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;char msg[256];int addr_len;if((mysock=socket(AF_INET,SOCK_DGRAM,0)){perror("error");exit(1);}else{printf("socket created.\n");printf("socket ID: %d\n",mysock);}addr_len=sizeof(struct sockaddr_in);bzero(addr,sizeof(addr));addr.sin_family=AF_INET;addr.sin_port=htons(lport);addr.sin_addr.s_addr=htonl(INADDR_ANY);if(bind(mysock,addr,sizeof(addr)){perror("connect");exit(1);}else{printf("bind ok.\n");printf("local port: %d\n",lport);}while(1){bzero(msg,sizeof(msg));len=recvfrom (mysock,msg,sizeof(msg
My user process needs to communicate with my service process, and I need to be aware of the way it communicates through file mappings and events:1. Need low privilegeVarSecmem:security_attributes;Asd:security_descriptor;BeginFexistsalready: = False;InitializeSecurityDescriptor (@aSD, security_descriptor_revision);SetSecurityDescriptorDacl (@aSD, True, Nil, False);Secmem.nlength: = SizeOf (security_attributes);Secmem.lpsecuritydescriptor: = @aSD;Secmem.binherithandle: = False;Fmaphandle: = Create
BUFFER_SIZE 1024 #define FILE_NAME_MAX_SIZE 512 int main() { /* 服务端地址 */struct sockaddr_in server_addr; bzero(server_addr, sizeof(server_addr)); server_addr.sin_family = AF_INET; server_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); server_addr.sin_port = htons(SERVER_PORT); /* 创建socket */int client_socket_fd = socket(AF_INET, SOCK_DGRAM, 0); if(client_socket_fd { perror("Create Socket Failed:"); exit(1); } /* 输入文件名到缓冲区 */char file_name[FILE_NAME_MAX_SIZE+1]; bzero(file_name, FILE_NAME_MAX_SIZE
**/ //obtains the readout position from the structure char *index = p_payload + (P_shm->rd_index * p_shm->blksize); Read memcpy (buf, index, p_shm->blksize); P_shm->rd_index = (p_shm->rd_index+1)%p_shm->blocks; /** exit Critical Zone **/ Sem_v (Sem_mutex); Sem_v (Sem_full); } . Phony:clean all CC = g++ cppflags =-wall-g bin = Write Read free SOURCES = $ (bin.=.cpp) All : $ (BIN) %.O:%.cpp $ (cc) $ (cppflags)-C $^-o [ema
In the communication field, no one knows Cisco or Huawei. As giants in the communication industry, how do they take actions in this field? In any case, the Unified Communication System Service is what we really need. Now let's take a look at the services of the Unified Communicatio
I. SYSTEM INTRODUCTION The system uses a 3D full-view imitation of the REAL Enterprise office environment, and uses a Communication Center platform to connect enterprises that want to communicate with each other, the system is completely free from traditional development ideas and application methods to face users in
signal similar to that received by the CPU, but the signal is queried at the end of the exception processing or before the clock interrupt processing is finished. The signal also has the shielding facility, can set the signal shielding position, causes the process to ignore the signal which sends. The process that receives the signal responds by performing a default action (such as the default processing of the SIGINT signal is process revocation), executing a preset signal handler, or ignoring
For example, if you exchange data between tickdata processing and subsequent transaction signal analysis, the latency of a multi-threaded system is small, but it is not conducive to code function differentiation; the code for port communication between multiple programs is clearer, but the delay is obviously increased. How to choose? For example, if you exchange data between tick data Processing and subsequ
A Fast Ethernet Communication System Platform Based on 12301.6 [Date: 2008-7-22] Source: Today's electronics/21ic Author: Hunan Institute of Technology Yi Jie [Font: large, medium, and small] Introduction With the increasing popularity of Internet applications, the degree of information sharing is constantly increasing. The digitalization and network of embedded devices have become a
communicate indirectly.Group communication)1. The meaning of group communication, as its literal meaning, is communicated to each member within the group. Group communication can be used on some scenarios 1,. For replica updates, in terms of fault tolerance. 2. For system monitoring and management.2. Group
Communication is the transmission of information. Voice services have always been the "boss" in communications, whether it is now or before ". What are the differences and special characteristics of the speech service in the Unified Communication System? Let's take a look at how the director of the industry voice representative Avaya introduced it. What is the ta
A Unified Communication System that is intertwined in communications and networks brings intelligent and information-based work models to enterprises. However, although many enterprise vendors are optimistic about this platform, competition is everywhere. So let's analyze the advantages of the Unified Communication System
Malls, such as battlefields, cannot escape the definition of Unified Communication. How can we prepare for this battle when we decide to purchase a solution or product? The so-called "Know Yourself" and "Know Yourself" cannot be defeated. Let's take a look at the contents of the Unified Communication system first. According to a speech made by a Communications Ma
When we deploy a Unified Communication System, the most important thing is the convenient service that unified communication brings to us. Therefore, as the purpose of our deployment, the quality of service is particularly important. So what should we pay attention to in the Quality application of Unified Communication
Today we are going to talk about interprocess communication in Linux system programming, and we discussed the basic operation of the process in the previous section. In this section, we will discuss inter-process communication.Common inter-process communication methods are: Nameless pipes, Named pipes, signals, shared memory, message queues, semaphores, sockets.
' completely:public Class Client { ...... @Autowired private IProductFactory productFactory; public void someMethod() { IProduct product = productFactory.getProduct(); ...... }}The following is the spring configuration informationid="productFactory"class=".......ProductAFactory"/>2-3, RPC noun:Now the industry mainstream RPC technology has been mentioned in the previous article. Here in order to facilitate everyone to find the rhythm, and then a general introductio
The simulated cellular mobile communication system is a cell-based, large-capacity public mobile phone system. It adopts the Frequency Multiplexing Technology and has many users and wide coverage. It has been widely used in the world. This section describes the composition, working principle, and working process of the simulated cellular mobile
I. INTRODUCTION and Agreementpreviously developed a project-in-vehicle navigation system. The first problem encountered is how the hardware device communicates with the server. The key is the communication protocol!As we all know: in order to realize communication, communication agreement must be reached by both partie
Communication ManagementI. Communication and management content Start Plan Perform Monitoring Closure Communication Management Develop a communication management plan Information release 1. Performance report2. Stakeholder Management
IPC (inter-process communication, interprocess communication) can have three ways of sharing information (along with the file system, with the kernel, with shared memory). (Of course, although it is interprocess communication, it can also be connected with threads).The relative IPC continuity (persistence of IPC Object
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