Network Code Post: 302492741

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Top Forums Programming Network Code Post 302492741 by perleo on Tuesday 1st of February 2011 10:26:34 AM

02-01-2011

Registered User

Network Code

Hi,

This has been bugging me all day, I'm trying to get this code to send an ipv6 destination options header to any client that connects to it. I keep getting "Error returned from sendmsg" which is my error checking on the sendmsg function but I don't know why. Any Ideas?

Code:

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <netdb.h>

#include <netinet/ip6.h>

int 
main()
{
  struct sockaddr_in6 sin6, sin6_accept;
  socklen_t sin6_len;
  int s0, s;
  int on;
  char hbuf[NI_MAXHOST];
  
  //ext header
  int rv;
  struct msghdr msg;
  struct cmsghdr *cmsg;
  int cmsglen = 0;
  
  char tstmsg[13] = "Hello World";
  
  struct iovec vec;
  
  struct ip6_dest dest;
  
  memset(&sin6, 0, sizeof(sin6));
  sin6.sin6_family = AF_INET6;
  sin6.sin6_len = sizeof(sin6);
  sin6.sin6_port = htons(5001);
  
  s0 = socket(AF_INET6, SOCK_STREAM, IPPROTO_TCP);
  on = 1;
  
  //setsockopt(s0, SOL_SOCKET, SO_RESUEADDR, &on, sizeof(on));
  
  setsockopt(s0, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
  
  bind(s0, (const struct sockaddr *)&sin6, sizeof(sin6));
  listen(s0, 1);
  while(1) {
            sin6_len = sizeof(sin6_accept);
            s = accept(s0, (struct sockaddr *)&sin6_accept, &sin6_len);
            getnameinfo((struct sockaddr *)&sin6_accept, sin6_len,
                          hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST);            
            printf("accept a connection from %s\n", hbuf);
            
            
            memset(&dest, 0, sizeof(dest));
            
            /* Ancilliary Data  */
            msg.msg_name = &sin6;
            msg.msg_namelen = sizeof(sin6);
            
            msg.msg_iov = &vec;
            msg.msg_iovlen = 1;
            msg.msg_iov->iov_base = tstmsg;
            msg.msg_iov->iov_len = 13;
            
            
            cmsglen = CMSG_SPACE(sizeof(dest));
            
            cmsg = malloc(cmsglen);
            
            if(cmsg == NULL) {
              puts("cmsg malloc failed");
              exit(1);
            }          
            
            msg.msg_control = cmsg;
            msg.msg_controllen = cmsglen;
            
            cmsg = CMSG_FIRSTHDR(&msg);                        
            cmsg->cmsg_level = IPPROTO_IPV6;
            cmsg->cmsg_type = IPV6_DSTOPTS;
            cmsg->cmsg_len = CMSG_LEN(sizeof(dest));
            memcpy(CMSG_DATA(cmsg), &dest, sizeof(dest));
            
            setsockopt(s0, IPPROTO_IPV6, IPV6_DSTOPTS, &on, sizeof(int)); 
            
            //send message back
            rv = sendmsg( s0 , &msg, 0);          
              if(rv == -1)
               {
                 puts("Error returned from sendmsg");
               }
           }
    exit(0);
}

perleo

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anyevent::xmpp::error::muc

AnyEvent::XMPP::Error::MUC(3pm) 			User Contributed Perl Documentation			   AnyEvent::XMPP::Error::MUC(3pm)

NAME

       AnyEvent::XMPP::Error::MUC - MUC error

       Subclass of AnyEvent::XMPP::Error

   METHODS
       type
	   This method returns either:

	   join_timeout
	       If the joining of the room took too long.

	   no_config_form
	       If the room we requested the configuration from didn't provide a data form.

	   subject_change_forbidden
	       If changing the subject of a room is not allowed.

	   message_error
	       If this is an unidentified message error.

	   If we got a presence error the method "presence_error" returns a AnyEvent::XMPP::Error::Presence object with further details. However,
	   this class tries to provide a mapping for you (the developer) to ease the load of figuring out which error means what. To make
	   identification of the errors with XEP-0045 more clear I included the error codes and condition names.

	   Here are the more descriptive types:

	   password_required
	       Entering a room Inform user that a password is required.

	       (Condition: not-authorized, Code: 401)

	   banned
	       Entering a room Inform user that he or she is banned from the room

	       (Condition: forbidden, Code: 403)

	   room_locked
	       Entering a room Inform user that the room does not exist and someone is currently creating it.

	       (Condition: item-not-found, Code: 404)

	   room_not_creatable
	       Entering a room Inform user that room creation is restricted

	       (Condition: not-allowed, Code: 405)

	   use_reserved_nick
	       Entering a room Inform user that the reserved roomnick must be used

	       (Condition: not-acceptable, Code: 406)

	   not_on_memberlist
	       Entering a room Inform user that he or she is not on the member list

	       (Condition: registration-required, Code: 407)

	   nickname_in_use
	       Entering a room Inform user that his or her desired room nickname is in use or registered by another user

	       (Condition: conflict, Code: 409)

	   room_full
	       Entering a room Inform user that the maximum number of users has been reached

	       (Condition: service-unavailable, Code: 503)

	   The condition and code are also available through the AnyEvent::XMPP::Error::Presence object returned by "presence_error", see below.

       text
	   This method returns a human readable text if one is available.

       presence_error
	   Returns a AnyEvent::XMPP::Error::Presence object if this error origins to such an error and not some internal error.

       message_error
	   Returns a AnyEvent::XMPP::Error::Message object if this error origins to such an error and not some internal error.

AUTHOR

       Robin Redeker, "<elmex at ta-sa.org>", JID: "<elmex at jabber.org>"

COPYRIGHT &; LICENSE
       Copyright 2007, 2008 Robin Redeker, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-01-23					   AnyEvent::XMPP::Error::MUC(3pm)