WO2018000355A1 - 一种在系统内转发数据流的方法及系统 - Google Patents
一种在系统内转发数据流的方法及系统 Download PDFInfo
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- WO2018000355A1 WO2018000355A1 PCT/CN2016/087964 CN2016087964W WO2018000355A1 WO 2018000355 A1 WO2018000355 A1 WO 2018000355A1 CN 2016087964 W CN2016087964 W CN 2016087964W WO 2018000355 A1 WO2018000355 A1 WO 2018000355A1
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- H—ELECTRICITY
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- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- the present invention relates to the field of data transmission, and more particularly to a method and system for forwarding data streams within a system.
- streaming media transmission based on the LINUX system adopts a UDP-based real-time transmission protocol, which divides a multimedia file into a plurality of data packets or frames for transmission without data verification on the network.
- this transmission has a certain bottleneck. Specifically, when such a transmission is in progress, each packet or frame will cause an interrupt and process the interrupt in the central processor before deciding how to transmit or process the packet or frame.
- This processing method not only occupies a large amount of resources, but also delays its time, and when multiple streaming media are concurrent, it may cause blocking of the system.
- the technical problem to be solved by the present invention is to provide a method and system for forwarding a data stream in a system with less resources and faster transmission speed in view of the above-mentioned defects of occupying more resources and slower transmission speed.
- the technical solution adopted by the present invention to solve the technical problem thereof is to construct a method for forwarding a data stream in a system, the system comprising a first port connected to the originating end, a second port connected to the receiving end, and a central part processing the data stream
- the processor includes the following steps:
- A) the sender sends signaling control protocol information to the central processor
- the central processor parses the received signaling control protocol to find the a first port corresponding to the start end and a second port corresponding to the first port;
- the originating end sends a data stream to the receiving end through the first port and the second port by using a real-time transport protocol format.
- step B) further comprises:
- step C) comprises the following steps:
- the central processor sets a forwarding path whose input is the first port and whose output is the second port.
- step C1) further comprises:
- step C1) further comprises:
- the present invention also relates to a data stream forwarding system, the system comprising a first port connected to the originating end, a second port connecting the receiving end, and a kernel for processing the data stream, the kernel comprising a signal for receiving the transmitting end a signaling control protocol receiving module for controlling protocol information, a signaling control protocol parsing module for parsing the signaling control protocol information, a port searching module for finding a corresponding first port and a second port, and for setting The port setting module of the port.
- the signaling parsing module further includes a network address obtaining unit for obtaining the originating network address and the receiving end network address, and assigning the obtained network address to the found A network address allocation unit for one port and a second port.
- the port setting module further includes a routing setting unit for setting a routing path between the initiator and the receiving end.
- the routing setting unit is a virtual connection configuration unit that is connected between the first port and the second port, which is obtained through the NETFILTER architecture.
- the routing setting unit is a data forwarding configuration unit obtained by the NETFILTER architecture for forwarding a data stream between the first port and the second port.
- a method and system for forwarding a data stream in a system according to the present invention has the following beneficial effects: since each port in the LINUX system is configured through a signaling control protocol, the system does not need to receive each of the streaming media. Packets or frames are interrupted and processed by the central processing unit, but each initiator can process it once per stream transmission, which not only reduces the burden on the central processing unit, but also improves the streaming media in the system. The speed of forwarding.
- FIG. 1 is a flowchart of a method for forwarding a data stream in a system and a data forwarding method in an embodiment of the system according to the present invention
- Figure 2 is a schematic structural view of the system in the embodiment
- FIG. 3 is a schematic structural diagram of a port setting module in the embodiment.
- the data forwarding method includes the following steps:
- Step S101 The central processing unit receives the signaling control protocol:
- the sending end of the streaming media ie, the server or the terminal that sends the streaming media
- signaling control protocol information that is, SIP information, where the information includes the flow.
- the source address, destination address, and other related parameters or information about the streaming media the information is sent to a central processing unit (ie, the kernel of the LINUX system), and the central processing unit receives the signaling control protocol information.
- Step S102 parses the signaling control protocol to obtain a source address, a destination address, and a processing type.
- the central processing unit parses the SIP information to obtain a source address, a destination address, and the like. Specifically, the SIP information is unpacked, the source address and the destination address are obtained, and it is determined whether the destination address is a local address. If yes, the streaming media sent by the source address does not need to be forwarded, but directly Calling the local streaming media processing unit to receive; generally speaking, the destination address is not the local address, but the next level or the next level related address, and the central processor searches for the destination address.
- the routing table (address table?) finds the location of the destination address.
- the result of the lookup table needs to be forwarded; after the central processor obtains the source address and the destination address, it is also necessary to configure a pair of ports respectively.
- the source address is connected to the destination address so that when the source begins to stream media data, it can provide a path.
- Step S103 configuring the first port and the second port: in this step, the central processor further needs to set the first port corresponding to the network address of the initiator, and determine the port number; and obtain the port number of the first port.
- the lookup table pre-programmed port correspondence table, stored in the LINUX system
- Step S104 setting a forwarding path: In this step, after the first port and the second port are determined, the path between the first port and the second port is set.
- the detection points ie, HOOK
- the streaming media entering the port directly flows to the destination address according to the set path, and generally, the path thereof
- the order is that the source address, the first port, the second port, and the destination address flow in sequence; and the virtual port is established between the first port and the second port.
- the undo channel when the streaming media output is output, causes the streaming media to directly output through the channel; in this embodiment, because the LINUX system is used, the hooks of the first port and the second port are set by using the NETFILTER architecture, thereby The first port and the second port are configured to implement the virtual connection; specifically, at the first port, the NF_IP6_FORWARD HOOK configured for the port is configured to write the second port number to the corresponding position in the command during configuration. So that the streaming media entering the first port is directly sent to the second port, and the second port is configured with the NF_POST_ROUTING HOOK in addition to the NF_IP6_FORWARD HOOK, and the destination address is written to the command during configuration.
- the data check point of the first port may also be set through the NETFILTER architecture, so that the data stream that enters the first port from outside the system is directly forwarded. Go to the second port; set the data check point of the second port through the NETFILTER architecture, so that the system is The data entering the second port is directly forwarded to the first port, and the data stream entering the second port by the first port is forwarded to the receiving end; compared with the configuration in this embodiment, The difference is that the first port and the second port must be configured with NF_IP6_FORWARD HOOK and NF_POST_ROUTING HOOK. That is, in this embodiment, the set streaming media forwarding channel is unidirectional, while in other embodiments, the above channel may also be bidirectional.
- Step S105 The source starts to send the streaming media, and forwards the streaming media.
- the server or the terminal where the source address is located starts to send the streaming media data, and the streaming media data starts to be transmitted along the path set in the foregoing step, that is, The forwarding is transmitted directly through the above port through a central processing unit (core).
- core central processing unit
- FIG. 2 shows a schematic structural diagram of the system.
- the system includes an initiator (not shown) that connects the streaming media.
- a central processing unit 21 ie, a LINUX system kernel
- the central processing unit 21 The signaling control protocol receiving module 211, the signaling control protocol parsing module 212, the port searching module 213, and the port setting module 214; wherein the functions of the foregoing modules are as follows: the signaling control protocol receiving module 211 is configured to receive the sending end Signaling control protocol information is received, which receives the server at the source address end or the end The signaling control protocol (SIP) information sent by the terminal to the central processing unit 21 is used; the signaling control protocol parsing module 212 is configured to parse the signaling control protocol information, and parse the received signaling control protocol information to obtain the The network address (source address) of the terminal and the network address (destination address) of the receiving end; in the embodiment, the signaling parsing module 212 further includes a network address obtaining unit and a network address assigning unit (not shown), wherein The network address obtaining unit is configured to obtain the originating network address and the receiving end network address; the network address assigning unit is configured to allocate the obtained network address to the
- the port setting module 214 is configured to set the end .
- the port setting module 214 further includes a routing setting unit 215 (see FIG. 3) for setting a routing path between the streaming media originating end and the receiving end.
- the routing setting unit 215 is a virtual connection configuration unit obtained by the NETFILTER architecture and connecting the first port and the second port; the virtual connection configuration unit configures the NF_IP6_FORWARD HOOK of the first port ( a detection point), in the configuration, the port number of the second port is written into a corresponding position in the configuration command, so that the streaming media entering the first port is directly sent to the second port; and the NF_IP6_FORWARD HOOK of the second port is also configured.
- NF_POST_ROUTING HOOK the destination address is written to the corresponding location in its configuration command during configuration, so that the streaming media is forwarded to the destination address.
- the routing setting unit may also be a data forwarding configuration unit obtained by the NETFILTER architecture for forwarding a data stream between the first port and the second port; in other embodiments, The data forwarding configuration unit configures the NF_IP6_FORWARD HOOK and the NF_POST_ROUTING HOOK of the first port and the second port, respectively. That is, in this embodiment, the set streaming media forwarding channel is unidirectional, while in other embodiments, the above channel may also be bidirectional.
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Abstract
本发明涉及一种在系统内转发数据流的方法，包括如下步骤：发送端发送信令控制协议信息到所述中央处理器；中央处理器解析所接收到的信令控制协议，查找到所述发起端对应的第一端口以及该第一端口对应的第二端口；设置所述第一端口和第二端口；发起端使用实时传输协议格式发出数据流通过所述第一端口、第二端口转发到所述接收端。本发明还涉及一种数据流转发系统。实施本发明所述的一种在系统内转发数据流的方法及系统，具有以下有益效果：减轻了中央处理器的负担，提高了流媒体在系统中转发的速度。
Description
本发明涉及数据传输领域，更为具体地说，涉及一种在系统内转发数据流的方法及系统。
当前，网络技术的发展越来越成熟，而网络也在人们的生活中占有越来越重要的位置。除了传统的网络数据的传输，一些流媒体的运用也正变得普及。例如，基于LINUX系统的流媒体传输等。通常，基于LINUX系统的流媒体传输采用基于UDP的实时传输协议，其将多媒体文件分为多个数据包或帧在网络上进行无数据校验的传输。通常而言，这种传输存在一定的瓶颈。具体而言，这种传输进行时，每个数据包或帧都会引发中断，并在中央处理器中处理该中断，再决定如何传输或处理该数据包或帧。这种处理方法不仅占用了大量的资源，使得其时间上有所延迟，而且，当多个流媒体并发时，可能导致系统的阻塞。
发明内容
本发明要解决的技术问题在于，针对现有技术的上述占用资源多、传输速度慢的缺陷，提供一种占用资源少、传输速度较快的一种在系统内转发数据流的方法及系统。
本发明解决其技术问题所采用的技术方案是：构造一种在系统内转发数据流的方法，所述系统包括连接发起端的第一端口、连接接收端的第二端口以及处理所述数据流的中央处理器，包括如下步骤：
A)发送端发送信令控制协议信息到所述中央处理器；
B)中央处理器解析所接收到的信令控制协议，查找到所述发
起端对应的第一端口以及该第一端口对应的第二端口；
C)设置所述第一端口和第二端口；
D)发起端使用实时传输协议格式发出数据流通过所述第一端口、第二端口转发到所述接收端。
在本发明所述的方法中，所述步骤B)进一步包括：
B1)解析所接收到的信令控制协议信息，得到发起端的网络地址和接收端的网络地址；
B2)设置所述发起端网络地址所对应的第一端口号，并将所述接收端的网络地址设置于与所述第一端口号对应的第二端口。
在本发明所述的方法中，所述步骤C)包括如下步骤：
C1)中央处理器设置其输入为所述第一端口而其输出为所述第二端口的转发路径。
在本发明所述的方法中，所述步骤C1)进一步包括：
C111)通过NETFILTER架构分别设置所述第一端口和所述第二端口的数据检查点，使所述第一端口与所述第二端口虚拟连接。
在本发明所述的方法中，所述步骤C1)进一步包括：
C121)通过NETFILTER架构设置所述第一端口的数据检查点，使由系统外部进入所述第一端口的数据流直接转发到所述第二端口；
C122)通过NETFILTER架构设置所述第二端口的数据检查点，使由系统外部进入所述第二端口的数据直接转发到所述第一端口，由所述第一端口进入所述第二端口的数据流转发到所述接收端。
本发明还涉及一种数据流转发系统，所述系统包括连接发起端的第一端口、连接接收端的第二端口以及处理所述数据流的内核，所述内核包括用于接收所述发送端传来信令控制协议信息的信令控制协议接收模块、用于解析所述信令控制协议信息的信令控制协议解析模块、用于查找对应的第一端口和第二端口的端口查找模块以及用于设置所述端口的端口设置模块。
在本发明所述的系统中，所述信令解析模块还包括用于取得所述发起端网络地址和接收端网络地址的网络地址取得单元以及将所述取得网络地址分配到所述找到的第一端口和第二端口的网络地址分配单元。
在本发明所述的系统中，所述端口设置模块还包括用于设置所述发起端和接收端之间路由路径的路由设置单元。
在本发明所述的系统中，所述路由设置单元为包括通过NETFILTER架构得到的、连接所述第一端口和第二端口之间的虚拟连接配置单元。
在本发明所述的系统中，所述路由设置单元为通过NETFILTER架构得到的、用于在所述第一端口和第二端口之间转发数据流的数据转发配置单元。
实施本发明所述的一种在系统内转发数据流的方法及系统，具有以下有益效果：由于通过信令控制协议配置LINUX系统中的各个端口，使得系统不需要在接收到流媒体的每个数据包或帧时都产生中断并经过中央处理器来处理，而是每个发起端在每次流媒体传输时处理一次即可，不仅减轻了中央处理器的负担，而且提高了流媒体在系统中转发的速度。
图1是本发明一种在系统内转发数据流的方法及系统实施例中数据转发方法的流程图；
图2是所述实施例中系统结构示意图；
图3是所述实施例中端口设置模块结构示意图。
下面将结合附图对本发明实施例作进一步说明。
如图1所示，在本发明一种在系统内转发数据流的方法及系统实
施例中，所述数据转发方法包括如下步骤：
步骤S101中央处理器接收信令控制协议：在本步骤中，流媒体的发送端(即发出流媒体的服务器或终端)发出信令控制协议信息，即SIP信息，在该信息中，包含了流媒体的源地址、目的地址等有关流媒体的相关参数或信息；该信息发送到中央处理器(即LINUX系统的内核)，中央处理器接收该信令控制协议信息。
步骤S102解析信令控制协议，得到源地址、目的地址及处理类型：在本步骤中，上述中央处理器解析上述SIP信息，得到其中的源地址、目的地址等。具体而言，就是对上述SIP信息解包，得到其源地址和目的地址，并且判断该目的地址是否就是本机地址，如果是的话，就不需要转发上述源地址送出的流媒体，而是直接调用本地的流媒体处理单元接收即可；通常而言，上述目的地址都不会是本地的地址，而是下一级或下一级相关的地址，上述中央处理器在得到目的地址后，查找路由表(地址表？)找到目的地址的位置，一般来讲，查表的结果是需要转发的；在上述中央处理器得到上述的源地址与目的地址之后，还需要配置一对端口分别与上述源地址和目的地址连接，这样，当源开始传送流媒体数据时，才能为其提供一个通路。
步骤S103配置第一端口及第二端口：在本步骤中，中央处理器还需要设定发起端网络地址所对应的第一端口，确定其端口号；在得到上述第一端口的端口号的情况下，查表(事先编好的端口对应表，存储于LINUX系统中)得到上述第一端口对应的第二端口号，并将上述目的地址(即接收端的网络地址)设置于与上述第一端口对应的第二端口。
步骤S104设置转发路径：在本步骤中，在上述第一端口和第二端口确定之后，设置上述第一端口和第二端口之间的路径。在本实施例中，是通过设置上述第一端口以及第二端口的检测点(即HOOK)，使得进入上述端口的流媒体按照设定的路径，直接流向目的地址，一般而言，其路径的次序为源地址、第一端口、第二端口、目的地址依次流过；相当于在上述第一端口和第二端口之间建立一个虚拟的、可
撤销的通道，在上述流媒体输出时，使得该流媒体直接通过该通道输出；在本实施例中，由于基于LINUX系统，使用NETFILTER架构对上述第一端口和第二端口的hook进行设置，从而使得上述第一端口和第二端口实现上述的虚拟连接；具体而言，在第一端口，配置该端口的NF_IP6_FORWARD HOOK(检测点)在配置时将上述第二端口号写入命令中的相应位置，使得进入第一端口的流媒体被直接发送到上述第二端口，而在第二端口除配置上述NF_IP6_FORWARD HOOK外，还配置其NF_POST_ROUTING HOOK(检测点)，在配置时将目的地址写入其命令中的相应位置，使得流媒体转发到目的地址；在其他实施例中，也可以通过NETFILTER架构设置所述第一端口的数据检查点，使由系统外部进入所述第一端口的数据流直接转发到所述第二端口；通过NETFILTER架构设置所述第二端口的数据检查点，使由系统外部进入所述第二端口的数据直接转发到所述第一端口，由所述第一端口进入所述第二端口的数据流转发到所述接收端；其与本实施例中的配置比较，其区别为第一端口和第二端口都要配置NF_IP6_FORWARD HOOK和NF_POST_ROUTING HOOK。即在本实施例中，设置的流媒体转发通道是单向的，而在其他实施例中，上述通道也可以是双向的。
步骤S105源开始发流媒体，转发所述流媒体：在本步骤中，上述源地址所在的服务器或终端开始发送流媒体数据，该流媒体数据开始沿上述步骤中设定的路径传输，即不通过中央处理器(内核)而直接通过上述端口传输转发。
在本实施例中，还涉及一种数据流转发系统，图2示出了该系统的结构示意图，如图2所示，该系统包括连接发出流媒体的发起端(图中未示出)的第一端口22、连接流媒体接收端(图中未示出)的第二端口23以及处理所述数据流的中央处理器21(即LINUX系统内核)，在本实施例中，中央处理器21包括信令控制协议接收模块211，信令控制协议解析模块212，端口查找模块213以及端口设置模块214；其中，上述各个模块的作用如下：信令控制协议接收模块211用于接收所述发送端传来信令控制协议信息，其接收源地址端的服务器或终
端发送到上述中央处理器21的信令控制协议(SIP)信息；信令控制协议解析模块212用于解析所述信令控制协议信息，其解析所接收到的信令控制协议信息，得到发起端的网络地址(源地址)和接收端的网络地址(目的地址)；在本实施例中，上述信令解析模块212还包括网络地址取得单元以及网络地址分配单元(图中未示出)，其中，网络地址取得单元用于取得所述发起端网络地址和接收端网络地址；网络地址分配单元用于将所述取得网络地址分配到所述找到的第一端口和第二端口；端口查找模块213用于查找对应的第一端口和第二端口，其将上述取得的源地址分配到一个指定的第一端口，依据上述得到的第一端口号，取得与该第一端口对应的第二端口号，并将接收端的网络地址(目的地址)设置于与所述第一端口号对应的第二端口；端口设置模块214用于设置所述端口。上述端口设置模块214还包括用于设置上述流媒体发起端和接收端之间路由路径的路由设置单元215(参见图3)。在本实施例中，所述路由设置单元215为通过NETFILTER架构得到的、连接所述第一端口和第二端口之间的虚拟连接配置单元；该虚拟连接配置单元配置第一端口的NF_IP6_FORWARD HOOK(检测点)，在配置时将上述第二端口的端口号写入配置命令中的相应位置，使得进入第一端口的流媒体被直接发送到上述第二端口；还配置第二端口的NF_IP6_FORWARD HOOK和NF_POST_ROUTING HOOK(检测点)，在配置时将目的地址写入其配置命令中的相应位置，使得流媒体转发到目的地址。而在其他实施例中，上述路由设置单元也可以为通过NETFILTER架构得到的、用于在所述第一端口和第二端口之间转发数据流的数据转发配置单元；在上述其他实施例中，数据转发配置单元分别对第一端口和第二端口的NF_IP6_FORWARD HOOK和NF_POST_ROUTING HOOK进行配置。即在本实施例中，设置的流媒体转发通道是单向的，而在其他实施例中，上述通道也可以是双向的。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指
出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
Claims (10)
- 一种在系统内转发数据流的方法，所述系统包括连接发起端的第一端口、连接接收端的第二端口以及处理所述数据流的中央处理器，其特征在于，包括如下步骤：A)发送端发送信令控制协议信息到所述中央处理器；B)中央处理器解析所接收到的信令控制协议，查找到所述发起端对应的第一端口以及该第一端口对应的第二端口；C)设置所述第一端口和第二端口；D)发起端使用实时传输协议格式发出数据流通过所述第一端口、第二端口转发到所述接收端。
- 根据权利要求1所述的转发数据流的方法，其特征在于，所述步骤B)进一步包括：B1)解析所接收到的信令控制协议信息，得到发起端的网络地址和接收端的网络地址；B2)设置所述发起端网络地址所对应的第一端口，并将所述接收端的网络地址设置于与所述第一端口号对应的第二端口。
- 根据权利要求2所述的转发数据流的方法，其特征在于，所述步骤C)包括如下步骤：C1)中央处理器设置其输入为所述第一端口而其输出为所述第二端口的转发路径。
- 根据权利要求3所述的转发数据流的方法，其特征在于，所述步骤C1)进一步包括：C111)通过NETFILTER架构分别设置所述第一端口和所述第二端口的数据检查点，使所述第一端口与所述第二端口虚拟连接。
- 根据权利要求3所述的转发数据流的方法，其特征在于，所述步骤C1)进一步包括：C121)通过NETFILTER架构设置所述第一端口的数据检查点， 使由系统外部进入所述第一端口的数据流直接转发到所述第二端口；C122)通过NETFILTER架构设置所述第二端口的数据检查点，使由系统外部进入所述第二端口的数据直接转发到所述第一端口，由所述第一端口进入所述第二端口的数据流转发到所述接收端。
- 一种数据流转发系统，所述系统包括连接发起端的第一端口、连接接收端的第二端口以及处理所述数据流的内核，其特征在于，所述内核包括用于接收所述发送端传来信令控制协议信息的信令控制协议接收模块、用于解析所述信令控制协议信息的信令控制协议解析模块、用于查找对应的第一端口和第二端口的端口查找模块以及用于设置所述端口的端口设置模块。
- 根据权利要求6所述的数据流转发系统，其特征在于，所述信令解析模块还包括用于取得所述发起端网络地址和接收端网络地址的网络地址取得单元以及将所述取得网络地址分配到所述找到的第一端口和第二端口的网络地址分配单元。
- 根据权利要求7所述的数据流转发系统，其特征在于，所述端口设置模块还包括用于设置所述发起端和接收端之间路由路径的路由设置单元。
- 根据权利要求8所述的数据流转发系统，其特征在于，所述路由设置单元为包括通过NETFILTER架构得到的、连接所述第一端口和第二端口之间的虚拟连接配置单元。
- 根据权利要求8所述的数据流转发系统，其特征在于，所述路由设置单元为通过NETFILTER架构得到的、用于在所述第一端口和第二端口之间转发数据流的数据转发配置单元。
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