C语言检查本机公网IP并发送邮件
附上资源下载地址
免费下载地址在 http://linux.linuxidc.com/
用户名与密码都是www.linuxidc.com
具体下载目录在 /2014年资料/5月/19日/C语言检查本机公网IP并发送邮件
下载方法见 http://www.linuxidc.com/Linux/2013-07/87684.htm
发送邮件的函数是百度上copy的,只是简单的修改了一下
#include
#include
#include
#include
#include
#include
#define N 500
using namespace std;
#pragma comment(lib, “ws2_32.lib”)
#pragma comment(lib,”urlmon.lib”)
struct Base64Date6
{
unsigned int d4:6;
unsigned int d3:6;
unsigned int d2:6;
unsigned int d1:6;
};
// 协议中加密部分使用的是base64方法
char ConvertToBase64 (char c6);
void EncodeBase64 (char *dbuf, char *buf128, int len);
void SendMail (char *emailTo,char *emailFrom,char *emailPd,char *body);
int OpenSocket (struct sockaddr *addr);
int CheckIP(char currentIP[]) //0读取文件失败,1IP非信任 2下载文件失败 3信任的IP地址
{
HRESULT hr=URLDownloadToFile(0,”http://www.ip138.com/ips1388.asp”,”currentIP.txt”,0,NULL);
if(hr!=S_OK)
{
return 2;
}
ifstream readFile(“IPlist.txt”);
if(!readFile)
{
cout<<"Can't find IPlist.txt"<
}
char listIP[N];
readFile.getline(listIP,N,’\n’);
readFile.close();
readFile.clear();
readFile.open(“currentIP.txt”);
if(!readFile)
{
cout<<"Can't find currentIP.txt"<
}
char readTemp[N*4];
while(!readFile.eof())
{
readFile.getline(readTemp,N*4,’\n’); //getline函数参数说明:参数1–>指针头,参数2–>最大读取值,参数3–>读取结束符
if(readFile.fail()) break;
else
{
char *temp=strstr(readTemp,”您的IP地址是”);
if(temp!=NULL)
{
temp=strchr(temp,'[‘);
for(int i=0;;i++)
{
if(temp[i+1]==’]’)
{
currentIP[i]=’\0′;
break;
}
else
currentIP[i]=temp[i+1];
}
break;
}
}
}
readFile.close();
readFile.clear();
char *p=strstr(listIP,currentIP);
if(p!=NULL)
{
cout<<"Been trusted!"<
}
else
{
cout<<"Unknown Address!Send E-mail immediately!"<
}
}
int main()
{
char currentIP[16];
int n=0,ir;
while(1)
{
ir=CheckIP(currentIP);
if(ir==2)
{
if(n!=10)
{
cout<<"Connection failed...It's too bad!I will try again one minute later."<
Sleep(60*1000);
}
else
{
cout<<"Connection failed for 10 times.Application will exit immediately!"<
}
}
else
break;
}
if(ir==0)
{
cout<<"Read file error!Application will exit immediately!"<
}
else if(ir==3)
{
cout<<"Been trusted!Have fun!"<
}
else
{
char emailTo[100];
char emailFrom[100];
char emailPd[100];
fstream readFile(“email.ini”);
if(!readFile)
{
cout<<"Can't open email.ini"<
}
while(!readFile.eof())
{
readFile.getline(emailTo,100,’\n’); //getline函数参数说明:参数1–>指针头,参数2–>最大读取值,参数3–>读取结束符
readFile.getline(emailFrom,100,’\n’);
readFile.getline(emailPd,100,’\n’);
}
readFile.close();
readFile.clear();
char EmailContents[N] = “From: \”YourPC\”
“To: \”MyMaster\”
“Subject: IP address has been changed!\r\n\r\n”;
strcat(EmailContents,”The address is:”);
strcat(EmailContents,currentIP);
strcat(EmailContents,”!!!Please check!”);
SendMail(emailTo,emailFrom,emailPd,EmailContents);
return 0;
}
}
char ConvertToBase64(char uc)
{
if(uc < 26)
{
return ‘A’ + uc;
}
if(uc < 52)
{
return ‘a’ + (uc – 26);
}
if(uc < 62)
{
return ‘0’ + (uc – 52);
}
if(uc == 62)
{
return ‘+’;
}
return ‘/’;
}
// base64的实现
void EncodeBase64(char *dbuf, char *buf128, int len)
{
struct Base64Date6 *ddd = NULL;
int i = 0;
char buf[256] = {0};
char *tmp = NULL;
char cc = ‘\0’;
memset(buf, 0, 256);
strcpy_s(buf, 256, buf128);
for(i = 1; i <= len/3; i++)
{
tmp = buf + (i-1)*3;
cc = tmp[2];
tmp[2] = tmp[0];
tmp[0] = cc;
ddd = (struct Base64Date6 *)tmp;
dbuf[(i-1)*4+0] = ConvertToBase64((unsigned int)ddd->d1);
dbuf[(i-1)*4+1] = ConvertToBase64((unsigned int)ddd->d2);
dbuf[(i-1)*4+2] = ConvertToBase64((unsigned int)ddd->d3);
dbuf[(i-1)*4+3] = ConvertToBase64((unsigned int)ddd->d4);
}
if(len % 3 == 1)
{
tmp = buf + (i-1)*3;
cc = tmp[2];
tmp[2] = tmp[0];
tmp[0] = cc;
ddd = (struct Base64Date6 *)tmp;
dbuf[(i-1)*4+0] = ConvertToBase64((unsigned int)ddd->d1);
dbuf[(i-1)*4+1] = ConvertToBase64((unsigned int)ddd->d2);
dbuf[(i-1)*4+2] = ‘=’;
dbuf[(i-1)*4+3] = ‘=’;
}
if(len%3 == 2)
{
tmp = buf+(i-1)*3;
cc = tmp[2];
tmp[2] = tmp[0];
tmp[0] = cc;
ddd = (struct Base64Date6 *)tmp;
dbuf[(i-1)*4+0] = ConvertToBase64((unsigned int)ddd->d1);
dbuf[(i-1)*4+1] = ConvertToBase64((unsigned int)ddd->d2);
dbuf[(i-1)*4+2] = ConvertToBase64((unsigned int)ddd->d3);
dbuf[(i-1)*4+3] = ‘=’;
}
return;
}
// 发送邮件
void SendMail(char *emailTo,char *emailFrom,char *emailPd,char *body)
{
int sockfd = {0};
char buf[1500] = {0};
char rbuf[1500] = {0};
char login[128] = {0};
char pass[128] = {0};
WSADATA WSAData;
struct sockaddr_in their_addr = {0};
WSAStartup(MAKEWORD(2, 2), &WSAData);
memset(&their_addr, 0, sizeof(their_addr));
their_addr.sin_family = AF_INET;
their_addr.sin_port = htons(25);
hostent* hptr = gethostbyname(“smtp.163.com”);
memcpy(&their_addr.sin_addr.S_un.S_addr, hptr->h_addr_list[0], hptr->h_length);
printf(“IP of smpt.163.com is : %d:%d:%d:%d\n”,
their_addr.sin_addr.S_un.S_un_b.s_b1,
their_addr.sin_addr.S_un.S_un_b.s_b2,
their_addr.sin_addr.S_un.S_un_b.s_b3,
their_addr.sin_addr.S_un.S_un_b.s_b4);
// 连接邮件服务器,如果连接后没有响应,则2 秒后重新连接
sockfd = OpenSocket((struct sockaddr *)&their_addr);
memset(rbuf, 0, 1500);
while(recv(sockfd, rbuf, 1500, 0) == 0)
{
cout<<"reconnect..."<
sockfd = OpenSocket((struct sockaddr *)&their_addr);
memset(rbuf, 0, 1500);
}
cout<
sprintf_s(buf, 1500, “EHLO HYL-PC\r\n”);
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"EHLO REceive: "<
sprintf_s(buf, 1500, “AUTH LOGIN\r\n”);
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"Auth Login Receive: "<
sprintf_s(buf, 1500, emailFrom);//你的邮箱账号
memset(login, 0, 128);
EncodeBase64(login, buf, strlen(buf));
sprintf_s(buf, 1500, “%s\r\n”, login);
send(sockfd, buf, strlen(buf), 0);
cout<<"Base64 UserName: "<
recv(sockfd, rbuf, 1500, 0);
cout<<"User Login Receive: "<
memset(pass, 0, 128);
EncodeBase64(pass, buf, strlen(buf));
sprintf_s(buf, 1500, “%s\r\n”, pass);
send(sockfd, buf, strlen(buf), 0);
cout<<"Base64 Password: "<
cout<<"Send Password Receive: "<
char mailFrom[100]=”MAIL FROM: <";
strcat(mailFrom,emailFrom);
strcat(mailFrom,”>\r\n”);
memset(buf, 0, 1500);
sprintf_s(buf, 1500, mailFrom);
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"set Mail From Receive: "<
sprintf_s(buf, 1500, “RCPT TO:<%s>\r\n”, emailTo);
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"Tell Sendto Receive: "<
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"Send Mail Prepare Receive: "<
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"Send Mail Receive: "<
send(sockfd, buf, strlen(buf), 0);
memset(rbuf, 0, 1500);
recv(sockfd, rbuf, 1500, 0);
cout<<"Quit Receive: "<
WSACleanup();
return;
}
// 打开TCP Socket连接
int OpenSocket(struct sockaddr *addr)
{
int sockfd = 0;
sockfd=socket(PF_INET, SOCK_STREAM, 0);
if(sockfd < 0)
{
cout<<"Open sockfd(TCP) error!"<
}
if(connect(sockfd, addr, sizeof(struct sockaddr)) < 0)
{
cout<<"Connect sockfd(TCP) error!"<
}
return sockfd;
}
将C语言梳理一下,分布在以下10个章节中:
- Linux-C成长之路(一):Linux下C编程概要 http://www.linuxidc.com/Linux/2014-05/101242.htm
- Linux-C成长之路(二):基本数据类型 http://www.linuxidc.com/Linux/2014-05/101242p2.htm
- Linux-C成长之路(三):基本IO函数操作 http://www.linuxidc.com/Linux/2014-05/101242p3.htm
- Linux-C成长之路(四):运算符 http://www.linuxidc.com/Linux/2014-05/101242p4.htm
- Linux-C成长之路(五):控制流 http://www.linuxidc.com/Linux/2014-05/101242p5.htm
- Linux-C成长之路(六):函数要义 http://www.linuxidc.com/Linux/2014-05/101242p6.htm
- Linux-C成长之路(七):数组与指针 http://www.linuxidc.com/Linux/2014-05/101242p7.htm
- Linux-C成长之路(八):存储类,动态内存 http://www.linuxidc.com/Linux/2014-05/101242p8.htm
- Linux-C成长之路(九):复合数据类型 http://www.linuxidc.com/Linux/2014-05/101242p9.htm
- Linux-C成长之路(十):其他高级议题
C++ Primer Plus 第6版 中文版 清晰有书签PDF+源代码 http://www.linuxidc.com/Linux/2014-05/101227.