diff options
Diffstat (limited to 'ffmpeg/libavformat/mmst.c')
| -rw-r--r-- | ffmpeg/libavformat/mmst.c | 629 |
1 files changed, 629 insertions, 0 deletions
diff --git a/ffmpeg/libavformat/mmst.c b/ffmpeg/libavformat/mmst.c new file mode 100644 index 0000000..c3d2ebb --- /dev/null +++ b/ffmpeg/libavformat/mmst.c @@ -0,0 +1,629 @@ +/* + * MMS protocol over TCP + * Copyright (c) 2006,2007 Ryan Martell + * Copyright (c) 2007 Björn Axelsson + * Copyright (c) 2010 Zhentan Feng <spyfeng at gmail dot com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* References + * MMS protocol specification: + * [1]http://msdn.microsoft.com/en-us/library/cc234711(PROT.10).aspx + * ASF specification. Revision 01.20.03. + * [2]http://msdn.microsoft.com/en-us/library/bb643323.aspx + */ + +#include "avformat.h" +#include "mms.h" +#include "internal.h" +#include "avio_internal.h" +#include "libavutil/intreadwrite.h" +#include "libavcodec/bytestream.h" +#include "network.h" +#include "url.h" + +#define LOCAL_ADDRESS 0xc0a80081 // FIXME get and use correct local ip address. +#define LOCAL_PORT 1037 // as above. +/** Client to server packet types. */ +typedef enum { + CS_PKT_INITIAL = 0x01, + CS_PKT_PROTOCOL_SELECT = 0x02, + CS_PKT_MEDIA_FILE_REQUEST = 0x05, + CS_PKT_START_FROM_PKT_ID = 0x07, + CS_PKT_STREAM_PAUSE = 0x09, + CS_PKT_STREAM_CLOSE = 0x0d, + CS_PKT_MEDIA_HEADER_REQUEST = 0x15, + CS_PKT_TIMING_DATA_REQUEST = 0x18, + CS_PKT_USER_PASSWORD = 0x1a, + CS_PKT_KEEPALIVE = 0x1b, + CS_PKT_STREAM_ID_REQUEST = 0x33, +} MMSCSPacketType; + +/** Server to client packet types. */ +typedef enum { + /** Control packets. */ + /*@{*/ + SC_PKT_CLIENT_ACCEPTED = 0x01, + SC_PKT_PROTOCOL_ACCEPTED = 0x02, + SC_PKT_PROTOCOL_FAILED = 0x03, + SC_PKT_MEDIA_PKT_FOLLOWS = 0x05, + SC_PKT_MEDIA_FILE_DETAILS = 0x06, + SC_PKT_HEADER_REQUEST_ACCEPTED = 0x11, + SC_PKT_TIMING_TEST_REPLY = 0x15, + SC_PKT_PASSWORD_REQUIRED = 0x1a, + SC_PKT_KEEPALIVE = 0x1b, + SC_PKT_STREAM_STOPPED = 0x1e, + SC_PKT_STREAM_CHANGING = 0x20, + SC_PKT_STREAM_ID_ACCEPTED = 0x21, + /*@}*/ + + /** Pseudo packets. */ + /*@{*/ + SC_PKT_CANCEL = -1, + SC_PKT_NO_DATA = -2, + /*@}*/ + + /** Data packets. */ + /*@{*/ + SC_PKT_ASF_HEADER = 0x010000,// make it bigger than 0xFF in case of + SC_PKT_ASF_MEDIA = 0x010001,// receiving false data packets. + /*@}*/ +} MMSSCPacketType; + +typedef struct { + MMSContext mms; + int outgoing_packet_seq; ///< Outgoing packet sequence number. + char path[256]; ///< Path of the resource being asked for. + char host[128]; ///< Host of the resources. + int incoming_packet_seq; ///< Incoming packet sequence number. + int incoming_flags; ///< Incoming packet flags. + int packet_id; ///< Identifier for packets in the current stream. + unsigned int header_packet_id; ///< default is 2. +} MMSTContext; + +/** Create MMST command packet header */ +static void start_command_packet(MMSTContext *mmst, MMSCSPacketType packet_type) +{ + MMSContext *mms = &mmst->mms; + mms->write_out_ptr = mms->out_buffer; + + bytestream_put_le32(&mms->write_out_ptr, 1); // start sequence + bytestream_put_le32(&mms->write_out_ptr, 0xb00bface); + bytestream_put_le32(&mms->write_out_ptr, 0); // Length starts from after the protocol type bytes + bytestream_put_le32(&mms->write_out_ptr, MKTAG('M','M','S',' ')); + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, mmst->outgoing_packet_seq++); + bytestream_put_le64(&mms->write_out_ptr, 0); // timestamp + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le16(&mms->write_out_ptr, packet_type); + bytestream_put_le16(&mms->write_out_ptr, 3); // direction to server +} + +/** Add prefixes to MMST command packet. */ +static void insert_command_prefixes(MMSContext *mms, + uint32_t prefix1, uint32_t prefix2) +{ + bytestream_put_le32(&mms->write_out_ptr, prefix1); // first prefix + bytestream_put_le32(&mms->write_out_ptr, prefix2); // second prefix +} + +/** Send a prepared MMST command packet. */ +static int send_command_packet(MMSTContext *mmst) +{ + MMSContext *mms = &mmst->mms; + int len= mms->write_out_ptr - mms->out_buffer; + int exact_length = FFALIGN(len, 8); + int first_length= exact_length - 16; + int len8= first_length/8; + int write_result; + + // update packet length fields. + AV_WL32(mms->out_buffer + 8, first_length); + AV_WL32(mms->out_buffer + 16, len8); + AV_WL32(mms->out_buffer + 32, len8-2); + memset(mms->write_out_ptr, 0, exact_length - len); + + // write it out. + write_result= ffurl_write(mms->mms_hd, mms->out_buffer, exact_length); + if(write_result != exact_length) { + av_log(NULL, AV_LOG_ERROR, + "Failed to write data of length %d: %d (%s)\n", + exact_length, write_result, + write_result < 0 ? strerror(AVUNERROR(write_result)) : + "The server closed the connection"); + return AVERROR(EIO); + } + + return 0; +} + +static void mms_put_utf16(MMSContext *mms, const uint8_t *src) +{ + AVIOContext bic; + int size = mms->write_out_ptr - mms->out_buffer; + int len; + ffio_init_context(&bic, mms->write_out_ptr, + sizeof(mms->out_buffer) - size, 1, NULL, NULL, NULL, NULL); + + len = avio_put_str16le(&bic, src); + mms->write_out_ptr += len; +} + +static int send_time_test_data(MMSTContext *mmst) +{ + start_command_packet(mmst, CS_PKT_TIMING_DATA_REQUEST); + insert_command_prefixes(&mmst->mms, 0x00f0f0f0, 0x0004000b); + return send_command_packet(mmst); +} + +static int send_protocol_select(MMSTContext *mmst) +{ + char data_string[256]; + MMSContext *mms = &mmst->mms; + + start_command_packet(mmst, CS_PKT_PROTOCOL_SELECT); + insert_command_prefixes(mms, 0, 0xffffffff); + bytestream_put_le32(&mms->write_out_ptr, 0); // maxFunnelBytes + bytestream_put_le32(&mms->write_out_ptr, 0x00989680); // maxbitRate + bytestream_put_le32(&mms->write_out_ptr, 2); // funnelMode + snprintf(data_string, sizeof(data_string), "\\\\%d.%d.%d.%d\\%s\\%d", + (LOCAL_ADDRESS>>24)&0xff, + (LOCAL_ADDRESS>>16)&0xff, + (LOCAL_ADDRESS>>8)&0xff, + LOCAL_ADDRESS&0xff, + "TCP", // or UDP + LOCAL_PORT); + + mms_put_utf16(mms, data_string); + return send_command_packet(mmst); +} + +static int send_media_file_request(MMSTContext *mmst) +{ + MMSContext *mms = &mmst->mms; + start_command_packet(mmst, CS_PKT_MEDIA_FILE_REQUEST); + insert_command_prefixes(mms, 1, 0xffffffff); + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, 0); + mms_put_utf16(mms, mmst->path + 1); // +1 for skip "/" + + return send_command_packet(mmst); +} + +static void handle_packet_stream_changing_type(MMSTContext *mmst) +{ + MMSContext *mms = &mmst->mms; + av_dlog(NULL, "Stream changing!\n"); + + // 40 is the packet header size, 7 is the prefix size. + mmst->header_packet_id= AV_RL32(mms->in_buffer + 40 + 7); + av_dlog(NULL, "Changed header prefix to 0x%x", mmst->header_packet_id); +} + +static int send_keepalive_packet(MMSTContext *mmst) +{ + // respond to a keepalive with a keepalive... + start_command_packet(mmst, CS_PKT_KEEPALIVE); + insert_command_prefixes(&mmst->mms, 1, 0x100FFFF); + return send_command_packet(mmst); +} + +/** Pad media packets smaller than max_packet_size and/or adjust read position + * after a seek. */ +static void pad_media_packet(MMSContext *mms) +{ + if(mms->remaining_in_len<mms->asf_packet_len) { + int padding_size = mms->asf_packet_len - mms->remaining_in_len; + memset(mms->in_buffer + mms->remaining_in_len, 0, padding_size); + mms->remaining_in_len += padding_size; + } +} + +/** Read incoming MMST media, header or command packet. */ +static MMSSCPacketType get_tcp_server_response(MMSTContext *mmst) +{ + int read_result; + MMSSCPacketType packet_type= -1; + MMSContext *mms = &mmst->mms; + for(;;) { + read_result = ffurl_read_complete(mms->mms_hd, mms->in_buffer, 8); + if (read_result != 8) { + if(read_result < 0) { + av_log(NULL, AV_LOG_ERROR, + "Error reading packet header: %d (%s)\n", + read_result, strerror(AVUNERROR(read_result))); + packet_type = SC_PKT_CANCEL; + } else { + av_log(NULL, AV_LOG_ERROR, + "The server closed the connection\n"); + packet_type = SC_PKT_NO_DATA; + } + return packet_type; + } + + // handle command packet. + if(AV_RL32(mms->in_buffer + 4)==0xb00bface) { + int length_remaining, hr; + + mmst->incoming_flags= mms->in_buffer[3]; + read_result= ffurl_read_complete(mms->mms_hd, mms->in_buffer+8, 4); + if(read_result != 4) { + av_log(NULL, AV_LOG_ERROR, + "Reading command packet length failed: %d (%s)\n", + read_result, + read_result < 0 ? strerror(AVUNERROR(read_result)) : + "The server closed the connection"); + return read_result < 0 ? read_result : AVERROR(EIO); + } + + length_remaining= AV_RL32(mms->in_buffer+8) + 4; + av_dlog(NULL, "Length remaining is %d\n", length_remaining); + // read the rest of the packet. + if (length_remaining < 0 + || length_remaining > sizeof(mms->in_buffer) - 12) { + av_log(NULL, AV_LOG_ERROR, + "Incoming packet length %d exceeds bufsize %zu\n", + length_remaining, sizeof(mms->in_buffer) - 12); + return AVERROR_INVALIDDATA; + } + read_result = ffurl_read_complete(mms->mms_hd, mms->in_buffer + 12, + length_remaining) ; + if (read_result != length_remaining) { + av_log(NULL, AV_LOG_ERROR, + "Reading pkt data (length=%d) failed: %d (%s)\n", + length_remaining, read_result, + read_result < 0 ? strerror(AVUNERROR(read_result)) : + "The server closed the connection"); + return read_result < 0 ? read_result : AVERROR(EIO); + } + packet_type= AV_RL16(mms->in_buffer+36); + if (read_result >= 44 && (hr = AV_RL32(mms->in_buffer + 40))) { + av_log(NULL, AV_LOG_ERROR, + "Server sent a message with packet type 0x%x and error status code 0x%08x\n", packet_type, hr); + return AVERROR(EINVAL); + } + } else { + int length_remaining; + int packet_id_type; + int tmp; + + // note we cache the first 8 bytes, + // then fill up the buffer with the others + tmp = AV_RL16(mms->in_buffer + 6); + length_remaining = (tmp - 8) & 0xffff; + mmst->incoming_packet_seq = AV_RL32(mms->in_buffer); + packet_id_type = mms->in_buffer[4]; + mmst->incoming_flags = mms->in_buffer[5]; + + if (length_remaining < 0 + || length_remaining > sizeof(mms->in_buffer) - 8) { + av_log(NULL, AV_LOG_ERROR, + "Data length %d is invalid or too large (max=%zu)\n", + length_remaining, sizeof(mms->in_buffer)); + return AVERROR_INVALIDDATA; + } + mms->remaining_in_len = length_remaining; + mms->read_in_ptr = mms->in_buffer; + read_result= ffurl_read_complete(mms->mms_hd, mms->in_buffer, length_remaining); + if(read_result != length_remaining) { + av_log(NULL, AV_LOG_ERROR, + "Failed to read packet data of size %d: %d (%s)\n", + length_remaining, read_result, + read_result < 0 ? strerror(AVUNERROR(read_result)) : + "The server closed the connection"); + return read_result < 0 ? read_result : AVERROR(EIO); + } + + // if we successfully read everything. + if(packet_id_type == mmst->header_packet_id) { + packet_type = SC_PKT_ASF_HEADER; + // Store the asf header + if(!mms->header_parsed) { + void *p = av_realloc(mms->asf_header, + mms->asf_header_size + mms->remaining_in_len); + if (!p) { + av_freep(&mms->asf_header); + return AVERROR(ENOMEM); + } + mms->asf_header = p; + memcpy(mms->asf_header + mms->asf_header_size, + mms->read_in_ptr, mms->remaining_in_len); + mms->asf_header_size += mms->remaining_in_len; + } + // 0x04 means asf header is sent in multiple packets. + if (mmst->incoming_flags == 0x04) + continue; + } else if(packet_id_type == mmst->packet_id) { + packet_type = SC_PKT_ASF_MEDIA; + } else { + av_dlog(NULL, "packet id type %d is old.", packet_id_type); + continue; + } + } + + // preprocess some packet type + if(packet_type == SC_PKT_KEEPALIVE) { + send_keepalive_packet(mmst); + continue; + } else if(packet_type == SC_PKT_STREAM_CHANGING) { + handle_packet_stream_changing_type(mmst); + } else if(packet_type == SC_PKT_ASF_MEDIA) { + pad_media_packet(mms); + } + return packet_type; + } +} + +static int mms_safe_send_recv(MMSTContext *mmst, + int (*send_fun)(MMSTContext *mmst), + const MMSSCPacketType expect_type) +{ + MMSSCPacketType type; + if(send_fun) { + int ret = send_fun(mmst); + if (ret < 0) { + av_dlog(NULL, "Send Packet error before expecting recv packet %d\n", expect_type); + return ret; + } + } + + if ((type = get_tcp_server_response(mmst)) != expect_type) { + av_log(NULL, AV_LOG_ERROR, + "Corrupt stream (unexpected packet type 0x%x, expected 0x%x)\n", + type, expect_type); + return AVERROR_INVALIDDATA; + } else { + return 0; + } +} + +static int send_media_header_request(MMSTContext *mmst) +{ + MMSContext *mms = &mmst->mms; + start_command_packet(mmst, CS_PKT_MEDIA_HEADER_REQUEST); + insert_command_prefixes(mms, 1, 0); + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, 0x00800000); + bytestream_put_le32(&mms->write_out_ptr, 0xffffffff); + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, 0); + + // the media preroll value in milliseconds? + bytestream_put_le32(&mms->write_out_ptr, 0); + bytestream_put_le32(&mms->write_out_ptr, 0x40AC2000); + bytestream_put_le32(&mms->write_out_ptr, 2); + bytestream_put_le32(&mms->write_out_ptr, 0); + + return send_command_packet(mmst); +} + +/** Send the initial handshake. */ +static int send_startup_packet(MMSTContext *mmst) +{ + char data_string[256]; + MMSContext *mms = &mmst->mms; + // SubscriberName is defined in MS specification linked below. + // The guid value can be any valid value. + // http://download.microsoft.com/ + // download/9/5/E/95EF66AF-9026-4BB0-A41D-A4F81802D92C/%5BMS-WMSP%5D.pdf + snprintf(data_string, sizeof(data_string), + "NSPlayer/7.0.0.1956; {%s}; Host: %s", + "7E667F5D-A661-495E-A512-F55686DDA178", mmst->host); + + start_command_packet(mmst, CS_PKT_INITIAL); + insert_command_prefixes(mms, 0, 0x0004000b); + bytestream_put_le32(&mms->write_out_ptr, 0x0003001c); + mms_put_utf16(mms, data_string); + return send_command_packet(mmst); +} + +/** Send MMST stream selection command based on the AVStream->discard values. */ +static int send_stream_selection_request(MMSTContext *mmst) +{ + int i; + MMSContext *mms = &mmst->mms; + // send the streams we want back... + start_command_packet(mmst, CS_PKT_STREAM_ID_REQUEST); + bytestream_put_le32(&mms->write_out_ptr, mms->stream_num); // stream nums + for(i= 0; i<mms->stream_num; i++) { + bytestream_put_le16(&mms->write_out_ptr, 0xffff); // flags + bytestream_put_le16(&mms->write_out_ptr, mms->streams[i].id); // stream id + bytestream_put_le16(&mms->write_out_ptr, 0); // selection + } + return send_command_packet(mmst); +} + +static int send_close_packet(MMSTContext *mmst) +{ + start_command_packet(mmst, CS_PKT_STREAM_CLOSE); + insert_command_prefixes(&mmst->mms, 1, 1); + + return send_command_packet(mmst); +} + +/** Close the MMSH/MMST connection */ +static int mms_close(URLContext *h) +{ + MMSTContext *mmst = (MMSTContext *)h->priv_data; + MMSContext *mms = &mmst->mms; + if(mms->mms_hd) { + send_close_packet(mmst); + ffurl_close(mms->mms_hd); + } + + /* free all separately allocated pointers in mms */ + av_free(mms->streams); + av_free(mms->asf_header); + + return 0; +} + +static int send_media_packet_request(MMSTContext *mmst) +{ + MMSContext *mms = &mmst->mms; + start_command_packet(mmst, CS_PKT_START_FROM_PKT_ID); + insert_command_prefixes(mms, 1, 0x0001FFFF); + bytestream_put_le64(&mms->write_out_ptr, 0); // seek timestamp + bytestream_put_le32(&mms->write_out_ptr, 0xffffffff); // unknown + bytestream_put_le32(&mms->write_out_ptr, 0xffffffff); // packet offset + bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit + bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit + bytestream_put_byte(&mms->write_out_ptr, 0xff); // max stream time limit + bytestream_put_byte(&mms->write_out_ptr, 0x00); // stream time limit flag + + mmst->packet_id++; // new packet_id + bytestream_put_le32(&mms->write_out_ptr, mmst->packet_id); + return send_command_packet(mmst); +} + + +static void clear_stream_buffers(MMSContext *mms) +{ + mms->remaining_in_len = 0; + mms->read_in_ptr = mms->in_buffer; +} + +static int mms_open(URLContext *h, const char *uri, int flags) +{ + MMSTContext *mmst = h->priv_data; + MMSContext *mms; + int port, err; + char tcpname[256]; + + h->is_streamed = 1; + mms = &mmst->mms; + + // only for MMS over TCP, so set proto = NULL + av_url_split(NULL, 0, NULL, 0, + mmst->host, sizeof(mmst->host), &port, mmst->path, + sizeof(mmst->path), uri); + + if(port<0) + port = 1755; // defaut mms protocol port + + // establish tcp connection. + ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mmst->host, port, NULL); + err = ffurl_open(&mms->mms_hd, tcpname, AVIO_FLAG_READ_WRITE, + &h->interrupt_callback, NULL); + if (err) + goto fail; + + mmst->packet_id = 3; // default, initial value. + mmst->header_packet_id = 2; // default, initial value. + err = mms_safe_send_recv(mmst, send_startup_packet, SC_PKT_CLIENT_ACCEPTED); + if (err) + goto fail; + err = mms_safe_send_recv(mmst, send_time_test_data, SC_PKT_TIMING_TEST_REPLY); + if (err) + goto fail; + err = mms_safe_send_recv(mmst, send_protocol_select, SC_PKT_PROTOCOL_ACCEPTED); + if (err) + goto fail; + err = mms_safe_send_recv(mmst, send_media_file_request, SC_PKT_MEDIA_FILE_DETAILS); + if (err) + goto fail; + err = mms_safe_send_recv(mmst, send_media_header_request, SC_PKT_HEADER_REQUEST_ACCEPTED); + if (err) + goto fail; + err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_HEADER); + if (err) + goto fail; + if((mmst->incoming_flags != 0X08) && (mmst->incoming_flags != 0X0C)) { + av_log(NULL, AV_LOG_ERROR, + "The server does not support MMST (try MMSH or RTSP)\n"); + err = AVERROR(EINVAL); + goto fail; + } + err = ff_mms_asf_header_parser(mms); + if (err) { + av_dlog(NULL, "asf header parsed failed!\n"); + goto fail; + } + mms->header_parsed = 1; + + if (!mms->asf_packet_len || !mms->stream_num) + goto fail; + + clear_stream_buffers(mms); + err = mms_safe_send_recv(mmst, send_stream_selection_request, SC_PKT_STREAM_ID_ACCEPTED); + if (err) + goto fail; + // send media packet request + err = mms_safe_send_recv(mmst, send_media_packet_request, SC_PKT_MEDIA_PKT_FOLLOWS); + if (err) { + goto fail; + } + av_dlog(NULL, "Leaving open (success)\n"); + return 0; +fail: + mms_close(h); + av_dlog(NULL, "Leaving open (failure: %d)\n", err); + return err; +} + +/** Read ASF data through the protocol. */ +static int mms_read(URLContext *h, uint8_t *buf, int size) +{ + /* TODO: see tcp.c:tcp_read() about a possible timeout scheme */ + MMSTContext *mmst = h->priv_data; + MMSContext *mms = &mmst->mms; + int result = 0; + + do { + if(mms->asf_header_read_size < mms->asf_header_size) { + /* Read from ASF header buffer */ + result = ff_mms_read_header(mms, buf, size); + } else if(mms->remaining_in_len) { + /* Read remaining packet data to buffer. + * the result can not be zero because remaining_in_len is positive.*/ + result = ff_mms_read_data(mms, buf, size); + } else { + /* Read from network */ + int err = mms_safe_send_recv(mmst, NULL, SC_PKT_ASF_MEDIA); + if (err == 0) { + if(mms->remaining_in_len>mms->asf_packet_len) { + av_log(NULL, AV_LOG_ERROR, + "Incoming pktlen %d is larger than ASF pktsize %d\n", + mms->remaining_in_len, mms->asf_packet_len); + result= AVERROR(EIO); + } else { + // copy the data to the packet buffer. + result = ff_mms_read_data(mms, buf, size); + if (result == 0) { + av_dlog(NULL, "Read ASF media packet size is zero!\n"); + break; + } + } + } else { + av_dlog(NULL, "read packet error!\n"); + break; + } + } + } while(!result); // only return one packet. + return result; +} + +URLProtocol ff_mmst_protocol = { + .name = "mmst", + .url_open = mms_open, + .url_read = mms_read, + .url_close = mms_close, + .priv_data_size = sizeof(MMSTContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, +}; |