Hi Ricardo,
You might want to take a closer look here
http://noxrepo.org/~yapkke/doc/classvigil_1_1messenger.html
http://noxrepo.org/~yapkke/doc/structvigil_1_1messenger__msg.html
The struct messenger_msg is defined in messenger.hh as (and not what
you presented in the email).
struct messenger_msg
{
/** Length of message, including this header.
*/
uint16_t length;
/** Type of message, as defined in \ref msg_type.
*/
uint8_t type;
/** Reference to body of message.
*/
uint8_t body[0];
} __attribute__ ((packed));
Your packet length does seems way off to me at 512. The packet sent
is not conforming to the expectation.
Hope this helps.
Regards
KK
On 25 June 2011 13:26, Ricardo Bennesby <ricardo.benne...@gmail.com> wrote:
> Hi. Thanks for reply, KK.
>
> I am using the struct messenger_msg of messenger component:
>
> struct messenger_msg
> {
> uint16_t length;
> uint8_t type;
> string body;
> } __attribute__ ((packed));
>
> So, I declare and set the fields in my component:
>
> messenger_msg mymsg;
> mymsg.type = 0x0A;
> mymsg.body.append("Test");
> mymsg.length = (sizeof(messenger_msg));
>
> And the other part of the client (using socket):
>
> int Mysocket, numbytes;
> char buf[MAXDATASIZE];
> struct hostent *he;
> struct sockaddr_in seu_endereco;
>
> if ((he=gethostbyname("localhost")) == NULL) /* send host info */
> {
> herror("gethostbyname");
> exit(1);
> }
>
> seu_endereco.sin_family = AF_INET;
> seu_endereco.sin_port = htons(PORTA);
> seu_endereco.sin_addr = *((struct in_addr *)he->h_addr);
> bzero(&(seu_endereco.sin_zero), 8);
>
> if (send(Mysocket, &mymsg, mymsg.length, 0) == -1) {
> perror("send");
> close(Mysocket);
> exit(0);
> }
>
> Where PORTA==2603;
>
> But when I run it, the server client (messenger) prints:
>
> 00077|messenger_core|DBG:Copy 8 bytes to message
> 00078|messenger|DBG:Check message completeness 512 (expected 512)
> 00079|messenger_core|DBG:Received packet of length 512
> 00080|messenger|DBG:Message posted as Msg_event
> 00081|messenger|DBG:Received packet of length 512
> 00082|messenger_core|DBG:Copy 2 bytes to message
> 00083|messenger|DBG:Check message completeness 2 (expected 62559)
> 00084|messenger_core|DBG:Copy 502 bytes to message
> 00085|messenger|DBG:Check message completeness 504 (expected 62559)
> 00086|messenger|DBG:me.msg->length: 512 and sizeof(messenger_msg)+1: 9
> 00087|messenger|DBG:Received string ��Q�
>
> The string "Test" is not printed. It shows ��Q� instead. What am I doing
> wrong? Is it the length of the message that I am setting doing mymsg.length
> = (sizeof(messenger_msg)); ? Or in the way I am using socket send function
> in client (send(Mysocket, &mymsg, mymsg.length, 0)) ?
>
> Thanks for help.
>
> Best Regards.
>
> 2011/6/18 kk yap <yap...@stanford.edu>
>>
>> Hi Ricardo,
>>
>> You might want to add a length and type in front of the string. :)
>>
>> Regards
>> KK
>>
>> On 18 June 2011 14:46, Ricardo Bennesby <ricardo.benne...@gmail.com>
>> wrote:
>> > Hi.
>> >
>> > I am writing component in C++ that uses messenger component.
>> >
>> > I have a client function that send a string to the own component. As
>> > follows:
>> >
>> > void comp::sendMessageOtherAs(){
>> > ClientSocket theSocket ("localhost", 2603 );
>> > string request;
>> > request = "Test";
>> > theSocket << request << "\n";
>> > lg.dbg("Echo sent");
>> > }
>> >
>> > The server part is did by messenger component, calling the
>> > handle_message
>> > function;
>> >
>> > But the result, when the handle_message is invoked is:
>> >
>> > 00108|messenger_core|DBG:Starting connection with idleInterval 0
>> > 00109|messenger_core|DBG:Received packet of length 0
>> > 00110|messenger|DBG:Message posted as Msg_event
>> > 00111|messenger_core|DBG:TCP socket connection accepted
>> > 00112|messenger_core|DBG:Copy 2 bytes to message
>> > 00113|messenger|DBG:Check message completeness 2 (expected 21349)
>> > 00114|messenger_core|DBG:Copy 31 bytes to message
>> > 00115|messenger|DBG:Check message completeness 33 (expected 21349)
>> > 00116|messenger_core|DBG:Received packet of length 3
>> > 00117|messenger_core|DBG:Received disconnection request
>> > 00118|messenger|DBG:Message posted as Msg_event
>> > 00119|messenger_core|DBG:socket closed
>> >
>> > And the handler messenger has the code:
>> >
>> > switch (me.msg->type)
>> > {
>> > case MSG_DISCONNECT:
>> > return STOP;
>> > break;
>> > case MSG_ECHO:
>> > VLOG_DBG(lg, "Got echo request");
>> > reply_echo(me);
>> > return STOP;
>> > break;
>> > case MSG_ECHO_RESPONSE:
>> > VLOG_DBG(lg, "Echo reply received");
>> > return STOP;
>> > break;
>> > case MSG_NOX_STR_CMD:
>> > char mstring[ntohs(me.msg->length)-sizeof(messenger_msg)+1];
>> > memcpy(mstring, me.msg->body,
>> > ntohs(me.msg->length)-sizeof(messenger_msg));
>> > mstring[ntohs(me.msg->length)-sizeof(messenger_msg)] = '\0';
>> > VLOG_DBG(lg, "Received string %s", mstring);
>> > break;
>> > }
>> >
>> > Shouldn't the message be of MSG_NOX_STR_CMD type and prints the string
>> > sent?
>> > Or the way I am sending the string is wrong?
>> >
>> > Sorry if I did'n made me clear.
>> > Thanks for help.
>> > Regards.
>> >
>> > --
>> > Ricardo Bennesby da Silva
>> > Ciência da Computação - UFAM
>> > LabCIA - Laboratório de Computação Inteligente e Autônoma
>> >
>> >
>> > _______________________________________________
>> > nox-dev mailing list
>> > nox-dev@noxrepo.org
>> > http://noxrepo.org/mailman/listinfo/nox-dev
>> >
>> >
>
>
>
> --
> Ricardo Bennesby da Silva
> Ciência da Computação - UFAM
> LabCIA - Laboratório de Computação Inteligente e Autônoma
>
>
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