95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/* File: main.c
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* ------------
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* 校园网802.1X客户端命令行
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* 子函数声明 */
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int Authentication(const char *UserName, const char *Password, const char *DeviceName, const char *Version, const char *Key);
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void convert(char *dest, char const *src);
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/**
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* 函数：main()
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*
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* 检查程序的执行权限，检查命令行参数格式。
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* 允许的调用格式包括：
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* njit-client username password
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* njit-client username password eth0
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* njit-client username password eth1
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* 若没有从命令行指定网卡，则默认将使用eth0
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*/
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int main(int argc, char *argv[])
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{
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char *UserName;
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char *Password;
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char *DeviceName;
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char *Version;
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char *Key;
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/* 检查当前是否具有root权限 */
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if (getuid() != 0) {
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fprintf(stderr, "抱歉，运行本客户端程序需要root权限\n");
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fprintf(stderr, "(RedHat/Fedora下使用su命令切换为root)\n");
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fprintf(stderr, "(Ubuntu/Debian下在命令前添加sudo)\n");
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exit(-1);
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}
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/* 检查命令行参数格式 */
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if (argc<3 || argc>6) {
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fprintf(stderr, "命令行参数错误！\n");
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fprintf(stderr, "正确的调用格式例子如下：\n");
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fprintf(stderr, " %s username password\n", argv[0]);
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fprintf(stderr, " %s username password eth0\n", argv[0]);
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fprintf(stderr, " %s username password eth0 version key\n", argv[0]);
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fprintf(stderr, "(注：若不指明网卡，默认情况下将使用eth0.2)\n");
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exit(-1);
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} else {
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if (argc > 3) {
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DeviceName = argv[3]; // 允许从命令行指定设备名
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} else {
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DeviceName = "eth0.2"; // 缺省情况下使用的设备
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}
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if (argc > 5) {
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Version = (char *)malloc(32 * sizeof(char));
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convert(Version, argv[4]);
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Key = argv[5];
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} else {
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Version = "CH\x11V7.10-0313";
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Key = "Oly5D62FaE94W7";
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}
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}
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UserName = argv[1];
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Password = argv[2];
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/* 调用子函数完成802.1X认证 */
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Authentication(UserName, Password, DeviceName, Version, Key);
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return (0);
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}
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void convert(char *dest, char const *src)
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{
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int i = 0, j = 0;
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int len = strlen(src);
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while (i < len) {
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if (src[i] == '\\' && i+3 < len && src[i+1] == 'x') {
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char s[3];
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s[0] = src[i+2];
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s[1] = src[i+3];
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s[2] = 0;
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char c;
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sscanf(s, "%x", &c);
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dest[j++] = c;
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i += 4;
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} else {
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dest[j++] = src[i++];
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}
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}
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dest[j] = 0;
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} |