1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <unistd.h>
7 #include <arpa/inet.h>
8
main(int argc,char * argv[])9 int main(int argc, char *argv[])
10 {
11 struct sockaddr_in saddr = {}, daddr = {};
12 int sd, ret, len = sizeof(daddr);
13 struct timeval tv = {25, 0};
14 char buf[] = "hello";
15
16 if (argc != 6 || (strcmp(argv[1], "server") && strcmp(argv[1], "client"))) {
17 printf("%s <server|client> <LOCAL_IP> <LOCAL_PORT> <REMOTE_IP> <REMOTE_PORT>\n",
18 argv[0]);
19 return -1;
20 }
21
22 sd = socket(AF_INET, SOCK_SEQPACKET, IPPROTO_SCTP);
23 if (sd < 0) {
24 printf("Failed to create sd\n");
25 return -1;
26 }
27
28 saddr.sin_family = AF_INET;
29 saddr.sin_addr.s_addr = inet_addr(argv[2]);
30 saddr.sin_port = htons(atoi(argv[3]));
31
32 ret = bind(sd, (struct sockaddr *)&saddr, sizeof(saddr));
33 if (ret < 0) {
34 printf("Failed to bind to address\n");
35 goto out;
36 }
37
38 ret = listen(sd, 5);
39 if (ret < 0) {
40 printf("Failed to listen on port\n");
41 goto out;
42 }
43
44 daddr.sin_family = AF_INET;
45 daddr.sin_addr.s_addr = inet_addr(argv[4]);
46 daddr.sin_port = htons(atoi(argv[5]));
47
48 /* make test shorter than 25s */
49 ret = setsockopt(sd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
50 if (ret < 0) {
51 printf("Failed to setsockopt SO_RCVTIMEO\n");
52 goto out;
53 }
54
55 if (!strcmp(argv[1], "server")) {
56 sleep(1); /* wait a bit for client's INIT */
57 ret = connect(sd, (struct sockaddr *)&daddr, len);
58 if (ret < 0) {
59 printf("Failed to connect to peer\n");
60 goto out;
61 }
62 ret = recvfrom(sd, buf, sizeof(buf), 0, (struct sockaddr *)&daddr, &len);
63 if (ret < 0) {
64 printf("Failed to recv msg %d\n", ret);
65 goto out;
66 }
67 ret = sendto(sd, buf, strlen(buf) + 1, 0, (struct sockaddr *)&daddr, len);
68 if (ret < 0) {
69 printf("Failed to send msg %d\n", ret);
70 goto out;
71 }
72 printf("Server: sent! %d\n", ret);
73 }
74
75 if (!strcmp(argv[1], "client")) {
76 usleep(300000); /* wait a bit for server's listening */
77 ret = connect(sd, (struct sockaddr *)&daddr, len);
78 if (ret < 0) {
79 printf("Failed to connect to peer\n");
80 goto out;
81 }
82 sleep(1); /* wait a bit for server's delayed INIT_ACK to reproduce the issue */
83 ret = sendto(sd, buf, strlen(buf) + 1, 0, (struct sockaddr *)&daddr, len);
84 if (ret < 0) {
85 printf("Failed to send msg %d\n", ret);
86 goto out;
87 }
88 ret = recvfrom(sd, buf, sizeof(buf), 0, (struct sockaddr *)&daddr, &len);
89 if (ret < 0) {
90 printf("Failed to recv msg %d\n", ret);
91 goto out;
92 }
93 printf("Client: rcvd! %d\n", ret);
94 }
95 ret = 0;
96 out:
97 close(sd);
98 return ret;
99 }
100