Click here to Skip to main content
Click here to Skip to main content

Tagged as

How to set a socket connection timeout

, 16 Mar 2011 CPOL
Rate this:
Please Sign up or sign in to vote.
Resolve long timeout when connection target is unavailable
Sometimes, the connect time-out can take too much time when the target is unavailable. To resolve this issue, we can use non-blocking socket mode to select the timeout.
 
bool connect(char *host,int port, int timeout)
{
    TIMEVAL Timeout;
    Timeout.tv_sec = timeout;
    Timeout.tv_usec = 0;
    struct sockaddr_in address;  /* the libc network address data structure */   
 
    sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 
    address.sin_addr.s_addr = inet_addr(host); /* assign the address */
    address.sin_port = htons(port);            /* translate int2port num */	
    address.sin_family = AF_INET;
 
    //set the socket in non-blocking
    unsigned long iMode = 1;
    int iResult = ioctlsocket(sock, FIONBIO, &iMode);
    if (iResult != NO_ERROR)
    {	
        printf("ioctlsocket failed with error: %ld\n", iResult);
    }
	    
    if(connect(sock,(struct sockaddr *)&address,sizeof(address))==false)
    {	
        return false;
    }	
 
    // restart the socket mode
    iMode = 0;
    iResult = ioctlsocket(sock, FIONBIO, &iMode);
    if (iResult != NO_ERROR)
    {	
        printf("ioctlsocket failed with error: %ld\n", iResult);
    }
 
    fd_set Write, Err;
    FD_ZERO(&Write);
    FD_ZERO(&Err);
    FD_SET(sock, &Write);
    FD_SET(sock, &Err);
 
    // check if the socket is ready
    select(0,NULL,&Write,&Err,&Timeout);			
    if(FD_ISSET(sock, &Write)) 
    {	
        return true;
    }
 
    return false;
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

falvarezcp2008
Software Developer (Senior) Inicia Soluciones de Voz S.L.
Spain Spain
No Biography provided

Comments and Discussions

 
QuestionModify the timeout Pinmemberhoangsonk493-Oct-13 23:23 
AnswerRe: Modify the timeout Pinmemberfalvarezcp200822-Apr-14 23:51 
GeneralMy vote of 5 Pinmemberdjhellita17-Oct-12 4:33 
GeneralMy vote of 5 Pinmemberjiacode19-Aug-12 3:27 
GeneralMy vote of 5 Pinmemberpasztorpisti26-Jul-12 10:04 
GeneralMy vote of 5 PinmemberKai051725-Jul-12 20:42 
GeneralReason for my vote of 5 that's what i need. PinmemberHappyProgrammerSjy6-Aug-11 23:05 
GeneralReason for my vote of 4 It's useful,but I like Boost! PinmemberA.doo23-Mar-11 3:14 
GeneralReason for my vote of 5 just i need it Pinmemberi4cll18-Mar-11 22:47 
GeneralReason for my vote of 5 I think that it's useful. Pinmembervietean15-Mar-11 16:17 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.141029.1 | Last Updated 16 Mar 2011
Article Copyright 2011 by falvarezcp2008
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid