1.recv triggering
The wrong socket, the listening socket and connect socket misuse. Examples are as follows:
for(;;){
socklen_t len = sizeof(client_address);
connfd = accept(listenfd, (struct sockaddr *)&client_address, &len);
if(connfd < 0){
printf("accept error: %s\n", strerror(errno));
}
printf("server get connection from %s\n", inet_ntop(AF_INET, &client_address.sin_addr, buff, sizeof(buff)));
if((n = read(listenfd, message, 1024)) == -1){
printf("read error: %s\n", strerror(errno));
exit(1);
}
message[n] = '\0';
printf("receive the message of client: %s\n", message);
close(connfd);
}Receiving a client link request above code for the server-side and displays information client pass over, Accept the function returns successfully a new descriptor kernel generated is assigned to connfd, so after the call to read () function, the first parameter should It is connfd instead listenfd. So the code line 9 should read
if((n = read(connfd, message, 1024)) == -1){ 2.shutdown triggering
Case, the client socket has been shut down, the server socket call shutdown occurs this error.
