Re: Multiple connection from 1 client
On 5/9/2011 1:45 PM, Eric S. Eberhard wrote: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } This code is ancient and is in desperate need of being made to conform to modern standards before being used. DS __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Multiple connection from 1 client
Hi Eric., First of all i am a she :) and I took a maternity break off from work..which is why I am jobless..but busy feeding and diapering my little one :)..sure I can take up your offer, please email me at suraj...@gmail.com. harsh., The thing is as Eric says, you really have to rewrite ur server code once you make the fd non blocking..a simple fcntl is enuf. Also I would personally prefer sys poll over select on Linux..u could research about the former. Select is boring to me. the whole idea of non blocking is that a single call to ssl accept is not going to finish the complete ssl handshake. If you read the rfc you will know the multiple messages that are exchanged for a single ssl handshake, so in-between every read and write for the ssl handshake the non blocking fd would actually give you time to do something else . So what you really need is a state machine, which is noting but a array of function pointers (2d) in this case. I would write something like this States: ssl accept pending, ssl accepted, ssl read blocked on write, ssl read, ssl write blocked on read, ssl write, ssl renegotiate Have a function for each state specified above which would do ssl_accept, ssl_read, ssl_write and so on. Thanks --Gayathri On Monday, May 9, 2011, Eric S. Eberhard fl...@vicsmba.com wrote: Harsh, I would take up his offer of help. Socket control over multiple sockets is tricky code and very specific to what you are trying to do. My environment is single threaded and does similar things to yours -- but as Gayathri said, there are many details and exceptions and although with some online help or books I am sure with enough time you could do it (took me forever the first time) I suspect that this offer is as good as they get. I am not jobless (lucky me) so I can't put in the time he can. Gayathri -- would you be interested in pure C coding on a contract basis (intermittent, not really a job, more like occasional tasks) -- the code we write runs on AIX, Linux, OS/X, SCO, HP/UX, Centos, etc. so it is a little tricky to make work. If you have interest let me know your rates and real email and so forth. Thanks, Eric At 08:33 PM 5/6/2011, you wrote: Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode); /* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the
Re: Multiple connection from 1 client
Hi Gayathri, My Server and Client application are Windows based. Also the application is huge, so its not possible to rewrite at this time. Maybe later we can do that, but as for now, we are looking into alternate method for this. If we decide to revisit this issue then i will look into this. Thanks. // Harshvir On Mon, May 9, 2011 at 6:57 PM, Gayathri Sundar suraj...@gmail.com wrote: Hi Eric., First of all i am a she :) and I took a maternity break off from work..which is why I am jobless..but busy feeding and diapering my little one :)..sure I can take up your offer, please email me at suraj...@gmail.com. harsh., The thing is as Eric says, you really have to rewrite ur server code once you make the fd non blocking..a simple fcntl is enuf. Also I would personally prefer sys poll over select on Linux..u could research about the former. Select is boring to me. the whole idea of non blocking is that a single call to ssl accept is not going to finish the complete ssl handshake. If you read the rfc you will know the multiple messages that are exchanged for a single ssl handshake, so in-between every read and write for the ssl handshake the non blocking fd would actually give you time to do something else . So what you really need is a state machine, which is noting but a array of function pointers (2d) in this case. I would write something like this States: ssl accept pending, ssl accepted, ssl read blocked on write, ssl read, ssl write blocked on read, ssl write, ssl renegotiate Have a function for each state specified above which would do ssl_accept, ssl_read, ssl_write and so on. Thanks --Gayathri On Monday, May 9, 2011, Eric S. Eberhard fl...@vicsmba.com wrote: Harsh, I would take up his offer of help. Socket control over multiple sockets is tricky code and very specific to what you are trying to do. My environment is single threaded and does similar things to yours -- but as Gayathri said, there are many details and exceptions and although with some online help or books I am sure with enough time you could do it (took me forever the first time) I suspect that this offer is as good as they get. I am not jobless (lucky me) so I can't put in the time he can. Gayathri -- would you be interested in pure C coding on a contract basis (intermittent, not really a job, more like occasional tasks) -- the code we write runs on AIX, Linux, OS/X, SCO, HP/UX, Centos, etc. so it is a little tricky to make work. If you have interest let me know your rates and real email and so forth. Thanks, Eric At 08:33 PM 5/6/2011, you wrote: Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode);/* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto: suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto: hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from
Re: Multiple connection from 1 client
Hi, I used the following code to change the socket to non blocking, but its still not successful, now its not even able to complete SSL_Accept. I am changing the socket option for the accepted socket. unsigned long iMode = 1; int nReturn = ioctlsocket(sock, FIONBIO, iMode); if(nReturn != NO_ERROR) { printf((ioctlsocket failed with error: %ld\n, nReturn)); } Also i suspect, that if i change the socket to non blocking, then my current read write code will not work. i mean the one in which i use FD_SET and select to perform operations. Thanks. // Harshvir On Fri, May 6, 2011 at 10:33 PM, Gayathri Sundar suraj...@gmail.com wrote: Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode);/* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto: suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto: hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto: suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto: hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org
Re: Multiple connection from 1 client
Hi., Yes, once you make the socket noblocking, your current ssl API,s will not work. that is why I asked you to write the asynchronous state machine. Go thro the man pages for ssl accept, ssl read, ssl write for non blocking cases. You need to handle special cases called want read and write errors. I will send a detailed email a little later. Thanks --Gayathri On Monday, May 9, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Hi, I used the following code to change the socket to non blocking, but its still not successful, now its not even able to complete SSL_Accept. I am changing the socket option for the accepted socket. unsigned long iMode = 1; int nReturn = ioctlsocket(sock, FIONBIO, iMode); if(nReturn != NO_ERROR) { printf((ioctlsocket failed with error: %ld\n, nReturn)); } Also i suspect, that if i change the socket to non blocking, then my current read write code will not work. i mean the one in which i use FD_SET and select to perform operations. Thanks. // Harshvir On Fri, May 6, 2011 at 10:33 PM, Gayathri Sundar suraj...@gmail.com wrote: Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode); /* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7,
Re: Multiple connection from 1 client
On 5/9/2011 6:27 AM, Harshvir Sidhu wrote: Also i suspect, that if i change the socket to non blocking, then my current read write code will not work. i mean the one in which i use FD_SET and select to perform operations. Thanks. It's very easy to get things wrong and it won't work unless you get everything right. The most common mistake is refusing to call one of the SSL_* functions until you get a 'select' hit. You should only do that if OpenSSL specifically tells you to do that. The second most common mistake is assuming that an SSL connection has separate read and write readiness, like a TCP connection does. An SSL connection is a single state machine and so has only a single state. (So if SSL_Read returns WANT_READ and then you call SSL_Write, regardless of what return value you get, the WANT_READ from SSL_Read is invalidated because SSL_Write can change the state of the SSL connection.) DS __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Multiple connection from 1 client
Harsh, I would take up his offer of help. Socket control over multiple sockets is tricky code and very specific to what you are trying to do. My environment is single threaded and does similar things to yours -- but as Gayathri said, there are many details and exceptions and although with some online help or books I am sure with enough time you could do it (took me forever the first time) I suspect that this offer is as good as they get. I am not jobless (lucky me) so I can't put in the time he can. Gayathri -- would you be interested in pure C coding on a contract basis (intermittent, not really a job, more like occasional tasks) -- the code we write runs on AIX, Linux, OS/X, SCO, HP/UX, Centos, etc. so it is a little tricky to make work. If you have interest let me know your rates and real email and so forth. Thanks, Eric At 08:33 PM 5/6/2011, you wrote: Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode);/* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. __ OpenSSL Project
Multiple connection from 1 client
Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir
Re: Multiple connection from 1 client
Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir Hi, Can you show us the source code. Paste it into pastebin.org. Regards
Re: Multiple connection from 1 client
My code is all jumbled up, its a big big code. I dont think i can share the code. If there is some particular call that you want to see, please let me know i will share the function call or block of calls. Thanks. On Fri, May 6, 2011 at 2:22 PM, derleader mail derlea...@abv.bg wrote: Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir Hi, Can you show us the source code. Paste it into pastebin.org. Regards
Re: Multiple connection from 1 client
On Fri May 6 2011, derleader mail wrote: Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir Hi, Can you show us the source code. Paste it into pastebin.org. Is there some reason you ask every poster on this mailing list for their source code? Mike Regards __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
RE: Multiple connection from 1 client
From: Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.comwrote: *From:* Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.comwrote: *From:* Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar suraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.comwrote: *From:* Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar suraj...@gmail.comwrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu hvssi...@gmail.comwrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.comwrote: *From:* Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
And I cannot imagine a case where a blocking FD is useful except it is lazier to code that way. You need to use non-blocking. E At 04:03 PM 5/6/2011, you wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell mailto:jfarr...@pillardata.comjfarr...@pillardata.com wrote: From: Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.htmlhttp://www.catb.org/~esr/faqs/smart-questions.html Eric S. Eberhard (928) 567-3727 Voice (928) 567-6122 Fax (928) 301-7537 Cell Vertical Integrated Computer Systems, LLC Metropolis Support, LLC For Metropolis support and VICS MBA Supporthttp://www.vicsmba.com Pictures of Snake in Spring http://www.facebook.com/album.php?aid=115547id=1409661701l=1c375e1f49 Pictures of Camp Verde http://www.facebook.com/album.php?aid=12771id=1409661701l=fc0e0a2bcf Pictures of Land Cruiser in Sedona http://www.facebook.com/album.php?aid=50953id=1409661701 Pictures of Flagstaff area near our cabin http://www.facebook.com/album.php?aid=12750id=1409661701 Pictures of Cheryl in a Horse Show http://www.facebook.com/album.php?aid=32484id=1409661701 Pictures of the AZ Desert http://www.facebook.com/album.php?aid=58827id=1409661701 (You can see why we love this state :-) ) __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Multiple connection from 1 client
Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar suraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar suraj...@gmail.comwrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu hvssi...@gmail.comwrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.com wrote: *From:* Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html
Re: Multiple connection from 1 client
Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode);/* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell mailto:jfarr...@pillardata.comjfarr...@pillardata.com wrote: From: Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.htmlhttp://www.catb.org/~esr/faqs/smart-questions.html Eric S. Eberhard (928) 567-3727 Voice (928) 567-6122 Fax (928) 301-7537 Cell Vertical Integrated Computer Systems, LLC Metropolis Support, LLC For Metropolis support and VICS MBA Supporthttp://www.vicsmba.com Pictures of Snake in Spring http://www.facebook.com/album.php?aid=115547id=1409661701l=1c375e1f49 Pictures of Camp Verde http://www.facebook.com/album.php?aid=12771id=1409661701l=fc0e0a2bcf Pictures of Land Cruiser in Sedona http://www.facebook.com/album.php?aid=50953id=1409661701 Pictures of
Re: Multiple connection from 1 client
Yes, you need to make the underlying socket non blocking, and at the same time gotta change the way you call SSL_accept, SSL_read, write etc to handle non block error conditions like want_read, want_write errors, use the code Eric has given to make the fd non block, or u can also set the bio non block by using FIONBIO option. basically you really need to write an asynchronous state machine. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks for the reply Gayathri.Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar suraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks--Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Gayatri,My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert.Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar suraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks--Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu hvssi...@gmail.com wrote: Well i think this link is for my question.I have already done 1-5 from the Before you ask list.Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell jfarr...@pillardata.com wrote: From: Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thoug __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Multiple connection from 1 client
Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode);/* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto: suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto: hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto: suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto: hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. On Fri, May 6, 2011 at 5:18 PM, Jeremy Farrell mailto: jfarr...@pillardata.comjfarr...@pillardata.com wrote: From: Harshvir Sidhu Hi, I have a server application, which accepts normal sockets and ssl socket connections. I am trying to make 3 connections to server from 1 client machine, on same server port. When i connect on normal sockets then it works with any number of connections. When i tried to connect SSL then they dont work. If i connect 1 client then it works. In my listen socket, I have SO_REUSEADDR socket option, at first i thought might be this is causing issue, but i tried to use SO_EXCLUSIVEADDRUSE even then it dont work. Has someone seen some issue like this, any possible suggestion for this? Thanks, // Harshvir http://www.catb.org/~esr/faqs/smart-questions.html http://www.catb.org/~esr/faqs/smart-questions.html Eric S. Eberhard (928) 567-3727 Voice (928) 567-6122 Fax (928) 301-7537 Cell Vertical Integrated Computer Systems, LLC Metropolis Support, LLC For Metropolis support and VICS MBA Supporthttp://www.vicsmba.com Pictures of Snake in Spring http://www.facebook.com/album.php?aid=115547id=1409661701l=1c375e1f49 Pictures of Camp Verde
Re: Multiple connection from 1 client
Harsh., If u have any specific doubts in writing this asynchronous state machine email me privately at suraj...@gmail.com. I am pretty much jobless right now and can spend some time on this. Thanks --Gayathri On Friday, May 6, 2011, Harshvir Sidhu hvssi...@gmail.com wrote: Thanks, I will give this a try. // Harshvir On Fri, May 6, 2011 at 6:44 PM, Eric S. Eberhard fl...@vicsmba.com wrote: Change the sockets. This is what I use: int setblock(fd, mode) int fd; int mode; /* True - blocking, False - non blocking */ { int flags; int prevmode; flags = fcntl(fd, F_GETFL, 0); prevmode = !(flags O_NDELAY); if (mode) flags = ~O_NDELAY; /* turn blocking on */ else flags |= O_NDELAY; /* turn blocking off */ fcntl(fd, F_SETFL, flags); return prevmode; } Since it returns the existing mode you can use as such: prevmode = setblock(fd,0) /* turn of blocking */ /* do your thing */ (void)setblock(fd,prevmode); /* restore to original condition */ At 04:15 PM 5/6/2011, you wrote: Thanks for the reply Gayathri. Do you mean to changing the sockets to non blocking, or when i create bio for ssl to make that as non blocking? Thanks. On Fri, May 6, 2011 at 6:03 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harsh, Okay from what I can understand, if you make ur underlying fd non blocking then it would work fine. Blocking FDs, unless and until one client is finished with its processing the other client will not be able to communicate with the server as the previous fd is blocked. The server is waiting on the 1st client to finish. When you have 3 ports and 3 clients then ofcourse it will work. thanks --Gayathri On Fri, May 6, 2011 at 5:50 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Gayatri, My server code is single threaded and i am using blocking sockets, i am using fd_set and select to wait for event on socket, and then performing operation based on the event that acts on a socket. I have an array of sockets to listen. So if i start listening on 3 different ports and from my client machien, i try to connect on them at different ports then it works fine, but when i use 1 listen port then it dont work properly. What i mean to say by work properly is that the connection is established, but when i am waiting for select to return event, then it dont show any activity when i send data from client, only 1 of them works, 2 dont work. In addition to that, when i use WireShark to see packets, then it shows that machine has received the packet from client. But server dont show that alert. Thats why i think it could be some socket option which is affecting it. // Harshvir On Fri, May 6, 2011 at 5:37 PM, Gayathri Sundar mailto:suraj...@gmail.comsuraj...@gmail.com wrote: Harshvir, SO_REUSEADDR sock option has noting to do with ur problem, please go thro the socket ops man page to get a better understanding. First find out if ur server code is a blocking i/o or non blocking I/O..if former then connections will be handled sequentially..only after the 1st client is finished will the server be able to respond to the 2nd connect request. If non blocking then there should be no problem. Check the code if you see and O_NONBLOCK flag set in some fcntl call or check for FIONBIO flag. Thanks --Gayathri On Fri, May 6, 2011 at 5:29 PM, Harshvir Sidhu mailto:hvssi...@gmail.comhvssi...@gmail.com wrote: Well i think this link is for my question. I have already done 1-5 from the Before you ask list. Number 6, i dont know anyone who use openssl. Number 7, it will take a lot of time to go through all the code, i was just trying to save some time. I thought user discussion forums are for this only. I apologize for my understanding. __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org