p12-7.c

来自「SUN Solaris8平台下进程间通信」· C语言 代码 · 共 37 行

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
void init_sockaddr(struct sockaddr_in *name, const char *hostname, 
                     const char *serv)
{
    struct hostent *hp;
    char *host,myname[255];
    if (hostname == NULL){
        gethostname(myname, sizeof(myname));
        host = myname;
    }
    else
        host = hostname;
    /* 获取主机地址信息 */
    if ((hp = gethostbyname(host)) == NULL){
        printf("Unknown host: %s\n", host);
        exit(-1);
    }
    /* 填入服务器的IP地址和端口 */
    bzero(name,sizeof(struct sockaddr));
    if (hp->h_addrtype == AF_INET){   
        name -> sin_family = AF_INET;
        bcopy(hp->h_addr_list[0], &name->sin_addr, hp->h_length);
        if (serv == NULL)
            name -> sin_port = htons(0);
        else
            name -> sin_port = htons(atoi(serv));
    }
    else {
        printf("Unknown address type\n");
        exit(-1);
    }
}