SMTP和POP3 SSL連接

Question

我正在使用用於SMTP的libetpan-1.0開源（郵件庫內容）&以「C」語言訪問POP3。我在SMTP & POP3中遇到SSL連接問題。當我使SSL連接&連接失敗時，我的套接字保持CLOSE_WAIT狀態。這會在很長時間後導致內存泄漏。這是我輸出的命令「netstat -an」。我在ARM板上運行這個應用程序。誰能告訴我，我該怎麼辦？提前致謝。

Here is my code that i am trying. 
pSmtp = mailsmtp_new(0, NULL); (Create new object) 
if (SMTP_NO_ERROR != mailsmtp_ssl_connect(pSmtp, "smtp.gmail.com", 465)) 
{ 
    mailsmtp_free(pSmtp); 
} 
else 
{ 
    // Send Mail 
} 
So doesn't my work is over after i call function "mailsmtp_free(pSmtp)" or 
i have do other stuff to close connection. 


    ~#netstat -an 
Active Internet connections (servers and established) 
Proto Recv-Q Send-Q Local Address   Foreign Address   State  
tcp  0  0 0.0.0.0:80    0.0.0.0:*    LISTEN  
tcp  0  0 0.0.0.0:21    0.0.0.0:*    LISTEN  
tcp  0  0 0.0.0.0:23    0.0.0.0:*    LISTEN  
tcp  1  0 192.168.51.151:4928  98.139.211.125:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4934  98.139.211.125:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2883  98.139.211.125:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4139  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4140  98.138.105.21:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.151.101:2745 TIME_WAIT 
tcp  1  0 192.168.51.151:4142  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4143  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3132  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3133  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3134  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3135  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3131  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2115  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3136  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:3137  98.138.105.21:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.151.101:2761 TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.151.101:2757 TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.151.101:2753 TIME_WAIT 
tcp  1  0 192.168.51.151:4083  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4082  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4081  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4080  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4085  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4084  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4075  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4074  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4073  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4072  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4079  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4078  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4077  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4076  63.250.193.228:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2493  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2492  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2495  98.138.105.21:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2496  98.138.105.21:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52577  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52581  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52585  TIME_WAIT  
tcp  0  0 192.168.51.151:80  192.168.51.40:52565  TIME_WAIT 
tcp  1  0 192.168.51.151:3978  63.250.193.228:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52569  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52573  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52609  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.151.101:2748 TIME_WAIT 
tcp  1  0 192.168.51.151:2743  98.139.211.125:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2742  98.139.211.125:465  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2744  98.139.211.125:465  CLOSE_WAIT 
tcp  94  0 192.168.51.151:3650  74.125.129.108:587  CLOSE_WAIT 
tcp  95  0 192.168.51.151:3655  74.125.129.108:587  CLOSE_WAIT 
tcp  1  0 192.168.51.151:2250  63.250.193.228:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52578  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52582  TIME_WAIT 
tcp  95  0 192.168.51.151:4618  74.125.129.108:587  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52586  TIME_WAIT 
tcp  95  0 192.168.51.151:4615  74.125.129.108:587  CLOSE_WAIT 
tcp  1  0 192.168.51.151:4353  98.139.211.125:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52590  TIME_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52594  TIME_WAIT 
tcp  1  0 192.168.51.151:2769  98.138.105.21:465  CLOSE_WAIT 
tcp  0  0 192.168.51.151:80  192.168.51.40:52598  TIME_WAIT 
udp  0  0 0.0.0.0:2048   0.0.0.0:*       
udp  0  0 0.0.0.0:2049   0.0.0.0:*       
Active UNIX domain sockets (servers and established) 
Proto RefCnt Flags  Type  State   I-Node Path 
unix 6  [ ]   DGRAM     1262 /dev/log 
unix 2  [ ]   DGRAM     1993 
unix 2  [ ]   DGRAM     1513 
unix 2  [ ]   DGRAM     1511 
unix 2  [ ]   DGRAM     1492 

Answer 1

您需要將它們關閉在您身邊。

CLOSE_WAIT表示遠程端已關閉連接，但您的端沒有。

見接受的答案here