(d->val.uuid.value.uuid16); src = (unsigned char *)&u16; data_size = sizeof(uint16_t); break; case SDP_UUID32: u32 = htonl(d->val.uuid.value.uuid32); src = (unsigned char *)&u32; data_size = sizeof(uint32_t); break; case SDP_UUID128: src = (unsigned char *)&d->val.uuid.value.uuid128; data_size = sizeof(uint128_t); break; default: break; } if (!is_seq && !is_alt) { if (src && buf) { memcpy(buf->data + buf->data_size, src, data_size); buf->data_size += data_size; } else if (dtd != SDP_DATA_NIL) SDPDBG("Gen PDU : Cant copy from NULL source or dest\n"); } pdu_size += data_size; return pdu_size; } static void sdp_attr_pdu(void *value, void *udata) { sdp_append_to_pdu((sdp_buf_t *)udata, (sdp_data_t *)value); } int sdp_gen_record_pdu(const sdp_record_t *rec, sdp_buf_t *buf) { buf->data = malloc(SDP_PDU_CHUNK_SIZE); if (buf->data) { buf->buf_size = SDP_PDU_CHUNK_SIZE; buf->data_size = 0; memset(buf->data, 0, buf->buf_size); sdp_list_foreach(rec->attrlist, sdp_attr_pdu, buf); return 0; } return -1; } void sdp_attr_replace(sdp_record_t *rec, uint16_t attr, sdp_data_t *d) { sdp_data_t *p = sdp_data_get(rec, attr); if (p) { rec->attrlist = sdp_list_remove(rec->attrlist, p); sdp_data_free(p); } d->attrId = attr; rec->attrlist = sdp_list_insert_sorted(rec->attrlist, (void *)d, sdp_attrid_comp_func); } int sdp_attrid_comp_func(const void *key1, const void *key2) { const sdp_data_t *d1 = (const sdp_data_t *)key1; const sdp_data_t *d2 = (const sdp_data_t *)key2; if (d1 && d2) return d1->attrId - d2->attrId; return 0; } static void data_seq_free(sdp_data_t *seq) { sdp_data_t *d = seq->val.dataseq; while (d) { sdp_data_t *next = d->next; sdp_data_free(d); d = next; } } void sdp_data_free(sdp_data_t *d) { switch (d->dtd) { case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: data_seq_free(d); break; case SDP_URL_STR8: case SDP_URL_STR16: case SDP_URL_STR32: case SDP_TEXT_STR8: case SDP_TEXT_STR16: case SDP_TEXT_STR32: free(d->val.str); break; } free(d); } static sdp_data_t *extract_int(const void *p, int *len) { sdp_data_t *d = malloc(sizeof(sdp_data_t)); SDPDBG("Extracting integer\n"); memset(d, 0, sizeof(sdp_data_t)); d->dtd = *(uint8_t *) p; p += sizeof(uint8_t); *len += sizeof(uint8_t); switch (d->dtd) { case SDP_DATA_NIL: break; case SDP_BOOL: case SDP_INT8: case SDP_UINT8: *len += sizeof(uint8_t); d->val.uint8 = *(uint8_t *) p; break; case SDP_INT16: case SDP_UINT16: *len += sizeof(uint16_t); d->val.uint16 = ntohs(bt_get_unaligned((uint16_t *) p)); break; case SDP_INT32: case SDP_UINT32: *len += sizeof(uint32_t); d->val.uint32 = ntohl(bt_get_unaligned((uint32_t *) p)); break; case SDP_INT64: case SDP_UINT64: *len += sizeof(uint64_t); d->val.uint64 = ntoh64(bt_get_unaligned((uint64_t *) p)); break; case SDP_INT128: case SDP_UINT128: *len += sizeof(uint128_t); ntoh128((uint128_t *) p, &d->val.uint128); break; default: free(d); d = NULL; } return d; } static sdp_data_t *extract_uuid(const uint8_t *p, int *len, sdp_record_t *rec) { sdp_data_t *d = malloc(sizeof(sdp_data_t)); SDPDBG("Extracting UUID"); memset(d, 0, sizeof(sdp_data_t)); if (sdp_uuid_extract(p, &d->val.uuid, len) < 0) { free(d); return NULL; } d->dtd = *(uint8_t *) p; sdp_pattern_add_uuid(rec, &d->val.uuid); return d; } /* * Extract strings from the PDU (could be service description and similar info) */ static sdp_data_t *extract_str(const void *p, int *len) { char *s; int n; sdp_data_t *d = malloc(sizeof(sdp_data_t)); memset(d, 0, sizeof(sdp_data_t)); d->dtd = *(uint8_t *) p; p += sizeof(uint8_t); *len += sizeof(uint8_t); switch (d->dtd) { case SDP_TEXT_STR8: case SDP_URL_STR8: n = *(uint8_t *) p; p += sizeof(uint8_t); *len += sizeof(uint8_t) + n; break; case SDP_TEXT_STR16: case SDP_URL_STR16: n = ntohs(bt_get_unaligned((uint16_t *) p)); p += sizeof(uint16_t); *len += sizeof(uint16_t) + n; break; default: SDPERR("Sizeof text string > UINT16_MAX\n"); free(d); return 0; } s = malloc(n + 1); memset(s, 0, n + 1); memcpy(s, p, n); SDPDBG("Len : %d\n", n); SDPDBG("Str : %s\n", s); d->val.str = s; d->unitSize = n + sizeof(uint8_t); return d; } static sdp_data_t *extract_seq(const void *p, int *len, sdp_record_t *rec) { int seqlen, n = 0; sdp_data_t *curr, *prev; sdp_data_t *d = malloc(sizeof(sdp_data_t)); SDPDBG("Extracting SEQ"); memset(d, 0, sizeof(sdp_data_t)); *len = sdp_extract_seqtype(p, &d->dtd, &seqlen); SDPDBG("Sequence Type : 0x%x length : 0x%x\n", d->dtd, seqlen); if (*len == 0) return d; p += *len; curr = prev = NULL; while (n < seqlen) { int attrlen = 0; curr = sdp_extract_attr(p, &attrlen, rec); if (curr == NULL) break; if (prev) prev->next = curr; else d->val.dataseq = curr; prev = curr; p += attrlen; n += attrlen; SDPDBG("Extracted: %d SequenceLength: %d", n, seqlen); } *len += n; return d; } sdp_data_t *sdp_extract_attr(const uint8_t *p, int *size, sdp_record_t *rec) { sdp_data_t *elem; int n = 0; uint8_t dtd = *(const uint8_t *)p; SDPDBG("extract_attr: dtd=0x%x", dtd); switch (dtd) { case SDP_DATA_NIL: case SDP_BOOL: case SDP_UINT8: case SDP_UINT16: case SDP_UINT32: case SDP_UINT64: case SDP_UINT128: case SDP_INT8: case SDP_INT16: case SDP_INT32: case SDP_INT64: case SDP_INT128: elem = extract_int(p, &n); break; case SDP_UUID16: case SDP_UUID32: case SDP_UUID128: elem = extract_uuid(p, &n, rec); break; case SDP_TEXT_STR8: case SDP_TEXT_STR16: case SDP_TEXT_STR32: case SDP_URL_STR8: case SDP_URL_STR16: case SDP_URL_STR32: elem = extract_str(p, &n); break; case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: case SDP_ALT8: case SDP_ALT16: case SDP_ALT32: elem = extract_seq(p, &n, rec); break; default: SDPERR("Unknown data descriptor : 0x%x terminating\n", dtd); return NULL; } *size += n; return elem; } #ifdef SDP_DEBUG static void attr_print_func(void *value, void *userData) { sdp_data_t *d = (sdp_data_t *)value; SDPDBG("=====================================\n"); SDPDBG("ATTRIBUTE IDENTIFIER : 0x%x\n", d->attrId); SDPDBG("ATTRIBUTE VALUE PTR : 0x%x\n", (uint32_t)value); if (d) sdp_data_print(d); else SDPDBG("NULL value\n"); SDPDBG("=====================================\n"); } void sdp_print_service_attr(sdp_list_t *svcAttrList) { SDPDBG("Printing service attr list %p\n", svcAttrList); sdp_list_foreach(svcAttrList, attr_print_func, NULL); SDPDBG("Printed service attr list %p\n", svcAttrList); } #endif sdp_record_t *sdp_extract_pdu(const uint8_t *buf, int *scanned) { int extracted = 0, seqlen = 0; uint8_t dtd; uint16_t attr; sdp_record_t *rec = sdp_record_alloc(); const uint8_t *p = buf; *scanned = sdp_extract_seqtype(buf, &dtd, &seqlen); p += *scanned; rec->attrlist = NULL; while (extracted < seqlen) { int n = sizeof(uint8_t), attrlen = 0; sdp_data_t *data = NULL; SDPDBG("Extract PDU, sequenceLength: %d localExtractedLength: %d", seqlen, extracted); dtd = *(uint8_t *) p; attr = ntohs(bt_get_unaligned((uint16_t *) (p + n))); n += sizeof(uint16_t); SDPDBG("DTD of attrId : %d Attr id : 0x%x \n", dtd, attr); data = sdp_extract_attr(p + n, &attrlen, rec); SDPDBG("Attr id : 0x%x attrValueLength : %d\n", attr, attrlen); n += attrlen; if (data == NULL) { SDPDBG("Terminating extraction of attributes"); break; } if (attr == SDP_ATTR_RECORD_HANDLE) rec->handle = data->val.uint32; extracted += n; p += n; sdp_attr_replace(rec, attr, data); SDPDBG("Extract PDU, seqLength: %d localExtractedLength: %d", seqlen, extracted); } #ifdef SDP_DEBUG SDPDBG("Successful extracting of Svc Rec attributes\n"); sdp_print_service_attr(rec->attrlist); #endif *scanned += seqlen; return rec; } #ifdef SDP_DEBUG static void print_dataseq(sdp_data_t *p) { sdp_data_t *d; for (d = p; d; d = d->next) sdp_data_print(d); } #endif void sdp_record_print(const sdp_record_t *rec) { sdp_data_t *d = sdp_data_get(rec, SDP_ATTR_SVCNAME_PRIMARY); if (d) printf("Service Name: %s\n", d->val.str); d = sdp_data_get(rec, SDP_ATTR_SVCDESC_PRIMARY); if (d) printf("Service Description: %s\n", d->val.str); d = sdp_data_get(rec, SDP_ATTR_PROVNAME_PRIMARY); if (d) printf("Service Provider: %s\n", d->val.str); } #ifdef SDP_DEBUG void sdp_data_print(sdp_data_t *d) { switch (d->dtd) { case SDP_DATA_NIL: SDPDBG("NIL\n"); break; case SDP_BOOL: case SDP_UINT8: case SDP_UINT16: case SDP_UINT32: case SDP_UINT64: case SDP_UINT128: case SDP_INT8: case SDP_INT16: case SDP_INT32: case SDP_INT64: case SDP_INT128: SDPDBG("Integer : 0x%x\n", d->val.uint32); break; case SDP_UUID16: case SDP_UUID32: case SDP_UUID128: SDPDBG("UUID\n"); sdp_uuid_print(&d->val.uuid); break; case SDP_TEXT_STR8: case SDP_TEXT_STR16: case SDP_TEXT_STR32: SDPDBG("Text : %s\n", d->val.str); break; case SDP_URL_STR8: case SDP_URL_STR16: case SDP_URL_STR32: SDPDBG("URL : %s\n", d->val.str); break; case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: print_dataseq(d->val.dataseq); break; case SDP_ALT8: case SDP_ALT16: case SDP_ALT32: SDPDBG("Data Sequence Alternates\n"); print_dataseq(d->val.dataseq); break; } } #endif sdp_data_t *sdp_data_get(const sdp_record_t *rec, uint16_t attrId) { if (rec->attrlist) { sdp_data_t sdpTemplate; sdp_list_t *p; sdpTemplate.attrId = attrId; p = sdp_list_find(rec->attrlist, &sdpTemplate, sdp_attrid_comp_func); if (p) return (sdp_data_t *)p->data; } return 0; } /* * Extract the sequence type and its length, and return offset into buf * or 0 on failure. */ int sdp_extract_seqtype(const uint8_t *buf, uint8_t *dtdp, int *size) { uint8_t dtd = *(uint8_t *) buf; int scanned = sizeof(uint8_t); buf += sizeof(uint8_t); *dtdp = dtd; switch (dtd) { case SDP_SEQ8: case SDP_ALT8: *size = *(uint8_t *) buf; scanned += sizeof(uint8_t); break; case SDP_SEQ16: case SDP_ALT16: *size = ntohs(bt_get_unaligned((uint16_t *) buf)); scanned += sizeof(uint16_t); break; case SDP_SEQ32: case SDP_ALT32: *size = ntohl(bt_get_unaligned((uint32_t *) buf)); scanned += sizeof(uint32_t); break; default: SDPERR("Unknown sequence type, aborting\n"); return 0; } return scanned; } int sdp_send_req(sdp_session_t *session, uint8_t *buf, uint32_t size) { uint32_t sent = 0; while (sent < size) { int n = send(session->sock, buf + sent, size - sent, 0); if (n < 0) return -1; sent += n; } return 0; } int sdp_read_rsp(sdp_session_t *session, uint8_t *buf, uint32_t size) { fd_set readFds; struct timeval timeout = { SDP_RESPONSE_TIMEOUT, 0 }; FD_ZERO(&readFds); FD_SET(session->sock, &readFds); SDPDBG("Waiting for response\n"); if (select(session->sock + 1, &readFds, NULL, NULL, &timeout) == 0) { SDPERR("Client timed out\n"); errno = ETIMEDOUT; return -1; } return recv(session->sock, buf, size, 0); } /* * generic send request, wait for response method. */ int sdp_send_req_w4_rsp(sdp_session_t *session, uint8_t *reqbuf, uint8_t *rspbuf, uint32_t reqsize, uint32_t *rspsize) { int n; sdp_pdu_hdr_t *reqhdr = (sdp_pdu_hdr_t *)reqbuf; sdp_pdu_hdr_t *rsphdr = (sdp_pdu_hdr_t *)rspbuf; SDPDBG(""); if (0 > sdp_send_req(session, reqbuf, reqsize)) { SDPERR("Error sending data:%s", strerror(errno)); return -1; } n = sdp_read_rsp(session, rspbuf, SDP_RSP_BUFFER_SIZE); if (0 > n) return -1; SDPDBG("Read : %d\n", n); if (n == 0 || reqhdr->tid != rsphdr->tid) { errno = EPROTO; return -1; } *rspsize = n; return 0; } /* * singly-linked lists (after openobex implementation) */ sdp_list_t *sdp_list_append(sdp_list_t *p, void *d) { sdp_list_t *q, *n = malloc(sizeof(sdp_list_t)); if (!n) return 0; n->data = d; n->next = 0; if (!p) return n; for (q = p; q->next; q = q->next); q->next = n; return p; } sdp_list_t *sdp_list_remove(sdp_list_t *list, void *d) { sdp_list_t *p, *q; for (q = 0, p = list; p; q = p, p = p->next) if (p->data == d) { if (q) q->next = p->next; else list = p->next; free(p); break; } return list; } sdp_list_t *sdp_list_insert_sorted(sdp_list_t *list, void *d, sdp_comp_func_t f) { sdp_list_t *q, *p, *n; n = malloc(sizeof(sdp_list_t)); if (!n) return 0; n->data = d; for (q = 0, p = list; p; q = p, p = p->next) if (f(p->data, d) >= 0) break; // insert between q and p; if !q insert at head if (q) q->next = n; else list = n; n->next = p; return list; } /* * Every element of the list points to things which need * to be free()'d. This method frees the list's contents */ void sdp_list_free(sdp_list_t *list, sdp_free_func_t f) { sdp_list_t *next; while (list) { next = list->next; if (f) f(list->data); free(list); list = next; } } static inline int __find_port(sdp_data_t *seq, int proto) { if (!seq || !seq->next) return 0; if (SDP_IS_UUID(seq->dtd) && sdp_uuid_to_proto(&seq->val.uuid) == proto) { seq = seq->next; switch (seq->dtd) { case SDP_UINT8: return seq->val.uint8; case SDP_UINT16: return seq->val.uint16; } } return 0; } int sdp_get_proto_port(const sdp_list_t *list, int proto) { if (proto != L2CAP_UUID && proto != RFCOMM_UUID) { errno = EINVAL; return -1; } for (; list; list = list->next) { sdp_list_t *p; for (p = list->data; p; p = p->next) { sdp_data_t *seq = (sdp_data_t *) p->data; int port = __find_port(seq, proto); if (port) return port; } } return 0; } sdp_data_t *sdp_get_proto_desc(sdp_list_t *list, int proto) { for (; list; list = list->next) { sdp_list_t *p; for (p = list->data; p; p = p->next) { sdp_data_t *seq = (sdp_data_t *) p->data; if (SDP_IS_UUID(seq->dtd) && sdp_uuid_to_proto(&seq->val.uuid) == proto) return seq->next; } } return NULL; } int sdp_get_access_protos(const sdp_record_t *rec, sdp_list_t **pap) { sdp_data_t *pdlist, *curr; sdp_list_t *ap = 0; pdlist = sdp_data_get(rec, SDP_ATTR_PROTO_DESC_LIST); if (pdlist == NULL) { errno = ENODATA; return -1; } SDPDBG("AP type : 0%x\n", pdlist->dtd); for (; pdlist; pdlist = pdlist->next) { sdp_list_t *pds = 0; for (curr = pdlist->val.dataseq; curr; curr = curr->next) pds = sdp_list_append(pds, curr->val.dataseq); ap = sdp_list_append(ap, pds); } *pap = ap; return 0; } int sdp_get_add_access_protos(const sdp_record_t *rec, sdp_list_t **pap) { sdp_data_t *pdlist, *curr; sdp_list_t *ap = 0; pdlist = sdp_data_get(rec, SDP_ATTR_ADD_PROTO_DESC_LIST); if (pdlist == NULL) { errno = ENODATA; return -1; } SDPDBG("AP type : 0%x\n", pdlist->dtd); pdlist = pdlist->val.dataseq; for (; pdlist; pdlist = pdlist->next) { sdp_list_t *pds = 0; for (curr = pdlist->val.dataseq; curr; curr = curr->next) pds = sdp_list_append(pds, curr->val.dataseq); ap = sdp_list_append(ap, pds); } *pap = ap; return 0; } int sdp_get_uuidseq_attr(const sdp_record_t *rec, uint16_t attr, sdp_list_t **seqp) { sdp_data_t *sdpdata = sdp_data_get(rec, attr); *seqp = NULL; if (sdpdata && sdpdata->dtd >= SDP_SEQ8 && sdpdata->dtd <= SDP_SEQ32) { sdp_data_t *d; for (d = sdpdata->val.dataseq; d; d = d->next) { uuid_t *u = malloc(sizeof(uuid_t)); memset((char *)u, 0, sizeof(uuid_t)); if (d->dtd >= SDP_UUID16 && d->dtd <= SDP_UUID128) { *u = d->val.uuid; *seqp = sdp_list_append(*seqp, u); } else goto fail; } return 0; } fail: sdp_list_free(*seqp, free); errno = EINVAL; return -1; } int sdp_set_uuidseq_attr(sdp_record_t *rec, uint16_t aid, sdp_list_t *seq) { int status = 0, i, len; void **dtds, **values; uint8_t uuid16 = SDP_UUID16; uint8_t uuid32 = SDP_UUID32; uint8_t uuid128 = SDP_UUID128; sdp_list_t *p; len = sdp_list_len(seq); if (!seq || len == 0) return -1; dtds = (void **)malloc(len * sizeof(void *)); values = (void **)malloc(len * sizeof(void *)); for (p = seq, i = 0; i < len; i++, p = p->next) { uuid_t *uuid = (uuid_t *)p->data; if (uuid) switch (uuid->type) { case SDP_UUID16: dtds[i] = &uuid16; values[i] = &uuid->value.uuid16; break; case SDP_UUID32: dtds[i] = &uuid32; values[i] = &uuid->value.uuid32; break; case SDP_UUID128: dtds[i] = &uuid128; values[i] = &uuid->value.uuid128; break; default: status = -1; break; } else { status = -1; break; } } if (status == 0) { sdp_data_t *data = sdp_seq_alloc(dtds, values, len); sdp_attr_replace(rec, aid, data); sdp_pattern_add_uuidseq(rec, seq); } free(dtds); free(values); return status; } int sdp_get_lang_attr(const sdp_record_t *rec, sdp_list_t **langSeq) { sdp_lang_attr_t *lang; sdp_data_t *sdpdata, *curr_data; *langSeq = NULL; sdpdata = sdp_data_get(rec, SDP_ATTR_LANG_BASE_ATTR_ID_LIST); if (sdpdata == NULL) { errno = ENODATA; return -1; } curr_data = sdpdata->val.dataseq; while (curr_data) { sdp_data_t *pCode = curr_data; sdp_data_t *pEncoding = pCode->next; sdp_data_t *pOffset = pEncoding->next; if (pCode && pEncoding && pOffset) { lang = malloc(sizeof(sdp_lang_attr_t)); lang->code_ISO639 = pCode->val.uint16; lang->encoding = pEncoding->val.uint16; lang->base_offset = pOffset->val.uint16; SDPDBG("code_ISO639 : 0x%02x\n", lang->code_ISO639); SDPDBG("encoding : 0x%02x\n", lang->encoding); SDPDBG("base_offfset : 0x%02x\n", lang->base_offset); *langSeq = sdp_list_append(*langSeq, lang); } curr_data = pOffset->next; } return 0; } int sdp_get_profile_descs(const sdp_record_t *rec, sdp_list_t **profDescSeq) { sdp_profile_desc_t *profDesc; sdp_data_t *sdpdata, *seq; *profDescSeq = NULL; sdpdata = sdp_data_get(rec, SDP_ATTR_PFILE_DESC_LIST); if (!sdpdata || !sdpdata->val.dataseq) { errno = ENODATA; return -1; } for (seq = sdpdata->val.dataseq; seq && seq->val.dataseq; seq = seq->next) { uuid_t *uuid = NULL; uint16_t version = 0x100; if (SDP_IS_UUID(seq->dtd)) { uuid = &seq->val.uuid; } else { sdp_data_t *puuid = seq->val.dataseq; sdp_data_t *pVnum = seq->val.dataseq->next; if (puuid && pVnum) { uuid = &puuid->val.uuid; version = pVnum->val.uint16; } } if (uuid != NULL) { profDesc = malloc(sizeof(sdp_profile_desc_t)); profDesc->uuid = *uuid; profDesc->version = version; #ifdef SDP_DEBUG sdp_uuid_print(&profDesc->uuid); SDPDBG("Vnum : 0x%04x\n", profDesc->version); #endif *profDescSeq = sdp_list_append(*profDescSeq, profDesc); } } return 0; } int sdp_get_server_ver(const sdp_record_t *rec, sdp_list_t **u16) { sdp_data_t *d, *curr; *u16 = NULL; d = sdp_data_get(rec, SDP_ATTR_VERSION_NUM_LIST); if (d == NULL) { errno = ENODATA; return -1; } for (curr = d->val.dataseq; curr; curr = curr->next) *u16 = sdp_list_append(*u16, &curr->val.uint16); return 0; } /* flexible extraction of basic attributes - Jean II */ /* How do we expect caller to extract predefined data sequences? */ int sdp_get_int_attr(const sdp_record_t *rec, uint16_t attrid, int *value) { sdp_data_t *sdpdata = sdp_data_get(rec, attrid); if (sdpdata) /* Verify that it is what the caller expects */ if (sdpdata->dtd == SDP_BOOL || sdpdata->dtd == SDP_UINT8 || sdpdata->dtd == SDP_UINT16 || sdpdata->dtd == SDP_UINT32 || sdpdata->dtd == SDP_INT8 || sdpdata->dtd == SDP_INT16 || sdpdata->dtd == SDP_INT32) { *value = sdpdata->val.uint32; return 0; } errno = EINVAL; return -1; } int sdp_get_string_attr(const sdp_record_t *rec, uint16_t attrid, char *value, int valuelen) { sdp_data_t *sdpdata = sdp_data_get(rec, attrid); if (sdpdata) /* Verify that it is what the caller expects */ if (sdpdata->dtd == SDP_TEXT_STR8 || sdpdata->dtd == SDP_TEXT_STR16 || sdpdata->dtd == SDP_TEXT_STR32) if (strlen(sdpdata->val.str) < valuelen) { strcpy(value, sdpdata->val.str); return 0; } errno = EINVAL; return -1; } #define get_basic_attr(attrID, pAttrValue, fieldName) \ sdp_data_t *data = sdp_data_get(rec, attrID); \ if (data) { \ *pAttrValue = data->val.fieldName; \ return 0; \ } \ errno = EINVAL; \ return -1; int sdp_get_service_id(const sdp_record_t *rec, uuid_t *uuid) { get_basic_attr(SDP_ATTR_SERVICE_ID, uuid, uuid); } int sdp_get_group_id(const sdp_record_t *rec, uuid_t *uuid) { get_basic_attr(SDP_ATTR_GROUP_ID, uuid, uuid); } int sdp_get_record_state(const sdp_record_t *rec, uint32_t *svcRecState) { get_basic_attr(SDP_ATTR_RECORD_STATE, svcRecState, uint32); } int sdp_get_service_avail(const sdp_record_t *rec, uint8_t *svcAvail) { get_basic_attr(SDP_ATTR_SERVICE_AVAILABILITY, svcAvail, uint8); } int sdp_get_service_ttl(const sdp_record_t *rec, uint32_t *svcTTLInfo) { get_basic_attr(SDP_ATTR_SVCINFO_TTL, svcTTLInfo, uint32); } int sdp_get_database_state(const sdp_record_t *rec, uint32_t *svcDBState) { get_basic_attr(SDP_ATTR_SVCDB_STATE, svcDBState, uint32); } /* * NOTE that none of the setXXX() functions below will * actually update the SDP server, unless the * {register, update}sdp_record_t() function is invoked. */ int sdp_attr_add_new(sdp_record_t *rec, uint16_t attr, uint8_t dtd, const void *value) { sdp_data_t *d = sdp_data_alloc(dtd, value); if (d) { sdp_attr_replace(rec, attr, d); return 0; } return -1; } /* * Set the information attributes of the service * pointed to by rec. The attributes are * service name, description and provider name */ void sdp_set_info_attr(sdp_record_t *rec, const char *name, const char *prov, const char *desc) { if (name) sdp_attr_add_new(rec, SDP_ATTR_SVCNAME_PRIMARY, SDP_TEXT_STR8, (void *)name); if (prov) sdp_attr_add_new(rec, SDP_ATTR_PROVNAME_PRIMARY, SDP_TEXT_STR8, (void *)prov); if (desc) sdp_attr_add_new(rec, SDP_ATTR_SVCDESC_PRIMARY, SDP_TEXT_STR8, (void *)desc); } static sdp_data_t *access_proto_to_dataseq(sdp_record_t *rec, sdp_list_t *proto) { sdp_data_t *seq = NULL; void *dtds[10], *values[10]; void **seqDTDs, **seqs; int i, seqlen; sdp_list_t *p; seqlen = sdp_list_len(proto); seqDTDs = (void **)malloc(seqlen * sizeof(void *)); seqs = (void **)malloc(seqlen * sizeof(void *)); for (i = 0, p = proto; p; p = p->next, i++) { sdp_list_t *elt = (sdp_list_t *)p->data; sdp_data_t *s; int pslen = 0; for (; elt && pslen < sizeof(dtds); elt = elt->next, pslen++) { sdp_data_t *d = (sdp_data_t *)elt->data; dtds[pslen] = &d->dtd; switch (d->dtd) { case SDP_UUID16: values[pslen] = &((uuid_t *)d)->value.uuid16; break; case SDP_UUID32: values[pslen] = &((uuid_t *)d)->value.uuid32; break; case SDP_UUID128: values[pslen] = &((uuid_t *)d)->value.uuid128; break; case SDP_UINT8: values[pslen] = &d->val.uint8; break; case SDP_UINT16: values[pslen] = &d->val.uint16; break; case SDP_SEQ8: case SDP_SEQ16: case SDP_SEQ32: values[pslen] = d; break; // FIXME: more } } s = sdp_seq_alloc(dtds, values, pslen); if (s) { seqDTDs[i] = &s->dtd; seqs[i] = s; } } seq = sdp_seq_alloc(seqDTDs, seqs, seqlen); free(seqDTDs); free(seqs); return seq; } /* * sets the access protocols of the service specified * to the value specified in "access_proto" * * Note that if there are alternate mechanisms by * which the service is accessed, then they should * be specified as sequences * * Using a value of NULL for accessProtocols has * effect of removing this attribute (if previously set) * * This function replaces the existing sdp_access_proto_t * structure (if any) with the new one specified. * * returns 0 if successful or -1 if there is a failure. */ int sdp_set_access_protos(sdp_record_t *rec, const sdp_list_t *ap) { const sdp_list_t *p; sdp_data_t *protos = NULL; for (p = ap; p; p = p->next) { sdp_data_t *seq = access_proto_to_dataseq(rec, (sdp_list_t *) p->data); protos = sdp_seq_append(protos, seq); } sdp_attr_add(rec, SDP_ATTR_PROTO_DESC_LIST, protos); return 0; } int sdp_set_add_access_protos(sdp_record_t *rec, const sdp_list_t *ap) { const sdp_list_t *p; sdp_data_t *protos = NULL; for (p = ap; p; p = p->next) { sdp_data_t *seq = access_proto_to_dataseq(rec, (sdp_list_t *) p->data); protos = sdp_seq_append(protos, seq); } sdp_attr_add(rec, SDP_ATTR_ADD_PROTO_DESC_LIST, protos ? sdp_data_alloc(SDP_SEQ8, protos) : NULL); return 0; } /* * set the "LanguageBase" attributes of the service record * record to the value specified in "langAttrList". * * "langAttrList" is a linked list of "sdp_lang_attr_t" * objects, one for each language in which user visible * attributes are present in the service record. * * Using a value of NULL for langAttrList has * effect of removing this attribute (if previously set) * * This function replaces the exisiting sdp_lang_attr_t * structure (if any) with the new one specified. * * returns 0 if successful or -1 if there is a failure. */ int sdp_set_lang_attr(sdp_record_t *rec, const sdp_list_t *seq) { uint8_t uint16 = SDP_UINT16; int status = 0, i = 0, seqlen = sdp_list_len(seq); void **dtds = (void **)malloc(3 * seqlen * sizeof(void *)); void **values = (void **)malloc(3 * seqlen * sizeof(void *)); const sdp_list_t *p; for (p = seq; p; p = p->next) { sdp_lang_attr_t *lang = (sdp_lang_attr_t *)p->data; if (!lang) { status = -1; break; } dtds[i] = &uint16; values[i] = &lang->code_ISO639; i++; dtds[i] = &uint16; values[i] = &lang->encoding; i++; dtds[i] = &uint16; values[i] = &lang->base_offset; i++; } if (status == 0) { sdp_data_t *seq = sdp_seq_alloc(dtds, values, 3 * seqlen); sdp_attr_add(rec, SDP_ATTR_LANG_BASE_ATTR_ID_LIST, seq); } free(dtds); free(values); return status; } /* * set the "ServiceID" attribute of the service. * * This is the UUID of the service. * * returns 0 if successful or -1 if there is a failure. */ void sdp_set_service_id(sdp_record_t *rec, uuid_t uuid) { switch (uuid.type) { case SDP_UUID16: sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID16, &uuid.value.uuid16); break; case SDP_UUID32: sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID32, &uuid.value.uuid32); break; case SDP_UUID128: sdp_attr_add_new(rec, SDP_ATTR_SERVICE_ID, SDP_UUID128, &uuid.value.uuid128); break; } sdp_pattern_add_uuid(rec, &uuid); } /* * set the GroupID attribute of the service record defining a group. * * This is the UUID of the group. * * returns 0 if successful or -1 if there is a failure. */ void sdp_set_group_id(sdp_record_t *rec, uuid_t uuid) { switch (uuid.type) { case SDP_UUID16: sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID16, &uuid.value.uuid16); break; case SDP_UUID32: sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID32, &uuid.value.uuid32); break; case SDP_UUID128: sdp_attr_add_new(rec, SDP_ATTR_GROUP_ID, SDP_UUID128, &uuid.value.uuid128); break; } sdp_pattern_add_uuid(rec, &uuid); } /* * set the ProfileDescriptorList attribute of the service record * pointed to by record to the value specified in "profileDesc". * * Each element in the list is an object of type * sdp_profile_desc_t which is a definition of the * Bluetooth profile that this service conforms to. * * Using a value of NULL for profileDesc has * effect of removing this attribute (if previously set) * * This function replaces the exisiting ProfileDescriptorList * structure (if any) with the new one specified. * * returns 0 if successful or -1 if there is a failure. */ int sdp_set_profile_descs(sdp_record_t *rec, const sdp_list_t *profiles) { int status = 0; uint8_t uuid16 = SDP_UUID16; uint8_t uuid32 = SDP_UUID32; uint8_t uuid128 = SDP_UUID128; uint8_t uint16 = SDP_UINT16; int i = 0, seqlen = sdp_list_len(profiles); void **seqDTDs = (void **)malloc(seqlen * sizeof(void *)); void **seqs = (void **)malloc(seqlen * sizeof(void *)); const sdp_list_t *p; for (p = profiles; p; p = p->next) { sdp_data_t *seq; void *dtds[2], *values[2]; sdp_profile_desc_t *profile = (sdp_profile_desc_t *)p->data; if (!profile) { status = -1; break; } switch (profile->uuid.type) { case SDP_UUID16: dtds[0] = &uuid16; values[0] = &profile->uuid.value.uuid16; break; case SDP_UUID32: dtds[0] = &uuid32; values[0] = &profile->uuid.value.uuid32; break; case SDP_UUID128: dtds[0] = &uuid128; values[0] = &profile->uuid.value.uuid128; break; default: status = -1; break; } dtds[1] = &uint16; values[1] = &profile->version; seq = sdp_seq_alloc(dtds, values, 2); if (seq) { seqDTDs[i] = &seq->dtd; seqs[i] = seq; sdp_pattern_add_uuid(rec, &profile->uuid); } i++; } if (status == 0) { sdp_data_t *pAPSeq = sdp_seq_alloc(seqDTDs, seqs, seqlen); sdp_attr_add(rec, SDP_ATTR_PFILE_DESC_LIST, pAPSeq); } free(seqDTDs); free(seqs); return status; } /* * sets various URL attributes of the service * pointed to by record. The URL include * * client: a URL to the client's * platform specific (WinCE, PalmOS) executable * code that can be used to access this service. * * doc: a URL pointing to service documentation * * icon: a URL to an icon that can be used to represent * this service. * * Note that you need to pass NULL for any URLs * that you don't want to set or remove */ void sdp_set_url_attr(sdp_record_t *rec, const char *client, const char *doc, const char *icon) { sdp_attr_add_new(rec, SDP_ATTR_CLNT_EXEC_URL, SDP_URL_STR8, client); sdp_attr_add_new(rec, SDP_ATTR_DOC_URL, SDP_URL_STR8, doc); sdp_attr_add_new(rec, SDP_ATTR_ICON_URL, SDP_URL_STR8, icon); } /* * The code in this function is executed only once per * thread. We compute the actual bit value of the Bluetooth * base UUID which is a string defined in bt_std_values.h * and is assumed to be of the standard form with "-" separators. * * The algorithm however converts the string to 4 unsigned longs * using the strtoul() and assigns the values in sequence to * the 128bit value */ uint128_t *sdp_create_base_uuid(void) { char baseStr[128]; int delim = '-'; unsigned long dataLongValue; char *delimPtr; char *dataPtr; char temp[10]; int toBeCopied; uint8_t *data; if (bluetooth_base_uuid == NULL) { strcpy(baseStr, BASE_UUID); bluetooth_base_uuid = malloc(sizeof(uint128_t)); data = bluetooth_base_uuid->data; memset(data, '\0', sizeof(uint128_t)); memset(temp, '\0', 10); dataPtr = baseStr; delimPtr = NULL; delimPtr = strchr(dataPtr, delim); toBeCopied = delimPtr - dataPtr; if (toBeCopied != 8) { SDPDBG("To be copied(1) : %d\n", toBeCopied); return NULL; } strncpy(temp, dataPtr, toBeCopied); dataLongValue = htonl(strtoul(temp, NULL, 16)); memcpy(&data[0], &dataLongValue, 4); /* * Get the next 4 bytes (note that there is a "-" * between them now) */ memset(temp, '\0', 10); dataPtr = delimPtr + 1; delimPtr = strchr(dataPtr, delim); toBeCopied = delimPtr - dataPtr; if (toBeCopied != 4) { SDPDBG("To be copied(2) : %d\n", toBeCopied); return NULL; } strncpy(temp, dataPtr, toBeCopied); dataPtr = delimPtr + 1; delimPtr = strchr(dataPtr, delim); toBeCopied = delimPtr - dataPtr; if (toBeCopied != 4) { SDPDBG("To be copied(3) : %d\n", toBeCopied); return NULL; } strncat(temp, dataPtr, toBeCopied); dataLongValue = htonl(strtoul(temp, NULL, 16)); memcpy(&data[4], &dataLongValue, 4); /* * Get the last 4 bytes (note that there are 6 bytes * after the last separator, which is truncated (2+4) */ memset(temp, '\0', 10); dataPtr = delimPtr + 1; dataPtr = delimPtr + 1; delimPtr = strchr(dataPtr, delim); toBeCopied = delimPtr - dataPtr; if (toBeCopied != 4) { SDPDBG("To be copied(4) : %d\n", toBeCopied); return NULL; } strncpy(temp, dataPtr, toBeCopied); strncat(temp, (delimPtr + 1), 4); dataLongValue = htonl(strtoul(temp, NULL, 16)); memcpy(&data[8], &dataLongValue, 4); dataLongValue = htonl(strtoul(delimPtr + 5, NULL, 16)); memcpy(&data[12], &dataLongValue, 4); } return bluetooth_base_uuid; } uuid_t *sdp_uuid16_create(uuid_t *u, uint16_t val) { memset(u, 0, sizeof(uuid_t)); u->type = SDP_UUID16; u->value.uuid16 = val; return u; } uuid_t *sdp_uuid32_create(uuid_t *u, uint32_t val) { memset(u, 0, sizeof(uuid_t)); u->type = SDP_UUID32; u->value.uuid32 = val; return u; } uuid_t *sdp_uuid128_create(uuid_t *u, const void *val) { memset(u, 0, sizeof(uuid_t)); u->type = SDP_UUID128; memcpy(&u->value.uuid128, val, sizeof(uint128_t)); return u; } /* * UUID comparison function * returns 0 if uuidValue1 == uuidValue2 else -1 */ int sdp_uuid16_cmp(const void *p1, const void *p2) { const uuid_t *u1 = (const uuid_t *)p1; const uuid_t *u2 = (const uuid_t *)p2; return memcmp(&u1->value.uuid16, &u2->value.uuid16, sizeof(uint16_t)); } /* * UUID comparison function * returns 0 if uuidValue1 == uuidValue2 else -1 */ int sdp_uuid128_cmp(const void *p1, const void *p2) { const uuid_t *u1 = (const uuid_t *)p1; const uuid_t *u2 = (const uuid_t *)p2; return memcmp(&u1->value.uuid128, &u2->value.uuid128, sizeof(uint128_t)); } /* * 128 to 16 bit and 32 to 16 bit UUID conversion functions * yet to be implemented. Note that the input is in NBO in * both 32 and 128 bit UUIDs and conversion is needed */ void sdp_uuid16_to_uuid128(uuid_t *uuid128, uuid_t *uuid16) { /* * We have a 16 bit value, which needs to be added to * bytes 3 and 4 (at indices 2 and 3) of the Bluetooth base */ unsigned short data1; // allocate a 128bit UUID and init to the Bluetooth base UUID uint128_t *pBTBase128Bit = sdp_create_base_uuid(); uuid128->value.uuid128 = *pBTBase128Bit; uuid128->type = SDP_UUID128; // extract bytes 2 and 3 of 128bit BT base UUID memcpy(&data1, &pBTBase128Bit->data[2], 2); // add the given UUID (16 bits) data1 += htons(uuid16->value.uuid16); // set bytes 2 and 3 of the 128 bit value memcpy(&uuid128->value.uuid128.data[2], &data1, 2); } void sdp_uuid32_to_uuid128(uuid_t *uuid128, uuid_t *uuid32) { /* * We have a 32 bit value, which needs to be added to * bytes 1->4 (at indices 0 thru 3) of the Bluetooth base */ unsigned int data0; // allocate a 128bit UUID and init to the Bluetooth base UUID uint128_t *pBTBase128Bit = sdp_create_base_uuid(); uuid128->value.uuid128 = *pBTBase128Bit; uuid128->type = SDP_UUID128; // extract first 4 bytes memcpy(&data0, &pBTBase128Bit->data[0], 4); // add the given UUID (32bits) data0 += htonl(uuid32->value.uuid32); // set the 4 bytes of the 128 bit value memcpy(&uuid128->value.uuid128.data[0], &data0, 4); } uuid_t *sdp_uuid_to_uuid128(uuid_t *uuid) { uuid_t *uuid128 = bt_malloc(sizeof(uuid_t)); memset(uuid128, 0, sizeof(uuid_t)); switch (uuid->type) { case SDP_UUID128: *uuid128 = *uuid; break; case SDP_UUID32: sdp_uuid32_to_uuid128(uuid128, uuid); break; case SDP_UUID16: sdp_uuid16_to_uuid128(uuid128, uuid); break; } return uuid128; } /* * converts a 128-bit uuid to a 16/32-bit one if possible * returns true if uuid contains a 16/32-bit UUID at exit */ int sdp_uuid128_to_uuid(uuid_t *uuid) { extern uint128_t *sdp_create_base_uuid(); int i; uint128_t *b = sdp_create_base_uuid(); uint128_t *u = &uuid->value.uuid128; uint32_t data; if (uuid->type != SDP_UUID128) return 1; for (i = 4; i < sizeof(b->data); i++) if (b->data[i] != u->data[i]) return 0; memcpy(&data, u->data, 4); data = htonl(data); if (data <= 0xffff) { uuid->type = SDP_UUID16; uuid->value.uuid16 = (uint16_t)data; } else { uuid->type = SDP_UUID32; uuid->value.uuid32 = data; } return 1; } /* * convert a UUID to the 16-bit short-form */ int sdp_uuid_to_proto(uuid_t *uuid) { uuid_t u = *uuid; if (sdp_uuid128_to_uuid(&u)) { switch (u.type) { case SDP_UUID16: return u.value.uuid16; case SDP_UUID32: return u.value.uuid32; } } return 0; } int sdp_uuid_extract(const uint8_t *p, uuid_t *uuid, int *scanned) { uint8_t type = *(const uint8_t *) p; if (!SDP_IS_UUID(type)) { SDPERR("Unknown data type : %d expecting a svc UUID\n", type); return -1; } p += sizeof(uint8_t); *scanned += sizeof(uint8_t); if (type == SDP_UUID16) { sdp_uuid16_create(uuid, ntohs(bt_get_unaligned((uint16_t *) p))); *scanned += sizeof(uint16_t); p += sizeof(uint16_t); } else if (type == SDP_UUID32) { sdp_uuid32_create(uuid, ntohl(bt_get_unaligned((uint32_t *) p))); *scanned += sizeof(uint32_t); p += sizeof(uint32_t); } else { sdp_uuid128_create(uuid, p); *scanned += sizeof(uint128_t); p += sizeof(uint128_t); } return 0; } /* * This function appends data to the PDU buffer "dst" from source "src". * The data length is also computed and set. * Should the PDU length exceed 2^8, then sequence type is * set accordingly and the data is memmove()'d. */ void sdp_append_to_buf(sdp_buf_t *dst, uint8_t *data, uint32_t len) { uint8_t *p = dst->data; uint8_t dtd = *(uint8_t *) p; SDPDBG("Append src size: %d\n", len); SDPDBG("Append dst size: %d\n", dst->data_size); SDPDBG("Dst buffer size: %d\n", dst->buf_size); if (dst->data_size + len > dst->buf_size) { int need = SDP_PDU_CHUNK_SIZE * ((len / SDP_PDU_CHUNK_SIZE) + 1); dst->data = realloc(dst->data, dst->buf_size + need); SDPDBG("Realloc'ing : %d\n", need); if (dst->data == NULL) { SDPERR("Realloc fails \n"); } dst->buf_size += need; } if (dst->data_size == 0 && dtd == 0) { // create initial sequence *(uint8_t *)p = SDP_SEQ8; p += sizeof(uint8_t); dst->data_size += sizeof(uint8_t); // reserve space for sequence size p += sizeof(uint8_t); dst->data_size += sizeof(uint8_t); } memcpy(dst->data + dst->data_size, data, len); dst->data_size += len; dtd = *(uint8_t *)dst->data; if (dst->data_size > UCHAR_MAX && dtd == SDP_SEQ8) { short offset = sizeof(uint8_t) + sizeof(uint8_t); memmove(dst->data + offset + 1, dst->data + offset, dst->data_size - offset); p = dst->data; *(uint8_t *) p = SDP_SEQ16; p += sizeof(uint8_t); dst->data_size += 1; } p = dst->data; dtd = *(uint8_t *) p; p += sizeof(uint8_t); switch (dtd) { case SDP_SEQ8: *(uint8_t *) p = dst->data_size - sizeof(uint8_t) - sizeof(uint8_t); break; case SDP_SEQ16: bt_put_unaligned(htons(dst->data_size - sizeof(uint8_t) - sizeof(uint16_t)), (uint16_t *) p); break; case SDP_SEQ32: bt_put_unaligned(htonl(dst->data_size - sizeof(uint8_t) - sizeof(uint32_t)), (uint32_t *) p); break; } } void sdp_append_to_pdu(sdp_buf_t *pdu, sdp_data_t *d) { uint8_t buf[SDP_SEQ_PDUFORM_SIZE]; sdp_buf_t append; append.data = buf; append.buf_size = sizeof(buf); append.data_size = 0; sdp_set_attrid(&append, d->attrId); sdp_gen_pdu(&append, d); sdp_append_to_buf(pdu, append.data, append.data_size); } /* * Registers an sdp record. * * It is incorrect to call this method on a record that * has been already registered with the server. * * Returns zero on success, otherwise -1 (and sets errno). */ int sdp_device_record_register(sdp_session_t *session, bdaddr_t *device, sdp_record_t *rec, uint8_t flags) { int status = 0; uint8_t *req, *rsp, *p; uint32_t reqsize, rspsize; sdp_pdu_hdr_t *reqhdr, *rsphdr; sdp_buf_t pdu; SDPDBG(""); if (!session->local) { errno = EREMOTE; return -1; } req = malloc(SDP_REQ_BUFFER_SIZE); rsp = malloc(SDP_RSP_BUFFER_SIZE); if (req == NULL || rsp == NULL) { status = -1; errno = ENOMEM; goto end; } if (rec->handle && rec->handle != 0xffffffff) { uint32_t handle = rec->handle; sdp_data_t *data = sdp_data_alloc(SDP_UINT32, &handle); sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, data); } reqhdr = (sdp_pdu_hdr_t *)req; reqhdr->pdu_id = SDP_SVC_REGISTER_REQ; reqhdr->tid = htons(sdp_gen_tid(session)); reqsize = sizeof(sdp_pdu_hdr_t) + 1; p = req + sizeof(sdp_pdu_hdr_t); if (bacmp(device, BDADDR_ANY)) { *p++ = flags | SDP_DEVICE_RECORD; bacpy((bdaddr_t *) p, device); p += sizeof(bdaddr_t); reqsize += sizeof(bdaddr_t); } else *p++ = flags; if (sdp_gen_record_pdu(rec, &pdu) < 0) { status = -1; errno = ENOMEM; goto end; } memcpy(p, pdu.data, pdu.data_size); free(pdu.data); reqsize += pdu.data_size; reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); status = sdp_send_req_w4_rsp(session, req, rsp, reqsize, &rspsize); if (status < 0) goto end; rsphdr = (sdp_pdu_hdr_t *) rsp; p = rsp + sizeof(sdp_pdu_hdr_t); if (rsphdr->pdu_id == SDP_SVC_REGISTER_RSP) { uint32_t handle = ntohl(bt_get_unaligned((uint32_t *) p)); sdp_data_t *data = sdp_data_alloc(SDP_UINT32, &handle); rec->handle = handle; sdp_attr_replace(rec, SDP_ATTR_RECORD_HANDLE, data); } end: if (req) free(req); if (rsp) free(rsp); return status; } int sdp_record_register(sdp_session_t *session, sdp_record_t *rec, uint8_t flags) { return sdp_device_record_register(session, BDADDR_ANY, rec, flags); } /* * unregister a service record */ int sdp_device_record_unregister(sdp_session_t *session, bdaddr_t *device, sdp_record_t *rec) { int status = 0; uint8_t *reqbuf, *rspbuf, *p; uint32_t reqsize = 0, rspsize = 0; sdp_pdu_hdr_t *reqhdr, *rsphdr; uint32_t handle = 0; SDPDBG(""); handle = rec->handle; if (handle == SDP_SERVER_RECORD_HANDLE) { errno = EINVAL; return -1; } if (!session->local) { errno = EREMOTE; return -1; } reqbuf = malloc(SDP_REQ_BUFFER_SIZE); rspbuf = malloc(SDP_RSP_BUFFER_SIZE); if (!reqbuf || !rspbuf) { errno = ENOMEM; status = -1; goto end; } reqhdr = (sdp_pdu_hdr_t *) reqbuf; reqhdr->pdu_id = SDP_SVC_REMOVE_REQ; reqhdr->tid = htons(sdp_gen_tid(session)); p = reqbuf + sizeof(sdp_pdu_hdr_t); reqsize = sizeof(sdp_pdu_hdr_t); bt_put_unaligned(htonl(handle), (uint32_t *) p); reqsize += sizeof(uint32_t); reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize); if (status == 0) { rsphdr = (sdp_pdu_hdr_t *) rspbuf; p = rspbuf + sizeof(sdp_pdu_hdr_t); status = bt_get_unaligned((uint16_t *) p); if (status == 0 && rsphdr->pdu_id == SDP_SVC_REMOVE_RSP) { SDPDBG("Removing local copy\n"); sdp_record_free(rec); } } end: if (reqbuf) free(reqbuf); if (rspbuf) free(rspbuf); return status; } int sdp_record_unregister(sdp_session_t *session, sdp_record_t *rec) { return sdp_device_record_unregister(session, BDADDR_ANY, rec); } /* * modify an existing service record */ int sdp_device_record_update(sdp_session_t *session, bdaddr_t *device, const sdp_record_t *rec) { int status = 0; uint8_t *reqbuf, *rspbuf, *p; uint32_t reqsize, rspsize; sdp_pdu_hdr_t *reqhdr, *rsphdr; uint32_t handle; sdp_buf_t pdu; SDPDBG(""); handle = rec->handle; if (handle == SDP_SERVER_RECORD_HANDLE) { errno = EINVAL; return -1; } if (!session->local) { errno = EREMOTE; return -1; } reqbuf = malloc(SDP_REQ_BUFFER_SIZE); rspbuf = malloc(SDP_RSP_BUFFER_SIZE); if (!reqbuf || !rspbuf) { errno = ENOMEM; status = -1; goto end; } reqhdr = (sdp_pdu_hdr_t *) reqbuf; reqhdr->pdu_id = SDP_SVC_UPDATE_REQ; reqhdr->tid = htons(sdp_gen_tid(session)); p = reqbuf + sizeof(sdp_pdu_hdr_t); reqsize = sizeof(sdp_pdu_hdr_t); bt_put_unaligned(htonl(handle), (uint32_t *) p); reqsize += sizeof(uint32_t); p += sizeof(uint32_t); if (0 > sdp_gen_record_pdu(rec, &pdu)) { errno = ENOMEM; status = -1; goto end; } memcpy(p, pdu.data, pdu.data_size); reqsize += pdu.data_size; reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize); SDPDBG("Send req status : %d\n", status); if (status == 0) { rsphdr = (sdp_pdu_hdr_t *) rspbuf; p = rspbuf + sizeof(sdp_pdu_hdr_t); status = bt_get_unaligned((uint16_t *) p); } end: if (reqbuf) free(reqbuf); if (rspbuf) free(rspbuf); return status; } int sdp_record_update(sdp_session_t *session, const sdp_record_t *rec) { return sdp_device_record_update(session, BDADDR_ANY, rec); } sdp_record_t *sdp_record_alloc() { sdp_record_t *rec = malloc(sizeof(sdp_record_t)); memset((void *)rec, 0, sizeof(sdp_record_t)); rec->handle = 0xffffffff; return rec; } /* * Free the contents of a service record */ void sdp_record_free(sdp_record_t *rec) { sdp_list_free(rec->attrlist, (sdp_free_func_t)sdp_data_free); sdp_list_free(rec->pattern, free); free(rec); } void sdp_pattern_add_uuid(sdp_record_t *rec, uuid_t *uuid) { uuid_t *uuid128 = sdp_uuid_to_uuid128(uuid); SDPDBG("SvcRec : 0x%lx\n", (unsigned long)rec); SDPDBG("Elements in target pattern : %d\n", sdp_list_len(rec->pattern)); SDPDBG("Trying to add : 0x%lx\n", (unsigned long)uuid128); if (sdp_list_find(rec->pattern, uuid128, sdp_uuid128_cmp) == NULL) rec->pattern = sdp_list_insert_sorted(rec->pattern, uuid128, sdp_uuid128_cmp); else bt_free(uuid128); SDPDBG("Elements in target pattern : %d\n", sdp_list_len(rec->pattern)); } void sdp_pattern_add_uuidseq(sdp_record_t *rec, sdp_list_t *seq) { for (; seq; seq = seq->next) { uuid_t *uuid = (uuid_t *)seq->data; sdp_pattern_add_uuid(rec, uuid); } } /* * Extract a sequence of service record handles from a PDU buffer * and add the entries to a sdp_list_t. Note that the service record * handles are not in "data element sequence" form, but just like * an array of service handles */ static void extract_record_handle_seq(uint8_t *pdu, sdp_list_t **seq, int count, int *scanned) { sdp_list_t *pSeq = *seq; uint8_t *pdata = pdu; int n; for (n = 0; n < count; n++) { uint32_t *pSvcRec = malloc(sizeof(uint32_t)); *pSvcRec = ntohl(bt_get_unaligned((uint32_t *) pdata)); pSeq = sdp_list_append(pSeq, pSvcRec); pdata += sizeof(uint32_t); *scanned += sizeof(uint32_t); } *seq = pSeq; } /* * Generate the attribute sequence pdu form * from sdp_list_t elements. Return length of attr seq */ static int gen_dataseq_pdu(uint8_t *dst, const sdp_list_t *seq, uint8_t dtd) { sdp_data_t *dataseq; void **types, **values; sdp_buf_t buf; int i, seqlen = sdp_list_len(seq); // Fill up the value and the dtd arrays SDPDBG(""); memset(&buf, 0, sizeof(sdp_buf_t)); buf.data = malloc(SDP_UUID_SEQ_SIZE); buf.buf_size = SDP_UUID_SEQ_SIZE; SDPDBG("Seq length : %d\n", seqlen); types = malloc(seqlen * sizeof(void *)); values = malloc(seqlen * sizeof(void *)); for (i = 0; i < seqlen; i++) { void *data = seq->data; types[i] = &dtd; if (SDP_IS_UUID(dtd)) data = &((uuid_t *)data)->value; values[i] = data; seq = seq->next; } dataseq = sdp_seq_alloc(types, values, seqlen); SDPDBG("Data Seq : 0x%p\n", seq); seqlen = sdp_gen_pdu(&buf, dataseq); SDPDBG("Copying : %d\n", buf.data_size); memcpy(dst, buf.data, buf.data_size); sdp_data_free(dataseq); free(types); free(values); free(buf.data); return seqlen; } static int gen_searchseq_pdu(uint8_t *dst, const sdp_list_t *seq) { uuid_t *uuid = (uuid_t *) seq->data; return gen_dataseq_pdu(dst, seq, uuid->type); } static int gen_attridseq_pdu(uint8_t *dst, const sdp_list_t *seq, uint8_t dataType) { return gen_dataseq_pdu(dst, seq, dataType); } static int copy_cstate(uint8_t *pdata, const sdp_cstate_t *cstate) { if (cstate) { *pdata++ = cstate->length; memcpy(pdata, cstate->data, cstate->length); return cstate->length + 1; } *pdata = 0; return 1; } /* * This is a service search request. * * INPUT : * * sdp_list_t *search_list * Singly linked list containing elements of the search * pattern. Each entry in the list is a UUID (DataTypeSDP_UUID16) * of the service to be searched * * uint16_t max_rec_num * A 16 bit integer which tells the service, the maximum * entries that the client can handle in the response. The * server is obliged not to return > max_rec_num entries * * OUTPUT : * * int return value * 0: * The request completed successfully. This does not * mean the requested services were found * -1: * On any failure and sets errno * * sdp_list_t **rsp_list * This variable is set on a successful return if there are * non-zero service handles. It is a singly linked list of * service record handles (uint16_t) */ int sdp_service_search_req(sdp_session_t *session, const sdp_list_t *search, uint16_t max_rec_num, sdp_list_t **rsp) { int status = 0; uint32_t reqsize = 0, _reqsize; uint32_t rspsize = 0, rsplen; int seqlen = 0; int scanned, total_rec_count, rec_count; uint8_t *pdata, *_pdata; uint8_t *reqbuf, *rspbuf; sdp_pdu_hdr_t *reqhdr, *rsphdr; sdp_cstate_t *cstate = NULL; reqbuf = malloc(SDP_REQ_BUFFER_SIZE); rspbuf = malloc(SDP_RSP_BUFFER_SIZE); if (!reqbuf || !rspbuf) { errno = ENOMEM; status = -1; goto end; } reqhdr = (sdp_pdu_hdr_t *) reqbuf; reqhdr->pdu_id = SDP_SVC_SEARCH_REQ; pdata = reqbuf + sizeof(sdp_pdu_hdr_t); reqsize = sizeof(sdp_pdu_hdr_t); // add service class IDs for search seqlen = gen_searchseq_pdu(pdata, search); SDPDBG("Data seq added : %d\n", seqlen); // set the length and increment the pointer reqsize += seqlen; pdata += seqlen; // specify the maximum svc rec count that client expects bt_put_unaligned(htons(max_rec_num), (uint16_t *) pdata); reqsize += sizeof(uint16_t); pdata += sizeof(uint16_t); _reqsize = reqsize; _pdata = pdata; *rsp = NULL; do { // Add continuation state or NULL (first time) reqsize = _reqsize + copy_cstate(_pdata, cstate); // Set the request header's param length reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); reqhdr->tid = htons(sdp_gen_tid(session)); /* * Send the request, wait for response and if * no error, set the appropriate values and return */ status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize); if (status < 0) goto end; rsplen = 0; rsphdr = (sdp_pdu_hdr_t *) rspbuf; rsplen = ntohs(rsphdr->plen); if (rsphdr->pdu_id == SDP_ERROR_RSP) { SDPDBG("Status : 0x%x\n", rsphdr->pdu_id); status = -1; goto end; } scanned = 0; pdata = rspbuf + sizeof(sdp_pdu_hdr_t); // net service record match count total_rec_count = ntohs(bt_get_unaligned((uint16_t *) pdata)); pdata += sizeof(uint16_t); scanned += sizeof(uint16_t); rec_count = ntohs(bt_get_unaligned((uint16_t *) pdata)); pdata += sizeof(uint16_t); scanned += sizeof(uint16_t); SDPDBG("Total svc count: %d\n", total_rec_count); SDPDBG("Current svc count: %d\n", rec_count); SDPDBG("ResponseLength: %d\n", rsplen); if (!rec_count) { status = -1; goto end; } extract_record_handle_seq(pdata, rsp, rec_count, &scanned); SDPDBG("BytesScanned : %d\n", scanned); if (rsplen > scanned) { uint8_t cstate_len; pdata = rspbuf + sizeof(sdp_pdu_hdr_t) + scanned; cstate_len = *(uint8_t *) pdata; if (cstate_len > 0) { cstate = (sdp_cstate_t *)pdata; SDPDBG("Cont state length: %d\n", cstate_len); } else cstate = NULL; } } while (cstate); end: if (reqbuf) free(reqbuf); if (rspbuf) free(rspbuf); return status; } /* * This is a service attribute request. * * INPUT : * * uint32_t handle * The handle of the service for which the attribute(s) are * requested * * sdp_attrreq_type_t reqtype * Attribute identifiers are 16 bit unsigned integers specified * in one of 2 ways described below : * SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers * They are the actual attribute identifiers in ascending order * * SDP_ATTR_REQ_RANGE - 32bit identifier range * The high-order 16bits is the start of range * the low-order 16bits are the end of range * 0x0000 to 0xFFFF gets all attributes * * sdp_list_t *attrid * Singly linked list containing attribute identifiers desired. * Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL) * or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE) * * OUTPUT : * return sdp_record_t * * 0: * On any error and sets errno * !0: * The service record */ sdp_record_t *sdp_service_attr_req(sdp_session_t *session, uint32_t handle, sdp_attrreq_type_t reqtype, const sdp_list_t *attrids) { int status = 0; uint32_t reqsize = 0, _reqsize; uint32_t rspsize = 0, rsp_count; int attr_list_len = 0; int seqlen = 0; uint8_t *pdata, *_pdata; uint8_t *reqbuf, *rspbuf; sdp_pdu_hdr_t *reqhdr, *rsphdr; sdp_cstate_t *cstate = NULL; uint8_t cstate_len = 0; sdp_buf_t rsp_concat_buf; sdp_record_t *rec = 0; if (reqtype != SDP_ATTR_REQ_INDIVIDUAL && reqtype != SDP_ATTR_REQ_RANGE) { errno = EINVAL; return 0; } reqbuf = malloc(SDP_REQ_BUFFER_SIZE); rspbuf = malloc(SDP_RSP_BUFFER_SIZE); if (!reqbuf || !rspbuf) { errno = ENOMEM; status = -1; goto end; } memset((char *) &rsp_concat_buf, 0, sizeof(sdp_buf_t)); reqhdr = (sdp_pdu_hdr_t *) reqbuf; reqhdr->pdu_id = SDP_SVC_ATTR_REQ; pdata = reqbuf + sizeof(sdp_pdu_hdr_t); reqsize = sizeof(sdp_pdu_hdr_t); // add the service record handle bt_put_unaligned(htonl(handle), (uint32_t *) pdata); reqsize += sizeof(uint32_t); pdata += sizeof(uint32_t); // specify the response limit bt_put_unaligned(htons(65535), (uint16_t *) pdata); reqsize += sizeof(uint16_t); pdata += sizeof(uint16_t); // get attr seq PDU form seqlen = gen_attridseq_pdu(pdata, attrids, reqtype == SDP_ATTR_REQ_INDIVIDUAL? SDP_UINT16 : SDP_UINT32); if (seqlen == -1) { errno = EINVAL; status = -1; goto end; } pdata += seqlen; reqsize += seqlen; SDPDBG("Attr list length : %d\n", seqlen); // save before Continuation State _pdata = pdata; _reqsize = reqsize; do { // add NULL continuation state reqsize = _reqsize + copy_cstate(_pdata, cstate); // set the request header's param length reqhdr->tid = htons(sdp_gen_tid(session)); reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize); if (status < 0) goto end; rsp_count = 0; rsphdr = (sdp_pdu_hdr_t *) rspbuf; if (rsphdr->pdu_id == SDP_ERROR_RSP) { SDPDBG("PDU ID : 0x%x\n", rsphdr->pdu_id); status = -1; goto end; } pdata = rspbuf + sizeof(sdp_pdu_hdr_t); rsp_count = ntohs(bt_get_unaligned((uint16_t *) pdata)); attr_list_len += rsp_count; pdata += sizeof(uint16_t); // if continuation state set need to re-issue request before parsing cstate_len = *(uint8_t *) (pdata + rsp_count); SDPDBG("Response id : %d\n", rsphdr->pdu_id); SDPDBG("Attrlist byte count : %d\n", rsp_count); SDPDBG("sdp_cstate_t length : %d\n", cstate_len); /* * a split response: concatenate intermediate responses * and the last one (which has cstate_len == 0) */ if (cstate_len > 0 || rsp_concat_buf.data_size != 0) { uint8_t *targetPtr = NULL; cstate = cstate_len > 0 ? (sdp_cstate_t *) (pdata + rsp_count) : 0; // build concatenated response buffer rsp_concat_buf.data = realloc(rsp_concat_buf.data, rsp_concat_buf.data_size + rsp_count); rsp_concat_buf.buf_size = rsp_concat_buf.data_size + rsp_count; targetPtr = rsp_concat_buf.data + rsp_concat_buf.data_size; memcpy(targetPtr, pdata, rsp_count); rsp_concat_buf.data_size += rsp_count; } } while (cstate); if (attr_list_len > 0) { int scanned = 0; if (rsp_concat_buf.data_size != 0) pdata = rsp_concat_buf.data; rec = sdp_extract_pdu(pdata, &scanned); if (!rec) status = -1; } end: if (reqbuf) free(reqbuf); if (rsp_concat_buf.data) free(rsp_concat_buf.data); if (rspbuf) free(rspbuf); return rec; } /* * This is a service search request combined with the service * attribute request. First a service class match is done and * for matching service, requested attributes are extracted * * INPUT : * * sdp_list_t *search * Singly linked list containing elements of the search * pattern. Each entry in the list is a UUID(DataTypeSDP_UUID16) * of the service to be searched * * AttributeSpecification attrSpec * Attribute identifiers are 16 bit unsigned integers specified * in one of 2 ways described below : * SDP_ATTR_REQ_INDIVIDUAL - 16bit individual identifiers * They are the actual attribute identifiers in ascending order * * SDP_ATTR_REQ_RANGE - 32bit identifier range * The high-order 16bits is the start of range * the low-order 16bits are the end of range * 0x0000 to 0xFFFF gets all attributes * * sdp_list_t *attrids * Singly linked list containing attribute identifiers desired. * Every element is either a uint16_t(attrSpec = SDP_ATTR_REQ_INDIVIDUAL) * or a uint32_t(attrSpec=SDP_ATTR_REQ_RANGE) * * OUTPUT : * int return value * 0: * The request completed successfully. This does not * mean the requested services were found * -1: * On any error and sets errno * * sdp_list_t **rsp * This variable is set on a successful return to point to * service(s) found. Each element of this list is of type * sdp_record_t* (of the services which matched the search list) */ int sdp_service_search_attr_req(sdp_session_t *session, const sdp_list_t *search, sdp_attrreq_type_t reqtype, const sdp_list_t *attrids, sdp_list_t **rsp) { int status = 0; uint32_t reqsize = 0, _reqsize; uint32_t rspsize = 0; int seqlen = 0, attr_list_len = 0; int rsp_count = 0, cstate_len = 0; uint8_t *pdata, *_pdata; uint8_t *reqbuf, *rspbuf; sdp_pdu_hdr_t *reqhdr, *rsphdr; uint8_t dataType; sdp_list_t *rec_list = NULL; sdp_buf_t rsp_concat_buf; sdp_cstate_t *cstate = NULL; if (reqtype != SDP_ATTR_REQ_INDIVIDUAL && reqtype != SDP_ATTR_REQ_RANGE) { errno = EINVAL; return -1; } reqbuf = malloc(SDP_REQ_BUFFER_SIZE); rspbuf = malloc(SDP_RSP_BUFFER_SIZE); if (!reqbuf || !rspbuf) { errno = ENOMEM; status = -1; goto end; } memset((char *)&rsp_concat_buf, 0, sizeof(sdp_buf_t)); reqhdr = (sdp_pdu_hdr_t *) reqbuf; reqhdr->pdu_id = SDP_SVC_SEARCH_ATTR_REQ; // generate PDU pdata = reqbuf + sizeof(sdp_pdu_hdr_t); reqsize = sizeof(sdp_pdu_hdr_t); // add service class IDs for search seqlen = gen_searchseq_pdu(pdata, search); SDPDBG("Data seq added : %d\n", seqlen); // now set the length and increment the pointer reqsize += seqlen; pdata += seqlen; bt_put_unaligned(htons(SDP_MAX_ATTR_LEN), (uint16_t *) pdata); reqsize += sizeof(uint16_t); pdata += sizeof(uint16_t); SDPDBG("Max attr byte count : %d\n", SDP_MAX_ATTR_LEN); // get attr seq PDU form seqlen = gen_attridseq_pdu(pdata, attrids, reqtype == SDP_ATTR_REQ_INDIVIDUAL ? SDP_UINT16 : SDP_UINT32); if (seqlen == -1) { status = EINVAL; goto end; } pdata += seqlen; SDPDBG("Attr list length : %d\n", seqlen); reqsize += seqlen; *rsp = 0; // save before Continuation State _pdata = pdata; _reqsize = reqsize; do { reqhdr->tid = htons(sdp_gen_tid(session)); // add continuation state (can be null) reqsize = _reqsize + copy_cstate(_pdata, cstate); // set the request header's param length reqhdr->plen = htons(reqsize - sizeof(sdp_pdu_hdr_t)); rsphdr = (sdp_pdu_hdr_t *) rspbuf; status = sdp_send_req_w4_rsp(session, reqbuf, rspbuf, reqsize, &rspsize); if (status < 0) { SDPDBG("Status : 0x%x\n", rsphdr->pdu_id); goto end; } if (rsphdr->pdu_id == SDP_ERROR_RSP) { status = -1; goto end; } pdata = rspbuf + sizeof(sdp_pdu_hdr_t); rsp_count = ntohs(bt_get_unaligned((uint16_t *) pdata)); attr_list_len += rsp_count; pdata += sizeof(uint16_t); // pdata points to attribute list cstate_len = *(uint8_t *) (pdata + rsp_count); SDPDBG("Attrlist byte count : %d\n", attr_list_len); SDPDBG("Response byte count : %d\n", rsp_count); SDPDBG("Cstate length : %d\n", cstate_len); /* * This is a split response, need to concatenate intermediate * responses and the last one which will have cstate_len == 0 */ if (cstate_len > 0 || rsp_concat_buf.data_size != 0) { uint8_t *targetPtr = NULL; cstate = cstate_len > 0 ? (sdp_cstate_t *) (pdata + rsp_count) : 0; // build concatenated response buffer rsp_concat_buf.data = realloc(rsp_concat_buf.data, rsp_concat_buf.data_size + rsp_count); targetPtr = rsp_concat_buf.data + rsp_concat_buf.data_size; rsp_concat_buf.buf_size = rsp_concat_buf.data_size + rsp_count; memcpy(targetPtr, pdata, rsp_count); rsp_concat_buf.data_size += rsp_count; } } while (cstate); if (attr_list_len > 0) { int scanned = 0; if (rsp_concat_buf.data_size != 0) pdata = rsp_concat_buf.data; /* * Response is a sequence of sequence(s) for one or * more data element sequence(s) representing services * for which attributes are returned */ scanned = sdp_extract_seqtype(pdata, &dataType, &seqlen); SDPDBG("Bytes scanned : %d\n", scanned); SDPDBG("Seq length : %d\n", seqlen); if (scanned && seqlen) { pdata += scanned; do { int recsize = 0; sdp_record_t *rec = sdp_extract_pdu(pdata, &recsize); if (rec == NULL) { SDPERR("SVC REC is null\n"); status = -1; goto end; } if (!recsize) { sdp_record_free(rec); break; } scanned += recsize; pdata += recsize; SDPDBG("Loc seq length : %d\n", recsize); SDPDBG("Svc Rec Handle : 0x%x\n", rec->handle); SDPDBG("Bytes scanned : %d\n", scanned); SDPDBG("Attrlist byte count : %d\n", attr_list_len); rec_list = sdp_list_append(rec_list, rec); } while (scanned < attr_list_len); SDPDBG("Successful scan of service attr lists\n"); *rsp = rec_list; } } end: if (rsp_concat_buf.data) free(rsp_concat_buf.data); if (reqbuf) free(reqbuf); if (rspbuf) free(rspbuf); return status; } /* * Find devices in the piconet. */ int sdp_general_inquiry(inquiry_info *ii, int num_dev, int duration, uint8_t *found) { int n = hci_inquiry(-1, 10, num_dev, NULL, &ii, 0); if (n < 0) { SDPERR("Inquiry failed:%s", strerror(errno)); return -1; } *found = n; return 0; } int sdp_close(sdp_session_t *session) { int ret = close(session->sock); free(session); return ret; } static inline int sdp_is_local(const bdaddr_t *device) { return memcmp(device, BDADDR_LOCAL, sizeof(bdaddr_t)) == 0; } sdp_session_t *sdp_connect(const bdaddr_t *src, const bdaddr_t *dst, uint32_t flags) { int err; sdp_session_t *session = malloc(sizeof(sdp_session_t)); if (!session) return session; memset(session, 0, sizeof(*session)); session->flags = flags; if (sdp_is_local(dst)) { struct sockaddr_un sa; // create local unix connection session->sock = socket(PF_UNIX, SOCK_STREAM, 0); session->local = 1; if (session->sock >= 0) { sa.sun_family = AF_UNIX; strcpy(sa.sun_path, SDP_UNIX_PATH); if (connect(session->sock, (struct sockaddr *)&sa, sizeof(sa)) == 0) return session; } } else { struct sockaddr_l2 sa; // create L2CAP connection session->sock = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP); session->local = 0; if (session->sock >= 0) { sa.l2_family = AF_BLUETOOTH; sa.l2_psm = 0; if (bacmp(src, BDADDR_ANY) != 0) { sa.l2_bdaddr = *src; if (bind(session->sock, (struct sockaddr *) &sa, sizeof(sa)) < 0) goto fail; } if (flags & SDP_WAIT_ON_CLOSE) { struct linger l = { .l_onoff = 1, .l_linger = 1 }; setsockopt(session->sock, SOL_SOCKET, SO_LINGER, &l, sizeof(l)); } sa.l2_psm = htobs(SDP_PSM); sa.l2_bdaddr = *dst; do if (connect(session->sock, (struct sockaddr *) &sa, sizeof(sa)) == 0) return session; while (errno == EBUSY && (flags & SDP_RETRY_IF_BUSY)); } } fail: err = errno; if (session->sock >= 0) close(session->sock); free(session); errno = err; return 0; } int sdp_get_socket(const sdp_session_t *session) { return session->sock; } uint16_t sdp_gen_tid(sdp_session_t *session) { return session->tid++; }