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 <sys/types.h>
8#include <netinet/in.h>
9#include <arpa/inet.h>
10
11static void set_addr(struct sockaddr_storage *ss, char *ip, char *port, int *len)
12{
13 if (ss->ss_family == AF_INET) {
14 struct sockaddr_in *a = (struct sockaddr_in *)ss;
15
16 a->sin_addr.s_addr = inet_addr(ip);
17 a->sin_port = htons(atoi(port));
18 *len = sizeof(*a);
19 } else {
20 struct sockaddr_in6 *a = (struct sockaddr_in6 *)ss;
21
22 a->sin6_family = AF_INET6;
23 inet_pton(AF_INET6, ip, &a->sin6_addr);
24 a->sin6_port = htons(atoi(port));
25 *len = sizeof(*a);
26 }
27}
28
29static int do_client(int argc, char *argv[])
30{
31 struct sockaddr_storage ss;
32 char buf[] = "hello";
33 int csk, ret, len;
34
35 if (argc < 5) {
36 printf("%s client -4|6 IP PORT [IP PORT]\n", argv[0]);
37 return -1;
38 }
39
40 bzero((void *)&ss, sizeof(ss));
41 ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
42 csk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
43 if (csk < 0) {
44 printf("failed to create socket\n");
45 return -1;
46 }
47
48 if (argc >= 7) {
49 set_addr(ss: &ss, ip: argv[5], port: argv[6], len: &len);
50 ret = bind(csk, (struct sockaddr *)&ss, len);
51 if (ret < 0) {
52 printf("failed to bind to address\n");
53 return -1;
54 }
55 }
56
57 set_addr(ss: &ss, ip: argv[3], port: argv[4], len: &len);
58 ret = connect(csk, (struct sockaddr *)&ss, len);
59 if (ret < 0) {
60 printf("failed to connect to peer\n");
61 return -1;
62 }
63
64 ret = send(csk, buf, strlen(buf) + 1, 0);
65 if (ret < 0) {
66 printf("failed to send msg %d\n", ret);
67 return -1;
68 }
69 close(csk);
70
71 return 0;
72}
73
74int main(int argc, char *argv[])
75{
76 struct sockaddr_storage ss;
77 int lsk, csk, ret, len;
78 char buf[20];
79
80 if (argc < 2 || (strcmp(argv[1], "server") && strcmp(argv[1], "client"))) {
81 printf("%s server|client ...\n", argv[0]);
82 return -1;
83 }
84
85 if (!strcmp(argv[1], "client"))
86 return do_client(argc, argv);
87
88 if (argc < 5) {
89 printf("%s server -4|6 IP PORT [IFACE]\n", argv[0]);
90 return -1;
91 }
92
93 ss.ss_family = !strcmp(argv[2], "-4") ? AF_INET : AF_INET6;
94 lsk = socket(ss.ss_family, SOCK_STREAM, IPPROTO_SCTP);
95 if (lsk < 0) {
96 printf("failed to create lsk\n");
97 return -1;
98 }
99
100 if (argc >= 6) {
101 ret = setsockopt(lsk, SOL_SOCKET, SO_BINDTODEVICE,
102 argv[5], strlen(argv[5]) + 1);
103 if (ret < 0) {
104 printf("failed to bind to device\n");
105 return -1;
106 }
107 }
108
109 set_addr(ss: &ss, ip: argv[3], port: argv[4], len: &len);
110 ret = bind(lsk, (struct sockaddr *)&ss, len);
111 if (ret < 0) {
112 printf("failed to bind to address\n");
113 return -1;
114 }
115
116 ret = listen(lsk, 5);
117 if (ret < 0) {
118 printf("failed to listen on port\n");
119 return -1;
120 }
121
122 csk = accept(lsk, (struct sockaddr *)NULL, (socklen_t *)NULL);
123 if (csk < 0) {
124 printf("failed to accept new client\n");
125 return -1;
126 }
127
128 ret = recv(csk, buf, sizeof(buf), 0);
129 if (ret <= 0) {
130 printf("failed to recv msg %d\n", ret);
131 return -1;
132 }
133 close(csk);
134 close(lsk);
135
136 return 0;
137}
138

source code of linux/tools/testing/selftests/net/sctp_hello.c