SCTP Programmer's Guide

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <unistd.h>
#include <netinet/sctp.h>
#include <sys/uio.h>
#define BUFLEN 100
int debug=0;
static void
handle_event(void *buf)
{
struct sctp_assoc_change *sac;
struct sctp_send_failed *ssf;
struct sctp_paddr_change *spc;
struct sctp_remote_error *sre;
union sctp_notification *snp;
char addrbuf[INET6_ADDRSTRLEN];
const char *ap;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
snp = buf;
switch (snp->sn_header.sn_type) {
case SCTP_ASSOC_CHANGE:
sac = &snp->sn_assoc_change;
printf("^^^ assoc_change: state=%hu, error=%hu, instr=%hu "
"outstr=%hu\n", sac->sac_state, sac->sac_error,
sac->sac_inbound_streams, sac->sac_outbound_streams);
break;
case SCTP_SEND_FAILED:
ssf = &snp->sn_send_failed;
printf("^^^ sendfailed: len=%hu err=%d\n", ssf->ssf_length,
ssf->ssf_error);
break;
case SCTP_PEER_ADDR_CHANGE:
spc = &snp->sn_paddr_change;
if (spc->spc_aaddr.ss_family == AF_INET) {
sin = (struct sockaddr_in *)&spc->spc_aaddr;
ap = inet_ntop(AF_INET, &sin->sin_addr,
addrbuf, INET6_ADDRSTRLEN);
} else {
sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
ap = inet_ntop(AF_INET6, &sin6>sin6_addr,
addrbuf, INET6_ADDRSTRLEN);
}
printf("^^^ intf_change: %s state=%d, error=%d\n", ap,
spc->spc_state, spc->spc_error);
break;
case SCTP_REMOTE_ERROR:
sre = &snp->sn_remote_error;
printf("^^^ remote_error: err=%hu len=%hu\n",
ntohs(sre->sre_error), ntohs(sre->sre_length));
break;
case SCTP_SHUTDOWN_EVENT:
78 SCTP Sample Programs