Linux C实现发邮件功能 - Trace...

时间 2014-02-28 17:39:00 博客园-所有随笔区

原文  http://www.cnblogs.com/funnylinux/p/3574050.html

主题 Linux

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <netdb.h>#include <sys/socket.h>#include <sys/types.h>#include <netinet/in.h>#include <arpa/inet.h>#include <sys/fcntl.h>#include <sys/stat.h> #define SOCKET_ERROR -1#define IPSTR "220.181.12.12"#define PRINT(x) printf("%s\n",(x)) int sockfd;int ret;char *send_data;char *recv_data;char From[128];char To[128];char Date[128];char Subject[512];char Context[6000]={0};char buffer[1024];int connectHost(const char *smtpaddr){    struct sockaddr_in servaddr;    sockfd = socket(AF_INET,SOCK_STREAM,0);    if(sockfd < 0)    {        printf("Create socket error!\n");        return -1;    }    bzero(&servaddr,sizeof(servaddr));    servaddr.sin_family = AF_INET;    servaddr.sin_port = htons(25);        if(inet_pton(AF_INET, IPSTR, &servaddr.sin_addr) <= 0 )     {        printf("inet_pton error!\n");        return -1;    };    if (connect(sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr)) < 0)        {        printf("Connect failed... \n");        return -1;    }    printf("Connect to %s.... \n", IPSTR);         memset(buffer, 0, sizeof(buffer));         if(recv(sockfd, buffer, sizeof(buffer), 0) < 0)    {            printf("receive failed... \n");        return -1;    }    else     {                 printf("%s\n", buffer);    }    return sockfd;    } int getResponse(){        memset(buffer,0,sizeof(buffer));    ret = recv(sockfd,buffer,1024,0);    if(ret == SOCKET_ERROR)    {        printf("receive nothing\n");        return -1;    }    buffer[ret]='\0';         if(*buffer == '5')    {        printf("the order is not support smtp host\n ");        return -1;    }    printf("recieved buffer:%s\n",buffer);    return 0;} int login(char *username,char *password){    printf("login.....sockfd: %d\n",sockfd);    char ch[100];    if(username == "" || password == "")        return -1;         send_data = "HELO 163.com\r\n";    printf("%s\n",send_data);    ret = send(sockfd, send_data, strlen(send_data), 0);    if(ret == SOCKET_ERROR)    {        close(sockfd);        return -1;    }             if(getResponse() < 0)        return -1;         send_data = "AUTH LOGIN\r\n";    printf("%s\n",send_data);    ret = send(sockfd, send_data, strlen(send_data), 0);    if(ret == SOCKET_ERROR)    {        close(sockfd);        return -1;    }    if(getResponse() < 0)        return -1;    sprintf(ch, "%s\r\n", username);    printf("%s\n",ch);    ret = send(sockfd, (char *)ch, strlen(ch),0);    if(ret == SOCKET_ERROR)    {        close(sockfd);        return -1;    }         if(getResponse() < 0)         return -1;         sprintf(ch,"%s\r\n",password);    printf("%s\n",ch);    ret = send(sockfd,(char *)ch,strlen(ch),0);    if(ret == SOCKET_ERROR)    {        close(sockfd);        return -1;    }         if(getResponse() < 0)        return -1;         return 0; } int sendmail(char* from, char * to, char * subject, char * context){    if(from =="" ||to == ""||subject == ""||context == "")    {        printf("arguments error!\n");        return -1;    }        sprintf(From, "MAIL FROM: <%s>\r\n", from);    printf("%s\n",From);         if((ret = send(sockfd, From, strlen(From), 0)) == SOCKET_ERROR)    {        close(sockfd);        return -1;    }         if(getResponse() < 0)        return -1;         sprintf(To, "RCPT TO: <%s>\r\n", to);    if((ret = send(sockfd, To, strlen(To),0)) == SOCKET_ERROR)    {        close(sockfd);        return -1;    }    if(getResponse() < 0)        return -1;         send_data = "DATA\r\n";    if((ret = send(sockfd,send_data,strlen(send_data),0)) == SOCKET_ERROR)    {        close(sockfd);        return -1;    }    if(getResponse() < 0)        return -1;            memset(Subject, 0, sizeof(Subject));    sprintf(Subject, "Subject: %s\r\n", subject);    strcat(Context, Subject);    strcat(Context, "\r\n\r\n");    //strcat(Context,context);    strcat(Context,"\r\n.\r\n");    if((ret= send(sockfd, Context, strlen(Context), 0)) == SOCKET_ERROR)    {        close(sockfd);        return -1;    }         printf("ret size:%d\n", ret);        memset(buffer, '\0', sizeof(buffer));        if(getResponse() < 0)         return -1;         printf("QUIT!!!!!!!!!!!!!!!!\n");    if((ret = send(sockfd,"QUIT\r\n",strlen("QUIT\r\n"), 0)) == SOCKET_ERROR)    {        close(sockfd);        return -1;    }    if(getResponse() < 0)        return -1;     printf("Send Mail Successful!\n");    return 0;} int main(){        char from[128] = "[e-mail]";    char to[128] = "[e-mail]";    char subject[512] = "test....";    char context[6000] = "Just a test.........\n";    char server[56]="smtp.163.com";    char *name ="ZnVubnlsaW51eEAxNjMuY29t";//base64    char *passwd = "YWk1MjQwMzI=";//base64     if(connectHost(server)<0)    {        printf("Can Not LOGIN !\n");        return -1;    }     if(login(name, passwd) < 0)    {        fprintf(stderr,"Can Not LOGIN !\n");        return -1;    }    sendmail(from, to, subject, context);    return 0; }