getaddrinfo函数实例--网上考的

来源：互联网发布：Ht.js 编辑：程序博客网时间：2024/04/30 09:50

#include <sys/types.h>#include <sys/socket.h>#include <netdb.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <arpa/inet.h>int main(int argc, char **argv){    if (argc != 2) {        printf("Usag...\n");        exit(1);    }    struct addrinfo hints;    struct addrinfo *res, *cur;    int ret;    struct sockaddr_in *addr;    char ipbuf[16];    memset(&hints, 0, sizeof(struct addrinfo));    hints.ai_family = AF_INET; /* Allow IPv4 */    hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */    hints.ai_protocol = 0; /* Any protocol */    hints.ai_socktype = SOCK_STREAM;           ret = getaddrinfo(argv[1], NULL,&hints,&res);        if (ret == -1) {        perror("getaddrinfo");        exit(1);    }        for (cur = res; cur != NULL; cur = cur->ai_next) {        addr = (struct sockaddr_in *)cur->ai_addr;        printf("%s\n", inet_ntop(AF_INET, &addr->sin_addr, ipbuf, 16));    }    freeaddrinfo(res);    exit(0);}

输出：

@lang:~/node$ ./a.out www.google.com173.194.127.112173.194.127.113173.194.127.114173.194.127.115173.194.127.116

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