server.c#include
#include
#include
#include
#include
#include
#include
#define DEFAULTPORT 2014
#define DEFAULT_BACKLOG 20
int main(int argc ,char *argv[])
{
struct sockaddr_in socket_addr;
struct sockaddr_in socket_acpt;
char buf[30] = {0};
int recv_len;
int acpt_len = sizeof(struct sockaddr_in);
int accept_clt;
memset(&socket_addr, 0, sizeof(socket_addr));
socket_addr.sin_family = AF_INET;
socket_addr.sin_port = htons(DEFAULTPORT);
socket_addr.sin_addr.s_addr = htons(INADDR_ANY);
bzero(&(socket_addr.sin_zero), 8);
int socket_fd = socket(PF_INET, SOCK_STREAM, 0);
if (socket_fd == -1){
printf("Socket Error log is : %s\n", strerror(errno));
close(socket_fd);
exit(0);
}
if (bind(socket_fd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr_in)) == -1){
printf("Bind Error log is : %s\n", strerror(errno));
close(socket_fd);
exit(0);
}
else
{
if (listen(socket_fd, DEFAULT_BACKLOG) == -1){
printf("Listen Error log is : %s\n", strerror(errno));
close(socket_fd);
exit(0);
}
else
{
while(1){
accept_clt = accept(socket_fd, (struct sockaddr *)&socket_acpt, (socklen_t *)&acpt_len);
if(accept_clt == -1){
printf("Accept Error log is : %s\n", strerror(errno));
close(socket_fd);
exit(0);
}
printf("received a connection from %s\n", inet_ntoa(socket_acpt.sin_addr));
recv_len = recv(accept_clt, buf, sizeof(buf), MSG_WAITALL);
if (recv_len == -1){
printf("Accept Error log is : %s\n", strerror(errno));
close(socket_fd);
exit(0);
}
printf("recv data : %s\n", buf);
memset(buf, 0, sizeof(buf));
}
}
}
return 0;
}
client.c
#include
#include
#include
#include
#include
#include
#include
#include
#define DEFAULTPORT 2014
#define DEFAULT_BACKLOG 20
int main(int argc ,char *argv[])
{
struct sockaddr_in socket_addr;
struct hostent *host;
if (argc < 2) {
fprintf(stderr,"Please enter what you want to send !\n");
exit(1);
}
if((host=gethostbyname("127.0.0.1")) == NULL) {
herror("gethostbyname error !");
exit(1);
}
socket_addr.sin_family = AF_INET;
socket_addr.sin_port = htons(DEFAULTPORT);
socket_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(socket_addr.sin_zero), 8);
int socket_fd = socket(PF_INET, SOCK_STREAM, 0);
if (socket_fd == -1)
printf("Socket Error log is : %s\n", strerror(errno));
if (connect(socket_fd, (struct sockaddr *)&socket_addr, sizeof(struct sockaddr)) == -1) {
perror("connect error !");
}
if (send(socket_fd, argv[1], 40, 0) == -1){
perror("send error !");
close(socket_fd);
}
return 0;
}
注意：
1 出现Transport endpoint is not connected错误，可能是由于send, recv时候，所选的socket_fd不对，应该选accept的返回的socketfd，这个新socketfd是真正的send,recv所用的socketfd，而不socket()出来的。
2 client地址配为127.0.0.1, server配为INADDR_ANY。
3 查看server启动起来没有，可以用命令netstat -na | grep 端口号（本例为2014）
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