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