/*
* Copyright (C) 2011-2013 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: echo_server [local_encaps_port] [remote_encaps_port]
*
* Example
* Server: $ ./echo_server 11111 22222
* Client: $ ./client 127.0.0.1 7 0 22222 11111
*/
#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 <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#include <usrsctp.h>
#include "programs_helper.h"
#define PORT 7
#define BUFFER_SIZE 10240
#define SLEEP 1
const int use_cb = 0;
static int
receive_cb(struct socket *sock, union sctp_sockstore addr, void *data,
size_t datalen, struct sctp_rcvinfo rcv, int flags, void *ulp_info)
{
char namebuf[INET6_ADDRSTRLEN];
const char *name;
uint16_t port;
if (data) {
if (flags & MSG_NOTIFICATION) {
printf("Notification of length %d received.\n", (int)datalen);
} else {
switch (addr.sa.sa_family) {
#ifdef INET
case AF_INET:
name = inet_ntop(AF_INET, &addr.sin.sin_addr, namebuf, INET_ADDRSTRLEN);
port = ntohs(addr.sin.sin_port);
break;
#endif
#ifdef INET6
case AF_INET6:
name = inet_ntop(AF_INET6, &addr.sin6.sin6_addr, namebuf, INET6_ADDRSTRLEN),
port = ntohs(addr.sin6.sin6_port);
break;
#endif
case AF_CONN:
#ifdef _WIN32
if (_snprintf(namebuf, INET6_ADDRSTRLEN, "%p", addr.sconn.sconn_addr) < 0) {
#else
if (snprintf(namebuf, INET6_ADDRSTRLEN, "%p", addr.sconn.sconn_addr) < 0) {
#endif
namebuf[0] = '\0';
}
name = namebuf;
port = ntohs(addr.sconn.sconn_port);
break;
default:
name = NULL;
port = 0;
break;
}
printf("Msg of length %d received from %s:%u on stream %u with SSN %u and TSN %u, PPID %u, context %u.\n",
(int)datalen,
name,
port,
rcv.rcv_sid,
rcv.rcv_ssn,
rcv.rcv_tsn,
ntohl(rcv.rcv_ppid),
rcv.rcv_context);
if (flags & MSG_EOR) {
struct sctp_sndinfo snd_info;
snd_info.snd_sid = rcv.rcv_sid;
snd_info.snd_flags = 0;
if (rcv.rcv_flags & SCTP_UNORDERED) {
snd_info.snd_flags |= SCTP_UNORDERED;
}
snd_info.snd_ppid = rcv.rcv_ppid;
snd_info.snd_context = 0;
snd_info.snd_assoc_id = rcv.rcv_assoc_id;
if (usrsctp_sendv(sock, data, datalen, NULL, 0, &snd_info, sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
perror("sctp_sendv");
}
}
}
free(data);
}
return (1);
}
int
main(int argc, char *argv[])
{
struct socket *sock;
struct sockaddr_in6 addr;
struct sctp_udpencaps encaps;
struct sctp_event event;
uint16_t event_types[] = {SCTP_ASSOC_CHANGE,
SCTP_PEER_ADDR_CHANGE,
SCTP_REMOTE_ERROR,
SCTP_SHUTDOWN_EVENT,
SCTP_ADAPTATION_INDICATION,
SCTP_PARTIAL_DELIVERY_EVENT};
unsigned int i;
struct sctp_assoc_value av;
const int on = 1;
ssize_t n;
int flags;
socklen_t from_len;
char buffer[BUFFER_SIZE];
char name[INET6_ADDRSTRLEN];
socklen_t infolen;
struct sctp_rcvinfo rcv_info;
unsigned int infotype;
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 ((sock = usrsctp_socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP, use_cb?receive_cb:NULL, NULL, 0, NULL)) == NULL) {
perror("usrsctp_socket");
}
if (usrsctp_setsockopt(sock, 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(sock, IPPROTO_SCTP, SCTP_CONTEXT, (const void*)&av, (socklen_t)sizeof(struct sctp_assoc_value)) < 0) {
perror("usrsctp_setsockopt SCTP_CONTEXT");
}
if (usrsctp_setsockopt(sock, 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(sock, 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");
}
}
memset(&event, 0, sizeof(event));
event.se_assoc_id = SCTP_FUTURE_ASSOC;
event.se_on = 1;
for (i = 0; i < (unsigned int)(sizeof(event_types)/sizeof(uint16_t)); i++) {
event.se_type = event_types[i];
if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)) < 0) {
perror("usrsctp_setsockopt SCTP_EVENT");
}
}
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(sock, (struct sockaddr *)&addr, sizeof(struct sockaddr_in6)) < 0) {
perror("usrsctp_bind");
}
if (usrsctp_listen(sock, 1) < 0) {
perror("usrsctp_listen");
}
while (1) {
if (use_cb) {
#ifdef _WIN32
Sleep(SLEEP * 1000);
#else
sleep(SLEEP);
#endif
} else {
from_len = (socklen_t)sizeof(struct sockaddr_in6);
flags = 0;
infolen = (socklen_t)sizeof(struct sctp_rcvinfo);
n = usrsctp_recvv(sock, (void*)buffer, BUFFER_SIZE, (struct sockaddr *) &addr, &from_len, (void *)&rcv_info,
&infolen, &infotype, &flags);
if (n > 0) {
if (flags & MSG_NOTIFICATION) {
printf("Notification of length %llu received.\n", (unsigned long long)n);
} else {
if (infotype == SCTP_RECVV_RCVINFO) {
printf("Msg of length %llu received from %s:%u on stream %u with SSN %u and TSN %u, PPID %u, context %u, complete %d.\n",
(unsigned long long)n,
inet_ntop(AF_INET6, &addr.sin6_addr, name, INET6_ADDRSTRLEN), ntohs(addr.sin6_port),
rcv_info.rcv_sid,
rcv_info.rcv_ssn,
rcv_info.rcv_tsn,
ntohl(rcv_info.rcv_ppid),
rcv_info.rcv_context,
(flags & MSG_EOR) ? 1 : 0);
if (flags & MSG_EOR) {
struct sctp_sndinfo snd_info;
snd_info.snd_sid = rcv_info.rcv_sid;
snd_info.snd_flags = 0;
if (rcv_info.rcv_flags & SCTP_UNORDERED) {
snd_info.snd_flags |= SCTP_UNORDERED;
}
snd_info.snd_ppid = rcv_info.rcv_ppid;
snd_info.snd_context = 0;
snd_info.snd_assoc_id = rcv_info.rcv_assoc_id;
if (usrsctp_sendv(sock, buffer, (size_t)n, NULL, 0, &snd_info, (socklen_t)sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
perror("sctp_sendv");
}
}
} else {
printf("Msg of length %llu received from %s:%u, complete %d.\n",
(unsigned long long)n,
inet_ntop(AF_INET6, &addr.sin6_addr, name, INET6_ADDRSTRLEN), ntohs(addr.sin6_port),
(flags & MSG_EOR) ? 1 : 0);
}
}
} else {
break;
}
}
}
usrsctp_close(sock);
while (usrsctp_finish() != 0) {
#ifdef _WIN32
Sleep(SLEEP * 1000);
#else
sleep(SLEEP);
#endif
}
return (0);
}