‘servaddr’的存储大小未知

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define MAXLINE 80
#define SERV_PORT 8000
int main(void)
{
struct scokaddr_in servaddr, cliaddr;
socklen_t cliaddr_len;
int listenfd, connfd;
char buf[MAXLINE];
char str[INET_ADDRSTRLEN];
int i, n;
listenfd = socket(AF_INET, SOCK_STREAM, 0);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERV_PORT);
bind(listenfd, (struct servaddr *)&servaddr, sizeof(servaddr));
listen(listenfd, 20);
printf("Accepting connecting...\n");
while(1)
{
cliaddr_len = sizeof(cliaddr);
connfd = accept(listenfd, (struct sockaddr *)&cliaddr, &cliaddr_len);
n = read(connfd, buf, MAXLINE);
printf("receive from %s at PORT %d\n", inet_port(AF_INET, &cliaddr.sin_addr, str, sizeof(str), ntoh(cliaddr.sin_port)));
for(i = 0; i < n; i++)
{
buf[i] = toupper(buf[i]);
}
write(connfd, buf, n);
close(connfd);
}
return 0;
}