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ioctl-test.c
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/*
file:
author:steven
create:2013-3-30
description:利用ioctl查看网络IP、mask、broadaddr
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
void usage()
{
printf("usage:ipconfig interface\n");
exit(1);
}
int main(int argc,char** argv)
{
struct sockaddr_in *addr;
struct ifreq ifr;
char *name,*address;
int sockfd;
if(argc != 2) usage();
else name = argv[1];
sockfd = socket(AF_INET,SOCK_DGRAM,0);
strncpy(ifr.ifr_name,name,IFNAMSIZ-1);
if(ioctl(sockfd,SIOCGIFADDR,&ifr) == -1)
perror("ioctl error\n"),exit(1);
addr = (struct sockaddr_in *)&(ifr.ifr_addr);
address = inet_ntoa(addr->sin_addr);
printf("inet addr:%s\n",address);
if(ioctl(sockfd,SIOCGIFNETMASK,&ifr) == -1)
perror("ioctl error\n"),exit(1);
addr = (struct sockaddr_in*)&(ifr.ifr_addr);
address = inet_ntoa(addr->sin_addr);
printf("mask:%s\n",address);
if(ioctl(sockfd,SIOCGIFBRDADDR,&ifr) == -1)
perror("ioctl error\n"),exit(1);
addr = (struct sockaddr_in*)&(ifr.ifr_broadaddr);
address = inet_ntoa(addr->sin_addr);
printf("broadaddr:%s\n",address);
return 0;
}
/*==================================================
int ioctl(int fd, int request, …/*void *arg */);
返回：成功返回0，出错返回-1；
==================================================*/
/*--------------------------------------------------------------
类别 Request 说明 数据类型
===============================================================
套 SIOCATMARK 是否位于带外标记 int
接 SIOCSPGRP 设置套接口的进程ID 或进程组ID int
口 SIOCGPGRP 获取套接口的进程ID 或进程组ID int
================================================================
文 FIONBIN 设置/ 清除非阻塞I/O 标志 int
件 FIOASYNC 设置/ 清除信号驱动异步I/O 标志 int
FIONREAD 获取接收缓存区中的字节数 int
FIOSETOWN 设置文件的进程ID 或进程组ID int
FIOGETOWN 获取文件的进程ID 或进程组ID int
==================================================================
接 SIOCGIFCONF 获取所有接口的清单 struct ifcon
口 SIOCSIFADDR 设置接口地址 struct ifreq
SIOCGIFADDR 获取接口地址 struct ifreq
SIOCSIFFLAGS 设置接口标志 struct ifreq
SIOCGIFFLAGS 获取接口标志 struct ifreq
SIOCSIFDSTADDR 设置点到点地址 struct ifreq
SIOCGIFDSTADDR 获取点到点地址 struct ifreq
SIOCGIFBRDADDR 获取广播地址 struct ifreq
SIOCSIFBRDADDR 设置广播地址 struct ifreq
SIOCGIFNETMASK 获取子网掩码 struct ifreq
SIOCSIFNETMASK 设置子网掩码 struct ifreq
SIOCGIFMETRIC 获取接口的测度 struct ifreq
SIOCSIFMETRIC 设置接口的测度 struct ifreq
SIOCGIFMTU 获取接口MTU struct ifreq
SIOCxxx （还有很多取决于系统的实现）
================================================================
ARP SIOCSARP 创建/ 修改ARP 表项 struct arpreq
SIOCGARP 获取ARP 表项 struct arpreq
SIOCDARP 删除ARP 表项 struct arpreq
================================================================
路 SIOCADDRT 增加路径 struct rtentry
由 SIOCDELRT 删除路径 struct rtentry
------------------------------------------------------------------*/
/*--------------------------------------------------------------
struct ifreq
{
#define IFHWADDRLEN 6
union
{
char ifrn_name[IFNAMSIZ];
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ];
char ifru_newname[IFNAMSIZ];
void __user * ifru_data;
struct if_settings ifru_settings;
} ifr_ifru;
};
#define ifr_name ifr_ifrn.ifrn_name
#define ifr_hwaddr ifr_ifru.ifru_hwaddr
#define ifr_addr ifr_ifru.ifru_addr
#define ifr_dstaddr ifr_ifru.ifru_dstaddr
#define ifr_broadaddr ifr_ifru.ifru_broadaddr
#define ifr_netmask ifr_ifru.ifru_netmask
#define ifr_flags ifr_ifru.ifru_flags
#define ifr_metric ifr_ifru.ifru_ivalue
#define ifr_mtu ifr_ifru.ifru_mtu
#define ifr_map ifr_ifru.ifru_map
#define ifr_slave ifr_ifru.ifru_slave
#define ifr_data ifr_ifru.ifru_data
#define ifr_ifindex ifr_ifru.ifru_ivalue
#define ifr_bandwidth ifr_ifru.ifru_ivalue
#define ifr_qlen ifr_ifru.ifru_ivalue
#define ifr_newname ifr_ifru.ifru_newname
#define ifr_settings ifr_ifru.ifru_settings
----------------------------------------------------------------*/