Android 启动socket 失败:socket(af_inet sock_stream 0) 返回-1 原因权限问题, 应该添加如下权限: <uses-permission android:name="android.permission.INTERNET" />
预编译 这里有#ifdef HAVE_SYS_SOCKET_H 所以需要 #define HAVE_SYS_SOCKET_H 不然编译的时候不会载入 sys/socket.h
error: ‘AF_INET’ was not declared in this scope int sockfd = socket(AF_INET, SOCK_STREAM, 0); 这个错误提示意味着在代码中没有正确引入AF_INET的声明。AF_INET是用于IPv4地址族的常量,在使用socket函数时需要引入对应的头文件。 你可以尝试在代码开头添加以下头文件引入语句: #include<sys/socket.h> ...
int sock, ret, on; struct sockaddr_in servaddr; /* Create a new stream (TCP) socket */ sock = socket( AF_INET, SOCK_STREAM, 0 ): /* Enable address reuse */on = 1; ret = setsockopt( sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on) );/* Allow connections to port 8080 fro...
Other errors may be generated by the underlying protocol modules.例子：clientfd = socket(AF_INET, SOCK_STREAM, 0);if (clientfd < 0) { LOG_RECORD(LOG_ERR, "Create socket error.");return -1;} ret = connect(clientfd, (struct sockaddr *)&host_addr, sizeof(host_addr));...
Function: int socket (int namespace, int style, int protocol)This function creates a socket and specifies communication style style, which should be one of the socket styles listed in 16.2 Communication Styles. The namespace argument specifies the namespace; it must be PF_LOCAL (...
在使用套接字之前，必须先初始化。WSADATA wsaData;WORD sockVer = MAKEWORD(2, 2);WSAStartup(sockVer, &wsaData);
/*创建套接字*/sockfd= socket(AF_INET, SOCK_STREAM,0);if(sockfd == -1) { perror("create socket error"); exit(1); }intreuse =1;if(setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,&reuse,sizeof(reuse))) { perror("setsockopt failed"); ...
socket(af_inet, sock_stream, 0)返回值解析 socket(af_inet, sock_stream, 0)函数的含义: socket()函数是一个系统调用,用于创建一个新的套接字。该函数接受三个参数: af_inet:指定地址族(Address Family),这里表示使用IPv4地址。 sock_stream:指定套接字类型(Socket Type),这里表示使用面向连接的TCP套接...
sock_fd = socket(AF_INET, SOCK_STREAM, 0); if(sock_fd == -1) { osDelay(1000); //1秒 } else { res = connect(sock_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); if(0 == res) { static s8 recv_flag; while(1) { //接收 recv_flag = recv(sock_fd,recv_...