int
main(int argc, char **argv)
{
int sock_fd,msg_flags;
char readbuf[BUFFSIZE];
struct sockaddr_in servaddr, cliaddr;
struct sctp_sndrcvinfo sri;
struct sctp_event_subscribe evnts;
int stream_increment=1;
socklen_t len;
size_t rd_sz;
if (argc == 2)
stream_increment = atoi(argv[1]);
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));
/* include mod_serv06 */
bzero(&evnts, sizeof(evnts));
evnts.sctp_data_io_event = 1;
evnts.sctp_association_event = 1;
evnts.sctp_address_event = 1;
evnts.sctp_send_failure_event = 1;
evnts.sctp_peer_error_event = 1;
evnts.sctp_shutdown_event = 1;
evnts.sctp_partial_delivery_event = 1;
evnts.sctp_adaption_layer_event = 1;
Setsockopt(sock_fd, IPPROTO_SCTP, SCTP_EVENTS,
&evnts, sizeof(evnts));
Listen(sock_fd, LISTENQ);
for ( ; ; ) {
len = sizeof(struct sockaddr_in);
rd_sz = Sctp_recvmsg(sock_fd, readbuf, sizeof(readbuf),
(SA *)&cliaddr, &len,
&sri,&msg_flags);
if(msg_flags & MSG_NOTIFICATION) {
print_notification(readbuf);
continue;
}
/* end mod_serv06 */
if(stream_increment) {
sri.sinfo_stream++;
if(sri.sinfo_stream >= sctp_get_no_strms(sock_fd,(SA *)&cliaddr, len))
sri.sinfo_stream = 0;
}
Sctp_sendmsg(sock_fd, readbuf, rd_sz,
(SA *)&cliaddr, len,
sri.sinfo_ppid,
sri.sinfo_flags,
sri.sinfo_stream,
0, 0);
}
}
int
main(int argc, char **argv)
{
int sock_fd,msg_flags;
char readbuf[BUFFSIZE];
struct sockaddr_in servaddr, cliaddr;
struct sctp_sndrcvinfo sri;
struct sctp_event_subscribe evnts;
int stream_increment=1;
socklen_t len;
size_t rd_sz;
struct sctp_initmsg initm;
/* include modified_sctpserv02 */
if (argc == 2)
stream_increment = atoi(argv[1]);
sock_fd = Socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
bzero(&initm,sizeof(initm));
initm.sinit_num_ostreams = SERV_MORE_STRMS_SCTP;
Setsockopt(sock_fd, IPPROTO_SCTP, SCTP_INITMSG,
&initm, sizeof(initm));
/* end modified_sctpserv02 */
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);
for ( ; ; ) {
len = sizeof(struct sockaddr_in);
rd_sz = Sctp_recvmsg(sock_fd, readbuf, sizeof(readbuf),
(SA *)&cliaddr, &len,
&sri,&msg_flags);
if(stream_increment) {
sri.sinfo_stream++;
if(sri.sinfo_stream >= sctp_get_no_strms(sock_fd,(SA *)&cliaddr, len))
sri.sinfo_stream = 0;
}
Sctp_sendmsg(sock_fd, readbuf, rd_sz,
(SA *)&cliaddr, len,
sri.sinfo_ppid,
sri.sinfo_flags,
sri.sinfo_stream,
0, 0);
}
}
int
main(int argc, char **argv)
{
int sock_fd,msg_flags;
char readbuf[BUFFSIZE];
struct sockaddr_in6 servaddr, cliaddr;
struct sctp_sndrcvinfo sri;
struct sctp_event_subscribe evnts;
int stream_increment=1;
socklen_t len;
size_t rd_sz;
if (argc == 2)
stream_increment = atoi(argv[1]);
sock_fd = socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP);
if (sock_fd < 0)
{
perror("socket()");
exit(errno);
}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin6_family = AF_INET;
// servaddr.sin6_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin6_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);
for ( ; ; ) {
len = sizeof(struct sockaddr_in6);
rd_sz = sctp_recvmsg(sock_fd, readbuf, sizeof(readbuf),
(SA *)&cliaddr, &len,
&sri,&msg_flags);
if(stream_increment) {
sri.sinfo_stream++;
if(sri.sinfo_stream >= sctp_get_no_strms(sock_fd,(SA *)&cliaddr, len))
sri.sinfo_stream = 0;
}
sctp_sendmsg(sock_fd, readbuf, rd_sz,
(SA *)&cliaddr, len,
sri.sinfo_ppid,
sri.sinfo_flags,
sri.sinfo_stream,
0, 0);
}
}
int main(int argc, char *argv[])
{
int sock_fd, msg_flags;
char readbuf[BUFFSIZE];
struct sockaddr_in servaddr, cliaddr;
struct sctp_sndrcvinfo sri;
struct sctp_event_subscribe evnts;
int stream_increment = 1;
socklen_t len;
size_t rd_sz;
//默认情况下服务器响应所有的流号是在其上接收消息的流号加1
if(argc == 2)
stream_increment = atoi(argv[1]);
//创建一个SCTP套接字
sock_fd = Socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
//捆绑一个地址，在待捆绑到该套接字地址结构中填入通陪地址(INADDR_ANY)和服务器的众所周知端口
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));
//预订感兴趣的通知，服务器修改一到多SCTP套接字的通知预订，服务器查看stcp_sndrcvinfo结构，服务器可从该结构确定消息到达所在的流号
bzero(&evnts, sizeof(evnts));
evnts.stcp_data_io_event = 1;
Setsockopt(sock_fd, IPPROTO_SCTP, SCTP_EVENTS, &evnts, sizeof(evnts));
//开启外来关联
Listen(sock_fd, LISTENQ);
for( ; ; ){
//服务器初始化客户套接字结构的大小，然后阻塞在等待来自任何一个远程对端的消息之上
len = sizeof(struct sockaddr_in);
rd_sz = Sctp_recvmsg(sock_fd, readbuf, sizeof(readbuf),
(SA *)&cliaddr, &len, &sri, &msg_flags);
//当消息到达时，服务器检查stream_incrment标志变量以确定是否需要增长流号
if(stream_increment){
sri.sinfo_stream++;
//如果流号増长到大于等于最大流号，服务器流号置1；
if(sri.sinfo_stream >= sctp_get_no_strms(sock_fd, (SA *)&cliaddr, len))
sri.sinfo_stream = 0;
}
//服务器使用来自sri结构的净荷协议ID，标志， 流号发送回消息本身,MSG_EOF标志促使服务器咋应答消息被客户成功确认之后关闭关联
Sctp_sendmsg(sock_fd, readbuf, rd_sz, (SA*)&cliaddr, len, sri.sinfo_ppid,
(sri.sinfo_flags | MSG_EOF), sri.sinfo_stream, 0, 0);
}
}