网络编程_简单客户端和服务器实现

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//hello_server_simple 服务器端// run  ./hello_server_simple 8000#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <arpa/inet.h>#include <sys/socket.h>int main(int argc, char* argv[]){int serv_sock;int clnt_sock;struct sockaddr_in serv_addr;struct sockaddr_in clnt_addr;socklen_t clnt_addr_size;char message[] = "Hello World!";serv_sock = socket(PF_INET, SOCK_STREAM, 0);memset(&serv_addr, 0, sizeof(serv_addr));serv_addr.sin_family = AF_INET;serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);serv_addr.sin_port = htons(atoi(argv[1]));bind(serv_sock, (struct sockaddr*) &serv_addr, sizeof(serv_addr));listen(serv_sock, 5);clnt_addr_size = sizeof(clnt_addr);clnt_sock = accept(serv_sock, (struct sockaddr*) &clnt_addr, &clnt_addr_size);write(clnt_sock, message, sizeof(message));close(clnt_sock);close(serv_sock);return 0;}

//hello_client_simple  客户端//run hello.client_simple 127.0.0.1 8000#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <arpa/inet.h>#include <sys/socket.h>int main(int argc, char* argv[]){int sock;struct sockaddr_in serv_addr;char message[30];int str_len;sock = socket(PF_INET, SOCK_STREAM,0);memset(&serv_addr, 0, sizeof(serv_addr));serv_addr.sin_family = AF_INET;serv_addr.sin_addr.s_addr = inet_addr(argv[1]);serv_addr.sin_port = htons(atoi(argv[2]));connect(sock, (struct sockaddr*) &serv_addr, sizeof(serv_addr));str_len = read(sock, message, sizeof(message)-1);printf("message from server: %s \n", message);close(sock);return 0;}

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