[sr-dev] Big TCP message
Klaus Darilion
klaus.mailinglists at pernau.at
Thu Jan 3 15:11:18 CET 2013
How much traffic do you want to send?
When does the problem happen? At which message size does it happen?
I just wonder that the normal options which works for us do not work for
you and t
regards
Klaus
On 03.01.2013 14:21, Amit Elbaz wrote:
> I increased tcp_rd_buf_size, but it did not help.
> I don't think this is the problem.
>
> In tcp_read.c:
> int tcp_read(struct tcp_connection *c, int* flags)
> {
> int bytes_free, bytes_read;
> struct tcp_req *r;
> int fd;
>
> r=&c->req;
> fd=c->fd;
> bytes_free=r->b_size- (int)(r->pos - r->buf);
> if (unlikely(bytes_free==0)){
> LOG(L_ERR, "ERROR: tcp_read: buffer overrun, dropping\n");
> r->error=TCP_REQ_OVERRUN;
> return -1;
> }
>
> how to i increase r->b_size ?
>
> Thanks for you help, Amit.
>
> On Wed, Jan 2, 2013 at 6:51 PM, Klaus Darilion
> <klaus.mailinglists at pernau.at <mailto:klaus.mailinglists at pernau.at>> wrote:
>
> Hi!
>
> -b is the receive buffer of the socket in the OS (for UDP tweaking,
> I do not know if this is relevant for TCP), so not related to this
> problem as this problem happens inside Kamailio.
>
> Actually 15K is rather small, really strange that you get errors.
> So, I did some tests:
>
> 1. tcp_rd_buf_size must be increased. The documentation is bad as it
> meantions "TCP datagram" but actually means the maximum size of SIP
> (or HTTP) message that can be received.
>
> 2. tcp_rd_buf_size is internally limited to 16MBytes. If you need
> more, you have to change the code in:
> tcp_options.c: { "rd_buf_size", CFG_VAR_INT | CFG_ATOMIC, 512,
> 16777216, 0, 0,
>
> 3. If you use real large message you may need to increase the
> private memory, and if you forward it with tm module, also the
> shared memory.
>
> regards
> Klaus
>
>
> Am 02.01.2013 13:59, schrieb Amit Elbaz:
>> this still does not solve the problem.
>> I've also tried running Kamailio with *-b 32768* option.
>>
>> here are the logs:
>>
>> Jan 2 14:54:24 debdev kamailio[2580 <tel:%5B2580>]: ERROR: <core>
>> [tcp_read.c:344]: ERROR: tcp_read: buffer overrun, dropping
>> Jan 2 14:54:24 debdev kamailio[2580 <tel:%5B2580>]: ERROR: <core>
>> [tcp_read.c:1127]: ERROR: tcp_read_req: error reading
>>
>> Thanks for your help.
>>
>> On Wed, Jan 2, 2013 <tel:2013> at 1:17 PM, Andrew Pogrebennyk
>> <apogrebennyk at sipwise.com <mailto:apogrebennyk at sipwise.com>> wrote:
>>
>> Hi,
>> you may try changing the tcp_rd_buf_size and tcp_conn_wq_max:
>> http://www.kamailio.org/wiki/cookbooks/3.3.x/core#tcp_conn_wq_max
>>
>> And since this in development mailing list I'd like to point
>> at what
>> seem an iaccuracy in documentation: several options refer to
>> the core
>> parameter called tcp_write_buf, which isn't described in the
>> cookbook:
>>
>> tcp_conn_wq_max
>> Maximum bytes queued for write allowed per connection.
>> Attempting to
>> queue more bytes would result in an error and in the
>> connection being
>> closed (too slow). If *tcp_write_buf* is not enabled, it has
>> no effect.
>>
>> I hope Daniel or someone who knows reads this..
>>
>> BR,
>> Andrew
>>
>> On 01/02/2013 10:38 AM, Amit Elbaz wrote:
>> > Hi,
>> >
>> > While sending a big TCP SIP message (15K+), I get "tcp_read:
>> buffer
>> > overrun, dropping" message.
>> > this happens after a few fragments have been sent, and then
>> i get this
>> > message and the connection resets.
>> > is it possible to set the max-buffer size through
>> configuration? if so,
>> > where?
>> >
>> > Thanks, Amit.
>> >
>> >
>> > _______________________________________________
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>> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>> >
>>
>>
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