normally, the functions used in network programming are ssize_t read (int fd, void * buf, size_t nbyte) ssize_t write (int fd, const void * buf, size_t nbytes) to transmit byte by byte. but usually, a word in Chinese accounts for 2 to 3 bytes, so g...
Under what circumstances will recvfrom return Invalid argument? I have set the last two parameters to nullptr , but this still happens . the general process is as follows: class socketTCP { public: ... private: int fdTCP; int fdUDP; }; b...
usually the server establishes multiple connections with the client, and the server accepts multiple connection requests. Can a node create multiple socket to connect to multiple nodes? ...
according to the 1m size of one thread two or three hundred concurrent threads are only two or three hundred megabytes. memory should not be the bottleneck so what is the bottleneck of tomcat? ...
1. When I read the socket connection, the book will use the memset or bzero function to zero the address structure bzero (& server_addr,sizeof (server_addr)); server_addr.sin_family = AF_INET; inet_pton (AF_INET, ip, & server_addr.sin_addr); server...
when the company s internal network accesses our own background, the connection often times out. However, there is no problem with visiting other websites. As long as we do not use our company s local area network, we can normally access the background...
this is true. I would like to add a function: the server creates a timer thread to regularly poll to detect sockfd activity, shutting down sockfd that has not been active for a long time but I don t know how to judge whether a sockfd is active or not...
terminate called after throwing an instance of std::system_error what (): Resource temporarily unavailable The code throws this error and then terminates what s going on ...
the case is that there is a device: on server A oai0 Link encap:AMPR NET ROM HWaddr inet addr:10.0.1.1 Bcast:10.0.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 ov...
in order to avoid group problems, only one worker process is used to listen, and it is controlled by accept_mutex (the current version seems to have a new processing method turned off by default, so let s just say I m talking about turning on the old v...
there is a little doubt about the queue in the soft exam "Software designer tutorial ". my understanding of the queue: when the queue is empty, front=rear=null, has no problem pointing two pointers to the bottom line. after joining the queue ...
$a=array ( 2 ); $b=array ( axiom = > 3 ); replace the values of the same keys in two arrays. how to become $c=array ( axiom = > 3century grammatical = > 2 ); except for the array_merge () function. ...
: <el-form-item label=":" :label-width="formLabelWidth" prop="installed_path"> <el-input v-if="editMode" class="edit-input" size="small" v-model.trim="installed_path" :placeho...
problem description how ant-design component library form forms are asynchronously checked the environmental background of the problems and what methods you have tried I use the set of things that redux, does not maintain state, internally and I u...
Under Xcode9.3, what is the difference between block body self- > and direct self call? Why does Apple officially recommend using self-? what is the principle? -(MJRefreshNormalHeader *) refreshHeader { if (!_refreshHeader) { _refreshHeader = [MJR...