C语言编写smtp用户代理之代码综合和管理

前两章已经写好了必要的函数，现在写一个主函数调用就可以了。

#include<unistd.h>
#include"renyj_sock.h"
#include"smtp.h"
#include"mutils.h"
int main(int argc, char *argv[])
{
int opt = -1;
char from[100]  = "";
char to[100]    = "";
char server[100]= "";
char port[5]    = "";
char user[100]  = "";
char pass[100]  = "";
char subject[100]="";
char msgline[100]="";

while (-1 != (opt = getopt(argc,argv,"f:t:s:p:u:m:z:x:h")))
{
switch(opt)
{
case 'f':
strncpy(from,optarg,100);
if (strlen(from)<=0)
{
debug("invalid from ");
return -1;
}
break;
case 't':
strncpy(to,optarg,100);
if (strlen(to) <= 0)
{
debug("invalid to");
return -1;
}
break;
case 's':
strncpy(server,optarg,100);
if (strlen(server) <= 0)
{
debug("invalid server");
return -1;
}
break;
case 'p':
strncpy(port,optarg,5);
if (strlen(port) <= 0)
{
debug("invalid port");
return -1;
}
break;
case 'u':
strncpy(user,optarg,100);
if (strlen(user) <= 0)
{
debug("invalid user");
return -1;
}
break;
case 'm':
strncpy(pass,optarg,100);
if (strlen(pass) <= 0)
{
debug("invalid pass");
return -1;
}
break;
case 'z':
strncpy(subject,optarg,100);
if (strlen(subject) <= 0)
{
debug("invalid subject");
return -1;
}
break;
case 'x':
strncpy(msgline,optarg,100);
if (strlen(msgline) <= 0)
{
debug("need one line");
}
break;
case '?':
printf("unknow option %c\n",optopt);
case ':':
printf("use -h for help\n");
return -1;
case 'h':
printf("-f  mail from\n");
printf("-t  mail to\n");
printf("-s  mail server\n");
printf("-p  mail serverport\n");
printf("-u  mail user\n");
printf("-m  mail pass\n");
printf("-z  mail subject\n");
printf("-x  mail one line msg\n");
printf("All info should be less than 100 bytes,port should less than 5!!!\n");
return -1;
}
}
send_the_mail(from,to,server,atoi(port),user,pass,subject,msgline,10);
return 0;
}

这些都有了之后，写一个简单的Makefile。我使能了ssl，所以要加上openssl的库，需要 加上 -lssl 和 -lcrypto

obj = renyj_sock.c smtp.c test.c
CC = gcc
MUTILIB=./libmutils/libmutils.a
LIBS= $(MUTILIB) -lssl -lcrypto
INCLUDE= libmutils
CFLAGS= -DDEBUG -DHAS_SSL -g -I$(INCLUDE)
link:
gcc  $(CFLAGS) $(obj) -o sock_test $(LIBS)
clean:
rm sock_test
install:
echo "nothing to be done"

使用如下命令进行测试

./sock_test -f xxx@qq.com -t xxx@qq.com -s smtp.qq.com -p 465 -u xxx@qq.com -m xxx -z hello -x 123

测试结果如下

Debug>>>renyj_sock.c->turn_on_ssl()->line.239:connect ...
Debug>>>renyj_sock.c->turn_on_ssl()->line.247:connect end
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 220 smtp.qq.com Esmtp QQ Mail Server
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-smtp.qq.com
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-PIPELINING
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-SIZE 73400320
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-AUTH LOGIN PLAIN
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-AUTH=LOGIN
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250-MAILCOMPRESS
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250 8BITMIME
Debug>>>smtp.c->send_the_mail()->line.167:start AUTH
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 334 VXNlcm5hbWU6
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 334 UGFzc3dvcmQ6
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 235 Authentication successful
Debug>>>smtp.c->send_the_mail()->line.171:start FROM
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250 Ok
Debug>>>smtp.c->send_the_mail()->line.175:start TO
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250 Ok
Debug>>>smtp.c->send_the_mail()->line.179:start DATA
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 354 End data with <CR><LF>.<CR><LF>
Debug>>>smtp.c->send_the_mail()->line.193:start eom
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 250 Ok: queued as
Debug>>>smtp.c->send_the_mail()->line.197:QUIT
Debug>>>smtp.c->smtp_read_line()->line.14:[S] -----> 221 Bye

写在后面：

因为中间用了base64的编码，可以你们自己写，也可以用我这里的源码，我也是用的别人的。

请到这个地址下载：

http://download.csdn.net/detail/renyongjian1994/9906868

这里要多说一些，使用qq邮箱，有的人的密码是不能直接用的。需要对邮箱进行设定。进入qq邮箱的网页界面，点击设置，然后到如下位置设置，设置之后可以得到授权码，然后用授权码代替密码，应该就可以使用了。