int
main(int argc, char **argv)
{
int sock_fd,msg_flags,connfd,childpid;
sctp_assoc_t assoc;
char readbuf[BUFFSIZE];
struct sockaddr_in servaddr, cliaddr;
struct sctp_sndrcvinfo sri;
struct sctp_event_subscribe evnts;
socklen_t len;
size_t rd_sz;
sock_fd = Socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERV_PORT);
Bind(sock_fd, (SA *) &servaddr, sizeof(servaddr));
bzero(&evnts, sizeof(evnts));
evnts.sctp_data_io_event = 1;
Setsockopt(sock_fd, IPPROTO_SCTP, SCTP_EVENTS,
&evnts, sizeof(evnts));
Listen(sock_fd, LISTENQ);
printf("Start waiting...\n");
/* include mod_servfork */
for ( ; ; ) {
len = sizeof(struct sockaddr_in);
rd_sz = Sctp_recvmsg(sock_fd, readbuf, sizeof(readbuf),
(SA *)&cliaddr, &len,
&sri,&msg_flags);
Sctp_sendmsg(sock_fd, readbuf, rd_sz,
(SA *)&cliaddr, len,
sri.sinfo_ppid,
sri.sinfo_flags,
sri.sinfo_stream,
0, 0);
assoc = sctp_address_to_associd(sock_fd,(SA *)&cliaddr,len);
if((int)assoc == 0){
err_ret("Can't get association id");
continue;
}
connfd = sctp_peeloff(sock_fd,assoc);
if(connfd == -1){
err_ret("sctp_peeloff fails");
continue;
}
if((childpid = fork()) == 0) {
Close(sock_fd);
str_echo(connfd);
exit(0);
} else {
Close(connfd);
}
}
/* end mod_servfork */
}
int sctp_get_no_strms(int sock_fd, struct sockaddr* to, socklen_t tolen) {
int ret_sz;
struct sctp_status status;
ret_sz = sizeof(status);
bzero(&status, sizeof(status));
status.sstat_assoc_id = sctp_address_to_associd(sock_fd, to, tolen);
getsockopt(sock_fd, IPPROTO_SCTP, SCTP_STATUS, &status, &ret_sz);
return(status.sstat_outstrms);
}
int
sctp_get_no_strms(int sock_fd,
struct sockaddr *to,
socklen_t tolen)
{
socklen_t retsz;
struct sctp_status status;
retsz = sizeof(status);
bzero(&status, sizeof(status));
//这句出问题.
//听说可以改成:tatus.sstat_assoc_id = sri.sinfo_assoc_id;
status.sstat_assoc_id = sctp_address_to_associd(sock_fd, to, tolen);
my_getsockopt(sock_fd, IPPROTO_SCTP, SCTP_STATUS, &status, &retsz);
return (status.sstat_outstrms);
}
