1 /*
2 * Copyright (C) 2011-2013 Michael Tuexen
3 *
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the project nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 /*
32 * Usage: discard_server_upcall [local_encaps_port] [remote_encaps_port]
33 */
34
35 #ifdef _WIN32
36 #define _CRT_SECURE_NO_WARNINGS
37 #endif
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <stdarg.h>
42 #include <sys/types.h>
43 #ifndef _WIN32
44 #include <unistd.h>
45 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <arpa/inet.h>
48 #endif
49 #include <usrsctp.h>
50 #include "programs_helper.h"
51
52 #define BUFFERSIZE 10240
53 #define PORT 9
54
55
56 static void
handle_upcall(struct socket * sock,void * data,int flgs)57 handle_upcall(struct socket *sock, void *data, int flgs)
58 {
59 char namebuf[INET6_ADDRSTRLEN];
60 const char *name;
61 uint16_t port;
62 char *buf;
63 int events;
64
65 while ((events = usrsctp_get_events(sock)) && (events & SCTP_EVENT_READ)) {
66 struct sctp_recvv_rn rn;
67 ssize_t n;
68 struct sockaddr_storage addr;
69 buf = malloc(BUFFERSIZE);
70 int flags = 0;
71 socklen_t len = (socklen_t)sizeof(struct sockaddr_storage);
72 unsigned int infotype = 0;
73 socklen_t infolen = sizeof(struct sctp_recvv_rn);
74 memset(&rn, 0, sizeof(struct sctp_recvv_rn));
75 n = usrsctp_recvv(sock, buf, BUFFERSIZE, (struct sockaddr *) &addr, &len, (void *)&rn,
76 &infolen, &infotype, &flags);
77 if (n < 0) {
78 perror("usrsctp_recvv");
79 }
80 if (n > 0) {
81 if (flags & MSG_NOTIFICATION) {
82 printf("Notification of length %d received.\n", (int)n);
83 } else {
84 /*
85 #ifdef _WIN32
86 _write(_fileno(stdout), buf, (unsigned int)n);
87 #else
88 if (write(fileno(stdout), buf, n) < 0) {
89 perror("write");
90 }
91 #endif
92 */
93 switch (addr.ss_family) {
94 #ifdef INET
95 case AF_INET: {
96 struct sockaddr_in addr4;
97 memcpy(&addr4, (struct sockaddr_in *)&addr, sizeof(struct sockaddr_in));
98 name = inet_ntop(AF_INET, &addr4.sin_addr, namebuf, INET_ADDRSTRLEN);
99 port = ntohs(addr4.sin_port);
100 break;
101 }
102 #endif
103 #ifdef INET6
104 case AF_INET6: {
105 struct sockaddr_in6 addr6;
106 memcpy(&addr6, (struct sockaddr_in6 *)&addr, sizeof(struct sockaddr_in6));
107 name = inet_ntop(AF_INET6, &addr6.sin6_addr, namebuf, INET6_ADDRSTRLEN),
108 port = ntohs(addr6.sin6_port);
109 break;
110 }
111 #endif
112 default:
113 name = NULL;
114 port = 0;
115 break;
116 }
117
118 if (name == NULL) {
119 printf("inet_ntop failed\n");
120 free(buf);
121 return;
122 }
123
124 printf("Msg of length %d received from %s:%u on stream %d with SSN %u and TSN %u, PPID %u, context %u.\n",
125 (int)n,
126 namebuf,
127 port,
128 rn.recvv_rcvinfo.rcv_sid,
129 rn.recvv_rcvinfo.rcv_ssn,
130 rn.recvv_rcvinfo.rcv_tsn,
131 ntohl(rn.recvv_rcvinfo.rcv_ppid),
132 rn.recvv_rcvinfo.rcv_context);
133 }
134 }
135 free(buf);
136 }
137 return;
138 }
139
140 int
main(int argc,char * argv[])141 main(int argc, char *argv[])
142 {
143 struct socket *sock;
144 struct sockaddr_in6 addr;
145 struct sctp_udpencaps encaps;
146 struct sctp_event event;
147 uint16_t event_types[] = {SCTP_ASSOC_CHANGE,
148 SCTP_PEER_ADDR_CHANGE,
149 SCTP_REMOTE_ERROR,
150 SCTP_SHUTDOWN_EVENT,
151 SCTP_ADAPTATION_INDICATION,
152 SCTP_PARTIAL_DELIVERY_EVENT};
153 unsigned int i;
154 struct sctp_assoc_value av;
155 const int on = 1;
156
157 if (argc > 1) {
158 usrsctp_init(atoi(argv[1]), NULL, debug_printf_stack);
159 } else {
160 usrsctp_init(9899, NULL, debug_printf_stack);
161 }
162 #ifdef SCTP_DEBUG
163 usrsctp_sysctl_set_sctp_debug_on(SCTP_DEBUG_NONE);
164 #endif
165 usrsctp_sysctl_set_sctp_blackhole(2);
166 usrsctp_sysctl_set_sctp_no_csum_on_loopback(0);
167
168 if ((sock = usrsctp_socket(AF_INET6, SOCK_SEQPACKET, IPPROTO_SCTP, NULL, NULL, 0, NULL)) == NULL) {
169 perror("usrsctp_socket");
170 }
171 usrsctp_set_non_blocking(sock, 1);
172 if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_I_WANT_MAPPED_V4_ADDR, (const void*)&on, (socklen_t)sizeof(int)) < 0) {
173 perror("usrsctp_setsockopt SCTP_I_WANT_MAPPED_V4_ADDR");
174 }
175 memset(&av, 0, sizeof(struct sctp_assoc_value));
176 av.assoc_id = SCTP_ALL_ASSOC;
177 av.assoc_value = 47;
178
179 if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_CONTEXT, (const void*)&av, (socklen_t)sizeof(struct sctp_assoc_value)) < 0) {
180 perror("usrsctp_setsockopt SCTP_CONTEXT");
181 }
182 if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_RECVRCVINFO, &on, sizeof(int)) < 0) {
183 perror("usrsctp_setsockopt SCTP_RECVRCVINFO");
184 }
185 if (argc > 2) {
186 memset(&encaps, 0, sizeof(struct sctp_udpencaps));
187 encaps.sue_address.ss_family = AF_INET6;
188 encaps.sue_port = htons(atoi(argv[2]));
189 if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_REMOTE_UDP_ENCAPS_PORT, (const void*)&encaps, (socklen_t)sizeof(struct sctp_udpencaps)) < 0) {
190 perror("usrsctp_setsockopt SCTP_REMOTE_UDP_ENCAPS_PORT");
191 }
192 }
193 memset(&event, 0, sizeof(event));
194 event.se_assoc_id = SCTP_FUTURE_ASSOC;
195 event.se_on = 1;
196 for (i = 0; i < (unsigned int)(sizeof(event_types)/sizeof(uint16_t)); i++) {
197 event.se_type = event_types[i];
198 if (usrsctp_setsockopt(sock, IPPROTO_SCTP, SCTP_EVENT, &event, sizeof(struct sctp_event)) < 0) {
199 perror("usrsctp_setsockopt SCTP_EVENT");
200 }
201 }
202
203 usrsctp_set_upcall(sock, handle_upcall, NULL);
204
205 memset((void *)&addr, 0, sizeof(struct sockaddr_in6));
206 #ifdef HAVE_SIN6_LEN
207 addr.sin6_len = sizeof(struct sockaddr_in6);
208 #endif
209 addr.sin6_family = AF_INET6;
210 addr.sin6_port = htons(PORT);
211 addr.sin6_addr = in6addr_any;
212 if (usrsctp_bind(sock, (struct sockaddr *)&addr, sizeof(struct sockaddr_in6)) < 0) {
213 perror("usrsctp_bind");
214 }
215 if (usrsctp_listen(sock, 1) < 0) {
216 perror("usrsctp_listen");
217 }
218 while (1) {
219 #ifdef _WIN32
220 Sleep(1*1000);
221 #else
222 sleep(1);
223 #endif
224 }
225 usrsctp_close(sock);
226 while (usrsctp_finish() != 0) {
227 #ifdef _WIN32
228 Sleep(1000);
229 #else
230 sleep(1);
231 #endif
232 }
233 return (0);
234 }
235