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232 lines
6.7 KiB
232 lines
6.7 KiB
/*
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* Copyright (C) 2012-2013 Michael Tuexen
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Usage: chargen_server_upcall [local_encaps_port] [remote_encaps_port]
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*/
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#ifdef _WIN32
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#ifndef _WIN32
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#include <sys/socket.h>
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#include <unistd.h>
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#include <time.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#endif
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#include <usrsctp.h>
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#include "programs_helper.h"
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#define BUFFERSIZE 10240
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#define PORT 19
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char buffer[95];
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int done = 0;
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int send_done = 0;
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static void
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initBuffer(void) {
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int i, j;
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for (i = 32, j = 0; i < 126; i++, j++) {
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buffer[j] = i;
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}
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}
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unsigned int signCounter = 0;
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static void
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handle_upcall(struct socket *upcall_socket, void *upcall_data, int upcall_flags);
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static void
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handle_accept(struct socket *upcall_socket, void *upcall_data, int upcall_flags)
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{
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struct socket *conn_sock;
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if (((conn_sock = usrsctp_accept(upcall_socket, NULL, NULL)) == NULL)
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&& (errno != EINPROGRESS)) {
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perror("usrsctp_accept");
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return;
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}
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done = 0;
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printf("connection accepted from socket %p\n", (void *)conn_sock);
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usrsctp_set_upcall(conn_sock, handle_upcall, NULL);
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}
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static void
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handle_upcall(struct socket *upcall_socket, void *upcall_data, int upcall_flags)
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{
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int events = usrsctp_get_events(upcall_socket);
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if (events & SCTP_EVENT_READ && !send_done) {
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char *buf;
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struct sctp_recvv_rn rn;
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ssize_t n;
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struct sockaddr_storage addr;
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buf = malloc(BUFFERSIZE);
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int recv_flags = 0;
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socklen_t len = (socklen_t)sizeof(struct sockaddr_storage);
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unsigned int infotype = 0;
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socklen_t infolen = sizeof(struct sctp_recvv_rn);
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memset(&rn, 0, sizeof(struct sctp_recvv_rn));
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n = usrsctp_recvv(upcall_socket, buf, BUFFERSIZE, (struct sockaddr *) &addr, &len, (void *)&rn,
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&infolen, &infotype, &recv_flags);
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if (n < 0) {
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perror("usrsctp_recvv");
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done = 1;
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usrsctp_close(upcall_socket);
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printf("client socket %p closed\n", (void *)upcall_socket);
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upcall_socket = NULL;
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return;
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}
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if (n == 0) {
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done = 1;
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usrsctp_close(upcall_socket);
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printf("client socket %p closed\n", (void *)upcall_socket);
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upcall_socket = NULL;
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return;
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}
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if (n > 0) {
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if (recv_flags & MSG_NOTIFICATION) {
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printf("Notification of length %d received.\n", (int)n);
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} else {
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printf("data of size %d received\n", (int)n);
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}
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}
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free(buf);
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}
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if ((events & SCTP_EVENT_WRITE) && !done) {
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struct sctp_sndinfo snd_info;
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snd_info.snd_sid = 0;
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snd_info.snd_flags = 0;
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snd_info.snd_ppid = 0;
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snd_info.snd_context = 0;
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snd_info.snd_assoc_id = 0;
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if (usrsctp_sendv(upcall_socket, buffer, strlen(buffer), NULL, 0, &snd_info, (socklen_t)sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
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if (errno != EAGAIN && errno != EWOULDBLOCK) {
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send_done = 1;
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usrsctp_close(upcall_socket);
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printf("client socket %p closed\n", (void *)upcall_socket);
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return;
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}
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}
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}
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return;
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}
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int
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main(int argc, char *argv[])
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{
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struct socket *listening_socket;
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struct sockaddr_in6 addr;
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struct sctp_udpencaps encaps;
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struct sctp_assoc_value av;
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const int on = 1;
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if (argc > 1) {
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usrsctp_init(atoi(argv[1]), NULL, debug_printf_stack);
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} else {
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usrsctp_init(9899, NULL, debug_printf_stack);
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}
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#ifdef SCTP_DEBUG
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usrsctp_sysctl_set_sctp_debug_on(SCTP_DEBUG_NONE);
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#endif
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usrsctp_sysctl_set_sctp_blackhole(2);
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usrsctp_sysctl_set_sctp_no_csum_on_loopback(0);
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if ((listening_socket = usrsctp_socket(AF_INET6, SOCK_STREAM, IPPROTO_SCTP, NULL, NULL, 0, NULL)) == NULL) {
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perror("usrsctp_socket");
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}
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usrsctp_set_non_blocking(listening_socket, 1);
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if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_I_WANT_MAPPED_V4_ADDR, (const void*)&on, (socklen_t)sizeof(int)) < 0) {
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perror("usrsctp_setsockopt SCTP_I_WANT_MAPPED_V4_ADDR");
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}
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memset(&av, 0, sizeof(struct sctp_assoc_value));
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av.assoc_id = SCTP_ALL_ASSOC;
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av.assoc_value = 47;
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if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_CONTEXT, (const void*)&av, (socklen_t)sizeof(struct sctp_assoc_value)) < 0) {
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perror("usrsctp_setsockopt SCTP_CONTEXT");
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}
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if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_RECVRCVINFO, &on, sizeof(int)) < 0) {
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perror("usrsctp_setsockopt SCTP_RECVRCVINFO");
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}
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if (argc > 2) {
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memset(&encaps, 0, sizeof(struct sctp_udpencaps));
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encaps.sue_address.ss_family = AF_INET6;
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encaps.sue_port = htons(atoi(argv[2]));
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if (usrsctp_setsockopt(listening_socket, IPPROTO_SCTP, SCTP_REMOTE_UDP_ENCAPS_PORT, (const void*)&encaps, (socklen_t)sizeof(struct sctp_udpencaps)) < 0) {
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perror("usrsctp_setsockopt SCTP_REMOTE_UDP_ENCAPS_PORT");
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}
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}
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initBuffer();
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memset((void *)&addr, 0, sizeof(struct sockaddr_in6));
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#ifdef HAVE_SIN6_LEN
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addr.sin6_len = sizeof(struct sockaddr_in6);
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#endif
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addr.sin6_family = AF_INET6;
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addr.sin6_port = htons(PORT);
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addr.sin6_addr = in6addr_any;
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if (usrsctp_bind(listening_socket, (struct sockaddr *)&addr, sizeof(struct sockaddr_in6)) < 0) {
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perror("usrsctp_bind");
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}
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if (usrsctp_listen(listening_socket, 1) < 0) {
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perror("usrsctp_listen");
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}
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usrsctp_set_upcall(listening_socket, handle_accept, NULL);
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while (1) {
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#ifdef _WIN32
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Sleep(1*1000);
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#else
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sleep(1);
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#endif
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}
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usrsctp_close(listening_socket);
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while (usrsctp_finish() != 0) {
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#ifdef _WIN32
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Sleep(1000);
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#else
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sleep(1);
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#endif
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}
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return (0);
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}
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