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252 lines
7.6 KiB
252 lines
7.6 KiB
/*
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* Copyright (C) 2011-2013 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: discard_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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#include <io.h>
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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 <unistd.h>
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#include <sys/socket.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 7
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static void
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handle_upcall(struct socket *sock, void *data, int flgs)
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{
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char namebuf[INET6_ADDRSTRLEN];
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const char *name;
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uint16_t port;
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char *buf;
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int events;
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while ((events = usrsctp_get_events(sock)) && (events & SCTP_EVENT_READ)) {
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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 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(sock, buf, BUFFERSIZE, (struct sockaddr *) &addr, &len, (void *)&rn,
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&infolen, &infotype, &flags);
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if (n < 0) {
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perror("usrsctp_recvv");
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}
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if (n == 0) {
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usrsctp_close(sock);
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return;
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}
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if (n > 0) {
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if (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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#ifdef _WIN32
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_write(_fileno(stdout), buf, (unsigned int)n);
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#else
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if (write(fileno(stdout), buf, n) < 0) {
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perror("write");
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}
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#endif
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switch (addr.ss_family) {
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#ifdef INET
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case AF_INET: {
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struct sockaddr_in addr4;
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memcpy(&addr4, (struct sockaddr_in *)&addr, sizeof(struct sockaddr_in));
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name = inet_ntop(AF_INET, &addr4.sin_addr, namebuf, INET_ADDRSTRLEN);
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port = ntohs(addr4.sin_port);
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break;
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}
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#endif
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#ifdef INET6
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case AF_INET6: {
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struct sockaddr_in6 addr6;
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memcpy(&addr6, (struct sockaddr_in6 *)&addr, sizeof(struct sockaddr_in6));
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name = inet_ntop(AF_INET6, &addr6.sin6_addr, namebuf, INET6_ADDRSTRLEN),
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port = ntohs(addr6.sin6_port);
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break;
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}
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#endif
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default:
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name = NULL;
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port = 0;
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break;
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}
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if (name == NULL) {
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printf("inet_ntop failed\n");
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free(buf);
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return;
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}
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printf("Msg of length %d received from %s:%u on stream %d with SSN %u and TSN %u, PPID %u, context %u.\n",
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(int)n,
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namebuf,
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port,
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rn.recvv_rcvinfo.rcv_sid,
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rn.recvv_rcvinfo.rcv_ssn,
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rn.recvv_rcvinfo.rcv_tsn,
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ntohl(rn.recvv_rcvinfo.rcv_ppid),
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rn.recvv_rcvinfo.rcv_context);
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if (flags & MSG_EOR) {
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struct sctp_sndinfo snd_info;
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snd_info.snd_sid = rn.recvv_rcvinfo.rcv_sid;
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snd_info.snd_flags = 0;
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if (rn.recvv_rcvinfo.rcv_flags & SCTP_UNORDERED) {
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snd_info.snd_flags |= SCTP_UNORDERED;
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}
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snd_info.snd_ppid = rn.recvv_rcvinfo.rcv_ppid;
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snd_info.snd_context = 0;
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snd_info.snd_assoc_id = rn.recvv_rcvinfo.rcv_assoc_id;
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if (usrsctp_sendv(sock, buf, (size_t) n, NULL, 0, &snd_info, sizeof(struct sctp_sndinfo), SCTP_SENDV_SNDINFO, 0) < 0) {
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perror("sctp_sendv");
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}
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}
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}
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}
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free(buf);
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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 *sock;
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struct sockaddr_in6 addr;
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struct sctp_udpencaps encaps;
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struct sctp_event event;
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uint16_t event_types[] = {SCTP_ASSOC_CHANGE,
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SCTP_PEER_ADDR_CHANGE,
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SCTP_REMOTE_ERROR,
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SCTP_SHUTDOWN_EVENT,
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SCTP_ADAPTATION_INDICATION,
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SCTP_PARTIAL_DELIVERY_EVENT};
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unsigned int i;
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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 ((sock = usrsctp_socket(AF_INET6, SOCK_SEQPACKET, 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(sock, 1);
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if (usrsctp_setsockopt(sock, 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(sock, 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(sock, 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(sock, 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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memset(&event, 0, sizeof(event));
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event.se_assoc_id = SCTP_FUTURE_ASSOC;
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event.se_on = 1;
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for (i = 0; i < (unsigned int)(sizeof(event_types)/sizeof(uint16_t)); i++) {
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event.se_type = event_types[i];
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if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)) < 0) {
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perror("usrsctp_setsockopt SCTP_EVENT");
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}
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}
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usrsctp_set_upcall(sock, handle_upcall, NULL);
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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(sock, (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(sock, 1) < 0) {
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perror("usrsctp_listen");
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}
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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(sock);
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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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