{"id":3481,"date":"2017-08-05T13:41:37","date_gmt":"2017-08-05T05:41:37","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3481"},"modified":"2017-08-05T13:41:37","modified_gmt":"2017-08-05T05:41:37","slug":"linux%e4%b8%8b%e8%8e%b7%e5%8f%96%e6%89%80%e6%9c%89ip%e5%9c%b0%e5%9d%80%e5%b9%b6%e5%ad%98%e6%94%be%e5%9c%a8%e4%b8%80%e4%b8%aa%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3481.html","title":{"rendered":"Linux\u4e0b\u83b7\u53d6\u6240\u6709IP\u5730\u5740\u5e76\u5b58\u653e\u5728\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d"},"content":{"rendered":"

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\u6ce8\u610f\uff1a\u5f53\u5934\u6587\u4ef6include\u4e0d\u5168\u65f6\u53ef\u80fd\u4f1a\u5bfc\u81f4core dump\uff0c\u800c\u4e14\u4e0d\u6613\u5b9a\u4f4d\uff0c\u6240\u4ee5\u5efa\u8bae\u5728\u4f7f\u7528\u4e4b\u524d\u597d\u597d\u67e5\u4e00\u4e0b\u9700\u8981\u5305\u542b\u7684\u5934\u6587\u4ef6\u5217\u8868\u3002<\/p>\n

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#include <stdio.h><\/code><\/div>\n
#include <sys\/socket.h><\/code><\/div>\n
#include <sys\/ioctl.h><\/code><\/div>\n
#include <linux\/netdevice.h><\/code><\/div>\n
#include <arpa\/inet.h><\/code><\/div>\n
#include <netinet\/in.h><\/code><\/div>\n
#include <unistd.h><\/code><\/div>\n
#include <string.h><\/code><\/div>\n
<\/div>\n
#ifndef IP_LEN<\/code><\/div>\n
#define IP_LEN\u00a0<\/code>256<\/code><\/div>\n
#endif<\/code><\/div>\n
char<\/code>\u00a0ip[IP_LEN] =\u00a0<\/code>\"\\0\"<\/code>;<\/code><\/div>\n
<\/div>\n
\/\/ AF_INET, AF_INET6<\/code><\/div>\n
int<\/code>\u00a0print_addresses(<\/code>const<\/code>\u00a0int<\/code>\u00a0domain)<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0ssssss;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>ssssss = socket(domain, SOCK_STREAM,\u00a0<\/code>0<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(ssssss <\u00a0<\/code>0<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>perror(<\/code>\"socket\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a01<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>struct ifconf ifconf;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>struct ifreq ifr[<\/code>50<\/code>];<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>ifconf.ifc_buf = (<\/code>char<\/code>\u00a0*) ifr;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>ifconf.ifc_len = sizeof ifr;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(ioctl(ssssss, SIOCGIFCONF, &ifconf) == -<\/code>1<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>perror(<\/code>\"ioctl\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a01<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0a_ip[INET_ADDRSTRLEN];<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"INET_ADDRSTRLEN = %d\\n\"<\/code>, INET_ADDRSTRLEN);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>struct sockaddr_in *s_in;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0ifs;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>ifs = ifconf.ifc_len \/ sizeof(ifr[<\/code>0<\/code>]);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"interfaces = %d:\\n\"<\/code>, ifs);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0i;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>for<\/code>\u00a0(i =\u00a0<\/code>0<\/code>; i < ifs; i++) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>s_in = (struct sockaddr_in *) &ifr[i].ifr_addr;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(!inet_ntop(domain, &s_in->sin_addr, a_ip, sizeof(a_ip))) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>perror(<\/code>\"inet_ntop\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a01<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"%s - %s\\n\"<\/code>, ifr[i].ifr_name, a_ip);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(strcmp(a_ip,\u00a0<\/code>\"127.0.0.1\"<\/code>)) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"strncat(*, *, %d)\\n\"<\/code>, IP_LEN-strlen(ip)-<\/code>1<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>strncat(ip, a_ip, IP_LEN-strlen(ip)-<\/code>1<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(i+<\/code>1<\/code>\u00a0< ifs) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>strcat(ip,\u00a0<\/code>\",\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"\\nip = %s\\n\"<\/code>, ip);<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>close(ssssss);<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a00<\/code>;<\/code><\/div>\n
}<\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0main(<\/code>int<\/code>\u00a0argc,\u00a0<\/code>char<\/code>\u00a0const<\/code>\u00a0*argv[])<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>print_addresses(AF_INET);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a00<\/code>;<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n