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sctp-server.c
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sctp-server.c
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//SCTP server program
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <time.h>
#include <netinet/sctp.h>
#include<netdb.h>
#define SIZE 1024
char buf[SIZE];
#define ECHO_PORT 2013
char *usage_msg = "usage: streamsend_echo_client ip-addr istreams ostreams stream";
void usage() {
fprintf(stderr, "%s\n", usage_msg);
exit(1);
}
int main(int argc, char *argv[]) {
int sockfd;
int len;
struct sockaddr_in serv_addr;
struct sockaddr_in *addresses;
int addr_size = sizeof(struct sockaddr_in);
int addr_count = argc - 1;
int port = ECHO_PORT;
char *message = "hello\n";
struct sctp_initmsg initmsg;
struct sctp_status status;
struct sctp_sndrcvinfo sinfo;
int ochannel;
char *strr;
//if (argc != 2) usage();
/* create endpoint */
sockfd = socket(AF_INET, SOCK_STREAM,IPPROTO_SCTP);
if (sockfd < 0) {
perror(NULL);
exit(2); }
/* connect to server */
addresses = malloc(addr_size);
if (addresses == NULL) {
exit(1);
}
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
serv_addr.sin_port = htons(port);
memcpy(addresses, &serv_addr, addr_size);
memset(&initmsg, 0, sizeof(initmsg));
initmsg.sinit_max_instreams =2;
initmsg.sinit_num_ostreams = 2;
printf("Asking for: input streams: %d, output streams: %d\n",initmsg.sinit_max_instreams,initmsg.sinit_num_ostreams);
if (setsockopt(sockfd, IPPROTO_SCTP,SCTP_INITMSG, &initmsg, sizeof(initmsg))) {
perror("set sock opt\n");
}
if (sctp_connectx(sockfd, (struct sockaddr *) addresses, 1,0) < 0)
{
perror("connectx");
exit(3);
}
memset(&status, 0, sizeof(status));
len = sizeof(status);
status.sstat_assoc_id = 1;
if (getsockopt(sockfd, IPPROTO_SCTP,SCTP_STATUS, &status, &len) == -1) {
perror("get sock opt\n");
}
printf("Got: input streams: %d, output streams: %d\n",status.sstat_instrms,status.sstat_outstrms);
/* sanity check channel */
ochannel = 0;
if (ochannel >= status.sstat_outstrms)
printf("Writing on illegal channel %d\n", ochannel);
time_t ctime_t;
struct tm *gtime;
time_t gmtime_t;
time_t curtime;
time(&curtime);
printf("Current time = %s", ctime(&curtime));
// transfer data
strr=ctime(&curtime);
bzero(&sinfo, sizeof(sinfo));
sinfo.sinfo_stream = ochannel;
sctp_send(sockfd, strr,strlen(strr),
&sinfo, 0);
sinfo.sinfo_flags = SCTP_EOF;
sctp_send(sockfd, NULL, 0,
&sinfo, 0);
time_t ltime;
time(<ime);
printf ("Coordinated Universal Time is %s\n",asctime(gmtime(<ime)));
//transfer data
strr= asctime(gmtime(<ime));
bzero(&sinfo, sizeof(sinfo));
sinfo.sinfo_stream = 1;
sctp_send(sockfd, strr, strlen(strr),
&sinfo, 0);
sinfo.sinfo_flags = SCTP_EOF;
sctp_send(sockfd, NULL, 0,
&sinfo, 0);
close(sockfd);
exit(0);
}