И еще немножечко sctp

//server
#include "ace/SOCK_SEQPACK_Acceptor.h"
#include "ace/IPC_SAP.h"
#include "ace/SOCK.h"
#include <netinet/sctp.h>
#include <string.h>

#define PORT_NUM 5002

int main (int argc, char **argv)
{
  ACE_SOCK_SEQPACK_Acceptor AcceptorSocket;
  ACE_SOCK_SEQPACK_Association Stream;
  
  pid_t childpid;
  
  int count = 0;
  int len = 0;
  char buf[BUFSIZ];
  
  const char *primary_addr = "192.168.1.2";
  const char *secondary_host_names[] = {"192.168.1.3"};
//задаем адреса сервера   
  ACE_Multihomed_INET_Addr ServerAddr (PORT_NUM, 
				       primary_addr, 
				       1, 
				       AF_INET,
				       secondary_host_names,
				       1
				      );
//открытие сокета
  if (-1 == AcceptorSocket.open (ServerAddr, 1))
    {
      perror("acceptor open ");
      return 1;
    }
//устанавливаем таймеры    
    sctp_paddrparams sctp_parm;

    sctp_parm.spp_pathmaxrxt=3;
    sctp_parm.spp_hbinterval =200;
    len = sizeof(struct sctp_paddrparams);
    AcceptorSocket.set_option(IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS, &sctp_parm,len);

    sctp_rtoinfo rto;
    rto.srto_min=500;
    rto.srto_max=1500;
 
    len = sizeof(struct sctp_rtoinfo);
    AcceptorSocket.set_option(IPPROTO_SCTP, SCTP_RTOINFO, &rto,len);
//цикл приема сообщений
  for(;;)
  { 
    printf("...waiting for client...\n");
    if (-1 == AcceptorSocket.accept(Stream))
    {
      perror("accept error ");
      return 1;
    }
    Stream.enable(ACE_NONBLOCK);
    printf("...client connected...\n");
  
    count=0;    
    for (ssize_t n; (n = Stream.recv_n(buf,sizeof buf)) > 0; )  
    {
      sleep(1);
      printf("client:%d - %s",count++,buf); 
      strcpy(buf,"pong\n");
      Stream.send_n(buf, sizeof(buf));

    }
    Stream.close();
  }
  
  if (-1 == AcceptorSocket.close ()) 
  {
    perror("acceptor close error ");
    return 1;
  }
  return 0;  
}

//client
#include "ace/OS_NS_unistd.h"
#include "ace/SOCK_SEQPACK_Connector.h"
#include <string.h>
#include <netinet/sctp.h>

#define PORT_NUM 5002

int main(int argc, char **argv)
{
  ACE_SOCK_SEQPACK_Connector Connector;
  ACE_SOCK_SEQPACK_Association Stream;
  
  char buf[BUFSIZ];
  int count=0;
  
  const char *primary_addr = "192.168.1.2";
  const char *secondary_host_names[1] = {"192.168.1.3"};
//указываем адрес сервера
  ACE_Multihomed_INET_Addr ServerAddr (
				       PORT_NUM, 
				       primary_addr,
				       1, 
				       AF_INET,
				       secondary_host_names,
				       0
					);
//соединение с сервером
  if (-1 == Connector.connect (Stream,
				ServerAddr,
                               NULL,
                               ACE_Addr::sap_any,
                               1))
  {
    perror("connector.connect error ");
    return 1;
  }
//установка таймеров
  sctp_paddrparams sctp_parm;
  sctp_parm.spp_pathmaxrxt=3;
  sctp_parm.spp_hbinterval =200;
  int len = sizeof(struct sctp_paddrparams);
  Stream.set_option(IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS, &sctp_parm,len);
 
  sctp_rtoinfo rto;
  rto.srto_min=500;
  rto.srto_max=1500;
  len = sizeof(struct sctp_rtoinfo);
  Stream.set_option(IPPROTO_SCTP, SCTP_RTOINFO, &rto,len);
  
  while(1)
  {
//посылаем сообщение
    strcpy(buf,"ping\n");
    Stream.send_n( &buf, sizeof(buf) );
    Stream.recv(&buf,sizeof buf);
    sleep(1);
    printf("%d:%s",count++,buf);
  }
  return Stream.close();
}

ifconfig:
eth0:2    Link encap:Ethernet  HWaddr 00:1d:92:08:bd:0e  
          inet addr:192.168.1.2  Bcast:192.168.1.63  Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

eth0:3    Link encap:Ethernet  HWaddr 00:1d:92:08:bd:0e  
          inet addr:192.168.1.3  Bcast:192.168.1.3  Mask:255.255.255.252
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1