SCTP reciever

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <arpa/inet.h>
#include <strings.h>

#define PORT 5055

int main(void)
{
    int sock;
    int retval;

    char read_buff[1024];

    struct sockaddr_in bind_addr;
    struct sctp_sndrcvinfo sinfo;
    struct sctp_event_subscribe events;

    bzero(&sinfo, sizeof(sinfo));

    sock = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
    if (sock == -1) {
        perror("socket()");
        exit(-1);
    }

    bind_addr.sin_family = AF_INET;
    bind_addr.sin_port = htons(PORT);
    bind_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    if (bind_addr.sin_addr.s_addr == INADDR_NONE) {
        perror("inet_addr()");
        exit(-1);
    }

    retval = sctp_bindx(sock, (struct sockaddr *) &bind_addr, 1, SCTP_BINDX_ADD_ADDR);
    if (retval != 0) {
        perror("sctp_bindx()");
        exit(-1);
    }

    retval = listen(sock, 5);
    if (retval != 0) {
        perror("listen()");
        exit(-1);
    }

    events.sctp_data_io_event = 1;
    if ( setsockopt(sock, IPPROTO_SCTP, SCTP_EVENTS, &events, sizeof(events)) < 0 ) {
        perror("setsockopt()");
        exit(-1);
    }

    size_t count = 20;
    int msg_flags = 0;
    while(count != 0) {
        retval = sctp_recvmsg(sock, (void *)read_buff, sizeof(read_buff),
                           NULL, NULL, &sinfo, &msg_flags);
        if (retval < 0) {
            perror("sctp_recvmsg()");
            exit(-1);
        }

        printf("Got message! Assoc_id: 0x%X, msg: %s\n", sinfo.sinfo_assoc_id, read_buff);
        if (retval == 0) {
            break;
        }
        count--;
    }

    retval = close(sock);
    if (retval != 0) {
        perror("close()");
        exit(-1);
    }

    return 0;
}